/* Alternate create PNG structure for reading, and allocate any memory needed. */ png_structp PNGAPI png_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 */ /* added at libpng-1.2.6 */ #ifdef PNG_SET_USER_LIMITS_SUPPORTED png_ptr->user_width_max=PNG_USER_WIDTH_MAX; png_ptr->user_height_max=PNG_USER_HEIGHT_MAX; #endif #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,png_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,png_sizeof(jmp_buf)); #else if (setjmp(png_ptr->jmpbuf)) PNG_ABORT(); #endif #endif return (png_ptr); }
/* Alternate create PNG structure for reading, and allocate any memory * needed. */ png_structp PNGAPI png_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 */ #ifdef PNG_SETJMP_SUPPORTED volatile #endif png_structp png_ptr; volatile int png_cleanup_needed = 0; #ifdef PNG_SETJMP_SUPPORTED #ifdef USE_FAR_KEYWORD jmp_buf jmpbuf; #endif #endif int i; png_debug(1, "in png_create_read_struct"); #ifdef PNG_USER_MEM_SUPPORTED png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, malloc_fn, mem_ptr); #else png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); #endif if (png_ptr == NULL) return (NULL); /* Added at libpng-1.2.6 */ #ifdef PNG_USER_LIMITS_SUPPORTED png_ptr->user_width_max = PNG_USER_WIDTH_MAX; png_ptr->user_height_max = PNG_USER_HEIGHT_MAX; # ifdef PNG_USER_CHUNK_CACHE_MAX /* Added at libpng-1.2.43 and 1.4.0 */ png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX; # endif # ifdef PNG_SET_USER_CHUNK_MALLOC_MAX /* Added at libpng-1.2.43 and 1.4.1 */ png_ptr->user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX; # endif #endif #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)) #else if (setjmp(png_jmpbuf(png_ptr))) /* Sets longjmp to match setjmp */ #endif PNG_ABORT(); #ifdef USE_FAR_KEYWORD png_memcpy(png_jmpbuf(png_ptr), jmpbuf, png_sizeof(jmp_buf)); #endif #endif /* PNG_SETJMP_SUPPORTED */ #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); if (user_png_ver) { i = 0; do { if (user_png_ver[i] != png_libpng_ver[i]) png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; } while (png_libpng_ver[i++]); } else png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; 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')) { #ifdef PNG_STDIO_SUPPORTED char msg[80]; if (user_png_ver) { png_snprintf(msg, 80, "Application was compiled with png.h from libpng-%.20s", user_png_ver); png_warning(png_ptr, msg); } png_snprintf(msg, 80, "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_warning(png_ptr, "Incompatible libpng version in application and library"); png_cleanup_needed = 1; } } if (!png_cleanup_needed) { /* Initialize zbuf - compression buffer */ png_ptr->zbuf_size = PNG_ZBUF_SIZE; png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, png_ptr->zbuf_size); if (png_ptr->zbuf == NULL) png_cleanup_needed = 1; } png_ptr->zstream.zalloc = png_zalloc; png_ptr->zstream.zfree = png_zfree; png_ptr->zstream.opaque = (voidpf)png_ptr; if (!png_cleanup_needed) { switch (inflateInit(&png_ptr->zstream)) { case Z_OK: /* Do nothing */ break; case Z_MEM_ERROR: case Z_STREAM_ERROR: png_warning(png_ptr, "zlib memory error"); png_cleanup_needed = 1; break; case Z_VERSION_ERROR: png_warning(png_ptr, "zlib version error"); png_cleanup_needed = 1; break; default: png_warning(png_ptr, "Unknown zlib error"); png_cleanup_needed = 1; } } if (png_cleanup_needed) { /* Clean up PNG structure and deallocate any memory. */ 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); } png_ptr->zstream.next_out = png_ptr->zbuf; png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; png_set_read_fn(png_ptr, NULL, NULL); return (png_ptr); }
png_structp PNGAPI png_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_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_MMX_CODE_SUPPORTED png_init_mmx_flags(png_ptr); #endif #endif #ifdef PNG_SET_USER_LIMITS_SUPPORTED png_ptr->user_width_max=PNG_USER_WIDTH_MAX; png_ptr->user_height_max=PNG_USER_HEIGHT_MAX; #endif #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,png_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) { 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) { png_snprintf(msg, 80, "Application was compiled with png.h from libpng-%.20s", user_png_ver); png_warning(png_ptr, msg); } png_snprintf(msg, 80, "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"); } } 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: 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 #ifdef USE_FAR_KEYWORD if (setjmp(jmpbuf)) PNG_ABORT(); png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf)); #else if (setjmp(png_ptr->jmpbuf)) PNG_ABORT(); #endif #endif return (png_ptr); }