IsaacShoebottom/CS3413
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Make operation reversable

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Before didn't write the final IEND chunk
This commit is contained in:
Isaac Shoebottom 2023-12-04 20:29:04 -04:00
parent 0a18d16eb0
commit 73234d0764
1 changed files with 2 additions and 3 deletions
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5
Assignment9/src/png.c
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@ -126,7 +126,7 @@ int get_number_of_chunks(png_chunk **chunks) {
while (memcmp(chunks[i]->type, "IEND", 4) != 0) { while (memcmp(chunks[i]->type, "IEND", 4) != 0) {
i++; i++;
} }
return i; return ++i;
} }
void xor_data(png_chunk *chunk) { void xor_data(png_chunk *chunk) {
@ -139,8 +139,7 @@ void xor_data(png_chunk *chunk) {
void destroy_chunks(png_chunk **chunks) { void destroy_chunks(png_chunk **chunks) {
unsigned int size = get_number_of_chunks(chunks); unsigned int size = get_number_of_chunks(chunks);
// +1 for IEND chunk for (int i = 0; i < size; i++) {
for (int i = 0; i < size + 1; i++) {
free(chunks[i]->data); free(chunks[i]->data);
free(chunks[i]); free(chunks[i]);
} }