2 ** m_convert.c -- parse a message range or sequence and set SELECTED
4 ** This code is Copyright (c) 2002, by the authors of nmh. See the
5 ** COPYRIGHT file in the root directory of the nmh distribution for
6 ** complete copyright information.
10 /* FIXME: This code needs rework! Rewrite as a parser? */
16 ** error codes for sequence
17 ** and message range processing
28 #define getbeyond(mp) ((mp)->hghmsg + 1)
30 static int convdir; /* convert direction */
31 static char *delimp; /* delimiter pointer */
36 static int m_conv(struct msgs *, char *, int);
37 static int attr(struct msgs *, char *);
41 addtosel(struct msgs *mp, int msg)
43 if (is_selected(mp, msg)) {
44 return; /* dont select twice */
46 set_selected(mp, msg);
48 if (mp->lowsel == 0 || msg < mp->lowsel) {
51 if (msg > mp->hghsel) {
57 m_convert(struct msgs *mp, char *name)
59 int first, last, found, range, err;
63 /* check if user defined sequence */
64 err = attr(mp, cp = name);
70 /* it had been a user-defined sequence: we're finished */
74 ** else err == 0, so continue
75 ** here we know: it is no user-defined seq
79 ** Handle the special beyond sequence, which is valid only if
80 ** ALLOW_BEYOND is set, and can appear only on its own.
81 ** Also, it is available in any folder.
83 if ((mp->msgflags & ALLOW_BEYOND) && strcmp(cp, seq_beyond)==0) {
84 addtosel(mp, getbeyond(mp));
89 ** Handle the special all sequence: replace `a' with `f-l'
91 if (strcmp(cp, seq_all)==0) {
92 cp = concat(seq_first, "-", seq_last, NULL);
95 if ((err = first = m_conv(mp, cp, FIRST)) <= 0)
103 if ((err = last = m_conv(mp, cp, LAST)) <= 0) {
107 advise(NULL, "no %s message", cp);
111 advise(NULL, "message %s doesn't exist", cp);
115 advise(NULL, "message %s out of range 1-%d",
121 advise(NULL, "bad message list %s", name);
125 advise(NULL, "folder full, no %s message",
130 advise(NULL, "no messages match specification");
139 if (first > mp->hghmsg || last < mp->lowmsg) {
141 advise(NULL, "no messages in range %s", name);
145 /* tighten the range to search */
146 if (last > mp->hghmsg)
148 if (first < mp->lowmsg)
158 } else if (*cp == '+') {
162 if ((range = atoi(bp = cp)) == 0)
168 if ((convdir > 0 && first > mp->hghmsg)
169 || (convdir < 0 && first < mp->lowmsg))
172 /* tighten the range to search */
173 if (first < mp->lowmsg)
175 if (first > mp->hghmsg)
178 for (last = first; last >= mp->lowmsg && last <= mp->hghmsg;
180 if (does_exist(mp, last) && (--range <= 0))
182 if (last < mp->lowmsg)
184 if (last > mp->hghmsg)
196 ** AFAICS, the only cases to reach here are:
198 ** But I'm not sure. --meillo
203 ** Check if message is in-range and exists.
205 if (first > mp->hghmsg || first < mp->lowmsg ||
206 !does_exist(mp, first)) {
207 if (strcmp(name, seq_cur)==0)
208 advise(NULL, "no current message");
210 /* this case seems to never be reached */
211 advise(NULL, "message %d doesn't exist",
215 last = first; /* range of 1 */
220 advise(NULL, "illegal argument delimiter: `%c'(0%o)",
226 /* Cycle through the range and select the messages that exist. */
227 for (found=0; first <= last; first++) {
228 if (does_exist(mp, first)) {
240 ** Convert the various message names to their numeric values.
250 m_conv(struct msgs *mp, char *str, int call)
253 unsigned char *cp, *bp;
254 unsigned char buf[16]; /* for reserved sequence name */
259 /* Handle an integer */
268 else if (*delimp || call == LAST)
269 return mp->hghmsg + 1;
270 else if (mp->msgflags & ALLOW_BEYOND)
276 for (bp = buf; isalpha(*cp) && (bp - buf < (int)sizeof(buf) - 1); ) {
282 /* Which one of the reserved names is it? */
283 if (strcmp(buf, seq_first)==0) {
284 return (mp->hghmsg || !(mp->msgflags & ALLOW_BEYOND) ?
285 mp->lowmsg : BADMSG);
287 } else if (strcmp(buf, seq_last)==0) {
289 return (mp->hghmsg || !(mp->msgflags & ALLOW_BEYOND) ?
290 mp->hghmsg : BADMSG);
292 } else if (strcmp(buf, seq_cur)==0) {
293 return (mp->curmsg > 0 ? mp->curmsg : BADMSG);
295 } else if (strcmp(buf, seq_prev)==0) {
297 for (i = (mp->curmsg <= mp->hghmsg) ?
298 mp->curmsg - 1 : mp->hghmsg;
299 i >= mp->lowmsg; i--) {
300 if (does_exist(mp, i))
305 } else if (strcmp(buf, seq_next)==0) {
306 for (i = (mp->curmsg >= mp->lowmsg) ?
307 mp->curmsg + 1 : mp->lowmsg;
308 i <= mp->hghmsg; i++) {
309 if (does_exist(mp, i))
320 ** Handle user defined sequences.
321 ** They can take the following forms:
332 ** (`42' being an arbitrary integer)
335 attr(struct msgs *mp, char *cp)
342 int range = 0; /* no range */
345 /* hack for "c-..." */
346 if (strcmp(cp, seq_cur)==0)
348 /* "c:..." -- this code need to be rewritten... */
349 if (strncmp(seq_cur, cp, strlen(seq_cur))==0 &&
350 cp[strlen(seq_cur)] == ':') {
354 /* Check for sequence negation */
355 if (!(dp = context_find(nsequence))) {
356 dp = seq_neg; /* use default */
358 if (*dp && strncmp(cp, dp, strlen(dp))==0) {
363 convdir = 1; /* convert direction */
365 for (dp = cp; *dp && isalnum(*dp); dp++)
379 if (strcmp(dp, seq_prev)==0) {
381 first = (mp->curmsg > 0) && (mp->curmsg <= mp->hghmsg)
382 ? mp->curmsg - 1 : mp->hghmsg;
383 } else if (strcmp(dp, seq_next)==0) {
385 first = (mp->curmsg >= mp->lowmsg)
386 ? mp->curmsg + 1 : mp->lowmsg;
387 } else if (strcmp(dp, seq_first)==0) {
389 } else if (strcmp(dp, seq_last)==0) {
401 else if (*dp == '-') {
405 if ((range = atoi(dp)) == 0)
413 *bp = '\0'; /* temporarily terminate sequence name */
416 i = seq_getnum(mp, cp); /* get index of sequence */
419 *bp = ':'; /* restore sequence name */
423 found = 0; /* count the number we select for this argument */
425 for (j = first ? first : (convdir > 0) ? mp->lowmsg : mp->hghmsg;
426 j >= mp->lowmsg && j <= mp->hghmsg; j += convdir) {
427 if (does_exist(mp, j)
428 && inverted ? !in_sequence(mp, i, j) :
429 in_sequence(mp, i, j)) {
434 ** If we have a range, then break out
435 ** once we've found enough.
437 if (range && found >= range)
447 advise(NULL, "sequence %s %s", cp, inverted ? "full" : "empty");