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Stefan Krah 0e41981cd5 Use abort() rather than exit() to appease tools like rpmlint. abort() is used in libmpdec to prevent undefined behavior if an invalid context is used. This cannot occur for the _decimal module since user input for the context is validated.		2012-03-30 14:12:20 +02:00
..
libmpdec	Use abort() rather than exit() to appease tools like rpmlint. abort() is used	2012-03-30 14:12:20 +02:00
tests
_decimal.c	Raise MemoryError instead of InvalidOperation/MallocError for compatibility	2012-03-25 18:59:21 +02:00
docstrings.h
ISSUES.txt
README.txt

README.txt


About
=====

_decimal.c is a wrapper for the libmpdec library. libmpdec is a fast C
library for correctly-rounded arbitrary precision decimal floating point
arithmetic. It is a complete implementation of Mike Cowlishaw/IBM's
General Decimal Arithmetic Specification.


Build process for the module
============================

As usual, the build process for _decimal.so is driven by setup.py in the top
level directory. setup.py autodetects the following build configurations:

   1) x64         - 64-bit Python, x86_64 processor (AMD, Intel)

   2) uint128     - 64-bit Python, compiler provides __uint128_t (gcc)

   3) ansi64      - 64-bit Python, ANSI C

   4) ppro        - 32-bit Python, x86 CPU, PentiumPro or later

   5) ansi32      - 32-bit Python, ANSI C

   6) ansi-legacy - 32-bit Python, compiler without uint64_t

   7) universal   - Mac OS only (multi-arch)


It is possible to override autodetection by exporting:

   PYTHON_DECIMAL_WITH_MACHINE=value, where value is one of the above options.


NOTE
====
 
decimal.so is not built from a static libmpdec.a since doing so led to
failures on AIX (user report) and Windows (mixing static and dynamic CRTs
causes locale problems and more).