2 ** range.c - Range class
4 ** See Copyright Notice in mruby.h
8 #include <mruby/class.h>
9 #include <mruby/range.h>
10 #include <mruby/string.h>
11 #include <mruby/array.h>
13 #define RANGE_INITIALIZED_MASK 1
14 #define RANGE_INITIALIZED(p) ((p)->flags |= RANGE_INITIALIZED_MASK)
15 #define RANGE_INITIALIZED_P(p) ((p)->flags & RANGE_INITIALIZED_MASK)
18 r_check(mrb_state *mrb, mrb_value a, mrb_value b)
26 #ifdef MRB_WITHOUT_FLOAT
27 if (ta == MRB_TT_FIXNUM && tb == MRB_TT_FIXNUM ) {
29 if ((ta == MRB_TT_FIXNUM || ta == MRB_TT_FLOAT) &&
30 (tb == MRB_TT_FIXNUM || tb == MRB_TT_FLOAT)) {
35 n = mrb_cmp(mrb, a, b);
36 if (n == -2) { /* can not be compared */
37 mrb_raise(mrb, E_ARGUMENT_ERROR, "bad value for range");
42 r_le(mrb_state *mrb, mrb_value a, mrb_value b)
44 mrb_int n = mrb_cmp(mrb, a, b);
46 if (n == 0 || n == -1) return TRUE;
51 r_gt(mrb_state *mrb, mrb_value a, mrb_value b)
53 return mrb_cmp(mrb, a, b) == 1;
57 r_ge(mrb_state *mrb, mrb_value a, mrb_value b)
59 mrb_int n = mrb_cmp(mrb, a, b);
61 if (n == 0 || n == 1) return TRUE;
66 range_ptr_alloc_edges(mrb_state *mrb, struct RRange *r)
68 #ifndef MRB_RANGE_EMBED
69 r->edges = (mrb_range_edges *)mrb_malloc(mrb, sizeof(mrb_range_edges));
73 static struct RRange *
74 range_ptr_init(mrb_state *mrb, struct RRange *r, mrb_value beg, mrb_value end, mrb_bool excl)
76 r_check(mrb, beg, end);
79 if (RANGE_INITIALIZED_P(r)) {
80 /* Ranges are immutable, so that they should be initialized only once. */
81 mrb_name_error(mrb, mrb_intern_lit(mrb, "initialize"), "'initialize' called twice");
84 range_ptr_alloc_edges(mrb, r);
88 r = (struct RRange*)mrb_obj_alloc(mrb, MRB_TT_RANGE, mrb->range_class);
89 range_ptr_alloc_edges(mrb, r);
101 range_ptr_replace(mrb_state *mrb, struct RRange *r, mrb_value beg, mrb_value end, mrb_bool excl)
103 range_ptr_init(mrb, r, beg, end, excl);
104 mrb_write_barrier(mrb, (struct RBasic*)r);
112 * Returns the first object in <i>rng</i>.
115 range_beg(mrb_state *mrb, mrb_value range)
117 return mrb_range_beg(mrb, range);
125 * Returns the object that defines the end of <i>rng</i>.
128 * (1...10).end #=> 10
131 range_end(mrb_state *mrb, mrb_value range)
133 return mrb_range_end(mrb, range);
138 * range.exclude_end? => true or false
140 * Returns <code>true</code> if <i>range</i> excludes its end value.
143 range_excl(mrb_state *mrb, mrb_value range)
145 return mrb_bool_value(mrb_range_excl_p(mrb, range));
150 * Range.new(start, end, exclusive=false) => range
152 * Constructs a range using the given <i>start</i> and <i>end</i>. If the third
153 * parameter is omitted or is <code>false</code>, the <i>range</i> will include
154 * the end object; otherwise, it will be excluded.
157 range_initialize(mrb_state *mrb, mrb_value range)
160 mrb_bool exclusive = FALSE;
162 mrb_get_args(mrb, "oo|b", &beg, &end, &exclusive);
163 range_ptr_replace(mrb, mrb_range_raw_ptr(range), beg, end, exclusive);
169 * range == obj => true or false
171 * Returns <code>true</code> only if
172 * 1) <i>obj</i> is a Range,
173 * 2) <i>obj</i> has equivalent beginning and end items (by comparing them with <code>==</code>),
174 * 3) <i>obj</i> has the same #exclude_end? setting as <i>rng</t>.
176 * (0..2) == (0..2) #=> true
177 * (0..2) == Range.new(0,2) #=> true
178 * (0..2) == (0...2) #=> false
181 range_eq(mrb_state *mrb, mrb_value range)
185 mrb_value obj = mrb_get_arg1(mrb);
188 if (mrb_obj_equal(mrb, range, obj)) return mrb_true_value();
189 if (!mrb_obj_is_instance_of(mrb, obj, mrb_obj_class(mrb, range))) { /* same class? */
190 return mrb_false_value();
193 rr = mrb_range_ptr(mrb, range);
194 ro = mrb_range_ptr(mrb, obj);
195 v1 = mrb_equal(mrb, RANGE_BEG(rr), RANGE_BEG(ro));
196 v2 = mrb_equal(mrb, RANGE_END(rr), RANGE_END(ro));
197 if (!v1 || !v2 || RANGE_EXCL(rr) != RANGE_EXCL(ro)) {
198 return mrb_false_value();
200 return mrb_true_value();
205 * range === obj => true or false
206 * range.member?(val) => true or false
207 * range.include?(val) => true or false
210 range_include(mrb_state *mrb, mrb_value range)
212 mrb_value val = mrb_get_arg1(mrb);
213 struct RRange *r = mrb_range_ptr(mrb, range);
219 include_p = r_le(mrb, beg, val) && /* beg <= val */
220 (RANGE_EXCL(r) ? r_gt(mrb, end, val) /* end > val */
221 : r_ge(mrb, end, val)); /* end >= val */
223 return mrb_bool_value(include_p);
226 /* 15.2.14.4.12(x) */
231 * Convert this range object to a printable form.
234 range_to_s(mrb_state *mrb, mrb_value range)
237 struct RRange *r = mrb_range_ptr(mrb, range);
239 str = mrb_obj_as_string(mrb, RANGE_BEG(r));
240 str2 = mrb_obj_as_string(mrb, RANGE_END(r));
241 str = mrb_str_dup(mrb, str);
242 mrb_str_cat(mrb, str, "...", RANGE_EXCL(r) ? 3 : 2);
243 mrb_str_cat_str(mrb, str, str2);
248 /* 15.2.14.4.13(x) */
251 * rng.inspect -> string
253 * Convert this range object to a printable form (using
254 * <code>inspect</code> to convert the start and end
258 range_inspect(mrb_state *mrb, mrb_value range)
261 struct RRange *r = mrb_range_ptr(mrb, range);
263 str = mrb_inspect(mrb, RANGE_BEG(r));
264 str2 = mrb_inspect(mrb, RANGE_END(r));
265 str = mrb_str_dup(mrb, str);
266 mrb_str_cat(mrb, str, "...", RANGE_EXCL(r) ? 3 : 2);
267 mrb_str_cat_str(mrb, str, str2);
272 /* 15.2.14.4.14(x) */
275 * rng.eql?(obj) -> true or false
277 * Returns <code>true</code> only if <i>obj</i> is a Range, has equivalent
278 * beginning and end items (by comparing them with #eql?), and has the same
279 * #exclude_end? setting as <i>rng</i>.
281 * (0..2).eql?(0..2) #=> true
282 * (0..2).eql?(Range.new(0,2)) #=> true
283 * (0..2).eql?(0...2) #=> false
286 range_eql(mrb_state *mrb, mrb_value range)
288 mrb_value obj = mrb_get_arg1(mrb);
289 struct RRange *r, *o;
291 if (mrb_obj_equal(mrb, range, obj)) return mrb_true_value();
292 if (!mrb_obj_is_kind_of(mrb, obj, mrb->range_class)) return mrb_false_value();
293 if (!mrb_range_p(obj)) return mrb_false_value();
295 r = mrb_range_ptr(mrb, range);
296 o = mrb_range_ptr(mrb, obj);
297 if (!mrb_eql(mrb, RANGE_BEG(r), RANGE_BEG(o)) ||
298 !mrb_eql(mrb, RANGE_END(r), RANGE_END(o)) ||
299 (RANGE_EXCL(r) != RANGE_EXCL(o))) {
300 return mrb_false_value();
302 return mrb_true_value();
305 /* 15.2.14.4.15(x) */
307 range_initialize_copy(mrb_state *mrb, mrb_value copy)
309 mrb_value src = mrb_get_arg1(mrb);
312 if (mrb_obj_equal(mrb, copy, src)) return copy;
313 if (!mrb_obj_is_instance_of(mrb, src, mrb_obj_class(mrb, copy))) {
314 mrb_raise(mrb, E_TYPE_ERROR, "wrong argument class");
317 r = mrb_range_ptr(mrb, src);
318 range_ptr_replace(mrb, mrb_range_raw_ptr(copy), RANGE_BEG(r), RANGE_END(r), RANGE_EXCL(r));
324 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))
326 mrb_int i, j, beg, len;
328 result = mrb_ary_new(mrb);
330 for (i = 0; i < argc; ++i) {
331 if (mrb_fixnum_p(argv[i])) {
332 mrb_ary_push(mrb, result, func(mrb, obj, mrb_fixnum(argv[i])));
334 else if (mrb_range_beg_len(mrb, argv[i], &beg, &len, olen, FALSE) == MRB_RANGE_OK) {
335 mrb_int const end = olen < beg + len ? olen : beg + len;
336 for (j = beg; j < end; ++j) {
337 mrb_ary_push(mrb, result, func(mrb, obj, j));
340 for (; j < beg + len; ++j) {
341 mrb_ary_push(mrb, result, mrb_nil_value());
345 mrb_raisef(mrb, E_TYPE_ERROR, "invalid values selector: %v", argv[i]);
353 mrb_gc_mark_range(mrb_state *mrb, struct RRange *r)
355 if (RANGE_INITIALIZED_P(r)) {
356 mrb_gc_mark_value(mrb, RANGE_BEG(r));
357 mrb_gc_mark_value(mrb, RANGE_END(r));
361 MRB_API struct RRange*
362 mrb_range_ptr(mrb_state *mrb, mrb_value range)
364 struct RRange *r = mrb_range_raw_ptr(range);
366 /* check for if #initialize_copy was removed [#3320] */
367 if (!RANGE_INITIALIZED_P(r)) {
368 mrb_raise(mrb, E_ARGUMENT_ERROR, "uninitialized range");
374 mrb_range_new(mrb_state *mrb, mrb_value beg, mrb_value end, mrb_bool excl)
376 struct RRange *r = range_ptr_init(mrb, NULL, beg, end, excl);
377 return mrb_range_value(r);
380 MRB_API enum mrb_range_beg_len
381 mrb_range_beg_len(mrb_state *mrb, mrb_value range, mrb_int *begp, mrb_int *lenp, mrb_int len, mrb_bool trunc)
386 if (!mrb_range_p(range)) return MRB_RANGE_TYPE_MISMATCH;
387 r = mrb_range_ptr(mrb, range);
389 beg = mrb_int(mrb, RANGE_BEG(r));
390 end = mrb_int(mrb, RANGE_END(r));
394 if (beg < 0) return MRB_RANGE_OUT;
398 if (beg > len) return MRB_RANGE_OUT;
399 if (end > len) end = len;
402 if (end < 0) end += len;
403 if (!RANGE_EXCL(r) && (!trunc || end < len)) end++; /* include end point */
405 if (len < 0) len = 0;
413 mrb_init_range(mrb_state *mrb)
417 r = mrb_define_class(mrb, "Range", mrb->object_class); /* 15.2.14 */
418 mrb->range_class = r;
419 MRB_SET_INSTANCE_TT(r, MRB_TT_RANGE);
421 mrb_define_method(mrb, r, "begin", range_beg, MRB_ARGS_NONE()); /* 15.2.14.4.3 */
422 mrb_define_method(mrb, r, "end", range_end, MRB_ARGS_NONE()); /* 15.2.14.4.5 */
423 mrb_define_method(mrb, r, "==", range_eq, MRB_ARGS_REQ(1)); /* 15.2.14.4.1 */
424 mrb_define_method(mrb, r, "===", range_include, MRB_ARGS_REQ(1)); /* 15.2.14.4.2 */
425 mrb_define_method(mrb, r, "exclude_end?", range_excl, MRB_ARGS_NONE()); /* 15.2.14.4.6 */
426 mrb_define_method(mrb, r, "first", range_beg, MRB_ARGS_NONE()); /* 15.2.14.4.7 */
427 mrb_define_method(mrb, r, "include?", range_include, MRB_ARGS_REQ(1)); /* 15.2.14.4.8 */
428 mrb_define_method(mrb, r, "initialize", range_initialize, MRB_ARGS_ANY()); /* 15.2.14.4.9 */
429 mrb_define_method(mrb, r, "last", range_end, MRB_ARGS_NONE()); /* 15.2.14.4.10 */
430 mrb_define_method(mrb, r, "member?", range_include, MRB_ARGS_REQ(1)); /* 15.2.14.4.11 */
431 mrb_define_method(mrb, r, "to_s", range_to_s, MRB_ARGS_NONE()); /* 15.2.14.4.12(x) */
432 mrb_define_method(mrb, r, "inspect", range_inspect, MRB_ARGS_NONE()); /* 15.2.14.4.13(x) */
433 mrb_define_method(mrb, r, "eql?", range_eql, MRB_ARGS_REQ(1)); /* 15.2.14.4.14(x) */
434 mrb_define_method(mrb, r, "initialize_copy", range_initialize_copy, MRB_ARGS_REQ(1)); /* 15.2.14.4.15(x) */