src/fcstr.c

   1 /*
   2  * $XFree86: xc/lib/fontconfig/src/fcstr.c,v 1.6 2002/07/06 23:47:44 keithp Exp $
   3  *
   4  * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
   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 <stdlib.h>
  26 #include <ctype.h>
  27 #include <string.h>
  28 #include "fcint.h"
  29
  30 FcChar8 *
  31 FcStrCopy (const FcChar8 *s)
  32 {
  33     FcChar8     *r;
  34
  35     if (!s)
  36         return 0;
  37     r = (FcChar8 *) malloc (strlen ((char *) s) + 1);
  38     if (!r)
  39         return 0;
  40     FcMemAlloc (FC_MEM_STRING, strlen ((char *) s) + 1);
  41     strcpy ((char *) r, (char *) s);
  42     return r;
  43 }
  44
  45 FcChar8 *
  46 FcStrPlus (const FcChar8 *s1, const FcChar8 *s2)
  47 {
  48     int     l = strlen ((char *)s1) + strlen ((char *) s2) + 1;
  49     FcChar8 *s = malloc (l);
  50
  51     if (!s)
  52         return 0;
  53     FcMemAlloc (FC_MEM_STRING, l);
  54     strcpy ((char *) s, (char *) s1);
  55     strcat ((char *) s, (char *) s2);
  56     return s;
  57 }
  58
  59 void
  60 FcStrFree (FcChar8 *s)
  61 {
  62     FcMemFree (FC_MEM_STRING, strlen ((char *) s) + 1);
  63     free (s);
  64 }
  65
  66 int
  67 FcStrCmpIgnoreCase (const FcChar8 *s1, const FcChar8 *s2)
  68 {
  69     FcChar8 c1, c2;
  70
  71     for (;;)
  72     {
  73         c1 = *s1++;
  74         c2 = *s2++;
  75         if (!c1 || !c2)
  76             break;
  77         c1 = FcToLower (c1);
  78         c2 = FcToLower (c2);
  79         if (c1 != c2)
  80             break;
  81     }
  82     return (int) c1 - (int) c2;
  83 }
  84
  85 int
  86 FcStrCmpIgnoreBlanksAndCase (const FcChar8 *s1, const FcChar8 *s2)
  87 {
  88     FcChar8 c1, c2;
  89
  90     for (;;)
  91     {
  92         do
  93             c1 = *s1++;
  94         while (c1 == ' ');
  95         do
  96             c2 = *s2++;
  97         while (c2 == ' ');
  98         if (!c1 || !c2)
  99             break;
 100         c1 = FcToLower (c1);
 101         c2 = FcToLower (c2);
 102         if (c1 != c2)
 103             break;
 104     }
 105     return (int) c1 - (int) c2;
 106 }
 107
 108 int
 109 FcStrCmp (const FcChar8 *s1, const FcChar8 *s2)
 110 {
 111     FcChar8 c1, c2;
 112
 113     if (s1 == s2)
 114         return 0;
 115     for (;;)
 116     {
 117         c1 = *s1++;
 118         c2 = *s2++;
 119         if (!c1 || !c2)
 120             break;
 121         if (c1 != c2)
 122             break;
 123     }
 124     return (int) c1 - (int) c2;
 125 }
 126
 127 int
 128 FcUtf8ToUcs4 (FcChar8   *src_orig,
 129               FcChar32  *dst,
 130               int       len)
 131 {
 132     FcChar8     *src = src_orig;
 133     FcChar8     s;
 134     int         extra;
 135     FcChar32    result;
 136
 137     if (len == 0)
 138         return 0;
 139
 140     s = *src++;
 141     len--;
 142
 143     if (!(s & 0x80))
 144     {
 145         result = s;
 146         extra = 0;
 147     }
 148     else if (!(s & 0x40))
 149     {
 150         return -1;
 151     }
 152     else if (!(s & 0x20))
 153     {
 154         result = s & 0x1f;
 155         extra = 1;
 156     }
 157     else if (!(s & 0x10))
 158     {
 159         result = s & 0xf;
 160         extra = 2;
 161     }
 162     else if (!(s & 0x08))
 163     {
 164         result = s & 0x07;
 165         extra = 3;
 166     }
 167     else if (!(s & 0x04))
 168     {
 169         result = s & 0x03;
 170         extra = 4;
 171     }
 172     else if ( ! (s & 0x02))
 173     {
 174         result = s & 0x01;
 175         extra = 5;
 176     }
 177     else
 178     {
 179         return -1;
 180     }
 181     if (extra > len)
 182         return -1;
 183
 184     while (extra--)
 185     {
 186         result <<= 6;
 187         s = *src++;
 188
 189         if ((s & 0xc0) != 0x80)
 190             return -1;
 191
 192         result |= s & 0x3f;
 193     }
 194     *dst = result;
 195     return src - src_orig;
 196 }
 197
 198 FcBool
 199 FcUtf8Len (FcChar8      *string,
 200             int         len,
 201             int         *nchar,
 202             int         *wchar)
 203 {
 204     int         n;
 205     int         clen;
 206     FcChar32    c;
 207     FcChar32    max;
 208
 209     n = 0;
 210     max = 0;
 211     while (len)
 212     {
 213         clen = FcUtf8ToUcs4 (string, &c, len);
 214         if (clen <= 0)  /* malformed UTF8 string */
 215             return FcFalse;
 216         if (c > max)
 217             max = c;
 218         string += clen;
 219         len -= clen;
 220         n++;
 221     }
 222     *nchar = n;
 223     if (max >= 0x10000)
 224         *wchar = 4;
 225     else if (max > 0x100)
 226         *wchar = 2;
 227     else
 228         *wchar = 1;
 229     return FcTrue;
 230 }
 231
 232 int
 233 FcUcs4ToUtf8 (FcChar32  ucs4,
 234               FcChar8   dest[FC_UTF8_MAX_LEN])
 235 {
 236     int bits;
 237     FcChar8 *d = dest;
 238
 239     if      (ucs4 <       0x80) {  *d++=  ucs4;                         bits= -6; }
 240     else if (ucs4 <      0x800) {  *d++= ((ucs4 >>  6) & 0x1F) | 0xC0;  bits=  0; }
 241     else if (ucs4 <    0x10000) {  *d++= ((ucs4 >> 12) & 0x0F) | 0xE0;  bits=  6; }
 242     else if (ucs4 <   0x200000) {  *d++= ((ucs4 >> 18) & 0x07) | 0xF0;  bits= 12; }
 243     else if (ucs4 <  0x4000000) {  *d++= ((ucs4 >> 24) & 0x03) | 0xF8;  bits= 18; }
 244     else if (ucs4 < 0x80000000) {  *d++= ((ucs4 >> 30) & 0x01) | 0xFC;  bits= 24; }
 245     else return 0;
 246
 247     for ( ; bits >= 0; bits-= 6) {
 248         *d++= ((ucs4 >> bits) & 0x3F) | 0x80;
 249     }
 250     return d - dest;
 251 }
 252
 253 #define GetUtf16(src,endian) \
 254     ((FcChar16) ((src)[endian == FcEndianBig ? 0 : 1] << 8) | \
 255      (FcChar16) ((src)[endian == FcEndianBig ? 1 : 0]))
 256
 257 int
 258 FcUtf16ToUcs4 (FcChar8  *src_orig,
 259                FcEndian endian,
 260                FcChar32 *dst,
 261                int      len)    /* in bytes */
 262 {
 263     FcChar8     *src = src_orig;
 264     FcChar16    a, b;
 265     FcChar32    result;
 266
 267     if (len < 2)
 268         return 0;
 269
 270     a = GetUtf16 (src, endian); src += 2; len -= 2;
 271
 272     /*
 273      * Check for surrogate
 274      */
 275     if ((a & 0xfc00) == 0xd800)
 276     {
 277         if (len < 2)
 278             return 0;
 279         b = GetUtf16 (src, endian); src += 2; len -= 2;
 280         /*
 281          * Check for invalid surrogate sequence
 282          */
 283         if ((b & 0xfc00) != 0xdc00)
 284             return 0;
 285         result = ((((FcChar32) a & 0x3ff) << 10) |
 286                   ((FcChar32) b & 0x3ff)) | 0x10000;
 287     }
 288     else
 289         result = a;
 290     *dst = result;
 291     return src - src_orig;
 292 }
 293
 294 FcBool
 295 FcUtf16Len (FcChar8     *string,
 296             FcEndian    endian,
 297             int         len,    /* in bytes */
 298             int         *nchar,
 299             int         *wchar)
 300 {
 301     int         n;
 302     int         clen;
 303     FcChar32    c;
 304     FcChar32    max;
 305
 306     n = 0;
 307     max = 0;
 308     while (len)
 309     {
 310         clen = FcUtf16ToUcs4 (string, endian, &c, len);
 311         if (clen <= 0)  /* malformed UTF8 string */
 312             return FcFalse;
 313         if (c > max)
 314             max = c;
 315         string += clen;
 316         len -= clen;
 317         n++;
 318     }
 319     *nchar = n;
 320     if (max >= 0x10000)
 321         *wchar = 4;
 322     else if (max > 0x100)
 323         *wchar = 2;
 324     else
 325         *wchar = 1;
 326     return FcTrue;
 327 }
 328
 329 void
 330 FcStrBufInit (FcStrBuf *buf, FcChar8 *init, int size)
 331 {
 332     buf->buf = init;
 333     buf->allocated = FcFalse;
 334     buf->failed = FcFalse;
 335     buf->len = 0;
 336     buf->size = size;
 337 }
 338
 339 void
 340 FcStrBufDestroy (FcStrBuf *buf)
 341 {
 342     if (buf->allocated)
 343     {
 344         free (buf->buf);
 345         FcStrBufInit (buf, 0, 0);
 346     }
 347 }
 348
 349 FcChar8 *
 350 FcStrBufDone (FcStrBuf *buf)
 351 {
 352     FcChar8 *ret;
 353
 354     ret = malloc (buf->len + 1);
 355     if (ret)
 356     {
 357         memcpy (ret, buf->buf, buf->len);
 358         ret[buf->len] = '\0';
 359     }
 360     FcStrBufDestroy (buf);
 361     return ret;
 362 }
 363
 364 FcBool
 365 FcStrBufChar (FcStrBuf *buf, FcChar8 c)
 366 {
 367     if (buf->len == buf->size)
 368     {
 369         FcChar8     *new;
 370         int         size;
 371
 372         if (buf->allocated)
 373         {
 374             size = buf->size * 2;
 375             new = realloc (buf->buf, size);
 376         }
 377         else
 378         {
 379             size = buf->size + 1024;
 380             new = malloc (size);
 381             if (new)
 382             {
 383                 buf->allocated = FcTrue;
 384                 memcpy (new, buf->buf, buf->len);
 385             }
 386         }
 387         if (!new)
 388         {
 389             buf->failed = FcTrue;
 390             return FcFalse;
 391         }
 392         buf->size = size;
 393         buf->buf = new;
 394     }
 395     buf->buf[buf->len++] = c;
 396     return FcTrue;
 397 }
 398
 399 FcBool
 400 FcStrBufString (FcStrBuf *buf, const FcChar8 *s)
 401 {
 402     FcChar8 c;
 403     while ((c = *s++))
 404         if (!FcStrBufChar (buf, c))
 405             return FcFalse;
 406     return FcTrue;
 407 }
 408
 409 FcBool
 410 FcStrBufData (FcStrBuf *buf, const FcChar8 *s, int len)
 411 {
 412     while (len-- > 0)
 413         if (!FcStrBufChar (buf, *s++))
 414             return FcFalse;
 415     return FcTrue;
 416 }
 417
 418 FcChar8 *
 419 FcStrCopyFilename (const FcChar8 *s)
 420 {
 421     FcChar8 *new;
 422
 423     if (*s == '~')
 424     {
 425         FcChar8 *home = (FcChar8 *) getenv ("HOME");
 426         int     size = strlen ((char *) home) + strlen ((char *) s);
 427         if (!home)
 428             return 0;
 429         new = (FcChar8 *) malloc (size);
 430         if (!new)
 431             return 0;
 432         FcMemAlloc (FC_MEM_STRING, size);
 433         strcpy ((char *) new, (char *) home);
 434         strcat ((char *) new, (char *) s + 1);
 435     }
 436     else
 437     {
 438         int     size = strlen ((char *) s) + 1;
 439         new = (FcChar8 *) malloc (size);
 440         if (!new)
 441             return 0;
 442         FcMemAlloc (FC_MEM_STRING, size);
 443         strcpy ((char *) new, (const char *) s);
 444     }
 445     return new;
 446 }
 447
 448 FcChar8 *
 449 FcStrDirname (const FcChar8 *file)
 450 {
 451     FcChar8 *slash;
 452     FcChar8 *dir;
 453
 454     slash = (FcChar8 *) strrchr ((char *) file, '/');
 455     if (!slash)
 456         return FcStrCopy ((FcChar8 *) ".");
 457     dir = malloc ((slash - file) + 1);
 458     if (!dir)
 459         return 0;
 460     FcMemAlloc (FC_MEM_STRING, (slash - file) + 1);
 461     strncpy ((char *) dir, (const char *) file, slash - file);
 462     dir[slash - file] = '\0';
 463     return dir;
 464 }
 465
 466 FcChar8 *
 467 FcStrBasename (const FcChar8 *file)
 468 {
 469     FcChar8 *slash;
 470
 471     slash = (FcChar8 *) strrchr ((char *) file, '/');
 472     if (!slash)
 473         return FcStrCopy (file);
 474     return FcStrCopy (slash + 1);
 475 }
 476
 477 FcStrSet *
 478 FcStrSetCreate (void)
 479 {
 480     FcStrSet    *set = malloc (sizeof (FcStrSet));
 481     if (!set)
 482         return 0;
 483     FcMemAlloc (FC_MEM_STRSET, sizeof (FcStrSet));
 484     set->ref = 1;
 485     set->num = 0;
 486     set->size = 0;
 487     set->strs = 0;
 488     return set;
 489 }
 490
 491 static FcBool
 492 _FcStrSetAppend (FcStrSet *set, FcChar8 *s)
 493 {
 494     if (FcStrSetMember (set, s))
 495     {
 496         FcStrFree (s);
 497         return FcTrue;
 498     }
 499     if (set->num == set->size)
 500     {
 501         FcChar8 **strs = malloc ((set->size + 2) * sizeof (FcChar8 *));
 502
 503         if (!strs)
 504             return FcFalse;
 505         FcMemAlloc (FC_MEM_STRSET, (set->size + 2) * sizeof (FcChar8 *));
 506         set->size = set->size + 1;
 507         if (set->num)
 508             memcpy (strs, set->strs, set->num * sizeof (FcChar8 *));
 509         if (set->strs)
 510             free (set->strs);
 511         set->strs = strs;
 512     }
 513     set->strs[set->num++] = s;
 514     set->strs[set->num] = 0;
 515     return FcTrue;
 516 }
 517
 518 FcBool
 519 FcStrSetMember (FcStrSet *set, const FcChar8 *s)
 520 {
 521     int i;
 522
 523     for (i = 0; i < set->num; i++)
 524         if (!FcStrCmp (set->strs[i], s))
 525             return FcTrue;
 526     return FcFalse;
 527 }
 528
 529 FcBool
 530 FcStrSetAdd (FcStrSet *set, const FcChar8 *s)
 531 {
 532     FcChar8 *new = FcStrCopy (s);
 533     if (!new)
 534         return FcFalse;
 535     if (!_FcStrSetAppend (set, new))
 536     {
 537         FcStrFree (new);
 538         return FcFalse;
 539     }
 540     return FcTrue;
 541 }
 542
 543 FcBool
 544 FcStrSetAddFilename (FcStrSet *set, const FcChar8 *s)
 545 {
 546     FcChar8 *new = FcStrCopyFilename (s);
 547     if (!new)
 548         return FcFalse;
 549     if (!_FcStrSetAppend (set, new))
 550     {
 551         FcStrFree (new);
 552         return FcFalse;
 553     }
 554     return FcTrue;
 555 }
 556
 557 FcBool
 558 FcStrSetDel (FcStrSet *set, const FcChar8 *s)
 559 {
 560     int i;
 561
 562     for (i = 0; i < set->num; i++)
 563         if (!FcStrCmp (set->strs[i], s))
 564         {
 565             FcStrFree (set->strs[i]);
 566             /*
 567              * copy remaining string pointers and trailing
 568              * NULL
 569              */
 570             memmove (&set->strs[i], &set->strs[i+1],
 571                      (set->num - i) * sizeof (FcChar8 *));
 572             set->num--;
 573             return FcTrue;
 574         }
 575     return FcFalse;
 576 }
 577
 578 void
 579 FcStrSetDestroy (FcStrSet *set)
 580 {
 581     if (--set->ref == 0)
 582     {
 583         int     i;
 584
 585         for (i = 0; i < set->num; i++)
 586             FcStrFree (set->strs[i]);
 587         FcMemFree (FC_MEM_STRSET, (set->size) * sizeof (FcChar8 *));
 588         if (set->strs)
 589             free (set->strs);
 590         FcMemFree (FC_MEM_STRSET, sizeof (FcStrSet));
 591         free (set);
 592     }
 593 }
 594
 595 FcStrList *
 596 FcStrListCreate (FcStrSet *set)
 597 {
 598     FcStrList   *list;
 599
 600     list = malloc (sizeof (FcStrList));
 601     if (!list)
 602         return 0;
 603     FcMemAlloc (FC_MEM_STRLIST, sizeof (FcStrList));
 604     list->set = set;
 605     set->ref++;
 606     list->n = 0;
 607     return list;
 608 }
 609
 610 FcChar8 *
 611 FcStrListNext (FcStrList *list)
 612 {
 613     if (list->n >= list->set->num)
 614         return 0;
 615     return list->set->strs[list->n++];
 616 }
 617
 618 void
 619 FcStrListDone (FcStrList *list)
 620 {
 621     FcStrSetDestroy (list->set);
 622     FcMemFree (FC_MEM_STRLIST, sizeof (FcStrList));
 623     free (list);
 624 }