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1.1 misho 1:
2: /*
3: * Copyright (C) Igor Sysoev
4: * Copyright (C) Nginx, Inc.
5: */
6:
7:
8: #include <ngx_config.h>
9: #include <ngx_core.h>
10:
11:
12: static u_char *ngx_sprintf_num(u_char *buf, u_char *last, uint64_t ui64,
13: u_char zero, ngx_uint_t hexadecimal, ngx_uint_t width);
14: static ngx_int_t ngx_decode_base64_internal(ngx_str_t *dst, ngx_str_t *src,
15: const u_char *basis);
16:
17:
18: void
19: ngx_strlow(u_char *dst, u_char *src, size_t n)
20: {
21: while (n) {
22: *dst = ngx_tolower(*src);
23: dst++;
24: src++;
25: n--;
26: }
27: }
28:
29:
30: u_char *
31: ngx_cpystrn(u_char *dst, u_char *src, size_t n)
32: {
33: if (n == 0) {
34: return dst;
35: }
36:
37: while (--n) {
38: *dst = *src;
39:
40: if (*dst == '\0') {
41: return dst;
42: }
43:
44: dst++;
45: src++;
46: }
47:
48: *dst = '\0';
49:
50: return dst;
51: }
52:
53:
54: u_char *
55: ngx_pstrdup(ngx_pool_t *pool, ngx_str_t *src)
56: {
57: u_char *dst;
58:
59: dst = ngx_pnalloc(pool, src->len);
60: if (dst == NULL) {
61: return NULL;
62: }
63:
64: ngx_memcpy(dst, src->data, src->len);
65:
66: return dst;
67: }
68:
69:
70: /*
71: * supported formats:
72: * %[0][width][x][X]O off_t
73: * %[0][width]T time_t
74: * %[0][width][u][x|X]z ssize_t/size_t
75: * %[0][width][u][x|X]d int/u_int
76: * %[0][width][u][x|X]l long
77: * %[0][width|m][u][x|X]i ngx_int_t/ngx_uint_t
78: * %[0][width][u][x|X]D int32_t/uint32_t
79: * %[0][width][u][x|X]L int64_t/uint64_t
80: * %[0][width|m][u][x|X]A ngx_atomic_int_t/ngx_atomic_uint_t
81: * %[0][width][.width]f double, max valid number fits to %18.15f
82: * %P ngx_pid_t
83: * %M ngx_msec_t
84: * %r rlim_t
85: * %p void *
86: * %V ngx_str_t *
87: * %v ngx_variable_value_t *
88: * %s null-terminated string
89: * %*s length and string
90: * %Z '\0'
91: * %N '\n'
92: * %c char
93: * %% %
94: *
95: * reserved:
96: * %t ptrdiff_t
97: * %S null-terminated wchar string
98: * %C wchar
99: */
100:
101:
102: u_char * ngx_cdecl
103: ngx_sprintf(u_char *buf, const char *fmt, ...)
104: {
105: u_char *p;
106: va_list args;
107:
108: va_start(args, fmt);
109: p = ngx_vslprintf(buf, (void *) -1, fmt, args);
110: va_end(args);
111:
112: return p;
113: }
114:
115:
116: u_char * ngx_cdecl
117: ngx_snprintf(u_char *buf, size_t max, const char *fmt, ...)
118: {
119: u_char *p;
120: va_list args;
121:
122: va_start(args, fmt);
123: p = ngx_vslprintf(buf, buf + max, fmt, args);
124: va_end(args);
125:
126: return p;
127: }
128:
129:
130: u_char * ngx_cdecl
131: ngx_slprintf(u_char *buf, u_char *last, const char *fmt, ...)
132: {
133: u_char *p;
134: va_list args;
135:
136: va_start(args, fmt);
137: p = ngx_vslprintf(buf, last, fmt, args);
138: va_end(args);
139:
140: return p;
141: }
142:
143:
144: u_char *
145: ngx_vslprintf(u_char *buf, u_char *last, const char *fmt, va_list args)
146: {
147: u_char *p, zero;
148: int d;
149: double f;
150: size_t len, slen;
151: int64_t i64;
152: uint64_t ui64, frac;
153: ngx_msec_t ms;
154: ngx_uint_t width, sign, hex, max_width, frac_width, scale, n;
155: ngx_str_t *v;
156: ngx_variable_value_t *vv;
157:
158: while (*fmt && buf < last) {
159:
160: /*
161: * "buf < last" means that we could copy at least one character:
162: * the plain character, "%%", "%c", and minus without the checking
163: */
164:
165: if (*fmt == '%') {
166:
167: i64 = 0;
168: ui64 = 0;
169:
170: zero = (u_char) ((*++fmt == '0') ? '0' : ' ');
171: width = 0;
172: sign = 1;
173: hex = 0;
174: max_width = 0;
175: frac_width = 0;
176: slen = (size_t) -1;
177:
178: while (*fmt >= '0' && *fmt <= '9') {
179: width = width * 10 + *fmt++ - '0';
180: }
181:
182:
183: for ( ;; ) {
184: switch (*fmt) {
185:
186: case 'u':
187: sign = 0;
188: fmt++;
189: continue;
190:
191: case 'm':
192: max_width = 1;
193: fmt++;
194: continue;
195:
196: case 'X':
197: hex = 2;
198: sign = 0;
199: fmt++;
200: continue;
201:
202: case 'x':
203: hex = 1;
204: sign = 0;
205: fmt++;
206: continue;
207:
208: case '.':
209: fmt++;
210:
211: while (*fmt >= '0' && *fmt <= '9') {
212: frac_width = frac_width * 10 + *fmt++ - '0';
213: }
214:
215: break;
216:
217: case '*':
218: slen = va_arg(args, size_t);
219: fmt++;
220: continue;
221:
222: default:
223: break;
224: }
225:
226: break;
227: }
228:
229:
230: switch (*fmt) {
231:
232: case 'V':
233: v = va_arg(args, ngx_str_t *);
234:
235: len = ngx_min(((size_t) (last - buf)), v->len);
236: buf = ngx_cpymem(buf, v->data, len);
237: fmt++;
238:
239: continue;
240:
241: case 'v':
242: vv = va_arg(args, ngx_variable_value_t *);
243:
244: len = ngx_min(((size_t) (last - buf)), vv->len);
245: buf = ngx_cpymem(buf, vv->data, len);
246: fmt++;
247:
248: continue;
249:
250: case 's':
251: p = va_arg(args, u_char *);
252:
253: if (slen == (size_t) -1) {
254: while (*p && buf < last) {
255: *buf++ = *p++;
256: }
257:
258: } else {
259: len = ngx_min(((size_t) (last - buf)), slen);
260: buf = ngx_cpymem(buf, p, len);
261: }
262:
263: fmt++;
264:
265: continue;
266:
267: case 'O':
268: i64 = (int64_t) va_arg(args, off_t);
269: sign = 1;
270: break;
271:
272: case 'P':
273: i64 = (int64_t) va_arg(args, ngx_pid_t);
274: sign = 1;
275: break;
276:
277: case 'T':
278: i64 = (int64_t) va_arg(args, time_t);
279: sign = 1;
280: break;
281:
282: case 'M':
283: ms = (ngx_msec_t) va_arg(args, ngx_msec_t);
284: if ((ngx_msec_int_t) ms == -1) {
285: sign = 1;
286: i64 = -1;
287: } else {
288: sign = 0;
289: ui64 = (uint64_t) ms;
290: }
291: break;
292:
293: case 'z':
294: if (sign) {
295: i64 = (int64_t) va_arg(args, ssize_t);
296: } else {
297: ui64 = (uint64_t) va_arg(args, size_t);
298: }
299: break;
300:
301: case 'i':
302: if (sign) {
303: i64 = (int64_t) va_arg(args, ngx_int_t);
304: } else {
305: ui64 = (uint64_t) va_arg(args, ngx_uint_t);
306: }
307:
308: if (max_width) {
309: width = NGX_INT_T_LEN;
310: }
311:
312: break;
313:
314: case 'd':
315: if (sign) {
316: i64 = (int64_t) va_arg(args, int);
317: } else {
318: ui64 = (uint64_t) va_arg(args, u_int);
319: }
320: break;
321:
322: case 'l':
323: if (sign) {
324: i64 = (int64_t) va_arg(args, long);
325: } else {
326: ui64 = (uint64_t) va_arg(args, u_long);
327: }
328: break;
329:
330: case 'D':
331: if (sign) {
332: i64 = (int64_t) va_arg(args, int32_t);
333: } else {
334: ui64 = (uint64_t) va_arg(args, uint32_t);
335: }
336: break;
337:
338: case 'L':
339: if (sign) {
340: i64 = va_arg(args, int64_t);
341: } else {
342: ui64 = va_arg(args, uint64_t);
343: }
344: break;
345:
346: case 'A':
347: if (sign) {
348: i64 = (int64_t) va_arg(args, ngx_atomic_int_t);
349: } else {
350: ui64 = (uint64_t) va_arg(args, ngx_atomic_uint_t);
351: }
352:
353: if (max_width) {
354: width = NGX_ATOMIC_T_LEN;
355: }
356:
357: break;
358:
359: case 'f':
360: f = va_arg(args, double);
361:
362: if (f < 0) {
363: *buf++ = '-';
364: f = -f;
365: }
366:
367: ui64 = (int64_t) f;
368: frac = 0;
369:
370: if (frac_width) {
371:
372: scale = 1;
373: for (n = frac_width; n; n--) {
374: scale *= 10;
375: }
376:
377: frac = (uint64_t) ((f - (double) ui64) * scale + 0.5);
378:
379: if (frac == scale) {
380: ui64++;
381: frac = 0;
382: }
383: }
384:
385: buf = ngx_sprintf_num(buf, last, ui64, zero, 0, width);
386:
387: if (frac_width) {
388: if (buf < last) {
389: *buf++ = '.';
390: }
391:
392: buf = ngx_sprintf_num(buf, last, frac, '0', 0, frac_width);
393: }
394:
395: fmt++;
396:
397: continue;
398:
399: #if !(NGX_WIN32)
400: case 'r':
401: i64 = (int64_t) va_arg(args, rlim_t);
402: sign = 1;
403: break;
404: #endif
405:
406: case 'p':
407: ui64 = (uintptr_t) va_arg(args, void *);
408: hex = 2;
409: sign = 0;
410: zero = '0';
411: width = NGX_PTR_SIZE * 2;
412: break;
413:
414: case 'c':
415: d = va_arg(args, int);
416: *buf++ = (u_char) (d & 0xff);
417: fmt++;
418:
419: continue;
420:
421: case 'Z':
422: *buf++ = '\0';
423: fmt++;
424:
425: continue;
426:
427: case 'N':
428: #if (NGX_WIN32)
429: *buf++ = CR;
430: #endif
431: *buf++ = LF;
432: fmt++;
433:
434: continue;
435:
436: case '%':
437: *buf++ = '%';
438: fmt++;
439:
440: continue;
441:
442: default:
443: *buf++ = *fmt++;
444:
445: continue;
446: }
447:
448: if (sign) {
449: if (i64 < 0) {
450: *buf++ = '-';
451: ui64 = (uint64_t) -i64;
452:
453: } else {
454: ui64 = (uint64_t) i64;
455: }
456: }
457:
458: buf = ngx_sprintf_num(buf, last, ui64, zero, hex, width);
459:
460: fmt++;
461:
462: } else {
463: *buf++ = *fmt++;
464: }
465: }
466:
467: return buf;
468: }
469:
470:
471: static u_char *
472: ngx_sprintf_num(u_char *buf, u_char *last, uint64_t ui64, u_char zero,
473: ngx_uint_t hexadecimal, ngx_uint_t width)
474: {
475: u_char *p, temp[NGX_INT64_LEN + 1];
476: /*
477: * we need temp[NGX_INT64_LEN] only,
478: * but icc issues the warning
479: */
480: size_t len;
481: uint32_t ui32;
482: static u_char hex[] = "0123456789abcdef";
483: static u_char HEX[] = "0123456789ABCDEF";
484:
485: p = temp + NGX_INT64_LEN;
486:
487: if (hexadecimal == 0) {
488:
489: if (ui64 <= NGX_MAX_UINT32_VALUE) {
490:
491: /*
492: * To divide 64-bit numbers and to find remainders
493: * on the x86 platform gcc and icc call the libc functions
494: * [u]divdi3() and [u]moddi3(), they call another function
495: * in its turn. On FreeBSD it is the qdivrem() function,
496: * its source code is about 170 lines of the code.
497: * The glibc counterpart is about 150 lines of the code.
498: *
499: * For 32-bit numbers and some divisors gcc and icc use
500: * a inlined multiplication and shifts. For example,
501: * unsigned "i32 / 10" is compiled to
502: *
503: * (i32 * 0xCCCCCCCD) >> 35
504: */
505:
506: ui32 = (uint32_t) ui64;
507:
508: do {
509: *--p = (u_char) (ui32 % 10 + '0');
510: } while (ui32 /= 10);
511:
512: } else {
513: do {
514: *--p = (u_char) (ui64 % 10 + '0');
515: } while (ui64 /= 10);
516: }
517:
518: } else if (hexadecimal == 1) {
519:
520: do {
521:
522: /* the "(uint32_t)" cast disables the BCC's warning */
523: *--p = hex[(uint32_t) (ui64 & 0xf)];
524:
525: } while (ui64 >>= 4);
526:
527: } else { /* hexadecimal == 2 */
528:
529: do {
530:
531: /* the "(uint32_t)" cast disables the BCC's warning */
532: *--p = HEX[(uint32_t) (ui64 & 0xf)];
533:
534: } while (ui64 >>= 4);
535: }
536:
537: /* zero or space padding */
538:
539: len = (temp + NGX_INT64_LEN) - p;
540:
541: while (len++ < width && buf < last) {
542: *buf++ = zero;
543: }
544:
545: /* number safe copy */
546:
547: len = (temp + NGX_INT64_LEN) - p;
548:
549: if (buf + len > last) {
550: len = last - buf;
551: }
552:
553: return ngx_cpymem(buf, p, len);
554: }
555:
556:
557: /*
558: * We use ngx_strcasecmp()/ngx_strncasecmp() for 7-bit ASCII strings only,
559: * and implement our own ngx_strcasecmp()/ngx_strncasecmp()
560: * to avoid libc locale overhead. Besides, we use the ngx_uint_t's
561: * instead of the u_char's, because they are slightly faster.
562: */
563:
564: ngx_int_t
565: ngx_strcasecmp(u_char *s1, u_char *s2)
566: {
567: ngx_uint_t c1, c2;
568:
569: for ( ;; ) {
570: c1 = (ngx_uint_t) *s1++;
571: c2 = (ngx_uint_t) *s2++;
572:
573: c1 = (c1 >= 'A' && c1 <= 'Z') ? (c1 | 0x20) : c1;
574: c2 = (c2 >= 'A' && c2 <= 'Z') ? (c2 | 0x20) : c2;
575:
576: if (c1 == c2) {
577:
578: if (c1) {
579: continue;
580: }
581:
582: return 0;
583: }
584:
585: return c1 - c2;
586: }
587: }
588:
589:
590: ngx_int_t
591: ngx_strncasecmp(u_char *s1, u_char *s2, size_t n)
592: {
593: ngx_uint_t c1, c2;
594:
595: while (n) {
596: c1 = (ngx_uint_t) *s1++;
597: c2 = (ngx_uint_t) *s2++;
598:
599: c1 = (c1 >= 'A' && c1 <= 'Z') ? (c1 | 0x20) : c1;
600: c2 = (c2 >= 'A' && c2 <= 'Z') ? (c2 | 0x20) : c2;
601:
602: if (c1 == c2) {
603:
604: if (c1) {
605: n--;
606: continue;
607: }
608:
609: return 0;
610: }
611:
612: return c1 - c2;
613: }
614:
615: return 0;
616: }
617:
618:
619: u_char *
620: ngx_strnstr(u_char *s1, char *s2, size_t len)
621: {
622: u_char c1, c2;
623: size_t n;
624:
625: c2 = *(u_char *) s2++;
626:
627: n = ngx_strlen(s2);
628:
629: do {
630: do {
631: if (len-- == 0) {
632: return NULL;
633: }
634:
635: c1 = *s1++;
636:
637: if (c1 == 0) {
638: return NULL;
639: }
640:
641: } while (c1 != c2);
642:
643: if (n > len) {
644: return NULL;
645: }
646:
647: } while (ngx_strncmp(s1, (u_char *) s2, n) != 0);
648:
649: return --s1;
650: }
651:
652:
653: /*
654: * ngx_strstrn() and ngx_strcasestrn() are intended to search for static
655: * substring with known length in null-terminated string. The argument n
656: * must be length of the second substring - 1.
657: */
658:
659: u_char *
660: ngx_strstrn(u_char *s1, char *s2, size_t n)
661: {
662: u_char c1, c2;
663:
664: c2 = *(u_char *) s2++;
665:
666: do {
667: do {
668: c1 = *s1++;
669:
670: if (c1 == 0) {
671: return NULL;
672: }
673:
674: } while (c1 != c2);
675:
676: } while (ngx_strncmp(s1, (u_char *) s2, n) != 0);
677:
678: return --s1;
679: }
680:
681:
682: u_char *
683: ngx_strcasestrn(u_char *s1, char *s2, size_t n)
684: {
685: ngx_uint_t c1, c2;
686:
687: c2 = (ngx_uint_t) *s2++;
688: c2 = (c2 >= 'A' && c2 <= 'Z') ? (c2 | 0x20) : c2;
689:
690: do {
691: do {
692: c1 = (ngx_uint_t) *s1++;
693:
694: if (c1 == 0) {
695: return NULL;
696: }
697:
698: c1 = (c1 >= 'A' && c1 <= 'Z') ? (c1 | 0x20) : c1;
699:
700: } while (c1 != c2);
701:
702: } while (ngx_strncasecmp(s1, (u_char *) s2, n) != 0);
703:
704: return --s1;
705: }
706:
707:
708: /*
709: * ngx_strlcasestrn() is intended to search for static substring
710: * with known length in string until the argument last. The argument n
711: * must be length of the second substring - 1.
712: */
713:
714: u_char *
715: ngx_strlcasestrn(u_char *s1, u_char *last, u_char *s2, size_t n)
716: {
717: ngx_uint_t c1, c2;
718:
719: c2 = (ngx_uint_t) *s2++;
720: c2 = (c2 >= 'A' && c2 <= 'Z') ? (c2 | 0x20) : c2;
721: last -= n;
722:
723: do {
724: do {
725: if (s1 >= last) {
726: return NULL;
727: }
728:
729: c1 = (ngx_uint_t) *s1++;
730:
731: c1 = (c1 >= 'A' && c1 <= 'Z') ? (c1 | 0x20) : c1;
732:
733: } while (c1 != c2);
734:
735: } while (ngx_strncasecmp(s1, s2, n) != 0);
736:
737: return --s1;
738: }
739:
740:
741: ngx_int_t
742: ngx_rstrncmp(u_char *s1, u_char *s2, size_t n)
743: {
744: if (n == 0) {
745: return 0;
746: }
747:
748: n--;
749:
750: for ( ;; ) {
751: if (s1[n] != s2[n]) {
752: return s1[n] - s2[n];
753: }
754:
755: if (n == 0) {
756: return 0;
757: }
758:
759: n--;
760: }
761: }
762:
763:
764: ngx_int_t
765: ngx_rstrncasecmp(u_char *s1, u_char *s2, size_t n)
766: {
767: u_char c1, c2;
768:
769: if (n == 0) {
770: return 0;
771: }
772:
773: n--;
774:
775: for ( ;; ) {
776: c1 = s1[n];
777: if (c1 >= 'a' && c1 <= 'z') {
778: c1 -= 'a' - 'A';
779: }
780:
781: c2 = s2[n];
782: if (c2 >= 'a' && c2 <= 'z') {
783: c2 -= 'a' - 'A';
784: }
785:
786: if (c1 != c2) {
787: return c1 - c2;
788: }
789:
790: if (n == 0) {
791: return 0;
792: }
793:
794: n--;
795: }
796: }
797:
798:
799: ngx_int_t
800: ngx_memn2cmp(u_char *s1, u_char *s2, size_t n1, size_t n2)
801: {
802: size_t n;
803: ngx_int_t m, z;
804:
805: if (n1 <= n2) {
806: n = n1;
807: z = -1;
808:
809: } else {
810: n = n2;
811: z = 1;
812: }
813:
814: m = ngx_memcmp(s1, s2, n);
815:
816: if (m || n1 == n2) {
817: return m;
818: }
819:
820: return z;
821: }
822:
823:
824: ngx_int_t
825: ngx_dns_strcmp(u_char *s1, u_char *s2)
826: {
827: ngx_uint_t c1, c2;
828:
829: for ( ;; ) {
830: c1 = (ngx_uint_t) *s1++;
831: c2 = (ngx_uint_t) *s2++;
832:
833: c1 = (c1 >= 'A' && c1 <= 'Z') ? (c1 | 0x20) : c1;
834: c2 = (c2 >= 'A' && c2 <= 'Z') ? (c2 | 0x20) : c2;
835:
836: if (c1 == c2) {
837:
838: if (c1) {
839: continue;
840: }
841:
842: return 0;
843: }
844:
845: /* in ASCII '.' > '-', but we need '.' to be the lowest character */
846:
847: c1 = (c1 == '.') ? ' ' : c1;
848: c2 = (c2 == '.') ? ' ' : c2;
849:
850: return c1 - c2;
851: }
852: }
853:
854:
855: ngx_int_t
856: ngx_atoi(u_char *line, size_t n)
857: {
858: ngx_int_t value;
859:
860: if (n == 0) {
861: return NGX_ERROR;
862: }
863:
864: for (value = 0; n--; line++) {
865: if (*line < '0' || *line > '9') {
866: return NGX_ERROR;
867: }
868:
869: value = value * 10 + (*line - '0');
870: }
871:
872: if (value < 0) {
873: return NGX_ERROR;
874:
875: } else {
876: return value;
877: }
878: }
879:
880:
881: /* parse a fixed point number, e.g., ngx_atofp("10.5", 4, 2) returns 1050 */
882:
883: ngx_int_t
884: ngx_atofp(u_char *line, size_t n, size_t point)
885: {
886: ngx_int_t value;
887: ngx_uint_t dot;
888:
889: if (n == 0) {
890: return NGX_ERROR;
891: }
892:
893: dot = 0;
894:
895: for (value = 0; n--; line++) {
896:
897: if (point == 0) {
898: return NGX_ERROR;
899: }
900:
901: if (*line == '.') {
902: if (dot) {
903: return NGX_ERROR;
904: }
905:
906: dot = 1;
907: continue;
908: }
909:
910: if (*line < '0' || *line > '9') {
911: return NGX_ERROR;
912: }
913:
914: value = value * 10 + (*line - '0');
915: point -= dot;
916: }
917:
918: while (point--) {
919: value = value * 10;
920: }
921:
922: if (value < 0) {
923: return NGX_ERROR;
924:
925: } else {
926: return value;
927: }
928: }
929:
930:
931: ssize_t
932: ngx_atosz(u_char *line, size_t n)
933: {
934: ssize_t value;
935:
936: if (n == 0) {
937: return NGX_ERROR;
938: }
939:
940: for (value = 0; n--; line++) {
941: if (*line < '0' || *line > '9') {
942: return NGX_ERROR;
943: }
944:
945: value = value * 10 + (*line - '0');
946: }
947:
948: if (value < 0) {
949: return NGX_ERROR;
950:
951: } else {
952: return value;
953: }
954: }
955:
956:
957: off_t
958: ngx_atoof(u_char *line, size_t n)
959: {
960: off_t value;
961:
962: if (n == 0) {
963: return NGX_ERROR;
964: }
965:
966: for (value = 0; n--; line++) {
967: if (*line < '0' || *line > '9') {
968: return NGX_ERROR;
969: }
970:
971: value = value * 10 + (*line - '0');
972: }
973:
974: if (value < 0) {
975: return NGX_ERROR;
976:
977: } else {
978: return value;
979: }
980: }
981:
982:
983: time_t
984: ngx_atotm(u_char *line, size_t n)
985: {
986: time_t value;
987:
988: if (n == 0) {
989: return NGX_ERROR;
990: }
991:
992: for (value = 0; n--; line++) {
993: if (*line < '0' || *line > '9') {
994: return NGX_ERROR;
995: }
996:
997: value = value * 10 + (*line - '0');
998: }
999:
1000: if (value < 0) {
1001: return NGX_ERROR;
1002:
1003: } else {
1004: return value;
1005: }
1006: }
1007:
1008:
1009: ngx_int_t
1010: ngx_hextoi(u_char *line, size_t n)
1011: {
1012: u_char c, ch;
1013: ngx_int_t value;
1014:
1015: if (n == 0) {
1016: return NGX_ERROR;
1017: }
1018:
1019: for (value = 0; n--; line++) {
1020: ch = *line;
1021:
1022: if (ch >= '0' && ch <= '9') {
1023: value = value * 16 + (ch - '0');
1024: continue;
1025: }
1026:
1027: c = (u_char) (ch | 0x20);
1028:
1029: if (c >= 'a' && c <= 'f') {
1030: value = value * 16 + (c - 'a' + 10);
1031: continue;
1032: }
1033:
1034: return NGX_ERROR;
1035: }
1036:
1037: if (value < 0) {
1038: return NGX_ERROR;
1039:
1040: } else {
1041: return value;
1042: }
1043: }
1044:
1045:
1046: u_char *
1047: ngx_hex_dump(u_char *dst, u_char *src, size_t len)
1048: {
1049: static u_char hex[] = "0123456789abcdef";
1050:
1051: while (len--) {
1052: *dst++ = hex[*src >> 4];
1053: *dst++ = hex[*src++ & 0xf];
1054: }
1055:
1056: return dst;
1057: }
1058:
1059:
1060: void
1061: ngx_encode_base64(ngx_str_t *dst, ngx_str_t *src)
1062: {
1063: u_char *d, *s;
1064: size_t len;
1065: static u_char basis64[] =
1066: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
1067:
1068: len = src->len;
1069: s = src->data;
1070: d = dst->data;
1071:
1072: while (len > 2) {
1073: *d++ = basis64[(s[0] >> 2) & 0x3f];
1074: *d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
1075: *d++ = basis64[((s[1] & 0x0f) << 2) | (s[2] >> 6)];
1076: *d++ = basis64[s[2] & 0x3f];
1077:
1078: s += 3;
1079: len -= 3;
1080: }
1081:
1082: if (len) {
1083: *d++ = basis64[(s[0] >> 2) & 0x3f];
1084:
1085: if (len == 1) {
1086: *d++ = basis64[(s[0] & 3) << 4];
1087: *d++ = '=';
1088:
1089: } else {
1090: *d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
1091: *d++ = basis64[(s[1] & 0x0f) << 2];
1092: }
1093:
1094: *d++ = '=';
1095: }
1096:
1097: dst->len = d - dst->data;
1098: }
1099:
1100:
1101: ngx_int_t
1102: ngx_decode_base64(ngx_str_t *dst, ngx_str_t *src)
1103: {
1104: static u_char basis64[] = {
1105: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1106: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1107: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 62, 77, 77, 77, 63,
1108: 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 77, 77, 77, 77, 77, 77,
1109: 77, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
1110: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 77, 77, 77, 77, 77,
1111: 77, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
1112: 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 77, 77, 77, 77, 77,
1113:
1114: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1115: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1116: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1117: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1118: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1119: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1120: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1121: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77
1122: };
1123:
1124: return ngx_decode_base64_internal(dst, src, basis64);
1125: }
1126:
1127:
1128: ngx_int_t
1129: ngx_decode_base64url(ngx_str_t *dst, ngx_str_t *src)
1130: {
1131: static u_char basis64[] = {
1132: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1133: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1134: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 62, 77, 77,
1135: 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 77, 77, 77, 77, 77, 77,
1136: 77, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
1137: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 77, 77, 77, 77, 63,
1138: 77, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
1139: 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 77, 77, 77, 77, 77,
1140:
1141: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1142: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1143: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1144: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1145: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1146: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1147: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
1148: 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77
1149: };
1150:
1151: return ngx_decode_base64_internal(dst, src, basis64);
1152: }
1153:
1154:
1155: static ngx_int_t
1156: ngx_decode_base64_internal(ngx_str_t *dst, ngx_str_t *src, const u_char *basis)
1157: {
1158: size_t len;
1159: u_char *d, *s;
1160:
1161: for (len = 0; len < src->len; len++) {
1162: if (src->data[len] == '=') {
1163: break;
1164: }
1165:
1166: if (basis[src->data[len]] == 77) {
1167: return NGX_ERROR;
1168: }
1169: }
1170:
1171: if (len % 4 == 1) {
1172: return NGX_ERROR;
1173: }
1174:
1175: s = src->data;
1176: d = dst->data;
1177:
1178: while (len > 3) {
1179: *d++ = (u_char) (basis[s[0]] << 2 | basis[s[1]] >> 4);
1180: *d++ = (u_char) (basis[s[1]] << 4 | basis[s[2]] >> 2);
1181: *d++ = (u_char) (basis[s[2]] << 6 | basis[s[3]]);
1182:
1183: s += 4;
1184: len -= 4;
1185: }
1186:
1187: if (len > 1) {
1188: *d++ = (u_char) (basis[s[0]] << 2 | basis[s[1]] >> 4);
1189: }
1190:
1191: if (len > 2) {
1192: *d++ = (u_char) (basis[s[1]] << 4 | basis[s[2]] >> 2);
1193: }
1194:
1195: dst->len = d - dst->data;
1196:
1197: return NGX_OK;
1198: }
1199:
1200:
1201: /*
1202: * ngx_utf8_decode() decodes two and more bytes UTF sequences only
1203: * the return values:
1204: * 0x80 - 0x10ffff valid character
1205: * 0x110000 - 0xfffffffd invalid sequence
1206: * 0xfffffffe incomplete sequence
1207: * 0xffffffff error
1208: */
1209:
1210: uint32_t
1211: ngx_utf8_decode(u_char **p, size_t n)
1212: {
1213: size_t len;
1214: uint32_t u, i, valid;
1215:
1216: u = **p;
1217:
1218: if (u >= 0xf0) {
1219:
1220: u &= 0x07;
1221: valid = 0xffff;
1222: len = 3;
1223:
1224: } else if (u >= 0xe0) {
1225:
1226: u &= 0x0f;
1227: valid = 0x7ff;
1228: len = 2;
1229:
1230: } else if (u >= 0xc2) {
1231:
1232: u &= 0x1f;
1233: valid = 0x7f;
1234: len = 1;
1235:
1236: } else {
1237: (*p)++;
1238: return 0xffffffff;
1239: }
1240:
1241: if (n - 1 < len) {
1242: return 0xfffffffe;
1243: }
1244:
1245: (*p)++;
1246:
1247: while (len) {
1248: i = *(*p)++;
1249:
1250: if (i < 0x80) {
1251: return 0xffffffff;
1252: }
1253:
1254: u = (u << 6) | (i & 0x3f);
1255:
1256: len--;
1257: }
1258:
1259: if (u > valid) {
1260: return u;
1261: }
1262:
1263: return 0xffffffff;
1264: }
1265:
1266:
1267: size_t
1268: ngx_utf8_length(u_char *p, size_t n)
1269: {
1270: u_char c, *last;
1271: size_t len;
1272:
1273: last = p + n;
1274:
1275: for (len = 0; p < last; len++) {
1276:
1277: c = *p;
1278:
1279: if (c < 0x80) {
1280: p++;
1281: continue;
1282: }
1283:
1284: if (ngx_utf8_decode(&p, n) > 0x10ffff) {
1285: /* invalid UTF-8 */
1286: return n;
1287: }
1288: }
1289:
1290: return len;
1291: }
1292:
1293:
1294: u_char *
1295: ngx_utf8_cpystrn(u_char *dst, u_char *src, size_t n, size_t len)
1296: {
1297: u_char c, *next;
1298:
1299: if (n == 0) {
1300: return dst;
1301: }
1302:
1303: while (--n) {
1304:
1305: c = *src;
1306: *dst = c;
1307:
1308: if (c < 0x80) {
1309:
1310: if (c != '\0') {
1311: dst++;
1312: src++;
1313: len--;
1314:
1315: continue;
1316: }
1317:
1318: return dst;
1319: }
1320:
1321: next = src;
1322:
1323: if (ngx_utf8_decode(&next, len) > 0x10ffff) {
1324: /* invalid UTF-8 */
1325: break;
1326: }
1327:
1328: while (src < next) {
1329: *dst++ = *src++;
1330: len--;
1331: }
1332: }
1333:
1334: *dst = '\0';
1335:
1336: return dst;
1337: }
1338:
1339:
1340: uintptr_t
1341: ngx_escape_uri(u_char *dst, u_char *src, size_t size, ngx_uint_t type)
1342: {
1343: ngx_uint_t n;
1344: uint32_t *escape;
1345: static u_char hex[] = "0123456789abcdef";
1346:
1347: /* " ", "#", "%", "?", %00-%1F, %7F-%FF */
1348:
1349: static uint32_t uri[] = {
1350: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1351:
1352: /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
1353: 0x80000029, /* 1000 0000 0000 0000 0000 0000 0010 1001 */
1354:
1355: /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
1356: 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
1357:
1358: /* ~}| {zyx wvut srqp onml kjih gfed cba` */
1359: 0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
1360:
1361: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1362: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1363: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1364: 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1365: };
1366:
1367: /* " ", "#", "%", "&", "+", "?", %00-%1F, %7F-%FF */
1368:
1369: static uint32_t args[] = {
1370: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1371:
1372: /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
1373: 0x88000869, /* 1000 1000 0000 0000 0000 1000 0110 1001 */
1374:
1375: /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
1376: 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
1377:
1378: /* ~}| {zyx wvut srqp onml kjih gfed cba` */
1379: 0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
1380:
1381: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1382: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1383: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1384: 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1385: };
1386:
1387: /* not ALPHA, DIGIT, "-", ".", "_", "~" */
1388:
1389: static uint32_t uri_component[] = {
1390: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1391:
1392: /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
1393: 0xfc009fff, /* 1111 1100 0000 0000 1001 1111 1111 1111 */
1394:
1395: /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
1396: 0x78000001, /* 0111 1000 0000 0000 0000 0000 0000 0001 */
1397:
1398: /* ~}| {zyx wvut srqp onml kjih gfed cba` */
1399: 0xb8000001, /* 1011 1000 0000 0000 0000 0000 0000 0001 */
1400:
1401: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1402: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1403: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1404: 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1405: };
1406:
1407: /* " ", "#", """, "%", "'", %00-%1F, %7F-%FF */
1408:
1409: static uint32_t html[] = {
1410: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1411:
1412: /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
1413: 0x000000ad, /* 0000 0000 0000 0000 0000 0000 1010 1101 */
1414:
1415: /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
1416: 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
1417:
1418: /* ~}| {zyx wvut srqp onml kjih gfed cba` */
1419: 0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
1420:
1421: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1422: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1423: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1424: 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1425: };
1426:
1427: /* " ", """, "%", "'", %00-%1F, %7F-%FF */
1428:
1429: static uint32_t refresh[] = {
1430: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1431:
1432: /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
1433: 0x00000085, /* 0000 0000 0000 0000 0000 0000 1000 0101 */
1434:
1435: /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
1436: 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
1437:
1438: /* ~}| {zyx wvut srqp onml kjih gfed cba` */
1439: 0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
1440:
1441: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1442: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1443: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1444: 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1445: };
1446:
1447: /* " ", "%", %00-%1F */
1448:
1449: static uint32_t memcached[] = {
1450: 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
1451:
1452: /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
1453: 0x00000021, /* 0000 0000 0000 0000 0000 0000 0010 0001 */
1454:
1455: /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
1456: 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
1457:
1458: /* ~}| {zyx wvut srqp onml kjih gfed cba` */
1459: 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
1460:
1461: 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
1462: 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
1463: 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
1464: 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
1465: };
1466:
1467: /* mail_auth is the same as memcached */
1468:
1469: static uint32_t *map[] =
1470: { uri, args, uri_component, html, refresh, memcached, memcached };
1471:
1472:
1473: escape = map[type];
1474:
1475: if (dst == NULL) {
1476:
1477: /* find the number of the characters to be escaped */
1478:
1479: n = 0;
1480:
1481: while (size) {
1482: if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
1483: n++;
1484: }
1485: src++;
1486: size--;
1487: }
1488:
1489: return (uintptr_t) n;
1490: }
1491:
1492: while (size) {
1493: if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
1494: *dst++ = '%';
1495: *dst++ = hex[*src >> 4];
1496: *dst++ = hex[*src & 0xf];
1497: src++;
1498:
1499: } else {
1500: *dst++ = *src++;
1501: }
1502: size--;
1503: }
1504:
1505: return (uintptr_t) dst;
1506: }
1507:
1508:
1509: void
1510: ngx_unescape_uri(u_char **dst, u_char **src, size_t size, ngx_uint_t type)
1511: {
1512: u_char *d, *s, ch, c, decoded;
1513: enum {
1514: sw_usual = 0,
1515: sw_quoted,
1516: sw_quoted_second
1517: } state;
1518:
1519: d = *dst;
1520: s = *src;
1521:
1522: state = 0;
1523: decoded = 0;
1524:
1525: while (size--) {
1526:
1527: ch = *s++;
1528:
1529: switch (state) {
1530: case sw_usual:
1531: if (ch == '?'
1532: && (type & (NGX_UNESCAPE_URI|NGX_UNESCAPE_REDIRECT)))
1533: {
1534: *d++ = ch;
1535: goto done;
1536: }
1537:
1538: if (ch == '%') {
1539: state = sw_quoted;
1540: break;
1541: }
1542:
1543: *d++ = ch;
1544: break;
1545:
1546: case sw_quoted:
1547:
1548: if (ch >= '0' && ch <= '9') {
1549: decoded = (u_char) (ch - '0');
1550: state = sw_quoted_second;
1551: break;
1552: }
1553:
1554: c = (u_char) (ch | 0x20);
1555: if (c >= 'a' && c <= 'f') {
1556: decoded = (u_char) (c - 'a' + 10);
1557: state = sw_quoted_second;
1558: break;
1559: }
1560:
1561: /* the invalid quoted character */
1562:
1563: state = sw_usual;
1564:
1565: *d++ = ch;
1566:
1567: break;
1568:
1569: case sw_quoted_second:
1570:
1571: state = sw_usual;
1572:
1573: if (ch >= '0' && ch <= '9') {
1574: ch = (u_char) ((decoded << 4) + ch - '0');
1575:
1576: if (type & NGX_UNESCAPE_REDIRECT) {
1577: if (ch > '%' && ch < 0x7f) {
1578: *d++ = ch;
1579: break;
1580: }
1581:
1582: *d++ = '%'; *d++ = *(s - 2); *d++ = *(s - 1);
1583:
1584: break;
1585: }
1586:
1587: *d++ = ch;
1588:
1589: break;
1590: }
1591:
1592: c = (u_char) (ch | 0x20);
1593: if (c >= 'a' && c <= 'f') {
1594: ch = (u_char) ((decoded << 4) + c - 'a' + 10);
1595:
1596: if (type & NGX_UNESCAPE_URI) {
1597: if (ch == '?') {
1598: *d++ = ch;
1599: goto done;
1600: }
1601:
1602: *d++ = ch;
1603: break;
1604: }
1605:
1606: if (type & NGX_UNESCAPE_REDIRECT) {
1607: if (ch == '?') {
1608: *d++ = ch;
1609: goto done;
1610: }
1611:
1612: if (ch > '%' && ch < 0x7f) {
1613: *d++ = ch;
1614: break;
1615: }
1616:
1617: *d++ = '%'; *d++ = *(s - 2); *d++ = *(s - 1);
1618: break;
1619: }
1620:
1621: *d++ = ch;
1622:
1623: break;
1624: }
1625:
1626: /* the invalid quoted character */
1627:
1628: break;
1629: }
1630: }
1631:
1632: done:
1633:
1634: *dst = d;
1635: *src = s;
1636: }
1637:
1638:
1639: uintptr_t
1640: ngx_escape_html(u_char *dst, u_char *src, size_t size)
1641: {
1642: u_char ch;
1643: ngx_uint_t len;
1644:
1645: if (dst == NULL) {
1646:
1647: len = 0;
1648:
1649: while (size) {
1650: switch (*src++) {
1651:
1652: case '<':
1653: len += sizeof("<") - 2;
1654: break;
1655:
1656: case '>':
1657: len += sizeof(">") - 2;
1658: break;
1659:
1660: case '&':
1661: len += sizeof("&") - 2;
1662: break;
1663:
1664: case '"':
1665: len += sizeof(""") - 2;
1666: break;
1667:
1668: default:
1669: break;
1670: }
1671: size--;
1672: }
1673:
1674: return (uintptr_t) len;
1675: }
1676:
1677: while (size) {
1678: ch = *src++;
1679:
1680: switch (ch) {
1681:
1682: case '<':
1683: *dst++ = '&'; *dst++ = 'l'; *dst++ = 't'; *dst++ = ';';
1684: break;
1685:
1686: case '>':
1687: *dst++ = '&'; *dst++ = 'g'; *dst++ = 't'; *dst++ = ';';
1688: break;
1689:
1690: case '&':
1691: *dst++ = '&'; *dst++ = 'a'; *dst++ = 'm'; *dst++ = 'p';
1692: *dst++ = ';';
1693: break;
1694:
1695: case '"':
1696: *dst++ = '&'; *dst++ = 'q'; *dst++ = 'u'; *dst++ = 'o';
1697: *dst++ = 't'; *dst++ = ';';
1698: break;
1699:
1700: default:
1701: *dst++ = ch;
1702: break;
1703: }
1704: size--;
1705: }
1706:
1707: return (uintptr_t) dst;
1708: }
1709:
1710:
1711: void
1712: ngx_str_rbtree_insert_value(ngx_rbtree_node_t *temp,
1713: ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
1714: {
1715: ngx_str_node_t *n, *t;
1716: ngx_rbtree_node_t **p;
1717:
1718: for ( ;; ) {
1719:
1720: n = (ngx_str_node_t *) node;
1721: t = (ngx_str_node_t *) temp;
1722:
1723: if (node->key != temp->key) {
1724:
1725: p = (node->key < temp->key) ? &temp->left : &temp->right;
1726:
1727: } else if (n->str.len != t->str.len) {
1728:
1729: p = (n->str.len < t->str.len) ? &temp->left : &temp->right;
1730:
1731: } else {
1732: p = (ngx_memcmp(n->str.data, t->str.data, n->str.len) < 0)
1733: ? &temp->left : &temp->right;
1734: }
1735:
1736: if (*p == sentinel) {
1737: break;
1738: }
1739:
1740: temp = *p;
1741: }
1742:
1743: *p = node;
1744: node->parent = temp;
1745: node->left = sentinel;
1746: node->right = sentinel;
1747: ngx_rbt_red(node);
1748: }
1749:
1750:
1751: ngx_str_node_t *
1752: ngx_str_rbtree_lookup(ngx_rbtree_t *rbtree, ngx_str_t *val, uint32_t hash)
1753: {
1754: ngx_int_t rc;
1755: ngx_str_node_t *n;
1756: ngx_rbtree_node_t *node, *sentinel;
1757:
1758: node = rbtree->root;
1759: sentinel = rbtree->sentinel;
1760:
1761: while (node != sentinel) {
1762:
1763: n = (ngx_str_node_t *) node;
1764:
1765: if (hash != node->key) {
1766: node = (hash < node->key) ? node->left : node->right;
1767: continue;
1768: }
1769:
1770: if (val->len != n->str.len) {
1771: node = (val->len < n->str.len) ? node->left : node->right;
1772: continue;
1773: }
1774:
1775: rc = ngx_memcmp(val->data, n->str.data, val->len);
1776:
1777: if (rc < 0) {
1778: node = node->left;
1779: continue;
1780: }
1781:
1782: if (rc > 0) {
1783: node = node->right;
1784: continue;
1785: }
1786:
1787: return n;
1788: }
1789:
1790: return NULL;
1791: }
1792:
1793:
1794: /* ngx_sort() is implemented as insertion sort because we need stable sort */
1795:
1796: void
1797: ngx_sort(void *base, size_t n, size_t size,
1798: ngx_int_t (*cmp)(const void *, const void *))
1799: {
1800: u_char *p1, *p2, *p;
1801:
1802: p = ngx_alloc(size, ngx_cycle->log);
1803: if (p == NULL) {
1804: return;
1805: }
1806:
1807: for (p1 = (u_char *) base + size;
1808: p1 < (u_char *) base + n * size;
1809: p1 += size)
1810: {
1811: ngx_memcpy(p, p1, size);
1812:
1813: for (p2 = p1;
1814: p2 > (u_char *) base && cmp(p2 - size, p) > 0;
1815: p2 -= size)
1816: {
1817: ngx_memcpy(p2, p2 - size, size);
1818: }
1819:
1820: ngx_memcpy(p2, p, size);
1821: }
1822:
1823: ngx_free(p);
1824: }
1825:
1826:
1827: #if (NGX_MEMCPY_LIMIT)
1828:
1829: void *
1830: ngx_memcpy(void *dst, const void *src, size_t n)
1831: {
1832: if (n > NGX_MEMCPY_LIMIT) {
1833: ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, "memcpy %uz bytes", n);
1834: ngx_debug_point();
1835: }
1836:
1837: return memcpy(dst, src, n);
1838: }
1839:
1840: #endif