message.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Message, message array, getmsglist(), and related operations.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 - 2016 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   6  */
   7 /*
   8  * Copyright (c) 1980, 1993
   9  *      The Regents of the University of California.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35 #undef n_FILE
  36 #define n_FILE message
  37
  38 #ifndef HAVE_AMALGAMATION
  39 # include "nail.h"
  40 #endif
  41
  42 /* Token values returned by the scanner used for argument lists.
  43  * Also, sizes of scanner-related things */
  44 enum a_message_token{
  45    a_MESSAGE_T_EOL,     /* End of the command line */
  46    a_MESSAGE_T_NUMBER,  /* Message number */
  47    a_MESSAGE_T_MINUS,   /* - */
  48    a_MESSAGE_T_STRING,  /* A string (possibly containing -) */
  49    a_MESSAGE_T_DOT,     /* . */
  50    a_MESSAGE_T_UP,      /* ^ */
  51    a_MESSAGE_T_DOLLAR,  /* $ */
  52    a_MESSAGE_T_ASTER,   /* * */
  53    a_MESSAGE_T_OPEN,    /* ( */
  54    a_MESSAGE_T_CLOSE,   /* ) */
  55    a_MESSAGE_T_PLUS,    /* + */
  56    a_MESSAGE_T_COMMA,   /* , */
  57    a_MESSAGE_T_SEMI,    /* ; */
  58    a_MESSAGE_T_BACK,    /* ` */
  59    a_MESSAGE_T_ERROR    /* Lexical error */
  60 };
  61
  62 enum a_message_idfield{
  63    a_MESSAGE_ID_REFERENCES,
  64    a_MESSAGE_ID_IN_REPLY_TO
  65 };
  66
  67 enum a_message_state{
  68    a_MESSAGE_S_NEW = 1<<0,
  69    a_MESSAGE_S_OLD = 1<<1,
  70    a_MESSAGE_S_UNREAD = 1<<2,
  71    a_MESSAGE_S_DELETED = 1<<3,
  72    a_MESSAGE_S_READ = 1<<4,
  73    a_MESSAGE_S_FLAG = 1<<5,
  74    a_MESSAGE_S_ANSWERED = 1<<6,
  75    a_MESSAGE_S_DRAFT = 1<<7,
  76    a_MESSAGE_S_SPAM = 1<<8,
  77    a_MESSAGE_S_SPAMUNSURE = 1<<9
  78 };
  79
  80 struct a_message_coltab{
  81    char mco_char; /* What to find past : */
  82    ui8_t mco__dummy[3];
  83    int mco_bit;   /* Associated modifier bit */
  84    int mco_mask;  /* m_status bits to mask */
  85    int mco_equal; /* ... must equal this */
  86 };
  87
  88 struct a_message_lex{
  89    char ml_char;
  90    ui8_t ml_token;
  91 };
  92
  93 static struct a_message_coltab const a_message_coltabs[] = {
  94    {'n', {0,}, a_MESSAGE_S_NEW, MNEW, MNEW},
  95    {'o', {0,}, a_MESSAGE_S_OLD, MNEW, 0},
  96    {'u', {0,}, a_MESSAGE_S_UNREAD, MREAD, 0},
  97    {'d', {0,}, a_MESSAGE_S_DELETED, MDELETED, MDELETED},
  98    {'r', {0,}, a_MESSAGE_S_READ, MREAD, MREAD},
  99    {'f', {0,}, a_MESSAGE_S_FLAG, MFLAGGED, MFLAGGED},
 100    {'a', {0,}, a_MESSAGE_S_ANSWERED, MANSWERED, MANSWERED},
 101    {'t', {0,}, a_MESSAGE_S_DRAFT, MDRAFTED, MDRAFTED},
 102    {'s', {0,}, a_MESSAGE_S_SPAM, MSPAM, MSPAM},
 103    {'S', {0,}, a_MESSAGE_S_SPAMUNSURE, MSPAMUNSURE, MSPAMUNSURE}
 104 };
 105
 106 static struct a_message_lex const a_message_singles[] = {
 107    {'$', a_MESSAGE_T_DOLLAR},
 108    {'.', a_MESSAGE_T_DOT},
 109    {'^', a_MESSAGE_T_UP},
 110    {'*', a_MESSAGE_T_ASTER},
 111    {'-', a_MESSAGE_T_MINUS},
 112    {'+', a_MESSAGE_T_PLUS},
 113    {'(', a_MESSAGE_T_OPEN},
 114    {')', a_MESSAGE_T_CLOSE},
 115    {',', a_MESSAGE_T_COMMA},
 116    {';', a_MESSAGE_T_SEMI},
 117    {'`', a_MESSAGE_T_BACK}
 118 };
 119
 120 /* Slots in ::message */
 121 static size_t a_message_mem_space;
 122
 123 /* Mark entire threads */
 124 static bool_t a_message_threadflag;
 125
 126 /* :d on its way HACK TODO */
 127 static bool_t a_message_list_saw_d, a_message_list_last_saw_d;
 128
 129 /* String from a_MESSAGE_T_STRING, scan() */
 130 static struct str a_message_lexstr;
 131 /* Number of a_MESSAGE_T_NUMBER from scan() */
 132 static int a_message_lexno;
 133
 134 /* Lazy load message header fields */
 135 static enum okay a_message_get_header(struct message *mp);
 136
 137 /* Append, taking care of resizes TODO vector */
 138 static char **a_message_add_to_namelist(char ***namelist, size_t *nmlsize,
 139                char **np, char *string);
 140
 141 /* Mark all messages that the user wanted from the command line in the message
 142  * structure.  Return 0 on success, -1 on error */
 143 static int a_message_markall(char *buf, int f);
 144
 145 /* Turn the character after a colon modifier into a bit value */
 146 static int a_message_evalcol(int col);
 147
 148 /* Check the passed message number for legality and proper flags.  Unless f is
 149  * MDELETED the message has to be undeleted */
 150 static bool_t a_message_check(int mno, int f);
 151
 152 /* Scan out a single lexical item and return its token number, updating the
 153  * string pointer passed *sp.  Also, store the value of the number or string
 154  * scanned in a_message_lexno or a_message_lexstr as appropriate.
 155  * In any event, store the scanned "thing" in a_message_lexstr.
 156  * Returns the token as a negative number when we also saw & to mark a thread */
 157 static int a_message_scan(char **sp);
 158
 159 /* See if the passed name sent the passed message */
 160 static bool_t a_message_match_sender(struct message *mp, char const *str,
 161                bool_t allnet);
 162
 163 /* Check whether the given message-id or references match */
 164 static bool_t a_message_match_mid(struct message *mp, char const *id,
 165                enum a_message_idfield idfield);
 166
 167 /* See if the given string matches.
 168  * For the purpose of the scan, we ignore case differences.
 169  * This is the engine behind the "/" search */
 170 static bool_t a_message_match_dash(struct message *mp, char const *str);
 171
 172 /* See if the given search expression matches.
 173  * For the purpose of the scan, we ignore case differences.
 174  * This is the engine behind the "@[..@].." search */
 175 static bool_t a_message_match_at(struct message *mp, struct search_expr *sep);
 176
 177 /* Unmark the named message */
 178 static void a_message_unmark(int mesg);
 179
 180 /* Return the message number corresponding to the passed meta character */
 181 static int a_message_metamess(int meta, int f);
 182
 183 /* Helper for mark(): self valid, threading enabled */
 184 static void a_message__threadmark(struct message *self, int f);
 185
 186 static enum okay
 187 a_message_get_header(struct message *mp){
 188    enum okay rv;
 189    NYD2_ENTER;
 190    UNUSED(mp);
 191
 192    switch(mb.mb_type){
 193    case MB_FILE:
 194    case MB_MAILDIR:
 195       rv = OKAY;
 196       break;
 197 #ifdef HAVE_POP3
 198    case MB_POP3:
 199       rv = pop3_header(mp);
 200       break;
 201 #endif
 202    case MB_VOID:
 203    default:
 204       rv = STOP;
 205       break;
 206    }
 207    NYD2_LEAVE;
 208    return rv;
 209 }
 210
 211 static char **
 212 a_message_add_to_namelist(char ***namelist, size_t *nmlsize, char **np,
 213       char *string){
 214    size_t idx;
 215    NYD2_ENTER;
 216
 217    if((idx = PTR2SIZE(np - *namelist)) >= *nmlsize){
 218       *namelist = srealloc(*namelist, (*nmlsize += 8) * sizeof *np);
 219       np = &(*namelist)[idx];
 220    }
 221    *np++ = string;
 222    NYD2_LEAVE;
 223    return np;
 224 }
 225
 226 static int
 227 a_message_markall(char *buf, int f){
 228    struct message *mp, *mx;
 229    enum a_message_idfield idfield;
 230    size_t j, nmlsize;
 231    char const *id;
 232    char **np, **nq, **namelist, *bufp, *cp;
 233    int i, valdot, beg, colmod, tok, colresult;
 234    enum{
 235       a_NONE = 0,
 236       a_ALLNET = 1u<<0,    /* Must be TRU1 */
 237       a_ALLOC = 1u<<1,     /* Have allocated something */
 238       a_THREADED = 1u<<2,
 239       a_ERROR = 1u<<3,
 240       a_ANY = 1u<<4,       /* Have marked just ANY */
 241       a_RANGE = 1u<<5,     /* Seen dash, await close */
 242       a_ASTER = 1u<<8,
 243       a_TOPEN = 1u<<9,     /* ( used (and didn't match) */
 244       a_TBACK = 1u<<10,    /* ` used (and didn't match) */
 245       a_TMP = 1u<<15
 246    } flags;
 247    NYD_ENTER;
 248    n_LCTA((ui32_t)a_ALLNET == (ui32_t)TRU1,
 249       "Constant is converted to bool_t via AND, thus");
 250
 251    /* Update message array: clear MMARK but remember its former state for `.
 252     * An empty selector input is identical to * asterisk */
 253    for(i = msgCount; i-- > 0;){
 254       enum mflag mf;
 255
 256       mf = (mp = &message[i])->m_flag;
 257       if(mf & MMARK)
 258          mf |= MOLDMARK;
 259       else
 260          mf &= ~MOLDMARK;
 261       mf &= ~MMARK;
 262       mp->m_flag = mf;
 263    }
 264
 265    /* Strip all leading WS from user buffer */
 266    while(blankspacechar(*buf))
 267       ++buf;
 268    /* If there is no input buffer, we are done! */
 269    if(buf[0] == '\0'){
 270       flags = a_NONE;
 271       goto jleave;
 272    }
 273
 274    UNINIT(beg, 0);
 275    UNINIT(idfield, a_MESSAGE_ID_REFERENCES);
 276    a_message_threadflag = FAL0;
 277    a_message_lexstr.s = ac_alloc(a_message_lexstr.l = 2 * strlen(buf) +1);
 278    np = namelist = smalloc((nmlsize = 8) * sizeof *namelist); /* TODO vector */
 279    bufp = buf;
 280    valdot = (int)PTR2SIZE(dot - message + 1);
 281    colmod = 0;
 282    id = NULL;
 283    flags = a_ALLOC | (mb.mb_threaded ? a_THREADED : 0);
 284
 285    while((tok = a_message_scan(&bufp)) != a_MESSAGE_T_EOL){
 286       if((a_message_threadflag = (tok < 0)))
 287          tok &= INT_MAX;
 288
 289       switch(tok){
 290       case a_MESSAGE_T_NUMBER:
 291          pstate |= PS_MSGLIST_GABBY;
 292 jnumber:
 293          if(!a_message_check(a_message_lexno, f))
 294             goto jerr;
 295
 296          if(flags & a_RANGE){
 297             flags ^= a_RANGE;
 298
 299             if(!(flags & a_THREADED)){
 300                if(beg < a_message_lexno)
 301                   i = beg;
 302                else{
 303                   i = a_message_lexno;
 304                   a_message_lexno = beg;
 305                }
 306
 307                for(; i <= a_message_lexno; ++i){
 308                   mp = &message[i - 1];
 309                   if(!(mp->m_flag & MHIDDEN) &&
 310                          (f == MDELETED || !(mp->m_flag & MDELETED))){
 311                      mark(i, f);
 312                      flags |= a_ANY;
 313                   }
 314                }
 315             }else{
 316                /* TODO threaded ranges are a mess */
 317                enum{
 318                   a_T_NONE,
 319                   a_T_HOT = 1u<<0,
 320                   a_T_DIR_PREV = 1u<<1
 321                } tf;
 322                int i_base;
 323
 324                if(beg < a_message_lexno)
 325                   i = beg;
 326                else{
 327                   i = a_message_lexno;
 328                   a_message_lexno = beg;
 329                }
 330
 331                i_base = i;
 332                tf = a_T_NONE;
 333 jnumber__thr:
 334                for(;;){
 335                   mp = &message[i - 1];
 336                   if(!(mp->m_flag & MHIDDEN) &&
 337                          (f == MDELETED || !(mp->m_flag & MDELETED))){
 338                      if(tf & a_T_HOT){
 339                         mark(i, f);
 340                         flags |= a_ANY;
 341                      }
 342                   }
 343
 344                   /* We may have reached the endpoint.  If we were still
 345                    * detecting the direction to search for it, restart.
 346                    * Otherwise finished */
 347                   if(i == a_message_lexno){ /* XXX */
 348                      if(!(tf & a_T_HOT)){
 349                         tf |= a_T_HOT;
 350                         i = i_base;
 351                         goto jnumber__thr;
 352                      }
 353                      break;
 354                   }
 355
 356                   mx = (tf & a_T_DIR_PREV) ? prev_in_thread(mp)
 357                         : next_in_thread(mp);
 358                   if(mx == NULL){
 359                      /* We anyway have failed to reach the endpoint in this
 360                       * direction;  if we already switched that, report error */
 361                      if(!(tf & a_T_DIR_PREV)){
 362                         tf |= a_T_DIR_PREV;
 363                         i = i_base;
 364                         goto jnumber__thr;
 365                      }
 366                      id = N_("Range crosses multiple threads\n");
 367                      goto jerrmsg;
 368                   }
 369                   i = (int)PTR2SIZE(mx - message + 1);
 370                }
 371             }
 372
 373             beg = 0;
 374          }else{
 375             /* Could be an inclusive range? */
 376             if(bufp[0] == '-'){
 377                ++bufp;
 378                beg = a_message_lexno;
 379                flags |= a_RANGE;
 380             }else{
 381                mark(a_message_lexno, f);
 382                flags |= a_ANY;
 383             }
 384          }
 385          break;
 386       case a_MESSAGE_T_PLUS:
 387          pstate &= ~PS_MSGLIST_DIRECT;
 388          pstate |= PS_MSGLIST_GABBY;
 389          i = valdot;
 390          do{
 391             if(flags & a_THREADED){
 392                mx = next_in_thread(&message[i - 1]);
 393                i = mx ? (int)PTR2SIZE(mx - message + 1) : msgCount + 1;
 394             }else
 395                ++i;
 396             if(i > msgCount){
 397                id = N_("Referencing beyond last message\n");
 398                goto jerrmsg;
 399             }
 400          }while(message[i - 1].m_flag == MHIDDEN ||
 401             (message[i - 1].m_flag & MDELETED) != (unsigned)f);
 402          a_message_lexno = i;
 403          goto jnumber;
 404       case a_MESSAGE_T_MINUS:
 405          pstate &= ~PS_MSGLIST_DIRECT;
 406          pstate |= PS_MSGLIST_GABBY;
 407          i = valdot;
 408          do{
 409             if(flags & a_THREADED){
 410                mx = prev_in_thread(&message[i - 1]);
 411                i = mx ? (int)PTR2SIZE(mx - message + 1) : 0;
 412             }else
 413                --i;
 414             if(i <= 0){
 415                id = N_("Referencing before first message\n");
 416                goto jerrmsg;
 417             }
 418          }while(message[i - 1].m_flag == MHIDDEN ||
 419             (message[i - 1].m_flag & MDELETED) != (unsigned)f);
 420          a_message_lexno = i;
 421          goto jnumber;
 422       case a_MESSAGE_T_STRING:
 423          pstate &= ~PS_MSGLIST_DIRECT;
 424          if(flags & a_RANGE)
 425             goto jebadrange;
 426
 427          /* This may be a colon modifier */
 428          if((cp = a_message_lexstr.s)[0] != ':')
 429             np = a_message_add_to_namelist(&namelist, &nmlsize, np,
 430                   savestr(a_message_lexstr.s));
 431          else{
 432             while(*++cp != '\0'){
 433                colresult = a_message_evalcol(*cp);
 434                if(colresult == 0){
 435                   n_err(_("Unknown colon modifier: %s\n"), a_message_lexstr.s);
 436                   goto jerr;
 437                }
 438                if(colresult == a_MESSAGE_S_DELETED){
 439                   a_message_list_saw_d = TRU1;
 440                   f |= MDELETED;
 441                }
 442                colmod |= colresult;
 443             }
 444          }
 445          break;
 446       case a_MESSAGE_T_OPEN:
 447          pstate &= ~PS_MSGLIST_DIRECT;
 448          if(flags & a_RANGE)
 449             goto jebadrange;
 450          flags |= a_TOPEN;
 451
 452 #ifdef HAVE_IMAP_SEARCH
 453          /* C99 */{
 454             ssize_t ires;
 455
 456             if((ires = imap_search(a_message_lexstr.s, f)) >= 0){
 457                if(ires > 0)
 458                   flags |= a_ANY;
 459                break;
 460             }
 461          }
 462 #else
 463          n_err(_("Optional selector is not available: %s\n"),
 464             a_message_lexstr.s);
 465 #endif
 466          goto jerr;
 467       case a_MESSAGE_T_DOLLAR:
 468       case a_MESSAGE_T_UP:
 469       case a_MESSAGE_T_SEMI:
 470          pstate |= PS_MSGLIST_GABBY;
 471          /* FALLTHRU */
 472       case a_MESSAGE_T_DOT: /* Don't set _GABBY for dot, to _allow_ history.. */
 473          pstate &= ~PS_MSGLIST_DIRECT;
 474          a_message_lexno = a_message_metamess(a_message_lexstr.s[0], f);
 475          if(a_message_lexno == -1)
 476             goto jerr;
 477          goto jnumber;
 478       case a_MESSAGE_T_BACK:
 479          pstate &= ~PS_MSGLIST_DIRECT;
 480          if(flags & a_RANGE)
 481             goto jebadrange;
 482
 483          flags |= a_TBACK;
 484          for(i = 0; i < msgCount; ++i){
 485             if((mp = &message[i])->m_flag & MHIDDEN)
 486                continue;
 487             if((mp->m_flag & MDELETED) != (unsigned)f){
 488                if(!a_message_list_last_saw_d)
 489                   continue;
 490                a_message_list_saw_d = TRU1;
 491             }
 492             if(mp->m_flag & MOLDMARK){
 493                mark(i + 1, f);
 494                flags &= ~a_TBACK;
 495                flags |= a_ANY;
 496             }
 497          }
 498          break;
 499       case a_MESSAGE_T_ASTER:
 500          pstate &= ~PS_MSGLIST_DIRECT;
 501          if(flags & a_RANGE)
 502             goto jebadrange;
 503          flags |= a_ASTER;
 504          break;
 505       case a_MESSAGE_T_COMMA:
 506          pstate &= ~PS_MSGLIST_DIRECT;
 507          pstate |= PS_MSGLIST_GABBY;
 508          if(flags & a_RANGE)
 509             goto jebadrange;
 510
 511          if(id == NULL){
 512             if((cp = hfield1("in-reply-to", dot)) != NULL)
 513                idfield = a_MESSAGE_ID_IN_REPLY_TO;
 514             else if((cp = hfield1("references", dot)) != NULL){
 515                struct name *enp;
 516
 517                if((enp = extract(cp, GREF)) != NULL){
 518                   while(enp->n_flink != NULL)
 519                      enp = enp->n_flink;
 520                   cp = enp->n_name;
 521                   idfield = a_MESSAGE_ID_REFERENCES;
 522                }else
 523                   cp = NULL;
 524             }
 525
 526             if(cp != NULL)
 527                id = savestr(cp);
 528             else{
 529                id = N_("Message-ID of parent of \"dot\" is indeterminable\n");
 530                goto jerrmsg;
 531             }
 532          }else if(!(pstate & PS_HOOK) && (options & OPT_D_V))
 533             n_err(_("Ignoring redundant specification of , selector\n"));
 534          break;
 535       case a_MESSAGE_T_ERROR:
 536          pstate &= ~PS_MSGLIST_DIRECT;
 537          pstate |= PS_MSGLIST_GABBY;
 538          goto jerr;
 539       }
 540
 541       /* Explicitly disallow invalid ranges for future safety */
 542       if(bufp[0] == '-' && !(flags & a_RANGE)){
 543          if(!(pstate & PS_HOOK))
 544             n_err(_("Ignoring invalid range before: %s\n"), bufp);
 545          ++bufp;
 546       }
 547    }
 548    if(flags & a_RANGE){
 549       id = N_("Missing second range argument\n");
 550       goto jerrmsg;
 551    }
 552
 553    np = a_message_add_to_namelist(&namelist, &nmlsize, np, NULL);
 554    --np;
 555
 556    /* * is special at this point, after we have parsed the entire line */
 557    if(flags & a_ASTER){
 558       for(i = 0; i < msgCount; ++i){
 559          if((mp = &message[i])->m_flag & MHIDDEN)
 560             continue;
 561          if(!a_message_list_saw_d && (mp->m_flag & MDELETED) != (unsigned)f)
 562             continue;
 563          mark(i + 1, f);
 564          flags |= a_ANY;
 565       }
 566       if(!(flags & a_ANY))
 567          goto jenoapp;
 568       goto jleave;
 569    }
 570
 571    /* If any names were given, add any messages which match */
 572    if(np > namelist || id != NULL){
 573       struct search_expr *sep = NULL;
 574
 575       /* The @ search works with struct search_expr, so build an array.
 576        * To simplify array, i.e., regex_t destruction, and optimize for the
 577        * common case we walk the entire array even in case of errors */
 578       if(np > namelist){
 579          sep = scalloc(PTR2SIZE(np - namelist), sizeof(*sep));
 580          for(j = 0, nq = namelist; *nq != NULL; ++j, ++nq){
 581             char *x, *y;
 582
 583             sep[j].ss_sexpr = x = *nq;
 584             if(*x != '@' || (flags & a_ERROR))
 585                continue;
 586
 587             for(y = &x[1];; ++y){
 588                if(*y == '\0' || !fieldnamechar(*y)){
 589                   x = NULL;
 590                   break;
 591                }
 592                if(*y == '@'){
 593                   x = y;
 594                   break;
 595                }
 596             }
 597             sep[j].ss_where = (x == NULL || x - 1 == *nq)
 598                   ? "subject" : savestrbuf(&(*nq)[1], PTR2SIZE(x - *nq) - 1);
 599
 600             x = (x == NULL ? *nq : x) + 1;
 601             if(*x == '\0'){ /* XXX Simply remove from list instead? */
 602                n_err(_("Empty [@..]@ search expression\n"));
 603                flags |= a_ERROR;
 604                continue;
 605             }
 606 #ifdef HAVE_REGEX
 607             if(is_maybe_regex(x)){
 608                sep[j].ss_sexpr = NULL;
 609                if(regcomp(&sep[j].ss_regex, x,
 610                      REG_EXTENDED | REG_ICASE | REG_NOSUB) != 0){
 611                   if(!(pstate & PS_HOOK) && (options & OPT_D_V))
 612                      n_err(_("Invalid regular expression: >>> %s <<<\n"), x);
 613                   flags |= a_ERROR;
 614                   continue;
 615                }
 616             }else
 617 #endif
 618                sep[j].ss_sexpr = x;
 619          }
 620          if(flags & a_ERROR)
 621             goto jnamesearch_sepfree;
 622       }
 623
 624       /* Iterate the entire message array */
 625       srelax_hold();
 626       if(ok_blook(allnet))
 627          flags |= a_ALLNET;
 628       for(i = 0; i < msgCount; ++i){
 629          if((mp = &message[i])->m_flag & (MMARK | MHIDDEN))
 630             continue;
 631          if(!a_message_list_saw_d && (mp->m_flag & MDELETED) != (unsigned)f)
 632             continue;
 633
 634          flags &= ~a_TMP;
 635          if(np > namelist){
 636             for(nq = namelist; *nq != NULL; ++nq){
 637                if(**nq == '@'){
 638                   if(a_message_match_at(mp, sep + PTR2SIZE(nq - namelist))){
 639                      flags |= a_TMP;
 640                      break;
 641                   }
 642                }else if(**nq == '/'){
 643                   if(a_message_match_dash(mp, *nq)){
 644                      flags |= a_TMP;
 645                      break;
 646                   }
 647                }else if(a_message_match_sender(mp, *nq, (flags & a_ALLNET))){
 648                   flags |= a_TMP;
 649                   break;
 650                }
 651             }
 652          }
 653          if(!(flags & a_TMP) &&
 654                id != NULL && a_message_match_mid(mp, id, idfield))
 655             flags |= a_TMP;
 656
 657          if(flags & a_TMP){
 658             mark(i + 1, f);
 659             flags |= a_ANY;
 660          }
 661          srelax();
 662       }
 663       srelax_rele();
 664
 665 jnamesearch_sepfree:
 666       if(sep != NULL){
 667 #ifdef HAVE_REGEX
 668          for(j = PTR2SIZE(np - namelist); j-- != 0;)
 669             if(sep[j].ss_sexpr == NULL)
 670                regfree(&sep[j].ss_regex);
 671 #endif
 672          free(sep);
 673       }
 674       if(flags & a_ERROR)
 675          goto jerr;
 676    }
 677
 678    /* If any colon modifiers were given, go through and mark any messages which
 679     * do satisfy the modifiers */
 680    if(colmod != 0){
 681       for(i = 0; i < msgCount; ++i){
 682          struct a_message_coltab const *colp;
 683
 684          if((mp = &message[i])->m_flag & (MMARK | MHIDDEN))
 685             continue;
 686          if(!a_message_list_saw_d && (mp->m_flag & MDELETED) != (unsigned)f)
 687             continue;
 688
 689          for(colp = a_message_coltabs;
 690                PTRCMP(colp, <, &a_message_coltabs[NELEM(a_message_coltabs)]);
 691                ++colp)
 692             if((colp->mco_bit & colmod) &&
 693                   ((mp->m_flag & colp->mco_mask) == (unsigned)colp->mco_equal)){
 694                mark(i + 1, f);
 695                flags |= a_ANY;
 696                break;
 697             }
 698       }
 699    }
 700
 701    /* It shall be an error if ` didn't match anything, and nothing else did */
 702    if((flags & (a_TBACK | a_ANY)) == a_TBACK){
 703       id = N_("No previously marked messages\n");
 704       goto jerrmsg;
 705    }else if(!(flags & a_ANY))
 706       goto jenoapp;
 707
 708    assert(!(flags & a_ERROR));
 709 jleave:
 710    if(flags & a_ALLOC){
 711       free(namelist);
 712       ac_free(a_message_lexstr.s);
 713    }
 714    NYD_LEAVE;
 715    return (flags & a_ERROR) ? -1 : 0;
 716
 717 jebadrange:
 718    id = N_("Invalid range endpoint\n");
 719    goto jerrmsg;
 720 jenoapp:
 721    id = N_("No applicable messages\n");
 722 jerrmsg:
 723    if(!(pstate & PS_HOOK_MASK))
 724       n_err(V_(id));
 725 jerr:
 726    flags |= a_ERROR;
 727    goto jleave;
 728 }
 729
 730 static int
 731 a_message_evalcol(int col){
 732    struct a_message_coltab const *colp;
 733    int rv;
 734    NYD2_ENTER;
 735
 736    rv = 0;
 737    for(colp = a_message_coltabs;
 738          PTRCMP(colp, <, &a_message_coltabs[NELEM(a_message_coltabs)]); ++colp)
 739       if(colp->mco_char == col){
 740          rv = colp->mco_bit;
 741          break;
 742       }
 743    NYD2_LEAVE;
 744    return rv;
 745 }
 746
 747 static bool_t
 748 a_message_check(int mno, int f){
 749    struct message *mp;
 750    NYD2_ENTER;
 751
 752    if(mno < 1 || mno > msgCount){
 753       n_err(_("%d: Invalid message number\n"), mno);
 754       mno = 1;
 755    }else if(((mp = &message[mno - 1])->m_flag & MHIDDEN) ||
 756          (f != MDELETED && (mp->m_flag & MDELETED) != 0))
 757       n_err(_("%d: inappropriate message\n"), mno);
 758    else
 759       mno = 0;
 760    NYD2_LEAVE;
 761    return (mno == 0);
 762 }
 763
 764 static int
 765 a_message_scan(char **sp)
 766 {
 767    char *cp, *cp2;
 768    struct a_message_lex const *lp;
 769    int rv, c, inquote, quotec;
 770    NYD_ENTER;
 771
 772    rv = a_MESSAGE_T_EOL;
 773
 774    cp = *sp;
 775    cp2 = a_message_lexstr.s;
 776    c = *cp++;
 777
 778    /* strip away leading white space */
 779    while(blankchar(c))
 780       c = *cp++;
 781
 782    /* If no characters remain, we are at end of line, so report that */
 783    if(c == '\0'){
 784       *sp = --cp;
 785       goto jleave;
 786    }
 787
 788    /* Select members of a message thread */
 789    if(c == '&'){
 790       if(*cp == '\0' || spacechar(*cp)){
 791          a_message_lexstr.s[0] = '.';
 792          a_message_lexstr.s[1] = '\0';
 793          *sp = cp;
 794          rv = a_MESSAGE_T_DOT | INT_MIN;
 795          goto jleave;
 796       }
 797       rv = INT_MIN;
 798       c = *cp++;
 799    }
 800
 801    /* If the leading character is a digit, scan the number and convert it
 802     * on the fly.  Return a_MESSAGE_T_NUMBER when done */
 803    if(digitchar(c)){
 804       a_message_lexno = 0;
 805       do{
 806          a_message_lexno = (a_message_lexno * 10) + c - '0';
 807          *cp2++ = c;
 808       }while((c = *cp++, digitchar(c)));
 809       *cp2 = '\0';
 810       *sp = --cp;
 811       rv |= a_MESSAGE_T_NUMBER;
 812       goto jleave;
 813    }
 814
 815    /* An IMAP SEARCH list. Note that a_MESSAGE_T_OPEN has always been included
 816     * in singles[] in Mail and mailx. Thus although there is no formal
 817     * definition for (LIST) lists, they do not collide with historical
 818     * practice because a subject string (LIST) could never been matched
 819     * this way */
 820    if (c == '(') {
 821       ui32_t level = 1;
 822       inquote = 0;
 823       *cp2++ = c;
 824       do {
 825          if ((c = *cp++&0377) == '\0') {
 826 jmtop:
 827             n_err(_("Missing )\n"));
 828             rv = a_MESSAGE_T_ERROR;
 829             goto jleave;
 830          }
 831          if (inquote && c == '\\') {
 832             *cp2++ = c;
 833             c = *cp++&0377;
 834             if (c == '\0')
 835                goto jmtop;
 836          } else if (c == '"')
 837             inquote = !inquote;
 838          else if (inquote)
 839             /*EMPTY*/;
 840          else if (c == '(')
 841             ++level;
 842          else if (c == ')')
 843             --level;
 844          else if (spacechar(c)) {
 845             /* Replace unquoted whitespace by single space characters, to make
 846              * the string IMAP SEARCH conformant */
 847             c = ' ';
 848             if (cp2[-1] == ' ')
 849                --cp2;
 850          }
 851          *cp2++ = c;
 852       } while (c != ')' || level > 0);
 853       *cp2 = '\0';
 854       *sp = cp;
 855       rv |= a_MESSAGE_T_OPEN;
 856       goto jleave;
 857    }
 858
 859    /* Check for single character tokens; return such if found */
 860    for(lp = a_message_singles;
 861          PTRCMP(lp, <, &a_message_singles[NELEM(a_message_singles)]); ++lp)
 862       if(c == lp->ml_char){
 863          a_message_lexstr.s[0] = c;
 864          a_message_lexstr.s[1] = '\0';
 865          *sp = cp;
 866          rv |= lp->ml_token;
 867          goto jleave;
 868       }
 869
 870    /* We've got a string!  Copy all the characters of the string into
 871     * a_message_lexstr, until we see a null, space, or tab.  If the lead
 872     * character is a " or ', save it and scan until you get another */
 873    quotec = 0;
 874    if (c == '\'' || c == '"') {
 875       quotec = c;
 876       c = *cp++;
 877    }
 878    while (c != '\0') {
 879       if (quotec == 0 && c == '\\' && *cp != '\0')
 880          c = *cp++;
 881       if (c == quotec) {
 882          ++cp;
 883          break;
 884       }
 885       if (quotec == 0 && blankchar(c))
 886          break;
 887       if (PTRCMP(cp2 - a_message_lexstr.s, <, a_message_lexstr.l))
 888          *cp2++ = c;
 889       c = *cp++;
 890    }
 891    if (quotec && c == 0) {
 892       n_err(_("Missing %c\n"), quotec);
 893       rv = a_MESSAGE_T_ERROR;
 894       goto jleave;
 895    }
 896    *sp = --cp;
 897    *cp2 = '\0';
 898    rv |= a_MESSAGE_T_STRING;
 899 jleave:
 900    NYD_LEAVE;
 901    return rv;
 902 }
 903
 904 static bool_t
 905 a_message_match_sender(struct message *mp, char const *str, bool_t allnet){
 906    char const *str_base, *np_base, *np;
 907    char sc, nc;
 908    bool_t rv;
 909    NYD2_ENTER;
 910
 911    /* Empty string doesn't match */
 912    if(*(str_base = str) == '\0'){
 913       rv = FAL0;
 914       goto jleave;
 915    }
 916
 917    /* *allnet* is POSIX and, since it explicitly mentions login and user names,
 918     * most likely case-sensitive.  XXX Still allow substr matching, though
 919     * XXX possibly the first letter should be case-insensitive, then? */
 920    if(allnet){
 921       for(np_base = np = nameof(mp, 0);;){
 922          if((sc = *str++) == '@')
 923             sc = '\0';
 924          if((nc = *np++) == '@' || nc == '\0' || sc == '\0')
 925             break;
 926          if(sc != nc){
 927             np = ++np_base;
 928             str = str_base;
 929          }
 930       }
 931       rv = (sc == '\0');
 932    }else{
 933       /* TODO POSIX says ~"match any address as shown in header overview",
 934        * TODO but a normalized match would be more sane i guess.
 935        * TODO struct name should gain a comparison method, normalize realname
 936        * TODO content (in TODO) and thus match as likewise
 937        * TODO "Buddy (Today) <here>" and "(Now) Buddy <here>" */
 938       char const *real_base;
 939       bool_t again;
 940
 941       real_base = name1(mp, 0);
 942       again = ok_blook(showname);
 943 jagain:
 944       np_base = np = again ? realname(real_base) : skin(real_base);
 945       str = str_base;
 946       for(;;){
 947          sc = *str++;
 948          if((nc = *np++) == '\0' || sc == '\0')
 949             break;
 950          sc = upperconv(sc);
 951          nc = upperconv(nc);
 952          if(sc != nc){
 953             np = ++np_base;
 954             str = str_base;
 955          }
 956       }
 957
 958       /* And really if i want to match 'on@' then i want it to match even if
 959        * *showname* is set! */
 960       if(!(rv = (sc == '\0')) && again){
 961          again = FAL0;
 962          goto jagain;
 963       }
 964    }
 965 jleave:
 966    NYD2_LEAVE;
 967    return rv;
 968 }
 969
 970 static bool_t
 971 a_message_match_mid(struct message *mp, char const *id,
 972       enum a_message_idfield idfield){
 973    char const *cp;
 974    bool_t rv;
 975    NYD2_ENTER;
 976
 977    rv = FAL0;
 978
 979    if((cp = hfield1("message-id", mp)) != NULL){
 980       switch(idfield){
 981       case a_MESSAGE_ID_REFERENCES:
 982          if(!msgidcmp(id, cp))
 983             rv = TRU1;
 984          break;
 985       case a_MESSAGE_ID_IN_REPLY_TO:{
 986          struct name *np;
 987
 988          if((np = extract(id, GREF)) != NULL)
 989             do{
 990                if(!msgidcmp(np->n_name, cp)){
 991                   rv = TRU1;
 992                   break;
 993                }
 994             }while((np = np->n_flink) != NULL);
 995          break;
 996       }
 997       }
 998    }
 999    NYD2_LEAVE;
1000    return rv;
1001 }
1002
1003 static bool_t
1004 a_message_match_dash(struct message *mp, char const *str){
1005    static char lastscan[128];
1006
1007    struct str in, out;
1008    char *hfield, *hbody;
1009    bool_t rv;
1010    NYD2_ENTER;
1011
1012    rv = FAL0;
1013
1014    if(*++str == '\0')
1015       str = lastscan;
1016    else
1017       n_strscpy(lastscan, str, sizeof lastscan); /* XXX use new n_str object! */
1018
1019    /* Now look, ignoring case, for the word in the string */
1020    if(ok_blook(searchheaders) && (hfield = strchr(str, ':'))){
1021       size_t l;
1022
1023       l = PTR2SIZE(hfield - str);
1024       hfield = ac_alloc(l +1);
1025       memcpy(hfield, str, l);
1026       hfield[l] = '\0';
1027       hbody = hfieldX(hfield, mp);
1028       ac_free(hfield);
1029       hfield = UNCONST(str + l + 1);
1030    }else{
1031       hfield = UNCONST(str);
1032       hbody = hfield1("subject", mp);
1033    }
1034    if(hbody == NULL)
1035       goto jleave;
1036
1037    in.l = strlen(in.s = hbody);
1038    mime_fromhdr(&in, &out, TD_ICONV);
1039    rv = substr(out.s, hfield);
1040    free(out.s);
1041 jleave:
1042    NYD2_LEAVE;
1043    return rv;
1044 }
1045
1046 static bool_t
1047 a_message_match_at(struct message *mp, struct search_expr *sep){
1048    struct str in, out;
1049    char *nfield;
1050    char const *cfield;
1051    bool_t rv;
1052    NYD2_ENTER;
1053
1054    rv = FAL0;
1055    nfield = savestr(sep->ss_where);
1056
1057    while((cfield = n_strsep(&nfield, ',', TRU1)) != NULL){
1058       if(!asccasecmp(cfield, "body") ||
1059             (cfield[1] == '\0' && cfield[0] == '>')){
1060          rv = FAL0;
1061 jmsg:
1062          if((rv = message_match(mp, sep, rv)))
1063             break;
1064          continue;
1065       }else if(!asccasecmp(cfield, "text") ||
1066             (cfield[1] == '\0' && cfield[0] == '=')){
1067          rv = TRU1;
1068          goto jmsg;
1069       }
1070
1071       if(!asccasecmp(cfield, "header") ||
1072             (cfield[1] == '\0' && cfield[0] == '<')){
1073          if((rv = header_match(mp, sep)))
1074             break;
1075          continue;
1076       }
1077
1078       /* This is not a special name, so take care for the "skin" prefix !
1079        * and possible abbreviations */
1080       /* C99 */{
1081          struct name *np;
1082          bool_t doskin;
1083
1084          if((doskin = (*cfield == '~')))
1085             ++cfield;
1086          if(cfield[0] != '\0' && cfield[1] == '\0'){
1087             char const x[][8] = {"from", "to", "cc", "bcc", "subject"};
1088             size_t i;
1089             char c1;
1090
1091             c1 = lowerconv(cfield[0]);
1092             for(i = 0; i < NELEM(x); ++i){
1093                if(c1 == x[i][0]){
1094                   cfield = x[i];
1095                   break;
1096                }
1097             }
1098          }
1099          if((in.s = hfieldX(cfield, mp)) == NULL)
1100             continue;
1101
1102          /* Shall we split into address list and match the addresses only? */
1103          if(doskin){
1104             np = lextract(in.s, GSKIN);
1105             if(np == NULL)
1106                continue;
1107             out.s = np->n_name;
1108          }else{
1109             np = NULL;
1110             in.l = strlen(in.s);
1111             mime_fromhdr(&in, &out, TD_ICONV);
1112          }
1113
1114 jnext_name:
1115 #ifdef HAVE_REGEX
1116          if(sep->ss_sexpr == NULL)
1117             rv = (regexec(&sep->ss_regex, out.s, 0,NULL, 0) != REG_NOMATCH);
1118          else
1119 #endif
1120             rv = substr(out.s, sep->ss_sexpr);
1121          if(np == NULL)
1122             free(out.s);
1123          if(rv)
1124             break;
1125          if(np != NULL && (np = np->n_flink) != NULL){
1126             out.s = np->n_name;
1127             goto jnext_name;
1128          }
1129       }
1130    }
1131    NYD2_LEAVE;
1132    return rv;
1133 }
1134
1135 static void
1136 a_message_unmark(int mesg){
1137    size_t i;
1138    NYD2_ENTER;
1139
1140    i = (size_t)mesg;
1141    if(i < 1 || UICMP(z, i, >, msgCount))
1142       n_panic(_("Bad message number to unmark"));
1143    message[--i].m_flag &= ~MMARK;
1144    NYD2_LEAVE;
1145 }
1146
1147 static int
1148 a_message_metamess(int meta, int f)
1149 {
1150    int c, m;
1151    struct message *mp;
1152    NYD2_ENTER;
1153
1154    c = meta;
1155    switch (c) {
1156    case '^': /* First 'good' message left */
1157       mp = mb.mb_threaded ? threadroot : message;
1158       while (PTRCMP(mp, <, message + msgCount)) {
1159          if (!(mp->m_flag & MHIDDEN) && (mp->m_flag & MDELETED) == (ui32_t)f) {
1160             c = (int)PTR2SIZE(mp - message + 1);
1161             goto jleave;
1162          }
1163          if (mb.mb_threaded) {
1164             mp = next_in_thread(mp);
1165             if (mp == NULL)
1166                break;
1167          } else
1168             ++mp;
1169       }
1170       if (!(pstate & PS_HOOK_MASK))
1171          n_err(_("No applicable messages\n"));
1172       goto jem1;
1173
1174    case '$': /* Last 'good message left */
1175       mp = mb.mb_threaded
1176             ? this_in_thread(threadroot, -1) : message + msgCount - 1;
1177       while (mp >= message) {
1178          if (!(mp->m_flag & MHIDDEN) && (mp->m_flag & MDELETED) == (ui32_t)f) {
1179             c = (int)PTR2SIZE(mp - message + 1);
1180             goto jleave;
1181          }
1182          if (mb.mb_threaded) {
1183             mp = prev_in_thread(mp);
1184             if (mp == NULL)
1185                break;
1186          } else
1187             --mp;
1188       }
1189       if (!(pstate & PS_HOOK_MASK))
1190          n_err(_("No applicable messages\n"));
1191       goto jem1;
1192
1193    case '.':
1194       /* Current message */
1195       m = dot - message + 1;
1196       if ((dot->m_flag & MHIDDEN) || (dot->m_flag & MDELETED) != (ui32_t)f) {
1197          n_err(_("%d: inappropriate message\n"), m);
1198          goto jem1;
1199       }
1200       c = m;
1201       break;
1202
1203    case ';':
1204       /* Previously current message */
1205       if (prevdot == NULL) {
1206          n_err(_("No previously current message\n"));
1207          goto jem1;
1208       }
1209       m = prevdot - message + 1;
1210       if ((prevdot->m_flag & MHIDDEN) ||
1211             (prevdot->m_flag & MDELETED) != (ui32_t)f) {
1212          n_err(_("%d: inappropriate message\n"), m);
1213          goto jem1;
1214       }
1215       c = m;
1216       break;
1217
1218    default:
1219       n_err(_("Unknown selector: %c\n"), c);
1220       goto jem1;
1221    }
1222 jleave:
1223    NYD2_LEAVE;
1224    return c;
1225 jem1:
1226    c = -1;
1227    goto jleave;
1228 }
1229
1230 static void
1231 a_message__threadmark(struct message *self, int f){
1232    NYD2_ENTER;
1233    if(!(self->m_flag & MHIDDEN) &&
1234          (f == MDELETED || !(self->m_flag & MDELETED) || a_message_list_saw_d))
1235       self->m_flag |= MMARK;
1236
1237    if((self = self->m_child) != NULL){
1238       goto jcall;
1239       while((self = self->m_younger) != NULL)
1240          if(self->m_child != NULL)
1241 jcall:
1242             a_message__threadmark(self, f);
1243          else
1244             self->m_flag |= MMARK;
1245    }
1246    NYD2_LEAVE;
1247 }
1248
1249 FL FILE *
1250 setinput(struct mailbox *mp, struct message *m, enum needspec need){
1251    FILE *rv;
1252    enum okay ok;
1253    NYD_ENTER;
1254
1255    rv = NULL;
1256    ok = STOP;
1257
1258    switch(need){
1259    case NEED_HEADER:
1260       ok = (m->m_have & HAVE_HEADER) ? OKAY : a_message_get_header(m);
1261       break;
1262    case NEED_BODY:
1263       ok = (m->m_have & HAVE_BODY) ? OKAY : get_body(m);
1264       break;
1265    case NEED_UNSPEC:
1266       ok = OKAY;
1267       break;
1268    }
1269    if(ok != OKAY)
1270       goto jleave;
1271
1272    fflush(mp->mb_otf);
1273    if(fseek(mp->mb_itf, (long)mailx_positionof(m->m_block, m->m_offset),
1274          SEEK_SET) == -1){
1275       n_perr(_("fseek"), 0);
1276       n_panic(_("temporary file seek"));
1277    }
1278    rv = mp->mb_itf;
1279 jleave:
1280    NYD_LEAVE;
1281    return rv;
1282 }
1283
1284 FL enum okay
1285 get_body(struct message *mp){
1286    enum okay rv;
1287    NYD_ENTER;
1288    UNUSED(mp);
1289
1290    switch(mb.mb_type){
1291    case MB_FILE:
1292    case MB_MAILDIR:
1293       rv = OKAY;
1294       break;
1295 #ifdef HAVE_POP3
1296    case MB_POP3:
1297       rv = pop3_body(mp);
1298       break;
1299 #endif
1300    case MB_VOID:
1301    default:
1302       rv = STOP;
1303       break;
1304    }
1305    NYD_LEAVE;
1306    return rv;
1307 }
1308
1309 FL void
1310 message_reset(void){
1311    NYD_ENTER;
1312    if(message != NULL){
1313       free(message);
1314       message = NULL;
1315    }
1316    msgCount = 0;
1317    a_message_mem_space = 0;
1318    NYD_LEAVE;
1319 }
1320
1321 FL void
1322 message_append(struct message *mp){
1323    NYD_ENTER;
1324    if(UICMP(z, msgCount + 1, >=, a_message_mem_space)){
1325       /* XXX remove _mem_space magics (or use s_Vector) */
1326       a_message_mem_space = ((a_message_mem_space >= 128 &&
1327                a_message_mem_space <= 1000000)
1328             ? a_message_mem_space << 1 : a_message_mem_space + 64);
1329       message = srealloc(message, a_message_mem_space * sizeof(*message));
1330    }
1331    if(msgCount > 0){
1332       if(mp != NULL)
1333          message[msgCount - 1] = *mp;
1334       else
1335          memset(&message[msgCount - 1], 0, sizeof *message);
1336    }
1337    NYD_LEAVE;
1338 }
1339
1340 FL void
1341 message_append_null(void){
1342    NYD_ENTER;
1343    if(msgCount == 0)
1344       message_append(NULL);
1345    setdot(message);
1346    message[msgCount].m_size = 0;
1347    message[msgCount].m_lines = 0;
1348    NYD_LEAVE;
1349 }
1350
1351 FL bool_t
1352 message_match(struct message *mp, struct search_expr const *sep,
1353       bool_t with_headers){
1354    char **line;
1355    size_t *linesize, cnt;
1356    FILE *fp;
1357    bool_t rv;
1358    NYD_ENTER;
1359
1360    rv = FAL0;
1361
1362    if((fp = Ftmp(NULL, "mpmatch", OF_RDWR | OF_UNLINK | OF_REGISTER)) == NULL)
1363       goto j_leave;
1364
1365    if(sendmp(mp, fp, NULL, NULL, SEND_TOSRCH, NULL) < 0)
1366       goto jleave;
1367    fflush_rewind(fp);
1368
1369    cnt = fsize(fp);
1370    line = &termios_state.ts_linebuf; /* XXX line pool */
1371    linesize = &termios_state.ts_linesize; /* XXX line pool */
1372
1373    if(!with_headers)
1374       while(fgetline(line, linesize, &cnt, NULL, fp, 0))
1375          if (**line == '\n')
1376             break;
1377
1378    while(fgetline(line, linesize, &cnt, NULL, fp, 0)){
1379 #ifdef HAVE_REGEX
1380       if(sep->ss_sexpr == NULL){
1381          if(regexec(&sep->ss_regex, *line, 0,NULL, 0) == REG_NOMATCH)
1382             continue;
1383       }else
1384 #endif
1385       if(!substr(*line, sep->ss_sexpr))
1386          continue;
1387       rv = TRU1;
1388       break;
1389    }
1390
1391 jleave:
1392    Fclose(fp);
1393 j_leave:
1394    NYD_LEAVE;
1395    return rv;
1396 }
1397
1398 FL struct message *
1399 setdot(struct message *mp){
1400    NYD_ENTER;
1401    if(dot != mp){
1402       prevdot = dot;
1403       pstate &= ~PS_DID_PRINT_DOT;
1404    }
1405    dot = mp;
1406    uncollapse1(dot, 0);
1407    NYD_LEAVE;
1408    return dot;
1409 }
1410
1411 FL void
1412 touch(struct message *mp){
1413    NYD_ENTER;
1414    mp->m_flag |= MTOUCH;
1415    if(!(mp->m_flag & MREAD))
1416       mp->m_flag |= MREAD | MSTATUS;
1417    NYD_LEAVE;
1418 }
1419
1420 FL int
1421 getmsglist(char *buf, int *vector, int flags)
1422 {
1423    int *ip, mc;
1424    struct message *mp;
1425    NYD_ENTER;
1426
1427    pstate &= ~PS_ARGLIST_MASK;
1428    a_message_list_last_saw_d = a_message_list_saw_d;
1429    a_message_list_saw_d = FAL0;
1430
1431    if(msgCount == 0){
1432       *vector = 0;
1433       mc = 0;
1434       goto jleave;
1435    }
1436
1437    pstate |= PS_MSGLIST_DIRECT;
1438
1439    if(a_message_markall(buf, flags) < 0){
1440       mc = -1;
1441       goto jleave;
1442    }
1443
1444    ip = vector;
1445    if(pstate & PS_HOOK_NEWMAIL){
1446       mc = 0;
1447       for(mp = message; mp < &message[msgCount]; ++mp)
1448          if(mp->m_flag & MMARK){
1449             if(!(mp->m_flag & MNEWEST))
1450                a_message_unmark((int)PTR2SIZE(mp - message + 1));
1451             else
1452                ++mc;
1453          }
1454       if(mc == 0){
1455          mc = -1;
1456          goto jleave;
1457       }
1458    }
1459
1460    if(mb.mb_threaded == 0){
1461       for(mp = message; mp < &message[msgCount]; ++mp)
1462          if(mp->m_flag & MMARK)
1463             *ip++ = (int)PTR2SIZE(mp - message + 1);
1464    }else{
1465       for(mp = threadroot; mp != NULL; mp = next_in_thread(mp))
1466          if(mp->m_flag & MMARK)
1467             *ip++ = (int)PTR2SIZE(mp - message + 1);
1468    }
1469    *ip = 0;
1470    mc = (int)PTR2SIZE(ip - vector);
1471    if(mc != 1)
1472       pstate &= ~PS_MSGLIST_DIRECT;
1473 jleave:
1474    NYD_LEAVE;
1475    return mc;
1476 }
1477
1478 FL int
1479 first(int f, int m)
1480 {
1481    struct message *mp;
1482    int rv;
1483    NYD_ENTER;
1484
1485    if (msgCount == 0) {
1486       rv = 0;
1487       goto jleave;
1488    }
1489
1490    f &= MDELETED;
1491    m &= MDELETED;
1492    for (mp = dot;
1493          mb.mb_threaded ? (mp != NULL) : PTRCMP(mp, <, message + msgCount);
1494          mb.mb_threaded ? (mp = next_in_thread(mp)) : ++mp) {
1495       if (!(mp->m_flag & MHIDDEN) && (mp->m_flag & m) == (ui32_t)f) {
1496          rv = (int)PTR2SIZE(mp - message + 1);
1497          goto jleave;
1498       }
1499    }
1500
1501    if (dot > message) {
1502       for (mp = dot - 1; (mb.mb_threaded ? (mp != NULL) : (mp >= message));
1503             mb.mb_threaded ? (mp = prev_in_thread(mp)) : --mp) {
1504          if (!(mp->m_flag & MHIDDEN) && (mp->m_flag & m) == (ui32_t)f) {
1505             rv = (int)PTR2SIZE(mp - message + 1);
1506             goto jleave;
1507          }
1508       }
1509    }
1510    rv = 0;
1511 jleave:
1512    NYD_LEAVE;
1513    return rv;
1514 }
1515
1516 FL void
1517 mark(int mno, int f){
1518    struct message *mp;
1519    int i;
1520    NYD_ENTER;
1521
1522    i = mno;
1523    if(i < 1 || i > msgCount)
1524       n_panic(_("Bad message number to mark"));
1525    mp = &message[--i];
1526
1527    if(mb.mb_threaded == 1 && a_message_threadflag)
1528       a_message__threadmark(mp, f);
1529    else{
1530       assert(!(mp->m_flag & MHIDDEN));
1531       mp->m_flag |= MMARK;
1532    }
1533    NYD_LEAVE;
1534 }
1535
1536 /* s-it-mode */