IsaacShoebottom/CS3413
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Make operation reversable

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

5
Assignment9/src/png.c
View File

@@ -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]);
} }