1 | #ifndef MAD_EXPR_H |
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2 | #define MAD_EXPR_H |
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3 | |
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4 | // types |
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5 | |
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6 | struct int_array; |
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7 | struct double_array; |
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8 | struct el_list; |
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9 | struct var_list; |
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10 | |
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11 | struct expression |
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12 | { |
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13 | char name[NAME_L]; |
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14 | char* string; /* expression in string form */ |
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15 | int status; /* status flag: 0 not evaluated |
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16 | 1 evaluated */ |
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17 | struct int_array* polish; /* pointer to Polish notation, or NULL */ |
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18 | double value; /* actual value */ |
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19 | int stamp; |
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20 | }; |
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21 | |
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22 | struct expr_list |
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23 | { |
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24 | int stamp; |
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25 | char name[NAME_L]; |
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26 | int max, /* max. pointer array size */ |
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27 | curr; /* current occupation */ |
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28 | struct expression** list; /* expression pointer list */ |
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29 | }; |
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30 | |
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31 | // interface |
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32 | |
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33 | struct expression* make_expression(int n, char** toks); |
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34 | struct expression* new_expression(char* in_string, struct int_array*); |
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35 | struct expression* clone_expression(struct expression*); |
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36 | struct expression* delete_expression(struct expression*); |
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37 | struct expression* scale_expr(struct expression*, double scale); |
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38 | struct expression* compound_expr(struct expression*, double v1, char* oper, struct expression*, double v2); |
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39 | double expr_combine(struct expression*, double v1, char* oper, struct expression*, double v2, struct expression**); |
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40 | double expression_value(struct expression*, int flag); /* recursive */ |
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41 | void dump_expression(struct expression*); |
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42 | |
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43 | struct expr_list* new_expr_list(int length); |
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44 | struct expr_list* clone_expr_list(struct expr_list*); |
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45 | struct expr_list* delete_expr_list(struct expr_list*); |
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46 | void grow_expr_list(struct expr_list*); |
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47 | void fill_expr_list(char** toks, int s_start, int s_end, struct expr_list*); |
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48 | void fill_expr_var_list(struct el_list*, struct expression*, struct var_list*); |
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49 | void update_vector(struct expr_list*, struct double_array*); |
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50 | |
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51 | double double_from_expr(char** toks, int s_start, int s_end); |
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52 | int loc_expr(char** items, int nit, int start, int* end); |
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53 | int scan_expr(int c_item, char** item); |
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54 | |
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55 | #endif // MAD_EXPR_H |
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56 | |
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