This patchset adds a new type, decimal fixed-point, to tarantool,
together with methods to pack/unpack decimals, arithmetic operations
ad math functions.
The first patch adds decNumber library as a submodule.
The second patch adds a small wrapper to the library to make it work
with fixed-point decimal values, and adds a unit test.
To evaluate number precision and scale from exponent and the amount of
significant digits the following formulas are applied:
If exponent < 0 then precision = MAX(digits, -exponent) and scale = -exponent
If exponent > 0 then precision = digits + exponent, and scale = 0
Changes in v4:
- review fixes as per review
from @locker.
- remove patches 3 and 4,
add decimal_pack/unpack as
a preparation for patches
4 and 4 to patch 2.
Changes in v3:
- add patches 3 and 4 to
encode/decode decimals
as msgpack.
Changes in v2:
- get rid of explicit precision and scale,
evaluate them from decNumber digits and exponent.
- decimal is now an alias for decNumber
- ln, log10, exp, sqrt, pow now accept precision to
which the result should be rounded.
Serge Petrenko (2):
third-party: add decNumber library
lib/core: introduce decimal type to tarantool
.gitmodules | 3 +
CMakeLists.txt | 7 +
cmake/BuildDecNumber.cmake | 14 ++
src/CMakeLists.txt | 1 +
src/lib/core/CMakeLists.txt | 3 +-
src/lib/core/decimal.c | 354 +++++++++++++++++++++++++++++++
src/lib/core/decimal.h | 206 ++++++++++++++++++
test/unit/CMakeLists.txt | 2 +
test/unit/decimal.c | 174 ++++++++++++++++
test/unit/decimal.result | 406 ++++++++++++++++++++++++++++++++++++
third_party/decNumber | 1 +
11 files changed, 1170 insertions(+), 1 deletion(-)
create mode 100644 cmake/BuildDecNumber.cmake
create mode 100644 src/lib/core/decimal.c
create mode 100644 src/lib/core/decimal.h
create mode 100644 test/unit/decimal.c
create mode 100644 test/unit/decimal.result
create mode 160000 third_party/decNumber
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2.20.1 (Apple Git-117)