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#ifndef KBW_VARIABLES
#define KBW_VARIABLES
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if HAVE_STRING_H
# include <string.h>
#else
# if !HAVE_STRCHR
# define strchr index
# define strrchr rindex
# endif
char *strchr(), *strrchr();
#endif
#include <stdlib.h>
#include <stdio.h>
#include <gmp.h>
#include <mpfr.h>
struct variable
{
char *key;
char *expression;
char *description;
mpfr_t value;
unsigned int exp:1;
struct variable *next;
};
struct answer
{
mpfr_t val;
char *exp;
char *desc;
unsigned int err:1;
};
// requires a working mpfr_t
void getvarval(mpfr_t out, char *key);
// requires a working mpfr_t (duh)
int putval(char *key, mpfr_t value, char *desc);
int putexp(char *key, char *value, char *desc);
int varexists(char *key);
void initvar(void);
void delnvar(size_t);
void cleanupvar(void);
size_t numvars();
/* ******************************
* NOTE!
* If you use these functions, they return
* fully functioning mpfr_t structures that must be
* mpfr_clear()'d when you're done with 'em.
*/
/* getvar returns only the value, or an error if it doesn't have one */
struct answer getvar(char *key);
/* getvar returns whatever is known about the variable, or an error if
* it doesn't exist */
struct answer getvar_full(char *key);
/* THIS function, however, exposes the innards of the variable system.
* do not under any circumstance un-initialize the mpfr_t
*/
struct variable *getrealnvar(size_t);
#endif
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