tinyexpr.h

 
#ifndef __TINYEXPR_H__
#define __TINYEXPR_H__
 
#define TE_NAT_LOG
 
#include "strptrmap.h"
#include <stdio.h>
 
typedef struct te_expr {
    int type;
    union {
        double value;
        const double *bound;
        void *function;
    };
    void *parameters[1];
} te_expr;
 
enum {
    TE_VARIABLE = 0,
 
    TE_FUNCTION0 = 8, TE_FUNCTION1, TE_FUNCTION2, TE_FUNCTION3,
    TE_FUNCTION4, TE_FUNCTION5, TE_FUNCTION6, TE_FUNCTION7,
 
    TE_CLOSURE0 = 16, TE_CLOSURE1, TE_CLOSURE2, TE_CLOSURE3,
    TE_CLOSURE4, TE_CLOSURE5, TE_CLOSURE6, TE_CLOSURE7,
 
    TE_FLAG_PURE = 32
};
 
typedef struct te_variable {
    void *address;
    int type;
    void *context;
} te_variable;
 
te_variable *te_variable_new(void *address);
void te_free_variables(StrPtrMap *pars);
 
double te_interp(const char *expression, int *error);
 
te_expr *te_compile(const char *expression, StrPtrMap * varmap,
                    int *error);
 
double te_eval(const te_expr * n);
 
void te_print(const te_expr * n, FILE * fp);
 
int te_dependencies(const te_expr *self, int len, const double *ptr[len]);
 
/* This is safe to call on NULL pointers. */
void te_free(te_expr * n);
 
void te_free_func_map(void);
 
#endif /*__TINYEXPR_H__*/