4.3BSD - /usr/src/new/rn/rcln.c

   1: /* $Header: rcln.c,v 4.3.1.2 85/07/23 17:39:08 lwall Exp $
   2:  *
   3:  * $Log:	rcln.c,v $
   4:  * Revision 4.3.1.2  85/07/23  17:39:08  lwall
   5:  * Oops, was freeing a static buf on -c in checkexpired.
   6:  *
   7:  * Revision 4.3.1.1  85/05/10  11:37:08  lwall
   8:  * Branch for patches.
   9:  *
  10:  * Revision 4.3  85/05/01  11:45:36  lwall
  11:  * Baseline for release with 4.3bsd.
  12:  *
  13:  */
  14: 
  15: #include "EXTERN.h"
  16: #include "common.h"
  17: #include "util.h"
  18: #include "rcstuff.h"
  19: #include "ngdata.h"
  20: #include "INTERN.h"
  21: #include "rcln.h"
  22: 
  23: void
  24: rcln_init()
  25: {
  26:     ;
  27: }
  28: 
  29: #ifdef CATCHUP
  30: void
  31: catch_up(ngx)
  32: NG_NUM ngx;
  33: {
  34:     char tmpbuf[128];
  35: 
  36: #ifdef VERBOSE
  37:     IF(verbose)
  38:     printf("\nMarking %s as all read.\n",rcline[ngx]) FLUSH;
  39:     ELSE
  40: #endif
  41: #ifdef TERSE
  42:     fputs("\nMarked read\n",stdout) FLUSH;
  43: #endif
  44:     sprintf(tmpbuf,"%s: 1-%ld", rcline[ngx],(long)getngsize(ngx));
  45:     free(rcline[ngx]);
  46:     rcline[ngx] = savestr(tmpbuf);
  47:     *(rcline[ngx] + rcnums[ngx] - 1) = '\0';
  48:     write_rc();
  49: }
  50: #endif
  51: 
  52: /* add an article number to a newsgroup, if it isn't already read */
  53: 
  54: int
  55: addartnum(artnum,ngnam)
  56: ART_NUM artnum;
  57: char *ngnam;
  58: {
  59:     register NG_NUM ngnum = find_ng(ngnam);
  60:     register char *s, *t, *maxt = Nullch;
  61:     ART_NUM min = 0, max = -1, lastnum = 0;
  62:     char *mbuf;
  63:     bool morenum;
  64: 
  65:     if (!artnum)
  66:     return 0;
  67:     if (ngnum == nextrcline || !rcnums[ngnum])
  68:                     /* not found in newsrc? */
  69:     return 0;
  70: #ifdef CACHEFIRST
  71:     if (!abs1st[ngnum])
  72: #else
  73:     if (!toread[ngnum])
  74: #endif
  75:                     /* now is a good time to trim down */
  76:     set_toread(ngnum);      /* the list due to expires if we */
  77:                     /* have not yet. */
  78: #ifdef DEBUGGING
  79:     if (artnum > ngmax[ngnum] + 10  /* allow for incoming articles */
  80:        ) {
  81:     printf("\nCorrupt Xref line!!!  %ld --> %s(1..%ld)\n",
  82:         artnum,ngnam,
  83:         ngmax[ngnum]) FLUSH;
  84:     paranoid = TRUE;        /* paranoia reigns supreme */
  85:     return -1;          /* hope this was the first newsgroup */
  86:     }
  87: #endif
  88: 
  89:     if (toread[ngnum] == TR_BOGUS)
  90:     return 0;
  91: #ifdef DEBUGGING
  92:     if (debug & DEB_XREF_MARKER) {
  93:     printf("%ld->\n%s%c%s\n",(long)artnum,rcline[ngnum],rcchar[ngnum],
  94:       rcline[ngnum] + rcnums[ngnum]) FLUSH;
  95:     }
  96: #endif
  97:     s = rcline[ngnum] + rcnums[ngnum];
  98:     while (*s == ' ') s++;      /* skip spaces */
  99:     t = s;
 100:     while (isdigit(*s) && artnum >= (min = atol(s))) {
 101:                     /* while it might have been read */
 102:     for (t = s; isdigit(*t); t++) ; /* skip number */
 103:     if (*t == '-') {        /* is it a range? */
 104:         t++;            /* skip to next number */
 105:         if (artnum <= (max = atol(t)))
 106:         return 0;       /* it is in range => already read */
 107:         lastnum = max;      /* remember it */
 108:         maxt = t;           /* remember position in case we */
 109:                     /* want to overwrite the max */
 110:         while (isdigit(*t)) t++;    /* skip second number */
 111:     }
 112:     else {
 113:         if (artnum == min)      /* explicitly a read article? */
 114:         return 0;
 115:         lastnum = min;      /* remember what the number was */
 116:         maxt = Nullch;      /* last one was not a range */
 117:     }
 118:     while (*t && !isdigit(*t)) t++; /* skip comma and any spaces */
 119:     s = t;
 120:     }
 121: 
 122:     /* we have not read it, so insert the article number before s */
 123: 
 124:     morenum = isdigit(*s);      /* will it need a comma after? */
 125:     *(rcline[ngnum] + rcnums[ngnum] - 1) = rcchar[ngnum];
 126:     mbuf = safemalloc((MEM_SIZE)(strlen(s) + (s-rcline[ngnum]) + 8));
 127:     strcpy(mbuf,rcline[ngnum]);     /* make new rc line */
 128:     if (maxt && lastnum && artnum == lastnum+1)
 129:                         /* can we just extend last range? */
 130:     t = mbuf + (maxt-rcline[ngnum]);/* then overwrite previous max */
 131:     else {
 132:     t = mbuf + (t-rcline[ngnum]);   /* point t into new line instead */
 133:     if (lastnum) {          /* have we parsed any line? */
 134:         if (!morenum)       /* are we adding to the tail? */
 135:         *t++ = ',';     /* supply comma before */
 136:         if (!maxt && artnum == lastnum+1 && *(t-1) == ',')
 137:                     /* adjacent singletons? */
 138:         *(t-1) = '-';       /* turn them into a range */
 139:     }
 140:     }
 141:     if (morenum) {          /* is there more to life? */
 142:     if (min == artnum+1) {      /* can we consolidate further? */
 143:         bool range_before = (*(t-1) == '-');
 144:         bool range_after;
 145:         char *nextmax;
 146: 
 147:         for (nextmax = s; isdigit(*nextmax); nextmax++) ;
 148:         range_after = *nextmax++ == '-';
 149: 
 150:         if (range_before)
 151:         *t = '\0';      /* artnum is redundant */
 152:         else
 153:         sprintf(t,"%ld-",(long)artnum);/* artnum will be new min */
 154: 
 155:         if (range_after)
 156:         s = nextmax;        /* *s is redundant */
 157:     /*  else
 158: 		s = s */      /* *s is new max */
 159:     }
 160:     else
 161:         sprintf(t,"%ld,",(long)artnum); /* put the number and comma */
 162:     }
 163:     else
 164:     sprintf(t,"%ld",(long)artnum);  /* put the number there (wherever) */
 165:     strcat(t,s);            /* copy remainder of line */
 166: #ifdef DEBUGGING
 167:     if (debug & DEB_XREF_MARKER) {
 168:     printf("%s\n",mbuf) FLUSH;
 169:     }
 170: #endif
 171:     free(rcline[ngnum]);
 172:     rcline[ngnum] = mbuf;       /* pull the switcheroo */
 173:     *(rcline[ngnum] + rcnums[ngnum] - 1) = '\0';
 174:                     /* wipe out : or ! */
 175:     if (toread[ngnum] > TR_NONE)    /* lest we turn unsub into bogus */
 176:     --toread[ngnum];
 177:     return 0;
 178: }
 179: 
 180: #ifdef MCHASE
 181: /* delete an article number from a newsgroup, if it is there */
 182: 
 183: void
 184: subartnum(artnum,ngnam)
 185: register ART_NUM artnum;
 186: char *ngnam;
 187: {
 188:     register NG_NUM ngnum = find_ng(ngnam);
 189:     register char *s, *t;
 190:     register ART_NUM min, max;
 191:     char *mbuf;
 192:     int curlen;
 193: 
 194:     if (!artnum)
 195:     return;
 196:     if (ngnum == nextrcline || !rcnums[ngnum])
 197:     return;             /* not found in newsrc? */
 198: #ifdef DEBUGGING
 199:     if (debug & DEB_XREF_MARKER) {
 200:     printf("%ld<-\n%s%c%s\n",(long)artnum,rcline[ngnum],rcchar[ngnum],
 201:       rcline[ngnum] + rcnums[ngnum]) FLUSH;
 202:     }
 203: #endif
 204:     s = rcline[ngnum] + rcnums[ngnum];
 205:     while (*s == ' ') s++;      /* skip spaces */
 206: 
 207:     /* a little optimization, since it is almost always the last number */
 208: 
 209:     for (t=s; *t; t++) ;        /* find end of string */
 210:     curlen = t-rcline[ngnum];
 211:     for (t--; isdigit(*t); t--) ;   /* find previous delim */
 212:     if (*t == ',' && atol(t+1) == artnum) {
 213:     *t = '\0';
 214:     if (toread[ngnum] >= TR_NONE)
 215:         ++toread[ngnum];
 216: #ifdef DEBUGGING
 217:     if (debug & DEB_XREF_MARKER)
 218:         printf("%s%c %s\n",rcline[ngnum],rcchar[ngnum],s) FLUSH;
 219: #endif
 220:     return;
 221:     }
 222: 
 223:     /* not the last number, oh well, we may need the length anyway */
 224: 
 225:     while (isdigit(*s) && artnum >= (min = atol(s))) {
 226:                     /* while it might have been read */
 227:     for (t = s; isdigit(*t); t++) ; /* skip number */
 228:     if (*t == '-') {        /* is it a range? */
 229:         t++;            /* skip to next number */
 230:         max = atol(t);
 231:         while (isdigit(*t)) t++;    /* skip second number */
 232:         if (artnum <= max) {
 233:                     /* it is in range => already read */
 234:         if (artnum == min) {
 235:             min++;
 236:             artnum = 0;
 237:         }
 238:         else if (artnum == max) {
 239:             max--;
 240:             artnum = 0;
 241:         }
 242:         *(rcline[ngnum] + rcnums[ngnum] - 1) = rcchar[ngnum];
 243:         mbuf = safemalloc((MEM_SIZE)(curlen + (artnum?15:2)));
 244:         *s = '\0';
 245:         strcpy(mbuf,rcline[ngnum]); /* make new rc line */
 246:         s = mbuf + (s-rcline[ngnum]);
 247:                     /* point s into mbuf now */
 248:         if (artnum) {       /* split into two ranges? */
 249:             prange(s,min,artnum-1);
 250:             s += strlen(s);
 251:             *s++ = ',';
 252:             prange(s,artnum+1,max);
 253:         }
 254:         else            /* only one range */
 255:             prange(s,min,max);
 256:         s += strlen(s);
 257:         strcpy(s,t);        /* copy remainder over */
 258: #ifdef DEBUGGING
 259:         if (debug & DEB_XREF_MARKER) {
 260:             printf("%s\n",mbuf) FLUSH;
 261:         }
 262: #endif
 263:         free(rcline[ngnum]);
 264:         rcline[ngnum] = mbuf;   /* pull the switcheroo */
 265:         *(rcline[ngnum] + rcnums[ngnum] - 1) = '\0';
 266:                     /* wipe out : or ! */
 267:         if (toread[ngnum] >= TR_NONE)
 268:             ++toread[ngnum];
 269:         return;
 270:         }
 271:     }
 272:     else {
 273:         if (artnum == min) {    /* explicitly a read article? */
 274:         if (*t == ',')      /* pick a comma, any comma */
 275:             t++;
 276:         else if (s[-1] == ',')
 277:             s--;
 278:         else if (s[-2] == ',')  /* (in case of space) */
 279:             s -= 2;
 280:         strcpy(s,t);        /* no need to realloc */
 281:         if (toread[ngnum] >= TR_NONE)
 282:             ++toread[ngnum];
 283: #ifdef DEBUGGING
 284:         if (debug & DEB_XREF_MARKER) {
 285:             printf("%s%c%s\n",rcline[ngnum],rcchar[ngnum],
 286:               rcline[ngnum] + rcnums[ngnum]) FLUSH;
 287:         }
 288: #endif
 289:         return;
 290:         }
 291:     }
 292:     while (*t && !isdigit(*t)) t++; /* skip comma and any spaces */
 293:     s = t;
 294:     }
 295: }
 296: 
 297: void
 298: prange(where,min,max)
 299: char *where;
 300: ART_NUM min,max;
 301: {
 302:     if (min == max)
 303:     sprintf(where,"%ld",(long)min);
 304:     else
 305:     sprintf(where,"%ld-%ld",(long)min,(long)max);
 306: }
 307: #endif
 308: 
 309: /* calculate the number of unread articles for a newsgroup */
 310: 
 311: void
 312: set_toread(ngnum)
 313: register NG_NUM ngnum;
 314: {
 315:     register char *s, *c, *h;
 316:     char tmpbuf[64], *mybuf = tmpbuf;
 317:     char *nums;
 318:     int length;
 319: #ifdef CACHEFIRST
 320:     bool virgin_ng = (!abs1st[ngnum]);
 321: #endif
 322:     ART_NUM ngsize = getngsize(ngnum);
 323:     ART_NUM unread = ngsize;
 324:     ART_NUM newmax;
 325: 
 326: #ifdef DEBUGGING
 327:     ngmax[ngnum] = ngsize;      /* for checking out-of-range Xrefs */
 328: #endif
 329:     if (ngsize == TR_BOGUS) {
 330:     printf("Warning!  Bogus newsgroup: %s\n",rcline[ngnum]) FLUSH;
 331:     paranoid = TRUE;
 332:     toread[ngnum] = TR_BOGUS;
 333:     return;
 334:     }
 335: #ifdef CACHEFIRST
 336:     if (virgin_ng)
 337: #else
 338:     if (!toread[ngnum])
 339: #endif
 340:     {
 341:     sprintf(tmpbuf," 1-%ld",(long)ngsize);
 342:     if (strNE(tmpbuf,rcline[ngnum]+rcnums[ngnum]))
 343:         checkexpired(ngnum,ngsize); /* this might realloc rcline */
 344:     }
 345:     nums = rcline[ngnum]+rcnums[ngnum];
 346:     length = strlen(nums);
 347:     if (length >= 60)
 348:     mybuf = safemalloc((MEM_SIZE)(length+5));
 349:     strcpy(mybuf,nums);
 350:     mybuf[length++] = ',';
 351:     mybuf[length] = '\0';
 352:     for (s = mybuf; isspace(*s); s++)
 353:         ;
 354:     for ( ; (c = index(s,',')) != Nullch ; s = ++c) {
 355:                     /* for each range */
 356:     *c = '\0';          /* keep index from running off */
 357:     if ((h = index(s,'-')) != Nullch)   /* find - in range, if any */
 358:         unread -= (newmax = atol(h+1)) - atol(s) + 1;
 359:     else if (newmax = atol(s))
 360:         unread--;       /* recalculate length */
 361:     if (newmax > ngsize) {  /* paranoia check */
 362:         unread = -1;
 363:         break;
 364:     }
 365:     }
 366:     if (unread >= 0)        /* reasonable number? */
 367:     toread[ngnum] = (ART_UNREAD)unread;
 368:                     /* remember how many are left */
 369:     else {              /* SOMEONE RESET THE NEWSGROUP!!! */
 370:     toread[ngnum] = (ART_UNREAD)ngsize;
 371:                     /* assume nothing carried over */
 372:     printf("Warning!  Somebody reset %s--assuming nothing read.\n",
 373:         rcline[ngnum]) FLUSH;
 374:     *(rcline[ngnum] + rcnums[ngnum]) = '\0';
 375:     paranoid = TRUE;        /* enough to make a guy paranoid */
 376:     }
 377:     if (mybuf != tmpbuf)
 378:     free(mybuf);
 379:     if (rcchar[ngnum] == NEGCHAR)
 380:     toread[ngnum] = TR_UNSUB;
 381: }
 382: 
 383: /* make sure expired articles are marked as read */
 384: 
 385: void
 386: checkexpired(ngnum,ngsize)
 387: register NG_NUM ngnum;
 388: ART_NUM ngsize;
 389: {
 390:     register ART_NUM a1st = getabsfirst(ngnum,ngsize);
 391:     register char *s, *t;
 392:     register ART_NUM num, lastnum = 0;
 393:     char *mbuf, *newnum;
 394: 
 395:     if (a1st<=1)
 396:     return;
 397: #ifdef DEBUGGING
 398:     if (debug & DEB_XREF_MARKER) {
 399:     printf("1-%ld->\n%s%c%s\n",(long)(a1st-1),rcline[ngnum],rcchar[ngnum],
 400:       rcline[ngnum] + rcnums[ngnum]) FLUSH;
 401:     }
 402: #endif
 403:     for (s = rcline[ngnum] + rcnums[ngnum]; isspace(*s); s++);
 404:     while (*s && (num = atol(s)) <= a1st) {
 405:     while (isdigit(*s)) s++;
 406:     while (*s && !isdigit(*s)) s++;
 407:     lastnum = num;
 408:     }
 409:     if (*s) {
 410:     if (s[-1] == '-') {         /* landed in a range? */
 411:         if (lastnum != 1)
 412:         sprintf(rcline[ngnum]+rcnums[ngnum]," 1-%s",s);
 413:         goto ret;
 414:     }
 415:     }
 416:     /* s now points to what should follow first range */
 417:     if (s - rcline[ngnum] > rcnums[ngnum] + 10)
 418:     mbuf = rcline[ngnum];
 419:     else {
 420:     mbuf = safemalloc((MEM_SIZE)(rcnums[ngnum] + strlen(s) + 10));
 421:     strcpy(mbuf,rcline[ngnum]);
 422:     }
 423:     newnum = t = mbuf+rcnums[ngnum];
 424:     sprintf(t," 1-%ld",(long)(a1st - (lastnum != a1st)));
 425:     if (*s) {
 426:     t += strlen(t);
 427:     *t++ = ',';
 428:     strcpy(t,s);
 429:     }
 430:     if (mbuf == rcline[ngnum]) {
 431:     rcline[ngnum] = saferealloc(rcline[ngnum],
 432:         (MEM_SIZE)(rcnums[ngnum] + strlen(newnum) + 1));
 433:     }
 434:     else {
 435:     if (!checkflag)
 436:         free(rcline[ngnum]);
 437:     rcline[ngnum] = mbuf;
 438:     }
 439: 
 440: ret:;       /* semicolon in case DEBUGGING undefined */
 441: #ifdef DEBUGGING
 442:     if (debug & DEB_XREF_MARKER) {
 443:     printf("%s%c%s\n",rcline[ngnum],rcchar[ngnum],
 444:       rcline[ngnum] + rcnums[ngnum]) FLUSH;
 445:     }
 446: #endif
 447: }

Defined functions