-/* Lexical analyzer for C and Objective C.
+/* Mainly the interface between cpplib and the C front ends.
Copyright (C) 1987, 1988, 1989, 1992, 1994, 1995, 1996, 1997
- 1998, 1999, 2000 Free Software Foundation, Inc.
+ 1998, 1999, 2000, 2001, 2002, 2003 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 "coretypes.h"
+#include "tm.h"
+#include "real.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 "c-pragma.h"
#include "toplev.h"
#include "intl.h"
-#include "ggc.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
- the current floating point support. */
-#ifdef CROSS_COMPILE
-#undef MULTIBYTE_CHARS
-#endif
-
-#ifdef MULTIBYTE_CHARS
-#include "mbchar.h"
-#include <locale.h>
-#endif /* MULTIBYTE_CHARS */
-#ifndef GET_ENVIRONMENT
-#define GET_ENVIRONMENT(ENV_VALUE,ENV_NAME) ((ENV_VALUE) = getenv (ENV_NAME))
-#endif
-
-#if USE_CPPLIB
-extern cpp_reader parse_in;
-#else
-/* Stream for reading from the input file. */
-FILE *finput;
-#endif
+/* 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
-
-#if !USE_CPPLIB
-
-struct putback_buffer
-{
- unsigned char *buffer;
- int buffer_size;
- int index;
-};
-
-static struct putback_buffer putback = {NULL, 0, -1};
-
-static inline int getch PARAMS ((void));
-
-static inline int
-getch ()
-{
- if (putback.index != -1)
- {
- int ch = putback.buffer[putback.index];
- --putback.index;
- return ch;
- }
- return getc (finput);
-}
-
-static inline void put_back PARAMS ((int));
-
-static inline void
-put_back (ch)
- int ch;
-{
- if (ch != EOF)
- {
- if (putback.index == putback.buffer_size - 1)
- {
- putback.buffer_size += 16;
- putback.buffer = xrealloc (putback.buffer, putback.buffer_size);
- }
- putback.buffer[++putback.index] = ch;
- }
-}
-
-int linemode;
-
-#endif
-
/* 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)
-#if !USE_CPPLIB
-static int maxtoken; /* Current nominal length of token buffer. */
-static char *token_buffer; /* Pointer to token buffer.
- Actual allocated length is maxtoken + 2. */
-#endif
-
-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 interpret_integer PARAMS ((const cpp_token *, unsigned int));
+static tree interpret_float PARAMS ((const cpp_token *, unsigned int));
+static enum integer_type_kind
+ narrowest_unsigned_type PARAMS ((tree, unsigned int));
+static enum integer_type_kind
+ narrowest_signed_type PARAMS ((tree, unsigned int));
+static tree lex_string PARAMS ((const cpp_string *));
+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 int mark_splay_tree_node PARAMS ((splay_tree_node, void *));
-static void mark_splay_tree PARAMS ((void *));
-
-#if !USE_CPPLIB
-static int skip_white_space PARAMS ((int));
-static char *extend_token_buffer PARAMS ((const char *));
-static void extend_token_buffer_to PARAMS ((int));
-static int read_line_number PARAMS ((int *));
-static void process_directive PARAMS ((void));
-#else
-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 *));
-#endif
-
+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_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;
+void
+init_c_lex ()
{
+ struct cpp_callbacks *cb;
struct c_fileinfo *toplevel;
- /* 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);
- /* Make sure to mark the filenames in the tree for GC. */
- ggc_add_root (&file_info_tree, 1, sizeof (file_info_tree),
- mark_splay_tree);
- toplevel = get_fileinfo (ggc_strdup ("<top level>"));
+ toplevel = get_fileinfo ("<top level>");
if (flag_detailed_statistics)
{
header_time = 0;
toplevel->time = body_time;
}
-#ifdef MULTIBYTE_CHARS
- /* Change to the native locale for multibyte conversions. */
- setlocale (LC_CTYPE, "");
- GET_ENVIRONMENT (literal_codeset, "LANG");
-#endif
+ cb = cpp_get_callbacks (parse_in);
+
+ cb->line_change = cb_line_change;
+ cb->ident = cb_ident;
+ cb->def_pragma = cb_def_pragma;
+ cb->valid_pch = c_common_valid_pch;
+ cb->read_pch = c_common_read_pch;
-#if !USE_CPPLIB
- /* Open input file. */
- if (filename == 0 || !strcmp (filename, "-"))
+ /* 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))
{
- finput = stdin;
- filename = "stdin";
+ cb->define = cb_define;
+ cb->undef = cb_undef;
}
- else
- finput = fopen (filename, "r");
- if (finput == 0)
- pfatal_with_name (filename);
-
-#ifdef IO_BUFFER_SIZE
- setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE);
-#endif
-#else /* !USE_CPPLIB */
-
- 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;
-
- /* Make sure parse_in.digraphs matches flag_digraphs. */
- CPP_OPTION (&parse_in, digraphs) = flag_digraphs;
-
- if (! cpp_start_read (&parse_in, filename))
- abort ();
-
- if (filename == 0 || !strcmp (filename, "-"))
- filename = "stdin";
-#endif
-
-#if !USE_CPPLIB
- maxtoken = 40;
- token_buffer = (char *) xmalloc (maxtoken + 2);
-#endif
- /* Start it at 0, because check_newline is called at the very beginning
- and will increment it to 1. */
- lineno = lex_lineno = 0;
-
- return filename;
}
struct c_fileinfo *
splay_tree_foreach (file_info_tree, dump_one_header, 0);
}
-#if !USE_CPPLIB
-
-/* If C is not whitespace, return C.
- Otherwise skip whitespace and return first nonwhite char read. */
-
-static int
-skip_white_space (c)
- register int c;
+static void
+cb_ident (pfile, line, str)
+ cpp_reader *pfile ATTRIBUTE_UNUSED;
+ unsigned int line ATTRIBUTE_UNUSED;
+ const cpp_string *str ATTRIBUTE_UNUSED;
{
- for (;;)
+#ifdef ASM_OUTPUT_IDENT
+ if (! flag_no_ident)
{
- switch (c)
- {
- /* There is no need to process comments or backslash-newline
- here. None can occur in the output of cpp. Do handle \r
- in case someone sent us a .i file. */
-
- case '\n':
- if (linemode)
- {
- put_back (c);
- return EOF;
- }
- c = check_newline ();
- break;
-
- case '\r':
- /* Per C99, horizontal whitespace is just these four characters. */
- case ' ':
- case '\t':
- case '\f':
- case '\v':
- c = getch ();
- break;
-
- case '\\':
- error ("stray '\\' in program");
- c = getch ();
- break;
-
- default:
- return (c);
- }
+ /* Convert escapes in the string. */
+ tree value ATTRIBUTE_UNUSED = lex_string (str);
+ ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (value));
}
+#endif
}
-/* Skips all of the white space at the current location in the input file. */
-
-void
-position_after_white_space ()
-{
- register int c;
-
- c = getch ();
-
- put_back (skip_white_space (c));
-}
-
-/* Make the token buffer longer, preserving the data in it.
- P should point to just beyond the last valid character in the old buffer.
- The value we return is a pointer to the new buffer
- at a place corresponding to P. */
-
+/* 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
-extend_token_buffer_to (size)
- int size;
-{
- do
- maxtoken = maxtoken * 2 + 10;
- while (maxtoken < size);
- token_buffer = (char *) xrealloc (token_buffer, maxtoken + 2);
-}
-
-static char *
-extend_token_buffer (p)
- const char *p;
+cb_line_change (pfile, token, parsing_args)
+ cpp_reader *pfile ATTRIBUTE_UNUSED;
+ const cpp_token *token;
+ int parsing_args ATTRIBUTE_UNUSED;
{
- int offset = p - token_buffer;
- extend_token_buffer_to (offset);
- return token_buffer + offset;
+ src_lineno = SOURCE_LINE (map, token->line);
}
-\f
-static int
-read_line_number (num)
- int *num;
+void
+fe_file_change (new_map)
+ const struct line_map *new_map;
{
- tree value;
- enum cpp_ttype token = c_lex (&value);
+ unsigned int to_line = SOURCE_LINE (new_map, new_map->to_line);
- if (token == CPP_NUMBER && TREE_CODE (value) == INTEGER_CST)
+ if (new_map->reason == LC_ENTER)
{
- *num = TREE_INT_CST_LOW (value);
- return 1;
+ /* 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);
+
+ input_line = 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 (new_map->sysp == 2)
+ {
+ c_header_level = 1;
+ ++pending_lang_change;
+ }
+#endif
+ }
}
- else
+ else if (new_map->reason == LC_LEAVE)
{
- if (token != CPP_EOF)
- error ("invalid #-line");
- return 0;
+#ifndef NO_IMPLICIT_EXTERN_C
+ if (c_header_level && --c_header_level == 0)
+ {
+ if (new_map->sysp == 2)
+ warning ("badly nested C headers from preprocessor");
+ --pending_lang_change;
+ }
+#endif
+ pop_srcloc ();
+
+ (*debug_hooks->end_source_file) (to_line);
}
-}
-/* At the beginning of a line, increment the line number
- and process any #-directive on this line.
- If the line is a #-directive, read the entire line and return a newline.
- Otherwise, return the line's first non-whitespace character. */
+ update_header_times (new_map->to_file);
+ in_system_header = new_map->sysp != 0;
+ input_filename = new_map->to_file;
+ input_line = to_line;
+ map = new_map;
-int
-check_newline ()
-{
- register int c;
+ /* Hook for C++. */
+ extract_interface_info ();
+}
- /* Loop till we get a nonblank, non-directive line. */
- for (;;)
+static void
+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. */
+ if (warn_unknown_pragmas > in_system_header)
{
- /* Read first nonwhite char on the line. */
- do
- c = getch ();
- while (c == ' ' || c == '\t');
+ const unsigned char *space, *name;
+ const cpp_token *s;
- lex_lineno++;
- if (c == '#')
+ space = name = (const unsigned char *) "";
+ s = cpp_get_token (pfile);
+ if (s->type != CPP_EOF)
{
- process_directive ();
- return '\n';
+ space = cpp_token_as_text (pfile, s);
+ s = cpp_get_token (pfile);
+ if (s->type == CPP_NAME)
+ name = cpp_token_as_text (pfile, s);
}
- else if (c != '\n')
- break;
+ input_line = SOURCE_LINE (map, line);
+ warning ("ignoring #pragma %s %s", space, name);
}
- return c;
}
+/* #define callback for DWARF and DWARF2 debug info. */
static void
-process_directive ()
+cb_define (pfile, line, node)
+ cpp_reader *pfile;
+ unsigned int line;
+ cpp_hashnode *node;
{
- enum cpp_ttype token;
- tree value;
- int saw_line;
- enum { act_none, act_push, act_pop } action;
- int action_number, l;
- 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);
+ (*debug_hooks->define) (SOURCE_LINE (map, line),
+ (const char *) cpp_macro_definition (pfile, node));
+}
- 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'. */
+/* #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;
+{
+ (*debug_hooks->undef) (SOURCE_LINE (map, line),
+ (const char *) NODE_NAME (node));
+}
+\f
+int
+c_lex (value)
+ tree *value;
+{
+ const cpp_token *tok;
- const char *name = IDENTIFIER_POINTER (value);
+ retry:
+ timevar_push (TV_CPP);
+ do
+ tok = cpp_get_token (parse_in);
+ while (tok->type == CPP_PADDING);
+ timevar_pop (TV_CPP);
- 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. */
+ /* 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. */
+ input_line = src_lineno;
- token = c_lex (&value);
- if (token != CPP_STRING || TREE_CODE (value) != STRING_CST)
- goto skipline;
+ *value = NULL_TREE;
+ switch (tok->type)
+ {
+ case CPP_NAME:
+ *value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node));
+ break;
-#ifdef ASM_OUTPUT_IDENT
- if (! flag_no_ident)
- {
- ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (value));
- }
-#endif
+ case CPP_NUMBER:
+ {
+ unsigned int flags = cpp_classify_number (parse_in, tok);
- /* Skip the rest of this line. */
- goto skipline;
- }
+ switch (flags & CPP_N_CATEGORY)
+ {
+ case CPP_N_INVALID:
+ /* cpplib has issued an error. */
+ *value = error_mark_node;
+ break;
- error ("undefined or invalid # directive `%s'", name);
- goto skipline;
- }
+ case CPP_N_INTEGER:
+ *value = interpret_integer (tok, flags);
+ break;
- /* If the # is the only nonwhite char on the line,
- just ignore it. Check the new newline. */
- if (token == CPP_EOF)
- goto skipline;
+ case CPP_N_FLOATING:
+ *value = interpret_float (tok, flags);
+ break;
-linenum:
- /* Here we have either `#line' or `# <nonletter>'.
- In either case, it should be a line number; a digit should follow. */
+ default:
+ abort ();
+ }
+ }
+ break;
- if (token != CPP_NUMBER || TREE_CODE (value) != INTEGER_CST)
- {
- error ("invalid #-line");
- goto skipline;
- }
+ case CPP_OTHER:
+ {
+ cppchar_t c = tok->val.str.text[0];
- /* subtract one, because it is the following line that
- gets the specified number */
+ if (c == '"' || c == '\'')
+ error ("missing terminating %c character", (int) c);
+ else if (ISGRAPH (c))
+ error ("stray '%c' in program", (int) c);
+ else
+ error ("stray '\\%o' in program", (int) c);
+ }
+ goto retry;
- l = TREE_INT_CST_LOW (value) - 1;
+ case CPP_CHAR:
+ case CPP_WCHAR:
+ *value = lex_charconst (tok);
+ break;
- /* 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. */
+ case CPP_STRING:
+ case CPP_WSTRING:
+ *value = lex_string (&tok->val.str);
+ break;
- 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;
+ /* These tokens should not be visible outside cpplib. */
+ case CPP_HEADER_NAME:
+ case CPP_COMMENT:
+ case CPP_MACRO_ARG:
+ abort ();
+
+ default: break;
}
- /* Read the string constant. */
- token = c_lex (&value);
+ return tok->type;
+}
- ignore_escape_flag = 0;
+/* Returns the narrowest C-visible unsigned type, starting with the
+ minimum specified by FLAGS, that can fit VALUE, or itk_none if
+ there isn't one. */
+static enum integer_type_kind
+narrowest_unsigned_type (value, flags)
+ tree value;
+ unsigned int flags;
+{
+ enum integer_type_kind itk;
- if (token == CPP_EOF)
- {
- /* No more: store the line number and check following line. */
- lex_lineno = l;
- goto skipline;
- }
+ if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
+ itk = itk_unsigned_int;
+ else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM)
+ itk = itk_unsigned_long;
+ else
+ itk = itk_unsigned_long_long;
- if (token != CPP_STRING || TREE_CODE (value) != STRING_CST)
- {
- error ("invalid #line");
- goto skipline;
- }
+ /* int_fits_type_p must think the type of its first argument is
+ wider than its second argument, or it won't do the proper check. */
+ TREE_TYPE (value) = widest_unsigned_literal_type_node;
- new_file = TREE_STRING_POINTER (value);
+ for (; itk < itk_none; itk += 2 /* skip unsigned types */)
+ if (int_fits_type_p (value, integer_types[itk]))
+ return itk;
- if (main_input_filename == 0)
- main_input_filename = new_file;
+ return itk_none;
+}
- action = act_none;
- action_number = 0;
+/* Ditto, but narrowest signed type. */
+static enum integer_type_kind
+narrowest_signed_type (value, flags)
+ tree value;
+ unsigned int flags;
+{
+ enum integer_type_kind itk;
- /* Each change of file name
- reinitializes whether we are now in a system header. */
- in_system_header = 0;
+ if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
+ itk = itk_int;
+ else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM)
+ itk = itk_long;
+ else
+ itk = itk_long_long;
- 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;
- }
+ /* int_fits_type_p must think the type of its first argument is
+ wider than its second argument, or it won't do the proper check. */
+ TREE_TYPE (value) = widest_unsigned_literal_type_node;
- /* `1' after file name means entering new file.
- `2' after file name means just left a file. */
+ for (; itk < itk_none; itk += 2 /* skip signed types */)
+ if (int_fits_type_p (value, integer_types[itk]))
+ return itk;
- 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
+ return itk_none;
+}
- /* Do the actions implied by the preceding numbers. */
- if (action == act_push)
- {
- 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
- }
- else if (action == act_pop)
+/* Interpret TOKEN, an integer with FLAGS as classified by cpplib. */
+static tree
+interpret_integer (token, flags)
+ const cpp_token *token;
+ unsigned int flags;
+{
+ tree value, type;
+ enum integer_type_kind itk;
+ cpp_num integer;
+ cpp_options *options = cpp_get_options (parse_in);
+
+ integer = cpp_interpret_integer (parse_in, token, flags);
+ integer = cpp_num_sign_extend (integer, options->precision);
+ value = build_int_2_wide (integer.low, integer.high);
+
+ /* The type of a constant with a U suffix is straightforward. */
+ if (flags & CPP_N_UNSIGNED)
+ itk = narrowest_unsigned_type (value, flags);
+ else
{
- /* Popping out of a file. */
- if (input_file_stack->next)
+ /* The type of a potentially-signed integer constant varies
+ depending on the base it's in, the standard in use, and the
+ length suffixes. */
+ enum integer_type_kind itk_u = narrowest_unsigned_type (value, flags);
+ enum integer_type_kind itk_s = narrowest_signed_type (value, flags);
+
+ /* In both C89 and C99, octal and hex constants may be signed or
+ unsigned, whichever fits tighter. We do not warn about this
+ choice differing from the traditional choice, as the constant
+ is probably a bit pattern and either way will work. */
+ if ((flags & CPP_N_RADIX) != CPP_N_DECIMAL)
+ itk = MIN (itk_u, itk_s);
+ else
{
-#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)
+ /* In C99, decimal constants are always signed.
+ In C89, decimal constants that don't fit in long have
+ undefined behavior; we try to make them unsigned long.
+ In GCC's extended C89, that last is true of decimal
+ constants that don't fit in long long, too. */
+
+ itk = itk_s;
+ if (itk_s > itk_u && itk_s > itk_long)
{
- 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 ? '}' : '{');
+ if (!flag_isoc99)
+ {
+ if (itk_u < itk_unsigned_long)
+ itk_u = itk_unsigned_long;
+ itk = itk_u;
+ warning ("this decimal constant is unsigned only in ISO C90");
+ }
+ else if (warn_traditional)
+ warning ("this decimal constant would be unsigned in ISO C90");
}
-#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);
+ if (itk == itk_none)
+ /* cpplib has already issued a warning for overflow. */
+ type = ((flags & CPP_N_UNSIGNED)
+ ? widest_unsigned_literal_type_node
+ : widest_integer_literal_type_node);
+ else
+ type = integer_types[itk];
- input_filename = new_file;
- lex_lineno = l;
+ if (itk > itk_unsigned_long
+ && (flags & CPP_N_WIDTH) != CPP_N_LARGE
+ && ! in_system_header && ! flag_isoc99)
+ pedwarn ("integer constant is too large for \"%s\" type",
+ (flags & CPP_N_UNSIGNED) ? "unsigned long" : "long");
- /* Hook for C++. */
- extract_interface_info ();
+ TREE_TYPE (value) = type;
- /* skip the rest of this line. */
- skipline:
- linemode = 0;
+ /* Convert imaginary to a complex type. */
+ if (flags & CPP_N_IMAGINARY)
+ value = build_complex (NULL_TREE, convert (type, integer_zero_node), value);
- while (getch () != '\n');
+ return value;
}
-#else /* USE_CPPLIB */
-/* Not yet handled: #pragma, #define, #undef.
- No need to deal with linemarkers under normal conditions. */
-
-static void
-cb_ident (pfile, str)
- cpp_reader *pfile ATTRIBUTE_UNUSED;
- const cpp_string *str;
+/* Interpret TOKEN, a floating point number with FLAGS as classified
+ by cpplib. */
+static tree
+interpret_float (token, flags)
+ const cpp_token *token;
+ unsigned int flags;
{
-#ifdef ASM_OUTPUT_IDENT
- if (! flag_no_ident)
+ tree type;
+ tree value;
+ REAL_VALUE_TYPE real;
+ char *copy;
+ size_t copylen;
+ const char *typename;
+
+ /* FIXME: make %T work in error/warning, then we don't need typename. */
+ if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
{
- /* 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));
+ type = long_double_type_node;
+ typename = "long double";
}
-#endif
-}
-
-static void
-cb_enter_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);
-
- /* Mustn't stack the main buffer on the input stack. (Ick.) */
- if (ip->prev)
+ else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL
+ || flag_single_precision_constant)
{
- lex_lineno = lineno = ip->prev->lineno - 1;
- push_srcloc (ggc_alloc_string (ip->nominal_fname, -1), 1);
- input_file_stack->indent_level = indent_level;
- debug_start_source_file (ip->nominal_fname);
+ type = float_type_node;
+ typename = "float";
}
else
- lex_lineno = 1;
-
- update_header_times (ip->nominal_fname);
-
- /* Hook for C++. */
- extract_interface_info ();
-
- in_system_header = (flags[0] != 0);
-#ifndef NO_IMPLICIT_EXTERN_C
- if (c_header_level)
- ++c_header_level;
- else if (flags[2] != 0)
{
- c_header_level = 1;
- ++pending_lang_change;
- }
-#endif
+ type = double_type_node;
+ typename = "double";
+ }
+
+ /* Copy the constant to a nul-terminated buffer. If the constant
+ has any suffixes, cut them off; REAL_VALUE_ATOF/ REAL_VALUE_HTOF
+ can't handle them. */
+ copylen = token->val.str.len;
+ if ((flags & CPP_N_WIDTH) != CPP_N_MEDIUM)
+ /* Must be an F or L suffix. */
+ copylen--;
+ if (flags & CPP_N_IMAGINARY)
+ /* I or J suffix. */
+ copylen--;
+
+ copy = alloca (copylen + 1);
+ memcpy (copy, token->val.str.text, copylen);
+ copy[copylen] = '\0';
+
+ real_from_string (&real, copy);
+ real_convert (&real, TYPE_MODE (type), &real);
+
+ /* A diagnostic is required for "soft" overflow by some ISO C
+ testsuites. This is not pedwarn, because some people don't want
+ an error for this.
+ ??? That's a dubious reason... is this a mandatory diagnostic or
+ isn't it? -- zw, 2001-08-21. */
+ if (REAL_VALUE_ISINF (real) && pedantic)
+ warning ("floating constant exceeds range of \"%s\"", typename);
+
+ /* Create a node with determined type and value. */
+ value = build_real (type, real);
+ if (flags & CPP_N_IMAGINARY)
+ value = build_complex (NULL_TREE, convert (type, integer_zero_node), value);
+
+ return value;
}
-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 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. */
- if (input_file_stack->next)
- pop_srcloc ();
- in_system_header = (flags[0] != 0);
-#ifndef NO_IMPLICIT_EXTERN_C
- if (c_header_level && --c_header_level == 0)
- {
- if (flags[2] != 0)
- warning ("badly nested C headers from preprocessor");
- --pending_lang_change;
- }
-#endif
- lex_lineno = CPP_BUFFER (pfile)->lineno;
- debug_end_source_file (input_file_stack->line);
-
- 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 = ggc_alloc_string (ip->nominal_fname, -1);
- 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)
- cpp_reader *pfile;
-{
- /* 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. */
- if (warn_unknown_pragmas > in_system_header)
- {
- const unsigned char *space, *name = 0;
- 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);
-
- if (name)
- warning ("ignoring #pragma %s %s", space, name);
- else
- warning ("ignoring #pragma %s", space);
- }
-}
-#endif /* USE_CPPLIB */
-
-/* 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;
-{
- 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;
-}
-
-/* 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;
-{
- 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;
-}
-
-#if 0 /* not yet */
-/* Returns nonzero if C is a universal-character-name. Give an error if it
- 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 *node_var;
- char unsigned_flag;
- char long_flag;
- 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 */
-\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;
-{
-#if USE_CPPLIB
- cpp_token tok;
- enum cpp_ttype type;
-
- retry:
- timevar_push (TV_CPP);
- cpp_get_token (&parse_in, &tok);
- 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;
-
- *value = NULL_TREE;
- lineno = lex_lineno;
- type = tok.type;
- switch (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 = get_identifier ((const char *)tok.val.node->name);
- break;
-
- case CPP_INT:
- case CPP_FLOAT:
- 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 ((const char *)tok.val.str.text,
- tok.val.str.len, tok.type == CPP_WCHAR);
- 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);
- break;
-
- /* These tokens should not be visible outside cpplib. */
- case CPP_HEADER_NAME:
- case CPP_COMMENT:
- case CPP_MACRO_ARG:
- case CPP_PLACEMARKER:
- abort ();
-
- default: break;
- }
-
- return type;
-
-#else
- int c;
- char *p;
- int wide_flag = 0;
- int objc_flag = 0;
- int charconst = 0;
-
- *value = NULL_TREE;
-
- retry:
- c = getch ();
-
- /* Effectively do c = skip_white_space (c)
- but do it faster in the usual cases. */
- while (1)
- switch (c)
- {
- case ' ':
- case '\t':
- case '\f':
- case '\v':
- c = getch ();
- break;
-
- case '\r':
- case '\n':
- c = skip_white_space (c);
- default:
- goto found_nonwhite;
- }
- found_nonwhite:
-
- lineno = lex_lineno;
-
- switch (c)
- {
- case EOF:
- return CPP_EOF;
-
- case 'L':
- /* Capital L may start a wide-string or wide-character constant. */
- {
- register int c1 = getch();
- if (c1 == '\'')
- {
- wide_flag = 1;
- goto char_constant;
- }
- if (c1 == '"')
- {
- wide_flag = 1;
- goto string_constant;
- }
- put_back (c1);
- }
- goto letter;
-
- case '@':
- if (!doing_objc_thang)
- goto straychar;
- else
- {
- /* '@' may start a constant string object. */
- register int c1 = getch ();
- if (c1 == '"')
- {
- objc_flag = 1;
- goto string_constant;
- }
- put_back (c1);
- /* Fall through to treat '@' as the start of an identifier. */
- }
-
- case 'A': case 'B': case 'C': case 'D': case 'E':
- case 'F': case 'G': case 'H': case 'I': case 'J':
- case 'K': case 'M': case 'N': case 'O':
- case 'P': case 'Q': case 'R': case 'S': case 'T':
- case 'U': case 'V': case 'W': case 'X': case 'Y':
- case 'Z':
- case 'a': case 'b': case 'c': case 'd': case 'e':
- case 'f': case 'g': case 'h': case 'i': case 'j':
- case 'k': case 'l': case 'm': case 'n': case 'o':
- case 'p': case 'q': case 'r': case 's': case 't':
- case 'u': case 'v': case 'w': case 'x': case 'y':
- case 'z':
- case '_':
- case '$':
- letter:
- p = token_buffer;
- while (ISALNUM (c) || c == '_' || c == '$' || c == '@')
- {
- /* Make sure this char really belongs in an identifier. */
- if (c == '$')
- {
- if (! dollars_in_ident)
- error ("'$' in identifier");
- else if (pedantic)
- pedwarn ("'$' in identifier");
- }
-
- if (p >= token_buffer + maxtoken)
- p = extend_token_buffer (p);
-
- *p++ = c;
- c = getch();
- }
-
- put_back (c);
-
- if (p >= token_buffer + maxtoken)
- p = extend_token_buffer (p);
- *p = 0;
-
- *value = get_identifier (token_buffer);
- return CPP_NAME;
-
- case '.':
- {
- /* It's hard to preserve tokenization on '.' because
- it could be a symbol by itself, or it could be the
- start of a floating point number and cpp won't tell us. */
- int c1 = getch ();
- if (c1 == '.')
- {
- int c2 = getch ();
- if (c2 == '.')
- return CPP_ELLIPSIS;
-
- put_back (c2);
- error ("parse error at '..'");
- }
- else if (c1 == '*' && c_language == clk_cplusplus)
- return CPP_DOT_STAR;
-
- put_back (c1);
- if (ISDIGIT (c1))
- goto number;
- }
- return CPP_DOT;
-
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- number:
- p = token_buffer;
- /* Scan the next preprocessing number. All C numeric constants
- are preprocessing numbers, but not all preprocessing numbers
- are valid numeric constants. Preprocessing numbers fit the
- regular expression \.?[0-9]([0-9a-zA-Z_.]|[eEpP][+-])*
- See C99 section 6.4.8. */
- for (;;)
- {
- if (p >= token_buffer + maxtoken)
- p = extend_token_buffer (p);
-
- *p++ = c;
- c = getch();
-
- if (c == '+' || c == '-')
- {
- int d = p[-1];
- if (d == 'e' || d == 'E' || d == 'p' || d == 'P')
- continue;
- }
- if (ISALNUM (c) || c == '_' || c == '.')
- continue;
- break;
- }
- put_back (c);
-
- *value = lex_number (token_buffer, p - token_buffer);
- return CPP_NUMBER;
-
- case '\'':
- char_constant:
- charconst = 1;
-
- case '"':
- string_constant:
- {
- int delimiter = charconst ? '\'' : '"';
-#ifdef MULTIBYTE_CHARS
- int longest_char = local_mb_cur_max ();
- (void) local_mbtowc (NULL_PTR, NULL_PTR, 0);
-#endif
- c = getch ();
- p = token_buffer + 1;
-
- while (c != delimiter && c != EOF)
- {
- if (p + 2 > token_buffer + maxtoken)
- p = extend_token_buffer (p);
-
- /* ignore_escape_flag is set for reading the filename in #line. */
- if (!ignore_escape_flag && c == '\\')
- {
- *p++ = c;
- *p++ = getch (); /* escaped character */
- c = getch ();
- continue;
- }
- else
- {
-#ifdef MULTIBYTE_CHARS
- int i;
- int char_len = -1;
- for (i = 0; i < longest_char; ++i)
- {
- if (p + i >= token_buffer + maxtoken)
- p = extend_token_buffer (p);
- p[i] = c;
-
- char_len = local_mblen (p, i + 1);
- if (char_len != -1)
- break;
- c = getch ();
- }
- if (char_len == -1)
- {
- /* Replace all except the first byte. */
- put_back (c);
- for (--i; i > 0; --i)
- put_back (p[i]);
- char_len = 1;
- }
- /* mbtowc sometimes needs an extra char before accepting */
- else if (char_len <= i)
- put_back (c);
-
- p += char_len;
-#else
- *p++ = c;
-#endif
- c = getch ();
- }
- }
- }
-
- if (charconst)
- {
- *value = lex_charconst (token_buffer + 1, p - (token_buffer + 1),
- wide_flag);
- return wide_flag ? CPP_WCHAR : CPP_CHAR;
- }
- else
- {
- *value = lex_string (token_buffer + 1, p - (token_buffer + 1),
- wide_flag);
- return wide_flag ? CPP_WSTRING : objc_flag ? CPP_OSTRING : CPP_STRING;
- }
-
- case '+':
- case '-':
- case '&':
- case '|':
- case ':':
- case '<':
- case '>':
- case '*':
- case '/':
- case '%':
- case '^':
- case '!':
- case '=':
- {
- int c1;
- enum cpp_ttype type = CPP_EOF;
-
- switch (c)
- {
- case '+': type = CPP_PLUS; break;
- case '-': type = CPP_MINUS; break;
- case '&': type = CPP_AND; break;
- case '|': type = CPP_OR; break;
- case ':': type = CPP_COLON; break;
- case '<': type = CPP_LESS; break;
- case '>': type = CPP_GREATER; break;
- case '*': type = CPP_MULT; break;
- case '/': type = CPP_DIV; break;
- case '%': type = CPP_MOD; break;
- case '^': type = CPP_XOR; break;
- case '!': type = CPP_NOT; break;
- case '=': type = CPP_EQ; break;
- }
-
- c1 = getch ();
-
- if (c1 == '=' && type < CPP_LAST_EQ)
- return type + (CPP_EQ_EQ - CPP_EQ);
- else if (c == c1)
- switch (c)
- {
- case '+': return CPP_PLUS_PLUS;
- case '-': return CPP_MINUS_MINUS;
- case '&': return CPP_AND_AND;
- case '|': return CPP_OR_OR;
- case ':':
- if (c_language == clk_cplusplus)
- return CPP_SCOPE;
- break;
-
- case '<': type = CPP_LSHIFT; goto do_triad;
- case '>': type = CPP_RSHIFT; goto do_triad;
- }
- else
- switch (c)
- {
- case '-':
- if (c1 == '>')
- {
- if (c_language == clk_cplusplus)
- {
- c1 = getch ();
- if (c1 == '*')
- return CPP_DEREF_STAR;
- put_back (c1);
- }
- return CPP_DEREF;
- }
- break;
-
- case '>':
- if (c1 == '?' && c_language == clk_cplusplus)
- { type = CPP_MAX; goto do_triad; }
- break;
-
- case '<':
- if (c1 == ':' && flag_digraphs)
- return CPP_OPEN_SQUARE;
- if (c1 == '%' && flag_digraphs)
- { indent_level++; return CPP_OPEN_BRACE; }
- if (c1 == '?' && c_language == clk_cplusplus)
- { type = CPP_MIN; goto do_triad; }
- break;
-
- case ':':
- if (c1 == '>' && flag_digraphs)
- return CPP_CLOSE_SQUARE;
- break;
- case '%':
- if (c1 == '>' && flag_digraphs)
- { indent_level--; return CPP_CLOSE_BRACE; }
- break;
- }
-
- put_back (c1);
- return type;
-
- do_triad:
- c1 = getch ();
- if (c1 == '=')
- type += (CPP_EQ_EQ - CPP_EQ);
- else
- put_back (c1);
- return type;
- }
-
- case '~': return CPP_COMPL;
- case '?': return CPP_QUERY;
- case ',': return CPP_COMMA;
- case '(': return CPP_OPEN_PAREN;
- case ')': return CPP_CLOSE_PAREN;
- case '[': return CPP_OPEN_SQUARE;
- case ']': return CPP_CLOSE_SQUARE;
- case '{': indent_level++; return CPP_OPEN_BRACE;
- case '}': indent_level--; return CPP_CLOSE_BRACE;
- case ';': return CPP_SEMICOLON;
-
- straychar:
- default:
- if (ISGRAPH (c))
- error ("stray '%c' in program", c);
- else
- error ("stray '\\%#o' in program", c);
- goto retry;
- }
- /* NOTREACHED */
-#endif
-}
-
-
-#define ERROR(msgid) do { error(msgid); goto syntax_error; } while(0)
-
static tree
-lex_number (str, len)
- const char *str;
- unsigned int len;
+lex_string (str)
+ const cpp_string *str;
{
- int base = 10;
- int count = 0;
- int largest_digit = 0;
- int numdigits = 0;
- int overflow = 0;
- int c;
+ bool wide;
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];
+ char *buf, *q;
+ cppchar_t c;
+ const unsigned char *p, *limit;
- /* 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 (base == 16 && pedantic && !flag_isoc99)
- pedwarn ("floating constant may not be in radix 16");
- else 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))
- {
- n = c - '0';
- }
- 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 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--;
- 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 && 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)
- 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)
- 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)
- 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_PTR, NULL_PTR, 0);
-#endif
+ wide = str->text[0] == 'L';
+ p = str->text + 1 + wide;
+ limit = str->text + str->len - 1;
+ q = buf = alloca ((str->len + 1) * (wide ? WCHAR_BYTES : 1));
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)
- {
- 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);
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
+ cppchar_t result;
+ tree type, value;
+ unsigned int chars_seen;
+ int unsignedp;
- 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
+ result = cpp_interpret_charconst (parse_in, token,
+ &chars_seen, &unsignedp);
- ++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");
-
- /* 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) || chars_seen > 1)
+ type = integer_type_node;
+ else
+ type = char_type_node;
+ TREE_TYPE (value) = type;
return value;
}
-
-/* Mark for GC a node in a splay tree whose keys are strings. */
-
-static int
-mark_splay_tree_node (n, data)
- splay_tree_node n;
- void *data ATTRIBUTE_UNUSED;
-{
- ggc_mark_string ((char *) n->key);
- return 0;
-}
-
-/* Mark for GC a splay tree whose keys are strings. */
-
-static void
-mark_splay_tree (p)
- void *p;
-{
- splay_tree st = *(splay_tree *) p;
-
- splay_tree_foreach (st, mark_splay_tree_node, NULL);
-}
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