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C++ png_push_crc_finish函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中png_push_crc_finish函数的典型用法代码示例。如果您正苦于以下问题：C++ png_push_crc_finish函数的具体用法？C++ png_push_crc_finish怎么用？C++ png_push_crc_finish使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了png_push_crc_finish函数的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: png_process_some_data

/* What we do with the incoming data depends on what we were previously
 * doing before we ran out of data...
 */
void /* PRIVATE */
png_process_some_data(png_structp png_ptr, png_infop info_ptr)
{
   if(png_ptr == NULL) return;
   png_ptr->process_mode = 1;
   switch (png_ptr->process_mode)
   {
      case PNG_READ_SIG_MODE:
      {
         png_push_read_sig(png_ptr, info_ptr);
         break;
      }
      case PNG_READ_CHUNK_MODE:
      {
         png_push_read_chunk(png_ptr, info_ptr);
         break;
      }
      case PNG_READ_IDAT_MODE:
      {
         png_push_read_IDAT(png_ptr);
         break;
      }
#if defined(PNG_READ_tEXt_SUPPORTED)
      case PNG_READ_tEXt_MODE:
      {
         png_push_read_tEXt(png_ptr, info_ptr);
         break;
      }
#endif
#if defined(PNG_READ_zTXt_SUPPORTED)
      case PNG_READ_zTXt_MODE:
      {
         png_push_read_zTXt(png_ptr, info_ptr);
         break;
      }
#endif
#if defined(PNG_READ_iTXt_SUPPORTED)
      case PNG_READ_iTXt_MODE:
      {
         png_push_read_iTXt(png_ptr, info_ptr);
         break;
      }
#endif
      case PNG_SKIP_MODE:
      {
         png_push_crc_finish(png_ptr);
         break;
      }
      default:
      {
         png_ptr->buffer_size = 0;
         break;
      }
   }
}
开发者ID:ht13，项目名称:libpng-cve，代码行数:58，代码来源:pngpread.c


示例2: png_process_some_data

/* What we do with the incoming data depends on what we were previously
 * doing before we ran out of data...
 */
void /* PRIVATE */
png_process_some_data(png_structp png_ptr, png_infop info_ptr)
{
   if (png_ptr == NULL)
      return;

   switch (png_ptr->process_mode)
   {
      case PNG_READ_SIG_MODE:
      {
         png_push_read_sig(png_ptr, info_ptr);
         break;
      }

      case PNG_READ_CHUNK_MODE:
      {
         png_push_read_chunk(png_ptr, info_ptr);
         break;
      }

      case PNG_READ_IDAT_MODE:
      {
         png_push_read_IDAT(png_ptr);
         break;
      }

      case PNG_SKIP_MODE:
      {
         png_push_crc_finish(png_ptr);
         break;
      }

      default:
      {
         png_ptr->buffer_size = 0;
         break;
      }
   }
}
开发者ID:0004c，项目名称:node-gdal，代码行数:42，代码来源:pngpread.c


示例3: png_push_read_iTXt

void /* PRIVATE */
png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
{

   if (png_ptr->buffer_size && png_ptr->current_text_left)
   {
      png_size_t text_size;

      if (png_ptr->buffer_size < png_ptr->current_text_left)
         text_size = png_ptr->buffer_size;
      else
         text_size = png_ptr->current_text_left;
      png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
      png_ptr->current_text_left -= text_size;
      png_ptr->current_text_ptr += text_size;
   }
   if (!(png_ptr->current_text_left))
   {
      png_textp text_ptr;
      png_charp key;
      int comp_flag;
      png_charp lang;
      png_charp lang_key;
      png_charp text;
      int ret;

      if (png_ptr->buffer_size < 4)
      {
         png_push_save_buffer(png_ptr);
         return;
      }

      png_push_crc_finish(png_ptr);

#if defined(PNG_MAX_MALLOC_64K)
      if (png_ptr->skip_length)
         return;
#endif

      key = png_ptr->current_text;

      for (lang = key; *lang; lang++)
         /* empty loop */ ;

      if (lang < key + png_ptr->current_text_size - 3)
         lang++;

      comp_flag = *lang++;
      lang++;     /* skip comp_type, always zero */

      for (lang_key = lang; *lang_key; lang_key++)
         /* empty loop */ ;
      lang_key++;        /* skip NUL separator */

      text=lang_key;
      if (lang_key < key + png_ptr->current_text_size - 1)
      {
        for (; *text; text++)
           /* empty loop */ ;
      }

      if (text < key + png_ptr->current_text_size)
         text++;

      text_ptr = (png_textp)png_malloc(png_ptr,
         (png_uint_32)png_sizeof(png_text));
      text_ptr->compression = comp_flag + 2;
      text_ptr->key = key;
      text_ptr->lang = lang;
      text_ptr->lang_key = lang_key;
      text_ptr->text = text;
      text_ptr->text_length = 0;
      text_ptr->itxt_length = png_strlen(text);

      ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);

      png_ptr->current_text = NULL;

      png_free(png_ptr, text_ptr);
      if (ret)
        png_warning(png_ptr, "Insufficient memory to store iTXt chunk.");
   }
}
开发者ID:AGenews，项目名称:GUI，代码行数:83，代码来源:pngpread.c


示例4: png_push_read_zTXt

void /* PRIVATE */
png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
{
   if (png_ptr->buffer_size && png_ptr->current_text_left)
   {
      png_size_t text_size;

      if (png_ptr->buffer_size < (png_uint_32)png_ptr->current_text_left)
         text_size = png_ptr->buffer_size;
      else
         text_size = png_ptr->current_text_left;
      png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
      png_ptr->current_text_left -= text_size;
      png_ptr->current_text_ptr += text_size;
   }
   if (!(png_ptr->current_text_left))
   {
      png_textp text_ptr;
      png_charp text;
      png_charp key;
      int ret;
      png_size_t text_size, key_size;

      if (png_ptr->buffer_size < 4)
      {
         png_push_save_buffer(png_ptr);
         return;
      }

      png_push_crc_finish(png_ptr);

      key = png_ptr->current_text;

      for (text = key; *text; text++)
         /* empty loop */ ;

      /* zTXt can't have zero text */
      if (text >= key + png_ptr->current_text_size)
      {
         png_ptr->current_text = NULL;
         png_free(png_ptr, key);
         return;
      }

      text++;

      if (*text != PNG_TEXT_COMPRESSION_zTXt) /* check compression byte */
      {
         png_ptr->current_text = NULL;
         png_free(png_ptr, key);
         return;
      }

      text++;

      png_ptr->zstream.next_in = (png_bytep )text;
      png_ptr->zstream.avail_in = (uInt)(png_ptr->current_text_size -
         (text - key));
      png_ptr->zstream.next_out = png_ptr->zbuf;
      png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;

      key_size = text - key;
      text_size = 0;
      text = NULL;
      ret = Z_STREAM_END;

      while (png_ptr->zstream.avail_in)
      {
         ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
         if (ret != Z_OK && ret != Z_STREAM_END)
         {
            inflateReset(&png_ptr->zstream);
            png_ptr->zstream.avail_in = 0;
            png_ptr->current_text = NULL;
            png_free(png_ptr, key);
            png_free(png_ptr, text);
            return;
         }
         if (!(png_ptr->zstream.avail_out) || ret == Z_STREAM_END)
         {
            if (text == NULL)
            {
               text = (png_charp)png_malloc(png_ptr,
                  (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
                     + key_size + 1));
               png_memcpy(text + key_size, png_ptr->zbuf,
                  png_ptr->zbuf_size - png_ptr->zstream.avail_out);
               png_memcpy(text, key, key_size);
               text_size = key_size + png_ptr->zbuf_size -
                  png_ptr->zstream.avail_out;
               *(text + text_size) = '\0';
            }
            else
            {
               png_charp tmp;

               tmp = text;
               text = (png_charp)png_malloc(png_ptr, text_size +
                  (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
                   + 1));
//.........这里部分代码省略.........
开发者ID:AGenews，项目名称:GUI，代码行数:101，代码来源:pngpread.c


示例5: png_push_read_tEXt

void /* PRIVATE */
png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
{
   if (png_ptr->buffer_size && png_ptr->current_text_left)
   {
      png_size_t text_size;

      if (png_ptr->buffer_size < png_ptr->current_text_left)
         text_size = png_ptr->buffer_size;
      else
         text_size = png_ptr->current_text_left;
      png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
      png_ptr->current_text_left -= text_size;
      png_ptr->current_text_ptr += text_size;
   }
   if (!(png_ptr->current_text_left))
   {
      png_textp text_ptr;
      png_charp text;
      png_charp key;
      int ret;

      if (png_ptr->buffer_size < 4)
      {
         png_push_save_buffer(png_ptr);
         return;
      }

      png_push_crc_finish(png_ptr);

#if defined(PNG_MAX_MALLOC_64K)
      if (png_ptr->skip_length)
         return;
#endif

      key = png_ptr->current_text;

      for (text = key; *text; text++)
         /* empty loop */ ;

      if (text < key + png_ptr->current_text_size)
         text++;

      text_ptr = (png_textp)png_malloc(png_ptr,
         (png_uint_32)png_sizeof(png_text));
      text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
      text_ptr->key = key;
#ifdef PNG_iTXt_SUPPORTED
      text_ptr->lang = NULL;
      text_ptr->lang_key = NULL;
#endif
      text_ptr->text = text;

      ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);

      png_free(png_ptr, key);
      png_free(png_ptr, text_ptr);
      png_ptr->current_text = NULL;

      if (ret)
        png_warning(png_ptr, "Insufficient memory to store text chunk.");
   }
}
开发者ID:AGenews，项目名称:GUI，代码行数:63，代码来源:pngpread.c



注：本文中的png_push_crc_finish函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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