- if (mode == _IONBF)
- {
- stream->bufTech = mode;
- return (0);
- }
- if (buf == NULL)
- {
- if (size < 2)
- {
- return (-1);
- }
- mybuf = malloc(size + 8);
- if (mybuf == NULL)
- {
- return (-1);
- }
- }
- else
- {
- if (size < 10)
- {
- return (-1);
- }
- mybuf = buf;
- stream->theirBuffer = 1;
- size -= 8;
- }
- free(stream->intBuffer);
- stream->intBuffer = mybuf;
- stream->fbuf = stream->intBuffer + 2;
- *stream->fbuf++ = '\0';
- *stream->fbuf++ = '\0';
- stream->szfbuf = size;
- stream->endbuf = stream->fbuf + stream->szfbuf;
- *stream->endbuf = '\n';
- stream->upto = stream->endbuf;
- stream->bufTech = mode;
- if (!stream->textMode && (stream->bufTech == _IOLBF))
+#ifndef REGTEST
+
+int setvbuf( FILE * _PDCLIB_restrict stream, char * _PDCLIB_restrict buf, int mode, size_t size )
+{
+ /* TODO: Only allowed on a "virgin" stream; add check. */
+ if ( ( stream->status & ( _IOFBF | _IOLBF | _IONBF ) ) /* Only allowed on "virgin" stream */
+ || ( ( mode != _IOFBF ) && ( mode != _IOLBF ) && ( mode != _IONBF ) ) /* invalid mode */
+ || ( ( buf == NULL ) && ( ( buf = malloc( size ) ) == NULL ) ) /* no memory available */
+ )