From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Serge Petrenko Subject: [PATCH v3 0/4] Introduce decimal type to tarantool core. Date: Tue, 4 Jun 2019 19:04:15 +0300 Message-Id: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit To: georgy@tarantool.org Cc: vdavydov.dev@gmail.com, tarantool-patches@freelists.org, kostja@tarantool.org, Serge Petrenko List-ID: https://github.com/tarantool/tarantool/issues/692 https://github.com/tarantool/tarantool/tree/sp/gh-692-mp-encode-decimal This patchset adds a new type, decimal fixed-point, to tarantool and allows to encode/decode decimals in msgpack. 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 The third patch updates msgpuck library to add extension types, which are used to encode decimals. The fourth patch adds methods to encode/decode decimals, adds the first messagepack ext type, MP_DECIMAL, and tests for encoding/decoding decimals. 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 (4): third-party: add decNumber library lib/core: introduce decimal type to tarantool lib: update msgpuck library decimal: add MessagePack encoding/decoding support .gitmodules | 3 + CMakeLists.txt | 7 + cmake/BuildDecNumber.cmake | 14 + src/CMakeLists.txt | 1 + src/lib/core/CMakeLists.txt | 3 +- src/lib/core/decimal.c | 357 ++++++++++++++++++++++++++ src/lib/core/decimal.h | 197 ++++++++++++++ src/lib/core/mp_user_types.h | 38 +++ src/lib/msgpuck | 2 +- test/unit/CMakeLists.txt | 2 + test/unit/decimal.c | 239 +++++++++++++++++ test/unit/decimal.result | 253 ++++++++++++++++++ test/unit/msgpack.result | 480 ++++++++++++++++++++++++++++++++++- third_party/decNumber | 1 + 14 files changed, 1582 insertions(+), 15 deletions(-) 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 src/lib/core/mp_user_types.h create mode 100644 test/unit/decimal.c create mode 100644 test/unit/decimal.result create mode 160000 third_party/decNumber -- 2.20.1 (Apple Git-117)