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-rw-r--r--compat/win32/dirent.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/compat/win32/dirent.c b/compat/win32/dirent.c
new file mode 100644
index 0000000..52420ec
--- /dev/null
+++ b/compat/win32/dirent.c
@@ -0,0 +1,92 @@
+#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_DATAW *fdata)
+{
+ /* convert UTF-16 name to UTF-8 */
+ xwcstoutf(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)
+{
+ wchar_t pattern[MAX_PATH + 2]; /* + 2 for '/' '*' */
+ WIN32_FIND_DATAW fdata;
+ HANDLE h;
+ int len;
+ DIR *dir;
+
+ /* convert name to UTF-16 and check length < MAX_PATH */
+ if ((len = xutftowcs_path(pattern, name)) < 0)
+ return NULL;
+
+ /* append optional '/' and wildcard '*' */
+ if (len && !is_dir_sep(pattern[len - 1]))
+ pattern[len++] = '/';
+ pattern[len++] = '*';
+ pattern[len] = 0;
+
+ /* open find handle */
+ h = FindFirstFileW(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_DATAW fdata;
+ if (FindNextFileW(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;
+}