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 "rtl.h"
-#include "expr.h"
#include "tree.h"
+#include "expr.h"
#include "input.h"
#include "output.h"
-#include "c-lex.h"
#include "c-tree.h"
+#include "c-common.h"
#include "flags.h"
#include "timevar.h"
#include "cpplib.h"
#include "intl.h"
#include "tm_p.h"
#include "splay-tree.h"
-
-/* MULTIBYTE_CHARS support only works for native compilers.
- ??? Ideally what we want is to model widechar support after
- the current floating point support. */
-#ifdef CROSS_COMPILE
-#undef MULTIBYTE_CHARS
-#endif
+#include "debug.h"
#ifdef MULTIBYTE_CHARS
#include "mbchar.h"
#define GET_ENVIRONMENT(ENV_VALUE,ENV_NAME) ((ENV_VALUE) = getenv (ENV_NAME))
#endif
-extern cpp_reader parse_in;
-
-/* The original file name, before changing "-" to "stdin". */
-static const char *orig_filename;
+/* The current line map. */
+static const struct line_map *map;
-/* Private idea of the line number. See discussion in c_lex(). */
-static int lex_lineno;
+/* 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;
static splay_tree file_info_tree;
-/* Cause the `yydebug' variable to be defined. */
-#define YYDEBUG 1
-
/* File used for outputting assembler code. */
extern FILE *asm_out_file;
/* 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 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_string PARAMS ((const unsigned 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_enter_file PARAMS ((cpp_reader *));
-static void cb_leave_file PARAMS ((cpp_reader *));
-static void cb_rename_file PARAMS ((cpp_reader *));
-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. */
+ /* Set up filename timing. Must happen before cpp_read_main_file. */
file_info_tree = splay_tree_new ((splay_tree_compare_fn)strcmp,
0,
(splay_tree_delete_value_fn)free);
GET_ENVIRONMENT (literal_codeset, "LANG");
#endif
- parse_in.cb.ident = cb_ident;
- parse_in.cb.enter_file = cb_enter_file;
- parse_in.cb.leave_file = cb_leave_file;
- parse_in.cb.rename_file = cb_rename_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;
- /* Make sure parse_in.digraphs matches flag_digraphs. */
- CPP_OPTION (&parse_in, digraphs) = flag_digraphs;
+ /* Set the debug callbacks if we can use them. */
+ if (debug_info_level == DINFO_LEVEL_VERBOSE
+ && (write_symbols == DWARF_DEBUG || write_symbols == DWARF2_DEBUG
+ || write_symbols == VMS_AND_DWARF2_DEBUG))
+ {
+ cb->define = cb_define;
+ cb->undef = cb_undef;
+ }
- if (filename == 0 || !strcmp (filename, "-"))
- filename = "stdin";
+ /* Start it at 0. */
+ lineno = 0;
- /* Start it at 0, because check_newline is called at the very beginning
- and will increment it to 1. */
- lineno = lex_lineno = 0;
+ if (filename == NULL || !strcmp (filename, "-"))
+ filename = "";
- return filename;
+ return cpp_read_main_file (parse_in, filename, ident_hash);
}
/* A thin wrapper around the real parser that initializes the
- integrated preprocessor after debug output has been initialized. */
+ integrated preprocessor after debug output has been initialized.
+ Also, make sure the start_source_file debug hook gets called for
+ the primary source file. */
-int
-yyparse()
+void
+c_common_parse_file (set_yydebug)
+ int set_yydebug ATTRIBUTE_UNUSED;
{
- if (! cpp_start_read (&parse_in, orig_filename))
- return 1; /* cpplib has emitted an error. */
+#if YYDEBUG != 0
+ yydebug = set_yydebug;
+#else
+ warning ("YYDEBUG not defined");
+#endif
+
+ (*debug_hooks->start_source_file) (lineno, input_filename);
+ cpp_finish_options (parse_in);
- return yyparse_1();
+ yyparse ();
+ free_parser_stacks ();
}
struct c_fileinfo *
splay_tree_foreach (file_info_tree, dump_one_header, 0);
}
-#if 0 /* Keep this code for a while for reference. */
static void
-process_directive ()
+cb_ident (pfile, line, str)
+ cpp_reader *pfile ATTRIBUTE_UNUSED;
+ unsigned int line ATTRIBUTE_UNUSED;
+ const cpp_string *str ATTRIBUTE_UNUSED;
{
- enum cpp_ttype token;
- tree value;
- int saw_line;
- enum { act_none, act_push, act_pop } action;
- int action_number, l;
- const char *new_file;
-#ifndef NO_IMPLICIT_EXTERN_C
- int entering_c_header = 0;
-#endif
-
- /* Don't read beyond this line. */
- saw_line = 0;
- linemode = 1;
-
- token = c_lex (&value);
-
- if (token == CPP_NAME)
- {
- /* If a letter follows, then if the word here is `line', skip
- it and ignore it; otherwise, ignore the line, with an error
- if the word isn't `pragma'. */
-
- const char *name = IDENTIFIER_POINTER (value);
-
- if (!strcmp (name, "pragma"))
- {
- dispatch_pragma ();
- goto skipline;
- }
- else if (!strcmp (name, "define"))
- {
- debug_define (lex_lineno, GET_DIRECTIVE_LINE ());
- goto skipline;
- }
- else if (!strcmp (name, "undef"))
- {
- debug_undef (lex_lineno, GET_DIRECTIVE_LINE ());
- goto skipline;
- }
- else if (!strcmp (name, "line"))
- {
- saw_line = 1;
- token = c_lex (&value);
- goto linenum;
- }
- else if (!strcmp (name, "ident"))
- {
- /* #ident. We expect a string constant here.
- The pedantic warning and syntax error are now in cpp. */
-
- token = c_lex (&value);
- if (token != CPP_STRING || TREE_CODE (value) != STRING_CST)
- goto skipline;
-
#ifdef ASM_OUTPUT_IDENT
- if (! flag_no_ident)
- {
- ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (value));
- }
-#endif
-
- /* Skip the rest of this line. */
- goto skipline;
- }
-
- error ("undefined or invalid # directive `%s'", name);
- goto skipline;
- }
-
- /* If the # is the only nonwhite char on the line,
- just ignore it. Check the new newline. */
- if (token == CPP_EOF)
- goto skipline;
-
-linenum:
- /* Here we have either `#line' or `# <nonletter>'.
- In either case, it should be a line number; a digit should follow. */
-
- if (token != CPP_NUMBER || TREE_CODE (value) != INTEGER_CST)
- {
- error ("invalid #-line");
- goto skipline;
- }
-
- /* subtract one, because it is the following line that
- gets the specified number */
-
- l = TREE_INT_CST_LOW (value) - 1;
-
- /* More follows: it must be a string constant (filename).
- It would be neat to use cpplib to quickly process the string, but
- (1) we don't have a handy tokenization of the string, and
- (2) I don't know how well that would work in the presense
- of filenames that contain wide characters. */
-
- if (saw_line)
- {
- /* Don't treat \ as special if we are processing #line 1 "...".
- If you want it to be treated specially, use # 1 "...". */
- ignore_escape_flag = 1;
- }
-
- /* Read the string constant. */
- token = c_lex (&value);
-
- ignore_escape_flag = 0;
-
- if (token == CPP_EOF)
- {
- /* No more: store the line number and check following line. */
- lex_lineno = l;
- goto skipline;
- }
-
- if (token != CPP_STRING || TREE_CODE (value) != STRING_CST)
- {
- error ("invalid #line");
- goto skipline;
- }
-
- new_file = TREE_STRING_POINTER (value);
-
- if (main_input_filename == 0)
- main_input_filename = new_file;
-
- action = act_none;
- action_number = 0;
-
- /* Each change of file name
- reinitializes whether we are now in a system header. */
- in_system_header = 0;
-
- if (!read_line_number (&action_number))
- {
- /* Update the name in the top element of input_file_stack. */
- if (input_file_stack)
- input_file_stack->name = input_filename;
- }
-
- /* `1' after file name means entering new file.
- `2' after file name means just left a file. */
-
- if (action_number == 1)
- {
- action = act_push;
- read_line_number (&action_number);
- }
- else if (action_number == 2)
- {
- action = act_pop;
- read_line_number (&action_number);
- }
- if (action_number == 3)
- {
- /* `3' after file name means this is a system header file. */
- in_system_header = 1;
- read_line_number (&action_number);
- }
-#ifndef NO_IMPLICIT_EXTERN_C
- if (action_number == 4)
- {
- /* `4' after file name means this is a C header file. */
- entering_c_header = 1;
- read_line_number (&action_number);
- }
-#endif
-
- /* Do the actions implied by the preceding numbers. */
- if (action == act_push)
+ if (! flag_no_ident)
{
- lineno = lex_lineno;
- push_srcloc (input_filename, 1);
- input_file_stack->indent_level = indent_level;
- debug_start_source_file (input_filename);
-#ifndef NO_IMPLICIT_EXTERN_C
- if (c_header_level)
- ++c_header_level;
- else if (entering_c_header)
- {
- c_header_level = 1;
- ++pending_lang_change;
- }
-#endif
+ /* Convert escapes in the string. */
+ tree value = lex_string (str->text, str->len, 0);
+ ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (value));
}
- else if (action == act_pop)
- {
- /* Popping out of a file. */
- if (input_file_stack->next)
- {
-#ifndef NO_IMPLICIT_EXTERN_C
- if (c_header_level && --c_header_level == 0)
- {
- if (entering_c_header)
- 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);
- }
- else
- error ("#-lines for entering and leaving files don't match");
- }
-
- update_header_times (new_file);
-
- input_filename = new_file;
- lex_lineno = l;
-
- /* Hook for C++. */
- extract_interface_info ();
-
- /* skip the rest of this line. */
- skipline:
- linemode = 0;
-
- while (getch () != '\n');
}
-#endif
-
-/* Not yet handled: #pragma, #define, #undef.
- No need to deal with linemarkers under normal conditions. */
+/* 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_ident (pfile, str)
+cb_line_change (pfile, token, parsing_args)
cpp_reader *pfile ATTRIBUTE_UNUSED;
- const cpp_string *str;
+ const cpp_token *token;
+ int parsing_args ATTRIBUTE_UNUSED;
{
-#ifdef ASM_OUTPUT_IDENT
- if (! flag_no_ident)
- {
- /* Convert escapes in the string. */
- tree value = lex_string ((const char *)str->text, str->len, 0);
- ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (value));
- }
-#endif
+ src_lineno = SOURCE_LINE (map, token->line);
}
static void
-cb_enter_file (pfile)
- cpp_reader *pfile;
+cb_file_change (pfile, new_map)
+ cpp_reader *pfile ATTRIBUTE_UNUSED;
+ const struct line_map *new_map;
{
- cpp_buffer *ip = CPP_BUFFER (pfile);
- /* Bleah, need a better interface to this. */
- const char *flags = cpp_syshdr_flags (pfile, ip);
+ unsigned int to_line = SOURCE_LINE (new_map, new_map->to_line);
- /* Mustn't stack the main buffer on the input stack. (Ick.) */
- if (ip->prev)
+ if (new_map->reason == LC_ENTER)
{
- lex_lineno = lineno = ip->prev->lineno - 1;
- push_srcloc (ip->nominal_fname, 1);
- input_file_stack->indent_level = indent_level;
- debug_start_source_file (ip->nominal_fname);
- }
- else
- lex_lineno = 1;
-
- update_header_times (ip->nominal_fname);
-
- /* Hook for C++. */
- extract_interface_info ();
+ /* 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
+ {
+ int included_at = SOURCE_LINE (new_map - 1, new_map->from_line - 1);
- in_system_header = (flags[0] != 0);
+ lineno = included_at;
+ push_srcloc (new_map->to_file, 1);
+ (*debug_hooks->start_source_file) (included_at, new_map->to_file);
#ifndef NO_IMPLICIT_EXTERN_C
- if (c_header_level)
- ++c_header_level;
- else if (in_system_header && flags[1] != 0 && flags[2] != 0)
- {
- c_header_level = 1;
- ++pending_lang_change;
- }
+ if (c_header_level)
+ ++c_header_level;
+ else if (new_map->sysp == 2)
+ {
+ c_header_level = 1;
+ ++pending_lang_change;
+ }
#endif
-}
-
-static void
-cb_leave_file (pfile)
- cpp_reader *pfile;
-{
- /* Bleah, need a better interface to this. */
- const char *flags = cpp_syshdr_flags (pfile, CPP_BUFFER (pfile));
-
- if (input_file_stack->next)
+ }
+ }
+ else if (new_map->reason == LC_LEAVE)
{
#ifndef NO_IMPLICIT_EXTERN_C
if (c_header_level && --c_header_level == 0)
{
- if (flags[2] != 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
- /* We get called for the main buffer, but we mustn't pop it. */
pop_srcloc ();
- debug_end_source_file (input_file_stack->line);
+
+ (*debug_hooks->end_source_file) (to_line);
}
- in_system_header = (flags[0] != 0);
- lex_lineno = CPP_BUFFER (pfile)->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;
- update_header_times (input_file_stack->name);
/* Hook for C++. */
extract_interface_info ();
}
static void
-cb_rename_file (pfile)
- cpp_reader *pfile;
-{
- cpp_buffer *ip = CPP_BUFFER (pfile);
- /* Bleah, need a better interface to this. */
- const char *flags = cpp_syshdr_flags (pfile, ip);
- input_filename = ip->nominal_fname;
- lex_lineno = ip->lineno;
- in_system_header = (flags[0] != 0);
-
- update_header_times (ip->nominal_fname);
- /* 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 */
#if 0
struct try_type
{
- tree *node_var;
- char unsigned_flag;
- char long_flag;
- char long_long_flag;
+ tree *const node_var;
+ const char unsigned_flag;
+ const char long_flag;
+ const char long_long_flag;
};
struct try_type type_sequence[] =
};
#endif /* 0 */
\f
-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;
{
- 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 (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!");
/* It is not a decimal point.
It should be a digit (perhaps a hex digit). */
- if (ISDIGIT (c))
+ if (ISDIGIT (c)
+ || (base == 16 && ISXDIGIT (c)))
{
- n = c - '0';
+ n = hex_value (c);
}
else if (base <= 10 && (c == 'e' || c == 'E'))
{
floatflag = AFTER_EXPON;
break; /* start of exponent */
}
- else if (base == 16 && c >= 'a' && c <= 'f')
- {
- n = c - 'a' + 10;
- }
- else if (base == 16 && c >= 'A' && c <= 'F')
- {
- n = c - 'A' + 10;
- }
else
{
p--;
/* 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;
if (floatflag != NOT_FLOAT)
{
tree type;
- int imag, fflag, lflag, conversion_errno;
+ const char *typename;
+ int imag, fflag, lflag;
REAL_VALUE_TYPE real;
- struct pf_args args;
char *copy;
if (base == 16 && floatflag != AFTER_EXPON)
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;
ERROR ("invalid suffix on floating constant");
}
- /* Setup input for parse_float() */
- args.str = copy;
- args.fflag = fflag;
- args.lflag = lflag;
- args.base = base;
+ type = double_type_node;
+ typename = "double";
+
+ if (fflag)
+ {
+ if (lflag)
+ ERROR ("both 'f' and 'l' suffixes on floating constant");
- /* Convert string to a double, checking for overflow. */
- if (do_float_handler (parse_float, (PTR) &args))
+ type = float_type_node;
+ typename = "float";
+ }
+ else if (lflag)
+ {
+ type = long_double_type_node;
+ typename = "long double";
+ }
+ else if (flag_single_precision_constant)
{
- /* Receive output from parse_float() */
- real = args.value;
+ type = float_type_node;
+ typename = "float";
}
+
+ /* Warn about this only after we know we're not issuing an error. */
+ if (base == 16 && pedantic && !flag_isoc99)
+ pedwarn ("hexadecimal floating constants are only valid in C99");
+
+ /* The second argument, machine_mode, of REAL_VALUE_ATOF
+ tells the desired precision of the binary result
+ of decimal-to-binary conversion. */
+ if (base == 16)
+ real = REAL_VALUE_HTOF (copy, TYPE_MODE (type));
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)))
+ real = REAL_VALUE_ATOF (copy, TYPE_MODE (type));
+
+ /* 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 (real) && pedantic)
warning ("floating point number exceeds range of 'double'");
-#endif
/* Create a node with determined type and value. */
if (imag)
}
else
{
- tree trad_type, ansi_type, type;
+ tree trad_type, type;
HOST_WIDE_INT high, low;
int spec_unsigned = 0;
int spec_long = 0;
int suffix_lu = 0;
int warn = 0, i;
- trad_type = ansi_type = type = NULL_TREE;
+ trad_type = type = NULL_TREE;
while (p < str + len)
{
c = *p++;
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) = 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)
+ traditional type, then see if they disagree. */
+ if (warn_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
? 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;
+
+ /* Calculate the ISO type. */
+ if (! spec_long && ! spec_unsigned
+ && int_fits_type_p (value, integer_type_node))
+ type = integer_type_node;
+ else if (! spec_long && (base != 10 || spec_unsigned)
+ && int_fits_type_p (value, unsigned_type_node))
+ type = unsigned_type_node;
+ else if (! spec_unsigned && !spec_long_long
+ && int_fits_type_p (value, long_integer_type_node))
+ type = long_integer_type_node;
+ else if (! spec_long_long
+ && int_fits_type_p (value, long_unsigned_type_node))
+ type = long_unsigned_type_node;
+ else if (! spec_unsigned
+ && int_fits_type_p (value, long_long_integer_type_node))
+ type = long_long_integer_type_node;
+ else if (int_fits_type_p (value, long_long_unsigned_type_node))
+ type = long_long_unsigned_type_node;
+ else if (! spec_unsigned
+ && int_fits_type_p (value, widest_integer_literal_type_node))
+ type = widest_integer_literal_type_node;
+ else
+ type = widest_unsigned_literal_type_node;
/* 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)
+ && base == 10 && trad_type != 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");
+ if (TYPE_PRECISION (trad_type) != TYPE_PRECISION (type))
+ warning ("width of integer constant is different in traditional C");
+ else if (TREE_UNSIGNED (trad_type) != TREE_UNSIGNED (type))
+ warning ("integer constant is unsigned in ISO C, signed in traditional C");
else
- warning ("width of integer constant may change on other systems with -traditional");
+ warning ("width of integer constant may change on other systems in traditional C");
}
- if (pedantic && !flag_traditional && (flag_isoc99 || !spec_long_long)
+ if (pedantic && (flag_isoc99 || !spec_long_long)
&& !warn
&& ((flag_isoc99
? TYPE_PRECISION (long_long_integer_type_node)
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"));
+ ? _("an unsigned long long int")
+ : _("a long long int"))
+ : _("an unsigned long int")));
}
if (base == 10 && ! spec_unsigned && TREE_UNSIGNED (type))
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. */
+ fit in the type we choose for it, then pedwarn. */
if (! warn
&& TREE_CODE (TREE_TYPE (value)) == INTEGER_TYPE
static tree
lex_string (str, len, wide)
- const char *str;
+ const unsigned 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);
+ const unsigned char *p = str, *limit = str + len;
+ cppchar_t c;
#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)
wchar_t wc;
int char_len;
- char_len = local_mbtowc (&wc, p, limit - p);
+ char_len = local_mbtowc (&wc, (const char *) p, limit - p);
if (char_len == -1)
{
- warning ("Ignoring invalid multibyte character");
+ warning ("ignoring invalid multibyte character");
char_len = 1;
c = *p++;
}
#endif
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");
- }
+ c = cpp_parse_escape (parse_in, &p, limit, wide);
- /* Add this single character into the buffer either as a wchar_t
- or as a single byte. */
+ /* Add this single character into the buffer either as a wchar_t,
+ a multibyte sequence, or as a single byte. */
if (wide)
{
unsigned charwidth = TYPE_PRECISION (char_type_node);
}
q += WCHAR_BYTES;
}
+#ifdef MULTIBYTE_CHARS
+ else if (char_len > 1)
+ {
+ /* We're dealing with a multibyte character. */
+ for ( ; char_len >0; --char_len)
+ {
+ *q++ = *(p - char_len);
+ }
+ }
+#endif
else
{
*q++ = c;
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;
- 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)
- {
- num_chars = max_chars;
- error ("character constant too long");
- }
- else if (chars_seen != 1 && ! flag_traditional && warn_multichar)
- warning ("multi-character character constant");
+ cppchar_t result;
+ tree type, value;
+ unsigned int chars_seen;
+ int unsignedp;
+
+ result = cpp_interpret_charconst (parse_in, token,
+ &chars_seen, &unsignedp);
- /* If char type is signed, sign-extend the constant. */
- if (! wide)
- {
- 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);
- 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;
- else
- TREE_TYPE (value) = integer_type_node;
- }
+ /* Cast to cppchar_signed_t to get correct sign-extension of RESULT
+ before possibly widening to HOST_WIDE_INT for build_int_2. */
+ if (unsignedp || (cppchar_signed_t) result >= 0)
+ value = build_int_2 (result, 0);
else
- {
- value = build_int_2 (result, 0);
- TREE_TYPE (value) = wchar_type_node;
- }
+ value = build_int_2 ((cppchar_signed_t) result, -1);
+
+ if (token->type == CPP_WCHAR)
+ type = wchar_type_node;
+ /* In C, a character constant has type 'int'.
+ In C++ 'char', but multi-char charconsts have type 'int'. */
+ else if ((c_language == clk_c || c_language == clk_objective_c)
+ || chars_seen > 1)
+ type = integer_type_node;
+ else
+ type = char_type_node;
+ TREE_TYPE (value) = type;
return value;
}
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