1179 lines
28 KiB
C
1179 lines
28 KiB
C
/* This is the Assembler Pre-Processor
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Copyright (C) 1987, 90, 91, 92, 93, 94, 95, 96, 1997
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Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS 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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GAS 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 GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/* Modified by Allen Wirfs-Brock, Instantiations Inc 2/90 */
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/* App, the assembler pre-processor. This pre-processor strips out excess
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spaces, turns single-quoted characters into a decimal constant, and turns
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# <number> <filename> <garbage> into a .line <number>\n.file <filename>
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pair. This needs better error-handling. */
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#include <stdio.h>
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#include "as.h" /* For BAD_CASE() only */
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#if (__STDC__ != 1)
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#ifndef const
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#define const /* empty */
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#endif
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#endif
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/* Whether we are scrubbing in m68k MRI mode. This is different from
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flag_m68k_mri, because the two flags will be affected by the .mri
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pseudo-op at different times. */
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static int scrub_m68k_mri;
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/* The pseudo-op which switches in and out of MRI mode. See the
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comment in do_scrub_chars. */
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static const char mri_pseudo[] = ".mri 0";
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static char lex[256];
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static const char symbol_chars[] =
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"$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
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#define LEX_IS_SYMBOL_COMPONENT 1
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#define LEX_IS_WHITESPACE 2
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#define LEX_IS_LINE_SEPARATOR 3
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#define LEX_IS_COMMENT_START 4
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#define LEX_IS_LINE_COMMENT_START 5
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#define LEX_IS_TWOCHAR_COMMENT_1ST 6
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#define LEX_IS_STRINGQUOTE 8
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#define LEX_IS_COLON 9
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#define LEX_IS_NEWLINE 10
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#define LEX_IS_ONECHAR_QUOTE 11
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#ifdef TC_V850
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#define LEX_IS_DOUBLEDASH_1ST 12
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#endif
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#ifdef TC_M32R
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#define LEX_IS_DOUBLEBAR_1ST 13
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#endif
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#define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT)
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#define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE)
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#define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR)
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#define IS_COMMENT(c) (lex[c] == LEX_IS_COMMENT_START)
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#define IS_LINE_COMMENT(c) (lex[c] == LEX_IS_LINE_COMMENT_START)
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#define IS_NEWLINE(c) (lex[c] == LEX_IS_NEWLINE)
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static int process_escape PARAMS ((int));
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/* FIXME-soon: The entire lexer/parser thingy should be
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built statically at compile time rather than dynamically
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each and every time the assembler is run. xoxorich. */
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void
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do_scrub_begin (m68k_mri)
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int m68k_mri;
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{
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const char *p;
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scrub_m68k_mri = m68k_mri;
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lex[' '] = LEX_IS_WHITESPACE;
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lex['\t'] = LEX_IS_WHITESPACE;
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lex['\r'] = LEX_IS_WHITESPACE;
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lex['\n'] = LEX_IS_NEWLINE;
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lex[';'] = LEX_IS_LINE_SEPARATOR;
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lex[':'] = LEX_IS_COLON;
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if (! m68k_mri)
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{
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lex['"'] = LEX_IS_STRINGQUOTE;
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#ifndef TC_HPPA
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lex['\''] = LEX_IS_ONECHAR_QUOTE;
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#endif
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#ifdef SINGLE_QUOTE_STRINGS
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lex['\''] = LEX_IS_STRINGQUOTE;
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#endif
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}
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/* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop
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in state 5 of do_scrub_chars must be changed. */
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/* Note that these override the previous defaults, e.g. if ';' is a
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comment char, then it isn't a line separator. */
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for (p = symbol_chars; *p; ++p)
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{
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lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT;
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} /* declare symbol characters */
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/* The m68k backend wants to be able to change comment_chars. */
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#ifndef tc_comment_chars
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#define tc_comment_chars comment_chars
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#endif
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for (p = tc_comment_chars; *p; p++)
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{
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lex[(unsigned char) *p] = LEX_IS_COMMENT_START;
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} /* declare comment chars */
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for (p = line_comment_chars; *p; p++)
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{
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lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START;
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} /* declare line comment chars */
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for (p = line_separator_chars; *p; p++)
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{
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lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR;
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} /* declare line separators */
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/* Only allow slash-star comments if slash is not in use.
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FIXME: This isn't right. We should always permit them. */
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if (lex['/'] == 0)
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{
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lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST;
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}
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if (m68k_mri)
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{
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lex['\''] = LEX_IS_STRINGQUOTE;
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lex[';'] = LEX_IS_COMMENT_START;
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lex['*'] = LEX_IS_LINE_COMMENT_START;
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/* The MRI documentation says '!' is LEX_IS_COMMENT_START, but
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then it can't be used in an expression. */
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lex['!'] = LEX_IS_LINE_COMMENT_START;
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}
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#ifdef TC_V850
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lex['-'] = LEX_IS_DOUBLEDASH_1ST;
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#endif
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#ifdef TC_M32R
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lex['|'] = LEX_IS_DOUBLEBAR_1ST;
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#endif
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} /* do_scrub_begin() */
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/* Saved state of the scrubber */
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static int state;
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static int old_state;
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static char *out_string;
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static char out_buf[20];
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static int add_newlines;
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static char *saved_input;
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static int saved_input_len;
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static const char *mri_state;
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static char mri_last_ch;
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/* Data structure for saving the state of app across #include's. Note that
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app is called asynchronously to the parsing of the .include's, so our
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state at the time .include is interpreted is completely unrelated.
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That's why we have to save it all. */
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struct app_save
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{
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int state;
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int old_state;
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char *out_string;
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char out_buf[sizeof (out_buf)];
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int add_newlines;
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char *saved_input;
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int saved_input_len;
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int scrub_m68k_mri;
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const char *mri_state;
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char mri_last_ch;
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};
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char *
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app_push ()
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{
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register struct app_save *saved;
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saved = (struct app_save *) xmalloc (sizeof (*saved));
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saved->state = state;
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saved->old_state = old_state;
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saved->out_string = out_string;
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memcpy (saved->out_buf, out_buf, sizeof (out_buf));
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saved->add_newlines = add_newlines;
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saved->saved_input = saved_input;
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saved->saved_input_len = saved_input_len;
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saved->scrub_m68k_mri = scrub_m68k_mri;
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saved->mri_state = mri_state;
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saved->mri_last_ch = mri_last_ch;
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/* do_scrub_begin() is not useful, just wastes time. */
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state = 0;
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saved_input = NULL;
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return (char *) saved;
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}
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void
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app_pop (arg)
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char *arg;
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{
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register struct app_save *saved = (struct app_save *) arg;
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/* There is no do_scrub_end (). */
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state = saved->state;
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old_state = saved->old_state;
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out_string = saved->out_string;
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memcpy (out_buf, saved->out_buf, sizeof (out_buf));
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add_newlines = saved->add_newlines;
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saved_input = saved->saved_input;
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saved_input_len = saved->saved_input_len;
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scrub_m68k_mri = saved->scrub_m68k_mri;
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mri_state = saved->mri_state;
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mri_last_ch = saved->mri_last_ch;
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free (arg);
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} /* app_pop() */
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/* @@ This assumes that \n &c are the same on host and target. This is not
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necessarily true. */
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static int
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process_escape (ch)
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int ch;
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{
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switch (ch)
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{
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case 'b':
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return '\b';
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case 'f':
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return '\f';
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case 'n':
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return '\n';
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case 'r':
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return '\r';
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case 't':
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return '\t';
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case '\'':
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return '\'';
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case '"':
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return '\"';
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default:
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return ch;
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}
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}
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/* This function is called to process input characters. The GET
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parameter is used to retrieve more input characters. GET should
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set its parameter to point to a buffer, and return the length of
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the buffer; it should return 0 at end of file. The scrubbed output
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characters are put into the buffer starting at TOSTART; the TOSTART
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buffer is TOLEN bytes in length. The function returns the number
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of scrubbed characters put into TOSTART. This will be TOLEN unless
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end of file was seen. This function is arranged as a state
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machine, and saves its state so that it may return at any point.
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This is the way the old code used to work. */
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int
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do_scrub_chars (get, tostart, tolen)
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int (*get) PARAMS ((char **));
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char *tostart;
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int tolen;
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{
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char *to = tostart;
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char *toend = tostart + tolen;
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char *from;
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char *fromend;
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int fromlen;
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register int ch, ch2 = 0;
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/*State 0: beginning of normal line
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1: After first whitespace on line (flush more white)
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2: After first non-white (opcode) on line (keep 1white)
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3: after second white on line (into operands) (flush white)
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4: after putting out a .line, put out digits
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5: parsing a string, then go to old-state
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6: putting out \ escape in a "d string.
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7: After putting out a .appfile, put out string.
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8: After putting out a .appfile string, flush until newline.
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9: After seeing symbol char in state 3 (keep 1white after symchar)
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10: After seeing whitespace in state 9 (keep white before symchar)
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11: After seeing a symbol character in state 0 (eg a label definition)
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-1: output string in out_string and go to the state in old_state
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-2: flush text until a '*' '/' is seen, then go to state old_state
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#ifdef TC_V850
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12: After seeing a dash, looking for a second dash as a start of comment.
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#endif
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#ifdef TC_M32R
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13: After seeing a vertical bar, looking for a second vertical bar as a parallel expression seperator.
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#endif
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*/
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/* I added states 9 and 10 because the MIPS ECOFF assembler uses
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constructs like ``.loc 1 20''. This was turning into ``.loc
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120''. States 9 and 10 ensure that a space is never dropped in
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between characters which could appear in a identifier. Ian
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Taylor, ian@cygnus.com.
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I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works
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correctly on the PA (and any other target where colons are optional).
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Jeff Law, law@cs.utah.edu.
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I added state 13 so that something like "cmp r1, r2 || trap #1" does not
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get squashed into "cmp r1,r2||trap#1", with the all important space
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between the 'trap' and the '#1' being eliminated. nickc@cygnus.com */
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/* This macro gets the next input character. */
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#define GET() \
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(from < fromend \
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? *from++ \
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: ((saved_input != NULL \
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? (free (saved_input), \
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saved_input = NULL, \
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0) \
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: 0), \
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fromlen = (*get) (&from), \
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fromend = from + fromlen, \
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(fromlen == 0 \
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? EOF \
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: *from++)))
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/* This macro pushes a character back on the input stream. */
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#define UNGET(uch) (*--from = (uch))
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/* This macro puts a character into the output buffer. If this
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character fills the output buffer, this macro jumps to the label
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TOFULL. We use this rather ugly approach because we need to
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handle two different termination conditions: EOF on the input
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stream, and a full output buffer. It would be simpler if we
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always read in the entire input stream before processing it, but
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I don't want to make such a significant change to the assembler's
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memory usage. */
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#define PUT(pch) \
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do \
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{ \
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*to++ = (pch); \
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if (to >= toend) \
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goto tofull; \
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} \
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while (0)
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if (saved_input != NULL)
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{
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from = saved_input;
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fromend = from + saved_input_len;
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}
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else
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{
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fromlen = (*get) (&from);
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if (fromlen == 0)
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return 0;
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fromend = from + fromlen;
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}
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while (1)
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{
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/* The cases in this switch end with continue, in order to
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branch back to the top of this while loop and generate the
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next output character in the appropriate state. */
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switch (state)
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{
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case -1:
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ch = *out_string++;
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if (*out_string == '\0')
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{
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state = old_state;
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old_state = 3;
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}
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PUT (ch);
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continue;
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case -2:
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for (;;)
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{
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do
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{
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ch = GET ();
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if (ch == EOF)
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{
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as_warn ("end of file in comment");
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goto fromeof;
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}
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if (ch == '\n')
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PUT ('\n');
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}
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while (ch != '*');
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while ((ch = GET ()) == '*')
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;
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if (ch == EOF)
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{
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as_warn ("end of file in comment");
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goto fromeof;
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}
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|
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if (ch == '/')
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break;
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UNGET (ch);
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}
|
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state = old_state;
|
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UNGET (' ');
|
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continue;
|
|
|
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case 4:
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ch = GET ();
|
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if (ch == EOF)
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|
goto fromeof;
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else if (ch >= '0' && ch <= '9')
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|
PUT (ch);
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else
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{
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while (ch != EOF && IS_WHITESPACE (ch))
|
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ch = GET ();
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if (ch == '"')
|
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{
|
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UNGET (ch);
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if (scrub_m68k_mri)
|
|
out_string = "\n\tappfile ";
|
|
else
|
|
out_string = "\n\t.appfile ";
|
|
old_state = 7;
|
|
state = -1;
|
|
PUT (*out_string++);
|
|
}
|
|
else
|
|
{
|
|
while (ch != EOF && ch != '\n')
|
|
ch = GET ();
|
|
state = 0;
|
|
PUT (ch);
|
|
}
|
|
}
|
|
continue;
|
|
|
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case 5:
|
|
/* We are going to copy everything up to a quote character,
|
|
with special handling for a backslash. We try to
|
|
optimize the copying in the simple case without using the
|
|
GET and PUT macros. */
|
|
{
|
|
char *s;
|
|
int len;
|
|
|
|
for (s = from; s < fromend; s++)
|
|
{
|
|
ch = *s;
|
|
/* This condition must be changed if the type of any
|
|
other character can be LEX_IS_STRINGQUOTE. */
|
|
if (ch == '\\'
|
|
|| ch == '"'
|
|
|| ch == '\''
|
|
|| ch == '\n')
|
|
break;
|
|
}
|
|
len = s - from;
|
|
if (len > toend - to)
|
|
len = toend - to;
|
|
if (len > 0)
|
|
{
|
|
memcpy (to, from, len);
|
|
to += len;
|
|
from += len;
|
|
}
|
|
}
|
|
|
|
ch = GET ();
|
|
if (ch == EOF)
|
|
{
|
|
as_warn ("end of file in string: inserted '\"'");
|
|
state = old_state;
|
|
UNGET ('\n');
|
|
PUT ('"');
|
|
}
|
|
else if (lex[ch] == LEX_IS_STRINGQUOTE)
|
|
{
|
|
state = old_state;
|
|
PUT (ch);
|
|
}
|
|
#ifndef NO_STRING_ESCAPES
|
|
else if (ch == '\\')
|
|
{
|
|
state = 6;
|
|
PUT (ch);
|
|
}
|
|
#endif
|
|
else if (scrub_m68k_mri && ch == '\n')
|
|
{
|
|
/* Just quietly terminate the string. This permits lines like
|
|
bne label loop if we haven't reach end yet
|
|
*/
|
|
state = old_state;
|
|
UNGET (ch);
|
|
PUT ('\'');
|
|
}
|
|
else
|
|
{
|
|
PUT (ch);
|
|
}
|
|
continue;
|
|
|
|
case 6:
|
|
state = 5;
|
|
ch = GET ();
|
|
switch (ch)
|
|
{
|
|
/* Handle strings broken across lines, by turning '\n' into
|
|
'\\' and 'n'. */
|
|
case '\n':
|
|
UNGET ('n');
|
|
add_newlines++;
|
|
PUT ('\\');
|
|
continue;
|
|
|
|
case '"':
|
|
case '\\':
|
|
case 'b':
|
|
case 'f':
|
|
case 'n':
|
|
case 'r':
|
|
case 't':
|
|
case 'v':
|
|
case 'x':
|
|
case 'X':
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
break;
|
|
#if defined(IGNORE_NONSTANDARD_ESCAPES) | defined(ONLY_STANDARD_ESCAPES)
|
|
default:
|
|
as_warn ("Unknown escape '\\%c' in string: Ignored", ch);
|
|
break;
|
|
#else /* ONLY_STANDARD_ESCAPES */
|
|
default:
|
|
/* Accept \x as x for any x */
|
|
break;
|
|
#endif /* ONLY_STANDARD_ESCAPES */
|
|
|
|
case EOF:
|
|
as_warn ("End of file in string: '\"' inserted");
|
|
PUT ('"');
|
|
continue;
|
|
}
|
|
PUT (ch);
|
|
continue;
|
|
|
|
case 7:
|
|
ch = GET ();
|
|
state = 5;
|
|
old_state = 8;
|
|
if (ch == EOF)
|
|
goto fromeof;
|
|
PUT (ch);
|
|
continue;
|
|
|
|
case 8:
|
|
do
|
|
ch = GET ();
|
|
while (ch != '\n' && ch != EOF);
|
|
if (ch == EOF)
|
|
goto fromeof;
|
|
state = 0;
|
|
PUT (ch);
|
|
continue;
|
|
}
|
|
|
|
/* OK, we are somewhere in states 0 through 4 or 9 through 11 */
|
|
|
|
/* flushchar: */
|
|
ch = GET ();
|
|
|
|
recycle:
|
|
|
|
#ifdef TC_M68K
|
|
/* We want to have pseudo-ops which control whether we are in
|
|
MRI mode or not. Unfortunately, since m68k MRI mode affects
|
|
the scrubber, that means that we need a special purpose
|
|
recognizer here. */
|
|
if (mri_state == NULL)
|
|
{
|
|
if ((state == 0 || state == 1)
|
|
&& ch == mri_pseudo[0])
|
|
mri_state = mri_pseudo + 1;
|
|
}
|
|
else
|
|
{
|
|
/* We advance to the next state if we find the right
|
|
character, or if we need a space character and we get any
|
|
whitespace character, or if we need a '0' and we get a
|
|
'1' (this is so that we only need one state to handle
|
|
``.mri 0'' and ``.mri 1''). */
|
|
if (ch != '\0'
|
|
&& (*mri_state == ch
|
|
|| (*mri_state == ' '
|
|
&& lex[ch] == LEX_IS_WHITESPACE)
|
|
|| (*mri_state == '0'
|
|
&& ch == '1')))
|
|
{
|
|
mri_last_ch = ch;
|
|
++mri_state;
|
|
}
|
|
else if (*mri_state != '\0'
|
|
|| (lex[ch] != LEX_IS_WHITESPACE
|
|
&& lex[ch] != LEX_IS_NEWLINE))
|
|
{
|
|
/* We did not get the expected character, or we didn't
|
|
get a valid terminating character after seeing the
|
|
entire pseudo-op, so we must go back to the
|
|
beginning. */
|
|
mri_state = NULL;
|
|
}
|
|
else
|
|
{
|
|
/* We've read the entire pseudo-op. mips_last_ch is
|
|
either '0' or '1' indicating whether to enter or
|
|
leave MRI mode. */
|
|
do_scrub_begin (mri_last_ch == '1');
|
|
mri_state = NULL;
|
|
|
|
/* We continue handling the character as usual. The
|
|
main gas reader must also handle the .mri pseudo-op
|
|
to control expression parsing and the like. */
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (ch == EOF)
|
|
{
|
|
if (state != 0)
|
|
{
|
|
as_warn ("end of file not at end of a line; newline inserted");
|
|
state = 0;
|
|
PUT ('\n');
|
|
}
|
|
goto fromeof;
|
|
}
|
|
|
|
switch (lex[ch])
|
|
{
|
|
case LEX_IS_WHITESPACE:
|
|
do
|
|
{
|
|
ch = GET ();
|
|
}
|
|
while (ch != EOF && IS_WHITESPACE (ch));
|
|
if (ch == EOF)
|
|
goto fromeof;
|
|
|
|
if (state == 0)
|
|
{
|
|
/* Preserve a single whitespace character at the
|
|
beginning of a line. */
|
|
state = 1;
|
|
UNGET (ch);
|
|
PUT (' ');
|
|
break;
|
|
}
|
|
|
|
if (IS_COMMENT (ch)
|
|
|| ch == '/'
|
|
|| IS_LINE_SEPARATOR (ch))
|
|
{
|
|
if (scrub_m68k_mri)
|
|
{
|
|
/* In MRI mode, we keep these spaces. */
|
|
UNGET (ch);
|
|
PUT (' ');
|
|
break;
|
|
}
|
|
goto recycle;
|
|
}
|
|
|
|
/* If we're in state 2 or 11, we've seen a non-white
|
|
character followed by whitespace. If the next character
|
|
is ':', this is whitespace after a label name which we
|
|
normally must ignore. In MRI mode, though, spaces are
|
|
not permitted between the label and the colon. */
|
|
if ((state == 2 || state == 11)
|
|
&& lex[ch] == LEX_IS_COLON
|
|
&& ! scrub_m68k_mri)
|
|
{
|
|
state = 1;
|
|
PUT (ch);
|
|
break;
|
|
}
|
|
|
|
switch (state)
|
|
{
|
|
case 0:
|
|
state++;
|
|
goto recycle; /* Punted leading sp */
|
|
case 1:
|
|
/* We can arrive here if we leave a leading whitespace
|
|
character at the beginning of a line. */
|
|
goto recycle;
|
|
case 2:
|
|
state = 3;
|
|
if (to + 1 < toend)
|
|
{
|
|
/* Optimize common case by skipping UNGET/GET. */
|
|
PUT (' '); /* Sp after opco */
|
|
goto recycle;
|
|
}
|
|
UNGET (ch);
|
|
PUT (' ');
|
|
break;
|
|
case 3:
|
|
if (scrub_m68k_mri)
|
|
{
|
|
/* In MRI mode, we keep these spaces. */
|
|
UNGET (ch);
|
|
PUT (' ');
|
|
break;
|
|
}
|
|
goto recycle; /* Sp in operands */
|
|
case 9:
|
|
case 10:
|
|
if (scrub_m68k_mri)
|
|
{
|
|
/* In MRI mode, we keep these spaces. */
|
|
state = 3;
|
|
UNGET (ch);
|
|
PUT (' ');
|
|
break;
|
|
}
|
|
state = 10; /* Sp after symbol char */
|
|
goto recycle;
|
|
case 11:
|
|
if (flag_m68k_mri
|
|
#ifdef LABELS_WITHOUT_COLONS
|
|
|| 1
|
|
#endif
|
|
)
|
|
state = 1;
|
|
else
|
|
{
|
|
/* We know that ch is not ':', since we tested that
|
|
case above. Therefore this is not a label, so it
|
|
must be the opcode, and we've just seen the
|
|
whitespace after it. */
|
|
state = 3;
|
|
}
|
|
UNGET (ch);
|
|
PUT (' '); /* Sp after label definition. */
|
|
break;
|
|
default:
|
|
BAD_CASE (state);
|
|
}
|
|
break;
|
|
|
|
case LEX_IS_TWOCHAR_COMMENT_1ST:
|
|
ch2 = GET ();
|
|
if (ch2 == '*')
|
|
{
|
|
for (;;)
|
|
{
|
|
do
|
|
{
|
|
ch2 = GET ();
|
|
if (ch2 != EOF && IS_NEWLINE (ch2))
|
|
add_newlines++;
|
|
}
|
|
while (ch2 != EOF && ch2 != '*');
|
|
|
|
while (ch2 == '*')
|
|
ch2 = GET ();
|
|
|
|
if (ch2 == EOF || ch2 == '/')
|
|
break;
|
|
|
|
/* This UNGET will ensure that we count newlines
|
|
correctly. */
|
|
UNGET (ch2);
|
|
}
|
|
|
|
if (ch2 == EOF)
|
|
as_warn ("end of file in multiline comment");
|
|
|
|
ch = ' ';
|
|
goto recycle;
|
|
}
|
|
else
|
|
{
|
|
if (ch2 != EOF)
|
|
UNGET (ch2);
|
|
if (state == 9 || state == 10)
|
|
state = 3;
|
|
PUT (ch);
|
|
}
|
|
break;
|
|
|
|
case LEX_IS_STRINGQUOTE:
|
|
if (state == 10)
|
|
{
|
|
/* Preserve the whitespace in foo "bar" */
|
|
UNGET (ch);
|
|
state = 3;
|
|
PUT (' ');
|
|
|
|
/* PUT didn't jump out. We could just break, but we
|
|
know what will happen, so optimize a bit. */
|
|
ch = GET ();
|
|
old_state = 3;
|
|
}
|
|
else if (state == 9)
|
|
old_state = 3;
|
|
else
|
|
old_state = state;
|
|
state = 5;
|
|
PUT (ch);
|
|
break;
|
|
|
|
#ifndef IEEE_STYLE
|
|
case LEX_IS_ONECHAR_QUOTE:
|
|
if (state == 10)
|
|
{
|
|
/* Preserve the whitespace in foo 'b' */
|
|
UNGET (ch);
|
|
state = 3;
|
|
PUT (' ');
|
|
break;
|
|
}
|
|
ch = GET ();
|
|
if (ch == EOF)
|
|
{
|
|
as_warn ("end of file after a one-character quote; \\0 inserted");
|
|
ch = 0;
|
|
}
|
|
if (ch == '\\')
|
|
{
|
|
ch = GET ();
|
|
if (ch == EOF)
|
|
{
|
|
as_warn ("end of file in escape character");
|
|
ch = '\\';
|
|
}
|
|
else
|
|
ch = process_escape (ch);
|
|
}
|
|
sprintf (out_buf, "%d", (int) (unsigned char) ch);
|
|
|
|
/* None of these 'x constants for us. We want 'x'. */
|
|
if ((ch = GET ()) != '\'')
|
|
{
|
|
#ifdef REQUIRE_CHAR_CLOSE_QUOTE
|
|
as_warn ("Missing close quote: (assumed)");
|
|
#else
|
|
if (ch != EOF)
|
|
UNGET (ch);
|
|
#endif
|
|
}
|
|
if (strlen (out_buf) == 1)
|
|
{
|
|
PUT (out_buf[0]);
|
|
break;
|
|
}
|
|
if (state == 9)
|
|
old_state = 3;
|
|
else
|
|
old_state = state;
|
|
state = -1;
|
|
out_string = out_buf;
|
|
PUT (*out_string++);
|
|
break;
|
|
#endif
|
|
|
|
case LEX_IS_COLON:
|
|
if (state == 9 || state == 10)
|
|
state = 3;
|
|
else if (state != 3)
|
|
state = 1;
|
|
PUT (ch);
|
|
break;
|
|
|
|
case LEX_IS_NEWLINE:
|
|
/* Roll out a bunch of newlines from inside comments, etc. */
|
|
if (add_newlines)
|
|
{
|
|
--add_newlines;
|
|
UNGET (ch);
|
|
}
|
|
/* fall thru into... */
|
|
|
|
case LEX_IS_LINE_SEPARATOR:
|
|
state = 0;
|
|
PUT (ch);
|
|
break;
|
|
|
|
#ifdef TC_V850
|
|
case LEX_IS_DOUBLEDASH_1ST:
|
|
ch2 = GET();
|
|
if (ch2 != '-')
|
|
{
|
|
UNGET (ch2);
|
|
goto de_fault;
|
|
}
|
|
/* read and skip to end of line */
|
|
do
|
|
{
|
|
ch = GET ();
|
|
}
|
|
while (ch != EOF && ch != '\n');
|
|
if (ch == EOF)
|
|
{
|
|
as_warn ("end of file in comment; newline inserted");
|
|
}
|
|
state = 0;
|
|
PUT ('\n');
|
|
break;
|
|
#endif
|
|
#ifdef TC_M32R
|
|
case LEX_IS_DOUBLEBAR_1ST:
|
|
ch2 = GET();
|
|
if (ch2 != '|')
|
|
{
|
|
UNGET (ch2);
|
|
goto de_fault;
|
|
}
|
|
/* Reset back to state 1 and pretend that we are parsing a line from
|
|
just after the first white space. */
|
|
state = 1;
|
|
PUT ('|');
|
|
PUT ('|');
|
|
break;
|
|
#endif
|
|
case LEX_IS_LINE_COMMENT_START:
|
|
/* FIXME-someday: The two character comment stuff was badly
|
|
thought out. On i386, we want '/' as line comment start
|
|
AND we want C style comments. hence this hack. The
|
|
whole lexical process should be reworked. xoxorich. */
|
|
if (ch == '/')
|
|
{
|
|
ch2 = GET ();
|
|
if (ch2 == '*')
|
|
{
|
|
old_state = 3;
|
|
state = -2;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
UNGET (ch2);
|
|
}
|
|
} /* bad hack */
|
|
|
|
if (state == 0 || state == 1) /* Only comment at start of line. */
|
|
{
|
|
int startch;
|
|
|
|
startch = ch;
|
|
|
|
do
|
|
{
|
|
ch = GET ();
|
|
}
|
|
while (ch != EOF && IS_WHITESPACE (ch));
|
|
if (ch == EOF)
|
|
{
|
|
as_warn ("end of file in comment; newline inserted");
|
|
PUT ('\n');
|
|
break;
|
|
}
|
|
if (ch < '0' || ch > '9' || state != 0 || startch != '#')
|
|
{
|
|
/* Not a cpp line. */
|
|
while (ch != EOF && !IS_NEWLINE (ch))
|
|
ch = GET ();
|
|
if (ch == EOF)
|
|
as_warn ("EOF in Comment: Newline inserted");
|
|
state = 0;
|
|
PUT ('\n');
|
|
break;
|
|
}
|
|
/* Loks like `# 123 "filename"' from cpp. */
|
|
UNGET (ch);
|
|
old_state = 4;
|
|
state = -1;
|
|
if (scrub_m68k_mri)
|
|
out_string = "\tappline ";
|
|
else
|
|
out_string = "\t.appline ";
|
|
PUT (*out_string++);
|
|
break;
|
|
}
|
|
|
|
#ifdef TC_D10V
|
|
/* All insns end in a char for which LEX_IS_SYMBOL_COMPONENT is true.
|
|
Trap is the only short insn that has a first operand that is
|
|
neither register nor label.
|
|
We must prevent exef0f ||trap #1 to degenerate to exef0f ||trap#1 .
|
|
We can't make '#' LEX_IS_SYMBOL_COMPONENT because it is already
|
|
LEX_IS_LINE_COMMENT_START. However, it is the only character in
|
|
line_comment_chars for d10v, hence we can recognize it as such. */
|
|
/* An alternative approach would be to reset the state to 1 when
|
|
we see '||', '<'- or '->', but that seems to be overkill. */
|
|
if (state == 10) PUT (' ');
|
|
#endif
|
|
/* We have a line comment character which is not at the
|
|
start of a line. If this is also a normal comment
|
|
character, fall through. Otherwise treat it as a default
|
|
character. */
|
|
if (strchr (tc_comment_chars, ch) == NULL
|
|
&& (! scrub_m68k_mri
|
|
|| (ch != '!' && ch != '*')))
|
|
goto de_fault;
|
|
if (scrub_m68k_mri
|
|
&& (ch == '!' || ch == '*' || ch == '#')
|
|
&& state != 1
|
|
&& state != 10)
|
|
goto de_fault;
|
|
/* Fall through. */
|
|
case LEX_IS_COMMENT_START:
|
|
do
|
|
{
|
|
ch = GET ();
|
|
}
|
|
while (ch != EOF && !IS_NEWLINE (ch));
|
|
if (ch == EOF)
|
|
as_warn ("end of file in comment; newline inserted");
|
|
state = 0;
|
|
PUT ('\n');
|
|
break;
|
|
|
|
case LEX_IS_SYMBOL_COMPONENT:
|
|
if (state == 10)
|
|
{
|
|
/* This is a symbol character following another symbol
|
|
character, with whitespace in between. We skipped
|
|
the whitespace earlier, so output it now. */
|
|
UNGET (ch);
|
|
state = 3;
|
|
PUT (' ');
|
|
break;
|
|
}
|
|
|
|
if (state == 3)
|
|
state = 9;
|
|
|
|
/* This is a common case. Quickly copy CH and all the
|
|
following symbol component or normal characters. */
|
|
if (to + 1 < toend && mri_state == NULL)
|
|
{
|
|
char *s;
|
|
int len;
|
|
|
|
for (s = from; s < fromend; s++)
|
|
{
|
|
int type;
|
|
|
|
ch2 = *s;
|
|
type = lex[ch2];
|
|
if (type != 0
|
|
&& type != LEX_IS_SYMBOL_COMPONENT)
|
|
break;
|
|
}
|
|
if (s > from)
|
|
{
|
|
/* Handle the last character normally, for
|
|
simplicity. */
|
|
--s;
|
|
}
|
|
len = s - from;
|
|
if (len > (toend - to) - 1)
|
|
len = (toend - to) - 1;
|
|
if (len > 0)
|
|
{
|
|
PUT (ch);
|
|
if (len > 8)
|
|
{
|
|
memcpy (to, from, len);
|
|
to += len;
|
|
from += len;
|
|
}
|
|
else
|
|
{
|
|
switch (len)
|
|
{
|
|
case 8: *to++ = *from++;
|
|
case 7: *to++ = *from++;
|
|
case 6: *to++ = *from++;
|
|
case 5: *to++ = *from++;
|
|
case 4: *to++ = *from++;
|
|
case 3: *to++ = *from++;
|
|
case 2: *to++ = *from++;
|
|
case 1: *to++ = *from++;
|
|
}
|
|
}
|
|
ch = GET ();
|
|
}
|
|
}
|
|
|
|
/* Fall through. */
|
|
default:
|
|
de_fault:
|
|
/* Some relatively `normal' character. */
|
|
if (state == 0)
|
|
{
|
|
state = 11; /* Now seeing label definition */
|
|
}
|
|
else if (state == 1)
|
|
{
|
|
state = 2; /* Ditto */
|
|
}
|
|
else if (state == 9)
|
|
{
|
|
if (lex[ch] != LEX_IS_SYMBOL_COMPONENT)
|
|
state = 3;
|
|
}
|
|
else if (state == 10)
|
|
{
|
|
state = 3;
|
|
}
|
|
PUT (ch);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*NOTREACHED*/
|
|
|
|
fromeof:
|
|
/* We have reached the end of the input. */
|
|
return to - tostart;
|
|
|
|
tofull:
|
|
/* The output buffer is full. Save any input we have not yet
|
|
processed. */
|
|
if (fromend > from)
|
|
{
|
|
char *save;
|
|
|
|
save = (char *) xmalloc (fromend - from);
|
|
memcpy (save, from, fromend - from);
|
|
if (saved_input != NULL)
|
|
free (saved_input);
|
|
saved_input = save;
|
|
saved_input_len = fromend - from;
|
|
}
|
|
else
|
|
{
|
|
if (saved_input != NULL)
|
|
{
|
|
free (saved_input);
|
|
saved_input = NULL;
|
|
}
|
|
}
|
|
return to - tostart;
|
|
}
|
|
|
|
/* end of app.c */
|