png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
png_create_read_struct(png_const_charp user_png_ver, png_voidp error_ptr,   png_error_ptr error_fn, png_error_ptr warn_fn){#ifdef PNG_USER_MEM_SUPPORTED   return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn,      warn_fn, png_voidp_NULL, png_malloc_ptr_NULL, png_free_ptr_NULL));}/* Alternate create PNG structure for reading, and allocate any memory needed. */png_structp PNGAPIpng_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,   png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,   png_malloc_ptr malloc_fn, png_free_ptr free_fn){#endif /* PNG_USER_MEM_SUPPORTED */   png_structp png_ptr;#ifdef PNG_SETJMP_SUPPORTED#ifdef USE_FAR_KEYWORD   jmp_buf jmpbuf;#endif#endif   int i;   png_debug(1, "in png_create_read_struct\n");#ifdef PNG_USER_MEM_SUPPORTED   png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,      (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);#else   png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);#endif   if (png_ptr == NULL)      return (NULL);#if !defined(PNG_1_0_X)#ifdef PNG_ASSEMBLER_CODE_SUPPORTED   png_init_mmx_flags(png_ptr);   /* 1.2.0 addition */#endif#endif /* PNG_1_0_X */#ifdef PNG_SETJMP_SUPPORTED#ifdef USE_FAR_KEYWORD   if (setjmp(jmpbuf))#else   if (setjmp(png_ptr->jmpbuf))#endif   {      png_free(png_ptr, png_ptr->zbuf);      png_ptr->zbuf=NULL;#ifdef PNG_USER_MEM_SUPPORTED      png_destroy_struct_2((png_voidp)png_ptr,          (png_free_ptr)free_fn, (png_voidp)mem_ptr);#else      png_destroy_struct((png_voidp)png_ptr);#endif      return (NULL);   }#ifdef USE_FAR_KEYWORD   png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));#endif#endif#ifdef PNG_USER_MEM_SUPPORTED   png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);#endif   png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);   i=0;   do   {     if(user_png_ver[i] != png_libpng_ver[i])        png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;   } while (png_libpng_ver[i++]);   if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)   {     /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so      * we must recompile any applications that use any older library version.      * For versions after libpng 1.0, we will be compatible, so we need      * only check the first digit.      */     if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||         (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||         (user_png_ver[0] == '0' && user_png_ver[2] < '9'))     {#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)        char msg[80];        if (user_png_ver)        {          sprintf(msg, "Application was compiled with png.h from libpng-%.20s",             user_png_ver);          png_warning(png_ptr, msg);        }        sprintf(msg, "Application  is  running with png.c from libpng-%.20s",           png_libpng_ver);        png_warning(png_ptr, msg);#endif#ifdef PNG_ERROR_NUMBERS_SUPPORTED        png_ptr->flags=0;#endif        png_error(png_ptr,           "Incompatible libpng version in application and library");     }   }   /* initialize zbuf - compression buffer */   png_ptr->zbuf_size = PNG_ZBUF_SIZE;   png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,     (png_uint_32)png_ptr->zbuf_size);   png_ptr->zstream.zalloc = png_zalloc;   png_ptr->zstream.zfree = png_zfree;   png_ptr->zstream.opaque = (voidpf)png_ptr;   switch (inflateInit(&png_ptr->zstream))   {     case Z_OK: /* Do nothing */ break;     case Z_MEM_ERROR:     case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory error"); break;     case Z_VERSION_ERROR: png_error(png_ptr, "zlib version error"); break;     default: png_error(png_ptr, "Unknown zlib error");   }   png_ptr->zstream.next_out = png_ptr->zbuf;   png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;   png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL);#ifdef PNG_SETJMP_SUPPORTED/* Applications that neglect to set up their own setjmp() and then encounter   a png_error() will longjmp here.  Since the jmpbuf is then meaningless we   abort instead of returning. */#ifdef USE_FAR_KEYWORD   if (setjmp(jmpbuf))      PNG_ABORT();   png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));#else   if (setjmp(png_ptr->jmpbuf))      PNG_ABORT();#endif#endif   return (png_ptr);}