4.3BSD-Reno/src/usr.bin/mail/list.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)list.c 5.14 (Berkeley) 6/1/90";
#endif /* not lint */
#include "rcv.h"
#include <ctype.h>
/*
* Mail -- a mail program
*
* Message list handling.
*/
/*
* Convert the user string of message numbers and
* store the numbers into vector.
*
* Returns the count of messages picked up or -1 on error.
*/
getmsglist(buf, vector, flags)
char *buf;
int *vector;
{
register int *ip;
register struct message *mp;
if (msgCount == 0) {
*vector = 0;
return 0;
}
if (markall(buf, flags) < 0)
return(-1);
ip = vector;
for (mp = &message[0]; mp < &message[msgCount]; mp++)
if (mp->m_flag & MMARK)
*ip++ = mp - &message[0] + 1;
*ip = 0;
return(ip - vector);
}
/*
* Mark all messages that the user wanted from the command
* line in the message structure. Return 0 on success, -1
* on error.
*/
/*
* Bit values for colon modifiers.
*/
#define CMNEW 01 /* New messages */
#define CMOLD 02 /* Old messages */
#define CMUNREAD 04 /* Unread messages */
#define CMDELETED 010 /* Deleted messages */
#define CMREAD 020 /* Read messages */
/*
* The following table describes the letters which can follow
* the colon and gives the corresponding modifier bit.
*/
struct coltab {
char co_char; /* What to find past : */
int co_bit; /* Associated modifier bit */
int co_mask; /* m_status bits to mask */
int co_equal; /* ... must equal this */
} coltab[] = {
'n', CMNEW, MNEW, MNEW,
'o', CMOLD, MNEW, 0,
'u', CMUNREAD, MREAD, 0,
'd', CMDELETED, MDELETED, MDELETED,
'r', CMREAD, MREAD, MREAD,
0, 0, 0, 0
};
static int lastcolmod;
markall(buf, f)
char buf[];
{
register char **np;
register int i;
register struct message *mp;
char *namelist[NMLSIZE], *bufp;
int tok, beg, mc, star, other, valdot, colmod, colresult;
valdot = dot - &message[0] + 1;
colmod = 0;
for (i = 1; i <= msgCount; i++)
unmark(i);
bufp = buf;
mc = 0;
np = &namelist[0];
scaninit();
tok = scan(&bufp);
star = 0;
other = 0;
beg = 0;
while (tok != TEOL) {
switch (tok) {
case TNUMBER:
number:
if (star) {
printf("No numbers mixed with *\n");
return(-1);
}
mc++;
other++;
if (beg != 0) {
if (check(lexnumber, f))
return(-1);
for (i = beg; i <= lexnumber; i++)
if (f == MDELETED || (message[i - 1].m_flag & MDELETED) == 0)
mark(i);
beg = 0;
break;
}
beg = lexnumber;
if (check(beg, f))
return(-1);
tok = scan(&bufp);
regret(tok);
if (tok != TDASH) {
mark(beg);
beg = 0;
}
break;
case TPLUS:
if (beg != 0) {
printf("Non-numeric second argument\n");
return(-1);
}
i = valdot;
do {
i++;
if (i > msgCount) {
printf("Referencing beyond EOF\n");
return(-1);
}
} while ((message[i - 1].m_flag & MDELETED) != f);
mark(i);
break;
case TDASH:
if (beg == 0) {
i = valdot;
do {
i--;
if (i <= 0) {
printf("Referencing before 1\n");
return(-1);
}
} while ((message[i - 1].m_flag & MDELETED) != f);
mark(i);
}
break;
case TSTRING:
if (beg != 0) {
printf("Non-numeric second argument\n");
return(-1);
}
other++;
if (lexstring[0] == ':') {
colresult = evalcol(lexstring[1]);
if (colresult == 0) {
printf("Unknown colon modifier \"%s\"\n",
lexstring);
return(-1);
}
colmod |= colresult;
}
else
*np++ = savestr(lexstring);
break;
case TDOLLAR:
case TUP:
case TDOT:
lexnumber = metamess(lexstring[0], f);
if (lexnumber == -1)
return(-1);
goto number;
case TSTAR:
if (other) {
printf("Can't mix \"*\" with anything\n");
return(-1);
}
star++;
break;
case TERROR:
return -1;
}
tok = scan(&bufp);
}
lastcolmod = colmod;
*np = NOSTR;
mc = 0;
if (star) {
for (i = 0; i < msgCount; i++)
if ((message[i].m_flag & MDELETED) == f) {
mark(i+1);
mc++;
}
if (mc == 0) {
printf("No applicable messages.\n");
return(-1);
}
return(0);
}
/*
* If no numbers were given, mark all of the messages,
* so that we can unmark any whose sender was not selected
* if any user names were given.
*/
if ((np > namelist || colmod != 0) && mc == 0)
for (i = 1; i <= msgCount; i++)
if ((message[i-1].m_flag & MDELETED) == f)
mark(i);
/*
* If any names were given, go through and eliminate any
* messages whose senders were not requested.
*/
if (np > namelist) {
for (i = 1; i <= msgCount; i++) {
for (mc = 0, np = &namelist[0]; *np != NOSTR; np++)
if (**np == '/') {
if (matchsubj(*np, i)) {
mc++;
break;
}
}
else {
if (matchsender(*np, i)) {
mc++;
break;
}
}
if (mc == 0)
unmark(i);
}
/*
* Make sure we got some decent messages.
*/
mc = 0;
for (i = 1; i <= msgCount; i++)
if (message[i-1].m_flag & MMARK) {
mc++;
break;
}
if (mc == 0) {
printf("No applicable messages from {%s",
namelist[0]);
for (np = &namelist[1]; *np != NOSTR; np++)
printf(", %s", *np);
printf("}\n");
return(-1);
}
}
/*
* If any colon modifiers were given, go through and
* unmark any messages which do not satisfy the modifiers.
*/
if (colmod != 0) {
for (i = 1; i <= msgCount; i++) {
register struct coltab *colp;
mp = &message[i - 1];
for (colp = &coltab[0]; colp->co_char; colp++)
if (colp->co_bit & colmod)
if ((mp->m_flag & colp->co_mask)
!= colp->co_equal)
unmark(i);
}
for (mp = &message[0]; mp < &message[msgCount]; mp++)
if (mp->m_flag & MMARK)
break;
if (mp >= &message[msgCount]) {
register struct coltab *colp;
printf("No messages satisfy");
for (colp = &coltab[0]; colp->co_char; colp++)
if (colp->co_bit & colmod)
printf(" :%c", colp->co_char);
printf("\n");
return(-1);
}
}
return(0);
}
/*
* Turn the character after a colon modifier into a bit
* value.
*/
evalcol(col)
{
register struct coltab *colp;
if (col == 0)
return(lastcolmod);
for (colp = &coltab[0]; colp->co_char; colp++)
if (colp->co_char == col)
return(colp->co_bit);
return(0);
}
/*
* Check the passed message number for legality and proper flags.
* If f is MDELETED, then either kind will do. Otherwise, the message
* has to be undeleted.
*/
check(mesg, f)
{
register struct message *mp;
if (mesg < 1 || mesg > msgCount) {
printf("%d: Invalid message number\n", mesg);
return(-1);
}
mp = &message[mesg-1];
if (f != MDELETED && (mp->m_flag & MDELETED) != 0) {
printf("%d: Inappropriate message\n", mesg);
return(-1);
}
return(0);
}
/*
* Scan out the list of string arguments, shell style
* for a RAWLIST.
*/
getrawlist(line, argv, argc)
char line[];
char **argv;
int argc;
{
register char c, *cp, *cp2, quotec;
int argn;
char linebuf[BUFSIZ];
argn = 0;
cp = line;
for (;;) {
for (; *cp == ' ' || *cp == '\t'; cp++)
;
if (*cp == '\0')
break;
if (argn >= argc - 1) {
printf(
"Too many elements in the list; excess discarded.\n");
break;
}
cp2 = linebuf;
quotec = '\0';
while ((c = *cp) != '\0') {
cp++;
if (quotec != '\0') {
if (c == quotec)
quotec = '\0';
else if (c == '\\')
switch (c = *cp++) {
case '\0':
*cp2++ = *--cp;
break;
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
c -= '0';
if (*cp >= '0' && *cp <= '7')
c = c * 8 + *cp++ - '0';
if (*cp >= '0' && *cp <= '7')
c = c * 8 + *cp++ - '0';
*cp2++ = c;
break;
case 'b':
*cp2++ = '\b';
break;
case 'f':
*cp2++ = '\f';
break;
case 'n':
*cp2++ = '\n';
break;
case 'r':
*cp2++ = '\r';
break;
case 't':
*cp2++ = '\t';
break;
case 'v':
*cp2++ = '\v';
break;
}
else if (c == '^') {
c = *cp++;
if (c == '?')
*cp2++ = '\177';
/* null doesn't show up anyway */
else if (c >= 'A' && c <= '_' ||
c >= 'a' && c <= 'z')
*cp2++ &= 037;
else
*cp2++ = *--cp;
} else
*cp2++ = c;
} else if (c == '"' || c == '\'')
quotec = c;
else if (c == ' ' || c == '\t')
break;
else
*cp2++ = c;
}
*cp2 = '\0';
argv[argn++] = savestr(linebuf);
}
argv[argn] = NOSTR;
return argn;
}
/*
* scan out a single lexical item and return its token number,
* updating the string pointer passed **p. Also, store the value
* of the number or string scanned in lexnumber or lexstring as
* appropriate. In any event, store the scanned `thing' in lexstring.
*/
struct lex {
char l_char;
char l_token;
} singles[] = {
'$', TDOLLAR,
'.', TDOT,
'^', TUP,
'*', TSTAR,
'-', TDASH,
'+', TPLUS,
'(', TOPEN,
')', TCLOSE,
0, 0
};
scan(sp)
char **sp;
{
register char *cp, *cp2;
register int c;
register struct lex *lp;
int quotec;
if (regretp >= 0) {
strcpy(lexstring, string_stack[regretp]);
lexnumber = numberstack[regretp];
return(regretstack[regretp--]);
}
cp = *sp;
cp2 = lexstring;
c = *cp++;
/*
* strip away leading white space.
*/
while (c == ' ' || c == '\t')
c = *cp++;
/*
* If no characters remain, we are at end of line,
* so report that.
*/
if (c == '\0') {
*sp = --cp;
return(TEOL);
}
/*
* If the leading character is a digit, scan
* the number and convert it on the fly.
* Return TNUMBER when done.
*/
if (isdigit(c)) {
lexnumber = 0;
while (isdigit(c)) {
lexnumber = lexnumber*10 + c - '0';
*cp2++ = c;
c = *cp++;
}
*cp2 = '\0';
*sp = --cp;
return(TNUMBER);
}
/*
* Check for single character tokens; return such
* if found.
*/
for (lp = &singles[0]; lp->l_char != 0; lp++)
if (c == lp->l_char) {
lexstring[0] = c;
lexstring[1] = '\0';
*sp = cp;
return(lp->l_token);
}
/*
* We've got a string! Copy all the characters
* of the string into lexstring, until we see
* a null, space, or tab.
* If the lead character is a " or ', save it
* and scan until you get another.
*/
quotec = 0;
if (c == '\'' || c == '"') {
quotec = c;
c = *cp++;
}
while (c != '\0') {
if (c == quotec) {
cp++;
break;
}
if (quotec == 0 && (c == ' ' || c == '\t'))
break;
if (cp2 - lexstring < STRINGLEN-1)
*cp2++ = c;
c = *cp++;
}
if (quotec && c == 0) {
fprintf(stderr, "Missing %c\n", quotec);
return TERROR;
}
*sp = --cp;
*cp2 = '\0';
return(TSTRING);
}
/*
* Unscan the named token by pushing it onto the regret stack.
*/
regret(token)
{
if (++regretp >= REGDEP)
panic("Too many regrets");
regretstack[regretp] = token;
lexstring[STRINGLEN-1] = '\0';
string_stack[regretp] = savestr(lexstring);
numberstack[regretp] = lexnumber;
}
/*
* Reset all the scanner global variables.
*/
scaninit()
{
regretp = -1;
}
/*
* Find the first message whose flags & m == f and return
* its message number.
*/
first(f, m)
{
register struct message *mp;
if (msgCount == 0)
return 0;
f &= MDELETED;
m &= MDELETED;
for (mp = dot; mp < &message[msgCount]; mp++)
if ((mp->m_flag & m) == f)
return mp - message + 1;
for (mp = dot-1; mp >= &message[0]; mp--)
if ((mp->m_flag & m) == f)
return mp - message + 1;
return 0;
}
/*
* See if the passed name sent the passed message number. Return true
* if so.
*/
matchsender(str, mesg)
char *str;
{
register char *cp, *cp2, *backup;
if (!*str) /* null string matches nothing instead of everything */
return 0;
backup = cp2 = nameof(&message[mesg - 1], 0);
cp = str;
while (*cp2) {
if (*cp == 0)
return(1);
if (raise(*cp++) != raise(*cp2++)) {
cp2 = ++backup;
cp = str;
}
}
return(*cp == 0);
}
/*
* See if the given string matches inside the subject field of the
* given message. For the purpose of the scan, we ignore case differences.
* If it does, return true. The string search argument is assumed to
* have the form "/search-string." If it is of the form "/," we use the
* previous search string.
*/
char lastscan[128];
matchsubj(str, mesg)
char *str;
{
register struct message *mp;
register char *cp, *cp2, *backup;
str++;
if (strlen(str) == 0)
str = lastscan;
else
strcpy(lastscan, str);
mp = &message[mesg-1];
/*
* Now look, ignoring case, for the word in the string.
*/
cp = str;
cp2 = hfield("subject", mp);
if (cp2 == NOSTR)
return(0);
backup = cp2;
while (*cp2) {
if (*cp == 0)
return(1);
if (raise(*cp++) != raise(*cp2++)) {
cp2 = ++backup;
cp = str;
}
}
return(*cp == 0);
}
/*
* Mark the named message by setting its mark bit.
*/
mark(mesg)
{
register int i;
i = mesg;
if (i < 1 || i > msgCount)
panic("Bad message number to mark");
message[i-1].m_flag |= MMARK;
}
/*
* Unmark the named message.
*/
unmark(mesg)
{
register int i;
i = mesg;
if (i < 1 || i > msgCount)
panic("Bad message number to unmark");
message[i-1].m_flag &= ~MMARK;
}
/*
* Return the message number corresponding to the passed meta character.
*/
metamess(meta, f)
{
register int c, m;
register struct message *mp;
c = meta;
switch (c) {
case '^':
/*
* First 'good' message left.
*/
for (mp = &message[0]; mp < &message[msgCount]; mp++)
if ((mp->m_flag & MDELETED) == f)
return(mp - &message[0] + 1);
printf("No applicable messages\n");
return(-1);
case '$':
/*
* Last 'good message left.
*/
for (mp = &message[msgCount-1]; mp >= &message[0]; mp--)
if ((mp->m_flag & MDELETED) == f)
return(mp - &message[0] + 1);
printf("No applicable messages\n");
return(-1);
case '.':
/*
* Current message.
*/
m = dot - &message[0] + 1;
if ((dot->m_flag & MDELETED) != f) {
printf("%d: Inappropriate message\n", m);
return(-1);
}
return(m);
default:
printf("Unknown metachar (%c)\n", c);
return(-1);
}
}