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/*
* LIB/MSGID.C
*
* (c)Copyright 1997, Matthew Dillon, All Rights Reserved. Refer to
* the COPYRIGHT file in the base directory of this distribution
* for specific rights granted.
*/
#include "defs.h"
Prototype char *MsgId(const char *s);
/*
* MsgId() - the message id must begin with a '<', end with a '>',
* and not contain any embedded '<' or TAB.
*/
char *
MsgId(const char *s)
{
int i;
static char *LMsgId;
if (LMsgId) {
zfree(&SysMemPool, LMsgId, strlen(LMsgId) + 1);
LMsgId = NULL;
}
if (s == NULL)
return("<>");
while (*s && (*s == ' ' || *s == '\t'))
++s;
if (*s != '<')
return("<>");
for (i = 1; s[i] && s[i] != '>'; ++i) {
if (s[i] == '<' || s[i] == '\t' || s[i] == ' ')
return("<>");
}
if (s[i] != '>')
return("<>");
++i;
if (i >= MAXMSGIDLEN)
return("<>");
LMsgId = zalloc(&SysMemPool, i + 1);
bcopy(s, LMsgId, i);
LMsgId[i] = 0;
return(LMsgId);
}
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