1/* 2 +----------------------------------------------------------------------+ 3 | PHP Version 5 | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) 1997-2013 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#define LCONV_DECIMAL_POINT (*lconv->decimal_point) 42#else 43#define LCONV_DECIMAL_POINT '.' 44#endif 45 46/* 47 * Copyright (c) 2002, 2006 Todd C. Miller <Todd.Miller@courtesan.com> 48 * 49 * Permission to use, copy, modify, and distribute this software for any 50 * purpose with or without fee is hereby granted, provided that the above 51 * copyright notice and this permission notice appear in all copies. 52 * 53 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 54 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 55 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 56 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 57 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 58 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 59 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 60 * 61 * Sponsored in part by the Defense Advanced Research Projects 62 * Agency (DARPA) and Air Force Research Laboratory, Air Force 63 * Materiel Command, USAF, under agreement number F39502-99-1-0512. 64 */ 65 66static char * __cvt(double value, int ndigit, int *decpt, int *sign, int fmode, int pad) /* {{{ */ 67{ 68 register char *s = NULL; 69 char *p, *rve, c; 70 size_t siz; 71 72 if (ndigit < 0) { 73 siz = -ndigit + 1; 74 } else { 75 siz = ndigit + 1; 76 } 77 78 /* __dtoa() doesn't allocate space for 0 so we do it by hand */ 79 if (value == 0.0) { 80 *decpt = 1 - fmode; /* 1 for 'e', 0 for 'f' */ 81 *sign = 0; 82 if ((rve = s = (char *)malloc(ndigit?siz:2)) == NULL) { 83 return(NULL); 84 } 85 *rve++ = '0'; 86 *rve = '\0'; 87 if (!ndigit) { 88 return(s); 89 } 90 } else { 91 p = zend_dtoa(value, fmode + 2, ndigit, decpt, sign, &rve); 92 if (*decpt == 9999) { 93 /* Infinity or Nan, convert to inf or nan like printf */ 94 *decpt = 0; 95 c = *p; 96 zend_freedtoa(p); 97 return strdup((c == 'I' ? "INF" : "NAN")); 98 } 99 /* Make a local copy and adjust rve to be in terms of s */ 100 if (pad && fmode) { 101 siz += *decpt; 102 } 103 if ((s = (char *)malloc(siz+1)) == NULL) { 104 zend_freedtoa(p); 105 return(NULL); 106 } 107 (void) strlcpy(s, p, siz); 108 rve = s + (rve - p); 109 zend_freedtoa(p); 110 } 111 112 /* Add trailing zeros */ 113 if (pad) { 114 siz -= rve - s; 115 while (--siz) { 116 *rve++ = '0'; 117 } 118 *rve = '\0'; 119 } 120 121 return(s); 122} 123/* }}} */ 124 125static inline char *php_ecvt(double value, int ndigit, int *decpt, int *sign) /* {{{ */ 126{ 127 return(__cvt(value, ndigit, decpt, sign, 0, 1)); 128} 129/* }}} */ 130 131static inline char *php_fcvt(double value, int ndigit, int *decpt, int *sign) /* {{{ */ 132{ 133 return(__cvt(value, ndigit, decpt, sign, 1, 1)); 134} 135/* }}} */ 136 137PHPAPI char *php_gcvt(double value, int ndigit, char dec_point, char exponent, char *buf) /* {{{ */ 138{ 139 char *digits, *dst, *src; 140 int i, decpt, sign; 141 142 digits = zend_dtoa(value, 2, ndigit, &decpt, &sign, NULL); 143 if (decpt == 9999) { 144 /* 145 * Infinity or NaN, convert to inf or nan with sign. 146 * We assume the buffer is at least ndigit long. 147 */ 148 snprintf(buf, ndigit + 1, "%s%s", (sign && *digits == 'I') ? "-" : "", *digits == 'I' ? "INF" : "NAN"); 149 zend_freedtoa(digits); 150 return (buf); 151 } 152 153 dst = buf; 154 if (sign) { 155 *dst++ = '-'; 156 } 157 158 if ((decpt >= 0 && decpt > ndigit) || decpt < -3) { /* use E-style */ 159 /* exponential format (e.g. 1.2345e+13) */ 160 if (--decpt < 0) { 161 sign = 1; 162 decpt = -decpt; 163 } else { 164 sign = 0; 165 } 166 src = digits; 167 *dst++ = *src++; 168 *dst++ = dec_point; 169 if (*src == '\0') { 170 *dst++ = '0'; 171 } else { 172 do { 173 *dst++ = *src++; 174 } while (*src != '\0'); 175 } 176 *dst++ = exponent; 177 if (sign) { 178 *dst++ = '-'; 179 } else { 180 *dst++ = '+'; 181 } 182 if (decpt < 10) { 183 *dst++ = '0' + decpt; 184 *dst = '\0'; 185 } else { 186 /* XXX - optimize */ 187 for (sign = decpt, i = 0; (sign /= 10) != 0; i++) 188 continue; 189 dst[i + 1] = '\0'; 190 while (decpt != 0) { 191 dst[i--] = '0' + decpt % 10; 192 decpt /= 10; 193 } 194 } 195 } else if (decpt < 0) { 196 /* standard format 0. */ 197 *dst++ = '0'; /* zero before decimal point */ 198 *dst++ = dec_point; 199 do { 200 *dst++ = '0'; 201 } while (++decpt < 0); 202 src = digits; 203 while (*src != '\0') { 204 *dst++ = *src++; 205 } 206 *dst = '\0'; 207 } else { 208 /* standard format */ 209 for (i = 0, src = digits; i < decpt; i++) { 210 if (*src != '\0') { 211 *dst++ = *src++; 212 } else { 213 *dst++ = '0'; 214 } 215 } 216 if (*src != '\0') { 217 if (src == digits) { 218 *dst++ = '0'; /* zero before decimal point */ 219 } 220 *dst++ = dec_point; 221 for (i = decpt; digits[i] != '\0'; i++) { 222 *dst++ = digits[i]; 223 } 224 } 225 *dst = '\0'; 226 } 227 zend_freedtoa(digits); 228 return (buf); 229} 230/* }}} */ 231 232/* {{{ Apache license */ 233/* ==================================================================== 234 * Copyright (c) 1995-1998 The Apache Group. All rights reserved. 235 * 236 * Redistribution and use in source and binary forms, with or without 237 * modification, are permitted provided that the following conditions 238 * are met: 239 * 240 * 1. Redistributions of source code must retain the above copyright 241 * notice, this list of conditions and the following disclaimer. 242 * 243 * 2. Redistributions in binary form must reproduce the above copyright 244 * notice, this list of conditions and the following disclaimer in 245 * the documentation and/or other materials provided with the 246 * distribution. 247 * 248 * 3. All advertising materials mentioning features or use of this 249 * software must display the following acknowledgment: 250 * "This product includes software developed by the Apache Group 251 * for use in the Apache HTTP server project (http://www.apache.org/)." 252 * 253 * 4. The names "Apache Server" and "Apache Group" must not be used to 254 * endorse or promote products derived from this software without 255 * prior written permission. 256 * 257 * 5. Redistributions of any form whatsoever must retain the following 258 * 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 * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY 263 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 264 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 265 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR 266 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 267 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 268 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 269 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 270 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 271 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 272 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 273 * OF THE POSSIBILITY OF SUCH DAMAGE. 274 * ==================================================================== 275 * 276 * This software consists of voluntary contributions made by many 277 * individuals on behalf of the Apache Group and was originally based 278 * on public domain software written at the National Center for 279 * Supercomputing Applications, University of Illinois, Urbana-Champaign. 280 * For more information on the Apache Group and the Apache HTTP server 281 * project, please see <http://www.apache.org/>. 282 * 283 * This code is based on, and used with the permission of, the 284 * SIO stdio-replacement strx_* functions by Panos Tsirigotis 285 * <panos@alumni.cs.colorado.edu> for xinetd. 286 */ 287/* }}} */ 288 289#define FALSE 0 290#define TRUE 1 291#define NUL '\0' 292#define INT_NULL ((int *)0) 293 294#define S_NULL "(null)" 295#define S_NULL_LEN 6 296 297#define FLOAT_DIGITS 6 298#define EXPONENT_LENGTH 10 299 300 301/* 302 * Convert num to its decimal format. 303 * Return value: 304 * - a pointer to a string containing the number (no sign) 305 * - len contains the length of the string 306 * - is_negative is set to TRUE or FALSE depending on the sign 307 * of the number (always set to FALSE if is_unsigned is TRUE) 308 * 309 * The caller provides a buffer for the string: that is the buf_end argument 310 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer 311 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ]) 312 */ 313/* char * ap_php_conv_10() {{{ */ 314char * ap_php_conv_10(register wide_int num, register bool_int is_unsigned, 315 register bool_int * is_negative, char *buf_end, register int *len) 316{ 317 register char *p = buf_end; 318 register u_wide_int magnitude; 319 320 if (is_unsigned) { 321 magnitude = (u_wide_int) num; 322 *is_negative = FALSE; 323 } else { 324 *is_negative = (num < 0); 325 326 /* 327 * On a 2's complement machine, negating the most negative integer 328 * results in a number that cannot be represented as a signed integer. 329 * Here is what we do to obtain the number's magnitude: 330 * a. add 1 to the number 331 * b. negate it (becomes positive) 332 * c. convert it to unsigned 333 * d. add 1 334 */ 335 if (*is_negative) { 336 wide_int t = num + 1; 337 magnitude = ((u_wide_int) - t) + 1; 338 } else { 339 magnitude = (u_wide_int) num; 340 } 341 } 342 343 /* 344 * We use a do-while loop so that we write at least 1 digit 345 */ 346 do { 347 register u_wide_int new_magnitude = magnitude / 10; 348 349 *--p = (char)(magnitude - new_magnitude * 10 + '0'); 350 magnitude = new_magnitude; 351 } 352 while (magnitude); 353 354 *len = buf_end - p; 355 return (p); 356} 357/* }}} */ 358 359/* If you change this value then also change bug24640.phpt. 360 * Also NDIG must be reasonable smaller than NUM_BUF_SIZE. 361 */ 362#define NDIG 320 363 364 365/* 366 * Convert a floating point number to a string formats 'f', 'e' or 'E'. 367 * The result is placed in buf, and len denotes the length of the string 368 * The sign is returned in the is_negative argument (and is not placed 369 * in buf). 370 */ 371/* PHPAPI char * php_conv_fp() {{{ */ 372PHPAPI char * php_conv_fp(register char format, register double num, 373 boolean_e add_dp, int precision, char dec_point, bool_int * is_negative, char *buf, int *len) 374{ 375 register char *s = buf; 376 register char *p, *p_orig; 377 int decimal_point; 378 379 if (precision >= NDIG - 1) { 380 precision = NDIG - 2; 381 } 382 383 if (format == 'F') { 384 p_orig = p = php_fcvt(num, precision, &decimal_point, is_negative); 385 } else { /* either e or E format */ 386 p_orig = p = php_ecvt(num, precision + 1, &decimal_point, is_negative); 387 } 388 389 /* 390 * Check for Infinity and NaN 391 */ 392 if (isalpha((int)*p)) { 393 *len = strlen(p); 394 memcpy(buf, p, *len + 1); 395 *is_negative = FALSE; 396 free(p_orig); 397 return (buf); 398 } 399 if (format == 'F') { 400 if (decimal_point <= 0) { 401 if (num != 0 || precision > 0) { 402 *s++ = '0'; 403 if (precision > 0) { 404 *s++ = dec_point; 405 while (decimal_point++ < 0) { 406 *s++ = '0'; 407 } 408 } else if (add_dp) { 409 *s++ = dec_point; 410 } 411 } 412 } else { 413 int addz = decimal_point >= NDIG ? decimal_point - NDIG + 1 : 0; 414 decimal_point -= addz; 415 while (decimal_point-- > 0) { 416 *s++ = *p++; 417 } 418 while (addz-- > 0) { 419 *s++ = '0'; 420 } 421 if (precision > 0 || add_dp) { 422 *s++ = dec_point; 423 } 424 } 425 } else { 426 *s++ = *p++; 427 if (precision > 0 || add_dp) { 428 *s++ = '.'; 429 } 430 } 431 432 /* 433 * copy the rest of p, the NUL is NOT copied 434 */ 435 while (*p) { 436 *s++ = *p++; 437 } 438 439 if (format != 'F') { 440 char temp[EXPONENT_LENGTH]; /* for exponent conversion */ 441 int t_len; 442 bool_int exponent_is_negative; 443 444 *s++ = format; /* either e or E */ 445 decimal_point--; 446 if (decimal_point != 0) { 447 p = ap_php_conv_10((wide_int) decimal_point, FALSE, &exponent_is_negative, &temp[EXPONENT_LENGTH], &t_len); 448 *s++ = exponent_is_negative ? '-' : '+'; 449 450 /* 451 * Make sure the exponent has at least 2 digits 452 */ 453 while (t_len--) { 454 *s++ = *p++; 455 } 456 } else { 457 *s++ = '+'; 458 *s++ = '0'; 459 } 460 } 461 *len = s - buf; 462 free(p_orig); 463 return (buf); 464} 465/* }}} */ 466 467/* 468 * Convert num to a base X number where X is a power of 2. nbits determines X. 469 * For example, if nbits is 3, we do base 8 conversion 470 * Return value: 471 * a pointer to a string containing the number 472 * 473 * The caller provides a buffer for the string: that is the buf_end argument 474 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer 475 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ]) 476 */ 477char * ap_php_conv_p2(register u_wide_int num, register int nbits, char format, char *buf_end, register int *len) /* {{{ */ 478{ 479 register int mask = (1 << nbits) - 1; 480 register char *p = buf_end; 481 static char low_digits[] = "0123456789abcdef"; 482 static char upper_digits[] = "0123456789ABCDEF"; 483 register char *digits = (format == 'X') ? upper_digits : low_digits; 484 485 do { 486 *--p = digits[num & mask]; 487 num >>= nbits; 488 } 489 while (num); 490 491 *len = buf_end - p; 492 return (p); 493} 494/* }}} */ 495 496/* 497 * NUM_BUF_SIZE is the size of the buffer used for arithmetic conversions 498 * 499 * XXX: this is a magic number; do not decrease it 500 * Emax = 1023 501 * NDIG = 320 502 * NUM_BUF_SIZE >= strlen("-") + Emax + strlrn(".") + NDIG + strlen("E+1023") + 1; 503 */ 504#define NUM_BUF_SIZE 2048 505 506 507/* 508 * Descriptor for buffer area 509 */ 510struct buf_area { 511 char *buf_end; 512 char *nextb; /* pointer to next byte to read/write */ 513}; 514 515typedef struct buf_area buffy; 516 517/* 518 * The INS_CHAR macro inserts a character in the buffer and writes 519 * the buffer back to disk if necessary 520 * It uses the char pointers sp and bep: 521 * sp points to the next available character in the buffer 522 * bep points to the end-of-buffer+1 523 * While using this macro, note that the nextb pointer is NOT updated. 524 * 525 * NOTE: Evaluation of the c argument should not have any side-effects 526 */ 527#define INS_CHAR(c, sp, bep, cc) \ 528 { \ 529 if (sp < bep) \ 530 { \ 531 *sp++ = c; \ 532 } \ 533 cc++; \ 534 } 535 536#define NUM( c ) ( c - '0' ) 537 538#define STR_TO_DEC( str, num ) \ 539 num = NUM( *str++ ) ; \ 540 while ( isdigit((int)*str ) ) \ 541 { \ 542 num *= 10 ; \ 543 num += NUM( *str++ ) ; \ 544 } 545 546/* 547 * This macro does zero padding so that the precision 548 * requirement is satisfied. The padding is done by 549 * adding '0's to the left of the string that is going 550 * to be printed. 551 */ 552#define FIX_PRECISION( adjust, precision, s, s_len ) \ 553 if ( adjust ) \ 554 while ( s_len < precision ) \ 555 { \ 556 *--s = '0' ; \ 557 s_len++ ; \ 558 } 559 560/* 561 * Macro that does padding. The padding is done by printing 562 * the character ch. 563 */ 564#define PAD( width, len, ch ) do \ 565 { \ 566 INS_CHAR( ch, sp, bep, cc ) ; \ 567 width-- ; \ 568 } \ 569 while ( width > len ) 570 571/* 572 * Prefix the character ch to the string str 573 * Increase length 574 * Set the has_prefix flag 575 */ 576#define PREFIX( str, length, ch ) *--str = ch ; length++ ; has_prefix = YES 577 578 579/* 580 * Do format conversion placing the output in buffer 581 */ 582static int format_converter(register buffy * odp, const char *fmt, va_list ap) /* {{{ */ 583{ 584 char *sp; 585 char *bep; 586 int cc = 0; 587 int i; 588 589 char *s = NULL; 590 int s_len, free_zcopy; 591 zval *zvp, zcopy; 592 593 int min_width = 0; 594 int precision = 0; 595 enum { 596 LEFT, RIGHT 597 } adjust; 598 char pad_char; 599 char prefix_char; 600 601 double fp_num; 602 wide_int i_num = (wide_int) 0; 603 u_wide_int ui_num; 604 605 char num_buf[NUM_BUF_SIZE]; 606 char char_buf[2]; /* for printing %% and %<unknown> */ 607 608#ifdef HAVE_LOCALE_H 609 struct lconv *lconv = NULL; 610#endif 611 612 /* 613 * Flag variables 614 */ 615 length_modifier_e modifier; 616 boolean_e alternate_form; 617 boolean_e print_sign; 618 boolean_e print_blank; 619 boolean_e adjust_precision; 620 boolean_e adjust_width; 621 bool_int is_negative; 622 623 sp = odp->nextb; 624 bep = odp->buf_end; 625 626 while (*fmt) { 627 if (*fmt != '%') { 628 INS_CHAR(*fmt, sp, bep, cc); 629 } else { 630 /* 631 * Default variable settings 632 */ 633 adjust = RIGHT; 634 alternate_form = print_sign = print_blank = NO; 635 pad_char = ' '; 636 prefix_char = NUL; 637 free_zcopy = 0; 638 639 fmt++; 640 641 /* 642 * Try to avoid checking for flags, width or precision 643 */ 644 if (isascii((int)*fmt) && !islower((int)*fmt)) { 645 /* 646 * Recognize flags: -, #, BLANK, + 647 */ 648 for (;; fmt++) { 649 if (*fmt == '-') 650 adjust = LEFT; 651 else if (*fmt == '+') 652 print_sign = YES; 653 else if (*fmt == '#') 654 alternate_form = YES; 655 else if (*fmt == ' ') 656 print_blank = YES; 657 else if (*fmt == '0') 658 pad_char = '0'; 659 else 660 break; 661 } 662 663 /* 664 * Check if a width was specified 665 */ 666 if (isdigit((int)*fmt)) { 667 STR_TO_DEC(fmt, min_width); 668 adjust_width = YES; 669 } else if (*fmt == '*') { 670 min_width = va_arg(ap, int); 671 fmt++; 672 adjust_width = YES; 673 if (min_width < 0) { 674 adjust = LEFT; 675 min_width = -min_width; 676 } 677 } else 678 adjust_width = NO; 679 680 /* 681 * Check if a precision was specified 682 */ 683 if (*fmt == '.') { 684 adjust_precision = YES; 685 fmt++; 686 if (isdigit((int)*fmt)) { 687 STR_TO_DEC(fmt, precision); 688 } else if (*fmt == '*') { 689 precision = va_arg(ap, int); 690 fmt++; 691 if (precision < 0) 692 precision = 0; 693 } else 694 precision = 0; 695 696 if (precision > FORMAT_CONV_MAX_PRECISION) { 697 precision = FORMAT_CONV_MAX_PRECISION; 698 } 699 } else 700 adjust_precision = NO; 701 } else 702 adjust_precision = adjust_width = NO; 703 704 /* 705 * Modifier check 706 */ 707 switch (*fmt) { 708 case 'L': 709 fmt++; 710 modifier = LM_LONG_DOUBLE; 711 break; 712 case 'I': 713 fmt++; 714#if SIZEOF_LONG_LONG 715 if (*fmt == '6' && *(fmt+1) == '4') { 716 fmt += 2; 717 modifier = LM_LONG_LONG; 718 } else 719#endif 720 if (*fmt == '3' && *(fmt+1) == '2') { 721 fmt += 2; 722 modifier = LM_LONG; 723 } else { 724#ifdef _WIN64 725 modifier = LM_LONG_LONG; 726#else 727 modifier = LM_LONG; 728#endif 729 } 730 break; 731 case 'l': 732 fmt++; 733#if SIZEOF_LONG_LONG 734 if (*fmt == 'l') { 735 fmt++; 736 modifier = LM_LONG_LONG; 737 } else 738#endif 739 modifier = LM_LONG; 740 break; 741 case 'z': 742 fmt++; 743 modifier = LM_SIZE_T; 744 break; 745 case 'j': 746 fmt++; 747#if SIZEOF_INTMAX_T 748 modifier = LM_INTMAX_T; 749#else 750 modifier = LM_SIZE_T; 751#endif 752 break; 753 case 't': 754 fmt++; 755#if SIZEOF_PTRDIFF_T 756 modifier = LM_PTRDIFF_T; 757#else 758 modifier = LM_SIZE_T; 759#endif 760 break; 761 case 'h': 762 fmt++; 763 if (*fmt == 'h') { 764 fmt++; 765 } 766 /* these are promoted to int, so no break */ 767 default: 768 modifier = LM_STD; 769 break; 770 } 771 772 /* 773 * Argument extraction and printing. 774 * First we determine the argument type. 775 * Then, we convert the argument to a string. 776 * On exit from the switch, s points to the string that 777 * must be printed, s_len has the length of the string 778 * The precision requirements, if any, are reflected in s_len. 779 * 780 * NOTE: pad_char may be set to '0' because of the 0 flag. 781 * It is reset to ' ' by non-numeric formats 782 */ 783 switch (*fmt) { 784 case 'Z': 785 zvp = (zval*) va_arg(ap, zval*); 786 zend_make_printable_zval(zvp, &zcopy, &free_zcopy); 787 if (free_zcopy) { 788 zvp = &zcopy; 789 } 790 s_len = Z_STRLEN_P(zvp); 791 s = Z_STRVAL_P(zvp); 792 if (adjust_precision && precision < s_len) { 793 s_len = precision; 794 } 795 break; 796 case 'u': 797 switch(modifier) { 798 default: 799 i_num = (wide_int) va_arg(ap, unsigned int); 800 break; 801 case LM_LONG_DOUBLE: 802 goto fmt_error; 803 case LM_LONG: 804 i_num = (wide_int) va_arg(ap, unsigned long int); 805 break; 806 case LM_SIZE_T: 807 i_num = (wide_int) va_arg(ap, size_t); 808 break; 809#if SIZEOF_LONG_LONG 810 case LM_LONG_LONG: 811 i_num = (wide_int) va_arg(ap, u_wide_int); 812 break; 813#endif 814#if SIZEOF_INTMAX_T 815 case LM_INTMAX_T: 816 i_num = (wide_int) va_arg(ap, uintmax_t); 817 break; 818#endif 819#if SIZEOF_PTRDIFF_T 820 case LM_PTRDIFF_T: 821 i_num = (wide_int) va_arg(ap, ptrdiff_t); 822 break; 823#endif 824 } 825 /* 826 * The rest also applies to other integer formats, so fall 827 * into that case. 828 */ 829 case 'd': 830 case 'i': 831 /* 832 * Get the arg if we haven't already. 833 */ 834 if ((*fmt) != 'u') { 835 switch(modifier) { 836 default: 837 i_num = (wide_int) va_arg(ap, int); 838 break; 839 case LM_LONG_DOUBLE: 840 goto fmt_error; 841 case LM_LONG: 842 i_num = (wide_int) va_arg(ap, long int); 843 break; 844 case LM_SIZE_T: 845#if SIZEOF_SSIZE_T 846 i_num = (wide_int) va_arg(ap, ssize_t); 847#else 848 i_num = (wide_int) va_arg(ap, size_t); 849#endif 850 break; 851#if SIZEOF_LONG_LONG 852 case LM_LONG_LONG: 853 i_num = (wide_int) va_arg(ap, wide_int); 854 break; 855#endif 856#if SIZEOF_INTMAX_T 857 case LM_INTMAX_T: 858 i_num = (wide_int) va_arg(ap, intmax_t); 859 break; 860#endif 861#if SIZEOF_PTRDIFF_T 862 case LM_PTRDIFF_T: 863 i_num = (wide_int) va_arg(ap, ptrdiff_t); 864 break; 865#endif 866 } 867 } 868 s = ap_php_conv_10(i_num, (*fmt) == 'u', &is_negative, 869 &num_buf[NUM_BUF_SIZE], &s_len); 870 FIX_PRECISION(adjust_precision, precision, s, s_len); 871 872 if (*fmt != 'u') { 873 if (is_negative) { 874 prefix_char = '-'; 875 } else if (print_sign) { 876 prefix_char = '+'; 877 } else if (print_blank) { 878 prefix_char = ' '; 879 } 880 } 881 break; 882 883 884 case 'o': 885 switch(modifier) { 886 default: 887 ui_num = (u_wide_int) va_arg(ap, unsigned int); 888 break; 889 case LM_LONG_DOUBLE: 890 goto fmt_error; 891 case LM_LONG: 892 ui_num = (u_wide_int) va_arg(ap, unsigned long int); 893 break; 894 case LM_SIZE_T: 895 ui_num = (u_wide_int) va_arg(ap, size_t); 896 break; 897#if SIZEOF_LONG_LONG 898 case LM_LONG_LONG: 899 ui_num = (u_wide_int) va_arg(ap, u_wide_int); 900 break; 901#endif 902#if SIZEOF_INTMAX_T 903 case LM_INTMAX_T: 904 ui_num = (u_wide_int) va_arg(ap, uintmax_t); 905 break; 906#endif 907#if SIZEOF_PTRDIFF_T 908 case LM_PTRDIFF_T: 909 ui_num = (u_wide_int) va_arg(ap, ptrdiff_t); 910 break; 911#endif 912 } 913 s = ap_php_conv_p2(ui_num, 3, *fmt, &num_buf[NUM_BUF_SIZE], &s_len); 914 FIX_PRECISION(adjust_precision, precision, s, s_len); 915 if (alternate_form && *s != '0') { 916 *--s = '0'; 917 s_len++; 918 } 919 break; 920 921 922 case 'x': 923 case 'X': 924 switch(modifier) { 925 default: 926 ui_num = (u_wide_int) va_arg(ap, unsigned int); 927 break; 928 case LM_LONG_DOUBLE: 929 goto fmt_error; 930 case LM_LONG: 931 ui_num = (u_wide_int) va_arg(ap, unsigned long int); 932 break; 933 case LM_SIZE_T: 934 ui_num = (u_wide_int) va_arg(ap, size_t); 935 break; 936#if SIZEOF_LONG_LONG 937 case LM_LONG_LONG: 938 ui_num = (u_wide_int) va_arg(ap, u_wide_int); 939 break; 940#endif 941#if SIZEOF_INTMAX_T 942 case LM_INTMAX_T: 943 ui_num = (u_wide_int) va_arg(ap, uintmax_t); 944 break; 945#endif 946#if SIZEOF_PTRDIFF_T 947 case LM_PTRDIFF_T: 948 ui_num = (u_wide_int) va_arg(ap, ptrdiff_t); 949 break; 950#endif 951 } 952 s = ap_php_conv_p2(ui_num, 4, *fmt, &num_buf[NUM_BUF_SIZE], &s_len); 953 FIX_PRECISION(adjust_precision, precision, s, s_len); 954 if (alternate_form && i_num != 0) { 955 *--s = *fmt; /* 'x' or 'X' */ 956 *--s = '0'; 957 s_len += 2; 958 } 959 break; 960 961 962 case 's': 963 case 'v': 964 s = va_arg(ap, char *); 965 if (s != NULL) { 966 s_len = strlen(s); 967 if (adjust_precision && precision < s_len) { 968 s_len = precision; 969 } 970 } else { 971 s = S_NULL; 972 s_len = S_NULL_LEN; 973 } 974 pad_char = ' '; 975 break; 976 977 978 case 'f': 979 case 'F': 980 case 'e': 981 case 'E': 982 switch(modifier) { 983 case LM_LONG_DOUBLE: 984 fp_num = (double) va_arg(ap, long double); 985 break; 986 case LM_STD: 987 fp_num = va_arg(ap, double); 988 break; 989 default: 990 goto fmt_error; 991 } 992 993 if (zend_isnan(fp_num)) { 994 s = "NAN"; 995 s_len = 3; 996 } else if (zend_isinf(fp_num)) { 997 s = "INF"; 998 s_len = 3; 999 } else { 1000#ifdef HAVE_LOCALE_H 1001 if (!lconv) { 1002 lconv = localeconv(); 1003 } 1004#endif 1005 s = php_conv_fp((*fmt == 'f')?'F':*fmt, fp_num, alternate_form, 1006 (adjust_precision == NO) ? FLOAT_DIGITS : precision, 1007 (*fmt == 'f')?LCONV_DECIMAL_POINT:'.', 1008 &is_negative, &num_buf[1], &s_len); 1009 if (is_negative) 1010 prefix_char = '-'; 1011 else if (print_sign) 1012 prefix_char = '+'; 1013 else if (print_blank) 1014 prefix_char = ' '; 1015 } 1016 break; 1017 1018 1019 case 'g': 1020 case 'k': 1021 case 'G': 1022 case 'H': 1023 switch(modifier) { 1024 case LM_LONG_DOUBLE: 1025 fp_num = (double) va_arg(ap, long double); 1026 break; 1027 case LM_STD: 1028 fp_num = va_arg(ap, double); 1029 break; 1030 default: 1031 goto fmt_error; 1032 } 1033 1034 if (zend_isnan(fp_num)) { 1035 s = "NAN"; 1036 s_len = 3; 1037 break; 1038 } else if (zend_isinf(fp_num)) { 1039 if (fp_num > 0) { 1040 s = "INF"; 1041 s_len = 3; 1042 } else { 1043 s = "-INF"; 1044 s_len = 4; 1045 } 1046 break; 1047 } 1048 1049 if (adjust_precision == NO) { 1050 precision = FLOAT_DIGITS; 1051 } else if (precision == 0) { 1052 precision = 1; 1053 } 1054 /* 1055 * * We use &num_buf[ 1 ], so that we have room for the sign 1056 */ 1057#ifdef HAVE_LOCALE_H 1058 if (!lconv) { 1059 lconv = localeconv(); 1060 } 1061#endif 1062 s = php_gcvt(fp_num, precision, (*fmt=='H' || *fmt == 'k') ? '.' : LCONV_DECIMAL_POINT, (*fmt == 'G' || *fmt == 'H')?'E':'e', &num_buf[1]); 1063 if (*s == '-') { 1064 prefix_char = *s++; 1065 } else if (print_sign) { 1066 prefix_char = '+'; 1067 } else if (print_blank) { 1068 prefix_char = ' '; 1069 } 1070 1071 s_len = strlen(s); 1072 1073 if (alternate_form && (strchr(s, '.')) == NULL) { 1074 s[s_len++] = '.'; 1075 } 1076 break; 1077 1078 1079 case 'c': 1080 char_buf[0] = (char) (va_arg(ap, int)); 1081 s = &char_buf[0]; 1082 s_len = 1; 1083 pad_char = ' '; 1084 break; 1085 1086 1087 case '%': 1088 char_buf[0] = '%'; 1089 s = &char_buf[0]; 1090 s_len = 1; 1091 pad_char = ' '; 1092 break; 1093 1094 1095 case 'n': 1096 *(va_arg(ap, int *)) = cc; 1097 goto skip_output; 1098 1099 /* 1100 * Always extract the argument as a "char *" pointer. We 1101 * should be using "void *" but there are still machines 1102 * that don't understand it. 1103 * If the pointer size is equal to the size of an unsigned 1104 * integer we convert the pointer to a hex number, otherwise 1105 * we print "%p" to indicate that we don't handle "%p". 1106 */ 1107 case 'p': 1108 if (sizeof(char *) <= sizeof(u_wide_int)) { 1109 ui_num = (u_wide_int)((size_t) va_arg(ap, char *)); 1110 s = ap_php_conv_p2(ui_num, 4, 'x', 1111 &num_buf[NUM_BUF_SIZE], &s_len); 1112 if (ui_num != 0) { 1113 *--s = 'x'; 1114 *--s = '0'; 1115 s_len += 2; 1116 } 1117 } else { 1118 s = "%p"; 1119 s_len = 2; 1120 } 1121 pad_char = ' '; 1122 break; 1123 1124 1125 case NUL: 1126 /* 1127 * The last character of the format string was %. 1128 * We ignore it. 1129 */ 1130 continue; 1131 1132 1133fmt_error: 1134 php_error(E_ERROR, "Illegal length modifier specified '%c' in s[np]printf call", *fmt); 1135 /* 1136 * The default case is for unrecognized %'s. 1137 * We print %<char> to help the user identify what 1138 * option is not understood. 1139 * This is also useful in case the user wants to pass 1140 * the output of format_converter to another function 1141 * that understands some other %<char> (like syslog). 1142 * Note that we can't point s inside fmt because the 1143 * unknown <char> could be preceded by width etc. 1144 */ 1145 default: 1146 char_buf[0] = '%'; 1147 char_buf[1] = *fmt; 1148 s = char_buf; 1149 s_len = 2; 1150 pad_char = ' '; 1151 break; 1152 } 1153 1154 if (prefix_char != NUL) { 1155 *--s = prefix_char; 1156 s_len++; 1157 } 1158 if (adjust_width && adjust == RIGHT && min_width > s_len) { 1159 if (pad_char == '0' && prefix_char != NUL) { 1160 INS_CHAR(*s, sp, bep, cc) 1161 s++; 1162 s_len--; 1163 min_width--; 1164 } 1165 PAD(min_width, s_len, pad_char); 1166 } 1167 /* 1168 * Print the string s. 1169 */ 1170 for (i = s_len; i != 0; i--) { 1171 INS_CHAR(*s, sp, bep, cc); 1172 s++; 1173 } 1174 1175 if (adjust_width && adjust == LEFT && min_width > s_len) 1176 PAD(min_width, s_len, pad_char); 1177 if (free_zcopy) { 1178 zval_dtor(&zcopy); 1179 } 1180 } 1181skip_output: 1182 fmt++; 1183 } 1184 odp->nextb = sp; 1185 return (cc); 1186} 1187/* }}} */ 1188 1189/* 1190 * This is the general purpose conversion function. 1191 */ 1192static void strx_printv(int *ccp, char *buf, size_t len, const char *format, va_list ap) /* {{{ */ 1193{ 1194 buffy od; 1195 int cc; 1196 1197 /* 1198 * First initialize the descriptor 1199 * Notice that if no length is given, we initialize buf_end to the 1200 * highest possible address. 1201 */ 1202 if (len == 0) { 1203 od.buf_end = (char *) ~0; 1204 od.nextb = (char *) ~0; 1205 } else { 1206 od.buf_end = &buf[len-1]; 1207 od.nextb = buf; 1208 } 1209 1210 /* 1211 * Do the conversion 1212 */ 1213 cc = format_converter(&od, format, ap); 1214 if (len != 0 && od.nextb <= od.buf_end) { 1215 *(od.nextb) = '\0'; 1216 } 1217 if (ccp) { 1218 *ccp = cc; 1219 } 1220} 1221/* }}} */ 1222 1223PHPAPI int ap_php_slprintf(char *buf, size_t len, const char *format,...) /* {{{ */ 1224{ 1225 unsigned int cc; 1226 va_list ap; 1227 1228 va_start(ap, format); 1229 strx_printv(&cc, buf, len, format, ap); 1230 va_end(ap); 1231 if (cc >= len) { 1232 cc = len -1; 1233 buf[cc] = '\0'; 1234 } 1235 return cc; 1236} 1237/* }}} */ 1238 1239PHPAPI int ap_php_vslprintf(char *buf, size_t len, const char *format, va_list ap) /* {{{ */ 1240{ 1241 unsigned int cc; 1242 1243 strx_printv(&cc, buf, len, format, ap); 1244 if (cc >= len) { 1245 cc = len -1; 1246 buf[cc] = '\0'; 1247 } 1248 return cc; 1249} 1250/* }}} */ 1251 1252PHPAPI int ap_php_snprintf(char *buf, size_t len, const char *format,...) /* {{{ */ 1253{ 1254 int cc; 1255 va_list ap; 1256 1257 va_start(ap, format); 1258 strx_printv(&cc, buf, len, format, ap); 1259 va_end(ap); 1260 return (cc); 1261} 1262/* }}} */ 1263 1264PHPAPI int ap_php_vsnprintf(char *buf, size_t len, const char *format, va_list ap) /* {{{ */ 1265{ 1266 int cc; 1267 1268 strx_printv(&cc, buf, len, format, ap); 1269 return (cc); 1270} 1271/* }}} */ 1272 1273PHPAPI int ap_php_vasprintf(char **buf, const char *format, va_list ap) /* {{{ */ 1274{ 1275 va_list ap2; 1276 int cc; 1277 1278 va_copy(ap2, ap); 1279 cc = ap_php_vsnprintf(NULL, 0, format, ap2); 1280 va_end(ap2); 1281 1282 *buf = NULL; 1283 1284 if (cc >= 0) { 1285 if ((*buf = malloc(++cc)) != NULL) { 1286 if ((cc = ap_php_vsnprintf(*buf, cc, format, ap)) < 0) { 1287 free(*buf); 1288 *buf = NULL; 1289 } 1290 } 1291 } 1292 1293 return cc; 1294} 1295/* }}} */ 1296 1297PHPAPI int ap_php_asprintf(char **buf, const char *format, ...) /* {{{ */ 1298{ 1299 int cc; 1300 va_list ap; 1301 1302 va_start(ap, format); 1303 cc = vasprintf(buf, format, ap); 1304 va_end(ap); 1305 return cc; 1306} 1307/* }}} */ 1308 1309/* 1310 * Local variables: 1311 * tab-width: 4 1312 * c-basic-offset: 4 1313 * End: 1314 * vim600: sw=4 ts=4 fdm=marker 1315 * vim<600: sw=4 ts=4 1316 */ 1317