#include "f2c.h"
#ifdef __cplusplus
extern "C" {
#endif

#ifndef LONGBITS
#define LONGBITS 32
#endif

 integer
#ifdef KR_headers
lbit_bits(a, b, len) integer a, b, len;
#else
lbit_bits(integer a, integer b, integer len)
#endif
{
  /* Assume 2's complement arithmetic */

  unsigned long x, y;

  x = (unsigned long) a;
  y = (unsigned long)-1L;
  x >>= b;
  y <<= len;
  return (integer)(x & ~y);
  }

 integer
#ifdef KR_headers
lbit_cshift(a, b, len) integer a, b, len;
#else
lbit_cshift(integer a, integer b, integer len)
#endif
{
  unsigned long x, y, z;

  x = (unsigned long)a;
  if(len <= 0) {
         if(len == 0)
                return 0;
         goto full_len;
         }
  if(len >= LONGBITS) {
 full_len:
         if(b >= 0) {
                b %= LONGBITS;
                return (integer)(x << b | x >> (LONGBITS -b) );
                }
         b = -b;
         b %= LONGBITS;
         return (integer)(x << (LONGBITS - b) | x >> b);
         }
  y = z = (unsigned long)-1;
  y <<= len;
  z &= ~y;
  y &= x;
  x &= z;
  if(b >= 0) {
         b %= len;
         return (integer)(y | (z & (x << b | x >> (len - b))));
         }
  b = -b;
  b %= len;
  return (integer)(y | (z & (x >> b | x << (len - b))));
  }
#ifdef __cplusplus
}
#endif
