#include <_mingw.h>

#define REMATH(x)  double __cdecl x( double f ); float x##f(float v) { return x(v); }

REMATH( acos );
REMATH( cos );
REMATH( sin );
REMATH( sqrt );
REMATH( asin );

double __cdecl strtod (const char* str, char** endptr);
float strtof( const char* str, char** endptr)
{
	return strtod( str, endptr );
}

double __cdecl atan2(double a, double b);
float atan2f(float a, float b)
{
	return atan2( a, b );
}

//From http://stackoverflow.com/questions/40159892/using-asprintf-on-windows
int __cdecl vsprintf_s(  
   char *buffer,  
   size_t numberOfElements,  
   const char *format,  
   va_list argptr   
);   

int asprintf(char **strp, const char *fmt, ...) {
    va_list ap;
    va_start(ap, fmt);
    int r = vasprintf(strp, fmt, ap);
    va_end(ap);
    return r;
}

int vasprintf(char **strp, const char *fmt, va_list ap) {
    // _vscprintf tells you how big the buffer needs to be
    int len = _vscprintf(fmt, ap);
    if (len == -1) {
        return -1;
    }
    size_t size = (size_t)len + 1;
    char *str = (char*)malloc(size);
    if (!str) {
        return -1;
    }
    // _vsprintf_s is the "secure" version of vsprintf
    int r = vsprintf_s(str, len + 1, fmt, ap);
    if (r == -1) {
        free(str);
        return -1;
    }
    *strp = str;
    return r;
}