mirror of
https://github.com/php/php-src.git
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604 lines
15 KiB
C
604 lines
15 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP version 4.0 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997, 1998, 1999, 2000 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.02 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available at through the world-wide-web at |
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| http://www.php.net/license/2_02.txt. |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Stig Sæther Bakken <ssb@guardian.no> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include <math.h> /* modf() */
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#include "php.h"
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#include "ext/standard/head.h"
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#include "php_string.h"
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#include "zend_execute.h"
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#include <stdio.h>
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#define ALIGN_LEFT 0
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#define ALIGN_RIGHT 1
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#define ADJ_WIDTH 1
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#define ADJ_PRECISION 2
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#define NUM_BUF_SIZE 500
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#define NDIG 80
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#define FLOAT_DIGITS 6
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#define FLOAT_PRECISION 6
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#define MAX_FLOAT_DIGITS 38
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#define MAX_FLOAT_PRECISION 40
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#if 0
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/* trick to control varargs functions through cpp */
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# define PRINTF_DEBUG(arg) php_printf arg
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#else
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# define PRINTF_DEBUG(arg)
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#endif
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static char hexchars[] = "0123456789abcdef";
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static char HEXCHARS[] = "0123456789ABCDEF";
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/*
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* cvt.c - IEEE floating point formatting routines for FreeBSD
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* from GNU libc-4.6.27
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*/
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/*
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* php_convert_to_decimal converts to decimal
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* the number of digits is specified by ndigit
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* decpt is set to the position of the decimal point
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* sign is set to 0 for positive, 1 for negative
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*/
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static char *php_convert_to_decimal(double arg, int ndigits, int *decpt, int *sign, int eflag)
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{
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register int r2;
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double fi, fj;
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register char *p, *p1;
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/*THREADX*/
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#ifndef THREAD_SAFE
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static char cvt_buf[NDIG];
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#endif
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if (ndigits >= NDIG - 1)
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ndigits = NDIG - 2;
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r2 = 0;
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*sign = 0;
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p = &cvt_buf[0];
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if (arg < 0) {
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*sign = 1;
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arg = -arg;
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}
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arg = modf(arg, &fi);
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p1 = &cvt_buf[NDIG];
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/*
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* Do integer part
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*/
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if (fi != 0) {
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p1 = &cvt_buf[NDIG];
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while (fi != 0) {
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fj = modf(fi / 10, &fi);
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*--p1 = (int) ((fj + .03) * 10) + '0';
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r2++;
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}
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while (p1 < &cvt_buf[NDIG])
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*p++ = *p1++;
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} else if (arg > 0) {
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while ((fj = arg * 10) < 1) {
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arg = fj;
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r2--;
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}
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}
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p1 = &cvt_buf[ndigits];
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if (eflag == 0)
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p1 += r2;
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*decpt = r2;
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if (p1 < &cvt_buf[0]) {
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cvt_buf[0] = '\0';
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return (cvt_buf);
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}
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while (p <= p1 && p < &cvt_buf[NDIG]) {
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arg *= 10;
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arg = modf(arg, &fj);
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*p++ = (int) fj + '0';
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}
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if (p1 >= &cvt_buf[NDIG]) {
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cvt_buf[NDIG - 1] = '\0';
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return (cvt_buf);
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}
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p = p1;
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*p1 += 5;
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while (*p1 > '9') {
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*p1 = '0';
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if (p1 > cvt_buf)
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++ * --p1;
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else {
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*p1 = '1';
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(*decpt)++;
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if (eflag == 0) {
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if (p > cvt_buf)
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*p = '0';
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p++;
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}
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}
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}
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*p = '\0';
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return (cvt_buf);
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}
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inline static void
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php_sprintf_appendchar(char **buffer, int *pos, int *size, char add)
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{
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if ((*pos + 1) >= *size) {
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*size <<= 1;
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PRINTF_DEBUG(("%s: ereallocing buffer to %d bytes\n", get_active_function_name(), *size));
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*buffer = erealloc(*buffer, *size);
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}
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PRINTF_DEBUG(("sprintf: appending '%c', pos=\n", add, *pos));
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(*buffer)[(*pos)++] = add;
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}
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inline static void
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php_sprintf_appendstring(char **buffer, int *pos, int *size, char *add,
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int min_width, int max_width, char padding,
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int alignment, int len, int sign, int expprec)
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{
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register int npad;
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npad = min_width - MIN(len, (expprec ? max_width : len));
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if (npad < 0) {
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npad = 0;
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}
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PRINTF_DEBUG(("sprintf: appendstring(%x, %d, %d, \"%s\", %d, '%c', %d)\n",
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*buffer, *pos, *size, add, min_width, padding, alignment));
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if ((max_width == 0) && (! expprec)) {
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max_width = MAX(min_width, len);
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}
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if ((*pos + max_width) >= *size) {
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while ((*pos + max_width) >= *size) {
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*size <<= 1;
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}
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PRINTF_DEBUG(("sprintf ereallocing buffer to %d bytes\n", *size));
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*buffer = erealloc(*buffer, *size);
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}
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if (alignment == ALIGN_RIGHT) {
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if (sign && padding=='0') {
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(*buffer)[(*pos)++] = '-';
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add++;
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len--;
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}
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while (npad-- > 0) {
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(*buffer)[(*pos)++] = padding;
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}
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}
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PRINTF_DEBUG(("sprintf: appending \"%s\"\n", add));
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strncpy(&(*buffer)[*pos], add, max_width);
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*pos += MIN(max_width, len);
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if (alignment == ALIGN_LEFT) {
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while (npad--) {
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(*buffer)[(*pos)++] = padding;
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}
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}
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}
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inline static void
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php_sprintf_appendint(char **buffer, int *pos, int *size, int number,
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int width, char padding, int alignment)
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{
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char numbuf[NUM_BUF_SIZE];
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register unsigned int magn, nmagn, i = NUM_BUF_SIZE - 1, neg = 0;
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PRINTF_DEBUG(("sprintf: appendint(%x, %x, %x, %d, %d, '%c', %d)\n",
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*buffer, pos, size, number, width, padding, alignment));
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if (number < 0) {
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neg = 1;
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magn = ((unsigned int) -(number + 1)) + 1;
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} else {
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magn = (unsigned int) number;
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}
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/* Can't right-pad 0's on integers */
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if(alignment==0 && padding=='0') padding=' ';
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numbuf[i] = '\0';
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do {
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nmagn = magn / 10;
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numbuf[--i] = (magn - (nmagn * 10)) + '0';
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magn = nmagn;
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}
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while (magn > 0 && i > 0);
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if (neg) {
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numbuf[--i] = '-';
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}
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PRINTF_DEBUG(("sprintf: appending %d as \"%s\", i=%d\n",
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number, &numbuf[i], i));
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php_sprintf_appendstring(buffer, pos, size, &numbuf[i], width, 0,
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padding, alignment, (NUM_BUF_SIZE - 1) - i,
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neg, 0);
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}
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inline static void
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php_sprintf_appenddouble(char **buffer, int *pos,
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int *size, double number,
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int width, char padding,
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int alignment, int precision,
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int adjust, char fmt)
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{
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char numbuf[NUM_BUF_SIZE];
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char *cvt;
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register int i = 0, j = 0;
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int sign, decpt;
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PRINTF_DEBUG(("sprintf: appenddouble(%x, %x, %x, %f, %d, '%c', %d, %c)\n",
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*buffer, pos, size, number, width, padding, alignment, fmt));
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if ((adjust & ADJ_PRECISION) == 0) {
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precision = FLOAT_PRECISION;
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} else if (precision > MAX_FLOAT_PRECISION) {
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precision = MAX_FLOAT_PRECISION;
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}
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cvt = php_convert_to_decimal(number, precision, &decpt, &sign, (fmt == 'e'));
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if (sign) {
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numbuf[i++] = '-';
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}
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if (fmt == 'f') {
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if (decpt <= 0) {
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numbuf[i++] = '0';
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if (precision > 0) {
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int k = precision;
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numbuf[i++] = '.';
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while ((decpt++ < 0) && k--) {
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numbuf[i++] = '0';
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}
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}
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} else {
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while (decpt-- > 0)
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numbuf[i++] = cvt[j++];
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if (precision > 0)
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numbuf[i++] = '.';
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}
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} else {
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numbuf[i++] = cvt[j++];
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if (precision > 0)
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numbuf[i++] = '.';
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}
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while (cvt[j]) {
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numbuf[i++] = cvt[j++];
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}
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numbuf[i] = '\0';
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if (precision > 0) {
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width += (precision + 1);
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}
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php_sprintf_appendstring(buffer, pos, size, numbuf, width, 0, padding,
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alignment, i, sign, 0);
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}
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inline static void
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php_sprintf_append2n(char **buffer, int *pos, int *size, int number,
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int width, char padding, int alignment, int n,
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char *chartable, int expprec)
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{
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char numbuf[NUM_BUF_SIZE];
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register unsigned int num, i = NUM_BUF_SIZE - 1, neg = 0;
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register int andbits = (1 << n) - 1;
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PRINTF_DEBUG(("sprintf: append2n(%x, %x, %x, %d, %d, '%c', %d, %d, %x)\n",
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*buffer, pos, size, number, width, padding, alignment, n,
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chartable));
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PRINTF_DEBUG(("sprintf: append2n 2^%d andbits=%x\n", n, andbits));
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if (number < 0) {
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neg = 1;
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num = ((unsigned int) -(number + 1)) + 1;
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} else {
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num = (unsigned int) number;
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}
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numbuf[i] = '\0';
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do {
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numbuf[--i] = chartable[(num & andbits)];
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num >>= n;
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}
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while (num > 0);
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if (neg) {
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numbuf[--i] = '-';
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}
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php_sprintf_appendstring(buffer, pos, size, &numbuf[i], width, 0,
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padding, alignment, (NUM_BUF_SIZE - 1) - i,
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neg, expprec);
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}
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inline static int
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php_sprintf_getnumber(char *buffer, int *pos)
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{
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char *endptr;
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register int num = strtol(&buffer[*pos], &endptr, 10);
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register int i = 0;
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if (endptr != NULL) {
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i = (endptr - &buffer[*pos]);
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}
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PRINTF_DEBUG(("sprintf_getnumber: number was %d bytes long\n", i));
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*pos += i;
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return num;
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}
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/*
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* New sprintf implementation for PHP.
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*
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* Modifiers:
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*
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* " " pad integers with spaces
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* "-" left adjusted field
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* n field size
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* "."n precision (floats only)
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*
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* Type specifiers:
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*
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* "%" literal "%", modifiers are ignored.
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* "b" integer argument is printed as binary
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* "c" integer argument is printed as a single character
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* "d" argument is an integer
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* "f" the argument is a float
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* "o" integer argument is printed as octal
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* "s" argument is a string
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* "x" integer argument is printed as lowercase hexadecimal
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* "X" integer argument is printed as uppercase hexadecimal
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*
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*/
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static char *
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php_formatted_print(int ht, int *len)
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{
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pval ***args;
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int argc, size = 240, inpos = 0, outpos = 0;
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int alignment, width, precision, currarg, adjusting;
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char *format, *result, padding;
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argc = ZEND_NUM_ARGS();
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if (argc < 1) {
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WRONG_PARAM_COUNT_WITH_RETVAL(NULL);
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}
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args = (pval ***)emalloc(argc * sizeof(pval *));
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if (zend_get_parameters_array_ex(argc, args) == FAILURE) {
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efree(args);
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WRONG_PARAM_COUNT_WITH_RETVAL(NULL);
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}
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convert_to_string_ex(args[0]);
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format = (*args[0])->value.str.val;
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result = emalloc(size);
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currarg = 1;
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while (format[inpos]) {
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int expprec = 0;
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PRINTF_DEBUG(("sprintf: format[%d]='%c'\n", inpos, format[inpos]));
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PRINTF_DEBUG(("sprintf: outpos=%d\n", outpos));
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if (format[inpos] != '%') {
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php_sprintf_appendchar(&result, &outpos, &size, format[inpos++]);
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} else if (format[inpos + 1] == '%') {
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php_sprintf_appendchar(&result, &outpos, &size, '%');
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inpos += 2;
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} else {
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if (currarg >= argc && format[inpos + 1] != '%') {
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efree(result);
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efree(args);
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php_error(E_WARNING, "%s(): too few arguments",get_active_function_name());
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return NULL;
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}
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/* starting a new format specifier, reset variables */
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alignment = ALIGN_RIGHT;
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adjusting = 0;
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padding = ' ';
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inpos++; /* skip the '%' */
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PRINTF_DEBUG(("sprintf: first looking at '%c', inpos=%d\n",
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format[inpos], inpos));
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if (isascii((int)format[inpos]) && !isalpha((int)format[inpos])) {
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/* first look for modifiers */
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PRINTF_DEBUG(("sprintf: looking for modifiers\n"
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"sprintf: now looking at '%c', inpos=%d\n",
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format[inpos], inpos));
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for (;; inpos++) {
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if (format[inpos] == ' ' || format[inpos] == '0') {
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padding = format[inpos];
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} else if (format[inpos] == '-') {
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alignment = ALIGN_LEFT;
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/* space padding, the default */
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} else if (format[inpos] == '\'') {
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padding = format[++inpos];
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} else {
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PRINTF_DEBUG(("sprintf: end of modifiers\n"));
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break;
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}
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}
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PRINTF_DEBUG(("sprintf: padding='%c'\n", padding));
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PRINTF_DEBUG(("sprintf: alignment=%s\n",
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(alignment == ALIGN_LEFT) ? "left" : "right"));
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/* after modifiers comes width */
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if (isdigit((int)format[inpos])) {
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PRINTF_DEBUG(("sprintf: getting width\n"));
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width = php_sprintf_getnumber(format, &inpos);
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adjusting |= ADJ_WIDTH;
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} else {
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width = 0;
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}
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PRINTF_DEBUG(("sprintf: width=%d\n", width));
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/* after width comes precision */
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if (format[inpos] == '.') {
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inpos++;
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PRINTF_DEBUG(("sprintf: getting precision\n"));
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if (isdigit((int)format[inpos])) {
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precision = php_sprintf_getnumber(format, &inpos);
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adjusting |= ADJ_PRECISION;
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expprec = 1;
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} else {
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precision = 0;
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}
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} else {
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precision = 0;
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}
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PRINTF_DEBUG(("sprintf: precision=%d\n", precision));
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} else {
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width = precision = 0;
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}
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if (format[inpos] == 'l') {
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inpos++;
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}
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PRINTF_DEBUG(("sprintf: format character='%c'\n", format[inpos]));
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/* now we expect to find a type specifier */
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switch (format[inpos]) {
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case 's':
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convert_to_string_ex(args[currarg]);
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php_sprintf_appendstring(&result, &outpos, &size,
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(*args[currarg])->value.str.val,
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width, precision, padding,
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alignment,
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(*args[currarg])->value.str.len,
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0, expprec);
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break;
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case 'd':
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convert_to_long_ex(args[currarg]);
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php_sprintf_appendint(&result, &outpos, &size,
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(*args[currarg])->value.lval,
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width, padding, alignment);
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break;
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case 'e':
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case 'f':
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/* XXX not done */
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convert_to_double_ex(args[currarg]);
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php_sprintf_appenddouble(&result, &outpos, &size,
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(*args[currarg])->value.dval,
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width, padding, alignment,
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precision, adjusting,
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format[inpos]);
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break;
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case 'c':
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convert_to_long_ex(args[currarg]);
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php_sprintf_appendchar(&result, &outpos, &size,
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(char) (*args[currarg])->value.lval);
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break;
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case 'o':
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convert_to_long_ex(args[currarg]);
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php_sprintf_append2n(&result, &outpos, &size,
|
|
(*args[currarg])->value.lval,
|
|
width, padding, alignment, 3,
|
|
hexchars, expprec);
|
|
break;
|
|
|
|
case 'x':
|
|
convert_to_long_ex(args[currarg]);
|
|
php_sprintf_append2n(&result, &outpos, &size,
|
|
(*args[currarg])->value.lval,
|
|
width, padding, alignment, 4,
|
|
hexchars, expprec);
|
|
break;
|
|
|
|
case 'X':
|
|
convert_to_long_ex(args[currarg]);
|
|
php_sprintf_append2n(&result, &outpos, &size,
|
|
(*args[currarg])->value.lval,
|
|
width, padding, alignment, 4,
|
|
HEXCHARS, expprec);
|
|
break;
|
|
|
|
case 'b':
|
|
convert_to_long_ex(args[currarg]);
|
|
php_sprintf_append2n(&result, &outpos, &size,
|
|
(*args[currarg])->value.lval,
|
|
width, padding, alignment, 1,
|
|
hexchars, expprec);
|
|
break;
|
|
|
|
case '%':
|
|
php_sprintf_appendchar(&result, &outpos, &size, '%');
|
|
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
currarg++;
|
|
inpos++;
|
|
}
|
|
}
|
|
|
|
efree(args);
|
|
|
|
/* possibly, we have to make sure we have room for the terminating null? */
|
|
result[outpos]=0;
|
|
*len = outpos;
|
|
return result;
|
|
}
|
|
|
|
/* {{{ proto string sprintf(string format [, mixed arg1 [, mixed ...]])
|
|
Return a formatted string */
|
|
PHP_FUNCTION(user_sprintf)
|
|
{
|
|
char *result;
|
|
int len;
|
|
|
|
if ((result=php_formatted_print(ht,&len))==NULL) {
|
|
RETURN_FALSE;
|
|
}
|
|
RETVAL_STRINGL(result,len,1);
|
|
efree(result);
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ proto int printf(string format [, mixed arg1 [, mixed ...]])
|
|
Output a formatted string */
|
|
PHP_FUNCTION(user_printf)
|
|
{
|
|
char *result;
|
|
int len;
|
|
|
|
if ((result=php_formatted_print(ht,&len))==NULL) {
|
|
RETURN_FALSE;
|
|
}
|
|
PHPWRITE(result,len);
|
|
efree(result);
|
|
}
|
|
/* }}} */
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
*/
|