Feat: added math library

Used Plan9's libc as starting point. This cleans up dangling references
due to loss of libc.

2 files changed, 46 insertions, 1 deletions

diff --git a/include/base/math.h b/include/base/math.h
new file mode 100644
index 0000000..69d344e
--- /dev/null
+++ b/include/base/math.h
@@ -0,0 +1,39 @@
+#pragma once
+
+double	math·NaN(void);
+double	math·Inf(int);
+int	    math·isNaN(double);
+int	    math·isInf(double, int);
+ulong	math·umuldiv(ulong, ulong, ulong);
+long	math·muldiv(long, long, long);
+
+double	math·pow(double, double);
+double	math·atan2(double, double);
+double	math·fabs(double);
+double	math·atan(double);
+int     math·abs(int);
+long	math·labs(long);
+double	math·ldexp(double, int);
+double	math·log(double);
+double	math·log10(double);
+double	math·exp(double);
+double	math·floor(double);
+double	math·ceil(double);
+double	math·sin(double);
+double	math·cos(double);
+double	math·tan(double);
+double	math·asin(double);
+double	math·acos(double);
+double	math·sinh(double);
+double	math·cosh(double);
+double	math·tanh(double);
+double	math·sqrt(double);
+double	math·fmod(double, double);
+double	math·modf(double, double*);
+double	math·frexp(double, int*);
+
+double  math·copysign(double, double);
+
+#define	math·HUGE	3.4028234e38
+#define	math·PIO2	1.570796326794896619231e0
+#define	math·PI	    (math·PIO2+math·PIO2)
diff --git a/include/base/string.h b/include/base/string.h
index 238ebf9..a59c553 100644
--- a/include/base/string.h
+++ b/include/base/string.h
@@ -29,9 +29,15 @@ int      str·compare(char *, char *);
 int      str·ncompare(char *, intptr len, char *);
 int      str·ecompare(char *, char *end, char *);
 
-int      str·atoi(char *s);
+/* old school interfaces (no error checking) */
+long     str·atoi(char *s);
+double   str·atof(char *s);
 char    *str·itoa(char *s, int x);
 
+/* nicer  */
+vlong    str·asint(char *s, char **end);
+double   str·asfloat(char *s, char **end);
+
 /* augmented string functions */
 string  string·makecap(char *s, vlong len, vlong cap);
 string  string·makelen(char *s, vlong len);