summaryrefslogtreecommitdiffstats
path: root/generic/tclTomMathInterface.c
blob: ae1eb7e09a29c5b3d85003bf499d46d5a5cd1772 (plain)
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
/*
 *----------------------------------------------------------------------
 *
 * tclTomMathInterface.c --
 *
 *	This file contains procedures that are used as a 'glue' layer between
 *	Tcl and libtommath.
 *
 * Copyright (c) 2005 by Kevin B. Kenny.  All rights reserved.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tclInt.h"
#include "tommath.h"

MODULE_SCOPE const TclTomMathStubs tclTomMathStubs;

/*
 *----------------------------------------------------------------------
 *
 * TclTommath_Init --
 *
 *	Initializes the TclTomMath 'package', which exists as a
 *	placeholder so that the package data can be used to hold
 *	a stub table pointer.
 *
 * Results:
 *	Returns a standard Tcl result.
 *
 * Side effects:
 *	Installs the stub table for tommath.
 *
 *----------------------------------------------------------------------
 */

int
TclTommath_Init(
    Tcl_Interp *interp)		/* Tcl interpreter */
{
    /* TIP #268: Full patchlevel instead of just major.minor */

    if (Tcl_PkgProvideEx(interp, "tcl::tommath", TCL_PATCH_LEVEL,
	    &tclTomMathStubs) != TCL_OK) {
	return TCL_ERROR;
    }
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * TclBN_epoch --
 *
 *	Return the epoch number of the TclTomMath stubs table
 *
 * Results:
 *	Returns an arbitrary integer that does not decrease with
 *	release.  Stubs tables with different epochs are incompatible.
 *
 *----------------------------------------------------------------------
 */

int
TclBN_epoch(void)
{
    return TCLTOMMATH_EPOCH;
}

/*
 *----------------------------------------------------------------------
 *
 * TclBN_revision --
 *
 *	Returns the revision level of the TclTomMath stubs table
 *
 * Results:
 *	Returns an arbitrary integer that increases with revisions.
 *	If a client requires a given epoch and revision, any Stubs table
 *	with the same epoch and an equal or higher revision satisfies
 *	the request.
 *
 *----------------------------------------------------------------------
 */

int
TclBN_revision(void)
{
    return TCLTOMMATH_REVISION;
}

/*
 *----------------------------------------------------------------------
 *
 * TclInitBignumFromWideInt --
 *
 *	Allocate and initialize a 'bignum' from a Tcl_WideInt
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The 'bignum' is constructed.
 *
 *----------------------------------------------------------------------
 */

void
TclInitBignumFromWideInt(
    mp_int *a,			/* Bignum to initialize */
    Tcl_WideInt v)		/* Initial value */
{
	if (mp_init(a) != MP_OKAY) {
		Tcl_Panic("initialization failure in TclInitBignumFromWideInt");
	}
    if (v < 0) {
	mp_set_long_long(a, (Tcl_WideUInt)(-v));
	mp_neg(a, a);
    } else {
	mp_set_long_long(a, (Tcl_WideUInt)v);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TclInitBignumFromWideUInt --
 *
 *	Allocate and initialize a 'bignum' from a Tcl_WideUInt
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The 'bignum' is constructed.
 *
 *----------------------------------------------------------------------
 */

void
TclInitBignumFromWideUInt(
    mp_int *a,			/* Bignum to initialize */
    Tcl_WideUInt v)		/* Initial value */
{
	if (mp_init(a) != MP_OKAY) {
	    Tcl_Panic("initialization failure in TclInitBignumFromWideUInt");
	}
	mp_set_long_long(a, v);
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */