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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2016 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. |
+----------------------------------------------------------------------+
| Authors: Sara Golemon (pollita@php.net) |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_bz2.h"
/* {{{ data structure */
enum strm_status {
PHP_BZ2_UNITIALIZED,
PHP_BZ2_RUNNING,
PHP_BZ2_FINISHED
};
typedef struct _php_bz2_filter_data {
bz_stream strm;
char *inbuf;
char *outbuf;
size_t inbuf_len;
size_t outbuf_len;
enum strm_status status; /* Decompress option */
unsigned int small_footprint : 1; /* Decompress option */
unsigned int expect_concatenated : 1; /* Decompress option */
int persistent;
} php_bz2_filter_data;
/* }}} */
/* {{{ Memory management wrappers */
static void *php_bz2_alloc(void *opaque, int items, int size)
{
return (void *)safe_pemalloc(items, size, 0, ((php_bz2_filter_data*)opaque)->persistent);
}
static void php_bz2_free(void *opaque, void *address)
{
pefree((void *)address, ((php_bz2_filter_data*)opaque)->persistent);
}
/* }}} */
/* {{{ bzip2.decompress filter implementation */
static php_stream_filter_status_t php_bz2_decompress_filter(
php_stream *stream,
php_stream_filter *thisfilter,
php_stream_bucket_brigade *buckets_in,
php_stream_bucket_brigade *buckets_out,
size_t *bytes_consumed,
int flags
)
{
php_bz2_filter_data *data;
php_stream_bucket *bucket;
size_t consumed = 0;
int status;
php_stream_filter_status_t exit_status = PSFS_FEED_ME;
bz_stream *streamp;
if (!Z_PTR(thisfilter->abstract)) {
/* Should never happen */
return PSFS_ERR_FATAL;
}
data = (php_bz2_filter_data *)Z_PTR(thisfilter->abstract);
streamp = &(data->strm);
while (buckets_in->head) {
size_t bin = 0, desired;
bucket = php_stream_bucket_make_writeable(buckets_in->head);
while (bin < bucket->buflen) {
if (data->status == PHP_BZ2_UNITIALIZED) {
status = BZ2_bzDecompressInit(streamp, 0, data->small_footprint);
if (BZ_OK != status) {
php_stream_bucket_delref(bucket);
return PSFS_ERR_FATAL;
}
data->status = PHP_BZ2_RUNNING;
}
if (data->status != PHP_BZ2_RUNNING) {
consumed += bucket->buflen;
break;
}
desired = bucket->buflen - bin;
if (desired > data->inbuf_len) {
desired = data->inbuf_len;
}
memcpy(data->strm.next_in, bucket->buf + bin, desired);
data->strm.avail_in = desired;
status = BZ2_bzDecompress(&(data->strm));
if (status == BZ_STREAM_END) {
BZ2_bzDecompressEnd(&(data->strm));
if (data->expect_concatenated) {
data->status = PHP_BZ2_UNITIALIZED;
} else {
data->status = PHP_BZ2_FINISHED;
}
} else if (status != BZ_OK) {
/* Something bad happened */
php_stream_bucket_delref(bucket);
return PSFS_ERR_FATAL;
}
desired -= data->strm.avail_in; /* desired becomes what we consumed this round through */
data->strm.next_in = data->inbuf;
data->strm.avail_in = 0;
consumed += desired;
bin += desired;
if (data->strm.avail_out < data->outbuf_len) {
php_stream_bucket *out_bucket;
size_t bucketlen = data->outbuf_len - data->strm.avail_out;
out_bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0);
php_stream_bucket_append(buckets_out, out_bucket);
data->strm.avail_out = data->outbuf_len;
data->strm.next_out = data->outbuf;
exit_status = PSFS_PASS_ON;
} else if (status == BZ_STREAM_END && data->strm.avail_out >= data->outbuf_len) {
/* no more data to decompress, and nothing was spat out */
php_stream_bucket_delref(bucket);
return PSFS_PASS_ON;
}
}
php_stream_bucket_delref(bucket);
}
if ((data->status == PHP_BZ2_RUNNING) && (flags & PSFS_FLAG_FLUSH_CLOSE)) {
/* Spit it out! */
status = BZ_OK;
while (status == BZ_OK) {
status = BZ2_bzDecompress(&(data->strm));
if (data->strm.avail_out < data->outbuf_len) {
size_t bucketlen = data->outbuf_len - data->strm.avail_out;
bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0);
php_stream_bucket_append(buckets_out, bucket);
data->strm.avail_out = data->outbuf_len;
data->strm.next_out = data->outbuf;
exit_status = PSFS_PASS_ON;
} else if (status == BZ_OK) {
break;
}
}
}
if (bytes_consumed) {
*bytes_consumed = consumed;
}
return exit_status;
}
static void php_bz2_decompress_dtor(php_stream_filter *thisfilter)
{
if (thisfilter && Z_PTR(thisfilter->abstract)) {
php_bz2_filter_data *data = Z_PTR(thisfilter->abstract);
if (data->status == PHP_BZ2_RUNNING) {
BZ2_bzDecompressEnd(&(data->strm));
}
pefree(data->inbuf, data->persistent);
pefree(data->outbuf, data->persistent);
pefree(data, data->persistent);
}
}
static php_stream_filter_ops php_bz2_decompress_ops = {
php_bz2_decompress_filter,
php_bz2_decompress_dtor,
"bzip2.decompress"
};
/* }}} */
/* {{{ bzip2.compress filter implementation */
static php_stream_filter_status_t php_bz2_compress_filter(
php_stream *stream,
php_stream_filter *thisfilter,
php_stream_bucket_brigade *buckets_in,
php_stream_bucket_brigade *buckets_out,
size_t *bytes_consumed,
int flags
)
{
php_bz2_filter_data *data;
php_stream_bucket *bucket;
size_t consumed = 0;
int status;
php_stream_filter_status_t exit_status = PSFS_FEED_ME;
if (!Z_PTR(thisfilter->abstract)) {
/* Should never happen */
return PSFS_ERR_FATAL;
}
data = (php_bz2_filter_data *)Z_PTR(thisfilter->abstract);
while (buckets_in->head) {
size_t bin = 0, desired;
bucket = php_stream_bucket_make_writeable(buckets_in->head);
while (bin < bucket->buflen) {
desired = bucket->buflen - bin;
if (desired > data->inbuf_len) {
desired = data->inbuf_len;
}
memcpy(data->strm.next_in, bucket->buf + bin, desired);
data->strm.avail_in = desired;
status = BZ2_bzCompress(&(data->strm), flags & PSFS_FLAG_FLUSH_CLOSE ? BZ_FINISH : (flags & PSFS_FLAG_FLUSH_INC ? BZ_FLUSH : BZ_RUN));
if (status != BZ_RUN_OK && status != BZ_FLUSH_OK && status != BZ_FINISH_OK) {
/* Something bad happened */
php_stream_bucket_delref(bucket);
return PSFS_ERR_FATAL;
}
desired -= data->strm.avail_in; /* desired becomes what we consumed this round through */
data->strm.next_in = data->inbuf;
data->strm.avail_in = 0;
consumed += desired;
bin += desired;
if (data->strm.avail_out < data->outbuf_len) {
php_stream_bucket *out_bucket;
size_t bucketlen = data->outbuf_len - data->strm.avail_out;
out_bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0);
php_stream_bucket_append(buckets_out, out_bucket);
data->strm.avail_out = data->outbuf_len;
data->strm.next_out = data->outbuf;
exit_status = PSFS_PASS_ON;
}
}
php_stream_bucket_delref(bucket);
}
if (flags & PSFS_FLAG_FLUSH_CLOSE) {
/* Spit it out! */
status = BZ_FINISH_OK;
while (status == BZ_FINISH_OK) {
status = BZ2_bzCompress(&(data->strm), BZ_FINISH);
if (data->strm.avail_out < data->outbuf_len) {
size_t bucketlen = data->outbuf_len - data->strm.avail_out;
bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0);
php_stream_bucket_append(buckets_out, bucket);
data->strm.avail_out = data->outbuf_len;
data->strm.next_out = data->outbuf;
exit_status = PSFS_PASS_ON;
}
}
}
if (bytes_consumed) {
*bytes_consumed = consumed;
}
return exit_status;
}
static void php_bz2_compress_dtor(php_stream_filter *thisfilter)
{
if (Z_PTR(thisfilter->abstract)) {
php_bz2_filter_data *data = Z_PTR(thisfilter->abstract);
BZ2_bzCompressEnd(&(data->strm));
pefree(data->inbuf, data->persistent);
pefree(data->outbuf, data->persistent);
pefree(data, data->persistent);
}
}
static php_stream_filter_ops php_bz2_compress_ops = {
php_bz2_compress_filter,
php_bz2_compress_dtor,
"bzip2.compress"
};
/* }}} */
/* {{{ bzip2.* common factory */
static php_stream_filter *php_bz2_filter_create(const char *filtername, zval *filterparams, uint8_t persistent)
{
php_stream_filter_ops *fops = NULL;
php_bz2_filter_data *data;
int status = BZ_OK;
/* Create this filter */
data = pecalloc(1, sizeof(php_bz2_filter_data), persistent);
if (!data) {
php_error_docref(NULL, E_WARNING, "Failed allocating %zu bytes", sizeof(php_bz2_filter_data));
return NULL;
}
/* Circular reference */
data->strm.opaque = (void *) data;
data->strm.bzalloc = php_bz2_alloc;
data->strm.bzfree = php_bz2_free;
data->persistent = persistent;
data->strm.avail_out = data->outbuf_len = data->inbuf_len = 2048;
data->strm.next_in = data->inbuf = (char *) pemalloc(data->inbuf_len, persistent);
if (!data->inbuf) {
php_error_docref(NULL, E_WARNING, "Failed allocating %zu bytes", data->inbuf_len);
pefree(data, persistent);
return NULL;
}
data->strm.avail_in = 0;
data->strm.next_out = data->outbuf = (char *) pemalloc(data->outbuf_len, persistent);
if (!data->outbuf) {
php_error_docref(NULL, E_WARNING, "Failed allocating %zu bytes", data->outbuf_len);
pefree(data->inbuf, persistent);
pefree(data, persistent);
return NULL;
}
if (strcasecmp(filtername, "bzip2.decompress") == 0) {
data->small_footprint = 0;
data->expect_concatenated = 0;
if (filterparams) {
zval *tmpzval = NULL;
if (Z_TYPE_P(filterparams) == IS_ARRAY || Z_TYPE_P(filterparams) == IS_OBJECT) {
if ((tmpzval = zend_hash_str_find(HASH_OF(filterparams), "concatenated", sizeof("concatenated")-1))) {
data->expect_concatenated = zend_is_true(tmpzval);
tmpzval = NULL;
}
tmpzval = zend_hash_str_find(HASH_OF(filterparams), "small", sizeof("small")-1);
} else {
tmpzval = filterparams;
}
if (tmpzval) {
data->small_footprint = zend_is_true(tmpzval);
}
}
data->status = PHP_BZ2_UNITIALIZED;
fops = &php_bz2_decompress_ops;
} else if (strcasecmp(filtername, "bzip2.compress") == 0) {
int blockSize100k = PHP_BZ2_FILTER_DEFAULT_BLOCKSIZE;
int workFactor = PHP_BZ2_FILTER_DEFAULT_WORKFACTOR;
if (filterparams) {
zval *tmpzval;
if (Z_TYPE_P(filterparams) == IS_ARRAY || Z_TYPE_P(filterparams) == IS_OBJECT) {
if ((tmpzval = zend_hash_str_find(HASH_OF(filterparams), "blocks", sizeof("blocks")-1))) {
/* How much memory to allocate (1 - 9) x 100kb */
zend_long blocks = zval_get_long(tmpzval);
if (blocks < 1 || blocks > 9) {
php_error_docref(NULL, E_WARNING, "Invalid parameter given for number of blocks to allocate. (" ZEND_LONG_FMT ")", blocks);
} else {
blockSize100k = (int) blocks;
}
}
if ((tmpzval = zend_hash_str_find(HASH_OF(filterparams), "work", sizeof("work")-1))) {
/* Work Factor (0 - 250) */
zend_long work = zval_get_long(tmpzval);
if (work < 0 || work > 250) {
php_error_docref(NULL, E_WARNING, "Invalid parameter given for work factor. (" ZEND_LONG_FMT ")", work);
} else {
workFactor = (int) work;
}
}
}
}
status = BZ2_bzCompressInit(&(data->strm), blockSize100k, 0, workFactor);
fops = &php_bz2_compress_ops;
} else {
status = BZ_DATA_ERROR;
}
if (status != BZ_OK) {
/* Unspecified (probably strm) error, let stream-filter error do its own whining */
pefree(data->strm.next_in, persistent);
pefree(data->strm.next_out, persistent);
pefree(data, persistent);
return NULL;
}
return php_stream_filter_alloc(fops, data, persistent);
}
php_stream_filter_factory php_bz2_filter_factory = {
php_bz2_filter_create
};
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/