These functions are going to be used in libavformat/avisynth.c
and fftools/cmdutils.c when replacing MAX_PATH-sized buffers
with dynamically sized ones.
---
libavutil/wchar_filename.h | 51 ++++++++++++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/libavutil/wchar_filename.h b/libavutil/wchar_filename.h
index 90f0824..70cd5a4 100644
--- a/libavutil/wchar_filename.h
+++ b/libavutil/wchar_filename.h
@@ -40,6 +40,57 @@ static inline int utf8towchar(const char *filename_utf8,
wchar_t **filename_w)
MultiByteToWideChar(CP_UTF8, 0, filename_utf8, -1, *filename_w, num_chars);
return 0;
}
+
+av_warn_unused_result
+static inline int wchartocp(const unsigned int code_page, const wchar_t
*filename_w,
+ char **filename)
+{
+ const int flags = code_page == CP_UTF8 ? MB_ERR_INVALID_CHARS : 0;
+ const int num_chars = WideCharToMultiByte(code_page, flags, filename_w, -1,
+ NULL, 0, NULL, NULL);
+ if (num_chars <= 0) {
+ *filename = NULL;
+ return 0;
+ }
+ *filename = av_calloc(num_chars, sizeof(char));
+ if (!*filename) {
+ errno = ENOMEM;
+ return -1;
+ }
+ WideCharToMultiByte(code_page, flags, filename_w, -1,
+ *filename, num_chars, NULL, NULL);
+ return 0;
+}
+
+av_warn_unused_result
+static inline int wchartoutf8(const wchar_t *filename_w, char **filename)
+{
+ return wchartocp(CP_UTF8, filename_w, filename);
+}
+
+av_warn_unused_result
+static inline int wchartoansi(const wchar_t *filename_w, char **filename)
+{
+ return wchartocp(CP_THREAD_ACP, filename_w, filename);
+}
+
+av_warn_unused_result
+static inline int utf8toansi(const char *filename_utf8, char **filename)
+{
+ wchar_t *filename_w = NULL;
+ int ret = -1;
+ if (utf8towchar(filename_utf8, &filename_w))
+ return -1;
+
+ if (!filename_w) {
+ *filename = NULL;
+ return 0;
+ }
+
+ ret = wchartoansi(filename_w, filename);
+ av_free(filename_w);
+ return ret;
+}
#endif
#endif /* AVUTIL_WCHAR_FILENAME_H */
--
2.32.0
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