1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2018 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Author: |
16 +----------------------------------------------------------------------+
17 */
18
19 /* $Id$ */
20
21 #define _GNU_SOURCE
22 #include "php.h"
23
24 #include <zend_strtod.h>
25
26 #include <stddef.h>
27 #include <stdio.h>
28 #include <ctype.h>
29 #include <sys/types.h>
30 #include <stdarg.h>
31 #include <string.h>
32 #include <stdlib.h>
33 #include <math.h>
34
35 #ifdef HAVE_INTTYPES_H
36 #include <inttypes.h>
37 #endif
38
39 #ifdef HAVE_LOCALE_H
40 #include <locale.h>
41 #ifdef ZTS
42 #include "ext/standard/php_string.h"
43 #define LCONV_DECIMAL_POINT (*lconv.decimal_point)
44 #else
45 #define LCONV_DECIMAL_POINT (*lconv->decimal_point)
46 #endif
47 #else
48 #define LCONV_DECIMAL_POINT '.'
49 #endif
50
51 /*
52 * Copyright (c) 2002, 2006 Todd C. Miller <Todd.Miller@courtesan.com>
53 *
54 * Permission to use, copy, modify, and distribute this software for any
55 * purpose with or without fee is hereby granted, provided that the above
56 * copyright notice and this permission notice appear in all copies.
57 *
58 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
59 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
60 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
61 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
62 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
63 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
64 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
65 *
66 * Sponsored in part by the Defense Advanced Research Projects
67 * Agency (DARPA) and Air Force Research Laboratory, Air Force
68 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
69 */
70
__cvt(double value,int ndigit,int * decpt,int * sign,int fmode,int pad)71 static char * __cvt(double value, int ndigit, int *decpt, int *sign, int fmode, int pad) /* {{{ */
72 {
73 register char *s = NULL;
74 char *p, *rve, c;
75 size_t siz;
76
77 if (ndigit < 0) {
78 siz = -ndigit + 1;
79 } else {
80 siz = ndigit + 1;
81 }
82
83 /* __dtoa() doesn't allocate space for 0 so we do it by hand */
84 if (value == 0.0) {
85 *decpt = 1 - fmode; /* 1 for 'e', 0 for 'f' */
86 *sign = 0;
87 if ((rve = s = (char *)malloc(ndigit?siz:2)) == NULL) {
88 return(NULL);
89 }
90 *rve++ = '0';
91 *rve = '\0';
92 if (!ndigit) {
93 return(s);
94 }
95 } else {
96 p = zend_dtoa(value, fmode + 2, ndigit, decpt, sign, &rve);
97 if (*decpt == 9999) {
98 /* Infinity or Nan, convert to inf or nan like printf */
99 *decpt = 0;
100 c = *p;
101 zend_freedtoa(p);
102 return strdup((c == 'I' ? "INF" : "NAN"));
103 }
104 /* Make a local copy and adjust rve to be in terms of s */
105 if (pad && fmode) {
106 siz += *decpt;
107 }
108 if ((s = (char *)malloc(siz+1)) == NULL) {
109 zend_freedtoa(p);
110 return(NULL);
111 }
112 (void) strlcpy(s, p, siz);
113 rve = s + (rve - p);
114 zend_freedtoa(p);
115 }
116
117 /* Add trailing zeros */
118 if (pad) {
119 siz -= rve - s;
120 while (--siz) {
121 *rve++ = '0';
122 }
123 *rve = '\0';
124 }
125
126 return(s);
127 }
128 /* }}} */
129
php_ecvt(double value,int ndigit,int * decpt,int * sign)130 static inline char *php_ecvt(double value, int ndigit, int *decpt, int *sign) /* {{{ */
131 {
132 return(__cvt(value, ndigit, decpt, sign, 0, 1));
133 }
134 /* }}} */
135
php_fcvt(double value,int ndigit,int * decpt,int * sign)136 static inline char *php_fcvt(double value, int ndigit, int *decpt, int *sign) /* {{{ */
137 {
138 return(__cvt(value, ndigit, decpt, sign, 1, 1));
139 }
140 /* }}} */
141
php_gcvt(double value,int ndigit,char dec_point,char exponent,char * buf)142 PHPAPI char *php_gcvt(double value, int ndigit, char dec_point, char exponent, char *buf) /* {{{ */
143 {
144 char *digits, *dst, *src;
145 int i, decpt, sign;
146 int mode = ndigit >= 0 ? 2 : 0;
147
148 if (mode == 0) {
149 ndigit = 17;
150 }
151 digits = zend_dtoa(value, mode, ndigit, &decpt, &sign, NULL);
152 if (decpt == 9999) {
153 /*
154 * Infinity or NaN, convert to inf or nan with sign.
155 * We assume the buffer is at least ndigit long.
156 */
157 snprintf(buf, ndigit + 1, "%s%s", (sign && *digits == 'I') ? "-" : "", *digits == 'I' ? "INF" : "NAN");
158 zend_freedtoa(digits);
159 return (buf);
160 }
161
162 dst = buf;
163 if (sign) {
164 *dst++ = '-';
165 }
166
167 if ((decpt >= 0 && decpt > ndigit) || decpt < -3) { /* use E-style */
168 /* exponential format (e.g. 1.2345e+13) */
169 if (--decpt < 0) {
170 sign = 1;
171 decpt = -decpt;
172 } else {
173 sign = 0;
174 }
175 src = digits;
176 *dst++ = *src++;
177 *dst++ = dec_point;
178 if (*src == '\0') {
179 *dst++ = '0';
180 } else {
181 do {
182 *dst++ = *src++;
183 } while (*src != '\0');
184 }
185 *dst++ = exponent;
186 if (sign) {
187 *dst++ = '-';
188 } else {
189 *dst++ = '+';
190 }
191 if (decpt < 10) {
192 *dst++ = '0' + decpt;
193 *dst = '\0';
194 } else {
195 /* XXX - optimize */
196 for (sign = decpt, i = 0; (sign /= 10) != 0; i++)
197 continue;
198 dst[i + 1] = '\0';
199 while (decpt != 0) {
200 dst[i--] = '0' + decpt % 10;
201 decpt /= 10;
202 }
203 }
204 } else if (decpt < 0) {
205 /* standard format 0. */
206 *dst++ = '0'; /* zero before decimal point */
207 *dst++ = dec_point;
208 do {
209 *dst++ = '0';
210 } while (++decpt < 0);
211 src = digits;
212 while (*src != '\0') {
213 *dst++ = *src++;
214 }
215 *dst = '\0';
216 } else {
217 /* standard format */
218 for (i = 0, src = digits; i < decpt; i++) {
219 if (*src != '\0') {
220 *dst++ = *src++;
221 } else {
222 *dst++ = '0';
223 }
224 }
225 if (*src != '\0') {
226 if (src == digits) {
227 *dst++ = '0'; /* zero before decimal point */
228 }
229 *dst++ = dec_point;
230 for (i = decpt; digits[i] != '\0'; i++) {
231 *dst++ = digits[i];
232 }
233 }
234 *dst = '\0';
235 }
236 zend_freedtoa(digits);
237 return (buf);
238 }
239 /* }}} */
240
241 /* {{{ Apache license */
242 /* ====================================================================
243 * Copyright (c) 1995-1998 The Apache Group. All rights reserved.
244 *
245 * Redistribution and use in source and binary forms, with or without
246 * modification, are permitted provided that the following conditions
247 * are met:
248 *
249 * 1. Redistributions of source code must retain the above copyright
250 * notice, this list of conditions and the following disclaimer.
251 *
252 * 2. Redistributions in binary form must reproduce the above copyright
253 * notice, this list of conditions and the following disclaimer in
254 * the documentation and/or other materials provided with the
255 * distribution.
256 *
257 * 3. All advertising materials mentioning features or use of this
258 * software must display the following acknowledgment:
259 * "This product includes software developed by the Apache Group
260 * for use in the Apache HTTP server project (http://www.apache.org/)."
261 *
262 * 4. The names "Apache Server" and "Apache Group" must not be used to
263 * endorse or promote products derived from this software without
264 * prior written permission.
265 *
266 * 5. Redistributions of any form whatsoever must retain the following
267 * acknowledgment:
268 * "This product includes software developed by the Apache Group
269 * for use in the Apache HTTP server project (http://www.apache.org/)."
270 *
271 * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
272 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
273 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
274 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
275 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
276 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
277 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
278 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
279 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
280 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
281 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
282 * OF THE POSSIBILITY OF SUCH DAMAGE.
283 * ====================================================================
284 *
285 * This software consists of voluntary contributions made by many
286 * individuals on behalf of the Apache Group and was originally based
287 * on public domain software written at the National Center for
288 * Supercomputing Applications, University of Illinois, Urbana-Champaign.
289 * For more information on the Apache Group and the Apache HTTP server
290 * project, please see <http://www.apache.org/>.
291 *
292 * This code is based on, and used with the permission of, the
293 * SIO stdio-replacement strx_* functions by Panos Tsirigotis
294 * <panos@alumni.cs.colorado.edu> for xinetd.
295 */
296 /* }}} */
297
298 #define FALSE 0
299 #define TRUE 1
300 #define NUL '\0'
301 #define INT_NULL ((int *)0)
302
303 #define S_NULL "(null)"
304 #define S_NULL_LEN 6
305
306 #define FLOAT_DIGITS 6
307 #define EXPONENT_LENGTH 10
308
309
310 /*
311 * Convert num to its decimal format.
312 * Return value:
313 * - a pointer to a string containing the number (no sign)
314 * - len contains the length of the string
315 * - is_negative is set to TRUE or FALSE depending on the sign
316 * of the number (always set to FALSE if is_unsigned is TRUE)
317 *
318 * The caller provides a buffer for the string: that is the buf_end argument
319 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer
320 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
321 */
322 /* char * ap_php_conv_10() {{{ */
ap_php_conv_10(register wide_int num,register bool_int is_unsigned,register bool_int * is_negative,char * buf_end,register size_t * len)323 PHPAPI char * ap_php_conv_10(register wide_int num, register bool_int is_unsigned,
324 register bool_int * is_negative, char *buf_end, register size_t *len)
325 {
326 register char *p = buf_end;
327 register u_wide_int magnitude;
328
329 if (is_unsigned) {
330 magnitude = (u_wide_int) num;
331 *is_negative = FALSE;
332 } else {
333 *is_negative = (num < 0);
334
335 /*
336 * On a 2's complement machine, negating the most negative integer
337 * results in a number that cannot be represented as a signed integer.
338 * Here is what we do to obtain the number's magnitude:
339 * a. add 1 to the number
340 * b. negate it (becomes positive)
341 * c. convert it to unsigned
342 * d. add 1
343 */
344 if (*is_negative) {
345 wide_int t = num + 1;
346 magnitude = ((u_wide_int) - t) + 1;
347 } else {
348 magnitude = (u_wide_int) num;
349 }
350 }
351
352 /*
353 * We use a do-while loop so that we write at least 1 digit
354 */
355 do {
356 register u_wide_int new_magnitude = magnitude / 10;
357
358 *--p = (char)(magnitude - new_magnitude * 10 + '0');
359 magnitude = new_magnitude;
360 }
361 while (magnitude);
362
363 *len = buf_end - p;
364 return (p);
365 }
366 /* }}} */
367
368 /* If you change this value then also change bug24640.phpt.
369 * Also NDIG must be reasonable smaller than NUM_BUF_SIZE.
370 */
371 #define NDIG 320
372
373
374 /*
375 * Convert a floating point number to a string formats 'f', 'e' or 'E'.
376 * The result is placed in buf, and len denotes the length of the string
377 * The sign is returned in the is_negative argument (and is not placed
378 * in buf).
379 */
380 /* PHPAPI char * php_conv_fp() {{{ */
php_conv_fp(register char format,register double num,boolean_e add_dp,int precision,char dec_point,bool_int * is_negative,char * buf,size_t * len)381 PHPAPI char * php_conv_fp(register char format, register double num,
382 boolean_e add_dp, int precision, char dec_point, bool_int * is_negative, char *buf, size_t *len)
383 {
384 register char *s = buf;
385 register char *p, *p_orig;
386 int decimal_point;
387
388 if (precision >= NDIG - 1) {
389 precision = NDIG - 2;
390 }
391
392 if (format == 'F') {
393 p_orig = p = php_fcvt(num, precision, &decimal_point, is_negative);
394 } else { /* either e or E format */
395 p_orig = p = php_ecvt(num, precision + 1, &decimal_point, is_negative);
396 }
397
398 /*
399 * Check for Infinity and NaN
400 */
401 if (isalpha((int)*p)) {
402 *len = strlen(p);
403 memcpy(buf, p, *len + 1);
404 *is_negative = FALSE;
405 free(p_orig);
406 return (buf);
407 }
408 if (format == 'F') {
409 if (decimal_point <= 0) {
410 if (num != 0 || precision > 0) {
411 *s++ = '0';
412 if (precision > 0) {
413 *s++ = dec_point;
414 while (decimal_point++ < 0) {
415 *s++ = '0';
416 }
417 } else if (add_dp) {
418 *s++ = dec_point;
419 }
420 }
421 } else {
422 int addz = decimal_point >= NDIG ? decimal_point - NDIG + 1 : 0;
423 decimal_point -= addz;
424 while (decimal_point-- > 0) {
425 *s++ = *p++;
426 }
427 while (addz-- > 0) {
428 *s++ = '0';
429 }
430 if (precision > 0 || add_dp) {
431 *s++ = dec_point;
432 }
433 }
434 } else {
435 *s++ = *p++;
436 if (precision > 0 || add_dp) {
437 *s++ = '.';
438 }
439 }
440
441 /*
442 * copy the rest of p, the NUL is NOT copied
443 */
444 while (*p) {
445 *s++ = *p++;
446 }
447
448 if (format != 'F') {
449 char temp[EXPONENT_LENGTH]; /* for exponent conversion */
450 size_t t_len;
451 bool_int exponent_is_negative;
452
453 *s++ = format; /* either e or E */
454 decimal_point--;
455 if (decimal_point != 0) {
456 p = ap_php_conv_10((wide_int) decimal_point, FALSE, &exponent_is_negative, &temp[EXPONENT_LENGTH], &t_len);
457 *s++ = exponent_is_negative ? '-' : '+';
458
459 /*
460 * Make sure the exponent has at least 2 digits
461 */
462 while (t_len--) {
463 *s++ = *p++;
464 }
465 } else {
466 *s++ = '+';
467 *s++ = '0';
468 }
469 }
470 *len = s - buf;
471 free(p_orig);
472 return (buf);
473 }
474 /* }}} */
475
476 /*
477 * Convert num to a base X number where X is a power of 2. nbits determines X.
478 * For example, if nbits is 3, we do base 8 conversion
479 * Return value:
480 * a pointer to a string containing the number
481 *
482 * The caller provides a buffer for the string: that is the buf_end argument
483 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer
484 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
485 */
ap_php_conv_p2(register u_wide_int num,register int nbits,char format,char * buf_end,register size_t * len)486 PHPAPI char * ap_php_conv_p2(register u_wide_int num, register int nbits, char format, char *buf_end, register size_t *len) /* {{{ */
487 {
488 register int mask = (1 << nbits) - 1;
489 register char *p = buf_end;
490 static char low_digits[] = "0123456789abcdef";
491 static char upper_digits[] = "0123456789ABCDEF";
492 register char *digits = (format == 'X') ? upper_digits : low_digits;
493
494 do {
495 *--p = digits[num & mask];
496 num >>= nbits;
497 }
498 while (num);
499
500 *len = buf_end - p;
501 return (p);
502 }
503 /* }}} */
504
505 /*
506 * NUM_BUF_SIZE is the size of the buffer used for arithmetic conversions
507 *
508 * XXX: this is a magic number; do not decrease it
509 * Emax = 1023
510 * NDIG = 320
511 * NUM_BUF_SIZE >= strlen("-") + Emax + strlrn(".") + NDIG + strlen("E+1023") + 1;
512 */
513 #define NUM_BUF_SIZE 2048
514
515
516 /*
517 * Descriptor for buffer area
518 */
519 struct buf_area {
520 char *buf_end;
521 char *nextb; /* pointer to next byte to read/write */
522 };
523
524 typedef struct buf_area buffy;
525
526 /*
527 * The INS_CHAR macro inserts a character in the buffer and writes
528 * the buffer back to disk if necessary
529 * It uses the char pointers sp and bep:
530 * sp points to the next available character in the buffer
531 * bep points to the end-of-buffer+1
532 * While using this macro, note that the nextb pointer is NOT updated.
533 *
534 * NOTE: Evaluation of the c argument should not have any side-effects
535 */
536 #define INS_CHAR(c, sp, bep, cc) \
537 { \
538 if (sp < bep) \
539 { \
540 *sp++ = c; \
541 } \
542 cc++; \
543 }
544
545 #define NUM( c ) ( c - '0' )
546
547 #define STR_TO_DEC( str, num ) \
548 num = NUM( *str++ ) ; \
549 while ( isdigit((int)*str ) ) \
550 { \
551 num *= 10 ; \
552 num += NUM( *str++ ) ; \
553 }
554
555 /*
556 * This macro does zero padding so that the precision
557 * requirement is satisfied. The padding is done by
558 * adding '0's to the left of the string that is going
559 * to be printed.
560 */
561 #define FIX_PRECISION( adjust, precision, s, s_len ) \
562 if ( adjust ) \
563 while ( s_len < (size_t)precision ) \
564 { \
565 *--s = '0' ; \
566 s_len++ ; \
567 }
568
569 /*
570 * Macro that does padding. The padding is done by printing
571 * the character ch.
572 */
573 #define PAD( width, len, ch ) do \
574 { \
575 INS_CHAR( ch, sp, bep, cc ) ; \
576 width-- ; \
577 } \
578 while ( width > len )
579
580 /*
581 * Prefix the character ch to the string str
582 * Increase length
583 * Set the has_prefix flag
584 */
585 #define PREFIX( str, length, ch ) *--str = ch ; length++ ; has_prefix = YES
586
587
588 /*
589 * Do format conversion placing the output in buffer
590 */
format_converter(register buffy * odp,const char * fmt,va_list ap)591 static int format_converter(register buffy * odp, const char *fmt, va_list ap) /* {{{ */
592 {
593 char *sp;
594 char *bep;
595 int cc = 0;
596 size_t i;
597
598 char *s = NULL;
599 size_t s_len;
600 int free_zcopy;
601 zval *zvp, zcopy;
602
603 int min_width = 0;
604 int precision = 0;
605 enum {
606 LEFT, RIGHT
607 } adjust;
608 char pad_char;
609 char prefix_char;
610
611 double fp_num;
612 wide_int i_num = (wide_int) 0;
613 u_wide_int ui_num;
614
615 char num_buf[NUM_BUF_SIZE];
616 char char_buf[2]; /* for printing %% and %<unknown> */
617
618 #ifdef HAVE_LOCALE_H
619 #ifdef ZTS
620 struct lconv lconv;
621 #else
622 struct lconv *lconv = NULL;
623 #endif
624 #endif
625
626 /*
627 * Flag variables
628 */
629 length_modifier_e modifier;
630 boolean_e alternate_form;
631 boolean_e print_sign;
632 boolean_e print_blank;
633 boolean_e adjust_precision;
634 boolean_e adjust_width;
635 bool_int is_negative;
636
637 sp = odp->nextb;
638 bep = odp->buf_end;
639
640 while (*fmt) {
641 if (*fmt != '%') {
642 INS_CHAR(*fmt, sp, bep, cc);
643 } else {
644 /*
645 * Default variable settings
646 */
647 adjust = RIGHT;
648 alternate_form = print_sign = print_blank = NO;
649 pad_char = ' ';
650 prefix_char = NUL;
651 free_zcopy = 0;
652
653 fmt++;
654
655 /*
656 * Try to avoid checking for flags, width or precision
657 */
658 if (isascii((int)*fmt) && !islower((int)*fmt)) {
659 /*
660 * Recognize flags: -, #, BLANK, +
661 */
662 for (;; fmt++) {
663 if (*fmt == '-')
664 adjust = LEFT;
665 else if (*fmt == '+')
666 print_sign = YES;
667 else if (*fmt == '#')
668 alternate_form = YES;
669 else if (*fmt == ' ')
670 print_blank = YES;
671 else if (*fmt == '0')
672 pad_char = '0';
673 else
674 break;
675 }
676
677 /*
678 * Check if a width was specified
679 */
680 if (isdigit((int)*fmt)) {
681 STR_TO_DEC(fmt, min_width);
682 adjust_width = YES;
683 } else if (*fmt == '*') {
684 min_width = va_arg(ap, int);
685 fmt++;
686 adjust_width = YES;
687 if (min_width < 0) {
688 adjust = LEFT;
689 min_width = -min_width;
690 }
691 } else
692 adjust_width = NO;
693
694 /*
695 * Check if a precision was specified
696 */
697 if (*fmt == '.') {
698 adjust_precision = YES;
699 fmt++;
700 if (isdigit((int)*fmt)) {
701 STR_TO_DEC(fmt, precision);
702 } else if (*fmt == '*') {
703 precision = va_arg(ap, int);
704 fmt++;
705 if (precision < 0)
706 precision = 0;
707 } else
708 precision = 0;
709
710 if (precision > FORMAT_CONV_MAX_PRECISION) {
711 precision = FORMAT_CONV_MAX_PRECISION;
712 }
713 } else
714 adjust_precision = NO;
715 } else
716 adjust_precision = adjust_width = NO;
717
718 /*
719 * Modifier check
720 */
721 switch (*fmt) {
722 case 'L':
723 fmt++;
724 modifier = LM_LONG_DOUBLE;
725 break;
726 case 'I':
727 fmt++;
728 #if SIZEOF_LONG_LONG
729 if (*fmt == '6' && *(fmt+1) == '4') {
730 fmt += 2;
731 modifier = LM_LONG_LONG;
732 } else
733 #endif
734 if (*fmt == '3' && *(fmt+1) == '2') {
735 fmt += 2;
736 modifier = LM_LONG;
737 } else {
738 #ifdef _WIN64
739 modifier = LM_LONG_LONG;
740 #else
741 modifier = LM_LONG;
742 #endif
743 }
744 break;
745 case 'l':
746 fmt++;
747 #if SIZEOF_LONG_LONG
748 if (*fmt == 'l') {
749 fmt++;
750 modifier = LM_LONG_LONG;
751 } else
752 #endif
753 modifier = LM_LONG;
754 break;
755 case 'z':
756 fmt++;
757 modifier = LM_SIZE_T;
758 break;
759 case 'j':
760 fmt++;
761 #if SIZEOF_INTMAX_T
762 modifier = LM_INTMAX_T;
763 #else
764 modifier = LM_SIZE_T;
765 #endif
766 break;
767 case 't':
768 fmt++;
769 #if SIZEOF_PTRDIFF_T
770 modifier = LM_PTRDIFF_T;
771 #else
772 modifier = LM_SIZE_T;
773 #endif
774 break;
775 case 'p':
776 fmt++;
777 modifier = LM_PHP_INT_T;
778 break;
779 case 'h':
780 fmt++;
781 if (*fmt == 'h') {
782 fmt++;
783 }
784 /* these are promoted to int, so no break */
785 default:
786 modifier = LM_STD;
787 break;
788 }
789
790 /*
791 * Argument extraction and printing.
792 * First we determine the argument type.
793 * Then, we convert the argument to a string.
794 * On exit from the switch, s points to the string that
795 * must be printed, s_len has the length of the string
796 * The precision requirements, if any, are reflected in s_len.
797 *
798 * NOTE: pad_char may be set to '0' because of the 0 flag.
799 * It is reset to ' ' by non-numeric formats
800 */
801 switch (*fmt) {
802 case 'Z': {
803 zvp = (zval*) va_arg(ap, zval*);
804 free_zcopy = zend_make_printable_zval(zvp, &zcopy);
805 if (free_zcopy) {
806 zvp = &zcopy;
807 }
808 s_len = Z_STRLEN_P(zvp);
809 s = Z_STRVAL_P(zvp);
810 if (adjust_precision && (size_t)precision < s_len) {
811 s_len = precision;
812 }
813 break;
814 }
815 case 'u':
816 switch(modifier) {
817 default:
818 i_num = (wide_int) va_arg(ap, unsigned int);
819 break;
820 case LM_LONG_DOUBLE:
821 goto fmt_error;
822 case LM_LONG:
823 i_num = (wide_int) va_arg(ap, unsigned long int);
824 break;
825 case LM_SIZE_T:
826 i_num = (wide_int) va_arg(ap, size_t);
827 break;
828 #if SIZEOF_LONG_LONG
829 case LM_LONG_LONG:
830 i_num = (wide_int) va_arg(ap, u_wide_int);
831 break;
832 #endif
833 #if SIZEOF_INTMAX_T
834 case LM_INTMAX_T:
835 i_num = (wide_int) va_arg(ap, uintmax_t);
836 break;
837 #endif
838 #if SIZEOF_PTRDIFF_T
839 case LM_PTRDIFF_T:
840 i_num = (wide_int) va_arg(ap, ptrdiff_t);
841 break;
842 #endif
843 case LM_PHP_INT_T:
844 i_num = (wide_int) va_arg(ap, zend_ulong);
845 break;
846 }
847 /*
848 * The rest also applies to other integer formats, so fall
849 * into that case.
850 */
851 case 'd':
852 case 'i':
853 /*
854 * Get the arg if we haven't already.
855 */
856 if ((*fmt) != 'u') {
857 switch(modifier) {
858 default:
859 i_num = (wide_int) va_arg(ap, int);
860 break;
861 case LM_LONG_DOUBLE:
862 goto fmt_error;
863 case LM_LONG:
864 i_num = (wide_int) va_arg(ap, long int);
865 break;
866 case LM_SIZE_T:
867 #if SIZEOF_SSIZE_T
868 i_num = (wide_int) va_arg(ap, ssize_t);
869 #else
870 i_num = (wide_int) va_arg(ap, size_t);
871 #endif
872 break;
873 #if SIZEOF_LONG_LONG
874 case LM_LONG_LONG:
875 i_num = (wide_int) va_arg(ap, wide_int);
876 break;
877 #endif
878 #if SIZEOF_INTMAX_T
879 case LM_INTMAX_T:
880 i_num = (wide_int) va_arg(ap, intmax_t);
881 break;
882 #endif
883 #if SIZEOF_PTRDIFF_T
884 case LM_PTRDIFF_T:
885 i_num = (wide_int) va_arg(ap, ptrdiff_t);
886 break;
887 #endif
888 case LM_PHP_INT_T:
889 i_num = (wide_int) va_arg(ap, zend_long);
890 break;
891 }
892 }
893 s = ap_php_conv_10(i_num, (*fmt) == 'u', &is_negative,
894 &num_buf[NUM_BUF_SIZE], &s_len);
895 FIX_PRECISION(adjust_precision, precision, s, s_len);
896
897 if (*fmt != 'u') {
898 if (is_negative) {
899 prefix_char = '-';
900 } else if (print_sign) {
901 prefix_char = '+';
902 } else if (print_blank) {
903 prefix_char = ' ';
904 }
905 }
906 break;
907
908
909 case 'o':
910 switch(modifier) {
911 default:
912 ui_num = (u_wide_int) va_arg(ap, unsigned int);
913 break;
914 case LM_LONG_DOUBLE:
915 goto fmt_error;
916 case LM_LONG:
917 ui_num = (u_wide_int) va_arg(ap, unsigned long int);
918 break;
919 case LM_SIZE_T:
920 ui_num = (u_wide_int) va_arg(ap, size_t);
921 break;
922 #if SIZEOF_LONG_LONG
923 case LM_LONG_LONG:
924 ui_num = (u_wide_int) va_arg(ap, u_wide_int);
925 break;
926 #endif
927 #if SIZEOF_INTMAX_T
928 case LM_INTMAX_T:
929 ui_num = (u_wide_int) va_arg(ap, uintmax_t);
930 break;
931 #endif
932 #if SIZEOF_PTRDIFF_T
933 case LM_PTRDIFF_T:
934 ui_num = (u_wide_int) va_arg(ap, ptrdiff_t);
935 break;
936 #endif
937 case LM_PHP_INT_T:
938 ui_num = (u_wide_int) va_arg(ap, zend_ulong);
939 break;
940 }
941 s = ap_php_conv_p2(ui_num, 3, *fmt, &num_buf[NUM_BUF_SIZE], &s_len);
942 FIX_PRECISION(adjust_precision, precision, s, s_len);
943 if (alternate_form && *s != '0') {
944 *--s = '0';
945 s_len++;
946 }
947 break;
948
949
950 case 'x':
951 case 'X':
952 switch(modifier) {
953 default:
954 ui_num = (u_wide_int) va_arg(ap, unsigned int);
955 break;
956 case LM_LONG_DOUBLE:
957 goto fmt_error;
958 case LM_LONG:
959 ui_num = (u_wide_int) va_arg(ap, unsigned long int);
960 break;
961 case LM_SIZE_T:
962 ui_num = (u_wide_int) va_arg(ap, size_t);
963 break;
964 #if SIZEOF_LONG_LONG
965 case LM_LONG_LONG:
966 ui_num = (u_wide_int) va_arg(ap, u_wide_int);
967 break;
968 #endif
969 #if SIZEOF_INTMAX_T
970 case LM_INTMAX_T:
971 ui_num = (u_wide_int) va_arg(ap, uintmax_t);
972 break;
973 #endif
974 #if SIZEOF_PTRDIFF_T
975 case LM_PTRDIFF_T:
976 ui_num = (u_wide_int) va_arg(ap, ptrdiff_t);
977 break;
978 #endif
979 case LM_PHP_INT_T:
980 ui_num = (u_wide_int) va_arg(ap, zend_ulong);
981 break;
982 }
983 s = ap_php_conv_p2(ui_num, 4, *fmt, &num_buf[NUM_BUF_SIZE], &s_len);
984 FIX_PRECISION(adjust_precision, precision, s, s_len);
985 if (alternate_form && i_num != 0) {
986 *--s = *fmt; /* 'x' or 'X' */
987 *--s = '0';
988 s_len += 2;
989 }
990 break;
991
992
993 case 's':
994 case 'v':
995 s = va_arg(ap, char *);
996 if (s != NULL) {
997 s_len = strlen(s);
998 if (adjust_precision && (size_t)precision < s_len) {
999 s_len = precision;
1000 }
1001 } else {
1002 s = S_NULL;
1003 s_len = S_NULL_LEN;
1004 }
1005 pad_char = ' ';
1006 break;
1007
1008
1009 case 'f':
1010 case 'F':
1011 case 'e':
1012 case 'E':
1013 switch(modifier) {
1014 case LM_LONG_DOUBLE:
1015 fp_num = (double) va_arg(ap, long double);
1016 break;
1017 case LM_STD:
1018 fp_num = va_arg(ap, double);
1019 break;
1020 default:
1021 goto fmt_error;
1022 }
1023
1024 if (zend_isnan(fp_num)) {
1025 s = "NAN";
1026 s_len = 3;
1027 } else if (zend_isinf(fp_num)) {
1028 s = "INF";
1029 s_len = 3;
1030 } else {
1031 #ifdef HAVE_LOCALE_H
1032 #ifdef ZTS
1033 localeconv_r(&lconv);
1034 #else
1035 if (!lconv) {
1036 lconv = localeconv();
1037 }
1038 #endif
1039 #endif
1040 s = php_conv_fp((*fmt == 'f')?'F':*fmt, fp_num, alternate_form,
1041 (adjust_precision == NO) ? FLOAT_DIGITS : precision,
1042 (*fmt == 'f')?LCONV_DECIMAL_POINT:'.',
1043 &is_negative, &num_buf[1], &s_len);
1044 if (is_negative)
1045 prefix_char = '-';
1046 else if (print_sign)
1047 prefix_char = '+';
1048 else if (print_blank)
1049 prefix_char = ' ';
1050 }
1051 break;
1052
1053
1054 case 'g':
1055 case 'k':
1056 case 'G':
1057 case 'H':
1058 switch(modifier) {
1059 case LM_LONG_DOUBLE:
1060 fp_num = (double) va_arg(ap, long double);
1061 break;
1062 case LM_STD:
1063 fp_num = va_arg(ap, double);
1064 break;
1065 default:
1066 goto fmt_error;
1067 }
1068
1069 if (zend_isnan(fp_num)) {
1070 s = "NAN";
1071 s_len = 3;
1072 break;
1073 } else if (zend_isinf(fp_num)) {
1074 if (fp_num > 0) {
1075 s = "INF";
1076 s_len = 3;
1077 } else {
1078 s = "-INF";
1079 s_len = 4;
1080 }
1081 break;
1082 }
1083
1084 if (adjust_precision == NO) {
1085 precision = FLOAT_DIGITS;
1086 } else if (precision == 0) {
1087 precision = 1;
1088 }
1089 /*
1090 * * We use &num_buf[ 1 ], so that we have room for the sign
1091 */
1092 #ifdef HAVE_LOCALE_H
1093 #ifdef ZTS
1094 localeconv_r(&lconv);
1095 #else
1096 if (!lconv) {
1097 lconv = localeconv();
1098 }
1099 #endif
1100 #endif
1101 s = php_gcvt(fp_num, precision, (*fmt=='H' || *fmt == 'k') ? '.' : LCONV_DECIMAL_POINT, (*fmt == 'G' || *fmt == 'H')?'E':'e', &num_buf[1]);
1102 if (*s == '-') {
1103 prefix_char = *s++;
1104 } else if (print_sign) {
1105 prefix_char = '+';
1106 } else if (print_blank) {
1107 prefix_char = ' ';
1108 }
1109
1110 s_len = strlen(s);
1111
1112 if (alternate_form && (strchr(s, '.')) == NULL) {
1113 s[s_len++] = '.';
1114 }
1115 break;
1116
1117
1118 case 'c':
1119 char_buf[0] = (char) (va_arg(ap, int));
1120 s = &char_buf[0];
1121 s_len = 1;
1122 pad_char = ' ';
1123 break;
1124
1125
1126 case '%':
1127 char_buf[0] = '%';
1128 s = &char_buf[0];
1129 s_len = 1;
1130 pad_char = ' ';
1131 break;
1132
1133
1134 case 'n':
1135 *(va_arg(ap, int *)) = cc;
1136 goto skip_output;
1137
1138 /*
1139 * Always extract the argument as a "char *" pointer. We
1140 * should be using "void *" but there are still machines
1141 * that don't understand it.
1142 * If the pointer size is equal to the size of an unsigned
1143 * integer we convert the pointer to a hex number, otherwise
1144 * we print "%p" to indicate that we don't handle "%p".
1145 */
1146 case 'p':
1147 if (sizeof(char *) <= sizeof(u_wide_int)) {
1148 ui_num = (u_wide_int)((size_t) va_arg(ap, char *));
1149 s = ap_php_conv_p2(ui_num, 4, 'x',
1150 &num_buf[NUM_BUF_SIZE], &s_len);
1151 if (ui_num != 0) {
1152 *--s = 'x';
1153 *--s = '0';
1154 s_len += 2;
1155 }
1156 } else {
1157 s = "%p";
1158 s_len = 2;
1159 }
1160 pad_char = ' ';
1161 break;
1162
1163
1164 case NUL:
1165 /*
1166 * The last character of the format string was %.
1167 * We ignore it.
1168 */
1169 continue;
1170
1171
1172 fmt_error:
1173 php_error(E_ERROR, "Illegal length modifier specified '%c' in s[np]printf call", *fmt);
1174 /*
1175 * The default case is for unrecognized %'s.
1176 * We print %<char> to help the user identify what
1177 * option is not understood.
1178 * This is also useful in case the user wants to pass
1179 * the output of format_converter to another function
1180 * that understands some other %<char> (like syslog).
1181 * Note that we can't point s inside fmt because the
1182 * unknown <char> could be preceded by width etc.
1183 */
1184 default:
1185 char_buf[0] = '%';
1186 char_buf[1] = *fmt;
1187 s = char_buf;
1188 s_len = 2;
1189 pad_char = ' ';
1190 break;
1191 }
1192
1193 if (prefix_char != NUL) {
1194 *--s = prefix_char;
1195 s_len++;
1196 }
1197 if (adjust_width && adjust == RIGHT && (size_t)min_width > s_len) {
1198 if (pad_char == '0' && prefix_char != NUL) {
1199 INS_CHAR(*s, sp, bep, cc)
1200 s++;
1201 s_len--;
1202 min_width--;
1203 }
1204 PAD((size_t)min_width, s_len, pad_char);
1205 }
1206 /*
1207 * Print the string s.
1208 */
1209 for (i = s_len; i != 0; i--) {
1210 INS_CHAR(*s, sp, bep, cc);
1211 s++;
1212 }
1213
1214 if (adjust_width && adjust == LEFT && (size_t)min_width > s_len)
1215 PAD((size_t)min_width, s_len, pad_char);
1216 if (free_zcopy) {
1217 zval_dtor(&zcopy);
1218 }
1219 }
1220 skip_output:
1221 fmt++;
1222 }
1223 odp->nextb = sp;
1224 return (cc);
1225 }
1226 /* }}} */
1227
1228 /*
1229 * This is the general purpose conversion function.
1230 */
strx_printv(int * ccp,char * buf,size_t len,const char * format,va_list ap)1231 static void strx_printv(int *ccp, char *buf, size_t len, const char *format, va_list ap) /* {{{ */
1232 {
1233 buffy od;
1234 int cc;
1235
1236 /*
1237 * First initialize the descriptor
1238 * Notice that if no length is given, we initialize buf_end to the
1239 * highest possible address.
1240 */
1241 if (len == 0) {
1242 od.buf_end = (char *) ~0;
1243 od.nextb = (char *) ~0;
1244 } else {
1245 od.buf_end = &buf[len-1];
1246 od.nextb = buf;
1247 }
1248
1249 /*
1250 * Do the conversion
1251 */
1252 cc = format_converter(&od, format, ap);
1253 if (len != 0 && od.nextb <= od.buf_end) {
1254 *(od.nextb) = '\0';
1255 }
1256 if (ccp) {
1257 *ccp = cc;
1258 }
1259 }
1260 /* }}} */
1261
ap_php_slprintf(char * buf,size_t len,const char * format,...)1262 PHPAPI int ap_php_slprintf(char *buf, size_t len, const char *format,...) /* {{{ */
1263 {
1264 int cc;
1265 va_list ap;
1266
1267 va_start(ap, format);
1268 strx_printv(&cc, buf, len, format, ap);
1269 va_end(ap);
1270 if ((size_t)cc >= len) {
1271 cc = (int)len -1;
1272 buf[cc] = '\0';
1273 }
1274 return cc;
1275 }
1276 /* }}} */
1277
ap_php_vslprintf(char * buf,size_t len,const char * format,va_list ap)1278 PHPAPI int ap_php_vslprintf(char *buf, size_t len, const char *format, va_list ap) /* {{{ */
1279 {
1280 int cc;
1281
1282 strx_printv(&cc, buf, len, format, ap);
1283 if ((size_t)cc >= len) {
1284 cc = (int)len -1;
1285 buf[cc] = '\0';
1286 }
1287 return cc;
1288 }
1289 /* }}} */
1290
ap_php_snprintf(char * buf,size_t len,const char * format,...)1291 PHPAPI int ap_php_snprintf(char *buf, size_t len, const char *format,...) /* {{{ */
1292 {
1293 int cc;
1294 va_list ap;
1295
1296 va_start(ap, format);
1297 strx_printv(&cc, buf, len, format, ap);
1298 va_end(ap);
1299 return (cc);
1300 }
1301 /* }}} */
1302
ap_php_vsnprintf(char * buf,size_t len,const char * format,va_list ap)1303 PHPAPI int ap_php_vsnprintf(char *buf, size_t len, const char *format, va_list ap) /* {{{ */
1304 {
1305 int cc;
1306
1307 strx_printv(&cc, buf, len, format, ap);
1308 return (cc);
1309 }
1310 /* }}} */
1311
ap_php_vasprintf(char ** buf,const char * format,va_list ap)1312 PHPAPI int ap_php_vasprintf(char **buf, const char *format, va_list ap) /* {{{ */
1313 {
1314 va_list ap2;
1315 int cc;
1316
1317 va_copy(ap2, ap);
1318 cc = ap_php_vsnprintf(NULL, 0, format, ap2);
1319 va_end(ap2);
1320
1321 *buf = NULL;
1322
1323 if (cc >= 0) {
1324 if ((*buf = malloc(++cc)) != NULL) {
1325 if ((cc = ap_php_vsnprintf(*buf, cc, format, ap)) < 0) {
1326 free(*buf);
1327 *buf = NULL;
1328 }
1329 }
1330 }
1331
1332 return cc;
1333 }
1334 /* }}} */
1335
ap_php_asprintf(char ** buf,const char * format,...)1336 PHPAPI int ap_php_asprintf(char **buf, const char *format, ...) /* {{{ */
1337 {
1338 int cc;
1339 va_list ap;
1340
1341 va_start(ap, format);
1342 cc = vasprintf(buf, format, ap);
1343 va_end(ap);
1344 return cc;
1345 }
1346 /* }}} */
1347
1348 /*
1349 * Local variables:
1350 * tab-width: 4
1351 * c-basic-offset: 4
1352 * End:
1353 * vim600: sw=4 ts=4 fdm=marker
1354 * vim<600: sw=4 ts=4
1355 */
1356
