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authorWilliam Joye <wjoye@cfa.harvard.edu>2018-01-02 21:03:49 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2018-01-02 21:03:49 (GMT)
commit914501b5b992e7b6c7e0a4c958712a8ba9cab41c (patch)
treeedbc059b9557d5fdb79e5a5c47889bc54708da53 /tcl8.6/libtommath/bn_mp_set_int.c
parentf88c190a01bc7f57e79dfaf91a3c0c48c2031549 (diff)
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upgrade to tcl/tk 8.6.8
Diffstat (limited to 'tcl8.6/libtommath/bn_mp_set_int.c')
-rw-r--r--tcl8.6/libtommath/bn_mp_set_int.c44
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diff --git a/tcl8.6/libtommath/bn_mp_set_int.c b/tcl8.6/libtommath/bn_mp_set_int.c
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+++ b/tcl8.6/libtommath/bn_mp_set_int.c
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+#include <tommath.h>
+#ifdef BN_MP_SET_INT_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
+ */
+
+/* set a 32-bit const */
+int mp_set_int (mp_int * a, unsigned long b)
+{
+ int x, res;
+
+ mp_zero (a);
+
+ /* set four bits at a time */
+ for (x = 0; x < 8; x++) {
+ /* shift the number up four bits */
+ if ((res = mp_mul_2d (a, 4, a)) != MP_OKAY) {
+ return res;
+ }
+
+ /* OR in the top four bits of the source */
+ a->dp[0] |= (b >> 28) & 15;
+
+ /* shift the source up to the next four bits */
+ b <<= 4;
+
+ /* ensure that digits are not clamped off */
+ a->used += 1;
+ }
+ mp_clamp (a);
+ return MP_OKAY;
+}
+#endif