2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
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15 * This product includes software developed by the University of
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35 static char sccsid[] = "@(#)head.c 8.1 (Berkeley) 6/6/93";
42 * Mail -- a mail program
44 * Routines for processing and detecting headlines.
48 * See if the passed line buffer is a mail header.
49 * Return true if yes. Note the extreme pains to
50 * accomodate all funny formats.
61 if (*cp++ != 'F' || *cp++ != 'r' || *cp++ != 'o' || *cp++ != 'm' ||
64 parse(linebuf, &hl, parbuf);
65 if (hl.l_from == NOSTR || hl.l_date == NOSTR) {
66 fail(linebuf, "No from or date field");
69 if (!isdate(hl.l_date)) {
70 fail(linebuf, "Date field not legal date");
82 char linebuf[], reason[];
86 if (value("debug") == NOSTR)
88 fprintf(stderr, "\"%s\"\nnot a header because %s\n", linebuf, reason);
93 * Split a headline into its useful components.
94 * Copy the line into dynamic string space, then set
95 * pointers into the copied line in the passed headline
96 * structure. Actually, it scans.
101 register struct headline *hl;
113 * Skip over "From" first.
115 cp = nextword(cp, word);
116 cp = nextword(cp, word);
118 hl->l_from = copyin(word, &sp);
119 if (cp != NOSTR && cp[0] == 't' && cp[1] == 't' && cp[2] == 'y') {
120 cp = nextword(cp, word);
121 hl->l_tty = copyin(word, &sp);
124 hl->l_date = copyin(cp, &sp);
128 * Copy the string on the left into the string on the right
129 * and bump the right (reference) string pointer by the length.
130 * Thus, dynamically allocate space in the right string, copying
131 * the left string into it.
142 while (*cp++ = *src++)
149 * Test to see if the passed string is a ctime(3) generated
150 * date string as documented in the manual. The template
151 * below is used as the criterion of correctness.
152 * Also, we check for a possible trailing time zone using
153 * the tmztype template.
157 * 'A' An upper case char
158 * 'a' A lower case char
161 * 'O' An optional digit or space
165 char ctype[] = "Aaa Aaa O0 00:00:00 0000";
166 char tmztype[] = "Aaa Aaa O0 00:00:00 AAA 0000";
173 return cmatch(date, ctype) || cmatch(date, tmztype);
177 * Match the given string (cp) against the given template (tp).
178 * Return 1 if they match, 0 if they don't
182 register char *cp, *tp;
204 if (*cp != ' ' && !isdigit(*cp))
223 * Collect a liberal (space, tab delimited) word into the word buffer
224 * passed. Also, return a pointer to the next word following that,
225 * or NOSTR if none follow.
229 register char *wp, *wbuf;
237 while ((c = *wp++) && c != ' ' && c != '\t') {
240 while ((c = *wp++) && c != '"')
249 for (; c == ' ' || c == '\t'; c = *wp++)