void buffer_sprintf(BUFFER *wb, const char *fmt, ...)
{
if(unlikely(!fmt || !*fmt)) return;
buffer_need_bytes(wb, 1);
size_t len = wb->size - wb->len, wrote;
va_list args;
va_start(args, fmt);
wrote = (size_t) vsnprintf(&wb->buffer[wb->len], len, fmt, args);
va_end(args);
if(unlikely(wrote >= len)) {
// there is bug in vsnprintf() and it returns
// a number higher to len, but it does not
// overflow the buffer.
// our buffer overflow detector will log it
// if it does.
buffer_overflow_check(wb);
debug(D_WEB_BUFFER, "web_buffer_sprintf(): increasing web_buffer at position %ld, size = %ld\n", wb->len, wb->size);
buffer_need_bytes(wb, len + WEB_DATA_LENGTH_INCREASE_STEP);
va_start(args, fmt);
buffer_vsprintf(wb, fmt, args);
va_end(args);
}
else
wb->len += wrote;
// the buffer is \0 terminated by vsnprintf
}
void buffer_sprintf(BUFFER *wb, const char *fmt, ...)
{
if(unlikely(!fmt || !*fmt)) return;
buffer_need_bytes(wb, 2);
size_t len = wb->size - wb->len - 1;
size_t wrote;
va_list args;
va_start(args, fmt);
wrote = (size_t) vsnprintfz(&wb->buffer[wb->len], len, fmt, args);
va_end(args);
if(unlikely(wrote >= len)) {
// truncated
buffer_overflow_check(wb);
debug(D_WEB_BUFFER, "web_buffer_sprintf(): increasing web_buffer at position %zu, size = %zu\n", wb->len, wb->size);
buffer_need_bytes(wb, len + WEB_DATA_LENGTH_INCREASE_STEP);
va_start(args, fmt);
buffer_vsprintf(wb, fmt, args);
va_end(args);
}
else
wb->len += wrote;
// the buffer is \0 terminated by vsnprintf
}
test_vsprintf(struct buffer *buffer, const char *format, ...)
{
va_list args;
va_start(args, format);
buffer_vsprintf(buffer, format, args);
va_end(args);
}
