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1 package org.python.core;
3
4
5
8
9 public class PyFrame extends PyObject
10 {
11 public PyFrame f_back;
12 public PyTableCode f_code;
13 public PyObject f_locals;
14 public PyObject f_globals;
15 public int f_lineno;
16 public PyObject f_builtins;
17 public PyObject[] f_fastlocals;
18 public PyCell[] f_env; public int f_ncells;
20 public int f_nfreevars;
21 public int f_lasti;
22 public Object  [] f_savedlocals;
23
24 public TraceFunction tracefunc;
26
27 private static final String [] __members__ = {
28 "f_back", "f_code", "f_locals", "f_globals", "f_lineno",
29 "f_builtins", "f_trace"
30 };
31
32 public PyFrame(PyTableCode code, PyObject locals, PyObject globals,
33 PyObject builtins)
34 {
35 f_code = code;
36 f_locals = locals;
37 f_globals = globals;
38 f_builtins = builtins;
39 if (locals == null && code != null) {
41 if ((code.co_flags&PyTableCode.CO_OPTIMIZED)!=0 ||
43 code.nargs > 0) {
44 if (code.co_nlocals > 0) {
45 f_fastlocals = new PyObject[
47 code.co_nlocals-code.jy_npurecell];
48 }
49 } else
50 f_locals = new PyStringMap();
51 }
52 if (code != null) { int env_sz = 0;
54 if (code.co_freevars != null)
55 env_sz += (f_nfreevars = code.co_freevars.length);
56 if (code.co_cellvars != null)
57 env_sz += (f_ncells = code.co_cellvars.length);
58 if (env_sz > 0)
59 f_env = new PyCell[env_sz];
60 }
61 }
62
63 public PyFrame(PyTableCode code, PyObject globals) {
64 this(code, null, globals, null);
65 }
66
67 public String toString() {
68 if (f_code == null) {
69 return "<frame (unknown code) at line "+f_lineno+">";
70 } else {
71 return "<frame in \""+f_code.co_name+"\" at line "+f_lineno+">";
72 }
73 }
74
75 public PyObject __dir__() {
76 PyString members[] = new PyString[__members__.length];
77 for (int i = 0; i < __members__.length; i++)
78 members[i] = new PyString(__members__[i]);
79 return new PyList(members);
80 }
81
82 private void throwReadonly(String name) {
83 for (int i = 0; i < __members__.length; i++)
84 if (__members__[i] == name)
85 throw Py.TypeError("readonly attribute");
86 throw Py.AttributeError(name);
87 }
88
89 public void __setattr__(String name, PyObject value) {
90 if (name == "f_trace")
92 tracefunc = new PythonTraceFunction(value);
93 else throwReadonly(name);
98 }
99
100 public void __delattr__(String name) {
101 if (name == "f_trace")
102 tracefunc = null;
103 else throwReadonly(name);
108 }
109
110 public PyObject __findattr__(String name) {
111 if (name == "f_locals")
112 return getf_locals();
113 else if (name == "f_trace") {
114 if (tracefunc instanceof PythonTraceFunction) {
115 return ((PythonTraceFunction)tracefunc).tracefunc;
116 }
117 return Py.None;
118 }
119 return super.__findattr__(name);
120 }
121
122 public PyObject getf_locals() {
123 if (f_locals == null)
124 f_locals = new PyStringMap();
125 if (f_code!=null && f_code.co_nlocals>0) {
126 int i;
127 if (f_fastlocals != null) {
128 for (i=0; i<f_fastlocals.length; i++) {
129 PyObject o = f_fastlocals[i];
130 if (o != null)
131 f_locals.__setitem__(f_code.co_varnames[i], o);
132 }
133 if ((f_code.co_flags&PyTableCode.CO_OPTIMIZED) == 0)
134 f_fastlocals = null;
135 }
136 int j = 0;
137 for (i=0; i<f_ncells; i++,j++) {
138 PyObject v = f_env[j].ob_ref;
139 if (v != null) f_locals.__setitem__(f_code.co_cellvars[i],v);
140 }
141 for (i=0; i<f_nfreevars; i++,j++) {
142 PyObject v = f_env[j].ob_ref;
143 if (v != null) f_locals.__setitem__(f_code.co_freevars[i],v);
144 }
145 }
146 return f_locals;
147 }
148
149 public void setline(int line) {
150 f_lineno = line;
151 if (tracefunc != null)
152 tracefunc = tracefunc.traceLine(this, line);
153 }
154
155 public int getline() {
156 return f_lineno;
157 }
158
159 public PyObject getlocal(int index) {
160 if (f_fastlocals != null) {
161 PyObject ret = f_fastlocals[index];
162 if (ret != null)
163 return ret;
164 }
165 return getlocal(f_code.co_varnames[index]);
166 }
167
168 public PyObject getlocal(String index) {
169 if (f_locals == null)
171 getf_locals();
172 PyObject ret = f_locals.__finditem__(index);
173 if (ret != null)
174 return ret;
175
176 throw Py.UnboundLocalError("local: '"+index+"'");
177 }
179
180 public PyObject getname(String index) {
181 if (f_locals == null) getf_locals();
182 if (f_locals == f_globals) return getglobal(index);
183
184 PyObject ret = f_locals.__finditem__(index);
185 if (ret != null) return ret;
186 return getglobal(index);
187 }
188
189 public PyObject getglobal(String index) {
190 PyObject ret = f_globals.__finditem__(index);
191 if (ret != null) {
192 return ret;
193 }
194
195 if (f_builtins == null) {
197 f_builtins = Py.getSystemState().builtins;
198 }
199 ret = f_builtins.__finditem__(index);
200 if (ret != null) return ret;
201
202 throw Py.NameError(index);
203 }
204
205 public void setlocal(int index, PyObject value) {
206 if (f_fastlocals != null)
207 f_fastlocals[index] = value;
208 else
209 setlocal(f_code.co_varnames[index], value);
210 }
211
212 public void setlocal(String index, PyObject value) {
213 if (f_locals == null)
214 getf_locals();
215 f_locals.__setitem__(index, value);
216 }
217
218 public void setglobal(String index, PyObject value) {
219 f_globals.__setitem__(index, value);
220 }
221
222 public void dellocal(int index) {
223 if (f_fastlocals != null) {
224 if (f_fastlocals[index] == null) {
225 throw Py.UnboundLocalError("local: '"+
226 f_code.co_varnames[index]+"'");
227 }
228 f_fastlocals[index] = null;
229 } else
230 dellocal(f_code.co_varnames[index]);
231 }
232
233 public void dellocal(String index) {
234 if (f_locals == null)
235 getf_locals();
236 try {
237 f_locals.__delitem__(index);
238 } catch(PyException e) {
239 if (!Py.matchException(e,Py.KeyError)) throw e;
240 throw Py.UnboundLocalError("local: '"+index+"'");
241 }
242 }
243
244 public void delglobal(String index) {
245 f_globals.__delitem__(index);
246 }
247
248
250 public PyObject getclosure(int index) {
251 return f_env[index];
252 }
253
254 public PyObject getderef(int index) {
255 PyObject obj=f_env[index].ob_ref;
256 if (obj != null) return obj;
257 String name;
258 if (index >= f_ncells) name = f_code.co_freevars[index-f_ncells];
259 else name = f_code.co_cellvars[index];
260 throw Py.UnboundLocalError("local: '"+name+"'");
261 }
262
263 public void setderef(int index,PyObject value) {
264 f_env[index].ob_ref = value;
265 }
266
267 public void to_cell(int parm_index,int env_index) {
268 f_env[env_index].ob_ref=f_fastlocals[parm_index];
269 }
270 }
271 |
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