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ruby/missing/hypot.c

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* io.c (argf_seek_m): wrong calling sequence of rb_io_seek(). * parse.y (cond0): no special treatment of string literal in condition. * math.c: add acos, asin, atan, conh, sinh, tanh and hypot to Math. * configure.in: check hypot availablility. * missing/hypot.c: public domain rewrite of hypot. * parse.y (warn_unless_e_option): warning condition was wrong. * parse.y (warning_unless_e_option): ditto. * enum.c (enum_all): new method 'all?', which returns true if block returns true for all elements. * enum.c (enum_any): new method 'any?', which returns true if block retruns true for any of elements. * marshal.c (marshal_load): do not give warning unless explicitly set to verbose. * eval.c (rb_exit): give string value "exit" to SystemExit. * ruby.c (proc_options): -v should not print version if proc_options called via moreswitches(). * parse.y (stmt): while/until modifier must work for empty body. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1241 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2001-03-13 08:45:13 +03:00
/* public domain rewrite of hypot */
* missing/*.c: include missing.h git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28771 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2010-07-28 12:12:01 +04:00
#include "ruby/missing.h"
* io.c (argf_seek_m): wrong calling sequence of rb_io_seek(). * parse.y (cond0): no special treatment of string literal in condition. * math.c: add acos, asin, atan, conh, sinh, tanh and hypot to Math. * configure.in: check hypot availablility. * missing/hypot.c: public domain rewrite of hypot. * parse.y (warn_unless_e_option): warning condition was wrong. * parse.y (warning_unless_e_option): ditto. * enum.c (enum_all): new method 'all?', which returns true if block returns true for all elements. * enum.c (enum_any): new method 'any?', which returns true if block retruns true for any of elements. * marshal.c (marshal_load): do not give warning unless explicitly set to verbose. * eval.c (rb_exit): give string value "exit" to SystemExit. * ruby.c (proc_options): -v should not print version if proc_options called via moreswitches(). * parse.y (stmt): while/until modifier must work for empty body. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1241 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2001-03-13 08:45:13 +03:00
#include <math.h>
* missing.h, missing/*.c: SUSv3 compatible strcasecmp and strncasecmp, ANSI compatible strtol and strtoul, and ANSI styled other functions. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9438 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2005-10-22 05:28:00 +04:00
double hypot(double x, double y)
* io.c (argf_seek_m): wrong calling sequence of rb_io_seek(). * parse.y (cond0): no special treatment of string literal in condition. * math.c: add acos, asin, atan, conh, sinh, tanh and hypot to Math. * configure.in: check hypot availablility. * missing/hypot.c: public domain rewrite of hypot. * parse.y (warn_unless_e_option): warning condition was wrong. * parse.y (warning_unless_e_option): ditto. * enum.c (enum_all): new method 'all?', which returns true if block returns true for all elements. * enum.c (enum_any): new method 'any?', which returns true if block retruns true for any of elements. * marshal.c (marshal_load): do not give warning unless explicitly set to verbose. * eval.c (rb_exit): give string value "exit" to SystemExit. * ruby.c (proc_options): -v should not print version if proc_options called via moreswitches(). * parse.y (stmt): while/until modifier must work for empty body. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1241 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2001-03-13 08:45:13 +03:00
{
if (x < 0) x = -x;
if (y < 0) y = -y;
if (x < y) {
double tmp = x;
x = y; y = tmp;
}
if (y == 0.0) return x;
y /= x;
return x * sqrt(1.0+y*y);
}