stdlib.h

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#ifndef __STDLIB_H__
#define __STDLIB_H__

//#include <stdarg.h>
#include<stddef.h>

#define FALSE       0
#define TRUE        1

char *itoa(unsigned int num)
{
   static char buf[12];
   static char buf2[12];
   int i,j;

   if (num==0)
   {
      buf[0] = '0';
      buf[1] = '\0';
      return &buf[0];
   }

   for(i=0;i<11 && num!=0;i++)
   {
      buf[i]=(char)((num%10)+'0');
      num/=10;
   }
   buf2[i] = '\0';
   j = 0;
   i--;
   for(;i>=0;i--){
         buf2[i]=buf[j];
         j++;
   }
   return &buf2[0];
}


char *itoh(unsigned int num)
{
   static char buf[11];
   int i;
   buf[10]=0;

   buf[0] = '0';
   buf[1] = 'x';

   if (num==0)
   {
      buf[2] = '0';
      buf[3] = '0';
      buf[4] = '0';
      buf[5] = '0';
      buf[6] = '0';
      buf[7] = '0';
      buf[8] = '0';
      buf[9] = '0';
      return buf;
   }

   for(i=9;i>=2;--i)
   {
      if ((num%16) < 10)
         buf[i]=(char)((num%16)+'0');
      else
         buf[i]=(char)((num%16)+'W');

      num/=16;
   }

   return buf;
}

int abs(int num)
{
    if(num<0) return -num;
    else return num;
}

int rand(int seed, int min, int max)
{ 
    int lfsr = seed;
    
    lfsr = (lfsr >> 1) ^ (-(lfsr & 1u) & 0xB400u);
    
    return (lfsr % max + min);
} 

int add(int a, int b)
{
    int res;

    res=a+b;
    return res;
}


int sub(int a, int b)
{
    int res;

    res=a-b;
    return res;
}

void *memset(void *dst, int c, unsigned long bytes) {

   unsigned char *Dst = (unsigned char*)dst;

   while((int)bytes-- > 0)
      *Dst++ = (unsigned char)c;

   return dst;
}

char *fixetoa(int nume)
{
    static char buf[13];
    static char buf2[13];
    int i,j;
    int num=nume;

    if (num<0)
    {
        num=num*(-1);

        for(i=0;i<12 && (num!=0 || i<5) ;i++)
        {
            if (num==0)
                buf[i]='0';
            else
            {
                  buf[i]=(char)((num%10)+'0');
                  num/=10;
            }
        }
        
        i++;
        i++;
        buf2[i] = '\0';
        j = 0;
        i--;

        for(;i>=0;i--)
        {
            if(j==4)
            {
                buf2[i]='.';
                i--;
            }              
                buf2[i]=buf[j];
                j++;
        }

        buf2[0]='-';
        return &buf2[0];
    }
    else
    {
        if (num==0)
        {
            buf[0] = '0';
            buf[1] = '\0';
            return &buf[0];
        }

        for(i=0;i<12 && (num!=0 || i<5);i++)
        {
            if (num==0)
                  buf[i]='0';                 
            else
            {
                  buf[i]=(char)((num%10)+'0');
                  num/=10;
            }
        }
        
        i++;
        buf2[i] = '\0';
        j = 0;
        i--;
        for(;i>=0;i--)
        {
            if(j==4)
            {
                buf2[i]='.';
                i--;
            }              
            buf2[i]=buf[j];
            j++;
        }
        return &buf2[0];
    }
}

char *strcpy(char *dst, const char *src) {

    char *dstSave=dst;
    int c;

    do {
        c = *dst++ = *src++;
    } while(c);

   return dstSave;
}

/*void memcpy(unsigned int *dest, const unsigned int *src, size_t n) {

    unsigned int i = n/4;

    while(i--)
        dest[i] = src[i];
}*/

int strlen(const char *string) {

   const char *base=string;

   while(*string++) ;

   return string - base - 1;
}

#endif