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https://github.com/git/git
synced 2024-11-05 18:59:29 +00:00
0217569bb2
Changes opendir/readdir to use Windows Unicode APIs and convert between UTF-8/UTF-16. Removes parameter checks that are already covered by xutftowcs_path. This changes detection of ENAMETOOLONG from MAX_PATH - 2 to MAX_PATH (matching is_dir_empty in mingw.c). If name + "/*" or the resulting absolute path is too long, FindFirstFile fails and errno is set through err_win_to_posix. Increases the size of dirent.d_name to accommodate the full WIN32_FIND_DATA.cFileName converted to UTF-8 (UTF-16 to UTF-8 conversion may grow by factor three in the worst case). Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Stepan Kasal <kasal@ucw.cz> Signed-off-by: Junio C Hamano <gitster@pobox.com>
92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
#include "../../git-compat-util.h"
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struct DIR {
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struct dirent dd_dir; /* includes d_type */
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HANDLE dd_handle; /* FindFirstFile handle */
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int dd_stat; /* 0-based index */
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};
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static inline void finddata2dirent(struct dirent *ent, WIN32_FIND_DATAW *fdata)
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{
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/* convert UTF-16 name to UTF-8 */
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xwcstoutf(ent->d_name, fdata->cFileName, sizeof(ent->d_name));
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/* Set file type, based on WIN32_FIND_DATA */
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if (fdata->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
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ent->d_type = DT_DIR;
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else
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ent->d_type = DT_REG;
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}
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DIR *opendir(const char *name)
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{
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wchar_t pattern[MAX_PATH + 2]; /* + 2 for '/' '*' */
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WIN32_FIND_DATAW fdata;
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HANDLE h;
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int len;
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DIR *dir;
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/* convert name to UTF-16 and check length < MAX_PATH */
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if ((len = xutftowcs_path(pattern, name)) < 0)
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return NULL;
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/* append optional '/' and wildcard '*' */
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if (len && !is_dir_sep(pattern[len - 1]))
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pattern[len++] = '/';
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pattern[len++] = '*';
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pattern[len] = 0;
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/* open find handle */
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h = FindFirstFileW(pattern, &fdata);
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if (h == INVALID_HANDLE_VALUE) {
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DWORD err = GetLastError();
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errno = (err == ERROR_DIRECTORY) ? ENOTDIR : err_win_to_posix(err);
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return NULL;
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}
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/* initialize DIR structure and copy first dir entry */
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dir = xmalloc(sizeof(DIR));
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dir->dd_handle = h;
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dir->dd_stat = 0;
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finddata2dirent(&dir->dd_dir, &fdata);
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return dir;
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}
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struct dirent *readdir(DIR *dir)
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{
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if (!dir) {
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errno = EBADF; /* No set_errno for mingw */
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return NULL;
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}
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/* if first entry, dirent has already been set up by opendir */
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if (dir->dd_stat) {
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/* get next entry and convert from WIN32_FIND_DATA to dirent */
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WIN32_FIND_DATAW fdata;
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if (FindNextFileW(dir->dd_handle, &fdata)) {
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finddata2dirent(&dir->dd_dir, &fdata);
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} else {
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DWORD lasterr = GetLastError();
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/* POSIX says you shouldn't set errno when readdir can't
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find any more files; so, if another error we leave it set. */
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if (lasterr != ERROR_NO_MORE_FILES)
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errno = err_win_to_posix(lasterr);
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return NULL;
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}
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}
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++dir->dd_stat;
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return &dir->dd_dir;
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}
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int closedir(DIR *dir)
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{
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if (!dir) {
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errno = EBADF;
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return -1;
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}
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FindClose(dir->dd_handle);
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free(dir);
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return 0;
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}
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