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php-src/ext/standard/formatted_print.c
Xinchen Hui a666285bc2 Happy New Year
2013-01-01 16:37:09 +08:00

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2013 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: 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>
#define LCONV_DECIMAL_POINT (*lconv->decimal_point)
#else
#define LCONV_DECIMAL_POINT '.'
#endif
#define ALIGN_LEFT 0
#define ALIGN_RIGHT 1
#define ADJ_WIDTH 1
#define ADJ_PRECISION 2
#define NUM_BUF_SIZE 500
#define FLOAT_PRECISION 6
#define MAX_FLOAT_PRECISION 53
#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";
/* php_spintf_appendchar() {{{ */
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;
}
/* }}} */
/* php_spintf_appendstring() {{{ */
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 neg, int expprec, int always_sign)
{
register int npad;
int req_size;
int copy_len;
int m_width;
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));
m_width = MAX(min_width, copy_len);
if(m_width > INT_MAX - *pos - 1) {
zend_error_noreturn(E_ERROR, "Field width %d is too long", m_width);
}
req_size = *pos + m_width + 1;
if (req_size > *size) {
while (req_size > *size) {
if(*size > INT_MAX/2) {
zend_error_noreturn(E_ERROR, "Field width %d is too long", req_size);
}
*size <<= 1;
}
PRINTF_DEBUG(("sprintf ereallocing buffer to %d bytes\n", *size));
*buffer = erealloc(*buffer, *size);
}
if (alignment == ALIGN_RIGHT) {
if ((neg || always_sign) && padding=='0') {
(*buffer)[(*pos)++] = (neg) ? '-' : '+';
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;
}
}
}
/* }}} */
/* php_spintf_appendint() {{{ */
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, always_sign);
}
/* }}} */
/* php_spintf_appenduint() {{{ */
inline static void
php_sprintf_appenduint(char **buffer, int *pos, int *size,
unsigned long number,
int width, char padding, int alignment)
{
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 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);
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, 0);
}
/* }}} */
/* php_spintf_appenddouble() {{{ */
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 num_buf[NUM_BUF_SIZE];
char *s = NULL;
int s_len = 0, is_negative = 0;
#ifdef HAVE_LOCALE_H
struct lconv *lconv;
#endif
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) {
php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Requested precision of %d digits was truncated to PHP maximum of %d digits", precision, MAX_FLOAT_PRECISION);
precision = MAX_FLOAT_PRECISION;
}
if (zend_isnan(number)) {
is_negative = (number<0);
php_sprintf_appendstring(buffer, pos, size, "NaN", 3, 0, padding,
alignment, 3, is_negative, 0, always_sign);
return;
}
if (zend_isinf(number)) {
is_negative = (number<0);
php_sprintf_appendstring(buffer, pos, size, "INF", 3, 0, padding,
alignment, 3, is_negative, 0, always_sign);
return;
}
switch (fmt) {
case 'e':
case 'E':
case 'f':
case 'F':
#ifdef HAVE_LOCALE_H
lconv = localeconv();
#endif
s = php_conv_fp((fmt == 'f')?'F':fmt, number, 0, precision,
(fmt == 'f')?LCONV_DECIMAL_POINT:'.',
&is_negative, &num_buf[1], &s_len);
if (is_negative) {
num_buf[0] = '-';
s = num_buf;
s_len++;
} else if (always_sign) {
num_buf[0] = '+';
s = num_buf;
s_len++;
}
break;
case 'g':
case 'G':
if (precision == 0)
precision = 1;
/*
* * We use &num_buf[ 1 ], so that we have room for the sign
*/
#ifdef HAVE_LOCALE_H
lconv = localeconv();
#endif
s = php_gcvt(number, precision, LCONV_DECIMAL_POINT, (fmt == 'G')?'E':'e', &num_buf[1]);
is_negative = 0;
if (*s == '-') {
is_negative = 1;
s = &num_buf[1];
} else if (always_sign) {
num_buf[0] = '+';
s = num_buf;
}
s_len = strlen(s);
break;
}
php_sprintf_appendstring(buffer, pos, size, s, width, 0, padding,
alignment, s_len, is_negative, 0, always_sign);
}
/* }}} */
/* php_spintf_appendd2n() {{{ */
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, 0);
}
/* }}} */
/* php_spintf_getnumber() {{{ */
inline static int
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;
if (num >= INT_MAX || num < 0) {
return -1;
} else {
return (int) 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, currarg, adjusting, argnum, width, precision;
char *format, *result, padding;
int always_sign;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "+", &args, &argc) == FAILURE) {
return NULL;
}
/* verify the number of args */
if ((use_array && argc != (2 + format_offset))
|| (!use_array && argc < (1 + format_offset))) {
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 ***)safe_emalloc(argc, sizeof(zval *), 0);
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, multiuse = 0;
zval *tmp;
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 {
/* 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] == '$') {
argnum = php_sprintf_getnumber(format, &inpos);
if (argnum <= 0) {
efree(result);
efree(args);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Argument number must be greater than zero");
return NULL;
}
multiuse = 1;
inpos++; /* skip the '$' */
} else {
argnum = currarg++;
}
argnum += format_offset;
/* 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"));
if ((width = php_sprintf_getnumber(format, &inpos)) < 0) {
efree(result);
efree(args);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Width must be greater than zero and less than %d", INT_MAX);
return NULL;
}
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])) {
if ((precision = php_sprintf_getnumber(format, &inpos)) < 0) {
efree(result);
efree(args);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Precision must be greater than zero and less than %d", INT_MAX);
return NULL;
}
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 (argnum >= argc) {
efree(result);
efree(args);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Too few arguments");
return NULL;
}
if (format[inpos] == 'l') {
inpos++;
}
PRINTF_DEBUG(("sprintf: format character='%c'\n", format[inpos]));
/* now we expect to find a type specifier */
if (multiuse) {
MAKE_STD_ZVAL(tmp);
*tmp = **(args[argnum]);
INIT_PZVAL(tmp);
zval_copy_ctor(tmp);
} else {
SEPARATE_ZVAL(args[argnum]);
tmp = *(args[argnum]);
}
switch (format[inpos]) {
case 's': {
zval *var, var_copy;
int use_copy;
zend_make_printable_zval(tmp, &var_copy, &use_copy);
if (use_copy) {
var = &var_copy;
} else {
var = tmp;
}
php_sprintf_appendstring(&result, &outpos, &size,
Z_STRVAL_P(var),
width, precision, padding,
alignment,
Z_STRLEN_P(var),
0, expprec, 0);
if (use_copy) {
zval_dtor(&var_copy);
}
break;
}
case 'd':
convert_to_long(tmp);
php_sprintf_appendint(&result, &outpos, &size,
Z_LVAL_P(tmp),
width, padding, alignment,
always_sign);
break;
case 'u':
convert_to_long(tmp);
php_sprintf_appenduint(&result, &outpos, &size,
Z_LVAL_P(tmp),
width, padding, alignment);
break;
case 'g':
case 'G':
case 'e':
case 'E':
case 'f':
case 'F':
convert_to_double(tmp);
php_sprintf_appenddouble(&result, &outpos, &size,
Z_DVAL_P(tmp),
width, padding, alignment,
precision, adjusting,
format[inpos], always_sign
TSRMLS_CC);
break;
case 'c':
convert_to_long(tmp);
php_sprintf_appendchar(&result, &outpos, &size,
(char) Z_LVAL_P(tmp) TSRMLS_CC);
break;
case 'o':
convert_to_long(tmp);
php_sprintf_append2n(&result, &outpos, &size,
Z_LVAL_P(tmp),
width, padding, alignment, 3,
hexchars, expprec);
break;
case 'x':
convert_to_long(tmp);
php_sprintf_append2n(&result, &outpos, &size,
Z_LVAL_P(tmp),
width, padding, alignment, 4,
hexchars, expprec);
break;
case 'X':
convert_to_long(tmp);
php_sprintf_append2n(&result, &outpos, &size,
Z_LVAL_P(tmp),
width, padding, alignment, 4,
HEXCHARS, expprec);
break;
case 'b':
convert_to_long(tmp);
php_sprintf_append2n(&result, &outpos, &size,
Z_LVAL_P(tmp),
width, padding, alignment, 1,
hexchars, expprec);
break;
case '%':
php_sprintf_appendchar(&result, &outpos, &size, '%' TSRMLS_CC);
break;
default:
break;
}
if (multiuse) {
zval_ptr_dtor(&tmp);
}
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, rlen;
if ((result=php_formatted_print(ht, &len, 0, 0 TSRMLS_CC))==NULL) {
RETURN_FALSE;
}
rlen = PHPWRITE(result, len);
efree(result);
RETURN_LONG(rlen);
}
/* }}} */
/* {{{ proto int vprintf(string format, array args)
Output a formatted string */
PHP_FUNCTION(vprintf)
{
char *result;
int len, rlen;
if ((result=php_formatted_print(ht, &len, 1, 0 TSRMLS_CC))==NULL) {
RETURN_FALSE;
}
rlen = PHPWRITE(result, len);
efree(result);
RETURN_LONG(rlen);
}
/* }}} */
/* {{{ 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_parse_parameters(1 TSRMLS_CC, "r", &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);
RETURN_LONG(len);
}
/* }}} */
/* {{{ 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_parse_parameters(1 TSRMLS_CC, "r", &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);
RETURN_LONG(len);
}
/* }}} */
/*
* 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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