/* ** array.c - Array class ** ** See Copyright Notice in mruby.h */ #include #include #include #include #include #include "value_array.h" #define ARY_DEFAULT_LEN 4 #define ARY_SHRINK_RATIO 5 /* must be larger than 2 */ #define ARY_C_MAX_SIZE (SIZE_MAX / sizeof(mrb_value)) #define ARY_MAX_SIZE ((mrb_int)((ARY_C_MAX_SIZE < (size_t)MRB_INT_MAX) ? ARY_C_MAX_SIZE : MRB_INT_MAX-1)) static struct RArray* ary_new_capa(mrb_state *mrb, mrb_int capa) { struct RArray *a; size_t blen; if (capa > ARY_MAX_SIZE) { mrb_raise(mrb, E_ARGUMENT_ERROR, "array size too big"); } blen = capa * sizeof(mrb_value); a = (struct RArray*)mrb_obj_alloc(mrb, MRB_TT_ARRAY, mrb->array_class); if (capa <= MRB_ARY_EMBED_LEN_MAX) { ARY_SET_EMBED_LEN(a, 0); } else { a->as.heap.ptr = (mrb_value *)mrb_malloc(mrb, blen); a->as.heap.aux.capa = capa; a->as.heap.len = 0; } return a; } MRB_API mrb_value mrb_ary_new_capa(mrb_state *mrb, mrb_int capa) { struct RArray *a = ary_new_capa(mrb, capa); return mrb_obj_value(a); } MRB_API mrb_value mrb_ary_new(mrb_state *mrb) { return mrb_ary_new_capa(mrb, 0); } /* * to copy array, use this instead of memcpy because of portability * * gcc on ARM may fail optimization of memcpy * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/ka3934.html * * gcc on MIPS also fail * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39755 * * memcpy doesn't exist on freestanding environment * * If you optimize for binary size, use memcpy instead of this at your own risk * of above portability issue. * * see also http://togetter.com/li/462898 * */ static inline void array_copy(mrb_value *dst, const mrb_value *src, mrb_int size) { mrb_int i; for (i = 0; i < size; i++) { dst[i] = src[i]; } } MRB_API mrb_value mrb_ary_new_from_values(mrb_state *mrb, mrb_int size, const mrb_value *vals) { struct RArray *a = ary_new_capa(mrb, size); array_copy(ARY_PTR(a), vals, size); ARY_SET_LEN(a, size); return mrb_obj_value(a); } MRB_API mrb_value mrb_assoc_new(mrb_state *mrb, mrb_value car, mrb_value cdr) { struct RArray *a; a = ary_new_capa(mrb, 2); ARY_PTR(a)[0] = car; ARY_PTR(a)[1] = cdr; ARY_SET_LEN(a, 2); return mrb_obj_value(a); } static void ary_fill_with_nil(mrb_value *ptr, mrb_int size) { mrb_value nil = mrb_nil_value(); while (size--) { *ptr++ = nil; } } static void ary_modify_check(mrb_state *mrb, struct RArray *a) { if (MRB_FROZEN_P(a)) { mrb_raise(mrb, E_FROZEN_ERROR, "can't modify frozen array"); } } static void ary_modify(mrb_state *mrb, struct RArray *a) { ary_modify_check(mrb, a); if (ARY_SHARED_P(a)) { mrb_shared_array *shared = a->as.heap.aux.shared; if (shared->refcnt == 1 && a->as.heap.ptr == shared->ptr) { a->as.heap.ptr = shared->ptr; a->as.heap.aux.capa = a->as.heap.len; mrb_free(mrb, shared); } else { mrb_value *ptr, *p; mrb_int len; p = a->as.heap.ptr; len = a->as.heap.len * sizeof(mrb_value); ptr = (mrb_value *)mrb_malloc(mrb, len); if (p) { array_copy(ptr, p, a->as.heap.len); } a->as.heap.ptr = ptr; a->as.heap.aux.capa = a->as.heap.len; mrb_ary_decref(mrb, shared); } ARY_UNSET_SHARED_FLAG(a); } } MRB_API void mrb_ary_modify(mrb_state *mrb, struct RArray* a) { mrb_write_barrier(mrb, (struct RBasic*)a); ary_modify(mrb, a); } static void ary_make_shared(mrb_state *mrb, struct RArray *a) { if (!ARY_SHARED_P(a) && !ARY_EMBED_P(a)) { mrb_shared_array *shared = (mrb_shared_array *)mrb_malloc(mrb, sizeof(mrb_shared_array)); mrb_value *ptr = a->as.heap.ptr; mrb_int len = a->as.heap.len; shared->refcnt = 1; if (a->as.heap.aux.capa > len) { a->as.heap.ptr = shared->ptr = (mrb_value *)mrb_realloc(mrb, ptr, sizeof(mrb_value)*len+1); } else { shared->ptr = ptr; } shared->len = len; a->as.heap.aux.shared = shared; ARY_SET_SHARED_FLAG(a); } } static void ary_expand_capa(mrb_state *mrb, struct RArray *a, mrb_int len) { mrb_int capa = ARY_CAPA(a); if (len > ARY_MAX_SIZE || len < 0) { size_error: mrb_raise(mrb, E_ARGUMENT_ERROR, "array size too big"); } if (capa < ARY_DEFAULT_LEN) { capa = ARY_DEFAULT_LEN; } while (capa < len) { if (capa <= ARY_MAX_SIZE / 2) { capa *= 2; } else { capa = len; } } if (capa < len || capa > ARY_MAX_SIZE) { goto size_error; } if (ARY_EMBED_P(a)) { mrb_value *ptr = ARY_EMBED_PTR(a); mrb_int len = ARY_EMBED_LEN(a); mrb_value *expanded_ptr = (mrb_value *)mrb_malloc(mrb, sizeof(mrb_value)*capa); ARY_UNSET_EMBED_FLAG(a); array_copy(expanded_ptr, ptr, len); a->as.heap.len = len; a->as.heap.aux.capa = capa; a->as.heap.ptr = expanded_ptr; } else if (capa > a->as.heap.aux.capa) { mrb_value *expanded_ptr = (mrb_value *)mrb_realloc(mrb, a->as.heap.ptr, sizeof(mrb_value)*capa); a->as.heap.aux.capa = capa; a->as.heap.ptr = expanded_ptr; } } static void ary_shrink_capa(mrb_state *mrb, struct RArray *a) { mrb_int capa; if (ARY_EMBED_P(a)) return; capa = a->as.heap.aux.capa; if (capa < ARY_DEFAULT_LEN * 2) return; if (capa <= a->as.heap.len * ARY_SHRINK_RATIO) return; do { capa /= 2; if (capa < ARY_DEFAULT_LEN) { capa = ARY_DEFAULT_LEN; break; } } while (capa > a->as.heap.len * ARY_SHRINK_RATIO); if (capa > a->as.heap.len && capa < a->as.heap.aux.capa) { a->as.heap.aux.capa = capa; a->as.heap.ptr = (mrb_value *)mrb_realloc(mrb, a->as.heap.ptr, sizeof(mrb_value)*capa); } } MRB_API mrb_value mrb_ary_resize(mrb_state *mrb, mrb_value ary, mrb_int new_len) { mrb_int old_len; struct RArray *a = mrb_ary_ptr(ary); ary_modify(mrb, a); old_len = RARRAY_LEN(ary); if (old_len != new_len) { ARY_SET_LEN(a, new_len); if (new_len < old_len) { ary_shrink_capa(mrb, a); } else { ary_expand_capa(mrb, a, new_len); ary_fill_with_nil(ARY_PTR(a) + old_len, new_len - old_len); } } return ary; } static mrb_value mrb_ary_s_create(mrb_state *mrb, mrb_value klass) { mrb_value ary; mrb_value *vals; mrb_int len; struct RArray *a; mrb_get_args(mrb, "*!", &vals, &len); ary = mrb_ary_new_from_values(mrb, len, vals); a = mrb_ary_ptr(ary); a->c = mrb_class_ptr(klass); return ary; } static void ary_concat(mrb_state *mrb, struct RArray *a, struct RArray *a2) { mrb_int len; if (ARY_LEN(a2) > ARY_MAX_SIZE - ARY_LEN(a)) { mrb_raise(mrb, E_ARGUMENT_ERROR, "array size too big"); } len = ARY_LEN(a) + ARY_LEN(a2); ary_modify(mrb, a); if (ARY_CAPA(a) < len) { ary_expand_capa(mrb, a, len); } array_copy(ARY_PTR(a)+ARY_LEN(a), ARY_PTR(a2), ARY_LEN(a2)); mrb_write_barrier(mrb, (struct RBasic*)a); ARY_SET_LEN(a, len); } MRB_API void mrb_ary_concat(mrb_state *mrb, mrb_value self, mrb_value other) { struct RArray *a2 = mrb_ary_ptr(other); ary_concat(mrb, mrb_ary_ptr(self), a2); } static mrb_value mrb_ary_concat_m(mrb_state *mrb, mrb_value self) { mrb_value ary; mrb_get_args(mrb, "A", &ary); mrb_ary_concat(mrb, self, ary); return self; } static mrb_value mrb_ary_plus(mrb_state *mrb, mrb_value self) { struct RArray *a1 = mrb_ary_ptr(self); struct RArray *a2; mrb_value *ptr; mrb_int blen, len1; mrb_get_args(mrb, "a", &ptr, &blen); if (ARY_MAX_SIZE - blen < ARY_LEN(a1)) { mrb_raise(mrb, E_ARGUMENT_ERROR, "array size too big"); } len1 = ARY_LEN(a1); a2 = ary_new_capa(mrb, len1 + blen); array_copy(ARY_PTR(a2), ARY_PTR(a1), len1); array_copy(ARY_PTR(a2) + len1, ptr, blen); ARY_SET_LEN(a2, len1+blen); return mrb_obj_value(a2); } static void ary_replace(mrb_state *mrb, struct RArray *a, mrb_value *argv, mrb_int len) { ary_modify(mrb, a); if (ARY_CAPA(a) < len) ary_expand_capa(mrb, a, len); array_copy(ARY_PTR(a), argv, len); mrb_write_barrier(mrb, (struct RBasic*)a); ARY_SET_LEN(a, len); } MRB_API void mrb_ary_replace(mrb_state *mrb, mrb_value self, mrb_value other) { struct RArray *a1 = mrb_ary_ptr(self); struct RArray *a2 = mrb_ary_ptr(other); if (a1 != a2) { ary_replace(mrb, a1, ARY_PTR(a2), ARY_LEN(a2)); } } static mrb_value mrb_ary_replace_m(mrb_state *mrb, mrb_value self) { mrb_value other; mrb_get_args(mrb, "A", &other); mrb_ary_replace(mrb, self, other); return self; } static mrb_value mrb_ary_times(mrb_state *mrb, mrb_value self) { struct RArray *a1 = mrb_ary_ptr(self); struct RArray *a2; mrb_value *ptr; mrb_int times, len1; mrb_get_args(mrb, "i", ×); if (times < 0) { mrb_raise(mrb, E_ARGUMENT_ERROR, "negative argument"); } if (times == 0) return mrb_ary_new(mrb); if (ARY_MAX_SIZE / times < ARY_LEN(a1)) { mrb_raise(mrb, E_ARGUMENT_ERROR, "array size too big"); } len1 = ARY_LEN(a1); a2 = ary_new_capa(mrb, len1 * times); ARY_SET_LEN(a2, len1 * times); ptr = ARY_PTR(a2); while (times--) { array_copy(ptr, ARY_PTR(a1), len1); ptr += len1; } return mrb_obj_value(a2); } static mrb_value mrb_ary_reverse_bang(mrb_state *mrb, mrb_value self) { struct RArray *a = mrb_ary_ptr(self); mrb_int len = ARY_LEN(a); if (len > 1) { mrb_value *p1, *p2; ary_modify(mrb, a); p1 = ARY_PTR(a); p2 = p1 + len - 1; while (p1 < p2) { mrb_value tmp = *p1; *p1++ = *p2; *p2-- = tmp; } } return self; } static mrb_value mrb_ary_reverse(mrb_state *mrb, mrb_value self) { struct RArray *a = mrb_ary_ptr(self), *b = ary_new_capa(mrb, ARY_LEN(a)); mrb_int len = ARY_LEN(a); if (len > 0) { mrb_value *p1, *p2, *e; p1 = ARY_PTR(a); e = p1 + len; p2 = ARY_PTR(b) + len - 1; while (p1 < e) { *p2-- = *p1++; } ARY_SET_LEN(b, len); } return mrb_obj_value(b); } MRB_API void mrb_ary_push(mrb_state *mrb, mrb_value ary, mrb_value elem) { struct RArray *a = mrb_ary_ptr(ary); mrb_int len = ARY_LEN(a); ary_modify(mrb, a); if (len == ARY_CAPA(a)) ary_expand_capa(mrb, a, len + 1); ARY_PTR(a)[len] = elem; ARY_SET_LEN(a, len+1); mrb_field_write_barrier_value(mrb, (struct RBasic*)a, elem); } static mrb_value mrb_ary_push_m(mrb_state *mrb, mrb_value self) { mrb_value *argv; mrb_int len, len2, alen; struct RArray *a; mrb_get_args(mrb, "*!", &argv, &alen); a = mrb_ary_ptr(self); ary_modify(mrb, a); len = ARY_LEN(a); len2 = len + alen; if (ARY_CAPA(a) < len2) { ary_expand_capa(mrb, a, len2); } array_copy(ARY_PTR(a)+len, argv, alen); ARY_SET_LEN(a, len2); mrb_write_barrier(mrb, (struct RBasic*)a); return self; } MRB_API mrb_value mrb_ary_pop(mrb_state *mrb, mrb_value ary) { struct RArray *a = mrb_ary_ptr(ary); mrb_int len = ARY_LEN(a); ary_modify_check(mrb, a); if (len == 0) return mrb_nil_value(); ARY_SET_LEN(a, len-1); return ARY_PTR(a)[len-1]; } #define ARY_SHIFT_SHARED_MIN 10 MRB_API mrb_value mrb_ary_shift(mrb_state *mrb, mrb_value self) { struct RArray *a = mrb_ary_ptr(self); mrb_int len = ARY_LEN(a); mrb_value val; ary_modify_check(mrb, a); if (len == 0) return mrb_nil_value(); if (ARY_SHARED_P(a)) { L_SHIFT: val = a->as.heap.ptr[0]; a->as.heap.ptr++; a->as.heap.len--; return val; } if (len > ARY_SHIFT_SHARED_MIN) { ary_make_shared(mrb, a); goto L_SHIFT; } else { mrb_value *ptr = ARY_PTR(a); mrb_int size = len; val = *ptr; while (--size) { *ptr = *(ptr+1); ++ptr; } ARY_SET_LEN(a, len-1); } return val; } /* self = [1,2,3] item = 0 self.unshift item p self #=> [0, 1, 2, 3] */ MRB_API mrb_value mrb_ary_unshift(mrb_state *mrb, mrb_value self, mrb_value item) { struct RArray *a = mrb_ary_ptr(self); mrb_int len = ARY_LEN(a); if (ARY_SHARED_P(a) && a->as.heap.aux.shared->refcnt == 1 /* shared only referenced from this array */ && a->as.heap.ptr - a->as.heap.aux.shared->ptr >= 1) /* there's room for unshifted item */ { a->as.heap.ptr--; a->as.heap.ptr[0] = item; } else { mrb_value *ptr; ary_modify(mrb, a); if (ARY_CAPA(a) < len + 1) ary_expand_capa(mrb, a, len + 1); ptr = ARY_PTR(a); value_move(ptr + 1, ptr, len); ptr[0] = item; } ARY_SET_LEN(a, len+1); mrb_field_write_barrier_value(mrb, (struct RBasic*)a, item); return self; } static mrb_value mrb_ary_unshift_m(mrb_state *mrb, mrb_value self) { struct RArray *a = mrb_ary_ptr(self); mrb_value *vals, *ptr; mrb_int alen, len; mrb_get_args(mrb, "*!", &vals, &alen); if (alen == 0) { ary_modify_check(mrb, a); return self; } len = ARY_LEN(a); if (alen > ARY_MAX_SIZE - len) { mrb_raise(mrb, E_ARGUMENT_ERROR, "array size too big"); } if (ARY_SHARED_P(a) && a->as.heap.aux.shared->refcnt == 1 /* shared only referenced from this array */ && a->as.heap.ptr - a->as.heap.aux.shared->ptr >= alen) /* there's room for unshifted item */ { ary_modify_check(mrb, a); a->as.heap.ptr -= alen; ptr = a->as.heap.ptr; } else { ary_modify(mrb, a); if (ARY_CAPA(a) < len + alen) ary_expand_capa(mrb, a, len + alen); ptr = ARY_PTR(a); value_move(ptr + alen, ptr, len); } array_copy(ptr, vals, alen); ARY_SET_LEN(a, len+alen); while (alen--) { mrb_field_write_barrier_value(mrb, (struct RBasic*)a, vals[alen]); } return self; } MRB_API mrb_value mrb_ary_ref(mrb_state *mrb, mrb_value ary, mrb_int n) { struct RArray *a = mrb_ary_ptr(ary); mrb_int len = ARY_LEN(a); /* range check */ if (n < 0) n += len; if (n < 0 || len <= n) return mrb_nil_value(); return ARY_PTR(a)[n]; } MRB_API void mrb_ary_set(mrb_state *mrb, mrb_value ary, mrb_int n, mrb_value val) { struct RArray *a = mrb_ary_ptr(ary); mrb_int len = ARY_LEN(a); ary_modify(mrb, a); /* range check */ if (n < 0) { n += len; if (n < 0) { mrb_raisef(mrb, E_INDEX_ERROR, "index %S out of array", mrb_fixnum_value(n - len)); } } if (len <= n) { if (ARY_CAPA(a) <= n) ary_expand_capa(mrb, a, n + 1); ary_fill_with_nil(ARY_PTR(a) + len, n + 1 - len); ARY_SET_LEN(a, n+1); } ARY_PTR(a)[n] = val; mrb_field_write_barrier_value(mrb, (struct RBasic*)a, val); } static struct RArray* ary_dup(mrb_state *mrb, struct RArray *a) { mrb_int len = ARY_LEN(a); struct RArray *d = ary_new_capa(mrb, len); ary_replace(mrb, d, ARY_PTR(a), len); return d; } MRB_API mrb_value mrb_ary_splice(mrb_state *mrb, mrb_value ary, mrb_int head, mrb_int len, mrb_value rpl) { struct RArray *a = mrb_ary_ptr(ary); mrb_int alen = ARY_LEN(a); const mrb_value *argv; mrb_int argc; mrb_int tail; ary_modify(mrb, a); /* len check */ if (len < 0) mrb_raisef(mrb, E_INDEX_ERROR, "negative length (%S)", mrb_fixnum_value(len)); /* range check */ if (head < 0) { head += alen; if (head < 0) { mrb_raise(mrb, E_INDEX_ERROR, "index is out of array"); } } tail = head + len; if (alen < len || alen < tail) { len = alen - head; } /* size check */ if (mrb_array_p(rpl)) { argc = RARRAY_LEN(rpl); argv = RARRAY_PTR(rpl); if (argv == ARY_PTR(a)) { struct RArray *r; if (argc > 32767) { mrb_raise(mrb, E_ARGUMENT_ERROR, "too big recursive splice"); } r = ary_dup(mrb, a); argv = ARY_PTR(r); } } else { argc = 1; argv = &rpl; } if (head >= alen) { if (head > ARY_MAX_SIZE - argc) { mrb_raisef(mrb, E_INDEX_ERROR, "index %S too big", mrb_fixnum_value(head)); } len = head + argc; if (len > ARY_CAPA(a)) { ary_expand_capa(mrb, a, head + argc); } ary_fill_with_nil(ARY_PTR(a) + alen, head - alen); if (argc > 0) { array_copy(ARY_PTR(a) + head, argv, argc); } ARY_SET_LEN(a, len); } else { mrb_int newlen; if (alen - len > ARY_MAX_SIZE - argc) { mrb_raisef(mrb, E_INDEX_ERROR, "index %S too big", mrb_fixnum_value(alen + argc - len)); } newlen = alen + argc - len; if (newlen > ARY_CAPA(a)) { ary_expand_capa(mrb, a, newlen); } if (len != argc) { mrb_value *ptr = ARY_PTR(a); tail = head + len; value_move(ptr + head + argc, ptr + tail, alen - tail); ARY_SET_LEN(a, newlen); } if (argc > 0) { value_move(ARY_PTR(a) + head, argv, argc); } } mrb_write_barrier(mrb, (struct RBasic*)a); return ary; } void mrb_ary_decref(mrb_state *mrb, mrb_shared_array *shared) { shared->refcnt--; if (shared->refcnt == 0) { mrb_free(mrb, shared->ptr); mrb_free(mrb, shared); } } static mrb_value ary_subseq(mrb_state *mrb, struct RArray *a, mrb_int beg, mrb_int len) { struct RArray *b; if (!ARY_SHARED_P(a) && len <= ARY_SHIFT_SHARED_MIN) { return mrb_ary_new_from_values(mrb, len, ARY_PTR(a)+beg); } ary_make_shared(mrb, a); b = (struct RArray*)mrb_obj_alloc(mrb, MRB_TT_ARRAY, mrb->array_class); b->as.heap.ptr = a->as.heap.ptr + beg; b->as.heap.len = len; b->as.heap.aux.shared = a->as.heap.aux.shared; b->as.heap.aux.shared->refcnt++; ARY_SET_SHARED_FLAG(b); return mrb_obj_value(b); } static mrb_int aget_index(mrb_state *mrb, mrb_value index) { if (mrb_fixnum_p(index)) { return mrb_fixnum(index); } #ifndef MRB_WITHOUT_FLOAT else if (mrb_float_p(index)) { return (mrb_int)mrb_float(index); } #endif else { mrb_int i, argc; mrb_value *argv; mrb_get_args(mrb, "i*!", &i, &argv, &argc); return i; } } /* * call-seq: * ary[index] -> obj or nil * ary[start, length] -> new_ary or nil * ary[range] -> new_ary or nil * ary.slice(index) -> obj or nil * ary.slice(start, length) -> new_ary or nil * ary.slice(range) -> new_ary or nil * * Element Reference --- Returns the element at +index+, or returns a * subarray starting at the +start+ index and continuing for +length+ * elements, or returns a subarray specified by +range+ of indices. * * Negative indices count backward from the end of the array (-1 is the last * element). For +start+ and +range+ cases the starting index is just before * an element. Additionally, an empty array is returned when the starting * index for an element range is at the end of the array. * * Returns +nil+ if the index (or starting index) are out of range. * * a = [ "a", "b", "c", "d", "e" ] * a[1] => "b" * a[1,2] => ["b", "c"] * a[1..-2] => ["b", "c", "d"] * */ static mrb_value mrb_ary_aget(mrb_state *mrb, mrb_value self) { struct RArray *a = mrb_ary_ptr(self); mrb_int i, len, alen = ARY_LEN(a); mrb_value index; if (mrb_get_args(mrb, "o|i", &index, &len) == 1) { switch (mrb_type(index)) { /* a[n..m] */ case MRB_TT_RANGE: if (mrb_range_beg_len(mrb, index, &i, &len, alen, TRUE) == 1) { return ary_subseq(mrb, a, i, len); } else { return mrb_nil_value(); } case MRB_TT_FIXNUM: return mrb_ary_ref(mrb, self, mrb_fixnum(index)); default: return mrb_ary_ref(mrb, self, aget_index(mrb, index)); } } i = aget_index(mrb, index); if (i < 0) i += alen; if (i < 0 || alen < i) return mrb_nil_value(); if (len < 0) return mrb_nil_value(); if (alen == i) return mrb_ary_new(mrb); if (len > alen - i) len = alen - i; return ary_subseq(mrb, a, i, len); } /* * call-seq: * ary[index] = obj -> obj * ary[start, length] = obj or other_ary or nil -> obj or other_ary or nil * ary[range] = obj or other_ary or nil -> obj or other_ary or nil * * Element Assignment --- Sets the element at +index+, or replaces a subarray * from the +start+ index for +length+ elements, or replaces a subarray * specified by the +range+ of indices. * * If indices are greater than the current capacity of the array, the array * grows automatically. Elements are inserted into the array at +start+ if * +length+ is zero. * * Negative indices will count backward from the end of the array. For * +start+ and +range+ cases the starting index is just before an element. * * An IndexError is raised if a negative index points past the beginning of * the array. * * See also Array#push, and Array#unshift. * * a = Array.new * a[4] = "4"; #=> [nil, nil, nil, nil, "4"] * a[0, 3] = [ 'a', 'b', 'c' ] #=> ["a", "b", "c", nil, "4"] * a[1..2] = [ 1, 2 ] #=> ["a", 1, 2, nil, "4"] * a[0, 2] = "?" #=> ["?", 2, nil, "4"] * a[0..2] = "A" #=> ["A", "4"] * a[-1] = "Z" #=> ["A", "Z"] * a[1..-1] = nil #=> ["A", nil] * a[1..-1] = [] #=> ["A"] * a[0, 0] = [ 1, 2 ] #=> [1, 2, "A"] * a[3, 0] = "B" #=> [1, 2, "A", "B"] */ static mrb_value mrb_ary_aset(mrb_state *mrb, mrb_value self) { mrb_value v1, v2, v3; mrb_int i, len; mrb_ary_modify(mrb, mrb_ary_ptr(self)); if (mrb_get_args(mrb, "oo|o", &v1, &v2, &v3) == 2) { /* a[n..m] = v */ switch (mrb_range_beg_len(mrb, v1, &i, &len, RARRAY_LEN(self), FALSE)) { case 0: /* not range */ mrb_ary_set(mrb, self, aget_index(mrb, v1), v2); break; case 1: /* range */ mrb_ary_splice(mrb, self, i, len, v2); break; case 2: /* out of range */ mrb_raisef(mrb, E_RANGE_ERROR, "%S out of range", v1); break; } return v2; } /* a[n,m] = v */ mrb_ary_splice(mrb, self, aget_index(mrb, v1), aget_index(mrb, v2), v3); return v3; } static mrb_value mrb_ary_delete_at(mrb_state *mrb, mrb_value self) { struct RArray *a = mrb_ary_ptr(self); mrb_int index; mrb_value val; mrb_value *ptr; mrb_int len, alen = ARY_LEN(a); mrb_get_args(mrb, "i", &index); if (index < 0) index += alen; if (index < 0 || alen <= index) return mrb_nil_value(); ary_modify(mrb, a); ptr = ARY_PTR(a); val = ptr[index]; ptr += index; len = alen - index; while (--len) { *ptr = *(ptr+1); ++ptr; } ARY_SET_LEN(a, alen-1); ary_shrink_capa(mrb, a); return val; } static mrb_value mrb_ary_first(mrb_state *mrb, mrb_value self) { struct RArray *a = mrb_ary_ptr(self); mrb_int size, alen = ARY_LEN(a); if (mrb_get_argc(mrb) == 0) { return (alen > 0)? ARY_PTR(a)[0]: mrb_nil_value(); } mrb_get_args(mrb, "|i", &size); if (size < 0) { mrb_raise(mrb, E_ARGUMENT_ERROR, "negative array size"); } if (size > alen) size = alen; if (ARY_SHARED_P(a)) { return ary_subseq(mrb, a, 0, size); } return mrb_ary_new_from_values(mrb, size, ARY_PTR(a)); } static mrb_value mrb_ary_last(mrb_state *mrb, mrb_value self) { struct RArray *a = mrb_ary_ptr(self); mrb_int size, alen = ARY_LEN(a); if (mrb_get_args(mrb, "|i", &size) == 0) return (alen > 0)? ARY_PTR(a)[alen - 1]: mrb_nil_value(); if (size < 0) { mrb_raise(mrb, E_ARGUMENT_ERROR, "negative array size"); } if (size > alen) size = alen; if (ARY_SHARED_P(a) || size > ARY_DEFAULT_LEN) { return ary_subseq(mrb, a, alen - size, size); } return mrb_ary_new_from_values(mrb, size, ARY_PTR(a) + alen - size); } static mrb_value mrb_ary_index_m(mrb_state *mrb, mrb_value self) { mrb_value obj; mrb_int i; mrb_get_args(mrb, "o", &obj); for (i = 0; i < RARRAY_LEN(self); i++) { if (mrb_equal(mrb, RARRAY_PTR(self)[i], obj)) { return mrb_fixnum_value(i); } } return mrb_nil_value(); } static mrb_value mrb_ary_rindex_m(mrb_state *mrb, mrb_value self) { mrb_value obj; mrb_int i, len; mrb_get_args(mrb, "o", &obj); for (i = RARRAY_LEN(self) - 1; i >= 0; i--) { if (mrb_equal(mrb, RARRAY_PTR(self)[i], obj)) { return mrb_fixnum_value(i); } if (i > (len = RARRAY_LEN(self))) { i = len; } } return mrb_nil_value(); } MRB_API mrb_value mrb_ary_splat(mrb_state *mrb, mrb_value v) { mrb_value a, recv_class; if (mrb_array_p(v)) { return v; } if (!mrb_respond_to(mrb, v, mrb_intern_lit(mrb, "to_a"))) { return mrb_ary_new_from_values(mrb, 1, &v); } a = mrb_funcall(mrb, v, "to_a", 0); if (mrb_array_p(a)) { return a; } else if (mrb_nil_p(a)) { return mrb_ary_new_from_values(mrb, 1, &v); } else { recv_class = mrb_obj_value(mrb_obj_class(mrb, v)); mrb_raisef(mrb, E_TYPE_ERROR, "can't convert %S to Array (%S#to_a gives %S)", recv_class, recv_class, mrb_obj_value(mrb_obj_class(mrb, a)) ); /* not reached */ return mrb_undef_value(); } } static mrb_value mrb_ary_size(mrb_state *mrb, mrb_value self) { struct RArray *a = mrb_ary_ptr(self); return mrb_fixnum_value(ARY_LEN(a)); } MRB_API mrb_value mrb_ary_clear(mrb_state *mrb, mrb_value self) { struct RArray *a = mrb_ary_ptr(self); ary_modify(mrb, a); if (ARY_SHARED_P(a)) { mrb_ary_decref(mrb, a->as.heap.aux.shared); ARY_UNSET_SHARED_FLAG(a); } else if (!ARY_EMBED_P(a)){ mrb_free(mrb, a->as.heap.ptr); } ARY_SET_EMBED_LEN(a, 0); return self; } static mrb_value mrb_ary_empty_p(mrb_state *mrb, mrb_value self) { struct RArray *a = mrb_ary_ptr(self); return mrb_bool_value(ARY_LEN(a) == 0); } MRB_API mrb_value mrb_check_array_type(mrb_state *mrb, mrb_value ary) { return mrb_check_convert_type(mrb, ary, MRB_TT_ARRAY, "Array", "to_ary"); } MRB_API mrb_value mrb_ary_entry(mrb_value ary, mrb_int offset) { if (offset < 0) { offset += RARRAY_LEN(ary); } if (offset < 0 || RARRAY_LEN(ary) <= offset) { return mrb_nil_value(); } return RARRAY_PTR(ary)[offset]; } static mrb_value join_ary(mrb_state *mrb, mrb_value ary, mrb_value sep, mrb_value list) { mrb_int i; mrb_value result, val, tmp; /* check recursive */ for (i=0; i 0 && !mrb_nil_p(sep)) { mrb_str_cat_str(mrb, result, sep); } val = RARRAY_PTR(ary)[i]; switch (mrb_type(val)) { case MRB_TT_ARRAY: ary_join: val = join_ary(mrb, val, sep, list); /* fall through */ case MRB_TT_STRING: str_join: mrb_str_cat_str(mrb, result, val); break; default: if (!mrb_immediate_p(val)) { tmp = mrb_check_string_type(mrb, val); if (!mrb_nil_p(tmp)) { val = tmp; goto str_join; } tmp = mrb_check_convert_type(mrb, val, MRB_TT_ARRAY, "Array", "to_ary"); if (!mrb_nil_p(tmp)) { val = tmp; goto ary_join; } } val = mrb_obj_as_string(mrb, val); goto str_join; } } mrb_ary_pop(mrb, list); return result; } MRB_API mrb_value mrb_ary_join(mrb_state *mrb, mrb_value ary, mrb_value sep) { if (!mrb_nil_p(sep)) { sep = mrb_obj_as_string(mrb, sep); } return join_ary(mrb, ary, sep, mrb_ary_new(mrb)); } /* * call-seq: * ary.join(sep="") -> str * * Returns a string created by converting each element of the array to * a string, separated by sep. * * [ "a", "b", "c" ].join #=> "abc" * [ "a", "b", "c" ].join("-") #=> "a-b-c" */ static mrb_value mrb_ary_join_m(mrb_state *mrb, mrb_value ary) { mrb_value sep = mrb_nil_value(); mrb_get_args(mrb, "|S!", &sep); return mrb_ary_join(mrb, ary, sep); } static mrb_value mrb_ary_eq(mrb_state *mrb, mrb_value ary1) { mrb_value ary2; mrb_get_args(mrb, "o", &ary2); if (mrb_obj_equal(mrb, ary1, ary2)) return mrb_true_value(); if (!mrb_array_p(ary2)) { return mrb_false_value(); } if (RARRAY_LEN(ary1) != RARRAY_LEN(ary2)) return mrb_false_value(); return ary2; } static mrb_value mrb_ary_cmp(mrb_state *mrb, mrb_value ary1) { mrb_value ary2; mrb_get_args(mrb, "o", &ary2); if (mrb_obj_equal(mrb, ary1, ary2)) return mrb_fixnum_value(0); if (!mrb_array_p(ary2)) { return mrb_nil_value(); } return ary2; } void mrb_init_array(mrb_state *mrb) { struct RClass *a; mrb->array_class = a = mrb_define_class(mrb, "Array", mrb->object_class); /* 15.2.12 */ MRB_SET_INSTANCE_TT(a, MRB_TT_ARRAY); mrb_define_class_method(mrb, a, "[]", mrb_ary_s_create, MRB_ARGS_ANY()); /* 15.2.12.4.1 */ mrb_define_method(mrb, a, "+", mrb_ary_plus, MRB_ARGS_REQ(1)); /* 15.2.12.5.1 */ mrb_define_method(mrb, a, "*", mrb_ary_times, MRB_ARGS_REQ(1)); /* 15.2.12.5.2 */ mrb_define_method(mrb, a, "<<", mrb_ary_push_m, MRB_ARGS_REQ(1)); /* 15.2.12.5.3 */ mrb_define_method(mrb, a, "[]", mrb_ary_aget, MRB_ARGS_ANY()); /* 15.2.12.5.4 */ mrb_define_method(mrb, a, "[]=", mrb_ary_aset, MRB_ARGS_ANY()); /* 15.2.12.5.5 */ mrb_define_method(mrb, a, "clear", mrb_ary_clear, MRB_ARGS_NONE()); /* 15.2.12.5.6 */ mrb_define_method(mrb, a, "concat", mrb_ary_concat_m, MRB_ARGS_REQ(1)); /* 15.2.12.5.8 */ mrb_define_method(mrb, a, "delete_at", mrb_ary_delete_at, MRB_ARGS_REQ(1)); /* 15.2.12.5.9 */ mrb_define_method(mrb, a, "empty?", mrb_ary_empty_p, MRB_ARGS_NONE()); /* 15.2.12.5.12 */ mrb_define_method(mrb, a, "first", mrb_ary_first, MRB_ARGS_OPT(1)); /* 15.2.12.5.13 */ mrb_define_method(mrb, a, "index", mrb_ary_index_m, MRB_ARGS_REQ(1)); /* 15.2.12.5.14 */ mrb_define_method(mrb, a, "initialize_copy", mrb_ary_replace_m, MRB_ARGS_REQ(1)); /* 15.2.12.5.16 */ mrb_define_method(mrb, a, "join", mrb_ary_join_m, MRB_ARGS_ANY()); /* 15.2.12.5.17 */ mrb_define_method(mrb, a, "last", mrb_ary_last, MRB_ARGS_ANY()); /* 15.2.12.5.18 */ mrb_define_method(mrb, a, "length", mrb_ary_size, MRB_ARGS_NONE()); /* 15.2.12.5.19 */ mrb_define_method(mrb, a, "pop", mrb_ary_pop, MRB_ARGS_NONE()); /* 15.2.12.5.21 */ mrb_define_method(mrb, a, "push", mrb_ary_push_m, MRB_ARGS_ANY()); /* 15.2.12.5.22 */ mrb_define_method(mrb, a, "append", mrb_ary_push_m, MRB_ARGS_ANY()); mrb_define_method(mrb, a, "replace", mrb_ary_replace_m, MRB_ARGS_REQ(1)); /* 15.2.12.5.23 */ mrb_define_method(mrb, a, "reverse", mrb_ary_reverse, MRB_ARGS_NONE()); /* 15.2.12.5.24 */ mrb_define_method(mrb, a, "reverse!", mrb_ary_reverse_bang, MRB_ARGS_NONE()); /* 15.2.12.5.25 */ mrb_define_method(mrb, a, "rindex", mrb_ary_rindex_m, MRB_ARGS_REQ(1)); /* 15.2.12.5.26 */ mrb_define_method(mrb, a, "shift", mrb_ary_shift, MRB_ARGS_NONE()); /* 15.2.12.5.27 */ mrb_define_method(mrb, a, "size", mrb_ary_size, MRB_ARGS_NONE()); /* 15.2.12.5.28 */ mrb_define_method(mrb, a, "slice", mrb_ary_aget, MRB_ARGS_ANY()); /* 15.2.12.5.29 */ mrb_define_method(mrb, a, "unshift", mrb_ary_unshift_m, MRB_ARGS_ANY()); /* 15.2.12.5.30 */ mrb_define_method(mrb, a, "prepend", mrb_ary_unshift_m, MRB_ARGS_ANY()); mrb_define_method(mrb, a, "__ary_eq", mrb_ary_eq, MRB_ARGS_REQ(1)); mrb_define_method(mrb, a, "__ary_cmp", mrb_ary_cmp, MRB_ARGS_REQ(1)); mrb_define_method(mrb, a, "__ary_index", mrb_ary_index_m, MRB_ARGS_REQ(1)); /* kept for mruby-array-ext */ }