/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
   It is considered beerware. Prost. Skol. Cheers or whatever.

   $id$ */

#ifndef OT_HEX_H__
#define OT_HEX_H__

#include <stdint.h>

#include "trackerlogic.h"

/* Write hash as forty upper case hex digits followed by a terminating zero.
   dest must have room for forty one bytes. Returns dest. */
char *hex_fromhash(char *dest, const uint8_t *hash);

/* Read forty hex digits from src into hash. Returns non-zero on success.
   On failure hash is left untouched and no byte of src beyond the offending
   character is read, so src need not be forty characters long. */
int   hex_tohash(ot_hash hash, const char *src);

/* Non-zero if c is a hexadecimal digit, in either case. */
int   hex_isdigit(int c);

/* The value of a hexadecimal digit, or -1 if c is not one. Shared with the
   address scanner so that both agree on what a digit is. */
int   hex_value(int c);

#endif