libavutil/utf8.c
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 /*
  * Copyright (c) 2013 Stefano Sabatini
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
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 #ifdef TEST
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 #include <stdio.h>
 
 #include "libavutil/avstring.h"
 #include "libavutil/file.h"
 
 static void print_sequence(const char *p, int l, int indent)
 {
     int i;
     for (i = 0; i < l; i++)
         printf("%02X", (uint8_t)p[i]);
     printf("%*s", indent-l*2, "");
 }
 
 int main(int argc, char **argv)
 {
     int ret;
     char *filename = argv[1];
     uint8_t *file_buf;
     size_t file_buf_size;
     uint32_t code;
     const uint8_t *p, *endp;
 
     ret = av_file_map(filename, &file_buf, &file_buf_size, 0, NULL);
     if (ret < 0)
         return 1;
 
     p = file_buf;
     endp = file_buf + file_buf_size;
     while (p < endp) {
         int l, r;
         const uint8_t *p0 = p;
         code = UINT32_MAX;
         r = av_utf8_decode(&code, &p, endp, 0);
         l = (int)(p-p0);
         print_sequence(p0, l, 20);
         if (code != UINT32_MAX) {
             printf("%-10d 0x%-10X %-5d ", code, code, l);
             if (r >= 0) {
                 if (*p0 == '\n') printf("\\n\n");
                 else             printf ("%.*s\n", l, p0);
             } else {
                 printf("invalid code range\n");
             }
         } else {
             printf("invalid sequence\n");
         }
     }
 
     av_file_unmap(file_buf, file_buf_size);
     return 0;
 }
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 #endif