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php-src/ext/standard/formatted_print.c
James Cox f68c7ff249 updating license information in the headers.
2003-06-10 20:04:29 +00:00

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/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2003 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.0 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_0.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: Stig Sæther Bakken <ssb@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include <math.h> /* modf() */
#include "php.h"
#include "ext/standard/head.h"
#include "php_string.h"
#include "zend_execute.h"
#include <stdio.h>
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#define ALIGN_LEFT 0
#define ALIGN_RIGHT 1
#define ADJ_WIDTH 1
#define ADJ_PRECISION 2
#define NUM_BUF_SIZE 500
#define NDIG 80
#define FLOAT_DIGITS 6
#define FLOAT_PRECISION 6
#define MAX_FLOAT_DIGITS 38
#define MAX_FLOAT_PRECISION 40
#if 0
/* trick to control varargs functions through cpp */
# define PRINTF_DEBUG(arg) php_printf arg
#else
# define PRINTF_DEBUG(arg)
#endif
static char hexchars[] = "0123456789abcdef";
static char HEXCHARS[] = "0123456789ABCDEF";
/*
* cvt.c - IEEE floating point formatting routines for FreeBSD
* from GNU libc-4.6.27
*/
/*
* php_convert_to_decimal converts to decimal
* the number of digits is specified by ndigit
* decpt is set to the position of the decimal point
* sign is set to 0 for positive, 1 for negative
*/
static char *php_convert_to_decimal(double arg, int ndigits, int *decpt, int *sign, int eflag)
{
register int r2;
double fi, fj;
register char *p, *p1;
/*THREADX*/
#ifndef THREAD_SAFE
static char cvt_buf[NDIG];
#endif
if (ndigits >= NDIG - 1)
ndigits = NDIG - 2;
r2 = 0;
*sign = 0;
p = &cvt_buf[0];
if (arg < 0) {
*sign = 1;
arg = -arg;
}
arg = modf(arg, &fi);
p1 = &cvt_buf[NDIG];
/*
* Do integer part
*/
if (fi != 0) {
p1 = &cvt_buf[NDIG];
while (fi != 0) {
fj = modf(fi / 10, &fi);
*--p1 = (int) ((fj + .03) * 10) + '0';
r2++;
}
while (p1 < &cvt_buf[NDIG])
*p++ = *p1++;
} else if (arg > 0) {
while ((fj = arg * 10.0) < 0.9999999) {
arg = fj;
r2--;
}
}
p1 = &cvt_buf[ndigits];
if (eflag == 0)
p1 += r2;
*decpt = r2;
if (p1 < &cvt_buf[0]) {
cvt_buf[0] = '\0';
return (cvt_buf);
}
while (p <= p1 && p < &cvt_buf[NDIG]) {
arg *= 10;
arg = modf(arg, &fj);
*p++ = (int) fj + '0';
}
if (p1 >= &cvt_buf[NDIG]) {
cvt_buf[NDIG - 1] = '\0';
return (cvt_buf);
}
p = p1;
*p1 += 5;
while (*p1 > '9') {
*p1 = '0';
if (p1 > cvt_buf)
++ * --p1;
else {
*p1 = '1';
(*decpt)++;
if (eflag == 0) {
if (p > cvt_buf)
*p = '0';
p++;
}
}
}
*p = '\0';
return (cvt_buf);
}
inline static void
php_sprintf_appendchar(char **buffer, int *pos, int *size, char add TSRMLS_DC)
{
if ((*pos + 1) >= *size) {
*size <<= 1;
PRINTF_DEBUG(("%s(): ereallocing buffer to %d bytes\n", get_active_function_name(TSRMLS_C), *size));
*buffer = erealloc(*buffer, *size);
}
PRINTF_DEBUG(("sprintf: appending '%c', pos=\n", add, *pos));
(*buffer)[(*pos)++] = add;
}
inline static void
php_sprintf_appendstring(char **buffer, int *pos, int *size, char *add,
int min_width, int max_width, char padding,
int alignment, int len, int sign, int expprec)
{
register int npad;
int req_size;
int copy_len;
copy_len = (expprec ? MIN(max_width, len) : len);
npad = min_width - copy_len;
if (npad < 0) {
npad = 0;
}
PRINTF_DEBUG(("sprintf: appendstring(%x, %d, %d, \"%s\", %d, '%c', %d)\n",
*buffer, *pos, *size, add, min_width, padding, alignment));
req_size = *pos + MAX(min_width, copy_len) + 1;
if (req_size > *size) {
while (req_size > *size) {
*size <<= 1;
}
PRINTF_DEBUG(("sprintf ereallocing buffer to %d bytes\n", *size));
*buffer = erealloc(*buffer, *size);
}
if (alignment == ALIGN_RIGHT) {
if (sign && padding=='0') {
(*buffer)[(*pos)++] = '-';
add++;
len--;
copy_len--;
}
while (npad-- > 0) {
(*buffer)[(*pos)++] = padding;
}
}
PRINTF_DEBUG(("sprintf: appending \"%s\"\n", add));
memcpy(&(*buffer)[*pos], add, copy_len + 1);
*pos += copy_len;
if (alignment == ALIGN_LEFT) {
while (npad--) {
(*buffer)[(*pos)++] = padding;
}
}
}
inline static void
php_sprintf_appendint(char **buffer, int *pos, int *size, long number,
int width, char padding, int alignment,
int always_sign)
{
char numbuf[NUM_BUF_SIZE];
register unsigned long magn, nmagn;
register unsigned int i = NUM_BUF_SIZE - 1, neg = 0;
PRINTF_DEBUG(("sprintf: appendint(%x, %x, %x, %d, %d, '%c', %d)\n",
*buffer, pos, size, number, width, padding, alignment));
if (number < 0) {
neg = 1;
magn = ((unsigned long) -(number + 1)) + 1;
} else {
magn = (unsigned long) number;
}
/* Can't right-pad 0's on integers */
if(alignment==0 && padding=='0') padding=' ';
numbuf[i] = '\0';
do {
nmagn = magn / 10;
numbuf[--i] = (unsigned char)(magn - (nmagn * 10)) + '0';
magn = nmagn;
}
while (magn > 0 && i > 0);
if (neg) {
numbuf[--i] = '-';
} else if (always_sign) {
numbuf[--i] = '+';
}
PRINTF_DEBUG(("sprintf: appending %d as \"%s\", i=%d\n",
number, &numbuf[i], i));
php_sprintf_appendstring(buffer, pos, size, &numbuf[i], width, 0,
padding, alignment, (NUM_BUF_SIZE - 1) - i,
neg, 0);
}
inline static void
php_sprintf_appenduint(char **buffer, int *pos, int *size,
unsigned long number,
int width, char padding, int alignment, int always_sign)
{
char numbuf[NUM_BUF_SIZE];
register unsigned long magn, nmagn;
register unsigned int i = NUM_BUF_SIZE - 1;
PRINTF_DEBUG(("sprintf: appenduint(%x, %x, %x, %d, %d, '%c', %d)\n",
*buffer, pos, size, number, width, padding, alignment));
magn = (unsigned int) number;
/* Can't right-pad 0's on integers */
if (alignment == 0 && padding == '0') padding = ' ';
numbuf[i] = '\0';
do {
nmagn = magn / 10;
numbuf[--i] = (unsigned char)(magn - (nmagn * 10)) + '0';
magn = nmagn;
} while (magn > 0 && i > 0);
if (always_sign)
numbuf[--i] = '+';
PRINTF_DEBUG(("sprintf: appending %d as \"%s\", i=%d\n", number, &numbuf[i], i));
php_sprintf_appendstring(buffer, pos, size, &numbuf[i], width, 0,
padding, alignment, (NUM_BUF_SIZE - 1) - i, 0, 0);
}
inline static void
php_sprintf_appenddouble(char **buffer, int *pos,
int *size, double number,
int width, char padding,
int alignment, int precision,
int adjust, char fmt,
int always_sign
TSRMLS_DC)
{
char numbuf[NUM_BUF_SIZE];
char *cvt;
register int i = 0, j = 0;
int sign, decpt;
char decimal_point = EG(float_separator)[0];
PRINTF_DEBUG(("sprintf: appenddouble(%x, %x, %x, %f, %d, '%c', %d, %c)\n",
*buffer, pos, size, number, width, padding, alignment, fmt));
if ((adjust & ADJ_PRECISION) == 0) {
precision = FLOAT_PRECISION;
} else if (precision > MAX_FLOAT_PRECISION) {
precision = MAX_FLOAT_PRECISION;
}
if (zend_isnan(number)) {
sign = (number<0);
php_sprintf_appendstring(buffer, pos, size, "NaN", 3, 0, padding,
alignment, precision, sign, 0);
return;
}
if (zend_isinf(number)) {
sign = (number<0);
php_sprintf_appendstring(buffer, pos, size, "INF", 3, 0, padding,
alignment, precision, sign, 0);
return;
}
cvt = php_convert_to_decimal(number, precision, &decpt, &sign, (fmt == 'e'));
if (sign) {
numbuf[i++] = '-';
} else if (always_sign) {
numbuf[i++] = '+';
}
if (fmt == 'f') {
if (decpt <= 0) {
numbuf[i++] = '0';
if (precision > 0) {
int k = precision;
numbuf[i++] = decimal_point;
while ((decpt++ < 0) && k--) {
numbuf[i++] = '0';
}
}
} else {
while (decpt-- > 0)
numbuf[i++] = cvt[j++];
if (precision > 0)
numbuf[i++] = decimal_point;
}
} else if (fmt == 'e' || fmt == 'E') {
char *exp_p;
int dec2;
decpt--;
numbuf[i++] = cvt[j++];
numbuf[i++] = decimal_point;
if (precision > 0) {
int k = precision;
while (k-- && cvt[j]) {
numbuf[i++] = cvt[j++];
}
} else {
numbuf[i++] = '0';
}
numbuf[i++] = fmt;
exp_p = php_convert_to_decimal(decpt, 0, &dec2, &sign, 0);
numbuf[i++] = sign ? '-' : '+';
if (*exp_p) {
while (*exp_p) {
numbuf[i++] = *(exp_p++);
}
} else {
numbuf[i++] = '0';
}
} else {
numbuf[i++] = cvt[j++];
if (precision > 0)
numbuf[i++] = decimal_point;
}
while (cvt[j]) {
numbuf[i++] = cvt[j++];
}
numbuf[i] = '\0';
if (precision > 0) {
width += (precision + 1);
}
php_sprintf_appendstring(buffer, pos, size, numbuf, width, 0, padding,
alignment, i, sign, 0);
}
inline static void
php_sprintf_append2n(char **buffer, int *pos, int *size, long number,
int width, char padding, int alignment, int n,
char *chartable, int expprec)
{
char numbuf[NUM_BUF_SIZE];
register unsigned long num;
register unsigned int i = NUM_BUF_SIZE - 1;
register int andbits = (1 << n) - 1;
PRINTF_DEBUG(("sprintf: append2n(%x, %x, %x, %d, %d, '%c', %d, %d, %x)\n",
*buffer, pos, size, number, width, padding, alignment, n,
chartable));
PRINTF_DEBUG(("sprintf: append2n 2^%d andbits=%x\n", n, andbits));
num = (unsigned long) number;
numbuf[i] = '\0';
do {
numbuf[--i] = chartable[(num & andbits)];
num >>= n;
}
while (num > 0);
php_sprintf_appendstring(buffer, pos, size, &numbuf[i], width, 0,
padding, alignment, (NUM_BUF_SIZE - 1) - i,
0, expprec);
}
inline static long
php_sprintf_getnumber(char *buffer, int *pos)
{
char *endptr;
register long num = strtol(&buffer[*pos], &endptr, 10);
register int i = 0;
if (endptr != NULL) {
i = (endptr - &buffer[*pos]);
}
PRINTF_DEBUG(("sprintf_getnumber: number was %d bytes long\n", i));
*pos += i;
return num;
}
/* {{{ php_formatted_print
* New sprintf implementation for PHP.
*
* Modifiers:
*
* " " pad integers with spaces
* "-" left adjusted field
* n field size
* "."n precision (floats only)
* "+" Always place a sign (+ or -) in front of a number
*
* Type specifiers:
*
* "%" literal "%", modifiers are ignored.
* "b" integer argument is printed as binary
* "c" integer argument is printed as a single character
* "d" argument is an integer
* "f" the argument is a float
* "o" integer argument is printed as octal
* "s" argument is a string
* "x" integer argument is printed as lowercase hexadecimal
* "X" integer argument is printed as uppercase hexadecimal
*
*/
static char *
php_formatted_print(int ht, int *len, int use_array, int format_offset TSRMLS_DC)
{
zval ***args, **z_format;
int argc, size = 240, inpos = 0, outpos = 0, temppos;
int alignment, width, precision, currarg, adjusting, argnum;
char *format, *result, padding;
int always_sign;
argc = ZEND_NUM_ARGS();
/* verify the number of args */
if ((use_array && argc != (2 + format_offset))
|| (!use_array && argc < (1 + format_offset))) {
WRONG_PARAM_COUNT_WITH_RETVAL(NULL);
}
args = (zval ***)emalloc(argc * sizeof(zval *));
if (zend_get_parameters_array_ex(argc, args) == FAILURE) {
efree(args);
WRONG_PARAM_COUNT_WITH_RETVAL(NULL);
}
if (use_array) {
int i = 1;
zval ***newargs;
zval **array;
z_format = args[format_offset];
array = args[1 + format_offset];
SEPARATE_ZVAL(array);
convert_to_array_ex(array);
argc = 1 + zend_hash_num_elements(Z_ARRVAL_PP(array));
newargs = (zval ***)emalloc(argc * sizeof(zval *));
newargs[0] = z_format;
for (zend_hash_internal_pointer_reset(Z_ARRVAL_PP(array));
zend_hash_get_current_data(Z_ARRVAL_PP(array), (void **)&newargs[i++]) == SUCCESS;
zend_hash_move_forward(Z_ARRVAL_PP(array)));
efree(args);
args = newargs;
format_offset = 0;
}
convert_to_string_ex(args[format_offset]);
format = Z_STRVAL_PP(args[format_offset]);
result = emalloc(size);
currarg = 1;
while (inpos<Z_STRLEN_PP(args[format_offset])) {
int expprec = 0;
PRINTF_DEBUG(("sprintf: format[%d]='%c'\n", inpos, format[inpos]));
PRINTF_DEBUG(("sprintf: outpos=%d\n", outpos));
if (format[inpos] != '%') {
php_sprintf_appendchar(&result, &outpos, &size, format[inpos++] TSRMLS_CC);
} else if (format[inpos + 1] == '%') {
php_sprintf_appendchar(&result, &outpos, &size, '%' TSRMLS_CC);
inpos += 2;
} else {
if (currarg >= argc && format[inpos + 1] != '%') {
efree(result);
efree(args);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Too few arguments");
return NULL;
}
/* starting a new format specifier, reset variables */
alignment = ALIGN_RIGHT;
adjusting = 0;
padding = ' ';
always_sign = 0;
inpos++; /* skip the '%' */
PRINTF_DEBUG(("sprintf: first looking at '%c', inpos=%d\n",
format[inpos], inpos));
if (isascii((int)format[inpos]) && !isalpha((int)format[inpos])) {
/* first look for argnum */
temppos = inpos;
while (isdigit((int)format[temppos])) temppos++;
if (format[temppos] == '$') {
argnum = php_sprintf_getnumber(format, &inpos);
if (argnum == 0) {
efree(result);
efree(args);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Zero is not a valid argument number");
return NULL;
}
inpos++; /* skip the '$' */
} else {
argnum = currarg++;
}
argnum += format_offset;
if (argnum >= argc) {
efree(result);
efree(args);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Too few arguments");
return NULL;
}
/* after argnum comes modifiers */
PRINTF_DEBUG(("sprintf: looking for modifiers\n"
"sprintf: now looking at '%c', inpos=%d\n",
format[inpos], inpos));
for (;; inpos++) {
if (format[inpos] == ' ' || format[inpos] == '0') {
padding = format[inpos];
} else if (format[inpos] == '-') {
alignment = ALIGN_LEFT;
/* space padding, the default */
} else if (format[inpos] == '+') {
always_sign = 1;
} else if (format[inpos] == '\'') {
padding = format[++inpos];
} else {
PRINTF_DEBUG(("sprintf: end of modifiers\n"));
break;
}
}
PRINTF_DEBUG(("sprintf: padding='%c'\n", padding));
PRINTF_DEBUG(("sprintf: alignment=%s\n",
(alignment == ALIGN_LEFT) ? "left" : "right"));
/* after modifiers comes width */
if (isdigit((int)format[inpos])) {
PRINTF_DEBUG(("sprintf: getting width\n"));
width = php_sprintf_getnumber(format, &inpos);
adjusting |= ADJ_WIDTH;
} else {
width = 0;
}
PRINTF_DEBUG(("sprintf: width=%d\n", width));
/* after width and argnum comes precision */
if (format[inpos] == '.') {
inpos++;
PRINTF_DEBUG(("sprintf: getting precision\n"));
if (isdigit((int)format[inpos])) {
precision = php_sprintf_getnumber(format, &inpos);
adjusting |= ADJ_PRECISION;
expprec = 1;
} else {
precision = 0;
}
} else {
precision = 0;
}
PRINTF_DEBUG(("sprintf: precision=%d\n", precision));
} else {
width = precision = 0;
argnum = currarg++ + format_offset;
}
if (format[inpos] == 'l') {
inpos++;
}
PRINTF_DEBUG(("sprintf: format character='%c'\n", format[inpos]));
/* now we expect to find a type specifier */
switch (format[inpos]) {
case 's':
convert_to_string_ex(args[argnum]);
php_sprintf_appendstring(&result, &outpos, &size,
Z_STRVAL_PP(args[argnum]),
width, precision, padding,
alignment,
Z_STRLEN_PP(args[argnum]),
0, expprec);
break;
case 'd':
convert_to_long_ex(args[argnum]);
php_sprintf_appendint(&result, &outpos, &size,
Z_LVAL_PP(args[argnum]),
width, padding, alignment,
always_sign);
break;
case 'u':
convert_to_long_ex(args[argnum]);
php_sprintf_appenduint(&result, &outpos, &size,
Z_LVAL_PP(args[argnum]),
width, padding, alignment,
always_sign);
break;
case 'e':
case 'f':
/* XXX not done */
convert_to_double_ex(args[argnum]);
php_sprintf_appenddouble(&result, &outpos, &size,
Z_DVAL_PP(args[argnum]),
width, padding, alignment,
precision, adjusting,
format[inpos], always_sign
TSRMLS_CC);
break;
case 'c':
convert_to_long_ex(args[argnum]);
php_sprintf_appendchar(&result, &outpos, &size,
(char) Z_LVAL_PP(args[argnum]) TSRMLS_CC);
break;
case 'o':
convert_to_long_ex(args[argnum]);
php_sprintf_append2n(&result, &outpos, &size,
Z_LVAL_PP(args[argnum]),
width, padding, alignment, 3,
hexchars, expprec);
break;
case 'x':
convert_to_long_ex(args[argnum]);
php_sprintf_append2n(&result, &outpos, &size,
Z_LVAL_PP(args[argnum]),
width, padding, alignment, 4,
hexchars, expprec);
break;
case 'X':
convert_to_long_ex(args[argnum]);
php_sprintf_append2n(&result, &outpos, &size,
Z_LVAL_PP(args[argnum]),
width, padding, alignment, 4,
HEXCHARS, expprec);
break;
case 'b':
convert_to_long_ex(args[argnum]);
php_sprintf_append2n(&result, &outpos, &size,
Z_LVAL_PP(args[argnum]),
width, padding, alignment, 1,
hexchars, expprec);
break;
case '%':
php_sprintf_appendchar(&result, &outpos, &size, '%' TSRMLS_CC);
break;
default:
break;
}
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, 0, 0 TSRMLS_CC))==NULL) {
RETURN_FALSE;
}
RETVAL_STRINGL(result, len, 0);
}
/* }}} */
/* {{{ proto string vsprintf(string format, array args)
Return a formatted string */
PHP_FUNCTION(vsprintf)
{
char *result;
int len;
if ((result=php_formatted_print(ht, &len, 1, 0 TSRMLS_CC))==NULL) {
RETURN_FALSE;
}
RETVAL_STRINGL(result, len, 0);
}
/* }}} */
/* {{{ 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, 0, 0 TSRMLS_CC))==NULL) {
RETURN_FALSE;
}
PHPWRITE(result, len);
efree(result);
}
/* }}} */
/* {{{ proto int vprintf(string format, array args)
Output a formatted string */
PHP_FUNCTION(vprintf)
{
char *result;
int len;
if ((result=php_formatted_print(ht, &len, 1, 0 TSRMLS_CC))==NULL) {
RETURN_FALSE;
}
PHPWRITE(result, len);
efree(result);
}
/* }}} */
/* {{{ proto int fprintf(resource stream, string format [, mixed arg1 [, mixed ...]])
Output a formatted string into a stream */
PHP_FUNCTION(fprintf)
{
php_stream *stream;
zval **arg1;
char *result;
int len;
if (ZEND_NUM_ARGS() < 2) {
WRONG_PARAM_COUNT;
}
if (zend_get_parameters_ex(1, &arg1)==FAILURE) {
RETURN_FALSE;
}
php_stream_from_zval(stream, arg1);
if ((result=php_formatted_print(ht, &len, 0, 1 TSRMLS_CC))==NULL) {
RETURN_FALSE;
}
php_stream_write(stream, result, len);
efree(result);
RETVAL_LONG(len - 1);
}
/* {{{ proto int vfprintf(resource stream, string format, array args)
Output a formatted string into a stream */
PHP_FUNCTION(vfprintf)
{
php_stream *stream;
zval **arg1;
char *result;
int len;
if (ZEND_NUM_ARGS() != 3) {
WRONG_PARAM_COUNT;
}
if (zend_get_parameters_ex(1, &arg1)==FAILURE) {
RETURN_FALSE;
}
php_stream_from_zval(stream, arg1);
if ((result=php_formatted_print(ht, &len, 1, 1 TSRMLS_CC))==NULL) {
RETURN_FALSE;
}
php_stream_write(stream, result, len);
efree(result);
RETVAL_LONG(len - 1);
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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