1435 lines
38 KiB
C
1435 lines
38 KiB
C
/* Lexical analyzer for C and Objective C.
|
||
Copyright (C) 1987, 1988, 1989, 1992, 1994, 1995, 1996, 1997
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1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of GCC.
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||
GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
|
||
Software Foundation; either version 2, or (at your option) any later
|
||
version.
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||
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||
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||
for more details.
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||
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You should have received a copy of the GNU General Public License
|
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along with GCC; 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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#include "config.h"
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#include "system.h"
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#include "rtl.h"
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#include "tree.h"
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#include "expr.h"
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#include "input.h"
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#include "output.h"
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#include "c-lex.h"
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#include "c-tree.h"
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#include "flags.h"
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#include "timevar.h"
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#include "cpplib.h"
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#include "c-pragma.h"
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#include "toplev.h"
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#include "intl.h"
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#include "tm_p.h"
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#include "splay-tree.h"
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#include "debug.h"
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/* MULTIBYTE_CHARS support only works for native compilers.
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??? Ideally what we want is to model widechar support after
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the current floating point support. */
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#ifdef CROSS_COMPILE
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#undef MULTIBYTE_CHARS
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#endif
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#ifdef MULTIBYTE_CHARS
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#include "mbchar.h"
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#include <locale.h>
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#endif /* MULTIBYTE_CHARS */
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#ifndef GET_ENVIRONMENT
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#define GET_ENVIRONMENT(ENV_VALUE,ENV_NAME) ((ENV_VALUE) = getenv (ENV_NAME))
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#endif
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/* The current line map. */
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static const struct line_map *map;
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/* The line used to refresh the lineno global variable after each token. */
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static unsigned int src_lineno;
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/* We may keep statistics about how long which files took to compile. */
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static int header_time, body_time;
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static splay_tree file_info_tree;
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/* Cause the `yydebug' variable to be defined. */
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#define YYDEBUG 1
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/* File used for outputting assembler code. */
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extern FILE *asm_out_file;
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE TYPE_PRECISION (wchar_type_node)
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/* Number of bytes in a wide character. */
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#define WCHAR_BYTES (WCHAR_TYPE_SIZE / BITS_PER_UNIT)
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int indent_level; /* Number of { minus number of }. */
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int pending_lang_change; /* If we need to switch languages - C++ only */
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int c_header_level; /* depth in C headers - C++ only */
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/* Nonzero tells yylex to ignore \ in string constants. */
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static int ignore_escape_flag;
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static void parse_float PARAMS ((PTR));
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static tree lex_number PARAMS ((const char *, unsigned int));
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static tree lex_string PARAMS ((const char *, unsigned int, int));
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static tree lex_charconst PARAMS ((const cpp_token *));
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static void update_header_times PARAMS ((const char *));
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static int dump_one_header PARAMS ((splay_tree_node, void *));
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static void cb_line_change PARAMS ((cpp_reader *, const cpp_token *, int));
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static void cb_ident PARAMS ((cpp_reader *, unsigned int,
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const cpp_string *));
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static void cb_file_change PARAMS ((cpp_reader *, const struct line_map *));
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static void cb_def_pragma PARAMS ((cpp_reader *, unsigned int));
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static void cb_define PARAMS ((cpp_reader *, unsigned int,
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cpp_hashnode *));
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static void cb_undef PARAMS ((cpp_reader *, unsigned int,
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cpp_hashnode *));
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const char *
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init_c_lex (filename)
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const char *filename;
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{
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struct cpp_callbacks *cb;
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struct c_fileinfo *toplevel;
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/* Set up filename timing. Must happen before cpp_read_main_file. */
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file_info_tree = splay_tree_new ((splay_tree_compare_fn)strcmp,
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0,
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(splay_tree_delete_value_fn)free);
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toplevel = get_fileinfo ("<top level>");
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if (flag_detailed_statistics)
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{
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header_time = 0;
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body_time = get_run_time ();
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toplevel->time = body_time;
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}
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#ifdef MULTIBYTE_CHARS
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/* Change to the native locale for multibyte conversions. */
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setlocale (LC_CTYPE, "");
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GET_ENVIRONMENT (literal_codeset, "LANG");
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#endif
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cb = cpp_get_callbacks (parse_in);
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cb->line_change = cb_line_change;
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cb->ident = cb_ident;
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cb->file_change = cb_file_change;
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cb->def_pragma = cb_def_pragma;
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/* Set the debug callbacks if we can use them. */
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if (debug_info_level == DINFO_LEVEL_VERBOSE
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&& (write_symbols == DWARF_DEBUG || write_symbols == DWARF2_DEBUG
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|| write_symbols == VMS_AND_DWARF2_DEBUG))
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{
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cb->define = cb_define;
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cb->undef = cb_undef;
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}
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/* Start it at 0. */
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lineno = 0;
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if (filename == NULL || !strcmp (filename, "-"))
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filename = "";
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return cpp_read_main_file (parse_in, filename, ident_hash);
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}
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/* A thin wrapper around the real parser that initializes the
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integrated preprocessor after debug output has been initialized.
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Also, make sure the start_source_file debug hook gets called for
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the primary source file. */
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int
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yyparse()
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{
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(*debug_hooks->start_source_file) (lineno, input_filename);
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cpp_finish_options (parse_in);
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return yyparse_1();
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}
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struct c_fileinfo *
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get_fileinfo (name)
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const char *name;
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{
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splay_tree_node n;
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struct c_fileinfo *fi;
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n = splay_tree_lookup (file_info_tree, (splay_tree_key) name);
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if (n)
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return (struct c_fileinfo *) n->value;
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fi = (struct c_fileinfo *) xmalloc (sizeof (struct c_fileinfo));
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fi->time = 0;
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fi->interface_only = 0;
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fi->interface_unknown = 1;
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splay_tree_insert (file_info_tree, (splay_tree_key) name,
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(splay_tree_value) fi);
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return fi;
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}
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static void
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update_header_times (name)
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const char *name;
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{
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/* Changing files again. This means currently collected time
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is charged against header time, and body time starts back at 0. */
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if (flag_detailed_statistics)
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{
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int this_time = get_run_time ();
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struct c_fileinfo *file = get_fileinfo (name);
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header_time += this_time - body_time;
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file->time += this_time - body_time;
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body_time = this_time;
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}
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}
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static int
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dump_one_header (n, dummy)
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splay_tree_node n;
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void *dummy ATTRIBUTE_UNUSED;
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{
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print_time ((const char *) n->key,
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((struct c_fileinfo *) n->value)->time);
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return 0;
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}
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void
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dump_time_statistics ()
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{
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struct c_fileinfo *file = get_fileinfo (input_filename);
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int this_time = get_run_time ();
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file->time += this_time - body_time;
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fprintf (stderr, "\n******\n");
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print_time ("header files (total)", header_time);
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print_time ("main file (total)", this_time - body_time);
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fprintf (stderr, "ratio = %g : 1\n",
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(double)header_time / (double)(this_time - body_time));
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fprintf (stderr, "\n******\n");
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splay_tree_foreach (file_info_tree, dump_one_header, 0);
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}
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/* Not yet handled: #pragma, #define, #undef.
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No need to deal with linemarkers under normal conditions. */
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static void
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cb_ident (pfile, line, str)
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cpp_reader *pfile ATTRIBUTE_UNUSED;
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unsigned int line ATTRIBUTE_UNUSED;
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const cpp_string *str ATTRIBUTE_UNUSED;
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{
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#ifdef ASM_OUTPUT_IDENT
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if (! flag_no_ident)
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{
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/* Convert escapes in the string. */
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tree value = lex_string ((const char *)str->text, str->len, 0);
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ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (value));
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}
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#endif
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}
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/* Called at the start of every non-empty line. TOKEN is the first
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lexed token on the line. Used for diagnostic line numbers. */
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static void
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cb_line_change (pfile, token, parsing_args)
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cpp_reader *pfile ATTRIBUTE_UNUSED;
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const cpp_token *token;
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int parsing_args ATTRIBUTE_UNUSED;
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{
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src_lineno = SOURCE_LINE (map, token->line);
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}
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static void
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cb_file_change (pfile, new_map)
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cpp_reader *pfile ATTRIBUTE_UNUSED;
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const struct line_map *new_map;
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{
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unsigned int to_line = SOURCE_LINE (new_map, new_map->to_line);
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if (new_map->reason == LC_ENTER)
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{
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/* Don't stack the main buffer on the input stack;
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we already did in compile_file. */
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if (map == NULL)
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main_input_filename = new_map->to_file;
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else
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{
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lineno = SOURCE_LINE (new_map - 1, new_map->from_line - 1);
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push_srcloc (new_map->to_file, 1);
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input_file_stack->indent_level = indent_level;
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(*debug_hooks->start_source_file) (lineno, new_map->to_file);
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#ifndef NO_IMPLICIT_EXTERN_C
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if (c_header_level)
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++c_header_level;
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else if (new_map->sysp == 2)
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{
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c_header_level = 1;
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++pending_lang_change;
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}
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#endif
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}
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}
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else if (new_map->reason == LC_LEAVE)
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{
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#ifndef NO_IMPLICIT_EXTERN_C
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if (c_header_level && --c_header_level == 0)
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{
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if (new_map->sysp == 2)
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warning ("badly nested C headers from preprocessor");
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--pending_lang_change;
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}
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#endif
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#if 0
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if (indent_level != input_file_stack->indent_level)
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{
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warning_with_file_and_line
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(input_filename, lineno,
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"this file contains more '%c's than '%c's",
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indent_level > input_file_stack->indent_level ? '{' : '}',
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indent_level > input_file_stack->indent_level ? '}' : '{');
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}
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#endif
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pop_srcloc ();
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(*debug_hooks->end_source_file) (to_line);
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}
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update_header_times (new_map->to_file);
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in_system_header = new_map->sysp != 0;
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input_filename = new_map->to_file;
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lineno = to_line;
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map = new_map;
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||
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||
/* Hook for C++. */
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extract_interface_info ();
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}
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||
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static void
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cb_def_pragma (pfile, line)
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cpp_reader *pfile;
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unsigned int line;
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{
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/* Issue a warning message if we have been asked to do so. Ignore
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unknown pragmas in system headers unless an explicit
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-Wunknown-pragmas has been given. */
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if (warn_unknown_pragmas > in_system_header)
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{
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const unsigned char *space, *name = 0;
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const cpp_token *s;
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||
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s = cpp_get_token (pfile);
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space = cpp_token_as_text (pfile, s);
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s = cpp_get_token (pfile);
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if (s->type == CPP_NAME)
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name = cpp_token_as_text (pfile, s);
|
||
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lineno = SOURCE_LINE (map, line);
|
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if (name)
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warning ("ignoring #pragma %s %s", space, name);
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else
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warning ("ignoring #pragma %s", space);
|
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}
|
||
}
|
||
|
||
/* #define callback for DWARF and DWARF2 debug info. */
|
||
static void
|
||
cb_define (pfile, line, node)
|
||
cpp_reader *pfile;
|
||
unsigned int line;
|
||
cpp_hashnode *node;
|
||
{
|
||
(*debug_hooks->define) (SOURCE_LINE (map, line),
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(const char *) cpp_macro_definition (pfile, node));
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||
}
|
||
|
||
/* #undef callback for DWARF and DWARF2 debug info. */
|
||
static void
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||
cb_undef (pfile, line, node)
|
||
cpp_reader *pfile ATTRIBUTE_UNUSED;
|
||
unsigned int line;
|
||
cpp_hashnode *node;
|
||
{
|
||
(*debug_hooks->undef) (SOURCE_LINE (map, line),
|
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(const char *) NODE_NAME (node));
|
||
}
|
||
|
||
#if 0 /* not yet */
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||
/* Returns nonzero if C is a universal-character-name. Give an error if it
|
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is not one which may appear in an identifier, as per [extendid].
|
||
|
||
Note that extended character support in identifiers has not yet been
|
||
implemented. It is my personal opinion that this is not a desirable
|
||
feature. Portable code cannot count on support for more than the basic
|
||
identifier character set. */
|
||
|
||
static inline int
|
||
is_extended_char (c)
|
||
int c;
|
||
{
|
||
#ifdef TARGET_EBCDIC
|
||
return 0;
|
||
#else
|
||
/* ASCII. */
|
||
if (c < 0x7f)
|
||
return 0;
|
||
|
||
/* None of the valid chars are outside the Basic Multilingual Plane (the
|
||
low 16 bits). */
|
||
if (c > 0xffff)
|
||
{
|
||
error ("universal-character-name '\\U%08x' not valid in identifier", c);
|
||
return 1;
|
||
}
|
||
|
||
/* Latin */
|
||
if ((c >= 0x00c0 && c <= 0x00d6)
|
||
|| (c >= 0x00d8 && c <= 0x00f6)
|
||
|| (c >= 0x00f8 && c <= 0x01f5)
|
||
|| (c >= 0x01fa && c <= 0x0217)
|
||
|| (c >= 0x0250 && c <= 0x02a8)
|
||
|| (c >= 0x1e00 && c <= 0x1e9a)
|
||
|| (c >= 0x1ea0 && c <= 0x1ef9))
|
||
return 1;
|
||
|
||
/* Greek */
|
||
if ((c == 0x0384)
|
||
|| (c >= 0x0388 && c <= 0x038a)
|
||
|| (c == 0x038c)
|
||
|| (c >= 0x038e && c <= 0x03a1)
|
||
|| (c >= 0x03a3 && c <= 0x03ce)
|
||
|| (c >= 0x03d0 && c <= 0x03d6)
|
||
|| (c == 0x03da)
|
||
|| (c == 0x03dc)
|
||
|| (c == 0x03de)
|
||
|| (c == 0x03e0)
|
||
|| (c >= 0x03e2 && c <= 0x03f3)
|
||
|| (c >= 0x1f00 && c <= 0x1f15)
|
||
|| (c >= 0x1f18 && c <= 0x1f1d)
|
||
|| (c >= 0x1f20 && c <= 0x1f45)
|
||
|| (c >= 0x1f48 && c <= 0x1f4d)
|
||
|| (c >= 0x1f50 && c <= 0x1f57)
|
||
|| (c == 0x1f59)
|
||
|| (c == 0x1f5b)
|
||
|| (c == 0x1f5d)
|
||
|| (c >= 0x1f5f && c <= 0x1f7d)
|
||
|| (c >= 0x1f80 && c <= 0x1fb4)
|
||
|| (c >= 0x1fb6 && c <= 0x1fbc)
|
||
|| (c >= 0x1fc2 && c <= 0x1fc4)
|
||
|| (c >= 0x1fc6 && c <= 0x1fcc)
|
||
|| (c >= 0x1fd0 && c <= 0x1fd3)
|
||
|| (c >= 0x1fd6 && c <= 0x1fdb)
|
||
|| (c >= 0x1fe0 && c <= 0x1fec)
|
||
|| (c >= 0x1ff2 && c <= 0x1ff4)
|
||
|| (c >= 0x1ff6 && c <= 0x1ffc))
|
||
return 1;
|
||
|
||
/* Cyrillic */
|
||
if ((c >= 0x0401 && c <= 0x040d)
|
||
|| (c >= 0x040f && c <= 0x044f)
|
||
|| (c >= 0x0451 && c <= 0x045c)
|
||
|| (c >= 0x045e && c <= 0x0481)
|
||
|| (c >= 0x0490 && c <= 0x04c4)
|
||
|| (c >= 0x04c7 && c <= 0x04c8)
|
||
|| (c >= 0x04cb && c <= 0x04cc)
|
||
|| (c >= 0x04d0 && c <= 0x04eb)
|
||
|| (c >= 0x04ee && c <= 0x04f5)
|
||
|| (c >= 0x04f8 && c <= 0x04f9))
|
||
return 1;
|
||
|
||
/* Armenian */
|
||
if ((c >= 0x0531 && c <= 0x0556)
|
||
|| (c >= 0x0561 && c <= 0x0587))
|
||
return 1;
|
||
|
||
/* Hebrew */
|
||
if ((c >= 0x05d0 && c <= 0x05ea)
|
||
|| (c >= 0x05f0 && c <= 0x05f4))
|
||
return 1;
|
||
|
||
/* Arabic */
|
||
if ((c >= 0x0621 && c <= 0x063a)
|
||
|| (c >= 0x0640 && c <= 0x0652)
|
||
|| (c >= 0x0670 && c <= 0x06b7)
|
||
|| (c >= 0x06ba && c <= 0x06be)
|
||
|| (c >= 0x06c0 && c <= 0x06ce)
|
||
|| (c >= 0x06e5 && c <= 0x06e7))
|
||
return 1;
|
||
|
||
/* Devanagari */
|
||
if ((c >= 0x0905 && c <= 0x0939)
|
||
|| (c >= 0x0958 && c <= 0x0962))
|
||
return 1;
|
||
|
||
/* Bengali */
|
||
if ((c >= 0x0985 && c <= 0x098c)
|
||
|| (c >= 0x098f && c <= 0x0990)
|
||
|| (c >= 0x0993 && c <= 0x09a8)
|
||
|| (c >= 0x09aa && c <= 0x09b0)
|
||
|| (c == 0x09b2)
|
||
|| (c >= 0x09b6 && c <= 0x09b9)
|
||
|| (c >= 0x09dc && c <= 0x09dd)
|
||
|| (c >= 0x09df && c <= 0x09e1)
|
||
|| (c >= 0x09f0 && c <= 0x09f1))
|
||
return 1;
|
||
|
||
/* Gurmukhi */
|
||
if ((c >= 0x0a05 && c <= 0x0a0a)
|
||
|| (c >= 0x0a0f && c <= 0x0a10)
|
||
|| (c >= 0x0a13 && c <= 0x0a28)
|
||
|| (c >= 0x0a2a && c <= 0x0a30)
|
||
|| (c >= 0x0a32 && c <= 0x0a33)
|
||
|| (c >= 0x0a35 && c <= 0x0a36)
|
||
|| (c >= 0x0a38 && c <= 0x0a39)
|
||
|| (c >= 0x0a59 && c <= 0x0a5c)
|
||
|| (c == 0x0a5e))
|
||
return 1;
|
||
|
||
/* Gujarati */
|
||
if ((c >= 0x0a85 && c <= 0x0a8b)
|
||
|| (c == 0x0a8d)
|
||
|| (c >= 0x0a8f && c <= 0x0a91)
|
||
|| (c >= 0x0a93 && c <= 0x0aa8)
|
||
|| (c >= 0x0aaa && c <= 0x0ab0)
|
||
|| (c >= 0x0ab2 && c <= 0x0ab3)
|
||
|| (c >= 0x0ab5 && c <= 0x0ab9)
|
||
|| (c == 0x0ae0))
|
||
return 1;
|
||
|
||
/* Oriya */
|
||
if ((c >= 0x0b05 && c <= 0x0b0c)
|
||
|| (c >= 0x0b0f && c <= 0x0b10)
|
||
|| (c >= 0x0b13 && c <= 0x0b28)
|
||
|| (c >= 0x0b2a && c <= 0x0b30)
|
||
|| (c >= 0x0b32 && c <= 0x0b33)
|
||
|| (c >= 0x0b36 && c <= 0x0b39)
|
||
|| (c >= 0x0b5c && c <= 0x0b5d)
|
||
|| (c >= 0x0b5f && c <= 0x0b61))
|
||
return 1;
|
||
|
||
/* Tamil */
|
||
if ((c >= 0x0b85 && c <= 0x0b8a)
|
||
|| (c >= 0x0b8e && c <= 0x0b90)
|
||
|| (c >= 0x0b92 && c <= 0x0b95)
|
||
|| (c >= 0x0b99 && c <= 0x0b9a)
|
||
|| (c == 0x0b9c)
|
||
|| (c >= 0x0b9e && c <= 0x0b9f)
|
||
|| (c >= 0x0ba3 && c <= 0x0ba4)
|
||
|| (c >= 0x0ba8 && c <= 0x0baa)
|
||
|| (c >= 0x0bae && c <= 0x0bb5)
|
||
|| (c >= 0x0bb7 && c <= 0x0bb9))
|
||
return 1;
|
||
|
||
/* Telugu */
|
||
if ((c >= 0x0c05 && c <= 0x0c0c)
|
||
|| (c >= 0x0c0e && c <= 0x0c10)
|
||
|| (c >= 0x0c12 && c <= 0x0c28)
|
||
|| (c >= 0x0c2a && c <= 0x0c33)
|
||
|| (c >= 0x0c35 && c <= 0x0c39)
|
||
|| (c >= 0x0c60 && c <= 0x0c61))
|
||
return 1;
|
||
|
||
/* Kannada */
|
||
if ((c >= 0x0c85 && c <= 0x0c8c)
|
||
|| (c >= 0x0c8e && c <= 0x0c90)
|
||
|| (c >= 0x0c92 && c <= 0x0ca8)
|
||
|| (c >= 0x0caa && c <= 0x0cb3)
|
||
|| (c >= 0x0cb5 && c <= 0x0cb9)
|
||
|| (c >= 0x0ce0 && c <= 0x0ce1))
|
||
return 1;
|
||
|
||
/* Malayalam */
|
||
if ((c >= 0x0d05 && c <= 0x0d0c)
|
||
|| (c >= 0x0d0e && c <= 0x0d10)
|
||
|| (c >= 0x0d12 && c <= 0x0d28)
|
||
|| (c >= 0x0d2a && c <= 0x0d39)
|
||
|| (c >= 0x0d60 && c <= 0x0d61))
|
||
return 1;
|
||
|
||
/* Thai */
|
||
if ((c >= 0x0e01 && c <= 0x0e30)
|
||
|| (c >= 0x0e32 && c <= 0x0e33)
|
||
|| (c >= 0x0e40 && c <= 0x0e46)
|
||
|| (c >= 0x0e4f && c <= 0x0e5b))
|
||
return 1;
|
||
|
||
/* Lao */
|
||
if ((c >= 0x0e81 && c <= 0x0e82)
|
||
|| (c == 0x0e84)
|
||
|| (c == 0x0e87)
|
||
|| (c == 0x0e88)
|
||
|| (c == 0x0e8a)
|
||
|| (c == 0x0e0d)
|
||
|| (c >= 0x0e94 && c <= 0x0e97)
|
||
|| (c >= 0x0e99 && c <= 0x0e9f)
|
||
|| (c >= 0x0ea1 && c <= 0x0ea3)
|
||
|| (c == 0x0ea5)
|
||
|| (c == 0x0ea7)
|
||
|| (c == 0x0eaa)
|
||
|| (c == 0x0eab)
|
||
|| (c >= 0x0ead && c <= 0x0eb0)
|
||
|| (c == 0x0eb2)
|
||
|| (c == 0x0eb3)
|
||
|| (c == 0x0ebd)
|
||
|| (c >= 0x0ec0 && c <= 0x0ec4)
|
||
|| (c == 0x0ec6))
|
||
return 1;
|
||
|
||
/* Georgian */
|
||
if ((c >= 0x10a0 && c <= 0x10c5)
|
||
|| (c >= 0x10d0 && c <= 0x10f6))
|
||
return 1;
|
||
|
||
/* Hiragana */
|
||
if ((c >= 0x3041 && c <= 0x3094)
|
||
|| (c >= 0x309b && c <= 0x309e))
|
||
return 1;
|
||
|
||
/* Katakana */
|
||
if ((c >= 0x30a1 && c <= 0x30fe))
|
||
return 1;
|
||
|
||
/* Bopmofo */
|
||
if ((c >= 0x3105 && c <= 0x312c))
|
||
return 1;
|
||
|
||
/* Hangul */
|
||
if ((c >= 0x1100 && c <= 0x1159)
|
||
|| (c >= 0x1161 && c <= 0x11a2)
|
||
|| (c >= 0x11a8 && c <= 0x11f9))
|
||
return 1;
|
||
|
||
/* CJK Unified Ideographs */
|
||
if ((c >= 0xf900 && c <= 0xfa2d)
|
||
|| (c >= 0xfb1f && c <= 0xfb36)
|
||
|| (c >= 0xfb38 && c <= 0xfb3c)
|
||
|| (c == 0xfb3e)
|
||
|| (c >= 0xfb40 && c <= 0xfb41)
|
||
|| (c >= 0xfb42 && c <= 0xfb44)
|
||
|| (c >= 0xfb46 && c <= 0xfbb1)
|
||
|| (c >= 0xfbd3 && c <= 0xfd3f)
|
||
|| (c >= 0xfd50 && c <= 0xfd8f)
|
||
|| (c >= 0xfd92 && c <= 0xfdc7)
|
||
|| (c >= 0xfdf0 && c <= 0xfdfb)
|
||
|| (c >= 0xfe70 && c <= 0xfe72)
|
||
|| (c == 0xfe74)
|
||
|| (c >= 0xfe76 && c <= 0xfefc)
|
||
|| (c >= 0xff21 && c <= 0xff3a)
|
||
|| (c >= 0xff41 && c <= 0xff5a)
|
||
|| (c >= 0xff66 && c <= 0xffbe)
|
||
|| (c >= 0xffc2 && c <= 0xffc7)
|
||
|| (c >= 0xffca && c <= 0xffcf)
|
||
|| (c >= 0xffd2 && c <= 0xffd7)
|
||
|| (c >= 0xffda && c <= 0xffdc)
|
||
|| (c >= 0x4e00 && c <= 0x9fa5))
|
||
return 1;
|
||
|
||
error ("universal-character-name '\\u%04x' not valid in identifier", c);
|
||
return 1;
|
||
#endif
|
||
}
|
||
|
||
/* Add the UTF-8 representation of C to the token_buffer. */
|
||
|
||
static void
|
||
utf8_extend_token (c)
|
||
int c;
|
||
{
|
||
int shift, mask;
|
||
|
||
if (c <= 0x0000007f)
|
||
{
|
||
extend_token (c);
|
||
return;
|
||
}
|
||
else if (c <= 0x000007ff)
|
||
shift = 6, mask = 0xc0;
|
||
else if (c <= 0x0000ffff)
|
||
shift = 12, mask = 0xe0;
|
||
else if (c <= 0x001fffff)
|
||
shift = 18, mask = 0xf0;
|
||
else if (c <= 0x03ffffff)
|
||
shift = 24, mask = 0xf8;
|
||
else
|
||
shift = 30, mask = 0xfc;
|
||
|
||
extend_token (mask | (c >> shift));
|
||
do
|
||
{
|
||
shift -= 6;
|
||
extend_token ((unsigned char) (0x80 | (c >> shift)));
|
||
}
|
||
while (shift);
|
||
}
|
||
#endif
|
||
|
||
#if 0
|
||
struct try_type
|
||
{
|
||
tree *const node_var;
|
||
const char unsigned_flag;
|
||
const char long_flag;
|
||
const char long_long_flag;
|
||
};
|
||
|
||
struct try_type type_sequence[] =
|
||
{
|
||
{ &integer_type_node, 0, 0, 0},
|
||
{ &unsigned_type_node, 1, 0, 0},
|
||
{ &long_integer_type_node, 0, 1, 0},
|
||
{ &long_unsigned_type_node, 1, 1, 0},
|
||
{ &long_long_integer_type_node, 0, 1, 1},
|
||
{ &long_long_unsigned_type_node, 1, 1, 1}
|
||
};
|
||
#endif /* 0 */
|
||
|
||
struct pf_args
|
||
{
|
||
/* Input */
|
||
const char *str;
|
||
int fflag;
|
||
int lflag;
|
||
int base;
|
||
/* Output */
|
||
int conversion_errno;
|
||
REAL_VALUE_TYPE value;
|
||
tree type;
|
||
};
|
||
|
||
static void
|
||
parse_float (data)
|
||
PTR data;
|
||
{
|
||
struct pf_args * args = (struct pf_args *) data;
|
||
const char *typename;
|
||
|
||
args->conversion_errno = 0;
|
||
args->type = double_type_node;
|
||
typename = "double";
|
||
|
||
/* The second argument, machine_mode, of REAL_VALUE_ATOF
|
||
tells the desired precision of the binary result
|
||
of decimal-to-binary conversion. */
|
||
|
||
if (args->fflag)
|
||
{
|
||
if (args->lflag)
|
||
error ("both 'f' and 'l' suffixes on floating constant");
|
||
|
||
args->type = float_type_node;
|
||
typename = "float";
|
||
}
|
||
else if (args->lflag)
|
||
{
|
||
args->type = long_double_type_node;
|
||
typename = "long double";
|
||
}
|
||
else if (flag_single_precision_constant)
|
||
{
|
||
args->type = float_type_node;
|
||
typename = "float";
|
||
}
|
||
|
||
errno = 0;
|
||
if (args->base == 16)
|
||
args->value = REAL_VALUE_HTOF (args->str, TYPE_MODE (args->type));
|
||
else
|
||
args->value = REAL_VALUE_ATOF (args->str, TYPE_MODE (args->type));
|
||
|
||
args->conversion_errno = errno;
|
||
/* A diagnostic is required here by some ISO C testsuites.
|
||
This is not pedwarn, because some people don't want
|
||
an error for this. */
|
||
if (REAL_VALUE_ISINF (args->value) && pedantic)
|
||
warning ("floating point number exceeds range of '%s'", typename);
|
||
}
|
||
|
||
int
|
||
c_lex (value)
|
||
tree *value;
|
||
{
|
||
const cpp_token *tok;
|
||
|
||
retry:
|
||
timevar_push (TV_CPP);
|
||
do
|
||
tok = cpp_get_token (parse_in);
|
||
while (tok->type == CPP_PADDING);
|
||
timevar_pop (TV_CPP);
|
||
|
||
/* The C++ front end does horrible things with the current line
|
||
number. To ensure an accurate line number, we must reset it
|
||
every time we return a token. */
|
||
lineno = src_lineno;
|
||
|
||
*value = NULL_TREE;
|
||
switch (tok->type)
|
||
{
|
||
case CPP_OPEN_BRACE: indent_level++; break;
|
||
case CPP_CLOSE_BRACE: indent_level--; break;
|
||
|
||
/* Issue this error here, where we can get at tok->val.c. */
|
||
case CPP_OTHER:
|
||
if (ISGRAPH (tok->val.c))
|
||
error ("stray '%c' in program", tok->val.c);
|
||
else
|
||
error ("stray '\\%o' in program", tok->val.c);
|
||
goto retry;
|
||
|
||
case CPP_NAME:
|
||
*value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node));
|
||
break;
|
||
|
||
case CPP_NUMBER:
|
||
*value = lex_number ((const char *)tok->val.str.text, tok->val.str.len);
|
||
break;
|
||
|
||
case CPP_CHAR:
|
||
case CPP_WCHAR:
|
||
*value = lex_charconst (tok);
|
||
break;
|
||
|
||
case CPP_STRING:
|
||
case CPP_WSTRING:
|
||
*value = lex_string ((const char *)tok->val.str.text,
|
||
tok->val.str.len, tok->type == CPP_WSTRING);
|
||
break;
|
||
|
||
/* These tokens should not be visible outside cpplib. */
|
||
case CPP_HEADER_NAME:
|
||
case CPP_COMMENT:
|
||
case CPP_MACRO_ARG:
|
||
abort ();
|
||
|
||
default: break;
|
||
}
|
||
|
||
return tok->type;
|
||
}
|
||
|
||
#define ERROR(msgid) do { error(msgid); goto syntax_error; } while(0)
|
||
|
||
static tree
|
||
lex_number (str, len)
|
||
const char *str;
|
||
unsigned int len;
|
||
{
|
||
int base = 10;
|
||
int count = 0;
|
||
int largest_digit = 0;
|
||
int numdigits = 0;
|
||
int overflow = 0;
|
||
int c;
|
||
tree value;
|
||
const char *p;
|
||
enum anon1 { NOT_FLOAT = 0, AFTER_POINT, AFTER_EXPON } floatflag = NOT_FLOAT;
|
||
|
||
/* We actually store only HOST_BITS_PER_CHAR bits in each part.
|
||
The code below which fills the parts array assumes that a host
|
||
int is at least twice as wide as a host char, and that
|
||
HOST_BITS_PER_WIDE_INT is an even multiple of HOST_BITS_PER_CHAR.
|
||
Two HOST_WIDE_INTs is the largest int literal we can store.
|
||
In order to detect overflow below, the number of parts (TOTAL_PARTS)
|
||
must be exactly the number of parts needed to hold the bits
|
||
of two HOST_WIDE_INTs. */
|
||
#define TOTAL_PARTS ((HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR) * 2)
|
||
unsigned int parts[TOTAL_PARTS];
|
||
|
||
/* Optimize for most frequent case. */
|
||
if (len == 1)
|
||
{
|
||
if (*str == '0')
|
||
return integer_zero_node;
|
||
else if (*str == '1')
|
||
return integer_one_node;
|
||
else
|
||
return build_int_2 (*str - '0', 0);
|
||
}
|
||
|
||
for (count = 0; count < TOTAL_PARTS; count++)
|
||
parts[count] = 0;
|
||
|
||
/* len is known to be >1 at this point. */
|
||
p = str;
|
||
|
||
if (len > 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
|
||
{
|
||
base = 16;
|
||
p = str + 2;
|
||
}
|
||
/* The ISDIGIT check is so we are not confused by a suffix on 0. */
|
||
else if (str[0] == '0' && ISDIGIT (str[1]))
|
||
{
|
||
base = 8;
|
||
p = str + 1;
|
||
}
|
||
|
||
do
|
||
{
|
||
c = *p++;
|
||
|
||
if (c == '.')
|
||
{
|
||
if (floatflag == AFTER_POINT)
|
||
ERROR ("too many decimal points in floating constant");
|
||
else if (floatflag == AFTER_EXPON)
|
||
ERROR ("decimal point in exponent - impossible!");
|
||
else
|
||
floatflag = AFTER_POINT;
|
||
|
||
if (base == 8)
|
||
base = 10;
|
||
}
|
||
else if (c == '_')
|
||
/* Possible future extension: silently ignore _ in numbers,
|
||
permitting cosmetic grouping - e.g. 0x8000_0000 == 0x80000000
|
||
but somewhat easier to read. Ada has this? */
|
||
ERROR ("underscore in number");
|
||
else
|
||
{
|
||
int n;
|
||
/* It is not a decimal point.
|
||
It should be a digit (perhaps a hex digit). */
|
||
|
||
if (ISDIGIT (c)
|
||
|| (base == 16 && ISXDIGIT (c)))
|
||
{
|
||
n = hex_value (c);
|
||
}
|
||
else if (base <= 10 && (c == 'e' || c == 'E'))
|
||
{
|
||
base = 10;
|
||
floatflag = AFTER_EXPON;
|
||
break;
|
||
}
|
||
else if (base == 16 && (c == 'p' || c == 'P'))
|
||
{
|
||
floatflag = AFTER_EXPON;
|
||
break; /* start of exponent */
|
||
}
|
||
else
|
||
{
|
||
p--;
|
||
break; /* start of suffix */
|
||
}
|
||
|
||
if (n >= largest_digit)
|
||
largest_digit = n;
|
||
numdigits++;
|
||
|
||
for (count = 0; count < TOTAL_PARTS; count++)
|
||
{
|
||
parts[count] *= base;
|
||
if (count)
|
||
{
|
||
parts[count]
|
||
+= (parts[count-1] >> HOST_BITS_PER_CHAR);
|
||
parts[count-1]
|
||
&= (1 << HOST_BITS_PER_CHAR) - 1;
|
||
}
|
||
else
|
||
parts[0] += n;
|
||
}
|
||
|
||
/* If the highest-order part overflows (gets larger than
|
||
a host char will hold) then the whole number has
|
||
overflowed. Record this and truncate the highest-order
|
||
part. */
|
||
if (parts[TOTAL_PARTS - 1] >> HOST_BITS_PER_CHAR)
|
||
{
|
||
overflow = 1;
|
||
parts[TOTAL_PARTS - 1] &= (1 << HOST_BITS_PER_CHAR) - 1;
|
||
}
|
||
}
|
||
}
|
||
while (p < str + len);
|
||
|
||
/* This can happen on input like `int i = 0x;' */
|
||
if (numdigits == 0)
|
||
ERROR ("numeric constant with no digits");
|
||
|
||
if (largest_digit >= base)
|
||
ERROR ("numeric constant contains digits beyond the radix");
|
||
|
||
if (floatflag != NOT_FLOAT)
|
||
{
|
||
tree type;
|
||
int imag, fflag, lflag, conversion_errno;
|
||
REAL_VALUE_TYPE real;
|
||
struct pf_args args;
|
||
char *copy;
|
||
|
||
if (base == 16 && pedantic && !flag_isoc99)
|
||
pedwarn ("floating constant may not be in radix 16");
|
||
|
||
if (base == 16 && floatflag != AFTER_EXPON)
|
||
ERROR ("hexadecimal floating constant has no exponent");
|
||
|
||
/* Read explicit exponent if any, and put it in tokenbuf. */
|
||
if ((base == 10 && ((c == 'e') || (c == 'E')))
|
||
|| (base == 16 && (c == 'p' || c == 'P')))
|
||
{
|
||
if (p < str + len)
|
||
c = *p++;
|
||
if (p < str + len && (c == '+' || c == '-'))
|
||
c = *p++;
|
||
/* Exponent is decimal, even if string is a hex float. */
|
||
if (! ISDIGIT (c))
|
||
ERROR ("floating constant exponent has no digits");
|
||
while (p < str + len && ISDIGIT (c))
|
||
c = *p++;
|
||
if (! ISDIGIT (c))
|
||
p--;
|
||
}
|
||
|
||
/* Copy the float constant now; we don't want any suffixes in the
|
||
string passed to parse_float. */
|
||
copy = alloca (p - str + 1);
|
||
memcpy (copy, str, p - str);
|
||
copy[p - str] = '\0';
|
||
|
||
/* Now parse suffixes. */
|
||
fflag = lflag = imag = 0;
|
||
while (p < str + len)
|
||
switch (*p++)
|
||
{
|
||
case 'f': case 'F':
|
||
if (fflag)
|
||
ERROR ("more than one 'f' suffix on floating constant");
|
||
else if (warn_traditional && !in_system_header
|
||
&& ! cpp_sys_macro_p (parse_in))
|
||
warning ("traditional C rejects the 'f' suffix");
|
||
|
||
fflag = 1;
|
||
break;
|
||
|
||
case 'l': case 'L':
|
||
if (lflag)
|
||
ERROR ("more than one 'l' suffix on floating constant");
|
||
else if (warn_traditional && !in_system_header
|
||
&& ! cpp_sys_macro_p (parse_in))
|
||
warning ("traditional C rejects the 'l' suffix");
|
||
|
||
lflag = 1;
|
||
break;
|
||
|
||
case 'i': case 'I':
|
||
case 'j': case 'J':
|
||
if (imag)
|
||
ERROR ("more than one 'i' or 'j' suffix on floating constant");
|
||
else if (pedantic)
|
||
pedwarn ("ISO C forbids imaginary numeric constants");
|
||
imag = 1;
|
||
break;
|
||
|
||
default:
|
||
ERROR ("invalid suffix on floating constant");
|
||
}
|
||
|
||
/* Setup input for parse_float() */
|
||
args.str = copy;
|
||
args.fflag = fflag;
|
||
args.lflag = lflag;
|
||
args.base = base;
|
||
|
||
/* Convert string to a double, checking for overflow. */
|
||
if (do_float_handler (parse_float, (PTR) &args))
|
||
{
|
||
/* Receive output from parse_float() */
|
||
real = args.value;
|
||
}
|
||
else
|
||
/* We got an exception from parse_float() */
|
||
ERROR ("floating constant out of range");
|
||
|
||
/* Receive output from parse_float() */
|
||
conversion_errno = args.conversion_errno;
|
||
type = args.type;
|
||
|
||
#ifdef ERANGE
|
||
/* ERANGE is also reported for underflow,
|
||
so test the value to distinguish overflow from that. */
|
||
if (conversion_errno == ERANGE && !flag_traditional && pedantic
|
||
&& (REAL_VALUES_LESS (dconst1, real)
|
||
|| REAL_VALUES_LESS (real, dconstm1)))
|
||
warning ("floating point number exceeds range of 'double'");
|
||
#endif
|
||
|
||
/* Create a node with determined type and value. */
|
||
if (imag)
|
||
value = build_complex (NULL_TREE, convert (type, integer_zero_node),
|
||
build_real (type, real));
|
||
else
|
||
value = build_real (type, real);
|
||
}
|
||
else
|
||
{
|
||
tree trad_type, ansi_type, type;
|
||
HOST_WIDE_INT high, low;
|
||
int spec_unsigned = 0;
|
||
int spec_long = 0;
|
||
int spec_long_long = 0;
|
||
int spec_imag = 0;
|
||
int suffix_lu = 0;
|
||
int warn = 0, i;
|
||
|
||
trad_type = ansi_type = type = NULL_TREE;
|
||
while (p < str + len)
|
||
{
|
||
c = *p++;
|
||
switch (c)
|
||
{
|
||
case 'u': case 'U':
|
||
if (spec_unsigned)
|
||
error ("two 'u' suffixes on integer constant");
|
||
else if (warn_traditional && !in_system_header
|
||
&& ! cpp_sys_macro_p (parse_in))
|
||
warning ("traditional C rejects the 'u' suffix");
|
||
|
||
spec_unsigned = 1;
|
||
if (spec_long)
|
||
suffix_lu = 1;
|
||
break;
|
||
|
||
case 'l': case 'L':
|
||
if (spec_long)
|
||
{
|
||
if (spec_long_long)
|
||
error ("three 'l' suffixes on integer constant");
|
||
else if (suffix_lu)
|
||
error ("'lul' is not a valid integer suffix");
|
||
else if (c != spec_long)
|
||
error ("'Ll' and 'lL' are not valid integer suffixes");
|
||
else if (pedantic && ! flag_isoc99
|
||
&& ! in_system_header && warn_long_long)
|
||
pedwarn ("ISO C89 forbids long long integer constants");
|
||
spec_long_long = 1;
|
||
}
|
||
spec_long = c;
|
||
break;
|
||
|
||
case 'i': case 'I': case 'j': case 'J':
|
||
if (spec_imag)
|
||
error ("more than one 'i' or 'j' suffix on integer constant");
|
||
else if (pedantic)
|
||
pedwarn ("ISO C forbids imaginary numeric constants");
|
||
spec_imag = 1;
|
||
break;
|
||
|
||
default:
|
||
ERROR ("invalid suffix on integer constant");
|
||
}
|
||
}
|
||
|
||
/* If the literal overflowed, pedwarn about it now. */
|
||
if (overflow)
|
||
{
|
||
warn = 1;
|
||
pedwarn ("integer constant is too large for this configuration of the compiler - truncated to %d bits", HOST_BITS_PER_WIDE_INT * 2);
|
||
}
|
||
|
||
/* This is simplified by the fact that our constant
|
||
is always positive. */
|
||
|
||
high = low = 0;
|
||
|
||
for (i = 0; i < HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR; i++)
|
||
{
|
||
high |= ((HOST_WIDE_INT) parts[i + (HOST_BITS_PER_WIDE_INT
|
||
/ HOST_BITS_PER_CHAR)]
|
||
<< (i * HOST_BITS_PER_CHAR));
|
||
low |= (HOST_WIDE_INT) parts[i] << (i * HOST_BITS_PER_CHAR);
|
||
}
|
||
|
||
value = build_int_2 (low, high);
|
||
TREE_TYPE (value) = long_long_unsigned_type_node;
|
||
|
||
/* If warn_traditional, calculate both the ISO type and the
|
||
traditional type, then see if they disagree.
|
||
Otherwise, calculate only the type for the dialect in use. */
|
||
if (warn_traditional || flag_traditional)
|
||
{
|
||
/* Calculate the traditional type. */
|
||
/* Traditionally, any constant is signed; but if unsigned is
|
||
specified explicitly, obey that. Use the smallest size
|
||
with the right number of bits, except for one special
|
||
case with decimal constants. */
|
||
if (! spec_long && base != 10
|
||
&& int_fits_type_p (value, unsigned_type_node))
|
||
trad_type = spec_unsigned ? unsigned_type_node : integer_type_node;
|
||
/* A decimal constant must be long if it does not fit in
|
||
type int. I think this is independent of whether the
|
||
constant is signed. */
|
||
else if (! spec_long && base == 10
|
||
&& int_fits_type_p (value, integer_type_node))
|
||
trad_type = spec_unsigned ? unsigned_type_node : integer_type_node;
|
||
else if (! spec_long_long)
|
||
trad_type = (spec_unsigned
|
||
? long_unsigned_type_node
|
||
: long_integer_type_node);
|
||
else if (int_fits_type_p (value,
|
||
spec_unsigned
|
||
? long_long_unsigned_type_node
|
||
: long_long_integer_type_node))
|
||
trad_type = (spec_unsigned
|
||
? long_long_unsigned_type_node
|
||
: long_long_integer_type_node);
|
||
else
|
||
trad_type = (spec_unsigned
|
||
? widest_unsigned_literal_type_node
|
||
: widest_integer_literal_type_node);
|
||
}
|
||
if (warn_traditional || ! flag_traditional)
|
||
{
|
||
/* Calculate the ISO type. */
|
||
if (! spec_long && ! spec_unsigned
|
||
&& int_fits_type_p (value, integer_type_node))
|
||
ansi_type = integer_type_node;
|
||
else if (! spec_long && (base != 10 || spec_unsigned)
|
||
&& int_fits_type_p (value, unsigned_type_node))
|
||
ansi_type = unsigned_type_node;
|
||
else if (! spec_unsigned && !spec_long_long
|
||
&& int_fits_type_p (value, long_integer_type_node))
|
||
ansi_type = long_integer_type_node;
|
||
else if (! spec_long_long
|
||
&& int_fits_type_p (value, long_unsigned_type_node))
|
||
ansi_type = long_unsigned_type_node;
|
||
else if (! spec_unsigned
|
||
&& int_fits_type_p (value, long_long_integer_type_node))
|
||
ansi_type = long_long_integer_type_node;
|
||
else if (int_fits_type_p (value, long_long_unsigned_type_node))
|
||
ansi_type = long_long_unsigned_type_node;
|
||
else if (! spec_unsigned
|
||
&& int_fits_type_p (value, widest_integer_literal_type_node))
|
||
ansi_type = widest_integer_literal_type_node;
|
||
else
|
||
ansi_type = widest_unsigned_literal_type_node;
|
||
}
|
||
|
||
type = flag_traditional ? trad_type : ansi_type;
|
||
|
||
/* We assume that constants specified in a non-decimal
|
||
base are bit patterns, and that the programmer really
|
||
meant what they wrote. */
|
||
if (warn_traditional && !in_system_header
|
||
&& base == 10 && trad_type != ansi_type)
|
||
{
|
||
if (TYPE_PRECISION (trad_type) != TYPE_PRECISION (ansi_type))
|
||
warning ("width of integer constant changes with -traditional");
|
||
else if (TREE_UNSIGNED (trad_type) != TREE_UNSIGNED (ansi_type))
|
||
warning ("integer constant is unsigned in ISO C, signed with -traditional");
|
||
else
|
||
warning ("width of integer constant may change on other systems with -traditional");
|
||
}
|
||
|
||
if (pedantic && !flag_traditional && (flag_isoc99 || !spec_long_long)
|
||
&& !warn
|
||
&& ((flag_isoc99
|
||
? TYPE_PRECISION (long_long_integer_type_node)
|
||
: TYPE_PRECISION (long_integer_type_node)) < TYPE_PRECISION (type)))
|
||
{
|
||
warn = 1;
|
||
pedwarn ("integer constant larger than the maximum value of %s",
|
||
(flag_isoc99
|
||
? (TREE_UNSIGNED (type)
|
||
? _("an unsigned long long int")
|
||
: _("a long long int"))
|
||
: _("an unsigned long int")));
|
||
}
|
||
|
||
if (base == 10 && ! spec_unsigned && TREE_UNSIGNED (type))
|
||
warning ("decimal constant is so large that it is unsigned");
|
||
|
||
if (spec_imag)
|
||
{
|
||
if (TYPE_PRECISION (type)
|
||
<= TYPE_PRECISION (integer_type_node))
|
||
value = build_complex (NULL_TREE, integer_zero_node,
|
||
convert (integer_type_node, value));
|
||
else
|
||
ERROR ("complex integer constant is too wide for 'complex int'");
|
||
}
|
||
else if (flag_traditional && !int_fits_type_p (value, type))
|
||
/* The traditional constant 0x80000000 is signed
|
||
but doesn't fit in the range of int.
|
||
This will change it to -0x80000000, which does fit. */
|
||
{
|
||
TREE_TYPE (value) = unsigned_type (type);
|
||
value = convert (type, value);
|
||
TREE_OVERFLOW (value) = TREE_CONSTANT_OVERFLOW (value) = 0;
|
||
}
|
||
else
|
||
TREE_TYPE (value) = type;
|
||
|
||
/* If it's still an integer (not a complex), and it doesn't
|
||
fit in the type we choose for it, then pedwarn. */
|
||
|
||
if (! warn
|
||
&& TREE_CODE (TREE_TYPE (value)) == INTEGER_TYPE
|
||
&& ! int_fits_type_p (value, TREE_TYPE (value)))
|
||
pedwarn ("integer constant is larger than the maximum value for its type");
|
||
}
|
||
|
||
if (p < str + len)
|
||
error ("missing white space after number '%.*s'", (int) (p - str), str);
|
||
|
||
return value;
|
||
|
||
syntax_error:
|
||
return integer_zero_node;
|
||
}
|
||
|
||
static tree
|
||
lex_string (str, len, wide)
|
||
const char *str;
|
||
unsigned int len;
|
||
int wide;
|
||
{
|
||
tree value;
|
||
char *buf = alloca ((len + 1) * (wide ? WCHAR_BYTES : 1));
|
||
char *q = buf;
|
||
const char *p = str, *limit = str + len;
|
||
unsigned int c;
|
||
unsigned width = wide ? WCHAR_TYPE_SIZE
|
||
: TYPE_PRECISION (char_type_node);
|
||
|
||
#ifdef MULTIBYTE_CHARS
|
||
/* Reset multibyte conversion state. */
|
||
(void) local_mbtowc (NULL, NULL, 0);
|
||
#endif
|
||
|
||
while (p < limit)
|
||
{
|
||
#ifdef MULTIBYTE_CHARS
|
||
wchar_t wc;
|
||
int char_len;
|
||
|
||
char_len = local_mbtowc (&wc, p, limit - p);
|
||
if (char_len == -1)
|
||
{
|
||
warning ("ignoring invalid multibyte character");
|
||
char_len = 1;
|
||
c = *p++;
|
||
}
|
||
else
|
||
{
|
||
p += char_len;
|
||
c = wc;
|
||
}
|
||
#else
|
||
c = *p++;
|
||
#endif
|
||
|
||
if (c == '\\' && !ignore_escape_flag)
|
||
{
|
||
unsigned int mask;
|
||
|
||
if (width < HOST_BITS_PER_INT)
|
||
mask = ((unsigned int) 1 << width) - 1;
|
||
else
|
||
mask = ~0;
|
||
c = cpp_parse_escape (parse_in, (const unsigned char **) &p,
|
||
(const unsigned char *) limit,
|
||
mask, flag_traditional);
|
||
}
|
||
|
||
/* Add this single character into the buffer either as a wchar_t
|
||
or as a single byte. */
|
||
if (wide)
|
||
{
|
||
unsigned charwidth = TYPE_PRECISION (char_type_node);
|
||
unsigned bytemask = (1 << charwidth) - 1;
|
||
int byte;
|
||
|
||
for (byte = 0; byte < WCHAR_BYTES; ++byte)
|
||
{
|
||
int n;
|
||
if (byte >= (int) sizeof (c))
|
||
n = 0;
|
||
else
|
||
n = (c >> (byte * charwidth)) & bytemask;
|
||
if (BYTES_BIG_ENDIAN)
|
||
q[WCHAR_BYTES - byte - 1] = n;
|
||
else
|
||
q[byte] = n;
|
||
}
|
||
q += WCHAR_BYTES;
|
||
}
|
||
else
|
||
{
|
||
*q++ = c;
|
||
}
|
||
}
|
||
|
||
/* Terminate the string value, either with a single byte zero
|
||
or with a wide zero. */
|
||
|
||
if (wide)
|
||
{
|
||
memset (q, 0, WCHAR_BYTES);
|
||
q += WCHAR_BYTES;
|
||
}
|
||
else
|
||
{
|
||
*q++ = '\0';
|
||
}
|
||
|
||
value = build_string (q - buf, buf);
|
||
|
||
if (wide)
|
||
TREE_TYPE (value) = wchar_array_type_node;
|
||
else
|
||
TREE_TYPE (value) = char_array_type_node;
|
||
return value;
|
||
}
|
||
|
||
/* Converts a (possibly wide) character constant token into a tree. */
|
||
static tree
|
||
lex_charconst (token)
|
||
const cpp_token *token;
|
||
{
|
||
HOST_WIDE_INT result;
|
||
tree value;
|
||
unsigned int chars_seen;
|
||
|
||
result = cpp_interpret_charconst (parse_in, token, warn_multichar,
|
||
flag_traditional, &chars_seen);
|
||
if (token->type == CPP_WCHAR)
|
||
{
|
||
value = build_int_2 (result, 0);
|
||
TREE_TYPE (value) = wchar_type_node;
|
||
}
|
||
else
|
||
{
|
||
if (result < 0)
|
||
value = build_int_2 (result, -1);
|
||
else
|
||
value = build_int_2 (result, 0);
|
||
|
||
/* In C, a character constant has type 'int'.
|
||
In C++ 'char', but multi-char charconsts have type 'int'. */
|
||
if (c_language == clk_cplusplus && chars_seen <= 1)
|
||
TREE_TYPE (value) = char_type_node;
|
||
else
|
||
TREE_TYPE (value) = integer_type_node;
|
||
}
|
||
|
||
return value;
|
||
}
|