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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 */
char dd_name[1]; /* extend struct */
};
DIR *opendir(const char *name)
{
DWORD attrs = GetFileAttributesA(name);
int len;
DIR *p;
/* check for valid path */
if (attrs == INVALID_FILE_ATTRIBUTES) {
errno = ENOENT;
return NULL;
}
/* check if it's a directory */
if (!(attrs & FILE_ATTRIBUTE_DIRECTORY)) {
errno = ENOTDIR;
return NULL;
}
/* check that the pattern won't be too long for FindFirstFileA */
len = strlen(name);
if (is_dir_sep(name[len - 1]))
len--;
if (len + 2 >= MAX_PATH) {
errno = ENAMETOOLONG;
return NULL;
}
p = malloc(sizeof(DIR) + len + 2);
if (!p)
return NULL;
memset(p, 0, sizeof(DIR) + len + 2);
strcpy(p->dd_name, name);
p->dd_name[len] = '/';
p->dd_name[len+1] = '*';
p->dd_handle = INVALID_HANDLE_VALUE;
return p;
}
struct dirent *readdir(DIR *dir)
{
WIN32_FIND_DATAA buf;
HANDLE handle;
if (!dir || !dir->dd_handle) {
errno = EBADF; /* No set_errno for mingw */
return NULL;
}
if (dir->dd_handle == INVALID_HANDLE_VALUE && dir->dd_stat == 0) {
DWORD lasterr;
handle = FindFirstFileA(dir->dd_name, &buf);
lasterr = GetLastError();
dir->dd_handle = handle;
if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
errno = err_win_to_posix(lasterr);
return NULL;
}
} else if (dir->dd_handle == INVALID_HANDLE_VALUE) {
return NULL;
} else if (!FindNextFileA(dir->dd_handle, &buf)) {
DWORD lasterr = GetLastError();
FindClose(dir->dd_handle);
dir->dd_handle = INVALID_HANDLE_VALUE;
/* 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;
}
/* We get here if `buf' contains valid data. */
strcpy(dir->dd_dir.d_name, buf.cFileName);
++dir->dd_stat;
/* Set file type, based on WIN32_FIND_DATA */
dir->dd_dir.d_type = 0;
if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
dir->dd_dir.d_type |= DT_DIR;
else
dir->dd_dir.d_type |= DT_REG;
return &dir->dd_dir;
}
int closedir(DIR *dir)
{
if (!dir) {
errno = EBADF;
return -1;
}
if (dir->dd_handle != INVALID_HANDLE_VALUE)
FindClose(dir->dd_handle);
free(dir);
return 0;
}
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