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1 | /* -*-c-*- |
2 | * |
3 | * $Id$ |
4 | * |
5 | * Byte strings |
6 | * |
7 | * (c) 2004 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of the Python interface to Catacomb. |
13 | * |
14 | * Catacomb/Python is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU General Public License as published by |
16 | * the Free Software Foundation; either version 2 of the License, or |
17 | * (at your option) any later version. |
18 | * |
19 | * Catacomb/Python is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU General Public License |
25 | * along with Catacomb/Python; if not, write to the Free Software Foundation, |
26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
27 | */ |
28 | |
29 | /*----- Header files ------------------------------------------------------*/ |
30 | |
31 | #include "catacomb-python.h" |
32 | |
33 | /*----- Main code ---------------------------------------------------------*/ |
34 | |
35 | PyTypeObject *bytestring_pytype; |
36 | |
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37 | static PyObject *dowrap(PyTypeObject *ty, const void *p, size_t n) |
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38 | { |
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39 | PyStringObject *x = (PyStringObject *)ty->tp_alloc(ty, n); |
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40 | if (p) memcpy(x->ob_sval, p, n); |
41 | x->ob_sval[n] = 0; |
42 | #ifdef CACHE_HASH |
43 | x->ob_shash = -1; |
44 | #endif |
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45 | x->ob_sstate = SSTATE_NOT_INTERNED; |
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46 | return ((PyObject *)x); |
47 | } |
48 | |
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49 | PyObject *bytestring_pywrap(const void *p, size_t n) |
50 | { return (dowrap(bytestring_pytype, p, n)); } |
51 | |
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52 | PyObject *bytestring_pywrapbuf(buf *b) |
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53 | { return (dowrap(bytestring_pytype, BCUR(b), BLEFT(b))); } |
54 | |
55 | static PyObject *bytestring_pynew(PyTypeObject *ty, |
56 | PyObject *arg, PyObject *kw) |
57 | { |
58 | const char *p; |
59 | int n; |
60 | static char *kwlist[] = { "data", 0 }; |
61 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", kwlist, &p, &n)) |
62 | return (0); |
63 | return (dowrap(ty, p, n)); |
64 | } |
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65 | |
66 | #define BINOP(name, op) \ |
67 | static PyObject *bytestring_py##name(PyObject *x, PyObject *y) { \ |
68 | const void *xv, *yv; \ |
69 | const unsigned char *xp, *yp; \ |
70 | unsigned char *zp; \ |
71 | int xsz, ysz; \ |
72 | int i; \ |
73 | PyObject *rc = 0; \ |
74 | if (PyObject_AsReadBuffer(x, &xv, &xsz) || \ |
75 | PyObject_AsReadBuffer(y, &yv, &ysz)) \ |
76 | goto end; \ |
77 | if (xsz != ysz) VALERR("length mismatch"); \ |
78 | rc = bytestring_pywrap(0, xsz); \ |
79 | xp = xv; yp = yv; zp = (unsigned char *)PyString_AS_STRING(rc); \ |
80 | for (i = xsz; i > 0; i--) *zp++ = *xp++ op *yp++; \ |
81 | end: \ |
82 | return (rc); \ |
83 | } |
84 | BINOP(and, &) |
85 | BINOP(or, |) |
86 | BINOP(xor, ^) |
87 | |
88 | #define UNOP(name, op) \ |
89 | static PyObject *bytestring_py##name(PyObject *x) { \ |
90 | const void *xv; \ |
91 | const unsigned char *xp; \ |
92 | unsigned char *zp; \ |
93 | int xsz; \ |
94 | int i; \ |
95 | PyObject *rc = 0; \ |
96 | if (PyObject_AsReadBuffer(x, &xv, &xsz)) goto end; \ |
97 | rc = bytestring_pywrap(0, xsz); \ |
98 | xp = xv; zp = (unsigned char *)PyString_AS_STRING(rc); \ |
99 | for (i = xsz; i > 0; i--) *zp++ = op *xp++; \ |
100 | end: \ |
101 | return (rc); \ |
102 | } |
103 | UNOP(not, ~) |
104 | |
105 | static PyNumberMethods bytestring_pynumber = { |
106 | 0, /* @nb_add@ */ |
107 | 0, /* @nb_subtract@ */ |
108 | 0, /* @nb_multiply@ */ |
109 | 0, /* @nb_divide@ */ |
110 | 0, /* @nb_remainder@ */ |
111 | 0, /* @nb_divmod@ */ |
112 | 0, /* @nb_power@ */ |
113 | 0, /* @nb_negative@ */ |
114 | 0, /* @nb_positive@ */ |
115 | 0, /* @nb_absolute@ */ |
116 | 0, /* @nb_nonzero@ */ |
117 | bytestring_pynot, /* @nb_invert@ */ |
118 | 0, /* @nb_lshift@ */ |
119 | 0, /* @nb_rshift@ */ |
120 | bytestring_pyand, /* @nb_and@ */ |
121 | bytestring_pyxor, /* @nb_xor@ */ |
122 | bytestring_pyor, /* @nb_or@ */ |
123 | 0, /* @nb_coerce@ */ |
124 | 0, /* @nb_int@ */ |
125 | 0, /* @nb_long@ */ |
126 | 0, /* @nb_float@ */ |
127 | 0, /* @nb_oct@ */ |
128 | 0, /* @nb_hex@ */ |
129 | }; |
130 | |
131 | static PyBufferProcs bytestring_pybuffer; |
132 | |
133 | static PyTypeObject bytestring_pytype_skel = { |
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134 | PyObject_HEAD_INIT(0) 0, /* Header */ |
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135 | "catacomb.ByteString", /* @tp_name@ */ |
136 | 0, /* @tp_basicsize@ */ |
137 | 0, /* @tp_itemsize@ */ |
138 | |
139 | 0, /* @tp_dealloc@ */ |
140 | 0, /* @tp_print@ */ |
141 | 0, /* @tp_getattr@ */ |
142 | 0, /* @tp_setattr@ */ |
143 | 0, /* @tp_compare@ */ |
144 | 0, /* @tp_repr@ */ |
145 | &bytestring_pynumber, /* @tp_as_number@ */ |
146 | 0, /* @tp_as_sequence@ */ |
147 | 0, /* @tp_as_mapping@ */ |
148 | 0, /* @tp_hash@ */ |
149 | 0, /* @tp_call@ */ |
150 | 0, /* @tp_str@ */ |
151 | 0, /* @tp_getattro@ */ |
152 | 0, /* @tp_setattro@ */ |
153 | &bytestring_pybuffer, /* @tp_as_buffer@ */ |
154 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
155 | Py_TPFLAGS_CHECKTYPES | |
156 | Py_TPFLAGS_BASETYPE, |
157 | |
158 | /* @tp_doc@ */ |
159 | "Byte string class.", |
160 | |
161 | 0, /* @tp_traverse@ */ |
162 | 0, /* @tp_clear@ */ |
163 | 0, /* @tp_richcompare@ */ |
164 | 0, /* @tp_weaklistoffset@ */ |
165 | 0, /* @tp_iter@ */ |
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166 | 0, /* @tp_iternext@ */ |
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167 | 0, /* @tp_methods@ */ |
168 | 0, /* @tp_members@ */ |
169 | 0, /* @tp_getset@ */ |
170 | 0, /* @tp_base@ */ |
171 | 0, /* @tp_dict@ */ |
172 | 0, /* @tp_descr_get@ */ |
173 | 0, /* @tp_descr_set@ */ |
174 | 0, /* @tp_dictoffset@ */ |
175 | 0, /* @tp_init@ */ |
176 | PyType_GenericAlloc, /* @tp_alloc@ */ |
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177 | bytestring_pynew, /* @tp_new@ */ |
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178 | 0, /* @tp_free@ */ |
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179 | 0 /* @tp_is_gc@ */ |
180 | }; |
181 | |
182 | /*----- Initialization ----------------------------------------------------*/ |
183 | |
184 | #define string_pytype &PyString_Type |
185 | void bytestring_pyinit(void) |
186 | { |
187 | INITTYPE(bytestring, string); |
188 | } |
189 | |
190 | void bytestring_pyinsert(PyObject *mod) |
191 | { |
192 | INSERT("ByteString", bytestring_pytype); |
193 | } |
194 | |
195 | /*----- That's all, folks -------------------------------------------------*/ |