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-rw-r--r--libcpp/init.c914
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diff --git a/libcpp/init.c b/libcpp/init.c
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--- a/libcpp/init.c
+++ /dev/null
@@ -1,914 +0,0 @@
-/* CPP Library.
- Copyright (C) 1986-2022 Free Software Foundation, Inc.
- Contributed by Per Bothner, 1994-95.
- Based on CCCP program by Paul Rubin, June 1986
- Adapted to ANSI C, Richard Stallman, Jan 1987
-
-This program 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 3, or (at your option) any
-later version.
-
-This program 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 this program; see the file COPYING3. If not see
-<http://www.gnu.org/licenses/>. */
-
-#include "config.h"
-#include "system.h"
-#include "cpplib.h"
-#include "internal.h"
-#include "mkdeps.h"
-#include "localedir.h"
-#include "filenames.h"
-
-#ifndef ENABLE_CANONICAL_SYSTEM_HEADERS
-#ifdef HAVE_DOS_BASED_FILE_SYSTEM
-#define ENABLE_CANONICAL_SYSTEM_HEADERS 1
-#else
-#define ENABLE_CANONICAL_SYSTEM_HEADERS 0
-#endif
-#endif
-
-static void init_library (void);
-static void mark_named_operators (cpp_reader *, int);
-static bool read_original_filename (cpp_reader *);
-static void read_original_directory (cpp_reader *);
-static void post_options (cpp_reader *);
-
-/* If we have designated initializers (GCC >2.7) these tables can be
- initialized, constant data. Otherwise, they have to be filled in at
- runtime. */
-#if HAVE_DESIGNATED_INITIALIZERS
-
-#define init_trigraph_map() /* Nothing. */
-#define TRIGRAPH_MAP \
-__extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = {
-
-#define END };
-#define s(p, v) [p] = v,
-
-#else
-
-#define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \
- static void init_trigraph_map (void) { \
- unsigned char *x = _cpp_trigraph_map;
-
-#define END }
-#define s(p, v) x[p] = v;
-
-#endif
-
-TRIGRAPH_MAP
- s('=', '#') s(')', ']') s('!', '|')
- s('(', '[') s('\'', '^') s('>', '}')
- s('/', '\\') s('<', '{') s('-', '~')
-END
-
-#undef s
-#undef END
-#undef TRIGRAPH_MAP
-
-/* A set of booleans indicating what CPP features each source language
- requires. */
-struct lang_flags
-{
- char c99;
- char cplusplus;
- char extended_numbers;
- char extended_identifiers;
- char c11_identifiers;
- char std;
- char digraphs;
- char uliterals;
- char rliterals;
- char user_literals;
- char binary_constants;
- char digit_separators;
- char trigraphs;
- char utf8_char_literals;
- char va_opt;
- char scope;
- char dfp_constants;
- char size_t_literals;
- char elifdef;
-};
-
-static const struct lang_flags lang_defaults[] =
-{ /* c99 c++ xnum xid c11 std digr ulit rlit udlit bincst digsep trig u8chlit vaopt scope dfp szlit elifdef */
- /* GNUC89 */ { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 },
- /* GNUC99 */ { 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 },
- /* GNUC11 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 },
- /* GNUC17 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 },
- /* GNUC2X */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1 },
- /* STDC89 */ { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
- /* STDC94 */ { 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
- /* STDC99 */ { 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
- /* STDC11 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
- /* STDC17 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
- /* STDC2X */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1 },
- /* GNUCXX */ { 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 },
- /* CXX98 */ { 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0 },
- /* GNUCXX11 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0 },
- /* CXX11 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0 },
- /* GNUCXX14 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0 },
- /* CXX14 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0 },
- /* GNUCXX17 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0 },
- /* CXX17 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0 },
- /* GNUCXX20 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0 },
- /* CXX20 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0 },
- /* GNUCXX23 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1 },
- /* CXX23 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1 },
- /* ASM */ { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
-};
-
-/* Sets internal flags correctly for a given language. */
-void
-cpp_set_lang (cpp_reader *pfile, enum c_lang lang)
-{
- const struct lang_flags *l = &lang_defaults[(int) lang];
-
- CPP_OPTION (pfile, lang) = lang;
-
- CPP_OPTION (pfile, c99) = l->c99;
- CPP_OPTION (pfile, cplusplus) = l->cplusplus;
- CPP_OPTION (pfile, extended_numbers) = l->extended_numbers;
- CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers;
- CPP_OPTION (pfile, c11_identifiers) = l->c11_identifiers;
- CPP_OPTION (pfile, std) = l->std;
- CPP_OPTION (pfile, digraphs) = l->digraphs;
- CPP_OPTION (pfile, uliterals) = l->uliterals;
- CPP_OPTION (pfile, rliterals) = l->rliterals;
- CPP_OPTION (pfile, user_literals) = l->user_literals;
- CPP_OPTION (pfile, binary_constants) = l->binary_constants;
- CPP_OPTION (pfile, digit_separators) = l->digit_separators;
- CPP_OPTION (pfile, trigraphs) = l->trigraphs;
- CPP_OPTION (pfile, utf8_char_literals) = l->utf8_char_literals;
- CPP_OPTION (pfile, va_opt) = l->va_opt;
- CPP_OPTION (pfile, scope) = l->scope;
- CPP_OPTION (pfile, dfp_constants) = l->dfp_constants;
- CPP_OPTION (pfile, size_t_literals) = l->size_t_literals;
- CPP_OPTION (pfile, elifdef) = l->elifdef;
-}
-
-/* Initialize library global state. */
-static void
-init_library (void)
-{
- static int initialized = 0;
-
- if (! initialized)
- {
- initialized = 1;
-
- _cpp_init_lexer ();
-
- /* Set up the trigraph map. This doesn't need to do anything if
- we were compiled with a compiler that supports C99 designated
- initializers. */
- init_trigraph_map ();
-
-#ifdef ENABLE_NLS
- (void) bindtextdomain (PACKAGE, LOCALEDIR);
-#endif
- }
-}
-
-/* Initialize a cpp_reader structure. */
-cpp_reader *
-cpp_create_reader (enum c_lang lang, cpp_hash_table *table,
- class line_maps *line_table)
-{
- cpp_reader *pfile;
-
- /* Initialize this instance of the library if it hasn't been already. */
- init_library ();
-
- pfile = XCNEW (cpp_reader);
- memset (&pfile->base_context, 0, sizeof (pfile->base_context));
-
- cpp_set_lang (pfile, lang);
- CPP_OPTION (pfile, warn_multichar) = 1;
- CPP_OPTION (pfile, discard_comments) = 1;
- CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1;
- CPP_OPTION (pfile, max_include_depth) = 200;
- CPP_OPTION (pfile, operator_names) = 1;
- CPP_OPTION (pfile, warn_trigraphs) = 2;
- CPP_OPTION (pfile, warn_endif_labels) = 1;
- CPP_OPTION (pfile, cpp_warn_c90_c99_compat) = -1;
- CPP_OPTION (pfile, cpp_warn_c11_c2x_compat) = -1;
- CPP_OPTION (pfile, cpp_warn_cxx11_compat) = 0;
- CPP_OPTION (pfile, cpp_warn_deprecated) = 1;
- CPP_OPTION (pfile, cpp_warn_long_long) = 0;
- CPP_OPTION (pfile, dollars_in_ident) = 1;
- CPP_OPTION (pfile, warn_dollars) = 1;
- CPP_OPTION (pfile, warn_variadic_macros) = 1;
- CPP_OPTION (pfile, warn_builtin_macro_redefined) = 1;
- CPP_OPTION (pfile, cpp_warn_implicit_fallthrough) = 0;
- /* By default, track locations of tokens resulting from macro
- expansion. The '2' means, track the locations with the highest
- accuracy. Read the comments for struct
- cpp_options::track_macro_expansion to learn about the other
- values. */
- CPP_OPTION (pfile, track_macro_expansion) = 2;
- CPP_OPTION (pfile, warn_normalize) = normalized_C;
- CPP_OPTION (pfile, warn_literal_suffix) = 1;
- CPP_OPTION (pfile, canonical_system_headers)
- = ENABLE_CANONICAL_SYSTEM_HEADERS;
- CPP_OPTION (pfile, ext_numeric_literals) = 1;
- CPP_OPTION (pfile, warn_date_time) = 0;
- CPP_OPTION (pfile, cpp_warn_bidirectional) = bidirectional_unpaired;
-
- /* Default CPP arithmetic to something sensible for the host for the
- benefit of dumb users like fix-header. */
- CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long);
- CPP_OPTION (pfile, char_precision) = CHAR_BIT;
- CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int);
- CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int);
- CPP_OPTION (pfile, unsigned_char) = 0;
- CPP_OPTION (pfile, unsigned_wchar) = 1;
- CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */
-
- /* Default to no charset conversion. */
- CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding ();
- CPP_OPTION (pfile, wide_charset) = 0;
-
- /* Default the input character set to UTF-8. */
- CPP_OPTION (pfile, input_charset) = _cpp_default_encoding ();
-
- /* A fake empty "directory" used as the starting point for files
- looked up without a search path. Name cannot be '/' because we
- don't want to prepend anything at all to filenames using it. All
- other entries are correct zero-initialized. */
- pfile->no_search_path.name = (char *) "";
-
- /* Initialize the line map. */
- pfile->line_table = line_table;
-
- /* Initialize lexer state. */
- pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments);
-
- /* Set up static tokens. */
- pfile->avoid_paste.type = CPP_PADDING;
- pfile->avoid_paste.val.source = NULL;
- pfile->avoid_paste.src_loc = 0;
- pfile->endarg.type = CPP_EOF;
- pfile->endarg.flags = 0;
- pfile->endarg.src_loc = 0;
-
- /* Create a token buffer for the lexer. */
- _cpp_init_tokenrun (&pfile->base_run, 250);
- pfile->cur_run = &pfile->base_run;
- pfile->cur_token = pfile->base_run.base;
-
- /* Initialize the base context. */
- pfile->context = &pfile->base_context;
- pfile->base_context.c.macro = 0;
- pfile->base_context.prev = pfile->base_context.next = 0;
-
- /* Aligned and unaligned storage. */
- pfile->a_buff = _cpp_get_buff (pfile, 0);
- pfile->u_buff = _cpp_get_buff (pfile, 0);
-
- /* Initialize table for push_macro/pop_macro. */
- pfile->pushed_macros = 0;
-
- /* Do not force token locations by default. */
- pfile->forced_token_location = 0;
-
- /* Note the timestamp is unset. */
- pfile->time_stamp = time_t (-1);
- pfile->time_stamp_kind = 0;
-
- /* The expression parser stack. */
- _cpp_expand_op_stack (pfile);
-
- /* Initialize the buffer obstack. */
- obstack_specify_allocation (&pfile->buffer_ob, 0, 0, xmalloc, free);
-
- _cpp_init_files (pfile);
-
- _cpp_init_hashtable (pfile, table);
-
- return pfile;
-}
-
-/* Set the line_table entry in PFILE. This is called after reading a
- PCH file, as the old line_table will be incorrect. */
-void
-cpp_set_line_map (cpp_reader *pfile, class line_maps *line_table)
-{
- pfile->line_table = line_table;
-}
-
-/* Free resources used by PFILE. Accessing PFILE after this function
- returns leads to undefined behavior. Returns the error count. */
-void
-cpp_destroy (cpp_reader *pfile)
-{
- cpp_context *context, *contextn;
- struct def_pragma_macro *pmacro;
- tokenrun *run, *runn;
- int i;
-
- free (pfile->op_stack);
-
- while (CPP_BUFFER (pfile) != NULL)
- _cpp_pop_buffer (pfile);
-
- free (pfile->out.base);
-
- if (pfile->macro_buffer)
- {
- free (pfile->macro_buffer);
- pfile->macro_buffer = NULL;
- pfile->macro_buffer_len = 0;
- }
-
- if (pfile->deps)
- deps_free (pfile->deps);
- obstack_free (&pfile->buffer_ob, 0);
-
- _cpp_destroy_hashtable (pfile);
- _cpp_cleanup_files (pfile);
- _cpp_destroy_iconv (pfile);
-
- _cpp_free_buff (pfile->a_buff);
- _cpp_free_buff (pfile->u_buff);
- _cpp_free_buff (pfile->free_buffs);
-
- for (run = &pfile->base_run; run; run = runn)
- {
- runn = run->next;
- free (run->base);
- if (run != &pfile->base_run)
- free (run);
- }
-
- for (context = pfile->base_context.next; context; context = contextn)
- {
- contextn = context->next;
- free (context);
- }
-
- if (pfile->comments.entries)
- {
- for (i = 0; i < pfile->comments.count; i++)
- free (pfile->comments.entries[i].comment);
-
- free (pfile->comments.entries);
- }
- if (pfile->pushed_macros)
- {
- do
- {
- pmacro = pfile->pushed_macros;
- pfile->pushed_macros = pmacro->next;
- free (pmacro->name);
- free (pmacro);
- }
- while (pfile->pushed_macros);
- }
-
- free (pfile);
-}
-
-/* This structure defines one built-in identifier. A node will be
- entered in the hash table under the name NAME, with value VALUE.
-
- There are two tables of these. builtin_array holds all the
- "builtin" macros: these are handled by builtin_macro() in
- macro.c. Builtin is somewhat of a misnomer -- the property of
- interest is that these macros require special code to compute their
- expansions. The value is a "cpp_builtin_type" enumerator.
-
- operator_array holds the C++ named operators. These are keywords
- which act as aliases for punctuators. In C++, they cannot be
- altered through #define, and #if recognizes them as operators. In
- C, these are not entered into the hash table at all (but see
- <iso646.h>). The value is a token-type enumerator. */
-struct builtin_macro
-{
- const uchar *const name;
- const unsigned short len;
- const unsigned short value;
- const bool always_warn_if_redefined;
-};
-
-#define B(n, t, f) { DSC(n), t, f }
-static const struct builtin_macro builtin_array[] =
-{
- B("__TIMESTAMP__", BT_TIMESTAMP, false),
- B("__TIME__", BT_TIME, false),
- B("__DATE__", BT_DATE, false),
- B("__FILE__", BT_FILE, false),
- B("__FILE_NAME__", BT_FILE_NAME, false),
- B("__BASE_FILE__", BT_BASE_FILE, false),
- B("__LINE__", BT_SPECLINE, true),
- B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true),
- B("__COUNTER__", BT_COUNTER, true),
- /* Make sure to update the list of built-in
- function-like macros in traditional.c:
- fun_like_macro() when adding more following */
- B("__has_attribute", BT_HAS_ATTRIBUTE, true),
- B("__has_c_attribute", BT_HAS_STD_ATTRIBUTE, true),
- B("__has_cpp_attribute", BT_HAS_ATTRIBUTE, true),
- B("__has_builtin", BT_HAS_BUILTIN, true),
- B("__has_include", BT_HAS_INCLUDE, true),
- B("__has_include_next",BT_HAS_INCLUDE_NEXT, true),
- /* Keep builtins not used for -traditional-cpp at the end, and
- update init_builtins() if any more are added. */
- B("_Pragma", BT_PRAGMA, true),
- B("__STDC__", BT_STDC, true),
-};
-#undef B
-
-struct builtin_operator
-{
- const uchar *const name;
- const unsigned short len;
- const unsigned short value;
-};
-
-#define B(n, t) { DSC(n), t }
-static const struct builtin_operator operator_array[] =
-{
- B("and", CPP_AND_AND),
- B("and_eq", CPP_AND_EQ),
- B("bitand", CPP_AND),
- B("bitor", CPP_OR),
- B("compl", CPP_COMPL),
- B("not", CPP_NOT),
- B("not_eq", CPP_NOT_EQ),
- B("or", CPP_OR_OR),
- B("or_eq", CPP_OR_EQ),
- B("xor", CPP_XOR),
- B("xor_eq", CPP_XOR_EQ)
-};
-#undef B
-
-/* Mark the C++ named operators in the hash table. */
-static void
-mark_named_operators (cpp_reader *pfile, int flags)
-{
- const struct builtin_operator *b;
-
- for (b = operator_array;
- b < (operator_array + ARRAY_SIZE (operator_array));
- b++)
- {
- cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
- hp->flags |= flags;
- hp->is_directive = 0;
- hp->directive_index = b->value;
- }
-}
-
-/* Helper function of cpp_type2name. Return the string associated with
- named operator TYPE. */
-const char *
-cpp_named_operator2name (enum cpp_ttype type)
-{
- const struct builtin_operator *b;
-
- for (b = operator_array;
- b < (operator_array + ARRAY_SIZE (operator_array));
- b++)
- {
- if (type == b->value)
- return (const char *) b->name;
- }
-
- return NULL;
-}
-
-void
-cpp_init_special_builtins (cpp_reader *pfile)
-{
- const struct builtin_macro *b;
- size_t n = ARRAY_SIZE (builtin_array);
-
- if (CPP_OPTION (pfile, traditional))
- n -= 2;
- else if (! CPP_OPTION (pfile, stdc_0_in_system_headers)
- || CPP_OPTION (pfile, std))
- n--;
-
- for (b = builtin_array; b < builtin_array + n; b++)
- {
- if ((b->value == BT_HAS_ATTRIBUTE
- || b->value == BT_HAS_STD_ATTRIBUTE
- || b->value == BT_HAS_BUILTIN)
- && (CPP_OPTION (pfile, lang) == CLK_ASM
- || pfile->cb.has_attribute == NULL))
- continue;
- cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
- hp->type = NT_BUILTIN_MACRO;
- if (b->always_warn_if_redefined)
- hp->flags |= NODE_WARN;
- hp->value.builtin = (enum cpp_builtin_type) b->value;
- }
-}
-
-/* Restore macro C to builtin macro definition. */
-
-void
-_cpp_restore_special_builtin (cpp_reader *pfile, struct def_pragma_macro *c)
-{
- size_t len = strlen (c->name);
-
- for (const struct builtin_macro *b = builtin_array;
- b < builtin_array + ARRAY_SIZE (builtin_array); b++)
- if (b->len == len && memcmp (c->name, b->name, len + 1) == 0)
- {
- cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
- hp->type = NT_BUILTIN_MACRO;
- if (b->always_warn_if_redefined)
- hp->flags |= NODE_WARN;
- hp->value.builtin = (enum cpp_builtin_type) b->value;
- }
-}
-
-/* Read the builtins table above and enter them, and language-specific
- macros, into the hash table. HOSTED is true if this is a hosted
- environment. */
-void
-cpp_init_builtins (cpp_reader *pfile, int hosted)
-{
- cpp_init_special_builtins (pfile);
-
- if (!CPP_OPTION (pfile, traditional)
- && (! CPP_OPTION (pfile, stdc_0_in_system_headers)
- || CPP_OPTION (pfile, std)))
- _cpp_define_builtin (pfile, "__STDC__ 1");
-
- if (CPP_OPTION (pfile, cplusplus))
- {
- /* C++23 is not yet a standard. For now, use an invalid
- * year/month, 202100L, which is larger than 202002L. */
- if (CPP_OPTION (pfile, lang) == CLK_CXX23
- || CPP_OPTION (pfile, lang) == CLK_GNUCXX23)
- _cpp_define_builtin (pfile, "__cplusplus 202100L");
- else if (CPP_OPTION (pfile, lang) == CLK_CXX20
- || CPP_OPTION (pfile, lang) == CLK_GNUCXX20)
- _cpp_define_builtin (pfile, "__cplusplus 202002L");
- else if (CPP_OPTION (pfile, lang) == CLK_CXX17
- || CPP_OPTION (pfile, lang) == CLK_GNUCXX17)
- _cpp_define_builtin (pfile, "__cplusplus 201703L");
- else if (CPP_OPTION (pfile, lang) == CLK_CXX14
- || CPP_OPTION (pfile, lang) == CLK_GNUCXX14)
- _cpp_define_builtin (pfile, "__cplusplus 201402L");
- else if (CPP_OPTION (pfile, lang) == CLK_CXX11
- || CPP_OPTION (pfile, lang) == CLK_GNUCXX11)
- _cpp_define_builtin (pfile, "__cplusplus 201103L");
- else
- _cpp_define_builtin (pfile, "__cplusplus 199711L");
- }
- else if (CPP_OPTION (pfile, lang) == CLK_ASM)
- _cpp_define_builtin (pfile, "__ASSEMBLER__ 1");
- else if (CPP_OPTION (pfile, lang) == CLK_STDC94)
- _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L");
- else if (CPP_OPTION (pfile, lang) == CLK_STDC2X
- || CPP_OPTION (pfile, lang) == CLK_GNUC2X)
- _cpp_define_builtin (pfile, "__STDC_VERSION__ 202000L");
- else if (CPP_OPTION (pfile, lang) == CLK_STDC17
- || CPP_OPTION (pfile, lang) == CLK_GNUC17)
- _cpp_define_builtin (pfile, "__STDC_VERSION__ 201710L");
- else if (CPP_OPTION (pfile, lang) == CLK_STDC11
- || CPP_OPTION (pfile, lang) == CLK_GNUC11)
- _cpp_define_builtin (pfile, "__STDC_VERSION__ 201112L");
- else if (CPP_OPTION (pfile, c99))
- _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L");
-
- if (CPP_OPTION (pfile, uliterals)
- && !(CPP_OPTION (pfile, cplusplus)
- && (CPP_OPTION (pfile, lang) == CLK_GNUCXX
- || CPP_OPTION (pfile, lang) == CLK_CXX98)))
- {
- _cpp_define_builtin (pfile, "__STDC_UTF_16__ 1");
- _cpp_define_builtin (pfile, "__STDC_UTF_32__ 1");
- }
-
- if (hosted)
- _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1");
- else
- _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0");
-
- if (CPP_OPTION (pfile, objc))
- _cpp_define_builtin (pfile, "__OBJC__ 1");
-}
-
-/* Sanity-checks are dependent on command-line options, so it is
- called as a subroutine of cpp_read_main_file. */
-#if CHECKING_P
-static void sanity_checks (cpp_reader *);
-static void sanity_checks (cpp_reader *pfile)
-{
- cppchar_t test = 0;
- size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part);
-
- /* Sanity checks for assumptions about CPP arithmetic and target
- type precisions made by cpplib. */
- test--;
- if (test < 1)
- cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type");
-
- if (CPP_OPTION (pfile, precision) > max_precision)
- cpp_error (pfile, CPP_DL_ICE,
- "preprocessor arithmetic has maximum precision of %lu bits;"
- " target requires %lu bits",
- (unsigned long) max_precision,
- (unsigned long) CPP_OPTION (pfile, precision));
-
- if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision))
- cpp_error (pfile, CPP_DL_ICE,
- "CPP arithmetic must be at least as precise as a target int");
-
- if (CPP_OPTION (pfile, char_precision) < 8)
- cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide");
-
- if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision))
- cpp_error (pfile, CPP_DL_ICE,
- "target wchar_t is narrower than target char");
-
- if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision))
- cpp_error (pfile, CPP_DL_ICE,
- "target int is narrower than target char");
-
- /* This is assumed in eval_token() and could be fixed if necessary. */
- if (sizeof (cppchar_t) > sizeof (cpp_num_part))
- cpp_error (pfile, CPP_DL_ICE,
- "CPP half-integer narrower than CPP character");
-
- if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T)
- cpp_error (pfile, CPP_DL_ICE,
- "CPP on this host cannot handle wide character constants over"
- " %lu bits, but the target requires %lu bits",
- (unsigned long) BITS_PER_CPPCHAR_T,
- (unsigned long) CPP_OPTION (pfile, wchar_precision));
-}
-#else
-# define sanity_checks(PFILE)
-#endif
-
-/* This is called after options have been parsed, and partially
- processed. */
-void
-cpp_post_options (cpp_reader *pfile)
-{
- int flags;
-
- sanity_checks (pfile);
-
- post_options (pfile);
-
- /* Mark named operators before handling command line macros. */
- flags = 0;
- if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names))
- flags |= NODE_OPERATOR;
- if (CPP_OPTION (pfile, warn_cxx_operator_names))
- flags |= NODE_DIAGNOSTIC | NODE_WARN_OPERATOR;
- if (flags != 0)
- mark_named_operators (pfile, flags);
-}
-
-/* Setup for processing input from the file named FNAME, or stdin if
- it is the empty string. Return the original filename on success
- (e.g. foo.i->foo.c), or NULL on failure. INJECTING is true if
- there may be injected headers before line 1 of the main file. */
-const char *
-cpp_read_main_file (cpp_reader *pfile, const char *fname, bool injecting)
-{
- if (mkdeps *deps = cpp_get_deps (pfile))
- /* Set the default target (if there is none already). */
- deps_add_default_target (deps, fname);
-
- pfile->main_file
- = _cpp_find_file (pfile, fname,
- CPP_OPTION (pfile, preprocessed) ? &pfile->no_search_path
- : CPP_OPTION (pfile, main_search) == CMS_user
- ? pfile->quote_include
- : CPP_OPTION (pfile, main_search) == CMS_system
- ? pfile->bracket_include : &pfile->no_search_path,
- /*angle=*/0, _cpp_FFK_NORMAL, 0);
-
- if (_cpp_find_failed (pfile->main_file))
- return NULL;
-
- _cpp_stack_file (pfile, pfile->main_file,
- injecting || CPP_OPTION (pfile, preprocessed)
- ? IT_PRE_MAIN : IT_MAIN, 0);
-
- /* For foo.i, read the original filename foo.c now, for the benefit
- of the front ends. */
- if (CPP_OPTION (pfile, preprocessed))
- if (!read_original_filename (pfile))
- {
- /* We're on line 1 after all. */
- auto *last = linemap_check_ordinary
- (LINEMAPS_LAST_MAP (pfile->line_table, false));
- last->to_line = 1;
- /* Inform of as-if a file change. */
- _cpp_do_file_change (pfile, LC_RENAME_VERBATIM, LINEMAP_FILE (last),
- LINEMAP_LINE (last), LINEMAP_SYSP (last));
- }
-
- auto *map = LINEMAPS_LAST_ORDINARY_MAP (pfile->line_table);
- pfile->main_loc = MAP_START_LOCATION (map);
-
- return ORDINARY_MAP_FILE_NAME (map);
-}
-
-location_t
-cpp_main_loc (const cpp_reader *pfile)
-{
- return pfile->main_loc;
-}
-
-/* For preprocessed files, if the very first characters are
- '#<SPACE>[01]<SPACE>', then handle a line directive so we know the
- original file name. This will generate file_change callbacks,
- which the front ends must handle appropriately given their state of
- initialization. We peek directly into the character buffer, so
- that we're not confused by otherwise-skipped white space &
- comments. We can be very picky, because this should have been
- machine-generated text (by us, no less). This way we do not
- interfere with the module directive state machine. */
-
-static bool
-read_original_filename (cpp_reader *pfile)
-{
- auto *buf = pfile->buffer->next_line;
-
- if (pfile->buffer->rlimit - buf > 4
- && buf[0] == '#'
- && buf[1] == ' '
- // Also permit '1', as that's what used to be here
- && (buf[2] == '0' || buf[2] == '1')
- && buf[3] == ' ')
- {
- const cpp_token *token = _cpp_lex_direct (pfile);
- gcc_checking_assert (token->type == CPP_HASH);
- if (_cpp_handle_directive (pfile, token->flags & PREV_WHITE))
- {
- read_original_directory (pfile);
-
- auto *penult = &linemap_check_ordinary
- (LINEMAPS_LAST_MAP (pfile->line_table, false))[-1];
- if (penult[1].reason == LC_RENAME_VERBATIM)
- {
- /* Expunge any evidence of the original linemap. */
- pfile->line_table->highest_location
- = pfile->line_table->highest_line
- = penult[0].start_location;
-
- penult[1].start_location = penult[0].start_location;
- penult[1].reason = penult[0].reason;
- penult[0] = penult[1];
- pfile->line_table->info_ordinary.used--;
- pfile->line_table->info_ordinary.cache = 0;
- }
-
- return true;
- }
- }
-
- return false;
-}
-
-/* For preprocessed files, if the tokens following the first filename
- line is of the form # <line> "/path/name//", handle the
- directive so we know the original current directory.
-
- As with the first line peeking, we can do this without lexing by
- being picky. */
-static void
-read_original_directory (cpp_reader *pfile)
-{
- auto *buf = pfile->buffer->next_line;
-
- if (pfile->buffer->rlimit - buf > 4
- && buf[0] == '#'
- && buf[1] == ' '
- // Also permit '1', as that's what used to be here
- && (buf[2] == '0' || buf[2] == '1')
- && buf[3] == ' ')
- {
- const cpp_token *hash = _cpp_lex_direct (pfile);
- gcc_checking_assert (hash->type == CPP_HASH);
- pfile->state.in_directive = 1;
- const cpp_token *number = _cpp_lex_direct (pfile);
- gcc_checking_assert (number->type == CPP_NUMBER);
- const cpp_token *string = _cpp_lex_direct (pfile);
- pfile->state.in_directive = 0;
-
- const unsigned char *text = nullptr;
- size_t len = 0;
- if (string->type == CPP_STRING)
- {
- /* The string value includes the quotes. */
- text = string->val.str.text;
- len = string->val.str.len;
- }
- if (len < 5
- || !IS_DIR_SEPARATOR (text[len - 2])
- || !IS_DIR_SEPARATOR (text[len - 3]))
- {
- /* That didn't work out, back out. */
- _cpp_backup_tokens (pfile, 3);
- return;
- }
-
- if (pfile->cb.dir_change)
- {
- /* Smash the string directly, it's dead at this point */
- char *smashy = (char *)text;
- smashy[len - 3] = 0;
-
- pfile->cb.dir_change (pfile, smashy + 1);
- }
-
- /* We should be at EOL. */
- }
-}
-
-/* This is called at the end of preprocessing. It pops the last
- buffer and writes dependency output.
-
- Maybe it should also reset state, such that you could call
- cpp_start_read with a new filename to restart processing. */
-void
-cpp_finish (cpp_reader *pfile, FILE *deps_stream)
-{
- /* Warn about unused macros before popping the final buffer. */
- if (CPP_OPTION (pfile, warn_unused_macros))
- cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL);
-
- /* lex.c leaves the final buffer on the stack. This it so that
- it returns an unending stream of CPP_EOFs to the client. If we
- popped the buffer, we'd dereference a NULL buffer pointer and
- segfault. It's nice to allow the client to do worry-free excess
- cpp_get_token calls. */
- while (pfile->buffer)
- _cpp_pop_buffer (pfile);
-
- if (deps_stream)
- deps_write (pfile, deps_stream, 72);
-
- /* Report on headers that could use multiple include guards. */
- if (CPP_OPTION (pfile, print_include_names))
- _cpp_report_missing_guards (pfile);
-}
-
-static void
-post_options (cpp_reader *pfile)
-{
- /* -Wtraditional is not useful in C++ mode. */
- if (CPP_OPTION (pfile, cplusplus))
- CPP_OPTION (pfile, cpp_warn_traditional) = 0;
-
- /* Permanently disable macro expansion if we are rescanning
- preprocessed text. Read preprocesed source in ISO mode. */
- if (CPP_OPTION (pfile, preprocessed))
- {
- if (!CPP_OPTION (pfile, directives_only))
- pfile->state.prevent_expansion = 1;
- CPP_OPTION (pfile, traditional) = 0;
- }
-
- if (CPP_OPTION (pfile, warn_trigraphs) == 2)
- CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs);
-
- if (CPP_OPTION (pfile, traditional))
- {
- CPP_OPTION (pfile, trigraphs) = 0;
- CPP_OPTION (pfile, warn_trigraphs) = 0;
- }
-
- if (CPP_OPTION (pfile, module_directives))
- {
- /* These unspellable tokens have a leading space. */
- const char *const inits[spec_nodes::M_HWM]
- = {"export ", "module ", "import ", "__import"};
-
- for (int ix = 0; ix != spec_nodes::M_HWM; ix++)
- {
- cpp_hashnode *node = cpp_lookup (pfile, UC (inits[ix]),
- strlen (inits[ix]));
-
- /* Token we pass to the compiler. */
- pfile->spec_nodes.n_modules[ix][1] = node;
-
- if (ix != spec_nodes::M__IMPORT)
- /* Token we recognize when lexing, drop the trailing ' '. */
- node = cpp_lookup (pfile, NODE_NAME (node), NODE_LEN (node) - 1);
-
- node->flags |= NODE_MODULE;
- pfile->spec_nodes.n_modules[ix][0] = node;
- }
- }
-}
generated by cgit v1.1 at 2025-05-29 14:36:44 +0000