Function string_alloc

src/utils/htslib/cram/string_alloc.c:110–137

/* allocate space for a string */

char *string_alloc(string_alloc_t *a_str, size_t length) {
    string_t *str;
    char *ret;

    if (length <= 0) return NULL;

    // add to last string pool if we have space
    if (a_str->nstrings) {
        str = &a_str->strings[a_str->nstrings - 1];

        if (str->used + length < a_str->max_length) {
            ret = str->str + str->used;
            str->used += length;
            return ret;
        }
    }

    // increase the max length if needs be
    if (length > a_str->max_length) a_str->max_length = length;

    // need a new string pool
    str = new_string_pool(a_str);

    if (NULL == str) return NULL;

    str->used = length;
    return str->str;
}


/* equivalent to strdup */