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1 #ifndef DMEVAL_H
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2 #define DMEVAL_H
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3
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4 #include "dmlib.h"
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5
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6
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7 typedef double DMValue;
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8 #define DMCONVTYPE (int)
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9
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10
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11 enum
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12 {
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13 OP_NONE,
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14
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15 OP_ADD,
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16 OP_SUB,
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17 OP_MUL,
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18 OP_DIV,
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19 OP_MOD,
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20
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21 OP_LSHIFT,
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22 OP_RSHIFT,
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23
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24 OP_AND,
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25 OP_OR,
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26 OP_XOR,
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27
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28 OP_FUNC,
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29 OP_VAR,
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30 OP_SUBEXPR,
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31 OP_CONST,
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32
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33 OP_NOPERS
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34 } DMOperType;
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35
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36 enum
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37 {
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38 ID_FUNC,
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39 ID_VAR
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40 } DMEvalIdType;
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41
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42
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43 typedef struct
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44 {
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45 char *name;
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46 int type;
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47 DMValue (*func)(DMValue);
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48 DMValue *var;
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49 } DMEvalId;
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50
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51
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52 typedef struct DMEvalNode
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53 {
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54 int op;
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55 DMValue val;
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56 DMEvalId *id;
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57
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58 struct DMEvalNode *subexpr, *next, *prev;
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59 } DMEvalNode;
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60
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61
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62 typedef struct
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63 {
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64 BOOL err;
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65 char *errStr;
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66
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67 int nids;
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68 DMEvalId *ids;
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69
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70 int mode, prev, expect;
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71 } DMEvalContext;
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72
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73
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74 DMEvalId *dm_eval_find_id(DMEvalContext *ev, const char *name);
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75 DMEvalId *dm_eval_add_var(DMEvalContext *ev, const char *name, DMValue *var);
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76 DMEvalId *dm_eval_add_func(DMEvalContext *ev, const char *name, DMValue (*func)(DMValue));
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77
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78 DMEvalContext *dm_eval_new(void);
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79 void dm_eval_close(DMEvalContext *ev);
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80 void dm_eval_free(DMEvalNode *node);
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81 void dm_eval_clear_err(DMEvalContext *ev);
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82
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83 int dm_eval_parse_expr(DMEvalContext *ev, char *expr, DMEvalNode **result);
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84 int dm_eval_reorder(DMEvalContext *ev, DMEvalNode *node, DMEvalNode **result);
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85 int dm_eval_exec(DMEvalContext *ev, DMEvalNode *tree, DMValue *presult);
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86
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87 void dm_print_optree(DMEvalContext *ev, DMEvalNode *node);
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88
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89
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90 #endif // DMEVAL_H
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