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Add chibicc

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This program popped up on Hacker News recently. It's the only modern
compiler I've ever seen that doesn't have dependencies and is easily
modified. So I added all of the missing GNU extensions I like to use
which means it might be possible soon to build on non-Linux and have
third party not vendor gcc binaries.
This commit is contained in:
Justine Tunney 2020-12-05 12:20:41 -08:00
parent e44a0cf6f8
commit 8da931a7f6
298 changed files with 19493 additions and 11950 deletions
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19
libc/calls/fileexists.c
View file

@ -18,6 +18,7 @@
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/struct/stat.h"
#include "libc/dce.h"
#include "libc/errno.h"
@ -33,12 +34,18 @@
* function. The stat() function may be used to differentiate them.
*/
bool fileexists(const char *path) {
/* TODO(jart): Use fast path on NT? */
int rc, olderr;
struct stat st;
int olderr = errno;
int rc = stat(path, &st);
if (rc == -1 && (errno == ENOENT || errno == ENOTDIR)) {
errno = olderr;
uint16_t path16[PATH_MAX];
if (!IsWindows()) {
olderr = errno;
rc = stat(path, &st);
if (rc == -1 && (errno == ENOENT || errno == ENOTDIR)) {
errno = olderr;
}
return rc != -1;
} else {
if (__mkntpath(path, path16) == -1) return -1;
return GetFileAttributes(path16) != -1u;
}
return rc != -1;
}