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#include "../../git-compat-util.h"
struct DIR {
struct dirent dd_dir; /* includes d_type */
HANDLE dd_handle; /* FindFirstFile handle */
int dd_stat; /* 0-based index */
};
static inline void finddata2dirent(struct dirent *ent, WIN32_FIND_DATAA *fdata)
{
/* copy file name from WIN32_FIND_DATA to dirent */
memcpy(ent->d_name, fdata->cFileName, sizeof(ent->d_name));
/* Set file type, based on WIN32_FIND_DATA */
if (fdata->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
ent->d_type = DT_DIR;
else
ent->d_type = DT_REG;
}
DIR *opendir(const char *name)
{
char pattern[MAX_PATH];
WIN32_FIND_DATAA fdata;
HANDLE h;
int len;
DIR *dir;
/* check that name is not NULL */
if (!name) {
errno = EINVAL;
return NULL;
}
/* check that the pattern won't be too long for FindFirstFileA */
len = strlen(name);
if (len + 2 >= MAX_PATH) {
errno = ENAMETOOLONG;
return NULL;
}
/* copy name to temp buffer */
memcpy(pattern, name, len + 1);
/* append optional '/' and wildcard '*' */
if (len && !is_dir_sep(pattern[len - 1]))
pattern[len++] = '/';
pattern[len++] = '*';
pattern[len] = 0;
/* open find handle */
h = FindFirstFileA(pattern, &fdata);
if (h == INVALID_HANDLE_VALUE) {
DWORD err = GetLastError();
errno = (err == ERROR_DIRECTORY) ? ENOTDIR : err_win_to_posix(err);
return NULL;
}
/* initialize DIR structure and copy first dir entry */
dir = xmalloc(sizeof(DIR));
dir->dd_handle = h;
dir->dd_stat = 0;
finddata2dirent(&dir->dd_dir, &fdata);
return dir;
}
struct dirent *readdir(DIR *dir)
{
if (!dir) {
errno = EBADF; /* No set_errno for mingw */
return NULL;
}
/* if first entry, dirent has already been set up by opendir */
if (dir->dd_stat) {
/* get next entry and convert from WIN32_FIND_DATA to dirent */
WIN32_FIND_DATAA fdata;
if (FindNextFileA(dir->dd_handle, &fdata)) {
finddata2dirent(&dir->dd_dir, &fdata);
} else {
DWORD lasterr = GetLastError();
/* POSIX says you shouldn't set errno when readdir can't
find any more files; so, if another error we leave it set. */
if (lasterr != ERROR_NO_MORE_FILES)
errno = err_win_to_posix(lasterr);
return NULL;
}
}
++dir->dd_stat;
return &dir->dd_dir;
}
int closedir(DIR *dir)
{
if (!dir) {
errno = EBADF;
return -1;
}
FindClose(dir->dd_handle);
free(dir);
return 0;
}
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