FreeTDS API

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stream.h
1/* FreeTDS - Library of routines accessing Sybase and Microsoft databases
2 * Copyright (C) 2013 Frediano Ziglio
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
18 */
19
20#ifndef _tdsguard_a5iqP6Ed7kDGP9L1OvOL7W_
21#define _tdsguard_a5iqP6Ed7kDGP9L1OvOL7W_
22
23#ifndef _tdsguard_hfOrWb5znoUCWdBPoNQvqN_
24#error Include tds.h first
25#endif
26
27#include <freetds/pushvis.h>
28
30 typedef struct tds_input_stream {
35 int (*read)(struct tds_input_stream *stream, void *ptr, size_t len);
36} TDSINSTREAM;
37
39 typedef struct tds_output_stream {
41 int (*write)(struct tds_output_stream *stream, size_t len);
50 char *buffer;
51 size_t buf_len;
52} TDSOUTSTREAM;
53
55TDSRET tds_convert_stream(TDSSOCKET * tds, TDSICONV * char_conv, TDS_ICONV_DIRECTION direction,
56 TDSINSTREAM * istream, TDSOUTSTREAM *ostream);
58TDSRET tds_copy_stream(TDSINSTREAM * istream, TDSOUTSTREAM * ostream);
59
60/* Additional streams */
61
63 typedef struct tds_datain_stream {
64 TDSINSTREAM stream;
65 size_t wire_size;
66 TDSSOCKET *tds;
67} TDSDATAINSTREAM;
68
69 void tds_datain_stream_init(TDSDATAINSTREAM * stream, TDSSOCKET * tds, size_t wire_size);
70
72 typedef struct tds_dataout_stream {
73 TDSOUTSTREAM stream;
74 TDSSOCKET *tds;
75 size_t written;
76} TDSDATAOUTSTREAM;
77
78 void tds_dataout_stream_init(TDSDATAOUTSTREAM * stream, TDSSOCKET * tds);
79
81 typedef struct tds_staticin_stream {
82 TDSINSTREAM stream;
83 const char *buffer;
84 size_t buf_left;
85} TDSSTATICINSTREAM;
86
87 void tds_staticin_stream_init(TDSSTATICINSTREAM * stream, const void *ptr, size_t len);
88
92 typedef struct tds_staticout_stream {
93 TDSOUTSTREAM stream;
94} TDSSTATICOUTSTREAM;
95
96 void tds_staticout_stream_init(TDSSTATICOUTSTREAM * stream, void *ptr, size_t len);
97
99 typedef struct tds_dynamic_stream {
100 TDSOUTSTREAM stream;
102 void **buf;
104 size_t allocated;
106 size_t size;
107} TDSDYNAMICSTREAM;
108
109TDSRET tds_dynamic_stream_init(TDSDYNAMICSTREAM * stream, void **ptr, size_t allocated);
110
111#include <freetds/popvis.h>
112
113#endif
114
tds_input_stream
define a stream of data used for input
Definition stream.h:30
tds_input_stream::read
int(* read)(struct tds_input_stream *stream, void *ptr, size_t len)
read some data Return 0 if end of stream Return <0 if error (actually not defined)
Definition stream.h:35
tds_output_stream
define a stream of data used for output
Definition stream.h:39
tds_output_stream::buffer
char * buffer
write buffer.
Definition stream.h:50
tds_output_stream::write
int(* write)(struct tds_output_stream *stream, size_t len)
write len bytes from buffer, return <0 if error or len
Definition stream.h:41
tds_datain_stream
input stream to read data from tds protocol
Definition stream.h:63
tds_datain_stream::wire_size
size_t wire_size
bytes still to read
Definition stream.h:65
tds_dataout_stream
output stream to write data to tds protocol
Definition stream.h:72
tds_staticin_stream
input stream to read data from a static buffer
Definition stream.h:81
tds_staticout_stream
output stream to write data to a static buffer.
Definition stream.h:92
tds_dynamic_stream
output stream to write data to a dynamic buffer
Definition stream.h:99
tds_dynamic_stream::buf
void ** buf
where is stored the pointer
Definition stream.h:102
tds_dynamic_stream::size
size_t size
size of data inside buffer
Definition stream.h:106
tds_dynamic_stream::allocated
size_t allocated
currently allocated buffer
Definition stream.h:104
tds_dynamic_stream_init
TDSRET tds_dynamic_stream_init(TDSDYNAMICSTREAM *stream, void **ptr, size_t allocated)
Initialize a dynamic output stream.
Definition stream.c:354
tds_copy_stream
TDSRET tds_copy_stream(TDSINSTREAM *istream, TDSOUTSTREAM *ostream)
Reads and writes from a stream to another.
Definition stream.c:163
tds_convert_stream
TDSRET tds_convert_stream(TDSSOCKET *tds, TDSICONV *char_conv, TDS_ICONV_DIRECTION direction, TDSINSTREAM *istream, TDSOUTSTREAM *ostream)
Reads and writes from a stream converting characters.
Definition stream.c:71
tds_staticout_stream_init
void tds_staticout_stream_init(TDSSTATICOUTSTREAM *stream, void *ptr, size_t len)
Initialize an output stream for write into a static allocated buffer.
Definition stream.c:313
tds_dataout_stream_init
void tds_dataout_stream_init(TDSDATAOUTSTREAM *stream, TDSSOCKET *tds)
Initialize a data output stream.
Definition stream.c:244
tds_staticin_stream_init
void tds_staticin_stream_init(TDSSTATICINSTREAM *stream, const void *ptr, size_t len)
Initialize an input stream for read from a static allocated buffer.
Definition stream.c:286
tds_datain_stream_init
void tds_datain_stream_init(TDSDATAINSTREAM *stream, TDSSOCKET *tds, size_t wire_size)
Initialize a data input stream.
Definition stream.c:204