#include "../../include/mgl/system/fileutils.h"
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>

int mgl_load_file(const char *filepath, mgl_filedata *filedata, mgl_file_load_options *load_options) {
    const bool null_terminated = load_options ? load_options->null_terminated : false;

    int fd = open(filepath, O_RDONLY);
    if(fd == -1)
        return -1;

    struct stat st;
    if(fstat(fd, &st) == -1) {
        close(fd);
        return -1;
    }

    if(!S_ISREG(st.st_mode)) {
        close(fd);
        return -1;
    }

    unsigned char *data = malloc(st.st_size + (null_terminated ? 1 : 0));
    if(!data) {
        close(fd);
        return -1;
    }

    if(read(fd, data, st.st_size) != st.st_size) {
        free(data);
        close(fd);
        return -1;
    }

    if(null_terminated)
        data[st.st_size] = '\0';

    filedata->data = data;
    filedata->size = st.st_size;

    close(fd);
    return 0;
}

void mgl_filedata_free(mgl_filedata *self) {
    free(self->data);
    self->data = NULL;
    self->size = 0;
}