size_t multipart_buffer_read()

in src/request/apache_multipart_buffer.c [253:289]

• 24 lines of code
• 8 McCabe index (conditional complexity)

size_t multipart_buffer_read(multipart_buffer *self, char *buf, size_t bytes)
{
	size_t 	max;
    size_t 	len;
    char*	bound;

    /* fill buffer if needed */
    if(bytes > self->bytes_in_buffer) fill_buffer(self);

    /* look for a potential boundary match, only read data up to that point */
    if( (bound = my_memstr(self->buf_begin, self->bytes_in_buffer, self->boundary_next, 1)) ) {
		max = bound - self->buf_begin;
    } else {
		max = self->bytes_in_buffer;
		}
    /* maximum number of bytes we are reading */
    len = max < bytes-1 ? max : bytes-1;


    /* if we read any data... */
    if (len > 0) {
		/* copy the data */
		memcpy(buf, self->buf_begin, len);
		buf[len] = 0;
		if(bound && len > 0 && buf[len-1] == '\r') buf[--len] = 0;

		/* update the buffer */
		self->bytes_in_buffer -= (int)len;
		self->buf_begin += len;
    }

#ifdef DEBUG
    ap_log_rerror(MPB_ERROR, "multipart_buffer_read: %d bytes", len);
#endif

    return len;
}