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Experimental translation from libwebp to Go source.
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unicode_gif.h (1936B)

      1 // Copyright 2018 Google Inc. All Rights Reserved.
      2 //
      3 // Use of this source code is governed by a BSD-style license
      4 // that can be found in the COPYING file in the root of the source
      5 // tree. An additional intellectual property rights grant can be found
      6 // in the file PATENTS. All contributing project authors may
      7 // be found in the AUTHORS file in the root of the source tree.
      8 // -----------------------------------------------------------------------------
      9 //
     10 // giflib doesn't have a Unicode DGifOpenFileName(). Let's make one.
     11 //
     12 // Author: Yannis Guyon (yguyon@google.com)
     13 
     14 #ifndef WEBP_EXAMPLES_UNICODE_GIF_H_
     15 #define WEBP_EXAMPLES_UNICODE_GIF_H_
     16 
     17 #include "./unicode.h"
     18 #ifdef HAVE_CONFIG_H
     19 #include "webp/config.h"  // For WEBP_HAVE_GIF
     20 #endif
     21 
     22 #if defined(WEBP_HAVE_GIF)
     23 
     24 #ifdef _WIN32
     25 #include <fcntl.h>  // Not standard, needed for _topen and flags.
     26 #include <io.h>
     27 #endif
     28 
     29 #include <gif_lib.h>
     30 #include <string.h>
     31 #include "./gifdec.h"
     32 
     33 #if !defined(STDIN_FILENO)
     34 #define STDIN_FILENO 0
     35 #endif
     36 
     37 static GifFileType* DGifOpenFileUnicode(const W_CHAR* file_name, int* error) {
     38   if (!WSTRCMP(file_name, "-")) {
     39 #if LOCAL_GIF_PREREQ(5, 0)
     40     return DGifOpenFileHandle(STDIN_FILENO, error);
     41 #else
     42     (void)error;
     43     return DGifOpenFileHandle(STDIN_FILENO);
     44 #endif
     45   }
     46 
     47 #if defined(_WIN32) && defined(_UNICODE)
     48   {
     49     int file_handle = _wopen(file_name, _O_RDONLY | _O_BINARY);
     50     if (file_handle == -1) {
     51       if (error != NULL) *error = D_GIF_ERR_OPEN_FAILED;
     52       return NULL;
     53     }
     54 
     55 #if LOCAL_GIF_PREREQ(5, 0)
     56     return DGifOpenFileHandle(file_handle, error);
     57 #else
     58     return DGifOpenFileHandle(file_handle);
     59 #endif
     60   }
     61 
     62 #else
     63 
     64 #if LOCAL_GIF_PREREQ(5, 0)
     65   return DGifOpenFileName(file_name, error);
     66 #else
     67   return DGifOpenFileName(file_name);
     68 #endif
     69 
     70 #endif  // defined(_WIN32) && defined(_UNICODE)
     71   // DGifCloseFile() is called later.
     72 }
     73 
     74 #endif  // defined(WEBP_HAVE_GIF)
     75 
     76 #endif  // WEBP_EXAMPLES_UNICODE_GIF_H_