1 | /**
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2 | ** @file mruby/range.h - Range class
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3 | **
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4 | ** See Copyright Notice in mruby.h
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5 | */
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6 |
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7 | #ifndef MRUBY_RANGE_H
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8 | #define MRUBY_RANGE_H
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9 |
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10 | #include "common.h"
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11 |
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12 | /**
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13 | * Range class
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14 | */
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15 | MRB_BEGIN_DECL
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16 |
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17 | #if defined(MRB_NAN_BOXING) && defined(MRB_64BIT) || defined(MRB_WORD_BOXING)
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18 | # define MRB_RANGE_EMBED
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19 | #endif
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20 |
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21 | #ifdef MRB_RANGE_EMBED
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22 | struct RRange {
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23 | MRB_OBJECT_HEADER;
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24 | mrb_value beg;
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25 | mrb_value end;
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26 | mrb_bool excl;
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27 | };
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28 | # define mrb_gc_free_range(mrb, p) ((void)0)
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29 | # define RANGE_BEG(p) ((p)->beg)
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30 | # define RANGE_END(p) ((p)->end)
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31 | #else
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32 | typedef struct mrb_range_edges {
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33 | mrb_value beg;
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34 | mrb_value end;
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35 | } mrb_range_edges;
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36 | struct RRange {
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37 | MRB_OBJECT_HEADER;
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38 | mrb_range_edges *edges;
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39 | mrb_bool excl;
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40 | };
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41 | # define mrb_gc_free_range(mrb, p) mrb_free(mrb, (p)->edges)
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42 | # define RANGE_BEG(p) ((p)->edges->beg)
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43 | # define RANGE_END(p) ((p)->edges->end)
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44 | #endif
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45 |
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46 | #define mrb_range_beg(mrb, r) RANGE_BEG(mrb_range_ptr(mrb, r))
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47 | #define mrb_range_end(mrb, r) RANGE_END(mrb_range_ptr(mrb, r))
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48 | #define mrb_range_excl_p(mrb, r) RANGE_EXCL(mrb_range_ptr(mrb, r))
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49 | #define mrb_range_raw_ptr(r) ((struct RRange*)mrb_ptr(r))
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50 | #define mrb_range_value(p) mrb_obj_value((void*)(p))
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51 | #define RANGE_EXCL(p) ((p)->excl)
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52 |
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53 | MRB_API struct RRange* mrb_range_ptr(mrb_state *mrb, mrb_value range);
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54 |
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55 | /*
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56 | * Initializes a Range.
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57 | *
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58 | * If the third parameter is FALSE then it includes the last value in the range.
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59 | * If the third parameter is TRUE then it excludes the last value in the range.
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60 | *
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61 | * @param start the beginning value.
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62 | * @param end the ending value.
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63 | * @param exclude represents the inclusion or exclusion of the last value.
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64 | */
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65 | MRB_API mrb_value mrb_range_new(mrb_state *mrb, mrb_value start, mrb_value end, mrb_bool exclude);
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66 |
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67 | enum mrb_range_beg_len {
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68 | MRB_RANGE_TYPE_MISMATCH = 0, /* (failure) not range */
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69 | MRB_RANGE_OK = 1, /* (success) range */
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70 | MRB_RANGE_OUT = 2 /* (failure) out of range */
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71 | };
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72 |
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73 | MRB_API enum mrb_range_beg_len mrb_range_beg_len(mrb_state *mrb, mrb_value range, mrb_int *begp, mrb_int *lenp, mrb_int len, mrb_bool trunc);
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74 | mrb_value mrb_get_values_at(mrb_state *mrb, mrb_value obj, mrb_int olen, mrb_int argc, const mrb_value *argv, mrb_value (*func)(mrb_state*, mrb_value, mrb_int));
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75 | void mrb_gc_mark_range(mrb_state *mrb, struct RRange *r);
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76 |
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77 | MRB_END_DECL
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78 |
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79 | #endif /* MRUBY_RANGE_H */
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