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libdecnumber: Introduce decNumberIntegralToInt64

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Introduce a new conversion function to the libdecnumber library.
This function converts a decNumber to a signed 64-bit integer.
In order to support 64-bit integers (which may have up to 19
decimal digits), the existing "powers of 10" array is expanded
from 10 to 19 entries.

Signed-off-by: Tom Musta <tommusta@gmail.com>
[agraf: fix 32bit host compile]
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Tom Musta
2014-04-21 15:54:54 -05:00
committed by Alexander Graf
parent 8e706db21e
commit 79af357225
4 changed files with 51 additions and 4 deletions
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6
libdecnumber/decContext.c
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@ -56,8 +56,10 @@ const uByte DECSTICKYTAB[10]={1,1,2,3,4,6,6,7,8,9}; /* used if sticky */
/* ------------------------------------------------------------------ */
/* Powers of ten (powers[n]==10**n, 0<=n<=9) */
/* ------------------------------------------------------------------ */
const uInt DECPOWERS[10]={1, 10, 100, 1000, 10000, 100000, 1000000,
10000000, 100000000, 1000000000};
const uLong DECPOWERS[19] = {1, 10, 100, 1000, 10000, 100000, 1000000,
10000000, 100000000, 1000000000, 10000000000ULL, 100000000000ULL,
1000000000000ULL, 10000000000000ULL, 100000000000000ULL, 1000000000000000ULL,
10000000000000000ULL, 100000000000000000ULL, 1000000000000000000ULL, };
/* ------------------------------------------------------------------ */
/* decContextClearStatus -- clear bits in current status */