/
zlib.c
1242 lines (1075 loc) · 30.5 KB
/
zlib.c
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/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2001 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.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. |
+----------------------------------------------------------------------+
| Authors: Rasmus Lerdorf <rasmus@lerdorf.on.ca> |
| Stefan Röhrich <sr@linux.de> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#define IS_EXT_MODULE
#include "php.h"
#include "SAPI.h"
#include "php_ini.h"
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef PHP_WIN32
#include <windows.h>
#include <winsock.h>
#define O_RDONLY _O_RDONLY
#include "win32/param.h"
#else
#include <sys/param.h>
/* #include <sys/uio.h> */
#endif
#include "ext/standard/head.h"
#include "safe_mode.h"
#include "ext/standard/php_standard.h"
#include "ext/standard/info.h"
#include "php_zlib.h"
#include "fopen_wrappers.h"
#if HAVE_PWD_H
#ifdef PHP_WIN32
#include "win32/pwd.h"
#else
#include <pwd.h>
#endif
#endif
#if defined(HAVE_UNISTD_H) && defined(PHP_WIN32)
#undef HAVE_UNISTD_H
#endif
#ifdef COMPILE_DL_ZLIB
#ifndef PUTS
#define PUTS(a) php_printf("%s",a)
#endif
#ifndef PUTC
#define PUTC(a) PUTS(a)
#endif
#ifndef PHPWRITE
#define PHPWRITE(a,n) php_write((a),(n))
#endif
#endif
#ifdef ZTS
int zlib_globals_id;
#else
static php_zlib_globals zlib_globals;
#endif
#define OS_CODE 0x03 /* FIXME */
#define CODING_GZIP 1
#define CODING_DEFLATE 2
/* True globals, no need for thread safety */
static int le_zp;
static int gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
function_entry php_zlib_functions[] = {
PHP_FE(readgzfile, NULL)
PHP_FE(gzrewind, NULL)
PHP_FE(gzclose, NULL)
PHP_FE(gzeof, NULL)
PHP_FE(gzgetc, NULL)
PHP_FE(gzgets, NULL)
PHP_FE(gzgetss, NULL)
PHP_FE(gzread, NULL)
PHP_FE(gzopen, NULL)
PHP_FE(gzpassthru, NULL)
PHP_FE(gzseek, NULL)
PHP_FE(gztell, NULL)
PHP_FE(gzwrite, NULL)
PHP_FALIAS(gzputs, gzwrite, NULL)
PHP_FE(gzfile, NULL)
PHP_FE(gzcompress, NULL)
PHP_FE(gzuncompress, NULL)
PHP_FE(gzdeflate, NULL)
PHP_FE(gzinflate, NULL)
PHP_FE(gzencode, NULL)
PHP_FE(ob_gzhandler, NULL)
{NULL, NULL, NULL}
};
PHP_INI_BEGIN()
STD_PHP_INI_BOOLEAN("zlib.output_compression", "0", PHP_INI_ALL, OnUpdateInt, output_compression, php_zlib_globals, zlib_globals)
PHP_INI_END()
zend_module_entry php_zlib_module_entry = {
"zlib",
php_zlib_functions,
PHP_MINIT(zlib),
PHP_MSHUTDOWN(zlib),
PHP_RINIT(zlib),
NULL,
PHP_MINFO(zlib),
STANDARD_MODULE_PROPERTIES
};
#ifdef COMPILE_DL_ZLIB
ZEND_GET_MODULE(php_zlib)
#endif
static void phpi_destructor_gzclose(zend_rsrc_list_entry *rsrc)
{
gzFile *zp = (gzFile *)rsrc->ptr;
(void)gzclose(zp);
}
#ifdef ZTS
static void php_zlib_init_globals(ZLIBLS_D)
{
ZLIBG(gzgetss_state) = 0;
}
#endif
PHP_MINIT_FUNCTION(zlib)
{
PLS_FETCH();
#ifdef ZTS
zlib_globals_id = ts_allocate_id(sizeof(php_zlib_globals), (ts_allocate_ctor) php_zlib_init_globals, NULL);
#else
ZLIBG(gzgetss_state)=0;
#endif
le_zp = zend_register_list_destructors_ex(phpi_destructor_gzclose, NULL, "zlib", module_number);
#if HAVE_FOPENCOOKIE
if(PG(allow_url_fopen)) {
php_register_url_wrapper("zlib",zlib_fopen_wrapper);
}
#endif
REGISTER_LONG_CONSTANT("FORCE_GZIP", CODING_GZIP, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FORCE_DEFLATE", CODING_DEFLATE, CONST_CS | CONST_PERSISTENT);
REGISTER_INI_ENTRIES();
return SUCCESS;
}
PHP_RINIT_FUNCTION(zlib)
{
ZLIBLS_FETCH();
ZLIBG(ob_gzhandler_status) = 0;
switch (ZLIBG(output_compression)) {
case 0:
break;
case 1:
php_enable_output_compression(4096);
break;
default:
php_enable_output_compression(ZLIBG(output_compression));
}
return SUCCESS;
}
PHP_MSHUTDOWN_FUNCTION(zlib)
{
#if HAVE_FOPENCOOKIE
PLS_FETCH();
if(PG(allow_url_fopen)) {
php_unregister_url_wrapper("zlib");
}
#endif
UNREGISTER_INI_ENTRIES();
return SUCCESS;
}
PHP_MINFO_FUNCTION(zlib)
{
php_info_print_table_start();
php_info_print_table_row(2, "ZLib Support", "enabled");
#if HAVE_FOPENCOOKIE
php_info_print_table_row(2, "'zlib:' fopen wrapper", "enabled");
#endif
php_info_print_table_row(2, "Compiled Version", ZLIB_VERSION );
php_info_print_table_row(2, "Linked Version", (char *)zlibVersion() );
php_info_print_table_end();
}
static gzFile php_gzopen_wrapper(char *path, char *mode, int options)
{
FILE *f;
int issock=0, socketd=0;
f = php_fopen_wrapper(path, mode, options, &issock, &socketd, NULL);
if (!f) {
return NULL;
}
return gzdopen(fileno(f), mode);
}
/* {{{ proto array gzfile(string filename [, int use_include_path])
Read und uncompress entire .gz-file into an array */
PHP_FUNCTION(gzfile)
{
pval **filename, **arg2;
gzFile zp;
char *slashed, buf[8192];
register int i=0;
int use_include_path = 0;
PLS_FETCH();
/* check args */
switch (ZEND_NUM_ARGS()) {
case 1:
if (zend_get_parameters_ex(1,&filename) == FAILURE) {
WRONG_PARAM_COUNT;
}
break;
case 2:
if (zend_get_parameters_ex(2,&filename,&arg2) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(arg2);
use_include_path = (*arg2)->value.lval?USE_PATH:0;
break;
default:
WRONG_PARAM_COUNT;
}
convert_to_string_ex(filename);
zp = php_gzopen_wrapper((*filename)->value.str.val,"r", use_include_path|ENFORCE_SAFE_MODE);
if (!zp) {
php_error(E_WARNING,"gzFile(\"%s\") - %s",(*filename)->value.str.val,strerror(errno));
RETURN_FALSE;
}
/* Initialize return array */
if (array_init(return_value) == FAILURE) {
RETURN_FALSE;
}
/* Now loop through the file and do the magic quotes thing if needed */
memset(buf,0,8191);
while(gzgets(zp, buf, 8191) != NULL) {
if (PG(magic_quotes_runtime)) {
int len;
slashed = php_addslashes(buf,0,&len,0); /* 0 = don't free source string */
add_index_stringl(return_value, i++, slashed, len, 0);
} else {
add_index_string(return_value, i++, buf, 1);
}
}
gzclose(zp);
}
/* }}} */
/* {{{ proto int gzopen(string filename, string mode [, int use_include_path])
Open a .gz-file and return a .gz-file pointer */
PHP_FUNCTION(gzopen)
{
pval **arg1, **arg2, **arg3;
gzFile *zp;
char *p;
int use_include_path = 0;
ZLIBLS_FETCH();
switch(ZEND_NUM_ARGS()) {
case 2:
if (zend_get_parameters_ex(2,&arg1,&arg2) == FAILURE) {
WRONG_PARAM_COUNT;
}
break;
case 3:
if (zend_get_parameters_ex(3,&arg1,&arg2,&arg3) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(arg3);
use_include_path = (*arg3)->value.lval?USE_PATH:0;
break;
default:
WRONG_PARAM_COUNT;
}
convert_to_string_ex(arg1);
convert_to_string_ex(arg2);
p = estrndup((*arg2)->value.str.val,(*arg2)->value.str.len);
/*
* We need a better way of returning error messages from
* php_gzopen_wrapper().
*/
zp = php_gzopen_wrapper((*arg1)->value.str.val, p, use_include_path|ENFORCE_SAFE_MODE);
if (!zp) {
php_error(E_WARNING,"gzopen(\"%s\",\"%s\") - %s",
(*arg1)->value.str.val, p, strerror(errno));
efree(p);
RETURN_FALSE;
}
ZLIBG(gzgetss_state)=0;
efree(p);
ZEND_REGISTER_RESOURCE(return_value, zp, le_zp);
}
/* }}} */
/* {{{ proto int gzclose(int zp)
Close an open .gz-file pointer */
PHP_FUNCTION(gzclose)
{
pval **arg1;
gzFile *zp;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg1) == FAILURE) {
WRONG_PARAM_COUNT;
}
ZEND_FETCH_RESOURCE(zp, gzFile *, arg1, -1, "Zlib file", le_zp);
zend_list_delete((*arg1)->value.lval);
RETURN_TRUE;
}
/* }}} */
/* {{{ proto int gzeof(int zp)
Test for end-of-file on a .gz-file pointer */
PHP_FUNCTION(gzeof)
{
pval **arg1;
gzFile *zp;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg1) == FAILURE) {
WRONG_PARAM_COUNT;
}
ZEND_FETCH_RESOURCE(zp, gzFile *, arg1, -1, "Zlib file", le_zp);
if ((gzeof(zp))) {
RETURN_TRUE;
} else {
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto string gzgets(int zp, int length)
Get a line from .gz-file pointer */
PHP_FUNCTION(gzgets)
{
pval **arg1, **arg2;
gzFile *zp;
int len;
char *buf;
PLS_FETCH();
if (ZEND_NUM_ARGS() != 2 || zend_get_parameters_ex(2, &arg1, &arg2) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(arg2);
len = (*arg2)->value.lval;
ZEND_FETCH_RESOURCE(zp, gzFile *, arg1, -1, "Zlib file", le_zp);
buf = emalloc(sizeof(char) * (len + 1));
/* needed because recv doesnt put a null at the end*/
memset(buf,0,len+1);
if (!(gzgets(zp, buf, len) != NULL)) {
efree(buf);
RETVAL_FALSE;
} else {
if (PG(magic_quotes_runtime)) {
return_value->value.str.val = php_addslashes(buf,0,&return_value->value.str.len,1);
} else {
return_value->value.str.val = buf;
return_value->value.str.len = strlen(return_value->value.str.val);
}
return_value->type = IS_STRING;
}
return;
}
/* }}} */
/* {{{ proto string gzgetc(int zp)
Get a character from .gz-file pointer */
PHP_FUNCTION(gzgetc)
{
pval **arg1;
gzFile *zp;
int c;
char *buf;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg1) == FAILURE) {
WRONG_PARAM_COUNT;
}
ZEND_FETCH_RESOURCE(zp, gzFile *, arg1, -1, "Zlib file", le_zp);
buf = emalloc(sizeof(char) * 2);
if ((c=gzgetc(zp)) == (-1)) {
efree(buf);
RETVAL_FALSE;
} else {
buf[0]=(char)c;
buf[1]='\0';
return_value->value.str.val = buf;
return_value->value.str.len = 1;
return_value->type = IS_STRING;
}
return;
}
/* }}} */
/* Strip any HTML tags while reading */
/* {{{ proto string gzgetss(int zp, int length [, string allowable_tags])
Get a line from file pointer and strip HTML tags */
PHP_FUNCTION(gzgetss)
{
pval **fd, **bytes, **allow=NULL;
gzFile *zp;
int len;
char *buf;
char *allowed_tags=NULL;
int allowed_tags_len=0;
ZLIBLS_FETCH();
switch(ZEND_NUM_ARGS()) {
case 2:
if(zend_get_parameters_ex(2, &fd, &bytes) == FAILURE) {
RETURN_FALSE;
}
break;
case 3:
if(zend_get_parameters_ex(3, &fd, &bytes, &allow) == FAILURE) {
RETURN_FALSE;
}
convert_to_string_ex(allow);
allowed_tags = (*allow)->value.str.val;
allowed_tags_len = (*allow)->value.str.len;
break;
default:
WRONG_PARAM_COUNT;
/* NOTREACHED */
break;
}
convert_to_long_ex(bytes);
len = (*bytes)->value.lval;
ZEND_FETCH_RESOURCE(zp, gzFile *, fd, -1, "Zlib file", le_zp);
buf = emalloc(sizeof(char) * (len + 1));
/*needed because recv doesnt set null char at end*/
memset(buf,0,len+1);
if (!(gzgets(zp, buf, len) != NULL)) {
efree(buf);
RETURN_FALSE;
}
/* strlen() can be used here since we are doing it on the return of an fgets() anyway */
php_strip_tags(buf, strlen(buf), ZLIBG(gzgetss_state), allowed_tags, allowed_tags_len);
RETURN_STRING(buf, 0);
}
/* }}} */
/* {{{ proto int gzwrite(int zp, string str [, int length])
Binary-safe .gz-file write */
PHP_FUNCTION(gzwrite)
{
pval **arg1, **arg2, **arg3=NULL;
gzFile *zp;
int ret;
int num_bytes;
PLS_FETCH();
switch (ZEND_NUM_ARGS()) {
case 2:
if (zend_get_parameters_ex(2, &arg1, &arg2)==FAILURE) {
RETURN_FALSE;
}
convert_to_string_ex(arg2);
num_bytes = (*arg2)->value.str.len;
break;
case 3:
if (zend_get_parameters_ex(3, &arg1, &arg2, &arg3)==FAILURE) {
RETURN_FALSE;
}
convert_to_string_ex(arg2);
convert_to_long_ex(arg3);
num_bytes = MIN((*arg3)->value.lval, (*arg2)->value.str.len);
break;
default:
WRONG_PARAM_COUNT;
/* NOTREACHED */
break;
}
ZEND_FETCH_RESOURCE(zp, gzFile *, arg1, -1, "Zlib file", le_zp);
/* strip slashes only if the length wasn't specified explicitly */
if (!arg3 && PG(magic_quotes_runtime)) {
php_stripslashes((*arg2)->value.str.val,&num_bytes);
}
ret = gzwrite(zp, (*arg2)->value.str.val,num_bytes);
RETURN_LONG(ret);
}
/* }}} */
/* {{{ proto int gzputs(int zp, string str [, int length])
An alias for gzwrite */
/* }}} */
/* {{{ proto int gzrewind(int zp)
Rewind the position of a .gz-file pointer */
PHP_FUNCTION(gzrewind)
{
pval **arg1;
gzFile *zp;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg1) == FAILURE) {
WRONG_PARAM_COUNT;
}
ZEND_FETCH_RESOURCE(zp, gzFile *, arg1, -1, "Zlib file", le_zp);
gzrewind(zp);
RETURN_TRUE;
}
/* }}} */
/* {{{ proto int gztell(int zp)
Get .gz-file pointer's read/write position */
PHP_FUNCTION(gztell)
{
pval **arg1;
long pos;
gzFile *zp;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg1) == FAILURE) {
WRONG_PARAM_COUNT;
}
ZEND_FETCH_RESOURCE(zp, gzFile *, arg1, -1, "Zlib file", le_zp);
pos = gztell(zp);
RETURN_LONG(pos);
}
/* }}} */
/* {{{ proto int gzseek(int zp, int offset)
Seek on a file pointer */
PHP_FUNCTION(gzseek)
{
pval **arg1, **arg2;
int ret;
gzFile *zp;
if (ZEND_NUM_ARGS() != 2 || zend_get_parameters_ex(2, &arg1, &arg2) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(arg2);
ZEND_FETCH_RESOURCE(zp, gzFile *, arg1, -1, "Zlib file", le_zp);
ret = gzseek(zp, (*arg2)->value.lval, SEEK_SET);
RETURN_LONG(ret);
}
/* }}} */
/*
* Read a file and write the ouput to stdout
*/
/* {{{ proto int readgzfile(string filename [, int use_include_path])
Output a .gz-file */
PHP_FUNCTION(readgzfile)
{
pval **arg1, **arg2;
char buf[8192];
gzFile *zp;
int b, size;
int use_include_path = 0;
/* check args */
switch (ZEND_NUM_ARGS()) {
case 1:
if (zend_get_parameters_ex(1,&arg1) == FAILURE) {
WRONG_PARAM_COUNT;
}
break;
case 2:
if (zend_get_parameters_ex(2,&arg1,&arg2) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(arg2);
use_include_path = (*arg2)->value.lval?USE_PATH:0;
break;
default:
WRONG_PARAM_COUNT;
}
convert_to_string_ex(arg1);
/*
* We need a better way of returning error messages from
* php_gzopen_wrapper().
*/
zp = php_gzopen_wrapper((*arg1)->value.str.val,"r", use_include_path|ENFORCE_SAFE_MODE);
if (!zp){
php_error(E_WARNING,"ReadGzFile(\"%s\") - %s",(*arg1)->value.str.val,strerror(errno));
RETURN_FALSE;
}
size= 0;
while((b = gzread(zp, buf, sizeof(buf))) > 0) {
PHPWRITE(buf,b);
size += b ;
}
gzclose(zp);
RETURN_LONG(size);
}
/* }}} */
/*
* Read to EOF on a file descriptor and write the output to stdout.
*/
/* {{{ proto int gzpassthru(int zp)
Output all remaining data from a .gz-file pointer */
PHP_FUNCTION(gzpassthru)
{
pval **arg1;
gzFile *zp;
char buf[8192];
int size, b;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg1) == FAILURE) {
WRONG_PARAM_COUNT;
}
ZEND_FETCH_RESOURCE(zp, gzFile *, arg1, -1, "Zlib file", le_zp);
size = 0;
while((b = gzread(zp, buf, sizeof(buf))) > 0) {
PHPWRITE(buf,b);
size += b ;
}
/* gzclose(zp); */
zend_list_delete((*arg1)->value.lval);
RETURN_LONG(size);
}
/* }}} */
/* {{{ proto string gzread(int zp, int length)
Binary-safe file read */
PHP_FUNCTION(gzread)
{
pval **arg1, **arg2;
gzFile *zp;
int len;
PLS_FETCH();
if (ZEND_NUM_ARGS() != 2 || zend_get_parameters_ex(2, &arg1, &arg2) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(arg2);
len = (*arg2)->value.lval;
ZEND_FETCH_RESOURCE(zp, gzFile *, arg1, -1, "Zlib file", le_zp);
return_value->value.str.val = emalloc(sizeof(char) * (len + 1));
/* needed because recv doesnt put a null at the end*/
return_value->value.str.len = gzread(zp, return_value->value.str.val, len);
return_value->value.str.val[return_value->value.str.len] = 0;
if (PG(magic_quotes_runtime)) {
return_value->value.str.val = php_addslashes(return_value->value.str.val,return_value->value.str.len,&return_value->value.str.len,1);
}
return_value->type = IS_STRING;
}
/* }}} */
/* {{{ proto string gzcompress(string data [, int level])
Gzip-compress a string */
PHP_FUNCTION(gzcompress)
{
zval **data, **zlimit = NULL;
int limit,status;
unsigned long l2;
char *s2;
switch (ZEND_NUM_ARGS()) {
case 1:
if (zend_get_parameters_ex(1, &data) == FAILURE)
WRONG_PARAM_COUNT;
limit=-1;
break;
case 2:
if (zend_get_parameters_ex(2, &data, &zlimit) == FAILURE)
WRONG_PARAM_COUNT;
convert_to_long_ex(zlimit);
limit = (*zlimit)->value.lval;
if((limit<0)||(limit>9)) {
php_error(E_WARNING,"gzcompress: compression level must be whithin 0..9");
RETURN_FALSE;
}
break;
default:
WRONG_PARAM_COUNT;
}
convert_to_string_ex(data);
l2 = (*data)->value.str.len + ((*data)->value.str.len/1000) + 15;
s2 = (char *) emalloc(l2);
if(! s2) RETURN_FALSE;
if(limit>=0) {
status = compress2(s2,&l2,(*data)->value.str.val, (*data)->value.str.len,limit);
} else {
status = compress(s2,&l2,(*data)->value.str.val, (*data)->value.str.len);
}
if(status==Z_OK) {
RETURN_STRINGL(s2, l2, 0);
} else {
efree(s2);
php_error(E_WARNING,"gzcompress: %s",zError(status));
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto string gzuncompress(string data, int length)
Unzip a gzip-compressed string */
PHP_FUNCTION(gzuncompress)
{
zval **data, **zlimit = NULL;
int status,factor=1,maxfactor=8;
unsigned long plength=0,length;
char *s1=NULL,*s2=NULL;
switch (ZEND_NUM_ARGS()) {
case 1:
if (zend_get_parameters_ex(1, &data) == FAILURE)
WRONG_PARAM_COUNT;
length=0;
break;
case 2:
if (zend_get_parameters_ex(2, &data, &zlimit) == FAILURE)
WRONG_PARAM_COUNT;
convert_to_long_ex(zlimit);
if((*zlimit)->value.lval<=0) {
php_error(E_WARNING,"gzuncompress: length must be greater zero");
RETURN_FALSE;
}
plength = (*zlimit)->value.lval;
break;
default:
WRONG_PARAM_COUNT;
}
convert_to_string_ex(data);
/*
zlib::uncompress() wants to know the output data length
if none was given as a parameter
we try from input length * 2 up to input length * 2^8
doubling it whenever it wasn't big enough
that should be eneugh for all real life cases
*/
do {
length=plength?plength:(*data)->value.str.len*(1<<factor++);
s2 = (char *) erealloc(s1,length);
if(! s2) { if(s1) efree(s1); RETURN_FALSE; }
status = uncompress(s2, &length ,(*data)->value.str.val, (*data)->value.str.len);
s1=s2;
} while((status==Z_BUF_ERROR)&&(!plength)&&(factor<maxfactor));
if(status==Z_OK) {
s2 = erealloc(s2, length);
RETURN_STRINGL(s2, length, 0);
} else {
efree(s2);
php_error(E_WARNING,"gzuncompress: %s",zError(status));
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto string gzdeflate(string data [, int level])
Gzip-compress a string */
PHP_FUNCTION(gzdeflate)
{
zval **data, **zlimit = NULL;
int level,status;
z_stream stream;
char *s2;
switch (ZEND_NUM_ARGS()) {
case 1:
if (zend_get_parameters_ex(1, &data) == FAILURE)
WRONG_PARAM_COUNT;
level=Z_DEFAULT_COMPRESSION;
break;
case 2:
if (zend_get_parameters_ex(2, &data, &zlimit) == FAILURE)
WRONG_PARAM_COUNT;
convert_to_long_ex(zlimit);
level = (*zlimit)->value.lval;
if((level<0)||(level>9)) {
php_error(E_WARNING,"gzdeflate: compression level must be whithin 0..9");
RETURN_FALSE;
}
break;
default:
WRONG_PARAM_COUNT;
}
convert_to_string_ex(data);
stream.data_type = Z_ASCII;
stream.zalloc = (alloc_func) Z_NULL;
stream.zfree = (free_func) Z_NULL;
stream.opaque = (voidpf) Z_NULL;
stream.next_in = (Bytef*) (*data)->value.str.val;
stream.avail_in = (*data)->value.str.len;
stream.avail_out = stream.avail_in + (stream.avail_in/1000) + 15;
s2 = (char *) emalloc(stream.avail_out);
if(!s2) RETURN_FALSE;
stream.next_out = s2;
/* init with -MAX_WBITS disables the zlib internal headers */
status = deflateInit2(&stream, level, Z_DEFLATED, -MAX_WBITS, MAX_MEM_LEVEL, 0);
if (status == Z_OK) {
status = deflate(&stream, Z_FINISH);
if (status != Z_STREAM_END) {
deflateEnd(&stream);
if (status == Z_OK) {
status = Z_BUF_ERROR;
}
} else {
status = deflateEnd(&stream);
}
}
if(status==Z_OK) {
RETURN_STRINGL(s2, stream.total_out, 0);
} else {
efree(s2);
php_error(E_WARNING,"gzdeflate: %s",zError(status));
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto string gzinflate(string data, int length)
Unzip a gzip-compressed string */
PHP_FUNCTION(gzinflate)
{
zval **data, **zlimit = NULL;
int status,factor=1,maxfactor=8;
unsigned long plength=0,length;
char *s1=NULL,*s2=NULL;
z_stream stream;
switch (ZEND_NUM_ARGS()) {
case 1:
if (zend_get_parameters_ex(1, &data) == FAILURE)
WRONG_PARAM_COUNT;
length=0;
break;
case 2:
if (zend_get_parameters_ex(2, &data, &zlimit) == FAILURE)
WRONG_PARAM_COUNT;
convert_to_long_ex(zlimit);
if((*zlimit)->value.lval<=0) {
php_error(E_WARNING,"gzinflate: length must be greater zero");
RETURN_FALSE;
}
plength = (*zlimit)->value.lval;
break;
default:
WRONG_PARAM_COUNT;
}
convert_to_string_ex(data);
/*
stream.avail_out wants to know the output data length
if none was given as a parameter
we try from input length * 2 up to input length * 2^8
doubling it whenever it wasn't big enough
that should be enaugh for all real life cases
*/
stream.zalloc = (alloc_func) Z_NULL;
stream.zfree = (free_func) Z_NULL;
do {
length=plength?plength:(*data)->value.str.len*(1<<factor++);
s2 = (char *) erealloc(s1,length);
if(! s2) { if(s1) efree(s1); RETURN_FALSE; }
stream.next_in = (Bytef*) (*data)->value.str.val;
stream.avail_in = (uInt) (*data)->value.str.len;
stream.next_out = s2;
stream.avail_out = (uInt) length;
/* init with -MAX_WBITS disables the zlib internal headers */
status = inflateInit2(&stream, -MAX_WBITS);
if (status == Z_OK) {
status = inflate(&stream, Z_FINISH);
if (status != Z_STREAM_END) {
inflateEnd(&stream);
if (status == Z_OK) {
status = Z_BUF_ERROR;
}
} else {
status = inflateEnd(&stream);
}
}
s1=s2;
} while((status==Z_BUF_ERROR)&&(!plength)&&(factor<maxfactor));
if(status==Z_OK) {
s2 = erealloc(s2, stream.total_out);
RETURN_STRINGL(s2, stream.total_out, 0);
} else {
efree(s2);
php_error(E_WARNING,"gzinflate: %s",zError(status));
RETURN_FALSE;
}
}
/* }}} */
static int php_do_deflate(uint str_length, Bytef **p_buffer, uint *p_buffer_len, zend_bool do_start, zend_bool do_end ZLIBLS_DC)
{
Bytef *buffer;
uInt prev_outlen, outlen;
int err;
int start_offset = (do_start?10:0);
int end_offset = (do_end?8:0);
outlen = sizeof(char) * (str_length * 1.001 + 12);
if ((outlen+start_offset+end_offset) > *p_buffer_len) {
buffer = (Bytef *) emalloc(outlen+start_offset+end_offset);
} else {
buffer = *p_buffer;
}
ZLIBG(stream).next_out = buffer+start_offset;
ZLIBG(stream).avail_out = outlen;
err = deflate(&ZLIBG(stream), Z_SYNC_FLUSH);
while (err == Z_OK && !ZLIBG(stream).avail_out) {
prev_outlen = outlen;
outlen *= 3;
if ((outlen+start_offset+end_offset) > *p_buffer_len) {
buffer = realloc(buffer, outlen+start_offset+end_offset);
}
ZLIBG(stream).next_out = buffer+start_offset + prev_outlen;
ZLIBG(stream).avail_out = prev_outlen * 2;
err = deflate(&ZLIBG(stream), Z_SYNC_FLUSH);
}
if (do_end) {
err = deflate(&ZLIBG(stream), Z_FINISH);
}
*p_buffer = buffer;