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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1995 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "rcv.h"
/*
* mailx -- a modified version of a University of California at Berkeley
* mail program
*
* Routines for processing and detecting headlines.
*/
static char *copyin(char src[], char **space);
static char *nextword(char wp[], char wbuf[]);
/*
* See if the passed line buffer is a mail header.
* Return true if yes.
*/
int
ishead(char linebuf[])
{
register char *cp;
struct headline hl;
char parbuf[BUFSIZ];
cp = linebuf;
if (strncmp("From ", cp, 5) != 0)
return(0);
parse(cp, &hl, parbuf);
if (hl.l_from == NOSTR) {
return(0);
}
return(1);
}
/*
* Split a headline into its useful components.
* Copy the line into dynamic string space, then set
* pointers into the copied line in the passed headline
* structure. Actually, it scans.
*/
void
parse(char line[], struct headline *hl, char pbuf[])
{
register char *cp, *dp;
char *sp;
char word[LINESIZE];
hl->l_from = NOSTR;
hl->l_date = NOSTR;
cp = line;
sp = pbuf;
/*
* Skip the first "word" of the line, which should be "From"
* anyway.
*/
cp = nextword(cp, word);
dp = nextword(cp, word);
if (!equal(word, ""))
hl->l_from = copyin(word, &sp);
if (dp != NOSTR)
hl->l_date = copyin(dp, &sp);
}
/*
* Copy the string on the left into the string on the right
* and bump the right (reference) string pointer by the length.
* Thus, dynamically allocate space in the right string, copying
* the left string into it.
*/
static char *
copyin(char src[], char **space)
{
register char *cp, *top;
register int s;
s = strlen(src);
cp = *space;
top = cp;
strcpy(cp, src);
cp += s + 1;
*space = cp;
return(top);
}
/*
* Collect a liberal (space, tab delimited) word into the word buffer
* passed. Also, return a pointer to the next word following that,
* or NOSTR if none follow.
*/
static char *
nextword(char wp[], char wbuf[])
{
register char *cp, *cp2;
if ((cp = wp) == NOSTR) {
copy("", wbuf);
return(NOSTR);
}
cp2 = wbuf;
while (!any(*cp, " \t") && *cp != '\0')
if (*cp == '"') {
*cp2++ = *cp++;
while (*cp != '\0' && *cp != '"')
*cp2++ = *cp++;
if (*cp == '"')
*cp2++ = *cp++;
} else
*cp2++ = *cp++;
*cp2 = '\0';
while (any(*cp, " \t"))
cp++;
if (*cp == '\0')
return(NOSTR);
return(cp);
}
/*
* Copy str1 to str2, return pointer to null in str2.
*/
char *
copy(char *str1, char *str2)
{
register char *s1, *s2;
s1 = str1;
s2 = str2;
while (*s1)
*s2++ = *s1++;
*s2 = 0;
return(s2);
}
/*
* Is ch any of the characters in str?
*/
int
any(int ch, char *str)
{
register char *f;
int c;
f = str;
c = ch;
while (*f)
if (c == *f++)
return(1);
return(0);
}
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