Implemented math.h

libc/include/math.h

@@ -2,15 +2,68 @@
 #define _MATH_H
 
 // Constants
-#define PI 3.141592653589 // Should be good enough
-#define E  2.718281828459
+#define M_E        2.71828182845904523536   // e
+#define M_LOG2E    1.44269504088896340736   // log_2 e
+#define M_LOG10E   0.43429448190325182765   // log_10 e
+#define M_LN2      0.69314718055994530941   // ln(2)
+#define M_LN10     2.30258509299404568402   // ln(10)
+#define M_PI       3.14159265358979323846   // pi
+#define M_PI_2     1.57079632679489661923   // pi/2
+#define M_PI_4     0.78539816339744830961   // pi/4
+#define M_1_PI     0.31830988618379067153   // 1/pi
+#define M_2_PI     0.63661977236758134307   // 2/pi
+#define M_SQRT2    1.41421356237309504880   // sqrt(2)
+#define M_SQRT1_2  0.70710678118654752440   // 1/sqrt(2)
 
-// Macros
-#define abs(x) ( (x) > 0 ? (x) : -(x) )
-#define sign(x) ( (x) == 0 ? 0 : ((x) < 0 ? -1 : 1 ) )
+// TODO:
+#define NAN         (__builtin_inff())
+#define INFINITY    (__builtin_nanf(""))
 
-#define floor(x) ( (int)(x) ) // C floors floats when converting to ints
-#define round(x) ( (int)((x) + 0.5) ) // Normal rounding
-#define ceil(x)  ( (int)((x) + 1) ) // Always rounds up
+// Absolute value
+int abs(int n);
+double fabs(double n);
+
+// Exponential & logarithmic
+double exp(double x);
+double exp2(double x);
+double log(double x);
+double log2(double x);
+double log10(double x);
+double logn(double x, double n);
+
+// Power
+double sqrt(double x);
+double cbrt(double x);
+double hypot(double x, double y);
+double pow(double base, double expn);
+
+// Trigonometric
+double sin(double x);
+double cos(double x);
+double tan(double x);
+double asin(double x);
+double acos(double x);
+double atan(double x);
+double atan2(double y, double x);
+
+// Hyperbolic
+double sinh(double x);
+double cosh(double x);
+double tanh(double x);
+
+// Rounding & remainder
+double floor(double x);
+double ceil(double x);
+double round(double x);
+double trunc(double x);
+double fmod(double x, double y);
+double modf(double x, double* iptr);
+
+// Error handling
+double nan(const char* tagp);
+double inf();
+int isfinite(double x);
+int isinf(double x);
+int isnan(double x);
 
 #endif

libc/include/syscall.h

@@ -6,15 +6,15 @@
 #define MAX_SYSCALLS 9
 
 typedef enum {
-    SYS_RESERVED,
-    SYS_SLEEP, 
+    SYS_EXIT,
     SYS_READ,
     SYS_WRITE,
     SYS_OPEN,
     SYS_CLOSE,
+    SYS_SEEK,
     SYS_MALLOC,
     SYS_FREE,
-    SYS_SEEK,
+    SYS_SLEEP,
 } SYSCALL_NUMBERS;
 
 typedef enum {