[270] | 1 | /*
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| 2 | ** range.c - 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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[331] | 7 | #include <mruby.h>
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| 8 | #include <mruby/class.h>
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| 9 | #include <mruby/range.h>
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| 10 | #include <mruby/string.h>
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| 11 | #include <mruby/array.h>
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[270] | 12 |
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[439] | 13 | #define RANGE_INITIALIZED_MASK 1
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| 14 | #define RANGE_INITIALIZED(p) ((p)->flags |= RANGE_INITIALIZED_MASK)
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| 15 | #define RANGE_INITIALIZED_P(p) ((p)->flags & RANGE_INITIALIZED_MASK)
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[270] | 16 |
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| 17 | static void
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[439] | 18 | r_check(mrb_state *mrb, mrb_value a, mrb_value b)
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[270] | 19 | {
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| 20 | enum mrb_vtype ta;
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| 21 | enum mrb_vtype tb;
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[439] | 22 | mrb_int n;
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[270] | 23 |
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| 24 | ta = mrb_type(a);
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| 25 | tb = mrb_type(b);
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[439] | 26 | #ifdef MRB_WITHOUT_FLOAT
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| 27 | if (ta == MRB_TT_FIXNUM && tb == MRB_TT_FIXNUM ) {
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| 28 | #else
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[270] | 29 | if ((ta == MRB_TT_FIXNUM || ta == MRB_TT_FLOAT) &&
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| 30 | (tb == MRB_TT_FIXNUM || tb == MRB_TT_FLOAT)) {
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[439] | 31 | #endif
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[270] | 32 | return;
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| 33 | }
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| 34 |
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[439] | 35 | n = mrb_cmp(mrb, a, b);
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| 36 | if (n == -2) { /* can not be compared */
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[270] | 37 | mrb_raise(mrb, E_ARGUMENT_ERROR, "bad value for range");
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| 38 | }
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| 39 | }
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| 40 |
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[439] | 41 | static mrb_bool
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| 42 | r_le(mrb_state *mrb, mrb_value a, mrb_value b)
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[270] | 43 | {
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[439] | 44 | mrb_int n = mrb_cmp(mrb, a, b);
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[270] | 45 |
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[439] | 46 | if (n == 0 || n == -1) return TRUE;
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| 47 | return FALSE;
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| 48 | }
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| 49 |
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| 50 | static mrb_bool
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| 51 | r_gt(mrb_state *mrb, mrb_value a, mrb_value b)
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| 52 | {
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| 53 | return mrb_cmp(mrb, a, b) == 1;
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| 54 | }
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| 55 |
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| 56 | static mrb_bool
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| 57 | r_ge(mrb_state *mrb, mrb_value a, mrb_value b)
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| 58 | {
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| 59 | mrb_int n = mrb_cmp(mrb, a, b);
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| 60 |
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| 61 | if (n == 0 || n == 1) return TRUE;
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| 62 | return FALSE;
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| 63 | }
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| 64 |
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| 65 | static void
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| 66 | range_ptr_alloc_edges(mrb_state *mrb, struct RRange *r)
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| 67 | {
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| 68 | #ifndef MRB_RANGE_EMBED
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[270] | 69 | r->edges = (mrb_range_edges *)mrb_malloc(mrb, sizeof(mrb_range_edges));
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[439] | 70 | #endif
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[270] | 71 | }
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| 72 |
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[439] | 73 | static struct RRange *
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| 74 | range_ptr_init(mrb_state *mrb, struct RRange *r, mrb_value beg, mrb_value end, mrb_bool excl)
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| 75 | {
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| 76 | r_check(mrb, beg, end);
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| 77 |
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| 78 | if (r) {
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| 79 | if (RANGE_INITIALIZED_P(r)) {
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| 80 | /* Ranges are immutable, so that they should be initialized only once. */
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| 81 | mrb_name_error(mrb, mrb_intern_lit(mrb, "initialize"), "'initialize' called twice");
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| 82 | }
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| 83 | else {
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| 84 | range_ptr_alloc_edges(mrb, r);
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| 85 | }
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| 86 | }
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| 87 | else {
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| 88 | r = (struct RRange*)mrb_obj_alloc(mrb, MRB_TT_RANGE, mrb->range_class);
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| 89 | range_ptr_alloc_edges(mrb, r);
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| 90 | }
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| 91 |
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| 92 | RANGE_BEG(r) = beg;
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| 93 | RANGE_END(r) = end;
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| 94 | RANGE_EXCL(r) = excl;
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| 95 | RANGE_INITIALIZED(r);
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| 96 |
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| 97 | return r;
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| 98 | }
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| 99 |
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| 100 | static void
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| 101 | range_ptr_replace(mrb_state *mrb, struct RRange *r, mrb_value beg, mrb_value end, mrb_bool excl)
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| 102 | {
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| 103 | range_ptr_init(mrb, r, beg, end, excl);
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| 104 | mrb_write_barrier(mrb, (struct RBasic*)r);
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| 105 | }
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| 106 |
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[270] | 107 | /*
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| 108 | * call-seq:
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| 109 | * rng.first => obj
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| 110 | * rng.begin => obj
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| 111 | *
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| 112 | * Returns the first object in <i>rng</i>.
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| 113 | */
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[439] | 114 | static mrb_value
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| 115 | range_beg(mrb_state *mrb, mrb_value range)
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[270] | 116 | {
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[439] | 117 | return mrb_range_beg(mrb, range);
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[270] | 118 | }
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| 119 |
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| 120 | /*
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| 121 | * call-seq:
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| 122 | * rng.end => obj
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| 123 | * rng.last => obj
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| 124 | *
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| 125 | * Returns the object that defines the end of <i>rng</i>.
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| 126 | *
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| 127 | * (1..10).end #=> 10
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| 128 | * (1...10).end #=> 10
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| 129 | */
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[439] | 130 | static mrb_value
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| 131 | range_end(mrb_state *mrb, mrb_value range)
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[270] | 132 | {
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[439] | 133 | return mrb_range_end(mrb, range);
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[270] | 134 | }
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| 135 |
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| 136 | /*
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| 137 | * call-seq:
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| 138 | * range.exclude_end? => true or false
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| 139 | *
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| 140 | * Returns <code>true</code> if <i>range</i> excludes its end value.
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| 141 | */
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[439] | 142 | static mrb_value
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| 143 | range_excl(mrb_state *mrb, mrb_value range)
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[270] | 144 | {
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[439] | 145 | return mrb_bool_value(mrb_range_excl_p(mrb, range));
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[270] | 146 | }
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| 147 |
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| 148 | /*
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| 149 | * call-seq:
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| 150 | * Range.new(start, end, exclusive=false) => range
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| 151 | *
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| 152 | * Constructs a range using the given <i>start</i> and <i>end</i>. If the third
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| 153 | * parameter is omitted or is <code>false</code>, the <i>range</i> will include
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| 154 | * the end object; otherwise, it will be excluded.
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| 155 | */
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[439] | 156 | static mrb_value
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| 157 | range_initialize(mrb_state *mrb, mrb_value range)
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[270] | 158 | {
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| 159 | mrb_value beg, end;
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[439] | 160 | mrb_bool exclusive = FALSE;
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[270] | 161 |
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[439] | 162 | mrb_get_args(mrb, "oo|b", &beg, &end, &exclusive);
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| 163 | range_ptr_replace(mrb, mrb_range_raw_ptr(range), beg, end, exclusive);
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[270] | 164 | return range;
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| 165 | }
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[439] | 166 |
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[270] | 167 | /*
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| 168 | * call-seq:
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| 169 | * range == obj => true or false
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| 170 | *
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| 171 | * Returns <code>true</code> only if
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| 172 | * 1) <i>obj</i> is a Range,
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| 173 | * 2) <i>obj</i> has equivalent beginning and end items (by comparing them with <code>==</code>),
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| 174 | * 3) <i>obj</i> has the same #exclude_end? setting as <i>rng</t>.
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| 175 | *
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| 176 | * (0..2) == (0..2) #=> true
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| 177 | * (0..2) == Range.new(0,2) #=> true
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| 178 | * (0..2) == (0...2) #=> false
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| 179 | */
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[439] | 180 | static mrb_value
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| 181 | range_eq(mrb_state *mrb, mrb_value range)
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[270] | 182 | {
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| 183 | struct RRange *rr;
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| 184 | struct RRange *ro;
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[439] | 185 | mrb_value obj;
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| 186 | mrb_bool v1, v2;
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[270] | 187 |
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| 188 | mrb_get_args(mrb, "o", &obj);
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| 189 |
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| 190 | if (mrb_obj_equal(mrb, range, obj)) return mrb_true_value();
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| 191 | if (!mrb_obj_is_instance_of(mrb, obj, mrb_obj_class(mrb, range))) { /* same class? */
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| 192 | return mrb_false_value();
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| 193 | }
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| 194 |
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[331] | 195 | rr = mrb_range_ptr(mrb, range);
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| 196 | ro = mrb_range_ptr(mrb, obj);
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[439] | 197 | v1 = mrb_equal(mrb, RANGE_BEG(rr), RANGE_BEG(ro));
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| 198 | v2 = mrb_equal(mrb, RANGE_END(rr), RANGE_END(ro));
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| 199 | if (!v1 || !v2 || RANGE_EXCL(rr) != RANGE_EXCL(ro)) {
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[270] | 200 | return mrb_false_value();
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| 201 | }
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| 202 | return mrb_true_value();
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| 203 | }
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| 204 |
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| 205 | /*
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| 206 | * call-seq:
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| 207 | * range === obj => true or false
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| 208 | * range.member?(val) => true or false
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| 209 | * range.include?(val) => true or false
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| 210 | */
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[439] | 211 | static mrb_value
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| 212 | range_include(mrb_state *mrb, mrb_value range)
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[270] | 213 | {
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| 214 | mrb_value val;
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[331] | 215 | struct RRange *r = mrb_range_ptr(mrb, range);
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[270] | 216 | mrb_value beg, end;
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| 217 | mrb_bool include_p;
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| 218 |
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| 219 | mrb_get_args(mrb, "o", &val);
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| 220 |
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[439] | 221 | beg = RANGE_BEG(r);
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| 222 | end = RANGE_END(r);
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| 223 | include_p = r_le(mrb, beg, val) && /* beg <= val */
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| 224 | (RANGE_EXCL(r) ? r_gt(mrb, end, val) /* end > val */
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| 225 | : r_ge(mrb, end, val)); /* end >= val */
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[270] | 226 |
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| 227 | return mrb_bool_value(include_p);
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| 228 | }
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| 229 |
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| 230 | /* 15.2.14.4.12(x) */
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| 231 | /*
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| 232 | * call-seq:
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| 233 | * rng.to_s -> string
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| 234 | *
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| 235 | * Convert this range object to a printable form.
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| 236 | */
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| 237 | static mrb_value
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| 238 | range_to_s(mrb_state *mrb, mrb_value range)
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| 239 | {
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| 240 | mrb_value str, str2;
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[331] | 241 | struct RRange *r = mrb_range_ptr(mrb, range);
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[270] | 242 |
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[439] | 243 | str = mrb_obj_as_string(mrb, RANGE_BEG(r));
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| 244 | str2 = mrb_obj_as_string(mrb, RANGE_END(r));
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[270] | 245 | str = mrb_str_dup(mrb, str);
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[439] | 246 | mrb_str_cat(mrb, str, "...", RANGE_EXCL(r) ? 3 : 2);
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[270] | 247 | mrb_str_cat_str(mrb, str, str2);
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| 248 |
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| 249 | return str;
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| 250 | }
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| 251 |
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| 252 | /* 15.2.14.4.13(x) */
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| 253 | /*
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| 254 | * call-seq:
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| 255 | * rng.inspect -> string
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| 256 | *
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| 257 | * Convert this range object to a printable form (using
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| 258 | * <code>inspect</code> to convert the start and end
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| 259 | * objects).
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| 260 | */
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| 261 | static mrb_value
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| 262 | range_inspect(mrb_state *mrb, mrb_value range)
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| 263 | {
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| 264 | mrb_value str, str2;
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[331] | 265 | struct RRange *r = mrb_range_ptr(mrb, range);
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[270] | 266 |
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[439] | 267 | str = mrb_inspect(mrb, RANGE_BEG(r));
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| 268 | str2 = mrb_inspect(mrb, RANGE_END(r));
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[270] | 269 | str = mrb_str_dup(mrb, str);
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[439] | 270 | mrb_str_cat(mrb, str, "...", RANGE_EXCL(r) ? 3 : 2);
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[270] | 271 | mrb_str_cat_str(mrb, str, str2);
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| 272 |
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| 273 | return str;
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| 274 | }
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| 275 |
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| 276 | /* 15.2.14.4.14(x) */
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| 277 | /*
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| 278 | * call-seq:
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| 279 | * rng.eql?(obj) -> true or false
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| 280 | *
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| 281 | * Returns <code>true</code> only if <i>obj</i> is a Range, has equivalent
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| 282 | * beginning and end items (by comparing them with #eql?), and has the same
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| 283 | * #exclude_end? setting as <i>rng</i>.
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| 284 | *
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| 285 | * (0..2).eql?(0..2) #=> true
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| 286 | * (0..2).eql?(Range.new(0,2)) #=> true
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| 287 | * (0..2).eql?(0...2) #=> false
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| 288 | */
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| 289 | static mrb_value
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| 290 | range_eql(mrb_state *mrb, mrb_value range)
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| 291 | {
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| 292 | mrb_value obj;
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| 293 | struct RRange *r, *o;
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| 294 |
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| 295 | mrb_get_args(mrb, "o", &obj);
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| 296 |
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| 297 | if (mrb_obj_equal(mrb, range, obj)) return mrb_true_value();
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[439] | 298 | if (!mrb_obj_is_kind_of(mrb, obj, mrb->range_class)) return mrb_false_value();
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| 299 | if (!mrb_range_p(obj)) return mrb_false_value();
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[270] | 300 |
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[331] | 301 | r = mrb_range_ptr(mrb, range);
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| 302 | o = mrb_range_ptr(mrb, obj);
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[439] | 303 | if (!mrb_eql(mrb, RANGE_BEG(r), RANGE_BEG(o)) ||
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| 304 | !mrb_eql(mrb, RANGE_END(r), RANGE_END(o)) ||
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| 305 | (RANGE_EXCL(r) != RANGE_EXCL(o))) {
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[270] | 306 | return mrb_false_value();
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| 307 | }
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| 308 | return mrb_true_value();
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| 309 | }
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| 310 |
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| 311 | /* 15.2.14.4.15(x) */
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| 312 | static mrb_value
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| 313 | range_initialize_copy(mrb_state *mrb, mrb_value copy)
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| 314 | {
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| 315 | mrb_value src;
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| 316 | struct RRange *r;
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| 317 |
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| 318 | mrb_get_args(mrb, "o", &src);
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| 319 |
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| 320 | if (mrb_obj_equal(mrb, copy, src)) return copy;
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| 321 | if (!mrb_obj_is_instance_of(mrb, src, mrb_obj_class(mrb, copy))) {
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| 322 | mrb_raise(mrb, E_TYPE_ERROR, "wrong argument class");
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| 323 | }
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| 324 |
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[331] | 325 | r = mrb_range_ptr(mrb, src);
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[439] | 326 | range_ptr_replace(mrb, mrb_range_raw_ptr(copy), RANGE_BEG(r), RANGE_END(r), RANGE_EXCL(r));
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[270] | 327 |
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| 328 | return copy;
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| 329 | }
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| 330 |
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| 331 | mrb_value
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| 332 | 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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| 333 | {
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| 334 | mrb_int i, j, beg, len;
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| 335 | mrb_value result;
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| 336 | result = mrb_ary_new(mrb);
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| 337 |
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| 338 | for (i = 0; i < argc; ++i) {
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| 339 | if (mrb_fixnum_p(argv[i])) {
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| 340 | mrb_ary_push(mrb, result, func(mrb, obj, mrb_fixnum(argv[i])));
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| 341 | }
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[439] | 342 | else if (mrb_range_beg_len(mrb, argv[i], &beg, &len, olen, FALSE) == MRB_RANGE_OK) {
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[270] | 343 | mrb_int const end = olen < beg + len ? olen : beg + len;
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| 344 | for (j = beg; j < end; ++j) {
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| 345 | mrb_ary_push(mrb, result, func(mrb, obj, j));
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| 346 | }
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| 347 |
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| 348 | for (; j < beg + len; ++j) {
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| 349 | mrb_ary_push(mrb, result, mrb_nil_value());
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| 350 | }
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| 351 | }
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| 352 | else {
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[439] | 353 | mrb_raisef(mrb, E_TYPE_ERROR, "invalid values selector: %v", argv[i]);
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[270] | 354 | }
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| 355 | }
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| 356 |
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| 357 | return result;
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| 358 | }
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| 359 |
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| 360 | void
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[439] | 361 | mrb_gc_mark_range(mrb_state *mrb, struct RRange *r)
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| 362 | {
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| 363 | if (RANGE_INITIALIZED_P(r)) {
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| 364 | mrb_gc_mark_value(mrb, RANGE_BEG(r));
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| 365 | mrb_gc_mark_value(mrb, RANGE_END(r));
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| 366 | }
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| 367 | }
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| 368 |
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| 369 | MRB_API struct RRange*
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| 370 | mrb_range_ptr(mrb_state *mrb, mrb_value range)
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| 371 | {
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| 372 | struct RRange *r = mrb_range_raw_ptr(range);
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| 373 |
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| 374 | /* check for if #initialize_copy was removed [#3320] */
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| 375 | if (!RANGE_INITIALIZED_P(r)) {
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| 376 | mrb_raise(mrb, E_ARGUMENT_ERROR, "uninitialized range");
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| 377 | }
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| 378 | return r;
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| 379 | }
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| 380 |
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| 381 | MRB_API mrb_value
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| 382 | mrb_range_new(mrb_state *mrb, mrb_value beg, mrb_value end, mrb_bool excl)
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| 383 | {
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| 384 | struct RRange *r = range_ptr_init(mrb, NULL, beg, end, excl);
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| 385 | return mrb_range_value(r);
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| 386 | }
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| 387 |
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| 388 | MRB_API enum mrb_range_beg_len
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| 389 | 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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| 390 | {
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| 391 | mrb_int beg, end;
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| 392 | struct RRange *r;
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| 393 |
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| 394 | if (!mrb_range_p(range)) return MRB_RANGE_TYPE_MISMATCH;
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| 395 | r = mrb_range_ptr(mrb, range);
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| 396 |
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| 397 | beg = mrb_int(mrb, RANGE_BEG(r));
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| 398 | end = mrb_int(mrb, RANGE_END(r));
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| 399 |
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| 400 | if (beg < 0) {
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| 401 | beg += len;
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| 402 | if (beg < 0) return MRB_RANGE_OUT;
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| 403 | }
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| 404 |
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| 405 | if (trunc) {
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| 406 | if (beg > len) return MRB_RANGE_OUT;
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| 407 | if (end > len) end = len;
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| 408 | }
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| 409 |
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| 410 | if (end < 0) end += len;
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| 411 | if (!RANGE_EXCL(r) && (!trunc || end < len)) end++; /* include end point */
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| 412 | len = end - beg;
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| 413 | if (len < 0) len = 0;
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| 414 |
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| 415 | *begp = beg;
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| 416 | *lenp = len;
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| 417 | return MRB_RANGE_OK;
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| 418 | }
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| 419 |
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| 420 | void
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[270] | 421 | mrb_init_range(mrb_state *mrb)
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| 422 | {
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| 423 | struct RClass *r;
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| 424 |
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| 425 | r = mrb_define_class(mrb, "Range", mrb->object_class); /* 15.2.14 */
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[439] | 426 | mrb->range_class = r;
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[270] | 427 | MRB_SET_INSTANCE_TT(r, MRB_TT_RANGE);
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| 428 |
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[439] | 429 | mrb_define_method(mrb, r, "begin", range_beg, MRB_ARGS_NONE()); /* 15.2.14.4.3 */
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| 430 | mrb_define_method(mrb, r, "end", range_end, MRB_ARGS_NONE()); /* 15.2.14.4.5 */
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| 431 | mrb_define_method(mrb, r, "==", range_eq, MRB_ARGS_REQ(1)); /* 15.2.14.4.1 */
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| 432 | mrb_define_method(mrb, r, "===", range_include, MRB_ARGS_REQ(1)); /* 15.2.14.4.2 */
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| 433 | mrb_define_method(mrb, r, "exclude_end?", range_excl, MRB_ARGS_NONE()); /* 15.2.14.4.6 */
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| 434 | mrb_define_method(mrb, r, "first", range_beg, MRB_ARGS_NONE()); /* 15.2.14.4.7 */
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| 435 | mrb_define_method(mrb, r, "include?", range_include, MRB_ARGS_REQ(1)); /* 15.2.14.4.8 */
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| 436 | mrb_define_method(mrb, r, "initialize", range_initialize, MRB_ARGS_ANY()); /* 15.2.14.4.9 */
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| 437 | mrb_define_method(mrb, r, "last", range_end, MRB_ARGS_NONE()); /* 15.2.14.4.10 */
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| 438 | mrb_define_method(mrb, r, "member?", range_include, MRB_ARGS_REQ(1)); /* 15.2.14.4.11 */
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[270] | 439 | mrb_define_method(mrb, r, "to_s", range_to_s, MRB_ARGS_NONE()); /* 15.2.14.4.12(x) */
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| 440 | mrb_define_method(mrb, r, "inspect", range_inspect, MRB_ARGS_NONE()); /* 15.2.14.4.13(x) */
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| 441 | mrb_define_method(mrb, r, "eql?", range_eql, MRB_ARGS_REQ(1)); /* 15.2.14.4.14(x) */
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| 442 | mrb_define_method(mrb, r, "initialize_copy", range_initialize_copy, MRB_ARGS_REQ(1)); /* 15.2.14.4.15(x) */
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| 443 | }
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