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/* expression, version 1.0 */
typedef int expr_var;
typedef struct {
double real;
double imag;
} fcomplex;
struct expression {
int nvars;
char **varnames;
fcomplex *varvals;
int nelem; /* number of elements in the vector. */
struct expr_elem *elems;
};
typedef double (*func_double)(double);
typedef double (*func_double_double)(double, double);
typedef void (*func_complex)(fcomplex *source, fcomplex*result);
typedef void (*func_complex_complex)(fcomplex *source1, fcomplex *source2, fcomplex*result);
struct expr_elem {
enum expr_op {
MONOP,
BINOP,
MONFUNC,
BINFUNC,
PUSHVAR,
PUSHNUM
} op;
union {
struct {
char op;
} monop;
struct {
char op;
} binop;
struct {
func_double func;
func_complex cfunc;
} monfunc;
struct {
func_double_double func;
func_complex_complex cfunc;
} binfunc;
struct {
int varnum;
} pushvar;
struct {
double number;
} pushnum;
} u;
};
extern struct expression *expr_new(void);
extern void expr_free(struct expression *);
extern char *expr_parse(struct expression *expr, char *e);
extern double expr_evaluate(struct expression *e);
extern void expr_evaluate_some(struct expression *e, expr_var v,
double min, double max, int npoints,
double *buffer);
extern void expr_evaluate_complex(struct expression *e, fcomplex *op);
extern expr_var expr_create_variable(struct expression *e, char *name,
double val);
extern void expr_set_variable(struct expression *e, expr_var v,
double val);
extern void expr_set_variable_complex(struct expression *e, expr_var v,
fcomplex *val);
extern double expr_get_variable(struct expression *e, expr_var v);
extern void expr_get_variable_complex(struct expression *e, expr_var v,
fcomplex *op);
extern void expr_copy_variables(struct expression *source, struct expression *dest);
extern struct expr_monfunc {
char *name;
func_double func;
func_complex cfunc;
} expr_monfuncs[];
extern struct expr_binfunc {
char *name;
func_double_double func;
func_complex_complex cfunc;
} expr_binfuncs[];
extern void fcomplex_re(fcomplex *,fcomplex *);
extern void fcomplex_im(fcomplex *,fcomplex *);
extern void fcomplex_abs(fcomplex *,fcomplex *);
extern void fcomplex_log(fcomplex *,fcomplex *);
extern void fcomplex_log10(fcomplex *,fcomplex *);
extern void fcomplex_sqrt(fcomplex *,fcomplex *);
extern void fcomplex_cos(fcomplex *,fcomplex *);
extern void fcomplex_arccos(fcomplex *,fcomplex *);
extern void fcomplex_sin(fcomplex *,fcomplex *);
extern void fcomplex_arcsin(fcomplex *,fcomplex *);
extern void fcomplex_tan(fcomplex *,fcomplex *);
extern void fcomplex_arctan(fcomplex *,fcomplex *);
extern void fcomplex_cot(fcomplex *,fcomplex *);
extern void fcomplex_sec(fcomplex *,fcomplex *);
extern void fcomplex_csc(fcomplex *,fcomplex *);
extern void fcomplex_cosh(fcomplex *,fcomplex *);
extern void fcomplex_sinh(fcomplex *,fcomplex *);
extern void fcomplex_tanh(fcomplex *,fcomplex *);
extern void fcomplex_arccosh(fcomplex *,fcomplex *);
extern void fcomplex_arcsinh(fcomplex *,fcomplex *);
extern void fcomplex_arctanh(fcomplex *,fcomplex *);
extern void fcomplex_floor(fcomplex *,fcomplex *);
extern void fcomplex_round(fcomplex *,fcomplex *);
extern void fcomplex_ceiling(fcomplex *,fcomplex *);
extern void fcomplex_exp(fcomplex *,fcomplex *);
extern void fcomplex_pow(fcomplex *,fcomplex *,fcomplex *);
extern void fcomplex_atan2(fcomplex *,fcomplex *,fcomplex *);
extern double freal_re(double);
extern double freal_im(double);
extern double freal_cot(double);
extern double freal_sec(double);
extern double freal_csc(double);
extern void fcomplex_monstub(fcomplex *,fcomplex *);
extern void fcomplex_binstub(fcomplex *,fcomplex *, fcomplex *);
extern double freal_monstub(double);
extern double freal_binstub(double,double);
#define DEFAULT_EXPR_MONFUNCS \
{"re", freal_re, fcomplex_re}, \
{"im", freal_im, fcomplex_im}, \
{"abs", fabs, fcomplex_abs}, \
{"log", log, fcomplex_log}, \
{"log10", log10, fcomplex_log10}, \
{"sqrt", sqrt, fcomplex_sqrt}, \
{"cos", cos, fcomplex_cos}, \
{"arccos", acos, fcomplex_arccos}, \
{"sin", sin, fcomplex_sin}, \
{"arcsin", asin, fcomplex_arcsin}, \
{"tan", tan, fcomplex_tan}, \
{"arctan", atan, fcomplex_arctan}, \
{"cot", freal_cot, fcomplex_cot}, \
{"sec", freal_sec, fcomplex_sec}, \
{"csc", freal_csc, fcomplex_csc}, \
{"cosh", cosh, fcomplex_cosh}, \
{"sinh", sinh, fcomplex_sinh}, \
{"tanh", tanh, fcomplex_tanh}, \
{"arccosh", acosh, fcomplex_arccosh}, \
{"arcsinh", asinh, fcomplex_arcsinh}, \
{"arctanh", atanh, fcomplex_arctanh}, \
{"floor", floor, fcomplex_floor}, \
{"round", rint, fcomplex_round}, \
{"ceiling", ceil, fcomplex_ceiling}, \
{"exp", exp, fcomplex_exp}
#define DEFAULT_EXPR_BINFUNCS \
{"pow", pow, fcomplex_pow}, \
{"arctan2", atan2, fcomplex_atan2}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.