-
- return (*b == 0);
-}
-
-
-/*
- * seekadrx() is tricky. We want to cover both UUCP-style and ARPA-style
- * addresses, so for each list of addresses we see if we can find some
- * character to give us a hint.
- */
-
-
-#define CHKADR 0 /* undertermined address style */
-#define UNIXDR 1 /* UNIX-style address */
-#define ARPADR 2 /* ARPAnet-style address */
-
-
-static char *punctuators = ";<>.()[]";
-static char *vp = NULL;
-static char *tp = NULL;
-
-static struct adrx adrxs1;
-
-
-struct adrx *
-seekadrx (char *addrs)
-{
- static int state = CHKADR;
- register char *cp;
- register struct adrx *adrxp;
-
- if (state == CHKADR)
- for (state = UNIXDR, cp = addrs; *cp; cp++)
- if (strchr(punctuators, *cp)) {
- state = ARPADR;
- break;
- }
-
- switch (state) {
- case UNIXDR:
- adrxp = uucpadrx (addrs);
- break;
-
- case ARPADR:
- default:
- adrxp = getadrx (addrs);
- break;
- }
-
- if (adrxp == NULL)
- state = CHKADR;
-
- return adrxp;
-}
-
-
-/*
- * uucpadrx() implements a partial UUCP-style address parser. It's based
- * on the UUCP notion that addresses are separated by spaces or commas.
- */
-
-
-struct adrx *
-uucpadrx (char *addrs)
-{
- register char *cp, *wp, *xp, *yp, *zp;
- register struct adrx *adrxp = &adrxs1;
-
- if (vp == NULL) {
- vp = tp = getcpy (addrs);
- compress (addrs, vp);
- }
- else
- if (tp == NULL) {
- free (vp);
- vp = NULL;
- return NULL;
- }
-
- for (cp = tp; isspace (*cp); cp++)
- continue;
- if (*cp == 0) {
- free (vp);
- vp = tp = NULL;
- return NULL;
- }
-
- if ((wp = strchr(cp, ',')) == NULL) {
- if ((wp = strchr(cp, ' ')) != NULL) {
- xp = wp;
- while (isspace (*xp))
- xp++;
- if (*xp != 0 && isat (--xp)) {
- yp = xp + 4;
- while (isspace (*yp))
- yp++;
- if (*yp != 0) {
- if ((zp = strchr(yp, ' ')) != NULL)
- *zp = 0, tp = ++zp;
- else
- tp = NULL;
- }
- else
- *wp = 0, tp = ++wp;
- }
- else
- *wp = 0, tp = ++wp;
- }
- else
- tp = NULL;
- }
- else
- *wp = 0, tp = ++wp;
-
- if (adrxp->text)
- free (adrxp->text);
- adrxp->text = getcpy (cp);
- adrxp->mbox = cp;
- adrxp->host = adrxp->path = NULL;
- if ((wp = strrchr(cp, '@')) != NULL) {
- *wp++ = 0;
- adrxp->host = *wp ? wp : NULL;
- }
- else
- for (wp = cp + strlen (cp) - 4; wp >= cp; wp--)
- if (isat (wp)) {
- *wp++ = 0;
- adrxp->host = wp + 3;
- }
-
- adrxp->pers = adrxp->grp = adrxp->note = adrxp->err = NULL;
- adrxp->ingrp = 0;
-
- return adrxp;
-}
-
-
-static void
-compress (char *fp, char *tp)
-{
- register char c, *cp;
-
- for (c = ' ', cp = tp; (*tp = *fp++) != 0;)
- if (isspace (*tp)) {
- if (c != ' ')
- *tp++ = c = ' ';
- }
- else
- c = *tp++;
-
- if (c == ' ' && cp < tp)
- *--tp = 0;
-}
-
-
-static int
-isat (char *p)
-{
- return (strncmp (p, " AT ", 4)
- && strncmp (p, " At ", 4)
- && strncmp (p, " aT ", 4)
- && strncmp (p, " at ", 4) ? FALSE : TRUE);