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107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/* Copyright (C) 2000-2003 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#include <my_global.h>
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#include <mysql_com.h>
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#include <mysql.h>
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/* Get the length of next field. Change parameter to point at fieldstart */
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ulong STDCALL net_field_length(uchar **packet)
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{
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reg1 uchar *pos= (uchar *)*packet;
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if (*pos < 251)
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{
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(*packet)++;
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return (ulong) *pos;
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}
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if (*pos == 251)
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{
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(*packet)++;
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return NULL_LENGTH;
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}
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if (*pos == 252)
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{
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(*packet)+=3;
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return (ulong) uint2korr(pos+1);
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}
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if (*pos == 253)
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{
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(*packet)+=4;
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return (ulong) uint3korr(pos+1);
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}
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(*packet)+=9; /* Must be 254 when here */
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return (ulong) uint4korr(pos+1);
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}
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/* The same as above but returns longlong */
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my_ulonglong net_field_length_ll(uchar **packet)
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{
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reg1 uchar *pos= *packet;
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if (*pos < 251)
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{
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(*packet)++;
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return (my_ulonglong) *pos;
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}
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if (*pos == 251)
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{
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(*packet)++;
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return (my_ulonglong) NULL_LENGTH;
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}
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if (*pos == 252)
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{
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(*packet)+=3;
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return (my_ulonglong) uint2korr(pos+1);
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}
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if (*pos == 253)
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{
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(*packet)+=4;
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return (my_ulonglong) uint3korr(pos+1);
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}
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(*packet)+=9; /* Must be 254 when here */
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#ifdef NO_CLIENT_LONGLONG
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return (my_ulonglong) uint4korr(pos+1);
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#else
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return (my_ulonglong) uint8korr(pos+1);
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#endif
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}
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char *
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net_store_length(char *pkg, ulonglong length)
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{
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uchar *packet=(uchar*) pkg;
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if (length < LL(251))
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{
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*packet=(uchar) length;
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return (char*) packet+1;
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}
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/* 251 is reserved for NULL */
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if (length < LL(65536))
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{
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*packet++=252;
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int2store(packet,(uint) length);
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return (char*) packet+2;
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}
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if (length < LL(16777216))
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{
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*packet++=253;
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int3store(packet,(ulong) length);
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return (char*) packet+3;
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}
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*packet++=254;
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int8store(packet,length);
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return (char*) packet+8;
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}
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