#include <config.h>

#include "inttostr.h"

/* Convert I to a printable string in BUF, which must be at least
   INT_BUFSIZE_BOUND (INTTYPE) bytes long. 
    Return the address of theprintable string, which need not start at BUF.  
    buf的长度必须大于等于INT_BUFSIZE_BOUND (INTTYPE) bytes long*/

char *
inttostr (inttype i, char *buf)
{
  char *p = buf + INT_STRLEN_BOUND (inttype);//p指向内存的尾端；
  *p = 0;//末端置0；

  if (i < 0)
    {
      do
    *--p = '0' - i % 10;
      while ((i /= 10) != 0);

      *--p = '-';
    }
  else
    {
      do
    *--p = '0' + i % 10;
      while ((i /= 10) != 0);
    }

  return p;
}