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1c6fa20f UH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <sigrokdecode.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */ | |
22 | #include <stdio.h> | |
23 | ||
24 | /** | |
25 | * Initialize libsigrokdecode. | |
26 | * | |
27 | * @return 0 upon success, non-zero otherwise. | |
28 | */ | |
29 | int sigrokdecode_init(void) | |
30 | { | |
31 | /* Py_Initialize() returns void and usually cannot fail. */ | |
32 | Py_Initialize(); | |
33 | ||
34 | /* FIXME */ | |
3a72d2b3 | 35 | /* Allows for ./gui/sigrok-gui in the top-level directory. */ |
3aca097f | 36 | PySys_SetPath("libsigrokdecode/scripts"); |
3a72d2b3 UH |
37 | /* Allows for ./sigrok-gui in the gui/ directory. */ |
38 | PySys_SetPath("../libsigrokdecode/scripts"); | |
39 | /* Allows for sigrok-gui from anywhere given sigrok is installed. */ | |
40 | PySys_SetPath("/usr/local/share/sigrok"); | |
1c6fa20f UH |
41 | |
42 | return 0; | |
43 | } | |
44 | ||
45 | /** | |
46 | * TODO | |
47 | * | |
48 | * @param name TODO | |
49 | * @return 0 upon success, non-zero otherwise. | |
50 | */ | |
51 | int sigrokdecode_load_decoder_file(const char *name) | |
52 | { | |
53 | /* TODO */ | |
54 | return 0; | |
55 | } | |
56 | ||
57 | /** | |
58 | * Run the specified decoder function. | |
59 | * | |
60 | * @param decodername TODO | |
61 | * @param inbuf TODO | |
62 | * @param inbuflen TODO | |
63 | * @param outbuf TODO | |
64 | * @param outbuflen TODO | |
65 | * @return 0 upon success, non-zero otherwise. | |
66 | */ | |
67 | int sigrokdecode_run_decoder(const char *decodername, uint8_t *inbuf, | |
68 | uint64_t inbuflen, uint8_t **outbuf, | |
69 | uint64_t *outbuflen) | |
70 | { | |
71 | const char *decoder_filename = "transitioncounter"; /* FIXME */ | |
72 | PyObject *py_name, *py_module, *py_func, *py_args; | |
73 | PyObject *py_value, *py_result; | |
74 | int ret; | |
75 | ||
76 | /* TODO: Use #defines for the return codes. */ | |
77 | ||
78 | /* Return an error upon unusable input. */ | |
79 | if (decodername == NULL) | |
80 | return -1; | |
81 | if (inbuf == NULL) | |
82 | return -2; | |
83 | if (inbuflen == 0) /* No point in working on empty buffers. */ | |
84 | return -3; | |
85 | if (outbuf == NULL) | |
86 | return -4; | |
87 | if (outbuflen == NULL) | |
88 | return -5; | |
89 | ||
90 | /* Get the name of the decoder module/file as Python string. */ | |
91 | if (!(py_name = PyString_FromString(decoder_filename))) { | |
92 | PyErr_Print(); | |
93 | return -6; | |
94 | } | |
95 | ||
96 | /* "Import" the python file/module. */ | |
97 | if (!(py_module = PyImport_Import(py_name))) { | |
98 | PyErr_Print(); | |
99 | Py_DECREF(py_name); | |
100 | return -7; | |
101 | } | |
102 | Py_DECREF(py_name); | |
103 | ||
104 | /* Get the decoder/function name as Python callable object. */ | |
105 | py_func = PyObject_GetAttrString(py_module, decodername); | |
106 | if (!py_func || !PyCallable_Check(py_func)) { | |
107 | if (PyErr_Occurred()) | |
108 | PyErr_Print(); | |
109 | Py_DECREF(py_module); | |
110 | return -8; | |
111 | } | |
112 | ||
113 | /* Create a Python tuple of size 1. */ | |
114 | if (!(py_args = PyTuple_New(1))) { | |
115 | PyErr_Print(); | |
116 | Py_DECREF(py_func); | |
117 | Py_DECREF(py_module); | |
118 | return -9; | |
119 | } | |
120 | ||
121 | /* Get the input buffer as Python "string" (byte array). */ | |
122 | /* TODO: int vs. uint64_t for 'inbuflen'? */ | |
123 | if (!(py_value = Py_BuildValue("s#", inbuf, inbuflen))) { | |
124 | PyErr_Print(); | |
125 | Py_DECREF(py_args); | |
126 | Py_DECREF(py_func); | |
127 | Py_DECREF(py_module); | |
128 | return -10; | |
129 | } | |
130 | ||
131 | if (PyTuple_SetItem(py_args, 0, py_value) != 0) { | |
132 | PyErr_Print(); | |
133 | Py_DECREF(py_value); | |
134 | Py_DECREF(py_args); | |
135 | Py_DECREF(py_func); | |
136 | Py_DECREF(py_module); | |
137 | return -11; | |
138 | } | |
139 | ||
140 | if (!(py_result = PyObject_CallObject(py_func, py_args))) { | |
141 | PyErr_Print(); | |
142 | Py_DECREF(py_value); | |
143 | Py_DECREF(py_args); | |
144 | Py_DECREF(py_func); | |
145 | Py_DECREF(py_module); | |
146 | return -12; | |
147 | } | |
148 | ||
149 | if ((ret = PyObject_AsCharBuffer(py_result, (const char **)outbuf, | |
150 | (Py_ssize_t *)outbuflen))) { | |
151 | PyErr_Print(); | |
152 | Py_DECREF(py_result); | |
153 | Py_DECREF(py_value); | |
154 | Py_DECREF(py_args); | |
155 | Py_DECREF(py_func); | |
156 | Py_DECREF(py_module); | |
157 | return -13; | |
158 | } | |
159 | ||
160 | Py_DECREF(py_result); | |
161 | // Py_DECREF(py_value); | |
162 | Py_DECREF(py_args); | |
163 | Py_DECREF(py_func); | |
164 | Py_DECREF(py_module); | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | /** | |
170 | * Shutdown libsigrokdecode. | |
171 | * | |
172 | * @return 0 upon success, non-zero otherwise. | |
173 | */ | |
174 | int sigrokdecode_shutdown(void) | |
175 | { | |
176 | /* Py_Finalize() returns void, any finalization errors are ignored. */ | |
177 | Py_Finalize(); | |
178 | ||
179 | return 0; | |
180 | } |