*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-misc.c,v 1.48 2001/03/31 23:13:30 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-misc.c,v 1.49 2001/05/28 15:29:51 tgl Exp $
*
*-------------------------------------------------------------------------
*/
/* Left-justify any data in the buffer to make room */
if (conn->inStart < conn->inEnd)
{
- memmove(conn->inBuffer, conn->inBuffer + conn->inStart,
- conn->inEnd - conn->inStart);
- conn->inEnd -= conn->inStart;
- conn->inCursor -= conn->inStart;
- conn->inStart = 0;
+ if (conn->inStart > 0)
+ {
+ memmove(conn->inBuffer, conn->inBuffer + conn->inStart,
+ conn->inEnd - conn->inStart);
+ conn->inEnd -= conn->inStart;
+ conn->inCursor -= conn->inStart;
+ conn->inStart = 0;
+ }
}
else
+ {
+ /* buffer is logically empty, reset it */
conn->inStart = conn->inCursor = conn->inEnd = 0;
+ }
/*
* If the buffer is fairly full, enlarge it. We need to be able to