diplodocus.org Git - nmh/blob - sbr/fmt_scan.c

   1
   2 /*
   3  * fmt_scan.c -- format string interpretation
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  *
   9  * This is the engine that processes the format instructions created by
  10  * fmt_compile (found in fmt_compile.c).
  11  */
  12
  13 #include <h/mh.h>
  14 #include <h/addrsbr.h>
  15 #include <h/fmt_scan.h>
  16 #include <h/tws.h>
  17 #include <h/fmt_compile.h>
  18
  19 #ifdef HAVE_SYS_TIME_H
  20 # include <sys/time.h>
  21 #endif
  22 #include <time.h>
  23 #ifdef MULTIBYTE_SUPPORT
  24 #  include <wctype.h>
  25 #  include <wchar.h>
  26 #endif
  27
  28 #ifdef LBL
  29 struct msgs *fmt_current_folder; /* current folder (set by main program) */
  30 #endif
  31
  32 extern int fmt_norm;            /* defined in sbr/fmt_def.c = AD_NAME */
  33 struct mailname fmt_mnull = { NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0,
  34                               NULL, NULL };
  35
  36 /*
  37  * static prototypes
  38  */
  39 static int match (char *, char *);
  40 static char *get_x400_friendly (char *, char *, int);
  41 static int get_x400_comp (char *, char *, char *, int);
  42
  43
  44 /*
  45  * test if string "sub" appears anywhere in
  46  * string "str" (case insensitive).
  47  */
  48
  49 static int
  50 match (char *str, char *sub)
  51 {
  52     int c1, c2;
  53     char *s1, *s2;
  54
  55 #ifdef LOCALE
  56     while ((c1 = *sub)) {
  57         c1 = (isalpha(c1) && isupper(c1)) ? tolower(c1) : c1;
  58         while ((c2 = *str++) && c1 != ((isalpha(c2) && isupper(c2)) ? tolower(c2) : c2))
  59             ;
  60         if (! c2)
  61             return 0;
  62         s1 = sub + 1; s2 = str;
  63         while ((c1 = *s1++) && ((isalpha(c1) && isupper(c1)) ? tolower(c1) : c1) == ((isalpha(c2 =*s2++) && isupper(c2)) ? tolower(c2) : c2))
  64             ;
  65         if (! c1)
  66             return 1;
  67     }
  68 #else
  69     while ((c1 = *sub)) {
  70         while ((c2 = *str++) && (c1 | 040) != (c2 | 040))
  71             ;
  72         if (! c2)
  73             return 0;
  74         s1 = sub + 1; s2 = str;
  75         while ((c1 = *s1++) && (c1 | 040) == (*s2++ | 040))
  76             ;
  77         if (! c1)
  78             return 1;
  79     }
  80 #endif
  81     return 1;
  82 }
  83
  84 /*
  85  * copy a number to the destination subject to a maximum width
  86  */
  87 static void
  88 cpnumber(char **dest, int num, unsigned int wid, char fill, size_t n) {
  89     int i, c;
  90     char *sp;
  91     char *cp = *dest;
  92     char *ep = cp + n;
  93
  94     if (cp + wid < ep) {
  95         if ((i = (num)) < 0)
  96             i = -(num);
  97         if ((c = (wid)) < 0)
  98             c = -c;
  99         sp = cp + c;
 100         do {
 101             *--sp = (i % 10) + '0';
 102             i /= 10;
 103         } while (i > 0 && sp > cp);
 104         if (i > 0)
 105             *sp = '?';
 106         else if ((num) < 0 && sp > cp)
 107             *--sp = '-';
 108         while (sp > cp)
 109             *--sp = fill;
 110         cp += c;
 111     }
 112     *dest = cp;
 113 }
 114
 115 /*
 116  * copy string from str to dest padding with the fill character to a size
 117  * of wid characters. if wid is negative, the string is right aligned
 118  * no more than n bytes are copied
 119  */
 120 static void
 121 cptrimmed(char **dest, char *str, unsigned int wid, char fill, size_t n) {
 122     int remaining;     /* remaining output width available */
 123     int c, ljust;
 124     int end;           /* number of input bytes remaining in str */
 125 #ifdef MULTIBYTE_SUPPORT
 126     int char_len;      /* bytes in current character */
 127     int w;
 128     wchar_t wide_char;
 129 #endif
 130     char *sp;          /* current position in source string */
 131     char *cp = *dest;  /* current position in destination string */
 132     char *ep = cp + n; /* end of destination buffer */
 133     int prevCtrl = 1;
 134
 135     /* get alignment */
 136     ljust = 0;
 137     if ((remaining = (wid)) < 0) {
 138         remaining = -remaining;
 139         ljust++;
 140     }
 141     if ((sp = (str))) {
 142         mbtowc(NULL, NULL, 0); /* reset shift state */
 143         end = strlen(str);
 144         while (*sp && remaining > 0 && end > 0) {
 145 #ifdef MULTIBYTE_SUPPORT
 146             char_len = mbtowc(&wide_char, sp, end);
 147             if (char_len <= 0 || (cp + char_len > ep))
 148                 break;
 149
 150             end -= char_len;
 151
 152             if (iswcntrl(wide_char) || iswspace(wide_char)) {
 153                 sp += char_len;
 154 #else
 155             end--;
 156             /* isnctrl(), etc., take an int argument.  Cygwin's ctype.h
 157                intentionally warns if they are passed a char. */
 158             int c = *sp;
 159             if (iscntrl(c) || isspace(c)) {
 160                 sp++;
 161 #endif
 162                 if (!prevCtrl) {
 163                     *cp++ = ' ';
 164                     remaining--;
 165                 }
 166
 167                 prevCtrl = 1;
 168                 continue;
 169             }
 170             prevCtrl = 0;
 171
 172 #ifdef MULTIBYTE_SUPPORT
 173             w = wcwidth(wide_char);
 174             if (w >= 0 && remaining >= w) {
 175                 strncpy(cp, sp, char_len);
 176                 cp += char_len;
 177                 remaining -= w;
 178             }
 179             sp += char_len;
 180 #else
 181             *cp++ = *sp++;
 182             remaining--;
 183 #endif
 184         }
 185     }
 186
 187     if (ljust) {
 188         if (cp + remaining > ep)
 189             remaining = ep - cp;
 190         ep = cp + remaining;
 191         if (remaining > 0) {
 192             /* copy string to the right */
 193             while (--cp >= *dest)
 194                 *(cp + remaining) = *cp;
 195             /* add padding at the beginning */
 196             cp += remaining;
 197             for (c=remaining; c>0; c--)
 198                 *cp-- = fill;
 199         }
 200         *dest = ep;
 201     } else {
 202         /* pad remaining space */
 203         while (remaining-- > 0 && cp < ep)
 204                 *cp++ = fill;
 205         *dest = cp;
 206     }
 207 }
 208
 209 static void
 210 cpstripped (char **start, char *end, char *str)
 211 {
 212     int c;
 213     char *s = str;
 214
 215     if (!s)
 216         return;
 217
 218     /* skip any initial control characters or spaces */
 219     while ((c = (unsigned char) *s) &&
 220 #ifdef LOCALE
 221             (iscntrl(c) || isspace(c)))
 222 #else
 223             (c <= 32))
 224 #endif
 225         s++;
 226
 227     /* compact repeated control characters and spaces into a single space */
 228     while((c = (unsigned char) *s++) && *start < end)
 229         if (!iscntrl(c) && !isspace(c))
 230             *(*start)++ = c;
 231         else {
 232             while ((c = (unsigned char) *s) &&
 233 #ifdef LOCALE
 234                     (iscntrl(c) || isspace(c)))
 235 #else
 236                     (c <= 32))
 237 #endif
 238                 s++;
 239             *(*start)++ = ' ';
 240         }
 241 }
 242
 243 static char *lmonth[] = { "January",  "February","March",   "April",
 244                           "May",      "June",    "July",    "August",
 245                           "September","October", "November","December" };
 246
 247 static char *
 248 get_x400_friendly (char *mbox, char *buffer, int buffer_len)
 249 {
 250     char given[BUFSIZ], surname[BUFSIZ];
 251
 252     if (mbox == NULL)
 253         return NULL;
 254     if (*mbox == '"')
 255         mbox++;
 256     if (*mbox != '/')
 257         return NULL;
 258
 259     if (get_x400_comp (mbox, "/PN=", buffer, buffer_len)) {
 260         for (mbox = buffer; (mbox = strchr(mbox, '.')); )
 261             *mbox++ = ' ';
 262
 263         return buffer;
 264     }
 265
 266     if (!get_x400_comp (mbox, "/S=", surname, sizeof(surname)))
 267         return NULL;
 268
 269     if (get_x400_comp (mbox, "/G=", given, sizeof(given)))
 270         snprintf (buffer, buffer_len, "%s %s", given, surname);
 271     else
 272         snprintf (buffer, buffer_len, "%s", surname);
 273
 274     return buffer;
 275 }
 276
 277 static int
 278 get_x400_comp (char *mbox, char *key, char *buffer, int buffer_len)
 279 {
 280     int idx;
 281     char *cp;
 282
 283     if ((idx = stringdex (key, mbox)) < 0
 284             || !(cp = strchr(mbox += idx + strlen (key), '/')))
 285         return 0;
 286
 287     snprintf (buffer, buffer_len, "%*.*s", (int)(cp - mbox), (int)(cp - mbox), mbox);
 288     return 1;
 289 }
 290
 291 struct format *
 292 fmt_scan (struct format *format, char *scanl, int width, int *dat)
 293 {
 294     char *cp, *ep;
 295     unsigned char *sp;
 296     char *savestr = NULL;
 297     unsigned char *str = NULL;
 298     char buffer[BUFSIZ], buffer2[BUFSIZ];
 299     int i, c, ljust, n;
 300     int value = 0;
 301     time_t t;
 302     struct format *fmt;
 303     struct comp *comp;
 304     struct tws *tws;
 305     struct mailname *mn;
 306
 307     cp = scanl;
 308     ep = scanl + width - 1;
 309
 310     for (fmt = format; fmt->f_type != FT_DONE; fmt++)
 311         switch (fmt->f_type) {
 312         case FT_PARSEADDR:
 313         case FT_PARSEDATE:
 314             fmt->f_comp->c_flags &= ~CF_PARSED;
 315             break;
 316         }
 317
 318     fmt = format;
 319
 320     while (cp < ep) {
 321         switch (fmt->f_type) {
 322
 323         case FT_COMP:
 324             cpstripped (&cp, ep, fmt->f_comp->c_text);
 325             break;
 326         case FT_COMPF:
 327             cptrimmed (&cp, fmt->f_comp->c_text, fmt->f_width, fmt->f_fill, ep - cp);
 328             break;
 329
 330         case FT_LIT:
 331             sp = fmt->f_text;
 332             while( (c = *sp++) && cp < ep)
 333                 *cp++ = c;
 334             break;
 335         case FT_LITF:
 336             sp = fmt->f_text;
 337             ljust = 0;
 338             i = fmt->f_width;
 339             if (i < 0) {
 340                 i = -i;
 341                 ljust++;                /* XXX should do something with this */
 342             }
 343             while( (c = *sp++) && --i >= 0 && cp < ep)
 344                 *cp++ = c;
 345             while( --i >= 0 && cp < ep)
 346                 *cp++ = fmt->f_fill;
 347             break;
 348
 349         case FT_STR:
 350             cpstripped (&cp, ep, str);
 351             break;
 352         case FT_STRF:
 353             cptrimmed (&cp, str, fmt->f_width, fmt->f_fill, ep - cp);
 354             break;
 355         case FT_STRLIT:
 356             sp = str;
 357             while ((c = *sp++) && cp < ep)
 358                 *cp++ = c;
 359             break;
 360         case FT_STRFW:
 361             adios (NULL, "internal error (FT_STRFW)");
 362
 363         case FT_NUM:
 364             n = snprintf(cp, ep - cp + 1, "%d", value);
 365             if (n >= 0) {
 366                 if (n >= ep - cp) {
 367                     cp = ep;
 368                 } else
 369                     cp += n;
 370             }
 371             break;
 372         case FT_NUMF:
 373             cpnumber (&cp, value, fmt->f_width, fmt->f_fill, ep - cp);
 374             break;
 375
 376         case FT_CHAR:
 377             *cp++ = fmt->f_char;
 378             break;
 379
 380         case FT_DONE:
 381             goto finished;
 382
 383         case FT_IF_S:
 384             if (!(value = (str && *str))) {
 385                 fmt += fmt->f_skip;
 386                 continue;
 387             }
 388             break;
 389
 390         case FT_IF_S_NULL:
 391             if (!(value = (str == NULL || *str == 0))) {
 392                 fmt += fmt->f_skip;
 393                 continue;
 394             }
 395             break;
 396
 397         case FT_IF_V_EQ:
 398             if (value != fmt->f_value) {
 399                 fmt += fmt->f_skip;
 400                 continue;
 401             }
 402             break;
 403
 404         case FT_IF_V_NE:
 405             if (value == fmt->f_value) {
 406                 fmt += fmt->f_skip;
 407                 continue;
 408             }
 409             break;
 410
 411         case FT_IF_V_GT:
 412             if (value <= fmt->f_value) {
 413                 fmt += fmt->f_skip;
 414                 continue;
 415             }
 416             break;
 417
 418         case FT_IF_MATCH:
 419             if (!(value = (str && match (str, fmt->f_text)))) {
 420                 fmt += fmt->f_skip;
 421                 continue;
 422             }
 423             break;
 424
 425         case FT_V_MATCH:
 426             if (str)
 427                 value = match (str, fmt->f_text);
 428             else
 429                 value = 0;
 430             break;
 431
 432         case FT_IF_AMATCH:
 433             if (!(value = (str && uprf (str, fmt->f_text)))) {
 434                 fmt += fmt->f_skip;
 435                 continue;
 436             }
 437             break;
 438
 439         case FT_V_AMATCH:
 440             value = uprf (str, fmt->f_text);
 441             break;
 442
 443         case FT_S_NONNULL:
 444             value = (str != NULL && *str != 0);
 445             break;
 446
 447         case FT_S_NULL:
 448             value = (str == NULL || *str == 0);
 449             break;
 450
 451         case FT_V_EQ:
 452             value = (fmt->f_value == value);
 453             break;
 454
 455         case FT_V_NE:
 456             value = (fmt->f_value != value);
 457             break;
 458
 459         case FT_V_GT:
 460             value = (fmt->f_value > value);
 461             break;
 462
 463         case FT_GOTO:
 464             fmt += fmt->f_skip;
 465             continue;
 466
 467         case FT_NOP:
 468             break;
 469
 470         case FT_LS_COMP:
 471             str = fmt->f_comp->c_text;
 472             break;
 473         case FT_LS_LIT:
 474             str = fmt->f_text;
 475             break;
 476         case FT_LS_GETENV:
 477             if (!(str = getenv (fmt->f_text)))
 478                 str = "";
 479             break;
 480         case FT_LS_CFIND:
 481             if (!(str = context_find (fmt->f_text)))
 482                 str = "";
 483             break;
 484
 485         case FT_LS_DECODECOMP:
 486             if (decode_rfc2047(fmt->f_comp->c_text, buffer2, sizeof(buffer2)))
 487                 str = buffer2;
 488             else
 489                 str = fmt->f_comp->c_text;
 490             break;
 491
 492         case FT_LS_DECODE:
 493             if (str && decode_rfc2047(str, buffer2, sizeof(buffer2)))
 494                 str = buffer2;
 495             break;
 496
 497         case FT_LS_TRIM:
 498             if (str) {
 499                     unsigned char *xp;
 500
 501                     strncpy(buffer, str, sizeof(buffer));
 502                     buffer[sizeof(buffer)-1] = '\0';
 503                     str = buffer;
 504                     while (isspace(*str))
 505                             str++;
 506                     ljust = 0;
 507                     if ((i = fmt->f_width) < 0) {
 508                             i = -i;
 509                             ljust++;
 510                     }
 511
 512                     if (!ljust && i > 0 && (int) strlen(str) > i)
 513                             str[i] = '\0';
 514                     xp = str;
 515                     xp += strlen(str) - 1;
 516                     while (xp > str && isspace(*xp))
 517                             *xp-- = '\0';
 518                     if (ljust && i > 0 && (int) strlen(str) > i)
 519                         str += strlen(str) - i;
 520             }
 521             break;
 522
 523         case FT_LV_COMPFLAG:
 524             value = (fmt->f_comp->c_flags & CF_TRUE) != 0;
 525             break;
 526         case FT_LV_COMP:
 527             value = (comp = fmt->f_comp)->c_text ? atoi(comp->c_text) : 0;
 528             break;
 529         case FT_LV_LIT:
 530             value = fmt->f_value;
 531             break;
 532         case FT_LV_DAT:
 533             value = dat[fmt->f_value];
 534             break;
 535         case FT_LV_STRLEN:
 536             if (str != NULL)
 537                     value = strlen(str);
 538             else
 539                     value = 0;
 540             break;
 541         case FT_LV_CHAR_LEFT:
 542             value = width - (cp - scanl);
 543             break;
 544         case FT_LV_PLUS_L:
 545             value += fmt->f_value;
 546             break;
 547         case FT_LV_MINUS_L:
 548             value = fmt->f_value - value;
 549             break;
 550         case FT_LV_DIVIDE_L:
 551             if (fmt->f_value)
 552                 value = value / fmt->f_value;
 553             else
 554                 value = 0;
 555             break;
 556         case FT_LV_MODULO_L:
 557             if (fmt->f_value)
 558                 value = value % fmt->f_value;
 559             else
 560                 value = 0;
 561             break;
 562         case FT_SAVESTR:
 563             savestr = str;
 564             break;
 565
 566         case FT_LV_SEC:
 567             value = fmt->f_comp->c_tws->tw_sec;
 568             break;
 569         case FT_LV_MIN:
 570             value = fmt->f_comp->c_tws->tw_min;
 571             break;
 572         case FT_LV_HOUR:
 573             value = fmt->f_comp->c_tws->tw_hour;
 574             break;
 575         case FT_LV_MDAY:
 576             value = fmt->f_comp->c_tws->tw_mday;
 577             break;
 578         case FT_LV_MON:
 579             value = fmt->f_comp->c_tws->tw_mon + 1;
 580             break;
 581         case FT_LS_MONTH:
 582             str = tw_moty[fmt->f_comp->c_tws->tw_mon];
 583             break;
 584         case FT_LS_LMONTH:
 585             str = lmonth[fmt->f_comp->c_tws->tw_mon];
 586             break;
 587         case FT_LS_ZONE:
 588             str = dtwszone (fmt->f_comp->c_tws);
 589             break;
 590         case FT_LV_YEAR:
 591             value = fmt->f_comp->c_tws->tw_year;
 592             break;
 593         case FT_LV_WDAY:
 594             if (!(((tws = fmt->f_comp->c_tws)->tw_flags) & (TW_SEXP|TW_SIMP)))
 595                 set_dotw (tws);
 596             value = tws->tw_wday;
 597             break;
 598         case FT_LS_DAY:
 599             if (!(((tws = fmt->f_comp->c_tws)->tw_flags) & (TW_SEXP|TW_SIMP)))
 600                 set_dotw (tws);
 601             str = tw_dotw[tws->tw_wday];
 602             break;
 603         case FT_LS_WEEKDAY:
 604             if (!(((tws = fmt->f_comp->c_tws)->tw_flags) & (TW_SEXP|TW_SIMP)))
 605                 set_dotw (tws);
 606             str = tw_ldotw[tws->tw_wday];
 607             break;
 608         case FT_LV_YDAY:
 609             value = fmt->f_comp->c_tws->tw_yday;
 610             break;
 611         case FT_LV_ZONE:
 612             value = fmt->f_comp->c_tws->tw_zone;
 613             break;
 614         case FT_LV_CLOCK:
 615             if ((value = fmt->f_comp->c_tws->tw_clock) == 0)
 616                 value = dmktime(fmt->f_comp->c_tws);
 617             break;
 618         case FT_LV_RCLOCK:
 619             if ((value = fmt->f_comp->c_tws->tw_clock) == 0)
 620                 value = dmktime(fmt->f_comp->c_tws);
 621             value = time((time_t *) 0) - value;
 622             break;
 623         case FT_LV_DAYF:
 624             if (!(((tws = fmt->f_comp->c_tws)->tw_flags) & (TW_SEXP|TW_SIMP)))
 625                 set_dotw (tws);
 626             switch (fmt->f_comp->c_tws->tw_flags & TW_SDAY) {
 627                 case TW_SEXP:
 628                     value = 1; break;
 629                 case TW_SIMP:
 630                     value = 0; break;
 631                 default:
 632                     value = -1; break;
 633             }
 634         case FT_LV_ZONEF:
 635             if ((fmt->f_comp->c_tws->tw_flags & TW_SZONE) == TW_SZEXP)
 636                     value = 1;
 637             else
 638                     value = -1;
 639             break;
 640         case FT_LV_DST:
 641             value = fmt->f_comp->c_tws->tw_flags & TW_DST;
 642             break;
 643         case FT_LS_822DATE:
 644             str = dasctime (fmt->f_comp->c_tws , TW_ZONE);
 645             break;
 646         case FT_LS_PRETTY:
 647             str = dasctime (fmt->f_comp->c_tws, TW_NULL);
 648             break;
 649
 650         case FT_LS_PERS:
 651             str = fmt->f_comp->c_mn->m_pers;
 652             break;
 653         case FT_LS_MBOX:
 654             str = fmt->f_comp->c_mn->m_mbox;
 655             break;
 656         case FT_LS_HOST:
 657             str = fmt->f_comp->c_mn->m_host;
 658             break;
 659         case FT_LS_PATH:
 660             str = fmt->f_comp->c_mn->m_path;
 661             break;
 662         case FT_LS_GNAME:
 663             str = fmt->f_comp->c_mn->m_gname;
 664             break;
 665         case FT_LS_NOTE:
 666             str = fmt->f_comp->c_mn->m_note;
 667             break;
 668         case FT_LS_822ADDR:
 669             str = adrformat( fmt->f_comp->c_mn );
 670             break;
 671         case FT_LV_HOSTTYPE:
 672             value = fmt->f_comp->c_mn->m_type;
 673             break;
 674         case FT_LV_INGRPF:
 675             value = fmt->f_comp->c_mn->m_ingrp;
 676             break;
 677         case FT_LV_NOHOSTF:
 678             value = fmt->f_comp->c_mn->m_nohost;
 679             break;
 680         case FT_LS_ADDR:
 681         case FT_LS_FRIENDLY:
 682             if ((mn = fmt->f_comp->c_mn) == &fmt_mnull) {
 683                 str = fmt->f_comp->c_text;
 684                 break;
 685             }
 686             if (fmt->f_type == FT_LS_ADDR)
 687                 goto unfriendly;
 688             if ((str = mn->m_pers) == NULL) {
 689                 if ((str = mn->m_note)) {
 690                     strncpy (buffer, str, sizeof(buffer));
 691                     buffer[sizeof(buffer)-1] = '\0';
 692                     str = buffer;
 693                     if (*str == '(')
 694                         str++;
 695                     sp = str + strlen(str) - 1;
 696                     if (*sp == ')') {
 697                         *sp-- = '\0';
 698                         while (sp >= str)
 699                             if (*sp == ' ')
 700                                 *sp-- = '\0';
 701                             else
 702                                 break;
 703                     }
 704                 } else if (!(str = get_x400_friendly (mn->m_mbox,
 705                                 buffer, sizeof(buffer)))) {
 706         unfriendly: ;
 707                   switch (mn->m_type) {
 708                     case LOCALHOST:
 709                         str = mn->m_mbox;
 710                         break;
 711                     case UUCPHOST:
 712                         snprintf (buffer, sizeof(buffer), "%s!%s",
 713                                 mn->m_host, mn->m_mbox);
 714                         str = buffer;
 715                         break;
 716                     default:
 717                         if (mn->m_mbox) {
 718                             snprintf (buffer, sizeof(buffer), "%s@%s",
 719                                 mn->m_mbox, mn->m_host);
 720                             str= buffer;
 721                         }
 722                         else
 723                             str = mn->m_text;
 724                         break;
 725                   }
 726                 }
 727             }
 728             break;
 729
 730
 731                 /* UNQUOTEs RFC-2822 quoted-string and quoted-pair */
 732         case FT_LS_UNQUOTE:
 733             if (str) {
 734                 int m;
 735                 strncpy(buffer, str, sizeof(buffer));
 736                 /* strncpy doesn't NUL-terminate if it fills the buffer */
 737                 buffer[sizeof(buffer)-1] = '\0';
 738                 str = buffer;
 739
 740                 /* we will parse from buffer to buffer2 */
 741                 n = 0; /* n is the input position in str */
 742                 m = 0; /* m is the ouput position in buffer2 */
 743
 744                 while ( str[n] != '\0') {
 745                     switch ( str[n] ) {
 746                         case '\\':
 747                             n++;
 748                             if ( str[n] != '\0')
 749                                 buffer2[m++] = str[n++];
 750                             break;
 751                         case '"':
 752                             n++;
 753                             break;
 754                         default:
 755                             buffer2[m++] = str[n++];
 756                             break;
 757                         }
 758                 }
 759                 buffer2[m] = '\0';
 760                 str = buffer2;
 761             }
 762             break;
 763
 764         case FT_LOCALDATE:
 765             comp = fmt->f_comp;
 766             if ((t = comp->c_tws->tw_clock) == 0)
 767                 t = dmktime(comp->c_tws);
 768             tws = dlocaltime(&t);
 769             *comp->c_tws = *tws;
 770             break;
 771
 772         case FT_GMTDATE:
 773             comp = fmt->f_comp;
 774             if ((t = comp->c_tws->tw_clock) == 0)
 775                 t = dmktime(comp->c_tws);
 776             tws = dgmtime(&t);
 777             *comp->c_tws = *tws;
 778             break;
 779
 780         case FT_PARSEDATE:
 781             comp = fmt->f_comp;
 782             if (comp->c_flags & CF_PARSED)
 783                 break;
 784             if ((sp = comp->c_text) && (tws = dparsetime(sp))) {
 785                 *comp->c_tws = *tws;
 786                 comp->c_flags &= ~CF_TRUE;
 787             } else if ((comp->c_flags & CF_DATEFAB) == 0) {
 788                 memset ((char *) comp->c_tws, 0, sizeof *comp->c_tws);
 789                 comp->c_flags = CF_TRUE;
 790             }
 791             comp->c_flags |= CF_PARSED;
 792             break;
 793
 794         case FT_FORMATADDR:
 795             /* hook for custom address list formatting (see replsbr.c) */
 796             str = formataddr (savestr, str);
 797             break;
 798
 799         case FT_CONCATADDR:
 800             /* The same as formataddr, but doesn't do duplicate suppression */
 801             str = concataddr (savestr, str);
 802             break;
 803
 804         case FT_PUTADDR:
 805             /* output the str register as an address component,
 806              * splitting it into multiple lines if necessary.  The
 807              * value reg. contains the max line length.  The lit.
 808              * field may contain a string to prepend to the result
 809              * (e.g., "To: ")
 810              */
 811             {
 812             unsigned char *lp;
 813             char *lastb;
 814             int indent, wid, len;
 815
 816             lp = str;
 817             wid = value;
 818             len = strlen (str);
 819             sp = fmt->f_text;
 820             indent = strlen (sp);
 821             wid -= indent;
 822             if (wid <= 0) {
 823                 adios(NULL, "putaddr -- num register (%d) must be greater "
 824                             "than label width (%d)", value, indent);
 825             }
 826             while( (c = *sp++) && cp < ep)
 827                 *cp++ = c;
 828             while (len > wid) {
 829                 /* try to break at a comma; failing that, break at a
 830                  * space.
 831                  */
 832                 lastb = 0; sp = lp + wid;
 833                 while (sp > lp && (c = *--sp) != ',') {
 834                     if (! lastb && isspace(c))
 835                         lastb = sp - 1;
 836                 }
 837                 if (sp == lp) {
 838                     if (! (sp = lastb)) {
 839                         sp = lp + wid - 1;
 840                         while (*sp && *sp != ',' && !isspace(*sp))
 841                             sp++;
 842                         if (*sp != ',')
 843                             sp--;
 844                     }
 845                 }
 846                 len -= sp - lp + 1;
 847                 while (cp < ep && lp <= sp)
 848                     *cp++ = *lp++;
 849                 while (isspace(*lp))
 850                     lp++, len--;
 851                 if (*lp) {
 852                     if (cp < ep)
 853                         *cp++ = '\n';
 854                     for (i=indent; cp < ep && i > 0; i--)
 855                         *cp++ = ' ';
 856                 }
 857             }
 858             cpstripped (&cp, ep, lp);
 859             }
 860             break;
 861
 862         case FT_PARSEADDR:
 863             comp = fmt->f_comp;
 864             if (comp->c_flags & CF_PARSED)
 865                 break;
 866             if (comp->c_mn != &fmt_mnull)
 867                 mnfree (comp->c_mn);
 868             if ((sp = comp->c_text) && (sp = getname(sp)) &&
 869                 (mn = getm (sp, NULL, 0, fmt_norm, NULL))) {
 870                 comp->c_mn = mn;
 871                 while (getname(""))
 872                     ;
 873                 comp->c_flags |= CF_PARSED;
 874             } else {
 875                 while (getname(""))             /* XXX */
 876                     ;
 877                 comp->c_mn = &fmt_mnull;
 878             }
 879             break;
 880
 881         case FT_MYMBOX:
 882             /*
 883              * if there's no component, we say true.  Otherwise we
 884              * say "true" only if we can parse the address and it
 885              * matches one of our addresses.
 886              */
 887             comp = fmt->f_comp;
 888             if (comp->c_mn != &fmt_mnull)
 889                 mnfree (comp->c_mn);
 890             if ((sp = comp->c_text) && (sp = getname(sp)) &&
 891                 (mn = getm (sp, NULL, 0, AD_NAME, NULL))) {
 892                 comp->c_mn = mn;
 893                 if (ismymbox(mn))
 894                     comp->c_flags |= CF_TRUE;
 895                 else
 896                     comp->c_flags &= ~CF_TRUE;
 897                 while ((sp = getname(sp)))
 898                     if ((comp->c_flags & CF_TRUE) == 0 &&
 899                         (mn = getm (sp, NULL, 0, AD_NAME, NULL)))
 900                         if (ismymbox(mn))
 901                             comp->c_flags |= CF_TRUE;
 902             } else {
 903                 while (getname(""))             /* XXX */
 904                     ;
 905                 if (comp->c_text == 0)
 906                     comp->c_flags |= CF_TRUE;
 907                 else
 908                     comp->c_flags &= ~CF_TRUE;
 909                 comp->c_mn = &fmt_mnull;
 910             }
 911             break;
 912
 913         case FT_ADDTOSEQ:
 914 #ifdef LBL
 915             /* If we're working on a folder (as opposed to a file), add the
 916              * current msg to sequence given in literal field.  Don't
 917              * disturb string or value registers.
 918              */
 919             if (fmt_current_folder)
 920                     seq_addmsg(fmt_current_folder, fmt->f_text, dat[0], -1);
 921 #endif
 922             break;
 923         }
 924         fmt++;
 925     }
 926 #ifndef JLR
 927     finished:;
 928     if (cp[-1] != '\n')
 929         *cp++ = '\n';
 930     *cp   = 0;
 931     return ((struct format *)0);
 932 #else /* JLR */
 933     if (cp[-1] != '\n')
 934         *cp++ = '\n';
 935     while (fmt->f_type != FT_DONE)
 936         fmt++;
 937
 938     finished:;
 939     *cp = '\0';
 940     return (fmt->f_value ? ++fmt : (struct format *) 0);
 941
 942 #endif /* JLR */
 943 }