1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
|
%% options
copyright owner = Dirk Krause
copyright year = 2015-xxxx
license = bsd
%% header
/** @file
Generic dk4_stream_t API for input
from Windows file handle.
*/
#ifndef DK4CONF_H_INCLUDED
#include "dk4conf.h"
#endif
#if DK4_ON_WINDOWS
#ifndef DK4TYPES_H_INCLUDED
#include "dk4types.h"
#endif
#ifndef WINDOWS_H_INCLUDED
#include <windows.h>
#define WINDOWS_H_INCLUDED 1
#endif
#ifndef DK4ERROR_H_INCLUDED
#include "dk4error.h"
#endif
#ifndef DK4STRM_H_INCLUDED
#include "dk4strm.h"
#endif
#ifndef STDIO_H_INCLUDED
#include <stdio.h>
#define STDIO_H_INCLUDED 1
#endif
/** Structure for keeping a HANDLE.
*/
typedef struct {
HANDLE ha; /**< Windows file handle. */
int feof; /**< Flag: Found EOF while reading. */
} dk4_stream_handle_t;
#ifdef __cplusplus
extern "C" {
#endif
/** Low level function to access a Windows handle.
@param api The stream API structure for arguments and results.
*/
void
dk4stream_windows_handle_function(dk4_stream_api_t *api);
/** Low level function to access a Windows handle and close it on
dk4stream_close().
@param api The stream API structure for arguments and results.
*/
void
dk4stream_windows_handle_with_close_function(dk4_stream_api_t *api);
/** Open a stream for an existing handle.
@param ha Existing file handle, not closed on dk4stream_close().
@param fl Access flag: DK4_STREAM_READ,, DK4_STREAM_WRITE
or (DK4_STREAM_READ | DK4_STREAM_WRITE).
@param ibs Input buffer size (0 for default).
@param obs Output buffer size (0 for default).
@param erp Error report, may be NULL.
@return Pointer to new stream on success, NULL on error.
*/
dk4_stream_t *
dk4stream_open_for_windows_handle(
HANDLE ha,
int fl,
size_t ibs,
size_t obs,
dk4_er_t *erp
);
/** Open a stream for an existing handle.
@param ha Existing file handle, closed on dk4stream_close().
@param fl Access flag: DK4_STREAM_READ,, DK4_STREAM_WRITE
or (DK4_STREAM_READ | DK4_STREAM_WRITE).
@param ibs Input buffer size (0 for default).
@param obs Output buffer size (0 for default).
@param erp Error report, may be NULL.
@return Pointer to new stream on success, NULL on error.
*/
dk4_stream_t *
dk4stream_open_for_windows_handle_with_close(
HANDLE ha,
int fl,
size_t ibs,
size_t obs,
dk4_er_t *erp
);
#ifdef __cplusplus
}
#endif
#endif
%% module
#include "dk4conf.h"
#if DK4_ON_WINDOWS
#include "dk4strmh.h"
#ifndef DK4MEM_H_INCLUDED
#include "dk4mem.h"
#endif
/** Low level function to access a Windows handle.
@param api The stream API structure for arguments and results.
@param wc Flag: Close handle when closing the stream.
*/
static
void
dk4stream_windows_handle_static_function(dk4_stream_api_t *api, int wc)
{
dk4_stream_handle_t *sh;
DWORD dwi;
DWORD dwo;
if (NULL != api) {
api->res = 0;
api->sz_out = 0;
sh = (dk4_stream_handle_t *)(api->d);
if (NULL != sh) {
switch (api->cmd) {
case DK4_STREAM_API_READ : {
if (0 == sh->feof) {
if ((dk4_um_t)0xFFFFFFFFUL < (dk4_um_t)(api->sz_in)) {
dwi = 0xFFFFFFFFUL;
} else {
dwi = (DWORD)(api->sz_in);
}
dwo = (DWORD)0UL;
if (ReadFile(sh->ha, api->b, dwi, &dwo, NULL)) {
if ((DWORD)0UL == dwo) { sh->feof = 1; }
api->sz_out = (size_t)dwo;
if ((DWORD)0UL < dwo) {
api->res = 1;
}
}
}
} break;
case DK4_STREAM_API_WRITE : {
if ((dk4_um_t)0xFFFFFFFFUL >= (dk4_um_t)(api->sz_in)) {
dwi = (DWORD)(api->sz_in);
dwo = (DWORD)0UL;
if (WriteFile(sh->ha, api->b, dwi, &dwo, NULL)) {
api->sz_out = dwo;
if (dwo == dwi) {
api->res = 1;
}
}
} else {
/* ERROR: Size too large */
}
} break;
case DK4_STREAM_API_FLUSH : {
api->res = 1; /* Dont know how to flush */
} break;
case DK4_STREAM_API_AT_END : {
if (0 != sh->feof) {
api->res = 1;
}
} break;
case DK4_STREAM_API_CLOSE : {
if (0 != wc) {
if (CloseHandle(sh->ha)) {
api->res = 1;
}
} else {
api->res = 1;
}
dk4mem_free(sh);
} break;
}
}
}
}
void
dk4stream_windows_handle_with_close_function(dk4_stream_api_t *api)
{
dk4stream_windows_handle_static_function(api, 1);
}
void
dk4stream_windows_handle_function(dk4_stream_api_t *api)
{
dk4stream_windows_handle_static_function(api, 0);
}
dk4_stream_t *
dk4stream_open_for_windows_handle(
HANDLE ha,
int fl,
size_t ibs,
size_t obs,
dk4_er_t *erp
)
{
dk4_stream_handle_t *sh = NULL;
dk4_stream_t *back = NULL;
sh = dk4mem_new(dk4_stream_handle_t,1,erp);
if (NULL != sh) {
sh->ha = ha;
sh->feof = 0;
back = dk4stream_open(
(void *)sh, dk4stream_windows_handle_function, fl, ibs, obs, erp
);
if (NULL == back) {
dk4mem_free(sh);
}
}
return back;
}
dk4_stream_t *
dk4stream_open_for_windows_handle_with_close(
HANDLE ha,
int fl,
size_t ibs,
size_t obs,
dk4_er_t *erp
)
{
dk4_stream_handle_t *sh = NULL;
dk4_stream_t *back = NULL;
sh = dk4mem_new(dk4_stream_handle_t,1,erp);
if (NULL != sh) {
sh->ha = ha;
sh->feof = 0;
back = dk4stream_open(
(void *)sh, dk4stream_windows_handle_with_close_function,
fl, ibs, obs, erp
);
if (NULL == back) {
dk4mem_free(sh);
}
}
return back;
}
#endif
/* if DK4_ON_WINDOWS */
|
