gameparser.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stddef.h>

typedef struct {
    uint32_t magic;
    uint32_t count;
    uint8_t stuff[12];
} Hdr;

typedef struct {
    int32_t offset;
    int32_t len;
} FileEntry;

int main(int argc, char *argv[]) {

    Hdr hdr;
    FileEntry ent;

    FILE *f = fopen(argv[1], "rb");
    FILE *c = fopen(argv[2], "rb");

    fread(&hdr, sizeof(Hdr), 1, f);

    for(int i = 0; i <= hdr.count; i++) {
        fread(&ent, sizeof(FileEntry), 1, f);

        if(ent.len < 0)
            continue;

        //Read the entry
        char *buf = malloc(ent.len);
        fseek(c, ent.offset, SEEK_SET);
        fread(buf, 1, ent.len, c);

        //Build the filename
        char fname[256] = "file";
        char num[256];
        itoa(i, num, 10);
        strcat(fname, num);
        strcat(fname, ".bin");

        FILE* n = fopen(fname, "wb");
        fwrite(buf, 1, ent.len, n);
        fclose(n);

        free(buf);
    }

    fclose(c);
    fclose(f);

}