fcstr.c 27.4 KB
Newer Older
Keith Packard's avatar
Keith Packard committed
1
/*
2
 * fontconfig/src/fcstr.c
Keith Packard's avatar
Keith Packard committed
3
 *
4
 * Copyright © 2000 Keith Packard
Keith Packard's avatar
Keith Packard committed
5 6 7 8 9
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
10
 * documentation, and that the name of the author(s) not be used in
Keith Packard's avatar
Keith Packard committed
11
 * advertising or publicity pertaining to distribution of the software without
12
 * specific, written prior permission.  The authors make no
Keith Packard's avatar
Keith Packard committed
13 14 15
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
16
 * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
Keith Packard's avatar
Keith Packard committed
17
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
18
 * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
Keith Packard's avatar
Keith Packard committed
19 20 21 22 23 24
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

25
#include "fcint.h"
Keith Packard's avatar
Keith Packard committed
26 27 28 29
#include <stdlib.h>
#include <ctype.h>
#include <string.h>

30

31 32
/* Objects MT-safe for readonly access. */

33 34
FcChar8 *
FcStrCopy (const FcChar8 *s)
Keith Packard's avatar
Keith Packard committed
35
{
Behdad Esfahbod's avatar
Behdad Esfahbod committed
36
    return FcStrdup (s);
Keith Packard's avatar
Keith Packard committed
37 38
}

39
static FcChar8 *
40
FcStrMakeTriple (const FcChar8 *s1, const FcChar8 *s2, const FcChar8 *s3)
41 42 43
{
    int	    s1l = s1 ? strlen ((char *) s1) : 0;
    int	    s2l = s2 ? strlen ((char *) s2) : 0;
44 45
    int     s3l = s3 ? strlen ((char *) s3) : 0;
    int	    l = s1l + 1 + s2l + 1 + s3l + 1;
46 47 48 49 50 51 52 53 54 55 56 57
    FcChar8 *s = malloc (l);

    if (!s)
	return 0;
    if (s1)
	memcpy (s, s1, s1l + 1);
    else
	s[0] = '\0';
    if (s2)
	memcpy (s + s1l + 1, s2, s2l + 1);
    else
	s[s1l + 1] = '\0';
58 59 60 61
    if (s3)
	memcpy (s + s1l + 1 + s2l + 1, s3, s3l + 1);
    else
	s[s1l + 1 + s2l + 1] = '\0';
62 63 64
    return s;
}

65 66
FcChar8 *
FcStrPlus (const FcChar8 *s1, const FcChar8 *s2)
Keith Packard's avatar
Keith Packard committed
67
{
68 69 70
    int	    s1l = strlen ((char *) s1);
    int	    s2l = strlen ((char *) s2);
    int	    l = s1l + s2l + 1;
71
    FcChar8 *s = malloc (l);
Keith Packard's avatar
Keith Packard committed
72 73 74

    if (!s)
	return 0;
75 76
    memcpy (s, s1, s1l);
    memcpy (s + s1l, s2, s2l + 1);
Keith Packard's avatar
Keith Packard committed
77 78 79 80
    return s;
}

void
81
FcStrFree (FcChar8 *s)
Keith Packard's avatar
Keith Packard committed
82 83 84 85
{
    free (s);
}

86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109

#include "../fc-case/fccase.h"

#define FcCaseFoldUpperCount(cf) \
    ((cf)->method == FC_CASE_FOLD_FULL ? 1 : (cf)->count)

typedef struct _FcCaseWalker {
    const FcChar8   *read;
    const FcChar8   *src;
    FcChar8	    utf8[FC_MAX_CASE_FOLD_CHARS + 1];
} FcCaseWalker;

static void
FcStrCaseWalkerInit (const FcChar8 *src, FcCaseWalker *w)
{
    w->src = src;
    w->read = 0;
}

static FcChar8
FcStrCaseWalkerLong (FcCaseWalker *w, FcChar8 r)
{
    FcChar32	ucs4;
    int		slen;
110
    int		len = strlen((char*)w->src);
111

112
    slen = FcUtf8ToUcs4 (w->src - 1, &ucs4, len + 1);
113 114 115 116 117 118 119 120 121 122 123 124
    if (slen <= 0)
	return r;
    if (FC_MIN_FOLD_CHAR <= ucs4 && ucs4 <= FC_MAX_FOLD_CHAR)
    {
	int min = 0;
	int max = FC_NUM_CASE_FOLD;

	while (min <= max)
	{
	    int		mid = (min + max) >> 1;
	    FcChar32    low = fcCaseFold[mid].upper;
	    FcChar32    high = low + FcCaseFoldUpperCount (&fcCaseFold[mid]);
125
	
126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162
	    if (high <= ucs4)
		min = mid + 1;
	    else if (ucs4 < low)
		max = mid - 1;
	    else
	    {
		const FcCaseFold    *fold = &fcCaseFold[mid];
		int		    dlen;
		
		switch (fold->method) {
		case  FC_CASE_FOLD_EVEN_ODD:
		    if ((ucs4 & 1) != (fold->upper & 1))
			return r;
		    /* fall through ... */
		default:
		    dlen = FcUcs4ToUtf8 (ucs4 + fold->offset, w->utf8);
		    break;
		case FC_CASE_FOLD_FULL:
		    dlen = fold->count;
		    memcpy (w->utf8, fcCaseFoldChars + fold->offset, dlen);
		    break;
		}
		
		/* consume rest of src utf-8 bytes */
		w->src += slen - 1;
		
		/* read from temp buffer */
		w->utf8[dlen] = '\0';
		w->read = w->utf8;
		return *w->read++;
	    }
	}
    }
    return r;
}

static FcChar8
163
FcStrCaseWalkerNext (FcCaseWalker *w, const char *delims)
164 165 166 167 168 169 170 171 172 173 174 175
{
    FcChar8	r;

    if (w->read)
    {
	if ((r = *w->read++))
	    return r;
	w->read = 0;
    }
    do
    {
	r = *w->src++;
176
    } while (r != 0 && delims && strchr (delims, r));
177

178 179 180 181 182 183 184
    if ((r & 0xc0) == 0xc0)
	return FcStrCaseWalkerLong (w, r);
    if ('A' <= r && r <= 'Z')
        r = r - 'A' + 'a';
    return r;
}

185 186 187 188 189 190 191 192
FcChar8 *
FcStrDowncase (const FcChar8 *s)
{
    FcCaseWalker    w;
    int		    len = 0;
    FcChar8	    *dst, *d;

    FcStrCaseWalkerInit (s, &w);
193
    while (FcStrCaseWalkerNext (&w, NULL))
194 195 196 197 198
	len++;
    d = dst = malloc (len + 1);
    if (!d)
	return 0;
    FcStrCaseWalkerInit (s, &w);
199
    while ((*d++ = FcStrCaseWalkerNext (&w, NULL)));
200 201 202
    return dst;
}

Keith Packard's avatar
Keith Packard committed
203
int
204
FcStrCmpIgnoreCase (const FcChar8 *s1, const FcChar8 *s2)
Keith Packard's avatar
Keith Packard committed
205
{
206 207 208 209
    FcCaseWalker    w1, w2;
    FcChar8	    c1, c2;

    if (s1 == s2) return 0;
210

211 212
    FcStrCaseWalkerInit (s1, &w1);
    FcStrCaseWalkerInit (s2, &w2);
213 214

    for (;;)
Keith Packard's avatar
Keith Packard committed
215
    {
216 217
	c1 = FcStrCaseWalkerNext (&w1, NULL);
	c2 = FcStrCaseWalkerNext (&w2, NULL);
218
	if (!c1 || (c1 != c2))
Keith Packard's avatar
Keith Packard committed
219
	    break;
220 221 222 223 224 225
    }
    return (int) c1 - (int) c2;
}

int
FcStrCmpIgnoreBlanksAndCase (const FcChar8 *s1, const FcChar8 *s2)
226 227 228 229 230 231
{
    return FcStrCmpIgnoreCaseAndDelims (s1, s2, (const FcChar8 *)" ");
}

int
FcStrCmpIgnoreCaseAndDelims (const FcChar8 *s1, const FcChar8 *s2, const FcChar8 *delims)
232
{
233 234 235 236
    FcCaseWalker    w1, w2;
    FcChar8	    c1, c2;

    if (s1 == s2) return 0;
237

238 239
    FcStrCaseWalkerInit (s1, &w1);
    FcStrCaseWalkerInit (s2, &w2);
240 241

    for (;;)
242
    {
243 244
	c1 = FcStrCaseWalkerNext (&w1, (const char *)delims);
	c2 = FcStrCaseWalkerNext (&w2, (const char *)delims);
245
	if (!c1 || (c1 != c2))
Keith Packard's avatar
Keith Packard committed
246 247
	    break;
    }
248
    return (int) c1 - (int) c2;
Keith Packard's avatar
Keith Packard committed
249 250
}

251 252 253 254
int
FcStrCmp (const FcChar8 *s1, const FcChar8 *s2)
{
    FcChar8 c1, c2;
255

256 257
    if (s1 == s2)
	return 0;
258
    for (;;)
259 260 261
    {
	c1 = *s1++;
	c2 = *s2++;
262
	if (!c1 || c1 != c2)
263 264
	    break;
    }
265
    return (int) c1 - (int) c2;
266 267
}

268 269 270 271 272 273 274 275 276 277 278 279
/*
 * Return a hash value for a string
 */

FcChar32
FcStrHashIgnoreCase (const FcChar8 *s)
{
    FcChar32	    h = 0;
    FcCaseWalker    w;
    FcChar8	    c;

    FcStrCaseWalkerInit (s, &w);
280
    while ((c = FcStrCaseWalkerNext (&w, NULL)))
281 282 283 284
	h = ((h << 3) ^ (h >> 3)) ^ c;
    return h;
}

285 286 287 288 289 290 291
/*
 * Is the head of s1 equal to s2?
 */

static FcBool
FcStrIsAtIgnoreBlanksAndCase (const FcChar8 *s1, const FcChar8 *s2)
{
292 293 294 295 296
    FcCaseWalker    w1, w2;
    FcChar8	    c1, c2;

    FcStrCaseWalkerInit (s1, &w1);
    FcStrCaseWalkerInit (s2, &w2);
297 298

    for (;;)
299
    {
300 301
	c1 = FcStrCaseWalkerNext (&w1, " ");
	c2 = FcStrCaseWalkerNext (&w2, " ");
302
	if (!c1 || (c1 != c2))
303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323
	    break;
    }
    return c1 == c2 || !c2;
}

/*
 * Does s1 contain an instance of s2 (ignoring blanks and case)?
 */

const FcChar8 *
FcStrContainsIgnoreBlanksAndCase (const FcChar8 *s1, const FcChar8 *s2)
{
    while (*s1)
    {
	if (FcStrIsAtIgnoreBlanksAndCase (s1, s2))
	    return s1;
	s1++;
    }
    return 0;
}

324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343
static FcBool
FcCharIsPunct (const FcChar8 c)
{
    if (c < '0')
	return FcTrue;
    if (c <= '9')
	return FcFalse;
    if (c < 'A')
	return FcTrue;
    if (c <= 'Z')
	return FcFalse;
    if (c < 'a')
	return FcTrue;
    if (c <= 'z')
	return FcFalse;
    if (c <= '~')
	return FcTrue;
    return FcFalse;
}

344 345 346 347 348 349 350
/*
 * Is the head of s1 equal to s2?
 */

static FcBool
FcStrIsAtIgnoreCase (const FcChar8 *s1, const FcChar8 *s2)
{
351 352 353 354 355
    FcCaseWalker    w1, w2;
    FcChar8	    c1, c2;

    FcStrCaseWalkerInit (s1, &w1);
    FcStrCaseWalkerInit (s2, &w2);
356 357

    for (;;)
358
    {
359 360
	c1 = FcStrCaseWalkerNext (&w1, NULL);
	c2 = FcStrCaseWalkerNext (&w2, NULL);
361
	if (!c1 || (c1 != c2))
362 363 364 365 366 367
	    break;
    }
    return c1 == c2 || !c2;
}

/*
368
 * Does s1 contain an instance of s2 (ignoring blanks and case)?
369 370 371 372 373 374 375 376 377 378 379 380 381 382
 */

const FcChar8 *
FcStrContainsIgnoreCase (const FcChar8 *s1, const FcChar8 *s2)
{
    while (*s1)
    {
	if (FcStrIsAtIgnoreCase (s1, s2))
	    return s1;
	s1++;
    }
    return 0;
}

383 384 385 386 387 388 389 390 391 392 393 394 395
/*
 * Does s1 contain an instance of s2 on a word boundary (ignoring case)?
 */

const FcChar8 *
FcStrContainsWord (const FcChar8 *s1, const FcChar8 *s2)
{
    FcBool  wordStart = FcTrue;
    int	    s1len = strlen ((char *) s1);
    int	    s2len = strlen ((char *) s2);
	
    while (s1len >= s2len)
    {
396
	if (wordStart &&
397 398 399 400 401 402 403 404 405 406 407 408 409 410
	    FcStrIsAtIgnoreCase (s1, s2) &&
	    (s1len == s2len || FcCharIsPunct (s1[s2len])))
	{
	    return s1;
	}
	wordStart = FcFalse;
	if (FcCharIsPunct (*s1))
	    wordStart = FcTrue;
	s1++;
	s1len--;
    }
    return 0;
}

411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435
/*
 * returns the number of strings (ignoring delimitors and case) being matched
 */

int
FcStrMatchIgnoreCaseAndDelims (const FcChar8 *s1, const FcChar8 *s2, const FcChar8 *delims)
{
    FcCaseWalker    w1, w2;
    FcChar8	    c1, c2;

    if (s1 == s2) return 0;

    FcStrCaseWalkerInit (s1, &w1);
    FcStrCaseWalkerInit (s2, &w2);

    for (;;)
    {
	c1 = FcStrCaseWalkerNext (&w1, (const char *)delims);
	c2 = FcStrCaseWalkerNext (&w2, (const char *)delims);
	if (!c1 || (c1 != c2))
	    break;
    }
    return w1.src - s1 - 1;
}

436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479
FcBool
FcStrGlobMatch (const FcChar8 *glob,
		const FcChar8 *string)
{
    FcChar8	c;

    while ((c = *glob++))
    {
	switch (c) {
	case '*':
	    /* short circuit common case */
	    if (!*glob)
		return FcTrue;
	    /* short circuit another common case */
	    if (strchr ((char *) glob, '*') == 0)
	    {
		size_t l1, l2;

		l1 = strlen ((char *) string);
		l2 = strlen ((char *) glob);
		if (l1 < l2)
		    return FcFalse;
		string += (l1 - l2);
	    }
	    while (*string)
	    {
		if (FcStrGlobMatch (glob, string))
		    return FcTrue;
		string++;
	    }
	    return FcFalse;
	case '?':
	    if (*string++ == '\0')
		return FcFalse;
	    break;
	default:
	    if (*string++ != c)
		return FcFalse;
	    break;
	}
    }
    return *string == '\0';
}

480 481 482
const FcChar8 *
FcStrStrIgnoreCase (const FcChar8 *s1, const FcChar8 *s2)
{
483 484 485
    FcCaseWalker    w1, w2;
    FcChar8	    c1, c2;
    const FcChar8   *cur;
486 487 488 489 490 491

    if (!s1 || !s2)
	return 0;

    if (s1 == s2)
	return s1;
492

493 494
    FcStrCaseWalkerInit (s1, &w1);
    FcStrCaseWalkerInit (s2, &w2);
495

496
    c2 = FcStrCaseWalkerNext (&w2, NULL);
497

498
    for (;;)
499
    {
500
	cur = w1.src;
501
	c1 = FcStrCaseWalkerNext (&w1, NULL);
502
	if (!c1)
503
	    break;
504 505 506 507 508
	if (c1 == c2)
	{
	    FcCaseWalker    w1t = w1;
	    FcCaseWalker    w2t = w2;
	    FcChar8	    c1t, c2t;
509

510 511
	    for (;;)
	    {
512 513
		c1t = FcStrCaseWalkerNext (&w1t, NULL);
		c2t = FcStrCaseWalkerNext (&w2t, NULL);
514

515 516 517 518 519
		if (!c2t)
		    return cur;
		if (c2t != c1t)
		    break;
	    }
520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543
	}
    }
    return 0;
}

const FcChar8 *
FcStrStr (const FcChar8 *s1, const FcChar8 *s2)
{
    FcChar8 c1, c2;
    const FcChar8 * p = s1;
    const FcChar8 * b = s2;

    if (!s1 || !s2)
	return 0;

    if (s1 == s2)
	return s1;

again:
    c2 = *s2++;

    if (!c2)
	return 0;

544
    for (;;)
545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571
    {
	p = s1;
	c1 = *s1++;
	if (!c1 || c1 == c2)
	    break;
    }

    if (c1 != c2)
	return 0;

    for (;;)
    {
	c1 = *s1;
	c2 = *s2;
	if (c1 && c2 && c1 != c2)
	{
	    s1 = p + 1;
	    s2 = b;
	    goto again;
	}
	if (!c2)
	    return p;
	if (!c1)
	    return 0;
	++ s1;
	++ s2;
    }
572
    /* never reached. */
573 574
}

Keith Packard's avatar
Keith Packard committed
575
int
576 577 578
FcUtf8ToUcs4 (const FcChar8 *src_orig,
	      FcChar32	    *dst,
	      int	    len)
Keith Packard's avatar
Keith Packard committed
579
{
580 581 582 583
    const FcChar8   *src = src_orig;
    FcChar8	    s;
    int		    extra;
    FcChar32	    result;
Keith Packard's avatar
Keith Packard committed
584 585 586

    if (len == 0)
	return 0;
587

Keith Packard's avatar
Keith Packard committed
588 589
    s = *src++;
    len--;
590

Keith Packard's avatar
Keith Packard committed
591 592 593 594
    if (!(s & 0x80))
    {
	result = s;
	extra = 0;
595
    }
Keith Packard's avatar
Keith Packard committed
596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630
    else if (!(s & 0x40))
    {
	return -1;
    }
    else if (!(s & 0x20))
    {
	result = s & 0x1f;
	extra = 1;
    }
    else if (!(s & 0x10))
    {
	result = s & 0xf;
	extra = 2;
    }
    else if (!(s & 0x08))
    {
	result = s & 0x07;
	extra = 3;
    }
    else if (!(s & 0x04))
    {
	result = s & 0x03;
	extra = 4;
    }
    else if ( ! (s & 0x02))
    {
	result = s & 0x01;
	extra = 5;
    }
    else
    {
	return -1;
    }
    if (extra > len)
	return -1;
631

Keith Packard's avatar
Keith Packard committed
632 633 634 635 636 637 638 639 640 641 642 643 644 645 646
    while (extra--)
    {
	result <<= 6;
	s = *src++;
	
	if ((s & 0xc0) != 0x80)
	    return -1;
	
	result |= s & 0x3f;
    }
    *dst = result;
    return src - src_orig;
}

FcBool
647 648 649 650
FcUtf8Len (const FcChar8    *string,
	   int		    len,
	   int		    *nchar,
	   int		    *wchar)
Keith Packard's avatar
Keith Packard committed
651 652 653 654 655
{
    int		n;
    int		clen;
    FcChar32	c;
    FcChar32	max;
656

Keith Packard's avatar
Keith Packard committed
657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678
    n = 0;
    max = 0;
    while (len)
    {
	clen = FcUtf8ToUcs4 (string, &c, len);
	if (clen <= 0)	/* malformed UTF8 string */
	    return FcFalse;
	if (c > max)
	    max = c;
	string += clen;
	len -= clen;
	n++;
    }
    *nchar = n;
    if (max >= 0x10000)
	*wchar = 4;
    else if (max > 0x100)
	*wchar = 2;
    else
	*wchar = 1;
    return FcTrue;
}
679

680 681 682 683 684 685
int
FcUcs4ToUtf8 (FcChar32	ucs4,
	      FcChar8	dest[FC_UTF8_MAX_LEN])
{
    int	bits;
    FcChar8 *d = dest;
686

687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705
    if      (ucs4 <       0x80) {  *d++=  ucs4;                         bits= -6; }
    else if (ucs4 <      0x800) {  *d++= ((ucs4 >>  6) & 0x1F) | 0xC0;  bits=  0; }
    else if (ucs4 <    0x10000) {  *d++= ((ucs4 >> 12) & 0x0F) | 0xE0;  bits=  6; }
    else if (ucs4 <   0x200000) {  *d++= ((ucs4 >> 18) & 0x07) | 0xF0;  bits= 12; }
    else if (ucs4 <  0x4000000) {  *d++= ((ucs4 >> 24) & 0x03) | 0xF8;  bits= 18; }
    else if (ucs4 < 0x80000000) {  *d++= ((ucs4 >> 30) & 0x01) | 0xFC;  bits= 24; }
    else return 0;

    for ( ; bits >= 0; bits-= 6) {
	*d++= ((ucs4 >> bits) & 0x3F) | 0x80;
    }
    return d - dest;
}

#define GetUtf16(src,endian) \
    ((FcChar16) ((src)[endian == FcEndianBig ? 0 : 1] << 8) | \
     (FcChar16) ((src)[endian == FcEndianBig ? 1 : 0]))

int
706 707 708 709
FcUtf16ToUcs4 (const FcChar8	*src_orig,
	       FcEndian		endian,
	       FcChar32		*dst,
	       int		len)	/* in bytes */
710
{
711 712 713
    const FcChar8   *src = src_orig;
    FcChar16	    a, b;
    FcChar32	    result;
714 715 716

    if (len < 2)
	return 0;
717

718
    a = GetUtf16 (src, endian); src += 2; len -= 2;
719 720 721

    /*
     * Check for surrogate
722 723 724 725 726 727 728 729 730 731 732 733
     */
    if ((a & 0xfc00) == 0xd800)
    {
	if (len < 2)
	    return 0;
	b = GetUtf16 (src, endian); src += 2; len -= 2;
	/*
	 * Check for invalid surrogate sequence
	 */
	if ((b & 0xfc00) != 0xdc00)
	    return 0;
	result = ((((FcChar32) a & 0x3ff) << 10) |
734
		  ((FcChar32) b & 0x3ff)) + 0x10000;
735 736 737 738 739 740 741 742
    }
    else
	result = a;
    *dst = result;
    return src - src_orig;
}

FcBool
743 744 745 746 747
FcUtf16Len (const FcChar8   *string,
	    FcEndian	    endian,
	    int		    len,	/* in bytes */
	    int		    *nchar,
	    int		    *wchar)
748 749 750 751 752
{
    int		n;
    int		clen;
    FcChar32	c;
    FcChar32	max;
753

754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776
    n = 0;
    max = 0;
    while (len)
    {
	clen = FcUtf16ToUcs4 (string, endian, &c, len);
	if (clen <= 0)	/* malformed UTF8 string */
	    return FcFalse;
	if (c > max)
	    max = c;
	string += clen;
	len -= clen;
	n++;
    }
    *nchar = n;
    if (max >= 0x10000)
	*wchar = 4;
    else if (max > 0x100)
	*wchar = 2;
    else
	*wchar = 1;
    return FcTrue;
}

777 778 779
void
FcStrBufInit (FcStrBuf *buf, FcChar8 *init, int size)
{
780 781 782 783 784 785
    if (init)
    {
	buf->buf = init;
	buf->size = size;
    } else
    {
786 787
	buf->buf = buf->buf_static;
	buf->size = sizeof (buf->buf_static);
788
    }
789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808
    buf->allocated = FcFalse;
    buf->failed = FcFalse;
    buf->len = 0;
}

void
FcStrBufDestroy (FcStrBuf *buf)
{
    if (buf->allocated)
    {
	free (buf->buf);
	FcStrBufInit (buf, 0, 0);
    }
}

FcChar8 *
FcStrBufDone (FcStrBuf *buf)
{
    FcChar8 *ret;

809 810 811 812
    if (buf->failed)
	ret = NULL;
    else
	ret = malloc (buf->len + 1);
813 814 815 816 817 818 819 820 821
    if (ret)
    {
	memcpy (ret, buf->buf, buf->len);
	ret[buf->len] = '\0';
    }
    FcStrBufDestroy (buf);
    return ret;
}

822 823 824 825 826 827 828 829 830 831 832
FcChar8 *
FcStrBufDoneStatic (FcStrBuf *buf)
{
    FcStrBufChar (buf, '\0');

    if (buf->failed)
	return NULL;

    return buf->buf;
}

833 834 835 836 837 838 839 840
FcBool
FcStrBufChar (FcStrBuf *buf, FcChar8 c)
{
    if (buf->len == buf->size)
    {
	FcChar8	    *new;
	int	    size;

841 842 843
	if (buf->failed)
	    return FcFalse;

844 845 846 847 848 849 850
	if (buf->allocated)
	{
	    size = buf->size * 2;
	    new = realloc (buf->buf, size);
	}
	else
	{
851
	    size = buf->size + 64;
852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889
	    new = malloc (size);
	    if (new)
	    {
		buf->allocated = FcTrue;
		memcpy (new, buf->buf, buf->len);
	    }
	}
	if (!new)
	{
	    buf->failed = FcTrue;
	    return FcFalse;
	}
	buf->size = size;
	buf->buf = new;
    }
    buf->buf[buf->len++] = c;
    return FcTrue;
}

FcBool
FcStrBufString (FcStrBuf *buf, const FcChar8 *s)
{
    FcChar8 c;
    while ((c = *s++))
	if (!FcStrBufChar (buf, c))
	    return FcFalse;
    return FcTrue;
}

FcBool
FcStrBufData (FcStrBuf *buf, const FcChar8 *s, int len)
{
    while (len-- > 0)
	if (!FcStrBufChar (buf, *s++))
	    return FcFalse;
    return FcTrue;
}

890 891 892 893 894 895
FcBool
FcStrUsesHome (const FcChar8 *s)
{
    return *s == '~';
}

896 897 898 899 900
FcBool
FcStrIsAbsoluteFilename (const FcChar8 *s)
{
#ifdef _WIN32
    if (*s == '\\' ||
901
	(isalpha (*s) && s[1] == ':' && (s[2] == '/' || s[2] == '\\')))
902 903 904 905 906
	return FcTrue;
#endif
    return *s == '/';
}

907 908 909 910 911
FcChar8 *
FcStrBuildFilename (const FcChar8 *path,
		    ...)
{
    va_list ap;
912
    FcStrSet *sset;
913 914 915 916
    FcStrList *list;
    FcChar8 *s, *ret = NULL, *p;
    size_t len = 0;

917 918 919
    if (!path)
	return NULL;

Patrick Haller's avatar
Patrick Haller committed
920
    sset = FcStrSetCreateEx (FCSS_ALLOW_DUPLICATES | FCSS_GROW_BY_64);
921
    if (!sset)
922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968
	return NULL;

    if (!FcStrSetAdd (sset, path))
	goto bail0;

    va_start (ap, path);
    while (1)
    {
	s = (FcChar8 *)va_arg (ap, FcChar8 *);
	if (!s)
	    break;
	if (!FcStrSetAdd (sset, s))
	    goto bail1;
    }
    list = FcStrListCreate (sset);
    while ((s = FcStrListNext (list)))
    {
	len += strlen ((const char *)s) + 1;
    }
    list->n = 0;
    ret = malloc (sizeof (FcChar8) * (len + 1));
    if (!ret)
	goto bail2;
    p = ret;
    while ((s = FcStrListNext (list)))
    {
	if (p != ret)
	{
	    p[0] = FC_DIR_SEPARATOR;
	    p++;
	}
	len = strlen ((const char *)s);
	memcpy (p, s, len);
	p += len;
    }
    *p = 0;

bail2:
    FcStrListDone (list);
bail1:
    va_end (ap);
bail0:
    FcStrSetDestroy (sset);

    return ret;
}

969 970 971 972
FcChar8 *
FcStrCopyFilename (const FcChar8 *s)
{
    FcChar8 *new;
973

974 975
    if (*s == '~')
    {
976
	FcChar8	*home = FcConfigHome ();
977
	FcChar8	*full;
978
	int	size;
979
	if (!home)
980
	    return NULL;
981
	size = strlen ((char *) home) + strlen ((char *) s);
982
	full = (FcChar8 *) malloc (size + 1);
983
	if (!full)
984
	    return NULL;
985 986 987 988
	strcpy ((char *) full, (char *) home);
	strcat ((char *) full, (char *) s + 1);
	new = FcStrCanonFilename (full);
	free (full);
989 990
    }
    else
991
	new = FcStrCanonFilename (s);
992

993 994 995
    return new;
}

Tor Lillqvist's avatar
Tor Lillqvist committed
996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013
FcChar8 *
FcStrLastSlash (const FcChar8  *path)
{
    FcChar8	    *slash;

    slash = (FcChar8 *) strrchr ((const char *) path, '/');
#ifdef _WIN32
    {
        FcChar8     *backslash;

	backslash = (FcChar8 *) strrchr ((const char *) path, '\\');
	if (!slash || (backslash && backslash > slash))
	    slash = backslash;
    }
#endif

    return slash;
}
1014

1015 1016 1017 1018 1019 1020
FcChar8 *
FcStrDirname (const FcChar8 *file)
{
    FcChar8 *slash;
    FcChar8 *dir;

Tor Lillqvist's avatar
Tor Lillqvist committed
1021
    slash = FcStrLastSlash (file);
1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036
    if (!slash)
	return FcStrCopy ((FcChar8 *) ".");
    dir = malloc ((slash - file) + 1);
    if (!dir)
	return 0;
    strncpy ((char *) dir, (const char *) file, slash - file);
    dir[slash - file] = '\0';
    return dir;
}

FcChar8 *
FcStrBasename (const FcChar8 *file)
{
    FcChar8 *slash;

Tor Lillqvist's avatar
Tor Lillqvist committed
1037
    slash = FcStrLastSlash (file);
1038 1039 1040 1041 1042
    if (!slash)
	return FcStrCopy (file);
    return FcStrCopy (slash + 1);
}

1043
static FcChar8 *
1044
FcStrCanonAbsoluteFilename (const FcChar8 *s)
1045 1046 1047 1048
{
    FcChar8 *file;
    FcChar8 *f;
    const FcChar8 *slash;
1049
    int size;
1050

1051 1052
    size = strlen ((char *) s) + 1;
    file = malloc (size);
1053 1054 1055 1056
    if (!file)
	return NULL;
    slash = NULL;
    f = file;
1057 1058 1059 1060
#ifdef _WIN32
    if (*s == '/' && *(s+1) == '/') /* Network path, do not squash // */
	*f++ = *s++;
#endif
1061 1062 1063 1064 1065 1066
    for (;;) {
	if (*s == '/' || *s == '\0')
	{
	    if (slash)
	    {
		switch (s - slash) {
1067 1068 1069
		case 1:
		    f -= 1;	/* squash // and trim final / from file */
		    break;
1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094
		case 2:
		    if (!strncmp ((char *) slash, "/.", 2))
		    {
			f -= 2;	/* trim /. from file */
		    }
		    break;
		case 3:
		    if (!strncmp ((char *) slash, "/..", 3))
		    {
			f -= 3;	/* trim /.. from file */
			while (f > file) {
			    if (*--f == '/')
				break;
			}
		    }
		    break;
		}
	    }
	    slash = s;
	}
	if (!(*f++ = *s++))
	    break;
    }
    return file;
}
1095

1096 1097
#ifdef _WIN32
/*
1098
 * Convert '\\' to '/' , remove double '/'
1099 1100 1101 1102 1103 1104 1105 1106 1107
 */
static void
FcConvertDosPath (char *str)
{
  size_t len = strlen (str);
  char *p = str;
  char *dest = str;
  char *end = str + len;
  char last = 0;
1108 1109 1110 1111 1112 1113 1114

  if (*p == '\\')
    {
      *p = '/';
      p++;
      dest++;
    }
1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138
  while (p < end)
    {
      if (*p == '\\')
	*p = '/';

      if (*p != '/'
	  || last != '/')
	{
	  *dest++ = *p;
	}

      last = *p;
      p++;
    }

  *dest = 0;
}
#endif

FcChar8 *
FcStrCanonFilename (const FcChar8 *s)
{
#ifdef _WIN32
    FcChar8 full[FC_MAX_FILE_LEN + 2];
Akira TAGOH's avatar
Akira TAGOH committed
1139 1140
    int size = GetFullPathName ((LPCSTR) s, sizeof (full) -1,
				(LPSTR) full, NULL);
1141 1142 1143 1144

    if (size == 0)
	perror ("GetFullPathName");

Akira TAGOH's avatar
Akira TAGOH committed
1145
    FcConvertDosPath ((char *) full);
1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157
    return FcStrCanonAbsoluteFilename (full);
#else
    if (s[0] == '/')
	return FcStrCanonAbsoluteFilename (s);
    else
    {
	FcChar8	*full;
	FcChar8 *file;

	FcChar8	cwd[FC_MAX_FILE_LEN + 2];
	if (getcwd ((char *) cwd, FC_MAX_FILE_LEN) == NULL)
	    return NULL;
1158
	full = FcStrBuildFilename (cwd, s, NULL);
1159 1160 1161 1162 1163 1164 1165
	file = FcStrCanonAbsoluteFilename (full);
	FcStrFree (full);
	return file;
    }
#endif
}

1166

1167 1168
FcStrSet *
FcStrSetCreate (void)
Patrick Haller's avatar
Patrick Haller committed
1169 1170 1171 1172 1173 1174
{
    return FcStrSetCreateEx (FCSS_DEFAULT);
}

FcStrSet *
FcStrSetCreateEx (unsigned int control)
1175 1176 1177 1178
{
    FcStrSet	*set = malloc (sizeof (FcStrSet));
    if (!set)
	return 0;
1179
    FcRefInit (&set->ref, 1);
1180 1181
    set->num = 0;
    set->size = 0;
1182
    set->strs = 0;
Patrick Haller's avatar
Patrick Haller committed
1183
    set->control = control;
1184 1185 1186
    return set;
}

Patrick Haller's avatar
Patrick Haller committed
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
static FcBool
_FcStrSetGrow (FcStrSet *set, int growElements)
{
    /* accommodate an additional NULL entry at the end of the array */
    FcChar8 **strs = malloc ((set->size + growElements + 1) * sizeof (FcChar8 *));
    if (!strs)
        return FcFalse;
    if (set->num)
        memcpy (strs, set->strs, set->num * sizeof (FcChar8 *));
    if (set->strs)
        free (set->strs);
    set->size = set->size + growElements;
    set->strs = strs;
    return FcTrue;
}

1203 1204 1205
static FcBool
_FcStrSetAppend (FcStrSet *set, FcChar8 *s)
{
Patrick Haller's avatar
Patrick Haller committed
1206
    if (!FcStrSetHasControlBit (set, FCSS_ALLOW_DUPLICATES))
1207
    {
Patrick Haller's avatar
Patrick Haller committed
1208 1209 1210 1211 1212
        if (FcStrSetMember (set, s))
        {
            FcStrFree (s);
            return FcTrue;
        }
1213
    }
1214
    if (set->num == set->size)
1215
    {
Patrick Haller's avatar
Patrick Haller committed
1216 1217 1218
        int growElements = FcStrSetHasControlBit (set, FCSS_GROW_BY_64) ? 64 : 1;
        if (!_FcStrSetGrow(set, growElements))
            return FcFalse;
1219 1220 1221
    }
    set->strs[set->num++] = s;
    set->strs[set->num] = 0;
1222 1223 1224 1225 1226 1227 1228 1229 1230
    return FcTrue;
}

FcBool
FcStrSetMember (FcStrSet *set, const FcChar8 *s)
{
    int	i;

    for (i = 0; i < set->num; i++)
1231
	if (!FcStrCmp (set->strs[i], s))
1232 1233 1234 1235
	    return FcTrue;
    return FcFalse;
}

1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
static int
fc_strcmp_r (const FcChar8 *s1, const FcChar8 *s2, const FcChar8 **ret)
{
    FcChar8 c1, c2;

    if (s1 == s2)
    {
	if (ret)
	    *ret = NULL;
	return 0;
    }
    for (;;)
    {
	if (s1)
	    c1 = *s1++;
	else
	    c1 = 0;
	if (s2)
	    c2 = *s2++;
	else
	    c2 = 0;
	if (!c1 || c1 != c2)
	    break;
    }
    if (ret)
	*ret = s1;
    return (int) c1  - (int) c2;
}

FcBool
FcStrSetMemberAB (FcStrSet *set, const FcChar8 *a, FcChar8 *b, FcChar8 **ret)
{
    int i;
    const FcChar8 *s = NULL;

    for (i = 0; i < set->num; i++)
    {
	if (!fc_strcmp_r (set->strs[i], a, &s) && s)
	{
	    if (!fc_strcmp_r (s, b, NULL))
	    {
		if (ret)
		    *ret = set->strs[i];
		return FcTrue;
	    }
	}
    }
    if (ret)
	*ret = NULL;
    return FcFalse;
}

1288 1289 1290 1291 1292 1293 1294
FcBool
FcStrSetEqual (FcStrSet *sa, FcStrSet *sb)
{
    int	i;
    if (sa->num != sb->num)
	return FcFalse;
    for (i = 0; i < sa->num; i++)
1295
	if (!FcStrSetMember (sb, sa->strs[i]))
1296 1297 1298 1299
	    return FcFalse;
    return FcTrue;
}

1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313
FcBool
FcStrSetAdd (FcStrSet *set, const FcChar8 *s)
{
    FcChar8 *new = FcStrCopy (s);
    if (!new)
	return FcFalse;
    if (!_FcStrSetAppend (set, new))
    {
	FcStrFree (new);
	return FcFalse;
    }
    return FcTrue;
}

1314
FcBool
1315
FcStrSetAddTriple (FcStrSet *set, const FcChar8 *a, const FcChar8 *b, const FcChar8 *c)
1316
{
1317
    FcChar8 *new = FcStrMakeTriple (a, b, c);
1318 1319 1320 1321 1322 1323 1324 1325 1326 1327
    if (!new)
	return FcFalse;
    if (!_FcStrSetAppend (set, new))
    {
	FcStrFree (new);
	return FcFalse;
    }
    return FcTrue;
}

1328 1329
const FcChar8 *
FcStrTripleSecond (FcChar8 *str)
1330 1331 1332 1333 1334 1335 1336 1337
{
    FcChar8 *second = str + strlen((char *) str) + 1;

    if (*second == '\0')
	return 0;
    return second;
}

1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348
const FcChar8 *
FcStrTripleThird (FcChar8 *str)
{
    FcChar8 *second = str + strlen ((char *) str) + 1;
    FcChar8 *third = second + strlen ((char *) second) + 1;

    if (*third == '\0')
	return 0;
    return third;
}

1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362
FcBool
FcStrSetAddFilename (FcStrSet *set, const FcChar8 *s)
{
    FcChar8 *new = FcStrCopyFilename (s);
    if (!new)
	return FcFalse;
    if (!_FcStrSetAppend (set, new))
    {
	FcStrFree (new);
	return FcFalse;
    }
    return FcTrue;
}

1363
FcBool
1364
FcStrSetAddFilenamePairWithSalt (FcStrSet *set, const FcChar8 *a, const FcChar8 *b, const FcChar8 *salt)
1365 1366 1367
{
    FcChar8 *new_a = NULL;
    FcChar8 *new_b = NULL;
1368
    FcChar8 *rs = NULL;
1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386
    FcBool  ret;

    if (a)
    {
	new_a = FcStrCopyFilename (a);
	if (!new_a)
	    return FcFalse;
    }
    if (b)
    {
	new_b = FcStrCopyFilename(b);
	if (!new_b)
	{
	    if (new_a)
		FcStrFree(new_a);
	    return FcFalse;
	}
    }
1387 1388 1389 1390 1391
    /* Override maps with new one if exists */
    if (FcStrSetMemberAB (set, new_a, new_b, &rs))
    {
	FcStrSetDel (set, rs);
    }
1392
    ret = FcStrSetAddTriple (set, new_a, new_b, salt);
1393 1394 1395 1396 1397 1398 1399
    if (new_a)
	FcStrFree (new_a);
    if (new_b)
	FcStrFree (new_b);
    return ret;
}

1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413
FcBool
FcStrSetAddLangs (FcStrSet *strs, const char *languages)
{
    const char *p = languages, *next;
    FcChar8 lang[128] = {0}, *normalized_lang;
    size_t len;
    FcBool ret = FcFalse;

    if (!languages)
	return FcFalse;

    while ((next = strchr (p, ':')))
    {
	len = next - p;
1414
	len = FC_MIN (len, 127);
1415 1416 1417 1418 1419 1420 1421 1422 1423
	strncpy ((char *) lang, p, len);
	lang[len] = 0;
	/* ignore an empty item */
	if (*lang)
	{
	    normalized_lang = FcLangNormalize ((const FcChar8 *) lang);
	    if (normalized_lang)
	    {
		FcStrSetAdd (strs, normalized_lang);
1424
		FcStrFree (normalized_lang);
1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435
		ret = FcTrue;
	    }
	}
	p = next + 1;
    }
    if (*p)
    {
	normalized_lang = FcLangNormalize ((const FcChar8 *) p);
	if (normalized_lang)
	{
	    FcStrSetAdd (strs, normalized_lang);
1436
	    FcStrFree (normalized_lang);
1437 1438 1439 1440 1441 1442 1443
	    ret = FcTrue;
	}
    }

    return ret;
}

1444 1445 1446 1447 1448 1449
FcBool
FcStrSetDel (FcStrSet *set, const FcChar8 *s)
{
    int	i;

    for (i = 0; i < set->num; i++)
1450
	if (!FcStrCmp (set->strs[i], s))
1451
	{
1452
	    FcStrFree (set->strs[i]);
1453 1454 1455 1456
	    /*
	     * copy remaining string pointers and trailing
	     * NULL
	     */
1457
	    memmove (&set->strs[i], &set->strs[i+1],
1458 1459 1460 1461 1462 1463 1464
		     (set->num - i) * sizeof (FcChar8 *));
	    set->num--;
	    return FcTrue;
	}
    return FcFalse;
}

Akira TAGOH's avatar
Akira TAGOH committed
1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480
FcBool
FcStrSetDeleteAll (FcStrSet *set)
{
    int i;

    if (FcRefIsConst (&set->ref))
	return FcFalse;

    for (i = set->num; i > 0; i--)
    {
	FcStrFree (set->strs[i - 1]);
	set->num--;
    }
    return FcTrue;
}

Behdad Esfahbod's avatar
Behdad Esfahbod committed
1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491
/* TODO Make public */
static FcStrSet *
FcStrSetReference (FcStrSet *set)
{
    if (FcRefIsConst (&set->ref))
	return set;

    FcRefInc (&set->ref);
    return set;
}

1492 1493 1494
void
FcStrSetDestroy (FcStrSet *set)
{
1495
    int	i;
1496

1497 1498 1499 1500
    /* We rely on this in FcGetDefaultLangs for caching. */
    if (FcRefIsConst (&set->ref))
	return;

1501 1502 1503 1504 1505 1506 1507 1508
    if (FcRefDec (&set->ref) != 1)
	return;

    for (i = 0; i < set->num; i++)
	FcStrFree (set->strs[i]);
    if (set->strs)
	free (set->strs);
    free (set);
1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519
}

FcStrList *
FcStrListCreate (FcStrSet *set)
{
    FcStrList	*list;

    list = malloc (sizeof (FcStrList));
    if (!list)
	return 0;
    list->set = set;
Behdad Esfahbod's avatar
Behdad Esfahbod committed
1520
    FcStrSetReference (set);
1521 1522 1523 1524
    list->n = 0;
    return list;
}

1525 1526 1527 1528 1529 1530
void
FcStrListFirst (FcStrList *list)
{
    list->n = 0;
}

1531 1532 1533 1534 1535
FcChar8 *
FcStrListNext (FcStrList *list)
{
    if (list->n >= list->set->num)
	return 0;
1536
    return list->set->strs[list->n++];
1537 1538 1539 1540 1541 1542 1543 1544
}

void
FcStrListDone (FcStrList *list)
{
    FcStrSetDestroy (list->set);
    free (list);
}
1545

1546 1547 1548
#define __fcstr__
#include "fcaliastail.h"
#undef __fcstr__