preprocessor: Replace some flags with a single enum
_cpp_find_file has 3 bool arguments, at most one of which is ever set. Ripe for replacing with a 4-state enum. Also, this is C++, so 'typedef struct Foo Foo' is unnecessary. * internal.h (typedef _cpp_file): Delete, unnecessary in C++. (enum _cpp_find_file_kind): New. (_cpp_find_file): Use it, not 3 bools. * files.c (_cpp_find_file): Use _cpp_find_file_kind enum, not bools. (cpp_make_system_header): Break overly long line. (_cpp_stack_include, _cpp_fake_include) (_cpp_do_file_change, _cpp_compare_file_date, _cpp_has_header): Adjust. * init.c (cpp_read_main): Adjust _cpp_find_file call.
This commit is contained in:
Nathan Sidwell
parent
610ae2dbbf
commit
4623a6f2d0
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@ -1,3 +1,15 @@
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2020-05-20 Nathan Sidwell <nathan@acm.org>
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* internal.h (typedef _cpp_file): Delete, unnecessary in C++.
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(enum _cpp_find_file_kind): New.
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(_cpp_find_file): Use it, not 3 bools.
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* files.c (_cpp_find_file): Use _cpp_find_file_kind enum, not
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bools.
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(cpp_make_system_header): Break overly long line.
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(_cpp_stack_include, _cpp_fake_include)
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(_cpp_do_file_change, _cpp_compare_file_date, _cpp_has_header): Adjust.
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* init.c (cpp_read_main): Adjust _cpp_find_file call.
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2020-05-18 Nathan Sidwell <nathan@acm.org>
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* include/cpplib.h (cpp_get_otions, cpp_get_callbacks)
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@ -496,21 +496,16 @@ _cpp_find_failed (_cpp_file *file)
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had previously been closed. To open it again pass the return value
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to open_file().
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If IMPLICIT_PREINCLUDE then it is OK for the file to be missing.
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If present, it is OK for a precompiled header to be included after
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it.
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If KIND is _cpp_FFK_PRE_INCLUDE then it is OK for the file to be
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missing. If present, it is OK for a precompiled header to be
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included after it.
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Use LOC as the location for any errors. */
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_cpp_file *
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_cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir,
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int angle_brackets,
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bool fake, bool implicit_preinclude, bool has_include,
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location_t loc)
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int angle_brackets, _cpp_find_file_kind kind, location_t loc)
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{
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struct cpp_file_hash_entry *entry;
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void **hash_slot;
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_cpp_file *file;
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bool invalid_pch = false;
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bool saw_bracket_include = false;
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bool saw_quote_include = false;
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@ -520,22 +515,22 @@ _cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir,
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if (start_dir == NULL)
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cpp_error_at (pfile, CPP_DL_ICE, loc, "NULL directory in find_file");
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hash_slot
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void **hash_slot
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= htab_find_slot_with_hash (pfile->file_hash, fname,
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htab_hash_string (fname), INSERT);
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/* First check the cache before we resort to memory allocation. */
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entry = search_cache ((struct cpp_file_hash_entry *) *hash_slot, start_dir);
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cpp_file_hash_entry *entry
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= search_cache ((struct cpp_file_hash_entry *) *hash_slot, start_dir);
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if (entry)
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return entry->u.file;
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file = make_cpp_file (pfile, start_dir, fname);
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_cpp_file *file = make_cpp_file (pfile, start_dir, fname);
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file->implicit_preinclude
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= (implicit_preinclude
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|| (pfile->buffer
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&& pfile->buffer->file->implicit_preinclude));
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= (kind == _cpp_FFK_PRE_INCLUDE
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|| (pfile->buffer && pfile->buffer->file->implicit_preinclude));
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if (!fake)
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if (kind != _cpp_FFK_FAKE)
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/* Try each path in the include chain. */
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for (;;)
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{
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@ -580,7 +575,7 @@ _cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir,
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"use -Winvalid-pch for more information");
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}
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if (implicit_preinclude)
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if (kind == _cpp_FFK_PRE_INCLUDE)
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{
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free ((char *) file->name);
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free (file);
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@ -593,7 +588,7 @@ _cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir,
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return NULL;
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}
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if (!has_include)
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if (kind != _cpp_FFK_HAS_INCLUDE)
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open_file_failed (pfile, file, angle_brackets, loc);
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break;
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}
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@ -1049,7 +1044,8 @@ _cpp_stack_include (cpp_reader *pfile, const char *fname, int angle_brackets,
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return false;
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_cpp_file *file = _cpp_find_file (pfile, fname, dir, angle_brackets,
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false, type == IT_DEFAULT, false, loc);
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type == IT_DEFAULT ? _cpp_FFK_PRE_INCLUDE
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: _cpp_FFK_NORMAL, loc);
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if (type == IT_DEFAULT && file == NULL)
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return false;
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@ -1342,8 +1338,7 @@ cpp_clear_file_cache (cpp_reader *pfile)
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void
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_cpp_fake_include (cpp_reader *pfile, const char *fname)
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{
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_cpp_find_file (pfile, fname, pfile->buffer->file->dir,
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0, true, false, false, 0);
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_cpp_find_file (pfile, fname, pfile->buffer->file->dir, 0, _cpp_FFK_FAKE, 0);
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}
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/* Not everyone who wants to set system-header-ness on a buffer can
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@ -1360,7 +1355,8 @@ cpp_make_system_header (cpp_reader *pfile, int syshdr, int externc)
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flags = 1 + (externc != 0);
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pfile->buffer->sysp = flags;
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_cpp_do_file_change (pfile, LC_RENAME, ORDINARY_MAP_FILE_NAME (map),
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SOURCE_LINE (map, pfile->line_table->highest_line), flags);
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SOURCE_LINE (map, pfile->line_table->highest_line),
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flags);
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}
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/* Allow the client to change the current file. Used by the front end
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@ -1461,8 +1457,7 @@ _cpp_compare_file_date (cpp_reader *pfile, const char *fname,
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if (!dir)
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return -1;
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file = _cpp_find_file (pfile, fname, dir, angle_brackets,
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false, false, false, 0);
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file = _cpp_find_file (pfile, fname, dir, angle_brackets, _cpp_FFK_NORMAL, 0);
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if (file->err_no)
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return -1;
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@ -2006,10 +2001,7 @@ _cpp_has_header (cpp_reader *pfile, const char *fname, int angle_brackets,
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{
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cpp_dir *start_dir = search_path_head (pfile, fname, angle_brackets, type);
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_cpp_file *file = _cpp_find_file (pfile, fname, start_dir, angle_brackets,
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/*fake=*/false,
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/*implicit_preinclude=*/false,
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/*has_include=*/true,
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0);
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_cpp_FFK_HAS_INCLUDE, 0);
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return file->err_no != ENOENT;
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}
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@ -662,8 +662,6 @@ cpp_post_options (cpp_reader *pfile)
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const char *
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cpp_read_main_file (cpp_reader *pfile, const char *fname)
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{
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const location_t loc = 0;
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if (CPP_OPTION (pfile, deps.style) != DEPS_NONE)
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{
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if (!pfile->deps)
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@ -675,8 +673,7 @@ cpp_read_main_file (cpp_reader *pfile, const char *fname)
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pfile->main_file
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= _cpp_find_file (pfile, fname, &pfile->no_search_path, /*angle=*/0,
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/*fake=*/false, /*preinclude=*/false, /*hasinclude=*/false,
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loc);
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_cpp_FFK_NORMAL, 0);
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if (_cpp_find_failed (pfile->main_file))
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return NULL;
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@ -677,10 +677,10 @@ extern void _cpp_init_hashtable (cpp_reader *, cpp_hash_table *);
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extern void _cpp_destroy_hashtable (cpp_reader *);
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/* In files.c */
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typedef struct _cpp_file _cpp_file;
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enum _cpp_find_file_kind
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{ _cpp_FFK_NORMAL, _cpp_FFK_FAKE, _cpp_FFK_PRE_INCLUDE, _cpp_FFK_HAS_INCLUDE };
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extern _cpp_file *_cpp_find_file (cpp_reader *, const char *, cpp_dir *,
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int angle, bool fake, bool preinclude,
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bool has_include, location_t);
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int angle, _cpp_find_file_kind, location_t);
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extern bool _cpp_find_failed (_cpp_file *);
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extern void _cpp_mark_file_once_only (cpp_reader *, struct _cpp_file *);
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extern void _cpp_fake_include (cpp_reader *, const char *);
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