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1 | /* | |
2 | * This file is part of the libsigrokdecode project. | |
3 | * | |
4 | * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.com> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include "libsigrokdecode-internal.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */ | |
22 | #include "libsigrokdecode.h" | |
23 | #include "config.h" | |
24 | ||
25 | /** | |
26 | * Get the value of a Python object's attribute, returned as a newly | |
27 | * allocated char *. | |
28 | * | |
29 | * @param py_obj The object to probe. | |
30 | * @param attr Name of the attribute to retrieve. | |
31 | * @param outstr ptr to char * storage to be filled in. | |
32 | * | |
33 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
34 | * The 'outstr' argument points to a malloc()ed string upon success. | |
35 | * | |
36 | * @private | |
37 | */ | |
38 | SRD_PRIV int py_attr_as_str(const PyObject *py_obj, const char *attr, | |
39 | char **outstr) | |
40 | { | |
41 | PyObject *py_str; | |
42 | int ret; | |
43 | ||
44 | if (!PyObject_HasAttrString((PyObject *)py_obj, attr)) { | |
45 | srd_dbg("%s object has no attribute '%s'.", | |
46 | Py_TYPE(py_obj)->tp_name, attr); | |
47 | return SRD_ERR_PYTHON; | |
48 | } | |
49 | ||
50 | if (!(py_str = PyObject_GetAttrString((PyObject *)py_obj, attr))) { | |
51 | srd_exception_catch(""); | |
52 | return SRD_ERR_PYTHON; | |
53 | } | |
54 | ||
55 | if (!PyUnicode_Check(py_str)) { | |
56 | srd_dbg("%s attribute should be a string, but is a %s.", | |
57 | attr, Py_TYPE(py_str)->tp_name); | |
58 | Py_DecRef(py_str); | |
59 | return SRD_ERR_PYTHON; | |
60 | } | |
61 | ||
62 | ret = py_str_as_str(py_str, outstr); | |
63 | Py_DecRef(py_str); | |
64 | ||
65 | return ret; | |
66 | } | |
67 | ||
68 | /** | |
69 | * Get the value of a Python dictionary item, returned as a newly | |
70 | * allocated char *. | |
71 | * | |
72 | * @param py_obj The dictionary to probe. | |
73 | * @param key Key of the item to retrieve. | |
74 | * @param outstr Pointer to char * storage to be filled in. | |
75 | * | |
76 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
77 | * The 'outstr' argument points to a malloc()ed string upon success. | |
78 | * | |
79 | * @private | |
80 | */ | |
81 | SRD_PRIV int py_dictitem_as_str(const PyObject *py_obj, const char *key, | |
82 | char **outstr) | |
83 | { | |
84 | PyObject *py_value; | |
85 | int ret; | |
86 | ||
87 | if (!PyDict_Check((PyObject *)py_obj)) { | |
88 | srd_dbg("Object is a %s, not a dictionary.", | |
89 | Py_TYPE((PyObject *)py_obj)->tp_name); | |
90 | return SRD_ERR_PYTHON; | |
91 | } | |
92 | ||
93 | if (!(py_value = PyDict_GetItemString((PyObject *)py_obj, key))) { | |
94 | srd_dbg("Dictionary has no attribute '%s'.", key); | |
95 | return SRD_ERR_PYTHON; | |
96 | } | |
97 | ||
98 | if (!PyUnicode_Check(py_value)) { | |
99 | srd_dbg("Dictionary value for %s should be a string, but is " | |
100 | "a %s.", key, Py_TYPE(py_value)->tp_name); | |
101 | return SRD_ERR_PYTHON; | |
102 | } | |
103 | ||
104 | ret = py_str_as_str(py_value, outstr); | |
105 | ||
106 | return ret; | |
107 | } | |
108 | ||
109 | /** | |
110 | * Get the value of a Python unicode string object, returned as a newly | |
111 | * allocated char *. | |
112 | * | |
113 | * @param py_str The unicode string object. | |
114 | * @param outstr ptr to char * storage to be filled in. | |
115 | * | |
116 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
117 | * The 'outstr' argument points to a malloc()ed string upon success. | |
118 | * | |
119 | * @private | |
120 | */ | |
121 | SRD_PRIV int py_str_as_str(const PyObject *py_str, char **outstr) | |
122 | { | |
123 | PyObject *py_encstr; | |
124 | int ret; | |
125 | char *str; | |
126 | ||
127 | py_encstr = NULL; | |
128 | str = NULL; | |
129 | ret = SRD_OK; | |
130 | ||
131 | if (!PyUnicode_Check((PyObject *)py_str)) { | |
132 | srd_dbg("Object is a %s, not a string object.", | |
133 | Py_TYPE((PyObject *)py_str)->tp_name); | |
134 | ret = SRD_ERR_PYTHON; | |
135 | goto err_out; | |
136 | } | |
137 | ||
138 | if (!(py_encstr = PyUnicode_AsEncodedString((PyObject *)py_str, | |
139 | "utf-8", NULL))) { | |
140 | ret = SRD_ERR_PYTHON; | |
141 | goto err_out; | |
142 | } | |
143 | if (!(str = PyBytes_AS_STRING(py_encstr))) { | |
144 | ret = SRD_ERR_PYTHON; | |
145 | goto err_out; | |
146 | } | |
147 | ||
148 | if (!(*outstr = g_strdup(str))) { | |
149 | srd_dbg("Failed to g_malloc() outstr."); | |
150 | ret = SRD_ERR_MALLOC; | |
151 | goto err_out; | |
152 | } | |
153 | ||
154 | err_out: | |
155 | if (py_encstr) | |
156 | Py_XDECREF(py_encstr); | |
157 | ||
158 | if (PyErr_Occurred()) { | |
159 | srd_exception_catch("string conversion failed"); | |
160 | } | |
161 | ||
162 | return ret; | |
163 | } | |
164 | ||
165 | /** | |
166 | * Convert a Python list of unicode strings to a NULL-terminated UTF8-encoded | |
167 | * char * array. The caller must g_free() each string when finished. | |
168 | * | |
169 | * @param py_strlist The list object. | |
170 | * @param outstr ptr to char ** storage to be filled in. | |
171 | * | |
172 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
173 | * The 'outstr' argument points to a g_malloc()ed char** upon success. | |
174 | * | |
175 | * @private | |
176 | */ | |
177 | SRD_PRIV int py_strseq_to_char(const PyObject *py_strseq, char ***outstr) | |
178 | { | |
179 | PyObject *py_str; | |
180 | int list_len, i; | |
181 | char **out, *str; | |
182 | ||
183 | list_len = PySequence_Size((PyObject *)py_strseq); | |
184 | if (!(out = g_try_malloc(sizeof(char *) * (list_len + 1)))) { | |
185 | srd_err("Failed to g_malloc() 'out'."); | |
186 | return SRD_ERR_MALLOC; | |
187 | } | |
188 | for (i = 0; i < list_len; i++) { | |
189 | if (!(py_str = PyUnicode_AsEncodedString( | |
190 | PySequence_GetItem((PyObject *)py_strseq, i), "utf-8", NULL))) | |
191 | return SRD_ERR_PYTHON; | |
192 | if (!(str = PyBytes_AS_STRING(py_str))) | |
193 | return SRD_ERR_PYTHON; | |
194 | out[i] = g_strdup(str); | |
195 | } | |
196 | out[i] = NULL; | |
197 | *outstr = out; | |
198 | ||
199 | return SRD_OK; | |
200 | } |