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Save_PNG_Sub(): add assert to check function arguments

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Thomas Bernard 2019-01-21 00:30:05 +01:00
parent 119618ae14
commit 5f9be332b4
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1 changed files with 2 additions and 0 deletions
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src/fileformats.c
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@ -57,6 +57,7 @@
#include <stdlib.h> #include <stdlib.h>
#include <assert.h>
#if defined(WIN32) #if defined(WIN32)
#if defined(_MSC_VER) #if defined(_MSC_VER)
#include <stdio.h> #include <stdio.h>
@ -6798,6 +6799,7 @@ void Save_PNG_Sub(T_IO_Context * context, FILE * file, char * * buffer, unsigned
byte cycle_data[16*6]; // Storage for color-cycling data, referenced by crng_chunk byte cycle_data[16*6]; // Storage for color-cycling data, referenced by crng_chunk
struct PNG_memory_buffer memory_buffer; struct PNG_memory_buffer memory_buffer;
assert((file != NULL) || ((buffer != NULL) && (buffer_size != NULL)));
memset(&memory_buffer, 0, sizeof(memory_buffer)); memset(&memory_buffer, 0, sizeof(memory_buffer));
/* initialisation */ /* initialisation */
if ((png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL)) if ((png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL))