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422 lines
13 KiB
C
422 lines
13 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 5 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2006 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Sara Golemon (pollita@php.net) |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "php.h"
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#include "php_zlib.h"
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/* {{{ data structure */
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/* Passed as opaque in malloc callbacks */
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typedef struct _php_zlib_filter_data {
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int persistent;
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z_stream strm;
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char *inbuf;
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size_t inbuf_len;
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char *outbuf;
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size_t outbuf_len;
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} php_zlib_filter_data;
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/* }}} */
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/* {{{ Memory management wrappers */
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static voidpf php_zlib_alloc(voidpf opaque, uInt items, uInt size)
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{
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return (voidpf)safe_pemalloc(items, size, 0, ((php_zlib_filter_data*)opaque)->persistent);
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}
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static void php_zlib_free(voidpf opaque, voidpf address)
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{
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pefree((void*)address, ((php_zlib_filter_data*)opaque)->persistent);
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}
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/* }}} */
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/* {{{ zlib.inflate filter implementation */
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static php_stream_filter_status_t php_zlib_inflate_filter(
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php_stream *stream,
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php_stream_filter *thisfilter,
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php_stream_bucket_brigade *buckets_in,
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php_stream_bucket_brigade *buckets_out,
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size_t *bytes_consumed,
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int flags
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TSRMLS_DC)
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{
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php_zlib_filter_data *data;
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php_stream_bucket *bucket;
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size_t consumed = 0, original_out, original_in;
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int status;
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php_stream_filter_status_t exit_status = PSFS_FEED_ME;
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z_stream *streamp;
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if (!thisfilter || !thisfilter->abstract) {
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/* Should never happen */
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return PSFS_ERR_FATAL;
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}
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data = (php_zlib_filter_data *)(thisfilter->abstract);
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streamp = &(data->strm);
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original_in = data->strm.total_in;
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original_out = data->strm.total_out;
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while (buckets_in->head) {
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size_t bin = 0, desired;
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bucket = php_stream_bucket_make_writeable(buckets_in->head TSRMLS_CC);
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while (bin < bucket->buflen) {
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desired = bucket->buflen - bin;
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if (desired > data->inbuf_len) {
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desired = data->inbuf_len;
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}
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memcpy(data->strm.next_in, bucket->buf + bin, desired);
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data->strm.avail_in = desired;
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status = inflate(&(data->strm), flags & PSFS_FLAG_FLUSH_CLOSE ? Z_FINISH : Z_SYNC_FLUSH);
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if (status != Z_OK && status != Z_STREAM_END) {
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/* Something bad happened */
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php_stream_bucket_delref(bucket TSRMLS_CC);
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return PSFS_ERR_FATAL;
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}
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desired -= data->strm.avail_in; /* desired becomes what we consumed this round through */
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data->strm.next_in = data->inbuf;
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data->strm.avail_in = 0;
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consumed += desired;
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bin += desired;
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if (data->strm.avail_out < data->outbuf_len) {
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php_stream_bucket *out_bucket;
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size_t bucketlen = data->outbuf_len - data->strm.avail_out;
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out_bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0 TSRMLS_CC);
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php_stream_bucket_append(buckets_out, out_bucket TSRMLS_CC);
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data->strm.avail_out = data->outbuf_len;
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data->strm.next_out = data->outbuf;
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exit_status = PSFS_PASS_ON;
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}
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}
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php_stream_bucket_delref(bucket TSRMLS_CC);
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}
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if (flags & PSFS_FLAG_FLUSH_CLOSE) {
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/* Spit it out! */
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status = Z_OK;
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while (status == Z_OK) {
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status = inflate(&(data->strm), Z_FINISH);
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if (data->strm.avail_out < data->outbuf_len) {
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size_t bucketlen = data->outbuf_len - data->strm.avail_out;
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bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0 TSRMLS_CC);
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php_stream_bucket_append(buckets_out, bucket TSRMLS_CC);
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data->strm.avail_out = data->outbuf_len;
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data->strm.next_out = data->outbuf;
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exit_status = PSFS_PASS_ON;
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}
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}
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}
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if (bytes_consumed) {
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*bytes_consumed = consumed;
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}
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return exit_status;
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}
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static void php_zlib_inflate_dtor(php_stream_filter *thisfilter TSRMLS_DC)
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{
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if (thisfilter && thisfilter->abstract) {
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php_zlib_filter_data *data = thisfilter->abstract;
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inflateEnd(&(data->strm));
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pefree(data->inbuf, data->persistent);
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pefree(data->outbuf, data->persistent);
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pefree(data, data->persistent);
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}
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}
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static php_stream_filter_ops php_zlib_inflate_ops = {
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php_zlib_inflate_filter,
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php_zlib_inflate_dtor,
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"zlib.inflate"
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};
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/* }}} */
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/* {{{ zlib.inflate filter implementation */
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static php_stream_filter_status_t php_zlib_deflate_filter(
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php_stream *stream,
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php_stream_filter *thisfilter,
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php_stream_bucket_brigade *buckets_in,
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php_stream_bucket_brigade *buckets_out,
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size_t *bytes_consumed,
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int flags
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TSRMLS_DC)
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{
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php_zlib_filter_data *data;
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php_stream_bucket *bucket;
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size_t consumed = 0, original_out, original_in;
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int status;
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php_stream_filter_status_t exit_status = PSFS_FEED_ME;
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z_stream *streamp;
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if (!thisfilter || !thisfilter->abstract) {
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/* Should never happen */
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return PSFS_ERR_FATAL;
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}
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data = (php_zlib_filter_data *)(thisfilter->abstract);
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streamp = &(data->strm);
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original_in = data->strm.total_in;
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original_out = data->strm.total_out;
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while (buckets_in->head) {
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size_t bin = 0, desired;
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bucket = php_stream_bucket_make_writeable(buckets_in->head TSRMLS_CC);
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while (bin < bucket->buflen) {
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desired = bucket->buflen - bin;
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if (desired > data->inbuf_len) {
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desired = data->inbuf_len;
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}
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memcpy(data->strm.next_in, bucket->buf + bin, desired);
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data->strm.avail_in = desired;
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status = deflate(&(data->strm), flags & PSFS_FLAG_FLUSH_CLOSE ? Z_FULL_FLUSH : (flags & PSFS_FLAG_FLUSH_INC ? Z_SYNC_FLUSH : Z_NO_FLUSH));
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if (status != Z_OK) {
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/* Something bad happened */
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php_stream_bucket_delref(bucket TSRMLS_CC);
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return PSFS_ERR_FATAL;
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}
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desired -= data->strm.avail_in; /* desired becomes what we consumed this round through */
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data->strm.next_in = data->inbuf;
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data->strm.avail_in = 0;
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consumed += desired;
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bin += desired;
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if (data->strm.avail_out < data->outbuf_len) {
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php_stream_bucket *out_bucket;
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size_t bucketlen = data->outbuf_len - data->strm.avail_out;
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out_bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0 TSRMLS_CC);
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php_stream_bucket_append(buckets_out, out_bucket TSRMLS_CC);
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data->strm.avail_out = data->outbuf_len;
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data->strm.next_out = data->outbuf;
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exit_status = PSFS_PASS_ON;
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}
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}
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php_stream_bucket_delref(bucket TSRMLS_CC);
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}
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if (flags & PSFS_FLAG_FLUSH_CLOSE) {
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/* Spit it out! */
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status = Z_OK;
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while (status == Z_OK) {
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status = deflate(&(data->strm), Z_FINISH);
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if (data->strm.avail_out < data->outbuf_len) {
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size_t bucketlen = data->outbuf_len - data->strm.avail_out;
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bucket = php_stream_bucket_new(stream, estrndup(data->outbuf, bucketlen), bucketlen, 1, 0 TSRMLS_CC);
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php_stream_bucket_append(buckets_out, bucket TSRMLS_CC);
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data->strm.avail_out = data->outbuf_len;
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data->strm.next_out = data->outbuf;
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exit_status = PSFS_PASS_ON;
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}
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}
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}
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if (bytes_consumed) {
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*bytes_consumed = consumed;
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}
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return exit_status;
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}
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static void php_zlib_deflate_dtor(php_stream_filter *thisfilter TSRMLS_DC)
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{
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if (thisfilter && thisfilter->abstract) {
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php_zlib_filter_data *data = thisfilter->abstract;
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deflateEnd(&(data->strm));
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pefree(data->inbuf, data->persistent);
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pefree(data->outbuf, data->persistent);
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pefree(data, data->persistent);
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}
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}
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static php_stream_filter_ops php_zlib_deflate_ops = {
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php_zlib_deflate_filter,
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php_zlib_deflate_dtor,
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"zlib.deflate"
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};
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/* }}} */
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/* {{{ zlib.* common factory */
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static php_stream_filter *php_zlib_filter_create(const char *filtername, zval *filterparams, int persistent TSRMLS_DC)
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{
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php_stream_filter_ops *fops = NULL;
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php_zlib_filter_data *data;
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int status;
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/* Create this filter */
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data = pecalloc(1, sizeof(php_zlib_filter_data), persistent);
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if (!data) {
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php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed allocating %ld bytes.", sizeof(php_zlib_filter_data));
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return NULL;
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}
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/* Circular reference */
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data->strm.opaque = (voidpf) data;
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data->strm.zalloc = (alloc_func) php_zlib_alloc;
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data->strm.zfree = (free_func) php_zlib_free;
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data->strm.avail_out = data->outbuf_len = data->inbuf_len = 2048;
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data->strm.next_in = data->inbuf = (Bytef *) pemalloc(data->inbuf_len, persistent);
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if (!data->inbuf) {
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php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed allocating %ld bytes.", data->inbuf_len);
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pefree(data, persistent);
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return NULL;
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}
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data->strm.avail_in = 0;
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data->strm.next_out = data->outbuf = (Bytef *) pemalloc(data->outbuf_len, persistent);
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if (!data->outbuf) {
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php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed allocating %ld bytes.", data->outbuf_len);
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pefree(data->inbuf, persistent);
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pefree(data, persistent);
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return NULL;
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}
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data->strm.data_type = Z_ASCII;
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if (strcasecmp(filtername, "zlib.inflate") == 0) {
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int windowBits = -MAX_WBITS;
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if (filterparams) {
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zval **tmpzval;
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if ((Z_TYPE_P(filterparams) == IS_ARRAY || Z_TYPE_P(filterparams) == IS_OBJECT) &&
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zend_hash_find(HASH_OF(filterparams), "window", sizeof("window"), (void **) &tmpzval) == SUCCESS) {
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/* log-2 base of history window (9 - 15) */
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SEPARATE_ZVAL(tmpzval);
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convert_to_long_ex(tmpzval);
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if (Z_LVAL_PP(tmpzval) < -MAX_WBITS || Z_LVAL_PP(tmpzval) > MAX_WBITS) {
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php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid parameter give for window size. (%ld)", Z_LVAL_PP(tmpzval));
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} else {
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windowBits = Z_LVAL_PP(tmpzval);
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}
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zval_ptr_dtor(tmpzval);
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}
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}
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/* RFC 1951 Inflate */
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status = inflateInit2(&(data->strm), windowBits);
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fops = &php_zlib_inflate_ops;
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} else if (strcasecmp(filtername, "zlib.deflate") == 0) {
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/* RFC 1951 Deflate */
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int level = Z_DEFAULT_COMPRESSION;
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int windowBits = -MAX_WBITS;
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int memLevel = MAX_MEM_LEVEL;
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if (filterparams) {
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zval **tmpzval;
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/* filterparams can either be a scalar value to indicate compression level (shortcut method)
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Or can be a hash containing one or more of 'window', 'memory', and/or 'level' members. */
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switch (Z_TYPE_P(filterparams)) {
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case IS_ARRAY:
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case IS_OBJECT:
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if (zend_hash_find(HASH_OF(filterparams), "memory", sizeof("memory"), (void**) &tmpzval) == SUCCESS) {
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/* Memory Level (1 - 9) */
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SEPARATE_ZVAL(tmpzval);
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convert_to_long_ex(tmpzval);
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if (Z_LVAL_PP(tmpzval) < 1 || Z_LVAL_PP(tmpzval) > MAX_MEM_LEVEL) {
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php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid parameter give for memory level. (%ld)", Z_LVAL_PP(tmpzval));
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} else {
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memLevel = Z_LVAL_PP(tmpzval);
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}
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zval_ptr_dtor(tmpzval);
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}
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if (zend_hash_find(HASH_OF(filterparams), "window", sizeof("window"), (void**) &tmpzval) == SUCCESS) {
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/* log-2 base of history window (9 - 15) */
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SEPARATE_ZVAL(tmpzval);
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convert_to_long_ex(tmpzval);
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if (Z_LVAL_PP(tmpzval) < -MAX_WBITS || Z_LVAL_PP(tmpzval) > MAX_WBITS) {
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php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid parameter give for window size. (%ld)", Z_LVAL_PP(tmpzval));
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} else {
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windowBits = Z_LVAL_PP(tmpzval);
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}
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zval_ptr_dtor(tmpzval);
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}
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if (zend_hash_find(HASH_OF(filterparams), "level", sizeof("level"), (void**) &tmpzval) == SUCCESS) {
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/* Psuedo pass through to catch level validating code */
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goto factory_setlevel;
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}
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break;
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case IS_STRING:
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case IS_DOUBLE:
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case IS_LONG:
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tmpzval = &filterparams;
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factory_setlevel:
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/* Set compression level within reason (-1 == default, 0 == none, 1-9 == least to most compression */
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SEPARATE_ZVAL(tmpzval);
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convert_to_long_ex(tmpzval);
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if (Z_LVAL_PP(tmpzval) < -1 || Z_LVAL_PP(tmpzval) > 9) {
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php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid compression level specified. (%ld)", Z_LVAL_PP(tmpzval));
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} else {
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level = Z_LVAL_PP(tmpzval);
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}
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zval_ptr_dtor(tmpzval);
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break;
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default:
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php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid filter parameter, ignored.");
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}
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}
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status = deflateInit2(&(data->strm), level, Z_DEFLATED, windowBits, memLevel, 0);
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fops = &php_zlib_deflate_ops;
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} else {
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status = Z_DATA_ERROR;
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}
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if (status != Z_OK) {
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/* Unspecified (probably strm) error, let stream-filter error do its own whining */
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pefree(data->strm.next_in, persistent);
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pefree(data->strm.next_out, persistent);
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pefree(data, persistent);
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return NULL;
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}
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return php_stream_filter_alloc(fops, data, persistent);
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}
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php_stream_filter_factory php_zlib_filter_factory = {
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php_zlib_filter_create
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};
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/* }}} */
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: sw=4 ts=4 fdm=marker
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* vim<600: sw=4 ts=4
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*/
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