1 |
578 |
markom |
/*
|
2 |
|
|
* ------------------------------------------------------------------------
|
3 |
|
|
* PACKAGE: [incr Tcl]
|
4 |
|
|
* DESCRIPTION: Object-Oriented Extensions to Tcl
|
5 |
|
|
*
|
6 |
|
|
* [incr Tcl] provides object-oriented extensions to Tcl, much as
|
7 |
|
|
* C++ provides object-oriented extensions to C. It provides a means
|
8 |
|
|
* of encapsulating related procedures together with their shared data
|
9 |
|
|
* in a local namespace that is hidden from the outside world. It
|
10 |
|
|
* promotes code re-use through inheritance. More than anything else,
|
11 |
|
|
* it encourages better organization of Tcl applications through the
|
12 |
|
|
* object-oriented paradigm, leading to code that is easier to
|
13 |
|
|
* understand and maintain.
|
14 |
|
|
*
|
15 |
|
|
* These procedures handle commands available within a class scope.
|
16 |
|
|
* In [incr Tcl], the term "method" is used for a procedure that has
|
17 |
|
|
* access to object-specific data, while the term "proc" is used for
|
18 |
|
|
* a procedure that has access only to common class data.
|
19 |
|
|
*
|
20 |
|
|
* ========================================================================
|
21 |
|
|
* AUTHOR: Michael J. McLennan
|
22 |
|
|
* Bell Labs Innovations for Lucent Technologies
|
23 |
|
|
* mmclennan@lucent.com
|
24 |
|
|
* http://www.tcltk.com/itcl
|
25 |
|
|
*
|
26 |
|
|
* RCS: $Id: itcl_methods.c,v 1.1.1.1 2002-01-16 10:24:46 markom Exp $
|
27 |
|
|
* ========================================================================
|
28 |
|
|
* Copyright (c) 1993-1998 Lucent Technologies, Inc.
|
29 |
|
|
* ------------------------------------------------------------------------
|
30 |
|
|
* See the file "license.terms" for information on usage and redistribution
|
31 |
|
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
32 |
|
|
*/
|
33 |
|
|
#include "itclInt.h"
|
34 |
|
|
#include "tclCompile.h"
|
35 |
|
|
|
36 |
|
|
/* CYGNUS LOCAL */
|
37 |
|
|
/* FIXME - it looks like Michael removed the dependance on these... */
|
38 |
|
|
#if 0
|
39 |
|
|
#ifdef __CYGWIN32__
|
40 |
|
|
|
41 |
|
|
/* On cygwin32, this is how we import these variables from the Tcl DLL. */
|
42 |
|
|
|
43 |
|
|
extern int *_imp__tclTraceCompile;
|
44 |
|
|
|
45 |
|
|
#define tclTraceCompile (*_imp__tclTraceCompile)
|
46 |
|
|
|
47 |
|
|
extern int *_imp__tclTraceExec;
|
48 |
|
|
|
49 |
|
|
#define tclTraceExec (*_imp__tclTraceExec)
|
50 |
|
|
|
51 |
|
|
extern Tcl_ObjType *_imp__tclByteCodeType;
|
52 |
|
|
|
53 |
|
|
#define tclByteCodeType (*_imp__tclByteCodeType)
|
54 |
|
|
|
55 |
|
|
#endif
|
56 |
|
|
#endif
|
57 |
|
|
/* END CYGNUS LOCAL */
|
58 |
|
|
|
59 |
|
|
/*
|
60 |
|
|
* FORWARD DECLARATIONS
|
61 |
|
|
*/
|
62 |
|
|
static int ItclParseConfig _ANSI_ARGS_((Tcl_Interp *interp,
|
63 |
|
|
int objc, Tcl_Obj *CONST objv[], ItclObject *contextObj,
|
64 |
|
|
int *rargc, ItclVarDefn ***rvars, char ***rvals));
|
65 |
|
|
|
66 |
|
|
static int ItclHandleConfig _ANSI_ARGS_((Tcl_Interp *interp,
|
67 |
|
|
int argc, ItclVarDefn **vars, char **vals, ItclObject *contextObj));
|
68 |
|
|
|
69 |
|
|
|
70 |
|
|
/*
|
71 |
|
|
* ------------------------------------------------------------------------
|
72 |
|
|
* Itcl_BodyCmd()
|
73 |
|
|
*
|
74 |
|
|
* Invoked by Tcl whenever the user issues an "itcl::body" command to
|
75 |
|
|
* define or redefine the implementation for a class method/proc.
|
76 |
|
|
* Handles the following syntax:
|
77 |
|
|
*
|
78 |
|
|
* itcl::body <class>::<func> <arglist> <body>
|
79 |
|
|
*
|
80 |
|
|
* Looks for an existing class member function with the name <func>,
|
81 |
|
|
* and if found, tries to assign the implementation. If an argument
|
82 |
|
|
* list was specified in the original declaration, it must match
|
83 |
|
|
* <arglist> or an error is flagged. If <body> has the form "@name"
|
84 |
|
|
* then it is treated as a reference to a C handling procedure;
|
85 |
|
|
* otherwise, it is taken as a body of Tcl statements.
|
86 |
|
|
*
|
87 |
|
|
* Returns TCL_OK/TCL_ERROR to indicate success/failure.
|
88 |
|
|
* ------------------------------------------------------------------------
|
89 |
|
|
*/
|
90 |
|
|
/* ARGSUSED */
|
91 |
|
|
int
|
92 |
|
|
Itcl_BodyCmd(dummy, interp, objc, objv)
|
93 |
|
|
ClientData dummy; /* unused */
|
94 |
|
|
Tcl_Interp *interp; /* current interpreter */
|
95 |
|
|
int objc; /* number of arguments */
|
96 |
|
|
Tcl_Obj *CONST objv[]; /* argument objects */
|
97 |
|
|
{
|
98 |
|
|
int status = TCL_OK;
|
99 |
|
|
|
100 |
|
|
char *head, *tail, *token, *arglist, *body;
|
101 |
|
|
ItclClass *cdefn;
|
102 |
|
|
ItclMemberFunc *mfunc;
|
103 |
|
|
Tcl_HashEntry *entry;
|
104 |
|
|
Tcl_DString buffer;
|
105 |
|
|
|
106 |
|
|
if (objc != 4) {
|
107 |
|
|
token = Tcl_GetStringFromObj(objv[0], (int*)NULL);
|
108 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
109 |
|
|
"wrong # args: should be \"",
|
110 |
|
|
token, " class::func arglist body\"",
|
111 |
|
|
(char*)NULL);
|
112 |
|
|
return TCL_ERROR;
|
113 |
|
|
}
|
114 |
|
|
|
115 |
|
|
/*
|
116 |
|
|
* Parse the member name "namesp::namesp::class::func".
|
117 |
|
|
* Make sure that a class name was specified, and that the
|
118 |
|
|
* class exists.
|
119 |
|
|
*/
|
120 |
|
|
token = Tcl_GetStringFromObj(objv[1], (int*)NULL);
|
121 |
|
|
Itcl_ParseNamespPath(token, &buffer, &head, &tail);
|
122 |
|
|
|
123 |
|
|
if (!head || *head == '\0') {
|
124 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
125 |
|
|
"missing class specifier for body declaration \"", token, "\"",
|
126 |
|
|
(char*)NULL);
|
127 |
|
|
status = TCL_ERROR;
|
128 |
|
|
goto bodyCmdDone;
|
129 |
|
|
}
|
130 |
|
|
|
131 |
|
|
cdefn = Itcl_FindClass(interp, head, /* autoload */ 1);
|
132 |
|
|
if (cdefn == NULL) {
|
133 |
|
|
status = TCL_ERROR;
|
134 |
|
|
goto bodyCmdDone;
|
135 |
|
|
}
|
136 |
|
|
|
137 |
|
|
/*
|
138 |
|
|
* Find the function and try to change its implementation.
|
139 |
|
|
* Note that command resolution table contains *all* functions,
|
140 |
|
|
* even those in a base class. Make sure that the class
|
141 |
|
|
* containing the method definition is the requested class.
|
142 |
|
|
*/
|
143 |
|
|
if (objc != 4) {
|
144 |
|
|
token = Tcl_GetStringFromObj(objv[0], (int*)NULL);
|
145 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
146 |
|
|
"wrong # args: should be \"",
|
147 |
|
|
token, " class::func arglist body\"",
|
148 |
|
|
(char*)NULL);
|
149 |
|
|
status = TCL_ERROR;
|
150 |
|
|
goto bodyCmdDone;
|
151 |
|
|
}
|
152 |
|
|
|
153 |
|
|
mfunc = NULL;
|
154 |
|
|
entry = Tcl_FindHashEntry(&cdefn->resolveCmds, tail);
|
155 |
|
|
if (entry) {
|
156 |
|
|
mfunc = (ItclMemberFunc*)Tcl_GetHashValue(entry);
|
157 |
|
|
if (mfunc->member->classDefn != cdefn) {
|
158 |
|
|
mfunc = NULL;
|
159 |
|
|
}
|
160 |
|
|
}
|
161 |
|
|
|
162 |
|
|
if (mfunc == NULL) {
|
163 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
164 |
|
|
"function \"", tail, "\" is not defined in class \"",
|
165 |
|
|
cdefn->fullname, "\"",
|
166 |
|
|
(char*)NULL);
|
167 |
|
|
status = TCL_ERROR;
|
168 |
|
|
goto bodyCmdDone;
|
169 |
|
|
}
|
170 |
|
|
|
171 |
|
|
arglist = Tcl_GetStringFromObj(objv[2], (int*)NULL);
|
172 |
|
|
body = Tcl_GetStringFromObj(objv[3], (int*)NULL);
|
173 |
|
|
|
174 |
|
|
if (Itcl_ChangeMemberFunc(interp, mfunc, arglist, body) != TCL_OK) {
|
175 |
|
|
status = TCL_ERROR;
|
176 |
|
|
goto bodyCmdDone;
|
177 |
|
|
}
|
178 |
|
|
|
179 |
|
|
bodyCmdDone:
|
180 |
|
|
Tcl_DStringFree(&buffer);
|
181 |
|
|
return status;
|
182 |
|
|
}
|
183 |
|
|
|
184 |
|
|
|
185 |
|
|
/*
|
186 |
|
|
* ------------------------------------------------------------------------
|
187 |
|
|
* Itcl_ConfigBodyCmd()
|
188 |
|
|
*
|
189 |
|
|
* Invoked by Tcl whenever the user issues an "itcl::configbody" command
|
190 |
|
|
* to define or redefine the configuration code associated with a
|
191 |
|
|
* public variable. Handles the following syntax:
|
192 |
|
|
*
|
193 |
|
|
* itcl::configbody <class>::<publicVar> <body>
|
194 |
|
|
*
|
195 |
|
|
* Looks for an existing public variable with the name <publicVar>,
|
196 |
|
|
* and if found, tries to assign the implementation. If <body> has
|
197 |
|
|
* the form "@name" then it is treated as a reference to a C handling
|
198 |
|
|
* procedure; otherwise, it is taken as a body of Tcl statements.
|
199 |
|
|
*
|
200 |
|
|
* Returns TCL_OK/TCL_ERROR to indicate success/failure.
|
201 |
|
|
* ------------------------------------------------------------------------
|
202 |
|
|
*/
|
203 |
|
|
/* ARGSUSED */
|
204 |
|
|
int
|
205 |
|
|
Itcl_ConfigBodyCmd(dummy, interp, objc, objv)
|
206 |
|
|
ClientData dummy; /* unused */
|
207 |
|
|
Tcl_Interp *interp; /* current interpreter */
|
208 |
|
|
int objc; /* number of arguments */
|
209 |
|
|
Tcl_Obj *CONST objv[]; /* argument objects */
|
210 |
|
|
{
|
211 |
|
|
int status = TCL_OK;
|
212 |
|
|
|
213 |
|
|
char *head, *tail, *token;
|
214 |
|
|
Tcl_DString buffer;
|
215 |
|
|
ItclClass *cdefn;
|
216 |
|
|
ItclVarLookup *vlookup;
|
217 |
|
|
ItclMember *member;
|
218 |
|
|
ItclMemberCode *mcode;
|
219 |
|
|
Tcl_HashEntry *entry;
|
220 |
|
|
|
221 |
|
|
if (objc != 3) {
|
222 |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "class::option body");
|
223 |
|
|
return TCL_ERROR;
|
224 |
|
|
}
|
225 |
|
|
|
226 |
|
|
/*
|
227 |
|
|
* Parse the member name "namesp::namesp::class::option".
|
228 |
|
|
* Make sure that a class name was specified, and that the
|
229 |
|
|
* class exists.
|
230 |
|
|
*/
|
231 |
|
|
token = Tcl_GetStringFromObj(objv[1], (int*)NULL);
|
232 |
|
|
Itcl_ParseNamespPath(token, &buffer, &head, &tail);
|
233 |
|
|
|
234 |
|
|
if (!head || *head == '\0') {
|
235 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
236 |
|
|
"missing class specifier for body declaration \"", token, "\"",
|
237 |
|
|
(char*)NULL);
|
238 |
|
|
status = TCL_ERROR;
|
239 |
|
|
goto configBodyCmdDone;
|
240 |
|
|
}
|
241 |
|
|
|
242 |
|
|
cdefn = Itcl_FindClass(interp, head, /* autoload */ 1);
|
243 |
|
|
if (cdefn == NULL) {
|
244 |
|
|
status = TCL_ERROR;
|
245 |
|
|
goto configBodyCmdDone;
|
246 |
|
|
}
|
247 |
|
|
|
248 |
|
|
/*
|
249 |
|
|
* Find the variable and change its implementation.
|
250 |
|
|
* Note that variable resolution table has *all* variables,
|
251 |
|
|
* even those in a base class. Make sure that the class
|
252 |
|
|
* containing the variable definition is the requested class.
|
253 |
|
|
*/
|
254 |
|
|
vlookup = NULL;
|
255 |
|
|
entry = Tcl_FindHashEntry(&cdefn->resolveVars, tail);
|
256 |
|
|
if (entry) {
|
257 |
|
|
vlookup = (ItclVarLookup*)Tcl_GetHashValue(entry);
|
258 |
|
|
if (vlookup->vdefn->member->classDefn != cdefn) {
|
259 |
|
|
vlookup = NULL;
|
260 |
|
|
}
|
261 |
|
|
}
|
262 |
|
|
|
263 |
|
|
if (vlookup == NULL) {
|
264 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
265 |
|
|
"option \"", tail, "\" is not defined in class \"",
|
266 |
|
|
cdefn->fullname, "\"",
|
267 |
|
|
(char*)NULL);
|
268 |
|
|
status = TCL_ERROR;
|
269 |
|
|
goto configBodyCmdDone;
|
270 |
|
|
}
|
271 |
|
|
member = vlookup->vdefn->member;
|
272 |
|
|
|
273 |
|
|
if (member->protection != ITCL_PUBLIC) {
|
274 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
275 |
|
|
"option \"", member->fullname,
|
276 |
|
|
"\" is not a public configuration option",
|
277 |
|
|
(char*)NULL);
|
278 |
|
|
status = TCL_ERROR;
|
279 |
|
|
goto configBodyCmdDone;
|
280 |
|
|
}
|
281 |
|
|
|
282 |
|
|
token = Tcl_GetStringFromObj(objv[2], (int*)NULL);
|
283 |
|
|
|
284 |
|
|
if (Itcl_CreateMemberCode(interp, cdefn, (char*)NULL, token,
|
285 |
|
|
&mcode) != TCL_OK) {
|
286 |
|
|
|
287 |
|
|
status = TCL_ERROR;
|
288 |
|
|
goto configBodyCmdDone;
|
289 |
|
|
}
|
290 |
|
|
|
291 |
|
|
Itcl_PreserveData((ClientData)mcode);
|
292 |
|
|
Itcl_EventuallyFree((ClientData)mcode, Itcl_DeleteMemberCode);
|
293 |
|
|
|
294 |
|
|
if (member->code) {
|
295 |
|
|
Itcl_ReleaseData((ClientData)member->code);
|
296 |
|
|
}
|
297 |
|
|
member->code = mcode;
|
298 |
|
|
|
299 |
|
|
configBodyCmdDone:
|
300 |
|
|
Tcl_DStringFree(&buffer);
|
301 |
|
|
return status;
|
302 |
|
|
}
|
303 |
|
|
|
304 |
|
|
|
305 |
|
|
/*
|
306 |
|
|
* ------------------------------------------------------------------------
|
307 |
|
|
* Itcl_CreateMethod()
|
308 |
|
|
*
|
309 |
|
|
* Installs a method into the namespace associated with a class.
|
310 |
|
|
* If another command with the same name is already installed, then
|
311 |
|
|
* it is overwritten.
|
312 |
|
|
*
|
313 |
|
|
* Returns TCL_OK on success, or TCL_ERROR (along with an error message
|
314 |
|
|
* in the specified interp) if anything goes wrong.
|
315 |
|
|
* ------------------------------------------------------------------------
|
316 |
|
|
*/
|
317 |
|
|
int
|
318 |
|
|
Itcl_CreateMethod(interp, cdefn, name, arglist, body)
|
319 |
|
|
Tcl_Interp* interp; /* interpreter managing this action */
|
320 |
|
|
ItclClass *cdefn; /* class definition */
|
321 |
|
|
char* name; /* name of new method */
|
322 |
|
|
char* arglist; /* space-separated list of arg names */
|
323 |
|
|
char* body; /* body of commands for the method */
|
324 |
|
|
{
|
325 |
|
|
ItclMemberFunc *mfunc;
|
326 |
|
|
Tcl_DString buffer;
|
327 |
|
|
|
328 |
|
|
/*
|
329 |
|
|
* Make sure that the method name does not contain anything
|
330 |
|
|
* goofy like a "::" scope qualifier.
|
331 |
|
|
*/
|
332 |
|
|
if (strstr(name,"::")) {
|
333 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
334 |
|
|
"bad method name \"", name, "\"",
|
335 |
|
|
(char*)NULL);
|
336 |
|
|
return TCL_ERROR;
|
337 |
|
|
}
|
338 |
|
|
|
339 |
|
|
/*
|
340 |
|
|
* Create the method definition.
|
341 |
|
|
*/
|
342 |
|
|
if (Itcl_CreateMemberFunc(interp, cdefn, name, arglist, body, &mfunc)
|
343 |
|
|
!= TCL_OK) {
|
344 |
|
|
return TCL_ERROR;
|
345 |
|
|
}
|
346 |
|
|
|
347 |
|
|
/*
|
348 |
|
|
* Build a fully-qualified name for the method, and install
|
349 |
|
|
* the command handler.
|
350 |
|
|
*/
|
351 |
|
|
Tcl_DStringInit(&buffer);
|
352 |
|
|
Tcl_DStringAppend(&buffer, cdefn->namesp->fullName, -1);
|
353 |
|
|
Tcl_DStringAppend(&buffer, "::", 2);
|
354 |
|
|
Tcl_DStringAppend(&buffer, name, -1);
|
355 |
|
|
name = Tcl_DStringValue(&buffer);
|
356 |
|
|
|
357 |
|
|
Itcl_PreserveData((ClientData)mfunc);
|
358 |
|
|
mfunc->accessCmd = Tcl_CreateObjCommand(interp, name, Itcl_ExecMethod,
|
359 |
|
|
(ClientData)mfunc, Itcl_ReleaseData);
|
360 |
|
|
|
361 |
|
|
Tcl_DStringFree(&buffer);
|
362 |
|
|
return TCL_OK;
|
363 |
|
|
}
|
364 |
|
|
|
365 |
|
|
|
366 |
|
|
/*
|
367 |
|
|
* ------------------------------------------------------------------------
|
368 |
|
|
* Itcl_CreateProc()
|
369 |
|
|
*
|
370 |
|
|
* Installs a class proc into the namespace associated with a class.
|
371 |
|
|
* If another command with the same name is already installed, then
|
372 |
|
|
* it is overwritten. Returns TCL_OK on success, or TCL_ERROR (along
|
373 |
|
|
* with an error message in the specified interp) if anything goes
|
374 |
|
|
* wrong.
|
375 |
|
|
* ------------------------------------------------------------------------
|
376 |
|
|
*/
|
377 |
|
|
int
|
378 |
|
|
Itcl_CreateProc(interp, cdefn, name, arglist, body)
|
379 |
|
|
Tcl_Interp* interp; /* interpreter managing this action */
|
380 |
|
|
ItclClass *cdefn; /* class definition */
|
381 |
|
|
char* name; /* name of new proc */
|
382 |
|
|
char* arglist; /* space-separated list of arg names */
|
383 |
|
|
char* body; /* body of commands for the proc */
|
384 |
|
|
{
|
385 |
|
|
ItclMemberFunc *mfunc;
|
386 |
|
|
Tcl_DString buffer;
|
387 |
|
|
|
388 |
|
|
/*
|
389 |
|
|
* Make sure that the proc name does not contain anything
|
390 |
|
|
* goofy like a "::" scope qualifier.
|
391 |
|
|
*/
|
392 |
|
|
if (strstr(name,"::")) {
|
393 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
394 |
|
|
"bad proc name \"", name, "\"",
|
395 |
|
|
(char*)NULL);
|
396 |
|
|
return TCL_ERROR;
|
397 |
|
|
}
|
398 |
|
|
|
399 |
|
|
/*
|
400 |
|
|
* Create the proc definition.
|
401 |
|
|
*/
|
402 |
|
|
if (Itcl_CreateMemberFunc(interp, cdefn, name, arglist, body, &mfunc)
|
403 |
|
|
!= TCL_OK) {
|
404 |
|
|
return TCL_ERROR;
|
405 |
|
|
}
|
406 |
|
|
|
407 |
|
|
/*
|
408 |
|
|
* Mark procs as "common". This distinguishes them from methods.
|
409 |
|
|
*/
|
410 |
|
|
mfunc->member->flags |= ITCL_COMMON;
|
411 |
|
|
|
412 |
|
|
/*
|
413 |
|
|
* Build a fully-qualified name for the proc, and install
|
414 |
|
|
* the command handler.
|
415 |
|
|
*/
|
416 |
|
|
Tcl_DStringInit(&buffer);
|
417 |
|
|
Tcl_DStringAppend(&buffer, cdefn->namesp->fullName, -1);
|
418 |
|
|
Tcl_DStringAppend(&buffer, "::", 2);
|
419 |
|
|
Tcl_DStringAppend(&buffer, name, -1);
|
420 |
|
|
name = Tcl_DStringValue(&buffer);
|
421 |
|
|
|
422 |
|
|
Itcl_PreserveData((ClientData)mfunc);
|
423 |
|
|
mfunc->accessCmd = Tcl_CreateObjCommand(interp, name, Itcl_ExecProc,
|
424 |
|
|
(ClientData)mfunc, Itcl_ReleaseData);
|
425 |
|
|
|
426 |
|
|
Tcl_DStringFree(&buffer);
|
427 |
|
|
return TCL_OK;
|
428 |
|
|
}
|
429 |
|
|
|
430 |
|
|
|
431 |
|
|
/*
|
432 |
|
|
* ------------------------------------------------------------------------
|
433 |
|
|
* Itcl_CreateMemberFunc()
|
434 |
|
|
*
|
435 |
|
|
* Creates the data record representing a member function. This
|
436 |
|
|
* includes the argument list and the body of the function. If the
|
437 |
|
|
* body is of the form "@name", then it is treated as a label for
|
438 |
|
|
* a C procedure registered by Itcl_RegisterC().
|
439 |
|
|
*
|
440 |
|
|
* If any errors are encountered, this procedure returns TCL_ERROR
|
441 |
|
|
* along with an error message in the interpreter. Otherwise, it
|
442 |
|
|
* returns TCL_OK, and "mfuncPtr" returns a pointer to the new
|
443 |
|
|
* member function.
|
444 |
|
|
* ------------------------------------------------------------------------
|
445 |
|
|
*/
|
446 |
|
|
int
|
447 |
|
|
Itcl_CreateMemberFunc(interp, cdefn, name, arglist, body, mfuncPtr)
|
448 |
|
|
Tcl_Interp* interp; /* interpreter managing this action */
|
449 |
|
|
ItclClass *cdefn; /* class definition */
|
450 |
|
|
char* name; /* name of new member */
|
451 |
|
|
char* arglist; /* space-separated list of arg names */
|
452 |
|
|
char* body; /* body of commands for the method */
|
453 |
|
|
ItclMemberFunc** mfuncPtr; /* returns: pointer to new method defn */
|
454 |
|
|
{
|
455 |
|
|
int newEntry;
|
456 |
|
|
ItclMemberFunc *mfunc;
|
457 |
|
|
ItclMemberCode *mcode;
|
458 |
|
|
Tcl_HashEntry *entry;
|
459 |
|
|
|
460 |
|
|
/*
|
461 |
|
|
* Add the member function to the list of functions for
|
462 |
|
|
* the class. Make sure that a member function with the
|
463 |
|
|
* same name doesn't already exist.
|
464 |
|
|
*/
|
465 |
|
|
entry = Tcl_CreateHashEntry(&cdefn->functions, name, &newEntry);
|
466 |
|
|
|
467 |
|
|
if (!newEntry) {
|
468 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
469 |
|
|
"\"", name, "\" already defined in class \"",
|
470 |
|
|
cdefn->fullname, "\"",
|
471 |
|
|
(char*)NULL);
|
472 |
|
|
return TCL_ERROR;
|
473 |
|
|
}
|
474 |
|
|
|
475 |
|
|
/*
|
476 |
|
|
* Try to create the implementation for this command member.
|
477 |
|
|
*/
|
478 |
|
|
if (Itcl_CreateMemberCode(interp, cdefn, arglist, body,
|
479 |
|
|
&mcode) != TCL_OK) {
|
480 |
|
|
|
481 |
|
|
Tcl_DeleteHashEntry(entry);
|
482 |
|
|
return TCL_ERROR;
|
483 |
|
|
}
|
484 |
|
|
Itcl_PreserveData((ClientData)mcode);
|
485 |
|
|
Itcl_EventuallyFree((ClientData)mcode, Itcl_DeleteMemberCode);
|
486 |
|
|
|
487 |
|
|
/*
|
488 |
|
|
* Allocate a member function definition and return.
|
489 |
|
|
*/
|
490 |
|
|
mfunc = (ItclMemberFunc*)ckalloc(sizeof(ItclMemberFunc));
|
491 |
|
|
mfunc->member = Itcl_CreateMember(interp, cdefn, name);
|
492 |
|
|
mfunc->member->code = mcode;
|
493 |
|
|
|
494 |
|
|
if (mfunc->member->protection == ITCL_DEFAULT_PROTECT) {
|
495 |
|
|
mfunc->member->protection = ITCL_PUBLIC;
|
496 |
|
|
}
|
497 |
|
|
|
498 |
|
|
mfunc->arglist = NULL;
|
499 |
|
|
mfunc->argcount = 0;
|
500 |
|
|
mfunc->accessCmd = NULL;
|
501 |
|
|
|
502 |
|
|
if (arglist) {
|
503 |
|
|
mfunc->member->flags |= ITCL_ARG_SPEC;
|
504 |
|
|
}
|
505 |
|
|
if (mcode->arglist) {
|
506 |
|
|
Itcl_CreateArgList(interp, arglist, &mfunc->argcount, &mfunc->arglist);
|
507 |
|
|
}
|
508 |
|
|
|
509 |
|
|
if (strcmp(name,"constructor") == 0) {
|
510 |
|
|
mfunc->member->flags |= ITCL_CONSTRUCTOR;
|
511 |
|
|
}
|
512 |
|
|
if (strcmp(name,"destructor") == 0) {
|
513 |
|
|
mfunc->member->flags |= ITCL_DESTRUCTOR;
|
514 |
|
|
}
|
515 |
|
|
|
516 |
|
|
Tcl_SetHashValue(entry, (ClientData)mfunc);
|
517 |
|
|
Itcl_PreserveData((ClientData)mfunc);
|
518 |
|
|
Itcl_EventuallyFree((ClientData)mfunc, Itcl_DeleteMemberFunc);
|
519 |
|
|
|
520 |
|
|
*mfuncPtr = mfunc;
|
521 |
|
|
return TCL_OK;
|
522 |
|
|
}
|
523 |
|
|
|
524 |
|
|
|
525 |
|
|
/*
|
526 |
|
|
* ------------------------------------------------------------------------
|
527 |
|
|
* Itcl_ChangeMemberFunc()
|
528 |
|
|
*
|
529 |
|
|
* Modifies the data record representing a member function. This
|
530 |
|
|
* is usually the body of the function, but can include the argument
|
531 |
|
|
* list if it was not defined when the member was first created.
|
532 |
|
|
* If the body is of the form "@name", then it is treated as a label
|
533 |
|
|
* for a C procedure registered by Itcl_RegisterC().
|
534 |
|
|
*
|
535 |
|
|
* If any errors are encountered, this procedure returns TCL_ERROR
|
536 |
|
|
* along with an error message in the interpreter. Otherwise, it
|
537 |
|
|
* returns TCL_OK, and "mfuncPtr" returns a pointer to the new
|
538 |
|
|
* member function.
|
539 |
|
|
* ------------------------------------------------------------------------
|
540 |
|
|
*/
|
541 |
|
|
int
|
542 |
|
|
Itcl_ChangeMemberFunc(interp, mfunc, arglist, body)
|
543 |
|
|
Tcl_Interp* interp; /* interpreter managing this action */
|
544 |
|
|
ItclMemberFunc* mfunc; /* command member being changed */
|
545 |
|
|
char* arglist; /* space-separated list of arg names */
|
546 |
|
|
char* body; /* body of commands for the method */
|
547 |
|
|
{
|
548 |
|
|
ItclMemberCode *mcode = NULL;
|
549 |
|
|
Tcl_Obj *objPtr;
|
550 |
|
|
|
551 |
|
|
/*
|
552 |
|
|
* Try to create the implementation for this command member.
|
553 |
|
|
*/
|
554 |
|
|
if (Itcl_CreateMemberCode(interp, mfunc->member->classDefn,
|
555 |
|
|
arglist, body, &mcode) != TCL_OK) {
|
556 |
|
|
|
557 |
|
|
return TCL_ERROR;
|
558 |
|
|
}
|
559 |
|
|
|
560 |
|
|
/*
|
561 |
|
|
* If the argument list was defined when the function was
|
562 |
|
|
* created, compare the arg lists or usage strings to make sure
|
563 |
|
|
* that the interface is not being redefined.
|
564 |
|
|
*/
|
565 |
|
|
if ((mfunc->member->flags & ITCL_ARG_SPEC) != 0 &&
|
566 |
|
|
!Itcl_EquivArgLists(mfunc->arglist, mfunc->argcount,
|
567 |
|
|
mcode->arglist, mcode->argcount)) {
|
568 |
|
|
|
569 |
|
|
objPtr = Itcl_ArgList(mfunc->argcount, mfunc->arglist);
|
570 |
|
|
Tcl_IncrRefCount(objPtr);
|
571 |
|
|
|
572 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
573 |
|
|
"argument list changed for function \"",
|
574 |
|
|
mfunc->member->fullname, "\": should be \"",
|
575 |
|
|
Tcl_GetStringFromObj(objPtr, (int*)NULL), "\"",
|
576 |
|
|
(char*)NULL);
|
577 |
|
|
Tcl_DecrRefCount(objPtr);
|
578 |
|
|
|
579 |
|
|
Itcl_DeleteMemberCode((char*)mcode);
|
580 |
|
|
return TCL_ERROR;
|
581 |
|
|
}
|
582 |
|
|
|
583 |
|
|
/*
|
584 |
|
|
* Free up the old implementation and install the new one.
|
585 |
|
|
*/
|
586 |
|
|
Itcl_PreserveData((ClientData)mcode);
|
587 |
|
|
Itcl_EventuallyFree((ClientData)mcode, Itcl_DeleteMemberCode);
|
588 |
|
|
|
589 |
|
|
Itcl_ReleaseData((ClientData)mfunc->member->code);
|
590 |
|
|
mfunc->member->code = mcode;
|
591 |
|
|
|
592 |
|
|
return TCL_OK;
|
593 |
|
|
}
|
594 |
|
|
|
595 |
|
|
|
596 |
|
|
/*
|
597 |
|
|
* ------------------------------------------------------------------------
|
598 |
|
|
* Itcl_DeleteMemberFunc()
|
599 |
|
|
*
|
600 |
|
|
* Destroys all data associated with the given member function definition.
|
601 |
|
|
* Usually invoked by the interpreter when a member function is deleted.
|
602 |
|
|
* ------------------------------------------------------------------------
|
603 |
|
|
*/
|
604 |
|
|
void
|
605 |
|
|
Itcl_DeleteMemberFunc(cdata)
|
606 |
|
|
char* cdata; /* pointer to member function definition */
|
607 |
|
|
{
|
608 |
|
|
ItclMemberFunc* mfunc = (ItclMemberFunc*)cdata;
|
609 |
|
|
|
610 |
|
|
if (mfunc) {
|
611 |
|
|
Itcl_DeleteMember(mfunc->member);
|
612 |
|
|
|
613 |
|
|
if (mfunc->arglist) {
|
614 |
|
|
Itcl_DeleteArgList(mfunc->arglist);
|
615 |
|
|
}
|
616 |
|
|
ckfree((char*)mfunc);
|
617 |
|
|
}
|
618 |
|
|
}
|
619 |
|
|
|
620 |
|
|
|
621 |
|
|
/*
|
622 |
|
|
* ------------------------------------------------------------------------
|
623 |
|
|
* Itcl_CreateMemberCode()
|
624 |
|
|
*
|
625 |
|
|
* Creates the data record representing the implementation behind a
|
626 |
|
|
* class member function. This includes the argument list and the body
|
627 |
|
|
* of the function. If the body is of the form "@name", then it is
|
628 |
|
|
* treated as a label for a C procedure registered by Itcl_RegisterC().
|
629 |
|
|
*
|
630 |
|
|
* The implementation is kept by the member function definition, and
|
631 |
|
|
* controlled by a preserve/release paradigm. That way, if it is in
|
632 |
|
|
* use while it is being redefined, it will stay around long enough
|
633 |
|
|
* to avoid a core dump.
|
634 |
|
|
*
|
635 |
|
|
* If any errors are encountered, this procedure returns TCL_ERROR
|
636 |
|
|
* along with an error message in the interpreter. Otherwise, it
|
637 |
|
|
* returns TCL_OK, and "mcodePtr" returns a pointer to the new
|
638 |
|
|
* implementation.
|
639 |
|
|
* ------------------------------------------------------------------------
|
640 |
|
|
*/
|
641 |
|
|
int
|
642 |
|
|
Itcl_CreateMemberCode(interp, cdefn, arglist, body, mcodePtr)
|
643 |
|
|
Tcl_Interp* interp; /* interpreter managing this action */
|
644 |
|
|
ItclClass *cdefn; /* class containing this member */
|
645 |
|
|
char* arglist; /* space-separated list of arg names */
|
646 |
|
|
char* body; /* body of commands for the method */
|
647 |
|
|
ItclMemberCode** mcodePtr; /* returns: pointer to new implementation */
|
648 |
|
|
{
|
649 |
|
|
int argc;
|
650 |
|
|
CompiledLocal *args, *localPtr;
|
651 |
|
|
ItclMemberCode *mcode;
|
652 |
|
|
Proc *procPtr;
|
653 |
|
|
|
654 |
|
|
/*
|
655 |
|
|
* Allocate some space to hold the implementation.
|
656 |
|
|
*/
|
657 |
|
|
mcode = (ItclMemberCode*)ckalloc(sizeof(ItclMemberCode));
|
658 |
|
|
mcode->flags = 0;
|
659 |
|
|
mcode->argcount = 0;
|
660 |
|
|
mcode->arglist = NULL;
|
661 |
|
|
mcode->procPtr = NULL;
|
662 |
|
|
mcode->cfunc.objCmd = NULL;
|
663 |
|
|
mcode->clientData = NULL;
|
664 |
|
|
|
665 |
|
|
if (arglist) {
|
666 |
|
|
if (Itcl_CreateArgList(interp, arglist, &argc, &args)
|
667 |
|
|
!= TCL_OK) {
|
668 |
|
|
|
669 |
|
|
Itcl_DeleteMemberCode((char*)mcode);
|
670 |
|
|
return TCL_ERROR;
|
671 |
|
|
}
|
672 |
|
|
mcode->argcount = argc;
|
673 |
|
|
mcode->arglist = args;
|
674 |
|
|
mcode->flags |= ITCL_ARG_SPEC;
|
675 |
|
|
} else {
|
676 |
|
|
argc = 0;
|
677 |
|
|
args = NULL;
|
678 |
|
|
}
|
679 |
|
|
|
680 |
|
|
/*
|
681 |
|
|
* Create a standard Tcl Proc representation for this code body.
|
682 |
|
|
* This is required, since the Tcl compiler looks for a proc
|
683 |
|
|
* when handling things such as the call frame context and
|
684 |
|
|
* compiled locals.
|
685 |
|
|
*/
|
686 |
|
|
procPtr = (Proc*)ckalloc(sizeof(Proc));
|
687 |
|
|
mcode->procPtr = procPtr;
|
688 |
|
|
|
689 |
|
|
procPtr->iPtr = (Interp*)interp;
|
690 |
|
|
procPtr->refCount = 1;
|
691 |
|
|
procPtr->cmdPtr = (Command*)ckalloc(sizeof(Command));
|
692 |
|
|
procPtr->cmdPtr->nsPtr = (Namespace*)cdefn->namesp;
|
693 |
|
|
|
694 |
|
|
if (body) {
|
695 |
|
|
procPtr->bodyPtr = Tcl_NewStringObj(body, -1);
|
696 |
|
|
Tcl_IncrRefCount(procPtr->bodyPtr);
|
697 |
|
|
} else {
|
698 |
|
|
procPtr->bodyPtr = NULL;
|
699 |
|
|
}
|
700 |
|
|
|
701 |
|
|
/*
|
702 |
|
|
* Plug the argument list into the "compiled locals" list.
|
703 |
|
|
*
|
704 |
|
|
* NOTE: The storage for this argument list is owned by
|
705 |
|
|
* the caller, so although we plug it in here, it is not
|
706 |
|
|
* our responsibility to free it.
|
707 |
|
|
*/
|
708 |
|
|
procPtr->firstLocalPtr = args;
|
709 |
|
|
procPtr->lastLocalPtr = NULL;
|
710 |
|
|
|
711 |
|
|
for (localPtr=mcode->arglist; localPtr; localPtr=localPtr->nextPtr) {
|
712 |
|
|
procPtr->lastLocalPtr = localPtr;
|
713 |
|
|
}
|
714 |
|
|
procPtr->numArgs = argc;
|
715 |
|
|
procPtr->numCompiledLocals = argc;
|
716 |
|
|
|
717 |
|
|
/*
|
718 |
|
|
* If the body definition starts with '@', then treat the value
|
719 |
|
|
* as a symbolic name for a C procedure.
|
720 |
|
|
*/
|
721 |
|
|
if (body == NULL) {
|
722 |
|
|
mcode->flags |= ITCL_IMPLEMENT_NONE;
|
723 |
|
|
}
|
724 |
|
|
else if (*body == '@') {
|
725 |
|
|
Tcl_CmdProc *argCmdProc;
|
726 |
|
|
Tcl_ObjCmdProc *objCmdProc;
|
727 |
|
|
ClientData cdata;
|
728 |
|
|
|
729 |
|
|
if (!Itcl_FindC(interp, body+1, &argCmdProc, &objCmdProc, &cdata)) {
|
730 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
731 |
|
|
"no registered C procedure with name \"", body+1, "\"",
|
732 |
|
|
(char*)NULL);
|
733 |
|
|
Itcl_DeleteMemberCode((char*)mcode);
|
734 |
|
|
return TCL_ERROR;
|
735 |
|
|
}
|
736 |
|
|
|
737 |
|
|
if (objCmdProc != NULL) {
|
738 |
|
|
mcode->flags |= ITCL_IMPLEMENT_OBJCMD;
|
739 |
|
|
mcode->cfunc.objCmd = objCmdProc;
|
740 |
|
|
mcode->clientData = cdata;
|
741 |
|
|
}
|
742 |
|
|
else if (argCmdProc != NULL) {
|
743 |
|
|
mcode->flags |= ITCL_IMPLEMENT_ARGCMD;
|
744 |
|
|
mcode->cfunc.argCmd = argCmdProc;
|
745 |
|
|
mcode->clientData = cdata;
|
746 |
|
|
}
|
747 |
|
|
}
|
748 |
|
|
|
749 |
|
|
/*
|
750 |
|
|
* Otherwise, treat the body as a chunk of Tcl code.
|
751 |
|
|
*/
|
752 |
|
|
else {
|
753 |
|
|
mcode->flags |= ITCL_IMPLEMENT_TCL;
|
754 |
|
|
}
|
755 |
|
|
|
756 |
|
|
*mcodePtr = mcode;
|
757 |
|
|
return TCL_OK;
|
758 |
|
|
}
|
759 |
|
|
|
760 |
|
|
|
761 |
|
|
/*
|
762 |
|
|
* ------------------------------------------------------------------------
|
763 |
|
|
* Itcl_DeleteMemberCode()
|
764 |
|
|
*
|
765 |
|
|
* Destroys all data associated with the given command implementation.
|
766 |
|
|
* Invoked automatically by Itcl_ReleaseData() when the implementation
|
767 |
|
|
* is no longer being used.
|
768 |
|
|
* ------------------------------------------------------------------------
|
769 |
|
|
*/
|
770 |
|
|
void
|
771 |
|
|
Itcl_DeleteMemberCode(cdata)
|
772 |
|
|
char* cdata; /* pointer to member function definition */
|
773 |
|
|
{
|
774 |
|
|
ItclMemberCode* mcode = (ItclMemberCode*)cdata;
|
775 |
|
|
|
776 |
|
|
if (mcode->arglist) {
|
777 |
|
|
Itcl_DeleteArgList(mcode->arglist);
|
778 |
|
|
}
|
779 |
|
|
if (mcode->procPtr) {
|
780 |
|
|
ckfree((char*) mcode->procPtr->cmdPtr);
|
781 |
|
|
|
782 |
|
|
/* don't free compiled locals -- that is handled by arglist above */
|
783 |
|
|
|
784 |
|
|
if (mcode->procPtr->bodyPtr) {
|
785 |
|
|
Tcl_DecrRefCount(mcode->procPtr->bodyPtr);
|
786 |
|
|
}
|
787 |
|
|
ckfree((char*)mcode->procPtr);
|
788 |
|
|
}
|
789 |
|
|
ckfree((char*)mcode);
|
790 |
|
|
}
|
791 |
|
|
|
792 |
|
|
|
793 |
|
|
/*
|
794 |
|
|
* ------------------------------------------------------------------------
|
795 |
|
|
* Itcl_GetMemberCode()
|
796 |
|
|
*
|
797 |
|
|
* Makes sure that the implementation for an [incr Tcl] code body is
|
798 |
|
|
* ready to run. Note that a member function can be declared without
|
799 |
|
|
* being defined. The class definition may contain a declaration of
|
800 |
|
|
* the member function, but its body may be defined in a separate file.
|
801 |
|
|
* If an undefined function is encountered, this routine automatically
|
802 |
|
|
* attempts to autoload it. If the body is implemented via Tcl code,
|
803 |
|
|
* then it is compiled here as well.
|
804 |
|
|
*
|
805 |
|
|
* Returns TCL_ERROR (along with an error message in the interpreter)
|
806 |
|
|
* if an error is encountered, or if the implementation is not defined
|
807 |
|
|
* and cannot be autoloaded. Returns TCL_OK if implementation is
|
808 |
|
|
* ready to use.
|
809 |
|
|
* ------------------------------------------------------------------------
|
810 |
|
|
*/
|
811 |
|
|
int
|
812 |
|
|
Itcl_GetMemberCode(interp, member)
|
813 |
|
|
Tcl_Interp* interp; /* interpreter managing this action */
|
814 |
|
|
ItclMember* member; /* member containing code body */
|
815 |
|
|
{
|
816 |
|
|
ItclMemberCode *mcode = member->code;
|
817 |
|
|
|
818 |
|
|
int result;
|
819 |
|
|
|
820 |
|
|
/*
|
821 |
|
|
* If the implementation has not yet been defined, try to
|
822 |
|
|
* autoload it now.
|
823 |
|
|
*/
|
824 |
|
|
if ((mcode->flags & ITCL_IMPLEMENT_NONE) != 0) {
|
825 |
|
|
result = Tcl_VarEval(interp, "::auto_load ", member->fullname,
|
826 |
|
|
(char*)NULL);
|
827 |
|
|
|
828 |
|
|
if (result != TCL_OK) {
|
829 |
|
|
char msg[256];
|
830 |
|
|
sprintf(msg, "\n (while autoloading code for \"%.100s\")",
|
831 |
|
|
member->fullname);
|
832 |
|
|
Tcl_AddErrorInfo(interp, msg);
|
833 |
|
|
return result;
|
834 |
|
|
}
|
835 |
|
|
Tcl_ResetResult(interp); /* get rid of 1/0 status */
|
836 |
|
|
}
|
837 |
|
|
|
838 |
|
|
/*
|
839 |
|
|
* If the implementation is still not available, then
|
840 |
|
|
* autoloading must have failed.
|
841 |
|
|
*
|
842 |
|
|
* TRICKY NOTE: If code has been autoloaded, then the
|
843 |
|
|
* old mcode pointer is probably invalid. Go back to
|
844 |
|
|
* the member and look at the current code pointer again.
|
845 |
|
|
*/
|
846 |
|
|
mcode = member->code;
|
847 |
|
|
|
848 |
|
|
if ((mcode->flags & ITCL_IMPLEMENT_NONE) != 0) {
|
849 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
850 |
|
|
"member function \"", member->fullname,
|
851 |
|
|
"\" is not defined and cannot be autoloaded",
|
852 |
|
|
(char*)NULL);
|
853 |
|
|
return TCL_ERROR;
|
854 |
|
|
}
|
855 |
|
|
|
856 |
|
|
/*
|
857 |
|
|
* If the member is a constructor and the class has an
|
858 |
|
|
* initialization command, compile it here.
|
859 |
|
|
*/
|
860 |
|
|
if ((member->flags & ITCL_CONSTRUCTOR) != 0 &&
|
861 |
|
|
(member->classDefn->initCode != NULL)) {
|
862 |
|
|
|
863 |
|
|
result = TclProcCompileProc(interp, mcode->procPtr,
|
864 |
|
|
member->classDefn->initCode, (Namespace*)member->classDefn->namesp,
|
865 |
|
|
"initialization code for", member->fullname);
|
866 |
|
|
|
867 |
|
|
if (result != TCL_OK) {
|
868 |
|
|
return result;
|
869 |
|
|
}
|
870 |
|
|
}
|
871 |
|
|
|
872 |
|
|
/*
|
873 |
|
|
* If the code body has a Tcl implementation, then compile it here.
|
874 |
|
|
*/
|
875 |
|
|
if ((mcode->flags & ITCL_IMPLEMENT_TCL) != 0) {
|
876 |
|
|
|
877 |
|
|
result = TclProcCompileProc(interp, mcode->procPtr,
|
878 |
|
|
mcode->procPtr->bodyPtr, (Namespace*)member->classDefn->namesp,
|
879 |
|
|
"body for", member->fullname);
|
880 |
|
|
|
881 |
|
|
if (result != TCL_OK) {
|
882 |
|
|
return result;
|
883 |
|
|
}
|
884 |
|
|
}
|
885 |
|
|
return TCL_OK;
|
886 |
|
|
}
|
887 |
|
|
|
888 |
|
|
|
889 |
|
|
/*
|
890 |
|
|
* ------------------------------------------------------------------------
|
891 |
|
|
* Itcl_EvalMemberCode()
|
892 |
|
|
*
|
893 |
|
|
* Used to execute an ItclMemberCode representation of a code
|
894 |
|
|
* fragment. This code may be a body of Tcl commands, or a C handler
|
895 |
|
|
* procedure.
|
896 |
|
|
*
|
897 |
|
|
* Executes the command with the given arguments (objc,objv) and
|
898 |
|
|
* returns an integer status code (TCL_OK/TCL_ERROR). Returns the
|
899 |
|
|
* result string or an error message in the interpreter.
|
900 |
|
|
* ------------------------------------------------------------------------
|
901 |
|
|
*/
|
902 |
|
|
int
|
903 |
|
|
Itcl_EvalMemberCode(interp, mfunc, member, contextObj, objc, objv)
|
904 |
|
|
Tcl_Interp *interp; /* current interpreter */
|
905 |
|
|
ItclMemberFunc *mfunc; /* member func, or NULL (for error messages) */
|
906 |
|
|
ItclMember *member; /* command member containing code */
|
907 |
|
|
ItclObject *contextObj; /* object context, or NULL */
|
908 |
|
|
int objc; /* number of arguments */
|
909 |
|
|
Tcl_Obj *CONST objv[]; /* argument objects */
|
910 |
|
|
{
|
911 |
|
|
int result = TCL_OK;
|
912 |
|
|
Tcl_CallFrame *oldFramePtr = NULL;
|
913 |
|
|
|
914 |
|
|
int i, transparent, newEntry;
|
915 |
|
|
ItclObjectInfo *info;
|
916 |
|
|
ItclMemberCode *mcode;
|
917 |
|
|
ItclContext context;
|
918 |
|
|
Tcl_CallFrame *framePtr, *transFramePtr;
|
919 |
|
|
|
920 |
|
|
/*
|
921 |
|
|
* If this code does not have an implementation yet, then
|
922 |
|
|
* try to autoload one. Also, if this is Tcl code, make sure
|
923 |
|
|
* that it's compiled and ready to use.
|
924 |
|
|
*/
|
925 |
|
|
if (Itcl_GetMemberCode(interp, member) != TCL_OK) {
|
926 |
|
|
return TCL_ERROR;
|
927 |
|
|
}
|
928 |
|
|
mcode = member->code;
|
929 |
|
|
|
930 |
|
|
/*
|
931 |
|
|
* Bump the reference count on this code, in case it is
|
932 |
|
|
* redefined or deleted during execution.
|
933 |
|
|
*/
|
934 |
|
|
Itcl_PreserveData((ClientData)mcode);
|
935 |
|
|
|
936 |
|
|
/*
|
937 |
|
|
* Install a new call frame context for the current code.
|
938 |
|
|
* If the current call frame is marked as "transparent", then
|
939 |
|
|
* do an "uplevel" operation to move past it. Transparent
|
940 |
|
|
* call frames are installed by Itcl_HandleInstance. They
|
941 |
|
|
* provide a way of entering an object context without
|
942 |
|
|
* interfering with the normal call stack.
|
943 |
|
|
*/
|
944 |
|
|
transparent = 0;
|
945 |
|
|
|
946 |
|
|
info = member->classDefn->info;
|
947 |
|
|
framePtr = _Tcl_GetCallFrame(interp, 0);
|
948 |
|
|
for (i = Itcl_GetStackSize(&info->transparentFrames)-1; i >= 0; i--) {
|
949 |
|
|
transFramePtr = (Tcl_CallFrame*)
|
950 |
|
|
Itcl_GetStackValue(&info->transparentFrames, i);
|
951 |
|
|
|
952 |
|
|
if (framePtr == transFramePtr) {
|
953 |
|
|
transparent = 1;
|
954 |
|
|
break;
|
955 |
|
|
}
|
956 |
|
|
}
|
957 |
|
|
|
958 |
|
|
if (transparent) {
|
959 |
|
|
framePtr = _Tcl_GetCallFrame(interp, 1);
|
960 |
|
|
oldFramePtr = _Tcl_ActivateCallFrame(interp, framePtr);
|
961 |
|
|
}
|
962 |
|
|
|
963 |
|
|
if (Itcl_PushContext(interp, member, member->classDefn, contextObj,
|
964 |
|
|
&context) != TCL_OK) {
|
965 |
|
|
|
966 |
|
|
return TCL_ERROR;
|
967 |
|
|
}
|
968 |
|
|
|
969 |
|
|
/*
|
970 |
|
|
* If this is a method with a Tcl implementation, or a
|
971 |
|
|
* constructor with initCode, then parse its arguments now.
|
972 |
|
|
*/
|
973 |
|
|
if (mfunc && objc > 0) {
|
974 |
|
|
if ((mcode->flags & ITCL_IMPLEMENT_TCL) != 0 ||
|
975 |
|
|
( (member->flags & ITCL_CONSTRUCTOR) != 0 &&
|
976 |
|
|
(member->classDefn->initCode != NULL) ) ) {
|
977 |
|
|
|
978 |
|
|
if (Itcl_AssignArgs(interp, objc, objv, mfunc) != TCL_OK) {
|
979 |
|
|
result = TCL_ERROR;
|
980 |
|
|
goto evalMemberCodeDone;
|
981 |
|
|
}
|
982 |
|
|
}
|
983 |
|
|
}
|
984 |
|
|
|
985 |
|
|
/*
|
986 |
|
|
* If this code is a constructor, and if it is being invoked
|
987 |
|
|
* when an object is first constructed (i.e., the "constructed"
|
988 |
|
|
* table is still active within the object), then handle the
|
989 |
|
|
* "initCode" associated with the constructor and make sure that
|
990 |
|
|
* all base classes are properly constructed.
|
991 |
|
|
*
|
992 |
|
|
* TRICKY NOTE:
|
993 |
|
|
* The "initCode" must be executed here. This is the only
|
994 |
|
|
* opportunity where the arguments of the constructor are
|
995 |
|
|
* available in a call frame.
|
996 |
|
|
*/
|
997 |
|
|
if ((member->flags & ITCL_CONSTRUCTOR) && contextObj &&
|
998 |
|
|
contextObj->constructed) {
|
999 |
|
|
|
1000 |
|
|
result = Itcl_ConstructBase(interp, contextObj, member->classDefn);
|
1001 |
|
|
|
1002 |
|
|
if (result != TCL_OK) {
|
1003 |
|
|
goto evalMemberCodeDone;
|
1004 |
|
|
}
|
1005 |
|
|
}
|
1006 |
|
|
|
1007 |
|
|
/*
|
1008 |
|
|
* Execute the code body...
|
1009 |
|
|
*/
|
1010 |
|
|
if ((mcode->flags & ITCL_IMPLEMENT_OBJCMD) != 0) {
|
1011 |
|
|
result = (*mcode->cfunc.objCmd)(mcode->clientData,
|
1012 |
|
|
interp, objc, objv);
|
1013 |
|
|
}
|
1014 |
|
|
else if ((mcode->flags & ITCL_IMPLEMENT_ARGCMD) != 0) {
|
1015 |
|
|
char **argv;
|
1016 |
|
|
argv = (char**)ckalloc( (unsigned)(objc*sizeof(char*)) );
|
1017 |
|
|
for (i=0; i < objc; i++) {
|
1018 |
|
|
argv[i] = Tcl_GetStringFromObj(objv[i], (int*)NULL);
|
1019 |
|
|
}
|
1020 |
|
|
|
1021 |
|
|
result = (*mcode->cfunc.argCmd)(mcode->clientData,
|
1022 |
|
|
interp, objc, argv);
|
1023 |
|
|
|
1024 |
|
|
ckfree((char*)argv);
|
1025 |
|
|
}
|
1026 |
|
|
else if ((mcode->flags & ITCL_IMPLEMENT_TCL) != 0) {
|
1027 |
|
|
/* CYGNUS LOCAL - Fix for Tcl8.1 */
|
1028 |
|
|
#if TCL_MAJOR_VERSION == 8 && TCL_MINOR_VERSION == 0
|
1029 |
|
|
result = Tcl_EvalObj(interp, mcode->procPtr->bodyPtr);
|
1030 |
|
|
#else
|
1031 |
|
|
result = Tcl_EvalObj(interp, mcode->procPtr->bodyPtr, 0);
|
1032 |
|
|
#endif
|
1033 |
|
|
/* END CYGNUS LOCAL */
|
1034 |
|
|
}
|
1035 |
|
|
else {
|
1036 |
|
|
panic("itcl: bad implementation flag for %s", member->fullname);
|
1037 |
|
|
}
|
1038 |
|
|
|
1039 |
|
|
/*
|
1040 |
|
|
* If this is a constructor or destructor, and if it is being
|
1041 |
|
|
* invoked at the appropriate time, keep track of which methods
|
1042 |
|
|
* have been called. This information is used to implicitly
|
1043 |
|
|
* invoke constructors/destructors as needed.
|
1044 |
|
|
*/
|
1045 |
|
|
if ((member->flags & ITCL_DESTRUCTOR) && contextObj &&
|
1046 |
|
|
contextObj->destructed) {
|
1047 |
|
|
|
1048 |
|
|
Tcl_CreateHashEntry(contextObj->destructed,
|
1049 |
|
|
member->classDefn->name, &newEntry);
|
1050 |
|
|
}
|
1051 |
|
|
if ((member->flags & ITCL_CONSTRUCTOR) && contextObj &&
|
1052 |
|
|
contextObj->constructed) {
|
1053 |
|
|
|
1054 |
|
|
Tcl_CreateHashEntry(contextObj->constructed,
|
1055 |
|
|
member->classDefn->name, &newEntry);
|
1056 |
|
|
}
|
1057 |
|
|
|
1058 |
|
|
evalMemberCodeDone:
|
1059 |
|
|
Itcl_PopContext(interp, &context);
|
1060 |
|
|
|
1061 |
|
|
if (transparent) {
|
1062 |
|
|
(void) _Tcl_ActivateCallFrame(interp, oldFramePtr);
|
1063 |
|
|
}
|
1064 |
|
|
Itcl_ReleaseData((ClientData)mcode);
|
1065 |
|
|
|
1066 |
|
|
return result;
|
1067 |
|
|
}
|
1068 |
|
|
|
1069 |
|
|
|
1070 |
|
|
/*
|
1071 |
|
|
* ------------------------------------------------------------------------
|
1072 |
|
|
* Itcl_CreateArgList()
|
1073 |
|
|
*
|
1074 |
|
|
* Parses a Tcl list representing an argument declaration and returns
|
1075 |
|
|
* a linked list of CompiledLocal values. Usually invoked as part
|
1076 |
|
|
* of Itcl_CreateMemberFunc() when a new method or procedure is being
|
1077 |
|
|
* defined.
|
1078 |
|
|
* ------------------------------------------------------------------------
|
1079 |
|
|
*/
|
1080 |
|
|
int
|
1081 |
|
|
Itcl_CreateArgList(interp, decl, argcPtr, argPtr)
|
1082 |
|
|
Tcl_Interp* interp; /* interpreter managing this function */
|
1083 |
|
|
char* decl; /* string representing argument list */
|
1084 |
|
|
int* argcPtr; /* returns number of args in argument list */
|
1085 |
|
|
CompiledLocal** argPtr; /* returns pointer to parsed argument list */
|
1086 |
|
|
{
|
1087 |
|
|
int status = TCL_OK; /* assume that this will succeed */
|
1088 |
|
|
|
1089 |
|
|
int i, argc, fargc;
|
1090 |
|
|
char **argv, **fargv;
|
1091 |
|
|
CompiledLocal *localPtr, *last;
|
1092 |
|
|
|
1093 |
|
|
*argPtr = last = NULL;
|
1094 |
|
|
*argcPtr = 0;
|
1095 |
|
|
|
1096 |
|
|
if (decl) {
|
1097 |
|
|
if (Tcl_SplitList(interp, decl, &argc, &argv) != TCL_OK) {
|
1098 |
|
|
return TCL_ERROR;
|
1099 |
|
|
}
|
1100 |
|
|
|
1101 |
|
|
for (i=0; i < argc && status == TCL_OK; i++) {
|
1102 |
|
|
if (Tcl_SplitList(interp, argv[i], &fargc, &fargv) != TCL_OK) {
|
1103 |
|
|
status = TCL_ERROR;
|
1104 |
|
|
}
|
1105 |
|
|
else {
|
1106 |
|
|
localPtr = NULL;
|
1107 |
|
|
|
1108 |
|
|
if (fargc == 0 || *fargv[0] == '\0') {
|
1109 |
|
|
char mesg[100];
|
1110 |
|
|
sprintf(mesg, "argument #%d has no name", i);
|
1111 |
|
|
Tcl_SetResult(interp, mesg, TCL_VOLATILE);
|
1112 |
|
|
status = TCL_ERROR;
|
1113 |
|
|
}
|
1114 |
|
|
else if (fargc > 2) {
|
1115 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1116 |
|
|
"too many fields in argument specifier \"",
|
1117 |
|
|
argv[i], "\"",
|
1118 |
|
|
(char*)NULL);
|
1119 |
|
|
status = TCL_ERROR;
|
1120 |
|
|
}
|
1121 |
|
|
else if (strstr(fargv[0],"::")) {
|
1122 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1123 |
|
|
"bad argument name \"", fargv[0], "\"",
|
1124 |
|
|
(char*)NULL);
|
1125 |
|
|
status = TCL_ERROR;
|
1126 |
|
|
}
|
1127 |
|
|
else if (fargc == 1) {
|
1128 |
|
|
localPtr = Itcl_CreateArg(fargv[0], (char*)NULL);
|
1129 |
|
|
}
|
1130 |
|
|
else {
|
1131 |
|
|
localPtr = Itcl_CreateArg(fargv[0], fargv[1]);
|
1132 |
|
|
}
|
1133 |
|
|
|
1134 |
|
|
if (localPtr) {
|
1135 |
|
|
localPtr->frameIndex = i;
|
1136 |
|
|
|
1137 |
|
|
if (*argPtr == NULL) {
|
1138 |
|
|
*argPtr = last = localPtr;
|
1139 |
|
|
}
|
1140 |
|
|
else {
|
1141 |
|
|
last->nextPtr = localPtr;
|
1142 |
|
|
last = localPtr;
|
1143 |
|
|
}
|
1144 |
|
|
}
|
1145 |
|
|
}
|
1146 |
|
|
ckfree((char*)fargv);
|
1147 |
|
|
}
|
1148 |
|
|
ckfree((char*)argv);
|
1149 |
|
|
}
|
1150 |
|
|
|
1151 |
|
|
/*
|
1152 |
|
|
* If anything went wrong, destroy whatever arguments were
|
1153 |
|
|
* created and return an error.
|
1154 |
|
|
*/
|
1155 |
|
|
if (status == TCL_OK) {
|
1156 |
|
|
*argcPtr = argc;
|
1157 |
|
|
} else {
|
1158 |
|
|
Itcl_DeleteArgList(*argPtr);
|
1159 |
|
|
*argPtr = NULL;
|
1160 |
|
|
}
|
1161 |
|
|
return status;
|
1162 |
|
|
}
|
1163 |
|
|
|
1164 |
|
|
|
1165 |
|
|
/*
|
1166 |
|
|
* ------------------------------------------------------------------------
|
1167 |
|
|
* Itcl_CreateArg()
|
1168 |
|
|
*
|
1169 |
|
|
* Creates a new Tcl Arg structure and fills it with the given
|
1170 |
|
|
* information. Returns a pointer to the new Arg structure.
|
1171 |
|
|
* ------------------------------------------------------------------------
|
1172 |
|
|
*/
|
1173 |
|
|
CompiledLocal*
|
1174 |
|
|
Itcl_CreateArg(name, init)
|
1175 |
|
|
char* name; /* name of new argument */
|
1176 |
|
|
char* init; /* initial value */
|
1177 |
|
|
{
|
1178 |
|
|
CompiledLocal *localPtr = NULL;
|
1179 |
|
|
int nameLen;
|
1180 |
|
|
|
1181 |
|
|
if (name == NULL) {
|
1182 |
|
|
name = "";
|
1183 |
|
|
}
|
1184 |
|
|
nameLen = strlen(name);
|
1185 |
|
|
|
1186 |
|
|
localPtr = (CompiledLocal*)ckalloc(
|
1187 |
|
|
(unsigned)(sizeof(CompiledLocal)-sizeof(localPtr->name) + nameLen+1)
|
1188 |
|
|
);
|
1189 |
|
|
|
1190 |
|
|
localPtr->nextPtr = NULL;
|
1191 |
|
|
localPtr->nameLength = nameLen;
|
1192 |
|
|
localPtr->frameIndex = 0; /* set this later */
|
1193 |
|
|
localPtr->flags = VAR_SCALAR | VAR_ARGUMENT;
|
1194 |
|
|
localPtr->resolveInfo = NULL;
|
1195 |
|
|
|
1196 |
|
|
if (init != NULL) {
|
1197 |
|
|
localPtr->defValuePtr = Tcl_NewStringObj(init, -1);
|
1198 |
|
|
Tcl_IncrRefCount(localPtr->defValuePtr);
|
1199 |
|
|
} else {
|
1200 |
|
|
localPtr->defValuePtr = NULL;
|
1201 |
|
|
}
|
1202 |
|
|
|
1203 |
|
|
strcpy(localPtr->name, name);
|
1204 |
|
|
|
1205 |
|
|
return localPtr;
|
1206 |
|
|
}
|
1207 |
|
|
|
1208 |
|
|
/*
|
1209 |
|
|
* ------------------------------------------------------------------------
|
1210 |
|
|
* Itcl_DeleteArgList()
|
1211 |
|
|
*
|
1212 |
|
|
* Destroys a chain of arguments acting as an argument list. Usually
|
1213 |
|
|
* invoked when a method/proc is being destroyed, to discard its
|
1214 |
|
|
* argument list.
|
1215 |
|
|
* ------------------------------------------------------------------------
|
1216 |
|
|
*/
|
1217 |
|
|
void
|
1218 |
|
|
Itcl_DeleteArgList(arglist)
|
1219 |
|
|
CompiledLocal *arglist; /* first argument in arg list chain */
|
1220 |
|
|
{
|
1221 |
|
|
CompiledLocal *localPtr, *next;
|
1222 |
|
|
|
1223 |
|
|
for (localPtr=arglist; localPtr; localPtr=next) {
|
1224 |
|
|
if (localPtr->defValuePtr != NULL) {
|
1225 |
|
|
Tcl_DecrRefCount(localPtr->defValuePtr);
|
1226 |
|
|
}
|
1227 |
|
|
if (localPtr->resolveInfo) {
|
1228 |
|
|
if (localPtr->resolveInfo->deleteProc) {
|
1229 |
|
|
localPtr->resolveInfo->deleteProc(localPtr->resolveInfo);
|
1230 |
|
|
} else {
|
1231 |
|
|
ckfree((char*)localPtr->resolveInfo);
|
1232 |
|
|
}
|
1233 |
|
|
localPtr->resolveInfo = NULL;
|
1234 |
|
|
}
|
1235 |
|
|
next = localPtr->nextPtr;
|
1236 |
|
|
ckfree((char*)localPtr);
|
1237 |
|
|
}
|
1238 |
|
|
}
|
1239 |
|
|
|
1240 |
|
|
/*
|
1241 |
|
|
* ------------------------------------------------------------------------
|
1242 |
|
|
* Itcl_ArgList()
|
1243 |
|
|
*
|
1244 |
|
|
* Returns a Tcl_Obj containing the string representation for the
|
1245 |
|
|
* given argument list. This object has a reference count of 1.
|
1246 |
|
|
* The reference count should be decremented when the string is no
|
1247 |
|
|
* longer needed, and it will free itself.
|
1248 |
|
|
* ------------------------------------------------------------------------
|
1249 |
|
|
*/
|
1250 |
|
|
Tcl_Obj*
|
1251 |
|
|
Itcl_ArgList(argc, arglist)
|
1252 |
|
|
int argc; /* number of arguments */
|
1253 |
|
|
CompiledLocal* arglist; /* first argument in arglist */
|
1254 |
|
|
{
|
1255 |
|
|
char *val;
|
1256 |
|
|
Tcl_Obj *objPtr;
|
1257 |
|
|
Tcl_DString buffer;
|
1258 |
|
|
|
1259 |
|
|
Tcl_DStringInit(&buffer);
|
1260 |
|
|
|
1261 |
|
|
while (arglist && argc-- > 0) {
|
1262 |
|
|
if (arglist->defValuePtr) {
|
1263 |
|
|
val = Tcl_GetStringFromObj(arglist->defValuePtr, (int*)NULL);
|
1264 |
|
|
Tcl_DStringStartSublist(&buffer);
|
1265 |
|
|
Tcl_DStringAppendElement(&buffer, arglist->name);
|
1266 |
|
|
Tcl_DStringAppendElement(&buffer, val);
|
1267 |
|
|
Tcl_DStringEndSublist(&buffer);
|
1268 |
|
|
}
|
1269 |
|
|
else {
|
1270 |
|
|
Tcl_DStringAppendElement(&buffer, arglist->name);
|
1271 |
|
|
}
|
1272 |
|
|
arglist = arglist->nextPtr;
|
1273 |
|
|
}
|
1274 |
|
|
|
1275 |
|
|
objPtr = Tcl_NewStringObj(Tcl_DStringValue(&buffer),
|
1276 |
|
|
Tcl_DStringLength(&buffer));
|
1277 |
|
|
|
1278 |
|
|
Tcl_DStringFree(&buffer);
|
1279 |
|
|
|
1280 |
|
|
return objPtr;
|
1281 |
|
|
}
|
1282 |
|
|
|
1283 |
|
|
|
1284 |
|
|
/*
|
1285 |
|
|
* ------------------------------------------------------------------------
|
1286 |
|
|
* Itcl_EquivArgLists()
|
1287 |
|
|
*
|
1288 |
|
|
* Compares two argument lists to see if they are equivalent. The
|
1289 |
|
|
* first list is treated as a prototype, and the second list must
|
1290 |
|
|
* match it. Argument names may be different, but they must match in
|
1291 |
|
|
* meaning. If one argument is optional, the corresponding argument
|
1292 |
|
|
* must also be optional. If the prototype list ends with the magic
|
1293 |
|
|
* "args" argument, then it matches everything in the other list.
|
1294 |
|
|
*
|
1295 |
|
|
* Returns non-zero if the argument lists are equivalent.
|
1296 |
|
|
* ------------------------------------------------------------------------
|
1297 |
|
|
*/
|
1298 |
|
|
int
|
1299 |
|
|
Itcl_EquivArgLists(arg1, arg1c, arg2, arg2c)
|
1300 |
|
|
CompiledLocal* arg1; /* prototype argument list */
|
1301 |
|
|
int arg1c; /* number of args in prototype arg list */
|
1302 |
|
|
CompiledLocal* arg2; /* another argument list to match against */
|
1303 |
|
|
int arg2c; /* number of args in matching list */
|
1304 |
|
|
{
|
1305 |
|
|
char *dval1, *dval2;
|
1306 |
|
|
|
1307 |
|
|
while (arg1 && arg1c > 0 && arg2 && arg2c > 0) {
|
1308 |
|
|
/*
|
1309 |
|
|
* If the prototype argument list ends with the magic "args"
|
1310 |
|
|
* argument, then it matches everything in the other list.
|
1311 |
|
|
*/
|
1312 |
|
|
if (arg1c == 1 && strcmp(arg1->name,"args") == 0) {
|
1313 |
|
|
return 1;
|
1314 |
|
|
}
|
1315 |
|
|
|
1316 |
|
|
/*
|
1317 |
|
|
* If one has a default value, then the other must have the
|
1318 |
|
|
* same default value.
|
1319 |
|
|
*/
|
1320 |
|
|
if (arg1->defValuePtr) {
|
1321 |
|
|
if (arg2->defValuePtr == NULL) {
|
1322 |
|
|
return 0;
|
1323 |
|
|
}
|
1324 |
|
|
|
1325 |
|
|
dval1 = Tcl_GetStringFromObj(arg1->defValuePtr, (int*)NULL);
|
1326 |
|
|
dval2 = Tcl_GetStringFromObj(arg2->defValuePtr, (int*)NULL);
|
1327 |
|
|
if (strcmp(dval1, dval2) != 0) {
|
1328 |
|
|
return 0;
|
1329 |
|
|
}
|
1330 |
|
|
}
|
1331 |
|
|
else if (arg2->defValuePtr) {
|
1332 |
|
|
return 0;
|
1333 |
|
|
}
|
1334 |
|
|
|
1335 |
|
|
arg1 = arg1->nextPtr; arg1c--;
|
1336 |
|
|
arg2 = arg2->nextPtr; arg2c--;
|
1337 |
|
|
}
|
1338 |
|
|
if (arg1c == 1 && strcmp(arg1->name,"args") == 0) {
|
1339 |
|
|
return 1;
|
1340 |
|
|
}
|
1341 |
|
|
return (arg1c == 0 && arg2c == 0);
|
1342 |
|
|
}
|
1343 |
|
|
|
1344 |
|
|
|
1345 |
|
|
/*
|
1346 |
|
|
* ------------------------------------------------------------------------
|
1347 |
|
|
* Itcl_GetMemberFuncUsage()
|
1348 |
|
|
*
|
1349 |
|
|
* Returns a string showing how a command member should be invoked.
|
1350 |
|
|
* If the command member is a method, then the specified object name
|
1351 |
|
|
* is reported as part of the invocation path:
|
1352 |
|
|
*
|
1353 |
|
|
* obj method arg ?arg arg ...?
|
1354 |
|
|
*
|
1355 |
|
|
* Otherwise, the "obj" pointer is ignored, and the class name is
|
1356 |
|
|
* used as the invocation path:
|
1357 |
|
|
*
|
1358 |
|
|
* class::proc arg ?arg arg ...?
|
1359 |
|
|
*
|
1360 |
|
|
* Returns the string by appending it onto the Tcl_Obj passed in as
|
1361 |
|
|
* an argument.
|
1362 |
|
|
* ------------------------------------------------------------------------
|
1363 |
|
|
*/
|
1364 |
|
|
void
|
1365 |
|
|
Itcl_GetMemberFuncUsage(mfunc, contextObj, objPtr)
|
1366 |
|
|
ItclMemberFunc *mfunc; /* command member being examined */
|
1367 |
|
|
ItclObject *contextObj; /* invoked with respect to this object */
|
1368 |
|
|
Tcl_Obj *objPtr; /* returns: string showing usage */
|
1369 |
|
|
{
|
1370 |
|
|
int argcount;
|
1371 |
|
|
char *name;
|
1372 |
|
|
CompiledLocal *arglist, *argPtr;
|
1373 |
|
|
Tcl_HashEntry *entry;
|
1374 |
|
|
ItclMemberFunc *mf;
|
1375 |
|
|
ItclClass *cdefnPtr;
|
1376 |
|
|
|
1377 |
|
|
/*
|
1378 |
|
|
* If the command is a method and an object context was
|
1379 |
|
|
* specified, then add the object context. If the method
|
1380 |
|
|
* was a constructor, and if the object is being created,
|
1381 |
|
|
* then report the invocation via the class creation command.
|
1382 |
|
|
*/
|
1383 |
|
|
if ((mfunc->member->flags & ITCL_COMMON) == 0) {
|
1384 |
|
|
if ((mfunc->member->flags & ITCL_CONSTRUCTOR) != 0 &&
|
1385 |
|
|
contextObj->constructed) {
|
1386 |
|
|
|
1387 |
|
|
cdefnPtr = (ItclClass*)contextObj->classDefn;
|
1388 |
|
|
mf = NULL;
|
1389 |
|
|
entry = Tcl_FindHashEntry(&cdefnPtr->resolveCmds, "constructor");
|
1390 |
|
|
if (entry) {
|
1391 |
|
|
mf = (ItclMemberFunc*)Tcl_GetHashValue(entry);
|
1392 |
|
|
}
|
1393 |
|
|
|
1394 |
|
|
if (mf == mfunc) {
|
1395 |
|
|
Tcl_GetCommandFullName(contextObj->classDefn->interp,
|
1396 |
|
|
contextObj->classDefn->accessCmd, objPtr);
|
1397 |
|
|
Tcl_AppendToObj(objPtr, " ", -1);
|
1398 |
|
|
name = Tcl_GetCommandName(contextObj->classDefn->interp,
|
1399 |
|
|
contextObj->accessCmd);
|
1400 |
|
|
Tcl_AppendToObj(objPtr, name, -1);
|
1401 |
|
|
} else {
|
1402 |
|
|
Tcl_AppendToObj(objPtr, mfunc->member->fullname, -1);
|
1403 |
|
|
}
|
1404 |
|
|
}
|
1405 |
|
|
else if (contextObj && contextObj->accessCmd) {
|
1406 |
|
|
name = Tcl_GetCommandName(contextObj->classDefn->interp,
|
1407 |
|
|
contextObj->accessCmd);
|
1408 |
|
|
Tcl_AppendStringsToObj(objPtr, name, " ", mfunc->member->name,
|
1409 |
|
|
(char*)NULL);
|
1410 |
|
|
}
|
1411 |
|
|
else {
|
1412 |
|
|
Tcl_AppendStringsToObj(objPtr, "<object> ", mfunc->member->name,
|
1413 |
|
|
(char*)NULL);
|
1414 |
|
|
}
|
1415 |
|
|
}
|
1416 |
|
|
else {
|
1417 |
|
|
Tcl_AppendToObj(objPtr, mfunc->member->fullname, -1);
|
1418 |
|
|
}
|
1419 |
|
|
|
1420 |
|
|
/*
|
1421 |
|
|
* Add the argument usage info.
|
1422 |
|
|
*/
|
1423 |
|
|
if (mfunc->member->code) {
|
1424 |
|
|
arglist = mfunc->member->code->arglist;
|
1425 |
|
|
argcount = mfunc->member->code->argcount;
|
1426 |
|
|
} else if (mfunc->arglist) {
|
1427 |
|
|
arglist = mfunc->arglist;
|
1428 |
|
|
argcount = mfunc->argcount;
|
1429 |
|
|
} else {
|
1430 |
|
|
arglist = NULL;
|
1431 |
|
|
argcount = 0;
|
1432 |
|
|
}
|
1433 |
|
|
|
1434 |
|
|
if (arglist) {
|
1435 |
|
|
for (argPtr=arglist;
|
1436 |
|
|
argPtr && argcount > 0;
|
1437 |
|
|
argPtr=argPtr->nextPtr, argcount--) {
|
1438 |
|
|
|
1439 |
|
|
if (argcount == 1 && strcmp(argPtr->name, "args") == 0) {
|
1440 |
|
|
Tcl_AppendToObj(objPtr, " ?arg arg ...?", -1);
|
1441 |
|
|
}
|
1442 |
|
|
else if (argPtr->defValuePtr) {
|
1443 |
|
|
Tcl_AppendStringsToObj(objPtr, " ?", argPtr->name, "?",
|
1444 |
|
|
(char*)NULL);
|
1445 |
|
|
}
|
1446 |
|
|
else {
|
1447 |
|
|
Tcl_AppendStringsToObj(objPtr, " ", argPtr->name,
|
1448 |
|
|
(char*)NULL);
|
1449 |
|
|
}
|
1450 |
|
|
}
|
1451 |
|
|
}
|
1452 |
|
|
}
|
1453 |
|
|
|
1454 |
|
|
|
1455 |
|
|
/*
|
1456 |
|
|
* ------------------------------------------------------------------------
|
1457 |
|
|
* Itcl_ExecMethod()
|
1458 |
|
|
*
|
1459 |
|
|
* Invoked by Tcl to handle the execution of a user-defined method.
|
1460 |
|
|
* A method is similar to the usual Tcl proc, but has access to
|
1461 |
|
|
* object-specific data. If for some reason there is no current
|
1462 |
|
|
* object context, then a method call is inappropriate, and an error
|
1463 |
|
|
* is returned.
|
1464 |
|
|
*
|
1465 |
|
|
* Methods are implemented either as Tcl code fragments, or as C-coded
|
1466 |
|
|
* procedures. For Tcl code fragments, command arguments are parsed
|
1467 |
|
|
* according to the argument list, and the body is executed in the
|
1468 |
|
|
* scope of the class where it was defined. For C procedures, the
|
1469 |
|
|
* arguments are passed in "as-is", and the procedure is executed in
|
1470 |
|
|
* the most-specific class scope.
|
1471 |
|
|
* ------------------------------------------------------------------------
|
1472 |
|
|
*/
|
1473 |
|
|
int
|
1474 |
|
|
Itcl_ExecMethod(clientData, interp, objc, objv)
|
1475 |
|
|
ClientData clientData; /* method definition */
|
1476 |
|
|
Tcl_Interp *interp; /* current interpreter */
|
1477 |
|
|
int objc; /* number of arguments */
|
1478 |
|
|
Tcl_Obj *CONST objv[]; /* argument objects */
|
1479 |
|
|
{
|
1480 |
|
|
ItclMemberFunc *mfunc = (ItclMemberFunc*)clientData;
|
1481 |
|
|
ItclMember *member = mfunc->member;
|
1482 |
|
|
int result = TCL_OK;
|
1483 |
|
|
|
1484 |
|
|
char *token;
|
1485 |
|
|
Tcl_HashEntry *entry;
|
1486 |
|
|
ItclClass *contextClass;
|
1487 |
|
|
ItclObject *contextObj;
|
1488 |
|
|
|
1489 |
|
|
/*
|
1490 |
|
|
* Make sure that the current namespace context includes an
|
1491 |
|
|
* object that is being manipulated. Methods can be executed
|
1492 |
|
|
* only if an object context exists.
|
1493 |
|
|
*/
|
1494 |
|
|
if (Itcl_GetContext(interp, &contextClass, &contextObj) != TCL_OK) {
|
1495 |
|
|
return TCL_ERROR;
|
1496 |
|
|
}
|
1497 |
|
|
if (contextObj == NULL) {
|
1498 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1499 |
|
|
"cannot access object-specific info without an object context",
|
1500 |
|
|
(char*)NULL);
|
1501 |
|
|
return TCL_ERROR;
|
1502 |
|
|
}
|
1503 |
|
|
|
1504 |
|
|
/*
|
1505 |
|
|
* Make sure that this command member can be accessed from
|
1506 |
|
|
* the current namespace context.
|
1507 |
|
|
*/
|
1508 |
|
|
if (mfunc->member->protection != ITCL_PUBLIC) {
|
1509 |
|
|
Tcl_Namespace *contextNs = Itcl_GetTrueNamespace(interp,
|
1510 |
|
|
contextClass->info);
|
1511 |
|
|
|
1512 |
|
|
if (!Itcl_CanAccessFunc(mfunc, contextNs)) {
|
1513 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1514 |
|
|
"can't access \"", member->fullname, "\": ",
|
1515 |
|
|
Itcl_ProtectionStr(member->protection), " function",
|
1516 |
|
|
(char*)NULL);
|
1517 |
|
|
return TCL_ERROR;
|
1518 |
|
|
}
|
1519 |
|
|
}
|
1520 |
|
|
|
1521 |
|
|
/*
|
1522 |
|
|
* All methods should be "virtual" unless they are invoked with
|
1523 |
|
|
* a "::" scope qualifier.
|
1524 |
|
|
*
|
1525 |
|
|
* To implement the "virtual" behavior, find the most-specific
|
1526 |
|
|
* implementation for the method by looking in the "resolveCmds"
|
1527 |
|
|
* table for this class.
|
1528 |
|
|
*/
|
1529 |
|
|
token = Tcl_GetStringFromObj(objv[0], (int*)NULL);
|
1530 |
|
|
if (strstr(token, "::") == NULL) {
|
1531 |
|
|
entry = Tcl_FindHashEntry(&contextObj->classDefn->resolveCmds,
|
1532 |
|
|
member->name);
|
1533 |
|
|
|
1534 |
|
|
if (entry) {
|
1535 |
|
|
mfunc = (ItclMemberFunc*)Tcl_GetHashValue(entry);
|
1536 |
|
|
member = mfunc->member;
|
1537 |
|
|
}
|
1538 |
|
|
}
|
1539 |
|
|
|
1540 |
|
|
/*
|
1541 |
|
|
* Execute the code for the method. Be careful to protect
|
1542 |
|
|
* the method in case it gets deleted during execution.
|
1543 |
|
|
*/
|
1544 |
|
|
Itcl_PreserveData((ClientData)mfunc);
|
1545 |
|
|
|
1546 |
|
|
result = Itcl_EvalMemberCode(interp, mfunc, member, contextObj,
|
1547 |
|
|
objc, objv);
|
1548 |
|
|
|
1549 |
|
|
result = Itcl_ReportFuncErrors(interp, mfunc, contextObj, result);
|
1550 |
|
|
|
1551 |
|
|
Itcl_ReleaseData((ClientData)mfunc);
|
1552 |
|
|
|
1553 |
|
|
return result;
|
1554 |
|
|
}
|
1555 |
|
|
|
1556 |
|
|
|
1557 |
|
|
/*
|
1558 |
|
|
* ------------------------------------------------------------------------
|
1559 |
|
|
* Itcl_ExecProc()
|
1560 |
|
|
*
|
1561 |
|
|
* Invoked by Tcl to handle the execution of a user-defined proc.
|
1562 |
|
|
*
|
1563 |
|
|
* Procs are implemented either as Tcl code fragments, or as C-coded
|
1564 |
|
|
* procedures. For Tcl code fragments, command arguments are parsed
|
1565 |
|
|
* according to the argument list, and the body is executed in the
|
1566 |
|
|
* scope of the class where it was defined. For C procedures, the
|
1567 |
|
|
* arguments are passed in "as-is", and the procedure is executed in
|
1568 |
|
|
* the most-specific class scope.
|
1569 |
|
|
* ------------------------------------------------------------------------
|
1570 |
|
|
*/
|
1571 |
|
|
int
|
1572 |
|
|
Itcl_ExecProc(clientData, interp, objc, objv)
|
1573 |
|
|
ClientData clientData; /* proc definition */
|
1574 |
|
|
Tcl_Interp *interp; /* current interpreter */
|
1575 |
|
|
int objc; /* number of arguments */
|
1576 |
|
|
Tcl_Obj *CONST objv[]; /* argument objects */
|
1577 |
|
|
{
|
1578 |
|
|
ItclMemberFunc *mfunc = (ItclMemberFunc*)clientData;
|
1579 |
|
|
ItclMember *member = mfunc->member;
|
1580 |
|
|
int result = TCL_OK;
|
1581 |
|
|
|
1582 |
|
|
/*
|
1583 |
|
|
* Make sure that this command member can be accessed from
|
1584 |
|
|
* the current namespace context.
|
1585 |
|
|
*/
|
1586 |
|
|
if (mfunc->member->protection != ITCL_PUBLIC) {
|
1587 |
|
|
Tcl_Namespace *contextNs = Itcl_GetTrueNamespace(interp,
|
1588 |
|
|
mfunc->member->classDefn->info);
|
1589 |
|
|
|
1590 |
|
|
if (!Itcl_CanAccessFunc(mfunc, contextNs)) {
|
1591 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1592 |
|
|
"can't access \"", member->fullname, "\": ",
|
1593 |
|
|
Itcl_ProtectionStr(member->protection), " function",
|
1594 |
|
|
(char*)NULL);
|
1595 |
|
|
return TCL_ERROR;
|
1596 |
|
|
}
|
1597 |
|
|
}
|
1598 |
|
|
|
1599 |
|
|
/*
|
1600 |
|
|
* Execute the code for the proc. Be careful to protect
|
1601 |
|
|
* the proc in case it gets deleted during execution.
|
1602 |
|
|
*/
|
1603 |
|
|
Itcl_PreserveData((ClientData)mfunc);
|
1604 |
|
|
|
1605 |
|
|
result = Itcl_EvalMemberCode(interp, mfunc, member, (ItclObject*)NULL,
|
1606 |
|
|
objc, objv);
|
1607 |
|
|
|
1608 |
|
|
result = Itcl_ReportFuncErrors(interp, mfunc, (ItclObject*)NULL, result);
|
1609 |
|
|
|
1610 |
|
|
Itcl_ReleaseData((ClientData)mfunc);
|
1611 |
|
|
|
1612 |
|
|
return result;
|
1613 |
|
|
}
|
1614 |
|
|
|
1615 |
|
|
|
1616 |
|
|
/*
|
1617 |
|
|
* ------------------------------------------------------------------------
|
1618 |
|
|
* Itcl_PushContext()
|
1619 |
|
|
*
|
1620 |
|
|
* Sets up the class/object context so that a body of [incr Tcl]
|
1621 |
|
|
* code can be executed. This procedure pushes a call frame with
|
1622 |
|
|
* the proper namespace context for the class. If an object context
|
1623 |
|
|
* is supplied, the object's instance variables are integrated into
|
1624 |
|
|
* the call frame so they can be accessed as local variables.
|
1625 |
|
|
* ------------------------------------------------------------------------
|
1626 |
|
|
*/
|
1627 |
|
|
int
|
1628 |
|
|
Itcl_PushContext(interp, member, contextClass, contextObj, contextPtr)
|
1629 |
|
|
Tcl_Interp *interp; /* interpreter managing this body of code */
|
1630 |
|
|
ItclMember *member; /* member containing code body */
|
1631 |
|
|
ItclClass *contextClass; /* class context */
|
1632 |
|
|
ItclObject *contextObj; /* object context, or NULL */
|
1633 |
|
|
ItclContext *contextPtr; /* storage space for class/object context */
|
1634 |
|
|
{
|
1635 |
|
|
CallFrame *framePtr = &contextPtr->frame;
|
1636 |
|
|
|
1637 |
|
|
int result, localCt, newEntry;
|
1638 |
|
|
ItclMemberCode *mcode;
|
1639 |
|
|
Proc *procPtr;
|
1640 |
|
|
Tcl_HashEntry *entry;
|
1641 |
|
|
|
1642 |
|
|
/*
|
1643 |
|
|
* Activate the call frame. If this fails, we'll bail out
|
1644 |
|
|
* before allocating any resources.
|
1645 |
|
|
*
|
1646 |
|
|
* NOTE: Always push a call frame that looks like a proc.
|
1647 |
|
|
* This causes global variables to be handled properly
|
1648 |
|
|
* inside methods/procs.
|
1649 |
|
|
*/
|
1650 |
|
|
result = Tcl_PushCallFrame(interp, (Tcl_CallFrame*)framePtr,
|
1651 |
|
|
contextClass->namesp, /* isProcCallFrame */ 1);
|
1652 |
|
|
|
1653 |
|
|
if (result != TCL_OK) {
|
1654 |
|
|
return result;
|
1655 |
|
|
}
|
1656 |
|
|
|
1657 |
|
|
contextPtr->classDefn = contextClass;
|
1658 |
|
|
contextPtr->compiledLocals = &contextPtr->localStorage[0];
|
1659 |
|
|
|
1660 |
|
|
/*
|
1661 |
|
|
* If this is an object context, register it in a hash table
|
1662 |
|
|
* of all known contexts. We'll need this later if we
|
1663 |
|
|
* call Itcl_GetContext to get the object context for the
|
1664 |
|
|
* current call frame.
|
1665 |
|
|
*/
|
1666 |
|
|
if (contextObj) {
|
1667 |
|
|
entry = Tcl_CreateHashEntry(&contextClass->info->contextFrames,
|
1668 |
|
|
(char*)framePtr, &newEntry);
|
1669 |
|
|
|
1670 |
|
|
Itcl_PreserveData((ClientData)contextObj);
|
1671 |
|
|
Tcl_SetHashValue(entry, (ClientData)contextObj);
|
1672 |
|
|
}
|
1673 |
|
|
|
1674 |
|
|
/*
|
1675 |
|
|
* Set up the compiled locals in the call frame and assign
|
1676 |
|
|
* argument variables.
|
1677 |
|
|
*/
|
1678 |
|
|
if (member) {
|
1679 |
|
|
mcode = member->code;
|
1680 |
|
|
procPtr = mcode->procPtr;
|
1681 |
|
|
|
1682 |
|
|
/*
|
1683 |
|
|
* If there are too many compiled locals to fit in the default
|
1684 |
|
|
* storage space for the context, then allocate more space.
|
1685 |
|
|
*/
|
1686 |
|
|
localCt = procPtr->numCompiledLocals;
|
1687 |
|
|
if (localCt > sizeof(contextPtr->localStorage)/sizeof(Var)) {
|
1688 |
|
|
contextPtr->compiledLocals = (Var*)ckalloc(
|
1689 |
|
|
(unsigned)(localCt * sizeof(Var))
|
1690 |
|
|
);
|
1691 |
|
|
}
|
1692 |
|
|
|
1693 |
|
|
/*
|
1694 |
|
|
* Initialize and resolve compiled variable references.
|
1695 |
|
|
* Class variables will have special resolution rules.
|
1696 |
|
|
* In that case, we call their "resolver" procs to get our
|
1697 |
|
|
* hands on the variable, and we make the compiled local a
|
1698 |
|
|
* link to the real variable.
|
1699 |
|
|
*/
|
1700 |
|
|
|
1701 |
|
|
framePtr->procPtr = procPtr;
|
1702 |
|
|
framePtr->numCompiledLocals = localCt;
|
1703 |
|
|
framePtr->compiledLocals = contextPtr->compiledLocals;
|
1704 |
|
|
|
1705 |
|
|
TclInitCompiledLocals(interp, framePtr,
|
1706 |
|
|
(Namespace*)contextClass->namesp);
|
1707 |
|
|
}
|
1708 |
|
|
return result;
|
1709 |
|
|
}
|
1710 |
|
|
|
1711 |
|
|
|
1712 |
|
|
/*
|
1713 |
|
|
* ------------------------------------------------------------------------
|
1714 |
|
|
* Itcl_PopContext()
|
1715 |
|
|
*
|
1716 |
|
|
* Removes a class/object context previously set up by Itcl_PushContext.
|
1717 |
|
|
* Usually called after an [incr Tcl] code body has been executed,
|
1718 |
|
|
* to clean up.
|
1719 |
|
|
* ------------------------------------------------------------------------
|
1720 |
|
|
*/
|
1721 |
|
|
void
|
1722 |
|
|
Itcl_PopContext(interp, contextPtr)
|
1723 |
|
|
Tcl_Interp *interp; /* interpreter managing this body of code */
|
1724 |
|
|
ItclContext *contextPtr; /* storage space for class/object context */
|
1725 |
|
|
{
|
1726 |
|
|
Tcl_CallFrame *framePtr;
|
1727 |
|
|
ItclObjectInfo *info;
|
1728 |
|
|
ItclObject *contextObj;
|
1729 |
|
|
Tcl_HashEntry *entry;
|
1730 |
|
|
|
1731 |
|
|
/*
|
1732 |
|
|
* See if the current call frame has an object context
|
1733 |
|
|
* associated with it. If so, release the claim on the
|
1734 |
|
|
* object info.
|
1735 |
|
|
*/
|
1736 |
|
|
framePtr = _Tcl_GetCallFrame(interp, 0);
|
1737 |
|
|
info = contextPtr->classDefn->info;
|
1738 |
|
|
|
1739 |
|
|
entry = Tcl_FindHashEntry(&info->contextFrames, (char*)framePtr);
|
1740 |
|
|
if (entry != NULL) {
|
1741 |
|
|
contextObj = (ItclObject*)Tcl_GetHashValue(entry);
|
1742 |
|
|
Itcl_ReleaseData((ClientData)contextObj);
|
1743 |
|
|
Tcl_DeleteHashEntry(entry);
|
1744 |
|
|
}
|
1745 |
|
|
|
1746 |
|
|
/*
|
1747 |
|
|
* Remove the call frame.
|
1748 |
|
|
*/
|
1749 |
|
|
Tcl_PopCallFrame(interp);
|
1750 |
|
|
|
1751 |
|
|
/*
|
1752 |
|
|
* Free the compiledLocals array if malloc'ed storage was used.
|
1753 |
|
|
*/
|
1754 |
|
|
if (contextPtr->compiledLocals != &contextPtr->localStorage[0]) {
|
1755 |
|
|
ckfree((char*)contextPtr->compiledLocals);
|
1756 |
|
|
}
|
1757 |
|
|
}
|
1758 |
|
|
|
1759 |
|
|
|
1760 |
|
|
/*
|
1761 |
|
|
* ------------------------------------------------------------------------
|
1762 |
|
|
* Itcl_GetContext()
|
1763 |
|
|
*
|
1764 |
|
|
* Convenience routine for looking up the current object/class context.
|
1765 |
|
|
* Useful in implementing methods/procs to see what class, and perhaps
|
1766 |
|
|
* what object, is active.
|
1767 |
|
|
*
|
1768 |
|
|
* Returns TCL_OK if the current namespace is a class namespace.
|
1769 |
|
|
* Also returns pointers to the class definition, and to object
|
1770 |
|
|
* data if an object context is active. Returns TCL_ERROR (along
|
1771 |
|
|
* with an error message in the interpreter) if a class namespace
|
1772 |
|
|
* is not active.
|
1773 |
|
|
* ------------------------------------------------------------------------
|
1774 |
|
|
*/
|
1775 |
|
|
int
|
1776 |
|
|
Itcl_GetContext(interp, cdefnPtr, odefnPtr)
|
1777 |
|
|
Tcl_Interp *interp; /* current interpreter */
|
1778 |
|
|
ItclClass **cdefnPtr; /* returns: class definition or NULL */
|
1779 |
|
|
ItclObject **odefnPtr; /* returns: object data or NULL */
|
1780 |
|
|
{
|
1781 |
|
|
Tcl_Namespace *activeNs = Tcl_GetCurrentNamespace(interp);
|
1782 |
|
|
ItclObjectInfo *info;
|
1783 |
|
|
Tcl_CallFrame *framePtr;
|
1784 |
|
|
Tcl_HashEntry *entry;
|
1785 |
|
|
|
1786 |
|
|
/*
|
1787 |
|
|
* Return NULL for anything that cannot be found.
|
1788 |
|
|
*/
|
1789 |
|
|
*cdefnPtr = NULL;
|
1790 |
|
|
*odefnPtr = NULL;
|
1791 |
|
|
|
1792 |
|
|
/*
|
1793 |
|
|
* If the active namespace is a class namespace, then return
|
1794 |
|
|
* all known info. See if the current call frame is a known
|
1795 |
|
|
* object context, and if so, return that context.
|
1796 |
|
|
*/
|
1797 |
|
|
if (Itcl_IsClassNamespace(activeNs)) {
|
1798 |
|
|
*cdefnPtr = (ItclClass*)activeNs->clientData;
|
1799 |
|
|
|
1800 |
|
|
framePtr = _Tcl_GetCallFrame(interp, 0);
|
1801 |
|
|
|
1802 |
|
|
info = (*cdefnPtr)->info;
|
1803 |
|
|
entry = Tcl_FindHashEntry(&info->contextFrames, (char*)framePtr);
|
1804 |
|
|
|
1805 |
|
|
if (entry != NULL) {
|
1806 |
|
|
*odefnPtr = (ItclObject*)Tcl_GetHashValue(entry);
|
1807 |
|
|
}
|
1808 |
|
|
return TCL_OK;
|
1809 |
|
|
}
|
1810 |
|
|
|
1811 |
|
|
/*
|
1812 |
|
|
* If there is no class/object context, return an error message.
|
1813 |
|
|
*/
|
1814 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1815 |
|
|
"namespace \"", activeNs->fullName, "\" is not a class namespace",
|
1816 |
|
|
(char*)NULL);
|
1817 |
|
|
|
1818 |
|
|
return TCL_ERROR;
|
1819 |
|
|
}
|
1820 |
|
|
|
1821 |
|
|
|
1822 |
|
|
/*
|
1823 |
|
|
* ------------------------------------------------------------------------
|
1824 |
|
|
* Itcl_AssignArgs()
|
1825 |
|
|
*
|
1826 |
|
|
* Matches a list of arguments against a Tcl argument specification.
|
1827 |
|
|
* Supports all of the rules regarding arguments for Tcl procs, including
|
1828 |
|
|
* default arguments and variable-length argument lists.
|
1829 |
|
|
*
|
1830 |
|
|
* Assumes that a local call frame is already installed. As variables
|
1831 |
|
|
* are successfully matched, they are stored as variables in the call
|
1832 |
|
|
* frame. Returns TCL_OK on success, or TCL_ERROR (along with an error
|
1833 |
|
|
* message in interp->result) on error.
|
1834 |
|
|
* ------------------------------------------------------------------------
|
1835 |
|
|
*/
|
1836 |
|
|
int
|
1837 |
|
|
Itcl_AssignArgs(interp, objc, objv, mfunc)
|
1838 |
|
|
Tcl_Interp *interp; /* interpreter */
|
1839 |
|
|
int objc; /* number of arguments */
|
1840 |
|
|
Tcl_Obj *CONST objv[]; /* argument objects */
|
1841 |
|
|
ItclMemberFunc *mfunc; /* member function info (for error messages) */
|
1842 |
|
|
{
|
1843 |
|
|
ItclMemberCode *mcode = mfunc->member->code;
|
1844 |
|
|
|
1845 |
|
|
int result = TCL_OK;
|
1846 |
|
|
|
1847 |
|
|
int defargc;
|
1848 |
|
|
char **defargv = NULL;
|
1849 |
|
|
Tcl_Obj **defobjv = NULL;
|
1850 |
|
|
int configc = 0;
|
1851 |
|
|
ItclVarDefn **configVars = NULL;
|
1852 |
|
|
char **configVals = NULL;
|
1853 |
|
|
|
1854 |
|
|
int vi, argsLeft;
|
1855 |
|
|
ItclClass *contextClass;
|
1856 |
|
|
ItclObject *contextObj;
|
1857 |
|
|
CompiledLocal *argPtr;
|
1858 |
|
|
CallFrame *framePtr;
|
1859 |
|
|
Var *varPtr;
|
1860 |
|
|
Tcl_Obj *objPtr, *listPtr;
|
1861 |
|
|
char *value;
|
1862 |
|
|
|
1863 |
|
|
framePtr = (CallFrame*) _Tcl_GetCallFrame(interp, 0);
|
1864 |
|
|
framePtr->objc = objc;
|
1865 |
|
|
framePtr->objv = objv; /* ref counts for args are incremented below */
|
1866 |
|
|
|
1867 |
|
|
/*
|
1868 |
|
|
* See if there is a current object context. We may need
|
1869 |
|
|
* it later on.
|
1870 |
|
|
*/
|
1871 |
|
|
(void) Itcl_GetContext(interp, &contextClass, &contextObj);
|
1872 |
|
|
Tcl_ResetResult(interp);
|
1873 |
|
|
|
1874 |
|
|
/*
|
1875 |
|
|
* Match the actual arguments against the procedure's formal
|
1876 |
|
|
* parameters to compute local variables.
|
1877 |
|
|
*/
|
1878 |
|
|
varPtr = framePtr->compiledLocals;
|
1879 |
|
|
|
1880 |
|
|
for (argsLeft=mcode->argcount, argPtr=mcode->arglist, objv++, objc--;
|
1881 |
|
|
argsLeft > 0;
|
1882 |
|
|
argPtr=argPtr->nextPtr, argsLeft--, varPtr++, objv++, objc--)
|
1883 |
|
|
{
|
1884 |
|
|
if (!TclIsVarArgument(argPtr)) {
|
1885 |
|
|
panic("local variable %s is not argument but should be",
|
1886 |
|
|
argPtr->name);
|
1887 |
|
|
return TCL_ERROR;
|
1888 |
|
|
}
|
1889 |
|
|
if (TclIsVarTemporary(argPtr)) {
|
1890 |
|
|
panic("local variable is temporary but should be an argument");
|
1891 |
|
|
return TCL_ERROR;
|
1892 |
|
|
}
|
1893 |
|
|
|
1894 |
|
|
/*
|
1895 |
|
|
* Handle the special case of the last formal being "args".
|
1896 |
|
|
* When it occurs, assign it a list consisting of all the
|
1897 |
|
|
* remaining actual arguments.
|
1898 |
|
|
*/
|
1899 |
|
|
if ((argsLeft == 1) && (strcmp(argPtr->name, "args") == 0)) {
|
1900 |
|
|
if (objc < 0) objc = 0;
|
1901 |
|
|
|
1902 |
|
|
listPtr = Tcl_NewListObj(objc, objv);
|
1903 |
|
|
varPtr->value.objPtr = listPtr;
|
1904 |
|
|
Tcl_IncrRefCount(listPtr); /* local var is a reference */
|
1905 |
|
|
varPtr->flags &= ~VAR_UNDEFINED;
|
1906 |
|
|
objc = 0;
|
1907 |
|
|
|
1908 |
|
|
break;
|
1909 |
|
|
}
|
1910 |
|
|
|
1911 |
|
|
/*
|
1912 |
|
|
* Handle the special case of the last formal being "config".
|
1913 |
|
|
* When it occurs, treat all remaining arguments as public
|
1914 |
|
|
* variable assignments. Set the local "config" variable
|
1915 |
|
|
* to the list of public variables assigned.
|
1916 |
|
|
*/
|
1917 |
|
|
else if ( (argsLeft == 1) &&
|
1918 |
|
|
(strcmp(argPtr->name, "config") == 0) &&
|
1919 |
|
|
contextObj )
|
1920 |
|
|
{
|
1921 |
|
|
/*
|
1922 |
|
|
* If this is not an old-style method, discourage against
|
1923 |
|
|
* the use of the "config" argument.
|
1924 |
|
|
*/
|
1925 |
|
|
if ((mfunc->member->flags & ITCL_OLD_STYLE) == 0) {
|
1926 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1927 |
|
|
"\"config\" argument is an anachronism\n",
|
1928 |
|
|
"[incr Tcl] no longer supports the \"config\" argument.\n",
|
1929 |
|
|
"Instead, use the \"args\" argument and then use the\n",
|
1930 |
|
|
"built-in configure method to handle args like this:\n",
|
1931 |
|
|
" eval configure $args",
|
1932 |
|
|
(char*)NULL);
|
1933 |
|
|
result = TCL_ERROR;
|
1934 |
|
|
goto argErrors;
|
1935 |
|
|
}
|
1936 |
|
|
|
1937 |
|
|
/*
|
1938 |
|
|
* Otherwise, handle the "config" argument in the usual way...
|
1939 |
|
|
* - parse all "-name value" assignments
|
1940 |
|
|
* - set "config" argument to the list of variable names
|
1941 |
|
|
*/
|
1942 |
|
|
if (objc > 0) { /* still have some arguments left? */
|
1943 |
|
|
|
1944 |
|
|
result = ItclParseConfig(interp, objc, objv, contextObj,
|
1945 |
|
|
&configc, &configVars, &configVals);
|
1946 |
|
|
|
1947 |
|
|
if (result != TCL_OK) {
|
1948 |
|
|
goto argErrors;
|
1949 |
|
|
}
|
1950 |
|
|
|
1951 |
|
|
listPtr = Tcl_NewListObj(0, (Tcl_Obj**)NULL);
|
1952 |
|
|
for (vi=0; vi < configc; vi++) {
|
1953 |
|
|
objPtr = Tcl_NewStringObj(
|
1954 |
|
|
configVars[vi]->member->classDefn->name, -1);
|
1955 |
|
|
Tcl_AppendToObj(objPtr, "::", -1);
|
1956 |
|
|
Tcl_AppendToObj(objPtr, configVars[vi]->member->name, -1);
|
1957 |
|
|
|
1958 |
|
|
Tcl_ListObjAppendElement(interp, listPtr, objPtr);
|
1959 |
|
|
}
|
1960 |
|
|
|
1961 |
|
|
varPtr->value.objPtr = listPtr;
|
1962 |
|
|
Tcl_IncrRefCount(listPtr); /* local var is a reference */
|
1963 |
|
|
varPtr->flags &= ~VAR_UNDEFINED;
|
1964 |
|
|
|
1965 |
|
|
objc = 0; /* all remaining args handled */
|
1966 |
|
|
}
|
1967 |
|
|
|
1968 |
|
|
else if (argPtr->defValuePtr) {
|
1969 |
|
|
value = Tcl_GetStringFromObj(argPtr->defValuePtr, (int*)NULL);
|
1970 |
|
|
|
1971 |
|
|
result = Tcl_SplitList(interp, value, &defargc, &defargv);
|
1972 |
|
|
if (result != TCL_OK) {
|
1973 |
|
|
goto argErrors;
|
1974 |
|
|
}
|
1975 |
|
|
defobjv = (Tcl_Obj**)ckalloc(
|
1976 |
|
|
(unsigned)(defargc*sizeof(Tcl_Obj*))
|
1977 |
|
|
);
|
1978 |
|
|
for (vi=0; vi < defargc; vi++) {
|
1979 |
|
|
objPtr = Tcl_NewStringObj(defargv[vi], -1);
|
1980 |
|
|
Tcl_IncrRefCount(objPtr);
|
1981 |
|
|
defobjv[vi] = objPtr;
|
1982 |
|
|
}
|
1983 |
|
|
|
1984 |
|
|
result = ItclParseConfig(interp, defargc, defobjv, contextObj,
|
1985 |
|
|
&configc, &configVars, &configVals);
|
1986 |
|
|
|
1987 |
|
|
if (result != TCL_OK) {
|
1988 |
|
|
goto argErrors;
|
1989 |
|
|
}
|
1990 |
|
|
|
1991 |
|
|
listPtr = Tcl_NewListObj(0, (Tcl_Obj**)NULL);
|
1992 |
|
|
for (vi=0; vi < configc; vi++) {
|
1993 |
|
|
objPtr = Tcl_NewStringObj(
|
1994 |
|
|
configVars[vi]->member->classDefn->name, -1);
|
1995 |
|
|
Tcl_AppendToObj(objPtr, "::", -1);
|
1996 |
|
|
Tcl_AppendToObj(objPtr, configVars[vi]->member->name, -1);
|
1997 |
|
|
|
1998 |
|
|
Tcl_ListObjAppendElement(interp, listPtr, objPtr);
|
1999 |
|
|
}
|
2000 |
|
|
|
2001 |
|
|
varPtr->value.objPtr = listPtr;
|
2002 |
|
|
Tcl_IncrRefCount(listPtr); /* local var is a reference */
|
2003 |
|
|
varPtr->flags &= ~VAR_UNDEFINED;
|
2004 |
|
|
}
|
2005 |
|
|
else {
|
2006 |
|
|
objPtr = Tcl_NewStringObj("", 0);
|
2007 |
|
|
varPtr->value.objPtr = objPtr;
|
2008 |
|
|
Tcl_IncrRefCount(objPtr); /* local var is a reference */
|
2009 |
|
|
varPtr->flags &= ~VAR_UNDEFINED;
|
2010 |
|
|
}
|
2011 |
|
|
}
|
2012 |
|
|
|
2013 |
|
|
/*
|
2014 |
|
|
* Resume the usual processing of arguments...
|
2015 |
|
|
*/
|
2016 |
|
|
else if (objc > 0) { /* take next arg as value */
|
2017 |
|
|
objPtr = *objv;
|
2018 |
|
|
varPtr->value.objPtr = objPtr;
|
2019 |
|
|
varPtr->flags &= ~VAR_UNDEFINED;
|
2020 |
|
|
Tcl_IncrRefCount(objPtr); /* local var is a reference */
|
2021 |
|
|
}
|
2022 |
|
|
else if (argPtr->defValuePtr) { /* ...or use default value */
|
2023 |
|
|
objPtr = argPtr->defValuePtr;
|
2024 |
|
|
varPtr->value.objPtr = objPtr;
|
2025 |
|
|
varPtr->flags &= ~VAR_UNDEFINED;
|
2026 |
|
|
Tcl_IncrRefCount(objPtr); /* local var is a reference */
|
2027 |
|
|
}
|
2028 |
|
|
else {
|
2029 |
|
|
if (mfunc) {
|
2030 |
|
|
objPtr = Tcl_GetObjResult(interp);
|
2031 |
|
|
Tcl_AppendToObj(objPtr, "wrong # args: should be \"", -1);
|
2032 |
|
|
Itcl_GetMemberFuncUsage(mfunc, contextObj, objPtr);
|
2033 |
|
|
Tcl_AppendToObj(objPtr, "\"", -1);
|
2034 |
|
|
} else {
|
2035 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
2036 |
|
|
"no value given for parameter \"", argPtr->name, "\"",
|
2037 |
|
|
(char*)NULL);
|
2038 |
|
|
}
|
2039 |
|
|
result = TCL_ERROR;
|
2040 |
|
|
goto argErrors;
|
2041 |
|
|
}
|
2042 |
|
|
}
|
2043 |
|
|
|
2044 |
|
|
if (objc > 0) {
|
2045 |
|
|
if (mfunc) {
|
2046 |
|
|
objPtr = Tcl_GetObjResult(interp);
|
2047 |
|
|
Tcl_AppendToObj(objPtr, "wrong # args: should be \"", -1);
|
2048 |
|
|
Itcl_GetMemberFuncUsage(mfunc, contextObj, objPtr);
|
2049 |
|
|
Tcl_AppendToObj(objPtr, "\"", -1);
|
2050 |
|
|
} else {
|
2051 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
2052 |
|
|
"too many arguments",
|
2053 |
|
|
(char*)NULL);
|
2054 |
|
|
}
|
2055 |
|
|
result = TCL_ERROR;
|
2056 |
|
|
goto argErrors;
|
2057 |
|
|
}
|
2058 |
|
|
|
2059 |
|
|
/*
|
2060 |
|
|
* Handle any "config" assignments.
|
2061 |
|
|
*/
|
2062 |
|
|
if (configc > 0) {
|
2063 |
|
|
if (ItclHandleConfig(interp, configc, configVars, configVals,
|
2064 |
|
|
contextObj) != TCL_OK) {
|
2065 |
|
|
|
2066 |
|
|
result = TCL_ERROR;
|
2067 |
|
|
goto argErrors;
|
2068 |
|
|
}
|
2069 |
|
|
}
|
2070 |
|
|
|
2071 |
|
|
/*
|
2072 |
|
|
* All arguments were successfully matched.
|
2073 |
|
|
*/
|
2074 |
|
|
result = TCL_OK;
|
2075 |
|
|
|
2076 |
|
|
/*
|
2077 |
|
|
* If any errors were found, clean up and return error status.
|
2078 |
|
|
*/
|
2079 |
|
|
argErrors:
|
2080 |
|
|
if (defobjv) {
|
2081 |
|
|
for (vi=0; vi < defargc; vi++) {
|
2082 |
|
|
Tcl_DecrRefCount(defobjv[vi]);
|
2083 |
|
|
}
|
2084 |
|
|
ckfree((char*)defobjv);
|
2085 |
|
|
}
|
2086 |
|
|
if (defargv) {
|
2087 |
|
|
ckfree((char*)defargv);
|
2088 |
|
|
}
|
2089 |
|
|
if (configVars) {
|
2090 |
|
|
ckfree((char*)configVars);
|
2091 |
|
|
}
|
2092 |
|
|
if (configVals) {
|
2093 |
|
|
ckfree((char*)configVals);
|
2094 |
|
|
}
|
2095 |
|
|
return result;
|
2096 |
|
|
}
|
2097 |
|
|
|
2098 |
|
|
|
2099 |
|
|
/*
|
2100 |
|
|
* ------------------------------------------------------------------------
|
2101 |
|
|
* ItclParseConfig()
|
2102 |
|
|
*
|
2103 |
|
|
* Parses a set of arguments as "-variable value" assignments.
|
2104 |
|
|
* Interprets all variable names in the most-specific class scope,
|
2105 |
|
|
* so that an inherited method with a "config" parameter will work
|
2106 |
|
|
* correctly. Returns a list of public variable names and their
|
2107 |
|
|
* corresponding values; both lists should passed to ItclHandleConfig()
|
2108 |
|
|
* to perform assignments, and freed when no longer in use. Returns a
|
2109 |
|
|
* status TCL_OK/TCL_ERROR and returns error messages in the interpreter.
|
2110 |
|
|
* ------------------------------------------------------------------------
|
2111 |
|
|
*/
|
2112 |
|
|
static int
|
2113 |
|
|
ItclParseConfig(interp, objc, objv, contextObj, rargc, rvars, rvals)
|
2114 |
|
|
Tcl_Interp *interp; /* interpreter */
|
2115 |
|
|
int objc; /* number of arguments */
|
2116 |
|
|
Tcl_Obj *CONST objv[]; /* argument objects */
|
2117 |
|
|
ItclObject *contextObj; /* object whose public vars are being config'd */
|
2118 |
|
|
int *rargc; /* return: number of variables accessed */
|
2119 |
|
|
ItclVarDefn ***rvars; /* return: list of variables */
|
2120 |
|
|
char ***rvals; /* return: list of values */
|
2121 |
|
|
{
|
2122 |
|
|
int result = TCL_OK;
|
2123 |
|
|
ItclVarLookup *vlookup;
|
2124 |
|
|
Tcl_HashEntry *entry;
|
2125 |
|
|
char *varName, *value;
|
2126 |
|
|
|
2127 |
|
|
if (objc < 0) objc = 0;
|
2128 |
|
|
*rargc = 0;
|
2129 |
|
|
*rvars = (ItclVarDefn**)ckalloc((unsigned)(objc*sizeof(ItclVarDefn*)));
|
2130 |
|
|
*rvals = (char**)ckalloc((unsigned)(objc*sizeof(char*)));
|
2131 |
|
|
|
2132 |
|
|
while (objc-- > 0) {
|
2133 |
|
|
/*
|
2134 |
|
|
* Next argument should be "-variable"
|
2135 |
|
|
*/
|
2136 |
|
|
varName = Tcl_GetStringFromObj(*objv, (int*)NULL);
|
2137 |
|
|
if (*varName != '-') {
|
2138 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
2139 |
|
|
"syntax error in config assignment \"",
|
2140 |
|
|
varName, "\": should be \"-variable value\"",
|
2141 |
|
|
(char*)NULL);
|
2142 |
|
|
result = TCL_ERROR;
|
2143 |
|
|
break;
|
2144 |
|
|
}
|
2145 |
|
|
else if (objc-- <= 0) {
|
2146 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
2147 |
|
|
"syntax error in config assignment \"",
|
2148 |
|
|
varName, "\": should be \"-variable value\" (missing value)",
|
2149 |
|
|
(char*)NULL);
|
2150 |
|
|
result = TCL_ERROR;
|
2151 |
|
|
break;
|
2152 |
|
|
}
|
2153 |
|
|
|
2154 |
|
|
entry = Tcl_FindHashEntry(&contextObj->classDefn->resolveVars,
|
2155 |
|
|
varName+1);
|
2156 |
|
|
|
2157 |
|
|
if (entry) {
|
2158 |
|
|
vlookup = (ItclVarLookup*)Tcl_GetHashValue(entry);
|
2159 |
|
|
value = Tcl_GetStringFromObj(*(objv+1), (int*)NULL);
|
2160 |
|
|
|
2161 |
|
|
(*rvars)[*rargc] = vlookup->vdefn; /* variable definition */
|
2162 |
|
|
(*rvals)[*rargc] = value; /* config value */
|
2163 |
|
|
(*rargc)++;
|
2164 |
|
|
objv += 2;
|
2165 |
|
|
}
|
2166 |
|
|
else {
|
2167 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
2168 |
|
|
"syntax error in config assignment \"",
|
2169 |
|
|
varName, "\": unrecognized variable",
|
2170 |
|
|
(char*)NULL);
|
2171 |
|
|
result = TCL_ERROR;
|
2172 |
|
|
break;
|
2173 |
|
|
}
|
2174 |
|
|
}
|
2175 |
|
|
return result;
|
2176 |
|
|
}
|
2177 |
|
|
|
2178 |
|
|
/*
|
2179 |
|
|
* ------------------------------------------------------------------------
|
2180 |
|
|
* ItclHandleConfig()
|
2181 |
|
|
*
|
2182 |
|
|
* Handles the assignment of "config" values to public variables.
|
2183 |
|
|
* The list of assignments is parsed in ItclParseConfig(), but the
|
2184 |
|
|
* actual assignments are performed here. If the variables have any
|
2185 |
|
|
* associated "config" code, it is invoked here as well. If errors
|
2186 |
|
|
* are detected during assignment or "config" code execution, the
|
2187 |
|
|
* variable is set back to its previous value and an error is returned.
|
2188 |
|
|
*
|
2189 |
|
|
* Returns a status TCL_OK/TCL_ERROR, and returns any error messages
|
2190 |
|
|
* in the given interpreter.
|
2191 |
|
|
* ------------------------------------------------------------------------
|
2192 |
|
|
*/
|
2193 |
|
|
static int
|
2194 |
|
|
ItclHandleConfig(interp, argc, vars, vals, contextObj)
|
2195 |
|
|
Tcl_Interp *interp; /* interpreter currently in control */
|
2196 |
|
|
int argc; /* number of assignments */
|
2197 |
|
|
ItclVarDefn **vars; /* list of public variable definitions */
|
2198 |
|
|
char **vals; /* list of public variable values */
|
2199 |
|
|
ItclObject *contextObj; /* object whose public vars are being config'd */
|
2200 |
|
|
{
|
2201 |
|
|
int result = TCL_OK;
|
2202 |
|
|
|
2203 |
|
|
int i;
|
2204 |
|
|
char *val;
|
2205 |
|
|
Tcl_DString lastval;
|
2206 |
|
|
ItclContext context;
|
2207 |
|
|
Tcl_CallFrame *oldFramePtr, *uplevelFramePtr;
|
2208 |
|
|
|
2209 |
|
|
Tcl_DStringInit(&lastval);
|
2210 |
|
|
|
2211 |
|
|
/*
|
2212 |
|
|
* All "config" assignments are performed in the most-specific
|
2213 |
|
|
* class scope, so that inherited methods with "config" arguments
|
2214 |
|
|
* will work correctly.
|
2215 |
|
|
*/
|
2216 |
|
|
result = Itcl_PushContext(interp, (ItclMember*)NULL,
|
2217 |
|
|
contextObj->classDefn, contextObj, &context);
|
2218 |
|
|
|
2219 |
|
|
if (result != TCL_OK) {
|
2220 |
|
|
return TCL_ERROR;
|
2221 |
|
|
}
|
2222 |
|
|
|
2223 |
|
|
/*
|
2224 |
|
|
* Perform each assignment and execute the "config" code
|
2225 |
|
|
* associated with each variable. If any errors are encountered,
|
2226 |
|
|
* set the variable back to its previous value, and return an error.
|
2227 |
|
|
*/
|
2228 |
|
|
for (i=0; i < argc; i++) {
|
2229 |
|
|
val = Tcl_GetVar2(interp, vars[i]->member->fullname, (char*)NULL, 0);
|
2230 |
|
|
if (!val) {
|
2231 |
|
|
val = "";
|
2232 |
|
|
}
|
2233 |
|
|
Tcl_DStringSetLength(&lastval, 0);
|
2234 |
|
|
Tcl_DStringAppend(&lastval, val, -1);
|
2235 |
|
|
|
2236 |
|
|
/*
|
2237 |
|
|
* Set the variable to the specified value.
|
2238 |
|
|
*/
|
2239 |
|
|
if (!Tcl_SetVar2(interp, vars[i]->member->fullname, (char*)NULL,
|
2240 |
|
|
vals[i], 0)) {
|
2241 |
|
|
|
2242 |
|
|
char msg[256];
|
2243 |
|
|
sprintf(msg, "\n (while configuring public variable \"%.100s\")", vars[i]->member->fullname);
|
2244 |
|
|
Tcl_AddErrorInfo(interp, msg);
|
2245 |
|
|
result = TCL_ERROR;
|
2246 |
|
|
break;
|
2247 |
|
|
}
|
2248 |
|
|
|
2249 |
|
|
/*
|
2250 |
|
|
* If the variable has a "config" condition, then execute it.
|
2251 |
|
|
* If it fails, put the variable back the way it was and return
|
2252 |
|
|
* an error.
|
2253 |
|
|
*
|
2254 |
|
|
* TRICKY NOTE: Be careful to evaluate the code one level
|
2255 |
|
|
* up in the call stack, so that it's executed in the
|
2256 |
|
|
* calling context, and not in the context that we've
|
2257 |
|
|
* set up for public variable access.
|
2258 |
|
|
*/
|
2259 |
|
|
if (vars[i]->member->code) {
|
2260 |
|
|
|
2261 |
|
|
uplevelFramePtr = _Tcl_GetCallFrame(interp, 1);
|
2262 |
|
|
oldFramePtr = _Tcl_ActivateCallFrame(interp, uplevelFramePtr);
|
2263 |
|
|
|
2264 |
|
|
result = Itcl_EvalMemberCode(interp, (ItclMemberFunc*)NULL,
|
2265 |
|
|
vars[i]->member, contextObj, 0, (Tcl_Obj* CONST*)NULL);
|
2266 |
|
|
|
2267 |
|
|
(void) _Tcl_ActivateCallFrame(interp, oldFramePtr);
|
2268 |
|
|
|
2269 |
|
|
if (result != TCL_OK) {
|
2270 |
|
|
char msg[256];
|
2271 |
|
|
sprintf(msg, "\n (while configuring public variable \"%.100s\")", vars[i]->member->fullname);
|
2272 |
|
|
Tcl_AddErrorInfo(interp, msg);
|
2273 |
|
|
Tcl_SetVar2(interp, vars[i]->member->fullname, (char*)NULL,
|
2274 |
|
|
Tcl_DStringValue(&lastval), 0);
|
2275 |
|
|
break;
|
2276 |
|
|
}
|
2277 |
|
|
}
|
2278 |
|
|
}
|
2279 |
|
|
|
2280 |
|
|
/*
|
2281 |
|
|
* Clean up and return.
|
2282 |
|
|
*/
|
2283 |
|
|
Itcl_PopContext(interp, &context);
|
2284 |
|
|
Tcl_DStringFree(&lastval);
|
2285 |
|
|
|
2286 |
|
|
return result;
|
2287 |
|
|
}
|
2288 |
|
|
|
2289 |
|
|
|
2290 |
|
|
/*
|
2291 |
|
|
* ------------------------------------------------------------------------
|
2292 |
|
|
* Itcl_ConstructBase()
|
2293 |
|
|
*
|
2294 |
|
|
* Usually invoked just before executing the body of a constructor
|
2295 |
|
|
* when an object is first created. This procedure makes sure that
|
2296 |
|
|
* all base classes are properly constructed. If an "initCode" fragment
|
2297 |
|
|
* was defined with the constructor for the class, then it is invoked.
|
2298 |
|
|
* After that, the list of base classes is checked for constructors
|
2299 |
|
|
* that are defined but have not yet been invoked. Each of these is
|
2300 |
|
|
* invoked implicitly with no arguments.
|
2301 |
|
|
*
|
2302 |
|
|
* Assumes that a local call frame is already installed, and that
|
2303 |
|
|
* constructor arguments have already been matched and are sitting in
|
2304 |
|
|
* this frame. Returns TCL_OK on success; otherwise, this procedure
|
2305 |
|
|
* returns TCL_ERROR, along with an error message in the interpreter.
|
2306 |
|
|
* ------------------------------------------------------------------------
|
2307 |
|
|
*/
|
2308 |
|
|
int
|
2309 |
|
|
Itcl_ConstructBase(interp, contextObj, contextClass)
|
2310 |
|
|
Tcl_Interp *interp; /* interpreter */
|
2311 |
|
|
ItclObject *contextObj; /* object being constructed */
|
2312 |
|
|
ItclClass *contextClass; /* current class being constructed */
|
2313 |
|
|
{
|
2314 |
|
|
int result;
|
2315 |
|
|
Itcl_ListElem *elem;
|
2316 |
|
|
ItclClass *cdefn;
|
2317 |
|
|
Tcl_HashEntry *entry;
|
2318 |
|
|
|
2319 |
|
|
/*
|
2320 |
|
|
* If the class has an "initCode", invoke it in the current context.
|
2321 |
|
|
*
|
2322 |
|
|
* TRICKY NOTE:
|
2323 |
|
|
* This context is the call frame containing the arguments
|
2324 |
|
|
* for the constructor. The "initCode" makes sense right
|
2325 |
|
|
* now--just before the body of the constructor is executed.
|
2326 |
|
|
*/
|
2327 |
|
|
if (contextClass->initCode) {
|
2328 |
|
|
/* CYGNUS LOCAL - Fix for Tcl8.1 */
|
2329 |
|
|
#if TCL_MAJOR_VERSION == 8 && TCL_MINOR_VERSION == 0
|
2330 |
|
|
if (Tcl_EvalObj(interp, contextClass->initCode) != TCL_OK) {
|
2331 |
|
|
#else
|
2332 |
|
|
if (Tcl_EvalObj(interp, contextClass->initCode, 0) != TCL_OK) {
|
2333 |
|
|
#endif
|
2334 |
|
|
/* END CYGNUS LOCAL */
|
2335 |
|
|
return TCL_ERROR;
|
2336 |
|
|
}
|
2337 |
|
|
}
|
2338 |
|
|
|
2339 |
|
|
/*
|
2340 |
|
|
* Scan through the list of base classes and see if any of these
|
2341 |
|
|
* have not been constructed. Invoke base class constructors
|
2342 |
|
|
* implicitly, as needed. Go through the list of base classes
|
2343 |
|
|
* in reverse order, so that least-specific classes are constructed
|
2344 |
|
|
* first.
|
2345 |
|
|
*/
|
2346 |
|
|
elem = Itcl_LastListElem(&contextClass->bases);
|
2347 |
|
|
while (elem) {
|
2348 |
|
|
cdefn = (ItclClass*)Itcl_GetListValue(elem);
|
2349 |
|
|
|
2350 |
|
|
if (!Tcl_FindHashEntry(contextObj->constructed, cdefn->name)) {
|
2351 |
|
|
|
2352 |
|
|
result = Itcl_InvokeMethodIfExists(interp, "constructor",
|
2353 |
|
|
cdefn, contextObj, 0, (Tcl_Obj* CONST*)NULL);
|
2354 |
|
|
|
2355 |
|
|
if (result != TCL_OK) {
|
2356 |
|
|
return TCL_ERROR;
|
2357 |
|
|
}
|
2358 |
|
|
|
2359 |
|
|
/*
|
2360 |
|
|
* The base class may not have a constructor, but its
|
2361 |
|
|
* own base classes could have one. If the constructor
|
2362 |
|
|
* wasn't found in the last step, then other base classes
|
2363 |
|
|
* weren't constructed either. Make sure that all of its
|
2364 |
|
|
* base classes are properly constructed.
|
2365 |
|
|
*/
|
2366 |
|
|
entry = Tcl_FindHashEntry(&cdefn->functions, "constructor");
|
2367 |
|
|
if (entry == NULL) {
|
2368 |
|
|
result = Itcl_ConstructBase(interp, contextObj, cdefn);
|
2369 |
|
|
if (result != TCL_OK) {
|
2370 |
|
|
return TCL_ERROR;
|
2371 |
|
|
}
|
2372 |
|
|
}
|
2373 |
|
|
}
|
2374 |
|
|
elem = Itcl_PrevListElem(elem);
|
2375 |
|
|
}
|
2376 |
|
|
return TCL_OK;
|
2377 |
|
|
}
|
2378 |
|
|
|
2379 |
|
|
|
2380 |
|
|
/*
|
2381 |
|
|
* ------------------------------------------------------------------------
|
2382 |
|
|
* Itcl_InvokeMethodIfExists()
|
2383 |
|
|
*
|
2384 |
|
|
* Looks for a particular method in the specified class. If the
|
2385 |
|
|
* method is found, it is invoked with the given arguments. Any
|
2386 |
|
|
* protection level (protected/private) for the method is ignored.
|
2387 |
|
|
* If the method does not exist, this procedure does nothing.
|
2388 |
|
|
*
|
2389 |
|
|
* This procedure is used primarily to invoke the constructor/destructor
|
2390 |
|
|
* when an object is created/destroyed.
|
2391 |
|
|
*
|
2392 |
|
|
* Returns TCL_OK on success; otherwise, this procedure returns
|
2393 |
|
|
* TCL_ERROR along with an error message in the interpreter.
|
2394 |
|
|
* ------------------------------------------------------------------------
|
2395 |
|
|
*/
|
2396 |
|
|
int
|
2397 |
|
|
Itcl_InvokeMethodIfExists(interp, name, contextClass, contextObj, objc, objv)
|
2398 |
|
|
Tcl_Interp *interp; /* interpreter */
|
2399 |
|
|
char *name; /* name of desired method */
|
2400 |
|
|
ItclClass *contextClass; /* current class being constructed */
|
2401 |
|
|
ItclObject *contextObj; /* object being constructed */
|
2402 |
|
|
int objc; /* number of arguments */
|
2403 |
|
|
Tcl_Obj *CONST objv[]; /* argument objects */
|
2404 |
|
|
{
|
2405 |
|
|
int result = TCL_OK;
|
2406 |
|
|
|
2407 |
|
|
ItclMemberFunc *mfunc;
|
2408 |
|
|
ItclMember *member;
|
2409 |
|
|
Tcl_HashEntry *entry;
|
2410 |
|
|
Tcl_Obj *cmdlinePtr;
|
2411 |
|
|
int cmdlinec;
|
2412 |
|
|
Tcl_Obj **cmdlinev;
|
2413 |
|
|
|
2414 |
|
|
/*
|
2415 |
|
|
* Scan through the list of base classes and see if any of these
|
2416 |
|
|
* have not been constructed. Invoke base class constructors
|
2417 |
|
|
* implicitly, as needed. Go through the list of base classes
|
2418 |
|
|
* in reverse order, so that least-specific classes are constructed
|
2419 |
|
|
* first.
|
2420 |
|
|
*/
|
2421 |
|
|
entry = Tcl_FindHashEntry(&contextClass->functions, name);
|
2422 |
|
|
|
2423 |
|
|
if (entry) {
|
2424 |
|
|
mfunc = (ItclMemberFunc*)Tcl_GetHashValue(entry);
|
2425 |
|
|
member = mfunc->member;
|
2426 |
|
|
|
2427 |
|
|
/*
|
2428 |
|
|
* Prepend the method name to the list of arguments.
|
2429 |
|
|
*/
|
2430 |
|
|
cmdlinePtr = Itcl_CreateArgs(interp, name, objc, objv);
|
2431 |
|
|
|
2432 |
|
|
(void) Tcl_ListObjGetElements((Tcl_Interp*)NULL, cmdlinePtr,
|
2433 |
|
|
&cmdlinec, &cmdlinev);
|
2434 |
|
|
|
2435 |
|
|
/*
|
2436 |
|
|
* Execute the code for the method. Be careful to protect
|
2437 |
|
|
* the method in case it gets deleted during execution.
|
2438 |
|
|
*/
|
2439 |
|
|
Itcl_PreserveData((ClientData)mfunc);
|
2440 |
|
|
|
2441 |
|
|
result = Itcl_EvalMemberCode(interp, mfunc, member,
|
2442 |
|
|
contextObj, cmdlinec, cmdlinev);
|
2443 |
|
|
|
2444 |
|
|
result = Itcl_ReportFuncErrors(interp, mfunc,
|
2445 |
|
|
contextObj, result);
|
2446 |
|
|
|
2447 |
|
|
Itcl_ReleaseData((ClientData)mfunc);
|
2448 |
|
|
Tcl_DecrRefCount(cmdlinePtr);
|
2449 |
|
|
}
|
2450 |
|
|
return result;
|
2451 |
|
|
}
|
2452 |
|
|
|
2453 |
|
|
|
2454 |
|
|
/*
|
2455 |
|
|
* ------------------------------------------------------------------------
|
2456 |
|
|
* Itcl_ReportFuncErrors()
|
2457 |
|
|
*
|
2458 |
|
|
* Used to interpret the status code returned when the body of a
|
2459 |
|
|
* Tcl-style proc is executed. Handles the "errorInfo" and "errorCode"
|
2460 |
|
|
* variables properly, and adds error information into the interpreter
|
2461 |
|
|
* if anything went wrong. Returns a new status code that should be
|
2462 |
|
|
* treated as the return status code for the command.
|
2463 |
|
|
*
|
2464 |
|
|
* This same operation is usually buried in the Tcl InterpProc()
|
2465 |
|
|
* procedure. It is defined here so that it can be reused more easily.
|
2466 |
|
|
* ------------------------------------------------------------------------
|
2467 |
|
|
*/
|
2468 |
|
|
int
|
2469 |
|
|
Itcl_ReportFuncErrors(interp, mfunc, contextObj, result)
|
2470 |
|
|
Tcl_Interp* interp; /* interpreter being modified */
|
2471 |
|
|
ItclMemberFunc *mfunc; /* command member that was invoked */
|
2472 |
|
|
ItclObject *contextObj; /* object context for this command */
|
2473 |
|
|
int result; /* integer status code from proc body */
|
2474 |
|
|
{
|
2475 |
|
|
Interp* iPtr = (Interp*)interp;
|
2476 |
|
|
Tcl_Obj *objPtr;
|
2477 |
|
|
char num[20];
|
2478 |
|
|
|
2479 |
|
|
if (result != TCL_OK) {
|
2480 |
|
|
if (result == TCL_RETURN) {
|
2481 |
|
|
result = TclUpdateReturnInfo(iPtr);
|
2482 |
|
|
}
|
2483 |
|
|
else if (result == TCL_ERROR) {
|
2484 |
|
|
objPtr = Tcl_NewStringObj("\n ", -1);
|
2485 |
|
|
Tcl_IncrRefCount(objPtr);
|
2486 |
|
|
|
2487 |
|
|
if (mfunc->member->flags & ITCL_CONSTRUCTOR) {
|
2488 |
|
|
Tcl_AppendToObj(objPtr, "while constructing object \"", -1);
|
2489 |
|
|
Tcl_GetCommandFullName(contextObj->classDefn->interp,
|
2490 |
|
|
contextObj->accessCmd, objPtr);
|
2491 |
|
|
Tcl_AppendToObj(objPtr, "\" in ", -1);
|
2492 |
|
|
Tcl_AppendToObj(objPtr, mfunc->member->fullname, -1);
|
2493 |
|
|
if ((mfunc->member->code->flags & ITCL_IMPLEMENT_TCL) != 0) {
|
2494 |
|
|
Tcl_AppendToObj(objPtr, " (", -1);
|
2495 |
|
|
}
|
2496 |
|
|
}
|
2497 |
|
|
|
2498 |
|
|
else if (mfunc->member->flags & ITCL_DESTRUCTOR) {
|
2499 |
|
|
Tcl_AppendToObj(objPtr, "while deleting object \"", -1);
|
2500 |
|
|
Tcl_GetCommandFullName(contextObj->classDefn->interp,
|
2501 |
|
|
contextObj->accessCmd, objPtr);
|
2502 |
|
|
Tcl_AppendToObj(objPtr, "\" in ", -1);
|
2503 |
|
|
Tcl_AppendToObj(objPtr, mfunc->member->fullname, -1);
|
2504 |
|
|
if ((mfunc->member->code->flags & ITCL_IMPLEMENT_TCL) != 0) {
|
2505 |
|
|
Tcl_AppendToObj(objPtr, " (", -1);
|
2506 |
|
|
}
|
2507 |
|
|
}
|
2508 |
|
|
|
2509 |
|
|
else {
|
2510 |
|
|
Tcl_AppendToObj(objPtr, "(", -1);
|
2511 |
|
|
|
2512 |
|
|
if (contextObj && contextObj->accessCmd) {
|
2513 |
|
|
Tcl_AppendToObj(objPtr, "object \"", -1);
|
2514 |
|
|
Tcl_GetCommandFullName(contextObj->classDefn->interp,
|
2515 |
|
|
contextObj->accessCmd, objPtr);
|
2516 |
|
|
Tcl_AppendToObj(objPtr, "\" ", -1);
|
2517 |
|
|
}
|
2518 |
|
|
|
2519 |
|
|
if ((mfunc->member->flags & ITCL_COMMON) != 0) {
|
2520 |
|
|
Tcl_AppendToObj(objPtr, "procedure", -1);
|
2521 |
|
|
} else {
|
2522 |
|
|
Tcl_AppendToObj(objPtr, "method", -1);
|
2523 |
|
|
}
|
2524 |
|
|
Tcl_AppendToObj(objPtr, " \"", -1);
|
2525 |
|
|
Tcl_AppendToObj(objPtr, mfunc->member->fullname, -1);
|
2526 |
|
|
Tcl_AppendToObj(objPtr, "\" ", -1);
|
2527 |
|
|
}
|
2528 |
|
|
|
2529 |
|
|
if ((mfunc->member->code->flags & ITCL_IMPLEMENT_TCL) != 0) {
|
2530 |
|
|
Tcl_AppendToObj(objPtr, "body line ", -1);
|
2531 |
|
|
sprintf(num, "%d", iPtr->errorLine);
|
2532 |
|
|
Tcl_AppendToObj(objPtr, num, -1);
|
2533 |
|
|
Tcl_AppendToObj(objPtr, ")", -1);
|
2534 |
|
|
} else {
|
2535 |
|
|
Tcl_AppendToObj(objPtr, ")", -1);
|
2536 |
|
|
}
|
2537 |
|
|
|
2538 |
|
|
Tcl_AddErrorInfo(interp, Tcl_GetStringFromObj(objPtr, (int*)NULL));
|
2539 |
|
|
Tcl_DecrRefCount(objPtr);
|
2540 |
|
|
}
|
2541 |
|
|
|
2542 |
|
|
else if (result == TCL_BREAK) {
|
2543 |
|
|
Tcl_ResetResult(interp);
|
2544 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
2545 |
|
|
"invoked \"break\" outside of a loop", -1);
|
2546 |
|
|
result = TCL_ERROR;
|
2547 |
|
|
}
|
2548 |
|
|
|
2549 |
|
|
else if (result == TCL_CONTINUE) {
|
2550 |
|
|
Tcl_ResetResult(interp);
|
2551 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
2552 |
|
|
"invoked \"continue\" outside of a loop", -1);
|
2553 |
|
|
result = TCL_ERROR;
|
2554 |
|
|
}
|
2555 |
|
|
}
|
2556 |
|
|
return result;
|
2557 |
|
|
}
|