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1 | /* -*-c-*- |
2 | * |
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3 | * Byte strings |
4 | * |
5 | * (c) 2004 Straylight/Edgeware |
6 | */ |
7 | |
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8 | /*----- Licensing notice --------------------------------------------------* |
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9 | * |
10 | * This file is part of the Python interface to Catacomb. |
11 | * |
12 | * Catacomb/Python is free software; you can redistribute it and/or modify |
13 | * it under the terms of the GNU General Public License as published by |
14 | * the Free Software Foundation; either version 2 of the License, or |
15 | * (at your option) any later version. |
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16 | * |
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17 | * Catacomb/Python is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU General Public License for more details. |
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21 | * |
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22 | * You should have received a copy of the GNU General Public License |
23 | * along with Catacomb/Python; if not, write to the Free Software Foundation, |
24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
25 | */ |
26 | |
27 | /*----- Header files ------------------------------------------------------*/ |
28 | |
29 | #include "catacomb-python.h" |
30 | |
31 | /*----- Main code ---------------------------------------------------------*/ |
32 | |
33 | PyTypeObject *bytestring_pytype; |
34 | |
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35 | static PyObject *dowrap(PyTypeObject *ty, const void *p, size_t n) |
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36 | { |
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37 | PyStringObject *x = (PyStringObject *)ty->tp_alloc(ty, n); |
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38 | if (p) memcpy(x->ob_sval, p, n); |
39 | x->ob_sval[n] = 0; |
40 | #ifdef CACHE_HASH |
41 | x->ob_shash = -1; |
42 | #endif |
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43 | x->ob_sstate = SSTATE_NOT_INTERNED; |
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44 | return ((PyObject *)x); |
45 | } |
46 | |
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47 | PyObject *bytestring_pywrap(const void *p, size_t n) |
48 | { return (dowrap(bytestring_pytype, p, n)); } |
49 | |
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50 | PyObject *bytestring_pywrapbuf(buf *b) |
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51 | { return (dowrap(bytestring_pytype, BCUR(b), BLEFT(b))); } |
52 | |
53 | static PyObject *bytestring_pynew(PyTypeObject *ty, |
54 | PyObject *arg, PyObject *kw) |
55 | { |
56 | const char *p; |
57 | int n; |
58 | static char *kwlist[] = { "data", 0 }; |
59 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", kwlist, &p, &n)) |
60 | return (0); |
61 | return (dowrap(ty, p, n)); |
62 | } |
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63 | |
64 | #define BINOP(name, op) \ |
65 | static PyObject *bytestring_py##name(PyObject *x, PyObject *y) { \ |
66 | const void *xv, *yv; \ |
67 | const unsigned char *xp, *yp; \ |
68 | unsigned char *zp; \ |
69 | int xsz, ysz; \ |
70 | int i; \ |
71 | PyObject *rc = 0; \ |
72 | if (PyObject_AsReadBuffer(x, &xv, &xsz) || \ |
73 | PyObject_AsReadBuffer(y, &yv, &ysz)) \ |
74 | goto end; \ |
75 | if (xsz != ysz) VALERR("length mismatch"); \ |
76 | rc = bytestring_pywrap(0, xsz); \ |
77 | xp = xv; yp = yv; zp = (unsigned char *)PyString_AS_STRING(rc); \ |
78 | for (i = xsz; i > 0; i--) *zp++ = *xp++ op *yp++; \ |
79 | end: \ |
80 | return (rc); \ |
81 | } |
82 | BINOP(and, &) |
83 | BINOP(or, |) |
84 | BINOP(xor, ^) |
85 | |
86 | #define UNOP(name, op) \ |
87 | static PyObject *bytestring_py##name(PyObject *x) { \ |
88 | const void *xv; \ |
89 | const unsigned char *xp; \ |
90 | unsigned char *zp; \ |
91 | int xsz; \ |
92 | int i; \ |
93 | PyObject *rc = 0; \ |
94 | if (PyObject_AsReadBuffer(x, &xv, &xsz)) goto end; \ |
95 | rc = bytestring_pywrap(0, xsz); \ |
96 | xp = xv; zp = (unsigned char *)PyString_AS_STRING(rc); \ |
97 | for (i = xsz; i > 0; i--) *zp++ = op *xp++; \ |
98 | end: \ |
99 | return (rc); \ |
100 | } |
101 | UNOP(not, ~) |
102 | |
103 | static PyNumberMethods bytestring_pynumber = { |
104 | 0, /* @nb_add@ */ |
105 | 0, /* @nb_subtract@ */ |
106 | 0, /* @nb_multiply@ */ |
107 | 0, /* @nb_divide@ */ |
108 | 0, /* @nb_remainder@ */ |
109 | 0, /* @nb_divmod@ */ |
110 | 0, /* @nb_power@ */ |
111 | 0, /* @nb_negative@ */ |
112 | 0, /* @nb_positive@ */ |
113 | 0, /* @nb_absolute@ */ |
114 | 0, /* @nb_nonzero@ */ |
115 | bytestring_pynot, /* @nb_invert@ */ |
116 | 0, /* @nb_lshift@ */ |
117 | 0, /* @nb_rshift@ */ |
118 | bytestring_pyand, /* @nb_and@ */ |
119 | bytestring_pyxor, /* @nb_xor@ */ |
120 | bytestring_pyor, /* @nb_or@ */ |
121 | 0, /* @nb_coerce@ */ |
122 | 0, /* @nb_int@ */ |
123 | 0, /* @nb_long@ */ |
124 | 0, /* @nb_float@ */ |
125 | 0, /* @nb_oct@ */ |
126 | 0, /* @nb_hex@ */ |
127 | }; |
128 | |
129 | static PyBufferProcs bytestring_pybuffer; |
130 | |
131 | static PyTypeObject bytestring_pytype_skel = { |
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132 | PyObject_HEAD_INIT(0) 0, /* Header */ |
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133 | "ByteString", /* @tp_name@ */ |
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134 | 0, /* @tp_basicsize@ */ |
135 | 0, /* @tp_itemsize@ */ |
136 | |
137 | 0, /* @tp_dealloc@ */ |
138 | 0, /* @tp_print@ */ |
139 | 0, /* @tp_getattr@ */ |
140 | 0, /* @tp_setattr@ */ |
141 | 0, /* @tp_compare@ */ |
142 | 0, /* @tp_repr@ */ |
143 | &bytestring_pynumber, /* @tp_as_number@ */ |
144 | 0, /* @tp_as_sequence@ */ |
145 | 0, /* @tp_as_mapping@ */ |
146 | 0, /* @tp_hash@ */ |
147 | 0, /* @tp_call@ */ |
148 | 0, /* @tp_str@ */ |
149 | 0, /* @tp_getattro@ */ |
150 | 0, /* @tp_setattro@ */ |
151 | &bytestring_pybuffer, /* @tp_as_buffer@ */ |
152 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
153 | Py_TPFLAGS_CHECKTYPES | |
154 | Py_TPFLAGS_BASETYPE, |
155 | |
156 | /* @tp_doc@ */ |
157 | "Byte string class.", |
158 | |
159 | 0, /* @tp_traverse@ */ |
160 | 0, /* @tp_clear@ */ |
161 | 0, /* @tp_richcompare@ */ |
162 | 0, /* @tp_weaklistoffset@ */ |
163 | 0, /* @tp_iter@ */ |
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164 | 0, /* @tp_iternext@ */ |
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165 | 0, /* @tp_methods@ */ |
166 | 0, /* @tp_members@ */ |
167 | 0, /* @tp_getset@ */ |
168 | 0, /* @tp_base@ */ |
169 | 0, /* @tp_dict@ */ |
170 | 0, /* @tp_descr_get@ */ |
171 | 0, /* @tp_descr_set@ */ |
172 | 0, /* @tp_dictoffset@ */ |
173 | 0, /* @tp_init@ */ |
174 | PyType_GenericAlloc, /* @tp_alloc@ */ |
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175 | bytestring_pynew, /* @tp_new@ */ |
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176 | 0, /* @tp_free@ */ |
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177 | 0 /* @tp_is_gc@ */ |
178 | }; |
179 | |
180 | /*----- Initialization ----------------------------------------------------*/ |
181 | |
182 | #define string_pytype &PyString_Type |
183 | void bytestring_pyinit(void) |
184 | { |
185 | INITTYPE(bytestring, string); |
186 | } |
187 | |
188 | void bytestring_pyinsert(PyObject *mod) |
189 | { |
190 | INSERT("ByteString", bytestring_pytype); |
191 | } |
192 | |
193 | /*----- That's all, folks -------------------------------------------------*/ |