[Patches] introducing math.rint
Peter Schneider-Kamp
peter@schneider-kamp.de
Thu, 11 May 2000 18:44:47 +0200
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Problem:
"4.26. math.rint is missing" from to-do list:
Although the math modules provides a wrapper around
ceil(3) and floor(3), there is no wrapper around rint(3).
This is necessary for IEEE-conforming rounding.
Edit this entry / Log info / Last changed on Tue Oct 26 12:49:36 1999 by
Martin v. Loewis
Solution:
introduced math.rint to Modules/mathmodule.c
updated documentation / updated Include/mymath.h / updated tests
patch attached as plaintext context diff
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Peter Schneider-Kamp ++47-7388-7331
Herman Krags veg 51-11 mailto:peter@schneider-kamp.de
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diff -c --recursive python/dist/src/Doc/lib/libmath.tex python-mod/dist/src/Doc/lib/libmath.tex
*** python/dist/src/Doc/lib/libmath.tex Mon Apr 3 22:13:53 2000
--- python-mod/dist/src/Doc/lib/libmath.tex Thu May 11 18:04:14 2000
***************
*** 93,98 ****
--- 93,102 ----
Return \code{\var{x}**\var{y}}.
\end{funcdesc}
+ \begin{funcdesc}{rint}{x, y}
+ Return the integer nearest to \var{x} as a real.
+ \end{funcdesc}
+
\begin{funcdesc}{sin}{x}
Return the sine of \var{x}.
\end{funcdesc}
diff -c --recursive python/dist/src/Include/mymath.h python-mod/dist/src/Include/mymath.h
*** python/dist/src/Include/mymath.h Mon Nov 2 17:21:39 1998
--- python-mod/dist/src/Include/mymath.h Thu May 11 18:02:46 2000
***************
*** 48,53 ****
--- 48,54 ----
#undef log
#undef log10
#undef pow
+ #undef rint
#undef sin
#undef sinh
#undef sqrt
***************
*** 67,72 ****
--- 68,74 ----
#define log logd
#define log10 log10d
#define pow powd
+ #define rint rintd
#define sin sind
#define sinh sinhd
#define sqrt sqrtd
diff -c --recursive python/dist/src/Lib/test/output/test_math python-mod/dist/src/Lib/test/output/test_math
*** python/dist/src/Lib/test/output/test_math Wed Dec 11 00:19:51 1996
--- python-mod/dist/src/Lib/test/output/test_math Thu May 11 18:01:16 2000
***************
*** 19,24 ****
--- 19,25 ----
log10
modf
pow
+ rint
sin
sinh
sqrt
diff -c --recursive python/dist/src/Lib/test/test_math.py python-mod/dist/src/Lib/test/test_math.py
*** python/dist/src/Lib/test/test_math.py Thu Aug 29 21:00:46 1996
--- python-mod/dist/src/Lib/test/test_math.py Thu May 11 18:01:02 2000
***************
*** 129,134 ****
--- 129,140 ----
testit('pow(2,1)', math.pow(2,1), 2)
testit('pow(2,-1)', math.pow(2,-1), 0.5)
+ print 'rint'
+ testit('rint(0.7)', math.rint(0.7), 1)
+ testit('rint(-0.3)', math.rint(-0.3), 0)
+ testit('rint(2.5)', math.rint(2.5), 2)
+ testit('rint(3.5)', math.rint(3.5), 4)
+
print 'sin'
testit('sin(0)', math.sin(0), 0)
testit('sin(pi/2)', math.sin(math.pi/2), 1)
diff -c --recursive python/dist/src/Modules/mathmodule.c python-mod/dist/src/Modules/mathmodule.c
*** python/dist/src/Modules/mathmodule.c Mon May 8 16:29:38 2000
--- python-mod/dist/src/Modules/mathmodule.c Thu May 11 17:58:45 2000
***************
*** 156,161 ****
--- 156,163 ----
FUNC2(math_pow, pow, math_pow_doc,
"pow(x,y)\n\nReturn x**y.")
#endif
+ FUNC1(math_rint, rint, math_rint_doc,
+ "rint(x)\n\nReturn the integer nearest to x as a real.")
FUNC1(math_sin, sin, math_sin_doc,
"sin(x)\n\nReturn the sine of x.")
FUNC1(math_sinh, sinh, math_sinh_doc,
***************
*** 266,272 ****
{"log", math_log, 0, math_log_doc},
{"log10", math_log10, 0, math_log10_doc},
{"modf", math_modf, 0, math_modf_doc},
! {"pow", math_pow, 0, math_pow_doc},
{"sin", math_sin, 0, math_sin_doc},
{"sinh", math_sinh, 0, math_sinh_doc},
{"sqrt", math_sqrt, 0, math_sqrt_doc},
--- 268,275 ----
{"log", math_log, 0, math_log_doc},
{"log10", math_log10, 0, math_log10_doc},
{"modf", math_modf, 0, math_modf_doc},
! {"pow", math_pow, 0, math_pow_doc},
! {"rint", math_rint, 0, math_rint_doc},
{"sin", math_sin, 0, math_sin_doc},
{"sinh", math_sinh, 0, math_sinh_doc},
{"sqrt", math_sqrt, 0, math_sqrt_doc},
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