diff mbox series

[FFmpeg-devel,v10,1/6] libavutil/wchar_filename.h: Add whcartoutf8, wchartoansi and utf8toansi

Message ID 20220423200335.36487-1-nil-admirari@mailo.com
State New
Headers show
Series [FFmpeg-devel,v10,1/6] libavutil/wchar_filename.h: Add whcartoutf8, wchartoansi and utf8toansi | expand

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Commit Message

Nil Admirari April 23, 2022, 8:03 p.m. UTC
These functions are going to be used in libavformat/avisynth.c
and fftools/cmdutils.c remove MAX_PATH limit.
---
 libavutil/wchar_filename.h | 52 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
diff mbox series

Patch

diff --git a/libavutil/wchar_filename.h b/libavutil/wchar_filename.h
index 90f08245..5fdd2ff0 100644
--- a/libavutil/wchar_filename.h
+++ b/libavutil/wchar_filename.h
@@ -1,3 +1,4 @@ 
+
 /*
  * This file is part of FFmpeg.
  *
@@ -40,6 +41,57 @@  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(unsigned int code_page, const wchar_t *filename_w,
+                            char **filename)
+{
+    DWORD flags = code_page == CP_UTF8 ? MB_ERR_INVALID_CHARS : 0;
+    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_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 */