| New file |
| | |
| | | #include <errno.h> |
| | | #include <stdbool.h> |
| | | #include <stdint.h> |
| | | #include <stdio.h> |
| | | #include <stdlib.h> |
| | | #include <string.h> |
| | | |
| | | #include "mojodds.h" |
| | | |
| | | |
| | | // helper for fuzzing with AFL |
| | | // if you don't know what this is you don't need it |
| | | |
| | | |
| | | int main(int argc, char *argv[]) { |
| | | if (argc != 2) { |
| | | return 0; |
| | | } |
| | | |
| | | const char *filename = argv[1]; |
| | | |
| | | FILE *f = fopen(filename, "rb"); |
| | | if (!f) { |
| | | return 1; |
| | | } |
| | | |
| | | fseek(f, 0, SEEK_END); |
| | | long size = ftell(f); |
| | | fseek(f, 0, SEEK_SET); |
| | | |
| | | char *contents = malloc(size); |
| | | size_t readbytes = fread(contents, 1, size, f); |
| | | if (readbytes != size) { |
| | | free(contents); |
| | | fclose(f); |
| | | return 2; |
| | | } |
| | | |
| | | fclose(f); |
| | | |
| | | int isDDS = MOJODDS_isDDS(contents, size); |
| | | if (!isDDS) { |
| | | return 3; |
| | | } |
| | | |
| | | const void *tex = NULL; |
| | | unsigned long texlen = 0; |
| | | unsigned int glfmt = 0, w = 0, h = 0, miplevels = 0; |
| | | unsigned int cubemapfacelen = 0; |
| | | MOJODDS_textureType textureType = MOJODDS_TEXTURE_NONE; |
| | | int retval = MOJODDS_getTexture(contents, size, &tex, &texlen, &glfmt, &w, &h, &miplevels, &cubemapfacelen, &textureType); |
| | | if (!retval) { |
| | | free(contents); |
| | | return 4; |
| | | } |
| | | |
| | | uint32_t hash = 0x12345678; |
| | | for (unsigned int miplevel = 0; miplevel < miplevels; miplevel++) { |
| | | const void *miptex = NULL; |
| | | unsigned long miptexlen = 0; |
| | | unsigned int mipW = 0, mipH = 0; |
| | | retval = MOJODDS_getMipMapTexture(miplevel, glfmt, tex, texlen, w, h, &miptex, &miptexlen, &mipW, &mipH); |
| | | if (!retval) { |
| | | continue; |
| | | } |
| | | |
| | | // read every byte to make sure any buffer overflows actually overflow |
| | | const char *miptex_ = (const char *) miptex; |
| | | for (unsigned int i = 0; i < miptexlen; i++) { |
| | | hash = (hash * 65537) ^ miptex_[i]; |
| | | } |
| | | } |
| | | // do something the optimizer is not allowed to remove |
| | | printf("0x%08x\n", hash); |
| | | |
| | | free(contents); |
| | | |
| | | return 0; |
| | | } |