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LCOV - code coverage report
Current view: top level - ext/zlib - zlib_filter.c (source / functions) Hit Total Coverage
Test: PHP Code Coverage Lines: 165 201 82.1 %
Date: 2014-09-19 Functions: 7 7 100.0 %
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             :    | Authors: Sara Golemon (pollita@php.net)                              |
      16             :    +----------------------------------------------------------------------+
      17             : */
      18             : 
      19             : /* $Id$ */
      20             : 
      21             : #include "php.h"
      22             : #include "php_zlib.h"
      23             : 
      24             : /* {{{ data structure */
      25             : 
      26             : /* Passed as opaque in malloc callbacks */
      27             : typedef struct _php_zlib_filter_data {
      28             :         z_stream strm;
      29             :         char *inbuf;
      30             :         size_t inbuf_len;
      31             :         char *outbuf;
      32             :         size_t outbuf_len;
      33             :         int persistent;
      34             :         zend_bool finished;
      35             : } php_zlib_filter_data;
      36             : 
      37             : /* }}} */
      38             : 
      39             : /* {{{ Memory management wrappers */
      40             : 
      41         302 : static voidpf php_zlib_alloc(voidpf opaque, uInt items, uInt size)
      42             : {
      43         302 :         return (voidpf)safe_pemalloc(items, size, 0, ((php_zlib_filter_data*)opaque)->persistent);
      44             : }
      45             : 
      46         302 : static void php_zlib_free(voidpf opaque, voidpf address)
      47             : {
      48         302 :         pefree((void*)address, ((php_zlib_filter_data*)opaque)->persistent);
      49         302 : }
      50             : /* }}} */
      51             : 
      52             : /* {{{ zlib.inflate filter implementation */
      53             : 
      54         139 : static php_stream_filter_status_t php_zlib_inflate_filter(
      55             :         php_stream *stream,
      56             :         php_stream_filter *thisfilter,
      57             :         php_stream_bucket_brigade *buckets_in,
      58             :         php_stream_bucket_brigade *buckets_out,
      59             :         size_t *bytes_consumed,
      60             :         int flags
      61             :         TSRMLS_DC)
      62             : {
      63             :         php_zlib_filter_data *data;
      64             :         php_stream_bucket *bucket;
      65         139 :         size_t consumed = 0;
      66             :         int status;
      67         139 :         php_stream_filter_status_t exit_status = PSFS_FEED_ME;
      68             : 
      69         139 :         if (!thisfilter || !Z_PTR(thisfilter->abstract)) {
      70             :                 /* Should never happen */
      71           0 :                 return PSFS_ERR_FATAL;
      72             :         }
      73             : 
      74         139 :         data = (php_zlib_filter_data *)(Z_PTR(thisfilter->abstract));
      75             : 
      76         331 :         while (buckets_in->head) {
      77          59 :                 size_t bin = 0, desired;
      78             : 
      79          59 :                 bucket = buckets_in->head;
      80             : 
      81          59 :                 bucket = php_stream_bucket_make_writeable(buckets_in->head TSRMLS_CC);
      82             : 
      83         958 :                 while (bin < (unsigned int) bucket->buflen) {
      84             : 
      85         852 :                         if (data->finished) {
      86           6 :                                 consumed += bucket->buflen;
      87           6 :                                 break;
      88             :                         }
      89             : 
      90         846 :                         desired = bucket->buflen - bin;
      91         846 :                         if (desired > data->inbuf_len) {
      92           0 :                                 desired = data->inbuf_len;
      93             :                         }
      94         846 :                         memcpy(data->strm.next_in, bucket->buf + bin, desired);
      95         846 :                         data->strm.avail_in = desired;
      96             : 
      97         846 :                         status = inflate(&(data->strm), flags & PSFS_FLAG_FLUSH_CLOSE ? Z_FINISH : Z_SYNC_FLUSH);
      98         846 :                         if (status == Z_STREAM_END) {
      99          53 :                                 inflateEnd(&(data->strm));
     100          53 :                                 data->finished = '\1';
     101         793 :                         } else if (status != Z_OK) {
     102             :                                 /* Something bad happened */
     103           5 :                                 php_stream_bucket_delref(bucket TSRMLS_CC);
     104             :                                 /* reset these because despite the error the filter may be used again */
     105           5 :                                 data->strm.next_in = data->inbuf;
     106           5 :                                 data->strm.avail_in = 0;
     107           5 :                                 return PSFS_ERR_FATAL;
     108             :                         }
     109         841 :                         desired -= data->strm.avail_in; /* desired becomes what we consumed this round through */
     110         841 :                         data->strm.next_in = data->inbuf;
     111         841 :                         data->strm.avail_in = 0;
     112         841 :                         bin += desired;
     113             : 
     114         841 :                         if (data->strm.avail_out < data->outbuf_len) {
     115             :                                 php_stream_bucket *out_bucket;
     116         839 :                                 size_t bucketlen = data->outbuf_len - data->strm.avail_out;
     117         839 :                                 out_bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0 TSRMLS_CC);
     118         839 :                                 php_stream_bucket_append(buckets_out, out_bucket TSRMLS_CC);
     119         839 :                                 data->strm.avail_out = data->outbuf_len;
     120         839 :                                 data->strm.next_out = data->outbuf;
     121         839 :                                 exit_status = PSFS_PASS_ON;
     122           2 :                         } else if (status == Z_STREAM_END && data->strm.avail_out >= data->outbuf_len) {
     123             :                                 /* no more data to decompress, and nothing was spat out */
     124           1 :                                 php_stream_bucket_delref(bucket TSRMLS_CC);
     125           1 :                                 return PSFS_PASS_ON;
     126             :                         }
     127             : 
     128             :                 }
     129          53 :                 consumed += bucket->buflen;
     130          53 :                 php_stream_bucket_delref(bucket TSRMLS_CC);
     131             :         }
     132             : 
     133         133 :         if (!data->finished && flags & PSFS_FLAG_FLUSH_CLOSE) {
     134             :                 /* Spit it out! */
     135           3 :                 status = Z_OK;
     136           9 :                 while (status == Z_OK) {
     137           3 :                         status = inflate(&(data->strm), Z_FINISH);
     138           3 :                         if (data->strm.avail_out < data->outbuf_len) {
     139           0 :                                 size_t bucketlen = data->outbuf_len - data->strm.avail_out;
     140             : 
     141           0 :                                 bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0 TSRMLS_CC);
     142           0 :                                 php_stream_bucket_append(buckets_out, bucket TSRMLS_CC);
     143           0 :                                 data->strm.avail_out = data->outbuf_len;
     144           0 :                                 data->strm.next_out = data->outbuf;
     145           0 :                                 exit_status = PSFS_PASS_ON;
     146             :                         }
     147             :                 }
     148             :         }
     149             : 
     150         133 :         if (bytes_consumed) {
     151          69 :                 *bytes_consumed = consumed;
     152             :         }
     153             : 
     154         133 :         return exit_status;
     155             : }
     156             : 
     157          60 : static void php_zlib_inflate_dtor(php_stream_filter *thisfilter TSRMLS_DC)
     158             : {
     159          60 :         if (thisfilter && Z_PTR(thisfilter->abstract)) {
     160          60 :                 php_zlib_filter_data *data = Z_PTR(thisfilter->abstract);
     161          60 :                 if (!data->finished) {
     162           7 :                         inflateEnd(&(data->strm));
     163             :                 }
     164          60 :                 pefree(data->inbuf, data->persistent);
     165          60 :                 pefree(data->outbuf, data->persistent);
     166          60 :                 pefree(data, data->persistent);
     167             :         }
     168          60 : }
     169             : 
     170             : static php_stream_filter_ops php_zlib_inflate_ops = {
     171             :         php_zlib_inflate_filter,
     172             :         php_zlib_inflate_dtor,
     173             :         "zlib.inflate"
     174             : };
     175             : /* }}} */
     176             : 
     177             : /* {{{ zlib.inflate filter implementation */
     178             : 
     179         128 : static php_stream_filter_status_t php_zlib_deflate_filter(
     180             :         php_stream *stream,
     181             :         php_stream_filter *thisfilter,
     182             :         php_stream_bucket_brigade *buckets_in,
     183             :         php_stream_bucket_brigade *buckets_out,
     184             :         size_t *bytes_consumed,
     185             :         int flags
     186             :         TSRMLS_DC)
     187             : {
     188             :         php_zlib_filter_data *data;
     189             :         php_stream_bucket *bucket;
     190         128 :         size_t consumed = 0;
     191             :         int status;
     192         128 :         php_stream_filter_status_t exit_status = PSFS_FEED_ME;
     193             : 
     194         128 :         if (!thisfilter || !Z_PTR(thisfilter->abstract)) {
     195             :                 /* Should never happen */
     196           0 :                 return PSFS_ERR_FATAL;
     197             :         }
     198             : 
     199         128 :         data = (php_zlib_filter_data *)(Z_PTR(thisfilter->abstract));
     200             : 
     201         303 :         while (buckets_in->head) {
     202          47 :                 size_t bin = 0, desired;
     203             : 
     204          47 :                 bucket = buckets_in->head;
     205             : 
     206          47 :                 bucket = php_stream_bucket_make_writeable(bucket TSRMLS_CC);
     207             : 
     208         141 :                 while (bin < (unsigned int) bucket->buflen) {
     209          47 :                         desired = bucket->buflen - bin;
     210          47 :                         if (desired > data->inbuf_len) {
     211           0 :                                 desired = data->inbuf_len;
     212             :                         }
     213          47 :                         memcpy(data->strm.next_in, bucket->buf + bin, desired);
     214          47 :                         data->strm.avail_in = desired;
     215             : 
     216          47 :                         status = deflate(&(data->strm), flags & PSFS_FLAG_FLUSH_CLOSE ? Z_FULL_FLUSH : (flags & PSFS_FLAG_FLUSH_INC ? Z_SYNC_FLUSH : Z_NO_FLUSH));
     217          47 :                         if (status != Z_OK) {
     218             :                                 /* Something bad happened */
     219           0 :                                 php_stream_bucket_delref(bucket TSRMLS_CC);
     220           0 :                                 return PSFS_ERR_FATAL;
     221             :                         }
     222          47 :                         desired -= data->strm.avail_in; /* desired becomes what we consumed this round through */
     223          47 :                         data->strm.next_in = data->inbuf;
     224          47 :                         data->strm.avail_in = 0;
     225          47 :                         bin += desired;
     226             : 
     227          47 :                         if (data->strm.avail_out < data->outbuf_len) {
     228             :                                 php_stream_bucket *out_bucket;
     229          13 :                                 size_t bucketlen = data->outbuf_len - data->strm.avail_out;
     230             : 
     231          13 :                                 out_bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0 TSRMLS_CC);
     232          13 :                                 php_stream_bucket_append(buckets_out, out_bucket TSRMLS_CC);
     233          13 :                                 data->strm.avail_out = data->outbuf_len;
     234          13 :                                 data->strm.next_out = data->outbuf;
     235          13 :                                 exit_status = PSFS_PASS_ON;
     236             :                         }
     237             :                 }
     238          47 :                 consumed += bucket->buflen;
     239          47 :                 php_stream_bucket_delref(bucket TSRMLS_CC);
     240             :         }
     241             : 
     242         128 :         if (flags & PSFS_FLAG_FLUSH_CLOSE) {
     243             :                 /* Spit it out! */
     244          48 :                 status = Z_OK;
     245         144 :                 while (status == Z_OK) {
     246          48 :                         status = deflate(&(data->strm), Z_FINISH);
     247          48 :                         if (data->strm.avail_out < data->outbuf_len) {
     248          48 :                                 size_t bucketlen = data->outbuf_len - data->strm.avail_out;
     249             : 
     250          48 :                                 bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0 TSRMLS_CC);
     251          48 :                                 php_stream_bucket_append(buckets_out, bucket TSRMLS_CC);
     252          48 :                                 data->strm.avail_out = data->outbuf_len;
     253          48 :                                 data->strm.next_out = data->outbuf;
     254          48 :                                 exit_status = PSFS_PASS_ON;
     255             :                         }
     256             :                 }
     257             :         }
     258             : 
     259         128 :         if (bytes_consumed) {
     260          82 :                 *bytes_consumed = consumed;
     261             :         }
     262             : 
     263         128 :         return exit_status;
     264             : }
     265             : 
     266          48 : static void php_zlib_deflate_dtor(php_stream_filter *thisfilter TSRMLS_DC)
     267             : {
     268          48 :         if (thisfilter && Z_PTR(thisfilter->abstract)) {
     269          48 :                 php_zlib_filter_data *data = Z_PTR(thisfilter->abstract);
     270          48 :                 deflateEnd(&(data->strm));
     271          48 :                 pefree(data->inbuf, data->persistent);
     272          48 :                 pefree(data->outbuf, data->persistent);
     273          48 :                 pefree(data, data->persistent);
     274             :         }
     275          48 : }
     276             : 
     277             : static php_stream_filter_ops php_zlib_deflate_ops = {
     278             :         php_zlib_deflate_filter,
     279             :         php_zlib_deflate_dtor,
     280             :         "zlib.deflate"
     281             : };
     282             : 
     283             : /* }}} */
     284             : 
     285             : /* {{{ zlib.* common factory */
     286             : 
     287         108 : static php_stream_filter *php_zlib_filter_create(const char *filtername, zval *filterparams, int persistent TSRMLS_DC)
     288             : {
     289         108 :         php_stream_filter_ops *fops = NULL;
     290             :         php_zlib_filter_data *data;
     291             :         int status;
     292             : 
     293             :         /* Create this filter */
     294         108 :         data = pecalloc(1, sizeof(php_zlib_filter_data), persistent);
     295         108 :         if (!data) {
     296           0 :                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed allocating %zd bytes", sizeof(php_zlib_filter_data));
     297           0 :                 return NULL;
     298             :         }
     299             : 
     300             :         /* Circular reference */
     301         108 :         data->strm.opaque = (voidpf) data;
     302             : 
     303         108 :         data->strm.zalloc = (alloc_func) php_zlib_alloc;
     304         108 :         data->strm.zfree = (free_func) php_zlib_free;
     305         108 :         data->strm.avail_out = data->outbuf_len = data->inbuf_len = 0x8000;
     306         108 :         data->strm.next_in = data->inbuf = (Bytef *) pemalloc(data->inbuf_len, persistent);
     307         108 :         if (!data->inbuf) {
     308           0 :                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed allocating %zd bytes", data->inbuf_len);
     309           0 :                 pefree(data, persistent);
     310           0 :                 return NULL;
     311             :         }
     312         108 :         data->strm.avail_in = 0;
     313         108 :         data->strm.next_out = data->outbuf = (Bytef *) pemalloc(data->outbuf_len, persistent);
     314         108 :         if (!data->outbuf) {
     315           0 :                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed allocating %zd bytes", data->outbuf_len);
     316           0 :                 pefree(data->inbuf, persistent);
     317           0 :                 pefree(data, persistent);
     318           0 :                 return NULL;
     319             :         }
     320             :                 
     321         108 :         data->strm.data_type = Z_ASCII;
     322             : 
     323         108 :         if (strcasecmp(filtername, "zlib.inflate") == 0) {
     324          60 :                 int windowBits = -MAX_WBITS;
     325             : 
     326          60 :                 if (filterparams) {
     327             :                         zval *tmpzval;
     328             : 
     329          38 :                         if ((Z_TYPE_P(filterparams) == IS_ARRAY || Z_TYPE_P(filterparams) == IS_OBJECT) &&
     330          19 :                                 (tmpzval = zend_hash_str_find(HASH_OF(filterparams), "window", sizeof("window") - 1))) {
     331             :                                 zval tmp;
     332             : 
     333             :                                 /* log-2 base of history window (9 - 15) */
     334          19 :                                 ZVAL_DUP(&tmp, tmpzval);
     335          19 :                                 convert_to_long(&tmp);
     336          19 :                                 if (Z_LVAL(tmp) < -MAX_WBITS || Z_LVAL(tmp) > MAX_WBITS + 32) {
     337           0 :                                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid parameter give for window size. (%pd)", Z_LVAL(tmp));
     338             :                                 } else {
     339          19 :                                         windowBits = Z_LVAL(tmp);
     340             :                                 }
     341             :                         }
     342             :                 }
     343             : 
     344             :                 /* RFC 1951 Inflate */
     345          60 :                 data->finished = '\0';
     346          60 :                 status = inflateInit2(&(data->strm), windowBits);
     347          60 :                 fops = &php_zlib_inflate_ops;
     348          48 :         } else if (strcasecmp(filtername, "zlib.deflate") == 0) {
     349             :                 /* RFC 1951 Deflate */
     350          48 :                 int level = Z_DEFAULT_COMPRESSION;
     351          48 :                 int windowBits = -MAX_WBITS;
     352          48 :                 int memLevel = MAX_MEM_LEVEL;
     353             : 
     354             : 
     355          48 :                 if (filterparams) {
     356             :                         zval *tmpzval, tmp;
     357             : 
     358             :                         /* filterparams can either be a scalar value to indicate compression level (shortcut method)
     359             :                Or can be a hash containing one or more of 'window', 'memory', and/or 'level' members. */
     360             : 
     361          14 :                         switch (Z_TYPE_P(filterparams)) {
     362             :                                 case IS_ARRAY:
     363             :                                 case IS_OBJECT:
     364          14 :                                         if ((tmpzval = zend_hash_str_find(HASH_OF(filterparams), "memory", sizeof("memory") -1))) {
     365           0 :                                                 ZVAL_DUP(&tmp, tmpzval);
     366           0 :                                                 convert_to_long(&tmp);
     367             : 
     368             :                                                 /* Memory Level (1 - 9) */
     369           0 :                                                 if (Z_LVAL(tmp) < 1 || Z_LVAL(tmp) > MAX_MEM_LEVEL) {
     370           0 :                                                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid parameter give for memory level. (%pd)", Z_LVAL(tmp));
     371             :                                                 } else {
     372           0 :                                                         memLevel = Z_LVAL(tmp);
     373             :                                                 }
     374             :                                         }
     375             : 
     376          14 :                                         if ((tmpzval = zend_hash_str_find(HASH_OF(filterparams), "window", sizeof("window") - 1))) {
     377          13 :                                                 ZVAL_DUP(&tmp, tmpzval);
     378          13 :                                                 convert_to_long(&tmp);
     379             : 
     380             :                                                 /* log-2 base of history window (9 - 15) */
     381          13 :                                                 if (Z_LVAL(tmp) < -MAX_WBITS || Z_LVAL(tmp) > MAX_WBITS + 16) {
     382           0 :                                                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid parameter give for window size. (%pd)", Z_LVAL(tmp));
     383             :                                                 } else {
     384          13 :                                                         windowBits = Z_LVAL(tmp);
     385             :                                                 }
     386             :                                         }
     387             : 
     388          14 :                                         if ((tmpzval = zend_hash_str_find(HASH_OF(filterparams), "level", sizeof("level") - 1))) {
     389           1 :                                                 ZVAL_COPY_VALUE(&tmp, tmpzval);
     390             : 
     391             :                                                 /* Psuedo pass through to catch level validating code */
     392           1 :                                                 goto factory_setlevel;
     393             :                                         }
     394          13 :                                         break;
     395             :                                 case IS_STRING:
     396             :                                 case IS_DOUBLE:
     397             :                                 case IS_LONG:
     398           0 :                                         ZVAL_COPY_VALUE(&tmp, filterparams);
     399             : factory_setlevel:
     400             :                                         zval_copy_ctor(&tmp);
     401           1 :                                         convert_to_long(&tmp);
     402             : 
     403             :                                         /* Set compression level within reason (-1 == default, 0 == none, 1-9 == least to most compression */
     404           1 :                                         if (Z_LVAL(tmp) < -1 || Z_LVAL(tmp) > 9) {
     405           0 :                                                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid compression level specified. (%pd)", Z_LVAL(tmp));
     406             :                                         } else {
     407           1 :                                                 level = Z_LVAL(tmp);
     408             :                                         }
     409           1 :                                         break;
     410             :                                 default:
     411           0 :                                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid filter parameter, ignored");
     412             :                         }
     413             :                 }
     414          48 :                 status = deflateInit2(&(data->strm), level, Z_DEFLATED, windowBits, memLevel, 0);
     415          48 :                 fops = &php_zlib_deflate_ops;
     416             :         } else {
     417           0 :                 status = Z_DATA_ERROR;
     418             :         }
     419             : 
     420         108 :         if (status != Z_OK) {
     421             :                 /* Unspecified (probably strm) error, let stream-filter error do its own whining */
     422           0 :                 pefree(data->strm.next_in, persistent);
     423           0 :                 pefree(data->strm.next_out, persistent);
     424           0 :                 pefree(data, persistent);
     425           0 :                 return NULL;
     426             :         }
     427             : 
     428         108 :         return php_stream_filter_alloc(fops, data, persistent);
     429             : }
     430             : 
     431             : php_stream_filter_factory php_zlib_filter_factory = {
     432             :         php_zlib_filter_create
     433             : };
     434             : /* }}} */
     435             : 
     436             : /*
     437             :  * Local variables:
     438             :  * tab-width: 4
     439             :  * c-basic-offset: 4
     440             :  * End:
     441             :  * vim600: sw=4 ts=4 fdm=marker
     442             :  * vim<600: sw=4 ts=4
     443             :  */

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Generated at Fri, 19 Sep 2014 17:11:20 +0000 (4 days ago)

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