src/fcstr.c

   1 /*
   2  * fontconfig/src/fcstr.c
   3  *
   4  * Copyright © 2000 Keith Packard
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and its
   7  * documentation for any purpose is hereby granted without fee, provided that
   8  * the above copyright notice appear in all copies and that both that
   9  * copyright notice and this permission notice appear in supporting
  10  * documentation, and that the name of Keith Packard not be used in
  11  * advertising or publicity pertaining to distribution of the software without
  12  * specific, written prior permission.  Keith Packard makes no
  13  * representations about the suitability of this software for any purpose.  It
  14  * is provided "as is" without express or implied warranty.
  15  *
  16  * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  17  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  18  * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  19  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  22  * PERFORMANCE OF THIS SOFTWARE.
  23  */
  24
  25 #include "fcint.h"
  26 #include <stdlib.h>
  27 #include <ctype.h>
  28 #include <string.h>
  29 #ifdef _WIN32
  30 #include <windows.h>
  31 #endif
  32
  33 FcChar8 *
  34 FcStrCopy (const FcChar8 *s)
  35 {
  36     int     len;
  37     FcChar8 *r;
  38
  39     if (!s)
  40         return 0;
  41     len = strlen ((char *) s) + 1;
  42     r = (FcChar8 *) malloc (len);
  43     if (!r)
  44         return 0;
  45     FcMemAlloc (FC_MEM_STRING, len);
  46     memcpy (r, s, len);
  47     return r;
  48 }
  49
  50 FcChar8 *
  51 FcStrPlus (const FcChar8 *s1, const FcChar8 *s2)
  52 {
  53     int     l = strlen ((char *)s1) + strlen ((char *) s2) + 1;
  54     FcChar8 *s = malloc (l);
  55
  56     if (!s)
  57         return 0;
  58     FcMemAlloc (FC_MEM_STRING, l);
  59     strcpy ((char *) s, (char *) s1);
  60     strcat ((char *) s, (char *) s2);
  61     return s;
  62 }
  63
  64 void
  65 FcStrFree (FcChar8 *s)
  66 {
  67     FcMemFree (FC_MEM_STRING, strlen ((char *) s) + 1);
  68     free (s);
  69 }
  70
  71
  72 #include "../fc-case/fccase.h"
  73
  74 #define FcCaseFoldUpperCount(cf) \
  75     ((cf)->method == FC_CASE_FOLD_FULL ? 1 : (cf)->count)
  76
  77 #define FC_STR_CANON_BUF_LEN    1024
  78
  79 typedef struct _FcCaseWalker {
  80     const FcChar8   *read;
  81     const FcChar8   *src;
  82     FcChar8         utf8[FC_MAX_CASE_FOLD_CHARS + 1];
  83 } FcCaseWalker;
  84
  85 static void
  86 FcStrCaseWalkerInit (const FcChar8 *src, FcCaseWalker *w)
  87 {
  88     w->src = src;
  89     w->read = 0;
  90 }
  91
  92 static FcChar8
  93 FcStrCaseWalkerLong (FcCaseWalker *w, FcChar8 r)
  94 {
  95     FcChar32    ucs4;
  96     int         slen;
  97     int         len = strlen((char*)w->src);
  98
  99     slen = FcUtf8ToUcs4 (w->src - 1, &ucs4, len + 1);
 100     if (slen <= 0)
 101         return r;
 102     if (FC_MIN_FOLD_CHAR <= ucs4 && ucs4 <= FC_MAX_FOLD_CHAR)
 103     {
 104         int min = 0;
 105         int max = FC_NUM_CASE_FOLD;
 106
 107         while (min <= max)
 108         {
 109             int         mid = (min + max) >> 1;
 110             FcChar32    low = fcCaseFold[mid].upper;
 111             FcChar32    high = low + FcCaseFoldUpperCount (&fcCaseFold[mid]);
 112
 113             if (high <= ucs4)
 114                 min = mid + 1;
 115             else if (ucs4 < low)
 116                 max = mid - 1;
 117             else
 118             {
 119                 const FcCaseFold    *fold = &fcCaseFold[mid];
 120                 int                 dlen;
 121
 122                 switch (fold->method) {
 123                 case  FC_CASE_FOLD_EVEN_ODD:
 124                     if ((ucs4 & 1) != (fold->upper & 1))
 125                         return r;
 126                     /* fall through ... */
 127                 default:
 128                     dlen = FcUcs4ToUtf8 (ucs4 + fold->offset, w->utf8);
 129                     break;
 130                 case FC_CASE_FOLD_FULL:
 131                     dlen = fold->count;
 132                     memcpy (w->utf8, fcCaseFoldChars + fold->offset, dlen);
 133                     break;
 134                 }
 135
 136                 /* consume rest of src utf-8 bytes */
 137                 w->src += slen - 1;
 138
 139                 /* read from temp buffer */
 140                 w->utf8[dlen] = '\0';
 141                 w->read = w->utf8;
 142                 return *w->read++;
 143             }
 144         }
 145     }
 146     return r;
 147 }
 148
 149 static FcChar8
 150 FcStrCaseWalkerNext (FcCaseWalker *w)
 151 {
 152     FcChar8     r;
 153
 154     if (w->read)
 155     {
 156         if ((r = *w->read++))
 157             return r;
 158         w->read = 0;
 159     }
 160     r = *w->src++;
 161
 162     if ((r & 0xc0) == 0xc0)
 163         return FcStrCaseWalkerLong (w, r);
 164     if ('A' <= r && r <= 'Z')
 165         r = r - 'A' + 'a';
 166     return r;
 167 }
 168
 169 static FcChar8
 170 FcStrCaseWalkerNextIgnoreBlanks (FcCaseWalker *w)
 171 {
 172     FcChar8     r;
 173
 174     if (w->read)
 175     {
 176         if ((r = *w->read++))
 177             return r;
 178         w->read = 0;
 179     }
 180     do
 181     {
 182         r = *w->src++;
 183     } while (r == ' ');
 184
 185     if ((r & 0xc0) == 0xc0)
 186         return FcStrCaseWalkerLong (w, r);
 187     if ('A' <= r && r <= 'Z')
 188         r = r - 'A' + 'a';
 189     return r;
 190 }
 191
 192 FcChar8 *
 193 FcStrDowncase (const FcChar8 *s)
 194 {
 195     FcCaseWalker    w;
 196     int             len = 0;
 197     FcChar8         *dst, *d;
 198
 199     FcStrCaseWalkerInit (s, &w);
 200     while (FcStrCaseWalkerNext (&w))
 201         len++;
 202     d = dst = malloc (len + 1);
 203     if (!d)
 204         return 0;
 205     FcMemAlloc (FC_MEM_STRING, len + 1);
 206     FcStrCaseWalkerInit (s, &w);
 207     while ((*d++ = FcStrCaseWalkerNext (&w)));
 208     return dst;
 209 }
 210
 211 int
 212 FcStrCmpIgnoreCase (const FcChar8 *s1, const FcChar8 *s2)
 213 {
 214     FcCaseWalker    w1, w2;
 215     FcChar8         c1, c2;
 216
 217     if (s1 == s2) return 0;
 218
 219     FcStrCaseWalkerInit (s1, &w1);
 220     FcStrCaseWalkerInit (s2, &w2);
 221
 222     for (;;)
 223     {
 224         c1 = FcStrCaseWalkerNext (&w1);
 225         c2 = FcStrCaseWalkerNext (&w2);
 226         if (!c1 || (c1 != c2))
 227             break;
 228     }
 229     return (int) c1 - (int) c2;
 230 }
 231
 232 int
 233 FcStrCmpIgnoreBlanksAndCase (const FcChar8 *s1, const FcChar8 *s2)
 234 {
 235     FcCaseWalker    w1, w2;
 236     FcChar8         c1, c2;
 237
 238     if (s1 == s2) return 0;
 239
 240     FcStrCaseWalkerInit (s1, &w1);
 241     FcStrCaseWalkerInit (s2, &w2);
 242
 243     for (;;)
 244     {
 245         c1 = FcStrCaseWalkerNextIgnoreBlanks (&w1);
 246         c2 = FcStrCaseWalkerNextIgnoreBlanks (&w2);
 247         if (!c1 || (c1 != c2))
 248             break;
 249     }
 250     return (int) c1 - (int) c2;
 251 }
 252
 253 int
 254 FcStrCmp (const FcChar8 *s1, const FcChar8 *s2)
 255 {
 256     FcChar8 c1, c2;
 257
 258     if (s1 == s2)
 259         return 0;
 260     for (;;)
 261     {
 262         c1 = *s1++;
 263         c2 = *s2++;
 264         if (!c1 || c1 != c2)
 265             break;
 266     }
 267     return (int) c1 - (int) c2;
 268 }
 269
 270 /*
 271  * Return a hash value for a string
 272  */
 273
 274 FcChar32
 275 FcStrHashIgnoreCase (const FcChar8 *s)
 276 {
 277     FcChar32        h = 0;
 278     FcCaseWalker    w;
 279     FcChar8         c;
 280
 281     FcStrCaseWalkerInit (s, &w);
 282     while ((c = FcStrCaseWalkerNext (&w)))
 283         h = ((h << 3) ^ (h >> 3)) ^ c;
 284     return h;
 285 }
 286
 287 /*
 288  * Is the head of s1 equal to s2?
 289  */
 290
 291 static FcBool
 292 FcStrIsAtIgnoreBlanksAndCase (const FcChar8 *s1, const FcChar8 *s2)
 293 {
 294     FcCaseWalker    w1, w2;
 295     FcChar8         c1, c2;
 296
 297     FcStrCaseWalkerInit (s1, &w1);
 298     FcStrCaseWalkerInit (s2, &w2);
 299
 300     for (;;)
 301     {
 302         c1 = FcStrCaseWalkerNextIgnoreBlanks (&w1);
 303         c2 = FcStrCaseWalkerNextIgnoreBlanks (&w2);
 304         if (!c1 || (c1 != c2))
 305             break;
 306     }
 307     return c1 == c2 || !c2;
 308 }
 309
 310 /*
 311  * Does s1 contain an instance of s2 (ignoring blanks and case)?
 312  */
 313
 314 const FcChar8 *
 315 FcStrContainsIgnoreBlanksAndCase (const FcChar8 *s1, const FcChar8 *s2)
 316 {
 317     while (*s1)
 318     {
 319         if (FcStrIsAtIgnoreBlanksAndCase (s1, s2))
 320             return s1;
 321         s1++;
 322     }
 323     return 0;
 324 }
 325
 326 static FcBool
 327 FcCharIsPunct (const FcChar8 c)
 328 {
 329     if (c < '0')
 330         return FcTrue;
 331     if (c <= '9')
 332         return FcFalse;
 333     if (c < 'A')
 334         return FcTrue;
 335     if (c <= 'Z')
 336         return FcFalse;
 337     if (c < 'a')
 338         return FcTrue;
 339     if (c <= 'z')
 340         return FcFalse;
 341     if (c <= '~')
 342         return FcTrue;
 343     return FcFalse;
 344 }
 345
 346 /*
 347  * Is the head of s1 equal to s2?
 348  */
 349
 350 static FcBool
 351 FcStrIsAtIgnoreCase (const FcChar8 *s1, const FcChar8 *s2)
 352 {
 353     FcCaseWalker    w1, w2;
 354     FcChar8         c1, c2;
 355
 356     FcStrCaseWalkerInit (s1, &w1);
 357     FcStrCaseWalkerInit (s2, &w2);
 358
 359     for (;;)
 360     {
 361         c1 = FcStrCaseWalkerNext (&w1);
 362         c2 = FcStrCaseWalkerNext (&w2);
 363         if (!c1 || (c1 != c2))
 364             break;
 365     }
 366     return c1 == c2 || !c2;
 367 }
 368
 369 /*
 370  * Does s1 contain an instance of s2 (ignoring blanks and case)?
 371  */
 372
 373 const FcChar8 *
 374 FcStrContainsIgnoreCase (const FcChar8 *s1, const FcChar8 *s2)
 375 {
 376     while (*s1)
 377     {
 378         if (FcStrIsAtIgnoreCase (s1, s2))
 379             return s1;
 380         s1++;
 381     }
 382     return 0;
 383 }
 384
 385 /*
 386  * Does s1 contain an instance of s2 on a word boundary (ignoring case)?
 387  */
 388
 389 const FcChar8 *
 390 FcStrContainsWord (const FcChar8 *s1, const FcChar8 *s2)
 391 {
 392     FcBool  wordStart = FcTrue;
 393     int     s1len = strlen ((char *) s1);
 394     int     s2len = strlen ((char *) s2);
 395
 396     while (s1len >= s2len)
 397     {
 398         if (wordStart &&
 399             FcStrIsAtIgnoreCase (s1, s2) &&
 400             (s1len == s2len || FcCharIsPunct (s1[s2len])))
 401         {
 402             return s1;
 403         }
 404         wordStart = FcFalse;
 405         if (FcCharIsPunct (*s1))
 406             wordStart = FcTrue;
 407         s1++;
 408         s1len--;
 409     }
 410     return 0;
 411 }
 412
 413 const FcChar8 *
 414 FcStrStrIgnoreCase (const FcChar8 *s1, const FcChar8 *s2)
 415 {
 416     FcCaseWalker    w1, w2;
 417     FcChar8         c1, c2;
 418     const FcChar8   *cur;
 419
 420     if (!s1 || !s2)
 421         return 0;
 422
 423     if (s1 == s2)
 424         return s1;
 425
 426     FcStrCaseWalkerInit (s1, &w1);
 427     FcStrCaseWalkerInit (s2, &w2);
 428
 429     c2 = FcStrCaseWalkerNext (&w2);
 430
 431     for (;;)
 432     {
 433         cur = w1.src;
 434         c1 = FcStrCaseWalkerNext (&w1);
 435         if (!c1)
 436             break;
 437         if (c1 == c2)
 438         {
 439             FcCaseWalker    w1t = w1;
 440             FcCaseWalker    w2t = w2;
 441             FcChar8         c1t, c2t;
 442
 443             for (;;)
 444             {
 445                 c1t = FcStrCaseWalkerNext (&w1t);
 446                 c2t = FcStrCaseWalkerNext (&w2t);
 447
 448                 if (!c2t)
 449                     return cur;
 450                 if (c2t != c1t)
 451                     break;
 452             }
 453         }
 454     }
 455     return 0;
 456 }
 457
 458 const FcChar8 *
 459 FcStrStr (const FcChar8 *s1, const FcChar8 *s2)
 460 {
 461     FcChar8 c1, c2;
 462     const FcChar8 * p = s1;
 463     const FcChar8 * b = s2;
 464
 465     if (!s1 || !s2)
 466         return 0;
 467
 468     if (s1 == s2)
 469         return s1;
 470
 471 again:
 472     c2 = *s2++;
 473
 474     if (!c2)
 475         return 0;
 476
 477     for (;;)
 478     {
 479         p = s1;
 480         c1 = *s1++;
 481         if (!c1 || c1 == c2)
 482             break;
 483     }
 484
 485     if (c1 != c2)
 486         return 0;
 487
 488     for (;;)
 489     {
 490         c1 = *s1;
 491         c2 = *s2;
 492         if (c1 && c2 && c1 != c2)
 493         {
 494             s1 = p + 1;
 495             s2 = b;
 496             goto again;
 497         }
 498         if (!c2)
 499             return p;
 500         if (!c1)
 501             return 0;
 502         ++ s1;
 503         ++ s2;
 504     }
 505     /* never reached. */
 506 }
 507
 508 int
 509 FcUtf8ToUcs4 (const FcChar8 *src_orig,
 510               FcChar32      *dst,
 511               int           len)
 512 {
 513     const FcChar8   *src = src_orig;
 514     FcChar8         s;
 515     int             extra;
 516     FcChar32        result;
 517
 518     if (len == 0)
 519         return 0;
 520
 521     s = *src++;
 522     len--;
 523
 524     if (!(s & 0x80))
 525     {
 526         result = s;
 527         extra = 0;
 528     }
 529     else if (!(s & 0x40))
 530     {
 531         return -1;
 532     }
 533     else if (!(s & 0x20))
 534     {
 535         result = s & 0x1f;
 536         extra = 1;
 537     }
 538     else if (!(s & 0x10))
 539     {
 540         result = s & 0xf;
 541         extra = 2;
 542     }
 543     else if (!(s & 0x08))
 544     {
 545         result = s & 0x07;
 546         extra = 3;
 547     }
 548     else if (!(s & 0x04))
 549     {
 550         result = s & 0x03;
 551         extra = 4;
 552     }
 553     else if ( ! (s & 0x02))
 554     {
 555         result = s & 0x01;
 556         extra = 5;
 557     }
 558     else
 559     {
 560         return -1;
 561     }
 562     if (extra > len)
 563         return -1;
 564
 565     while (extra--)
 566     {
 567         result <<= 6;
 568         s = *src++;
 569
 570         if ((s & 0xc0) != 0x80)
 571             return -1;
 572
 573         result |= s & 0x3f;
 574     }
 575     *dst = result;
 576     return src - src_orig;
 577 }
 578
 579 FcBool
 580 FcUtf8Len (const FcChar8    *string,
 581            int              len,
 582            int              *nchar,
 583            int              *wchar)
 584 {
 585     int         n;
 586     int         clen;
 587     FcChar32    c;
 588     FcChar32    max;
 589
 590     n = 0;
 591     max = 0;
 592     while (len)
 593     {
 594         clen = FcUtf8ToUcs4 (string, &c, len);
 595         if (clen <= 0)  /* malformed UTF8 string */
 596             return FcFalse;
 597         if (c > max)
 598             max = c;
 599         string += clen;
 600         len -= clen;
 601         n++;
 602     }
 603     *nchar = n;
 604     if (max >= 0x10000)
 605         *wchar = 4;
 606     else if (max > 0x100)
 607         *wchar = 2;
 608     else
 609         *wchar = 1;
 610     return FcTrue;
 611 }
 612
 613 int
 614 FcUcs4ToUtf8 (FcChar32  ucs4,
 615               FcChar8   dest[FC_UTF8_MAX_LEN])
 616 {
 617     int bits;
 618     FcChar8 *d = dest;
 619
 620     if      (ucs4 <       0x80) {  *d++=  ucs4;                         bits= -6; }
 621     else if (ucs4 <      0x800) {  *d++= ((ucs4 >>  6) & 0x1F) | 0xC0;  bits=  0; }
 622     else if (ucs4 <    0x10000) {  *d++= ((ucs4 >> 12) & 0x0F) | 0xE0;  bits=  6; }
 623     else if (ucs4 <   0x200000) {  *d++= ((ucs4 >> 18) & 0x07) | 0xF0;  bits= 12; }
 624     else if (ucs4 <  0x4000000) {  *d++= ((ucs4 >> 24) & 0x03) | 0xF8;  bits= 18; }
 625     else if (ucs4 < 0x80000000) {  *d++= ((ucs4 >> 30) & 0x01) | 0xFC;  bits= 24; }
 626     else return 0;
 627
 628     for ( ; bits >= 0; bits-= 6) {
 629         *d++= ((ucs4 >> bits) & 0x3F) | 0x80;
 630     }
 631     return d - dest;
 632 }
 633
 634 #define GetUtf16(src,endian) \
 635     ((FcChar16) ((src)[endian == FcEndianBig ? 0 : 1] << 8) | \
 636      (FcChar16) ((src)[endian == FcEndianBig ? 1 : 0]))
 637
 638 int
 639 FcUtf16ToUcs4 (const FcChar8    *src_orig,
 640                FcEndian         endian,
 641                FcChar32         *dst,
 642                int              len)    /* in bytes */
 643 {
 644     const FcChar8   *src = src_orig;
 645     FcChar16        a, b;
 646     FcChar32        result;
 647
 648     if (len < 2)
 649         return 0;
 650
 651     a = GetUtf16 (src, endian); src += 2; len -= 2;
 652
 653     /*
 654      * Check for surrogate
 655      */
 656     if ((a & 0xfc00) == 0xd800)
 657     {
 658         if (len < 2)
 659             return 0;
 660         b = GetUtf16 (src, endian); src += 2; len -= 2;
 661         /*
 662          * Check for invalid surrogate sequence
 663          */
 664         if ((b & 0xfc00) != 0xdc00)
 665             return 0;
 666         result = ((((FcChar32) a & 0x3ff) << 10) |
 667                   ((FcChar32) b & 0x3ff)) + 0x10000;
 668     }
 669     else
 670         result = a;
 671     *dst = result;
 672     return src - src_orig;
 673 }
 674
 675 FcBool
 676 FcUtf16Len (const FcChar8   *string,
 677             FcEndian        endian,
 678             int             len,        /* in bytes */
 679             int             *nchar,
 680             int             *wchar)
 681 {
 682     int         n;
 683     int         clen;
 684     FcChar32    c;
 685     FcChar32    max;
 686
 687     n = 0;
 688     max = 0;
 689     while (len)
 690     {
 691         clen = FcUtf16ToUcs4 (string, endian, &c, len);
 692         if (clen <= 0)  /* malformed UTF8 string */
 693             return FcFalse;
 694         if (c > max)
 695             max = c;
 696         string += clen;
 697         len -= clen;
 698         n++;
 699     }
 700     *nchar = n;
 701     if (max >= 0x10000)
 702         *wchar = 4;
 703     else if (max > 0x100)
 704         *wchar = 2;
 705     else
 706         *wchar = 1;
 707     return FcTrue;
 708 }
 709
 710 void
 711 FcStrBufInit (FcStrBuf *buf, FcChar8 *init, int size)
 712 {
 713     buf->buf = init;
 714     buf->allocated = FcFalse;
 715     buf->failed = FcFalse;
 716     buf->len = 0;
 717     buf->size = size;
 718 }
 719
 720 void
 721 FcStrBufDestroy (FcStrBuf *buf)
 722 {
 723     if (buf->allocated)
 724     {
 725         FcMemFree (FC_MEM_STRBUF, buf->size);
 726         free (buf->buf);
 727         FcStrBufInit (buf, 0, 0);
 728     }
 729 }
 730
 731 FcChar8 *
 732 FcStrBufDone (FcStrBuf *buf)
 733 {
 734     FcChar8 *ret;
 735
 736     if (buf->failed)
 737         ret = NULL;
 738     else
 739         ret = malloc (buf->len + 1);
 740     if (ret)
 741     {
 742         FcMemAlloc (FC_MEM_STRING, buf->len + 1);
 743         memcpy (ret, buf->buf, buf->len);
 744         ret[buf->len] = '\0';
 745     }
 746     FcStrBufDestroy (buf);
 747     return ret;
 748 }
 749
 750 FcBool
 751 FcStrBufChar (FcStrBuf *buf, FcChar8 c)
 752 {
 753     if (buf->len == buf->size)
 754     {
 755         FcChar8     *new;
 756         int         size;
 757
 758         if (buf->failed)
 759             return FcFalse;
 760
 761         if (buf->allocated)
 762         {
 763             size = buf->size * 2;
 764             new = realloc (buf->buf, size);
 765         }
 766         else
 767         {
 768             size = buf->size + 64;
 769             new = malloc (size);
 770             if (new)
 771             {
 772                 buf->allocated = FcTrue;
 773                 memcpy (new, buf->buf, buf->len);
 774             }
 775         }
 776         if (!new)
 777         {
 778             buf->failed = FcTrue;
 779             return FcFalse;
 780         }
 781         if (buf->size)
 782             FcMemFree (FC_MEM_STRBUF, buf->size);
 783         FcMemAlloc (FC_MEM_STRBUF, size);
 784         buf->size = size;
 785         buf->buf = new;
 786     }
 787     buf->buf[buf->len++] = c;
 788     return FcTrue;
 789 }
 790
 791 FcBool
 792 FcStrBufString (FcStrBuf *buf, const FcChar8 *s)
 793 {
 794     FcChar8 c;
 795     while ((c = *s++))
 796         if (!FcStrBufChar (buf, c))
 797             return FcFalse;
 798     return FcTrue;
 799 }
 800
 801 FcBool
 802 FcStrBufData (FcStrBuf *buf, const FcChar8 *s, int len)
 803 {
 804     while (len-- > 0)
 805         if (!FcStrBufChar (buf, *s++))
 806             return FcFalse;
 807     return FcTrue;
 808 }
 809
 810 FcBool
 811 FcStrUsesHome (const FcChar8 *s)
 812 {
 813     return *s == '~';
 814 }
 815
 816 FcChar8 *
 817 FcStrCopyFilename (const FcChar8 *s)
 818 {
 819     FcChar8 *new;
 820
 821     if (*s == '~')
 822     {
 823         FcChar8 *home = FcConfigHome ();
 824         FcChar8 *full;
 825         int     size;
 826         if (!home)
 827             return 0;
 828         size = strlen ((char *) home) + strlen ((char *) s);
 829         full = (FcChar8 *) malloc (size);
 830         if (!full)
 831             return 0;
 832         strcpy ((char *) full, (char *) home);
 833         strcat ((char *) full, (char *) s + 1);
 834         new = FcStrCanonFilename (full);
 835         free (full);
 836     }
 837     else
 838         new = FcStrCanonFilename (s);
 839     return new;
 840 }
 841
 842 FcChar8 *
 843 FcStrLastSlash (const FcChar8  *path)
 844 {
 845     FcChar8         *slash;
 846
 847     slash = (FcChar8 *) strrchr ((const char *) path, '/');
 848 #ifdef _WIN32
 849     {
 850         FcChar8     *backslash;
 851
 852         backslash = (FcChar8 *) strrchr ((const char *) path, '\\');
 853         if (!slash || (backslash && backslash > slash))
 854             slash = backslash;
 855     }
 856 #endif
 857
 858     return slash;
 859 }
 860
 861 FcChar8 *
 862 FcStrDirname (const FcChar8 *file)
 863 {
 864     FcChar8 *slash;
 865     FcChar8 *dir;
 866
 867     slash = FcStrLastSlash (file);
 868     if (!slash)
 869         return FcStrCopy ((FcChar8 *) ".");
 870     dir = malloc ((slash - file) + 1);
 871     if (!dir)
 872         return 0;
 873     FcMemAlloc (FC_MEM_STRING, (slash - file) + 1);
 874     strncpy ((char *) dir, (const char *) file, slash - file);
 875     dir[slash - file] = '\0';
 876     return dir;
 877 }
 878
 879 FcChar8 *
 880 FcStrBasename (const FcChar8 *file)
 881 {
 882     FcChar8 *slash;
 883
 884     slash = FcStrLastSlash (file);
 885     if (!slash)
 886         return FcStrCopy (file);
 887     return FcStrCopy (slash + 1);
 888 }
 889
 890 static FcChar8 *
 891 FcStrCanonAbsoluteFilename (const FcChar8 *s)
 892 {
 893     FcChar8 *file;
 894     FcChar8 *f;
 895     const FcChar8 *slash;
 896     int size;
 897
 898     size = strlen ((char *) s) + 1;
 899     file = malloc (size);
 900     if (!file)
 901         return NULL;
 902     FcMemAlloc (FC_MEM_STRING, size);
 903     slash = NULL;
 904     f = file;
 905     for (;;) {
 906         if (*s == '/' || *s == '\0')
 907         {
 908             if (slash)
 909             {
 910                 switch (s - slash) {
 911                 case 1:
 912                     f -= 1;     /* squash // and trim final / from file */
 913                     break;
 914                 case 2:
 915                     if (!strncmp ((char *) slash, "/.", 2))
 916                     {
 917                         f -= 2; /* trim /. from file */
 918                     }
 919                     break;
 920                 case 3:
 921                     if (!strncmp ((char *) slash, "/..", 3))
 922                     {
 923                         f -= 3; /* trim /.. from file */
 924                         while (f > file) {
 925                             if (*--f == '/')
 926                                 break;
 927                         }
 928                     }
 929                     break;
 930                 }
 931             }
 932             slash = s;
 933         }
 934         if (!(*f++ = *s++))
 935             break;
 936     }
 937     return file;
 938 }
 939
 940 #ifdef _WIN32
 941 /*
 942  * Convert '\\' to '/' , remove double '/'
 943  */
 944 static void
 945 FcConvertDosPath (char *str)
 946 {
 947   size_t len = strlen (str);
 948   char *p = str;
 949   char *dest = str;
 950   char *end = str + len;
 951   char last = 0;
 952
 953   if (*p == '\\')
 954     {
 955       *p = '/';
 956       p++;
 957       dest++;
 958     }
 959   while (p < end)
 960     {
 961       if (*p == '\\')
 962         *p = '/';
 963
 964       if (*p != '/'
 965           || last != '/')
 966         {
 967           *dest++ = *p;
 968         }
 969
 970       last = *p;
 971       p++;
 972     }
 973
 974   *dest = 0;
 975 }
 976 #endif
 977
 978 FcChar8 *
 979 FcStrCanonFilename (const FcChar8 *s)
 980 {
 981 #ifdef _WIN32
 982     FcChar8 full[FC_MAX_FILE_LEN + 2];
 983     int size = GetFullPathName (s, sizeof (full) -1,
 984                                 full, NULL);
 985
 986     if (size == 0)
 987         perror ("GetFullPathName");
 988
 989     FcConvertDosPath (full);
 990     return FcStrCanonAbsoluteFilename (full);
 991 #else
 992     if (s[0] == '/')
 993         return FcStrCanonAbsoluteFilename (s);
 994     else
 995     {
 996         FcChar8 *full;
 997         FcChar8 *file;
 998
 999         FcChar8 cwd[FC_MAX_FILE_LEN + 2];
1000         if (getcwd ((char *) cwd, FC_MAX_FILE_LEN) == NULL)
1001             return NULL;
1002         strcat ((char *) cwd, "/");
1003         full = FcStrPlus (cwd, s);
1004         file = FcStrCanonAbsoluteFilename (full);
1005         FcStrFree (full);
1006         return file;
1007     }
1008 #endif
1009 }
1010
1011
1012 FcStrSet *
1013 FcStrSetCreate (void)
1014 {
1015     FcStrSet    *set = malloc (sizeof (FcStrSet));
1016     if (!set)
1017         return 0;
1018     FcMemAlloc (FC_MEM_STRSET, sizeof (FcStrSet));
1019     set->ref = 1;
1020     set->num = 0;
1021     set->size = 0;
1022     set->strs = 0;
1023     return set;
1024 }
1025
1026 static FcBool
1027 _FcStrSetAppend (FcStrSet *set, FcChar8 *s)
1028 {
1029     if (FcStrSetMember (set, s))
1030     {
1031         FcStrFree (s);
1032         return FcTrue;
1033     }
1034     if (set->num == set->size)
1035     {
1036         FcChar8 **strs = malloc ((set->size + 2) * sizeof (FcChar8 *));
1037
1038         if (!strs)
1039             return FcFalse;
1040         FcMemAlloc (FC_MEM_STRSET, (set->size + 2) * sizeof (FcChar8 *));
1041         if (set->num)
1042             memcpy (strs, set->strs, set->num * sizeof (FcChar8 *));
1043         if (set->strs)
1044         {
1045             FcMemFree (FC_MEM_STRSET, (set->size + 1) * sizeof (FcChar8 *));
1046             free (set->strs);
1047         }
1048         set->size = set->size + 1;
1049         set->strs = strs;
1050     }
1051     set->strs[set->num++] = s;
1052     set->strs[set->num] = 0;
1053     return FcTrue;
1054 }
1055
1056 FcBool
1057 FcStrSetMember (FcStrSet *set, const FcChar8 *s)
1058 {
1059     int i;
1060
1061     for (i = 0; i < set->num; i++)
1062         if (!FcStrCmp (set->strs[i], s))
1063             return FcTrue;
1064     return FcFalse;
1065 }
1066
1067 FcBool
1068 FcStrSetEqual (FcStrSet *sa, FcStrSet *sb)
1069 {
1070     int i;
1071     if (sa->num != sb->num)
1072         return FcFalse;
1073     for (i = 0; i < sa->num; i++)
1074         if (!FcStrSetMember (sb, sa->strs[i]))
1075             return FcFalse;
1076     return FcTrue;
1077 }
1078
1079 FcBool
1080 FcStrSetAdd (FcStrSet *set, const FcChar8 *s)
1081 {
1082     FcChar8 *new = FcStrCopy (s);
1083     if (!new)
1084         return FcFalse;
1085     if (!_FcStrSetAppend (set, new))
1086     {
1087         FcStrFree (new);
1088         return FcFalse;
1089     }
1090     return FcTrue;
1091 }
1092
1093 FcBool
1094 FcStrSetAddFilename (FcStrSet *set, const FcChar8 *s)
1095 {
1096     FcChar8 *new = FcStrCopyFilename (s);
1097     if (!new)
1098         return FcFalse;
1099     if (!_FcStrSetAppend (set, new))
1100     {
1101         FcStrFree (new);
1102         return FcFalse;
1103     }
1104     return FcTrue;
1105 }
1106
1107 FcBool
1108 FcStrSetDel (FcStrSet *set, const FcChar8 *s)
1109 {
1110     int i;
1111
1112     for (i = 0; i < set->num; i++)
1113         if (!FcStrCmp (set->strs[i], s))
1114         {
1115             FcStrFree (set->strs[i]);
1116             /*
1117              * copy remaining string pointers and trailing
1118              * NULL
1119              */
1120             memmove (&set->strs[i], &set->strs[i+1],
1121                      (set->num - i) * sizeof (FcChar8 *));
1122             set->num--;
1123             return FcTrue;
1124         }
1125     return FcFalse;
1126 }
1127
1128 void
1129 FcStrSetDestroy (FcStrSet *set)
1130 {
1131     if (--set->ref == 0)
1132     {
1133         int     i;
1134
1135         for (i = 0; i < set->num; i++)
1136             FcStrFree (set->strs[i]);
1137         if (set->strs)
1138         {
1139             FcMemFree (FC_MEM_STRSET, (set->size + 1) * sizeof (FcChar8 *));
1140             free (set->strs);
1141         }
1142         FcMemFree (FC_MEM_STRSET, sizeof (FcStrSet));
1143         free (set);
1144     }
1145 }
1146
1147 FcStrList *
1148 FcStrListCreate (FcStrSet *set)
1149 {
1150     FcStrList   *list;
1151
1152     list = malloc (sizeof (FcStrList));
1153     if (!list)
1154         return 0;
1155     FcMemAlloc (FC_MEM_STRLIST, sizeof (FcStrList));
1156     list->set = set;
1157     set->ref++;
1158     list->n = 0;
1159     return list;
1160 }
1161
1162 FcChar8 *
1163 FcStrListNext (FcStrList *list)
1164 {
1165     if (list->n >= list->set->num)
1166         return 0;
1167     return list->set->strs[list->n++];
1168 }
1169
1170 void
1171 FcStrListDone (FcStrList *list)
1172 {
1173     FcStrSetDestroy (list->set);
1174     FcMemFree (FC_MEM_STRLIST, sizeof (FcStrList));
1175     free (list);
1176 }
1177
1178 #define __fcstr__
1179 #include "fcaliastail.h"
1180 #undef __fcstr__