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/*
*----------------------------------------------------------------------
*
* 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;
}
/*
*----------------------------------------------------------------------
*
* TclInitBignumFromLong --
*
* Allocate and initialize a 'bignum' from a native 'long'.
*
* Results:
* None.
*
* Side effects:
* The 'bignum' is constructed.
*
*----------------------------------------------------------------------
*/
void
TclInitBignumFromLong(
mp_int *a,
long v)
{
if (mp_init_size(a, (CHAR_BIT * sizeof(long) + DIGIT_BIT - 1) / DIGIT_BIT) != MP_OKAY) {
Tcl_Panic("initialization failure in TclInitBignumFromLong");
}
if (v < (long)0) {
mp_set_long_long(a, (Tcl_WideUInt)(-(Tcl_WideInt)v));
mp_neg(a, a);
} else {
mp_set_long_long(a, (Tcl_WideUInt)v);
}
}
/*
*----------------------------------------------------------------------
*
* TclBNInitBignumFromWideInt --
*
* 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_size(a, (CHAR_BIT * sizeof(Tcl_WideUInt) + DIGIT_BIT - 1) / DIGIT_BIT) != MP_OKAY) {
Tcl_Panic("initialization failure in TclInitBignumFromWideInt");
}
if (v < (Tcl_WideInt)0) {
mp_set_long_long(a, (Tcl_WideUInt)(-v));
mp_neg(a, a);
} else {
mp_set_long_long(a, (Tcl_WideUInt)v);
}
}
/*
*----------------------------------------------------------------------
*
* TclBNInitBignumFromWideUInt --
*
* 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_size(a, (CHAR_BIT * sizeof(Tcl_WideUInt) + DIGIT_BIT - 1) / DIGIT_BIT) != 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:
*/
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