1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* tclStubLib.c --
*
* Stub object that will be statically linked into extensions that want
* to access Tcl.
*
* Copyright (c) 1998-1999 by Scriptics Corporation.
* Copyright (c) 1998 Paul Duffin.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tclStubLib.c,v 1.24 2008/04/02 21:29:05 das Exp $
*/
/*
* We need to ensure that we use the stub macros so that this file contains no
* references to any of the stub functions. This will make it possible to
* build an extension that references Tcl_InitStubs but doesn't end up
* including the rest of the stub functions.
*/
#define USE_TCL_STUBS
#include "tclInt.h"
MODULE_SCOPE const TclStubs *tclStubsPtr;
MODULE_SCOPE const TclPlatStubs *tclPlatStubsPtr;
MODULE_SCOPE const TclIntStubs *tclIntStubsPtr;
MODULE_SCOPE const TclIntPlatStubs *tclIntPlatStubsPtr;
MODULE_SCOPE const TclTomMathStubs* tclTomMathStubsPtr;
const TclStubs *tclStubsPtr = NULL;
const TclPlatStubs *tclPlatStubsPtr = NULL;
const TclIntStubs *tclIntStubsPtr = NULL;
const TclIntPlatStubs *tclIntPlatStubsPtr = NULL;
const TclTomMathStubs* tclTomMathStubsPtr = NULL;
static TclStubs *
HasStubSupport(
Tcl_Interp *interp)
{
Interp *iPtr = (Interp *) interp;
if (iPtr->stubTable && (iPtr->stubTable->magic == TCL_STUB_MAGIC)) {
return iPtr->stubTable;
}
interp->result =
"This interpreter does not support stubs-enabled extensions.";
interp->freeProc = TCL_STATIC;
return NULL;
}
/*
* Use our own isdigit to avoid linking to libc on windows
*/
static int isDigit(const int c)
{
return (c >= '0' && c <= '9');
}
/*
*----------------------------------------------------------------------
*
* Tcl_InitStubs --
*
* Tries to initialise the stub table pointers and ensures that the
* correct version of Tcl is loaded.
*
* Results:
* The actual version of Tcl that satisfies the request, or NULL to
* indicate that an error occurred.
*
* Side effects:
* Sets the stub table pointers.
*
*----------------------------------------------------------------------
*/
MODULE_SCOPE CONST char *
Tcl_InitStubs(
Tcl_Interp *interp,
CONST char *version,
int exact)
{
CONST char *actualVersion = NULL;
ClientData pkgData = NULL;
/*
* We can't optimize this check by caching tclStubsPtr because that
* prevents apps from being able to load/unload Tcl dynamically multiple
* times. [Bug 615304]
*/
tclStubsPtr = HasStubSupport(interp);
if (!tclStubsPtr) {
return NULL;
}
actualVersion = Tcl_PkgRequireEx(interp, "Tcl", version, 0, &pkgData);
if (actualVersion == NULL) {
return NULL;
}
if (exact) {
CONST char *p = version;
int count = 0;
while (*p) {
count += !isDigit(*p++);
}
if (count == 1) {
CONST char *q = actualVersion;
p = version;
while (*p && (*p == *q)) {
p++; q++;
}
if (*p) {
/* Construct error message */
Tcl_PkgRequireEx(interp, "Tcl", version, 1, NULL);
return NULL;
}
} else {
actualVersion = Tcl_PkgRequireEx(interp, "Tcl", version, 1, NULL);
if (actualVersion == NULL) {
return NULL;
}
}
}
tclStubsPtr = (TclStubs*)pkgData;
if (tclStubsPtr->hooks) {
tclPlatStubsPtr = tclStubsPtr->hooks->tclPlatStubs;
tclIntStubsPtr = tclStubsPtr->hooks->tclIntStubs;
tclIntPlatStubsPtr = tclStubsPtr->hooks->tclIntPlatStubs;
} else {
tclPlatStubsPtr = NULL;
tclIntStubsPtr = NULL;
tclIntPlatStubsPtr = NULL;
}
return actualVersion;
}
/*
*----------------------------------------------------------------------
*
* TclTomMathInitStubs --
*
* Initializes the Stubs table for Tcl's subset of libtommath
*
* Results:
* Returns a standard Tcl result.
*
* This procedure should not be called directly, but rather through
* the TclTomMath_InitStubs macro, to insure that the Stubs table
* matches the header files used in compilation.
*
*----------------------------------------------------------------------
*/
MODULE_SCOPE CONST char*
TclTomMathInitializeStubs(
Tcl_Interp* interp, /* Tcl interpreter */
CONST char* version, /* Tcl version needed */
int epoch, /* Stubs table epoch from the header files */
int revision /* Stubs table revision number from the
* header files */
) {
int exact = 0;
const char* packageName = "tcl::tommath";
const char* errMsg = NULL;
ClientData pkgClientData = NULL;
const char* actualVersion =
Tcl_PkgRequireEx(interp, packageName, version, exact, &pkgClientData);
TclTomMathStubs* stubsPtr = (TclTomMathStubs*) pkgClientData;
if (actualVersion == NULL) {
return NULL;
}
if (pkgClientData == NULL) {
errMsg = "missing stub table pointer";
} else if ((stubsPtr->tclBN_epoch)() != epoch) {
errMsg = "epoch number mismatch";
} else if ((stubsPtr->tclBN_revision)() != revision) {
errMsg = "requires a later revision";
} else {
tclTomMathStubsPtr = stubsPtr;
return actualVersion;
}
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "error loading ", packageName,
" (requested version ", version,
", actual version ", actualVersion,
"): ", errMsg, NULL);
return NULL;
}
|
