aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.2.1-5666.3/gcc/c-lex.c
diff options
context:
space:
mode:
Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/c-lex.c')
-rw-r--r--gcc-4.2.1-5666.3/gcc/c-lex.c1107
1 files changed, 1107 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/c-lex.c b/gcc-4.2.1-5666.3/gcc/c-lex.c
new file mode 100644
index 000000000..36db10b04
--- /dev/null
+++ b/gcc-4.2.1-5666.3/gcc/c-lex.c
@@ -0,0 +1,1107 @@
+/* Mainly the interface between cpplib and the C front ends.
+ Copyright (C) 1987, 1988, 1989, 1992, 1994, 1995, 1996, 1997
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+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.
+
+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 GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+
+#include "real.h"
+#include "rtl.h"
+#include "tree.h"
+#include "input.h"
+#include "output.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 "tm_p.h"
+#include "splay-tree.h"
+#include "debug.h"
+/* APPLE LOCAL AltiVec */
+#include "../libcpp/internal.h"
+
+/* We may keep statistics about how long which files took to compile. */
+static int header_time, body_time;
+static splay_tree file_info_tree;
+
+int pending_lang_change; /* If we need to switch languages - C++ only */
+int c_header_level; /* depth in C headers - C++ only */
+
+/* If we need to translate characters received. This is tri-state:
+ 0 means use only the untranslated string; 1 means use only
+ the translated string; -1 means chain the translated string
+ to the untranslated one. */
+int c_lex_string_translate = 1;
+
+/* True if strings should be passed to the caller of c_lex completely
+ unmolested (no concatenation, no translation). */
+bool c_lex_return_raw_strings = false;
+
+/* APPLE LOCAL begin CW asm blocks */
+void iasm_skip_to_eol (void);
+
+/* This points to the token that we're going to save briefly while
+ returning EOL/BOL tokens. (This is global but static instead
+ static in c_lex() so as to avoid pointless init in non-asm
+ case.) */
+static const cpp_token *iasm_saved_token = NULL;
+
+/* This tracks recursion in c_lex calls. Lexer recursion can happen
+ in pragma processing for instance, but we don't any of the asm
+ special handling to be active then. */
+static int c_lex_depth;
+
+void
+iasm_skip_to_eol (void)
+{
+ const cpp_token *tok;
+ int old_lang = CPP_OPTION (parse_in, lang);
+
+ /* Avoid problems with unmatches '" in comments. */
+ CPP_OPTION (parse_in, lang) = CLK_ASM;
+ do
+ tok = cpp_get_token (parse_in);
+ while (tok->type != CPP_EOF && !(tok->flags & BOL));
+
+ CPP_OPTION (parse_in, lang) = old_lang;
+
+ /* Now put it back. */
+ _cpp_backup_tokens (parse_in, 1);
+}
+/* APPLE LOCAL end CW asm blocks */
+
+static tree interpret_integer (const cpp_token *, unsigned int);
+static tree interpret_float (const cpp_token *, unsigned int);
+static enum integer_type_kind narrowest_unsigned_type
+ (unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT, unsigned int);
+static enum integer_type_kind narrowest_signed_type
+ (unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT, unsigned int);
+static enum cpp_ttype lex_string (const cpp_token *, tree *, bool);
+static tree lex_charconst (const cpp_token *);
+static void update_header_times (const char *);
+static int dump_one_header (splay_tree_node, void *);
+static void cb_line_change (cpp_reader *, const cpp_token *, int);
+static void cb_ident (cpp_reader *, unsigned int, const cpp_string *);
+static void cb_def_pragma (cpp_reader *, unsigned int);
+static void cb_define (cpp_reader *, unsigned int, cpp_hashnode *);
+static void cb_undef (cpp_reader *, unsigned int, cpp_hashnode *);
+
+void
+init_c_lex (void)
+{
+ struct cpp_callbacks *cb;
+ struct c_fileinfo *toplevel;
+
+ /* The get_fileinfo data structure must be initialized before
+ cpp_read_main_file is called. */
+ toplevel = get_fileinfo ("<top level>");
+ if (flag_detailed_statistics)
+ {
+ header_time = 0;
+ body_time = get_run_time ();
+ toplevel->time = body_time;
+ }
+
+ 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;
+
+ /* Set the debug callbacks if we can use them. */
+ if (debug_info_level == DINFO_LEVEL_VERBOSE
+ && (write_symbols == DWARF2_DEBUG
+ || write_symbols == VMS_AND_DWARF2_DEBUG))
+ {
+ cb->define = cb_define;
+ cb->undef = cb_undef;
+ }
+}
+
+struct c_fileinfo *
+get_fileinfo (const char *name)
+{
+ splay_tree_node n;
+ struct c_fileinfo *fi;
+
+ if (!file_info_tree)
+ file_info_tree = splay_tree_new ((splay_tree_compare_fn) strcmp,
+ 0,
+ (splay_tree_delete_value_fn) free);
+
+ n = splay_tree_lookup (file_info_tree, (splay_tree_key) name);
+ if (n)
+ return (struct c_fileinfo *) n->value;
+
+ fi = XNEW (struct c_fileinfo);
+ fi->time = 0;
+ fi->interface_only = 0;
+ fi->interface_unknown = 1;
+ splay_tree_insert (file_info_tree, (splay_tree_key) name,
+ (splay_tree_value) fi);
+ return fi;
+}
+
+static void
+update_header_times (const char *name)
+{
+ /* Changing files again. This means currently collected time
+ is charged against header time, and body time starts back at 0. */
+ if (flag_detailed_statistics)
+ {
+ int this_time = get_run_time ();
+ struct c_fileinfo *file = get_fileinfo (name);
+ header_time += this_time - body_time;
+ file->time += this_time - body_time;
+ body_time = this_time;
+ }
+}
+
+static int
+dump_one_header (splay_tree_node n, void * ARG_UNUSED (dummy))
+{
+ print_time ((const char *) n->key,
+ ((struct c_fileinfo *) n->value)->time);
+ return 0;
+}
+
+void
+dump_time_statistics (void)
+{
+ struct c_fileinfo *file = get_fileinfo (input_filename);
+ int this_time = get_run_time ();
+ file->time += this_time - body_time;
+
+ fprintf (stderr, "\n******\n");
+ print_time ("header files (total)", header_time);
+ print_time ("main file (total)", this_time - body_time);
+ fprintf (stderr, "ratio = %g : 1\n",
+ (double) header_time / (double) (this_time - body_time));
+ fprintf (stderr, "\n******\n");
+
+ splay_tree_foreach (file_info_tree, dump_one_header, 0);
+}
+
+static void
+cb_ident (cpp_reader * ARG_UNUSED (pfile),
+ unsigned int ARG_UNUSED (line),
+ const cpp_string * ARG_UNUSED (str))
+{
+#ifdef ASM_OUTPUT_IDENT
+ if (!flag_no_ident)
+ {
+ /* Convert escapes in the string. */
+ cpp_string cstr = { 0, 0 };
+ /* APPLE LOCAL pascal strings */
+ if (cpp_interpret_string (pfile, str, 1, &cstr, false, false))
+ {
+ ASM_OUTPUT_IDENT (asm_out_file, (const char *) cstr.text);
+ free ((void *) cstr.text);
+ }
+ }
+#endif
+}
+
+/* Called at the start of every non-empty line. TOKEN is the first
+ lexed token on the line. Used for diagnostic line numbers. */
+static void
+cb_line_change (cpp_reader * ARG_UNUSED (pfile), const cpp_token *token,
+ int parsing_args)
+{
+ if (token->type != CPP_EOF && !parsing_args)
+#ifdef USE_MAPPED_LOCATION
+ input_location = token->src_loc;
+#else
+ {
+ source_location loc = token->src_loc;
+ const struct line_map *map = linemap_lookup (&line_table, loc);
+ input_line = SOURCE_LINE (map, loc);
+ }
+#endif
+}
+
+void
+fe_file_change (const struct line_map *new_map)
+{
+ if (new_map == NULL)
+ return;
+
+ if (new_map->reason == LC_ENTER)
+ {
+ /* Don't stack the main buffer on the input stack;
+ we already did in compile_file. */
+ if (!MAIN_FILE_P (new_map))
+ {
+#ifdef USE_MAPPED_LOCATION
+ int included_at = LAST_SOURCE_LINE_LOCATION (new_map - 1);
+
+ input_location = included_at;
+ push_srcloc (new_map->start_location);
+#else
+ int included_at = LAST_SOURCE_LINE (new_map - 1);
+
+ input_line = included_at;
+ push_srcloc (new_map->to_file, 1);
+#endif
+ /* APPLE LOCAL begin 4137741 */
+ /* Call through the debug hook, unless this is being deferred. */
+ if (!CPP_OPTION (parse_in, defer_file_change_debug_hooks))
+ (*debug_hooks->start_source_file) (included_at, new_map->to_file);
+ /* APPLE LOCAL end 4137741 */
+#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 if (new_map->reason == LC_LEAVE)
+ {
+#ifndef NO_IMPLICIT_EXTERN_C
+ if (c_header_level && --c_header_level == 0)
+ {
+ if (new_map->sysp == 2)
+ warning (0, "badly nested C headers from preprocessor");
+ --pending_lang_change;
+ }
+#endif
+ pop_srcloc ();
+
+ /* APPLE LOCAL begin 4137741 */
+ /* Call through the debug hook, unless this is being deferred. */
+ if (!CPP_OPTION (parse_in, defer_file_change_debug_hooks))
+ (*debug_hooks->end_source_file) (new_map->to_line);
+ /* APPLE LOCAL end 4137741 */
+ }
+
+ update_header_times (new_map->to_file);
+ in_system_header = new_map->sysp != 0;
+#ifdef USE_MAPPED_LOCATION
+ input_location = new_map->start_location;
+#else
+ input_filename = new_map->to_file;
+ input_line = new_map->to_line;
+#endif
+}
+
+static void
+cb_def_pragma (cpp_reader *pfile, source_location loc)
+{
+ /* 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;
+ const cpp_token *s;
+#ifndef USE_MAPPED_LOCATION
+ location_t fe_loc;
+ const struct line_map *map = linemap_lookup (&line_table, loc);
+ fe_loc.file = map->to_file;
+ fe_loc.line = SOURCE_LINE (map, loc);
+#else
+ location_t fe_loc = loc;
+#endif
+
+ space = name = (const unsigned char *) "";
+ s = cpp_get_token (pfile);
+ if (s->type != CPP_EOF)
+ {
+ space = cpp_token_as_text (pfile, s);
+ s = cpp_get_token (pfile);
+ if (s->type == CPP_NAME)
+ name = cpp_token_as_text (pfile, s);
+ }
+
+ warning (OPT_Wunknown_pragmas, "%Hignoring #pragma %s %s",
+ &fe_loc, space, name);
+ }
+}
+
+/* #define callback for DWARF and DWARF2 debug info. */
+static void
+cb_define (cpp_reader *pfile, source_location loc, cpp_hashnode *node)
+{
+ const struct line_map *map = linemap_lookup (&line_table, loc);
+ (*debug_hooks->define) (SOURCE_LINE (map, loc),
+ (const char *) cpp_macro_definition (pfile, node));
+}
+
+/* #undef callback for DWARF and DWARF2 debug info. */
+static void
+cb_undef (cpp_reader * ARG_UNUSED (pfile), source_location loc,
+ cpp_hashnode *node)
+{
+ const struct line_map *map = linemap_lookup (&line_table, loc);
+ (*debug_hooks->undef) (SOURCE_LINE (map, loc),
+ (const char *) NODE_NAME (node));
+}
+
+/* Read a token and return its type. Fill *VALUE with its value, if
+ applicable. Fill *CPP_FLAGS with the token's flags, if it is
+ non-NULL. */
+
+enum cpp_ttype
+/* APPLE LOCAL CW asm blocks C++ comments 6338079 */
+c_lex_with_flags (tree *value, location_t *loc, unsigned char *cpp_flags, int defer)
+{
+ static bool no_more_pch;
+ const cpp_token *tok;
+ enum cpp_ttype type;
+ unsigned char add_flags = 0;
+ /* APPLE LOCAL CW asm blocks C++ */
+ const cpp_token *lasttok;
+ /* APPLE LOCAL begin CW asm blocks */
+ /* Make a local copy of the flag for efficiency, since the compiler can't
+ figure that it won't change during a compilation. */
+ int flag_iasm_blocks_local = flag_iasm_blocks;
+ if (flag_iasm_blocks_local)
+ ++c_lex_depth;
+ /* APPLE LOCAL end CW asm blocks */
+
+ timevar_push (TV_CPP);
+ retry:
+ /* APPLE LOCAL begin CW asm blocks */
+ /* If there's a token we saved while returning the special BOL
+ token, return it now. */
+ if (iasm_saved_token)
+ {
+ tok = iasm_saved_token;
+ type = tok->type;
+ iasm_saved_token = NULL;
+ goto bypass;
+ }
+ /* APPLE LOCAL end CW asm blocks */
+ tok = cpp_get_token (parse_in);
+ type = tok->type;
+
+ /* APPLE LOCAL begin CW asm blocks */
+ /* This test should be as efficient as possible, because it affects
+ all lexing with or without CW asm enabled. */
+ if (flag_iasm_blocks_local && iasm_state != iasm_none && c_lex_depth == 1
+ && type != CPP_PADDING)
+ {
+ /* "}" switches us out of our special mode. */
+ if (tok->type == CPP_CLOSE_BRACE && iasm_state >= iasm_decls)
+ iasm_state = iasm_none;
+
+ /* This is tricky. We're only ready to start parsing assembly
+ instructions if we're in the asm block, we're not in the
+ middle of parsing a C decl, and the next token is plausibly
+ the beginning of an asm line. This works because if we have
+ a "typedef int nop", a nop at the beginning of a line should
+ be taken as an instruction rather than a declaration of type
+ nop. (Doesn't have to go this way, but it's how CW works.)
+ We're not quite as good as CW yet, because CW knows about the
+ complete list of valid opcodes, and will try to take anything
+ as a decl that is not in the opcode list. */
+ if (iasm_state == iasm_decls
+ && !iasm_in_decl)
+ {
+ if (tok->type == CPP_ATSIGN
+ || tok->type == CPP_DOT
+ || (tok->type == CPP_SEMICOLON)
+ || (tok->type == CPP_NAME
+ && (*value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node)))
+ && !iasm_typename_or_reserved (*value)))
+ {
+ iasm_state = iasm_asm;
+ inside_iasm_block = true;
+ }
+ else
+ {
+ iasm_in_decl = true;
+ }
+ }
+ }
+ bypass:
+ /* APPLE LOCAL end CW asm blocks */
+
+ retry_after_at:
+#ifdef USE_MAPPED_LOCATION
+ *loc = tok->src_loc;
+#else
+ *loc = input_location;
+#endif
+ switch (type)
+ {
+ case CPP_PADDING:
+ goto retry;
+
+ case CPP_NAME:
+ *value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node));
+ /* APPLE LOCAL begin CW asm blocks */
+ if (iasm_state >= iasm_decls
+ && flag_ms_asms
+ && strcasecmp (IDENTIFIER_POINTER (HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node))),
+ "offset") == 0)
+ {
+ type = CPP_AND;
+ *value = NULL_TREE;
+ break;
+ }
+ /* APPLE LOCAL end CW asm blocks */
+ break;
+
+ case CPP_NUMBER:
+ {
+ /* APPLE LOCAL CW asm blocks C++ comments 6338079 */
+ unsigned int flags = cpp_classify_number (parse_in, tok, defer);
+
+ switch (flags & CPP_N_CATEGORY)
+ {
+ case CPP_N_INVALID:
+ /* APPLE LOCAL begin CW asm blocks C++ comments 6338079 */
+ if (flags & CPP_N_DEFER)
+ {
+ add_flags = ERROR_DEFERRED;
+ *value = error_mark_node;
+ break;
+ }
+ /* APPLE LOCAL end CW asm blocks C++ comments 6338079 */
+
+ /* cpplib has issued an error. */
+ *value = error_mark_node;
+ errorcount++;
+ break;
+
+ case CPP_N_INTEGER:
+ /* C++ uses '0' to mark virtual functions as pure.
+ Set PURE_ZERO to pass this information to the C++ parser. */
+ if (tok->val.str.len == 1 && *tok->val.str.text == '0')
+ add_flags = PURE_ZERO;
+ *value = interpret_integer (tok, flags);
+ break;
+
+ case CPP_N_FLOATING:
+ *value = interpret_float (tok, flags);
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+ }
+ break;
+
+ case CPP_ATSIGN:
+ /* APPLE LOCAL begin CW asm blocks */
+ if (iasm_state >= iasm_decls)
+ {
+ /* Return the @-sign verbatim. */
+ *value = NULL_TREE;
+ break;
+ }
+ lasttok = tok;
+ /* APPLE LOCAL end CW asm blocks */
+
+ /* An @ may give the next token special significance in Objective-C. */
+ if (c_dialect_objc ())
+ {
+ location_t atloc = input_location;
+
+ /* APPLE LOCAL CW asm blocks */
+ ++parse_in->keep_tokens;
+ retry_at:
+ tok = cpp_get_token (parse_in);
+ type = tok->type;
+ switch (type)
+ {
+ case CPP_PADDING:
+ goto retry_at;
+
+ case CPP_STRING:
+ case CPP_WSTRING:
+ type = lex_string (tok, value, true);
+ break;
+
+ case CPP_NAME:
+ *value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node));
+ if (objc_is_reserved_word (*value))
+ {
+ type = CPP_AT_NAME;
+ break;
+ }
+ /* FALLTHROUGH */
+
+ default:
+ /* APPLE LOCAL begin CW asm blocks C++ */
+ if (flag_iasm_blocks_local)
+ {
+ /* This is necessary for C++, as we don't have the tight
+ integration between the lexer and the parser... */
+ _cpp_backup_tokens (parse_in, 1);
+ /* Return the @-sign verbatim. */
+ *value = NULL;
+ tok = lasttok;
+ type = tok->type;
+ break;
+ }
+ /* APPLE LOCAL end CW asm blocks C++ */
+
+ /* ... or not. */
+ error ("%Hstray %<@%> in program", &atloc);
+ goto retry_after_at;
+ }
+ /* APPLE LOCAL CW asm blocks */
+ --parse_in->keep_tokens;
+ break;
+ }
+ /* APPLE LOCAL begin CW asm blocks C++ */
+ if (flag_iasm_blocks_local)
+ {
+ /* This is necessary for C++, as we don't have the tight
+ integration between the lexer and the parser... */
+ /* Return the @-sign verbatim. */
+ *value = NULL;
+ break;
+ }
+ /* APPLE LOCAL end CW asm blocks C++ */
+
+ /* FALLTHROUGH */
+ case CPP_HASH:
+ case CPP_PASTE:
+ /* APPLE LOCAL begin CW asm blocks C++ comments 4248139 */
+ /* Because we don't recognize inline asm commments during
+ lexing, we have to pass this back to the parser to error out
+ with or eat as a comment as appropriate. */
+ if (flag_iasm_blocks_local)
+ {
+ *value = NULL;
+ break;
+ }
+ /* APPLE LOCAL end CW asm blocks C++ comments 4248139 */
+ {
+ unsigned char name[4];
+
+ *cpp_spell_token (parse_in, tok, name, true) = 0;
+
+ error ("stray %qs in program", name);
+ }
+
+ goto retry;
+
+ case CPP_OTHER:
+ {
+ cppchar_t c = tok->val.str.text[0];
+
+ /* APPLE LOCAL begin CW asm blocks C++ comments 4248139 */
+ /* Because we don't recognize inline asm commments during
+ lexing, we have to pass this back to the parser to error
+ out with or eat as a comment as appropriate. */
+ if (defer && flag_iasm_blocks_local)
+ {
+ *value = build_int_cst_wide (char_type_node, c, 0);
+ break;
+ }
+ /* APPLE LOCAL end CW asm blocks C++ comments 4248139 */
+ if (c == '"' || c == '\'')
+ error ("missing terminating %c character", (int) c);
+ else if (ISGRAPH (c))
+ error ("stray %qc in program", (int) c);
+ else
+ error ("stray %<\\%o%> in program", (int) c);
+ }
+ goto retry;
+
+ case CPP_CHAR:
+ case CPP_WCHAR:
+ *value = lex_charconst (tok);
+ break;
+
+ case CPP_STRING:
+ case CPP_WSTRING:
+ if (!c_lex_return_raw_strings)
+ {
+ type = lex_string (tok, value, false);
+ break;
+ }
+ *value = build_string (tok->val.str.len, (char *) tok->val.str.text);
+ break;
+
+ case CPP_PRAGMA:
+ *value = build_int_cst (NULL, tok->val.pragma);
+ break;
+
+ /* APPLE LOCAL begin CW asm blocks */
+ case CPP_MULT:
+ if (inside_iasm_block)
+ {
+ /* Check and replace use of '*' with '.' if '*' is followed by '-'
+ or '+'. This is to allow "b *+8" which is disallwed by darwin's
+ assembler but nevertheless is needed to be compatible with CW tools. */
+ lasttok = tok;
+ ++parse_in->keep_tokens;
+ do
+ tok = cpp_get_token (parse_in);
+ while (tok->type == CPP_PADDING);
+ _cpp_backup_tokens (parse_in, 1);
+ --parse_in->keep_tokens;
+ if (tok->type == CPP_PLUS || tok->type == CPP_MINUS)
+ type = CPP_DOT;
+ tok = lasttok;
+ }
+ *value = NULL_TREE;
+ break;
+ /* APPLE LOCAL end CW asm blocks */
+ /* APPLE LOCAL begin 4137741 */
+ /* For CPP_BINCL and CPP_EINCL tokens, we shall need to propagate
+ line number information; the location field shall already include
+ the desired file name. */
+ case CPP_BINCL:
+ case CPP_EINCL:
+ *value = build_int_cst (integer_type_node, (HOST_WIDE_INT) tok->src_loc);
+ break;
+
+ /* APPLE LOCAL end 4137741 */
+ /* These tokens should not be visible outside cpplib. */
+ case CPP_HEADER_NAME:
+ case CPP_COMMENT:
+ case CPP_MACRO_ARG:
+ gcc_unreachable ();
+
+ default:
+ *value = NULL_TREE;
+ break;
+ }
+
+ if (cpp_flags)
+ *cpp_flags = tok->flags | add_flags;
+
+ /* APPLE LOCAL begin CW asm blocks */
+ if (flag_iasm_blocks_local)
+ --c_lex_depth;
+ /* APPLE LOCAL end CW asm blocks */
+
+ /* APPLE LOCAL begin 4137741 */
+ if (!no_more_pch
+ && type != CPP_BINCL
+ && type != CPP_EINCL
+ /* APPLE LOCAL begin distcc pch 7216809 */
+ && type != CPP_PRAGMA
+ && type != CPP_STRING
+ && type != CPP_PRAGMA_EOL)
+ /* APPLE LOCAL end distcc pch 7216809 */
+ /* APPLE LOCAL end 4137741 */
+ {
+ no_more_pch = true;
+ c_common_no_more_pch ();
+ }
+
+ timevar_pop (TV_CPP);
+
+ return type;
+}
+
+/* Returns the narrowest C-visible unsigned type, starting with the
+ minimum specified by FLAGS, that can fit HIGH:LOW, or itk_none if
+ there isn't one. */
+
+static enum integer_type_kind
+narrowest_unsigned_type (unsigned HOST_WIDE_INT low,
+ unsigned HOST_WIDE_INT high,
+ unsigned int flags)
+{
+ enum integer_type_kind itk;
+
+ 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;
+
+ for (; itk < itk_none; itk += 2 /* skip unsigned types */)
+ {
+ tree upper = TYPE_MAX_VALUE (integer_types[itk]);
+
+ if ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) > high
+ || ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) == high
+ && TREE_INT_CST_LOW (upper) >= low))
+ return itk;
+ }
+
+ return itk_none;
+}
+
+/* Ditto, but narrowest signed type. */
+static enum integer_type_kind
+narrowest_signed_type (unsigned HOST_WIDE_INT low,
+ unsigned HOST_WIDE_INT high, unsigned int flags)
+{
+ enum integer_type_kind itk;
+
+ 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;
+
+
+ for (; itk < itk_none; itk += 2 /* skip signed types */)
+ {
+ tree upper = TYPE_MAX_VALUE (integer_types[itk]);
+
+ if ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) > high
+ || ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) == high
+ && TREE_INT_CST_LOW (upper) >= low))
+ return itk;
+ }
+
+ return itk_none;
+}
+
+/* Interpret TOKEN, an integer with FLAGS as classified by cpplib. */
+static tree
+interpret_integer (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);
+
+ /* The type of a constant with a U suffix is straightforward. */
+ if (flags & CPP_N_UNSIGNED)
+ itk = narrowest_unsigned_type (integer.low, integer.high, flags);
+ else
+ {
+ /* 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 (integer.low, integer.high, flags);
+ enum integer_type_kind itk_s
+ = narrowest_signed_type (integer.low, integer.high, 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
+ {
+ /* 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)
+ {
+ if (!flag_isoc99)
+ {
+ if (itk_u < itk_unsigned_long)
+ itk_u = itk_unsigned_long;
+ itk = itk_u;
+ warning (0, "this decimal constant is unsigned only in ISO C90");
+ }
+ else
+ warning (OPT_Wtraditional,
+ "this decimal constant would be unsigned in ISO C90");
+ }
+ }
+ }
+
+ 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];
+
+ if (itk > itk_unsigned_long
+ && (flags & CPP_N_WIDTH) != CPP_N_LARGE
+ && !in_system_header && !flag_isoc99)
+ pedwarn ("integer constant is too large for %qs type",
+ (flags & CPP_N_UNSIGNED) ? "unsigned long" : "long");
+
+ value = build_int_cst_wide (type, integer.low, integer.high);
+
+ /* Convert imaginary to a complex type. */
+ if (flags & CPP_N_IMAGINARY)
+ value = build_complex (NULL_TREE, build_int_cst (type, 0), value);
+
+ return value;
+}
+
+/* Interpret TOKEN, a floating point number with FLAGS as classified
+ by cpplib. */
+static tree
+interpret_float (const cpp_token *token, unsigned int flags)
+{
+ tree type;
+ tree value;
+ REAL_VALUE_TYPE real;
+ char *copy;
+ size_t copylen;
+
+ /* Decode type based on width and properties. */
+ if (flags & CPP_N_DFLOAT)
+ if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
+ type = dfloat128_type_node;
+ else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
+ type = dfloat32_type_node;
+ else
+ type = dfloat64_type_node;
+ else
+ if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
+ type = long_double_type_node;
+ else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL
+ || flag_single_precision_constant)
+ type = float_type_node;
+ else
+ type = double_type_node;
+
+ /* 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_DFLOAT)
+ copylen -= 2;
+ else
+ {
+ 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 = (char *) alloca (copylen + 1);
+ memcpy (copy, token->val.str.text, copylen);
+ copy[copylen] = '\0';
+
+ real_from_string3 (&real, copy, TYPE_MODE (type));
+
+ /* Both C and C++ require a diagnostic for a floating constant
+ outside the range of representable values of its type. Since we
+ have __builtin_inf* to produce an infinity, it might now be
+ appropriate for this to be a mandatory pedwarn rather than
+ conditioned on -pedantic. */
+ if (REAL_VALUE_ISINF (real) && pedantic)
+ pedwarn ("floating constant exceeds range of %qT", type);
+
+ /* 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;
+}
+
+/* Convert a series of STRING and/or WSTRING tokens into a tree,
+ performing string constant concatenation. TOK is the first of
+ these. VALP is the location to write the string into. OBJC_STRING
+ indicates whether an '@' token preceded the incoming token.
+ Returns the CPP token type of the result (CPP_STRING, CPP_WSTRING,
+ or CPP_OBJC_STRING).
+
+ This is unfortunately more work than it should be. If any of the
+ strings in the series has an L prefix, the result is a wide string
+ (6.4.5p4). Whether or not the result is a wide string affects the
+ meaning of octal and hexadecimal escapes (6.4.4.4p6,9). But escape
+ sequences do not continue across the boundary between two strings in
+ a series (6.4.5p7), so we must not lose the boundaries. Therefore
+ cpp_interpret_string takes a vector of cpp_string structures, which
+ we must arrange to provide. */
+
+static enum cpp_ttype
+lex_string (const cpp_token *tok, tree *valp, bool objc_string)
+{
+ tree value;
+ bool wide = false;
+ size_t concats = 0;
+ /* APPLE LOCAL pascal strings */
+ bool pascal_p = false;
+ struct obstack str_ob;
+ cpp_string istr;
+
+ /* Try to avoid the overhead of creating and destroying an obstack
+ for the common case of just one string. */
+ cpp_string str = tok->val.str;
+ cpp_string *strs = &str;
+
+ if (tok->type == CPP_WSTRING)
+ wide = true;
+ /* APPLE LOCAL begin pascal strings */
+ if (CPP_OPTION (parse_in, pascal_strings))
+ {
+ if (wide && str.text[0] == 'L' && str.text[2] == '\\' && str.text[3] == 'p')
+ pascal_p = true;
+ else if (str.text[1] == '\\' && str.text[2] == 'p')
+ pascal_p = true;
+ }
+ /* APPLE LOCAL end pascal strings */
+
+ retry:
+ tok = cpp_get_token (parse_in);
+ switch (tok->type)
+ {
+ case CPP_PADDING:
+ goto retry;
+ case CPP_ATSIGN:
+ if (c_dialect_objc ())
+ {
+ objc_string = true;
+ goto retry;
+ }
+ /* FALLTHROUGH */
+
+ default:
+ break;
+
+ case CPP_WSTRING:
+ wide = true;
+ /* FALLTHROUGH */
+
+ case CPP_STRING:
+ if (!concats)
+ {
+ gcc_obstack_init (&str_ob);
+ obstack_grow (&str_ob, &str, sizeof (cpp_string));
+ }
+
+ concats++;
+ obstack_grow (&str_ob, &tok->val.str, sizeof (cpp_string));
+ goto retry;
+ }
+
+ /* We have read one more token than we want. */
+ _cpp_backup_tokens (parse_in, 1);
+ if (concats)
+ strs = XOBFINISH (&str_ob, cpp_string *);
+
+ /* APPLE LOCAL begin pascal strings */
+ if (objc_string)
+ pascal_p = false;
+ /* APPLE LOCAL end pascal strings */
+
+ if (concats && !objc_string && !in_system_header)
+ warning (OPT_Wtraditional,
+ "traditional C rejects string constant concatenation");
+
+ if ((c_lex_string_translate
+ ? cpp_interpret_string : cpp_interpret_string_notranslate)
+ /* APPLE LOCAL pascal strings */
+ (parse_in, strs, concats + 1, &istr, wide, pascal_p))
+ {
+ value = build_string (istr.len, (char *) istr.text);
+ free ((void *) istr.text);
+
+ if (c_lex_string_translate == -1)
+ {
+ int xlated = cpp_interpret_string_notranslate (parse_in, strs,
+ concats + 1,
+ /* APPLE LOCAL pascal strings */
+ &istr, wide, false);
+ /* Assume that, if we managed to translate the string above,
+ then the untranslated parsing will always succeed. */
+ gcc_assert (xlated);
+
+ if (TREE_STRING_LENGTH (value) != (int) istr.len
+ || 0 != strncmp (TREE_STRING_POINTER (value), (char *) istr.text,
+ istr.len))
+ {
+ /* Arrange for us to return the untranslated string in
+ *valp, but to set up the C type of the translated
+ one. */
+ *valp = build_string (istr.len, (char *) istr.text);
+ valp = &TREE_CHAIN (*valp);
+ }
+ free ((void *) istr.text);
+ }
+ }
+ else
+ {
+ /* Callers cannot generally handle error_mark_node in this context,
+ so return the empty string instead. cpp_interpret_string has
+ issued an error. */
+ if (wide)
+ value = build_string (TYPE_PRECISION (wchar_type_node)
+ / TYPE_PRECISION (char_type_node),
+ "\0\0\0"); /* widest supported wchar_t
+ is 32 bits */
+ else
+ value = build_string (1, "");
+ }
+
+ /* APPLE LOCAL begin pascal strings */
+ TREE_TYPE (value) = wide ? wchar_array_type_node
+ : pascal_p ? pascal_string_type_node
+ : char_array_type_node;
+ /* APPLE LOCAL end pascal strings */
+ *valp = fix_string_type (value);
+
+ if (concats)
+ obstack_free (&str_ob, 0);
+
+ return objc_string ? CPP_OBJC_STRING : wide ? CPP_WSTRING : CPP_STRING;
+}
+
+/* Converts a (possibly wide) character constant token into a tree. */
+static tree
+lex_charconst (const cpp_token *token)
+{
+ cppchar_t result;
+ tree type, value;
+ unsigned int chars_seen;
+ int unsignedp;
+
+ result = cpp_interpret_charconst (parse_in, token,
+ &chars_seen, &unsignedp);
+
+ 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_dialect_cxx () || chars_seen > 1)
+ type = integer_type_node;
+ else
+ type = char_type_node;
+
+ /* Cast to cppchar_signed_t to get correct sign-extension of RESULT
+ before possibly widening to HOST_WIDE_INT for build_int_cst. */
+ if (unsignedp || (cppchar_signed_t) result >= 0)
+ value = build_int_cst_wide (type, result, 0);
+ else
+ value = build_int_cst_wide (type, (cppchar_signed_t) result, -1);
+
+ return value;
+}