[C] garc_dll.c

/*
*       Garc.dll
*         by Reisyukaku
*
*   Set of functions to handle GARC files in the RomFS.
*/

#include <stdio.h>
#include <stdlib.h>
#include "garc_dll.h"

EXPORT int* getgarcs(char* file){

    FILE* fp;
    fp = fopen(file, "rb");
    if (!fp) {
        fclose(fp);
        fprintf(stderr, "Error while opening file %s for reading\n", file);
        return NULL;
    }
    fseek(fp, 0, SEEK_SET);
    unsigned char magic[4];
    int currOff = 0, cnt = 1;
    int* list = malloc(sizeof(int));
    list[0] = 0;
    while(!(feof(fp) || ferror(fp))){
        currOff += fread(magic, 1, 4, fp);
        if(magic[0] == 0x43 && magic[1] == 0x52 && magic[2] == 0x41 && magic[3] == 0x47){
            printf("0x%08x\n", currOff - 0x4);
            list = realloc(list, sizeof(int) * (cnt + 1));
            list[cnt++] = currOff - 0x4;
        }
    }
    list[0] = cnt - 1;
    fclose(fp);
    return list;
}

EXPORT void writegarc(char* inFile, char* outFile, int garcOff, int len){

    FILE* fi, *fo;
    fi = fopen(inFile, "rb");
    fo = fopen(outFile, "wb");
    if (!fi) {
        fclose(fi);
        fprintf(stderr, "Error while opening file %s for reading\n", inFile);
        return;
    }
    fseek(fi, garcOff, SEEK_SET);
    fseek(fo, 0, SEEK_SET);

    int i = 0;
    while(!(feof(fi) || ferror(fi) || ferror(fo)) && i < len){
        char romfsBytes[0x10];
        fread(romfsBytes, 1, 0x10, fi);
        fwrite(romfsBytes, 1, 0x10, fo);
        i+=0x10;
    }
    fclose(fi);
    fclose(fo);
}