Assume that we have rint().
Windows has this since _MSC_VER >= 1200, and so do all other live platforms according to the buildfarm, so remove the configure probe and src/port/ substitution. This is part of a series of commits to get rid of no-longer-relevant configure checks and dead src/port/ code. I'm committing them separately to make it easier to back out individual changes if they prove less portable than I expect. Discussion: https://postgr.es/m/15379.1582221614@sss.pgh.pa.us
This commit is contained in:
Tom Lane
parent
1200d71a09
commit
f88a058200
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@ -15628,19 +15628,6 @@ esac
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fi
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ac_fn_c_check_func "$LINENO" "rint" "ac_cv_func_rint"
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if test "x$ac_cv_func_rint" = xyes; then :
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$as_echo "#define HAVE_RINT 1" >>confdefs.h
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else
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case " $LIBOBJS " in
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*" rint.$ac_objext "* ) ;;
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*) LIBOBJS="$LIBOBJS rint.$ac_objext"
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;;
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esac
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fi
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ac_fn_c_check_func "$LINENO" "srandom" "ac_cv_func_srandom"
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if test "x$ac_cv_func_srandom" = xyes; then :
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$as_echo "#define HAVE_SRANDOM 1" >>confdefs.h
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@ -1707,7 +1707,6 @@ AC_REPLACE_FUNCS(m4_normalize([
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pread
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pwrite
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random
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rint
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srandom
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strlcat
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strlcpy
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@ -451,9 +451,6 @@
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/* Define to 1 if you have the `readlink' function. */
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#undef HAVE_READLINK
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/* Define to 1 if you have the `rint' function. */
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#undef HAVE_RINT
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/* Define to 1 if you have the global variable
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'rl_completion_append_character'. */
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#undef HAVE_RL_COMPLETION_APPEND_CHARACTER
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@ -385,10 +385,6 @@ extern float pg_strtof(const char *nptr, char **endptr);
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extern char *mkdtemp(char *path);
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#endif
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#ifndef HAVE_RINT
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extern double rint(double x);
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#endif
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#ifndef HAVE_INET_ATON
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#include <netinet/in.h>
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#include <arpa/inet.h>
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@ -1,97 +0,0 @@
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/*-------------------------------------------------------------------------
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*
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* rint.c
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* rint() implementation
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*
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* By Pedro Gimeno Fortea, donated to the public domain
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*
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* IDENTIFICATION
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* src/port/rint.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "c.h"
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#include <math.h>
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/*
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* Round to nearest integer, with halfway cases going to the nearest even.
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*/
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double
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rint(double x)
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{
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double x_orig;
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double r;
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/* Per POSIX, NaNs must be returned unchanged. */
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if (isnan(x))
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return x;
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if (x <= 0.0)
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{
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/* Both positive and negative zero should be returned unchanged. */
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if (x == 0.0)
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return x;
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/*
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* Subtracting 0.5 from a number very close to -0.5 can round to
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* exactly -1.0, producing incorrect results, so we take the opposite
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* approach: add 0.5 to the negative number, so that it goes closer to
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* zero (or at most to +0.5, which is dealt with next), avoiding the
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* precision issue.
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*/
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x_orig = x;
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x += 0.5;
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/*
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* Be careful to return minus zero when input+0.5 >= 0, as that's what
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* rint() should return with negative input.
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*/
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if (x >= 0.0)
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return -0.0;
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/*
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* For very big numbers the input may have no decimals. That case is
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* detected by testing x+0.5 == x+1.0; if that happens, the input is
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* returned unchanged. This also covers the case of minus infinity.
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*/
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if (x == x_orig + 1.0)
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return x_orig;
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/* Otherwise produce a rounded estimate. */
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r = floor(x);
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/*
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* If the rounding did not produce exactly input+0.5 then we're done.
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*/
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if (r != x)
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return r;
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/*
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* The original fractional part was exactly 0.5 (since
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* floor(input+0.5) == input+0.5). We need to round to nearest even.
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* Dividing input+0.5 by 2, taking the floor and multiplying by 2
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* yields the closest even number. This part assumes that division by
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* 2 is exact, which should be OK because underflow is impossible
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* here: x is an integer.
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*/
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return floor(x * 0.5) * 2.0;
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}
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else
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{
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/*
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* The positive case is similar but with signs inverted and using
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* ceil() instead of floor().
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*/
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x_orig = x;
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x -= 0.5;
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if (x <= 0.0)
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return 0.0;
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if (x == x_orig - 1.0)
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return x_orig;
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r = ceil(x);
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if (r != x)
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return r;
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return ceil(x * 0.5) * 2.0;
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}
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}
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@ -104,8 +104,6 @@ sub mkvcbuild
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sprompt.c strerror.c tar.c thread.c
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win32env.c win32error.c win32security.c win32setlocale.c);
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push(@pgportfiles, 'rint.c') if ($vsVersion < '12.00');
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push(@pgportfiles, 'strtof.c') if ($vsVersion < '14.00');
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if ($vsVersion >= '9.00')
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@ -321,7 +321,6 @@ sub GenerateFiles
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HAVE_READLINE_HISTORY_H => undef,
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HAVE_READLINE_READLINE_H => undef,
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HAVE_READLINK => undef,
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HAVE_RINT => 1,
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HAVE_RL_COMPLETION_APPEND_CHARACTER => undef,
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HAVE_RL_COMPLETION_MATCHES => undef,
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HAVE_RL_COMPLETION_SUPPRESS_QUOTE => undef,
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