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/*@@
@header util_Expression.h
@date Tue Sep 19 22:02:45 2000
@author Tom Goodale
@desc
Header for expression stuff.
@enddesc
@version $Header$
@@*/
#ifndef __UTIL_EXPRESSION_H__
#define __UTIL_EXPRESSION_H__ 1
#ifdef __cplusplus
extern "C"
{
#endif
/* Structure to hold values. */
typedef struct
{
enum {rval,ival} type;
union
{
double rval;
int ival;
} value;
} uExpressionValue;
#ifndef __UTILI_EXPRESSION_H__
/* Externally visible representation of the expression. */
typedef void *uExpression;
#endif /*__UTIL_EXPRESSION_H__ */
uExpression Util_ExpressionParse(const char *expression);
int Util_ExpressionEvaluate(const uExpression buffer,
uExpressionValue *retval,
int (*eval)(int, const char * const *, uExpressionValue *, void *),
void *data);
void Util_ExpressionFree(uExpression buffer);
#ifdef __cplusplus
}
#endif
#endif /* __UTIL_EXPRESSION_H__ */
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