/* +----------------------------------------------------------------------+ | PHP Version 5 | +----------------------------------------------------------------------+ | Copyright (c) 1997-2014 The PHP Group | +----------------------------------------------------------------------+ | This source file is subject to version 3.01 of the PHP license, | | that is bundled with this package in the file LICENSE, and is | | available through the world-wide-web at the following url: | | http://www.php.net/license/3_01.txt | | If you did not receive a copy of the PHP license and are unable to | | obtain it through the world-wide-web, please send a note to | | license@php.net so we can mail you a copy immediately. | +----------------------------------------------------------------------+ | Author: Marcus Boerger | +----------------------------------------------------------------------+ */ /* $Id$ */ /* This is the spprintf implementation. * It has emerged from apache snprintf. See original header: */ /* ==================================================================== * Copyright (c) 1995-1998 The Apache Group. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the Apache Group * for use in the Apache HTTP server project (http://www.apache.org/)." * * 4. The names "Apache Server" and "Apache Group" must not be used to * endorse or promote products derived from this software without * prior written permission. * * 5. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the Apache Group * for use in the Apache HTTP server project (http://www.apache.org/)." * * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Group and was originally based * on public domain software written at the National Center for * Supercomputing Applications, University of Illinois, Urbana-Champaign. * For more information on the Apache Group and the Apache HTTP server * project, please see . * * This code is based on, and used with the permission of, the * SIO stdio-replacement strx_* functions by Panos Tsirigotis * for xinetd. */ #define _GNU_SOURCE #include "php.h" #include #include #include #include #include #include #include #include #ifdef HAVE_INTTYPES_H #include #endif #ifdef HAVE_LOCALE_H #include #define LCONV_DECIMAL_POINT (*lconv->decimal_point) #else #define LCONV_DECIMAL_POINT '.' #endif #include "snprintf.h" #define FALSE 0 #define TRUE 1 #define NUL '\0' #define INT_NULL ((int *)0) #define S_NULL "(null)" #define S_NULL_LEN 6 #define FLOAT_DIGITS 6 #define EXPONENT_LENGTH 10 #include "ext/standard/php_smart_str.h" #include "ext/standard/php_smart_string.h" /* {{{ macros */ #define INS_CHAR(xbuf, ch, is_char) do { \ if ((is_char)) { \ smart_string_appendc((smart_string *)(xbuf), (ch)); \ } else { \ smart_str_appendc((smart_str *)(xbuf), (ch)); \ } \ } while (0); #define INS_STRING(xbuf, str, len, is_char) do { \ if ((is_char)) { \ smart_string_appendl((smart_string *)(xbuf), (str), (len)); \ } else { \ smart_str_appendl((smart_str *)(xbuf), (str), (len)); \ } \ } while (0); #define PAD_CHAR(xbuf, ch, count, is_char) do { \ size_t newlen; \ if ((is_char)) { \ smart_string_alloc(((smart_string *)(xbuf)), (count), 0); \ memset(((smart_string *)(xbuf))->c + ((smart_string *)(xbuf))->len, (ch), (count)); \ ((smart_string *)(xbuf))->len += (count); \ } else { \ smart_str_alloc(((smart_str *)(xbuf)), (count), 0); \ memset(((smart_str *)(xbuf))->s->val + ((smart_str *)(xbuf))->s->len, (ch), (count)); \ ((smart_str *)(xbuf))->s->len += (count); \ } \ } while (0); /* * NUM_BUF_SIZE is the size of the buffer used for arithmetic conversions * * XXX: this is a magic number; do not decrease it * Emax = 1023 * NDIG = 320 * NUM_BUF_SIZE >= strlen("-") + Emax + strlrn(".") + NDIG + strlen("E+1023") + 1; */ #define NUM_BUF_SIZE 2048 #define NUM(c) (c - '0') #define STR_TO_DEC(str, num) do { \ num = NUM(*str++); \ while (isdigit((int)*str)) { \ num *= 10; \ num += NUM(*str++); \ if (num >= INT_MAX / 10) { \ while (isdigit((int)*str++)); \ break; \ } \ } \ } while (0) /* * This macro does zero padding so that the precision * requirement is satisfied. The padding is done by * adding '0's to the left of the string that is going * to be printed. */ #define FIX_PRECISION(adjust, precision, s, s_len) do { \ if (adjust) \ while (s_len < precision) { \ *--s = '0'; \ s_len++; \ } \ } while (0) /* }}} */ #if !HAVE_STRNLEN static size_t strnlen(const char *s, size_t maxlen) { char *r = memchr(s, '\0', maxlen); return r ? r-s : maxlen; } #endif /* * Do format conversion placing the output in buffer */ static void xbuf_format_converter(void *xbuf, zend_bool is_char, const char *fmt, va_list ap) /* {{{ */ { char *s = NULL; int s_len, free_zcopy; zval *zvp, zcopy; int min_width = 0; int precision = 0; enum { LEFT, RIGHT } adjust; char pad_char; char prefix_char; double fp_num; wide_int i_num = (wide_int) 0; u_wide_int ui_num = (u_wide_int) 0; char num_buf[NUM_BUF_SIZE]; char char_buf[2]; /* for printing %% and % */ #ifdef HAVE_LOCALE_H struct lconv *lconv = NULL; #endif /* * Flag variables */ length_modifier_e modifier; boolean_e alternate_form; boolean_e print_sign; boolean_e print_blank; boolean_e adjust_precision; boolean_e adjust_width; bool_int is_negative; while (*fmt) { if (*fmt != '%') { INS_CHAR(xbuf, *fmt, is_char); } else { /* * Default variable settings */ adjust = RIGHT; alternate_form = print_sign = print_blank = NO; pad_char = ' '; prefix_char = NUL; free_zcopy = 0; fmt++; /* * Try to avoid checking for flags, width or precision */ if (isascii((int)*fmt) && !islower((int)*fmt)) { /* * Recognize flags: -, #, BLANK, + */ for (;; fmt++) { if (*fmt == '-') adjust = LEFT; else if (*fmt == '+') print_sign = YES; else if (*fmt == '#') alternate_form = YES; else if (*fmt == ' ') print_blank = YES; else if (*fmt == '0') pad_char = '0'; else break; } /* * Check if a width was specified */ if (isdigit((int)*fmt)) { STR_TO_DEC(fmt, min_width); adjust_width = YES; } else if (*fmt == '*') { min_width = va_arg(ap, int); fmt++; adjust_width = YES; if (min_width < 0) { adjust = LEFT; min_width = -min_width; } } else adjust_width = NO; /* * Check if a precision was specified */ if (*fmt == '.') { adjust_precision = YES; fmt++; if (isdigit((int)*fmt)) { STR_TO_DEC(fmt, precision); } else if (*fmt == '*') { precision = va_arg(ap, int); fmt++; if (precision < 0) precision = 0; } else precision = 0; if (precision > FORMAT_CONV_MAX_PRECISION) { precision = FORMAT_CONV_MAX_PRECISION; } } else adjust_precision = NO; } else adjust_precision = adjust_width = NO; /* * Modifier check */ switch (*fmt) { case 'L': fmt++; modifier = LM_LONG_DOUBLE; break; case 'I': fmt++; #if SIZEOF_LONG_LONG if (*fmt == '6' && *(fmt+1) == '4') { fmt += 2; modifier = LM_LONG_LONG; } else #endif if (*fmt == '3' && *(fmt+1) == '2') { fmt += 2; modifier = LM_LONG; } else { #ifdef _WIN64 modifier = LM_LONG_LONG; #else modifier = LM_LONG; #endif } break; case 'l': fmt++; #if SIZEOF_LONG_LONG if (*fmt == 'l') { fmt++; modifier = LM_LONG_LONG; } else #endif modifier = LM_LONG; break; case 'z': fmt++; modifier = LM_SIZE_T; break; case 'j': fmt++; #if SIZEOF_INTMAX_T modifier = LM_INTMAX_T; #else modifier = LM_SIZE_T; #endif break; case 't': fmt++; #if SIZEOF_PTRDIFF_T modifier = LM_PTRDIFF_T; #else modifier = LM_SIZE_T; #endif break; case 'h': fmt++; if (*fmt == 'h') { fmt++; } /* these are promoted to int, so no break */ default: modifier = LM_STD; break; } /* * Argument extraction and printing. * First we determine the argument type. * Then, we convert the argument to a string. * On exit from the switch, s points to the string that * must be printed, s_len has the length of the string * The precision requirements, if any, are reflected in s_len. * * NOTE: pad_char may be set to '0' because of the 0 flag. * It is reset to ' ' by non-numeric formats */ switch (*fmt) { case 'Z': zvp = (zval*) va_arg(ap, zval*); zend_make_printable_zval(zvp, &zcopy, &free_zcopy); if (free_zcopy) { zvp = &zcopy; } s_len = Z_STRLEN_P(zvp); s = Z_STRVAL_P(zvp); if (adjust_precision && precision < s_len) { s_len = precision; } break; case 'u': switch(modifier) { default: i_num = (wide_int) va_arg(ap, unsigned int); break; case LM_LONG_DOUBLE: goto fmt_error; case LM_LONG: i_num = (wide_int) va_arg(ap, unsigned long int); break; case LM_SIZE_T: i_num = (wide_int) va_arg(ap, size_t); break; #if SIZEOF_LONG_LONG case LM_LONG_LONG: i_num = (wide_int) va_arg(ap, u_wide_int); break; #endif #if SIZEOF_INTMAX_T case LM_INTMAX_T: i_num = (wide_int) va_arg(ap, uintmax_t); break; #endif #if SIZEOF_PTRDIFF_T case LM_PTRDIFF_T: i_num = (wide_int) va_arg(ap, ptrdiff_t); break; #endif } /* * The rest also applies to other integer formats, so fall * into that case. */ case 'd': case 'i': /* * Get the arg if we haven't already. */ if ((*fmt) != 'u') { switch(modifier) { default: i_num = (wide_int) va_arg(ap, int); break; case LM_LONG_DOUBLE: goto fmt_error; case LM_LONG: i_num = (wide_int) va_arg(ap, long int); break; case LM_SIZE_T: #if SIZEOF_SSIZE_T i_num = (wide_int) va_arg(ap, ssize_t); #else i_num = (wide_int) va_arg(ap, size_t); #endif break; #if SIZEOF_LONG_LONG case LM_LONG_LONG: i_num = (wide_int) va_arg(ap, wide_int); break; #endif #if SIZEOF_INTMAX_T case LM_INTMAX_T: i_num = (wide_int) va_arg(ap, intmax_t); break; #endif #if SIZEOF_PTRDIFF_T case LM_PTRDIFF_T: i_num = (wide_int) va_arg(ap, ptrdiff_t); break; #endif } } s = ap_php_conv_10(i_num, (*fmt) == 'u', &is_negative, &num_buf[NUM_BUF_SIZE], &s_len); FIX_PRECISION(adjust_precision, precision, s, s_len); if (*fmt != 'u') { if (is_negative) prefix_char = '-'; else if (print_sign) prefix_char = '+'; else if (print_blank) prefix_char = ' '; } break; case 'o': switch(modifier) { default: ui_num = (u_wide_int) va_arg(ap, unsigned int); break; case LM_LONG_DOUBLE: goto fmt_error; case LM_LONG: ui_num = (u_wide_int) va_arg(ap, unsigned long int); break; case LM_SIZE_T: ui_num = (u_wide_int) va_arg(ap, size_t); break; #if SIZEOF_LONG_LONG case LM_LONG_LONG: ui_num = (u_wide_int) va_arg(ap, u_wide_int); break; #endif #if SIZEOF_INTMAX_T case LM_INTMAX_T: ui_num = (u_wide_int) va_arg(ap, uintmax_t); break; #endif #if SIZEOF_PTRDIFF_T case LM_PTRDIFF_T: ui_num = (u_wide_int) va_arg(ap, ptrdiff_t); break; #endif } s = ap_php_conv_p2(ui_num, 3, *fmt, &num_buf[NUM_BUF_SIZE], &s_len); FIX_PRECISION(adjust_precision, precision, s, s_len); if (alternate_form && *s != '0') { *--s = '0'; s_len++; } break; case 'x': case 'X': switch(modifier) { default: ui_num = (u_wide_int) va_arg(ap, unsigned int); break; case LM_LONG_DOUBLE: goto fmt_error; case LM_LONG: ui_num = (u_wide_int) va_arg(ap, unsigned long int); break; case LM_SIZE_T: ui_num = (u_wide_int) va_arg(ap, size_t); break; #if SIZEOF_LONG_LONG case LM_LONG_LONG: ui_num = (u_wide_int) va_arg(ap, u_wide_int); break; #endif #if SIZEOF_INTMAX_T case LM_INTMAX_T: ui_num = (u_wide_int) va_arg(ap, uintmax_t); break; #endif #if SIZEOF_PTRDIFF_T case LM_PTRDIFF_T: ui_num = (u_wide_int) va_arg(ap, ptrdiff_t); break; #endif } s = ap_php_conv_p2(ui_num, 4, *fmt, &num_buf[NUM_BUF_SIZE], &s_len); FIX_PRECISION(adjust_precision, precision, s, s_len); if (alternate_form && ui_num != 0) { *--s = *fmt; /* 'x' or 'X' */ *--s = '0'; s_len += 2; } break; case 's': case 'v': s = va_arg(ap, char *); if (s != NULL) { if (!adjust_precision) { s_len = strlen(s); } else { s_len = strnlen(s, precision); } } else { s = S_NULL; s_len = S_NULL_LEN; } pad_char = ' '; break; case 'f': case 'F': case 'e': case 'E': switch(modifier) { case LM_LONG_DOUBLE: fp_num = (double) va_arg(ap, long double); break; case LM_STD: fp_num = va_arg(ap, double); break; default: goto fmt_error; } if (zend_isnan(fp_num)) { s = "nan"; s_len = 3; } else if (zend_isinf(fp_num)) { s = "inf"; s_len = 3; } else { #ifdef HAVE_LOCALE_H if (!lconv) { lconv = localeconv(); } #endif s = php_conv_fp((*fmt == 'f')?'F':*fmt, fp_num, alternate_form, (adjust_precision == NO) ? FLOAT_DIGITS : precision, (*fmt == 'f')?LCONV_DECIMAL_POINT:'.', &is_negative, &num_buf[1], &s_len); if (is_negative) prefix_char = '-'; else if (print_sign) prefix_char = '+'; else if (print_blank) prefix_char = ' '; } break; case 'g': case 'k': case 'G': case 'H': switch(modifier) { case LM_LONG_DOUBLE: fp_num = (double) va_arg(ap, long double); break; case LM_STD: fp_num = va_arg(ap, double); break; default: goto fmt_error; } if (zend_isnan(fp_num)) { s = "NAN"; s_len = 3; break; } else if (zend_isinf(fp_num)) { if (fp_num > 0) { s = "INF"; s_len = 3; } else { s = "-INF"; s_len = 4; } break; } if (adjust_precision == NO) precision = FLOAT_DIGITS; else if (precision == 0) precision = 1; /* * * We use &num_buf[ 1 ], so that we have room for the sign */ #ifdef HAVE_LOCALE_H if (!lconv) { lconv = localeconv(); } #endif s = php_gcvt(fp_num, precision, (*fmt=='H' || *fmt == 'k') ? '.' : LCONV_DECIMAL_POINT, (*fmt == 'G' || *fmt == 'H')?'E':'e', &num_buf[1]); if (*s == '-') prefix_char = *s++; else if (print_sign) prefix_char = '+'; else if (print_blank) prefix_char = ' '; s_len = strlen(s); if (alternate_form && (strchr(s, '.')) == NULL) s[s_len++] = '.'; break; case 'c': char_buf[0] = (char) (va_arg(ap, int)); s = &char_buf[0]; s_len = 1; pad_char = ' '; break; case '%': char_buf[0] = '%'; s = &char_buf[0]; s_len = 1; pad_char = ' '; break; case 'n': *(va_arg(ap, int *)) = is_char? ((smart_string *)xbuf)->len : ((smart_str *)xbuf)->s->len; goto skip_output; /* * Always extract the argument as a "char *" pointer. We * should be using "void *" but there are still machines * that don't understand it. * If the pointer size is equal to the size of an unsigned * integer we convert the pointer to a hex number, otherwise * we print "%p" to indicate that we don't handle "%p". */ case 'p': if (sizeof(char *) <= sizeof(u_wide_int)) { ui_num = (u_wide_int)((size_t) va_arg(ap, char *)); s = ap_php_conv_p2(ui_num, 4, 'x', &num_buf[NUM_BUF_SIZE], &s_len); if (ui_num != 0) { *--s = 'x'; *--s = '0'; s_len += 2; } } else { s = "%p"; s_len = 2; } pad_char = ' '; break; case NUL: /* * The last character of the format string was %. * We ignore it. */ continue; fmt_error: php_error(E_ERROR, "Illegal length modifier specified '%c' in s[np]printf call", *fmt); /* * The default case is for unrecognized %'s. * We print % to help the user identify what * option is not understood. * This is also useful in case the user wants to pass * the output of format_converter to another function * that understands some other % (like syslog). * Note that we can't point s inside fmt because the * unknown could be preceded by width etc. */ default: char_buf[0] = '%'; char_buf[1] = *fmt; s = char_buf; s_len = 2; pad_char = ' '; break; } if (prefix_char != NUL) { *--s = prefix_char; s_len++; } if (adjust_width && adjust == RIGHT && min_width > s_len) { if (pad_char == '0' && prefix_char != NUL) { INS_CHAR(xbuf, *s, is_char); s++; s_len--; min_width--; } PAD_CHAR(xbuf, pad_char, min_width - s_len, is_char); } /* * Print the string s. */ INS_STRING(xbuf, s, s_len, is_char); if (adjust_width && adjust == LEFT && min_width > s_len) { PAD_CHAR(xbuf, pad_char, min_width - s_len, is_char); } if (free_zcopy) { zval_dtor(&zcopy); } } skip_output: fmt++; } return; } /* }}} */ /* * This is the general purpose conversion function. */ PHPAPI int vspprintf(char **pbuf, size_t max_len, const char *format, va_list ap) /* {{{ */ { smart_string buf = {0}; int result; xbuf_format_converter(&buf, 1, format, ap); if (max_len && buf.len > max_len) { buf.len = max_len; } smart_string_0(&buf); if (buf.c) { *pbuf = buf.c; result = buf.len; } else { *pbuf = NULL; result = 0; } return result; } /* }}} */ PHPAPI int spprintf(char **pbuf, size_t max_len, const char *format, ...) /* {{{ */ { int cc; va_list ap; va_start(ap, format); cc = vspprintf(pbuf, max_len, format, ap); va_end(ap); return (cc); } /* }}} */ PHPAPI zend_string *vstrpprintf(size_t max_len, const char *format, va_list ap) /* {{{ */ { smart_str buf = {0}; xbuf_format_converter(&buf, 0, format, ap); if (max_len && buf.s && buf.s->len > max_len) { buf.s->len = max_len; } smart_str_0(&buf); return buf.s; } /* }}} */ PHPAPI zend_string *strpprintf(size_t max_len, const char *format, ...) /* {{{ */ { va_list ap; zend_string *str; va_start(ap, format); str = vstrpprintf(max_len, format, ap); va_end(ap); return str; } /* }}} */ /* * Local variables: * tab-width: 4 * c-basic-offset: 4 * End: * vim600: sw=4 ts=4 fdm=marker * vim<600: sw=4 ts=4 */