#include "tor_os.h"

void tor_os_create(struct tor_os_str* os, size_t size) {
    os->size = size;
    os->filled = 0;
    os->list = malloc(size * sizeof(char*));
    if (os->list == NULL) {
        fprintf(stderr, "unable to allocate memory\n");
        exit(EXIT_FAILURE);
    }
}

char* tor_os_append(struct tor_os_str* os) {
    if (os->filled == os->size) {
        return NULL;
    }
    char* cur = os->list[os->filled];
    os->filled++;
    return cur;
}

void tor_os_read (struct tor_os_str* os, char* file) {
    FILE* fd = NULL;
    fd = fopen(file, "r");
    if (fd == NULL) {
        return;
    }
    size_t len = 0;
    int n = 0;
    while (1) {
        char* dst = tor_os_append(os);
        if (dst == NULL) break;
        if (getline(&(os->list[n]),&len,fd) == -1) break;
    }
    fclose(fd);
}

void tor_os_free(struct tor_os_str* os) {
    for (int i = 0; i < os->filled; i++) {
        free(os->list[i]);
    }
    free(os->list);
}