int fill_buffer()

in src/request/apache_multipart_buffer.c [68:100]

• 21 lines of code
• 6 McCabe index (conditional complexity)

int fill_buffer(multipart_buffer *self)
{
    int bytes_to_read, actual_read = 0;

    /* shift the existing data if necessary */
    if(self->bytes_in_buffer > 0 && self->buf_begin != self->buffer)
	memmove(self->buffer, self->buf_begin, self->bytes_in_buffer);

    self->buf_begin = self->buffer;

    /* calculate the free space in the buffer */
    bytes_to_read = self->bufsize - self->bytes_in_buffer;

    if (bytes_to_read >= self->r->remaining) {
        bytes_to_read = (int)(self->r->remaining - (apr_off_t)strlen(self->boundary));
#ifdef DEBUG
        ap_log_rerror(MPB_ERROR, "mozilla 0.97 hack: '%ld'", self->r->remaining);
#endif
    }

    /* read the required number of bytes */
    if(bytes_to_read > 0) {
	char *buf = self->buffer + self->bytes_in_buffer;

	actual_read = ap_get_client_block(self->r, buf, bytes_to_read);

	/* update the buffer length */
	if(actual_read > 0)
	  self->bytes_in_buffer += actual_read;
    }

    return actual_read;
}