62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
#ifndef __EXPRTREE_H__
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#define __EXPRTREE_H__
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#ifdef USE_TREE
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typedef double (*function) (double*);
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#else
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typedef void (*function) (double);
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#endif
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typedef char ident[64];
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typedef struct _exprtree
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{
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int type;
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union
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{
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double number;
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struct
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{
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int numArgs;
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function routine;
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struct _exprtree *args;
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} func;
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struct
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{
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struct _exprtree *left;
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struct _exprtree *right;
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} operator;
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} val;
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struct _exprtree *next;
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} exprtree;
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#define EXPR_NUMBER 1
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#define EXPR_ADD 2
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#define EXPR_SUB 3
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#define EXPR_MUL 4
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#define EXPR_DIV 5
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#define EXPR_MOD 6
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#define EXPR_NEG 7
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#define EXPR_FUNC 8
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#define EXPR_VAR_X 9
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#define EXPR_VAR_Y 10
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#define EXPR_VAR_R 11
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#define EXPR_VAR_A 12
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#define EXPR_VAR_W 13
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#define EXPR_VAR_H 14
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#define EXPR_VAR_BIG_R 15
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#define EXPR_VAR_BIG_X 16
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#define EXPR_VAR_BIG_Y 17
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exprtree* make_number (double num);
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exprtree* make_var (char *name);
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exprtree* make_operator (int type, exprtree *left, exprtree *right);
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exprtree* make_function (char *name, exprtree *args);
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exprtree* arglist_append (exprtree *list1, exprtree *list2);
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double eval_exprtree (exprtree *tree);
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#endif
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