#include "../includes/futil.h"
#include <stdio.h>

//Reference: https://stackoverflow.com/a/44894946
int ReadAllString(const char* path, char** content_ptr, size_t* bytes_read) {
    if (!path || !content_ptr || !bytes_read) return 0;

    FILE *file = fopen(path, "rb");

    if (!file) {
        fprintf(stderr, "Failed to open '%s'. %s.\n", path, strerror(errno));
        return 0;
    }

    char *content = NULL, *temp = NULL;
    size_t used = 0, capacity = 0, read = 0;

    while(1) {
        if (used + FUTIL_READ_SIZE + 1 > capacity) {
            capacity = used + FUTIL_READ_SIZE + 1;

            temp = realloc(content, capacity);

            if (!temp) {
                fprintf(stderr, "Failed to realloc space for file contents. %s.\n", strerror(errno));
                free(content);
                fclose(file);
                return 0;
            }

            content = temp;
        }

        read = fread(content + used, 1, FUTIL_READ_SIZE, file);

        if (read == 0) break;

        used += read;
    }

    fclose(file);
    //Shrink the buffer to fit just the contents of the buffer.
    temp = realloc(content, used + 1);

    if (!temp) {
        fprintf(stderr, "Failed to realloc to only hold the file contents. %s.\n", strerror(errno));
        free(content);
        return 0;
    }

    content = temp;
    content[used] = '\0';

    *content_ptr = content;
    *bytes_read = used;

    return 1;
}