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