/
dynload.c
146 lines (126 loc) · 4.06 KB
/
dynload.c
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
/*
* R : A Computer Language for Statistical Data Analysis
* Copyright (C) 1995-1996 Robert Gentleman and Ross Ihaka
* Copyright (C) 1997-2001 The R Development Core Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* Dynamic Loading Support: See ../main/Rdynload.c and ../include/Rdynpriv.h
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <stdlib.h>
#include <Defn.h>
#include <Rmath.h>
#include <direct.h>
#include <windows.h>
#include <R_ext/Rdynload.h>
#include <Rdynpriv.h>
/* Inserts the specified DLL at the head of the DLL list */
/* Returns 1 if the library was successfully added */
/* and returns 0 if the library table is full or */
/* or if LoadLibrary fails for some reason. */
static void fixPath(char *path)
{
char *p;
for(p = path; *p != '\0'; p++) if(*p == '\\') *p = '/';
}
static HINSTANCE R_loadLibrary(const char *path, int asLocal, int now);
static DL_FUNC getRoutine(DllInfo *info, char const *name);
static void R_deleteCachedSymbols(DllInfo *dll);
static void R_getDLLError(char *buf, int len);
static void GetFullDLLPath(SEXP call, char *buf, char *path);
static void closeLibrary(HINSTANCE handle)
{
FreeLibrary(handle);
}
void InitFunctionHashing()
{
R_osDynSymbol->loadLibrary = R_loadLibrary;
R_osDynSymbol->dlsym = getRoutine;
R_osDynSymbol->closeLibrary = closeLibrary;
R_osDynSymbol->getError = R_getDLLError;
R_osDynSymbol->deleteCachedSymbols = R_deleteCachedSymbols;
R_osDynSymbol->lookupCachedSymbol = Rf_lookupCachedSymbol;
R_osDynSymbol->fixPath = fixPath;
R_osDynSymbol->getFullDLLPath = GetFullDLLPath;
}
static void R_deleteCachedSymbols(DllInfo *dll)
{
int i;
for(i = nCPFun - 1; i >= 0; i--)
if(!strcmp(CPFun[i].pkg, dll->name)) {
if(i < nCPFun - 1) {
strcpy(CPFun[i].name, CPFun[--nCPFun].name);
strcpy(CPFun[i].pkg, CPFun[nCPFun].pkg);
CPFun[i].func = CPFun[nCPFun].func;
} else nCPFun--;
}
}
HINSTANCE R_loadLibrary(const char *path, int asLocal, int now)
{
HINSTANCE tdlh;
unsigned int dllcw, rcw;
rcw = _controlfp(0,0) & ~_MCW_IC; /* Infinity control is ignored */
_clearfp();
tdlh = LoadLibrary(path);
dllcw = _controlfp(0,0) & ~_MCW_IC;
if (dllcw != rcw) {
_controlfp(rcw, _MCW_EM | _MCW_IC | _MCW_RC | _MCW_PC);
if (LOGICAL(GetOption(install("warn.FPU"), R_NilValue))[0])
warning("DLL attempted to change FPU control word from %x to %x",
rcw,dllcw);
}
return(tdlh);
}
static DL_FUNC getRoutine(DllInfo *info, char const *name)
{
DL_FUNC f;
f = (DL_FUNC) GetProcAddress(info->handle, name);
return(f);
}
static void R_getDLLError(char *buf, int len)
{
LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0,
NULL
);
strcpy(buf, "LoadLibrary failure: ");
strcat(buf, lpMsgBuf);
LocalFree(lpMsgBuf);
}
static void GetFullDLLPath(SEXP call, char *buf, char *path)
{
char *p;
if ((path[0] != '/') && (path[0] != '\\') && (path[1] != ':')) {
if (!getcwd(buf, MAX_PATH))
errorcall(call, "can't get working directory!");
strcat(buf, "\\");
strcat(buf, path);
} else
strcpy(buf, path);
/* fix slashes to allow inconsistent usage later */
for (p = buf; *p; p++) if (*p == '\\') *p = '/';
}