49ffc968548ff183445c132e2652cb631ab12408
[exim.git] / src / src / string.c
1 /* $Cambridge: exim/src/src/string.c,v 1.15 2009/11/16 19:50:37 nm4 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2009 */
8 /* See the file NOTICE for conditions of use and distribution. */
9
10 /* Miscellaneous string-handling functions. Some are not required for
11 utilities and tests, and are cut out by the COMPILE_UTILITY macro. */
12
13
14 #include "exim.h"
15
16
17 #ifndef COMPILE_UTILITY
18 /*************************************************
19 * Test for IP address *
20 *************************************************/
21
22 /* This used just to be a regular expression, but with IPv6 things are a bit
23 more complicated. If the address contains a colon, it is assumed to be a v6
24 address (assuming HAVE_IPV6 is set). If a mask is permitted and one is present,
25 and maskptr is not NULL, its offset is placed there.
26
27 Arguments:
28 s a string
29 maskptr NULL if no mask is permitted to follow
30 otherwise, points to an int where the offset of '/' is placed
31 if there is no / followed by trailing digits, *maskptr is set 0
32
33 Returns: 0 if the string is not a textual representation of an IP address
34 4 if it is an IPv4 address
35 6 if it is an IPv6 address
36 */
37
38 int
39 string_is_ip_address(uschar *s, int *maskptr)
40 {
41 int i;
42 int yield = 4;
43
44 /* If an optional mask is permitted, check for it. If found, pass back the
45 offset. */
46
47 if (maskptr != NULL)
48 {
49 uschar *ss = s + Ustrlen(s);
50 *maskptr = 0;
51 if (s != ss && isdigit(*(--ss)))
52 {
53 while (ss > s && isdigit(ss[-1])) ss--;
54 if (ss > s && *(--ss) == '/') *maskptr = ss - s;
55 }
56 }
57
58 /* A colon anywhere in the string => IPv6 address */
59
60 if (Ustrchr(s, ':') != NULL)
61 {
62 BOOL had_double_colon = FALSE;
63 BOOL v4end = FALSE;
64 int count = 0;
65
66 yield = 6;
67
68 /* An IPv6 address must start with hex digit or double colon. A single
69 colon is invalid. */
70
71 if (*s == ':' && *(++s) != ':') return 0;
72
73 /* Now read up to 8 components consisting of up to 4 hex digits each. There
74 may be one and only one appearance of double colon, which implies any number
75 of binary zero bits. The number of preceding components is held in count. */
76
77 for (count = 0; count < 8; count++)
78 {
79 /* If the end of the string is reached before reading 8 components, the
80 address is valid provided a double colon has been read. This also applies
81 if we hit the / that introduces a mask or the % that introduces the
82 interface specifier (scope id) of a link-local address. */
83
84 if (*s == 0 || *s == '%' || *s == '/') return had_double_colon? yield : 0;
85
86 /* If a component starts with an additional colon, we have hit a double
87 colon. This is permitted to appear once only, and counts as at least
88 one component. The final component may be of this form. */
89
90 if (*s == ':')
91 {
92 if (had_double_colon) return 0;
93 had_double_colon = TRUE;
94 s++;
95 continue;
96 }
97
98 /* If the remainder of the string contains a dot but no colons, we
99 can expect a trailing IPv4 address. This is valid if either there has
100 been no double-colon and this is the 7th component (with the IPv4 address
101 being the 7th & 8th components), OR if there has been a double-colon
102 and fewer than 6 components. */
103
104 if (Ustrchr(s, ':') == NULL && Ustrchr(s, '.') != NULL)
105 {
106 if ((!had_double_colon && count != 6) ||
107 (had_double_colon && count > 6)) return 0;
108 v4end = TRUE;
109 yield = 6;
110 break;
111 }
112
113 /* Check for at least one and not more than 4 hex digits for this
114 component. */
115
116 if (!isxdigit(*s++)) return 0;
117 if (isxdigit(*s) && isxdigit(*(++s)) && isxdigit(*(++s))) s++;
118
119 /* If the component is terminated by colon and there is more to
120 follow, skip over the colon. If there is no more to follow the address is
121 invalid. */
122
123 if (*s == ':' && *(++s) == 0) return 0;
124 }
125
126 /* If about to handle a trailing IPv4 address, drop through. Otherwise
127 all is well if we are at the end of the string or at the mask or at a percent
128 sign, which introduces the interface specifier (scope id) of a link local
129 address. */
130
131 if (!v4end)
132 return (*s == 0 || *s == '%' ||
133 (*s == '/' && maskptr != NULL && *maskptr != 0))? yield : 0;
134 }
135
136 /* Test for IPv4 address, which may be the tail-end of an IPv6 address. */
137
138 for (i = 0; i < 4; i++)
139 {
140 if (i != 0 && *s++ != '.') return 0;
141 if (!isdigit(*s++)) return 0;
142 if (isdigit(*s) && isdigit(*(++s))) s++;
143 }
144
145 return (*s == 0 || (*s == '/' && maskptr != NULL && *maskptr != 0))?
146 yield : 0;
147 }
148 #endif /* COMPILE_UTILITY */
149
150
151 /*************************************************
152 * Format message size *
153 *************************************************/
154
155 /* Convert a message size in bytes to printing form, rounding
156 according to the magnitude of the number. A value of zero causes
157 a string of spaces to be returned.
158
159 Arguments:
160 size the message size in bytes
161 buffer where to put the answer
162
163 Returns: pointer to the buffer
164 a string of exactly 5 characters is normally returned
165 */
166
167 uschar *
168 string_format_size(int size, uschar *buffer)
169 {
170 if (size == 0) Ustrcpy(CS buffer, " ");
171 else if (size < 1024) sprintf(CS buffer, "%5d", size);
172 else if (size < 10*1024)
173 sprintf(CS buffer, "%4.1fK", (double)size / 1024.0);
174 else if (size < 1024*1024)
175 sprintf(CS buffer, "%4dK", (size + 512)/1024);
176 else if (size < 10*1024*1024)
177 sprintf(CS buffer, "%4.1fM", (double)size / (1024.0 * 1024.0));
178 else
179 sprintf(CS buffer, "%4dM", (size + 512 * 1024)/(1024*1024));
180 return buffer;
181 }
182
183
184
185 #ifndef COMPILE_UTILITY
186 /*************************************************
187 * Convert a number to base 62 format *
188 *************************************************/
189
190 /* Convert a long integer into an ASCII base 62 string. For Cygwin the value of
191 BASE_62 is actually 36. Always return exactly 6 characters plus zero, in a
192 static area.
193
194 Argument: a long integer
195 Returns: pointer to base 62 string
196 */
197
198 uschar *
199 string_base62(unsigned long int value)
200 {
201 static uschar yield[7];
202 uschar *p = yield + sizeof(yield) - 1;
203 *p = 0;
204 while (p > yield)
205 {
206 *(--p) = base62_chars[value % BASE_62];
207 value /= BASE_62;
208 }
209 return yield;
210 }
211 #endif /* COMPILE_UTILITY */
212
213
214
215 #ifndef COMPILE_UTILITY
216 /*************************************************
217 * Interpret escape sequence *
218 *************************************************/
219
220 /* This function is called from several places where escape sequences are to be
221 interpreted in strings.
222
223 Arguments:
224 pp points a pointer to the initiating "\" in the string;
225 the pointer gets updated to point to the final character
226 Returns: the value of the character escape
227 */
228
229 int
230 string_interpret_escape(uschar **pp)
231 {
232 int ch;
233 uschar *p = *pp;
234 ch = *(++p);
235 if (isdigit(ch) && ch != '8' && ch != '9')
236 {
237 ch -= '0';
238 if (isdigit(p[1]) && p[1] != '8' && p[1] != '9')
239 {
240 ch = ch * 8 + *(++p) - '0';
241 if (isdigit(p[1]) && p[1] != '8' && p[1] != '9')
242 ch = ch * 8 + *(++p) - '0';
243 }
244 }
245 else switch(ch)
246 {
247 case 'n': ch = '\n'; break;
248 case 'r': ch = '\r'; break;
249 case 't': ch = '\t'; break;
250 case 'x':
251 ch = 0;
252 if (isxdigit(p[1]))
253 {
254 ch = ch * 16 +
255 Ustrchr(hex_digits, tolower(*(++p))) - hex_digits;
256 if (isxdigit(p[1])) ch = ch * 16 +
257 Ustrchr(hex_digits, tolower(*(++p))) - hex_digits;
258 }
259 break;
260 }
261 *pp = p;
262 return ch;
263 }
264 #endif /* COMPILE_UTILITY */
265
266
267
268 #ifndef COMPILE_UTILITY
269 /*************************************************
270 * Ensure string is printable *
271 *************************************************/
272
273 /* This function is called for critical strings. It checks for any
274 non-printing characters, and if any are found, it makes a new copy
275 of the string with suitable escape sequences. It is most often called by the
276 macro string_printing(), which sets allow_tab TRUE.
277
278 Arguments:
279 s the input string
280 allow_tab TRUE to allow tab as a printing character
281
282 Returns: string with non-printers encoded as printing sequences
283 */
284
285 uschar *
286 string_printing2(uschar *s, BOOL allow_tab)
287 {
288 int nonprintcount = 0;
289 int length = 0;
290 uschar *t = s;
291 uschar *ss, *tt;
292
293 while (*t != 0)
294 {
295 int c = *t++;
296 if (!mac_isprint(c) || (!allow_tab && c == '\t')) nonprintcount++;
297 length++;
298 }
299
300 if (nonprintcount == 0) return s;
301
302 /* Get a new block of store guaranteed big enough to hold the
303 expanded string. */
304
305 ss = store_get(length + nonprintcount * 4 + 1);
306
307 /* Copy everying, escaping non printers. */
308
309 t = s;
310 tt = ss;
311
312 while (*t != 0)
313 {
314 int c = *t;
315 if (mac_isprint(c) && (allow_tab || c != '\t')) *tt++ = *t++; else
316 {
317 *tt++ = '\\';
318 switch (*t)
319 {
320 case '\n': *tt++ = 'n'; break;
321 case '\r': *tt++ = 'r'; break;
322 case '\b': *tt++ = 'b'; break;
323 case '\v': *tt++ = 'v'; break;
324 case '\f': *tt++ = 'f'; break;
325 case '\t': *tt++ = 't'; break;
326 default: sprintf(CS tt, "%03o", *t); tt += 3; break;
327 }
328 t++;
329 }
330 }
331 *tt = 0;
332 return ss;
333 }
334 #endif /* COMPILE_UTILITY */
335
336
337
338
339 /*************************************************
340 * Copy and save string *
341 *************************************************/
342
343 /* This function assumes that memcpy() is faster than strcpy().
344
345 Argument: string to copy
346 Returns: copy of string in new store
347 */
348
349 uschar *
350 string_copy(uschar *s)
351 {
352 int len = Ustrlen(s) + 1;
353 uschar *ss = store_get(len);
354 memcpy(ss, s, len);
355 return ss;
356 }
357
358
359
360 /*************************************************
361 * Copy and save string in malloc'd store *
362 *************************************************/
363
364 /* This function assumes that memcpy() is faster than strcpy().
365
366 Argument: string to copy
367 Returns: copy of string in new store
368 */
369
370 uschar *
371 string_copy_malloc(uschar *s)
372 {
373 int len = Ustrlen(s) + 1;
374 uschar *ss = store_malloc(len);
375 memcpy(ss, s, len);
376 return ss;
377 }
378
379
380
381 /*************************************************
382 * Copy, lowercase and save string *
383 *************************************************/
384
385 /*
386 Argument: string to copy
387 Returns: copy of string in new store, with letters lowercased
388 */
389
390 uschar *
391 string_copylc(uschar *s)
392 {
393 uschar *ss = store_get(Ustrlen(s) + 1);
394 uschar *p = ss;
395 while (*s != 0) *p++ = tolower(*s++);
396 *p = 0;
397 return ss;
398 }
399
400
401
402 /*************************************************
403 * Copy and save string, given length *
404 *************************************************/
405
406 /* It is assumed the data contains no zeros. A zero is added
407 onto the end.
408
409 Arguments:
410 s string to copy
411 n number of characters
412
413 Returns: copy of string in new store
414 */
415
416 uschar *
417 string_copyn(uschar *s, int n)
418 {
419 uschar *ss = store_get(n + 1);
420 Ustrncpy(ss, s, n);
421 ss[n] = 0;
422 return ss;
423 }
424
425
426 /*************************************************
427 * Copy, lowercase, and save string, given length *
428 *************************************************/
429
430 /* It is assumed the data contains no zeros. A zero is added
431 onto the end.
432
433 Arguments:
434 s string to copy
435 n number of characters
436
437 Returns: copy of string in new store, with letters lowercased
438 */
439
440 uschar *
441 string_copynlc(uschar *s, int n)
442 {
443 uschar *ss = store_get(n + 1);
444 uschar *p = ss;
445 while (n-- > 0) *p++ = tolower(*s++);
446 *p = 0;
447 return ss;
448 }
449
450
451
452 /*************************************************
453 * Copy string if long, inserting newlines *
454 *************************************************/
455
456 /* If the given string is longer than 75 characters, it is copied, and within
457 the copy, certain space characters are converted into newlines.
458
459 Argument: pointer to the string
460 Returns: pointer to the possibly altered string
461 */
462
463 uschar *
464 string_split_message(uschar *msg)
465 {
466 uschar *s, *ss;
467
468 if (msg == NULL || Ustrlen(msg) <= 75) return msg;
469 s = ss = msg = string_copy(msg);
470
471 for (;;)
472 {
473 int i = 0;
474 while (i < 75 && *ss != 0 && *ss != '\n') ss++, i++;
475 if (*ss == 0) break;
476 if (*ss == '\n')
477 s = ++ss;
478 else
479 {
480 uschar *t = ss + 1;
481 uschar *tt = NULL;
482 while (--t > s + 35)
483 {
484 if (*t == ' ')
485 {
486 if (t[-1] == ':') { tt = t; break; }
487 if (tt == NULL) tt = t;
488 }
489 }
490
491 if (tt == NULL) /* Can't split behind - try ahead */
492 {
493 t = ss + 1;
494 while (*t != 0)
495 {
496 if (*t == ' ' || *t == '\n')
497 { tt = t; break; }
498 t++;
499 }
500 }
501
502 if (tt == NULL) break; /* Can't find anywhere to split */
503 *tt = '\n';
504 s = ss = tt+1;
505 }
506 }
507
508 return msg;
509 }
510
511
512
513 /*************************************************
514 * Copy returned DNS domain name, de-escaping *
515 *************************************************/
516
517 /* If a domain name contains top-bit characters, some resolvers return
518 the fully qualified name with those characters turned into escapes. The
519 convention is a backslash followed by _decimal_ digits. We convert these
520 back into the original binary values. This will be relevant when
521 allow_utf8_domains is set true and UTF-8 characters are used in domain
522 names. Backslash can also be used to escape other characters, though we
523 shouldn't come across them in domain names.
524
525 Argument: the domain name string
526 Returns: copy of string in new store, de-escaped
527 */
528
529 uschar *
530 string_copy_dnsdomain(uschar *s)
531 {
532 uschar *yield;
533 uschar *ss = yield = store_get(Ustrlen(s) + 1);
534
535 while (*s != 0)
536 {
537 if (*s != '\\')
538 {
539 *ss++ = *s++;
540 }
541 else if (isdigit(s[1]))
542 {
543 *ss++ = (s[1] - '0')*100 + (s[2] - '0')*10 + s[3] - '0';
544 s += 4;
545 }
546 else if (*(++s) != 0)
547 {
548 *ss++ = *s++;
549 }
550 }
551
552 *ss = 0;
553 return yield;
554 }
555
556
557 #ifndef COMPILE_UTILITY
558 /*************************************************
559 * Copy space-terminated or quoted string *
560 *************************************************/
561
562 /* This function copies from a string until its end, or until whitespace is
563 encountered, unless the string begins with a double quote, in which case the
564 terminating quote is sought, and escaping within the string is done. The length
565 of a de-quoted string can be no longer than the original, since escaping always
566 turns n characters into 1 character.
567
568 Argument: pointer to the pointer to the first character, which gets updated
569 Returns: the new string
570 */
571
572 uschar *
573 string_dequote(uschar **sptr)
574 {
575 uschar *s = *sptr;
576 uschar *t, *yield;
577
578 /* First find the end of the string */
579
580 if (*s != '\"')
581 {
582 while (*s != 0 && !isspace(*s)) s++;
583 }
584 else
585 {
586 s++;
587 while (*s != 0 && *s != '\"')
588 {
589 if (*s == '\\') (void)string_interpret_escape(&s);
590 s++;
591 }
592 if (*s != 0) s++;
593 }
594
595 /* Get enough store to copy into */
596
597 t = yield = store_get(s - *sptr + 1);
598 s = *sptr;
599
600 /* Do the copy */
601
602 if (*s != '\"')
603 {
604 while (*s != 0 && !isspace(*s)) *t++ = *s++;
605 }
606 else
607 {
608 s++;
609 while (*s != 0 && *s != '\"')
610 {
611 if (*s == '\\') *t++ = string_interpret_escape(&s);
612 else *t++ = *s;
613 s++;
614 }
615 if (*s != 0) s++;
616 }
617
618 /* Update the pointer and return the terminated copy */
619
620 *sptr = s;
621 *t = 0;
622 return yield;
623 }
624 #endif /* COMPILE_UTILITY */
625
626
627
628 /*************************************************
629 * Format a string and save it *
630 *************************************************/
631
632 /* The formatting is done by string_format, which checks the length of
633 everything.
634
635 Arguments:
636 format a printf() format - deliberately char * rather than uschar *
637 because it will most usually be a literal string
638 ... arguments for format
639
640 Returns: pointer to fresh piece of store containing sprintf'ed string
641 */
642
643 uschar *
644 string_sprintf(char *format, ...)
645 {
646 va_list ap;
647 uschar buffer[STRING_SPRINTF_BUFFER_SIZE];
648 va_start(ap, format);
649 if (!string_vformat(buffer, sizeof(buffer), format, ap))
650 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
651 "string_sprintf expansion was longer than %d", sizeof(buffer));
652 va_end(ap);
653 return string_copy(buffer);
654 }
655
656
657
658 /*************************************************
659 * Case-independent strncmp() function *
660 *************************************************/
661
662 /*
663 Arguments:
664 s first string
665 t second string
666 n number of characters to compare
667
668 Returns: < 0, = 0, or > 0, according to the comparison
669 */
670
671 int
672 strncmpic(uschar *s, uschar *t, int n)
673 {
674 while (n--)
675 {
676 int c = tolower(*s++) - tolower(*t++);
677 if (c) return c;
678 }
679 return 0;
680 }
681
682
683 /*************************************************
684 * Case-independent strcmp() function *
685 *************************************************/
686
687 /*
688 Arguments:
689 s first string
690 t second string
691
692 Returns: < 0, = 0, or > 0, according to the comparison
693 */
694
695 int
696 strcmpic(uschar *s, uschar *t)
697 {
698 while (*s != 0)
699 {
700 int c = tolower(*s++) - tolower(*t++);
701 if (c != 0) return c;
702 }
703 return *t;
704 }
705
706
707 /*************************************************
708 * Case-independent strstr() function *
709 *************************************************/
710
711 /* The third argument specifies whether whitespace is required
712 to follow the matched string.
713
714 Arguments:
715 s string to search
716 t substring to search for
717 space_follows if TRUE, match only if whitespace follows
718
719 Returns: pointer to substring in string, or NULL if not found
720 */
721
722 uschar *
723 strstric(uschar *s, uschar *t, BOOL space_follows)
724 {
725 uschar *p = t;
726 uschar *yield = NULL;
727 int cl = tolower(*p);
728 int cu = toupper(*p);
729
730 while (*s)
731 {
732 if (*s == cl || *s == cu)
733 {
734 if (yield == NULL) yield = s;
735 if (*(++p) == 0)
736 {
737 if (!space_follows || s[1] == ' ' || s[1] == '\n' ) return yield;
738 yield = NULL;
739 p = t;
740 }
741 cl = tolower(*p);
742 cu = toupper(*p);
743 s++;
744 }
745 else if (yield != NULL)
746 {
747 yield = NULL;
748 p = t;
749 cl = tolower(*p);
750 cu = toupper(*p);
751 }
752 else s++;
753 }
754 return NULL;
755 }
756
757
758
759 #ifndef COMPILE_UTILITY
760 /*************************************************
761 * Get next string from separated list *
762 *************************************************/
763
764 /* Leading and trailing space is removed from each item. The separator in the
765 list is controlled by the int pointed to by the separator argument as follows:
766
767 If the value is > 0 it is used as the separator. This is typically used for
768 sublists such as slash-separated options. The value is always a printing
769 character.
770
771 (If the value is actually > UCHAR_MAX there is only one item in the list.
772 This is used for some cases when called via functions that sometimes
773 plough through lists, and sometimes are given single items.)
774
775 If the value is <= 0, the string is inspected for a leading <x, where x is an
776 ispunct() or an iscntrl() character. If found, x is used as the separator. If
777 not found:
778
779 (a) if separator == 0, ':' is used
780 (b) if separator <0, -separator is used
781
782 In all cases the value of the separator that is used is written back to the
783 int so that it is used on subsequent calls as we progress through the list.
784
785 A literal ispunct() separator can be represented in an item by doubling, but
786 there is no way to include an iscntrl() separator as part of the data.
787
788 Arguments:
789 listptr points to a pointer to the current start of the list; the
790 pointer gets updated to point after the end of the next item
791 separator a pointer to the separator character in an int (see above)
792 buffer where to put a copy of the next string in the list; or
793 NULL if the next string is returned in new memory
794 buflen when buffer is not NULL, the size of buffer; otherwise ignored
795
796 Returns: pointer to buffer, containing the next substring,
797 or NULL if no more substrings
798 */
799
800 uschar *
801 string_nextinlist(uschar **listptr, int *separator, uschar *buffer, int buflen)
802 {
803 register int sep = *separator;
804 register uschar *s = *listptr;
805 BOOL sep_is_special;
806
807 if (s == NULL) return NULL;
808
809 /* This allows for a fixed specified separator to be an iscntrl() character,
810 but at the time of implementation, this is never the case. However, it's best
811 to be conservative. */
812
813 while (isspace(*s) && *s != sep) s++;
814
815 /* A change of separator is permitted, so look for a leading '<' followed by an
816 allowed character. */
817
818 if (sep <= 0)
819 {
820 if (*s == '<' && (ispunct(s[1]) || iscntrl(s[1])))
821 {
822 sep = s[1];
823 s += 2;
824 while (isspace(*s) && *s != sep) s++;
825 }
826 else
827 {
828 sep = (sep == 0)? ':' : -sep;
829 }
830 *separator = sep;
831 }
832
833 /* An empty string has no list elements */
834
835 if (*s == 0) return NULL;
836
837 /* Note whether whether or not the separator is an iscntrl() character. */
838
839 sep_is_special = iscntrl(sep);
840
841 /* Handle the case when a buffer is provided. */
842
843 if (buffer != NULL)
844 {
845 register int p = 0;
846 for (; *s != 0; s++)
847 {
848 if (*s == sep && (*(++s) != sep || sep_is_special)) break;
849 if (p < buflen - 1) buffer[p++] = *s;
850 }
851 while (p > 0 && isspace(buffer[p-1])) p--;
852 buffer[p] = 0;
853 }
854
855 /* Handle the case when a buffer is not provided. */
856
857 else
858 {
859 int size = 0;
860 int ptr = 0;
861 uschar *ss;
862
863 /* We know that *s != 0 at this point. However, it might be pointing to a
864 separator, which could indicate an empty string, or (if an ispunct()
865 character) could be doubled to indicate a separator character as data at the
866 start of a string. Avoid getting working memory for an empty item. */
867
868 if (*s == sep)
869 {
870 s++;
871 if (*s != sep || sep_is_special)
872 {
873 *listptr = s;
874 return string_copy(US"");
875 }
876 }
877
878 /* Not an empty string; the first character is guaranteed to be a data
879 character. */
880
881 for (;;)
882 {
883 for (ss = s + 1; *ss != 0 && *ss != sep; ss++);
884 buffer = string_cat(buffer, &size, &ptr, s, ss-s);
885 s = ss;
886 if (*s == 0 || *(++s) != sep || sep_is_special) break;
887 }
888 while (ptr > 0 && isspace(buffer[ptr-1])) ptr--;
889 buffer[ptr] = 0;
890 }
891
892 /* Update the current pointer and return the new string */
893
894 *listptr = s;
895 return buffer;
896 }
897 #endif /* COMPILE_UTILITY */
898
899
900
901 #ifndef COMPILE_UTILITY
902 /*************************************************
903 * Add chars to string *
904 *************************************************/
905
906 /* This function is used when building up strings of unknown length. Room is
907 always left for a terminating zero to be added to the string that is being
908 built. This function does not require the string that is being added to be NUL
909 terminated, because the number of characters to add is given explicitly. It is
910 sometimes called to extract parts of other strings.
911
912 Arguments:
913 string points to the start of the string that is being built, or NULL
914 if this is a new string that has no contents yet
915 size points to a variable that holds the current capacity of the memory
916 block (updated if changed)
917 ptr points to a variable that holds the offset at which to add
918 characters, updated to the new offset
919 s points to characters to add
920 count count of characters to add; must not exceed the length of s, if s
921 is a C string
922
923 If string is given as NULL, *size and *ptr should both be zero.
924
925 Returns: pointer to the start of the string, changed if copied for expansion.
926 Note that a NUL is not added, though space is left for one. This is
927 because string_cat() is often called multiple times to build up a
928 string - there's no point adding the NUL till the end.
929 */
930
931 uschar *
932 string_cat(uschar *string, int *size, int *ptr, const uschar *s, int count)
933 {
934 int p = *ptr;
935
936 if (p + count >= *size)
937 {
938 int oldsize = *size;
939
940 /* Mostly, string_cat() is used to build small strings of a few hundred
941 characters at most. There are times, however, when the strings are very much
942 longer (for example, a lookup that returns a vast number of alias addresses).
943 To try to keep things reasonable, we use increments whose size depends on the
944 existing length of the string. */
945
946 int inc = (oldsize < 4096)? 100 : 1024;
947 while (*size <= p + count) *size += inc;
948
949 /* New string */
950
951 if (string == NULL) string = store_get(*size);
952
953 /* Try to extend an existing allocation. If the result of calling
954 store_extend() is false, either there isn't room in the current memory block,
955 or this string is not the top item on the dynamic store stack. We then have
956 to get a new chunk of store and copy the old string. When building large
957 strings, it is helpful to call store_release() on the old string, to release
958 memory blocks that have become empty. (The block will be freed if the string
959 is at its start.) However, we can do this only if we know that the old string
960 was the last item on the dynamic memory stack. This is the case if it matches
961 store_last_get. */
962
963 else if (!store_extend(string, oldsize, *size))
964 {
965 BOOL release_ok = store_last_get[store_pool] == string;
966 uschar *newstring = store_get(*size);
967 memcpy(newstring, string, p);
968 if (release_ok) store_release(string);
969 string = newstring;
970 }
971 }
972
973 /* Because we always specify the exact number of characters to copy, we can
974 use memcpy(), which is likely to be more efficient than strncopy() because the
975 latter has to check for zero bytes. */
976
977 memcpy(string + p, s, count);
978 *ptr = p + count;
979 return string;
980 }
981 #endif /* COMPILE_UTILITY */
982
983
984
985 #ifndef COMPILE_UTILITY
986 /*************************************************
987 * Append strings to another string *
988 *************************************************/
989
990 /* This function can be used to build a string from many other strings.
991 It calls string_cat() to do the dirty work.
992
993 Arguments:
994 string points to the start of the string that is being built, or NULL
995 if this is a new string that has no contents yet
996 size points to a variable that holds the current capacity of the memory
997 block (updated if changed)
998 ptr points to a variable that holds the offset at which to add
999 characters, updated to the new offset
1000 count the number of strings to append
1001 ... "count" uschar* arguments, which must be valid zero-terminated
1002 C strings
1003
1004 Returns: pointer to the start of the string, changed if copied for expansion.
1005 The string is not zero-terminated - see string_cat() above.
1006 */
1007
1008 uschar *
1009 string_append(uschar *string, int *size, int *ptr, int count, ...)
1010 {
1011 va_list ap;
1012 int i;
1013
1014 va_start(ap, count);
1015 for (i = 0; i < count; i++)
1016 {
1017 uschar *t = va_arg(ap, uschar *);
1018 string = string_cat(string, size, ptr, t, Ustrlen(t));
1019 }
1020 va_end(ap);
1021
1022 return string;
1023 }
1024 #endif
1025
1026
1027
1028 /*************************************************
1029 * Format a string with length checks *
1030 *************************************************/
1031
1032 /* This function is used to format a string with checking of the length of the
1033 output for all conversions. It protects Exim from absent-mindedness when
1034 calling functions like debug_printf and string_sprintf, and elsewhere. There
1035 are two different entry points to what is actually the same function, depending
1036 on whether the variable length list of data arguments are given explicitly or
1037 as a va_list item.
1038
1039 The formats are the usual printf() ones, with some omissions (never used) and
1040 two additions for strings: %S forces lower case, and %#s or %#S prints nothing
1041 for a NULL string. Without the # "NULL" is printed (useful in debugging). There
1042 is also the addition of %D and %M, which insert the date in the form used for
1043 datestamped log files.
1044
1045 Arguments:
1046 buffer a buffer in which to put the formatted string
1047 buflen the length of the buffer
1048 format the format string - deliberately char * and not uschar *
1049 ... or ap variable list of supplementary arguments
1050
1051 Returns: TRUE if the result fitted in the buffer
1052 */
1053
1054 BOOL
1055 string_format(uschar *buffer, int buflen, char *format, ...)
1056 {
1057 BOOL yield;
1058 va_list ap;
1059 va_start(ap, format);
1060 yield = string_vformat(buffer, buflen, format, ap);
1061 va_end(ap);
1062 return yield;
1063 }
1064
1065
1066 BOOL
1067 string_vformat(uschar *buffer, int buflen, char *format, va_list ap)
1068 {
1069 enum { L_NORMAL, L_SHORT, L_LONG, L_LONGLONG, L_LONGDOUBLE };
1070
1071 BOOL yield = TRUE;
1072 int width, precision;
1073 char *fp = format; /* Deliberately not unsigned */
1074 uschar *p = buffer;
1075 uschar *last = buffer + buflen - 1;
1076
1077 string_datestamp_offset = -1; /* Datestamp not inserted */
1078 string_datestamp_length = 0; /* Datestamp not inserted */
1079 string_datestamp_type = 0; /* Datestamp not inserted */
1080
1081 /* Scan the format and handle the insertions */
1082
1083 while (*fp != 0)
1084 {
1085 int length = L_NORMAL;
1086 int *nptr;
1087 int slen;
1088 char *null = "NULL"; /* ) These variables */
1089 char *item_start, *s; /* ) are deliberately */
1090 char newformat[16]; /* ) not unsigned */
1091
1092 /* Non-% characters just get copied verbatim */
1093
1094 if (*fp != '%')
1095 {
1096 if (p >= last) { yield = FALSE; break; }
1097 *p++ = (uschar)*fp++;
1098 continue;
1099 }
1100
1101 /* Deal with % characters. Pick off the width and precision, for checking
1102 strings, skipping over the flag and modifier characters. */
1103
1104 item_start = fp;
1105 width = precision = -1;
1106
1107 if (strchr("-+ #0", *(++fp)) != NULL)
1108 {
1109 if (*fp == '#') null = "";
1110 fp++;
1111 }
1112
1113 if (isdigit((uschar)*fp))
1114 {
1115 width = *fp++ - '0';
1116 while (isdigit((uschar)*fp)) width = width * 10 + *fp++ - '0';
1117 }
1118 else if (*fp == '*')
1119 {
1120 width = va_arg(ap, int);
1121 fp++;
1122 }
1123
1124 if (*fp == '.')
1125 {
1126 if (*(++fp) == '*')
1127 {
1128 precision = va_arg(ap, int);
1129 fp++;
1130 }
1131 else
1132 {
1133 precision = 0;
1134 while (isdigit((uschar)*fp))
1135 precision = precision*10 + *fp++ - '0';
1136 }
1137 }
1138
1139 /* Skip over 'h', 'L', 'l', and 'll', remembering the item length */
1140
1141 if (*fp == 'h')
1142 { fp++; length = L_SHORT; }
1143 else if (*fp == 'L')
1144 { fp++; length = L_LONGDOUBLE; }
1145 else if (*fp == 'l')
1146 {
1147 if (fp[1] == 'l')
1148 {
1149 fp += 2;
1150 length = L_LONGLONG;
1151 }
1152 else
1153 {
1154 fp++;
1155 length = L_LONG;
1156 }
1157 }
1158
1159 /* Handle each specific format type. */
1160
1161 switch (*fp++)
1162 {
1163 case 'n':
1164 nptr = va_arg(ap, int *);
1165 *nptr = p - buffer;
1166 break;
1167
1168 case 'd':
1169 case 'o':
1170 case 'u':
1171 case 'x':
1172 case 'X':
1173 if (p >= last - ((length > L_LONG)? 24 : 12))
1174 { yield = FALSE; goto END_FORMAT; }
1175 strncpy(newformat, item_start, fp - item_start);
1176 newformat[fp - item_start] = 0;
1177
1178 /* Short int is promoted to int when passing through ..., so we must use
1179 int for va_arg(). */
1180
1181 switch(length)
1182 {
1183 case L_SHORT:
1184 case L_NORMAL: sprintf(CS p, newformat, va_arg(ap, int)); break;
1185 case L_LONG: sprintf(CS p, newformat, va_arg(ap, long int)); break;
1186 case L_LONGLONG: sprintf(CS p, newformat, va_arg(ap, LONGLONG_T)); break;
1187 }
1188 while (*p) p++;
1189 break;
1190
1191 case 'p':
1192 if (p >= last - 24) { yield = FALSE; goto END_FORMAT; }
1193 strncpy(newformat, item_start, fp - item_start);
1194 newformat[fp - item_start] = 0;
1195 sprintf(CS p, newformat, va_arg(ap, void *));
1196 while (*p) p++;
1197 break;
1198
1199 /* %f format is inherently insecure if the numbers that it may be
1200 handed are unknown (e.g. 1e300). However, in Exim, %f is used for
1201 printing load averages, and these are actually stored as integers
1202 (load average * 1000) so the size of the numbers is constrained.
1203 It is also used for formatting sending rates, where the simplicity
1204 of the format prevents overflow. */
1205
1206 case 'f':
1207 case 'e':
1208 case 'E':
1209 case 'g':
1210 case 'G':
1211 if (precision < 0) precision = 6;
1212 if (p >= last - precision - 8) { yield = FALSE; goto END_FORMAT; }
1213 strncpy(newformat, item_start, fp - item_start);
1214 newformat[fp-item_start] = 0;
1215 if (length == L_LONGDOUBLE)
1216 sprintf(CS p, newformat, va_arg(ap, long double));
1217 else
1218 sprintf(CS p, newformat, va_arg(ap, double));
1219 while (*p) p++;
1220 break;
1221
1222 /* String types */
1223
1224 case '%':
1225 if (p >= last) { yield = FALSE; goto END_FORMAT; }
1226 *p++ = '%';
1227 break;
1228
1229 case 'c':
1230 if (p >= last) { yield = FALSE; goto END_FORMAT; }
1231 *p++ = va_arg(ap, int);
1232 break;
1233
1234 case 'D': /* Insert daily datestamp for log file names */
1235 s = CS tod_stamp(tod_log_datestamp_daily);
1236 string_datestamp_offset = p - buffer; /* Passed back via global */
1237 string_datestamp_length = Ustrlen(s); /* Passed back via global */
1238 string_datestamp_type = tod_log_datestamp_daily;
1239 slen = string_datestamp_length;
1240 goto INSERT_STRING;
1241
1242 case 'M': /* Insert monthly datestamp for log file names */
1243 s = CS tod_stamp(tod_log_datestamp_monthly);
1244 string_datestamp_offset = p - buffer; /* Passed back via global */
1245 string_datestamp_length = Ustrlen(s); /* Passed back via global */
1246 string_datestamp_type = tod_log_datestamp_monthly;
1247 slen = string_datestamp_length;
1248 goto INSERT_STRING;
1249
1250 case 's':
1251 case 'S': /* Forces *lower* case */
1252 s = va_arg(ap, char *);
1253
1254 if (s == NULL) s = null;
1255 slen = Ustrlen(s);
1256
1257 INSERT_STRING: /* Come to from %D or %M above */
1258
1259 /* If the width is specified, check that there is a precision
1260 set; if not, set it to the width to prevent overruns of long
1261 strings. */
1262
1263 if (width >= 0)
1264 {
1265 if (precision < 0) precision = width;
1266 }
1267
1268 /* If a width is not specified and the precision is specified, set
1269 the width to the precision, or the string length if shorted. */
1270
1271 else if (precision >= 0)
1272 {
1273 width = (precision < slen)? precision : slen;
1274 }
1275
1276 /* If neither are specified, set them both to the string length. */
1277
1278 else width = precision = slen;
1279
1280 /* Check string space, and add the string to the buffer if ok. If
1281 not OK, add part of the string (debugging uses this to show as
1282 much as possible). */
1283
1284 if (p == last)
1285 {
1286 yield = FALSE;
1287 goto END_FORMAT;
1288 }
1289 if (p >= last - width)
1290 {
1291 yield = FALSE;
1292 width = precision = last - p - 1;
1293 if (width < 0) width = 0;
1294 if (precision < 0) precision = 0;
1295 }
1296 sprintf(CS p, "%*.*s", width, precision, s);
1297 if (fp[-1] == 'S')
1298 while (*p) { *p = tolower(*p); p++; }
1299 else
1300 while (*p) p++;
1301 if (!yield) goto END_FORMAT;
1302 break;
1303
1304 /* Some things are never used in Exim; also catches junk. */
1305
1306 default:
1307 strncpy(newformat, item_start, fp - item_start);
1308 newformat[fp-item_start] = 0;
1309 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "string_format: unsupported type "
1310 "in \"%s\" in \"%s\"", newformat, format);
1311 break;
1312 }
1313 }
1314
1315 /* Ensure string is complete; return TRUE if got to the end of the format */
1316
1317 END_FORMAT:
1318
1319 *p = 0;
1320 return yield;
1321 }
1322
1323
1324
1325 #ifndef COMPILE_UTILITY
1326 /*************************************************
1327 * Generate an "open failed" message *
1328 *************************************************/
1329
1330 /* This function creates a message after failure to open a file. It includes a
1331 string supplied as data, adds the strerror() text, and if the failure was
1332 "Permission denied", reads and includes the euid and egid.
1333
1334 Arguments:
1335 eno the value of errno after the failure
1336 format a text format string - deliberately not uschar *
1337 ... arguments for the format string
1338
1339 Returns: a message, in dynamic store
1340 */
1341
1342 uschar *
1343 string_open_failed(int eno, char *format, ...)
1344 {
1345 va_list ap;
1346 uschar buffer[1024];
1347
1348 Ustrcpy(buffer, "failed to open ");
1349 va_start(ap, format);
1350
1351 /* Use the checked formatting routine to ensure that the buffer
1352 does not overflow. It should not, since this is called only for internally
1353 specified messages. If it does, the message just gets truncated, and there
1354 doesn't seem much we can do about that. */
1355
1356 (void)string_vformat(buffer+15, sizeof(buffer) - 15, format, ap);
1357
1358 return (eno == EACCES)?
1359 string_sprintf("%s: %s (euid=%ld egid=%ld)", buffer, strerror(eno),
1360 (long int)geteuid(), (long int)getegid()) :
1361 string_sprintf("%s: %s", buffer, strerror(eno));
1362 }
1363 #endif /* COMPILE_UTILITY */
1364
1365
1366
1367 #ifndef COMPILE_UTILITY
1368 /*************************************************
1369 * Generate local prt for logging *
1370 *************************************************/
1371
1372 /* This function is a subroutine for use in string_log_address() below.
1373
1374 Arguments:
1375 addr the address being logged
1376 yield the current dynamic buffer pointer
1377 sizeptr points to current size
1378 ptrptr points to current insert pointer
1379
1380 Returns: the new value of the buffer pointer
1381 */
1382
1383 static uschar *
1384 string_get_localpart(address_item *addr, uschar *yield, int *sizeptr,
1385 int *ptrptr)
1386 {
1387 if (testflag(addr, af_include_affixes) && addr->prefix != NULL)
1388 yield = string_cat(yield, sizeptr, ptrptr, addr->prefix,
1389 Ustrlen(addr->prefix));
1390 yield = string_cat(yield, sizeptr, ptrptr, addr->local_part,
1391 Ustrlen(addr->local_part));
1392 if (testflag(addr, af_include_affixes) && addr->suffix != NULL)
1393 yield = string_cat(yield, sizeptr, ptrptr, addr->suffix,
1394 Ustrlen(addr->suffix));
1395 return yield;
1396 }
1397
1398
1399 /*************************************************
1400 * Generate log address list *
1401 *************************************************/
1402
1403 /* This function generates a list consisting of an address and its parents, for
1404 use in logging lines. For saved onetime aliased addresses, the onetime parent
1405 field is used. If the address was delivered by a transport with rcpt_include_
1406 affixes set, the af_include_affixes bit will be set in the address. In that
1407 case, we include the affixes here too.
1408
1409 Arguments:
1410 addr bottom (ultimate) address
1411 all_parents if TRUE, include all parents
1412 success TRUE for successful delivery
1413
1414 Returns: a string in dynamic store
1415 */
1416
1417 uschar *
1418 string_log_address(address_item *addr, BOOL all_parents, BOOL success)
1419 {
1420 int size = 64;
1421 int ptr = 0;
1422 BOOL add_topaddr = TRUE;
1423 uschar *yield = store_get(size);
1424 address_item *topaddr;
1425
1426 /* Find the ultimate parent */
1427
1428 for (topaddr = addr; topaddr->parent != NULL; topaddr = topaddr->parent);
1429
1430 /* We start with just the local part for pipe, file, and reply deliveries, and
1431 for successful local deliveries from routers that have the log_as_local flag
1432 set. File deliveries from filters can be specified as non-absolute paths in
1433 cases where the transport is goin to complete the path. If there is an error
1434 before this happens (expansion failure) the local part will not be updated, and
1435 so won't necessarily look like a path. Add extra text for this case. */
1436
1437 if (testflag(addr, af_pfr) ||
1438 (success &&
1439 addr->router != NULL && addr->router->log_as_local &&
1440 addr->transport != NULL && addr->transport->info->local))
1441 {
1442 if (testflag(addr, af_file) && addr->local_part[0] != '/')
1443 yield = string_cat(yield, &size, &ptr, CUS"save ", 5);
1444 yield = string_get_localpart(addr, yield, &size, &ptr);
1445 }
1446
1447 /* Other deliveries start with the full address. It we have split it into local
1448 part and domain, use those fields. Some early failures can happen before the
1449 splitting is done; in those cases use the original field. */
1450
1451 else
1452 {
1453 if (addr->local_part != NULL)
1454 {
1455 yield = string_get_localpart(addr, yield, &size, &ptr);
1456 yield = string_cat(yield, &size, &ptr, US"@", 1);
1457 yield = string_cat(yield, &size, &ptr, addr->domain,
1458 Ustrlen(addr->domain) );
1459 }
1460 else
1461 {
1462 yield = string_cat(yield, &size, &ptr, addr->address, Ustrlen(addr->address));
1463 }
1464 yield[ptr] = 0;
1465
1466 /* If the address we are going to print is the same as the top address,
1467 and all parents are not being included, don't add on the top address. First
1468 of all, do a caseless comparison; if this succeeds, do a caseful comparison
1469 on the local parts. */
1470
1471 if (strcmpic(yield, topaddr->address) == 0 &&
1472 Ustrncmp(yield, topaddr->address, Ustrchr(yield, '@') - yield) == 0 &&
1473 addr->onetime_parent == NULL &&
1474 (!all_parents || addr->parent == NULL || addr->parent == topaddr))
1475 add_topaddr = FALSE;
1476 }
1477
1478 /* If all parents are requested, or this is a local pipe/file/reply, and
1479 there is at least one intermediate parent, show it in brackets, and continue
1480 with all of them if all are wanted. */
1481
1482 if ((all_parents || testflag(addr, af_pfr)) &&
1483 addr->parent != NULL &&
1484 addr->parent != topaddr)
1485 {
1486 uschar *s = US" (";
1487 address_item *addr2;
1488 for (addr2 = addr->parent; addr2 != topaddr; addr2 = addr2->parent)
1489 {
1490 yield = string_cat(yield, &size, &ptr, s, 2);
1491 yield = string_cat(yield, &size, &ptr, addr2->address, Ustrlen(addr2->address));
1492 if (!all_parents) break;
1493 s = US", ";
1494 }
1495 yield = string_cat(yield, &size, &ptr, US")", 1);
1496 }
1497
1498 /* Add the top address if it is required */
1499
1500 if (add_topaddr)
1501 {
1502 yield = string_cat(yield, &size, &ptr, US" <", 2);
1503
1504 if (addr->onetime_parent == NULL)
1505 yield = string_cat(yield, &size, &ptr, topaddr->address,
1506 Ustrlen(topaddr->address));
1507 else
1508 yield = string_cat(yield, &size, &ptr, addr->onetime_parent,
1509 Ustrlen(addr->onetime_parent));
1510
1511 yield = string_cat(yield, &size, &ptr, US">", 1);
1512 }
1513
1514 yield[ptr] = 0; /* string_cat() leaves space */
1515 return yield;
1516 }
1517 #endif /* COMPILE_UTILITY */
1518
1519
1520
1521
1522
1523 /*************************************************
1524 **************************************************
1525 * Stand-alone test program *
1526 **************************************************
1527 *************************************************/
1528
1529 #ifdef STAND_ALONE
1530 int main(void)
1531 {
1532 uschar buffer[256];
1533
1534 printf("Testing is_ip_address\n");
1535
1536 while (fgets(CS buffer, sizeof(buffer), stdin) != NULL)
1537 {
1538 int offset;
1539 buffer[Ustrlen(buffer) - 1] = 0;
1540 printf("%d\n", string_is_ip_address(buffer, NULL));
1541 printf("%d %d %s\n", string_is_ip_address(buffer, &offset), offset, buffer);
1542 }
1543
1544 printf("Testing string_nextinlist\n");
1545
1546 while (fgets(CS buffer, sizeof(buffer), stdin) != NULL)
1547 {
1548 uschar *list = buffer;
1549 uschar *lp1, *lp2;
1550 uschar item[256];
1551 int sep1 = 0;
1552 int sep2 = 0;
1553
1554 if (*list == '<')
1555 {
1556 sep1 = sep2 = list[1];
1557 list += 2;
1558 }
1559
1560 lp1 = lp2 = list;
1561 for (;;)
1562 {
1563 uschar *item1 = string_nextinlist(&lp1, &sep1, item, sizeof(item));
1564 uschar *item2 = string_nextinlist(&lp2, &sep2, NULL, 0);
1565
1566 if (item1 == NULL && item2 == NULL) break;
1567 if (item == NULL || item2 == NULL || Ustrcmp(item1, item2) != 0)
1568 {
1569 printf("***ERROR\nitem1=\"%s\"\nitem2=\"%s\"\n",
1570 (item1 == NULL)? "NULL" : CS item1,
1571 (item2 == NULL)? "NULL" : CS item2);
1572 break;
1573 }
1574 else printf(" \"%s\"\n", CS item1);
1575 }
1576 }
1577
1578 /* This is a horrible lash-up, but it serves its purpose. */
1579
1580 printf("Testing string_format\n");
1581
1582 while (fgets(CS buffer, sizeof(buffer), stdin) != NULL)
1583 {
1584 void *args[3];
1585 long long llargs[3];
1586 double dargs[3];
1587 int dflag = 0;
1588 int llflag = 0;
1589 int n = 0;
1590 int count;
1591 int countset = 0;
1592 uschar format[256];
1593 uschar outbuf[256];
1594 uschar *s;
1595 buffer[Ustrlen(buffer) - 1] = 0;
1596
1597 s = Ustrchr(buffer, ',');
1598 if (s == NULL) s = buffer + Ustrlen(buffer);
1599
1600 Ustrncpy(format, buffer, s - buffer);
1601 format[s-buffer] = 0;
1602
1603 if (*s == ',') s++;
1604
1605 while (*s != 0)
1606 {
1607 uschar *ss = s;
1608 s = Ustrchr(ss, ',');
1609 if (s == NULL) s = ss + Ustrlen(ss);
1610
1611 if (isdigit(*ss))
1612 {
1613 Ustrncpy(outbuf, ss, s-ss);
1614 if (Ustrchr(outbuf, '.') != NULL)
1615 {
1616 dflag = 1;
1617 dargs[n++] = Ustrtod(outbuf, NULL);
1618 }
1619 else if (Ustrstr(outbuf, "ll") != NULL)
1620 {
1621 llflag = 1;
1622 llargs[n++] = strtoull(CS outbuf, NULL, 10);
1623 }
1624 else
1625 {
1626 args[n++] = (void *)Uatoi(outbuf);
1627 }
1628 }
1629
1630 else if (Ustrcmp(ss, "*") == 0)
1631 {
1632 args[n++] = (void *)(&count);
1633 countset = 1;
1634 }
1635
1636 else
1637 {
1638 uschar *sss = malloc(s - ss + 1);
1639 Ustrncpy(sss, ss, s-ss);
1640 args[n++] = sss;
1641 }
1642
1643 if (*s == ',') s++;
1644 }
1645
1646 if (!dflag && !llflag)
1647 printf("%s\n", string_format(outbuf, sizeof(outbuf), CS format,
1648 args[0], args[1], args[2])? "True" : "False");
1649
1650 else if (dflag)
1651 printf("%s\n", string_format(outbuf, sizeof(outbuf), CS format,
1652 dargs[0], dargs[1], dargs[2])? "True" : "False");
1653
1654 else printf("%s\n", string_format(outbuf, sizeof(outbuf), CS format,
1655 llargs[0], llargs[1], llargs[2])? "True" : "False");
1656
1657 printf("%s\n", CS outbuf);
1658 if (countset) printf("count=%d\n", count);
1659 }
1660
1661 return 0;
1662 }
1663 #endif
1664
1665 /* End of string.c */