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re PR preprocessor/15933 (Caching of include files breaks compilation)

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PR 15933
	Partially revert patch of 2004-06-05.
	* files.c (search_cache): Remove pfile argument.  Don't check
	for file that would be found by "" or <> search here...
	(_cpp_find_file): ...do it here, before calling find_file_in_dir.
	Do not apply directory-of-current-file correction to files
	found by this check.  Rearrange code slightly.

From-SVN: r83714
This commit is contained in:
Zack Weinberg 2004-06-26 17:39:40 +00:00 committed by Zack Weinberg
parent ddc9ce9115
commit e83d8d43fe
2 changed files with 31 additions and 41 deletions
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9
libcpp/ChangeLog
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@ -1,3 +1,12 @@
2004-06-26 Zack Weinberg <zack@codesourcery.com>
Partially revert patch of 2004-06-05.
* files.c (search_cache): Remove pfile argument. Don't check
for file that would be found by "" or <> search here...
(_cpp_find_file): ...do it here, before calling find_file_in_dir.
Do not apply directory-of-current-file correction to files
found by this check. Rearrange code slightly.
2004-06-21 Geoffrey Keating <geoffk@apple.com>
* files.c (should_stack_file): Correct swapped parameters to call

57
libcpp/files.c
View File

@ -158,8 +158,7 @@ static struct cpp_dir *search_path_head (cpp_reader *, const char *fname,
int angle_brackets, enum include_type);
static const char *dir_name_of_file (_cpp_file *file);
static void open_file_failed (cpp_reader *pfile, _cpp_file *file);
static struct file_hash_entry *search_cache (cpp_reader *pfile,
struct file_hash_entry *head,
static struct file_hash_entry *search_cache (struct file_hash_entry *head,
const cpp_dir *start_dir);
static _cpp_file *make_cpp_file (cpp_reader *, cpp_dir *, const char *fname);
static cpp_dir *make_cpp_dir (cpp_reader *, const char *dir_name, int sysp);
@ -407,7 +406,7 @@ _cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir, bool f
INSERT);
/* First check the cache before we resort to memory allocation. */
entry = search_cache (pfile, *hash_slot, start_dir);
entry = search_cache (*hash_slot, start_dir);
if (entry)
return entry->u.file;
@ -416,6 +415,21 @@ _cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir, bool f
/* Try each path in the include chain. */
for (; !fake ;)
{
if (file->dir == pfile->quote_include
|| file->dir == pfile->bracket_include)
{
entry = search_cache (*hash_slot, file->dir);
if (entry)
{
/* Found the same file again. Record it as reachable
from this position, too. */
free ((char *) file->name);
free (file);
file = entry->u.file;
goto found;
}
}
if (find_file_in_dir (pfile, file, &invalid_pch))
break;
@ -438,19 +452,9 @@ _cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir, bool f
}
}
if (entry)
{
/* Cache for START_DIR too, sharing the _cpp_file structure. */
free ((char *) file->name);
free (file);
file = entry->u.file;
}
else
{
/* This is a new file; put it in the list. */
file->next_file = pfile->all_files;
pfile->all_files = file;
}
/* If this file was found in the directory-of-the-current-file,
check whether that directory is reachable via one of the normal
@ -479,6 +483,7 @@ _cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir, bool f
start_dir = proper_start_dir;
}
found:
/* Store this new result in the hash table. */
entry = new_file_hash_entry (pfile);
entry->next = *hash_slot;
@ -838,8 +843,7 @@ open_file_failed (cpp_reader *pfile, _cpp_file *file)
/* Search in the chain beginning at HEAD for a file whose search path
started at START_DIR != NULL. */
static struct file_hash_entry *
search_cache (cpp_reader *pfile, struct file_hash_entry *head,
const cpp_dir *start_dir)
search_cache (struct file_hash_entry *head, const cpp_dir *start_dir)
{
struct file_hash_entry *p;
@ -848,29 +852,6 @@ search_cache (cpp_reader *pfile, struct file_hash_entry *head,
for (p = head; p; p = p->next)
if (p->start_dir == start_dir)
return p;
/* If the given location is for a search of the directory containing
the current file, check for a match starting at the base of the
quoted include chain. */
if (start_dir->next == pfile->quote_include)
{
start_dir = pfile->quote_include;
for (p = head; p; p = p->next)
if (p->start_dir == start_dir)
return p;
}
/* If the given location is for a search from the base of the quoted
include chain, check for a match starting at the base of the
bracket include chain. */
if (start_dir == pfile->quote_include)
{
start_dir = pfile->bracket_include;
for (p = head; p; p = p->next)
if (p->start_dir == start_dir)
return p;
}
return 0;
}