1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2015 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: Wez Furlong <wez@thebrainroom.com>, based on work by: |
16 | Hartmut Holzgraefe <hholzgra@php.net> |
17 +----------------------------------------------------------------------+
18 */
19
20 /* $Id$ */
21
22 #define _GNU_SOURCE
23
24 #include "php.h"
25 #include "php_zlib.h"
26 #include "fopen_wrappers.h"
27
28 struct php_gz_stream_data_t {
29 gzFile gz_file;
30 php_stream *stream;
31 };
32
php_gziop_read(php_stream * stream,char * buf,size_t count TSRMLS_DC)33 static size_t php_gziop_read(php_stream *stream, char *buf, size_t count TSRMLS_DC)
34 {
35 struct php_gz_stream_data_t *self = (struct php_gz_stream_data_t *) stream->abstract;
36 int read;
37
38 read = gzread(self->gz_file, buf, count);
39
40 if (gzeof(self->gz_file)) {
41 stream->eof = 1;
42 }
43
44 return (read < 0) ? 0 : read;
45 }
46
php_gziop_write(php_stream * stream,const char * buf,size_t count TSRMLS_DC)47 static size_t php_gziop_write(php_stream *stream, const char *buf, size_t count TSRMLS_DC)
48 {
49 struct php_gz_stream_data_t *self = (struct php_gz_stream_data_t *) stream->abstract;
50 int wrote;
51
52 wrote = gzwrite(self->gz_file, (char *) buf, count);
53
54 return (wrote < 0) ? 0 : wrote;
55 }
56
php_gziop_seek(php_stream * stream,off_t offset,int whence,off_t * newoffs TSRMLS_DC)57 static int php_gziop_seek(php_stream *stream, off_t offset, int whence, off_t *newoffs TSRMLS_DC)
58 {
59 struct php_gz_stream_data_t *self = (struct php_gz_stream_data_t *) stream->abstract;
60
61 assert(self != NULL);
62
63 if (whence == SEEK_END) {
64 php_error_docref(NULL TSRMLS_CC, E_WARNING, "SEEK_END is not supported");
65 return -1;
66 }
67 *newoffs = gzseek(self->gz_file, offset, whence);
68
69 return (*newoffs < 0) ? -1 : 0;
70 }
71
php_gziop_close(php_stream * stream,int close_handle TSRMLS_DC)72 static int php_gziop_close(php_stream *stream, int close_handle TSRMLS_DC)
73 {
74 struct php_gz_stream_data_t *self = (struct php_gz_stream_data_t *) stream->abstract;
75 int ret = EOF;
76
77 if (close_handle) {
78 if (self->gz_file) {
79 ret = gzclose(self->gz_file);
80 self->gz_file = NULL;
81 }
82 if (self->stream) {
83 php_stream_close(self->stream);
84 self->stream = NULL;
85 }
86 }
87 efree(self);
88
89 return ret;
90 }
91
php_gziop_flush(php_stream * stream TSRMLS_DC)92 static int php_gziop_flush(php_stream *stream TSRMLS_DC)
93 {
94 struct php_gz_stream_data_t *self = (struct php_gz_stream_data_t *) stream->abstract;
95
96 return gzflush(self->gz_file, Z_SYNC_FLUSH);
97 }
98
99 php_stream_ops php_stream_gzio_ops = {
100 php_gziop_write, php_gziop_read,
101 php_gziop_close, php_gziop_flush,
102 "ZLIB",
103 php_gziop_seek,
104 NULL, /* cast */
105 NULL, /* stat */
106 NULL /* set_option */
107 };
108
php_stream_gzopen(php_stream_wrapper * wrapper,char * path,char * mode,int options,char ** opened_path,php_stream_context * context STREAMS_DC TSRMLS_DC)109 php_stream *php_stream_gzopen(php_stream_wrapper *wrapper, char *path, char *mode, int options,
110 char **opened_path, php_stream_context *context STREAMS_DC TSRMLS_DC)
111 {
112 struct php_gz_stream_data_t *self;
113 php_stream *stream = NULL, *innerstream = NULL;
114
115 /* sanity check the stream: it can be either read-only or write-only */
116 if (strchr(mode, '+')) {
117 if (options & REPORT_ERRORS) {
118 php_error_docref(NULL TSRMLS_CC, E_WARNING, "cannot open a zlib stream for reading and writing at the same time!");
119 }
120 return NULL;
121 }
122
123 if (strncasecmp("compress.zlib://", path, 16) == 0) {
124 path += 16;
125 } else if (strncasecmp("zlib:", path, 5) == 0) {
126 path += 5;
127 }
128
129 innerstream = php_stream_open_wrapper_ex(path, mode, STREAM_MUST_SEEK | options | STREAM_WILL_CAST, opened_path, context);
130
131 if (innerstream) {
132 int fd;
133
134 if (SUCCESS == php_stream_cast(innerstream, PHP_STREAM_AS_FD, (void **) &fd, REPORT_ERRORS)) {
135 self = emalloc(sizeof(*self));
136 self->stream = innerstream;
137 self->gz_file = gzdopen(dup(fd), mode);
138
139 if (self->gz_file) {
140 stream = php_stream_alloc_rel(&php_stream_gzio_ops, self, 0, mode);
141 if (stream) {
142 stream->flags |= PHP_STREAM_FLAG_NO_BUFFER;
143 return stream;
144 }
145
146 gzclose(self->gz_file);
147 }
148
149 efree(self);
150 if (options & REPORT_ERRORS) {
151 php_error_docref(NULL TSRMLS_CC, E_WARNING, "gzopen failed");
152 }
153 }
154
155 php_stream_close(innerstream);
156 }
157
158 return NULL;
159 }
160
161 static php_stream_wrapper_ops gzip_stream_wops = {
162 php_stream_gzopen,
163 NULL, /* close */
164 NULL, /* stat */
165 NULL, /* stat_url */
166 NULL, /* opendir */
167 "ZLIB",
168 NULL, /* unlink */
169 NULL, /* rename */
170 NULL, /* mkdir */
171 NULL /* rmdir */
172 };
173
174 php_stream_wrapper php_stream_gzip_wrapper = {
175 &gzip_stream_wops,
176 NULL,
177 0, /* is_url */
178 };
179
180 /*
181 * Local variables:
182 * tab-width: 4
183 * c-basic-offset: 4
184 * End:
185 * vim600: noet sw=4 ts=4 fdm=marker
186 * vim<600: noet sw=4 ts=4
187 */
188
