Function append_fmt_checked

src/git/git_context.c:340–355

}

static bool append_fmt_checked(char *buf, int buf_size, int *off, const char *fmt, ...) {
    if (!buf || !off || buf_size <= 0 || *off < 0 || *off >= buf_size) {
        return false;
    }

    va_list ap;
    va_start(ap, fmt);
    int n = vsnprintf(buf + *off, (size_t)(buf_size - *off), fmt, ap);
    va_end(ap);
    if (n < 0 || n >= buf_size - *off) {
        buf[buf_size - 1] = '\0';
        return false;
    }
    *off += n;
    return true;
}

static int json_escaped_len(const char *src) {
    if (!src) {