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cppfiles.c (open_include_file): New function.

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* cppfiles.c (open_include_file): New function.
	(find_include_file, cpp_read_file): Use it.

From-SVN: r32568
This commit is contained in:
Zack Weinberg 2000-03-15 22:03:37 +00:00 committed by Zack Weinberg
parent 878885b411
commit e576beb079
2 changed files with 34 additions and 13 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2000-03-15 Zack Weinberg <zack@wolery.cumb.org>
* cppfiles.c (open_include_file): New function.
(find_include_file, cpp_read_file): Use it.
2000-03-15 Jason Merrill <jason@casey.cygnus.com>
* cpphash.c (dump_hash_helper): Take the slot, not the element.

42
gcc/cppfiles.c
View File

@ -48,7 +48,7 @@ static int find_include_file PARAMS ((cpp_reader *, const char *,
struct file_name_list *,
IHASH **, int *));
static int read_include_file PARAMS ((cpp_reader *, int, IHASH *));
static inline int open_include_file PARAMS ((cpp_reader *, const char *));
#if 0
static void hack_vms_include_specification PARAMS ((char *));
@ -61,13 +61,6 @@ static void hack_vms_include_specification PARAMS ((char *));
#define INCLUDE_LEN_FUDGE 0
#endif
/* Open files in nonblocking mode, so we don't get stuck if someone
clever has asked cpp to process /dev/rmt0. read_include_file
will check that we have a real file to work with. Also take care
not to acquire a controlling terminal by mistake (this can't happen
on sane systems, but paranoia is a virtue). */
#define OMODES O_RDONLY|O_NONBLOCK|O_NOCTTY
/* Calculate hash of an IHASH entry. */
static unsigned int
hash_IHASH (x)
@ -182,6 +175,29 @@ file_cleanup (pbuf, pfile)
return 0;
}
/* Centralize calls to open(2) here. This provides a hook for future
changes which might, e.g. look for and open a precompiled version
of the header. It also means all the magic currently associated
with calling open is in one place, and if we ever need more, it'll
be in one place too.
Open files in nonblocking mode, so we don't get stuck if someone
clever has asked cpp to process /dev/rmt0. read_include_file
will check that we have a real file to work with. Also take care
not to acquire a controlling terminal by mistake (this can't happen
on sane systems, but paranoia is a virtue).
Use the three-argument form of open even though we aren't
specifying O_CREAT, to defend against broken system headers. */
static inline int
open_include_file (pfile, filename)
cpp_reader *pfile ATTRIBUTE_UNUSED;
const char *filename;
{
return open (filename, O_RDONLY|O_NONBLOCK|O_NOCTTY, 0666);
}
/* Search for include file FNAME in the include chain starting at
SEARCH_START. Return -2 if this file doesn't need to be included
(because it was included already and it's marked idempotent),
@ -216,13 +232,13 @@ find_include_file (pfile, fname, search_start, ihash, before)
*before = 1;
*ihash = ih;
return open (ih->name, OMODES);
return open_include_file (pfile, ih->name);
}
if (path == ABSOLUTE_PATH)
{
name = (char *) fname;
f = open (name, OMODES);
f = open_include_file (pfile, name);
}
else
{
@ -238,7 +254,7 @@ find_include_file (pfile, fname, search_start, ihash, before)
if (CPP_OPTIONS (pfile)->remap)
name = remap_filename (pfile, name, path);
f = open (name, OMODES);
f = open_include_file (pfile, name);
#ifdef EACCES
if (f == -1 && errno == EACCES)
{
@ -629,7 +645,7 @@ cpp_read_file (pfile, fname)
if (*fname == '\0')
f = 0;
else
f = open (fname, OMODES);
f = open_include_file (pfile, fname);
return read_include_file (pfile, f, ih);
}
@ -1193,7 +1209,7 @@ hack_vms_include_specification (fullname)
if (check_filename_before_returning)
{
f = open (fullname, OMODES);
f = open (fullname, O_RDONLY|O_NONBLOCK);
if (f >= 0)
{
/* The file name is OK as it is, so return it as is. */