lua-osx/dir_win32.c

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2022-12-11 18:58:11 +01:00
// SPDX-License-Identifier: LGPL-3.0-or-later
/* osx_dir.h implementation for Windows.
*
* Copyright: 2022, The DoubleFourteen Code Forge
* Author: Lorenzo Cogotti
*/
#include "xconf.h"
#include "osx_dir.h"
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
DF_OSXLIB_API df_os_dirhn os_opendir(const char *path)
{
if (*path == '\0') { // avoid generating \* search path
errno = ENOENT;
return NULL;
}
char buf[_MAX_PATH + 2 + 1];
int n = snprintf(buf, sizeof(buf), "%s\\*", path);
if (n < 0)
return NULL;
if ((size_t) n >= sizeof(buf)) {
errno = ERANGE;
return NULL;
}
df_os_dirhn hn = malloc(sizeof(*hn));
if (!hn)
return NULL;
hn->dirh = _findfirst(buf, &hn->data);
if (hn->dirh == -1) {
free(hn);
return NULL;
}
hn->startflag = true;
hn->errflag = false;
hn->endflag = false;
return hn;
}
DF_OSXLIB_API char *os_readdir(df_os_dirhn hn)
{
if (hn->startflag) {
// Return first item found by _findfirst()
hn->startflag = false;
return hn->data.name;
}
// Reset status flags and advance directory iterator
hn->errflag = false;
hn->endflag = false;
int err = errno;
if (_findnext(hn->dirh, &hn->data) == -1) {
if (errno == ENOENT) {
// End of directory, this is not an error, restore old errno
errno = err;
hn->endflag = true;
} else {
hn->errflag = true;
}
return NULL;
}
return hn->data.name;
}
DF_OSXLIB_API void os_closedir(df_os_dirhn hn)
{
_findclose(hn->dirh);
free(hn);
}