#include "ruby/ruby.h"
#include "ruby/util.h"
#include "ruby/st.h"
#include "ruby/encoding.h"
#include "internal.h"
#include "probes.h"
#include "id.h"
#ifndef ARRAY_DEBUG
# define NDEBUG
#endif
#include <assert.h>
#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))
VALUE rb_cArray;
static ID id_cmp, id_div, id_power;
#define ARY_DEFAULT_SIZE 16
#define ARY_MAX_SIZE (LONG_MAX / (int)sizeof(VALUE))
void
rb_mem_clear(register VALUE *mem, register long size)
{
while (size--) {
*mem++ = Qnil;
}
}
static inline void
memfill(register VALUE *mem, register long size, register VALUE val)
{
while (size--) {
*mem++ = val;
}
}
# define ARY_SHARED_P(ary) \
(assert(!FL_TEST((ary), ELTS_SHARED) || !FL_TEST((ary), RARRAY_EMBED_FLAG)), \
FL_TEST((ary),ELTS_SHARED)!=0)
# define ARY_EMBED_P(ary) \
(assert(!FL_TEST((ary), ELTS_SHARED) || !FL_TEST((ary), RARRAY_EMBED_FLAG)), \
FL_TEST((ary), RARRAY_EMBED_FLAG)!=0)
#define ARY_HEAP_PTR(a) (assert(!ARY_EMBED_P(a)), RARRAY(a)->as.heap.ptr)
#define ARY_HEAP_LEN(a) (assert(!ARY_EMBED_P(a)), RARRAY(a)->as.heap.len)
#define ARY_EMBED_PTR(a) (assert(ARY_EMBED_P(a)), RARRAY(a)->as.ary)
#define ARY_EMBED_LEN(a) \
(assert(ARY_EMBED_P(a)), \
(long)((RBASIC(a)->flags >> RARRAY_EMBED_LEN_SHIFT) & \
(RARRAY_EMBED_LEN_MASK >> RARRAY_EMBED_LEN_SHIFT)))
#define ARY_OWNS_HEAP_P(a) (!FL_TEST((a), ELTS_SHARED|RARRAY_EMBED_FLAG))
#define FL_SET_EMBED(a) do { \
assert(!ARY_SHARED_P(a)); \
FL_SET((a), RARRAY_EMBED_FLAG); \
} while (0)
#define FL_UNSET_EMBED(ary) FL_UNSET((ary), RARRAY_EMBED_FLAG|RARRAY_EMBED_LEN_MASK)
#define FL_SET_SHARED(ary) do { \
assert(!ARY_EMBED_P(ary)); \
FL_SET((ary), ELTS_SHARED); \
} while (0)
#define FL_UNSET_SHARED(ary) FL_UNSET((ary), ELTS_SHARED)
#define ARY_SET_PTR(ary, p) do { \
assert(!ARY_EMBED_P(ary)); \
assert(!OBJ_FROZEN(ary)); \
RARRAY(ary)->as.heap.ptr = (p); \
} while (0)
#define ARY_SET_EMBED_LEN(ary, n) do { \
long tmp_n = (n); \
assert(ARY_EMBED_P(ary)); \
assert(!OBJ_FROZEN(ary)); \
RBASIC(ary)->flags &= ~RARRAY_EMBED_LEN_MASK; \
RBASIC(ary)->flags |= (tmp_n) << RARRAY_EMBED_LEN_SHIFT; \
} while (0)
#define ARY_SET_HEAP_LEN(ary, n) do { \
assert(!ARY_EMBED_P(ary)); \
RARRAY(ary)->as.heap.len = (n); \
} while (0)
#define ARY_SET_LEN(ary, n) do { \
if (ARY_EMBED_P(ary)) { \
ARY_SET_EMBED_LEN((ary), (n)); \
} \
else { \
ARY_SET_HEAP_LEN((ary), (n)); \
} \
assert(RARRAY_LEN(ary) == (n)); \
} while (0)
#define ARY_INCREASE_PTR(ary, n) do { \
assert(!ARY_EMBED_P(ary)); \
assert(!OBJ_FROZEN(ary)); \
RARRAY(ary)->as.heap.ptr += (n); \
} while (0)
#define ARY_INCREASE_LEN(ary, n) do { \
assert(!OBJ_FROZEN(ary)); \
if (ARY_EMBED_P(ary)) { \
ARY_SET_EMBED_LEN((ary), RARRAY_LEN(ary)+(n)); \
} \
else { \
RARRAY(ary)->as.heap.len += (n); \
} \
} while (0)
#define ARY_CAPA(ary) (ARY_EMBED_P(ary) ? RARRAY_EMBED_LEN_MAX : \
ARY_SHARED_ROOT_P(ary) ? RARRAY_LEN(ary) : RARRAY(ary)->as.heap.aux.capa)
#define ARY_SET_CAPA(ary, n) do { \
assert(!ARY_EMBED_P(ary)); \
assert(!ARY_SHARED_P(ary)); \
assert(!OBJ_FROZEN(ary)); \
RARRAY(ary)->as.heap.aux.capa = (n); \
} while (0)
#define ARY_SHARED(ary) (assert(ARY_SHARED_P(ary)), RARRAY(ary)->as.heap.aux.shared)
#define ARY_SET_SHARED(ary, value) do { \
assert(!ARY_EMBED_P(ary)); \
assert(ARY_SHARED_P(ary)); \
assert(ARY_SHARED_ROOT_P(value)); \
RARRAY(ary)->as.heap.aux.shared = (value); \
} while (0)
#define RARRAY_SHARED_ROOT_FLAG FL_USER5
#define ARY_SHARED_ROOT_P(ary) (FL_TEST((ary), RARRAY_SHARED_ROOT_FLAG))
#define ARY_SHARED_NUM(ary) \
(assert(ARY_SHARED_ROOT_P(ary)), RARRAY(ary)->as.heap.aux.capa)
#define ARY_SET_SHARED_NUM(ary, value) do { \
assert(ARY_SHARED_ROOT_P(ary)); \
RARRAY(ary)->as.heap.aux.capa = (value); \
} while (0)
#define FL_SET_SHARED_ROOT(ary) do { \
assert(!ARY_EMBED_P(ary)); \
FL_SET((ary), RARRAY_SHARED_ROOT_FLAG); \
} while (0)
static void
ary_resize_capa(VALUE ary, long capacity)
{
assert(RARRAY_LEN(ary) <= capacity);
assert(!OBJ_FROZEN(ary));
assert(!ARY_SHARED_P(ary));
if (capacity > RARRAY_EMBED_LEN_MAX) {
if (ARY_EMBED_P(ary)) {
long len = ARY_EMBED_LEN(ary);
VALUE *ptr = ALLOC_N(VALUE, (capacity));
MEMCPY(ptr, ARY_EMBED_PTR(ary), VALUE, len);
FL_UNSET_EMBED(ary);
ARY_SET_PTR(ary, ptr);
ARY_SET_HEAP_LEN(ary, len);
}
else {
REALLOC_N(RARRAY(ary)->as.heap.ptr, VALUE, (capacity));
}
ARY_SET_CAPA(ary, (capacity));
}
else {
if (!ARY_EMBED_P(ary)) {
long len = RARRAY_LEN(ary);
VALUE *ptr = RARRAY_PTR(ary);
if (len > capacity) len = capacity;
MEMCPY(RARRAY(ary)->as.ary, ptr, VALUE, len);
FL_SET_EMBED(ary);
ARY_SET_LEN(ary, len);
xfree(ptr);
}
}
}
static void
ary_double_capa(VALUE ary, long min)
{
long new_capa = ARY_CAPA(ary) / 2;
if (new_capa < ARY_DEFAULT_SIZE) {
new_capa = ARY_DEFAULT_SIZE;
}
if (new_capa >= ARY_MAX_SIZE - min) {
new_capa = (ARY_MAX_SIZE - min) / 2;
}
new_capa += min;
ary_resize_capa(ary, new_capa);
}
static void
rb_ary_decrement_share(VALUE shared)
{
if (shared) {
long num = ARY_SHARED_NUM(shared) - 1;
if (num == 0) {
rb_ary_free(shared);
rb_gc_force_recycle(shared);
}
else if (num > 0) {
ARY_SET_SHARED_NUM(shared, num);
}
}
}
static void
rb_ary_unshare(VALUE ary)
{
VALUE shared = RARRAY(ary)->as.heap.aux.shared;
rb_ary_decrement_share(shared);
FL_UNSET_SHARED(ary);
}
static inline void
rb_ary_unshare_safe(VALUE ary)
{
if (ARY_SHARED_P(ary) && !ARY_EMBED_P(ary)) {
rb_ary_unshare(ary);
}
}
static VALUE
rb_ary_increment_share(VALUE shared)
{
long num = ARY_SHARED_NUM(shared);
if (num >= 0) {
ARY_SET_SHARED_NUM(shared, num + 1);
}
return shared;
}
static void
rb_ary_set_shared(VALUE ary, VALUE shared)
{
rb_ary_increment_share(shared);
FL_SET_SHARED(ary);
ARY_SET_SHARED(ary, shared);
}
static inline void
rb_ary_modify_check(VALUE ary)
{
rb_check_frozen(ary);
if (!OBJ_UNTRUSTED(ary) && rb_safe_level() >= 4)
rb_raise(rb_eSecurityError, "Insecure: can't modify array");
}
void
rb_ary_modify(VALUE ary)
{
rb_ary_modify_check(ary);
if (ARY_SHARED_P(ary)) {
long len = RARRAY_LEN(ary);
VALUE shared = ARY_SHARED(ary);
if (len <= RARRAY_EMBED_LEN_MAX) {
VALUE *ptr = ARY_HEAP_PTR(ary);
FL_UNSET_SHARED(ary);
FL_SET_EMBED(ary);
MEMCPY(ARY_EMBED_PTR(ary), ptr, VALUE, len);
rb_ary_decrement_share(shared);
ARY_SET_EMBED_LEN(ary, len);
}
else if (ARY_SHARED_NUM(shared) == 1 && len > (RARRAY_LEN(shared)>>1)) {
long shift = RARRAY_PTR(ary) - RARRAY_PTR(shared);
FL_UNSET_SHARED(ary);
ARY_SET_PTR(ary, RARRAY_PTR(shared));
ARY_SET_CAPA(ary, RARRAY_LEN(shared));
MEMMOVE(RARRAY_PTR(ary), RARRAY_PTR(ary)+shift, VALUE, len);
FL_SET_EMBED(shared);
rb_ary_decrement_share(shared);
}
else {
VALUE *ptr = ALLOC_N(VALUE, len);
MEMCPY(ptr, RARRAY_PTR(ary), VALUE, len);
rb_ary_unshare(ary);
ARY_SET_CAPA(ary, len);
ARY_SET_PTR(ary, ptr);
}
}
}
static void
ary_ensure_room_for_push(VALUE ary, long add_len)
{
long new_len = RARRAY_LEN(ary) + add_len;
long capa;
if (ARY_SHARED_P(ary)) {
if (new_len > RARRAY_EMBED_LEN_MAX) {
VALUE shared = ARY_SHARED(ary);
if (ARY_SHARED_NUM(shared) == 1) {
if (RARRAY_PTR(ary) - RARRAY_PTR(shared) + new_len <= RARRAY_LEN(shared)) {
rb_ary_modify_check(ary);
}
else {
rb_ary_modify(ary);
capa = ARY_CAPA(ary);
if (new_len > capa - (capa >> 6)) {
ary_double_capa(ary, new_len);
}
}
return;
}
}
}
rb_ary_modify(ary);
capa = ARY_CAPA(ary);
if (new_len > capa) {
ary_double_capa(ary, new_len);
}
}
VALUE
rb_ary_freeze(VALUE ary)
{
return rb_obj_freeze(ary);
}
static VALUE
rb_ary_frozen_p(VALUE ary)
{
if (OBJ_FROZEN(ary)) return Qtrue;
return Qfalse;
}
VALUE
rb_ary_shared_with_p(VALUE ary1, VALUE ary2)
{
if (!ARY_EMBED_P(ary1) && ARY_SHARED_P(ary1) &&
!ARY_EMBED_P(ary2) && ARY_SHARED_P(ary2) &&
RARRAY(ary1)->as.heap.aux.shared == RARRAY(ary2)->as.heap.aux.shared &&
RARRAY(ary1)->as.heap.len == RARRAY(ary2)->as.heap.len) {
return Qtrue;
}
return Qfalse;
}
static VALUE
ary_alloc(VALUE klass)
{
NEWOBJ_OF(ary, struct RArray, klass, T_ARRAY);
FL_SET_EMBED((VALUE)ary);
ARY_SET_EMBED_LEN((VALUE)ary, 0);
return (VALUE)ary;
}
static VALUE
empty_ary_alloc(VALUE klass)
{
if (RUBY_DTRACE_ARRAY_CREATE_ENABLED()) {
RUBY_DTRACE_ARRAY_CREATE(0, rb_sourcefile(), rb_sourceline());
}
return ary_alloc(klass);
}
static VALUE
ary_new(VALUE klass, long capa)
{
VALUE ary;
if (capa < 0) {
rb_raise(rb_eArgError, "negative array size (or size too big)");
}
if (capa > ARY_MAX_SIZE) {
rb_raise(rb_eArgError, "array size too big");
}
if (RUBY_DTRACE_ARRAY_CREATE_ENABLED()) {
RUBY_DTRACE_ARRAY_CREATE(capa, rb_sourcefile(), rb_sourceline());
}
ary = ary_alloc(klass);
if (capa > RARRAY_EMBED_LEN_MAX) {
FL_UNSET_EMBED(ary);
ARY_SET_PTR(ary, ALLOC_N(VALUE, capa));
ARY_SET_CAPA(ary, capa);
ARY_SET_HEAP_LEN(ary, 0);
}
return ary;
}
VALUE
rb_ary_new2(long capa)
{
return ary_new(rb_cArray, capa);
}
VALUE
rb_ary_new(void)
{
return rb_ary_new2(RARRAY_EMBED_LEN_MAX);
}
#include <stdarg.h>
VALUE
rb_ary_new3(long n, ...)
{
va_list ar;
VALUE ary;
long i;
ary = rb_ary_new2(n);
va_start(ar, n);
for (i=0; i<n; i++) {
RARRAY_PTR(ary)[i] = va_arg(ar, VALUE);
}
va_end(ar);
ARY_SET_LEN(ary, n);
return ary;
}
VALUE
rb_ary_new4(long n, const VALUE *elts)
{
VALUE ary;
ary = rb_ary_new2(n);
if (n > 0 && elts) {
MEMCPY(RARRAY_PTR(ary), elts, VALUE, n);
ARY_SET_LEN(ary, n);
}
return ary;
}
VALUE
rb_ary_tmp_new(long capa)
{
return ary_new(0, capa);
}
void
rb_ary_free(VALUE ary)
{
if (ARY_OWNS_HEAP_P(ary)) {
xfree(ARY_HEAP_PTR(ary));
}
}
RUBY_FUNC_EXPORTED size_t
rb_ary_memsize(VALUE ary)
{
if (ARY_OWNS_HEAP_P(ary)) {
return RARRAY(ary)->as.heap.aux.capa * sizeof(VALUE);
}
else {
return 0;
}
}
static inline void
ary_discard(VALUE ary)
{
rb_ary_free(ary);
RBASIC(ary)->flags |= RARRAY_EMBED_FLAG;
RBASIC(ary)->flags &= ~RARRAY_EMBED_LEN_MASK;
}
static VALUE
ary_make_shared(VALUE ary)
{
assert(!ARY_EMBED_P(ary));
if (ARY_SHARED_P(ary)) {
return ARY_SHARED(ary);
}
else if (ARY_SHARED_ROOT_P(ary)) {
return ary;
}
else if (OBJ_FROZEN(ary)) {
ary_resize_capa(ary, ARY_HEAP_LEN(ary));
FL_SET_SHARED_ROOT(ary);
ARY_SET_SHARED_NUM(ary, 1);
return ary;
}
else {
NEWOBJ_OF(shared, struct RArray, 0, T_ARRAY);
FL_UNSET_EMBED(shared);
ARY_SET_LEN((VALUE)shared, ARY_CAPA(ary));
ARY_SET_PTR((VALUE)shared, RARRAY_PTR(ary));
rb_mem_clear(RARRAY_PTR(shared) + RARRAY_LEN(ary), ARY_CAPA(ary) - RARRAY_LEN(ary));
FL_SET_SHARED_ROOT(shared);
ARY_SET_SHARED_NUM((VALUE)shared, 1);
FL_SET_SHARED(ary);
ARY_SET_SHARED(ary, (VALUE)shared);
OBJ_FREEZE(shared);
return (VALUE)shared;
}
}
static VALUE
ary_make_substitution(VALUE ary)
{
if (RARRAY_LEN(ary) <= RARRAY_EMBED_LEN_MAX) {
VALUE subst = rb_ary_new2(RARRAY_LEN(ary));
MEMCPY(ARY_EMBED_PTR(subst), RARRAY_PTR(ary), VALUE, RARRAY_LEN(ary));
ARY_SET_EMBED_LEN(subst, RARRAY_LEN(ary));
return subst;
}
else {
return rb_ary_increment_share(ary_make_shared(ary));
}
}
VALUE
rb_assoc_new(VALUE car, VALUE cdr)
{
return rb_ary_new3(2, car, cdr);
}
static VALUE
to_ary(VALUE ary)
{
return rb_convert_type(ary, T_ARRAY, "Array", "to_ary");
}
VALUE
rb_check_array_type(VALUE ary)
{
return rb_check_convert_type(ary, T_ARRAY, "Array", "to_ary");
}
static VALUE
rb_ary_s_try_convert(VALUE dummy, VALUE ary)
{
return rb_check_array_type(ary);
}
static VALUE
rb_ary_initialize(int argc, VALUE *argv, VALUE ary)
{
long len;
VALUE size, val;
rb_ary_modify(ary);
if (argc == 0) {
if (ARY_OWNS_HEAP_P(ary) && RARRAY_PTR(ary)) {
xfree(RARRAY_PTR(ary));
}
rb_ary_unshare_safe(ary);
FL_SET_EMBED(ary);
ARY_SET_EMBED_LEN(ary, 0);
if (rb_block_given_p()) {
rb_warning("given block not used");
}
return ary;
}
rb_scan_args(argc, argv, "02", &size, &val);
if (argc == 1 && !FIXNUM_P(size)) {
val = rb_check_array_type(size);
if (!NIL_P(val)) {
rb_ary_replace(ary, val);
return ary;
}
}
len = NUM2LONG(size);
if (len < 0) {
rb_raise(rb_eArgError, "negative array size");
}
if (len > ARY_MAX_SIZE) {
rb_raise(rb_eArgError, "array size too big");
}
rb_ary_modify(ary);
ary_resize_capa(ary, len);
if (rb_block_given_p()) {
long i;
if (argc == 2) {
rb_warn("block supersedes default value argument");
}
for (i=0; i<len; i++) {
rb_ary_store(ary, i, rb_yield(LONG2NUM(i)));
ARY_SET_LEN(ary, i + 1);
}
}
else {
memfill(RARRAY_PTR(ary), len, val);
ARY_SET_LEN(ary, len);
}
return ary;
}
static VALUE
rb_ary_s_create(int argc, VALUE *argv, VALUE klass)
{
VALUE ary = ary_new(klass, argc);
if (argc > 0 && argv) {
MEMCPY(RARRAY_PTR(ary), argv, VALUE, argc);
ARY_SET_LEN(ary, argc);
}
return ary;
}
void
rb_ary_store(VALUE ary, long idx, VALUE val)
{
if (idx < 0) {
idx += RARRAY_LEN(ary);
if (idx < 0) {
rb_raise(rb_eIndexError, "index %ld too small for array; minimum: %ld",
idx - RARRAY_LEN(ary), -RARRAY_LEN(ary));
}
}
else if (idx >= ARY_MAX_SIZE) {
rb_raise(rb_eIndexError, "index %ld too big", idx);
}
rb_ary_modify(ary);
if (idx >= ARY_CAPA(ary)) {
ary_double_capa(ary, idx);
}
if (idx > RARRAY_LEN(ary)) {
rb_mem_clear(RARRAY_PTR(ary) + RARRAY_LEN(ary),
idx-RARRAY_LEN(ary) + 1);
}
if (idx >= RARRAY_LEN(ary)) {
ARY_SET_LEN(ary, idx + 1);
}
RARRAY_PTR(ary)[idx] = val;
}
static VALUE
ary_make_partial(VALUE ary, VALUE klass, long offset, long len)
{
assert(offset >= 0);
assert(len >= 0);
assert(offset+len <= RARRAY_LEN(ary));
if (len <= RARRAY_EMBED_LEN_MAX) {
VALUE result = ary_alloc(klass);
MEMCPY(ARY_EMBED_PTR(result), RARRAY_PTR(ary) + offset, VALUE, len);
ARY_SET_EMBED_LEN(result, len);
return result;
}
else {
VALUE shared, result = ary_alloc(klass);
FL_UNSET_EMBED(result);
shared = ary_make_shared(ary);
ARY_SET_PTR(result, RARRAY_PTR(ary));
ARY_SET_LEN(result, RARRAY_LEN(ary));
rb_ary_set_shared(result, shared);
ARY_INCREASE_PTR(result, offset);
ARY_SET_LEN(result, len);
return result;
}
}
static VALUE
ary_make_shared_copy(VALUE ary)
{
return ary_make_partial(ary, rb_obj_class(ary), 0, RARRAY_LEN(ary));
}
enum ary_take_pos_flags
{
ARY_TAKE_FIRST = 0,
ARY_TAKE_LAST = 1
};
static VALUE
ary_take_first_or_last(int argc, VALUE *argv, VALUE ary, enum ary_take_pos_flags last)
{
VALUE nv;
long n;
long offset = 0;
rb_scan_args(argc, argv, "1", &nv);
n = NUM2LONG(nv);
if (n > RARRAY_LEN(ary)) {
n = RARRAY_LEN(ary);
}
else if (n < 0) {
rb_raise(rb_eArgError, "negative array size");
}
if (last) {
offset = RARRAY_LEN(ary) - n;
}
return ary_make_partial(ary, rb_cArray, offset, n);
}
VALUE
rb_ary_push(VALUE ary, VALUE item)
{
long idx = RARRAY_LEN(ary);
ary_ensure_room_for_push(ary, 1);
RARRAY_PTR(ary)[idx] = item;
ARY_SET_LEN(ary, idx + 1);
return ary;
}
VALUE
rb_ary_cat(VALUE ary, const VALUE *ptr, long len)
{
long oldlen = RARRAY_LEN(ary);
ary_ensure_room_for_push(ary, len);
MEMCPY(RARRAY_PTR(ary) + oldlen, ptr, VALUE, len);
ARY_SET_LEN(ary, oldlen + len);
return ary;
}
static VALUE
rb_ary_push_m(int argc, VALUE *argv, VALUE ary)
{
return rb_ary_cat(ary, argv, argc);
}
VALUE
rb_ary_pop(VALUE ary)
{
long n;
rb_ary_modify_check(ary);
if (RARRAY_LEN(ary) == 0) return Qnil;
if (ARY_OWNS_HEAP_P(ary) &&
RARRAY_LEN(ary) * 3 < ARY_CAPA(ary) &&
ARY_CAPA(ary) > ARY_DEFAULT_SIZE)
{
ary_resize_capa(ary, RARRAY_LEN(ary) * 2);
}
n = RARRAY_LEN(ary)-1;
ARY_SET_LEN(ary, n);
return RARRAY_PTR(ary)[n];
}
static VALUE
rb_ary_pop_m(int argc, VALUE *argv, VALUE ary)
{
VALUE result;
if (argc == 0) {
return rb_ary_pop(ary);
}
rb_ary_modify_check(ary);
result = ary_take_first_or_last(argc, argv, ary, ARY_TAKE_LAST);
ARY_INCREASE_LEN(ary, -RARRAY_LEN(result));
return result;
}
VALUE
rb_ary_shift(VALUE ary)
{
VALUE top;
rb_ary_modify_check(ary);
if (RARRAY_LEN(ary) == 0) return Qnil;
top = RARRAY_PTR(ary)[0];
if (!ARY_SHARED_P(ary)) {
if (RARRAY_LEN(ary) < ARY_DEFAULT_SIZE) {
MEMMOVE(RARRAY_PTR(ary), RARRAY_PTR(ary)+1, VALUE, RARRAY_LEN(ary)-1);
ARY_INCREASE_LEN(ary, -1);
return top;
}
assert(!ARY_EMBED_P(ary));
RARRAY_PTR(ary)[0] = Qnil;
ary_make_shared(ary);
}
else if (ARY_SHARED_NUM(ARY_SHARED(ary)) == 1) {
RARRAY_PTR(ary)[0] = Qnil;
}
ARY_INCREASE_PTR(ary, 1);
ARY_INCREASE_LEN(ary, -1);
return top;
}
static VALUE
rb_ary_shift_m(int argc, VALUE *argv, VALUE ary)
{
VALUE result;
long n;
if (argc == 0) {
return rb_ary_shift(ary);
}
rb_ary_modify_check(ary);
result = ary_take_first_or_last(argc, argv, ary, ARY_TAKE_FIRST);
n = RARRAY_LEN(result);
if (ARY_SHARED_P(ary)) {
if (ARY_SHARED_NUM(ARY_SHARED(ary)) == 1) {
rb_mem_clear(RARRAY_PTR(ary), n);
}
ARY_INCREASE_PTR(ary, n);
}
else {
MEMMOVE(RARRAY_PTR(ary), RARRAY_PTR(ary)+n, VALUE, RARRAY_LEN(ary)-n);
}
ARY_INCREASE_LEN(ary, -n);
return result;
}
static void
ary_ensure_room_for_unshift(VALUE ary, int argc)
{
long len = RARRAY_LEN(ary);
long new_len = len + argc;
long capa;
VALUE *head, *sharedp;
if (ARY_SHARED_P(ary)) {
VALUE shared = ARY_SHARED(ary);
capa = RARRAY_LEN(shared);
if (ARY_SHARED_NUM(shared) == 1 && capa > new_len) {
head = RARRAY_PTR(ary);
sharedp = RARRAY_PTR(shared);
goto makeroom_if_need;
}
}
rb_ary_modify(ary);
capa = ARY_CAPA(ary);
if (capa - (capa >> 6) <= new_len) {
ary_double_capa(ary, new_len);
}
if (new_len > ARY_DEFAULT_SIZE * 4) {
capa = ARY_CAPA(ary);
ary_make_shared(ary);
head = sharedp = RARRAY_PTR(ary);
goto makeroom;
makeroom_if_need:
if (head - sharedp < argc) {
long room;
makeroom:
room = capa - new_len;
room -= room >> 4;
MEMMOVE(sharedp + argc + room, head, VALUE, len);
head = sharedp + argc + room;
}
ARY_SET_PTR(ary, head - argc);
}
else {
MEMMOVE(RARRAY_PTR(ary) + argc, RARRAY_PTR(ary), VALUE, len);
}
}
static VALUE
rb_ary_unshift_m(int argc, VALUE *argv, VALUE ary)
{
long len = RARRAY_LEN(ary);
if (argc == 0) {
rb_ary_modify_check(ary);
return ary;
}
ary_ensure_room_for_unshift(ary, argc);
MEMCPY(RARRAY_PTR(ary), argv, VALUE, argc);
ARY_SET_LEN(ary, len + argc);
return ary;
}
VALUE
rb_ary_unshift(VALUE ary, VALUE item)
{
return rb_ary_unshift_m(1,&item,ary);
}
static inline VALUE
rb_ary_elt(VALUE ary, long offset)
{
if (RARRAY_LEN(ary) == 0) return Qnil;
if (offset < 0 || RARRAY_LEN(ary) <= offset) {
return Qnil;
}
return RARRAY_PTR(ary)[offset];
}
VALUE
rb_ary_entry(VALUE ary, long offset)
{
if (offset < 0) {
offset += RARRAY_LEN(ary);
}
return rb_ary_elt(ary, offset);
}
VALUE
rb_ary_subseq(VALUE ary, long beg, long len)
{
VALUE klass;
if (beg > RARRAY_LEN(ary)) return Qnil;
if (beg < 0 || len < 0) return Qnil;
if (RARRAY_LEN(ary) < len || RARRAY_LEN(ary) < beg + len) {
len = RARRAY_LEN(ary) - beg;
}
klass = rb_obj_class(ary);
if (len == 0) return ary_new(klass, 0);
return ary_make_partial(ary, klass, beg, len);
}
VALUE
rb_ary_aref(int argc, VALUE *argv, VALUE ary)
{
VALUE arg;
long beg, len;
if (argc == 2) {
beg = NUM2LONG(argv[0]);
len = NUM2LONG(argv[1]);
if (beg < 0) {
beg += RARRAY_LEN(ary);
}
return rb_ary_subseq(ary, beg, len);
}
if (argc != 1) {
rb_scan_args(argc, argv, "11", NULL, NULL);
}
arg = argv[0];
if (FIXNUM_P(arg)) {
return rb_ary_entry(ary, FIX2LONG(arg));
}
switch (rb_range_beg_len(arg, &beg, &len, RARRAY_LEN(ary), 0)) {
case Qfalse:
break;
case Qnil:
return Qnil;
default:
return rb_ary_subseq(ary, beg, len);
}
return rb_ary_entry(ary, NUM2LONG(arg));
}
static VALUE
rb_ary_at(VALUE ary, VALUE pos)
{
return rb_ary_entry(ary, NUM2LONG(pos));
}
static VALUE
rb_ary_first(int argc, VALUE *argv, VALUE ary)
{
if (argc == 0) {
if (RARRAY_LEN(ary) == 0) return Qnil;
return RARRAY_PTR(ary)[0];
}
else {
return ary_take_first_or_last(argc, argv, ary, ARY_TAKE_FIRST);
}
}
VALUE
rb_ary_last(int argc, VALUE *argv, VALUE ary)
{
if (argc == 0) {
if (RARRAY_LEN(ary) == 0) return Qnil;
return RARRAY_PTR(ary)[RARRAY_LEN(ary)-1];
}
else {
return ary_take_first_or_last(argc, argv, ary, ARY_TAKE_LAST);
}
}
static VALUE
rb_ary_fetch(int argc, VALUE *argv, VALUE ary)
{
VALUE pos, ifnone;
long block_given;
long idx;
rb_scan_args(argc, argv, "11", &pos, &ifnone);
block_given = rb_block_given_p();
if (block_given && argc == 2) {
rb_warn("block supersedes default value argument");
}
idx = NUM2LONG(pos);
if (idx < 0) {
idx += RARRAY_LEN(ary);
}
if (idx < 0 || RARRAY_LEN(ary) <= idx) {
if (block_given) return rb_yield(pos);
if (argc == 1) {
rb_raise(rb_eIndexError, "index %ld outside of array bounds: %ld...%ld",
idx - (idx < 0 ? RARRAY_LEN(ary) : 0), -RARRAY_LEN(ary), RARRAY_LEN(ary));
}
return ifnone;
}
return RARRAY_PTR(ary)[idx];
}
static VALUE
rb_ary_index(int argc, VALUE *argv, VALUE ary)
{
VALUE val;
long i;
if (argc == 0) {
RETURN_ENUMERATOR(ary, 0, 0);
for (i=0; i<RARRAY_LEN(ary); i++) {
if (RTEST(rb_yield(RARRAY_PTR(ary)[i]))) {
return LONG2NUM(i);
}
}
return Qnil;
}
rb_scan_args(argc, argv, "1", &val);
if (rb_block_given_p())
rb_warn("given block not used");
for (i=0; i<RARRAY_LEN(ary); i++) {
if (rb_equal(RARRAY_PTR(ary)[i], val))
return LONG2NUM(i);
}
return Qnil;
}
static VALUE
rb_ary_rindex(int argc, VALUE *argv, VALUE ary)
{
VALUE val;
long i = RARRAY_LEN(ary);
if (argc == 0) {
RETURN_ENUMERATOR(ary, 0, 0);
while (i--) {
if (RTEST(rb_yield(RARRAY_PTR(ary)[i])))
return LONG2NUM(i);
if (i > RARRAY_LEN(ary)) {
i = RARRAY_LEN(ary);
}
}
return Qnil;
}
rb_scan_args(argc, argv, "1", &val);
if (rb_block_given_p())
rb_warn("given block not used");
while (i--) {
if (rb_equal(RARRAY_PTR(ary)[i], val))
return LONG2NUM(i);
if (i > RARRAY_LEN(ary)) {
i = RARRAY_LEN(ary);
}
}
return Qnil;
}
VALUE
rb_ary_to_ary(VALUE obj)
{
VALUE tmp = rb_check_array_type(obj);
if (!NIL_P(tmp)) return tmp;
return rb_ary_new3(1, obj);
}
static void
rb_ary_splice(VALUE ary, long beg, long len, VALUE rpl)
{
long rlen;
if (len < 0) rb_raise(rb_eIndexError, "negative length (%ld)", len);
if (beg < 0) {
beg += RARRAY_LEN(ary);
if (beg < 0) {
rb_raise(rb_eIndexError, "index %ld too small for array; minimum: %ld",
beg - RARRAY_LEN(ary), -RARRAY_LEN(ary));
}
}
if (RARRAY_LEN(ary) < len || RARRAY_LEN(ary) < beg + len) {
len = RARRAY_LEN(ary) - beg;
}
if (rpl == Qundef) {
rlen = 0;
}
else {
rpl = rb_ary_to_ary(rpl);
rlen = RARRAY_LEN(rpl);
}
if (beg >= RARRAY_LEN(ary)) {
if (beg > ARY_MAX_SIZE - rlen) {
rb_raise(rb_eIndexError, "index %ld too big", beg);
}
ary_ensure_room_for_push(ary, rlen-len);
len = beg + rlen;
rb_mem_clear(RARRAY_PTR(ary) + RARRAY_LEN(ary), beg - RARRAY_LEN(ary));
if (rlen > 0) {
MEMCPY(RARRAY_PTR(ary) + beg, RARRAY_PTR(rpl), VALUE, rlen);
}
ARY_SET_LEN(ary, len);
}
else {
long alen;
rb_ary_modify(ary);
alen = RARRAY_LEN(ary) + rlen - len;
if (alen >= ARY_CAPA(ary)) {
ary_double_capa(ary, alen);
}
if (len != rlen) {
MEMMOVE(RARRAY_PTR(ary) + beg + rlen, RARRAY_PTR(ary) + beg + len,
VALUE, RARRAY_LEN(ary) - (beg + len));
ARY_SET_LEN(ary, alen);
}
if (rlen > 0) {
MEMMOVE(RARRAY_PTR(ary) + beg, RARRAY_PTR(rpl), VALUE, rlen);
}
}
RB_GC_GUARD(rpl);
}
void
rb_ary_set_len(VALUE ary, long len)
{
long capa;
rb_ary_modify_check(ary);
if (ARY_SHARED_P(ary)) {
rb_raise(rb_eRuntimeError, "can't set length of shared ");
}
if (len > (capa = (long)ARY_CAPA(ary))) {
rb_bug("probable buffer overflow: %ld for %ld", len, capa);
}
ARY_SET_LEN(ary, len);
}
VALUE
rb_ary_resize(VALUE ary, long len)
{
long olen;
rb_ary_modify(ary);
olen = RARRAY_LEN(ary);
if (len == olen) return ary;
if (len > ARY_MAX_SIZE) {
rb_raise(rb_eIndexError, "index %ld too big", len);
}
if (len > olen) {
if (len >= ARY_CAPA(ary)) {
ary_double_capa(ary, len);
}
rb_mem_clear(RARRAY_PTR(ary) + olen, len - olen);
ARY_SET_LEN(ary, len);
}
else if (ARY_EMBED_P(ary)) {
ARY_SET_EMBED_LEN(ary, len);
}
else if (len <= RARRAY_EMBED_LEN_MAX) {
VALUE tmp[RARRAY_EMBED_LEN_MAX];
MEMCPY(tmp, ARY_HEAP_PTR(ary), VALUE, len);
ary_discard(ary);
MEMCPY(ARY_EMBED_PTR(ary), tmp, VALUE, len);
ARY_SET_EMBED_LEN(ary, len);
}
else {
if (olen > len + ARY_DEFAULT_SIZE) {
REALLOC_N(RARRAY(ary)->as.heap.ptr, VALUE, len);
ARY_SET_CAPA(ary, len);
}
ARY_SET_HEAP_LEN(ary, len);
}
return ary;
}
static VALUE
rb_ary_aset(int argc, VALUE *argv, VALUE ary)
{
long offset, beg, len;
if (argc == 3) {
rb_ary_modify_check(ary);
beg = NUM2LONG(argv[0]);
len = NUM2LONG(argv[1]);
rb_ary_splice(ary, beg, len, argv[2]);
return argv[2];
}
rb_check_arity(argc, 2, 2);
rb_ary_modify_check(ary);
if (FIXNUM_P(argv[0])) {
offset = FIX2LONG(argv[0]);
goto fixnum;
}
if (rb_range_beg_len(argv[0], &beg, &len, RARRAY_LEN(ary), 1)) {
rb_ary_splice(ary, beg, len, argv[1]);
return argv[1];
}
offset = NUM2LONG(argv[0]);
fixnum:
rb_ary_store(ary, offset, argv[1]);
return argv[1];
}
static VALUE
rb_ary_insert(int argc, VALUE *argv, VALUE ary)
{
long pos;
rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);
rb_ary_modify_check(ary);
if (argc == 1) return ary;
pos = NUM2LONG(argv[0]);
if (pos == -1) {
pos = RARRAY_LEN(ary);
}
if (pos < 0) {
pos++;
}
rb_ary_splice(ary, pos, 0, rb_ary_new4(argc - 1, argv + 1));
return ary;
}
static VALUE
rb_ary_length(VALUE ary);
VALUE
rb_ary_each(VALUE array)
{
long i;
volatile VALUE ary = array;
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
for (i=0; i<RARRAY_LEN(ary); i++) {
rb_yield(RARRAY_PTR(ary)[i]);
}
return ary;
}
static VALUE
rb_ary_each_index(VALUE ary)
{
long i;
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
for (i=0; i<RARRAY_LEN(ary); i++) {
rb_yield(LONG2NUM(i));
}
return ary;
}
static VALUE
rb_ary_reverse_each(VALUE ary)
{
long len;
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
len = RARRAY_LEN(ary);
while (len--) {
rb_yield(RARRAY_PTR(ary)[len]);
if (RARRAY_LEN(ary) < len) {
len = RARRAY_LEN(ary);
}
}
return ary;
}
static VALUE
rb_ary_length(VALUE ary)
{
long len = RARRAY_LEN(ary);
return LONG2NUM(len);
}
static VALUE
rb_ary_empty_p(VALUE ary)
{
if (RARRAY_LEN(ary) == 0)
return Qtrue;
return Qfalse;
}
VALUE
rb_ary_dup(VALUE ary)
{
VALUE dup = rb_ary_new2(RARRAY_LEN(ary));
MEMCPY(RARRAY_PTR(dup), RARRAY_PTR(ary), VALUE, RARRAY_LEN(ary));
ARY_SET_LEN(dup, RARRAY_LEN(ary));
return dup;
}
VALUE
rb_ary_resurrect(VALUE ary)
{
return rb_ary_new4(RARRAY_LEN(ary), RARRAY_PTR(ary));
}
extern VALUE rb_output_fs;
static void ary_join_1(VALUE obj, VALUE ary, VALUE sep, long i, VALUE result, int *first);
static VALUE
recursive_join(VALUE obj, VALUE argp, int recur)
{
VALUE *arg = (VALUE *)argp;
VALUE ary = arg[0];
VALUE sep = arg[1];
VALUE result = arg[2];
int *first = (int *)arg[3];
if (recur) {
rb_raise(rb_eArgError, "recursive array join");
}
else {
ary_join_1(obj, ary, sep, 0, result, first);
}
return Qnil;
}
static void
ary_join_0(VALUE ary, VALUE sep, long max, VALUE result)
{
long i;
VALUE val;
if (max > 0) rb_enc_copy(result, RARRAY_PTR(ary)[0]);
for (i=0; i<max; i++) {
val = RARRAY_PTR(ary)[i];
if (i > 0 && !NIL_P(sep))
rb_str_buf_append(result, sep);
rb_str_buf_append(result, val);
if (OBJ_TAINTED(val)) OBJ_TAINT(result);
if (OBJ_UNTRUSTED(val)) OBJ_TAINT(result);
}
}
static void
ary_join_1(VALUE obj, VALUE ary, VALUE sep, long i, VALUE result, int *first)
{
VALUE val, tmp;
for (; i<RARRAY_LEN(ary); i++) {
if (i > 0 && !NIL_P(sep))
rb_str_buf_append(result, sep);
val = RARRAY_PTR(ary)[i];
switch (TYPE(val)) {
case T_STRING:
str_join:
rb_str_buf_append(result, val);
*first = FALSE;
break;
case T_ARRAY:
obj = val;
ary_join:
if (val == ary) {
rb_raise(rb_eArgError, "recursive array join");
}
else {
VALUE args[4];
args[0] = val;
args[1] = sep;
args[2] = result;
args[3] = (VALUE)first;
rb_exec_recursive(recursive_join, obj, (VALUE)args);
}
break;
default:
tmp = rb_check_string_type(val);
if (!NIL_P(tmp)) {
val = tmp;
goto str_join;
}
tmp = rb_check_convert_type(val, T_ARRAY, "Array", "to_ary");
if (!NIL_P(tmp)) {
obj = val;
val = tmp;
goto ary_join;
}
val = rb_obj_as_string(val);
if (*first) {
rb_enc_copy(result, val);
*first = FALSE;
}
goto str_join;
}
}
}
VALUE
rb_ary_join(VALUE ary, VALUE sep)
{
long len = 1, i;
int taint = FALSE;
int untrust = FALSE;
VALUE val, tmp, result;
if (RARRAY_LEN(ary) == 0) return rb_usascii_str_new(0, 0);
if (OBJ_TAINTED(ary)) taint = TRUE;
if (OBJ_UNTRUSTED(ary)) untrust = TRUE;
if (!NIL_P(sep)) {
StringValue(sep);
len += RSTRING_LEN(sep) * (RARRAY_LEN(ary) - 1);
}
for (i=0; i<RARRAY_LEN(ary); i++) {
val = RARRAY_PTR(ary)[i];
tmp = rb_check_string_type(val);
if (NIL_P(tmp) || tmp != val) {
int first;
result = rb_str_buf_new(len + (RARRAY_LEN(ary)-i)*10);
rb_enc_associate(result, rb_usascii_encoding());
if (taint) OBJ_TAINT(result);
if (untrust) OBJ_UNTRUST(result);
ary_join_0(ary, sep, i, result);
first = i == 0;
ary_join_1(ary, ary, sep, i, result, &first);
return result;
}
len += RSTRING_LEN(tmp);
}
result = rb_str_buf_new(len);
if (taint) OBJ_TAINT(result);
if (untrust) OBJ_UNTRUST(result);
ary_join_0(ary, sep, RARRAY_LEN(ary), result);
return result;
}
static VALUE
rb_ary_join_m(int argc, VALUE *argv, VALUE ary)
{
VALUE sep;
rb_scan_args(argc, argv, "01", &sep);
if (NIL_P(sep)) sep = rb_output_fs;
return rb_ary_join(ary, sep);
}
static VALUE
inspect_ary(VALUE ary, VALUE dummy, int recur)
{
int tainted = OBJ_TAINTED(ary);
int untrust = OBJ_UNTRUSTED(ary);
long i;
VALUE s, str;
if (recur) return rb_usascii_str_new_cstr("[...]");
str = rb_str_buf_new2("[");
for (i=0; i<RARRAY_LEN(ary); i++) {
s = rb_inspect(RARRAY_PTR(ary)[i]);
if (OBJ_TAINTED(s)) tainted = TRUE;
if (OBJ_UNTRUSTED(s)) untrust = TRUE;
if (i > 0) rb_str_buf_cat2(str, ", ");
else rb_enc_copy(str, s);
rb_str_buf_append(str, s);
}
rb_str_buf_cat2(str, "]");
if (tainted) OBJ_TAINT(str);
if (untrust) OBJ_UNTRUST(str);
return str;
}
static VALUE
rb_ary_inspect(VALUE ary)
{
if (RARRAY_LEN(ary) == 0) return rb_usascii_str_new2("[]");
return rb_exec_recursive(inspect_ary, ary, 0);
}
VALUE
rb_ary_to_s(VALUE ary)
{
return rb_ary_inspect(ary);
}
static VALUE
rb_ary_to_a(VALUE ary)
{
if (rb_obj_class(ary) != rb_cArray) {
VALUE dup = rb_ary_new2(RARRAY_LEN(ary));
rb_ary_replace(dup, ary);
return dup;
}
return ary;
}
static VALUE
rb_ary_to_ary_m(VALUE ary)
{
return ary;
}
static void
ary_reverse(VALUE *p1, VALUE *p2)
{
while (p1 < p2) {
VALUE tmp = *p1;
*p1++ = *p2;
*p2-- = tmp;
}
}
VALUE
rb_ary_reverse(VALUE ary)
{
VALUE *p1, *p2;
rb_ary_modify(ary);
if (RARRAY_LEN(ary) > 1) {
p1 = RARRAY_PTR(ary);
p2 = p1 + RARRAY_LEN(ary) - 1;
ary_reverse(p1, p2);
}
return ary;
}
static VALUE
rb_ary_reverse_bang(VALUE ary)
{
return rb_ary_reverse(ary);
}
static VALUE
rb_ary_reverse_m(VALUE ary)
{
long len = RARRAY_LEN(ary);
VALUE dup = rb_ary_new2(len);
if (len > 0) {
VALUE *p1 = RARRAY_PTR(ary);
VALUE *p2 = RARRAY_PTR(dup) + len - 1;
do *p2-- = *p1++; while (--len > 0);
}
ARY_SET_LEN(dup, RARRAY_LEN(ary));
return dup;
}
static inline long
rotate_count(long cnt, long len)
{
return (cnt < 0) ? (len - (~cnt % len) - 1) : (cnt % len);
}
VALUE
rb_ary_rotate(VALUE ary, long cnt)
{
rb_ary_modify(ary);
if (cnt != 0) {
VALUE *ptr = RARRAY_PTR(ary);
long len = RARRAY_LEN(ary);
if (len > 0 && (cnt = rotate_count(cnt, len)) > 0) {
--len;
if (cnt < len) ary_reverse(ptr + cnt, ptr + len);
if (--cnt > 0) ary_reverse(ptr, ptr + cnt);
if (len > 0) ary_reverse(ptr, ptr + len);
return ary;
}
}
return Qnil;
}
static VALUE
rb_ary_rotate_bang(int argc, VALUE *argv, VALUE ary)
{
long n = 1;
switch (argc) {
case 1: n = NUM2LONG(argv[0]);
case 0: break;
default: rb_scan_args(argc, argv, "01", NULL);
}
rb_ary_rotate(ary, n);
return ary;
}
static VALUE
rb_ary_rotate_m(int argc, VALUE *argv, VALUE ary)
{
VALUE rotated, *ptr, *ptr2;
long len, cnt = 1;
switch (argc) {
case 1: cnt = NUM2LONG(argv[0]);
case 0: break;
default: rb_scan_args(argc, argv, "01", NULL);
}
len = RARRAY_LEN(ary);
rotated = rb_ary_new2(len);
if (len > 0) {
cnt = rotate_count(cnt, len);
ptr = RARRAY_PTR(ary);
ptr2 = RARRAY_PTR(rotated);
len -= cnt;
MEMCPY(ptr2, ptr + cnt, VALUE, len);
MEMCPY(ptr2 + len, ptr, VALUE, cnt);
}
ARY_SET_LEN(rotated, RARRAY_LEN(ary));
return rotated;
}
struct ary_sort_data {
VALUE ary;
int opt_methods;
int opt_inited;
};
enum {
sort_opt_Fixnum,
sort_opt_String,
sort_optimizable_count
};
#define STRING_P(s) (RB_TYPE_P((s), T_STRING) && CLASS_OF(s) == rb_cString)
#define SORT_OPTIMIZABLE_BIT(type) (1U << TOKEN_PASTE(sort_opt_,type))
#define SORT_OPTIMIZABLE(data, type) \
(((data)->opt_inited & SORT_OPTIMIZABLE_BIT(type)) ? \
((data)->opt_methods & SORT_OPTIMIZABLE_BIT(type)) : \
(((data)->opt_inited |= SORT_OPTIMIZABLE_BIT(type)), \
rb_method_basic_definition_p(TOKEN_PASTE(rb_c,type), id_cmp) && \
((data)->opt_methods |= SORT_OPTIMIZABLE_BIT(type))))
static VALUE
sort_reentered(VALUE ary)
{
if (RBASIC(ary)->klass) {
rb_raise(rb_eRuntimeError, "sort reentered");
}
return Qnil;
}
static int
sort_1(const void *ap, const void *bp, void *dummy)
{
struct ary_sort_data *data = dummy;
VALUE retval = sort_reentered(data->ary);
VALUE a = *(const VALUE *)ap, b = *(const VALUE *)bp;
int n;
retval = rb_yield_values(2, a, b);
n = rb_cmpint(retval, a, b);
sort_reentered(data->ary);
return n;
}
static int
sort_2(const void *ap, const void *bp, void *dummy)
{
struct ary_sort_data *data = dummy;
VALUE retval = sort_reentered(data->ary);
VALUE a = *(const VALUE *)ap, b = *(const VALUE *)bp;
int n;
if (FIXNUM_P(a) && FIXNUM_P(b) && SORT_OPTIMIZABLE(data, Fixnum)) {
if ((long)a > (long)b) return 1;
if ((long)a < (long)b) return -1;
return 0;
}
if (STRING_P(a) && STRING_P(b) && SORT_OPTIMIZABLE(data, String)) {
return rb_str_cmp(a, b);
}
retval = rb_funcall(a, id_cmp, 1, b);
n = rb_cmpint(retval, a, b);
sort_reentered(data->ary);
return n;
}
VALUE
rb_ary_sort_bang(VALUE ary)
{
rb_ary_modify(ary);
assert(!ARY_SHARED_P(ary));
if (RARRAY_LEN(ary) > 1) {
VALUE tmp = ary_make_substitution(ary);
struct ary_sort_data data;
long len = RARRAY_LEN(ary);
RBASIC(tmp)->klass = 0;
data.ary = tmp;
data.opt_methods = 0;
data.opt_inited = 0;
ruby_qsort(RARRAY_PTR(tmp), len, sizeof(VALUE),
rb_block_given_p()?sort_1:sort_2, &data);
if (ARY_EMBED_P(tmp)) {
assert(ARY_EMBED_P(tmp));
if (ARY_SHARED_P(ary)) {
rb_ary_unshare(ary);
}
FL_SET_EMBED(ary);
MEMCPY(RARRAY_PTR(ary), ARY_EMBED_PTR(tmp), VALUE, ARY_EMBED_LEN(tmp));
ARY_SET_LEN(ary, ARY_EMBED_LEN(tmp));
}
else {
assert(!ARY_EMBED_P(tmp));
if (ARY_HEAP_PTR(ary) == ARY_HEAP_PTR(tmp)) {
assert(!ARY_EMBED_P(ary));
FL_UNSET_SHARED(ary);
ARY_SET_CAPA(ary, RARRAY_LEN(tmp));
}
else {
assert(!ARY_SHARED_P(tmp));
if (ARY_EMBED_P(ary)) {
FL_UNSET_EMBED(ary);
}
else if (ARY_SHARED_P(ary)) {
rb_ary_unshare(ary);
}
else {
xfree(ARY_HEAP_PTR(ary));
}
ARY_SET_PTR(ary, RARRAY_PTR(tmp));
ARY_SET_HEAP_LEN(ary, len);
ARY_SET_CAPA(ary, RARRAY_LEN(tmp));
}
FL_UNSET(tmp, FL_FREEZE);
FL_SET_EMBED(tmp);
ARY_SET_EMBED_LEN(tmp, 0);
FL_SET(tmp, FL_FREEZE);
}
RBASIC(tmp)->klass = rb_cArray;
}
return ary;
}
VALUE
rb_ary_sort(VALUE ary)
{
ary = rb_ary_dup(ary);
rb_ary_sort_bang(ary);
return ary;
}
static VALUE
rb_ary_bsearch(VALUE ary)
{
long low = 0, high = RARRAY_LEN(ary), mid;
int smaller = 0, satisfied = 0;
VALUE v, val;
RETURN_ENUMERATOR(ary, 0, 0);
while (low < high) {
mid = low + ((high - low) / 2);
val = rb_ary_entry(ary, mid);
v = rb_yield(val);
if (FIXNUM_P(v)) {
if (FIX2INT(v) == 0) return val;
smaller = FIX2INT(v) < 0;
}
else if (v == Qtrue) {
satisfied = 1;
smaller = 1;
}
else if (v == Qfalse || v == Qnil) {
smaller = 0;
}
else if (rb_obj_is_kind_of(v, rb_cNumeric)) {
switch (rb_cmpint(rb_funcall(v, id_cmp, 1, INT2FIX(0)), v, INT2FIX(0))) {
case 0: return val;
case 1: smaller = 1; break;
case -1: smaller = 0;
}
}
else {
rb_raise(rb_eTypeError, "wrong argument type %s"
" (must be numeric, true, false or nil)",
rb_obj_classname(v));
}
if (smaller) {
high = mid;
}
else {
low = mid + 1;
}
}
if (low == RARRAY_LEN(ary)) return Qnil;
if (!satisfied) return Qnil;
return rb_ary_entry(ary, low);
}
static VALUE
sort_by_i(VALUE i)
{
return rb_yield(i);
}
static VALUE
rb_ary_sort_by_bang(VALUE ary)
{
VALUE sorted;
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
rb_ary_modify(ary);
sorted = rb_block_call(ary, rb_intern("sort_by"), 0, 0, sort_by_i, 0);
rb_ary_replace(ary, sorted);
return ary;
}
static VALUE
rb_ary_collect(VALUE ary)
{
long i;
VALUE collect;
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
collect = rb_ary_new2(RARRAY_LEN(ary));
for (i = 0; i < RARRAY_LEN(ary); i++) {
rb_ary_push(collect, rb_yield(RARRAY_PTR(ary)[i]));
}
return collect;
}
static VALUE
rb_ary_collect_bang(VALUE ary)
{
long i;
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
rb_ary_modify(ary);
for (i = 0; i < RARRAY_LEN(ary); i++) {
rb_ary_store(ary, i, rb_yield(RARRAY_PTR(ary)[i]));
}
return ary;
}
VALUE
rb_get_values_at(VALUE obj, long olen, int argc, VALUE *argv, VALUE (*func) (VALUE, long))
{
VALUE result = rb_ary_new2(argc);
long beg, len, i, j;
for (i=0; i<argc; i++) {
if (FIXNUM_P(argv[i])) {
rb_ary_push(result, (*func)(obj, FIX2LONG(argv[i])));
continue;
}
if (rb_range_beg_len(argv[i], &beg, &len, olen, 1)) {
long end = olen < beg+len ? olen : beg+len;
for (j = beg; j < end; j++) {
rb_ary_push(result, (*func)(obj, j));
}
if (beg + len > j)
rb_ary_resize(result, RARRAY_LEN(result) + (beg + len) - j);
continue;
}
rb_ary_push(result, (*func)(obj, NUM2LONG(argv[i])));
}
return result;
}
static VALUE
rb_ary_values_at(int argc, VALUE *argv, VALUE ary)
{
return rb_get_values_at(ary, RARRAY_LEN(ary), argc, argv, rb_ary_entry);
}
static VALUE
rb_ary_select(VALUE ary)
{
VALUE result;
long i;
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
result = rb_ary_new2(RARRAY_LEN(ary));
for (i = 0; i < RARRAY_LEN(ary); i++) {
if (RTEST(rb_yield(RARRAY_PTR(ary)[i]))) {
rb_ary_push(result, rb_ary_elt(ary, i));
}
}
return result;
}
static VALUE
rb_ary_select_bang(VALUE ary)
{
long i1, i2;
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
rb_ary_modify(ary);
for (i1 = i2 = 0; i1 < RARRAY_LEN(ary); i1++) {
VALUE v = RARRAY_PTR(ary)[i1];
if (!RTEST(rb_yield(v))) continue;
if (i1 != i2) {
rb_ary_store(ary, i2, v);
}
i2++;
}
if (RARRAY_LEN(ary) == i2) return Qnil;
if (i2 < RARRAY_LEN(ary))
ARY_SET_LEN(ary, i2);
return ary;
}
static VALUE
rb_ary_keep_if(VALUE ary)
{
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
rb_ary_select_bang(ary);
return ary;
}
static void
ary_resize_smaller(VALUE ary, long len)
{
rb_ary_modify(ary);
if (RARRAY_LEN(ary) > len) {
ARY_SET_LEN(ary, len);
if (len * 2 < ARY_CAPA(ary) &&
ARY_CAPA(ary) > ARY_DEFAULT_SIZE) {
ary_resize_capa(ary, len * 2);
}
}
}
VALUE
rb_ary_delete(VALUE ary, VALUE item)
{
VALUE v = item;
long i1, i2;
for (i1 = i2 = 0; i1 < RARRAY_LEN(ary); i1++) {
VALUE e = RARRAY_PTR(ary)[i1];
if (rb_equal(e, item)) {
v = e;
continue;
}
if (i1 != i2) {
rb_ary_store(ary, i2, e);
}
i2++;
}
if (RARRAY_LEN(ary) == i2) {
if (rb_block_given_p()) {
return rb_yield(item);
}
return Qnil;
}
ary_resize_smaller(ary, i2);
return v;
}
void
rb_ary_delete_same(VALUE ary, VALUE item)
{
long i1, i2;
for (i1 = i2 = 0; i1 < RARRAY_LEN(ary); i1++) {
VALUE e = RARRAY_PTR(ary)[i1];
if (e == item) {
continue;
}
if (i1 != i2) {
rb_ary_store(ary, i2, e);
}
i2++;
}
if (RARRAY_LEN(ary) == i2) {
return;
}
ary_resize_smaller(ary, i2);
}
VALUE
rb_ary_delete_at(VALUE ary, long pos)
{
long len = RARRAY_LEN(ary);
VALUE del;
if (pos >= len) return Qnil;
if (pos < 0) {
pos += len;
if (pos < 0) return Qnil;
}
rb_ary_modify(ary);
del = RARRAY_PTR(ary)[pos];
MEMMOVE(RARRAY_PTR(ary)+pos, RARRAY_PTR(ary)+pos+1, VALUE,
RARRAY_LEN(ary)-pos-1);
ARY_INCREASE_LEN(ary, -1);
return del;
}
static VALUE
rb_ary_delete_at_m(VALUE ary, VALUE pos)
{
return rb_ary_delete_at(ary, NUM2LONG(pos));
}
static VALUE
rb_ary_slice_bang(int argc, VALUE *argv, VALUE ary)
{
VALUE arg1, arg2;
long pos, len, orig_len;
rb_ary_modify_check(ary);
if (argc == 2) {
pos = NUM2LONG(argv[0]);
len = NUM2LONG(argv[1]);
delete_pos_len:
if (len < 0) return Qnil;
orig_len = RARRAY_LEN(ary);
if (pos < 0) {
pos += orig_len;
if (pos < 0) return Qnil;
}
else if (orig_len < pos) return Qnil;
if (orig_len < pos + len) {
len = orig_len - pos;
}
if (len == 0) return rb_ary_new2(0);
arg2 = rb_ary_new4(len, RARRAY_PTR(ary)+pos);
RBASIC(arg2)->klass = rb_obj_class(ary);
rb_ary_splice(ary, pos, len, Qundef);
return arg2;
}
if (argc != 1) {
rb_scan_args(argc, argv, "11", NULL, NULL);
}
arg1 = argv[0];
if (!FIXNUM_P(arg1)) {
switch (rb_range_beg_len(arg1, &pos, &len, RARRAY_LEN(ary), 0)) {
case Qtrue:
goto delete_pos_len;
case Qnil:
return Qnil;
default:
break;
}
}
return rb_ary_delete_at(ary, NUM2LONG(arg1));
}
static VALUE
ary_reject(VALUE orig, VALUE result)
{
long i;
for (i = 0; i < RARRAY_LEN(orig); i++) {
VALUE v = RARRAY_PTR(orig)[i];
if (!RTEST(rb_yield(v))) {
rb_ary_push(result, v);
}
}
return result;
}
static VALUE
ary_reject_bang(VALUE ary)
{
long i;
VALUE result = Qnil;
rb_ary_modify_check(ary);
for (i = 0; i < RARRAY_LEN(ary); ) {
VALUE v = RARRAY_PTR(ary)[i];
if (RTEST(rb_yield(v))) {
rb_ary_delete_at(ary, i);
result = ary;
}
else {
i++;
}
}
return result;
}
static VALUE
rb_ary_reject_bang(VALUE ary)
{
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
return ary_reject_bang(ary);
}
static VALUE
rb_ary_reject(VALUE ary)
{
VALUE rejected_ary;
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
rejected_ary = rb_ary_new();
ary_reject(ary, rejected_ary);
return rejected_ary;
}
static VALUE
rb_ary_delete_if(VALUE ary)
{
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
ary_reject_bang(ary);
return ary;
}
static VALUE
take_i(VALUE val, VALUE *args, int argc, VALUE *argv)
{
if (args[1]-- == 0) rb_iter_break();
if (argc > 1) val = rb_ary_new4(argc, argv);
rb_ary_push(args[0], val);
return Qnil;
}
static VALUE
take_items(VALUE obj, long n)
{
VALUE result = rb_check_array_type(obj);
VALUE args[2];
if (!NIL_P(result)) return rb_ary_subseq(result, 0, n);
result = rb_ary_new2(n);
args[0] = result; args[1] = (VALUE)n;
if (rb_check_block_call(obj, idEach, 0, 0, take_i, (VALUE)args) == Qundef)
rb_raise(rb_eTypeError, "wrong argument type %s (must respond to :each)",
rb_obj_classname(obj));
return result;
}
static VALUE
rb_ary_zip(int argc, VALUE *argv, VALUE ary)
{
int i, j;
long len;
VALUE result = Qnil;
len = RARRAY_LEN(ary);
for (i=0; i<argc; i++) {
argv[i] = take_items(argv[i], len);
}
if (!rb_block_given_p()) {
result = rb_ary_new2(len);
}
for (i=0; i<RARRAY_LEN(ary); i++) {
VALUE tmp = rb_ary_new2(argc+1);
rb_ary_push(tmp, rb_ary_elt(ary, i));
for (j=0; j<argc; j++) {
rb_ary_push(tmp, rb_ary_elt(argv[j], i));
}
if (NIL_P(result)) {
rb_yield(tmp);
}
else {
rb_ary_push(result, tmp);
}
}
return result;
}
static VALUE
rb_ary_transpose(VALUE ary)
{
long elen = -1, alen, i, j;
VALUE tmp, result = 0;
alen = RARRAY_LEN(ary);
if (alen == 0) return rb_ary_dup(ary);
for (i=0; i<alen; i++) {
tmp = to_ary(rb_ary_elt(ary, i));
if (elen < 0) {
elen = RARRAY_LEN(tmp);
result = rb_ary_new2(elen);
for (j=0; j<elen; j++) {
rb_ary_store(result, j, rb_ary_new2(alen));
}
}
else if (elen != RARRAY_LEN(tmp)) {
rb_raise(rb_eIndexError, "element size differs (%ld should be %ld)",
RARRAY_LEN(tmp), elen);
}
for (j=0; j<elen; j++) {
rb_ary_store(rb_ary_elt(result, j), i, rb_ary_elt(tmp, j));
}
}
return result;
}
VALUE
rb_ary_replace(VALUE copy, VALUE orig)
{
rb_ary_modify_check(copy);
orig = to_ary(orig);
if (copy == orig) return copy;
if (RARRAY_LEN(orig) <= RARRAY_EMBED_LEN_MAX) {
VALUE *ptr;
VALUE shared = 0;
if (ARY_OWNS_HEAP_P(copy)) {
xfree(RARRAY_PTR(copy));
}
else if (ARY_SHARED_P(copy)) {
shared = ARY_SHARED(copy);
FL_UNSET_SHARED(copy);
}
FL_SET_EMBED(copy);
ptr = RARRAY_PTR(orig);
MEMCPY(RARRAY_PTR(copy), ptr, VALUE, RARRAY_LEN(orig));
if (shared) {
rb_ary_decrement_share(shared);
}
ARY_SET_LEN(copy, RARRAY_LEN(orig));
}
else {
VALUE shared = ary_make_shared(orig);
if (ARY_OWNS_HEAP_P(copy)) {
xfree(RARRAY_PTR(copy));
}
else {
rb_ary_unshare_safe(copy);
}
FL_UNSET_EMBED(copy);
ARY_SET_PTR(copy, RARRAY_PTR(orig));
ARY_SET_LEN(copy, RARRAY_LEN(orig));
rb_ary_set_shared(copy, shared);
}
return copy;
}
VALUE
rb_ary_clear(VALUE ary)
{
rb_ary_modify_check(ary);
ARY_SET_LEN(ary, 0);
if (ARY_SHARED_P(ary)) {
if (!ARY_EMBED_P(ary)) {
rb_ary_unshare(ary);
FL_SET_EMBED(ary);
}
}
else if (ARY_DEFAULT_SIZE * 2 < ARY_CAPA(ary)) {
ary_resize_capa(ary, ARY_DEFAULT_SIZE * 2);
}
return ary;
}
static VALUE
rb_ary_fill(int argc, VALUE *argv, VALUE ary)
{
VALUE item, arg1, arg2;
long beg = 0, end = 0, len = 0;
VALUE *p, *pend;
int block_p = FALSE;
if (rb_block_given_p()) {
block_p = TRUE;
rb_scan_args(argc, argv, "02", &arg1, &arg2);
argc += 1;
}
else {
rb_scan_args(argc, argv, "12", &item, &arg1, &arg2);
}
switch (argc) {
case 1:
beg = 0;
len = RARRAY_LEN(ary);
break;
case 2:
if (rb_range_beg_len(arg1, &beg, &len, RARRAY_LEN(ary), 1)) {
break;
}
case 3:
beg = NIL_P(arg1) ? 0 : NUM2LONG(arg1);
if (beg < 0) {
beg = RARRAY_LEN(ary) + beg;
if (beg < 0) beg = 0;
}
len = NIL_P(arg2) ? RARRAY_LEN(ary) - beg : NUM2LONG(arg2);
break;
}
rb_ary_modify(ary);
if (len < 0) {
return ary;
}
if (beg >= ARY_MAX_SIZE || len > ARY_MAX_SIZE - beg) {
rb_raise(rb_eArgError, "argument too big");
}
end = beg + len;
if (RARRAY_LEN(ary) < end) {
if (end >= ARY_CAPA(ary)) {
ary_resize_capa(ary, end);
}
rb_mem_clear(RARRAY_PTR(ary) + RARRAY_LEN(ary), end - RARRAY_LEN(ary));
ARY_SET_LEN(ary, end);
}
if (block_p) {
VALUE v;
long i;
for (i=beg; i<end; i++) {
v = rb_yield(LONG2NUM(i));
if (i>=RARRAY_LEN(ary)) break;
RARRAY_PTR(ary)[i] = v;
}
}
else {
p = RARRAY_PTR(ary) + beg;
pend = p + len;
while (p < pend) {
*p++ = item;
}
}
return ary;
}
VALUE
rb_ary_plus(VALUE x, VALUE y)
{
VALUE z;
long len;
y = to_ary(y);
len = RARRAY_LEN(x) + RARRAY_LEN(y);
z = rb_ary_new2(len);
MEMCPY(RARRAY_PTR(z), RARRAY_PTR(x), VALUE, RARRAY_LEN(x));
MEMCPY(RARRAY_PTR(z) + RARRAY_LEN(x), RARRAY_PTR(y), VALUE, RARRAY_LEN(y));
ARY_SET_LEN(z, len);
return z;
}
VALUE
rb_ary_concat(VALUE x, VALUE y)
{
rb_ary_modify_check(x);
y = to_ary(y);
if (RARRAY_LEN(y) > 0) {
rb_ary_splice(x, RARRAY_LEN(x), 0, y);
}
return x;
}
static VALUE
rb_ary_times(VALUE ary, VALUE times)
{
VALUE ary2, tmp, *ptr, *ptr2;
long t, len;
tmp = rb_check_string_type(times);
if (!NIL_P(tmp)) {
return rb_ary_join(ary, tmp);
}
len = NUM2LONG(times);
if (len == 0) {
ary2 = ary_new(rb_obj_class(ary), 0);
goto out;
}
if (len < 0) {
rb_raise(rb_eArgError, "negative argument");
}
if (ARY_MAX_SIZE/len < RARRAY_LEN(ary)) {
rb_raise(rb_eArgError, "argument too big");
}
len *= RARRAY_LEN(ary);
ary2 = ary_new(rb_obj_class(ary), len);
ARY_SET_LEN(ary2, len);
ptr = RARRAY_PTR(ary);
ptr2 = RARRAY_PTR(ary2);
t = RARRAY_LEN(ary);
if (0 < t) {
MEMCPY(ptr2, ptr, VALUE, t);
while (t <= len/2) {
MEMCPY(ptr2+t, ptr2, VALUE, t);
t *= 2;
}
if (t < len) {
MEMCPY(ptr2+t, ptr2, VALUE, len-t);
}
}
out:
OBJ_INFECT(ary2, ary);
return ary2;
}
VALUE
rb_ary_assoc(VALUE ary, VALUE key)
{
long i;
VALUE v;
for (i = 0; i < RARRAY_LEN(ary); ++i) {
v = rb_check_array_type(RARRAY_PTR(ary)[i]);
if (!NIL_P(v) && RARRAY_LEN(v) > 0 &&
rb_equal(RARRAY_PTR(v)[0], key))
return v;
}
return Qnil;
}
VALUE
rb_ary_rassoc(VALUE ary, VALUE value)
{
long i;
VALUE v;
for (i = 0; i < RARRAY_LEN(ary); ++i) {
v = RARRAY_PTR(ary)[i];
if (RB_TYPE_P(v, T_ARRAY) &&
RARRAY_LEN(v) > 1 &&
rb_equal(RARRAY_PTR(v)[1], value))
return v;
}
return Qnil;
}
static VALUE
recursive_equal(VALUE ary1, VALUE ary2, int recur)
{
long i, len1;
VALUE *p1, *p2;
if (recur) return Qtrue;
p1 = RARRAY_PTR(ary1);
p2 = RARRAY_PTR(ary2);
len1 = RARRAY_LEN(ary1);
for (i = 0; i < len1; i++) {
if (*p1 != *p2) {
if (rb_equal(*p1, *p2)) {
len1 = RARRAY_LEN(ary1);
if (len1 != RARRAY_LEN(ary2))
return Qfalse;
if (len1 < i)
return Qtrue;
p1 = RARRAY_PTR(ary1) + i;
p2 = RARRAY_PTR(ary2) + i;
}
else {
return Qfalse;
}
}
p1++;
p2++;
}
return Qtrue;
}
static VALUE
rb_ary_equal(VALUE ary1, VALUE ary2)
{
if (ary1 == ary2) return Qtrue;
if (!RB_TYPE_P(ary2, T_ARRAY)) {
if (!rb_respond_to(ary2, rb_intern("to_ary"))) {
return Qfalse;
}
return rb_equal(ary2, ary1);
}
if (RARRAY_LEN(ary1) != RARRAY_LEN(ary2)) return Qfalse;
return rb_exec_recursive_paired(recursive_equal, ary1, ary2, ary2);
}
static VALUE
recursive_eql(VALUE ary1, VALUE ary2, int recur)
{
long i;
if (recur) return Qtrue;
for (i=0; i<RARRAY_LEN(ary1); i++) {
if (!rb_eql(rb_ary_elt(ary1, i), rb_ary_elt(ary2, i)))
return Qfalse;
}
return Qtrue;
}
static VALUE
rb_ary_eql(VALUE ary1, VALUE ary2)
{
if (ary1 == ary2) return Qtrue;
if (!RB_TYPE_P(ary2, T_ARRAY)) return Qfalse;
if (RARRAY_LEN(ary1) != RARRAY_LEN(ary2)) return Qfalse;
return rb_exec_recursive_paired(recursive_eql, ary1, ary2, ary2);
}
static VALUE
recursive_hash(VALUE ary, VALUE dummy, int recur)
{
long i;
st_index_t h;
VALUE n;
h = rb_hash_start(RARRAY_LEN(ary));
if (recur) {
h = rb_hash_uint(h, NUM2LONG(rb_hash(rb_cArray)));
}
else {
for (i=0; i<RARRAY_LEN(ary); i++) {
n = rb_hash(RARRAY_PTR(ary)[i]);
h = rb_hash_uint(h, NUM2LONG(n));
}
}
h = rb_hash_end(h);
return LONG2FIX(h);
}
static VALUE
rb_ary_hash(VALUE ary)
{
return rb_exec_recursive_outer(recursive_hash, ary, 0);
}
VALUE
rb_ary_includes(VALUE ary, VALUE item)
{
long i;
for (i=0; i<RARRAY_LEN(ary); i++) {
if (rb_equal(RARRAY_PTR(ary)[i], item)) {
return Qtrue;
}
}
return Qfalse;
}
static VALUE
recursive_cmp(VALUE ary1, VALUE ary2, int recur)
{
long i, len;
if (recur) return Qundef;
len = RARRAY_LEN(ary1);
if (len > RARRAY_LEN(ary2)) {
len = RARRAY_LEN(ary2);
}
for (i=0; i<len; i++) {
VALUE v = rb_funcall(rb_ary_elt(ary1, i), id_cmp, 1, rb_ary_elt(ary2, i));
if (v != INT2FIX(0)) {
return v;
}
}
return Qundef;
}
VALUE
rb_ary_cmp(VALUE ary1, VALUE ary2)
{
long len;
VALUE v;
ary2 = rb_check_array_type(ary2);
if (NIL_P(ary2)) return Qnil;
if (ary1 == ary2) return INT2FIX(0);
v = rb_exec_recursive_paired(recursive_cmp, ary1, ary2, ary2);
if (v != Qundef) return v;
len = RARRAY_LEN(ary1) - RARRAY_LEN(ary2);
if (len == 0) return INT2FIX(0);
if (len > 0) return INT2FIX(1);
return INT2FIX(-1);
}
static VALUE
ary_add_hash(VALUE hash, VALUE ary)
{
long i;
for (i=0; i<RARRAY_LEN(ary); i++) {
rb_hash_aset(hash, RARRAY_PTR(ary)[i], Qtrue);
}
return hash;
}
static inline VALUE
ary_tmp_hash_new(void)
{
VALUE hash = rb_hash_new();
RBASIC(hash)->klass = 0;
return hash;
}
static VALUE
ary_make_hash(VALUE ary)
{
VALUE hash = ary_tmp_hash_new();
return ary_add_hash(hash, ary);
}
static VALUE
ary_add_hash_by(VALUE hash, VALUE ary)
{
long i;
for (i = 0; i < RARRAY_LEN(ary); ++i) {
VALUE v = rb_ary_elt(ary, i), k = rb_yield(v);
if (rb_hash_lookup2(hash, k, Qundef) == Qundef) {
rb_hash_aset(hash, k, v);
}
}
return hash;
}
static VALUE
ary_make_hash_by(VALUE ary)
{
VALUE hash = ary_tmp_hash_new();
return ary_add_hash_by(hash, ary);
}
static inline void
ary_recycle_hash(VALUE hash)
{
if (RHASH(hash)->ntbl) {
st_table *tbl = RHASH(hash)->ntbl;
RHASH(hash)->ntbl = 0;
st_free_table(tbl);
}
RB_GC_GUARD(hash);
}
static VALUE
rb_ary_diff(VALUE ary1, VALUE ary2)
{
VALUE ary3;
VALUE hash;
long i;
hash = ary_make_hash(to_ary(ary2));
ary3 = rb_ary_new();
for (i=0; i<RARRAY_LEN(ary1); i++) {
if (st_lookup(RHASH_TBL(hash), RARRAY_PTR(ary1)[i], 0)) continue;
rb_ary_push(ary3, rb_ary_elt(ary1, i));
}
ary_recycle_hash(hash);
return ary3;
}
static VALUE
rb_ary_and(VALUE ary1, VALUE ary2)
{
VALUE hash, ary3, v;
st_data_t vv;
long i;
ary2 = to_ary(ary2);
ary3 = rb_ary_new2(RARRAY_LEN(ary1) < RARRAY_LEN(ary2) ?
RARRAY_LEN(ary1) : RARRAY_LEN(ary2));
hash = ary_make_hash(ary2);
if (RHASH_EMPTY_P(hash))
return ary3;
for (i=0; i<RARRAY_LEN(ary1); i++) {
vv = (st_data_t)(v = rb_ary_elt(ary1, i));
if (st_delete(RHASH_TBL(hash), &vv, 0)) {
rb_ary_push(ary3, v);
}
}
ary_recycle_hash(hash);
return ary3;
}
static VALUE
rb_ary_or(VALUE ary1, VALUE ary2)
{
VALUE hash, ary3, v;
st_data_t vv;
long i;
ary2 = to_ary(ary2);
ary3 = rb_ary_new2(RARRAY_LEN(ary1)+RARRAY_LEN(ary2));
hash = ary_add_hash(ary_make_hash(ary1), ary2);
for (i=0; i<RARRAY_LEN(ary1); i++) {
vv = (st_data_t)(v = rb_ary_elt(ary1, i));
if (st_delete(RHASH_TBL(hash), &vv, 0)) {
rb_ary_push(ary3, v);
}
}
for (i=0; i<RARRAY_LEN(ary2); i++) {
vv = (st_data_t)(v = rb_ary_elt(ary2, i));
if (st_delete(RHASH_TBL(hash), &vv, 0)) {
rb_ary_push(ary3, v);
}
}
ary_recycle_hash(hash);
return ary3;
}
static int
push_value(st_data_t key, st_data_t val, st_data_t ary)
{
rb_ary_push((VALUE)ary, (VALUE)val);
return ST_CONTINUE;
}
static VALUE
rb_ary_uniq_bang(VALUE ary)
{
VALUE hash, v;
long i, j;
rb_ary_modify_check(ary);
if (RARRAY_LEN(ary) <= 1)
return Qnil;
if (rb_block_given_p()) {
hash = ary_make_hash_by(ary);
if (RARRAY_LEN(ary) == (i = RHASH_SIZE(hash))) {
return Qnil;
}
ARY_SET_LEN(ary, 0);
if (ARY_SHARED_P(ary) && !ARY_EMBED_P(ary)) {
rb_ary_unshare(ary);
FL_SET_EMBED(ary);
}
ary_resize_capa(ary, i);
st_foreach(RHASH_TBL(hash), push_value, ary);
}
else {
hash = ary_make_hash(ary);
if (RARRAY_LEN(ary) == (long)RHASH_SIZE(hash)) {
return Qnil;
}
for (i=j=0; i<RARRAY_LEN(ary); i++) {
st_data_t vv = (st_data_t)(v = rb_ary_elt(ary, i));
if (st_delete(RHASH_TBL(hash), &vv, 0)) {
rb_ary_store(ary, j++, v);
}
}
ARY_SET_LEN(ary, j);
}
ary_recycle_hash(hash);
return ary;
}
static VALUE
rb_ary_uniq(VALUE ary)
{
VALUE hash, uniq, v;
long i;
if (RARRAY_LEN(ary) <= 1)
return rb_ary_dup(ary);
if (rb_block_given_p()) {
hash = ary_make_hash_by(ary);
uniq = ary_new(rb_obj_class(ary), RHASH_SIZE(hash));
st_foreach(RHASH_TBL(hash), push_value, uniq);
}
else {
hash = ary_make_hash(ary);
uniq = ary_new(rb_obj_class(ary), RHASH_SIZE(hash));
for (i=0; i<RARRAY_LEN(ary); i++) {
st_data_t vv = (st_data_t)(v = rb_ary_elt(ary, i));
if (st_delete(RHASH_TBL(hash), &vv, 0)) {
rb_ary_push(uniq, v);
}
}
}
ary_recycle_hash(hash);
return uniq;
}
static VALUE
rb_ary_compact_bang(VALUE ary)
{
VALUE *p, *t, *end;
long n;
rb_ary_modify(ary);
p = t = RARRAY_PTR(ary);
end = p + RARRAY_LEN(ary);
while (t < end) {
if (NIL_P(*t)) t++;
else *p++ = *t++;
}
n = p - RARRAY_PTR(ary);
if (RARRAY_LEN(ary) == n) {
return Qnil;
}
ARY_SET_LEN(ary, n);
if (n * 2 < ARY_CAPA(ary) && ARY_DEFAULT_SIZE * 2 < ARY_CAPA(ary)) {
ary_resize_capa(ary, n * 2);
}
return ary;
}
static VALUE
rb_ary_compact(VALUE ary)
{
ary = rb_ary_dup(ary);
rb_ary_compact_bang(ary);
return ary;
}
static VALUE
rb_ary_count(int argc, VALUE *argv, VALUE ary)
{
long i, n = 0;
if (argc == 0) {
VALUE v;
if (!rb_block_given_p())
return LONG2NUM(RARRAY_LEN(ary));
for (i = 0; i < RARRAY_LEN(ary); i++) {
v = RARRAY_PTR(ary)[i];
if (RTEST(rb_yield(v))) n++;
}
}
else {
VALUE obj;
rb_scan_args(argc, argv, "1", &obj);
if (rb_block_given_p()) {
rb_warn("given block not used");
}
for (i = 0; i < RARRAY_LEN(ary); i++) {
if (rb_equal(RARRAY_PTR(ary)[i], obj)) n++;
}
}
return LONG2NUM(n);
}
static VALUE
flatten(VALUE ary, int level, int *modified)
{
long i = 0;
VALUE stack, result, tmp, elt;
st_table *memo;
st_data_t id;
stack = ary_new(0, ARY_DEFAULT_SIZE);
result = ary_new(0, RARRAY_LEN(ary));
memo = st_init_numtable();
st_insert(memo, (st_data_t)ary, (st_data_t)Qtrue);
*modified = 0;
while (1) {
while (i < RARRAY_LEN(ary)) {
elt = RARRAY_PTR(ary)[i++];
tmp = rb_check_array_type(elt);
if (RBASIC(result)->klass) {
rb_raise(rb_eRuntimeError, "flatten reentered");
}
if (NIL_P(tmp) || (level >= 0 && RARRAY_LEN(stack) / 2 >= level)) {
rb_ary_push(result, elt);
}
else {
*modified = 1;
id = (st_data_t)tmp;
if (st_lookup(memo, id, 0)) {
st_free_table(memo);
rb_raise(rb_eArgError, "tried to flatten recursive array");
}
st_insert(memo, id, (st_data_t)Qtrue);
rb_ary_push(stack, ary);
rb_ary_push(stack, LONG2NUM(i));
ary = tmp;
i = 0;
}
}
if (RARRAY_LEN(stack) == 0) {
break;
}
id = (st_data_t)ary;
st_delete(memo, &id, 0);
tmp = rb_ary_pop(stack);
i = NUM2LONG(tmp);
ary = rb_ary_pop(stack);
}
st_free_table(memo);
RBASIC(result)->klass = rb_class_of(ary);
return result;
}
static VALUE
rb_ary_flatten_bang(int argc, VALUE *argv, VALUE ary)
{
int mod = 0, level = -1;
VALUE result, lv;
rb_scan_args(argc, argv, "01", &lv);
rb_ary_modify_check(ary);
if (!NIL_P(lv)) level = NUM2INT(lv);
if (level == 0) return Qnil;
result = flatten(ary, level, &mod);
if (mod == 0) {
ary_discard(result);
return Qnil;
}
if (!(mod = ARY_EMBED_P(result))) rb_obj_freeze(result);
rb_ary_replace(ary, result);
if (mod) ARY_SET_EMBED_LEN(result, 0);
return ary;
}
static VALUE
rb_ary_flatten(int argc, VALUE *argv, VALUE ary)
{
int mod = 0, level = -1;
VALUE result, lv;
rb_scan_args(argc, argv, "01", &lv);
if (!NIL_P(lv)) level = NUM2INT(lv);
if (level == 0) return ary_make_shared_copy(ary);
result = flatten(ary, level, &mod);
OBJ_INFECT(result, ary);
return result;
}
#define OPTHASH_GIVEN_P(opts) \
(argc > 0 && !NIL_P((opts) = rb_check_hash_type(argv[argc-1])) && (--argc, 1))
static VALUE sym_random;
#define RAND_UPTO(max) (long)rb_random_ulong_limited((randgen), (max)-1)
static VALUE
rb_ary_shuffle_bang(int argc, VALUE *argv, VALUE ary)
{
VALUE *ptr, opts, *snap_ptr, randgen = rb_cRandom;
long i, snap_len;
if (OPTHASH_GIVEN_P(opts)) {
randgen = rb_hash_lookup2(opts, sym_random, randgen);
}
rb_check_arity(argc, 0, 0);
rb_ary_modify(ary);
i = RARRAY_LEN(ary);
ptr = RARRAY_PTR(ary);
snap_len = i;
snap_ptr = ptr;
while (i) {
long j = RAND_UPTO(i);
VALUE tmp;
if (snap_len != RARRAY_LEN(ary) || snap_ptr != RARRAY_PTR(ary)) {
rb_raise(rb_eRuntimeError, "modified during shuffle");
}
tmp = ptr[--i];
ptr[i] = ptr[j];
ptr[j] = tmp;
}
return ary;
}
static VALUE
rb_ary_shuffle(int argc, VALUE *argv, VALUE ary)
{
ary = rb_ary_dup(ary);
rb_ary_shuffle_bang(argc, argv, ary);
return ary;
}
static VALUE
rb_ary_sample(int argc, VALUE *argv, VALUE ary)
{
VALUE nv, result, *ptr;
VALUE opts, randgen = rb_cRandom;
long n, len, i, j, k, idx[10];
long rnds[numberof(idx)];
if (OPTHASH_GIVEN_P(opts)) {
randgen = rb_hash_lookup2(opts, sym_random, randgen);
}
ptr = RARRAY_PTR(ary);
len = RARRAY_LEN(ary);
if (argc == 0) {
if (len == 0) return Qnil;
if (len == 1) {
i = 0;
}
else {
i = RAND_UPTO(len);
if ((len = RARRAY_LEN(ary)) <= i) return Qnil;
ptr = RARRAY_PTR(ary);
}
return ptr[i];
}
rb_scan_args(argc, argv, "1", &nv);
n = NUM2LONG(nv);
if (n < 0) rb_raise(rb_eArgError, "negative sample number");
if (n > len) n = len;
if (n <= numberof(idx)) {
for (i = 0; i < n; ++i) {
rnds[i] = RAND_UPTO(len - i);
}
}
k = len;
len = RARRAY_LEN(ary);
ptr = RARRAY_PTR(ary);
if (len < k) {
if (n <= numberof(idx)) {
for (i = 0; i < n; ++i) {
if (rnds[i] >= len) {
return rb_ary_new2(0);
}
}
}
}
if (n > len) n = len;
switch (n) {
case 0:
return rb_ary_new2(0);
case 1:
i = rnds[0];
return rb_ary_new4(1, &ptr[i]);
case 2:
i = rnds[0];
j = rnds[1];
if (j >= i) j++;
return rb_ary_new3(2, ptr[i], ptr[j]);
case 3:
i = rnds[0];
j = rnds[1];
k = rnds[2];
{
long l = j, g = i;
if (j >= i) l = i, g = ++j;
if (k >= l && (++k >= g)) ++k;
}
return rb_ary_new3(3, ptr[i], ptr[j], ptr[k]);
}
if (n <= numberof(idx)) {
VALUE *ptr_result;
long sorted[numberof(idx)];
sorted[0] = idx[0] = rnds[0];
for (i=1; i<n; i++) {
k = rnds[i];
for (j = 0; j < i; ++j) {
if (k < sorted[j]) break;
++k;
}
memmove(&sorted[j+1], &sorted[j], sizeof(sorted[0])*(i-j));
sorted[j] = idx[i] = k;
}
result = rb_ary_new2(n);
ptr_result = RARRAY_PTR(result);
for (i=0; i<n; i++) {
ptr_result[i] = ptr[idx[i]];
}
}
else {
VALUE *ptr_result;
result = rb_ary_new4(len, ptr);
RBASIC(result)->klass = 0;
ptr_result = RARRAY_PTR(result);
RB_GC_GUARD(ary);
for (i=0; i<n; i++) {
j = RAND_UPTO(len-i) + i;
nv = ptr_result[j];
ptr_result[j] = ptr_result[i];
ptr_result[i] = nv;
}
RBASIC(result)->klass = rb_cArray;
}
ARY_SET_LEN(result, n);
return result;
}
static VALUE
rb_ary_cycle_size(VALUE self, VALUE args)
{
long mul;
VALUE n = Qnil;
if (args && (RARRAY_LEN(args) > 0)) {
n = RARRAY_PTR(args)[0];
}
if (RARRAY_LEN(self) == 0) return INT2FIX(0);
if (n == Qnil) return DBL2NUM(INFINITY);
mul = NUM2LONG(n);
if (mul <= 0) return INT2FIX(0);
return rb_funcall(rb_ary_length(self), '*', 1, LONG2FIX(mul));
}
static VALUE
rb_ary_cycle(int argc, VALUE *argv, VALUE ary)
{
long n, i;
VALUE nv = Qnil;
rb_scan_args(argc, argv, "01", &nv);
RETURN_SIZED_ENUMERATOR(ary, argc, argv, rb_ary_cycle_size);
if (NIL_P(nv)) {
n = -1;
}
else {
n = NUM2LONG(nv);
if (n <= 0) return Qnil;
}
while (RARRAY_LEN(ary) > 0 && (n < 0 || 0 < n--)) {
for (i=0; i<RARRAY_LEN(ary); i++) {
rb_yield(RARRAY_PTR(ary)[i]);
}
}
return Qnil;
}
#define tmpbuf(n, size) rb_str_tmp_new((n)*(size))
#define tmpbuf_discard(s) (rb_str_resize((s), 0L), RBASIC(s)->klass = rb_cString)
#define tmpary(n) rb_ary_tmp_new(n)
#define tmpary_discard(a) (ary_discard(a), RBASIC(a)->klass = rb_cArray)
static int
yield_indexed_values(const VALUE values, const long r, const long *const p)
{
const VALUE result = rb_ary_new2(r);
VALUE *const result_array = RARRAY_PTR(result);
const VALUE *const values_array = RARRAY_PTR(values);
long i;
for (i = 0; i < r; i++) result_array[i] = values_array[p[i]];
ARY_SET_LEN(result, r);
rb_yield(result);
return !RBASIC(values)->klass;
}
static void
permute0(long n, long r, long *p, long index, char *used, VALUE values)
{
long i;
for (i = 0; i < n; i++) {
if (used[i] == 0) {
p[index] = i;
if (index < r-1) {
used[i] = 1;
permute0(n, r, p, index+1,
used, values);
used[i] = 0;
}
else {
if (!yield_indexed_values(values, r, p)) {
rb_raise(rb_eRuntimeError, "permute reentered");
}
}
}
}
}
static VALUE
descending_factorial(long from, long how_many)
{
VALUE cnt = LONG2FIX(how_many >= 0);
while (how_many-- > 0) {
cnt = rb_funcall(cnt, '*', 1, LONG2FIX(from--));
}
return cnt;
}
static VALUE
binomial_coefficient(long comb, long size)
{
if (comb > size-comb) {
comb = size-comb;
}
if (comb < 0) {
return LONG2FIX(0);
}
return rb_funcall(descending_factorial(size, comb), id_div, 1, descending_factorial(comb, comb));
}
static VALUE
rb_ary_permutation_size(VALUE ary, VALUE args)
{
long n = RARRAY_LEN(ary);
long k = (args && (RARRAY_LEN(args) > 0)) ? NUM2LONG(RARRAY_PTR(args)[0]) : n;
return descending_factorial(n, k);
}
static VALUE
rb_ary_permutation(int argc, VALUE *argv, VALUE ary)
{
VALUE num;
long r, n, i;
n = RARRAY_LEN(ary);
RETURN_SIZED_ENUMERATOR(ary, argc, argv, rb_ary_permutation_size);
rb_scan_args(argc, argv, "01", &num);
r = NIL_P(num) ? n : NUM2LONG(num);
if (r < 0 || n < r) {
}
else if (r == 0) {
rb_yield(rb_ary_new2(0));
}
else if (r == 1) {
for (i = 0; i < RARRAY_LEN(ary); i++) {
rb_yield(rb_ary_new3(1, RARRAY_PTR(ary)[i]));
}
}
else {
volatile VALUE t0 = tmpbuf(r,sizeof(long));
long *p = (long*)RSTRING_PTR(t0);
volatile VALUE t1 = tmpbuf(n,sizeof(char));
char *used = (char*)RSTRING_PTR(t1);
VALUE ary0 = ary_make_shared_copy(ary);
RBASIC(ary0)->klass = 0;
MEMZERO(used, char, n);
permute0(n, r, p, 0, used, ary0);
tmpbuf_discard(t0);
tmpbuf_discard(t1);
RBASIC(ary0)->klass = rb_cArray;
}
return ary;
}
static VALUE
rb_ary_combination_size(VALUE ary, VALUE args)
{
long n = RARRAY_LEN(ary);
long k = NUM2LONG(RARRAY_PTR(args)[0]);
return binomial_coefficient(k, n);
}
static VALUE
rb_ary_combination(VALUE ary, VALUE num)
{
long n, i, len;
n = NUM2LONG(num);
RETURN_SIZED_ENUMERATOR(ary, 1, &num, rb_ary_combination_size);
len = RARRAY_LEN(ary);
if (n < 0 || len < n) {
}
else if (n == 0) {
rb_yield(rb_ary_new2(0));
}
else if (n == 1) {
for (i = 0; i < len; i++) {
rb_yield(rb_ary_new3(1, RARRAY_PTR(ary)[i]));
}
}
else {
VALUE ary0 = ary_make_shared_copy(ary);
volatile VALUE t0;
long *stack = ALLOCV_N(long, t0, n+1);
long lev = 0;
RBASIC(ary0)->klass = 0;
MEMZERO(stack+1, long, n);
stack[0] = -1;
for (;;) {
for (lev++; lev < n; lev++) {
stack[lev+1] = stack[lev]+1;
}
if (!yield_indexed_values(ary0, n, stack+1)) {
rb_raise(rb_eRuntimeError, "combination reentered");
}
do {
if (lev == 0) goto done;
stack[lev--]++;
} while (stack[lev+1]+n == len+lev+1);
}
done:
ALLOCV_END(t0);
RBASIC(ary0)->klass = rb_cArray;
}
return ary;
}
static void
rpermute0(long n, long r, long *p, long index, VALUE values)
{
long i;
for (i = 0; i < n; i++) {
p[index] = i;
if (index < r-1) {
rpermute0(n, r, p, index+1, values);
}
else {
if (!yield_indexed_values(values, r, p)) {
rb_raise(rb_eRuntimeError, "repeated permute reentered");
}
}
}
}
static VALUE
rb_ary_repeated_permutation_size(VALUE ary, VALUE args)
{
long n = RARRAY_LEN(ary);
long k = NUM2LONG(RARRAY_PTR(args)[0]);
if (k < 0) {
return LONG2FIX(0);
}
return rb_funcall(LONG2NUM(n), id_power, 1, LONG2NUM(k));
}
static VALUE
rb_ary_repeated_permutation(VALUE ary, VALUE num)
{
long r, n, i;
n = RARRAY_LEN(ary);
RETURN_SIZED_ENUMERATOR(ary, 1, &num, rb_ary_repeated_permutation_size);
r = NUM2LONG(num);
if (r < 0) {
}
else if (r == 0) {
rb_yield(rb_ary_new2(0));
}
else if (r == 1) {
for (i = 0; i < RARRAY_LEN(ary); i++) {
rb_yield(rb_ary_new3(1, RARRAY_PTR(ary)[i]));
}
}
else {
volatile VALUE t0 = tmpbuf(r, sizeof(long));
long *p = (long*)RSTRING_PTR(t0);
VALUE ary0 = ary_make_shared_copy(ary);
RBASIC(ary0)->klass = 0;
rpermute0(n, r, p, 0, ary0);
tmpbuf_discard(t0);
RBASIC(ary0)->klass = rb_cArray;
}
return ary;
}
static void
rcombinate0(long n, long r, long *p, long index, long rest, VALUE values)
{
if (rest > 0) {
for (; index < n; ++index) {
p[r-rest] = index;
rcombinate0(n, r, p, index, rest-1, values);
}
}
else {
if (!yield_indexed_values(values, r, p)) {
rb_raise(rb_eRuntimeError, "repeated combination reentered");
}
}
}
static VALUE
rb_ary_repeated_combination_size(VALUE ary, VALUE args)
{
long n = RARRAY_LEN(ary);
long k = NUM2LONG(RARRAY_PTR(args)[0]);
if (k == 0) {
return LONG2FIX(1);
}
return binomial_coefficient(k, n + k - 1);
}
static VALUE
rb_ary_repeated_combination(VALUE ary, VALUE num)
{
long n, i, len;
n = NUM2LONG(num);
RETURN_SIZED_ENUMERATOR(ary, 1, &num, rb_ary_repeated_combination_size);
len = RARRAY_LEN(ary);
if (n < 0) {
}
else if (n == 0) {
rb_yield(rb_ary_new2(0));
}
else if (n == 1) {
for (i = 0; i < len; i++) {
rb_yield(rb_ary_new3(1, RARRAY_PTR(ary)[i]));
}
}
else if (len == 0) {
}
else {
volatile VALUE t0 = tmpbuf(n, sizeof(long));
long *p = (long*)RSTRING_PTR(t0);
VALUE ary0 = ary_make_shared_copy(ary);
RBASIC(ary0)->klass = 0;
rcombinate0(len, n, p, 0, n, ary0);
tmpbuf_discard(t0);
RBASIC(ary0)->klass = rb_cArray;
}
return ary;
}
static VALUE
rb_ary_product(int argc, VALUE *argv, VALUE ary)
{
int n = argc+1;
volatile VALUE t0 = tmpary(n);
volatile VALUE t1 = tmpbuf(n, sizeof(int));
VALUE *arrays = RARRAY_PTR(t0);
int *counters = (int*)RSTRING_PTR(t1);
VALUE result = Qnil;
long i,j;
long resultlen = 1;
RBASIC(t0)->klass = 0;
RBASIC(t1)->klass = 0;
ARY_SET_LEN(t0, n);
arrays[0] = ary;
for (i = 1; i < n; i++) arrays[i] = Qnil;
for (i = 1; i < n; i++) arrays[i] = to_ary(argv[i-1]);
for (i = 0; i < n; i++) counters[i] = 0;
if (rb_block_given_p()) {
for (i = 0; i < n; i++) {
if (RARRAY_LEN(arrays[i]) == 0) goto done;
arrays[i] = ary_make_shared_copy(arrays[i]);
}
}
else {
for (i = 0; i < n; i++) {
long k = RARRAY_LEN(arrays[i]);
if (k == 0) {
result = rb_ary_new2(0);
goto done;
}
if (MUL_OVERFLOW_LONG_P(resultlen, k))
rb_raise(rb_eRangeError, "too big to product");
resultlen *= k;
}
result = rb_ary_new2(resultlen);
}
for (;;) {
int m;
VALUE subarray = rb_ary_new2(n);
for (j = 0; j < n; j++) {
rb_ary_push(subarray, rb_ary_entry(arrays[j], counters[j]));
}
if (NIL_P(result)) {
FL_SET(t0, FL_USER5);
rb_yield(subarray);
if (! FL_TEST(t0, FL_USER5)) {
rb_raise(rb_eRuntimeError, "product reentered");
}
else {
FL_UNSET(t0, FL_USER5);
}
}
else {
rb_ary_push(result, subarray);
}
m = n-1;
counters[m]++;
while (counters[m] == RARRAY_LEN(arrays[m])) {
counters[m] = 0;
if (--m < 0) goto done;
counters[m]++;
}
}
done:
tmpary_discard(t0);
tmpbuf_discard(t1);
return NIL_P(result) ? ary : result;
}
static VALUE
rb_ary_take(VALUE obj, VALUE n)
{
long len = NUM2LONG(n);
if (len < 0) {
rb_raise(rb_eArgError, "attempt to take negative size");
}
return rb_ary_subseq(obj, 0, len);
}
static VALUE
rb_ary_take_while(VALUE ary)
{
long i;
RETURN_ENUMERATOR(ary, 0, 0);
for (i = 0; i < RARRAY_LEN(ary); i++) {
if (!RTEST(rb_yield(RARRAY_PTR(ary)[i]))) break;
}
return rb_ary_take(ary, LONG2FIX(i));
}
static VALUE
rb_ary_drop(VALUE ary, VALUE n)
{
VALUE result;
long pos = NUM2LONG(n);
if (pos < 0) {
rb_raise(rb_eArgError, "attempt to drop negative size");
}
result = rb_ary_subseq(ary, pos, RARRAY_LEN(ary));
if (result == Qnil) result = rb_ary_new();
return result;
}
static VALUE
rb_ary_drop_while(VALUE ary)
{
long i;
RETURN_ENUMERATOR(ary, 0, 0);
for (i = 0; i < RARRAY_LEN(ary); i++) {
if (!RTEST(rb_yield(RARRAY_PTR(ary)[i]))) break;
}
return rb_ary_drop(ary, LONG2FIX(i));
}
void
Init_Array(void)
{
#undef rb_intern
#define rb_intern(str) rb_intern_const(str)
rb_cArray = rb_define_class("Array", rb_cObject);
rb_include_module(rb_cArray, rb_mEnumerable);
rb_define_alloc_func(rb_cArray, empty_ary_alloc);
rb_define_singleton_method(rb_cArray, "[]", rb_ary_s_create, -1);
rb_define_singleton_method(rb_cArray, "try_convert", rb_ary_s_try_convert, 1);
rb_define_method(rb_cArray, "initialize", rb_ary_initialize, -1);
rb_define_method(rb_cArray, "initialize_copy", rb_ary_replace, 1);
rb_define_method(rb_cArray, "inspect", rb_ary_inspect, 0);
rb_define_alias(rb_cArray, "to_s", "inspect");
rb_define_method(rb_cArray, "to_a", rb_ary_to_a, 0);
rb_define_method(rb_cArray, "to_ary", rb_ary_to_ary_m, 0);
rb_define_method(rb_cArray, "frozen?", rb_ary_frozen_p, 0);
rb_define_method(rb_cArray, "==", rb_ary_equal, 1);
rb_define_method(rb_cArray, "eql?", rb_ary_eql, 1);
rb_define_method(rb_cArray, "hash", rb_ary_hash, 0);
rb_define_method(rb_cArray, "[]", rb_ary_aref, -1);
rb_define_method(rb_cArray, "[]=", rb_ary_aset, -1);
rb_define_method(rb_cArray, "at", rb_ary_at, 1);
rb_define_method(rb_cArray, "fetch", rb_ary_fetch, -1);
rb_define_method(rb_cArray, "first", rb_ary_first, -1);
rb_define_method(rb_cArray, "last", rb_ary_last, -1);
rb_define_method(rb_cArray, "concat", rb_ary_concat, 1);
rb_define_method(rb_cArray, "<<", rb_ary_push, 1);
rb_define_method(rb_cArray, "push", rb_ary_push_m, -1);
rb_define_method(rb_cArray, "pop", rb_ary_pop_m, -1);
rb_define_method(rb_cArray, "shift", rb_ary_shift_m, -1);
rb_define_method(rb_cArray, "unshift", rb_ary_unshift_m, -1);
rb_define_method(rb_cArray, "insert", rb_ary_insert, -1);
rb_define_method(rb_cArray, "each", rb_ary_each, 0);
rb_define_method(rb_cArray, "each_index", rb_ary_each_index, 0);
rb_define_method(rb_cArray, "reverse_each", rb_ary_reverse_each, 0);
rb_define_method(rb_cArray, "length", rb_ary_length, 0);
rb_define_alias(rb_cArray, "size", "length");
rb_define_method(rb_cArray, "empty?", rb_ary_empty_p, 0);
rb_define_method(rb_cArray, "find_index", rb_ary_index, -1);
rb_define_method(rb_cArray, "index", rb_ary_index, -1);
rb_define_method(rb_cArray, "rindex", rb_ary_rindex, -1);
rb_define_method(rb_cArray, "join", rb_ary_join_m, -1);
rb_define_method(rb_cArray, "reverse", rb_ary_reverse_m, 0);
rb_define_method(rb_cArray, "reverse!", rb_ary_reverse_bang, 0);
rb_define_method(rb_cArray, "rotate", rb_ary_rotate_m, -1);
rb_define_method(rb_cArray, "rotate!", rb_ary_rotate_bang, -1);
rb_define_method(rb_cArray, "sort", rb_ary_sort, 0);
rb_define_method(rb_cArray, "sort!", rb_ary_sort_bang, 0);
rb_define_method(rb_cArray, "sort_by!", rb_ary_sort_by_bang, 0);
rb_define_method(rb_cArray, "collect", rb_ary_collect, 0);
rb_define_method(rb_cArray, "collect!", rb_ary_collect_bang, 0);
rb_define_method(rb_cArray, "map", rb_ary_collect, 0);
rb_define_method(rb_cArray, "map!", rb_ary_collect_bang, 0);
rb_define_method(rb_cArray, "select", rb_ary_select, 0);
rb_define_method(rb_cArray, "select!", rb_ary_select_bang, 0);
rb_define_method(rb_cArray, "keep_if", rb_ary_keep_if, 0);
rb_define_method(rb_cArray, "values_at", rb_ary_values_at, -1);
rb_define_method(rb_cArray, "delete", rb_ary_delete, 1);
rb_define_method(rb_cArray, "delete_at", rb_ary_delete_at_m, 1);
rb_define_method(rb_cArray, "delete_if", rb_ary_delete_if, 0);
rb_define_method(rb_cArray, "reject", rb_ary_reject, 0);
rb_define_method(rb_cArray, "reject!", rb_ary_reject_bang, 0);
rb_define_method(rb_cArray, "zip", rb_ary_zip, -1);
rb_define_method(rb_cArray, "transpose", rb_ary_transpose, 0);
rb_define_method(rb_cArray, "replace", rb_ary_replace, 1);
rb_define_method(rb_cArray, "clear", rb_ary_clear, 0);
rb_define_method(rb_cArray, "fill", rb_ary_fill, -1);
rb_define_method(rb_cArray, "include?", rb_ary_includes, 1);
rb_define_method(rb_cArray, "<=>", rb_ary_cmp, 1);
rb_define_method(rb_cArray, "slice", rb_ary_aref, -1);
rb_define_method(rb_cArray, "slice!", rb_ary_slice_bang, -1);
rb_define_method(rb_cArray, "assoc", rb_ary_assoc, 1);
rb_define_method(rb_cArray, "rassoc", rb_ary_rassoc, 1);
rb_define_method(rb_cArray, "+", rb_ary_plus, 1);
rb_define_method(rb_cArray, "*", rb_ary_times, 1);
rb_define_method(rb_cArray, "-", rb_ary_diff, 1);
rb_define_method(rb_cArray, "&", rb_ary_and, 1);
rb_define_method(rb_cArray, "|", rb_ary_or, 1);
rb_define_method(rb_cArray, "uniq", rb_ary_uniq, 0);
rb_define_method(rb_cArray, "uniq!", rb_ary_uniq_bang, 0);
rb_define_method(rb_cArray, "compact", rb_ary_compact, 0);
rb_define_method(rb_cArray, "compact!", rb_ary_compact_bang, 0);
rb_define_method(rb_cArray, "flatten", rb_ary_flatten, -1);
rb_define_method(rb_cArray, "flatten!", rb_ary_flatten_bang, -1);
rb_define_method(rb_cArray, "count", rb_ary_count, -1);
rb_define_method(rb_cArray, "shuffle!", rb_ary_shuffle_bang, -1);
rb_define_method(rb_cArray, "shuffle", rb_ary_shuffle, -1);
rb_define_method(rb_cArray, "sample", rb_ary_sample, -1);
rb_define_method(rb_cArray, "cycle", rb_ary_cycle, -1);
rb_define_method(rb_cArray, "permutation", rb_ary_permutation, -1);
rb_define_method(rb_cArray, "combination", rb_ary_combination, 1);
rb_define_method(rb_cArray, "repeated_permutation", rb_ary_repeated_permutation, 1);
rb_define_method(rb_cArray, "repeated_combination", rb_ary_repeated_combination, 1);
rb_define_method(rb_cArray, "product", rb_ary_product, -1);
rb_define_method(rb_cArray, "take", rb_ary_take, 1);
rb_define_method(rb_cArray, "take_while", rb_ary_take_while, 0);
rb_define_method(rb_cArray, "drop", rb_ary_drop, 1);
rb_define_method(rb_cArray, "drop_while", rb_ary_drop_while, 0);
rb_define_method(rb_cArray, "bsearch", rb_ary_bsearch, 0);
id_cmp = rb_intern("<=>");
sym_random = ID2SYM(rb_intern("random"));
id_div = rb_intern("div");
id_power = rb_intern("**");
}