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- /*
- * Copyright (c) 1980 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley. The name of the
- * University may not 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)list.c 5.13 (Berkeley) 4/1/89";
- #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);
- }
- }
-