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php-src/main/snprintf.c
George Peter Banyard 282abfed95 Drop register keyword
2021-07-15 10:40:36 +02:00

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/*
+----------------------------------------------------------------------+
| Copyright (c) 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: |
| https://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: |
+----------------------------------------------------------------------+
*/
#define _GNU_SOURCE
#include "php.h"
#include <zend_strtod.h>
#include <stddef.h>
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <inttypes.h>
#include <locale.h>
#ifdef ZTS
#include "ext/standard/php_string.h"
#define LCONV_DECIMAL_POINT (*lconv.decimal_point)
#else
#define LCONV_DECIMAL_POINT (*lconv->decimal_point)
#endif
/*
* Copyright (c) 2002, 2006 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
static char * __cvt(double value, int ndigit, int *decpt, bool *sign, int fmode, int pad) /* {{{ */
{
char *s = NULL;
char *p, *rve, c;
size_t siz;
if (ndigit < 0) {
siz = -ndigit + 1;
} else {
siz = ndigit + 1;
}
/* __dtoa() doesn't allocate space for 0 so we do it by hand */
if (value == 0.0) {
*decpt = 1 - fmode; /* 1 for 'e', 0 for 'f' */
*sign = 0;
if ((rve = s = (char *)malloc(ndigit?siz:2)) == NULL) {
return(NULL);
}
*rve++ = '0';
*rve = '\0';
if (!ndigit) {
return(s);
}
} else {
p = zend_dtoa(value, fmode + 2, ndigit, decpt, sign, &rve);
if (*decpt == 9999) {
/* Infinity or Nan, convert to inf or nan like printf */
*decpt = 0;
c = *p;
zend_freedtoa(p);
return strdup((c == 'I' ? "INF" : "NAN"));
}
/* Make a local copy and adjust rve to be in terms of s */
if (pad && fmode) {
siz += *decpt;
}
if ((s = (char *)malloc(siz+1)) == NULL) {
zend_freedtoa(p);
return(NULL);
}
(void) strlcpy(s, p, siz);
rve = s + (rve - p);
zend_freedtoa(p);
}
/* Add trailing zeros */
if (pad) {
siz -= rve - s;
while (--siz) {
*rve++ = '0';
}
*rve = '\0';
}
return(s);
}
/* }}} */
static inline char *php_ecvt(double value, int ndigit, int *decpt, bool *sign) /* {{{ */
{
return(__cvt(value, ndigit, decpt, sign, 0, 1));
}
/* }}} */
static inline char *php_fcvt(double value, int ndigit, int *decpt, bool *sign) /* {{{ */
{
return(__cvt(value, ndigit, decpt, sign, 1, 1));
}
/* }}} */
PHPAPI char *php_gcvt(double value, int ndigit, char dec_point, char exponent, char *buf) /* {{{ */
{
char *digits, *dst, *src;
int i, decpt;
bool sign;
int mode = ndigit >= 0 ? 2 : 0;
if (mode == 0) {
ndigit = 17;
}
digits = zend_dtoa(value, mode, ndigit, &decpt, &sign, NULL);
if (decpt == 9999) {
/*
* Infinity or NaN, convert to inf or nan with sign.
* We assume the buffer is at least ndigit long.
*/
snprintf(buf, ndigit + 1, "%s%s", (sign && *digits == 'I') ? "-" : "", *digits == 'I' ? "INF" : "NAN");
zend_freedtoa(digits);
return (buf);
}
dst = buf;
if (sign) {
*dst++ = '-';
}
if ((decpt >= 0 && decpt > ndigit) || decpt < -3) { /* use E-style */
/* exponential format (e.g. 1.2345e+13) */
if (--decpt < 0) {
sign = 1;
decpt = -decpt;
} else {
sign = 0;
}
src = digits;
*dst++ = *src++;
*dst++ = dec_point;
if (*src == '\0') {
*dst++ = '0';
} else {
do {
*dst++ = *src++;
} while (*src != '\0');
}
*dst++ = exponent;
if (sign) {
*dst++ = '-';
} else {
*dst++ = '+';
}
if (decpt < 10) {
*dst++ = '0' + decpt;
*dst = '\0';
} else {
/* XXX - optimize */
int n;
for (n = decpt, i = 0; (n /= 10) != 0; i++);
dst[i + 1] = '\0';
while (decpt != 0) {
dst[i--] = '0' + decpt % 10;
decpt /= 10;
}
}
} else if (decpt < 0) {
/* standard format 0. */
*dst++ = '0'; /* zero before decimal point */
*dst++ = dec_point;
do {
*dst++ = '0';
} while (++decpt < 0);
src = digits;
while (*src != '\0') {
*dst++ = *src++;
}
*dst = '\0';
} else {
/* standard format */
for (i = 0, src = digits; i < decpt; i++) {
if (*src != '\0') {
*dst++ = *src++;
} else {
*dst++ = '0';
}
}
if (*src != '\0') {
if (src == digits) {
*dst++ = '0'; /* zero before decimal point */
}
*dst++ = dec_point;
for (i = decpt; digits[i] != '\0'; i++) {
*dst++ = digits[i];
}
}
*dst = '\0';
}
zend_freedtoa(digits);
return (buf);
}
/* }}} */
/* {{{ Apache license */
/* ====================================================================
* 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 <http://www.apache.org/>.
*
* This code is based on, and used with the permission of, the
* SIO stdio-replacement strx_* functions by Panos Tsirigotis
* <panos@alumni.cs.colorado.edu> for xinetd.
*/
/* }}} */
#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
/*
* Convert num to its decimal format.
* Return value:
* - a pointer to a string containing the number (no sign)
* - len contains the length of the string
* - is_negative is set to true or false depending on the sign
* of the number (always set to false if is_unsigned is true)
*
* The caller provides a buffer for the string: that is the buf_end argument
* which is a pointer to the END of the buffer + 1 (i.e. if the buffer
* is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
*/
/* char * ap_php_conv_10() {{{ */
PHPAPI char * ap_php_conv_10(int64_t num, bool is_unsigned,
bool * is_negative, char *buf_end, size_t *len)
{
char *p = buf_end;
uint64_t magnitude;
if (is_unsigned) {
magnitude = (uint64_t) num;
*is_negative = false;
} else {
*is_negative = (num < 0);
/*
* On a 2's complement machine, negating the most negative integer
* results in a number that cannot be represented as a signed integer.
* Here is what we do to obtain the number's magnitude:
* a. add 1 to the number
* b. negate it (becomes positive)
* c. convert it to unsigned
* d. add 1
*/
if (*is_negative) {
int64_t t = num + 1;
magnitude = ((uint64_t) - t) + 1;
} else {
magnitude = (uint64_t) num;
}
}
/*
* We use a do-while loop so that we write at least 1 digit
*/
do {
uint64_t new_magnitude = magnitude / 10;
*--p = (char)(magnitude - new_magnitude * 10 + '0');
magnitude = new_magnitude;
}
while (magnitude);
*len = buf_end - p;
return (p);
}
/* }}} */
/* If you change this value then also change bug24640.phpt.
* Also NDIG must be reasonable smaller than NUM_BUF_SIZE.
*/
#define NDIG 320
/*
* Convert a floating point number to a string formats 'f', 'e' or 'E'.
* The result is placed in buf, and len denotes the length of the string
* The sign is returned in the is_negative argument (and is not placed
* in buf).
*/
/* PHPAPI char * php_conv_fp() {{{ */
PHPAPI char * php_conv_fp(char format, double num,
bool add_dp, int precision, char dec_point, bool * is_negative, char *buf, size_t *len)
{
char *s = buf;
char *p, *p_orig;
int decimal_point;
if (precision >= NDIG - 1) {
precision = NDIG - 2;
}
if (format == 'F') {
p_orig = p = php_fcvt(num, precision, &decimal_point, is_negative);
} else { /* either e or E format */
p_orig = p = php_ecvt(num, precision + 1, &decimal_point, is_negative);
}
/*
* Check for Infinity and NaN
*/
if (isalpha((int)*p)) {
*len = strlen(p);
memcpy(buf, p, *len + 1);
*is_negative = false;
free(p_orig);
return (buf);
}
if (format == 'F') {
if (decimal_point <= 0) {
if (num != 0 || precision > 0) {
*s++ = '0';
if (precision > 0) {
*s++ = dec_point;
while (decimal_point++ < 0) {
*s++ = '0';
}
} else if (add_dp) {
*s++ = dec_point;
}
}
} else {
int addz = decimal_point >= NDIG ? decimal_point - NDIG + 1 : 0;
decimal_point -= addz;
while (decimal_point-- > 0) {
*s++ = *p++;
}
while (addz-- > 0) {
*s++ = '0';
}
if (precision > 0 || add_dp) {
*s++ = dec_point;
}
}
} else {
*s++ = *p++;
if (precision > 0 || add_dp) {
*s++ = '.';
}
}
/*
* copy the rest of p, the NUL is NOT copied
*/
while (*p) {
*s++ = *p++;
}
if (format != 'F') {
char temp[EXPONENT_LENGTH]; /* for exponent conversion */
size_t t_len;
bool exponent_is_negative;
*s++ = format; /* either e or E */
decimal_point--;
if (decimal_point != 0) {
p = ap_php_conv_10((int64_t) decimal_point, false, &exponent_is_negative, &temp[EXPONENT_LENGTH], &t_len);
*s++ = exponent_is_negative ? '-' : '+';
/*
* Make sure the exponent has at least 2 digits
*/
while (t_len--) {
*s++ = *p++;
}
} else {
*s++ = '+';
*s++ = '0';
}
}
*len = s - buf;
free(p_orig);
return (buf);
}
/* }}} */
/*
* Convert num to a base X number where X is a power of 2. nbits determines X.
* For example, if nbits is 3, we do base 8 conversion
* Return value:
* a pointer to a string containing the number
*
* The caller provides a buffer for the string: that is the buf_end argument
* which is a pointer to the END of the buffer + 1 (i.e. if the buffer
* is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
*/
PHPAPI char * ap_php_conv_p2(uint64_t num, int nbits, char format, char *buf_end, size_t *len) /* {{{ */
{
int mask = (1 << nbits) - 1;
char *p = buf_end;
static const char low_digits[] = "0123456789abcdef";
static const char upper_digits[] = "0123456789ABCDEF";
const char *digits = (format == 'X') ? upper_digits : low_digits;
do {
*--p = digits[num & mask];
num >>= nbits;
}
while (num);
*len = buf_end - p;
return (p);
}
/* }}} */
/*
* 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 + strlen(".") + NDIG + strlen("E+1023") + 1;
*/
#define NUM_BUF_SIZE 2048
/*
* Descriptor for buffer area
*/
struct buf_area {
char *buf_end;
char *nextb; /* pointer to next byte to read/write */
};
typedef struct buf_area buffy;
/*
* The INS_CHAR macro inserts a character in the buffer and writes
* the buffer back to disk if necessary
* It uses the char pointers sp and bep:
* sp points to the next available character in the buffer
* bep points to the end-of-buffer+1
* While using this macro, note that the nextb pointer is NOT updated.
*
* NOTE: Evaluation of the c argument should not have any side-effects
*/
#define INS_CHAR(c, sp, bep, cc) \
{ \
if (sp < bep) \
{ \
*sp++ = c; \
} \
cc++; \
}
#define NUM( c ) ( c - '0' )
#define STR_TO_DEC( str, num ) \
num = NUM( *str++ ) ; \
while ( isdigit((int)*str ) ) \
{ \
num *= 10 ; \
num += NUM( *str++ ) ; \
}
/*
* 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 ) \
if ( adjust ) \
while ( s_len < (size_t)precision ) \
{ \
*--s = '0' ; \
s_len++ ; \
}
/*
* Macro that does padding. The padding is done by printing
* the character ch.
*/
#define PAD( width, len, ch ) do \
{ \
INS_CHAR( ch, sp, bep, cc ) ; \
width-- ; \
} \
while ( (size_t)width > len )
/*
* Do format conversion placing the output in buffer
*/
static size_t format_converter(buffy * odp, const char *fmt, va_list ap) /* {{{ */
{
char *sp;
char *bep;
size_t cc = 0;
size_t i;
char *s = NULL;
size_t s_len;
int min_width = 0;
int precision = 0;
enum {
LEFT, RIGHT
} adjust;
char pad_char;
char prefix_char;
double fp_num;
int64_t i_num = (int64_t) 0;
uint64_t ui_num;
char num_buf[NUM_BUF_SIZE];
char char_buf[2]; /* for printing %% and %<unknown> */
#ifdef ZTS
struct lconv lconv;
#else
struct lconv *lconv = NULL;
#endif
/*
* Flag variables
*/
length_modifier_e modifier;
bool alternate_form;
bool print_sign;
bool print_blank;
bool adjust_precision;
bool adjust_width;
bool is_negative;
sp = odp->nextb;
bep = odp->buf_end;
while (*fmt) {
if (*fmt != '%') {
INS_CHAR(*fmt, sp, bep, cc);
} else {
/*
* Default variable settings
*/
zend_string *tmp_str = NULL;
adjust = RIGHT;
alternate_form = print_sign = print_blank = false;
pad_char = ' ';
prefix_char = NUL;
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 = true;
else if (*fmt == '#')
alternate_form = true;
else if (*fmt == ' ')
print_blank = true;
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 = true;
} else if (*fmt == '*') {
min_width = va_arg(ap, int);
fmt++;
adjust_width = true;
if (min_width < 0) {
adjust = LEFT;
min_width = -min_width;
}
} else
adjust_width = false;
/*
* Check if a precision was specified
*/
if (*fmt == '.') {
adjust_precision = true;
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 = false;
} else
adjust_precision = adjust_width = false;
/*
* Modifier check
*/
switch (*fmt) {
case 'L':
fmt++;
modifier = LM_LONG_DOUBLE;
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 'p':
{
char __next = *(fmt+1);
if ('d' == __next || 'u' == __next || 'x' == __next || 'o' == __next) {
zend_error_noreturn(E_CORE_ERROR,
"printf \"p\" modifier is no longer supported, use ZEND_LONG_FMT");
}
modifier = LM_STD;
break;
}
case 'h':
fmt++;
if (*fmt == 'h') {
fmt++;
}
/* these are promoted to int, so no break */
ZEND_FALLTHROUGH;
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': {
zval *zvp = va_arg(ap, zval*);
zend_string *str = zval_get_tmp_string(zvp, &tmp_str);
s_len = ZSTR_LEN(str);
s = ZSTR_VAL(str);
if (adjust_precision && (size_t)precision < s_len) {
s_len = precision;
}
break;
}
case 'u':
switch(modifier) {
default:
i_num = (int64_t) va_arg(ap, unsigned int);
break;
case LM_LONG_DOUBLE:
goto fmt_error;
case LM_LONG:
i_num = (int64_t) va_arg(ap, unsigned long int);
break;
case LM_SIZE_T:
i_num = (int64_t) va_arg(ap, size_t);
break;
#if SIZEOF_LONG_LONG
case LM_LONG_LONG:
i_num = (int64_t) va_arg(ap, unsigned long long int);
break;
#endif
#if SIZEOF_INTMAX_T
case LM_INTMAX_T:
i_num = (int64_t) va_arg(ap, uintmax_t);
break;
#endif
#if SIZEOF_PTRDIFF_T
case LM_PTRDIFF_T:
i_num = (int64_t) va_arg(ap, ptrdiff_t);
break;
#endif
}
/*
* The rest also applies to other integer formats, so fall
* into that case.
*/
ZEND_FALLTHROUGH;
case 'd':
case 'i':
/*
* Get the arg if we haven't already.
*/
if ((*fmt) != 'u') {
switch(modifier) {
default:
i_num = (int64_t) va_arg(ap, int);
break;
case LM_LONG_DOUBLE:
goto fmt_error;
case LM_LONG:
i_num = (int64_t) va_arg(ap, long int);
break;
case LM_SIZE_T:
#if SIZEOF_SSIZE_T
i_num = (int64_t) va_arg(ap, ssize_t);
#else
i_num = (int64_t) va_arg(ap, size_t);
#endif
break;
#if SIZEOF_LONG_LONG
case LM_LONG_LONG:
i_num = (int64_t) va_arg(ap, long long int);
break;
#endif
#if SIZEOF_INTMAX_T
case LM_INTMAX_T:
i_num = (int64_t) va_arg(ap, intmax_t);
break;
#endif
#if SIZEOF_PTRDIFF_T
case LM_PTRDIFF_T:
i_num = (int64_t) 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 = (uint64_t) va_arg(ap, unsigned int);
break;
case LM_LONG_DOUBLE:
goto fmt_error;
case LM_LONG:
ui_num = (uint64_t) va_arg(ap, unsigned long int);
break;
case LM_SIZE_T:
ui_num = (uint64_t) va_arg(ap, size_t);
break;
#if SIZEOF_LONG_LONG
case LM_LONG_LONG:
ui_num = (uint64_t) va_arg(ap, unsigned long long int);
break;
#endif
#if SIZEOF_INTMAX_T
case LM_INTMAX_T:
ui_num = (uint64_t) va_arg(ap, uintmax_t);
break;
#endif
#if SIZEOF_PTRDIFF_T
case LM_PTRDIFF_T:
ui_num = (uint64_t) 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 = (uint64_t) va_arg(ap, unsigned int);
break;
case LM_LONG_DOUBLE:
goto fmt_error;
case LM_LONG:
ui_num = (uint64_t) va_arg(ap, unsigned long int);
break;
case LM_SIZE_T:
ui_num = (uint64_t) va_arg(ap, size_t);
break;
#if SIZEOF_LONG_LONG
case LM_LONG_LONG:
ui_num = (uint64_t) va_arg(ap, unsigned long long int);
break;
#endif
#if SIZEOF_INTMAX_T
case LM_INTMAX_T:
ui_num = (uint64_t) va_arg(ap, uintmax_t);
break;
#endif
#if SIZEOF_PTRDIFF_T
case LM_PTRDIFF_T:
ui_num = (uint64_t) 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 && i_num != 0) {
*--s = *fmt; /* 'x' or 'X' */
*--s = '0';
s_len += 2;
}
break;
case 's':
s = va_arg(ap, char *);
if (s != NULL) {
s_len = strlen(s);
if (adjust_precision && (size_t)precision < s_len) {
s_len = 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 ZTS
localeconv_r(&lconv);
#else
if (!lconv) {
lconv = localeconv();
}
#endif
s = php_conv_fp((*fmt == 'f')?'F':*fmt, fp_num, alternate_form,
(adjust_precision == false) ? 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 == false) {
precision = FLOAT_DIGITS;
} else if (precision == 0) {
precision = 1;
}
/*
* * We use &num_buf[ 1 ], so that we have room for the sign
*/
#ifdef ZTS
localeconv_r(&lconv);
#else
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 *)) = cc;
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(uint64_t)) {
ui_num = (uint64_t)((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 %<char> 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 %<char> (like syslog).
* Note that we can't point s inside fmt because the
* unknown <char> could be preceded by width etc.
*/
ZEND_FALLTHROUGH;
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 && (size_t)min_width > s_len) {
if (pad_char == '0' && prefix_char != NUL) {
INS_CHAR(*s, sp, bep, cc)
s++;
s_len--;
min_width--;
}
PAD(min_width, s_len, pad_char);
}
/*
* Print the string s.
*/
for (i = s_len; i != 0; i--) {
INS_CHAR(*s, sp, bep, cc);
s++;
}
if (adjust_width && adjust == LEFT && (size_t)min_width > s_len)
PAD(min_width, s_len, pad_char);
zend_tmp_string_release(tmp_str);
}
skip_output:
fmt++;
}
odp->nextb = sp;
return (cc);
}
/* }}} */
/*
* This is the general purpose conversion function.
*/
static size_t strx_printv(char *buf, size_t len, const char *format, va_list ap) /* {{{ */
{
buffy od;
size_t cc;
/*
* First initialize the descriptor
* Notice that if no length is given, we initialize buf_end to the
* highest possible address.
*/
if (len == 0) {
od.buf_end = (char *) ~0;
od.nextb = (char *) ~0;
} else {
od.buf_end = &buf[len-1];
od.nextb = buf;
}
/*
* Do the conversion
*/
cc = format_converter(&od, format, ap);
if (len != 0 && od.nextb <= od.buf_end) {
*(od.nextb) = '\0';
}
return cc;
}
/* }}} */
PHPAPI int ap_php_slprintf(char *buf, size_t len, const char *format,...) /* {{{ */
{
size_t cc;
va_list ap;
va_start(ap, format);
cc = strx_printv(buf, len, format, ap);
va_end(ap);
if (cc >= len) {
cc = len -1;
buf[cc] = '\0';
}
return (int) cc;
}
/* }}} */
PHPAPI int ap_php_vslprintf(char *buf, size_t len, const char *format, va_list ap) /* {{{ */
{
size_t cc = strx_printv(buf, len, format, ap);
if (cc >= len) {
cc = len -1;
buf[cc] = '\0';
}
return (int) cc;
}
/* }}} */
PHPAPI int ap_php_snprintf(char *buf, size_t len, const char *format,...) /* {{{ */
{
size_t cc;
va_list ap;
va_start(ap, format);
cc = strx_printv(buf, len, format, ap);
va_end(ap);
return (int) cc;
}
/* }}} */
PHPAPI int ap_php_vsnprintf(char *buf, size_t len, const char *format, va_list ap) /* {{{ */
{
size_t cc = strx_printv(buf, len, format, ap);
return (int) cc;
}
/* }}} */
PHPAPI int ap_php_vasprintf(char **buf, const char *format, va_list ap) /* {{{ */
{
va_list ap2;
int cc;
va_copy(ap2, ap);
cc = ap_php_vsnprintf(NULL, 0, format, ap2);
va_end(ap2);
*buf = NULL;
if (cc >= 0) {
if ((*buf = malloc(++cc)) != NULL) {
if ((cc = ap_php_vsnprintf(*buf, cc, format, ap)) < 0) {
free(*buf);
*buf = NULL;
}
}
}
return cc;
}
/* }}} */
PHPAPI int ap_php_asprintf(char **buf, const char *format, ...) /* {{{ */
{
int cc;
va_list ap;
va_start(ap, format);
cc = vasprintf(buf, format, ap);
va_end(ap);
return cc;
}
/* }}} */
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