Copyright (C) 1987, 1988, 1989, 1992, 1994, 1995, 1996, 1997
1998, 1999, 2000 Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
-it under 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.
+GCC is free software; you can redistribute it and/or modify it under
+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.
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
#include "config.h"
#include "system.h"
#include "intl.h"
#include "tm_p.h"
#include "splay-tree.h"
+#include "debug.h"
/* MULTIBYTE_CHARS support only works for native compilers.
??? Ideally what we want is to model widechar support after
#define GET_ENVIRONMENT(ENV_VALUE,ENV_NAME) ((ENV_VALUE) = getenv (ENV_NAME))
#endif
-/* The original file name, before changing "-" to "stdin". */
-static const char *orig_filename;
+/* The input filename as understood by CPP, where "" represents stdin. */
+static const char *cpp_filename;
-/* Private idea of the line number. See discussion in c_lex(). */
-static int lex_lineno;
+/* The current line map. */
+static const struct line_map *map;
+
+/* The line used to refresh the lineno global variable after each token. */
+static unsigned int src_lineno;
/* We may keep statistics about how long which files took to compile. */
static int header_time, body_time;
/* Number of bytes in a wide character. */
#define WCHAR_BYTES (WCHAR_TYPE_SIZE / BITS_PER_UNIT)
-int indent_level; /* Number of { minus number of }. */
+int indent_level; /* Number of { minus number of }. */
int pending_lang_change; /* If we need to switch languages - C++ only */
int c_header_level; /* depth in C headers - C++ only */
/* Nonzero tells yylex to ignore \ in string constants. */
static int ignore_escape_flag;
-static const char *readescape PARAMS ((const char *, const char *,
- unsigned int *));
-static const char *read_ucs PARAMS ((const char *, const char *,
- unsigned int *, int));
static void parse_float PARAMS ((PTR));
static tree lex_number PARAMS ((const char *, unsigned int));
static tree lex_string PARAMS ((const char *, unsigned int, int));
-static tree lex_charconst PARAMS ((const char *, unsigned int, int));
+static tree lex_charconst PARAMS ((const cpp_token *));
static void update_header_times PARAMS ((const char *));
static int dump_one_header PARAMS ((splay_tree_node, void *));
-static void cb_ident PARAMS ((cpp_reader *, const cpp_string *));
-static void cb_change_file PARAMS ((cpp_reader *, const cpp_file_change *));
-static void cb_def_pragma PARAMS ((cpp_reader *));
+static void cb_line_change PARAMS ((cpp_reader *, const cpp_token *, int));
+static void cb_ident PARAMS ((cpp_reader *, unsigned int,
+ const cpp_string *));
+static void cb_file_change PARAMS ((cpp_reader *, const struct line_map *));
+static void cb_def_pragma PARAMS ((cpp_reader *, unsigned int));
+static void cb_define PARAMS ((cpp_reader *, unsigned int,
+ cpp_hashnode *));
+static void cb_undef PARAMS ((cpp_reader *, unsigned int,
+ cpp_hashnode *));
\f
const char *
init_c_lex (filename)
const char *filename;
{
+ struct cpp_callbacks *cb;
struct c_fileinfo *toplevel;
- orig_filename = filename;
-
/* Set up filename timing. Must happen before cpp_start_read. */
file_info_tree = splay_tree_new ((splay_tree_compare_fn)strcmp,
0,
GET_ENVIRONMENT (literal_codeset, "LANG");
#endif
- parse_in.cb.ident = cb_ident;
- parse_in.cb.change_file = cb_change_file;
- parse_in.cb.def_pragma = cb_def_pragma;
+ cb = cpp_get_callbacks (parse_in);
+
+ cb->line_change = cb_line_change;
+ cb->ident = cb_ident;
+ cb->file_change = cb_file_change;
+ cb->def_pragma = cb_def_pragma;
+
+ /* Set the debug callbacks if we can use them. */
+ if (debug_info_level == DINFO_LEVEL_VERBOSE
+ && (write_symbols == DWARF_DEBUG || write_symbols == DWARF2_DEBUG))
+ {
+ cb->define = cb_define;
+ cb->undef = cb_undef;
+ }
- /* Make sure parse_in.digraphs matches flag_digraphs. */
- CPP_OPTION (&parse_in, digraphs) = flag_digraphs;
if (filename == 0 || !strcmp (filename, "-"))
- filename = "stdin";
+ filename = "stdin", cpp_filename = "";
+ else
+ cpp_filename = filename;
- /* Start it at 0, because check_newline is called at the very beginning
- and will increment it to 1. */
- lineno = lex_lineno = 0;
+ /* Start it at 0. */
+ lineno = 0;
return filename;
}
int
yyparse()
{
- if (! cpp_start_read (&parse_in, orig_filename))
+ if (! cpp_start_read (parse_in, cpp_filename))
return 1; /* cpplib has emitted an error. */
return yyparse_1();
No need to deal with linemarkers under normal conditions. */
static void
-cb_ident (pfile, str)
+cb_ident (pfile, line, str)
cpp_reader *pfile ATTRIBUTE_UNUSED;
- const cpp_string *str;
+ unsigned int line ATTRIBUTE_UNUSED;
+ const cpp_string *str ATTRIBUTE_UNUSED;
{
#ifdef ASM_OUTPUT_IDENT
if (! flag_no_ident)
#endif
}
+/* Called at the start of every non-empty line. TOKEN is the first
+ lexed token on the line. Used for diagnostic line numbers. */
+static void
+cb_line_change (pfile, token, parsing_args)
+ cpp_reader *pfile ATTRIBUTE_UNUSED;
+ const cpp_token *token;
+ int parsing_args ATTRIBUTE_UNUSED;
+{
+ src_lineno = SOURCE_LINE (map, token->line);
+}
+
static void
-cb_change_file (pfile, fc)
+cb_file_change (pfile, new_map)
cpp_reader *pfile ATTRIBUTE_UNUSED;
- const cpp_file_change *fc;
+ const struct line_map *new_map;
{
- if (fc->from.filename == 0)
- main_input_filename = fc->to.filename;
- in_system_header = fc->sysp;
+ unsigned int to_line = SOURCE_LINE (new_map, new_map->to_line);
- /* Do the actions implied by the preceding numbers. */
- if (fc->reason == FC_ENTER)
+ if (new_map->reason == LC_ENTER)
{
- /* FIXME. Don't stack the main buffer on the input stack. */
- if (fc->from.filename)
+ /* Don't stack the main buffer on the input stack;
+ we already did in compile_file. */
+ if (map == NULL)
+ main_input_filename = new_map->to_file;
+ else
{
- lineno = lex_lineno;
- push_srcloc (fc->to.filename, 1);
+ lineno = SOURCE_LINE (new_map - 1, new_map->from_line - 1);
+ push_srcloc (new_map->to_file, 1);
input_file_stack->indent_level = indent_level;
- debug_start_source_file (fc->to.filename);
+ (*debug_hooks->start_source_file) (lineno, new_map->to_file);
#ifndef NO_IMPLICIT_EXTERN_C
if (c_header_level)
++c_header_level;
- else if (fc->externc)
+ else if (new_map->sysp == 2)
{
c_header_level = 1;
++pending_lang_change;
#endif
}
}
- else if (fc->reason == FC_LEAVE)
+ else if (new_map->reason == LC_LEAVE)
{
- /* Popping out of a file. */
- if (input_file_stack->next)
- {
#ifndef NO_IMPLICIT_EXTERN_C
- if (c_header_level && --c_header_level == 0)
- {
- if (fc->externc)
- warning ("badly nested C headers from preprocessor");
- --pending_lang_change;
- }
+ if (c_header_level && --c_header_level == 0)
+ {
+ if (new_map->sysp == 2)
+ warning ("badly nested C headers from preprocessor");
+ --pending_lang_change;
+ }
#endif
#if 0
- if (indent_level != input_file_stack->indent_level)
- {
- warning_with_file_and_line
- (input_filename, lex_lineno,
- "This file contains more '%c's than '%c's.",
- indent_level > input_file_stack->indent_level ? '{' : '}',
- indent_level > input_file_stack->indent_level ? '}' : '{');
- }
-#endif
- pop_srcloc ();
- debug_end_source_file (input_file_stack->line);
+ if (indent_level != input_file_stack->indent_level)
+ {
+ warning_with_file_and_line
+ (input_filename, lineno,
+ "This file contains more '%c's than '%c's.",
+ indent_level > input_file_stack->indent_level ? '{' : '}',
+ indent_level > input_file_stack->indent_level ? '}' : '{');
}
- else
- error ("leaving more files than we entered");
+#endif
+ pop_srcloc ();
+
+ (*debug_hooks->end_source_file) (to_line);
}
- else if (fc->reason == FC_RENAME)
- input_filename = fc->to.filename;
- update_header_times (fc->to.filename);
-
- input_filename = fc->to.filename;
- lex_lineno = fc->to.lineno;
+ update_header_times (new_map->to_file);
+ in_system_header = new_map->sysp != 0;
+ input_filename = new_map->to_file;
+ lineno = to_line;
+ map = new_map;
/* Hook for C++. */
extract_interface_info ();
}
static void
-cb_def_pragma (pfile)
+cb_def_pragma (pfile, line)
cpp_reader *pfile;
+ unsigned int line;
{
/* Issue a warning message if we have been asked to do so. Ignore
unknown pragmas in system headers unless an explicit
- -Wunknown-pragmas has been given. */
+ -Wunknown-pragmas has been given. */
if (warn_unknown_pragmas > in_system_header)
{
const unsigned char *space, *name = 0;
- cpp_token s;
+ const cpp_token *s;
- cpp_get_token (pfile, &s);
- space = cpp_token_as_text (pfile, &s);
- cpp_get_token (pfile, &s);
- if (s.type == CPP_NAME)
- name = cpp_token_as_text (pfile, &s);
+ s = cpp_get_token (pfile);
+ space = cpp_token_as_text (pfile, s);
+ s = cpp_get_token (pfile);
+ if (s->type == CPP_NAME)
+ name = cpp_token_as_text (pfile, s);
+ lineno = SOURCE_LINE (map, line);
if (name)
warning ("ignoring #pragma %s %s", space, name);
else
}
}
-/* Parse a '\uNNNN' or '\UNNNNNNNN' sequence.
-
- [lex.charset]: The character designated by the universal-character-name
- \UNNNNNNNN is that character whose character short name in ISO/IEC 10646
- is NNNNNNNN; the character designated by the universal-character-name
- \uNNNN is that character whose character short name in ISO/IEC 10646 is
- 0000NNNN. If the hexadecimal value for a universal character name is
- less than 0x20 or in the range 0x7F-0x9F (inclusive), or if the
- universal character name designates a character in the basic source
- character set, then the program is ill-formed.
-
- We assume that wchar_t is Unicode, so we don't need to do any
- mapping. Is this ever wrong? */
-
-static const char *
-read_ucs (p, limit, cptr, length)
- const char *p;
- const char *limit;
- unsigned int *cptr;
- int length;
+/* #define callback for DWARF and DWARF2 debug info. */
+static void
+cb_define (pfile, line, node)
+ cpp_reader *pfile;
+ unsigned int line;
+ cpp_hashnode *node;
{
- unsigned int code = 0;
- int c;
-
- for (; length; --length)
- {
- if (p >= limit)
- {
- error ("incomplete universal-character-name");
- break;
- }
-
- c = *p++;
- if (! ISXDIGIT (c))
- {
- error ("non hex digit '%c' in universal-character-name", c);
- p--;
- break;
- }
-
- code <<= 4;
- if (c >= 'a' && c <= 'f')
- code += c - 'a' + 10;
- if (c >= 'A' && c <= 'F')
- code += c - 'A' + 10;
- if (c >= '0' && c <= '9')
- code += c - '0';
- }
-
-#ifdef TARGET_EBCDIC
- sorry ("universal-character-name on EBCDIC target");
- *cptr = 0x3f; /* EBCDIC invalid character */
- return p;
-#endif
-
- if (code > 0x9f && !(code & 0x80000000))
- /* True extended character, OK. */;
- else if (code >= 0x20 && code < 0x7f)
- {
- /* ASCII printable character. The C character set consists of all of
- these except $, @ and `. We use hex escapes so that this also
- works with EBCDIC hosts. */
- if (code != 0x24 && code != 0x40 && code != 0x60)
- error ("universal-character-name used for '%c'", code);
- }
- else
- error ("invalid universal-character-name");
-
- *cptr = code;
- return p;
+ (*debug_hooks->define) (SOURCE_LINE (map, line),
+ (const char *) cpp_macro_definition (pfile, node));
}
-/* Read an escape sequence and write its character equivalent into *CPTR.
- P is the input pointer, which is just after the backslash. LIMIT
- is how much text we have.
- Returns the updated input pointer. */
-
-static const char *
-readescape (p, limit, cptr)
- const char *p;
- const char *limit;
- unsigned int *cptr;
+/* #undef callback for DWARF and DWARF2 debug info. */
+static void
+cb_undef (pfile, line, node)
+ cpp_reader *pfile ATTRIBUTE_UNUSED;
+ unsigned int line;
+ cpp_hashnode *node;
{
- unsigned int c, code, count;
- unsigned firstdig = 0;
- int nonnull;
-
- if (p == limit)
- {
- /* cpp has already issued an error for this. */
- *cptr = 0;
- return p;
- }
-
- c = *p++;
-
- switch (c)
- {
- case 'x':
- if (warn_traditional && !in_system_header)
- warning ("the meaning of `\\x' varies with -traditional");
-
- if (flag_traditional)
- {
- *cptr = 'x';
- return p;
- }
-
- code = 0;
- count = 0;
- nonnull = 0;
- while (p < limit)
- {
- c = *p++;
- if (! ISXDIGIT (c))
- {
- p--;
- break;
- }
- code *= 16;
- if (c >= 'a' && c <= 'f')
- code += c - 'a' + 10;
- if (c >= 'A' && c <= 'F')
- code += c - 'A' + 10;
- if (c >= '0' && c <= '9')
- code += c - '0';
- if (code != 0 || count != 0)
- {
- if (count == 0)
- firstdig = code;
- count++;
- }
- nonnull = 1;
- }
- if (! nonnull)
- {
- warning ("\\x used with no following hex digits");
- *cptr = 'x';
- return p;
- }
- else if (count == 0)
- /* Digits are all 0's. Ok. */
- ;
- else if ((count - 1) * 4 >= TYPE_PRECISION (integer_type_node)
- || (count > 1
- && (((unsigned)1
- << (TYPE_PRECISION (integer_type_node)
- - (count - 1) * 4))
- <= firstdig)))
- pedwarn ("hex escape out of range");
- *cptr = code;
- return p;
-
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7':
- code = 0;
- for (count = 0; count < 3; count++)
- {
- if (c < '0' || c > '7')
- {
- p--;
- break;
- }
- code = (code * 8) + (c - '0');
- if (p == limit)
- break;
- c = *p++;
- }
-
- if (count == 3)
- p--;
-
- *cptr = code;
- return p;
-
- case '\\': case '\'': case '"': case '?':
- *cptr = c;
- return p;
-
- case 'n': *cptr = TARGET_NEWLINE; return p;
- case 't': *cptr = TARGET_TAB; return p;
- case 'r': *cptr = TARGET_CR; return p;
- case 'f': *cptr = TARGET_FF; return p;
- case 'b': *cptr = TARGET_BS; return p;
- case 'v': *cptr = TARGET_VT; return p;
- case 'a':
- if (warn_traditional && !in_system_header)
- warning ("the meaning of '\\a' varies with -traditional");
- *cptr = flag_traditional ? c : TARGET_BELL;
- return p;
-
- /* Warnings and support checks handled by read_ucs(). */
- case 'u': case 'U':
- if (c_language != clk_cplusplus && !flag_isoc99)
- break;
-
- if (warn_traditional && !in_system_header)
- warning ("the meaning of '\\%c' varies with -traditional", c);
-
- return read_ucs (p, limit, cptr, c == 'u' ? 4 : 8);
-
- case 'e': case 'E':
- if (pedantic)
- pedwarn ("non-ISO-standard escape sequence, '\\%c'", c);
- *cptr = TARGET_ESC; return p;
-
- /* '\(', etc, are used at beginning of line to avoid confusing Emacs.
- '\%' is used to prevent SCCS from getting confused. */
- case '(': case '{': case '[': case '%':
- if (pedantic)
- pedwarn ("unknown escape sequence '\\%c'", c);
- *cptr = c;
- return p;
- }
-
- if (ISGRAPH (c))
- pedwarn ("unknown escape sequence '\\%c'", c);
- else
- pedwarn ("unknown escape sequence: '\\' followed by char 0x%x", c);
-
- *cptr = c;
- return p;
+ (*debug_hooks->undef) (SOURCE_LINE (map, line),
+ (const char *) NODE_NAME (node));
}
#if 0 /* not yet */
c_lex (value)
tree *value;
{
- cpp_token tok;
- enum cpp_ttype type;
+ const cpp_token *tok;
retry:
timevar_push (TV_CPP);
- cpp_get_token (&parse_in, &tok);
+ 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. */
- lex_lineno = cpp_get_line (&parse_in)->line;
+ lineno = src_lineno;
*value = NULL_TREE;
- lineno = lex_lineno;
- type = tok.type;
- switch (type)
+ 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. */
+ /* 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);
+ if (ISGRAPH (tok->val.c))
+ error ("stray '%c' in program", tok->val.c);
else
- error ("stray '\\%#o' in program", tok.val.c);
+ error ("stray '\\%o' in program", tok->val.c);
goto retry;
case CPP_NAME:
- *value = get_identifier ((const char *)tok.val.node->name);
+ *value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node));
break;
- case CPP_INT:
- case CPP_FLOAT:
case CPP_NUMBER:
- *value = lex_number ((const char *)tok.val.str.text, tok.val.str.len);
+ *value = lex_number ((const char *)tok->val.str.text, tok->val.str.len);
break;
case CPP_CHAR:
case CPP_WCHAR:
- *value = lex_charconst ((const char *)tok.val.str.text,
- tok.val.str.len, tok.type == CPP_WCHAR);
+ *value = lex_charconst (tok);
break;
case CPP_STRING:
case CPP_WSTRING:
- case CPP_OSTRING:
- *value = lex_string ((const char *)tok.val.str.text,
- tok.val.str.len, tok.type == 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. */
default: break;
}
- return type;
+ return tok->type;
}
#define ERROR(msgid) do { error(msgid); goto syntax_error; } while(0)
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. */
+ of two HOST_WIDE_INTs. */
#define TOTAL_PARTS ((HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR) * 2)
unsigned int parts[TOTAL_PARTS];
if (c == '.')
{
- if (base == 16 && pedantic && !flag_isoc99)
- pedwarn ("floating constant may not be in radix 16");
- else if (floatflag == AFTER_POINT)
+ if (floatflag == AFTER_POINT)
ERROR ("too many decimal points in floating constant");
else if (floatflag == AFTER_EXPON)
ERROR ("decimal point in exponent - impossible!");
/* 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. */
+ part. */
if (parts[TOTAL_PARTS - 1] >> HOST_BITS_PER_CHAR)
{
overflow = 1;
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");
case 'f': case 'F':
if (fflag)
ERROR ("more than one 'f' suffix on floating constant");
- else if (warn_traditional && !in_system_header)
+ else if (warn_traditional && !in_system_header
+ && ! cpp_sys_macro_p (parse_in))
warning ("traditional C rejects the 'f' suffix");
fflag = 1;
case 'l': case 'L':
if (lflag)
ERROR ("more than one 'l' suffix on floating constant");
- else if (warn_traditional && !in_system_header)
+ else if (warn_traditional && !in_system_header
+ && ! cpp_sys_macro_p (parse_in))
warning ("traditional C rejects the 'l' suffix");
lflag = 1;
case 'u': case 'U':
if (spec_unsigned)
error ("two 'u' suffixes on integer constant");
- else if (warn_traditional && !in_system_header)
+ else if (warn_traditional && !in_system_header
+ && ! cpp_sys_macro_p (parse_in))
warning ("traditional C rejects the 'u' suffix");
spec_unsigned = 1;
}
}
- /* If the literal overflowed, pedwarn about it now. */
+ /* If the literal overflowed, pedwarn about it now. */
if (overflow)
{
warn = 1;
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. */
+ fit in the type we choose for it, then pedwarn. */
if (! warn
&& TREE_CODE (TREE_TYPE (value)) == INTEGER_TYPE
#ifdef MULTIBYTE_CHARS
/* Reset multibyte conversion state. */
- (void) local_mbtowc (NULL_PTR, NULL_PTR, 0);
+ (void) local_mbtowc (NULL, NULL, 0);
#endif
while (p < limit)
if (c == '\\' && !ignore_escape_flag)
{
- p = readescape (p, limit, &c);
- if (width < HOST_BITS_PER_INT
- && (unsigned) c >= ((unsigned)1 << width))
- pedwarn ("escape sequence out of range for character");
+ 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
return value;
}
+/* Converts a (possibly wide) character constant token into a tree. */
static tree
-lex_charconst (str, len, wide)
- const char *str;
- unsigned int len;
- int wide;
+lex_charconst (token)
+ const cpp_token *token;
{
- const char *limit = str + len;
- int result = 0;
- int num_chars = 0;
- int chars_seen = 0;
- unsigned width = TYPE_PRECISION (char_type_node);
- int max_chars;
- unsigned int c;
+ HOST_WIDE_INT result;
tree value;
-
-#ifdef MULTIBYTE_CHARS
- int longest_char = local_mb_cur_max ();
- (void) local_mbtowc (NULL_PTR, NULL_PTR, 0);
-#endif
-
- max_chars = TYPE_PRECISION (integer_type_node) / width;
- if (wide)
- width = WCHAR_TYPE_SIZE;
-
- while (str < limit)
- {
-#ifdef MULTIBYTE_CHARS
- wchar_t wc;
- int char_len;
-
- char_len = local_mbtowc (&wc, str, limit - str);
- if (char_len == -1)
- {
- warning ("Ignoring invalid multibyte character");
- char_len = 1;
- c = *str++;
- }
- else
- {
- p += char_len;
- c = wc;
- }
-#else
- c = *str++;
-#endif
-
- ++chars_seen;
- if (c == '\\')
- {
- str = readescape (str, limit, &c);
- if (width < HOST_BITS_PER_INT
- && (unsigned) c >= ((unsigned)1 << width))
- pedwarn ("escape sequence out of range for character");
- }
-#ifdef MAP_CHARACTER
- if (ISPRINT (c))
- c = MAP_CHARACTER (c);
-#endif
-
- /* Merge character into result; ignore excess chars. */
- num_chars += (width / TYPE_PRECISION (char_type_node));
- if (num_chars < max_chars + 1)
- {
- if (width < HOST_BITS_PER_INT)
- result = (result << width) | (c & ((1 << width) - 1));
- else
- result = c;
- }
- }
-
- if (chars_seen == 0)
- error ("empty character constant");
- else if (num_chars > max_chars)
+ unsigned int chars_seen;
+
+ result = cpp_interpret_charconst (parse_in, token, warn_multichar,
+ flag_traditional, &chars_seen);
+ if (token->type == CPP_WCHAR)
{
- num_chars = max_chars;
- error ("character constant too long");
+ value = build_int_2 (result, 0);
+ TREE_TYPE (value) = wchar_type_node;
}
- else if (chars_seen != 1 && ! flag_traditional && warn_multichar)
- warning ("multi-character character constant");
-
- /* If char type is signed, sign-extend the constant. */
- if (! wide)
+ else
{
- int num_bits = num_chars * width;
- if (num_bits == 0)
- /* We already got an error; avoid invalid shift. */
- value = build_int_2 (0, 0);
- else if (TREE_UNSIGNED (char_type_node)
- || ((result >> (num_bits - 1)) & 1) == 0)
- value = build_int_2 (result & (~(unsigned HOST_WIDE_INT) 0
- >> (HOST_BITS_PER_WIDE_INT - num_bits)),
- 0);
+ if (result < 0)
+ value = build_int_2 (result, -1);
else
- value = build_int_2 (result | ~(~(unsigned HOST_WIDE_INT) 0
- >> (HOST_BITS_PER_WIDE_INT - num_bits)),
- -1);
- /* In C, a character constant has type 'int'; in C++, 'char'. */
- if (chars_seen <= 1 && c_language == clk_cplusplus)
- TREE_TYPE (value) = char_type_node;
+ 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;
- }
- else
- {
- value = build_int_2 (result, 0);
- TREE_TYPE (value) = wchar_type_node;
+ TREE_TYPE (value) = integer_type_node;
}
-
+
return value;
}
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