Generalized support for referencing resources in external WIMs

[wimlib] / src / win32_replacements.c

diff --git a/src/win32_replacements.c b/src/win32_replacements.c
index 17861ef72d02be5349254b55f375b08c9049191c..4e9df0aee8a5a538676176fd74a3d20819222513 100644 (file)
--- a/src/win32_replacements.c
+++ b/src/win32_replacements.c
@@ -28,12 +28,14 @@
 #  include "config.h"
 #endif
 
+#include <errno.h>
 #include <pthread.h>
 #include <shlwapi.h> /* for PathMatchSpecW() */
 #include "wimlib/win32_common.h"
 
 #include "wimlib/assert.h"
 #include "wimlib/file_io.h"
+#include "wimlib/glob.h"
 #include "wimlib/error.h"
 #include "wimlib/util.h"
 
@@ -287,5 +289,109 @@ out:
        return ret;
 }
 
+/* Replacement for glob() in Windows native builds that operates on wide
+ * characters.  */
+int
+win32_wglob(const wchar_t *pattern, int flags,
+           int (*errfunc)(const wchar_t *epath, int eerrno),
+           glob_t *pglob)
+{
+       WIN32_FIND_DATAW dat;
+       DWORD err;
+       HANDLE hFind;
+       int ret;
+       size_t nspaces;
+
+       const wchar_t *backslash, *end_slash;
+       size_t prefix_len;
+
+       backslash = wcsrchr(pattern, L'\\');
+       end_slash = wcsrchr(pattern, L'/');
+
+       if (backslash > end_slash)
+               end_slash = backslash;
+
+       if (end_slash)
+               prefix_len = end_slash - pattern + 1;
+       else
+               prefix_len = 0;
+
+       /* This function does not support all functionality of the POSIX glob(),
+        * so make sure the parameters are consistent with supported
+        * functionality. */
+       wimlib_assert(errfunc == NULL);
+       wimlib_assert((flags & GLOB_ERR) == GLOB_ERR);
+       wimlib_assert((flags & ~(GLOB_NOSORT | GLOB_ERR)) == 0);
+
+       hFind = FindFirstFileW(pattern, &dat);
+       if (hFind == INVALID_HANDLE_VALUE) {
+               err = GetLastError();
+               if (err == ERROR_FILE_NOT_FOUND) {
+                       errno = 0;
+                       return GLOB_NOMATCH;
+               } else {
+                       /* The other possible error codes for FindFirstFile()
+                        * are undocumented. */
+                       errno = EIO;
+                       return GLOB_ABORTED;
+               }
+       }
+       pglob->gl_pathc = 0;
+       pglob->gl_pathv = NULL;
+       nspaces = 0;
+       do {
+               wchar_t *path;
+               if (pglob->gl_pathc == nspaces) {
+                       size_t new_nspaces;
+                       wchar_t **pathv;
+
+                       new_nspaces = nspaces * 2 + 1;
+                       pathv = REALLOC(pglob->gl_pathv,
+                                       new_nspaces * sizeof(pglob->gl_pathv[0]));
+                       if (!pathv)
+                               goto oom;
+                       pglob->gl_pathv = pathv;
+                       nspaces = new_nspaces;
+               }
+               size_t filename_len = wcslen(dat.cFileName);
+               size_t len_needed = prefix_len + filename_len;
+
+               path = MALLOC((len_needed + 1) * sizeof(wchar_t));
+               if (!path)
+                       goto oom;
+
+               wmemcpy(path, pattern, prefix_len);
+               wmemcpy(path + prefix_len, dat.cFileName, filename_len + 1);
+               pglob->gl_pathv[pglob->gl_pathc++] = path;
+       } while (FindNextFileW(hFind, &dat));
+       err = GetLastError();
+       CloseHandle(hFind);
+       if (err == ERROR_NO_MORE_FILES) {
+               errno = 0;
+               return 0;
+       } else {
+               /* Other possible error codes for FindNextFile() are
+                * undocumented */
+               errno = EIO;
+               ret = GLOB_ABORTED;
+               goto fail_globfree;
+       }
+oom:
+       CloseHandle(hFind);
+       errno = ENOMEM;
+       ret = GLOB_NOSPACE;
+fail_globfree:
+       globfree(pglob);
+       return ret;
+}
+
+void
+globfree(glob_t *pglob)
+{
+       size_t i;
+       for (i = 0; i < pglob->gl_pathc; i++)
+               free(pglob->gl_pathv[i]);
+       free(pglob->gl_pathv);
+}
 
 #endif /* __WIN32__ */