# Prefix math\_\* funcs

**URL:** <https://www.ruby-forum.com/t/prefix-math-funcs/151717>\
**Category:** Development\
**Created:** [October 24, 2008, 7:44pm UTC](https://www.ruby-forum.com/t/prefix-math-funcs/151717 "2008-10-24T19:44:55Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\
**Post date:** [October 24, 2008, 7:44pm UTC](https://www.ruby-forum.com/t/prefix-math-funcs/151717/1 "2008-10-24T19:44:55Z")

</div>

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# Index: complex.c

— complex.c (revision 19925)  
+++ complex.c (working copy)  
@@ -414,31 +414,31 @@  
return rb\_funcall2(rb\_cComplex, id\_convert, argc, argv);  
}

-extern VALUE math\_atan2(VALUE obj, VALUE x, VALUE y);  
-extern VALUE math\_cos(VALUE obj, VALUE x);  
-extern VALUE math\_cosh(VALUE obj, VALUE x);  
-extern VALUE math\_exp(VALUE obj, VALUE x);  
-extern VALUE math\_hypot(VALUE obj, VALUE x, VALUE y);  
-extern VALUE math\_log(int argc, VALUE \*argv);  
-extern VALUE math\_sin(VALUE obj, VALUE x);  
-extern VALUE math\_sinh(VALUE obj, VALUE x);  
-extern VALUE math\_sqrt(VALUE obj, VALUE x);  
+extern VALUE rb\_math\_atan2(VALUE obj, VALUE x, VALUE y);  
+extern VALUE rb\_math\_cos(VALUE obj, VALUE x);  
+extern VALUE rb\_math\_cosh(VALUE obj, VALUE x);  
+extern VALUE rb\_math\_exp(VALUE obj, VALUE x);  
+extern VALUE rb\_math\_hypot(VALUE obj, VALUE x, VALUE y);  
+extern VALUE rb\_math\_log(int argc, VALUE \*argv);  
+extern VALUE rb\_math\_sin(VALUE obj, VALUE x);  
+extern VALUE rb\_math\_sinh(VALUE obj, VALUE x);  
+extern VALUE rb\_math\_sqrt(VALUE obj, VALUE x);

-#define m\_atan2\_bang(x,y) math\_atan2(Qnil,x,y)  
-#define m\_cos\_bang(x) math\_cos(Qnil,x)  
-#define m\_cosh\_bang(x) math\_cosh(Qnil,x)  
-#define m\_exp\_bang(x) math\_exp(Qnil,x)  
-#define m\_hypot(x,y) math\_hypot(Qnil,x,y)  
+#define m\_atan2\_bang(x,y) rb\_math\_atan2(Qnil,x,y)  
+#define m\_cos\_bang(x) rb\_math\_cos(Qnil,x)  
+#define m\_cosh\_bang(x) rb\_math\_cosh(Qnil,x)  
+#define m\_exp\_bang(x) rb\_math\_exp(Qnil,x)  
+#define m\_hypot(x,y) rb\_math\_hypot(Qnil,x,y)

static VALUE  
m\_log\_bang(VALUE x)  
{

- return math\_log(1, &x);

- return rb\_math\_log(1, &x);  
}

-#define m\_sin\_bang(x) math\_sin(Qnil,x)  
-#define m\_sinh\_bang(x) math\_sinh(Qnil,x)  
-#define m\_sqrt\_bang(x) math\_sqrt(Qnil,x)  
+#define m\_sin\_bang(x) rb\_math\_sin(Qnil,x)  
+#define m\_sinh\_bang(x) rb\_math\_sinh(Qnil,x)  
+#define m\_sqrt\_bang(x) rb\_math\_sqrt(Qnil,x)

# static VALUE m\_cos(VALUE x) Index: math.c

— math.c (revision 19925)  
+++ math.c (working copy)  
@@ -82,7 +82,7 @@  
\*/

VALUE  
-math\_atan2(VALUE obj, VALUE y, VALUE x)  
+rb\_math\_atan2(VALUE obj, VALUE y, VALUE x)  
{  
Need\_Float2(y, x);  
return DBL2NUM(atan2(RFLOAT\_VALUE(y), RFLOAT\_VALUE(x)));  
@@ -98,7 +98,7 @@  
\*/

VALUE  
-math\_cos(VALUE obj, VALUE x)  
+rb\_math\_cos(VALUE obj, VALUE x)  
{  
Need\_Float(x);  
return DBL2NUM(cos(RFLOAT\_VALUE(x)));  
@@ -113,7 +113,7 @@  
\*/

VALUE  
-math\_sin(VALUE obj, VALUE x)  
+rb\_math\_sin(VALUE obj, VALUE x)  
{  
Need\_Float(x);

@@ -182,7 +182,7 @@  
\*/

static VALUE  
-math\_atan(VALUE obj, VALUE x)  
+rb\_math\_atan(VALUE obj, VALUE x)  
{  
Need\_Float(x);  
return DBL2NUM(atan(RFLOAT\_VALUE(x)));  
@@ -204,7 +204,7 @@  
\*/

VALUE  
-math\_cosh(VALUE obj, VALUE x)  
+rb\_math\_cosh(VALUE obj, VALUE x)  
{  
Need\_Float(x);

@@ -228,7 +228,7 @@  
\*/

VALUE  
-math\_sinh(VALUE obj, VALUE x)  
+rb\_math\_sinh(VALUE obj, VALUE x)  
{  
Need\_Float(x);  
return DBL2NUM(sinh(RFLOAT\_VALUE(x)));  
@@ -318,7 +318,7 @@  
\*/

VALUE  
-math\_exp(VALUE obj, VALUE x)  
+rb\_math\_exp(VALUE obj, VALUE x)  
{  
Need\_Float(x);  
return DBL2NUM(exp(RFLOAT\_VALUE(x)));  
@@ -344,7 +344,7 @@  
\*/

VALUE  
-math\_log(int argc, VALUE \*argv)  
+rb\_math\_log(int argc, VALUE \*argv)  
{  
VALUE x, base;  
double d;  
@@ -439,7 +439,7 @@  
\*/

VALUE  
-math\_sqrt(VALUE obj, VALUE x)  
+rb\_math\_sqrt(VALUE obj, VALUE x)  
{  
double d;

@@ -541,7 +541,7 @@  
\*/

VALUE  
-math\_hypot(VALUE obj, VALUE x, VALUE y)  
+rb\_math\_hypot(VALUE obj, VALUE x, VALUE y)  
{  
Need\_Float2(x, y);  
return DBL2NUM(hypot(RFLOAT\_VALUE(x), RFLOAT\_VALUE(y)));  
@@ -678,34 +678,34 @@  
rb\_define\_const(rb\_mMath, “E”, DBL2NUM(exp(1.0)));  
#endif

- rb\_define\_module\_function(rb\_mMath, “atan2”, math\_atan2, 2);
- rb\_define\_module\_function(rb\_mMath, “cos”, math\_cos, 1);
- rb\_define\_module\_function(rb\_mMath, “sin”, math\_sin, 1);

- rb\_define\_module\_function(rb\_mMath, “atan2”, rb\_math\_atan2, 2);

- rb\_define\_module\_function(rb\_mMath, “cos”, rb\_math\_cos, 1);

- rb\_define\_module\_function(rb\_mMath, “sin”, rb\_math\_sin, 1);  
rb\_define\_module\_function(rb\_mMath, “tan”, math\_tan, 1);

- rb\_define\_module\_function(rb\_mMath, “atan”, math\_atan, 1);

- rb\_define\_module\_function(rb\_mMath, “atan”, rb\_math\_atan, 1);

- rb\_define\_module\_function(rb\_mMath, “cosh”, math\_cosh, 1);
- rb\_define\_module\_function(rb\_mMath, “sinh”, math\_sinh, 1);

- rb\_define\_module\_function(rb\_mMath, “cosh”, rb\_math\_cosh, 1);

- rb\_define\_module\_function(rb\_mMath, “sinh”, rb\_math\_sinh, 1);  
rb\_define\_module\_function(rb\_mMath, “tanh”, math\_tanh, 1);

- rb\_define\_module\_function(rb\_mMath, “exp”, math\_exp, 1);
- rb\_define\_module\_function(rb\_mMath, “log”, math\_log, -1);

- rb\_define\_module\_function(rb\_mMath, “exp”, rb\_math\_exp, 1);
- rb\_define\_module\_function(rb\_mMath, “log”, rb\_math\_log, -1);  
rb\_define\_module\_function(rb\_mMath, “log2”, math\_log2, 1);  
rb\_define\_module\_function(rb\_mMath, “log10”, math\_log10, 1);

- rb\_define\_module\_function(rb\_mMath, “sqrt”, math\_sqrt, 1);

- rb\_define\_module\_function(rb\_mMath, “sqrt”, rb\_math\_sqrt, 1);  
rb\_define\_module\_function(rb\_mMath, “cbrt”, math\_cbrt, 1);

- rb\_define\_module\_function(rb\_mMath, “hypot”, math\_hypot, 2);

- rb\_define\_module\_function(rb\_mMath, “hypot”, rb\_math\_hypot, 2);

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---

<div class="post-metadata">

**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\
**Post date:** [October 25, 2008, 6:21pm UTC](https://www.ruby-forum.com/t/prefix-math-funcs/151717/2 "2008-10-25T18:21:02Z")

</div>

> complex.ce$B$G;H$&$?$a$K!"$$$/$D$+?t3X4X?t$+$ie(Bstatice$B$,$H$l$?$h$&$G$9$,!"e(B  
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---

<div class="post-metadata">

**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\
**Post date:** [October 27, 2008, 5:30pm UTC](https://www.ruby-forum.com/t/prefix-math-funcs/151717/3 "2008-10-27T17:30:52Z")

</div>

e$B:XF#$G$9!#e(B

On Sun, 26 Oct 2008 01:19:01 +0900  
Tadayoshi F. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> > complex.ce$B$G;H$&$?$a$K!"$$$/$D$+?t3X4X?t$+$ie(Bstatice$B$,$H$l$?$h$&$G$9$,!"e(B  
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> 
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# 

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---

<div class="post-metadata">

**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\
**Post date:** [October 27, 2008, 11:49pm UTC](https://www.ruby-forum.com/t/prefix-math-funcs/151717/4 "2008-10-27T23:49:28Z")

</div>

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:36962] Re: prefix math\_\* funcs”  
on Tue, 28 Oct 2008 03:17:46 +0900, Tadayoshi F.  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes:

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```
                            e$B$^$D$b$He(B e$B$f$-$R$me(B /:|)

```

---

<div class="post-metadata">

**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\
**Post date:** [October 27, 2008, 7:18pm UTC](https://www.ruby-forum.com/t/prefix-math-funcs/151717/5 "2008-10-27T19:18:47Z")

</div>

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---

<div class="post-metadata">

**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\
**Post date:** [October 28, 2008, 12:15am UTC](https://www.ruby-forum.com/t/prefix-math-funcs/151717/6 "2008-10-28T00:15:48Z")

</div>

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---

<div class="post-metadata">

**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\
**Post date:** [October 28, 2008, 12:37am UTC](https://www.ruby-forum.com/t/prefix-math-funcs/151717/7 "2008-10-28T00:37:26Z")

</div>

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:36964] Re: prefix math\_\* funcs”  
on Tue, 28 Oct 2008 08:14:22 +0900, Tadayoshi F.  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes:

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|\> e$B$J$I$”$+$i$5$^$Ke(BAPIe$B$H$J$k4X?t0J30$K$Oe(Brb\_e$B$J$I$Ne(Bprefixe$B$r$D$1$Fe(B  
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|  
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|  
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e$B$&!\<$s!“%i%$%V%i%j$NOC$+$!!#$^$”!“$”$s$^$j87L)$K30ItFbIt$H7he(B  
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```
                            e$B$^$D$b$He(B e$B$f$-$R$me(B /:|)

```

---

<div class="post-metadata">

**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\
**Post date:** [October 28, 2008, 5:31am UTC](https://www.ruby-forum.com/t/prefix-math-funcs/151717/8 "2008-10-28T05:31:03Z")

</div>

e$B$J$+$@$G$9!#e(B

At Tue, 28 Oct 2008 08:36:25 +0900,  
Yukihiro M. wrote in [ruby-dev:36965]:

> e$B$H$$$&$+!"8=:\_$NJ}?K$Oe(B
> 
> - e$B%7%s%%k$,30It$+$i8+$($k;~$K$Oe(Brb\_e$B$r$D$1$ke(B
> - e$B%7%s%%k$,\>-Mh30It$+$i8+$($k$h$&$K$J$k$+$b$7$l$J$$;~$K$Oe(B  
> rb\_e$B$r$D$1$ke(B

- 

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e$B$&$,$J$$$N$Ge(Brb\_e$B$r$D$1$?e(B