1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2016 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
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
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
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
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
147 digits = zend_dtoa(value, 2, ndigit, &decpt, &sign, NULL);
148 if (decpt == 9999) {
149 /*
150 * Infinity or NaN, convert to inf or nan with sign.
151 * We assume the buffer is at least ndigit long.
152 */
153 snprintf(buf, ndigit + 1, "%s%s", (sign && *digits == 'I') ? "-" : "", *digits == 'I' ? "INF" : "NAN");
154 zend_freedtoa(digits);
155 return (buf);
156 }
157
158 dst = buf;
159 if (sign) {
160 *dst++ = '-';
161 }
162
163 if ((decpt >= 0 && decpt > ndigit) || decpt < -3) { /* use E-style */
164 /* exponential format (e.g. 1.2345e+13) */
165 if (--decpt < 0) {
166 sign = 1;
167 decpt = -decpt;
168 } else {
169 sign = 0;
170 }
171 src = digits;
172 *dst++ = *src++;
173 *dst++ = dec_point;
174 if (*src == '\0') {
175 *dst++ = '0';
176 } else {
177 do {
178 *dst++ = *src++;
179 } while (*src != '\0');
180 }
181 *dst++ = exponent;
182 if (sign) {
183 *dst++ = '-';
184 } else {
185 *dst++ = '+';
186 }
187 if (decpt < 10) {
188 *dst++ = '0' + decpt;
189 *dst = '\0';
190 } else {
191 /* XXX - optimize */
192 for (sign = decpt, i = 0; (sign /= 10) != 0; i++)
193 continue;
194 dst[i + 1] = '\0';
195 while (decpt != 0) {
196 dst[i--] = '0' + decpt % 10;
197 decpt /= 10;
198 }
199 }
200 } else if (decpt < 0) {
201 /* standard format 0. */
202 *dst++ = '0'; /* zero before decimal point */
203 *dst++ = dec_point;
204 do {
205 *dst++ = '0';
206 } while (++decpt < 0);
207 src = digits;
208 while (*src != '\0') {
209 *dst++ = *src++;
210 }
211 *dst = '\0';
212 } else {
213 /* standard format */
214 for (i = 0, src = digits; i < decpt; i++) {
215 if (*src != '\0') {
216 *dst++ = *src++;
217 } else {
218 *dst++ = '0';
219 }
220 }
221 if (*src != '\0') {
222 if (src == digits) {
223 *dst++ = '0'; /* zero before decimal point */
224 }
225 *dst++ = dec_point;
226 for (i = decpt; digits[i] != '\0'; i++) {
227 *dst++ = digits[i];
228 }
229 }
230 *dst = '\0';
231 }
232 zend_freedtoa(digits);
233 return (buf);
234 }
235 /* }}} */
236
237 /* {{{ Apache license */
238 /* ====================================================================
239 * Copyright (c) 1995-1998 The Apache Group. All rights reserved.
240 *
241 * Redistribution and use in source and binary forms, with or without
242 * modification, are permitted provided that the following conditions
243 * are met:
244 *
245 * 1. Redistributions of source code must retain the above copyright
246 * notice, this list of conditions and the following disclaimer.
247 *
248 * 2. Redistributions in binary form must reproduce the above copyright
249 * notice, this list of conditions and the following disclaimer in
250 * the documentation and/or other materials provided with the
251 * distribution.
252 *
253 * 3. All advertising materials mentioning features or use of this
254 * software must display the following acknowledgment:
255 * "This product includes software developed by the Apache Group
256 * for use in the Apache HTTP server project (http://www.apache.org/)."
257 *
258 * 4. The names "Apache Server" and "Apache Group" must not be used to
259 * endorse or promote products derived from this software without
260 * prior written permission.
261 *
262 * 5. Redistributions of any form whatsoever must retain the following
263 * acknowledgment:
264 * "This product includes software developed by the Apache Group
265 * for use in the Apache HTTP server project (http://www.apache.org/)."
266 *
267 * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
268 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
269 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
270 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
271 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
272 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
273 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
274 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
275 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
276 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
277 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
278 * OF THE POSSIBILITY OF SUCH DAMAGE.
279 * ====================================================================
280 *
281 * This software consists of voluntary contributions made by many
282 * individuals on behalf of the Apache Group and was originally based
283 * on public domain software written at the National Center for
284 * Supercomputing Applications, University of Illinois, Urbana-Champaign.
285 * For more information on the Apache Group and the Apache HTTP server
286 * project, please see <http://www.apache.org/>.
287 *
288 * This code is based on, and used with the permission of, the
289 * SIO stdio-replacement strx_* functions by Panos Tsirigotis
290 * <panos@alumni.cs.colorado.edu> for xinetd.
291 */
292 /* }}} */
293
294 #define FALSE 0
295 #define TRUE 1
296 #define NUL '\0'
297 #define INT_NULL ((int *)0)
298
299 #define S_NULL "(null)"
300 #define S_NULL_LEN 6
301
302 #define FLOAT_DIGITS 6
303 #define EXPONENT_LENGTH 10
304
305
306 /*
307 * Convert num to its decimal format.
308 * Return value:
309 * - a pointer to a string containing the number (no sign)
310 * - len contains the length of the string
311 * - is_negative is set to TRUE or FALSE depending on the sign
312 * of the number (always set to FALSE if is_unsigned is TRUE)
313 *
314 * The caller provides a buffer for the string: that is the buf_end argument
315 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer
316 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
317 */
318 /* char * ap_php_conv_10() {{{ */
319 PHPAPI char * ap_php_conv_10(register wide_int num, register bool_int is_unsigned,
320 register bool_int * is_negative, char *buf_end, register int *len)
321 {
322 register char *p = buf_end;
323 register u_wide_int magnitude;
324
325 if (is_unsigned) {
326 magnitude = (u_wide_int) num;
327 *is_negative = FALSE;
328 } else {
329 *is_negative = (num < 0);
330
331 /*
332 * On a 2's complement machine, negating the most negative integer
333 * results in a number that cannot be represented as a signed integer.
334 * Here is what we do to obtain the number's magnitude:
335 * a. add 1 to the number
336 * b. negate it (becomes positive)
337 * c. convert it to unsigned
338 * d. add 1
339 */
340 if (*is_negative) {
341 wide_int t = num + 1;
342 magnitude = ((u_wide_int) - t) + 1;
343 } else {
344 magnitude = (u_wide_int) num;
345 }
346 }
347
348 /*
349 * We use a do-while loop so that we write at least 1 digit
350 */
351 do {
352 register u_wide_int new_magnitude = magnitude / 10;
353
354 *--p = (char)(magnitude - new_magnitude * 10 + '0');
355 magnitude = new_magnitude;
356 }
357 while (magnitude);
358
359 *len = buf_end - p;
360 return (p);
361 }
362 /* }}} */
363
364 /* If you change this value then also change bug24640.phpt.
365 * Also NDIG must be reasonable smaller than NUM_BUF_SIZE.
366 */
367 #define NDIG 320
368
369
370 /*
371 * Convert a floating point number to a string formats 'f', 'e' or 'E'.
372 * The result is placed in buf, and len denotes the length of the string
373 * The sign is returned in the is_negative argument (and is not placed
374 * in buf).
375 */
376 /* PHPAPI char * php_conv_fp() {{{ */
377 PHPAPI char * php_conv_fp(register char format, register double num,
378 boolean_e add_dp, int precision, char dec_point, bool_int * is_negative, char *buf, int *len)
379 {
380 register char *s = buf;
381 register char *p, *p_orig;
382 int decimal_point;
383
384 if (precision >= NDIG - 1) {
385 precision = NDIG - 2;
386 }
387
388 if (format == 'F') {
389 p_orig = p = php_fcvt(num, precision, &decimal_point, is_negative);
390 } else { /* either e or E format */
391 p_orig = p = php_ecvt(num, precision + 1, &decimal_point, is_negative);
392 }
393
394 /*
395 * Check for Infinity and NaN
396 */
397 if (isalpha((int)*p)) {
398 *len = strlen(p);
399 memcpy(buf, p, *len + 1);
400 *is_negative = FALSE;
401 free(p_orig);
402 return (buf);
403 }
404 if (format == 'F') {
405 if (decimal_point <= 0) {
406 if (num != 0 || precision > 0) {
407 *s++ = '0';
408 if (precision > 0) {
409 *s++ = dec_point;
410 while (decimal_point++ < 0) {
411 *s++ = '0';
412 }
413 } else if (add_dp) {
414 *s++ = dec_point;
415 }
416 }
417 } else {
418 int addz = decimal_point >= NDIG ? decimal_point - NDIG + 1 : 0;
419 decimal_point -= addz;
420 while (decimal_point-- > 0) {
421 *s++ = *p++;
422 }
423 while (addz-- > 0) {
424 *s++ = '0';
425 }
426 if (precision > 0 || add_dp) {
427 *s++ = dec_point;
428 }
429 }
430 } else {
431 *s++ = *p++;
432 if (precision > 0 || add_dp) {
433 *s++ = '.';
434 }
435 }
436
437 /*
438 * copy the rest of p, the NUL is NOT copied
439 */
440 while (*p) {
441 *s++ = *p++;
442 }
443
444 if (format != 'F') {
445 char temp[EXPONENT_LENGTH]; /* for exponent conversion */
446 int t_len;
447 bool_int exponent_is_negative;
448
449 *s++ = format; /* either e or E */
450 decimal_point--;
451 if (decimal_point != 0) {
452 p = ap_php_conv_10((wide_int) decimal_point, FALSE, &exponent_is_negative, &temp[EXPONENT_LENGTH], &t_len);
453 *s++ = exponent_is_negative ? '-' : '+';
454
455 /*
456 * Make sure the exponent has at least 2 digits
457 */
458 while (t_len--) {
459 *s++ = *p++;
460 }
461 } else {
462 *s++ = '+';
463 *s++ = '0';
464 }
465 }
466 *len = s - buf;
467 free(p_orig);
468 return (buf);
469 }
470 /* }}} */
471
472 /*
473 * Convert num to a base X number where X is a power of 2. nbits determines X.
474 * For example, if nbits is 3, we do base 8 conversion
475 * Return value:
476 * a pointer to a string containing the number
477 *
478 * The caller provides a buffer for the string: that is the buf_end argument
479 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer
480 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
481 */
482 PHPAPI char * ap_php_conv_p2(register u_wide_int num, register int nbits, char format, char *buf_end, register int *len) /* {{{ */
483 {
484 register int mask = (1 << nbits) - 1;
485 register char *p = buf_end;
486 static char low_digits[] = "0123456789abcdef";
487 static char upper_digits[] = "0123456789ABCDEF";
488 register char *digits = (format == 'X') ? upper_digits : low_digits;
489
490 do {
491 *--p = digits[num & mask];
492 num >>= nbits;
493 }
494 while (num);
495
496 *len = buf_end - p;
497 return (p);
498 }
499 /* }}} */
500
501 /*
502 * NUM_BUF_SIZE is the size of the buffer used for arithmetic conversions
503 *
504 * XXX: this is a magic number; do not decrease it
505 * Emax = 1023
506 * NDIG = 320
507 * NUM_BUF_SIZE >= strlen("-") + Emax + strlrn(".") + NDIG + strlen("E+1023") + 1;
508 */
509 #define NUM_BUF_SIZE 2048
510
511
512 /*
513 * Descriptor for buffer area
514 */
515 struct buf_area {
516 char *buf_end;
517 char *nextb; /* pointer to next byte to read/write */
518 };
519
520 typedef struct buf_area buffy;
521
522 /*
523 * The INS_CHAR macro inserts a character in the buffer and writes
524 * the buffer back to disk if necessary
525 * It uses the char pointers sp and bep:
526 * sp points to the next available character in the buffer
527 * bep points to the end-of-buffer+1
528 * While using this macro, note that the nextb pointer is NOT updated.
529 *
530 * NOTE: Evaluation of the c argument should not have any side-effects
531 */
532 #define INS_CHAR(c, sp, bep, cc) \
533 { \
534 if (sp < bep) \
535 { \
536 *sp++ = c; \
537 } \
538 cc++; \
539 }
540
541 #define NUM( c ) ( c - '0' )
542
543 #define STR_TO_DEC( str, num ) \
544 num = NUM( *str++ ) ; \
545 while ( isdigit((int)*str ) ) \
546 { \
547 num *= 10 ; \
548 num += NUM( *str++ ) ; \
549 }
550
551 /*
552 * This macro does zero padding so that the precision
553 * requirement is satisfied. The padding is done by
554 * adding '0's to the left of the string that is going
555 * to be printed.
556 */
557 #define FIX_PRECISION( adjust, precision, s, s_len ) \
558 if ( adjust ) \
559 while ( s_len < precision ) \
560 { \
561 *--s = '0' ; \
562 s_len++ ; \
563 }
564
565 /*
566 * Macro that does padding. The padding is done by printing
567 * the character ch.
568 */
569 #define PAD( width, len, ch ) do \
570 { \
571 INS_CHAR( ch, sp, bep, cc ) ; \
572 width-- ; \
573 } \
574 while ( width > len )
575
576 /*
577 * Prefix the character ch to the string str
578 * Increase length
579 * Set the has_prefix flag
580 */
581 #define PREFIX( str, length, ch ) *--str = ch ; length++ ; has_prefix = YES
582
583
584 /*
585 * Do format conversion placing the output in buffer
586 */
587 static int format_converter(register buffy * odp, const char *fmt, va_list ap) /* {{{ */
588 {
589 char *sp;
590 char *bep;
591 int cc = 0;
592 int i;
593
594 char *s = NULL;
595 int s_len, free_zcopy;
596 zval *zvp, zcopy;
597
598 int min_width = 0;
599 int precision = 0;
600 enum {
601 LEFT, RIGHT
602 } adjust;
603 char pad_char;
604 char prefix_char;
605
606 double fp_num;
607 wide_int i_num = (wide_int) 0;
608 u_wide_int ui_num;
609
610 char num_buf[NUM_BUF_SIZE];
611 char char_buf[2]; /* for printing %% and %<unknown> */
612
613 #ifdef HAVE_LOCALE_H
614 #ifdef ZTS
615 struct lconv lconv;
616 #else
617 struct lconv *lconv = NULL;
618 #endif
619 #endif
620
621 /*
622 * Flag variables
623 */
624 length_modifier_e modifier;
625 boolean_e alternate_form;
626 boolean_e print_sign;
627 boolean_e print_blank;
628 boolean_e adjust_precision;
629 boolean_e adjust_width;
630 bool_int is_negative;
631
632 sp = odp->nextb;
633 bep = odp->buf_end;
634
635 while (*fmt) {
636 if (*fmt != '%') {
637 INS_CHAR(*fmt, sp, bep, cc);
638 } else {
639 /*
640 * Default variable settings
641 */
642 adjust = RIGHT;
643 alternate_form = print_sign = print_blank = NO;
644 pad_char = ' ';
645 prefix_char = NUL;
646 free_zcopy = 0;
647
648 fmt++;
649
650 /*
651 * Try to avoid checking for flags, width or precision
652 */
653 if (isascii((int)*fmt) && !islower((int)*fmt)) {
654 /*
655 * Recognize flags: -, #, BLANK, +
656 */
657 for (;; fmt++) {
658 if (*fmt == '-')
659 adjust = LEFT;
660 else if (*fmt == '+')
661 print_sign = YES;
662 else if (*fmt == '#')
663 alternate_form = YES;
664 else if (*fmt == ' ')
665 print_blank = YES;
666 else if (*fmt == '0')
667 pad_char = '0';
668 else
669 break;
670 }
671
672 /*
673 * Check if a width was specified
674 */
675 if (isdigit((int)*fmt)) {
676 STR_TO_DEC(fmt, min_width);
677 adjust_width = YES;
678 } else if (*fmt == '*') {
679 min_width = va_arg(ap, int);
680 fmt++;
681 adjust_width = YES;
682 if (min_width < 0) {
683 adjust = LEFT;
684 min_width = -min_width;
685 }
686 } else
687 adjust_width = NO;
688
689 /*
690 * Check if a precision was specified
691 */
692 if (*fmt == '.') {
693 adjust_precision = YES;
694 fmt++;
695 if (isdigit((int)*fmt)) {
696 STR_TO_DEC(fmt, precision);
697 } else if (*fmt == '*') {
698 precision = va_arg(ap, int);
699 fmt++;
700 if (precision < 0)
701 precision = 0;
702 } else
703 precision = 0;
704
705 if (precision > FORMAT_CONV_MAX_PRECISION) {
706 precision = FORMAT_CONV_MAX_PRECISION;
707 }
708 } else
709 adjust_precision = NO;
710 } else
711 adjust_precision = adjust_width = NO;
712
713 /*
714 * Modifier check
715 */
716 switch (*fmt) {
717 case 'L':
718 fmt++;
719 modifier = LM_LONG_DOUBLE;
720 break;
721 case 'I':
722 fmt++;
723 #if SIZEOF_LONG_LONG
724 if (*fmt == '6' && *(fmt+1) == '4') {
725 fmt += 2;
726 modifier = LM_LONG_LONG;
727 } else
728 #endif
729 if (*fmt == '3' && *(fmt+1) == '2') {
730 fmt += 2;
731 modifier = LM_LONG;
732 } else {
733 #ifdef _WIN64
734 modifier = LM_LONG_LONG;
735 #else
736 modifier = LM_LONG;
737 #endif
738 }
739 break;
740 case 'l':
741 fmt++;
742 #if SIZEOF_LONG_LONG
743 if (*fmt == 'l') {
744 fmt++;
745 modifier = LM_LONG_LONG;
746 } else
747 #endif
748 modifier = LM_LONG;
749 break;
750 case 'z':
751 fmt++;
752 modifier = LM_SIZE_T;
753 break;
754 case 'j':
755 fmt++;
756 #if SIZEOF_INTMAX_T
757 modifier = LM_INTMAX_T;
758 #else
759 modifier = LM_SIZE_T;
760 #endif
761 break;
762 case 't':
763 fmt++;
764 #if SIZEOF_PTRDIFF_T
765 modifier = LM_PTRDIFF_T;
766 #else
767 modifier = LM_SIZE_T;
768 #endif
769 break;
770 case 'h':
771 fmt++;
772 if (*fmt == 'h') {
773 fmt++;
774 }
775 /* these are promoted to int, so no break */
776 default:
777 modifier = LM_STD;
778 break;
779 }
780
781 /*
782 * Argument extraction and printing.
783 * First we determine the argument type.
784 * Then, we convert the argument to a string.
785 * On exit from the switch, s points to the string that
786 * must be printed, s_len has the length of the string
787 * The precision requirements, if any, are reflected in s_len.
788 *
789 * NOTE: pad_char may be set to '0' because of the 0 flag.
790 * It is reset to ' ' by non-numeric formats
791 */
792 switch (*fmt) {
793 case 'Z':
794 zvp = (zval*) va_arg(ap, zval*);
795 zend_make_printable_zval(zvp, &zcopy, &free_zcopy);
796 if (free_zcopy) {
797 zvp = &zcopy;
798 }
799 s_len = Z_STRLEN_P(zvp);
800 s = Z_STRVAL_P(zvp);
801 if (adjust_precision && precision < s_len) {
802 s_len = precision;
803 }
804 break;
805 case 'u':
806 switch(modifier) {
807 default:
808 i_num = (wide_int) va_arg(ap, unsigned int);
809 break;
810 case LM_LONG_DOUBLE:
811 goto fmt_error;
812 case LM_LONG:
813 i_num = (wide_int) va_arg(ap, unsigned long int);
814 break;
815 case LM_SIZE_T:
816 i_num = (wide_int) va_arg(ap, size_t);
817 break;
818 #if SIZEOF_LONG_LONG
819 case LM_LONG_LONG:
820 i_num = (wide_int) va_arg(ap, u_wide_int);
821 break;
822 #endif
823 #if SIZEOF_INTMAX_T
824 case LM_INTMAX_T:
825 i_num = (wide_int) va_arg(ap, uintmax_t);
826 break;
827 #endif
828 #if SIZEOF_PTRDIFF_T
829 case LM_PTRDIFF_T:
830 i_num = (wide_int) va_arg(ap, ptrdiff_t);
831 break;
832 #endif
833 }
834 /*
835 * The rest also applies to other integer formats, so fall
836 * into that case.
837 */
838 case 'd':
839 case 'i':
840 /*
841 * Get the arg if we haven't already.
842 */
843 if ((*fmt) != 'u') {
844 switch(modifier) {
845 default:
846 i_num = (wide_int) va_arg(ap, int);
847 break;
848 case LM_LONG_DOUBLE:
849 goto fmt_error;
850 case LM_LONG:
851 i_num = (wide_int) va_arg(ap, long int);
852 break;
853 case LM_SIZE_T:
854 #if SIZEOF_SSIZE_T
855 i_num = (wide_int) va_arg(ap, ssize_t);
856 #else
857 i_num = (wide_int) va_arg(ap, size_t);
858 #endif
859 break;
860 #if SIZEOF_LONG_LONG
861 case LM_LONG_LONG:
862 i_num = (wide_int) va_arg(ap, wide_int);
863 break;
864 #endif
865 #if SIZEOF_INTMAX_T
866 case LM_INTMAX_T:
867 i_num = (wide_int) va_arg(ap, intmax_t);
868 break;
869 #endif
870 #if SIZEOF_PTRDIFF_T
871 case LM_PTRDIFF_T:
872 i_num = (wide_int) va_arg(ap, ptrdiff_t);
873 break;
874 #endif
875 }
876 }
877 s = ap_php_conv_10(i_num, (*fmt) == 'u', &is_negative,
878 &num_buf[NUM_BUF_SIZE], &s_len);
879 FIX_PRECISION(adjust_precision, precision, s, s_len);
880
881 if (*fmt != 'u') {
882 if (is_negative) {
883 prefix_char = '-';
884 } else if (print_sign) {
885 prefix_char = '+';
886 } else if (print_blank) {
887 prefix_char = ' ';
888 }
889 }
890 break;
891
892
893 case 'o':
894 switch(modifier) {
895 default:
896 ui_num = (u_wide_int) va_arg(ap, unsigned int);
897 break;
898 case LM_LONG_DOUBLE:
899 goto fmt_error;
900 case LM_LONG:
901 ui_num = (u_wide_int) va_arg(ap, unsigned long int);
902 break;
903 case LM_SIZE_T:
904 ui_num = (u_wide_int) va_arg(ap, size_t);
905 break;
906 #if SIZEOF_LONG_LONG
907 case LM_LONG_LONG:
908 ui_num = (u_wide_int) va_arg(ap, u_wide_int);
909 break;
910 #endif
911 #if SIZEOF_INTMAX_T
912 case LM_INTMAX_T:
913 ui_num = (u_wide_int) va_arg(ap, uintmax_t);
914 break;
915 #endif
916 #if SIZEOF_PTRDIFF_T
917 case LM_PTRDIFF_T:
918 ui_num = (u_wide_int) va_arg(ap, ptrdiff_t);
919 break;
920 #endif
921 }
922 s = ap_php_conv_p2(ui_num, 3, *fmt, &num_buf[NUM_BUF_SIZE], &s_len);
923 FIX_PRECISION(adjust_precision, precision, s, s_len);
924 if (alternate_form && *s != '0') {
925 *--s = '0';
926 s_len++;
927 }
928 break;
929
930
931 case 'x':
932 case 'X':
933 switch(modifier) {
934 default:
935 ui_num = (u_wide_int) va_arg(ap, unsigned int);
936 break;
937 case LM_LONG_DOUBLE:
938 goto fmt_error;
939 case LM_LONG:
940 ui_num = (u_wide_int) va_arg(ap, unsigned long int);
941 break;
942 case LM_SIZE_T:
943 ui_num = (u_wide_int) va_arg(ap, size_t);
944 break;
945 #if SIZEOF_LONG_LONG
946 case LM_LONG_LONG:
947 ui_num = (u_wide_int) va_arg(ap, u_wide_int);
948 break;
949 #endif
950 #if SIZEOF_INTMAX_T
951 case LM_INTMAX_T:
952 ui_num = (u_wide_int) va_arg(ap, uintmax_t);
953 break;
954 #endif
955 #if SIZEOF_PTRDIFF_T
956 case LM_PTRDIFF_T:
957 ui_num = (u_wide_int) va_arg(ap, ptrdiff_t);
958 break;
959 #endif
960 }
961 s = ap_php_conv_p2(ui_num, 4, *fmt, &num_buf[NUM_BUF_SIZE], &s_len);
962 FIX_PRECISION(adjust_precision, precision, s, s_len);
963 if (alternate_form && i_num != 0) {
964 *--s = *fmt; /* 'x' or 'X' */
965 *--s = '0';
966 s_len += 2;
967 }
968 break;
969
970
971 case 's':
972 case 'v':
973 s = va_arg(ap, char *);
974 if (s != NULL) {
975 s_len = strlen(s);
976 if (adjust_precision && precision < s_len) {
977 s_len = precision;
978 }
979 } else {
980 s = S_NULL;
981 s_len = S_NULL_LEN;
982 }
983 pad_char = ' ';
984 break;
985
986
987 case 'f':
988 case 'F':
989 case 'e':
990 case 'E':
991 switch(modifier) {
992 case LM_LONG_DOUBLE:
993 fp_num = (double) va_arg(ap, long double);
994 break;
995 case LM_STD:
996 fp_num = va_arg(ap, double);
997 break;
998 default:
999 goto fmt_error;
1000 }
1001
1002 if (zend_isnan(fp_num)) {
1003 s = "NAN";
1004 s_len = 3;
1005 } else if (zend_isinf(fp_num)) {
1006 s = "INF";
1007 s_len = 3;
1008 } else {
1009 #ifdef HAVE_LOCALE_H
1010 #ifdef ZTS
1011 localeconv_r(&lconv);
1012 #else
1013 if (!lconv) {
1014 lconv = localeconv();
1015 }
1016 #endif
1017 #endif
1018 s = php_conv_fp((*fmt == 'f')?'F':*fmt, fp_num, alternate_form,
1019 (adjust_precision == NO) ? FLOAT_DIGITS : precision,
1020 (*fmt == 'f')?LCONV_DECIMAL_POINT:'.',
1021 &is_negative, &num_buf[1], &s_len);
1022 if (is_negative)
1023 prefix_char = '-';
1024 else if (print_sign)
1025 prefix_char = '+';
1026 else if (print_blank)
1027 prefix_char = ' ';
1028 }
1029 break;
1030
1031
1032 case 'g':
1033 case 'k':
1034 case 'G':
1035 case 'H':
1036 switch(modifier) {
1037 case LM_LONG_DOUBLE:
1038 fp_num = (double) va_arg(ap, long double);
1039 break;
1040 case LM_STD:
1041 fp_num = va_arg(ap, double);
1042 break;
1043 default:
1044 goto fmt_error;
1045 }
1046
1047 if (zend_isnan(fp_num)) {
1048 s = "NAN";
1049 s_len = 3;
1050 break;
1051 } else if (zend_isinf(fp_num)) {
1052 if (fp_num > 0) {
1053 s = "INF";
1054 s_len = 3;
1055 } else {
1056 s = "-INF";
1057 s_len = 4;
1058 }
1059 break;
1060 }
1061
1062 if (adjust_precision == NO) {
1063 precision = FLOAT_DIGITS;
1064 } else if (precision == 0) {
1065 precision = 1;
1066 }
1067 /*
1068 * * We use &num_buf[ 1 ], so that we have room for the sign
1069 */
1070 #ifdef HAVE_LOCALE_H
1071 #ifdef ZTS
1072 localeconv_r(&lconv);
1073 #else
1074 if (!lconv) {
1075 lconv = localeconv();
1076 }
1077 #endif
1078 #endif
1079 s = php_gcvt(fp_num, precision, (*fmt=='H' || *fmt == 'k') ? '.' : LCONV_DECIMAL_POINT, (*fmt == 'G' || *fmt == 'H')?'E':'e', &num_buf[1]);
1080 if (*s == '-') {
1081 prefix_char = *s++;
1082 } else if (print_sign) {
1083 prefix_char = '+';
1084 } else if (print_blank) {
1085 prefix_char = ' ';
1086 }
1087
1088 s_len = strlen(s);
1089
1090 if (alternate_form && (strchr(s, '.')) == NULL) {
1091 s[s_len++] = '.';
1092 }
1093 break;
1094
1095
1096 case 'c':
1097 char_buf[0] = (char) (va_arg(ap, int));
1098 s = &char_buf[0];
1099 s_len = 1;
1100 pad_char = ' ';
1101 break;
1102
1103
1104 case '%':
1105 char_buf[0] = '%';
1106 s = &char_buf[0];
1107 s_len = 1;
1108 pad_char = ' ';
1109 break;
1110
1111
1112 case 'n':
1113 *(va_arg(ap, int *)) = cc;
1114 goto skip_output;
1115
1116 /*
1117 * Always extract the argument as a "char *" pointer. We
1118 * should be using "void *" but there are still machines
1119 * that don't understand it.
1120 * If the pointer size is equal to the size of an unsigned
1121 * integer we convert the pointer to a hex number, otherwise
1122 * we print "%p" to indicate that we don't handle "%p".
1123 */
1124 case 'p':
1125 if (sizeof(char *) <= sizeof(u_wide_int)) {
1126 ui_num = (u_wide_int)((size_t) va_arg(ap, char *));
1127 s = ap_php_conv_p2(ui_num, 4, 'x',
1128 &num_buf[NUM_BUF_SIZE], &s_len);
1129 if (ui_num != 0) {
1130 *--s = 'x';
1131 *--s = '0';
1132 s_len += 2;
1133 }
1134 } else {
1135 s = "%p";
1136 s_len = 2;
1137 }
1138 pad_char = ' ';
1139 break;
1140
1141
1142 case NUL:
1143 /*
1144 * The last character of the format string was %.
1145 * We ignore it.
1146 */
1147 continue;
1148
1149
1150 fmt_error:
1151 php_error(E_ERROR, "Illegal length modifier specified '%c' in s[np]printf call", *fmt);
1152 /*
1153 * The default case is for unrecognized %'s.
1154 * We print %<char> to help the user identify what
1155 * option is not understood.
1156 * This is also useful in case the user wants to pass
1157 * the output of format_converter to another function
1158 * that understands some other %<char> (like syslog).
1159 * Note that we can't point s inside fmt because the
1160 * unknown <char> could be preceded by width etc.
1161 */
1162 default:
1163 char_buf[0] = '%';
1164 char_buf[1] = *fmt;
1165 s = char_buf;
1166 s_len = 2;
1167 pad_char = ' ';
1168 break;
1169 }
1170
1171 if (prefix_char != NUL) {
1172 *--s = prefix_char;
1173 s_len++;
1174 }
1175 if (adjust_width && adjust == RIGHT && min_width > s_len) {
1176 if (pad_char == '0' && prefix_char != NUL) {
1177 INS_CHAR(*s, sp, bep, cc)
1178 s++;
1179 s_len--;
1180 min_width--;
1181 }
1182 PAD(min_width, s_len, pad_char);
1183 }
1184 /*
1185 * Print the string s.
1186 */
1187 for (i = s_len; i != 0; i--) {
1188 INS_CHAR(*s, sp, bep, cc);
1189 s++;
1190 }
1191
1192 if (adjust_width && adjust == LEFT && min_width > s_len)
1193 PAD(min_width, s_len, pad_char);
1194 if (free_zcopy) {
1195 zval_dtor(&zcopy);
1196 }
1197 }
1198 skip_output:
1199 fmt++;
1200 }
1201 odp->nextb = sp;
1202 return (cc);
1203 }
1204 /* }}} */
1205
1206 /*
1207 * This is the general purpose conversion function.
1208 */
1209 static void strx_printv(int *ccp, char *buf, size_t len, const char *format, va_list ap) /* {{{ */
1210 {
1211 buffy od;
1212 int cc;
1213
1214 /*
1215 * First initialize the descriptor
1216 * Notice that if no length is given, we initialize buf_end to the
1217 * highest possible address.
1218 */
1219 if (len == 0) {
1220 od.buf_end = (char *) ~0;
1221 od.nextb = (char *) ~0;
1222 } else {
1223 od.buf_end = &buf[len-1];
1224 od.nextb = buf;
1225 }
1226
1227 /*
1228 * Do the conversion
1229 */
1230 cc = format_converter(&od, format, ap);
1231 if (len != 0 && od.nextb <= od.buf_end) {
1232 *(od.nextb) = '\0';
1233 }
1234 if (ccp) {
1235 *ccp = cc;
1236 }
1237 }
1238 /* }}} */
1239
1240 PHPAPI int ap_php_slprintf(char *buf, size_t len, const char *format,...) /* {{{ */
1241 {
1242 unsigned int cc;
1243 va_list ap;
1244
1245 va_start(ap, format);
1246 strx_printv(&cc, buf, len, format, ap);
1247 va_end(ap);
1248 if (cc >= len) {
1249 cc = len -1;
1250 buf[cc] = '\0';
1251 }
1252 return cc;
1253 }
1254 /* }}} */
1255
1256 PHPAPI int ap_php_vslprintf(char *buf, size_t len, const char *format, va_list ap) /* {{{ */
1257 {
1258 unsigned int cc;
1259
1260 strx_printv(&cc, buf, len, format, ap);
1261 if (cc >= len) {
1262 cc = len -1;
1263 buf[cc] = '\0';
1264 }
1265 return cc;
1266 }
1267 /* }}} */
1268
1269 PHPAPI int ap_php_snprintf(char *buf, size_t len, const char *format,...) /* {{{ */
1270 {
1271 int cc;
1272 va_list ap;
1273
1274 va_start(ap, format);
1275 strx_printv(&cc, buf, len, format, ap);
1276 va_end(ap);
1277 return (cc);
1278 }
1279 /* }}} */
1280
1281 PHPAPI int ap_php_vsnprintf(char *buf, size_t len, const char *format, va_list ap) /* {{{ */
1282 {
1283 int cc;
1284
1285 strx_printv(&cc, buf, len, format, ap);
1286 return (cc);
1287 }
1288 /* }}} */
1289
1290 PHPAPI int ap_php_vasprintf(char **buf, const char *format, va_list ap) /* {{{ */
1291 {
1292 va_list ap2;
1293 int cc;
1294
1295 va_copy(ap2, ap);
1296 cc = ap_php_vsnprintf(NULL, 0, format, ap2);
1297 va_end(ap2);
1298
1299 *buf = NULL;
1300
1301 if (cc >= 0) {
1302 if ((*buf = malloc(++cc)) != NULL) {
1303 if ((cc = ap_php_vsnprintf(*buf, cc, format, ap)) < 0) {
1304 free(*buf);
1305 *buf = NULL;
1306 }
1307 }
1308 }
1309
1310 return cc;
1311 }
1312 /* }}} */
1313
1314 PHPAPI int ap_php_asprintf(char **buf, const char *format, ...) /* {{{ */
1315 {
1316 int cc;
1317 va_list ap;
1318
1319 va_start(ap, format);
1320 cc = vasprintf(buf, format, ap);
1321 va_end(ap);
1322 return cc;
1323 }
1324 /* }}} */
1325
1326 /*
1327 * Local variables:
1328 * tab-width: 4
1329 * c-basic-offset: 4
1330 * End:
1331 * vim600: sw=4 ts=4 fdm=marker
1332 * vim<600: sw=4 ts=4
1333 */