4760 lines
121 KiB
C
4760 lines
121 KiB
C
/* Implementation of Fortran lexer
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Copyright (C) 1995-1998 Free Software Foundation, Inc.
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Contributed by James Craig Burley.
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This file is part of GNU Fortran.
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GNU Fortran is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Fortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Fortran; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#include "proj.h"
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#include "top.h"
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#include "bad.h"
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#include "com.h"
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#include "lex.h"
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#include "malloc.h"
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#include "src.h"
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#if FFECOM_targetCURRENT == FFECOM_targetGCC
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#include "flags.j"
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#include "input.j"
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#include "toplev.j"
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#include "tree.j"
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#include "output.j" /* Must follow tree.j so TREE_CODE is defined! */
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#endif
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#ifdef DWARF_DEBUGGING_INFO
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void dwarfout_resume_previous_source_file (register unsigned);
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void dwarfout_start_new_source_file (register char *);
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void dwarfout_define (register unsigned, register char *);
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void dwarfout_undef (register unsigned, register char *);
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#endif DWARF_DEBUGGING_INFO
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static void ffelex_append_to_token_ (char c);
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static int ffelex_backslash_ (int c, ffewhereColumnNumber col);
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static void ffelex_bad_1_ (ffebad errnum, ffewhereLineNumber ln0,
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ffewhereColumnNumber cn0);
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static void ffelex_bad_2_ (ffebad errnum, ffewhereLineNumber ln0,
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ffewhereColumnNumber cn0, ffewhereLineNumber ln1,
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ffewhereColumnNumber cn1);
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static void ffelex_bad_here_ (int num, ffewhereLineNumber ln0,
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ffewhereColumnNumber cn0);
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static void ffelex_finish_statement_ (void);
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#if FFECOM_targetCURRENT == FFECOM_targetGCC
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static int ffelex_get_directive_line_ (char **text, FILE *finput);
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static int ffelex_hash_ (FILE *f);
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#endif
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static ffewhereColumnNumber ffelex_image_char_ (int c,
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ffewhereColumnNumber col);
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static void ffelex_include_ (void);
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static bool ffelex_is_free_char_ctx_contin_ (ffewhereColumnNumber col);
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static bool ffelex_is_free_nonc_ctx_contin_ (ffewhereColumnNumber col);
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static void ffelex_next_line_ (void);
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static void ffelex_prepare_eos_ (void);
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static void ffelex_send_token_ (void);
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static ffelexHandler ffelex_swallow_tokens_ (ffelexToken t);
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static ffelexToken ffelex_token_new_ (void);
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/* Pertaining to the geometry of the input file. */
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/* Initial size for card image to be allocated. */
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#define FFELEX_columnINITIAL_SIZE_ 255
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/* The card image itself, which grows as source lines get longer. It
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has room for ffelex_card_size_ + 8 characters, and the length of the
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current image is ffelex_card_length_. (The + 8 characters are made
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available for easy handling of tabs and such.) */
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static char *ffelex_card_image_;
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static ffewhereColumnNumber ffelex_card_size_;
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static ffewhereColumnNumber ffelex_card_length_;
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/* Max width for free-form lines (ISO F90). */
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#define FFELEX_FREE_MAX_COLUMNS_ 132
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/* True if we saw a tab on the current line, as this (currently) means
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the line is therefore treated as though final_nontab_column_ were
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infinite. */
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static bool ffelex_saw_tab_;
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/* TRUE if current line is known to be erroneous, so don't bother
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expanding room for it just to display it. */
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static bool ffelex_bad_line_ = FALSE;
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/* Last column for vanilla, i.e. non-tabbed, line. Usually 72 or 132. */
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static ffewhereColumnNumber ffelex_final_nontab_column_;
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/* Array for quickly deciding what kind of line the current card has,
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based on its first character. */
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static ffelexType ffelex_first_char_[256];
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/* Pertaining to file management. */
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/* The wf argument of the most recent active ffelex_file_(fixed,free)
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function. */
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static ffewhereFile ffelex_current_wf_;
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/* TRUE if an INCLUDE statement can be processed (ffelex_set_include
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can be called). */
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static bool ffelex_permit_include_;
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/* TRUE if an INCLUDE statement is pending (ffelex_set_include has been
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called). */
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static bool ffelex_set_include_;
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/* Information on the pending INCLUDE file. */
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static FILE *ffelex_include_file_;
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static bool ffelex_include_free_form_;
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static ffewhereFile ffelex_include_wherefile_;
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/* Current master line count. */
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static ffewhereLineNumber ffelex_linecount_current_;
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/* Next master line count. */
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static ffewhereLineNumber ffelex_linecount_next_;
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/* ffewhere info on the latest (currently active) line read from the
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active source file. */
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static ffewhereLine ffelex_current_wl_;
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static ffewhereColumn ffelex_current_wc_;
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/* Pertaining to tokens in general. */
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/* Initial capacity for text in a CHARACTER/HOLLERITH/NAME/NAMES/NUMBER
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token. */
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#define FFELEX_columnTOKEN_SIZE_ 63
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#if FFELEX_columnTOKEN_SIZE_ < FFEWHERE_indexMAX
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#error "token size too small!"
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#endif
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/* Current token being lexed. */
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static ffelexToken ffelex_token_;
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/* Handler for current token. */
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static ffelexHandler ffelex_handler_;
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/* TRUE if fixed-form lexer is to generate NAMES instead of NAME tokens. */
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static bool ffelex_names_;
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/* TRUE if both lexers are to generate NAMES instead of NAME tokens. */
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static bool ffelex_names_pure_;
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/* TRUE if 0-9 starts a NAME token instead of NUMBER, for parsing hex
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numbers. */
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static bool ffelex_hexnum_;
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/* For ffelex_swallow_tokens(). */
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static ffelexHandler ffelex_eos_handler_;
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/* Number of tokens sent since last EOS or beginning of input file
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(include INCLUDEd files). */
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static unsigned long int ffelex_number_of_tokens_;
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/* Number of labels sent (as NUMBER tokens) since last reset of
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ffelex_number_of_tokens_ to 0, should be 0 or 1 in most cases.
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(Fixed-form source only.) */
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static unsigned long int ffelex_label_tokens_;
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/* Metering for token management, to catch token-memory leaks. */
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static long int ffelex_total_tokens_ = 0;
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static long int ffelex_old_total_tokens_ = 1;
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static long int ffelex_token_nextid_ = 0;
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/* Pertaining to lexing CHARACTER and HOLLERITH tokens. */
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/* >0 if a Hollerith constant of that length might be in mid-lex, used
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when the next character seen is 'H' or 'h' to enter HOLLERITH lexing
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mode (see ffelex_raw_mode_). */
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static long int ffelex_expecting_hollerith_;
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/* -3: Backslash (escape) sequence being lexed in CHARACTER.
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-2: Possible closing apostrophe/quote seen in CHARACTER.
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-1: Lexing CHARACTER.
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0: Not lexing CHARACTER or HOLLERITH.
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>0: Lexing HOLLERITH, value is # chars remaining to expect. */
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static long int ffelex_raw_mode_;
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/* When lexing CHARACTER, open quote/apostrophe (either ' or "). */
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static char ffelex_raw_char_;
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/* TRUE when backslash processing had to use most recent character
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to finish its state engine, but that character is not part of
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the backslash sequence, so must be reconsidered as a "normal"
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character in CHARACTER/HOLLERITH lexing. */
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static bool ffelex_backslash_reconsider_ = FALSE;
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/* Characters preread before lexing happened (might include EOF). */
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static int *ffelex_kludge_chars_ = NULL;
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/* Doing the kludge processing, so not initialized yet. */
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static bool ffelex_kludge_flag_ = FALSE;
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/* The beginning of a (possible) CHARACTER/HOLLERITH token. */
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static ffewhereLine ffelex_raw_where_line_;
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static ffewhereColumn ffelex_raw_where_col_;
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/* Call this to append another character to the current token. If it isn't
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currently big enough for it, it will be enlarged. The current token
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must be a CHARACTER, HOLLERITH, NAME, NAMES, or NUMBER. */
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static void
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ffelex_append_to_token_ (char c)
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{
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if (ffelex_token_->text == NULL)
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{
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ffelex_token_->text
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= malloc_new_ksr (malloc_pool_image (), "FFELEX token text",
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FFELEX_columnTOKEN_SIZE_ + 1);
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ffelex_token_->size = FFELEX_columnTOKEN_SIZE_;
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ffelex_token_->length = 0;
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}
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else if (ffelex_token_->length >= ffelex_token_->size)
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{
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ffelex_token_->text
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= malloc_resize_ksr (malloc_pool_image (),
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ffelex_token_->text,
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(ffelex_token_->size << 1) + 1,
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ffelex_token_->size + 1);
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ffelex_token_->size <<= 1;
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assert (ffelex_token_->length < ffelex_token_->size);
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}
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#ifdef MAP_CHARACTER
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Sorry, MAP_CHARACTER is not going to work as expected in GNU Fortran,
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please contact fortran@gnu.org if you wish to fund work to
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port g77 to non-ASCII machines.
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#endif
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ffelex_token_->text[ffelex_token_->length++] = c;
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}
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/* Do backslash (escape) processing for a CHARACTER/HOLLERITH token
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being lexed. */
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static int
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ffelex_backslash_ (int c, ffewhereColumnNumber col)
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{
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static int state = 0;
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static unsigned int count;
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static int code;
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static unsigned int firstdig = 0;
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static int nonnull;
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static ffewhereLineNumber line;
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static ffewhereColumnNumber column;
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/* See gcc/c-lex.c readescape() for a straightforward version
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of this state engine for handling backslashes in character/
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hollerith constants. */
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#define wide_flag 0
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#define warn_traditional 0
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#define flag_traditional 0
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switch (state)
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{
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case 0:
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if ((c == '\\')
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&& (ffelex_raw_mode_ != 0)
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&& ffe_is_backslash ())
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{
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state = 1;
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column = col + 1;
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line = ffelex_linecount_current_;
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return EOF;
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}
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return c;
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case 1:
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state = 0; /* Assume simple case. */
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switch (c)
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{
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case 'x':
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if (warn_traditional)
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{
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ffebad_start_msg_lex ("The meaning of `\\x' (at %0) varies with -traditional",
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FFEBAD_severityWARNING);
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ffelex_bad_here_ (0, line, column);
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ffebad_finish ();
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}
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if (flag_traditional)
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return c;
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code = 0;
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count = 0;
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nonnull = 0;
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state = 2;
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return EOF;
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7':
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code = c - '0';
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count = 1;
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state = 3;
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return EOF;
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case '\\': case '\'': case '"':
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return c;
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#if 0 /* Inappropriate for Fortran. */
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case '\n':
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ffelex_next_line_ ();
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*ignore_ptr = 1;
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return 0;
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#endif
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case 'n':
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return TARGET_NEWLINE;
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case 't':
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return TARGET_TAB;
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case 'r':
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return TARGET_CR;
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case 'f':
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return TARGET_FF;
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case 'b':
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return TARGET_BS;
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case 'a':
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if (warn_traditional)
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{
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ffebad_start_msg_lex ("The meaning of `\\a' (at %0) varies with -traditional",
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FFEBAD_severityWARNING);
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ffelex_bad_here_ (0, line, column);
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ffebad_finish ();
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}
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if (flag_traditional)
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return c;
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return TARGET_BELL;
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case 'v':
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#if 0 /* Vertical tab is present in common usage compilers. */
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if (flag_traditional)
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return c;
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#endif
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return TARGET_VT;
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case 'e':
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||
case 'E':
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case '(':
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case '{':
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case '[':
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case '%':
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if (pedantic)
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{
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char m[2];
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m[0] = c;
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m[1] = '\0';
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ffebad_start_msg_lex ("Non-ANSI-C-standard escape sequence `\\%A' at %0",
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FFEBAD_severityPEDANTIC);
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ffelex_bad_here_ (0, line, column);
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ffebad_string (m);
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ffebad_finish ();
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}
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return (c == 'E' || c == 'e') ? 033 : c;
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case '?':
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return c;
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default:
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if (c >= 040 && c < 0177)
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{
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||
char m[2];
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m[0] = c;
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m[1] = '\0';
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ffebad_start_msg_lex ("Unknown escape sequence `\\%A' at %0",
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FFEBAD_severityPEDANTIC);
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ffelex_bad_here_ (0, line, column);
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ffebad_string (m);
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ffebad_finish ();
|
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}
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else if (c == EOF)
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||
{
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||
ffebad_start_msg_lex ("Unterminated escape sequence `\\' at %0",
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FFEBAD_severityPEDANTIC);
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ffelex_bad_here_ (0, line, column);
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ffebad_finish ();
|
||
}
|
||
else
|
||
{
|
||
char m[20];
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||
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sprintf (&m[0], "%x", c);
|
||
ffebad_start_msg_lex ("Unknown escape sequence `\\' followed by char code 0x%A at %0",
|
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FFEBAD_severityPEDANTIC);
|
||
ffelex_bad_here_ (0, line, column);
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||
ffebad_string (m);
|
||
ffebad_finish ();
|
||
}
|
||
}
|
||
return c;
|
||
|
||
case 2:
|
||
if ((c >= 'a' && c <= 'f')
|
||
|| (c >= 'A' && c <= 'F')
|
||
|| (c >= '0' && c <= '9'))
|
||
{
|
||
code *= 16;
|
||
if (c >= 'a' && c <= 'f')
|
||
code += c - 'a' + 10;
|
||
if (c >= 'A' && c <= 'F')
|
||
code += c - 'A' + 10;
|
||
if (c >= '0' && c <= '9')
|
||
code += c - '0';
|
||
if (code != 0 || count != 0)
|
||
{
|
||
if (count == 0)
|
||
firstdig = code;
|
||
count++;
|
||
}
|
||
nonnull = 1;
|
||
return EOF;
|
||
}
|
||
|
||
state = 0;
|
||
|
||
if (! nonnull)
|
||
{
|
||
ffebad_start_msg_lex ("\\x used at %0 with no following hex digits",
|
||
FFEBAD_severityFATAL);
|
||
ffelex_bad_here_ (0, line, column);
|
||
ffebad_finish ();
|
||
}
|
||
else if (count == 0)
|
||
/* Digits are all 0's. Ok. */
|
||
;
|
||
else if ((count - 1) * 4 >= TYPE_PRECISION (integer_type_node)
|
||
|| (count > 1
|
||
&& ((1 << (TYPE_PRECISION (integer_type_node) - (count - 1) * 4))
|
||
<= (int) firstdig)))
|
||
{
|
||
ffebad_start_msg_lex ("Hex escape at %0 out of range",
|
||
FFEBAD_severityPEDANTIC);
|
||
ffelex_bad_here_ (0, line, column);
|
||
ffebad_finish ();
|
||
}
|
||
break;
|
||
|
||
case 3:
|
||
if ((c <= '7') && (c >= '0') && (count++ < 3))
|
||
{
|
||
code = (code * 8) + (c - '0');
|
||
return EOF;
|
||
}
|
||
state = 0;
|
||
break;
|
||
|
||
default:
|
||
assert ("bad backslash state" == NULL);
|
||
abort ();
|
||
}
|
||
|
||
/* Come here when code has a built character, and c is the next
|
||
character that might (or might not) be the next one in the constant. */
|
||
|
||
/* Don't bother doing this check for each character going into
|
||
CHARACTER or HOLLERITH constants, just the escaped-value ones.
|
||
gcc apparently checks every single character, which seems
|
||
like it'd be kinda slow and not worth doing anyway. */
|
||
|
||
if (!wide_flag
|
||
&& TYPE_PRECISION (char_type_node) < HOST_BITS_PER_INT
|
||
&& code >= (1 << TYPE_PRECISION (char_type_node)))
|
||
{
|
||
ffebad_start_msg_lex ("Escape sequence at %0 out of range for character",
|
||
FFEBAD_severityFATAL);
|
||
ffelex_bad_here_ (0, line, column);
|
||
ffebad_finish ();
|
||
}
|
||
|
||
if (c == EOF)
|
||
{
|
||
/* Known end of constant, just append this character. */
|
||
ffelex_append_to_token_ (code);
|
||
if (ffelex_raw_mode_ > 0)
|
||
--ffelex_raw_mode_;
|
||
return EOF;
|
||
}
|
||
|
||
/* Have two characters to handle. Do the first, then leave it to the
|
||
caller to detect anything special about the second. */
|
||
|
||
ffelex_append_to_token_ (code);
|
||
if (ffelex_raw_mode_ > 0)
|
||
--ffelex_raw_mode_;
|
||
ffelex_backslash_reconsider_ = TRUE;
|
||
return c;
|
||
}
|
||
|
||
/* ffelex_bad_1_ -- Issue diagnostic with one source point
|
||
|
||
ffelex_bad_1_(FFEBAD_SOME_ERROR,ffelex_linecount_current_,column + 1);
|
||
|
||
Creates ffewhere line and column objects for the source point, sends them
|
||
along with the error code to ffebad, then kills the line and column
|
||
objects before returning. */
|
||
|
||
static void
|
||
ffelex_bad_1_ (ffebad errnum, ffewhereLineNumber ln0, ffewhereColumnNumber cn0)
|
||
{
|
||
ffewhereLine wl0;
|
||
ffewhereColumn wc0;
|
||
|
||
wl0 = ffewhere_line_new (ln0);
|
||
wc0 = ffewhere_column_new (cn0);
|
||
ffebad_start_lex (errnum);
|
||
ffebad_here (0, wl0, wc0);
|
||
ffebad_finish ();
|
||
ffewhere_line_kill (wl0);
|
||
ffewhere_column_kill (wc0);
|
||
}
|
||
|
||
/* ffelex_bad_2_ -- Issue diagnostic with two source points
|
||
|
||
ffelex_bad_2_(FFEBAD_SOME_ERROR,ffelex_linecount_current_,column + 1,
|
||
otherline,othercolumn);
|
||
|
||
Creates ffewhere line and column objects for the source points, sends them
|
||
along with the error code to ffebad, then kills the line and column
|
||
objects before returning. */
|
||
|
||
static void
|
||
ffelex_bad_2_ (ffebad errnum, ffewhereLineNumber ln0, ffewhereColumnNumber cn0,
|
||
ffewhereLineNumber ln1, ffewhereColumnNumber cn1)
|
||
{
|
||
ffewhereLine wl0, wl1;
|
||
ffewhereColumn wc0, wc1;
|
||
|
||
wl0 = ffewhere_line_new (ln0);
|
||
wc0 = ffewhere_column_new (cn0);
|
||
wl1 = ffewhere_line_new (ln1);
|
||
wc1 = ffewhere_column_new (cn1);
|
||
ffebad_start_lex (errnum);
|
||
ffebad_here (0, wl0, wc0);
|
||
ffebad_here (1, wl1, wc1);
|
||
ffebad_finish ();
|
||
ffewhere_line_kill (wl0);
|
||
ffewhere_column_kill (wc0);
|
||
ffewhere_line_kill (wl1);
|
||
ffewhere_column_kill (wc1);
|
||
}
|
||
|
||
static void
|
||
ffelex_bad_here_ (int n, ffewhereLineNumber ln0,
|
||
ffewhereColumnNumber cn0)
|
||
{
|
||
ffewhereLine wl0;
|
||
ffewhereColumn wc0;
|
||
|
||
wl0 = ffewhere_line_new (ln0);
|
||
wc0 = ffewhere_column_new (cn0);
|
||
ffebad_here (n, wl0, wc0);
|
||
ffewhere_line_kill (wl0);
|
||
ffewhere_column_kill (wc0);
|
||
}
|
||
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
static int
|
||
ffelex_getc_ (FILE *finput)
|
||
{
|
||
int c;
|
||
|
||
if (ffelex_kludge_chars_ == NULL)
|
||
return getc (finput);
|
||
|
||
c = *ffelex_kludge_chars_++;
|
||
if (c != 0)
|
||
return c;
|
||
|
||
ffelex_kludge_chars_ = NULL;
|
||
return getc (finput);
|
||
}
|
||
|
||
#endif
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
static int
|
||
ffelex_cfebackslash_ (int *use_d, int *d, FILE *finput)
|
||
{
|
||
register int c = getc (finput);
|
||
register int code;
|
||
register unsigned count;
|
||
unsigned firstdig = 0;
|
||
int nonnull;
|
||
|
||
*use_d = 0;
|
||
|
||
switch (c)
|
||
{
|
||
case 'x':
|
||
if (warn_traditional)
|
||
warning ("the meaning of `\\x' varies with -traditional");
|
||
|
||
if (flag_traditional)
|
||
return c;
|
||
|
||
code = 0;
|
||
count = 0;
|
||
nonnull = 0;
|
||
while (1)
|
||
{
|
||
c = getc (finput);
|
||
if (!(c >= 'a' && c <= 'f')
|
||
&& !(c >= 'A' && c <= 'F')
|
||
&& !(c >= '0' && c <= '9'))
|
||
{
|
||
*use_d = 1;
|
||
*d = c;
|
||
break;
|
||
}
|
||
code *= 16;
|
||
if (c >= 'a' && c <= 'f')
|
||
code += c - 'a' + 10;
|
||
if (c >= 'A' && c <= 'F')
|
||
code += c - 'A' + 10;
|
||
if (c >= '0' && c <= '9')
|
||
code += c - '0';
|
||
if (code != 0 || count != 0)
|
||
{
|
||
if (count == 0)
|
||
firstdig = code;
|
||
count++;
|
||
}
|
||
nonnull = 1;
|
||
}
|
||
if (! nonnull)
|
||
error ("\\x used with no following hex digits");
|
||
else if (count == 0)
|
||
/* Digits are all 0's. Ok. */
|
||
;
|
||
else if ((count - 1) * 4 >= TYPE_PRECISION (integer_type_node)
|
||
|| (count > 1
|
||
&& (((unsigned) 1
|
||
<< (TYPE_PRECISION (integer_type_node) - (count - 1)
|
||
* 4))
|
||
<= firstdig)))
|
||
pedwarn ("hex escape out of range");
|
||
return code;
|
||
|
||
case '0': case '1': case '2': case '3': case '4':
|
||
case '5': case '6': case '7':
|
||
code = 0;
|
||
count = 0;
|
||
while ((c <= '7') && (c >= '0') && (count++ < 3))
|
||
{
|
||
code = (code * 8) + (c - '0');
|
||
c = getc (finput);
|
||
}
|
||
*use_d = 1;
|
||
*d = c;
|
||
return code;
|
||
|
||
case '\\': case '\'': case '"':
|
||
return c;
|
||
|
||
case '\n':
|
||
ffelex_next_line_ ();
|
||
*use_d = 2;
|
||
return 0;
|
||
|
||
case EOF:
|
||
*use_d = 1;
|
||
*d = EOF;
|
||
return EOF;
|
||
|
||
case 'n':
|
||
return TARGET_NEWLINE;
|
||
|
||
case 't':
|
||
return TARGET_TAB;
|
||
|
||
case 'r':
|
||
return TARGET_CR;
|
||
|
||
case 'f':
|
||
return TARGET_FF;
|
||
|
||
case 'b':
|
||
return TARGET_BS;
|
||
|
||
case 'a':
|
||
if (warn_traditional)
|
||
warning ("the meaning of `\\a' varies with -traditional");
|
||
|
||
if (flag_traditional)
|
||
return c;
|
||
return TARGET_BELL;
|
||
|
||
case 'v':
|
||
#if 0 /* Vertical tab is present in common usage compilers. */
|
||
if (flag_traditional)
|
||
return c;
|
||
#endif
|
||
return TARGET_VT;
|
||
|
||
case 'e':
|
||
case 'E':
|
||
if (pedantic)
|
||
pedwarn ("non-ANSI-standard escape sequence, `\\%c'", c);
|
||
return 033;
|
||
|
||
case '?':
|
||
return c;
|
||
|
||
/* `\(', etc, are used at beginning of line to avoid confusing Emacs. */
|
||
case '(':
|
||
case '{':
|
||
case '[':
|
||
/* `\%' is used to prevent SCCS from getting confused. */
|
||
case '%':
|
||
if (pedantic)
|
||
pedwarn ("non-ANSI escape sequence `\\%c'", c);
|
||
return c;
|
||
}
|
||
if (c >= 040 && c < 0177)
|
||
pedwarn ("unknown escape sequence `\\%c'", c);
|
||
else
|
||
pedwarn ("unknown escape sequence: `\\' followed by char code 0x%x", c);
|
||
return c;
|
||
}
|
||
|
||
#endif
|
||
/* A miniature version of the C front-end lexer. */
|
||
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
static int
|
||
ffelex_cfelex_ (ffelexToken *xtoken, FILE *finput, int c)
|
||
{
|
||
ffelexToken token;
|
||
char buff[129];
|
||
char *p;
|
||
char *q;
|
||
char *r;
|
||
register unsigned buffer_length;
|
||
|
||
if ((*xtoken != NULL) && !ffelex_kludge_flag_)
|
||
ffelex_token_kill (*xtoken);
|
||
|
||
switch (c)
|
||
{
|
||
case '0': case '1': case '2': case '3': case '4':
|
||
case '5': case '6': case '7': case '8': case '9':
|
||
buffer_length = ARRAY_SIZE (buff);
|
||
p = &buff[0];
|
||
q = p;
|
||
r = &buff[buffer_length];
|
||
for (;;)
|
||
{
|
||
*p++ = c;
|
||
if (p >= r)
|
||
{
|
||
register unsigned bytes_used = (p - q);
|
||
|
||
buffer_length *= 2;
|
||
q = (char *)xrealloc (q, buffer_length);
|
||
p = &q[bytes_used];
|
||
r = &q[buffer_length];
|
||
}
|
||
c = ffelex_getc_ (finput);
|
||
if (! ISDIGIT (c))
|
||
break;
|
||
}
|
||
*p = '\0';
|
||
token = ffelex_token_new_number (q, ffewhere_line_unknown (),
|
||
ffewhere_column_unknown ());
|
||
|
||
if (q != &buff[0])
|
||
free (q);
|
||
|
||
break;
|
||
|
||
case '\"':
|
||
buffer_length = ARRAY_SIZE (buff);
|
||
p = &buff[0];
|
||
q = p;
|
||
r = &buff[buffer_length];
|
||
c = ffelex_getc_ (finput);
|
||
for (;;)
|
||
{
|
||
bool done = FALSE;
|
||
int use_d = 0;
|
||
int d;
|
||
|
||
switch (c)
|
||
{
|
||
case '\"':
|
||
c = getc (finput);
|
||
done = TRUE;
|
||
break;
|
||
|
||
case '\\': /* ~~~~~ */
|
||
c = ffelex_cfebackslash_ (&use_d, &d, finput);
|
||
break;
|
||
|
||
case EOF:
|
||
case '\n':
|
||
fatal ("Badly formed directive -- no closing quote");
|
||
done = TRUE;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
if (done)
|
||
break;
|
||
|
||
if (use_d != 2) /* 0=>c, 1=>cd, 2=>nil. */
|
||
{
|
||
*p++ = c;
|
||
if (p >= r)
|
||
{
|
||
register unsigned bytes_used = (p - q);
|
||
|
||
buffer_length = bytes_used * 2;
|
||
q = (char *)xrealloc (q, buffer_length);
|
||
p = &q[bytes_used];
|
||
r = &q[buffer_length];
|
||
}
|
||
}
|
||
if (use_d == 1)
|
||
c = d;
|
||
else
|
||
c = getc (finput);
|
||
}
|
||
*p = '\0';
|
||
token = ffelex_token_new_character (q, ffewhere_line_unknown (),
|
||
ffewhere_column_unknown ());
|
||
|
||
if (q != &buff[0])
|
||
free (q);
|
||
|
||
break;
|
||
|
||
default:
|
||
token = NULL;
|
||
break;
|
||
}
|
||
|
||
*xtoken = token;
|
||
return c;
|
||
}
|
||
#endif
|
||
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
static void
|
||
ffelex_file_pop_ (char *input_filename)
|
||
{
|
||
if (input_file_stack->next)
|
||
{
|
||
struct file_stack *p = input_file_stack;
|
||
input_file_stack = p->next;
|
||
free (p);
|
||
input_file_stack_tick++;
|
||
#ifdef DWARF_DEBUGGING_INFO
|
||
if (debug_info_level == DINFO_LEVEL_VERBOSE
|
||
&& write_symbols == DWARF_DEBUG)
|
||
dwarfout_resume_previous_source_file (input_file_stack->line);
|
||
#endif /* DWARF_DEBUGGING_INFO */
|
||
}
|
||
else
|
||
error ("#-lines for entering and leaving files don't match");
|
||
|
||
/* Now that we've pushed or popped the input stack,
|
||
update the name in the top element. */
|
||
if (input_file_stack)
|
||
input_file_stack->name = input_filename;
|
||
}
|
||
|
||
#endif
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
static void
|
||
ffelex_file_push_ (int old_lineno, char *input_filename)
|
||
{
|
||
struct file_stack *p
|
||
= (struct file_stack *) xmalloc (sizeof (struct file_stack));
|
||
|
||
input_file_stack->line = old_lineno;
|
||
p->next = input_file_stack;
|
||
p->name = input_filename;
|
||
input_file_stack = p;
|
||
input_file_stack_tick++;
|
||
#ifdef DWARF_DEBUGGING_INFO
|
||
if (debug_info_level == DINFO_LEVEL_VERBOSE
|
||
&& write_symbols == DWARF_DEBUG)
|
||
dwarfout_start_new_source_file (input_filename);
|
||
#endif /* DWARF_DEBUGGING_INFO */
|
||
|
||
/* Now that we've pushed or popped the input stack,
|
||
update the name in the top element. */
|
||
if (input_file_stack)
|
||
input_file_stack->name = input_filename;
|
||
}
|
||
#endif
|
||
|
||
/* Prepare to finish a statement-in-progress by sending the current
|
||
token, if any, then setting up EOS as the current token with the
|
||
appropriate current pointer. The caller can then move the current
|
||
pointer before actually sending EOS, if desired, as it is in
|
||
typical fixed-form cases. */
|
||
|
||
static void
|
||
ffelex_prepare_eos_ ()
|
||
{
|
||
if (ffelex_token_->type != FFELEX_typeNONE)
|
||
{
|
||
ffelex_backslash_ (EOF, 0);
|
||
|
||
switch (ffelex_raw_mode_)
|
||
{
|
||
case -2:
|
||
break;
|
||
|
||
case -1:
|
||
ffebad_start_lex ((ffelex_raw_char_ == '\'') ? FFEBAD_NO_CLOSING_APOSTROPHE
|
||
: FFEBAD_NO_CLOSING_QUOTE);
|
||
ffebad_here (0, ffelex_token_->where_line, ffelex_token_->where_col);
|
||
ffebad_here (1, ffelex_current_wl_, ffelex_current_wc_);
|
||
ffebad_finish ();
|
||
break;
|
||
|
||
case 0:
|
||
break;
|
||
|
||
default:
|
||
{
|
||
char num[20];
|
||
|
||
ffebad_start_lex (FFEBAD_NOT_ENOUGH_HOLLERITH_CHARS);
|
||
ffebad_here (0, ffelex_token_->where_line, ffelex_token_->where_col);
|
||
ffebad_here (1, ffelex_current_wl_, ffelex_current_wc_);
|
||
sprintf (num, "%lu", (unsigned long) ffelex_raw_mode_);
|
||
ffebad_string (num);
|
||
ffebad_finish ();
|
||
/* Make sure the token has some text, might as well fill up with spaces. */
|
||
do
|
||
{
|
||
ffelex_append_to_token_ (' ');
|
||
} while (--ffelex_raw_mode_ > 0);
|
||
break;
|
||
}
|
||
}
|
||
ffelex_raw_mode_ = 0;
|
||
ffelex_send_token_ ();
|
||
}
|
||
ffelex_token_->type = FFELEX_typeEOS;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_use (ffelex_current_wc_);
|
||
}
|
||
|
||
static void
|
||
ffelex_finish_statement_ ()
|
||
{
|
||
if ((ffelex_number_of_tokens_ == 0)
|
||
&& (ffelex_token_->type == FFELEX_typeNONE))
|
||
return; /* Don't have a statement pending. */
|
||
|
||
if (ffelex_token_->type != FFELEX_typeEOS)
|
||
ffelex_prepare_eos_ ();
|
||
|
||
ffelex_permit_include_ = TRUE;
|
||
ffelex_send_token_ ();
|
||
ffelex_permit_include_ = FALSE;
|
||
ffelex_number_of_tokens_ = 0;
|
||
ffelex_label_tokens_ = 0;
|
||
ffelex_names_ = TRUE;
|
||
ffelex_names_pure_ = FALSE; /* Probably not necessary. */
|
||
ffelex_hexnum_ = FALSE;
|
||
|
||
if (!ffe_is_ffedebug ())
|
||
return;
|
||
|
||
/* For debugging purposes only. */
|
||
|
||
if (ffelex_total_tokens_ != ffelex_old_total_tokens_)
|
||
{
|
||
fprintf (dmpout, "; token_track had %ld tokens, now have %ld.\n",
|
||
ffelex_old_total_tokens_, ffelex_total_tokens_);
|
||
ffelex_old_total_tokens_ = ffelex_total_tokens_;
|
||
}
|
||
}
|
||
|
||
/* Copied from gcc/c-common.c get_directive_line. */
|
||
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
static int
|
||
ffelex_get_directive_line_ (char **text, FILE *finput)
|
||
{
|
||
static char *directive_buffer = NULL;
|
||
static unsigned buffer_length = 0;
|
||
register char *p;
|
||
register char *buffer_limit;
|
||
register int looking_for = 0;
|
||
register int char_escaped = 0;
|
||
|
||
if (buffer_length == 0)
|
||
{
|
||
directive_buffer = (char *)xmalloc (128);
|
||
buffer_length = 128;
|
||
}
|
||
|
||
buffer_limit = &directive_buffer[buffer_length];
|
||
|
||
for (p = directive_buffer; ; )
|
||
{
|
||
int c;
|
||
|
||
/* Make buffer bigger if it is full. */
|
||
if (p >= buffer_limit)
|
||
{
|
||
register unsigned bytes_used = (p - directive_buffer);
|
||
|
||
buffer_length *= 2;
|
||
directive_buffer
|
||
= (char *)xrealloc (directive_buffer, buffer_length);
|
||
p = &directive_buffer[bytes_used];
|
||
buffer_limit = &directive_buffer[buffer_length];
|
||
}
|
||
|
||
c = getc (finput);
|
||
|
||
/* Discard initial whitespace. */
|
||
if ((c == ' ' || c == '\t') && p == directive_buffer)
|
||
continue;
|
||
|
||
/* Detect the end of the directive. */
|
||
if ((c == '\n' && looking_for == 0)
|
||
|| c == EOF)
|
||
{
|
||
if (looking_for != 0)
|
||
fatal ("Bad directive -- missing close-quote");
|
||
|
||
*p++ = '\0';
|
||
*text = directive_buffer;
|
||
return c;
|
||
}
|
||
|
||
*p++ = c;
|
||
if (c == '\n')
|
||
ffelex_next_line_ ();
|
||
|
||
/* Handle string and character constant syntax. */
|
||
if (looking_for)
|
||
{
|
||
if (looking_for == c && !char_escaped)
|
||
looking_for = 0; /* Found terminator... stop looking. */
|
||
}
|
||
else
|
||
if (c == '\'' || c == '"')
|
||
looking_for = c; /* Don't stop buffering until we see another
|
||
one of these (or an EOF). */
|
||
|
||
/* Handle backslash. */
|
||
char_escaped = (c == '\\' && ! char_escaped);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/* Handle # directives that make it through (or are generated by) the
|
||
preprocessor. As much as reasonably possible, emulate the behavior
|
||
of the gcc compiler phase cc1, though interactions between #include
|
||
and INCLUDE might possibly produce bizarre results in terms of
|
||
error reporting and the generation of debugging info vis-a-vis the
|
||
locations of some things.
|
||
|
||
Returns the next character unhandled, which is always newline or EOF. */
|
||
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
|
||
#if defined HANDLE_PRAGMA
|
||
/* Local versions of these macros, that can be passed as function pointers. */
|
||
static int
|
||
pragma_getc ()
|
||
{
|
||
return getc (finput);
|
||
}
|
||
|
||
static void
|
||
pragma_ungetc (arg)
|
||
int arg;
|
||
{
|
||
ungetc (arg, finput);
|
||
}
|
||
#endif /* HANDLE_PRAGMA */
|
||
|
||
static int
|
||
ffelex_hash_ (FILE *finput)
|
||
{
|
||
register int c;
|
||
ffelexToken token = NULL;
|
||
|
||
/* Read first nonwhite char after the `#'. */
|
||
|
||
c = ffelex_getc_ (finput);
|
||
while (c == ' ' || c == '\t')
|
||
c = ffelex_getc_ (finput);
|
||
|
||
/* If a letter follows, then if the word here is `line', skip
|
||
it and ignore it; otherwise, ignore the line, with an error
|
||
if the word isn't `pragma', `ident', `define', or `undef'. */
|
||
|
||
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
|
||
{
|
||
if (c == 'p')
|
||
{
|
||
if (getc (finput) == 'r'
|
||
&& getc (finput) == 'a'
|
||
&& getc (finput) == 'g'
|
||
&& getc (finput) == 'm'
|
||
&& getc (finput) == 'a'
|
||
&& ((c = getc (finput)) == ' ' || c == '\t' || c == '\n'
|
||
|| c == EOF))
|
||
{
|
||
#if 0 /* g77 doesn't handle pragmas, so ignores them FOR NOW. */
|
||
static char buffer [128];
|
||
char * buff = buffer;
|
||
|
||
/* Read the pragma name into a buffer. */
|
||
while (isspace (c = getc (finput)))
|
||
continue;
|
||
|
||
do
|
||
{
|
||
* buff ++ = c;
|
||
c = getc (finput);
|
||
}
|
||
while (c != EOF && ! isspace (c) && c != '\n'
|
||
&& buff < buffer + 128);
|
||
|
||
pragma_ungetc (c);
|
||
|
||
* -- buff = 0;
|
||
#ifdef HANDLE_PRAGMA
|
||
if (HANDLE_PRAGMA (pragma_getc, pragma_ungetc, buffer))
|
||
goto skipline;
|
||
#endif /* HANDLE_PRAGMA */
|
||
#ifdef HANDLE_GENERIC_PRAGMAS
|
||
if (handle_generic_pragma (buffer))
|
||
goto skipline;
|
||
#endif /* !HANDLE_GENERIC_PRAGMAS */
|
||
|
||
/* Issue a warning message if we have been asked to do so.
|
||
Ignoring unknown pragmas in system header file unless
|
||
an explcit -Wunknown-pragmas has been given. */
|
||
if (warn_unknown_pragmas > 1
|
||
|| (warn_unknown_pragmas && ! in_system_header))
|
||
warning ("ignoring pragma: %s", token_buffer);
|
||
#endif /* 0 */
|
||
goto skipline;
|
||
}
|
||
}
|
||
|
||
else if (c == 'd')
|
||
{
|
||
if (getc (finput) == 'e'
|
||
&& getc (finput) == 'f'
|
||
&& getc (finput) == 'i'
|
||
&& getc (finput) == 'n'
|
||
&& getc (finput) == 'e'
|
||
&& ((c = getc (finput)) == ' ' || c == '\t' || c == '\n'
|
||
|| c == EOF))
|
||
{
|
||
char *text;
|
||
|
||
c = ffelex_get_directive_line_ (&text, finput);
|
||
|
||
#ifdef DWARF_DEBUGGING_INFO
|
||
if ((debug_info_level == DINFO_LEVEL_VERBOSE)
|
||
&& (write_symbols == DWARF_DEBUG))
|
||
dwarfout_define (lineno, text);
|
||
#endif /* DWARF_DEBUGGING_INFO */
|
||
|
||
goto skipline;
|
||
}
|
||
}
|
||
else if (c == 'u')
|
||
{
|
||
if (getc (finput) == 'n'
|
||
&& getc (finput) == 'd'
|
||
&& getc (finput) == 'e'
|
||
&& getc (finput) == 'f'
|
||
&& ((c = getc (finput)) == ' ' || c == '\t' || c == '\n'
|
||
|| c == EOF))
|
||
{
|
||
char *text;
|
||
|
||
c = ffelex_get_directive_line_ (&text, finput);
|
||
|
||
#ifdef DWARF_DEBUGGING_INFO
|
||
if ((debug_info_level == DINFO_LEVEL_VERBOSE)
|
||
&& (write_symbols == DWARF_DEBUG))
|
||
dwarfout_undef (lineno, text);
|
||
#endif /* DWARF_DEBUGGING_INFO */
|
||
|
||
goto skipline;
|
||
}
|
||
}
|
||
else if (c == 'l')
|
||
{
|
||
if (getc (finput) == 'i'
|
||
&& getc (finput) == 'n'
|
||
&& getc (finput) == 'e'
|
||
&& ((c = getc (finput)) == ' ' || c == '\t'))
|
||
goto linenum;
|
||
}
|
||
else if (c == 'i')
|
||
{
|
||
if (getc (finput) == 'd'
|
||
&& getc (finput) == 'e'
|
||
&& getc (finput) == 'n'
|
||
&& getc (finput) == 't'
|
||
&& ((c = getc (finput)) == ' ' || c == '\t'))
|
||
{
|
||
/* #ident. The pedantic warning is now in cccp.c. */
|
||
|
||
/* Here we have just seen `#ident '.
|
||
A string constant should follow. */
|
||
|
||
while (c == ' ' || c == '\t')
|
||
c = getc (finput);
|
||
|
||
/* If no argument, ignore the line. */
|
||
if (c == '\n' || c == EOF)
|
||
return c;
|
||
|
||
c = ffelex_cfelex_ (&token, finput, c);
|
||
|
||
if ((token == NULL)
|
||
|| (ffelex_token_type (token) != FFELEX_typeCHARACTER))
|
||
{
|
||
error ("invalid #ident");
|
||
goto skipline;
|
||
}
|
||
|
||
if (! flag_no_ident)
|
||
{
|
||
#ifdef ASM_OUTPUT_IDENT
|
||
ASM_OUTPUT_IDENT (asm_out_file,
|
||
ffelex_token_text (token));
|
||
#endif
|
||
}
|
||
|
||
/* Skip the rest of this line. */
|
||
goto skipline;
|
||
}
|
||
}
|
||
|
||
error ("undefined or invalid # directive");
|
||
goto skipline;
|
||
}
|
||
|
||
linenum:
|
||
/* Here we have either `#line' or `# <nonletter>'.
|
||
In either case, it should be a line number; a digit should follow. */
|
||
|
||
while (c == ' ' || c == '\t')
|
||
c = ffelex_getc_ (finput);
|
||
|
||
/* If the # is the only nonwhite char on the line,
|
||
just ignore it. Check the new newline. */
|
||
if (c == '\n' || c == EOF)
|
||
return c;
|
||
|
||
/* Something follows the #; read a token. */
|
||
|
||
c = ffelex_cfelex_ (&token, finput, c);
|
||
|
||
if ((token != NULL)
|
||
&& (ffelex_token_type (token) == FFELEX_typeNUMBER))
|
||
{
|
||
int old_lineno = lineno;
|
||
char *old_input_filename = input_filename;
|
||
ffewhereFile wf;
|
||
|
||
/* subtract one, because it is the following line that
|
||
gets the specified number */
|
||
int l = atoi (ffelex_token_text (token)) - 1;
|
||
|
||
/* Is this the last nonwhite stuff on the line? */
|
||
while (c == ' ' || c == '\t')
|
||
c = ffelex_getc_ (finput);
|
||
if (c == '\n' || c == EOF)
|
||
{
|
||
/* No more: store the line number and check following line. */
|
||
lineno = l;
|
||
if (!ffelex_kludge_flag_)
|
||
{
|
||
ffewhere_file_set (NULL, TRUE, (ffewhereLineNumber) l);
|
||
|
||
if (token != NULL)
|
||
ffelex_token_kill (token);
|
||
}
|
||
return c;
|
||
}
|
||
|
||
/* More follows: it must be a string constant (filename). */
|
||
|
||
/* Read the string constant. */
|
||
c = ffelex_cfelex_ (&token, finput, c);
|
||
|
||
if ((token == NULL)
|
||
|| (ffelex_token_type (token) != FFELEX_typeCHARACTER))
|
||
{
|
||
error ("invalid #line");
|
||
goto skipline;
|
||
}
|
||
|
||
lineno = l;
|
||
|
||
if (ffelex_kludge_flag_)
|
||
input_filename = ffelex_token_text (token);
|
||
else
|
||
{
|
||
wf = ffewhere_file_new (ffelex_token_text (token),
|
||
ffelex_token_length (token));
|
||
input_filename = ffewhere_file_name (wf);
|
||
ffewhere_file_set (wf, TRUE, (ffewhereLineNumber) l);
|
||
}
|
||
|
||
#if 0 /* Not sure what g77 should do with this yet. */
|
||
/* Each change of file name
|
||
reinitializes whether we are now in a system header. */
|
||
in_system_header = 0;
|
||
#endif
|
||
|
||
if (main_input_filename == 0)
|
||
main_input_filename = input_filename;
|
||
|
||
/* Is this the last nonwhite stuff on the line? */
|
||
while (c == ' ' || c == '\t')
|
||
c = getc (finput);
|
||
if (c == '\n' || c == EOF)
|
||
{
|
||
if (!ffelex_kludge_flag_)
|
||
{
|
||
/* Update the name in the top element of input_file_stack. */
|
||
if (input_file_stack)
|
||
input_file_stack->name = input_filename;
|
||
|
||
if (token != NULL)
|
||
ffelex_token_kill (token);
|
||
}
|
||
return c;
|
||
}
|
||
|
||
c = ffelex_cfelex_ (&token, finput, c);
|
||
|
||
/* `1' after file name means entering new file.
|
||
`2' after file name means just left a file. */
|
||
|
||
if ((token != NULL)
|
||
&& (ffelex_token_type (token) == FFELEX_typeNUMBER))
|
||
{
|
||
int num = atoi (ffelex_token_text (token));
|
||
|
||
if (ffelex_kludge_flag_)
|
||
{
|
||
lineno = 1;
|
||
input_filename = old_input_filename;
|
||
fatal ("Use `#line ...' instead of `# ...' in first line");
|
||
}
|
||
|
||
if (num == 1)
|
||
{
|
||
/* Pushing to a new file. */
|
||
ffelex_file_push_ (old_lineno, input_filename);
|
||
}
|
||
else if (num == 2)
|
||
{
|
||
/* Popping out of a file. */
|
||
ffelex_file_pop_ (input_filename);
|
||
}
|
||
|
||
/* Is this the last nonwhite stuff on the line? */
|
||
while (c == ' ' || c == '\t')
|
||
c = getc (finput);
|
||
if (c == '\n' || c == EOF)
|
||
{
|
||
if (token != NULL)
|
||
ffelex_token_kill (token);
|
||
return c;
|
||
}
|
||
|
||
c = ffelex_cfelex_ (&token, finput, c);
|
||
}
|
||
|
||
/* `3' after file name means this is a system header file. */
|
||
|
||
#if 0 /* Not sure what g77 should do with this yet. */
|
||
if ((token != NULL)
|
||
&& (ffelex_token_type (token) == FFELEX_typeNUMBER)
|
||
&& (atoi (ffelex_token_text (token)) == 3))
|
||
in_system_header = 1;
|
||
#endif
|
||
|
||
while (c == ' ' || c == '\t')
|
||
c = getc (finput);
|
||
if (((token != NULL)
|
||
|| (c != '\n' && c != EOF))
|
||
&& ffelex_kludge_flag_)
|
||
{
|
||
lineno = 1;
|
||
input_filename = old_input_filename;
|
||
fatal ("Use `#line ...' instead of `# ...' in first line");
|
||
}
|
||
}
|
||
else
|
||
error ("invalid #-line");
|
||
|
||
/* skip the rest of this line. */
|
||
skipline:
|
||
if ((token != NULL) && !ffelex_kludge_flag_)
|
||
ffelex_token_kill (token);
|
||
while ((c = getc (finput)) != EOF && c != '\n')
|
||
;
|
||
return c;
|
||
}
|
||
#endif /* FFECOM_targetCURRENT == FFECOM_targetGCC */
|
||
|
||
/* "Image" a character onto the card image, return incremented column number.
|
||
|
||
Normally invoking this function as in
|
||
column = ffelex_image_char_ (c, column);
|
||
is the same as doing:
|
||
ffelex_card_image_[column++] = c;
|
||
|
||
However, tabs and carriage returns are handled specially, to preserve
|
||
the visual "image" of the input line (in most editors) in the card
|
||
image.
|
||
|
||
Carriage returns are ignored, as they are assumed to be followed
|
||
by newlines.
|
||
|
||
A tab is handled by first doing:
|
||
ffelex_card_image_[column++] = ' ';
|
||
That is, it translates to at least one space. Then, as many spaces
|
||
are imaged as necessary to bring the column number to the next tab
|
||
position, where tab positions start in the ninth column and each
|
||
eighth column afterwards. ALSO, a static var named ffelex_saw_tab_
|
||
is set to TRUE to notify the lexer that a tab was seen.
|
||
|
||
Columns are numbered and tab stops set as illustrated below:
|
||
|
||
012345670123456701234567...
|
||
x y z
|
||
xx yy zz
|
||
...
|
||
xxxxxxx yyyyyyy zzzzzzz
|
||
xxxxxxxx yyyyyyyy... */
|
||
|
||
static ffewhereColumnNumber
|
||
ffelex_image_char_ (int c, ffewhereColumnNumber column)
|
||
{
|
||
ffewhereColumnNumber old_column = column;
|
||
|
||
if (column >= ffelex_card_size_)
|
||
{
|
||
ffewhereColumnNumber newmax = ffelex_card_size_ << 1;
|
||
|
||
if (ffelex_bad_line_)
|
||
return column;
|
||
|
||
if ((newmax >> 1) != ffelex_card_size_)
|
||
{ /* Overflowed column number. */
|
||
overflow: /* :::::::::::::::::::: */
|
||
|
||
ffelex_bad_line_ = TRUE;
|
||
strcpy (&ffelex_card_image_[column - 3], "...");
|
||
ffelex_card_length_ = column;
|
||
ffelex_bad_1_ (FFEBAD_LINE_TOO_LONG,
|
||
ffelex_linecount_current_, column + 1);
|
||
return column;
|
||
}
|
||
|
||
ffelex_card_image_
|
||
= malloc_resize_ksr (malloc_pool_image (),
|
||
ffelex_card_image_,
|
||
newmax + 9,
|
||
ffelex_card_size_ + 9);
|
||
ffelex_card_size_ = newmax;
|
||
}
|
||
|
||
switch (c)
|
||
{
|
||
case '\r':
|
||
break;
|
||
|
||
case '\t':
|
||
ffelex_saw_tab_ = TRUE;
|
||
ffelex_card_image_[column++] = ' ';
|
||
while ((column & 7) != 0)
|
||
ffelex_card_image_[column++] = ' ';
|
||
break;
|
||
|
||
case '\0':
|
||
if (!ffelex_bad_line_)
|
||
{
|
||
ffelex_bad_line_ = TRUE;
|
||
strcpy (&ffelex_card_image_[column], "[\\0]");
|
||
ffelex_card_length_ = column + 4;
|
||
ffebad_start_msg_lex ("Null character at %0 -- line ignored",
|
||
FFEBAD_severityFATAL);
|
||
ffelex_bad_here_ (0, ffelex_linecount_current_, column + 1);
|
||
ffebad_finish ();
|
||
column += 4;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
ffelex_card_image_[column++] = c;
|
||
break;
|
||
}
|
||
|
||
if (column < old_column)
|
||
{
|
||
column = old_column;
|
||
goto overflow; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
return column;
|
||
}
|
||
|
||
static void
|
||
ffelex_include_ ()
|
||
{
|
||
ffewhereFile include_wherefile = ffelex_include_wherefile_;
|
||
FILE *include_file = ffelex_include_file_;
|
||
/* The rest of this is to push, and after the INCLUDE file is processed,
|
||
pop, the static lexer state info that pertains to each particular
|
||
input file. */
|
||
char *card_image;
|
||
ffewhereColumnNumber card_size = ffelex_card_size_;
|
||
ffewhereColumnNumber card_length = ffelex_card_length_;
|
||
ffewhereLine current_wl = ffelex_current_wl_;
|
||
ffewhereColumn current_wc = ffelex_current_wc_;
|
||
bool saw_tab = ffelex_saw_tab_;
|
||
ffewhereColumnNumber final_nontab_column = ffelex_final_nontab_column_;
|
||
ffewhereFile current_wf = ffelex_current_wf_;
|
||
ffewhereLineNumber linecount_current = ffelex_linecount_current_;
|
||
ffewhereLineNumber linecount_offset
|
||
= ffewhere_line_filelinenum (current_wl);
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
int old_lineno = lineno;
|
||
char *old_input_filename = input_filename;
|
||
#endif
|
||
|
||
if (card_length != 0)
|
||
{
|
||
card_image = malloc_new_ks (malloc_pool_image (),
|
||
"FFELEX saved card image",
|
||
card_length);
|
||
memcpy (card_image, ffelex_card_image_, card_length);
|
||
}
|
||
else
|
||
card_image = NULL;
|
||
|
||
ffelex_set_include_ = FALSE;
|
||
|
||
ffelex_next_line_ ();
|
||
|
||
ffewhere_file_set (include_wherefile, TRUE, 0);
|
||
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
ffelex_file_push_ (old_lineno, ffewhere_file_name (include_wherefile));
|
||
#endif /* FFECOM_targetCURRENT == FFECOM_targetGCC */
|
||
|
||
if (ffelex_include_free_form_)
|
||
ffelex_file_free (include_wherefile, include_file);
|
||
else
|
||
ffelex_file_fixed (include_wherefile, include_file);
|
||
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
ffelex_file_pop_ (ffewhere_file_name (current_wf));
|
||
#endif /* FFECOM_targetCURRENT == FFECOM_targetGCC */
|
||
|
||
ffewhere_file_set (current_wf, TRUE, linecount_offset);
|
||
|
||
ffecom_close_include (include_file);
|
||
|
||
if (card_length != 0)
|
||
{
|
||
#ifdef REDUCE_CARD_SIZE_AFTER_BIGGY /* Define if occasional large lines. */
|
||
#error "need to handle possible reduction of card size here!!"
|
||
#endif
|
||
assert (ffelex_card_size_ >= card_length); /* It shrunk?? */
|
||
memcpy (ffelex_card_image_, card_image, card_length);
|
||
}
|
||
ffelex_card_image_[card_length] = '\0';
|
||
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
input_filename = old_input_filename;
|
||
lineno = old_lineno;
|
||
#endif
|
||
ffelex_linecount_current_ = linecount_current;
|
||
ffelex_current_wf_ = current_wf;
|
||
ffelex_final_nontab_column_ = final_nontab_column;
|
||
ffelex_saw_tab_ = saw_tab;
|
||
ffelex_current_wc_ = current_wc;
|
||
ffelex_current_wl_ = current_wl;
|
||
ffelex_card_length_ = card_length;
|
||
ffelex_card_size_ = card_size;
|
||
}
|
||
|
||
/* ffelex_is_free_char_ctx_contin_ -- Character Context Continuation?
|
||
|
||
ffewhereColumnNumber col;
|
||
int c; // Char at col.
|
||
if ((c == '&') && ffelex_is_free_char_ctx_contin_(col + 1))
|
||
// We have a continuation indicator.
|
||
|
||
If there are <n> spaces starting at ffelex_card_image_[col] up through
|
||
the null character, where <n> is 0 or greater, returns TRUE. */
|
||
|
||
static bool
|
||
ffelex_is_free_char_ctx_contin_ (ffewhereColumnNumber col)
|
||
{
|
||
while (ffelex_card_image_[col] != '\0')
|
||
{
|
||
if (ffelex_card_image_[col++] != ' ')
|
||
return FALSE;
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
/* ffelex_is_free_nonc_ctx_contin_ -- Noncharacter Context Continuation?
|
||
|
||
ffewhereColumnNumber col;
|
||
int c; // Char at col.
|
||
if ((c == '&') && ffelex_is_free_nonc_ctx_contin_(col + 1))
|
||
// We have a continuation indicator.
|
||
|
||
If there are <n> spaces starting at ffelex_card_image_[col] up through
|
||
the null character or '!', where <n> is 0 or greater, returns TRUE. */
|
||
|
||
static bool
|
||
ffelex_is_free_nonc_ctx_contin_ (ffewhereColumnNumber col)
|
||
{
|
||
while ((ffelex_card_image_[col] != '\0') && (ffelex_card_image_[col] != '!'))
|
||
{
|
||
if (ffelex_card_image_[col++] != ' ')
|
||
return FALSE;
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
static void
|
||
ffelex_next_line_ ()
|
||
{
|
||
ffelex_linecount_current_ = ffelex_linecount_next_;
|
||
++ffelex_linecount_next_;
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
++lineno;
|
||
#endif
|
||
}
|
||
|
||
static void
|
||
ffelex_send_token_ ()
|
||
{
|
||
++ffelex_number_of_tokens_;
|
||
|
||
ffelex_backslash_ (EOF, 0);
|
||
|
||
if (ffelex_token_->text == NULL)
|
||
{
|
||
if (ffelex_token_->type == FFELEX_typeCHARACTER)
|
||
{
|
||
ffelex_append_to_token_ ('\0');
|
||
ffelex_token_->length = 0;
|
||
}
|
||
}
|
||
else
|
||
ffelex_token_->text[ffelex_token_->length] = '\0';
|
||
|
||
assert (ffelex_raw_mode_ == 0);
|
||
|
||
if (ffelex_token_->type == FFELEX_typeNAMES)
|
||
{
|
||
ffewhere_line_kill (ffelex_token_->currentnames_line);
|
||
ffewhere_column_kill (ffelex_token_->currentnames_col);
|
||
}
|
||
|
||
assert (ffelex_handler_ != NULL);
|
||
ffelex_handler_ = (ffelexHandler) (*ffelex_handler_) (ffelex_token_);
|
||
assert (ffelex_handler_ != NULL);
|
||
|
||
ffelex_token_kill (ffelex_token_);
|
||
|
||
ffelex_token_ = ffelex_token_new_ ();
|
||
ffelex_token_->uses = 1;
|
||
ffelex_token_->text = NULL;
|
||
if (ffelex_raw_mode_ < 0)
|
||
{
|
||
ffelex_token_->type = FFELEX_typeCHARACTER;
|
||
ffelex_token_->where_line = ffelex_raw_where_line_;
|
||
ffelex_token_->where_col = ffelex_raw_where_col_;
|
||
ffelex_raw_where_line_ = ffewhere_line_unknown ();
|
||
ffelex_raw_where_col_ = ffewhere_column_unknown ();
|
||
}
|
||
else
|
||
{
|
||
ffelex_token_->type = FFELEX_typeNONE;
|
||
ffelex_token_->where_line = ffewhere_line_unknown ();
|
||
ffelex_token_->where_col = ffewhere_column_unknown ();
|
||
}
|
||
|
||
if (ffelex_set_include_)
|
||
ffelex_include_ ();
|
||
}
|
||
|
||
/* ffelex_swallow_tokens_ -- Eat all tokens delivered to me
|
||
|
||
return ffelex_swallow_tokens_;
|
||
|
||
Return this handler when you don't want to look at any more tokens in the
|
||
statement because you've encountered an unrecoverable error in the
|
||
statement. */
|
||
|
||
static ffelexHandler
|
||
ffelex_swallow_tokens_ (ffelexToken t)
|
||
{
|
||
assert (ffelex_eos_handler_ != NULL);
|
||
|
||
if ((ffelex_token_type (t) == FFELEX_typeEOS)
|
||
|| (ffelex_token_type (t) == FFELEX_typeSEMICOLON))
|
||
return (ffelexHandler) (*ffelex_eos_handler_) (t);
|
||
|
||
return (ffelexHandler) ffelex_swallow_tokens_;
|
||
}
|
||
|
||
static ffelexToken
|
||
ffelex_token_new_ ()
|
||
{
|
||
ffelexToken t;
|
||
|
||
++ffelex_total_tokens_;
|
||
|
||
t = (ffelexToken) malloc_new_ks (malloc_pool_image (),
|
||
"FFELEX token", sizeof (*t));
|
||
t->id_ = ffelex_token_nextid_++;
|
||
return t;
|
||
}
|
||
|
||
static const char *
|
||
ffelex_type_string_ (ffelexType type)
|
||
{
|
||
static const char *types[] = {
|
||
"FFELEX_typeNONE",
|
||
"FFELEX_typeCOMMENT",
|
||
"FFELEX_typeEOS",
|
||
"FFELEX_typeEOF",
|
||
"FFELEX_typeERROR",
|
||
"FFELEX_typeRAW",
|
||
"FFELEX_typeQUOTE",
|
||
"FFELEX_typeDOLLAR",
|
||
"FFELEX_typeHASH",
|
||
"FFELEX_typePERCENT",
|
||
"FFELEX_typeAMPERSAND",
|
||
"FFELEX_typeAPOSTROPHE",
|
||
"FFELEX_typeOPEN_PAREN",
|
||
"FFELEX_typeCLOSE_PAREN",
|
||
"FFELEX_typeASTERISK",
|
||
"FFELEX_typePLUS",
|
||
"FFELEX_typeMINUS",
|
||
"FFELEX_typePERIOD",
|
||
"FFELEX_typeSLASH",
|
||
"FFELEX_typeNUMBER",
|
||
"FFELEX_typeOPEN_ANGLE",
|
||
"FFELEX_typeEQUALS",
|
||
"FFELEX_typeCLOSE_ANGLE",
|
||
"FFELEX_typeNAME",
|
||
"FFELEX_typeCOMMA",
|
||
"FFELEX_typePOWER",
|
||
"FFELEX_typeCONCAT",
|
||
"FFELEX_typeDEBUG",
|
||
"FFELEX_typeNAMES",
|
||
"FFELEX_typeHOLLERITH",
|
||
"FFELEX_typeCHARACTER",
|
||
"FFELEX_typeCOLON",
|
||
"FFELEX_typeSEMICOLON",
|
||
"FFELEX_typeUNDERSCORE",
|
||
"FFELEX_typeQUESTION",
|
||
"FFELEX_typeOPEN_ARRAY",
|
||
"FFELEX_typeCLOSE_ARRAY",
|
||
"FFELEX_typeCOLONCOLON",
|
||
"FFELEX_typeREL_LE",
|
||
"FFELEX_typeREL_NE",
|
||
"FFELEX_typeREL_EQ",
|
||
"FFELEX_typePOINTS",
|
||
"FFELEX_typeREL_GE"
|
||
};
|
||
|
||
if (type >= ARRAY_SIZE (types))
|
||
return "???";
|
||
return types[type];
|
||
}
|
||
|
||
void
|
||
ffelex_display_token (ffelexToken t)
|
||
{
|
||
if (t == NULL)
|
||
t = ffelex_token_;
|
||
|
||
fprintf (dmpout, "; Token #%lu is %s (line %" ffewhereLineNumber_f "u, col %"
|
||
ffewhereColumnNumber_f "u)",
|
||
t->id_,
|
||
ffelex_type_string_ (t->type),
|
||
ffewhere_line_number (t->where_line),
|
||
ffewhere_column_number (t->where_col));
|
||
|
||
if (t->text != NULL)
|
||
fprintf (dmpout, ": \"%.*s\"\n",
|
||
(int) t->length,
|
||
t->text);
|
||
else
|
||
fprintf (dmpout, ".\n");
|
||
}
|
||
|
||
/* ffelex_expecting_character -- Tells if next token expected to be CHARACTER
|
||
|
||
if (ffelex_expecting_character())
|
||
// next token delivered by lexer will be CHARACTER.
|
||
|
||
If the most recent call to ffelex_set_expecting_hollerith since the last
|
||
token was delivered by the lexer passed a length of -1, then we return
|
||
TRUE, because the next token we deliver will be typeCHARACTER, else we
|
||
return FALSE. */
|
||
|
||
bool
|
||
ffelex_expecting_character ()
|
||
{
|
||
return (ffelex_raw_mode_ != 0);
|
||
}
|
||
|
||
/* ffelex_file_fixed -- Lex a given file in fixed source form
|
||
|
||
ffewhere wf;
|
||
FILE *f;
|
||
ffelex_file_fixed(wf,f);
|
||
|
||
Lexes the file according to Fortran 90 ANSI + VXT specifications. */
|
||
|
||
ffelexHandler
|
||
ffelex_file_fixed (ffewhereFile wf, FILE *f)
|
||
{
|
||
register int c = 0; /* Character currently under consideration. */
|
||
register ffewhereColumnNumber column = 0; /* Not really; 0 means column 1... */
|
||
bool disallow_continuation_line;
|
||
bool ignore_disallowed_continuation = FALSE;
|
||
int latest_char_in_file = 0; /* For getting back into comment-skipping
|
||
code. */
|
||
ffelexType lextype;
|
||
ffewhereColumnNumber first_label_char; /* First char of label --
|
||
column number. */
|
||
char label_string[6]; /* Text of label. */
|
||
int labi; /* Length of label text. */
|
||
bool finish_statement; /* Previous statement finished? */
|
||
bool have_content; /* This line have content? */
|
||
bool just_do_label; /* Nothing but label (and continuation?) on
|
||
line. */
|
||
|
||
/* Lex is called for a particular file, not for a particular program unit.
|
||
Yet the two events do share common characteristics. The first line in a
|
||
file or in a program unit cannot be a continuation line. No token can
|
||
be in mid-formation. No current label for the statement exists, since
|
||
there is no current statement. */
|
||
|
||
assert (ffelex_handler_ != NULL);
|
||
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
lineno = 0;
|
||
input_filename = ffewhere_file_name (wf);
|
||
#endif
|
||
ffelex_current_wf_ = wf;
|
||
disallow_continuation_line = TRUE;
|
||
ignore_disallowed_continuation = FALSE;
|
||
ffelex_token_->type = FFELEX_typeNONE;
|
||
ffelex_number_of_tokens_ = 0;
|
||
ffelex_label_tokens_ = 0;
|
||
ffelex_current_wl_ = ffewhere_line_unknown ();
|
||
ffelex_current_wc_ = ffewhere_column_unknown ();
|
||
latest_char_in_file = '\n';
|
||
|
||
if (ffe_is_null_version ())
|
||
{
|
||
/* Just substitute a "program" directly here. */
|
||
|
||
char line[] = " call g77__fvers;call g77__ivers;call g77__uvers;end";
|
||
char *p;
|
||
|
||
column = 0;
|
||
for (p = &line[0]; *p != '\0'; ++p)
|
||
column = ffelex_image_char_ (*p, column);
|
||
|
||
c = EOF;
|
||
|
||
goto have_line; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
goto first_line; /* :::::::::::::::::::: */
|
||
|
||
/* Come here to get a new line. */
|
||
|
||
beginning_of_line: /* :::::::::::::::::::: */
|
||
|
||
disallow_continuation_line = FALSE;
|
||
|
||
/* Come here directly when last line didn't clarify the continuation issue. */
|
||
|
||
beginning_of_line_again: /* :::::::::::::::::::: */
|
||
|
||
#ifdef REDUCE_CARD_SIZE_AFTER_BIGGY /* Define if occasional large lines. */
|
||
if (ffelex_card_size_ != FFELEX_columnINITIAL_SIZE_)
|
||
{
|
||
ffelex_card_image_
|
||
= malloc_resize_ks (malloc_pool_image (),
|
||
ffelex_card_image_,
|
||
FFELEX_columnINITIAL_SIZE_ + 9,
|
||
ffelex_card_size_ + 9);
|
||
ffelex_card_size_ = FFELEX_columnINITIAL_SIZE_;
|
||
}
|
||
#endif
|
||
|
||
first_line: /* :::::::::::::::::::: */
|
||
|
||
c = latest_char_in_file;
|
||
if ((c == EOF) || ((c = ffelex_getc_ (f)) == EOF))
|
||
{
|
||
|
||
end_of_file: /* :::::::::::::::::::: */
|
||
|
||
/* Line ending in EOF instead of \n still counts as a whole line. */
|
||
|
||
ffelex_finish_statement_ ();
|
||
ffewhere_line_kill (ffelex_current_wl_);
|
||
ffewhere_column_kill (ffelex_current_wc_);
|
||
return (ffelexHandler) ffelex_handler_;
|
||
}
|
||
|
||
ffelex_next_line_ ();
|
||
|
||
ffelex_bad_line_ = FALSE;
|
||
|
||
/* Skip over comment (and otherwise ignored) lines as quickly as possible! */
|
||
|
||
while (((lextype = ffelex_first_char_[c]) == FFELEX_typeCOMMENT)
|
||
|| (lextype == FFELEX_typeERROR)
|
||
|| (lextype == FFELEX_typeSLASH)
|
||
|| (lextype == FFELEX_typeHASH))
|
||
{
|
||
/* Test most frequent type of line first, etc. */
|
||
if ((lextype == FFELEX_typeCOMMENT)
|
||
|| ((lextype == FFELEX_typeSLASH)
|
||
&& ((c = getc (f)) == '*'))) /* NOTE SIDE-EFFECT. */
|
||
{
|
||
/* Typical case (straight comment), just ignore rest of line. */
|
||
comment_line: /* :::::::::::::::::::: */
|
||
|
||
while ((c != '\n') && (c != EOF))
|
||
c = getc (f);
|
||
}
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
else if (lextype == FFELEX_typeHASH)
|
||
c = ffelex_hash_ (f);
|
||
#endif
|
||
else if (lextype == FFELEX_typeSLASH)
|
||
{
|
||
/* SIDE-EFFECT ABOVE HAS HAPPENED. */
|
||
ffelex_card_image_[0] = '/';
|
||
ffelex_card_image_[1] = c;
|
||
column = 2;
|
||
goto bad_first_character; /* :::::::::::::::::::: */
|
||
}
|
||
else
|
||
/* typeERROR or unsupported typeHASH. */
|
||
{ /* Bad first character, get line and display
|
||
it with message. */
|
||
column = ffelex_image_char_ (c, 0);
|
||
|
||
bad_first_character: /* :::::::::::::::::::: */
|
||
|
||
ffelex_bad_line_ = TRUE;
|
||
while (((c = getc (f)) != '\n') && (c != EOF))
|
||
column = ffelex_image_char_ (c, column);
|
||
ffelex_card_image_[column] = '\0';
|
||
ffelex_card_length_ = column;
|
||
ffelex_bad_1_ (FFEBAD_FIRST_CHAR_INVALID,
|
||
ffelex_linecount_current_, 1);
|
||
}
|
||
|
||
/* Read past last char in line. */
|
||
|
||
if (c == EOF)
|
||
{
|
||
ffelex_next_line_ ();
|
||
goto end_of_file; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
c = getc (f);
|
||
|
||
ffelex_next_line_ ();
|
||
|
||
if (c == EOF)
|
||
goto end_of_file; /* :::::::::::::::::::: */
|
||
|
||
ffelex_bad_line_ = FALSE;
|
||
} /* while [c, first char, means comment] */
|
||
|
||
ffelex_saw_tab_
|
||
= (c == '&')
|
||
|| (ffelex_final_nontab_column_ == 0);
|
||
|
||
if (lextype == FFELEX_typeDEBUG)
|
||
c = ' '; /* A 'D' or 'd' in column 1 with the
|
||
debug-lines option on. */
|
||
|
||
column = ffelex_image_char_ (c, 0);
|
||
|
||
/* Read the entire line in as is (with whitespace processing). */
|
||
|
||
while (((c = getc (f)) != '\n') && (c != EOF))
|
||
column = ffelex_image_char_ (c, column);
|
||
|
||
if (ffelex_bad_line_)
|
||
{
|
||
ffelex_card_image_[column] = '\0';
|
||
ffelex_card_length_ = column;
|
||
goto comment_line; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
/* If no tab, cut off line after column 72/132. */
|
||
|
||
if (!ffelex_saw_tab_ && (column > ffelex_final_nontab_column_))
|
||
{
|
||
/* Technically, we should now fill ffelex_card_image_ up thru column
|
||
72/132 with spaces, since character/hollerith constants must count
|
||
them in that manner. To save CPU time in several ways (avoid a loop
|
||
here that would be used only when we actually end a line in
|
||
character-constant mode; avoid writing memory unnecessarily; avoid a
|
||
loop later checking spaces when not scanning for character-constant
|
||
characters), we don't do this, and we do the appropriate thing when
|
||
we encounter end-of-line while actually processing a character
|
||
constant. */
|
||
|
||
column = ffelex_final_nontab_column_;
|
||
}
|
||
|
||
have_line: /* :::::::::::::::::::: */
|
||
|
||
ffelex_card_image_[column] = '\0';
|
||
ffelex_card_length_ = column;
|
||
|
||
/* Save next char in file so we can use register-based c while analyzing
|
||
line we just read. */
|
||
|
||
latest_char_in_file = c; /* Should be either '\n' or EOF. */
|
||
|
||
have_content = FALSE;
|
||
|
||
/* Handle label, if any. */
|
||
|
||
labi = 0;
|
||
first_label_char = FFEWHERE_columnUNKNOWN;
|
||
for (column = 0; column < 5; ++column)
|
||
{
|
||
switch (c = ffelex_card_image_[column])
|
||
{
|
||
case '\0':
|
||
case '!':
|
||
goto stop_looking; /* :::::::::::::::::::: */
|
||
|
||
case ' ':
|
||
break;
|
||
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
label_string[labi++] = c;
|
||
if (first_label_char == FFEWHERE_columnUNKNOWN)
|
||
first_label_char = column + 1;
|
||
break;
|
||
|
||
case '&':
|
||
if (column != 0)
|
||
{
|
||
ffelex_bad_1_ (FFEBAD_LABEL_FIELD_NOT_NUMERIC,
|
||
ffelex_linecount_current_,
|
||
column + 1);
|
||
goto beginning_of_line_again; /* :::::::::::::::::::: */
|
||
}
|
||
if (ffe_is_pedantic ())
|
||
ffelex_bad_1_ (FFEBAD_AMPERSAND,
|
||
ffelex_linecount_current_, 1);
|
||
finish_statement = FALSE;
|
||
just_do_label = FALSE;
|
||
goto got_a_continuation; /* :::::::::::::::::::: */
|
||
|
||
case '/':
|
||
if (ffelex_card_image_[column + 1] == '*')
|
||
goto stop_looking; /* :::::::::::::::::::: */
|
||
/* Fall through. */
|
||
default:
|
||
ffelex_bad_1_ (FFEBAD_LABEL_FIELD_NOT_NUMERIC,
|
||
ffelex_linecount_current_, column + 1);
|
||
goto beginning_of_line_again; /* :::::::::::::::::::: */
|
||
}
|
||
}
|
||
|
||
stop_looking: /* :::::::::::::::::::: */
|
||
|
||
label_string[labi] = '\0';
|
||
|
||
/* Find first nonblank char starting with continuation column. */
|
||
|
||
if (column == 5) /* In which case we didn't see end of line in
|
||
label field. */
|
||
while ((c = ffelex_card_image_[column]) == ' ')
|
||
++column;
|
||
|
||
/* Now we're trying to figure out whether this is a continuation line and
|
||
whether there's anything else of substance on the line. The cases are
|
||
as follows:
|
||
|
||
1. If a line has an explicit continuation character (other than the digit
|
||
zero), then if it also has a label, the label is ignored and an error
|
||
message is printed. Any remaining text on the line is passed to the
|
||
parser tasks, thus even an all-blank line (possibly with an ignored
|
||
label) aside from a positive continuation character might have meaning
|
||
in the midst of a character or hollerith constant.
|
||
|
||
2. If a line has no explicit continuation character (that is, it has a
|
||
space in column 6 and the first non-space character past column 6 is
|
||
not a digit 0-9), then there are two possibilities:
|
||
|
||
A. A label is present and/or a non-space (and non-comment) character
|
||
appears somewhere after column 6. Terminate processing of the previous
|
||
statement, if any, send the new label for the next statement, if any,
|
||
and start processing a new statement with this non-blank character, if
|
||
any.
|
||
|
||
B. The line is essentially blank, except for a possible comment character.
|
||
Don't terminate processing of the previous statement and don't pass any
|
||
characters to the parser tasks, since the line is not flagged as a
|
||
continuation line. We treat it just like a completely blank line.
|
||
|
||
3. If a line has a continuation character of zero (0), then we terminate
|
||
processing of the previous statement, if any, send the new label for the
|
||
next statement, if any, and start processing a new statement, if any
|
||
non-blank characters are present.
|
||
|
||
If, when checking to see if we should terminate the previous statement, it
|
||
is found that there is no previous statement but that there is an
|
||
outstanding label, substitute CONTINUE as the statement for the label
|
||
and display an error message. */
|
||
|
||
finish_statement = FALSE;
|
||
just_do_label = FALSE;
|
||
|
||
switch (c)
|
||
{
|
||
case '!': /* ANSI Fortran 90 says ! in column 6 is
|
||
continuation. */
|
||
/* VXT Fortran says ! anywhere is comment, even column 6. */
|
||
if (ffe_is_vxt () || (column != 5))
|
||
goto no_tokens_on_line; /* :::::::::::::::::::: */
|
||
goto got_a_continuation; /* :::::::::::::::::::: */
|
||
|
||
case '/':
|
||
if (ffelex_card_image_[column + 1] != '*')
|
||
goto some_other_character; /* :::::::::::::::::::: */
|
||
/* Fall through. */
|
||
if (column == 5)
|
||
{
|
||
/* This seems right to do. But it is close to call, since / * starting
|
||
in column 6 will thus be interpreted as a continuation line
|
||
beginning with '*'. */
|
||
|
||
goto got_a_continuation;/* :::::::::::::::::::: */
|
||
}
|
||
/* Fall through. */
|
||
case '\0':
|
||
/* End of line. Therefore may be continued-through line, so handle
|
||
pending label as possible to-be-continued and drive end-of-statement
|
||
for any previous statement, else treat as blank line. */
|
||
|
||
no_tokens_on_line: /* :::::::::::::::::::: */
|
||
|
||
if (ffe_is_pedantic () && (c == '/'))
|
||
ffelex_bad_1_ (FFEBAD_NON_ANSI_COMMENT,
|
||
ffelex_linecount_current_, column + 1);
|
||
if (first_label_char != FFEWHERE_columnUNKNOWN)
|
||
{ /* Can't be a continued-through line if it
|
||
has a label. */
|
||
finish_statement = TRUE;
|
||
have_content = TRUE;
|
||
just_do_label = TRUE;
|
||
break;
|
||
}
|
||
goto beginning_of_line_again; /* :::::::::::::::::::: */
|
||
|
||
case '0':
|
||
if (ffe_is_pedantic () && (column != 5))
|
||
ffelex_bad_1_ (FFEBAD_NON_ANSI_CONTINUATION_COLUMN,
|
||
ffelex_linecount_current_, column + 1);
|
||
finish_statement = TRUE;
|
||
goto check_for_content; /* :::::::::::::::::::: */
|
||
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
|
||
/* NOTE: This label can be reached directly from the code
|
||
that lexes the label field in columns 1-5. */
|
||
got_a_continuation: /* :::::::::::::::::::: */
|
||
|
||
if (first_label_char != FFEWHERE_columnUNKNOWN)
|
||
{
|
||
ffelex_bad_2_ (FFEBAD_LABEL_ON_CONTINUATION,
|
||
ffelex_linecount_current_,
|
||
first_label_char,
|
||
ffelex_linecount_current_,
|
||
column + 1);
|
||
first_label_char = FFEWHERE_columnUNKNOWN;
|
||
}
|
||
if (disallow_continuation_line)
|
||
{
|
||
if (!ignore_disallowed_continuation)
|
||
ffelex_bad_1_ (FFEBAD_INVALID_CONTINUATION,
|
||
ffelex_linecount_current_, column + 1);
|
||
goto beginning_of_line_again; /* :::::::::::::::::::: */
|
||
}
|
||
if (ffe_is_pedantic () && (column != 5))
|
||
ffelex_bad_1_ (FFEBAD_NON_ANSI_CONTINUATION_COLUMN,
|
||
ffelex_linecount_current_, column + 1);
|
||
if ((ffelex_raw_mode_ != 0)
|
||
&& (((c = ffelex_card_image_[column + 1]) != '\0')
|
||
|| !ffelex_saw_tab_))
|
||
{
|
||
++column;
|
||
have_content = TRUE;
|
||
break;
|
||
}
|
||
|
||
check_for_content: /* :::::::::::::::::::: */
|
||
|
||
while ((c = ffelex_card_image_[++column]) == ' ')
|
||
;
|
||
if ((c == '\0')
|
||
|| (c == '!')
|
||
|| ((c == '/')
|
||
&& (ffelex_card_image_[column + 1] == '*')))
|
||
{
|
||
if (ffe_is_pedantic () && (c == '/'))
|
||
ffelex_bad_1_ (FFEBAD_NON_ANSI_COMMENT,
|
||
ffelex_linecount_current_, column + 1);
|
||
just_do_label = TRUE;
|
||
}
|
||
else
|
||
have_content = TRUE;
|
||
break;
|
||
|
||
default:
|
||
|
||
some_other_character: /* :::::::::::::::::::: */
|
||
|
||
if (column == 5)
|
||
goto got_a_continuation;/* :::::::::::::::::::: */
|
||
|
||
/* Here is the very normal case of a regular character starting in
|
||
column 7 or beyond with a blank in column 6. */
|
||
|
||
finish_statement = TRUE;
|
||
have_content = TRUE;
|
||
break;
|
||
}
|
||
|
||
if (have_content
|
||
|| (first_label_char != FFEWHERE_columnUNKNOWN))
|
||
{
|
||
/* The line has content of some kind, install new end-statement
|
||
point for error messages. Note that "content" includes cases
|
||
where there's little apparent content but enough to finish
|
||
a statement. That's because finishing a statement can trigger
|
||
an impending INCLUDE, and that requires accurate line info being
|
||
maintained by the lexer. */
|
||
|
||
if (finish_statement)
|
||
ffelex_prepare_eos_ (); /* Prepare EOS before we move current pointer. */
|
||
|
||
ffewhere_line_kill (ffelex_current_wl_);
|
||
ffewhere_column_kill (ffelex_current_wc_);
|
||
ffelex_current_wl_ = ffewhere_line_new (ffelex_linecount_current_);
|
||
ffelex_current_wc_ = ffewhere_column_new (ffelex_card_length_ + 1);
|
||
}
|
||
|
||
/* We delay this for a combination of reasons. Mainly, it can start
|
||
INCLUDE processing, and we want to delay that until the lexer's
|
||
info on the line is coherent. And we want to delay that until we're
|
||
sure there's a reason to make that info coherent, to avoid saving
|
||
lots of useless lines. */
|
||
|
||
if (finish_statement)
|
||
ffelex_finish_statement_ ();
|
||
|
||
/* If label is present, enclose it in a NUMBER token and send it along. */
|
||
|
||
if (first_label_char != FFEWHERE_columnUNKNOWN)
|
||
{
|
||
assert (ffelex_token_->type == FFELEX_typeNONE);
|
||
ffelex_token_->type = FFELEX_typeNUMBER;
|
||
ffelex_append_to_token_ ('\0'); /* Make room for label text. */
|
||
strcpy (ffelex_token_->text, label_string);
|
||
ffelex_token_->where_line
|
||
= ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (first_label_char);
|
||
ffelex_token_->length = labi;
|
||
ffelex_send_token_ ();
|
||
++ffelex_label_tokens_;
|
||
}
|
||
|
||
if (just_do_label)
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
|
||
/* Here is the main engine for parsing. c holds the character at column.
|
||
It is already known that c is not a blank, end of line, or shriek,
|
||
unless ffelex_raw_mode_ is not 0 (indicating we are in a
|
||
character/hollerith constant). A partially filled token may already
|
||
exist in ffelex_token_. One special case: if, when the end of the line
|
||
is reached, continuation_line is FALSE and the only token on the line is
|
||
END, then it is indeed the last statement. We don't look for
|
||
continuation lines during this program unit in that case. This is
|
||
according to ANSI. */
|
||
|
||
if (ffelex_raw_mode_ != 0)
|
||
{
|
||
|
||
parse_raw_character: /* :::::::::::::::::::: */
|
||
|
||
if (c == '\0')
|
||
{
|
||
ffewhereColumnNumber i;
|
||
|
||
if (ffelex_saw_tab_ || (column >= ffelex_final_nontab_column_))
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
|
||
/* Pad out line with "virtual" spaces. */
|
||
|
||
for (i = column; i < ffelex_final_nontab_column_; ++i)
|
||
ffelex_card_image_[i] = ' ';
|
||
ffelex_card_image_[i] = '\0';
|
||
ffelex_card_length_ = i;
|
||
c = ' ';
|
||
}
|
||
|
||
switch (ffelex_raw_mode_)
|
||
{
|
||
case -3:
|
||
c = ffelex_backslash_ (c, column);
|
||
if (c == EOF)
|
||
break;
|
||
|
||
if (!ffelex_backslash_reconsider_)
|
||
ffelex_append_to_token_ (c);
|
||
ffelex_raw_mode_ = -1;
|
||
break;
|
||
|
||
case -2:
|
||
if (c == ffelex_raw_char_)
|
||
{
|
||
ffelex_raw_mode_ = -1;
|
||
ffelex_append_to_token_ (c);
|
||
}
|
||
else
|
||
{
|
||
ffelex_raw_mode_ = 0;
|
||
ffelex_backslash_reconsider_ = TRUE;
|
||
}
|
||
break;
|
||
|
||
case -1:
|
||
if (c == ffelex_raw_char_)
|
||
ffelex_raw_mode_ = -2;
|
||
else
|
||
{
|
||
c = ffelex_backslash_ (c, column);
|
||
if (c == EOF)
|
||
{
|
||
ffelex_raw_mode_ = -3;
|
||
break;
|
||
}
|
||
|
||
ffelex_append_to_token_ (c);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
c = ffelex_backslash_ (c, column);
|
||
if (c == EOF)
|
||
break;
|
||
|
||
if (!ffelex_backslash_reconsider_)
|
||
{
|
||
ffelex_append_to_token_ (c);
|
||
--ffelex_raw_mode_;
|
||
}
|
||
break;
|
||
}
|
||
|
||
if (ffelex_backslash_reconsider_)
|
||
ffelex_backslash_reconsider_ = FALSE;
|
||
else
|
||
c = ffelex_card_image_[++column];
|
||
|
||
if (ffelex_raw_mode_ == 0)
|
||
{
|
||
ffelex_send_token_ ();
|
||
assert (ffelex_raw_mode_ == 0);
|
||
while (c == ' ')
|
||
c = ffelex_card_image_[++column];
|
||
if ((c == '\0')
|
||
|| (c == '!')
|
||
|| ((c == '/')
|
||
&& (ffelex_card_image_[column + 1] == '*')))
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
goto parse_nonraw_character; /* :::::::::::::::::::: */
|
||
}
|
||
goto parse_raw_character; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
parse_nonraw_character: /* :::::::::::::::::::: */
|
||
|
||
switch (ffelex_token_->type)
|
||
{
|
||
case FFELEX_typeNONE:
|
||
switch (c)
|
||
{
|
||
case '\"':
|
||
ffelex_token_->type = FFELEX_typeQUOTE;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '$':
|
||
ffelex_token_->type = FFELEX_typeDOLLAR;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '%':
|
||
ffelex_token_->type = FFELEX_typePERCENT;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '&':
|
||
ffelex_token_->type = FFELEX_typeAMPERSAND;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '\'':
|
||
ffelex_token_->type = FFELEX_typeAPOSTROPHE;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '(':
|
||
ffelex_token_->type = FFELEX_typeOPEN_PAREN;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case ')':
|
||
ffelex_token_->type = FFELEX_typeCLOSE_PAREN;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '*':
|
||
ffelex_token_->type = FFELEX_typeASTERISK;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case '+':
|
||
ffelex_token_->type = FFELEX_typePLUS;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case ',':
|
||
ffelex_token_->type = FFELEX_typeCOMMA;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '-':
|
||
ffelex_token_->type = FFELEX_typeMINUS;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '.':
|
||
ffelex_token_->type = FFELEX_typePERIOD;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '/':
|
||
ffelex_token_->type = FFELEX_typeSLASH;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
ffelex_token_->type
|
||
= ffelex_hexnum_ ? FFELEX_typeNAME : FFELEX_typeNUMBER;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_append_to_token_ (c);
|
||
break;
|
||
|
||
case ':':
|
||
ffelex_token_->type = FFELEX_typeCOLON;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case ';':
|
||
ffelex_token_->type = FFELEX_typeSEMICOLON;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_permit_include_ = TRUE;
|
||
ffelex_send_token_ ();
|
||
ffelex_permit_include_ = FALSE;
|
||
break;
|
||
|
||
case '<':
|
||
ffelex_token_->type = FFELEX_typeOPEN_ANGLE;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case '=':
|
||
ffelex_token_->type = FFELEX_typeEQUALS;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case '>':
|
||
ffelex_token_->type = FFELEX_typeCLOSE_ANGLE;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case '?':
|
||
ffelex_token_->type = FFELEX_typeQUESTION;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '_':
|
||
if (1 || ffe_is_90 ())
|
||
{
|
||
ffelex_token_->type = FFELEX_typeUNDERSCORE;
|
||
ffelex_token_->where_line
|
||
= ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col
|
||
= ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
}
|
||
/* Fall through. */
|
||
case 'A':
|
||
case 'B':
|
||
case 'C':
|
||
case 'D':
|
||
case 'E':
|
||
case 'F':
|
||
case 'G':
|
||
case 'H':
|
||
case 'I':
|
||
case 'J':
|
||
case 'K':
|
||
case 'L':
|
||
case 'M':
|
||
case 'N':
|
||
case 'O':
|
||
case 'P':
|
||
case 'Q':
|
||
case 'R':
|
||
case 'S':
|
||
case 'T':
|
||
case 'U':
|
||
case 'V':
|
||
case 'W':
|
||
case 'X':
|
||
case 'Y':
|
||
case 'Z':
|
||
case 'a':
|
||
case 'b':
|
||
case 'c':
|
||
case 'd':
|
||
case 'e':
|
||
case 'f':
|
||
case 'g':
|
||
case 'h':
|
||
case 'i':
|
||
case 'j':
|
||
case 'k':
|
||
case 'l':
|
||
case 'm':
|
||
case 'n':
|
||
case 'o':
|
||
case 'p':
|
||
case 'q':
|
||
case 'r':
|
||
case 's':
|
||
case 't':
|
||
case 'u':
|
||
case 'v':
|
||
case 'w':
|
||
case 'x':
|
||
case 'y':
|
||
case 'z':
|
||
c = ffesrc_char_source (c);
|
||
|
||
if (ffesrc_char_match_init (c, 'H', 'h')
|
||
&& ffelex_expecting_hollerith_ != 0)
|
||
{
|
||
ffelex_raw_mode_ = ffelex_expecting_hollerith_;
|
||
ffelex_token_->type = FFELEX_typeHOLLERITH;
|
||
ffelex_token_->where_line = ffelex_raw_where_line_;
|
||
ffelex_token_->where_col = ffelex_raw_where_col_;
|
||
ffelex_raw_where_line_ = ffewhere_line_unknown ();
|
||
ffelex_raw_where_col_ = ffewhere_column_unknown ();
|
||
c = ffelex_card_image_[++column];
|
||
goto parse_raw_character; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
if (ffelex_names_)
|
||
{
|
||
ffelex_token_->where_line
|
||
= ffewhere_line_use (ffelex_token_->currentnames_line
|
||
= ffewhere_line_use (ffelex_current_wl_));
|
||
ffelex_token_->where_col
|
||
= ffewhere_column_use (ffelex_token_->currentnames_col
|
||
= ffewhere_column_new (column + 1));
|
||
ffelex_token_->type = FFELEX_typeNAMES;
|
||
}
|
||
else
|
||
{
|
||
ffelex_token_->where_line
|
||
= ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_token_->type = FFELEX_typeNAME;
|
||
}
|
||
ffelex_append_to_token_ (c);
|
||
break;
|
||
|
||
default:
|
||
ffelex_bad_1_ (FFEBAD_UNRECOGNIZED_CHARACTER,
|
||
ffelex_linecount_current_, column + 1);
|
||
ffelex_finish_statement_ ();
|
||
disallow_continuation_line = TRUE;
|
||
ignore_disallowed_continuation = TRUE;
|
||
goto beginning_of_line_again; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeNAME:
|
||
switch (c)
|
||
{
|
||
case 'A':
|
||
case 'B':
|
||
case 'C':
|
||
case 'D':
|
||
case 'E':
|
||
case 'F':
|
||
case 'G':
|
||
case 'H':
|
||
case 'I':
|
||
case 'J':
|
||
case 'K':
|
||
case 'L':
|
||
case 'M':
|
||
case 'N':
|
||
case 'O':
|
||
case 'P':
|
||
case 'Q':
|
||
case 'R':
|
||
case 'S':
|
||
case 'T':
|
||
case 'U':
|
||
case 'V':
|
||
case 'W':
|
||
case 'X':
|
||
case 'Y':
|
||
case 'Z':
|
||
case 'a':
|
||
case 'b':
|
||
case 'c':
|
||
case 'd':
|
||
case 'e':
|
||
case 'f':
|
||
case 'g':
|
||
case 'h':
|
||
case 'i':
|
||
case 'j':
|
||
case 'k':
|
||
case 'l':
|
||
case 'm':
|
||
case 'n':
|
||
case 'o':
|
||
case 'p':
|
||
case 'q':
|
||
case 'r':
|
||
case 's':
|
||
case 't':
|
||
case 'u':
|
||
case 'v':
|
||
case 'w':
|
||
case 'x':
|
||
case 'y':
|
||
case 'z':
|
||
c = ffesrc_char_source (c);
|
||
/* Fall through. */
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
case '_':
|
||
case '$':
|
||
if ((c == '$')
|
||
&& !ffe_is_dollar_ok ())
|
||
{
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
ffelex_append_to_token_ (c);
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeNAMES:
|
||
switch (c)
|
||
{
|
||
case 'A':
|
||
case 'B':
|
||
case 'C':
|
||
case 'D':
|
||
case 'E':
|
||
case 'F':
|
||
case 'G':
|
||
case 'H':
|
||
case 'I':
|
||
case 'J':
|
||
case 'K':
|
||
case 'L':
|
||
case 'M':
|
||
case 'N':
|
||
case 'O':
|
||
case 'P':
|
||
case 'Q':
|
||
case 'R':
|
||
case 'S':
|
||
case 'T':
|
||
case 'U':
|
||
case 'V':
|
||
case 'W':
|
||
case 'X':
|
||
case 'Y':
|
||
case 'Z':
|
||
case 'a':
|
||
case 'b':
|
||
case 'c':
|
||
case 'd':
|
||
case 'e':
|
||
case 'f':
|
||
case 'g':
|
||
case 'h':
|
||
case 'i':
|
||
case 'j':
|
||
case 'k':
|
||
case 'l':
|
||
case 'm':
|
||
case 'n':
|
||
case 'o':
|
||
case 'p':
|
||
case 'q':
|
||
case 'r':
|
||
case 's':
|
||
case 't':
|
||
case 'u':
|
||
case 'v':
|
||
case 'w':
|
||
case 'x':
|
||
case 'y':
|
||
case 'z':
|
||
c = ffesrc_char_source (c);
|
||
/* Fall through. */
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
case '_':
|
||
case '$':
|
||
if ((c == '$')
|
||
&& !ffe_is_dollar_ok ())
|
||
{
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
if (ffelex_token_->length < FFEWHERE_indexMAX)
|
||
{
|
||
ffewhere_track (&ffelex_token_->currentnames_line,
|
||
&ffelex_token_->currentnames_col,
|
||
ffelex_token_->wheretrack,
|
||
ffelex_token_->length,
|
||
ffelex_linecount_current_,
|
||
column + 1);
|
||
}
|
||
ffelex_append_to_token_ (c);
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeNUMBER:
|
||
switch (c)
|
||
{
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
ffelex_append_to_token_ (c);
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeASTERISK:
|
||
switch (c)
|
||
{
|
||
case '*': /* ** */
|
||
ffelex_token_->type = FFELEX_typePOWER;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default: /* * not followed by another *. */
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeCOLON:
|
||
switch (c)
|
||
{
|
||
case ':': /* :: */
|
||
ffelex_token_->type = FFELEX_typeCOLONCOLON;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default: /* : not followed by another :. */
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeSLASH:
|
||
switch (c)
|
||
{
|
||
case '/': /* // */
|
||
ffelex_token_->type = FFELEX_typeCONCAT;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case ')': /* /) */
|
||
ffelex_token_->type = FFELEX_typeCLOSE_ARRAY;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '=': /* /= */
|
||
ffelex_token_->type = FFELEX_typeREL_NE;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeOPEN_PAREN:
|
||
switch (c)
|
||
{
|
||
case '/': /* (/ */
|
||
ffelex_token_->type = FFELEX_typeOPEN_ARRAY;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeOPEN_ANGLE:
|
||
switch (c)
|
||
{
|
||
case '=': /* <= */
|
||
ffelex_token_->type = FFELEX_typeREL_LE;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeEQUALS:
|
||
switch (c)
|
||
{
|
||
case '=': /* == */
|
||
ffelex_token_->type = FFELEX_typeREL_EQ;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '>': /* => */
|
||
ffelex_token_->type = FFELEX_typePOINTS;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeCLOSE_ANGLE:
|
||
switch (c)
|
||
{
|
||
case '=': /* >= */
|
||
ffelex_token_->type = FFELEX_typeREL_GE;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
default:
|
||
assert ("Serious error!!" == NULL);
|
||
abort ();
|
||
break;
|
||
}
|
||
|
||
c = ffelex_card_image_[++column];
|
||
|
||
parse_next_character: /* :::::::::::::::::::: */
|
||
|
||
if (ffelex_raw_mode_ != 0)
|
||
goto parse_raw_character; /* :::::::::::::::::::: */
|
||
|
||
while (c == ' ')
|
||
c = ffelex_card_image_[++column];
|
||
|
||
if ((c == '\0')
|
||
|| (c == '!')
|
||
|| ((c == '/')
|
||
&& (ffelex_card_image_[column + 1] == '*')))
|
||
{
|
||
if ((ffelex_number_of_tokens_ == ffelex_label_tokens_)
|
||
&& (ffelex_token_->type == FFELEX_typeNAMES)
|
||
&& (ffelex_token_->length == 3)
|
||
&& (ffesrc_strncmp_2c (ffe_case_match (),
|
||
ffelex_token_->text,
|
||
"END", "end", "End",
|
||
3)
|
||
== 0))
|
||
{
|
||
ffelex_finish_statement_ ();
|
||
disallow_continuation_line = TRUE;
|
||
ignore_disallowed_continuation = FALSE;
|
||
goto beginning_of_line_again; /* :::::::::::::::::::: */
|
||
}
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
}
|
||
goto parse_nonraw_character; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
/* ffelex_file_free -- Lex a given file in free source form
|
||
|
||
ffewhere wf;
|
||
FILE *f;
|
||
ffelex_file_free(wf,f);
|
||
|
||
Lexes the file according to Fortran 90 ANSI + VXT specifications. */
|
||
|
||
ffelexHandler
|
||
ffelex_file_free (ffewhereFile wf, FILE *f)
|
||
{
|
||
register int c = 0; /* Character currently under consideration. */
|
||
register ffewhereColumnNumber column = 0; /* Not really; 0 means column 1... */
|
||
bool continuation_line = FALSE;
|
||
ffewhereColumnNumber continuation_column;
|
||
int latest_char_in_file = 0; /* For getting back into comment-skipping
|
||
code. */
|
||
|
||
/* Lex is called for a particular file, not for a particular program unit.
|
||
Yet the two events do share common characteristics. The first line in a
|
||
file or in a program unit cannot be a continuation line. No token can
|
||
be in mid-formation. No current label for the statement exists, since
|
||
there is no current statement. */
|
||
|
||
assert (ffelex_handler_ != NULL);
|
||
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
lineno = 0;
|
||
input_filename = ffewhere_file_name (wf);
|
||
#endif
|
||
ffelex_current_wf_ = wf;
|
||
continuation_line = FALSE;
|
||
ffelex_token_->type = FFELEX_typeNONE;
|
||
ffelex_number_of_tokens_ = 0;
|
||
ffelex_current_wl_ = ffewhere_line_unknown ();
|
||
ffelex_current_wc_ = ffewhere_column_unknown ();
|
||
latest_char_in_file = '\n';
|
||
|
||
/* Come here to get a new line. */
|
||
|
||
beginning_of_line: /* :::::::::::::::::::: */
|
||
|
||
c = latest_char_in_file;
|
||
if ((c == EOF) || ((c = ffelex_getc_ (f)) == EOF))
|
||
{
|
||
|
||
end_of_file: /* :::::::::::::::::::: */
|
||
|
||
/* Line ending in EOF instead of \n still counts as a whole line. */
|
||
|
||
ffelex_finish_statement_ ();
|
||
ffewhere_line_kill (ffelex_current_wl_);
|
||
ffewhere_column_kill (ffelex_current_wc_);
|
||
return (ffelexHandler) ffelex_handler_;
|
||
}
|
||
|
||
ffelex_next_line_ ();
|
||
|
||
ffelex_bad_line_ = FALSE;
|
||
|
||
/* Skip over initial-comment and empty lines as quickly as possible! */
|
||
|
||
while ((c == '\n')
|
||
|| (c == '!')
|
||
|| (c == '#'))
|
||
{
|
||
if (c == '#')
|
||
{
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
c = ffelex_hash_ (f);
|
||
#else
|
||
/* Don't skip over # line after all. */
|
||
break;
|
||
#endif
|
||
}
|
||
|
||
comment_line: /* :::::::::::::::::::: */
|
||
|
||
while ((c != '\n') && (c != EOF))
|
||
c = getc (f);
|
||
|
||
if (c == EOF)
|
||
{
|
||
ffelex_next_line_ ();
|
||
goto end_of_file; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
c = getc (f);
|
||
|
||
ffelex_next_line_ ();
|
||
|
||
if (c == EOF)
|
||
goto end_of_file; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
ffelex_saw_tab_ = FALSE;
|
||
|
||
column = ffelex_image_char_ (c, 0);
|
||
|
||
/* Read the entire line in as is (with whitespace processing). */
|
||
|
||
while (((c = getc (f)) != '\n') && (c != EOF))
|
||
column = ffelex_image_char_ (c, column);
|
||
|
||
if (ffelex_bad_line_)
|
||
{
|
||
ffelex_card_image_[column] = '\0';
|
||
ffelex_card_length_ = column;
|
||
goto comment_line; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
/* If no tab, cut off line after column 132. */
|
||
|
||
if (!ffelex_saw_tab_ && (column > FFELEX_FREE_MAX_COLUMNS_))
|
||
column = FFELEX_FREE_MAX_COLUMNS_;
|
||
|
||
ffelex_card_image_[column] = '\0';
|
||
ffelex_card_length_ = column;
|
||
|
||
/* Save next char in file so we can use register-based c while analyzing
|
||
line we just read. */
|
||
|
||
latest_char_in_file = c; /* Should be either '\n' or EOF. */
|
||
|
||
column = 0;
|
||
continuation_column = 0;
|
||
|
||
/* Skip over initial spaces to see if the first nonblank character
|
||
is exclamation point, newline, or EOF (line is therefore a comment) or
|
||
ampersand (line is therefore a continuation line). */
|
||
|
||
while ((c = ffelex_card_image_[column]) == ' ')
|
||
++column;
|
||
|
||
switch (c)
|
||
{
|
||
case '!':
|
||
case '\0':
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
|
||
case '&':
|
||
continuation_column = column + 1;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
/* The line definitely has content of some kind, install new end-statement
|
||
point for error messages. */
|
||
|
||
ffewhere_line_kill (ffelex_current_wl_);
|
||
ffewhere_column_kill (ffelex_current_wc_);
|
||
ffelex_current_wl_ = ffewhere_line_new (ffelex_linecount_current_);
|
||
ffelex_current_wc_ = ffewhere_column_new (ffelex_card_length_ + 1);
|
||
|
||
/* Figure out which column to start parsing at. */
|
||
|
||
if (continuation_line)
|
||
{
|
||
if (continuation_column == 0)
|
||
{
|
||
if (ffelex_raw_mode_ != 0)
|
||
{
|
||
ffelex_bad_1_ (FFEBAD_BAD_CHAR_CONTINUE,
|
||
ffelex_linecount_current_, column + 1);
|
||
}
|
||
else if (ffelex_token_->type != FFELEX_typeNONE)
|
||
{
|
||
ffelex_bad_1_ (FFEBAD_BAD_LEXTOK_CONTINUE,
|
||
ffelex_linecount_current_, column + 1);
|
||
}
|
||
}
|
||
else if (ffelex_is_free_char_ctx_contin_ (continuation_column))
|
||
{ /* Line contains only a single "&" as only
|
||
nonblank character. */
|
||
ffelex_bad_1_ (FFEBAD_BAD_FREE_CONTINUE,
|
||
ffelex_linecount_current_, continuation_column);
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
}
|
||
column = continuation_column;
|
||
}
|
||
else
|
||
column = 0;
|
||
|
||
c = ffelex_card_image_[column];
|
||
continuation_line = FALSE;
|
||
|
||
/* Here is the main engine for parsing. c holds the character at column.
|
||
It is already known that c is not a blank, end of line, or shriek,
|
||
unless ffelex_raw_mode_ is not 0 (indicating we are in a
|
||
character/hollerith constant). A partially filled token may already
|
||
exist in ffelex_token_. */
|
||
|
||
if (ffelex_raw_mode_ != 0)
|
||
{
|
||
|
||
parse_raw_character: /* :::::::::::::::::::: */
|
||
|
||
switch (c)
|
||
{
|
||
case '&':
|
||
if (ffelex_is_free_char_ctx_contin_ (column + 1))
|
||
{
|
||
continuation_line = TRUE;
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case '\0':
|
||
ffelex_finish_statement_ ();
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
switch (ffelex_raw_mode_)
|
||
{
|
||
case -3:
|
||
c = ffelex_backslash_ (c, column);
|
||
if (c == EOF)
|
||
break;
|
||
|
||
if (!ffelex_backslash_reconsider_)
|
||
ffelex_append_to_token_ (c);
|
||
ffelex_raw_mode_ = -1;
|
||
break;
|
||
|
||
case -2:
|
||
if (c == ffelex_raw_char_)
|
||
{
|
||
ffelex_raw_mode_ = -1;
|
||
ffelex_append_to_token_ (c);
|
||
}
|
||
else
|
||
{
|
||
ffelex_raw_mode_ = 0;
|
||
ffelex_backslash_reconsider_ = TRUE;
|
||
}
|
||
break;
|
||
|
||
case -1:
|
||
if (c == ffelex_raw_char_)
|
||
ffelex_raw_mode_ = -2;
|
||
else
|
||
{
|
||
c = ffelex_backslash_ (c, column);
|
||
if (c == EOF)
|
||
{
|
||
ffelex_raw_mode_ = -3;
|
||
break;
|
||
}
|
||
|
||
ffelex_append_to_token_ (c);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
c = ffelex_backslash_ (c, column);
|
||
if (c == EOF)
|
||
break;
|
||
|
||
if (!ffelex_backslash_reconsider_)
|
||
{
|
||
ffelex_append_to_token_ (c);
|
||
--ffelex_raw_mode_;
|
||
}
|
||
break;
|
||
}
|
||
|
||
if (ffelex_backslash_reconsider_)
|
||
ffelex_backslash_reconsider_ = FALSE;
|
||
else
|
||
c = ffelex_card_image_[++column];
|
||
|
||
if (ffelex_raw_mode_ == 0)
|
||
{
|
||
ffelex_send_token_ ();
|
||
assert (ffelex_raw_mode_ == 0);
|
||
while (c == ' ')
|
||
c = ffelex_card_image_[++column];
|
||
if ((c == '\0') || (c == '!'))
|
||
{
|
||
ffelex_finish_statement_ ();
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
}
|
||
if ((c == '&') && ffelex_is_free_nonc_ctx_contin_ (column + 1))
|
||
{
|
||
continuation_line = TRUE;
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
}
|
||
goto parse_nonraw_character_noncontin; /* :::::::::::::::::::: */
|
||
}
|
||
goto parse_raw_character; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
parse_nonraw_character: /* :::::::::::::::::::: */
|
||
|
||
if ((c == '&') && ffelex_is_free_nonc_ctx_contin_ (column + 1))
|
||
{
|
||
continuation_line = TRUE;
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
parse_nonraw_character_noncontin: /* :::::::::::::::::::: */
|
||
|
||
switch (ffelex_token_->type)
|
||
{
|
||
case FFELEX_typeNONE:
|
||
if (c == ' ')
|
||
{ /* Otherwise
|
||
finish-statement/continue-statement
|
||
already checked. */
|
||
while (c == ' ')
|
||
c = ffelex_card_image_[++column];
|
||
if ((c == '\0') || (c == '!'))
|
||
{
|
||
ffelex_finish_statement_ ();
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
}
|
||
if ((c == '&') && ffelex_is_free_nonc_ctx_contin_ (column + 1))
|
||
{
|
||
continuation_line = TRUE;
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
}
|
||
}
|
||
|
||
switch (c)
|
||
{
|
||
case '\"':
|
||
ffelex_token_->type = FFELEX_typeQUOTE;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '$':
|
||
ffelex_token_->type = FFELEX_typeDOLLAR;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '%':
|
||
ffelex_token_->type = FFELEX_typePERCENT;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '&':
|
||
ffelex_token_->type = FFELEX_typeAMPERSAND;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '\'':
|
||
ffelex_token_->type = FFELEX_typeAPOSTROPHE;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '(':
|
||
ffelex_token_->type = FFELEX_typeOPEN_PAREN;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case ')':
|
||
ffelex_token_->type = FFELEX_typeCLOSE_PAREN;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '*':
|
||
ffelex_token_->type = FFELEX_typeASTERISK;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case '+':
|
||
ffelex_token_->type = FFELEX_typePLUS;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case ',':
|
||
ffelex_token_->type = FFELEX_typeCOMMA;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '-':
|
||
ffelex_token_->type = FFELEX_typeMINUS;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '.':
|
||
ffelex_token_->type = FFELEX_typePERIOD;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '/':
|
||
ffelex_token_->type = FFELEX_typeSLASH;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
ffelex_token_->type
|
||
= ffelex_hexnum_ ? FFELEX_typeNAME : FFELEX_typeNUMBER;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_append_to_token_ (c);
|
||
break;
|
||
|
||
case ':':
|
||
ffelex_token_->type = FFELEX_typeCOLON;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case ';':
|
||
ffelex_token_->type = FFELEX_typeSEMICOLON;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_permit_include_ = TRUE;
|
||
ffelex_send_token_ ();
|
||
ffelex_permit_include_ = FALSE;
|
||
break;
|
||
|
||
case '<':
|
||
ffelex_token_->type = FFELEX_typeOPEN_ANGLE;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case '=':
|
||
ffelex_token_->type = FFELEX_typeEQUALS;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case '>':
|
||
ffelex_token_->type = FFELEX_typeCLOSE_ANGLE;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
break;
|
||
|
||
case '?':
|
||
ffelex_token_->type = FFELEX_typeQUESTION;
|
||
ffelex_token_->where_line = ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '_':
|
||
if (1 || ffe_is_90 ())
|
||
{
|
||
ffelex_token_->type = FFELEX_typeUNDERSCORE;
|
||
ffelex_token_->where_line
|
||
= ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col
|
||
= ffewhere_column_new (column + 1);
|
||
ffelex_send_token_ ();
|
||
break;
|
||
}
|
||
/* Fall through. */
|
||
case 'A':
|
||
case 'B':
|
||
case 'C':
|
||
case 'D':
|
||
case 'E':
|
||
case 'F':
|
||
case 'G':
|
||
case 'H':
|
||
case 'I':
|
||
case 'J':
|
||
case 'K':
|
||
case 'L':
|
||
case 'M':
|
||
case 'N':
|
||
case 'O':
|
||
case 'P':
|
||
case 'Q':
|
||
case 'R':
|
||
case 'S':
|
||
case 'T':
|
||
case 'U':
|
||
case 'V':
|
||
case 'W':
|
||
case 'X':
|
||
case 'Y':
|
||
case 'Z':
|
||
case 'a':
|
||
case 'b':
|
||
case 'c':
|
||
case 'd':
|
||
case 'e':
|
||
case 'f':
|
||
case 'g':
|
||
case 'h':
|
||
case 'i':
|
||
case 'j':
|
||
case 'k':
|
||
case 'l':
|
||
case 'm':
|
||
case 'n':
|
||
case 'o':
|
||
case 'p':
|
||
case 'q':
|
||
case 'r':
|
||
case 's':
|
||
case 't':
|
||
case 'u':
|
||
case 'v':
|
||
case 'w':
|
||
case 'x':
|
||
case 'y':
|
||
case 'z':
|
||
c = ffesrc_char_source (c);
|
||
|
||
if (ffesrc_char_match_init (c, 'H', 'h')
|
||
&& ffelex_expecting_hollerith_ != 0)
|
||
{
|
||
ffelex_raw_mode_ = ffelex_expecting_hollerith_;
|
||
ffelex_token_->type = FFELEX_typeHOLLERITH;
|
||
ffelex_token_->where_line = ffelex_raw_where_line_;
|
||
ffelex_token_->where_col = ffelex_raw_where_col_;
|
||
ffelex_raw_where_line_ = ffewhere_line_unknown ();
|
||
ffelex_raw_where_col_ = ffewhere_column_unknown ();
|
||
c = ffelex_card_image_[++column];
|
||
goto parse_raw_character; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
if (ffelex_names_pure_)
|
||
{
|
||
ffelex_token_->where_line
|
||
= ffewhere_line_use (ffelex_token_->currentnames_line
|
||
= ffewhere_line_use (ffelex_current_wl_));
|
||
ffelex_token_->where_col
|
||
= ffewhere_column_use (ffelex_token_->currentnames_col
|
||
= ffewhere_column_new (column + 1));
|
||
ffelex_token_->type = FFELEX_typeNAMES;
|
||
}
|
||
else
|
||
{
|
||
ffelex_token_->where_line
|
||
= ffewhere_line_use (ffelex_current_wl_);
|
||
ffelex_token_->where_col = ffewhere_column_new (column + 1);
|
||
ffelex_token_->type = FFELEX_typeNAME;
|
||
}
|
||
ffelex_append_to_token_ (c);
|
||
break;
|
||
|
||
default:
|
||
ffelex_bad_1_ (FFEBAD_UNRECOGNIZED_CHARACTER,
|
||
ffelex_linecount_current_, column + 1);
|
||
ffelex_finish_statement_ ();
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeNAME:
|
||
switch (c)
|
||
{
|
||
case 'A':
|
||
case 'B':
|
||
case 'C':
|
||
case 'D':
|
||
case 'E':
|
||
case 'F':
|
||
case 'G':
|
||
case 'H':
|
||
case 'I':
|
||
case 'J':
|
||
case 'K':
|
||
case 'L':
|
||
case 'M':
|
||
case 'N':
|
||
case 'O':
|
||
case 'P':
|
||
case 'Q':
|
||
case 'R':
|
||
case 'S':
|
||
case 'T':
|
||
case 'U':
|
||
case 'V':
|
||
case 'W':
|
||
case 'X':
|
||
case 'Y':
|
||
case 'Z':
|
||
case 'a':
|
||
case 'b':
|
||
case 'c':
|
||
case 'd':
|
||
case 'e':
|
||
case 'f':
|
||
case 'g':
|
||
case 'h':
|
||
case 'i':
|
||
case 'j':
|
||
case 'k':
|
||
case 'l':
|
||
case 'm':
|
||
case 'n':
|
||
case 'o':
|
||
case 'p':
|
||
case 'q':
|
||
case 'r':
|
||
case 's':
|
||
case 't':
|
||
case 'u':
|
||
case 'v':
|
||
case 'w':
|
||
case 'x':
|
||
case 'y':
|
||
case 'z':
|
||
c = ffesrc_char_source (c);
|
||
/* Fall through. */
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
case '_':
|
||
case '$':
|
||
if ((c == '$')
|
||
&& !ffe_is_dollar_ok ())
|
||
{
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
ffelex_append_to_token_ (c);
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeNAMES:
|
||
switch (c)
|
||
{
|
||
case 'A':
|
||
case 'B':
|
||
case 'C':
|
||
case 'D':
|
||
case 'E':
|
||
case 'F':
|
||
case 'G':
|
||
case 'H':
|
||
case 'I':
|
||
case 'J':
|
||
case 'K':
|
||
case 'L':
|
||
case 'M':
|
||
case 'N':
|
||
case 'O':
|
||
case 'P':
|
||
case 'Q':
|
||
case 'R':
|
||
case 'S':
|
||
case 'T':
|
||
case 'U':
|
||
case 'V':
|
||
case 'W':
|
||
case 'X':
|
||
case 'Y':
|
||
case 'Z':
|
||
case 'a':
|
||
case 'b':
|
||
case 'c':
|
||
case 'd':
|
||
case 'e':
|
||
case 'f':
|
||
case 'g':
|
||
case 'h':
|
||
case 'i':
|
||
case 'j':
|
||
case 'k':
|
||
case 'l':
|
||
case 'm':
|
||
case 'n':
|
||
case 'o':
|
||
case 'p':
|
||
case 'q':
|
||
case 'r':
|
||
case 's':
|
||
case 't':
|
||
case 'u':
|
||
case 'v':
|
||
case 'w':
|
||
case 'x':
|
||
case 'y':
|
||
case 'z':
|
||
c = ffesrc_char_source (c);
|
||
/* Fall through. */
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
case '_':
|
||
case '$':
|
||
if ((c == '$')
|
||
&& !ffe_is_dollar_ok ())
|
||
{
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
if (ffelex_token_->length < FFEWHERE_indexMAX)
|
||
{
|
||
ffewhere_track (&ffelex_token_->currentnames_line,
|
||
&ffelex_token_->currentnames_col,
|
||
ffelex_token_->wheretrack,
|
||
ffelex_token_->length,
|
||
ffelex_linecount_current_,
|
||
column + 1);
|
||
}
|
||
ffelex_append_to_token_ (c);
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeNUMBER:
|
||
switch (c)
|
||
{
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
ffelex_append_to_token_ (c);
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeASTERISK:
|
||
switch (c)
|
||
{
|
||
case '*': /* ** */
|
||
ffelex_token_->type = FFELEX_typePOWER;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default: /* * not followed by another *. */
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeCOLON:
|
||
switch (c)
|
||
{
|
||
case ':': /* :: */
|
||
ffelex_token_->type = FFELEX_typeCOLONCOLON;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default: /* : not followed by another :. */
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeSLASH:
|
||
switch (c)
|
||
{
|
||
case '/': /* // */
|
||
ffelex_token_->type = FFELEX_typeCONCAT;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case ')': /* /) */
|
||
ffelex_token_->type = FFELEX_typeCLOSE_ARRAY;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '=': /* /= */
|
||
ffelex_token_->type = FFELEX_typeREL_NE;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeOPEN_PAREN:
|
||
switch (c)
|
||
{
|
||
case '/': /* (/ */
|
||
ffelex_token_->type = FFELEX_typeOPEN_ARRAY;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeOPEN_ANGLE:
|
||
switch (c)
|
||
{
|
||
case '=': /* <= */
|
||
ffelex_token_->type = FFELEX_typeREL_LE;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeEQUALS:
|
||
switch (c)
|
||
{
|
||
case '=': /* == */
|
||
ffelex_token_->type = FFELEX_typeREL_EQ;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
case '>': /* => */
|
||
ffelex_token_->type = FFELEX_typePOINTS;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
case FFELEX_typeCLOSE_ANGLE:
|
||
switch (c)
|
||
{
|
||
case '=': /* >= */
|
||
ffelex_token_->type = FFELEX_typeREL_GE;
|
||
ffelex_send_token_ ();
|
||
break;
|
||
|
||
default:
|
||
ffelex_send_token_ ();
|
||
goto parse_next_character; /* :::::::::::::::::::: */
|
||
}
|
||
break;
|
||
|
||
default:
|
||
assert ("Serious error!" == NULL);
|
||
abort ();
|
||
break;
|
||
}
|
||
|
||
c = ffelex_card_image_[++column];
|
||
|
||
parse_next_character: /* :::::::::::::::::::: */
|
||
|
||
if (ffelex_raw_mode_ != 0)
|
||
goto parse_raw_character; /* :::::::::::::::::::: */
|
||
|
||
if ((c == '\0') || (c == '!'))
|
||
{
|
||
ffelex_finish_statement_ ();
|
||
goto beginning_of_line; /* :::::::::::::::::::: */
|
||
}
|
||
goto parse_nonraw_character; /* :::::::::::::::::::: */
|
||
}
|
||
|
||
/* See the code in com.c that calls this to understand why. */
|
||
|
||
#if FFECOM_targetCURRENT == FFECOM_targetGCC
|
||
void
|
||
ffelex_hash_kludge (FILE *finput)
|
||
{
|
||
/* If you change this constant string, you have to change whatever
|
||
code might thus be affected by it in terms of having to use
|
||
ffelex_getc_() instead of getc() in the lexers and _hash_. */
|
||
static char match[] = "# 1 \"";
|
||
static int kludge[ARRAY_SIZE (match) + 1];
|
||
int c;
|
||
char *p;
|
||
int *q;
|
||
|
||
/* Read chars as long as they match the target string.
|
||
Copy them into an array that will serve as a record
|
||
of what we read (essentially a multi-char ungetc(),
|
||
for code that uses ffelex_getc_ instead of getc() elsewhere
|
||
in the lexer. */
|
||
for (p = &match[0], q = &kludge[0], c = getc (finput);
|
||
(c == *p) && (*p != '\0') && (c != EOF);
|
||
++p, ++q, c = getc (finput))
|
||
*q = c;
|
||
|
||
*q = c; /* Might be EOF, which requires int. */
|
||
*++q = 0;
|
||
|
||
ffelex_kludge_chars_ = &kludge[0];
|
||
|
||
if (*p == 0)
|
||
{
|
||
ffelex_kludge_flag_ = TRUE;
|
||
++ffelex_kludge_chars_;
|
||
ffelex_hash_ (finput); /* Handle it NOW rather than later. */
|
||
ffelex_kludge_flag_ = FALSE;
|
||
}
|
||
}
|
||
|
||
#endif
|
||
void
|
||
ffelex_init_1 ()
|
||
{
|
||
unsigned int i;
|
||
|
||
ffelex_final_nontab_column_ = ffe_fixed_line_length ();
|
||
ffelex_card_size_ = FFELEX_columnINITIAL_SIZE_;
|
||
ffelex_card_image_ = malloc_new_ksr (malloc_pool_image (),
|
||
"FFELEX card image",
|
||
FFELEX_columnINITIAL_SIZE_ + 9);
|
||
ffelex_card_image_[0] = '\0';
|
||
|
||
for (i = 0; i < 256; ++i)
|
||
ffelex_first_char_[i] = FFELEX_typeERROR;
|
||
|
||
ffelex_first_char_['\t'] = FFELEX_typeRAW;
|
||
ffelex_first_char_['\n'] = FFELEX_typeCOMMENT;
|
||
ffelex_first_char_['\v'] = FFELEX_typeCOMMENT;
|
||
ffelex_first_char_['\f'] = FFELEX_typeCOMMENT;
|
||
ffelex_first_char_['\r'] = FFELEX_typeRAW;
|
||
ffelex_first_char_[' '] = FFELEX_typeRAW;
|
||
ffelex_first_char_['!'] = FFELEX_typeCOMMENT;
|
||
ffelex_first_char_['*'] = FFELEX_typeCOMMENT;
|
||
ffelex_first_char_['/'] = FFELEX_typeSLASH;
|
||
ffelex_first_char_['&'] = FFELEX_typeRAW;
|
||
ffelex_first_char_['#'] = FFELEX_typeHASH;
|
||
|
||
for (i = '0'; i <= '9'; ++i)
|
||
ffelex_first_char_[i] = FFELEX_typeRAW;
|
||
|
||
if ((ffe_case_match () == FFE_caseNONE)
|
||
|| ((ffe_case_match () == FFE_caseUPPER)
|
||
&& (ffe_case_source () != FFE_caseLOWER)) /* Idiot! :-) */
|
||
|| ((ffe_case_match () == FFE_caseLOWER)
|
||
&& (ffe_case_source () == FFE_caseLOWER)))
|
||
{
|
||
ffelex_first_char_['C'] = FFELEX_typeCOMMENT;
|
||
ffelex_first_char_['D'] = FFELEX_typeCOMMENT;
|
||
}
|
||
if ((ffe_case_match () == FFE_caseNONE)
|
||
|| ((ffe_case_match () == FFE_caseLOWER)
|
||
&& (ffe_case_source () != FFE_caseUPPER)) /* Idiot! :-) */
|
||
|| ((ffe_case_match () == FFE_caseUPPER)
|
||
&& (ffe_case_source () == FFE_caseUPPER)))
|
||
{
|
||
ffelex_first_char_['c'] = FFELEX_typeCOMMENT;
|
||
ffelex_first_char_['d'] = FFELEX_typeCOMMENT;
|
||
}
|
||
|
||
ffelex_linecount_current_ = 0;
|
||
ffelex_linecount_next_ = 1;
|
||
ffelex_raw_mode_ = 0;
|
||
ffelex_set_include_ = FALSE;
|
||
ffelex_permit_include_ = FALSE;
|
||
ffelex_names_ = TRUE; /* First token in program is a names. */
|
||
ffelex_names_pure_ = FALSE; /* Free-form lexer does NAMES only for
|
||
FORMAT. */
|
||
ffelex_hexnum_ = FALSE;
|
||
ffelex_expecting_hollerith_ = 0;
|
||
ffelex_raw_where_line_ = ffewhere_line_unknown ();
|
||
ffelex_raw_where_col_ = ffewhere_column_unknown ();
|
||
|
||
ffelex_token_ = ffelex_token_new_ ();
|
||
ffelex_token_->type = FFELEX_typeNONE;
|
||
ffelex_token_->uses = 1;
|
||
ffelex_token_->where_line = ffewhere_line_unknown ();
|
||
ffelex_token_->where_col = ffewhere_column_unknown ();
|
||
ffelex_token_->text = NULL;
|
||
|
||
ffelex_handler_ = NULL;
|
||
}
|
||
|
||
/* ffelex_is_names_expected -- Is the current parser expecting NAMES vs. NAME?
|
||
|
||
if (ffelex_is_names_expected())
|
||
// Deliver NAMES token
|
||
else
|
||
// Deliver NAME token
|
||
|
||
Must be called while lexer is active, obviously. */
|
||
|
||
bool
|
||
ffelex_is_names_expected ()
|
||
{
|
||
return ffelex_names_;
|
||
}
|
||
|
||
/* Current card image, which has the master linecount number
|
||
ffelex_linecount_current_. */
|
||
|
||
char *
|
||
ffelex_line ()
|
||
{
|
||
return ffelex_card_image_;
|
||
}
|
||
|
||
/* ffelex_line_length -- Return length of current lexer line
|
||
|
||
printf("Length is %lu\n",ffelex_line_length());
|
||
|
||
Must be called while lexer is active, obviously. */
|
||
|
||
ffewhereColumnNumber
|
||
ffelex_line_length ()
|
||
{
|
||
return ffelex_card_length_;
|
||
}
|
||
|
||
/* Master line count of current card image, or 0 if no card image
|
||
is current. */
|
||
|
||
ffewhereLineNumber
|
||
ffelex_line_number ()
|
||
{
|
||
return ffelex_linecount_current_;
|
||
}
|
||
|
||
/* ffelex_set_expecting_hollerith -- Set hollerith expectation status
|
||
|
||
ffelex_set_expecting_hollerith(0);
|
||
|
||
Lex initially assumes no hollerith constant is about to show up. If
|
||
syntactic analysis expects one, it should call this function with the
|
||
number of characters expected in the constant immediately after recognizing
|
||
the decimal number preceding the "H" and the constant itself. Then, if
|
||
the next character is indeed H, the lexer will interpret it as beginning
|
||
a hollerith constant and ship the token formed by reading the specified
|
||
number of characters (interpreting blanks and otherwise-comments too)
|
||
from the input file. It is up to syntactic analysis to call this routine
|
||
again with 0 to turn hollerith detection off immediately upon receiving
|
||
the token that might or might not be HOLLERITH.
|
||
|
||
Also call this after seeing an APOSTROPHE or QUOTE token that begins a
|
||
character constant. Pass the expected termination character (apostrophe
|
||
or quote).
|
||
|
||
Pass for length either the length of the hollerith (must be > 0), -1
|
||
meaning expecting a character constant, or 0 to cancel expectation of
|
||
a hollerith only after calling it with a length of > 0 and receiving the
|
||
next token (which may or may not have been a HOLLERITH token).
|
||
|
||
Pass for which either an apostrophe or quote when passing length of -1.
|
||
Else which is a don't-care.
|
||
|
||
Pass for line and column the line/column info for the token beginning the
|
||
character or hollerith constant, for use in error messages, when passing
|
||
a length of -1 -- this function will invoke ffewhere_line/column_use to
|
||
make its own copies. Else line and column are don't-cares (when length
|
||
is 0) and the outstanding copies of the previous line/column info, if
|
||
still around, are killed.
|
||
|
||
21-Feb-90 JCB 3.1
|
||
When called with length of 0, also zero ffelex_raw_mode_. This is
|
||
so ffest_save_ can undo the effects of replaying tokens like
|
||
APOSTROPHE and QUOTE.
|
||
25-Jan-90 JCB 3.0
|
||
New line, column arguments allow error messages to point to the true
|
||
beginning of a character/hollerith constant, rather than the beginning
|
||
of the content part, which makes them more consistent and helpful.
|
||
05-Nov-89 JCB 2.0
|
||
New "which" argument allows caller to specify termination character,
|
||
which should be apostrophe or double-quote, to support Fortran 90. */
|
||
|
||
void
|
||
ffelex_set_expecting_hollerith (long length, char which,
|
||
ffewhereLine line, ffewhereColumn column)
|
||
{
|
||
|
||
/* First kill the pending line/col info, if any (should only be pending
|
||
when this call has length==0, the previous call had length>0, and a
|
||
non-HOLLERITH token was sent in between the calls, but play it safe). */
|
||
|
||
ffewhere_line_kill (ffelex_raw_where_line_);
|
||
ffewhere_column_kill (ffelex_raw_where_col_);
|
||
|
||
/* Now handle the length function. */
|
||
switch (length)
|
||
{
|
||
case 0:
|
||
ffelex_expecting_hollerith_ = 0;
|
||
ffelex_raw_mode_ = 0;
|
||
ffelex_raw_where_line_ = ffewhere_line_unknown ();
|
||
ffelex_raw_where_col_ = ffewhere_column_unknown ();
|
||
return; /* Don't set new line/column info from args. */
|
||
|
||
case -1:
|
||
ffelex_raw_mode_ = -1;
|
||
ffelex_raw_char_ = which;
|
||
break;
|
||
|
||
default: /* length > 0 */
|
||
ffelex_expecting_hollerith_ = length;
|
||
break;
|
||
}
|
||
|
||
/* Now set new line/column information from passed args. */
|
||
|
||
ffelex_raw_where_line_ = ffewhere_line_use (line);
|
||
ffelex_raw_where_col_ = ffewhere_column_use (column);
|
||
}
|
||
|
||
/* ffelex_set_handler -- Set handler for tokens before calling _fixed or _free
|
||
|
||
ffelex_set_handler((ffelexHandler) my_first_handler);
|
||
|
||
Must be called before calling ffelex_file_fixed or ffelex_file_free or
|
||
after they return, but not while they are active. */
|
||
|
||
void
|
||
ffelex_set_handler (ffelexHandler first)
|
||
{
|
||
ffelex_handler_ = first;
|
||
}
|
||
|
||
/* ffelex_set_hexnum -- Set hexnum flag
|
||
|
||
ffelex_set_hexnum(TRUE);
|
||
|
||
Lex normally interprets a token starting with [0-9] as a NUMBER token,
|
||
so if it sees a [A-Za-z] in it, it stops parsing the NUMBER and leaves
|
||
the character as the first of the next token. But when parsing a
|
||
hexadecimal number, by calling this function with TRUE before starting
|
||
the parse of the token itself, lex will interpret [0-9] as the start
|
||
of a NAME token. */
|
||
|
||
void
|
||
ffelex_set_hexnum (bool f)
|
||
{
|
||
ffelex_hexnum_ = f;
|
||
}
|
||
|
||
/* ffelex_set_include -- Set INCLUDE file to be processed next
|
||
|
||
ffewhereFile wf; // The ffewhereFile object for the file.
|
||
bool free_form; // TRUE means read free-form file, FALSE fixed-form.
|
||
FILE *fi; // The file to INCLUDE.
|
||
ffelex_set_include(wf,free_form,fi);
|
||
|
||
Must be called only after receiving the EOS token following a valid
|
||
INCLUDE statement specifying a file that has already been successfully
|
||
opened. */
|
||
|
||
void
|
||
ffelex_set_include (ffewhereFile wf, bool free_form, FILE *fi)
|
||
{
|
||
assert (ffelex_permit_include_);
|
||
assert (!ffelex_set_include_);
|
||
ffelex_set_include_ = TRUE;
|
||
ffelex_include_free_form_ = free_form;
|
||
ffelex_include_file_ = fi;
|
||
ffelex_include_wherefile_ = wf;
|
||
}
|
||
|
||
/* ffelex_set_names -- Set names/name flag, names = TRUE
|
||
|
||
ffelex_set_names(FALSE);
|
||
|
||
Lex initially assumes multiple names should be formed. If this function is
|
||
called with FALSE, then single names are formed instead. The differences
|
||
are a difference in the token type (FFELEX_typeNAMES vs. FFELEX_typeNAME)
|
||
and in whether full source-location tracking is performed (it is for
|
||
multiple names, not for single names), which is more expensive in terms of
|
||
CPU time. */
|
||
|
||
void
|
||
ffelex_set_names (bool f)
|
||
{
|
||
ffelex_names_ = f;
|
||
if (!f)
|
||
ffelex_names_pure_ = FALSE;
|
||
}
|
||
|
||
/* ffelex_set_names_pure -- Set names/name (pure) flag, names = TRUE
|
||
|
||
ffelex_set_names_pure(FALSE);
|
||
|
||
Like ffelex_set_names, except affects both lexers. Normally, the
|
||
free-form lexer need not generate NAMES tokens because adjacent NAME
|
||
tokens must be separated by spaces which causes the lexer to generate
|
||
separate tokens for analysis (whereas in fixed-form the spaces are
|
||
ignored resulting in one long token). But in FORMAT statements, for
|
||
some reason, the Fortran 90 standard specifies that spaces can occur
|
||
anywhere within a format-item-list with no effect on the format spec
|
||
(except of course within character string edit descriptors), which means
|
||
that "1PE14.2" and "1 P E 1 4 . 2" are equivalent. For the FORMAT
|
||
statement handling, the existence of spaces makes it hard to deal with,
|
||
because each token is seen distinctly (i.e. seven tokens in the latter
|
||
example). But when no spaces are provided, as in the former example,
|
||
then only four tokens are generated, NUMBER("1"), NAME("PE14"), PERIOD,
|
||
NUMBER ("2"). By generating a NAMES instead of NAME, three things happen:
|
||
One, ffest_kw_format_ does a substring rather than full-string match,
|
||
and thus matches "PE14" to "PE"; two, ffelex_token_xyz_from_names functions
|
||
may be used to pull NAME/NAMES and NUMBER tokens out of the NAMES token;
|
||
and three, error reporting can point to the actual character rather than
|
||
at or prior to it. The first two things could be resolved by providing
|
||
alternate functions fairly easy, thus allowing FORMAT handling to expect
|
||
both lexers to generate NAME tokens instead of NAMES (with otherwise minor
|
||
changes to FORMAT parsing), but the third, error reporting, would suffer,
|
||
and when one makes mistakes in a FORMAT, believe me, one wants a pointer
|
||
to exactly where the compilers thinks the problem is, to even begin to get
|
||
a handle on it. So there. */
|
||
|
||
void
|
||
ffelex_set_names_pure (bool f)
|
||
{
|
||
ffelex_names_pure_ = f;
|
||
ffelex_names_ = f;
|
||
}
|
||
|
||
/* ffelex_splice_tokens -- Splice off and send tokens from a NAMES
|
||
|
||
return (ffelexHandler) ffelex_splice_tokens(first_handler,master_token,
|
||
start_char_index);
|
||
|
||
Returns first_handler if start_char_index chars into master_token (which
|
||
must be a NAMES token) is '\0'. Else, creates a subtoken from that
|
||
char, either NUMBER (if it is a digit), a NAME (if a valid firstnamechar),
|
||
an UNDERSCORE (if an underscore), or DOLLAR (if a dollar sign)
|
||
and sends it to first_handler. If anything other than NAME is sent, the
|
||
character at the end of it in the master token is examined to see if it
|
||
begins a NAME, NUMBER, UNDERSCORE, or DOLLAR, and, if so,
|
||
the handler returned by first_handler is invoked with that token, and
|
||
this process is repeated until the end of the master token or a NAME
|
||
token is reached. */
|
||
|
||
ffelexHandler
|
||
ffelex_splice_tokens (ffelexHandler first, ffelexToken master,
|
||
ffeTokenLength start)
|
||
{
|
||
unsigned char *p;
|
||
ffeTokenLength i;
|
||
ffelexToken t;
|
||
|
||
p = ffelex_token_text (master) + (i = start);
|
||
|
||
while (*p != '\0')
|
||
{
|
||
if (ISDIGIT (*p))
|
||
{
|
||
t = ffelex_token_number_from_names (master, i);
|
||
p += ffelex_token_length (t);
|
||
i += ffelex_token_length (t);
|
||
}
|
||
else if (ffesrc_is_name_init (*p))
|
||
{
|
||
t = ffelex_token_name_from_names (master, i, 0);
|
||
p += ffelex_token_length (t);
|
||
i += ffelex_token_length (t);
|
||
}
|
||
else if (*p == '$')
|
||
{
|
||
t = ffelex_token_dollar_from_names (master, i);
|
||
++p;
|
||
++i;
|
||
}
|
||
else if (*p == '_')
|
||
{
|
||
t = ffelex_token_uscore_from_names (master, i);
|
||
++p;
|
||
++i;
|
||
}
|
||
else
|
||
{
|
||
assert ("not a valid NAMES character" == NULL);
|
||
t = NULL;
|
||
}
|
||
assert (first != NULL);
|
||
first = (ffelexHandler) (*first) (t);
|
||
ffelex_token_kill (t);
|
||
}
|
||
|
||
return first;
|
||
}
|
||
|
||
/* ffelex_swallow_tokens -- Eat all tokens delivered to me
|
||
|
||
return ffelex_swallow_tokens;
|
||
|
||
Return this handler when you don't want to look at any more tokens in the
|
||
statement because you've encountered an unrecoverable error in the
|
||
statement. */
|
||
|
||
ffelexHandler
|
||
ffelex_swallow_tokens (ffelexToken t, ffelexHandler handler)
|
||
{
|
||
assert (handler != NULL);
|
||
|
||
if ((t != NULL) && ((ffelex_token_type (t) == FFELEX_typeEOS)
|
||
|| (ffelex_token_type (t) == FFELEX_typeSEMICOLON)))
|
||
return (ffelexHandler) (*handler) (t);
|
||
|
||
ffelex_eos_handler_ = handler;
|
||
return (ffelexHandler) ffelex_swallow_tokens_;
|
||
}
|
||
|
||
/* ffelex_token_dollar_from_names -- Return a dollar from within a names token
|
||
|
||
ffelexToken t;
|
||
t = ffelex_token_dollar_from_names(t,6);
|
||
|
||
It's as if you made a new token of dollar type having the dollar
|
||
at, in the example above, the sixth character of the NAMES token. */
|
||
|
||
ffelexToken
|
||
ffelex_token_dollar_from_names (ffelexToken t, ffeTokenLength start)
|
||
{
|
||
ffelexToken nt;
|
||
|
||
assert (t != NULL);
|
||
assert (ffelex_token_type (t) == FFELEX_typeNAMES);
|
||
assert (start < t->length);
|
||
assert (t->text[start] == '$');
|
||
|
||
/* Now make the token. */
|
||
|
||
nt = ffelex_token_new_ ();
|
||
nt->type = FFELEX_typeDOLLAR;
|
||
nt->length = 0;
|
||
nt->uses = 1;
|
||
ffewhere_set_from_track (&nt->where_line, &nt->where_col, t->where_line,
|
||
t->where_col, t->wheretrack, start);
|
||
nt->text = NULL;
|
||
return nt;
|
||
}
|
||
|
||
/* ffelex_token_kill -- Decrement use count for token, kill if no uses left
|
||
|
||
ffelexToken t;
|
||
ffelex_token_kill(t);
|
||
|
||
Complements a call to ffelex_token_use or ffelex_token_new_.... */
|
||
|
||
void
|
||
ffelex_token_kill (ffelexToken t)
|
||
{
|
||
assert (t != NULL);
|
||
|
||
assert (t->uses > 0);
|
||
|
||
if (--t->uses != 0)
|
||
return;
|
||
|
||
--ffelex_total_tokens_;
|
||
|
||
if (t->type == FFELEX_typeNAMES)
|
||
ffewhere_track_kill (t->where_line, t->where_col,
|
||
t->wheretrack, t->length);
|
||
ffewhere_line_kill (t->where_line);
|
||
ffewhere_column_kill (t->where_col);
|
||
if (t->text != NULL)
|
||
malloc_kill_ksr (malloc_pool_image (), t->text, t->size + 1);
|
||
malloc_kill_ks (malloc_pool_image (), t, sizeof (*t));
|
||
}
|
||
|
||
/* Make a new NAME token that is a substring of a NAMES token. */
|
||
|
||
ffelexToken
|
||
ffelex_token_name_from_names (ffelexToken t, ffeTokenLength start,
|
||
ffeTokenLength len)
|
||
{
|
||
ffelexToken nt;
|
||
|
||
assert (t != NULL);
|
||
assert (ffelex_token_type (t) == FFELEX_typeNAMES);
|
||
assert (start < t->length);
|
||
if (len == 0)
|
||
len = t->length - start;
|
||
else
|
||
{
|
||
assert (len > 0);
|
||
assert ((start + len) <= t->length);
|
||
}
|
||
assert (ffelex_is_firstnamechar ((unsigned char)(t->text[start])));
|
||
|
||
nt = ffelex_token_new_ ();
|
||
nt->type = FFELEX_typeNAME;
|
||
nt->size = len; /* Assume nobody's gonna fiddle with token
|
||
text. */
|
||
nt->length = len;
|
||
nt->uses = 1;
|
||
ffewhere_set_from_track (&nt->where_line, &nt->where_col, t->where_line,
|
||
t->where_col, t->wheretrack, start);
|
||
nt->text = malloc_new_ksr (malloc_pool_image (), "FFELEX token text",
|
||
len + 1);
|
||
strncpy (nt->text, t->text + start, len);
|
||
nt->text[len] = '\0';
|
||
return nt;
|
||
}
|
||
|
||
/* Make a new NAMES token that is a substring of another NAMES token. */
|
||
|
||
ffelexToken
|
||
ffelex_token_names_from_names (ffelexToken t, ffeTokenLength start,
|
||
ffeTokenLength len)
|
||
{
|
||
ffelexToken nt;
|
||
|
||
assert (t != NULL);
|
||
assert (ffelex_token_type (t) == FFELEX_typeNAMES);
|
||
assert (start < t->length);
|
||
if (len == 0)
|
||
len = t->length - start;
|
||
else
|
||
{
|
||
assert (len > 0);
|
||
assert ((start + len) <= t->length);
|
||
}
|
||
assert (ffelex_is_firstnamechar ((unsigned char)(t->text[start])));
|
||
|
||
nt = ffelex_token_new_ ();
|
||
nt->type = FFELEX_typeNAMES;
|
||
nt->size = len; /* Assume nobody's gonna fiddle with token
|
||
text. */
|
||
nt->length = len;
|
||
nt->uses = 1;
|
||
ffewhere_set_from_track (&nt->where_line, &nt->where_col, t->where_line,
|
||
t->where_col, t->wheretrack, start);
|
||
ffewhere_track_copy (nt->wheretrack, t->wheretrack, start, len);
|
||
nt->text = malloc_new_ksr (malloc_pool_image (), "FFELEX token text",
|
||
len + 1);
|
||
strncpy (nt->text, t->text + start, len);
|
||
nt->text[len] = '\0';
|
||
return nt;
|
||
}
|
||
|
||
/* Make a new CHARACTER token. */
|
||
|
||
ffelexToken
|
||
ffelex_token_new_character (const char *s, ffewhereLine l, ffewhereColumn c)
|
||
{
|
||
ffelexToken t;
|
||
|
||
t = ffelex_token_new_ ();
|
||
t->type = FFELEX_typeCHARACTER;
|
||
t->length = t->size = strlen (s); /* Assume it won't get bigger. */
|
||
t->uses = 1;
|
||
t->text = malloc_new_ksr (malloc_pool_image (), "FFELEX token text",
|
||
t->size + 1);
|
||
strcpy (t->text, s);
|
||
t->where_line = ffewhere_line_use (l);
|
||
t->where_col = ffewhere_column_new (c);
|
||
return t;
|
||
}
|
||
|
||
/* Make a new EOF token right after end of file. */
|
||
|
||
ffelexToken
|
||
ffelex_token_new_eof ()
|
||
{
|
||
ffelexToken t;
|
||
|
||
t = ffelex_token_new_ ();
|
||
t->type = FFELEX_typeEOF;
|
||
t->uses = 1;
|
||
t->text = NULL;
|
||
t->where_line = ffewhere_line_new (ffelex_linecount_current_);
|
||
t->where_col = ffewhere_column_new (1);
|
||
return t;
|
||
}
|
||
|
||
/* Make a new NAME token. */
|
||
|
||
ffelexToken
|
||
ffelex_token_new_name (const char *s, ffewhereLine l, ffewhereColumn c)
|
||
{
|
||
ffelexToken t;
|
||
|
||
assert (ffelex_is_firstnamechar ((unsigned char)*s));
|
||
|
||
t = ffelex_token_new_ ();
|
||
t->type = FFELEX_typeNAME;
|
||
t->length = t->size = strlen (s); /* Assume it won't get bigger. */
|
||
t->uses = 1;
|
||
t->text = malloc_new_ksr (malloc_pool_image (), "FFELEX token text",
|
||
t->size + 1);
|
||
strcpy (t->text, s);
|
||
t->where_line = ffewhere_line_use (l);
|
||
t->where_col = ffewhere_column_new (c);
|
||
return t;
|
||
}
|
||
|
||
/* Make a new NAMES token. */
|
||
|
||
ffelexToken
|
||
ffelex_token_new_names (const char *s, ffewhereLine l, ffewhereColumn c)
|
||
{
|
||
ffelexToken t;
|
||
|
||
assert (ffelex_is_firstnamechar ((unsigned char)*s));
|
||
|
||
t = ffelex_token_new_ ();
|
||
t->type = FFELEX_typeNAMES;
|
||
t->length = t->size = strlen (s); /* Assume it won't get bigger. */
|
||
t->uses = 1;
|
||
t->text = malloc_new_ksr (malloc_pool_image (), "FFELEX token text",
|
||
t->size + 1);
|
||
strcpy (t->text, s);
|
||
t->where_line = ffewhere_line_use (l);
|
||
t->where_col = ffewhere_column_new (c);
|
||
ffewhere_track_clear (t->wheretrack, t->length); /* Assume contiguous
|
||
names. */
|
||
return t;
|
||
}
|
||
|
||
/* Make a new NUMBER token.
|
||
|
||
The first character of the string must be a digit, and only the digits
|
||
are copied into the new number. So this may be used to easily extract
|
||
a NUMBER token from within any text string. Then the length of the
|
||
resulting token may be used to calculate where the digits stopped
|
||
in the original string. */
|
||
|
||
ffelexToken
|
||
ffelex_token_new_number (const char *s, ffewhereLine l, ffewhereColumn c)
|
||
{
|
||
ffelexToken t;
|
||
ffeTokenLength len;
|
||
|
||
/* How long is the string of decimal digits at s? */
|
||
|
||
len = strspn (s, "0123456789");
|
||
|
||
/* Make sure there is at least one digit. */
|
||
|
||
assert (len != 0);
|
||
|
||
/* Now make the token. */
|
||
|
||
t = ffelex_token_new_ ();
|
||
t->type = FFELEX_typeNUMBER;
|
||
t->length = t->size = len; /* Assume it won't get bigger. */
|
||
t->uses = 1;
|
||
t->text = malloc_new_ksr (malloc_pool_image (), "FFELEX token text",
|
||
len + 1);
|
||
strncpy (t->text, s, len);
|
||
t->text[len] = '\0';
|
||
t->where_line = ffewhere_line_use (l);
|
||
t->where_col = ffewhere_column_new (c);
|
||
return t;
|
||
}
|
||
|
||
/* Make a new token of any type that doesn't contain text. A private
|
||
function that is used by public macros in the interface file. */
|
||
|
||
ffelexToken
|
||
ffelex_token_new_simple_ (ffelexType type, ffewhereLine l, ffewhereColumn c)
|
||
{
|
||
ffelexToken t;
|
||
|
||
t = ffelex_token_new_ ();
|
||
t->type = type;
|
||
t->uses = 1;
|
||
t->text = NULL;
|
||
t->where_line = ffewhere_line_use (l);
|
||
t->where_col = ffewhere_column_new (c);
|
||
return t;
|
||
}
|
||
|
||
/* Make a new NUMBER token from an existing NAMES token.
|
||
|
||
Like ffelex_token_new_number, this function calculates the length
|
||
of the digit string itself. */
|
||
|
||
ffelexToken
|
||
ffelex_token_number_from_names (ffelexToken t, ffeTokenLength start)
|
||
{
|
||
ffelexToken nt;
|
||
ffeTokenLength len;
|
||
|
||
assert (t != NULL);
|
||
assert (ffelex_token_type (t) == FFELEX_typeNAMES);
|
||
assert (start < t->length);
|
||
|
||
/* How long is the string of decimal digits at s? */
|
||
|
||
len = strspn (t->text + start, "0123456789");
|
||
|
||
/* Make sure there is at least one digit. */
|
||
|
||
assert (len != 0);
|
||
|
||
/* Now make the token. */
|
||
|
||
nt = ffelex_token_new_ ();
|
||
nt->type = FFELEX_typeNUMBER;
|
||
nt->size = len; /* Assume nobody's gonna fiddle with token
|
||
text. */
|
||
nt->length = len;
|
||
nt->uses = 1;
|
||
ffewhere_set_from_track (&nt->where_line, &nt->where_col, t->where_line,
|
||
t->where_col, t->wheretrack, start);
|
||
nt->text = malloc_new_ksr (malloc_pool_image (), "FFELEX token text",
|
||
len + 1);
|
||
strncpy (nt->text, t->text + start, len);
|
||
nt->text[len] = '\0';
|
||
return nt;
|
||
}
|
||
|
||
/* Make a new UNDERSCORE token from a NAMES token. */
|
||
|
||
ffelexToken
|
||
ffelex_token_uscore_from_names (ffelexToken t, ffeTokenLength start)
|
||
{
|
||
ffelexToken nt;
|
||
|
||
assert (t != NULL);
|
||
assert (ffelex_token_type (t) == FFELEX_typeNAMES);
|
||
assert (start < t->length);
|
||
assert (t->text[start] == '_');
|
||
|
||
/* Now make the token. */
|
||
|
||
nt = ffelex_token_new_ ();
|
||
nt->type = FFELEX_typeUNDERSCORE;
|
||
nt->uses = 1;
|
||
ffewhere_set_from_track (&nt->where_line, &nt->where_col, t->where_line,
|
||
t->where_col, t->wheretrack, start);
|
||
nt->text = NULL;
|
||
return nt;
|
||
}
|
||
|
||
/* ffelex_token_use -- Return another instance of a token
|
||
|
||
ffelexToken t;
|
||
t = ffelex_token_use(t);
|
||
|
||
In a sense, the new token is a copy of the old, though it might be the
|
||
same with just a new use count.
|
||
|
||
We use the use count method (easy). */
|
||
|
||
ffelexToken
|
||
ffelex_token_use (ffelexToken t)
|
||
{
|
||
if (t == NULL)
|
||
assert ("_token_use: null token" == NULL);
|
||
t->uses++;
|
||
return t;
|
||
}
|