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String read/write functions

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Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 236
This commit is contained in:
Simon Howard 2006-01-01 23:51:41 +00:00
parent 75270ad54a
commit 0caa1149ff
2 changed files with 60 additions and 2 deletions
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55
src/net_packet.c
View file

@ -1,7 +1,7 @@
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id: net_packet.c 229 2005-10-30 19:56:15Z fraggle $
// $Id: net_packet.c 236 2006-01-01 23:51:41Z fraggle $
//
// Copyright(C) 2005 Simon Howard
//
@ -21,6 +21,9 @@
// 02111-1307, USA.
//
// $Log$
// Revision 1.2 2006/01/01 23:51:41 fraggle
// String read/write functions
//
// Revision 1.1 2005/10/30 19:56:15 fraggle
// Add foundation code for the new networking system
//
@ -121,6 +124,38 @@ boolean NET_ReadInt32(net_packet_t *packet, unsigned int *data)
return true;
}
// Read a string from the packet. Returns NULL if a terminating
// NUL character was not found before the end of the packet.
char *NET_ReadString(net_packet_t *packet)
{
char *start;
start = (char *) packet->data + packet->pos;
// Search forward for a NUL character
while (packet->pos < packet->len && packet->data[packet->pos] != '\0')
{
++packet->pos;
}
if (packet->pos >= packet->len)
{
// Reached the end of the packet
return NULL;
}
// packet->data[packet->pos] == '\0': We have reached a terminating
// NULL. Skip past this NULL and continue reading immediately
// after it.
++packet->pos;
return start;
}
// Dynamically increases the size of a packet
static void NET_IncreasePacket(net_packet_t *packet)
@ -185,6 +220,24 @@ void NET_WriteInt32(net_packet_t *packet, unsigned int i)
packet->len += 4;
}
void NET_WriteString(net_packet_t *packet, char *string)
{
byte *p;
// Increase the packet size until large enough to hold the string
while (packet->len + strlen(string) + 1 > packet->alloced)
{
NET_IncreasePacket(packet);
}
p = packet->data + packet->len;
strcpy((char *) p, string);
packet->len += strlen(string) + 1;
}

7
src/net_packet.h
View file

@ -1,7 +1,7 @@
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id: net_packet.h 229 2005-10-30 19:56:15Z fraggle $
// $Id: net_packet.h 236 2006-01-01 23:51:41Z fraggle $
//
// Copyright(C) 2005 Simon Howard
//
@ -21,6 +21,9 @@
// 02111-1307, USA.
//
// $Log$
// Revision 1.2 2006/01/01 23:51:41 fraggle
// String read/write functions
//
// Revision 1.1 2005/10/30 19:56:15 fraggle
// Add foundation code for the new networking system
//
@ -41,9 +44,11 @@ void NET_FreePacket(net_packet_t *packet);
boolean NET_ReadInt8(net_packet_t *packet, unsigned int *data);
boolean NET_ReadInt16(net_packet_t *packet, unsigned int *data);
boolean NET_ReadInt32(net_packet_t *packet, unsigned int *data);
char *NET_ReadString(net_packet_t *packet);
void NET_WriteInt8(net_packet_t *packet, unsigned int i);
void NET_WriteInt16(net_packet_t *packet, unsigned int i);
void NET_WriteInt32(net_packet_t *packet, unsigned int i);
void NET_WriteString(net_packet_t *packet, char *string);
#endif /* #ifndef NET_PACKET_H */