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
|
/*
* This file is part of the sigrok project.
*
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <sigrokdecode.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */
#include <stdio.h>
/**
* Initialize libsigrokdecode.
*
* @return 0 upon success, non-zero otherwise.
*/
int sigrokdecode_init(void)
{
/* Py_Initialize() returns void and usually cannot fail. */
Py_Initialize();
/* Add some more search directories for convenience. */
/* FIXME: Check error code. */
PyRun_SimpleString(
"import sys;"
"sys.path.append('libsigrokdecode/scripts');"
"sys.path.append('../libsigrokdecode/scripts');"
"sys.path.append('/usr/local/share/sigrok');"
);
return 0;
}
/**
* TODO
*
* @param name TODO
* @return 0 upon success, non-zero otherwise.
*/
int sigrokdecode_load_decoder_file(const char *name)
{
/* QUICK HACK */
name = name;
/* TODO */
return 0;
}
/**
* Run the specified decoder function.
*
* @param decodername TODO
* @param inbuf TODO
* @param inbuflen TODO
* @param outbuf TODO
* @param outbuflen TODO
* @return 0 upon success, non-zero otherwise.
*/
int sigrokdecode_run_decoder(const char *decodername, uint8_t *inbuf,
uint64_t inbuflen, uint8_t **outbuf,
uint64_t *outbuflen)
{
const char *decoder_filename = "transitioncounter"; /* FIXME */
// const char *decoder_filename = "i2c"; /* FIXME */
PyObject *py_name, *py_module, *py_func, *py_args;
PyObject *py_value, *py_result;
int ret;
/* TODO: Use #defines for the return codes. */
/* Return an error upon unusable input. */
if (decodername == NULL)
return -1;
if (inbuf == NULL)
return -2;
if (inbuflen == 0) /* No point in working on empty buffers. */
return -3;
if (outbuf == NULL)
return -4;
if (outbuflen == NULL)
return -5;
/* Get the name of the decoder module/file as Python string. */
if (!(py_name = PyString_FromString(decoder_filename))) {
PyErr_Print();
return -6;
}
/* "Import" the python file/module. */
if (!(py_module = PyImport_Import(py_name))) {
PyErr_Print();
Py_DECREF(py_name);
return -7;
}
Py_DECREF(py_name);
/* Get the decoder/function name as Python callable object. */
py_func = PyObject_GetAttrString(py_module, decodername);
if (!py_func || !PyCallable_Check(py_func)) {
if (PyErr_Occurred())
PyErr_Print();
Py_DECREF(py_module);
return -8;
}
/* Create a Python tuple of size 1. */
if (!(py_args = PyTuple_New(1))) {
PyErr_Print();
Py_DECREF(py_func);
Py_DECREF(py_module);
return -9;
}
/* Get the input buffer as Python "string" (byte array). */
/* TODO: int vs. uint64_t for 'inbuflen'? */
if (!(py_value = Py_BuildValue("s#", inbuf, inbuflen))) {
PyErr_Print();
Py_DECREF(py_args);
Py_DECREF(py_func);
Py_DECREF(py_module);
return -10;
}
if (PyTuple_SetItem(py_args, 0, py_value) != 0) {
PyErr_Print();
Py_DECREF(py_value);
Py_DECREF(py_args);
Py_DECREF(py_func);
Py_DECREF(py_module);
return -11;
}
if (!(py_result = PyObject_CallObject(py_func, py_args))) {
PyErr_Print();
Py_DECREF(py_value);
Py_DECREF(py_args);
Py_DECREF(py_func);
Py_DECREF(py_module);
return -12;
}
if ((ret = PyObject_AsCharBuffer(py_result, (const char **)outbuf,
(Py_ssize_t *)outbuflen))) {
PyErr_Print();
Py_DECREF(py_result);
Py_DECREF(py_value);
Py_DECREF(py_args);
Py_DECREF(py_func);
Py_DECREF(py_module);
return -13;
}
Py_DECREF(py_result);
// Py_DECREF(py_value);
Py_DECREF(py_args);
Py_DECREF(py_func);
Py_DECREF(py_module);
return 0;
}
/**
* Shutdown libsigrokdecode.
*
* @return 0 upon success, non-zero otherwise.
*/
int sigrokdecode_shutdown(void)
{
/* Py_Finalize() returns void, any finalization errors are ignored. */
Py_Finalize();
return 0;
}
|
