summaryrefslogtreecommitdiff
path: root/source3/lib/util_str.c
blob: dbfaf179a173c62a50226a27ca61a93f30bf97c4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
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
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
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
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
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
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
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
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
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
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
/* 
   Unix SMB/Netbios implementation.
   Version 3.0
   Samba utility functions
   Copyright (C) Andrew Tridgell 1992-2001
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

/****************************************************************************
  Get the next token from a string, return False if none found
  handles double-quotes. 
Based on a routine by GJC@VILLAGE.COM. 
Extensively modified by Andrew.Tridgell@anu.edu.au
****************************************************************************/
BOOL next_token(char **ptr,char *buff,char *sep, size_t bufsize)
{
	char *s;
	BOOL quoted;
	size_t len=1;

	if (!ptr) return(False);

	s = *ptr;

	/* default to simple separators */
	if (!sep) sep = " \t\n\r";

	/* find the first non sep char */
	while (*s && strchr_m(sep,*s)) s++;
	
	/* nothing left? */
	if (! *s) return(False);
	
	/* copy over the token */
	for (quoted = False; len < bufsize && *s && (quoted || !strchr_m(sep,*s)); s++) {
		if (*s == '\"') {
			quoted = !quoted;
		} else {
			len++;
			*buff++ = *s;
		}
	}
	
	*ptr = (*s) ? s+1 : s;  
	*buff = 0;
	
	return(True);
}



/****************************************************************************
This is like next_token but is not re-entrant and "remembers" the first 
parameter so you can pass NULL. This is useful for user interface code
but beware the fact that it is not re-entrant!
****************************************************************************/
static char *last_ptr=NULL;

BOOL next_token_nr(char **ptr,char *buff,char *sep, size_t bufsize)
{
	BOOL ret;
	if (!ptr) ptr = &last_ptr;

	ret = next_token(ptr, buff, sep, bufsize);
	last_ptr = *ptr;
	return ret;	
}

static uint16 tmpbuf[sizeof(pstring)];

void set_first_token(char *ptr)
{
	last_ptr = ptr;
}


/****************************************************************************
Convert list of tokens to array; dependent on above routine.
Uses last_ptr from above - bit of a hack.
****************************************************************************/
char **toktocliplist(int *ctok, char *sep)
{
	char *s=last_ptr;
	int ictok=0;
	char **ret, **iret;

	if (!sep) sep = " \t\n\r";

	while(*s && strchr_m(sep,*s)) s++;

	/* nothing left? */
	if (!*s) return(NULL);

	do {
		ictok++;
		while(*s && (!strchr_m(sep,*s))) s++;
		while(*s && strchr_m(sep,*s)) *s++=0;
	} while(*s);
	
	*ctok=ictok;
	s=last_ptr;
	
	if (!(ret=iret=malloc(ictok*sizeof(char *)))) return NULL;
	
	while(ictok--) {    
		*iret++=s;
		while(*s++);
		while(!*s) s++;
	}

	return ret;
}

/*******************************************************************
  case insensitive string compararison
********************************************************************/
int StrCaseCmp(const char *s, const char *t)
{
	pstring buf1, buf2;
	unix_strupper(s, strlen(s)+1, buf1, sizeof(buf1));
	unix_strupper(t, strlen(t)+1, buf2, sizeof(buf2));
	return strcmp(buf1,buf2);
}

/*******************************************************************
  case insensitive string compararison, length limited
********************************************************************/
int StrnCaseCmp(const char *s, const char *t, size_t n)
{
	pstring buf1, buf2;
	unix_strupper(s, strlen(s)+1, buf1, sizeof(buf1));
	unix_strupper(t, strlen(t)+1, buf2, sizeof(buf2));
	return strncmp(buf1,buf2,n);
}

/*******************************************************************
  compare 2 strings 
********************************************************************/
BOOL strequal(const char *s1, const char *s2)
{
	if (s1 == s2) return(True);
	if (!s1 || !s2) return(False);
  
	return(StrCaseCmp(s1,s2)==0);
}

/*******************************************************************
  compare 2 strings up to and including the nth char.
  ******************************************************************/
BOOL strnequal(const char *s1,const char *s2,size_t n)
{
  if (s1 == s2) return(True);
  if (!s1 || !s2 || !n) return(False);
  
  return(StrnCaseCmp(s1,s2,n)==0);
}

/*******************************************************************
  compare 2 strings (case sensitive)
********************************************************************/
BOOL strcsequal(const char *s1,const char *s2)
{
  if (s1 == s2) return(True);
  if (!s1 || !s2) return(False);
  
  return(strcmp(s1,s2)==0);
}

/***************************************************************************
Do a case-insensitive, whitespace-ignoring string compare.
***************************************************************************/
int strwicmp(const char *psz1, const char *psz2)
{
	/* if BOTH strings are NULL, return TRUE, if ONE is NULL return */
	/* appropriate value. */
	if (psz1 == psz2)
		return (0);
	else if (psz1 == NULL)
		return (-1);
	else if (psz2 == NULL)
		return (1);

	/* sync the strings on first non-whitespace */
	while (1)
	{
		while (isspace((int)*psz1))
			psz1++;
		while (isspace((int)*psz2))
			psz2++;
		if (toupper(*psz1) != toupper(*psz2) || *psz1 == '\0'
		    || *psz2 == '\0')
			break;
		psz1++;
		psz2++;
	}
	return (*psz1 - *psz2);
}


/*******************************************************************
  convert a string to "normal" form
********************************************************************/
void strnorm(char *s)
{
  extern int case_default;
  if (case_default == CASE_UPPER)
    strupper(s);
  else
    strlower(s);
}

/*******************************************************************
check if a string is in "normal" case
********************************************************************/
BOOL strisnormal(char *s)
{
	extern int case_default;
	if (case_default == CASE_UPPER)
		return(!strhaslower(s));
	
	return(!strhasupper(s));
}


/****************************************************************************
  string replace
  NOTE: oldc and newc must be 7 bit characters
****************************************************************************/
void string_replace(char *s,char oldc,char newc)
{
	push_ucs2(NULL, tmpbuf,s, sizeof(tmpbuf), STR_TERMINATE);
	string_replace_w(tmpbuf, UCS2_CHAR(oldc), UCS2_CHAR(newc));
	pull_ucs2(NULL, s, tmpbuf, -1, sizeof(tmpbuf), STR_TERMINATE);
}


/*******************************************************************
skip past some strings in a buffer
********************************************************************/
char *skip_string(char *buf,size_t n)
{
	while (n--)
		buf += strlen(buf) + 1;
	return(buf);
}

/*******************************************************************
 Count the number of characters in a string. Normally this will
 be the same as the number of bytes in a string for single byte strings,
 but will be different for multibyte.
********************************************************************/
size_t str_charnum(const char *s)
{
	push_ucs2(NULL, tmpbuf,s, sizeof(tmpbuf), STR_TERMINATE);
	return strlen_w(tmpbuf);
}

/*******************************************************************
trim the specified elements off the front and back of a string
********************************************************************/

BOOL trim_string(char *s,const char *front,const char *back)
{
	BOOL ret = False;
	size_t front_len;
	size_t back_len;
	size_t len;

	/* Ignore null or empty strings. */
	if (!s || (s[0] == '\0'))
		return False;

	front_len	= front? strlen(front) : 0;
	back_len	= back? strlen(back) : 0;

	len = strlen(s);

	if (front_len) {
		while (len && strncmp(s, front, front_len)==0) {
			memcpy(s, s+front_len, (len-front_len)+1);
			len -= front_len;
			ret=True;
		}
	}
	
	if (back_len) {
		while (strncmp(s+len-back_len,back,back_len)==0) {
			s[len-back_len]='\0';
			len -= back_len;
			ret=True;
		}
	}
	return ret;
}


/****************************************************************************
does a string have any uppercase chars in it?
****************************************************************************/
BOOL strhasupper(const char *s)
{
	smb_ucs2_t *ptr;
	push_ucs2(NULL, tmpbuf,s, sizeof(tmpbuf), STR_TERMINATE);
	for(ptr=tmpbuf;*ptr;ptr++)
		if(isupper_w(*ptr)) return True;
	return(False);
}

/****************************************************************************
does a string have any lowercase chars in it?
****************************************************************************/
BOOL strhaslower(const char *s)
{
	smb_ucs2_t *ptr;
	push_ucs2(NULL, tmpbuf,s, sizeof(tmpbuf), STR_TERMINATE);
	for(ptr=tmpbuf;*ptr;ptr++)
		if(islower_w(*ptr)) return True;
	return(False);
}

/****************************************************************************
find the number of 'c' chars in a string
****************************************************************************/
size_t count_chars(const char *s,char c)
{
	smb_ucs2_t *ptr;
	int count;
	push_ucs2(NULL, tmpbuf,s, sizeof(tmpbuf), STR_TERMINATE);
	for(count=0,ptr=tmpbuf;*ptr;ptr++) if(*ptr==UCS2_CHAR(c)) count++;
	return(count);
}

/*******************************************************************
Return True if a string consists only of one particular character.
********************************************************************/

BOOL str_is_all(const char *s,char c)
{
	smb_ucs2_t *ptr;

	if(s == NULL) return False;
	if(!*s) return False;
  
	push_ucs2(NULL, tmpbuf,s, sizeof(tmpbuf), STR_TERMINATE);
	for(ptr=tmpbuf;*ptr;ptr++) if(*ptr!=UCS2_CHAR(c)) return False;

	return True;
}

/*******************************************************************
safe string copy into a known length string. maxlength does not
include the terminating zero.
********************************************************************/

char *safe_strcpy(char *dest,const char *src, size_t maxlength)
{
	size_t len;

	if (!dest) {
		DEBUG(0,("ERROR: NULL dest in safe_strcpy\n"));
		return NULL;
	}

	if (!src) {
		*dest = 0;
		return dest;
	}  

	len = strlen(src);

	if (len > maxlength) {
		DEBUG(0,("ERROR: string overflow by %d in safe_strcpy [%.50s]\n",
			 (int)(len-maxlength), src));
		len = maxlength;
	}
      
	memmove(dest, src, len);
	dest[len] = 0;
	return dest;
}  

/*******************************************************************
safe string cat into a string. maxlength does not
include the terminating zero.
********************************************************************/

char *safe_strcat(char *dest, const char *src, size_t maxlength)
{
	size_t src_len, dest_len;

	if (!dest) {
		DEBUG(0,("ERROR: NULL dest in safe_strcat\n"));
		return NULL;
	}

	if (!src) {
		return dest;
	}  
	
	src_len = strlen(src);
	dest_len = strlen(dest);
	
	if (src_len + dest_len > maxlength) {
		DEBUG(0,("ERROR: string overflow by %d in safe_strcat [%.50s]\n",
			 (int)(src_len + dest_len - maxlength), src));
		src_len = maxlength - dest_len;
	}
	
	memcpy(&dest[dest_len], src, src_len);
	dest[dest_len + src_len] = 0;
	return dest;
}

/*******************************************************************
 Paranoid strcpy into a buffer of given length (includes terminating
 zero. Strips out all but 'a-Z0-9' and the character in other_safe_chars
 and replaces with '_'. Deliberately does *NOT* check for multibyte
 characters. Don't change it !
********************************************************************/

char *alpha_strcpy(char *dest, const char *src, const char *other_safe_chars, size_t maxlength)
{
	size_t len, i;

	if (!dest) {
		DEBUG(0,("ERROR: NULL dest in alpha_strcpy\n"));
		return NULL;
	}

	if (!src) {
		*dest = 0;
		return dest;
	}  

	len = strlen(src);
	if (len >= maxlength)
		len = maxlength - 1;

	if (!other_safe_chars)
		other_safe_chars = "";

	for(i = 0; i < len; i++) {
		int val = (src[i] & 0xff);
		if(isupper(val) || islower(val) || isdigit(val) || strchr_m(other_safe_chars, val))
			dest[i] = src[i];
		else
			dest[i] = '_';
	}

	dest[i] = '\0';

	return dest;
}

/****************************************************************************
 Like strncpy but always null terminates. Make sure there is room!
 The variable n should always be one less than the available size.
****************************************************************************/

char *StrnCpy(char *dest,const char *src,size_t n)
{
	char *d = dest;
	if (!dest) return(NULL);
	if (!src) {
		*dest = 0;
		return(dest);
	}
	while (n-- && (*d++ = *src++)) ;
	*d = 0;
	return(dest);
}

/****************************************************************************
like strncpy but copies up to the character marker.  always null terminates.
returns a pointer to the character marker in the source string (src).
****************************************************************************/
char *strncpyn(char *dest, const char *src,size_t n, char c)
{
	char *p;
	size_t str_len;

	p = strchr_m(src, c);
	if (p == NULL)
	{
		DEBUG(5, ("strncpyn: separator character (%c) not found\n", c));
		return NULL;
	}

	str_len = PTR_DIFF(p, src);
	strncpy(dest, src, MIN(n, str_len));
	dest[str_len] = '\0';

	return p;
}


/*************************************************************
 Routine to get hex characters and turn them into a 16 byte array.
 the array can be variable length, and any non-hex-numeric
 characters are skipped.  "0xnn" or "0Xnn" is specially catered
 for.

 valid examples: "0A5D15"; "0x15, 0x49, 0xa2"; "59\ta9\te3\n"

**************************************************************/
size_t strhex_to_str(char *p, size_t len, const char *strhex)
{
	size_t i;
	size_t num_chars = 0;
	unsigned char   lonybble, hinybble;
	char           *hexchars = "0123456789ABCDEF";
	char           *p1 = NULL, *p2 = NULL;

	for (i = 0; i < len && strhex[i] != 0; i++)
	{
		if (strnequal(hexchars, "0x", 2))
		{
			i++; /* skip two chars */
			continue;
		}

		if (!(p1 = strchr_m(hexchars, toupper(strhex[i]))))
		{
			break;
		}

		i++; /* next hex digit */

		if (!(p2 = strchr_m(hexchars, toupper(strhex[i]))))
		{
			break;
		}

		/* get the two nybbles */
		hinybble = PTR_DIFF(p1, hexchars);
		lonybble = PTR_DIFF(p2, hexchars);

		p[num_chars] = (hinybble << 4) | lonybble;
		num_chars++;

		p1 = NULL;
		p2 = NULL;
	}
	return num_chars;
}

/****************************************************************************
check if a string is part of a list
****************************************************************************/
BOOL in_list(char *s,char *list,BOOL casesensitive)
{
  pstring tok;
  char *p=list;

  if (!list) return(False);

  while (next_token(&p,tok,LIST_SEP,sizeof(tok))) {
    if (casesensitive) {
      if (strcmp(tok,s) == 0)
        return(True);
    } else {
      if (StrCaseCmp(tok,s) == 0)
        return(True);
    }
  }
  return(False);
}

/* this is used to prevent lots of mallocs of size 1 */
static char *null_string = NULL;

/****************************************************************************
set a string value, allocing the space for the string
****************************************************************************/
static BOOL string_init(char **dest,const char *src)
{
  size_t l;
  if (!src)     
    src = "";

  l = strlen(src);

  if (l == 0)
    {
      if (!null_string) {
        if((null_string = (char *)malloc(1)) == NULL) {
          DEBUG(0,("string_init: malloc fail for null_string.\n"));
          return False;
        }
        *null_string = 0;
      }
      *dest = null_string;
    }
  else
    {
      (*dest) = (char *)malloc(l+1);
      if ((*dest) == NULL) {
	      DEBUG(0,("Out of memory in string_init\n"));
	      return False;
      }

      pstrcpy(*dest,src);
    }
  return(True);
}

/****************************************************************************
free a string value
****************************************************************************/
void string_free(char **s)
{
  if (!s || !(*s)) return;
  if (*s == null_string)
    *s = NULL;
  SAFE_FREE(*s);
}

/****************************************************************************
set a string value, allocing the space for the string, and deallocating any 
existing space
****************************************************************************/
BOOL string_set(char **dest,const char *src)
{
  string_free(dest);

  return(string_init(dest,src));
}


/****************************************************************************
substitute a string for a pattern in another string. Make sure there is 
enough room!

This routine looks for pattern in s and replaces it with 
insert. It may do multiple replacements.

any of " ; ' $ or ` in the insert string are replaced with _
if len==0 then no length check is performed
****************************************************************************/
void string_sub(char *s,const char *pattern,const char *insert, size_t len)
{
	char *p;
	ssize_t ls,lp,li, i;

	if (!insert || !pattern || !s) return;

	ls = (ssize_t)strlen(s);
	lp = (ssize_t)strlen(pattern);
	li = (ssize_t)strlen(insert);

	if (!*pattern) return;
	
	while (lp <= ls && (p = strstr(s,pattern))) {
		if (len && (ls + (li-lp) >= len)) {
			DEBUG(0,("ERROR: string overflow by %d in string_sub(%.50s, %d)\n", 
				 (int)(ls + (li-lp) - len),
				 pattern, (int)len));
			break;
		}
		if (li != lp) {
			memmove(p+li,p+lp,strlen(p+lp)+1);
		}
		for (i=0;i<li;i++) {
			switch (insert[i]) {
			case '`':
			case '"':
			case '\'':
			case ';':
			case '$':
			case '%':
			case '\r':
			case '\n':
				p[i] = '_';
				break;
			default:
				p[i] = insert[i];
			}
		}
		s = p + li;
		ls += (li-lp);
	}
}

void fstring_sub(char *s,const char *pattern,const char *insert)
{
	string_sub(s, pattern, insert, sizeof(fstring));
}

void pstring_sub(char *s,const char *pattern,const char *insert)
{
	string_sub(s, pattern, insert, sizeof(pstring));
}

/****************************************************************************
similar to string_sub() but allows for any character to be substituted. 
Use with caution!
if len==0 then no length check is performed
****************************************************************************/
void all_string_sub(char *s,const char *pattern,const char *insert, size_t len)
{
	char *p;
	ssize_t ls,lp,li;

	if (!insert || !pattern || !s) return;

	ls = (ssize_t)strlen(s);
	lp = (ssize_t)strlen(pattern);
	li = (ssize_t)strlen(insert);

	if (!*pattern) return;
	
	while (lp <= ls && (p = strstr(s,pattern))) {
		if (len && (ls + (li-lp) >= len)) {
			DEBUG(0,("ERROR: string overflow by %d in all_string_sub(%.50s, %d)\n", 
				 (int)(ls + (li-lp) - len),
				 pattern, (int)len));
			break;
		}
		if (li != lp) {
			memmove(p+li,p+lp,strlen(p+lp)+1);
		}
		memcpy(p, insert, li);
		s = p + li;
		ls += (li-lp);
	}
}

/****************************************************************************
similar to all_string_sub but for unicode strings.
return a new allocate unicode string.
len is the number of bytes, not chars
  similar to string_sub() but allows for any character to be substituted.
  Use with caution!
  if len==0 then no length check is performed
****************************************************************************/

smb_ucs2_t *all_string_sub_w(smb_ucs2_t *s, const smb_ucs2_t *pattern,
					    const smb_ucs2_t *insert)
{
	smb_ucs2_t *r, *rp, *sp;
	size_t	lr, lp, li, lt;

	if (!insert || !pattern || !*pattern || !s) return NULL;

	lt = (size_t)strlen_w(s);
	lp = (size_t)strlen_w(pattern);
	li = (size_t)strlen_w(insert);

	if (li > lp) {
		smb_ucs2_t *st = s;
		int ld = li - lp;
		while ((sp = strstr_w(st, pattern))) {
			st = sp + lp;
			lt += ld;
		}
	}

	r = rp = (smb_ucs2_t *)malloc((lt + 1)*(sizeof(smb_ucs2_t)));
	if (!r) {
		DEBUG(0, ("all_string_sub_w: out of memory!\n"));
		return NULL;
	}

	while ((sp = strstr_w(s, pattern))) {
		memcpy(rp, s, (sp - s));
		rp += ((sp - s) / sizeof(smb_ucs2_t));
		memcpy(rp, insert, (li * sizeof(smb_ucs2_t)));
		s = sp + lp;
		rp += li;
	}
	lr = ((rp - r) / sizeof(smb_ucs2_t));
	if (lr < lt) {
		memcpy(rp, s, ((lt - lr) * sizeof(smb_ucs2_t)));
		rp += (lt - lr);
	}
	*rp = 0;

	return r;
}

smb_ucs2_t *all_string_sub_wa(smb_ucs2_t *s, const char *pattern,
					     const char *insert)
{
	wpstring p, i;

	if (!insert || !pattern || !s) return NULL;
	push_ucs2(NULL, p, pattern, sizeof(wpstring) - 1, STR_TERMINATE);
	push_ucs2(NULL, i, insert, sizeof(wpstring) - 1, STR_TERMINATE);
	return all_string_sub_w(s, p, i);
}

/****************************************************************************
 splits out the front and back at a separator.
****************************************************************************/
void split_at_last_component(char *path, char *front, char sep, char *back)
{
	char *p = strrchr_m(path, sep);

	if (p != NULL)
	{
		*p = 0;
	}
	if (front != NULL)
	{
		pstrcpy(front, path);
	}
	if (p != NULL)
	{
		if (back != NULL)
		{
			pstrcpy(back, p+1);
		}
		*p = '\\';
	}
	else
	{
		if (back != NULL)
		{
			back[0] = 0;
		}
	}
}


/****************************************************************************
write an octal as a string
****************************************************************************/
char *octal_string(int i)
{
	static char ret[64];
	if (i == -1) {
		return "-1";
	}
	slprintf(ret, sizeof(ret)-1, "0%o", i);
	return ret;
}


/****************************************************************************
truncate a string at a specified length
****************************************************************************/
char *string_truncate(char *s, int length)
{
	if (s && strlen(s) > length) {
		s[length] = 0;
	}
	return s;
}


/****************************************************************************
strchr and strrchr_m are very hard to do on general multi-byte strings. 
we convert via ucs2 for now
****************************************************************************/
char *strchr_m(const char *s, char c)
{
	wpstring ws;
	pstring s2;
	smb_ucs2_t *p;

	push_ucs2(NULL, ws, s, sizeof(ws), STR_TERMINATE);
	p = strchr_w(ws, UCS2_CHAR(c));
	if (!p) return NULL;
	*p = 0;
	pull_ucs2_pstring(s2, ws);
	return (char *)(s+strlen(s2));
}

char *strrchr_m(const char *s, char c)
{
	wpstring ws;
	pstring s2;
	smb_ucs2_t *p;

	push_ucs2(NULL, ws, s, sizeof(ws), STR_TERMINATE);
	p = strrchr_w(ws, UCS2_CHAR(c));
	if (!p) return NULL;
	*p = 0;
	pull_ucs2_pstring(s2, ws);
	return (char *)(s+strlen(s2));
}

/*******************************************************************
  convert a string to lower case
********************************************************************/
void strlower_m(char *s)
{
	/* I assume that lowercased string takes the same number of bytes
	 * as source string even in UTF-8 encoding. (VIV) */
	unix_strlower(s,strlen(s)+1,s,strlen(s)+1);	
}

/*******************************************************************
  convert a string to upper case
********************************************************************/
void strupper_m(char *s)
{
	/* I assume that lowercased string takes the same number of bytes
	 * as source string even in multibyte encoding. (VIV) */
	unix_strupper(s,strlen(s)+1,s,strlen(s)+1);	
}

/*
  return a RFC2254 binary string representation of a buffer
  used in LDAP filters
  caller must free
*/
char *binary_string(char *buf, int len)
{
	char *s;
	int i, j;
	const char *hex = "0123456789ABCDEF";
	s = malloc(len * 3 + 1);
	if (!s) return NULL;
	for (j=i=0;i<len;i++) {
		s[j] = '\\';
		s[j+1] = hex[((unsigned char)buf[i]) >> 4];
		s[j+2] = hex[((unsigned char)buf[i]) & 0xF];
		j += 3;
	}
	s[j] = 0;
	return s;
}


/* Just a typesafety wrapper for snprintf into a pstring */
int pstr_sprintf(pstring s, const char *fmt, ...)
{
	va_list ap;
	int ret;

	va_start(ap, fmt);
	ret = vsnprintf(s, PSTRING_LEN, fmt, ap);
	va_end(ap);
	return ret;
}


/* Just a typesafety wrapper for snprintf into a pstring */
int fstr_sprintf(fstring s, const char *fmt, ...)
{
	va_list ap;
	int ret;

	va_start(ap, fmt);
	ret = vsnprintf(s, FSTRING_LEN, fmt, ap);
	va_end(ap);
	return ret;
}