shifter.h

#ifndef SHIFTER_H
#define SHIFTER_H
#include <stdint.h>
// NOTE: this isn't really metrics specific but quite generic
 
typedef struct shifter {
  int           bufsize;        // max size of buffer
  int           validbytes;     // valid bytes in buffer
  int           error;          // if non-zero, an error occured
  uint8_t *     buf;
} _shifter;
 
// init a shifter for first use
void shifter_init(struct shifter *sh, uint8_t *buf, int bufsize);
void shift_into_uint8(struct shifter *sh, uint8_t b);
void shift_into_uint32(struct shifter *sh, uint32_t b);
void shift_into_uint64(struct shifter *sh, uint64_t b);
// return number of bytes shifted into buffer
int shift_size(struct shifter *sh);
// if non-zero an error occured on this shifter
int shift_error(struct shifter *sh);
#endif