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LCOV - code coverage report
Current view: top level - ext/bz2 - bz2.c (source / functions) Hit Total Coverage
Test: PHP Code Coverage Lines: 179 198 90.4 %
Date: 2014-09-19 Functions: 17 17 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :   +----------------------------------------------------------------------+
       3             :   | PHP Version 5                                                        |
       4             :   +----------------------------------------------------------------------+
       5             :   | Copyright (c) 1997-2014 The PHP Group                                |
       6             :   +----------------------------------------------------------------------+
       7             :   | This source file is subject to version 3.01 of the PHP license,      |
       8             :   | that is bundled with this package in the file LICENSE, and is        |
       9             :   | available through the world-wide-web at the following url:           |
      10             :   | http://www.php.net/license/3_01.txt                                  |
      11             :   | If you did not receive a copy of the PHP license and are unable to   |
      12             :   | obtain it through the world-wide-web, please send a note to          |
      13             :   | license@php.net so we can mail you a copy immediately.               |
      14             :   +----------------------------------------------------------------------+
      15             :   | Author: Sterling Hughes <sterling@php.net>                           |
      16             :   +----------------------------------------------------------------------+
      17             : */
      18             :  
      19             : /* $Id$ */
      20             : 
      21             : #ifdef HAVE_CONFIG_H
      22             : #include "config.h"
      23             : #endif
      24             : 
      25             : #include "php.h"
      26             : #include "php_bz2.h"
      27             : 
      28             : #if HAVE_BZ2
      29             : 
      30             : /* PHP Includes */
      31             : #include "ext/standard/file.h"
      32             : #include "ext/standard/info.h"
      33             : #include "ext/standard/php_string.h"
      34             : #include "main/php_network.h"
      35             : 
      36             : /* for fileno() */
      37             : #include <stdio.h>
      38             : 
      39             : /* Internal error constants */
      40             : #define PHP_BZ_ERRNO   0
      41             : #define PHP_BZ_ERRSTR  1
      42             : #define PHP_BZ_ERRBOTH 2
      43             : 
      44             : static PHP_MINIT_FUNCTION(bz2);
      45             : static PHP_MSHUTDOWN_FUNCTION(bz2);
      46             : static PHP_MINFO_FUNCTION(bz2);
      47             : static PHP_FUNCTION(bzopen);
      48             : static PHP_FUNCTION(bzread);
      49             : static PHP_FUNCTION(bzerrno);
      50             : static PHP_FUNCTION(bzerrstr);
      51             : static PHP_FUNCTION(bzerror);
      52             : static PHP_FUNCTION(bzcompress);
      53             : static PHP_FUNCTION(bzdecompress);
      54             : 
      55             : /* {{{ arginfo */
      56             : ZEND_BEGIN_ARG_INFO_EX(arginfo_bzread, 0, 0, 1)
      57             :         ZEND_ARG_INFO(0, bz)
      58             :         ZEND_ARG_INFO(0, length)
      59             : ZEND_END_ARG_INFO()
      60             : 
      61             : ZEND_BEGIN_ARG_INFO(arginfo_bzopen, 0)
      62             :         ZEND_ARG_INFO(0, file)
      63             :         ZEND_ARG_INFO(0, mode)
      64             : ZEND_END_ARG_INFO()
      65             : 
      66             : ZEND_BEGIN_ARG_INFO(arginfo_bzerrno, 0)
      67             :         ZEND_ARG_INFO(0, bz)
      68             : ZEND_END_ARG_INFO()
      69             : 
      70             : ZEND_BEGIN_ARG_INFO(arginfo_bzerrstr, 0)
      71             :         ZEND_ARG_INFO(0, bz)
      72             : ZEND_END_ARG_INFO()
      73             : 
      74             : ZEND_BEGIN_ARG_INFO(arginfo_bzerror, 0)
      75             :         ZEND_ARG_INFO(0, bz)
      76             : ZEND_END_ARG_INFO()
      77             : 
      78             : ZEND_BEGIN_ARG_INFO_EX(arginfo_bzcompress, 0, 0, 2)
      79             :         ZEND_ARG_INFO(0, source)
      80             :         ZEND_ARG_INFO(0, blocksize)
      81             :         ZEND_ARG_INFO(0, workfactor)
      82             : ZEND_END_ARG_INFO()
      83             : 
      84             : ZEND_BEGIN_ARG_INFO_EX(arginfo_bzdecompress, 0, 0, 1)
      85             :         ZEND_ARG_INFO(0, source)
      86             :         ZEND_ARG_INFO(0, small)
      87             : ZEND_END_ARG_INFO()
      88             : 
      89             : ZEND_BEGIN_ARG_INFO_EX(arginfo_bzwrite, 0, 0, 2)
      90             :         ZEND_ARG_INFO(0, fp)
      91             :         ZEND_ARG_INFO(0, str)
      92             :         ZEND_ARG_INFO(0, length)
      93             : ZEND_END_ARG_INFO()
      94             : 
      95             : ZEND_BEGIN_ARG_INFO(arginfo_bzflush, 0)
      96             :         ZEND_ARG_INFO(0, fp)
      97             : ZEND_END_ARG_INFO()
      98             : /* }}} */
      99             : 
     100             : static const zend_function_entry bz2_functions[] = {
     101             :         PHP_FE(bzopen,       arginfo_bzopen)
     102             :         PHP_FE(bzread,       arginfo_bzread)
     103             :         PHP_FALIAS(bzwrite,   fwrite,           arginfo_bzwrite)
     104             :         PHP_FALIAS(bzflush,   fflush,           arginfo_bzflush)
     105             :         PHP_FALIAS(bzclose,   fclose,           arginfo_bzflush)
     106             :         PHP_FE(bzerrno,      arginfo_bzerrno)
     107             :         PHP_FE(bzerrstr,     arginfo_bzerrstr)
     108             :         PHP_FE(bzerror,      arginfo_bzerror)
     109             :         PHP_FE(bzcompress,   arginfo_bzcompress)
     110             :         PHP_FE(bzdecompress, arginfo_bzdecompress)
     111             :         PHP_FE_END
     112             : };
     113             : 
     114             : zend_module_entry bz2_module_entry = {
     115             :         STANDARD_MODULE_HEADER,
     116             :         "bz2",
     117             :         bz2_functions,
     118             :         PHP_MINIT(bz2),
     119             :         PHP_MSHUTDOWN(bz2),
     120             :         NULL,
     121             :         NULL,
     122             :         PHP_MINFO(bz2),
     123             :         NO_VERSION_YET,
     124             :         STANDARD_MODULE_PROPERTIES
     125             : };
     126             : 
     127             : #ifdef COMPILE_DL_BZ2
     128             : ZEND_GET_MODULE(bz2)
     129             : #endif
     130             : 
     131             : struct php_bz2_stream_data_t {
     132             :         BZFILE *bz_file;
     133             :         php_stream *stream;
     134             : };
     135             : 
     136             : /* {{{ BZip2 stream implementation */
     137             : 
     138          10 : static size_t php_bz2iop_read(php_stream *stream, char *buf, size_t count TSRMLS_DC)
     139             : {
     140          10 :         struct php_bz2_stream_data_t *self = (struct php_bz2_stream_data_t *)stream->abstract;
     141             :         size_t ret;
     142             :         
     143          10 :         ret = BZ2_bzread(self->bz_file, buf, count);
     144             : 
     145          10 :         if (ret == 0) {
     146           3 :                 stream->eof = 1;
     147             :         }
     148             : 
     149          10 :         return ret;
     150             : }
     151             : 
     152          15 : static size_t php_bz2iop_write(php_stream *stream, const char *buf, size_t count TSRMLS_DC)
     153             : {
     154          15 :         struct php_bz2_stream_data_t *self = (struct php_bz2_stream_data_t *)stream->abstract;
     155             : 
     156          15 :         return BZ2_bzwrite(self->bz_file, (char*)buf, count); 
     157             : }
     158             : 
     159          16 : static int php_bz2iop_close(php_stream *stream, int close_handle TSRMLS_DC)
     160             : {
     161          16 :         struct php_bz2_stream_data_t *self = (struct php_bz2_stream_data_t *)stream->abstract;
     162          16 :         int ret = EOF;
     163             :         
     164          16 :         if (close_handle) {
     165          16 :                 BZ2_bzclose(self->bz_file);
     166             :         }
     167             : 
     168          16 :         if (self->stream) {
     169           7 :                 php_stream_free(self->stream, PHP_STREAM_FREE_CLOSE | (close_handle == 0 ? PHP_STREAM_FREE_PRESERVE_HANDLE : 0));
     170             :         }
     171             : 
     172          16 :         efree(self);
     173             : 
     174          16 :         return ret;
     175             : }
     176             : 
     177          16 : static int php_bz2iop_flush(php_stream *stream TSRMLS_DC)
     178             : {
     179          16 :         struct php_bz2_stream_data_t *self = (struct php_bz2_stream_data_t *)stream->abstract;
     180          16 :         return BZ2_bzflush(self->bz_file);
     181             : }
     182             : /* }}} */
     183             : 
     184             : php_stream_ops php_stream_bz2io_ops = {
     185             :         php_bz2iop_write, php_bz2iop_read,
     186             :         php_bz2iop_close, php_bz2iop_flush,
     187             :         "BZip2",
     188             :         NULL, /* seek */
     189             :         NULL, /* cast */
     190             :         NULL, /* stat */
     191             :         NULL  /* set_option */
     192             : };
     193             : 
     194             : /* {{{ Bzip2 stream openers */
     195          16 : PHP_BZ2_API php_stream *_php_stream_bz2open_from_BZFILE(BZFILE *bz, 
     196             :                                                                                                                 const char *mode, php_stream *innerstream STREAMS_DC TSRMLS_DC)
     197             : {
     198             :         struct php_bz2_stream_data_t *self;
     199             :         
     200          16 :         self = emalloc(sizeof(*self));
     201             : 
     202          16 :         self->stream = innerstream;
     203          16 :         self->bz_file = bz;
     204             : 
     205          16 :         return php_stream_alloc_rel(&php_stream_bz2io_ops, self, 0, mode);
     206             : }
     207             : 
     208          10 : PHP_BZ2_API php_stream *_php_stream_bz2open(php_stream_wrapper *wrapper,
     209             :                                                                                         const char *path,
     210             :                                                                                         const char *mode,
     211             :                                                                                         int options,
     212             :                                                                                         char **opened_path,
     213             :                                                                                         php_stream_context *context STREAMS_DC TSRMLS_DC)
     214             : {
     215          10 :         php_stream *retstream = NULL, *stream = NULL;
     216          10 :         char *path_copy = NULL;
     217          10 :         BZFILE *bz_file = NULL;
     218             : 
     219          10 :         if (strncasecmp("compress.bzip2://", path, 17) == 0) {
     220           0 :                 path += 17;
     221             :         }
     222          10 :         if (mode[0] == '\0' || (mode[0] != 'w' && mode[0] != 'r' && mode[1] != '\0')) {
     223           0 :                 return NULL;
     224             :         }
     225             : 
     226             : #ifdef VIRTUAL_DIR
     227             :         virtual_filepath_ex(path, &path_copy, NULL TSRMLS_CC);
     228             : #else
     229          10 :         path_copy = path;
     230             : #endif
     231             : 
     232          10 :         if (php_check_open_basedir(path_copy TSRMLS_CC)) {
     233             : #ifdef VIRTUAL_DIR
     234             :                 efree(path_copy);
     235             : #endif
     236           0 :                 return NULL;
     237             :         }
     238             :         
     239             :         /* try and open it directly first */
     240          10 :         bz_file = BZ2_bzopen(path_copy, mode);
     241             : 
     242          10 :         if (opened_path && bz_file) {
     243             : #ifdef VIRTUAL_DIR
     244             :                 *opened_path = path_copy;
     245             :                 path_copy = NULL;
     246             : #else
     247           0 :                 *opened_path = estrdup(path_copy);
     248             : #endif
     249             :         }
     250             : 
     251             : #ifdef VIRTUAL_DIR
     252             :         if (path_copy) {
     253             :                 efree(path_copy);
     254             :         }
     255             : #endif
     256          10 :         path_copy = NULL;
     257             :         
     258          10 :         if (bz_file == NULL) {
     259             :                 /* that didn't work, so try and get something from the network/wrapper */
     260           1 :                 stream = php_stream_open_wrapper(path, mode, options | STREAM_WILL_CAST, opened_path);
     261             :         
     262           1 :                 if (stream) {
     263             :                         php_socket_t fd;
     264           0 :                         if (SUCCESS == php_stream_cast(stream, PHP_STREAM_AS_FD, (void **) &fd, REPORT_ERRORS)) {
     265           0 :                                 bz_file = BZ2_bzdopen(fd, mode);
     266             :                         }
     267             :                 }
     268             : 
     269             :                 /* remove the file created by php_stream_open_wrapper(), it is not needed since BZ2 functions
     270             :                  * failed.
     271             :                  */
     272           1 :                 if (opened_path && !bz_file && mode[0] == 'w') {
     273           0 :                         VCWD_UNLINK(*opened_path);
     274             :                 }
     275             :         }
     276             :         
     277          10 :         if (bz_file) {
     278           9 :                 retstream = _php_stream_bz2open_from_BZFILE(bz_file, mode, stream STREAMS_REL_CC TSRMLS_CC);
     279           9 :                 if (retstream) {
     280           9 :                         return retstream;
     281             :                 }
     282             : 
     283           0 :                 BZ2_bzclose(bz_file);
     284             :         }
     285             : 
     286           1 :         if (stream) {
     287           0 :                 php_stream_close(stream);
     288             :         }
     289             : 
     290           1 :         return NULL;
     291             : }
     292             : 
     293             : /* }}} */
     294             : 
     295             : static php_stream_wrapper_ops bzip2_stream_wops = {
     296             :         _php_stream_bz2open,
     297             :         NULL, /* close */
     298             :         NULL, /* fstat */
     299             :         NULL, /* stat */
     300             :         NULL, /* opendir */
     301             :         "BZip2",
     302             :         NULL, /* unlink */
     303             :         NULL, /* rename */
     304             :         NULL, /* mkdir */
     305             :         NULL  /* rmdir */
     306             : };
     307             : 
     308             : static php_stream_wrapper php_stream_bzip2_wrapper = {
     309             :         &bzip2_stream_wops,
     310             :         NULL,
     311             :         0 /* is_url */
     312             : };
     313             : 
     314             : static void php_bz2_error(INTERNAL_FUNCTION_PARAMETERS, int);
     315             : 
     316       20335 : static PHP_MINIT_FUNCTION(bz2)
     317             : {
     318       20335 :         php_register_url_stream_wrapper("compress.bzip2", &php_stream_bzip2_wrapper TSRMLS_CC);
     319       20335 :         php_stream_filter_register_factory("bzip2.*", &php_bz2_filter_factory TSRMLS_CC);
     320       20335 :         return SUCCESS;
     321             : }
     322             : 
     323       20369 : static PHP_MSHUTDOWN_FUNCTION(bz2)
     324             : {
     325       20369 :         php_unregister_url_stream_wrapper("compress.bzip2" TSRMLS_CC);
     326       20369 :         php_stream_filter_unregister_factory("bzip2.*" TSRMLS_CC);
     327             : 
     328       20369 :         return SUCCESS;
     329             : }
     330             : 
     331         143 : static PHP_MINFO_FUNCTION(bz2)
     332             : {
     333         143 :         php_info_print_table_start();
     334         143 :         php_info_print_table_row(2, "BZip2 Support", "Enabled");
     335         143 :         php_info_print_table_row(2, "Stream Wrapper support", "compress.bzip2://");
     336         143 :         php_info_print_table_row(2, "Stream Filter support", "bzip2.decompress, bzip2.compress");
     337         143 :         php_info_print_table_row(2, "BZip2 Version", (char *) BZ2_bzlibVersion());
     338         143 :         php_info_print_table_end();
     339         143 : }
     340             : 
     341             : /* {{{ proto string bzread(resource bz[, int length])
     342             :    Reads up to length bytes from a BZip2 stream, or 1024 bytes if length is not specified */
     343          16 : static PHP_FUNCTION(bzread)
     344             : {
     345             :         zval *bz;
     346          16 :         zend_long len = 1024;
     347             :         php_stream *stream;
     348             :         zend_string *data;
     349             : 
     350          16 :         if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r|l", &bz, &len)) {
     351           2 :                 RETURN_FALSE;
     352             :         }
     353             : 
     354          14 :         php_stream_from_zval(stream, bz);
     355             : 
     356          13 :         if ((len + 1) < 1) {
     357           1 :                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "length may not be negative");
     358           1 :                 RETURN_FALSE;
     359             :         }
     360          24 :         data = zend_string_alloc(len, 0);
     361          12 :         data->len = php_stream_read(stream, data->val, data->len);
     362             : 
     363          12 :         if (data->len < 0) {
     364             :                 zend_string_free(data);
     365             :                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "could not read valid bz2 data from stream");
     366             :                 RETURN_FALSE;
     367             :         }
     368          12 :         data->val[data->len] = '\0';
     369             : 
     370          12 :         RETURN_STR(data);
     371             : }
     372             : /* }}} */
     373             : 
     374             : /* {{{ proto resource bzopen(string|int file|fp, string mode)
     375             :    Opens a new BZip2 stream */
     376          37 : static PHP_FUNCTION(bzopen)
     377             : {
     378             :         zval     *file;   /* The file to open */
     379             :         char     *mode;   /* The mode to open the stream with */
     380             :         size_t      mode_len;
     381             : 
     382             :         BZFILE   *bz;     /* The compressed file stream */
     383          37 :         php_stream *stream = NULL;
     384             :         
     385          37 :         if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zs", &file, &mode, &mode_len) == FAILURE) {
     386           1 :                 return;
     387             :         }
     388             : 
     389          36 :         if (mode_len != 1 || (mode[0] != 'r' && mode[0] != 'w')) {
     390           3 :                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "'%s' is not a valid mode for bzopen(). Only 'w' and 'r' are supported.", mode);
     391           3 :                 RETURN_FALSE;
     392             :         }
     393             : 
     394             :         /* If it's not a resource its a string containing the filename to open */
     395          33 :         if (Z_TYPE_P(file) == IS_STRING) {
     396          12 :                 if (Z_STRLEN_P(file) == 0) {
     397           2 :                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "filename cannot be empty");
     398           2 :                         RETURN_FALSE;
     399             :                 }
     400             :                 
     401          10 :                 if (CHECK_ZVAL_NULL_PATH(file)) {
     402           0 :                         RETURN_FALSE;
     403             :                 }
     404             : 
     405          10 :                 stream = php_stream_bz2open(NULL, Z_STRVAL_P(file), mode, REPORT_ERRORS, NULL);
     406          21 :         } else if (Z_TYPE_P(file) == IS_RESOURCE) {
     407             :                 /* If it is a resource, than its a stream resource */
     408             :                 php_socket_t fd;
     409             :                 size_t stream_mode_len;
     410             : 
     411          19 :                 php_stream_from_zval(stream, file);
     412          19 :                 stream_mode_len = strlen(stream->mode);
     413             :                 
     414          19 :                 if (stream_mode_len != 1 && !(stream_mode_len == 2 && memchr(stream->mode, 'b', 2))) {
     415           8 :                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "cannot use stream opened in mode '%s'", stream->mode);
     416           8 :                         RETURN_FALSE;
     417          11 :                 } else if (stream_mode_len == 1 && stream->mode[0] != 'r' && stream->mode[0] != 'w' && stream->mode[0] != 'a' && stream->mode[0] != 'x') {
     418           0 :                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "cannot use stream opened in mode '%s'", stream->mode);
     419           0 :                         RETURN_FALSE;
     420             :                 }
     421             : 
     422          11 :                 switch(mode[0]) {
     423             :                         case 'r':
     424             :                                 /* only "r" and "rb" are supported */
     425           6 :                                 if (stream->mode[0] != mode[0] && !(stream_mode_len == 2 && stream->mode[1] != mode[0])) {
     426           3 :                                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "cannot read from a stream opened in write only mode");
     427           3 :                                         RETURN_FALSE;
     428             :                                 }
     429           3 :                                 break;
     430             :                         case 'w':
     431             :                                 /* support only "w"(b), "a"(b), "x"(b) */
     432          10 :                                 if (stream->mode[0] != mode[0] && !(stream_mode_len == 2 && stream->mode[1] != mode[0])
     433           3 :                                         && stream->mode[0] != 'a' && !(stream_mode_len == 2 && stream->mode[1] != 'a')
     434           2 :                                         && stream->mode[0] != 'x' && !(stream_mode_len == 2 && stream->mode[1] != 'x')) {
     435           1 :                                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "cannot write to a stream opened in read only mode");
     436           1 :                                         RETURN_FALSE;
     437             :                                 }
     438             :                                 break;
     439             :                         default:
     440             :                                 /* not reachable */
     441             :                                 break;
     442             :                 }
     443             : 
     444           7 :                 if (FAILURE == php_stream_cast(stream, PHP_STREAM_AS_FD, (void *) &fd, REPORT_ERRORS)) {
     445           0 :                         RETURN_FALSE;
     446             :                 }
     447             :                 
     448           7 :                 bz = BZ2_bzdopen(fd, mode);
     449             : 
     450           7 :                 stream = php_stream_bz2open_from_BZFILE(bz, mode, stream);
     451             :         } else {
     452           2 :                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "first parameter has to be string or file-resource");
     453           2 :                 RETURN_FALSE;
     454             :         }
     455             : 
     456          17 :         if (stream) {
     457          16 :                 php_stream_to_zval(stream, return_value);
     458             :         } else {
     459           1 :                 RETURN_FALSE;
     460             :         }
     461             : }
     462             : /* }}} */
     463             : 
     464             : /* {{{ proto int bzerrno(resource bz)
     465             :    Returns the error number */
     466           7 : static PHP_FUNCTION(bzerrno)
     467             : {
     468           7 :         php_bz2_error(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_BZ_ERRNO);
     469           7 : }
     470             : /* }}} */
     471             : 
     472             : /* {{{ proto string bzerrstr(resource bz)
     473             :    Returns the error string */
     474           7 : static PHP_FUNCTION(bzerrstr)
     475             : {
     476           7 :         php_bz2_error(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_BZ_ERRSTR);
     477           7 : }
     478             : /* }}} */
     479             : 
     480             : /* {{{ proto array bzerror(resource bz)
     481             :    Returns the error number and error string in an associative array */
     482           7 : static PHP_FUNCTION(bzerror)
     483             : {
     484           7 :         php_bz2_error(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_BZ_ERRBOTH);
     485           7 : }
     486             : /* }}} */
     487             : 
     488             : /* {{{ proto string bzcompress(string source [, int blocksize100k [, int workfactor]])
     489             :    Compresses a string into BZip2 encoded data */
     490           9 : static PHP_FUNCTION(bzcompress)
     491             : {
     492             :         char             *source;          /* Source data to compress */
     493           9 :         zend_long              zblock_size = 0; /* Optional block size to use */
     494           9 :         zend_long              zwork_factor = 0;/* Optional work factor to use */
     495           9 :         zend_string      *dest = NULL;     /* Destination to place the compressed data into */
     496             :         int               error,           /* Error Container */
     497           9 :                                           block_size  = 4, /* Block size for compression algorithm */
     498           9 :                                           work_factor = 0, /* Work factor for compression algorithm */
     499             :                                           argc;            /* Argument count */
     500             :         size_t               source_len;      /* Length of the source data */
     501             :         unsigned int      dest_len;        /* Length of the destination buffer */ 
     502             : 
     503           9 :         argc = ZEND_NUM_ARGS();
     504             : 
     505           9 :         if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|ll", &source, &source_len, &zblock_size, &zwork_factor) == FAILURE) {
     506           1 :                 return;
     507             :         }
     508             : 
     509             :         /* Assign them to easy to use variables, dest_len is initially the length of the data
     510             :            + .01 x length of data + 600 which is the largest size the results of the compression 
     511             :            could possibly be, at least that's what the libbz2 docs say (thanks to jeremy@nirvani.net 
     512             :            for pointing this out).  */
     513           8 :         dest_len = (unsigned int) (source_len + (0.01 * source_len) + 600);
     514             :         
     515             :         /* Allocate the destination buffer */
     516          16 :         dest = zend_string_alloc(dest_len, 0);
     517             :         
     518             :         /* Handle the optional arguments */
     519           8 :         if (argc > 1) {
     520           6 :                 block_size = zblock_size;
     521             :         }
     522             :         
     523           8 :         if (argc > 2) {
     524           5 :                 work_factor = zwork_factor;
     525             :         }
     526             : 
     527           8 :         error = BZ2_bzBuffToBuffCompress(dest->val, &dest_len, source, source_len, block_size, 0, work_factor);
     528           8 :         if (error != BZ_OK) {
     529             :                 zend_string_free(dest);
     530           4 :                 RETURN_LONG(error);
     531             :         } else {
     532             :                 /* Copy the buffer, we have perhaps allocate a lot more than we need,
     533             :                    so we erealloc() the buffer to the proper size */
     534           4 :                 dest->len = dest_len;
     535           4 :                 dest->val[dest->len] = '\0';
     536           4 :                 RETURN_STR(dest);
     537             :         }
     538             : }
     539             : /* }}} */
     540             : 
     541             : /* {{{ proto string bzdecompress(string source [, int small])
     542             :    Decompresses BZip2 compressed data */
     543          11 : static PHP_FUNCTION(bzdecompress)
     544             : {
     545             :         char *source, *dest;
     546             :         size_t source_len;
     547             :         int error;
     548          11 :         zend_long small = 0;
     549             : #if defined(PHP_WIN32)
     550             :         unsigned __int64 size = 0;
     551             : #else
     552          11 :         unsigned long long size = 0;
     553             : #endif
     554             :         bz_stream bzs;
     555             : 
     556          11 :         if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &source, &source_len, &small)) {
     557           2 :                 RETURN_FALSE;
     558             :         }
     559             : 
     560           9 :         bzs.bzalloc = NULL;
     561           9 :         bzs.bzfree = NULL;
     562             : 
     563           9 :         if (BZ2_bzDecompressInit(&bzs, 0, small) != BZ_OK) {
     564           2 :                 RETURN_FALSE;
     565             :         }
     566             : 
     567           7 :         bzs.next_in = source;
     568           7 :         bzs.avail_in = source_len;
     569             : 
     570             :         /* in most cases bz2 offers at least 2:1 compression, so we use that as our base */
     571           7 :         bzs.avail_out = source_len * 2;
     572           7 :         bzs.next_out = dest = emalloc(bzs.avail_out + 1);
     573             :         
     574          14 :         while ((error = BZ2_bzDecompress(&bzs)) == BZ_OK && bzs.avail_in > 0) {
     575             :                 /* compression is better then 2:1, need to allocate more memory */
     576           0 :                 bzs.avail_out = source_len;
     577           0 :                 size = (bzs.total_out_hi32 * (unsigned int) -1) + bzs.total_out_lo32;
     578           0 :                 dest = safe_erealloc(dest, 1, bzs.avail_out+1, (size_t) size );
     579           0 :                 bzs.next_out = dest + size;
     580             :         }
     581             : 
     582          11 :         if (error == BZ_STREAM_END || error == BZ_OK) {
     583           4 :                 size = (bzs.total_out_hi32 * (unsigned int) -1) + bzs.total_out_lo32;
     584           4 :                 dest = safe_erealloc(dest, 1, (size_t) size, 1);
     585           4 :                 dest[size] = '\0';
     586           8 :                 RETVAL_STRINGL(dest, (int) size);
     587           4 :                 efree(dest);
     588             :         } else { /* real error */
     589           3 :                 efree(dest);
     590           3 :                 RETVAL_LONG(error);
     591             :         }
     592             : 
     593           7 :         BZ2_bzDecompressEnd(&bzs);
     594             : }
     595             : /* }}} */
     596             : 
     597             : /* {{{ php_bz2_error()
     598             :    The central error handling interface, does the work for bzerrno, bzerrstr and bzerror */
     599          21 : static void php_bz2_error(INTERNAL_FUNCTION_PARAMETERS, int opt)
     600             : { 
     601             :         zval         *bzp;     /* BZip2 Resource Pointer */
     602             :         php_stream   *stream;
     603             :         const char   *errstr;  /* Error string */
     604             :         int           errnum;  /* Error number */
     605             :         struct php_bz2_stream_data_t *self;
     606             :         
     607          21 :         if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r", &bzp) == FAILURE) {
     608           0 :                 return;
     609             :         }
     610             : 
     611          21 :         php_stream_from_zval(stream, bzp);
     612             : 
     613          18 :         if (!php_stream_is(stream, PHP_STREAM_IS_BZIP2)) {
     614           0 :                 RETURN_FALSE;
     615             :         }
     616             : 
     617          18 :         self = (struct php_bz2_stream_data_t *) stream->abstract;
     618             :         
     619             :         /* Fetch the error information */
     620          18 :         errstr = BZ2_bzerror(self->bz_file, &errnum);
     621             :         
     622             :         /* Determine what to return */
     623          18 :         switch (opt) {
     624             :                 case PHP_BZ_ERRNO:
     625           6 :                         RETURN_LONG(errnum);
     626             :                         break;
     627             :                 case PHP_BZ_ERRSTR:
     628          12 :                         RETURN_STRING((char*)errstr);
     629             :                         break;
     630             :                 case PHP_BZ_ERRBOTH:
     631           6 :                         array_init(return_value);
     632             :                 
     633           6 :                         add_assoc_long  (return_value, "errno",  errnum);
     634           6 :                         add_assoc_string(return_value, "errstr", (char*)errstr);
     635             :                         break;
     636             :         }
     637             : }
     638             : /* }}} */
     639             : 
     640             : #endif
     641             : 
     642             : /*
     643             :  * Local variables:
     644             :  * tab-width: 4
     645             :  * c-basic-offset: 4
     646             :  * End:
     647             :  * vim600: fdm=marker
     648             :  * vim: noet sw=4 ts=4
     649             :  */

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