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authorTom Musta <tommusta@gmail.com>2014-04-21 15:54:53 -0500
committerAlexander Graf <agraf@suse.de>2014-06-16 13:24:29 +0200
commit8e706db21ecfba75da3f9f843f1fa36276085742 (patch)
tree6f87bf3754b5c1ff98ee225cbe347695d52524eb
parente58f8d1ff9f1f71bb1162ccd2f05c258ca8efdbe (diff)
libdecnumber: Introduce decNumberFrom[U]Int64
Introduce two conversion functions to the libdecnumber library. These conversions transform 64 bit integers to the internal decNumber representation. Both a signed and unsigned version is added. Signed-off-by: Tom Musta <tommusta@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
-rw-r--r--include/libdecnumber/decNumber.h2
-rw-r--r--libdecnumber/decNumber.c30
2 files changed, 32 insertions, 0 deletions
diff --git a/include/libdecnumber/decNumber.h b/include/libdecnumber/decNumber.h
index fb324bd35a..f4bf99417c 100644
--- a/include/libdecnumber/decNumber.h
+++ b/include/libdecnumber/decNumber.h
@@ -115,6 +115,8 @@
/* Conversions */
decNumber * decNumberFromInt32(decNumber *, int32_t);
decNumber * decNumberFromUInt32(decNumber *, uint32_t);
+ decNumber *decNumberFromInt64(decNumber *, int64_t);
+ decNumber *decNumberFromUInt64(decNumber *, uint64_t);
decNumber * decNumberFromString(decNumber *, const char *, decContext *);
char * decNumberToString(const decNumber *, char *);
char * decNumberToEngString(const decNumber *, char *);
diff --git a/libdecnumber/decNumber.c b/libdecnumber/decNumber.c
index f6b6eb113a..6bd7565b34 100644
--- a/libdecnumber/decNumber.c
+++ b/libdecnumber/decNumber.c
@@ -436,6 +436,36 @@ uInt decNumberToUInt32(const decNumber *dn, decContext *set) {
return 0;
} /* decNumberToUInt32 */
+decNumber *decNumberFromInt64(decNumber *dn, int64_t in)
+{
+ uint64_t unsig = in;
+ if (in < 0) {
+ unsig = -unsig;
+ }
+
+ decNumberFromUInt64(dn, unsig);
+ if (in < 0) {
+ dn->bits = DECNEG; /* sign needed */
+ }
+ return dn;
+} /* decNumberFromInt64 */
+
+decNumber *decNumberFromUInt64(decNumber *dn, uint64_t uin)
+{
+ Unit *up; /* work pointer */
+ decNumberZero(dn); /* clean */
+ if (uin == 0) {
+ return dn; /* [or decGetDigits bad call] */
+ }
+ for (up = dn->lsu; uin > 0; up++) {
+ *up = (Unit)(uin % (DECDPUNMAX + 1));
+ uin = uin / (DECDPUNMAX + 1);
+ }
+ dn->digits = decGetDigits(dn->lsu, up-dn->lsu);
+ return dn;
+} /* decNumberFromUInt64 */
+
+
/* ------------------------------------------------------------------ */
/* to-scientific-string -- conversion to numeric string */
/* to-engineering-string -- conversion to numeric string */