#include "helpers.h"
#include <string.h>
#include <stdlib.h>

char *readFileC(const char *filename){
    //open file
    FILE *fp = fopen(filename, "r+");

    if(!fp) return NULL;

    //go to end and get length
    fseek(fp, 0, SEEK_END);
    long len = ftell(fp);
    
    //allocate enough memory for the string on the heap
    char *ret = (char*)malloc(len);
    
    //go back to the beginning and read everything to the string
    fseek(fp, 0, SEEK_SET);
    fread(ret, 1, len, fp);

    //close the stream
    fclose(fp);

    return ret;
}


sizedData readFileR(const char *filename){
    sizedData ret = {NULL,0};

    //open file
    FILE *fp = fopen(filename, "r+");
    if(!fp) return ret;

    //go to end and get length
    fseek(fp, 0, SEEK_END);
    long len = ftell(fp);

    //allocate enough memory for the data on the heap
    ret.data = malloc(len);

    //go back to the beginning and read everything
    fseek(fp, 0, SEEK_SET);
    fread(ret.data, 1, len, fp);

    //set length of data
    ret.length=len;
    
    //close the stream
    fclose(fp);

    return ret;
}

int writeFileC(const char *filename, char *data){
    //open file
    FILE *fp = fopen(filename, "w+");
    if(!fp) return -1;

    //write the data
    fwrite(data, sizeof(char), strlen(data), fp);

    //close the stream
    fclose(fp);

    return 0;
}


int writeFileR(const char *filename, sizedData data){
    //open file
    FILE *fp = fopen(filename, "w+");
    if(!fp) return -1;

    //write the data
    fwrite(data.data, 1, data.length, fp);

    //close the stream
    fclose(fp);

    return 0;
}

void crash(char *reason){
    PRINTE(reason);
    exit(EXIT_FAILURE); 
}