+
+#define RUBIN_REG_SIZE 16
+#define UPPER_BIT_RUBIN (((long) 1)<<(RUBIN_REG_SIZE-1))
+#define LOWER_BITS_RUBIN ((((long) 1)<<(RUBIN_REG_SIZE-1))-1)
+
+
+#define BIT_DIVIDER_MIPS 1043
+static int bits_mips[8] = { 277,249,290,267,229,341,212,241}; /* mips32 */
+
+#include <linux/errno.h>
+
+struct pushpull {
+ unsigned char *buf;
+ unsigned int buflen;
+ unsigned int ofs;
+ unsigned int reserve;
+};
+
+struct rubin_state {
+ unsigned long p;
+ unsigned long q;
+ unsigned long rec_q;
+ long bit_number;
+ struct pushpull pp;
+ int bit_divider;
+ int bits[8];
+};
+
+static inline void init_pushpull(struct pushpull *pp, char *buf, unsigned buflen, unsigned ofs, unsigned reserve)
+{
+ pp->buf = buf;
+ pp->buflen = buflen;
+ pp->ofs = ofs;
+ pp->reserve = reserve;
+}
+
+static inline int pushbit(struct pushpull *pp, int bit, int use_reserved)
+{
+ if (pp->ofs >= pp->buflen - (use_reserved?0:pp->reserve)) {
+ return -ENOSPC;
+ }
+
+ if (bit) {
+ pp->buf[pp->ofs >> 3] |= (1<<(7-(pp->ofs &7)));
+ }
+ else {
+ pp->buf[pp->ofs >> 3] &= ~(1<<(7-(pp->ofs &7)));
+ }
+ pp->ofs++;
+
+ return 0;
+}
+
+static inline int pushedbits(struct pushpull *pp)
+{
+ return pp->ofs;
+}
+
+static inline int pullbit(struct pushpull *pp)
+{
+ int bit;
+
+ bit = (pp->buf[pp->ofs >> 3] >> (7-(pp->ofs & 7))) & 1;
+
+ pp->ofs++;
+ return bit;
+}
+
+static inline int pulledbits(struct pushpull *pp)
+{
+ return pp->ofs;
+}
+
+