Class: List

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
ext/list/list.c

Constant Summary collapse

VERSION = 
rb_str_new2(LIST_VERSION)

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Object 



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# File 'ext/list/list.c', line 371

static VALUE
list_initialize(int argc, VALUE *argv, VALUE self)
{
  VALUE size, val;
  long len;
  long i;

  list_modify_check(self);
  if (argc == 0) {
    return self;
  }
  if (argc == 1 && !FIXNUM_P(argv[0])) {
    switch (rb_type(argv[0])) {
    case T_ARRAY:
      return list_push_ary(self, argv[0]);
    case T_DATA:
      return list_replace(self, argv[0]);
    default:
      break;
    }
  }

  rb_scan_args(argc, argv, "02", &size, &val);

  len = NUM2LONG(size);
  if (len < 0) {
    rb_raise(rb_eArgError, "negative size");
  }
  if (LIST_MAX_SIZE < len) {
    rb_raise(rb_eArgError, "size too big");
  }

  if (rb_block_given_p()) {
    if (argc == 2) {
      rb_warn("block supersedes default value argument");
    }
    for (i = 0; i < len; i++) {
      list_push(self, rb_yield(LONG2NUM(i)));
    }
  } else {
    for (i = 0; i < len; i++) {
      list_push(self, val);
    }
  }
  return self;
}

Class Method Details

.[](*args) ⇒ Object 



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# File 'ext/list/list.c', line 350

static VALUE
list_s_create(int argc, VALUE *argv, VALUE klass)
{
  VALUE list;

  list = rb_obj_alloc(klass);
  return list_push_m(argc, argv, list);
}

.try_convert(obj) ⇒ Object 



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# File 'ext/list/list.c', line 365

static VALUE
list_s_try_convert(VALUE dummy, VALUE obj)
{
  return check_list_type(obj);
}

Instance Method Details

#<<(obj) ⇒ Object 



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# File 'ext/list/list.c', line 299

static VALUE
list_push(VALUE self, VALUE obj)
{
  list_t *ptr;
  item_t *next;

  list_modify_check(self);
  if (self == obj) {
    rb_raise(rb_eArgError, "`List' cannot set recursive");
  }

  next = item_alloc(obj, NULL);

  Data_Get_Struct(self, list_t, ptr);
  if (ptr->first == NULL) {
    ptr->first = next;
    ptr->last = next;
    ptr->last->next = NULL;
  } else {
    ptr->last->next = next;
    ptr->last = next;
  }
  ptr->len++;
  return self;
}

#<=>(list2) ⇒ Object 



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# File 'ext/list/list.c', line 1895

static VALUE
list_cmp(VALUE list1, VALUE list2)
{
  VALUE v;
  list_t *p1, *p2;
  long len;

  if (rb_type(list2) != T_DATA) return Qnil;
  if (list1 == list2) return INT2FIX(0);
  v = rb_exec_recursive_paired(recursive_cmp, list1, list2, list2);
  if (v != Qundef) return v;
  Data_Get_Struct(list1, list_t, p1);
  Data_Get_Struct(list2, list_t, p2);
  len = p1->len - p2->len;
  if (len == 0) return INT2FIX(0);
  if (0 < len) return INT2FIX(1);
  return INT2FIX(-1);
}

#==(obj) ⇒ Object 



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# File 'ext/list/list.c', line 614

static VALUE
list_equal(VALUE self, VALUE obj)
{
  if (self == obj)
    return Qtrue;

  if (!rb_obj_is_kind_of(obj, cList)) {
    if (rb_type(obj) == T_ARRAY) {
      return Qfalse;
    }
    if (!rb_respond_to(obj, rb_intern("to_list"))) {
      return Qfalse;
    }
    return rb_equal(obj, self);
  }
  return rb_exec_recursive_paired(recursive_equal, self, obj, obj);

}

#[](*args) ⇒ Object 



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# File 'ext/list/list.c', line 740

static VALUE
list_aref(int argc, VALUE *argv, VALUE self)
{
  VALUE arg;
  long beg, len;
  list_t *ptr;

  Data_Get_Struct(self, list_t, ptr);
  if (argc == 2) {
    beg = NUM2LONG(argv[0]);
    len = NUM2LONG(argv[1]);
    if (beg < 0) {
      beg += ptr->len;
    }
    return list_subseq(self, beg, len);
  }
  if (argc != 1) {
    rb_scan_args(argc, argv, "11", NULL, NULL);
  }
  arg = argv[0];

  /* special case - speeding up */
  if (FIXNUM_P(arg)) {
    return list_entry(self, FIX2LONG(arg));
  }
  /* check if idx is Range */
  switch (rb_range_beg_len(arg, &beg, &len, ptr->len, 0)) {
  case Qfalse:
    break;
  case Qnil:
    return Qnil;
  default:
    return list_subseq(self, beg, len);
  }
  return list_entry(self, NUM2LONG(arg));
}

#[]=(*args) ⇒ Object 



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# File 'ext/list/list.c', line 900

static VALUE
list_aset(int argc, VALUE *argv, VALUE self)
{
  long offset, beg, len;
  list_t *ptr;

  list_modify_check(self);
  Data_Get_Struct(self, list_t, ptr);
  if (argc == 3) {
    beg = NUM2LONG(argv[0]);
    len = NUM2LONG(argv[1]);
    list_splice(self, beg, len, argv[2]);
    return argv[2];
  }
  rb_check_arity(argc, 2, 2);
  if (FIXNUM_P(argv[0])) {
    offset = FIX2LONG(argv[0]);
    goto fixnum;
  }
  if (rb_range_beg_len(argv[0], &beg, &len, ptr->len, 1)) {
    /* check if idx is Range */
    list_splice(self, beg, len, argv[1]);
    return argv[1];
  }

  offset = NUM2LONG(argv[0]);
fixnum:
  list_store(self, offset, argv[1]);
  return argv[1];
}

#at(pos) ⇒ Object 



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# File 'ext/list/list.c', line 931

static VALUE
list_at(VALUE self, VALUE pos)
{
  return list_entry(self, NUM2LONG(pos));
}

#clear ⇒ Object 



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# File 'ext/list/list.c', line 452

static VALUE
list_clear(VALUE self)
{
  list_modify_check(self);
  list_t *ptr;
  Data_Get_Struct(self, list_t, ptr);
  list_free(ptr);
  ptr->first = NULL;
  ptr->last = NULL;
  ptr->len = 0;
  return self;
}

#collect ⇒ Object 



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# File 'ext/list/list.c', line 1503

static VALUE
list_collect(VALUE self)
{
  return list_collect_bang(rb_obj_clone(self));
}

#collect! ⇒ Object 



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# File 'ext/list/list.c', line 1489

static VALUE
list_collect_bang(VALUE self)
{
  list_t *ptr;
  item_t *c;

  RETURN_SIZED_ENUMERATOR(self, 0, 0, list_enum_length);
  Data_Get_Struct(self, list_t, ptr);
  LIST_FOR(ptr, c) {
    c->value = rb_yield(c->value);
  }
  return self;
}

#concat(obj) ⇒ Object 



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# File 'ext/list/list.c', line 1020

static VALUE
list_concat(VALUE self, VALUE obj)
{
  long len;
  list_t *ptr_self;
  list_t *ptr_obj;
  enum ruby_value_type type;

  list_modify_check(self);
  type = rb_type(obj);
  if (type == T_DATA) {
    Data_Get_Struct(obj, list_t, ptr_obj);
    len = ptr_obj->len;
  } else if (type == T_ARRAY) {
    len = RARRAY_LEN(obj);
  } else {
    obj = to_list(obj);
    Data_Get_Struct(obj, list_t, ptr_obj);
    len = ptr_obj->len;
  }

  Data_Get_Struct(self, list_t, ptr_self);
  if (0 < len) {
    list_splice(self, ptr_self->len, 0, obj);
  }
  return self;
}

#delete(item) ⇒ Object 



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# File 'ext/list/list.c', line 1584

static VALUE
list_delete(VALUE self, VALUE item)
{
  list_t *ptr;
  item_t *c, *before = NULL, *next;
  long len;

  list_modify_check(self);
  Data_Get_Struct(self, list_t, ptr);
  if (ptr->len == 0) return Qnil;

  len = ptr->len;
  for (c = ptr->first; c; c = next) {
    next = c->next;
    if (rb_equal(c->value, item)) {
      if (ptr->first == ptr->last) {
        ptr->first = NULL;
        ptr->last = NULL;
      } else if (c == ptr->first) {
        ptr->first = c->next;
      } else if (c == ptr->last) {
        ptr->last = before;
        ptr->last->next = NULL;
      } else {
        before->next = c->next;
      }
      xfree(c);
      ptr->len--;
    } else {
      before = c;
    }
  }

  if (ptr->len == len) {
    if (rb_block_given_p()) {
      return rb_yield(item);
    }
    return Qnil;
  } else {
    return item;
  }
}

#delete_at(pos) ⇒ Object 



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# File 'ext/list/list.c', line 1674

static VALUE
list_delete_at_m(VALUE self, VALUE pos)
{
  return list_delete_at(self, NUM2LONG(pos));
}

#delete_if ⇒ Object 



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# File 'ext/list/list.c', line 1750

static VALUE
list_delete_if(VALUE self)
{
  RETURN_SIZED_ENUMERATOR(self, 0, 0, list_enum_length);
  list_reject_bang(self);
  return self;
}

#each ⇒ Object 



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# File 'ext/list/list.c', line 418

static VALUE
list_each(VALUE self)
{
  item_t *c;
  list_t *ptr;

  RETURN_SIZED_ENUMERATOR(self, 0, 0, list_enum_length);
  Data_Get_Struct(self, list_t, ptr);
  if (ptr->first == NULL) return self;

  LIST_FOR(ptr, c) {
    rb_yield(c->value);
  }
  return self;
}

#each_index ⇒ Object 



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# File 'ext/list/list.c', line 434

static VALUE
list_each_index(VALUE self)
{
  item_t *c;
  list_t *ptr;
  long index;

  RETURN_SIZED_ENUMERATOR(self, 0, 0, list_enum_length);
  Data_Get_Struct(self, list_t, ptr);
  if (ptr->first == NULL) return self;

  index = 0;
  LIST_FOR(ptr, c) {
    rb_yield(LONG2NUM(index++));
  }
  return self;
}

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/list/list.c', line 1175

static VALUE
list_empty_p(VALUE self)
{
  list_t *ptr;
  Data_Get_Struct(self, list_t, ptr);
  if (ptr->len == 0)
    return Qtrue;
  return Qfalse;
}

#fetch(*args) ⇒ Object 



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# File 'ext/list/list.c', line 937

static VALUE
list_fetch(int argc, VALUE *argv, VALUE self)
{
  VALUE pos, ifnone;
  long block_given;
  long idx;
  list_t *ptr;

  Data_Get_Struct(self, list_t, ptr);
  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 += ptr->len;
  }
  if (idx < 0 || ptr->len <= 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 ? ptr->len : 0), -ptr->len, ptr->len);
    }
    return ifnone;
  }
  return list_entry(self, idx);
}

#fill(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1791

static VALUE
list_fill(int argc, VALUE *argv, VALUE self)
{
  VALUE item, arg1, arg2;
  long beg = 0, len = 0, end = 0;
  long i;
  int block_p = FALSE;
  list_t *ptr;
  item_t *c;

  Data_Get_Struct(self, list_t, ptr);

  list_modify_check(self);
  if (rb_block_given_p()) {
    block_p = TRUE;
    rb_scan_args(argc, argv, "02", &arg1, &arg2);
    argc += 1; /* hackish */
  } else {
    rb_scan_args(argc, argv, "12", &item, &arg1, &arg2);
  }
  switch (argc) {
  case 1:
    beg = 0;
    len = ptr->len;
    break;
  case 2:
    if (rb_range_beg_len(arg1, &beg, &len, ptr->len, 1)) {
      break;
    }
    /* fall through */
  case 3:
    beg = NIL_P(arg1) ? 0 : NUM2LONG(arg1);
    if (beg < 0) {
      beg = ptr->len + beg;
      if (beg < 0) beg = 0;
    }
    len = NIL_P(arg2) ? ptr->len - beg : NUM2LONG(arg2);
    break;
  }
  if (len < 0) {
    return self;
  }
  if (LIST_MAX_SIZE <= beg || LIST_MAX_SIZE - beg < len) {
    rb_raise(rb_eArgError, "argument too big");
  }
  end = beg + len;
  if (ptr->len < end) {
    for (i = 0; i < end - ptr->len; i++) {
      list_push(self, Qnil);
    }
  }

  i = -1;
  LIST_FOR(ptr, c) {
    i++;
    if (i < beg) continue;
    if ((end - 1) < i) break;
    if (block_p) {
      c->value = rb_yield(LONG2NUM(i));
    } else {
      c->value = item;
    }
  }
  return self;
}

#first(*args) ⇒ Object 



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# File 'ext/list/list.c', line 991

static VALUE
list_first(int argc, VALUE *argv, VALUE self)
{
  list_t *ptr;
  Data_Get_Struct(self, list_t, ptr);
  if (argc == 0) {
    if (ptr->first == NULL) return Qnil;
    return ptr->first->value;
  } else {
    return list_take_first_or_last(argc, argv, self, LIST_TAKE_FIRST);
  }
}

#frozen? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/list/list.c', line 585

static VALUE
list_frozen_p(VALUE self)
{
  if (OBJ_FROZEN(self)) return Qtrue;
  return Qfalse;
}

#hash ⇒ Object 



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# File 'ext/list/list.c', line 633

static VALUE
list_hash(VALUE self)
{
  item_t *c;
  st_index_t h;
  list_t *ptr;
  VALUE n;

  Data_Get_Struct(self, list_t, ptr);
  h = rb_hash_start(ptr->len);
  h = rb_hash_uint(h, (st_index_t)list_hash);
  LIST_FOR(ptr, c) {
    n = rb_hash(c->value);
    h = rb_hash_uint(h, NUM2LONG(n));
  }
  h = rb_hash_end(h);
  return LONG2FIX(h);
}

#include?(item) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/list/list.c', line 1857

static VALUE
list_include_p(VALUE self, VALUE item)
{
  list_t *ptr;
  item_t *c;

  Data_Get_Struct(self, list_t, ptr);
  LIST_FOR (ptr, c) {
    if (rb_equal(c->value, item)) {
      return Qtrue;
    }
  }
  return Qfalse;
}

#initialize_copy(orig) ⇒ Object 



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# File 'ext/list/list.c', line 495

static VALUE
list_replace(VALUE copy, VALUE orig)
{
  list_t *ptr_copy;
  list_t *ptr_orig;
  item_t *c_orig;
  item_t *c_copy;
  long olen;

  list_modify_check(copy);
  if (copy == orig) return copy;

  switch (rb_type(orig)) {
  case T_ARRAY:
    return list_replace_ary(copy, orig);
  case T_DATA:
    break;
  default:
    rb_raise(rb_eTypeError, "cannot convert to list");
  }
  orig = to_list(orig);
  Data_Get_Struct(copy, list_t, ptr_copy);
  Data_Get_Struct(orig, list_t, ptr_orig);
  olen = ptr_orig->len;
  if (olen == 0) {
    return list_clear(copy);
  }
  if (olen == ptr_copy->len) {
    LIST_FOR_DOUBLE(ptr_orig, c_orig, ptr_copy, c_copy, {
      c_copy->value = c_orig->value;
    });
  } else {
    list_clear(copy);
    LIST_FOR(ptr_orig, c_orig) {
      list_push(copy, c_orig->value);
    }
  }

  return copy;
}

#insert(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1146

static VALUE
list_insert(int argc, VALUE *argv, VALUE self)
{
  list_t *ptr;
  long pos;

  Data_Get_Struct(self, list_t, ptr);
  rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);
  list_modify_check(self);
  if (argc == 1) return self;
  pos = NUM2LONG(argv[0]);
  if (pos == -1) {
    pos = ptr->len;
  }
  if (pos < 0) {
    pos++;
  }
  list_splice(self, pos, 0, rb_ary_new4(argc - 1, argv + 1));
  return self;
}

#inspect ⇒ Object Also known as: to_s 



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# File 'ext/list/list.c', line 559

static VALUE
list_inspect(VALUE self)
{
  list_t *ptr;
  Data_Get_Struct(self, list_t, ptr);
  if (ptr->len == 0)
    return rb_sprintf("#<%s: []>", rb_obj_classname(self));
  return rb_exec_recursive(inspect_list, self, 0);
}

#join(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1362

static VALUE
list_join_m(int argc, VALUE *argv, VALUE self)
{
  VALUE sep;

  rb_scan_args(argc, argv, "01", &sep);
  if (NIL_P(sep)) sep = rb_output_fs;

  return list_join(self, sep);
}

#keep_if ⇒ Object 



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# File 'ext/list/list.c', line 1549

static VALUE
list_keep_if(VALUE self)
{
  RETURN_SIZED_ENUMERATOR(self, 0, 0, list_enum_length);
  list_select_bang(self);
  return self;
}

#last(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1004

static VALUE
list_last(int argc, VALUE *argv, VALUE self)
{
  list_t *ptr;
  long len;

  Data_Get_Struct(self, list_t, ptr);
  if (argc == 0) {
    len = ptr->len;
    if (len == 0) return Qnil;
    return list_elt(self, len - 1);
  } else {
    return list_take_first_or_last(argc, argv, self, LIST_TAKE_LAST);
  }
}

#length ⇒ Object Also known as: size 



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# File 'ext/list/list.c', line 1167

static VALUE
list_length(VALUE self)
{
  list_t *ptr;
  Data_Get_Struct(self, list_t, ptr);
  return LONG2NUM(ptr->len);
}

#map ⇒ Object 



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# File 'ext/list/list.c', line 1503

static VALUE
list_collect(VALUE self)
{
  return list_collect_bang(rb_obj_clone(self));
}

#map! ⇒ Object 



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# File 'ext/list/list.c', line 1489

static VALUE
list_collect_bang(VALUE self)
{
  list_t *ptr;
  item_t *c;

  RETURN_SIZED_ENUMERATOR(self, 0, 0, list_enum_length);
  Data_Get_Struct(self, list_t, ptr);
  LIST_FOR(ptr, c) {
    c->value = rb_yield(c->value);
  }
  return self;
}

#pop(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1062

static VALUE
list_pop_m(int argc, VALUE *argv, VALUE self)
{
  list_t *ptr;
  VALUE result;
  long n;

  if (argc == 0) {
    return list_pop(self);
  }

  list_modify_check(self);
  result = list_take_first_or_last(argc, argv, self, LIST_TAKE_LAST);
  Data_Get_Struct(self, list_t, ptr);
  n = NUM2LONG(argv[0]);
  list_mem_clear(ptr, ptr->len - n, n);
  return result;
}

#push(*args) ⇒ Object 



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# File 'ext/list/list.c', line 337

static VALUE
list_push_m(int argc, VALUE *argv, VALUE self)
{
  long i;

  list_modify_check(self);
  if (argc == 0) return self;
  for (i = 0; i < argc; i++) {
    list_push(self, argv[i]);
  }
  return self;
}

#reject ⇒ Object 



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# File 'ext/list/list.c', line 1739

static VALUE
list_reject(VALUE self)
{
  VALUE rejected_list;

  RETURN_SIZED_ENUMERATOR(self, 0, 0, list_enum_length);
  rejected_list = list_new();
  reject(self, rejected_list);
  return rejected_list;
}

#reject! ⇒ Object 



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# File 'ext/list/list.c', line 1732

static VALUE
list_reject_bang(VALUE self)
{
  RETURN_SIZED_ENUMERATOR(self, 0, 0, list_enum_length);
  return reject_bang(self);
}

#replace(orig) ⇒ Object 



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# File 'ext/list/list.c', line 495

static VALUE
list_replace(VALUE copy, VALUE orig)
{
  list_t *ptr_copy;
  list_t *ptr_orig;
  item_t *c_orig;
  item_t *c_copy;
  long olen;

  list_modify_check(copy);
  if (copy == orig) return copy;

  switch (rb_type(orig)) {
  case T_ARRAY:
    return list_replace_ary(copy, orig);
  case T_DATA:
    break;
  default:
    rb_raise(rb_eTypeError, "cannot convert to list");
  }
  orig = to_list(orig);
  Data_Get_Struct(copy, list_t, ptr_copy);
  Data_Get_Struct(orig, list_t, ptr_orig);
  olen = ptr_orig->len;
  if (olen == 0) {
    return list_clear(copy);
  }
  if (olen == ptr_copy->len) {
    LIST_FOR_DOUBLE(ptr_orig, c_orig, ptr_copy, c_copy, {
      c_copy->value = c_orig->value;
    });
  } else {
    list_clear(copy);
    LIST_FOR(ptr_orig, c_orig) {
      list_push(copy, c_orig->value);
    }
  }

  return copy;
}

#reverse ⇒ Object 



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# File 'ext/list/list.c', line 1391

static VALUE
list_reverse_m(VALUE self)
{
  VALUE result;
  item_t *c;
  list_t *ptr;

  Data_Get_Struct(self, list_t, ptr);
  result = list_new();
  if (ptr->len == 0) return result;
  LIST_FOR(ptr, c) {
    list_unshift(result, c->value);
  }
  return result;
}

#reverse! ⇒ Object 



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# File 'ext/list/list.c', line 1373

static VALUE
list_reverse_bang(VALUE self)
{
  VALUE tmp;
  item_t *c;
  list_t *ptr;
  long len;

  Data_Get_Struct(self, list_t, ptr);
  if (ptr->len == 0) return self;
  tmp = list_to_a(self);
  len = ptr->len;
  LIST_FOR(ptr, c) {
    c->value = rb_ary_entry(tmp, --len);
  }
  return self;
}

#rindex(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1185

static VALUE
list_rindex(int argc, VALUE *argv, VALUE self)
{
  list_t *ptr;
  long i;
  long len;
  VALUE val;

  Data_Get_Struct(self, list_t, ptr);
  i = ptr->len;
  if (argc == 0) {
    RETURN_ENUMERATOR(self, 0, 0);
    while (i--) {
      Data_Get_Struct(self, list_t, ptr);
      if (RTEST(rb_yield(list_elt_ptr(ptr, i))))
        return LONG2NUM(i);
      if (ptr->len < i) {
        i = ptr->len;
      }
    }
    return Qnil;
  }
  rb_check_arity(argc, 0, 1);
  val = argv[0];
  if (rb_block_given_p())
    rb_warn("given block not used");
  Data_Get_Struct(self, list_t, ptr);
  while (i--) {
    if (rb_equal(list_elt_ptr(ptr, i), val)) {
      return LONG2NUM(i);
    }
    len = ptr->len;
    if (len < i) {
      i = len;
    }
    Data_Get_Struct(self, list_t, ptr);
  }
  return Qnil;
}

#ring ⇒ Object 



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# File 'ext/list/list.c', line 1971

static VALUE
list_ring(VALUE self)
{
  VALUE clone = rb_obj_clone(self);
  return list_ring_bang(clone);
}

#ring! ⇒ Object 



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# File 'ext/list/list.c', line 1958

static VALUE
list_ring_bang(VALUE self)
{
  list_t *ptr;

  Data_Get_Struct(self, list_t, ptr);
  if (ptr->first == NULL)
    rb_raise(rb_eRuntimeError, "length is zero list cannot to change ring");
  rb_obj_freeze(self);
  ptr->last->next = ptr->first;
  return self;
}

#ring? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/list/list.c', line 1978

static VALUE
list_ring_p(VALUE self)
{
  list_t *ptr;

  Data_Get_Struct(self, list_t, ptr);
  if (ptr->first == NULL)
    return Qfalse;
  if (ptr->first == ptr->last->next)
    return Qtrue;
  return Qfalse;
}

#rotate(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1434

static VALUE
list_rotate_m(int argc, VALUE *argv, VALUE self)
{
  VALUE clone = rb_obj_clone(self);
  return list_rotate_bang(argc, argv, clone);
}

#rotate!(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1407

static VALUE
list_rotate_bang(int argc, VALUE *argv, VALUE self)
{
  list_t *ptr;
  item_t *c;
  long cnt = 1;
  long i = 0;

  switch (argc) {
  case 1: cnt = NUM2LONG(argv[0]);
  case 0: break;
  default: rb_scan_args(argc, argv, "01", NULL);
  }

  Data_Get_Struct(self, list_t, ptr);
  if (ptr->len == 0) return self;
  cnt = (cnt < 0) ? (ptr->len - (~cnt % ptr->len) - 1) : (cnt & ptr->len);
  LIST_FOR(ptr, c) {
    if (cnt == ++i) break;
  }
  ptr->last->next = ptr->first;
  ptr->first = c->next;
  ptr->last = c;
  ptr->last->next = NULL;
  return self;
}

#select ⇒ Object 



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# File 'ext/list/list.c', line 1509

static VALUE
list_select(VALUE self)
{
  VALUE result;
  list_t *ptr;
  item_t *c;

  RETURN_SIZED_ENUMERATOR(self, 0, 0, list_enum_length);
  Data_Get_Struct(self, list_t, ptr);
  result = list_new();
  LIST_FOR(ptr, c) {
    if (RTEST(rb_yield(c->value))) {
      list_push(result, c->value);
    }
  }
  return result;
}

#select! ⇒ Object 



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# File 'ext/list/list.c', line 1527

static VALUE
list_select_bang(VALUE self)
{
  VALUE result;
  list_t *ptr;
  item_t *c;
  long i = 0;

  RETURN_SIZED_ENUMERATOR(self, 0, 0, list_enum_length);
  Data_Get_Struct(self, list_t, ptr);
  result = list_new();
  LIST_FOR(ptr, c) {
    if (RTEST(rb_yield(c->value))) {
      i++;
      list_push(result, c->value);
    }
  }

  if (i == ptr->len) return Qnil;
  return list_replace(self, result);
}

#shift(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1094

static VALUE
list_shift_m(int argc, VALUE *argv, VALUE self)
{
  VALUE result;
  long i;
  list_t *ptr_res;

  if (argc == 0) {
    return list_shift(self);
  }

  list_modify_check(self);
  result = list_take_first_or_last(argc, argv, self, LIST_TAKE_FIRST);
  Data_Get_Struct(result, list_t, ptr_res);
  for (i = 0; i < ptr_res->len; i++) {
    list_shift(self);
  }
  return result;
}

#slice(*args) ⇒ Object 



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# File 'ext/list/list.c', line 740

static VALUE
list_aref(int argc, VALUE *argv, VALUE self)
{
  VALUE arg;
  long beg, len;
  list_t *ptr;

  Data_Get_Struct(self, list_t, ptr);
  if (argc == 2) {
    beg = NUM2LONG(argv[0]);
    len = NUM2LONG(argv[1]);
    if (beg < 0) {
      beg += ptr->len;
    }
    return list_subseq(self, beg, len);
  }
  if (argc != 1) {
    rb_scan_args(argc, argv, "11", NULL, NULL);
  }
  arg = argv[0];

  /* special case - speeding up */
  if (FIXNUM_P(arg)) {
    return list_entry(self, FIX2LONG(arg));
  }
  /* check if idx is Range */
  switch (rb_range_beg_len(arg, &beg, &len, ptr->len, 0)) {
  case Qfalse:
    break;
  case Qnil:
    return Qnil;
  default:
    return list_subseq(self, beg, len);
  }
  return list_entry(self, NUM2LONG(arg));
}

#slice!(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1914

static VALUE
list_slice_bang(int argc, VALUE *argv, VALUE self)
{
  long pos = 0, len = 0;
  list_t *ptr;

  Data_Get_Struct(self, list_t, ptr);

  list_modify_check(self);
  if (argc == 1) {
    if (FIXNUM_P(argv[0])) {
      return list_delete_at(self, NUM2LONG(argv[0]));
    } else {
      switch (rb_range_beg_len(argv[0], &pos, &len, ptr->len, 0)) {
      case Qtrue: /* valid range */
        break;
      case Qnil: /* invalid range */
        return Qnil;
      default: /* not a range */
        return list_delete_at(self, NUM2LONG(argv[0]));
      }
    }
  } else if (argc == 2) {
    pos = NUM2LONG(argv[0]);
    len = NUM2LONG(argv[1]);
  } else {
    rb_scan_args(argc, argv, "11", NULL, NULL);
  }
  if (len < 0) return Qnil;
  if (pos < 0) {
    pos += ptr->len;
    if (pos < 0) return Qnil;
  } else if (ptr->len < pos) {
    return Qnil;
  }
  if (ptr->len < pos + len) {
    len = ptr->len - pos;
  }
  if (len == 0) return list_new();
  VALUE list2 = list_subseq(self, pos, len);
  list_mem_clear(ptr, pos, len);
  return list2;
}

#sort ⇒ Object 



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# File 'ext/list/list.c', line 1457

static VALUE
list_sort(VALUE self)
{
  VALUE clone = rb_obj_clone(self);
  return list_sort_bang(clone);
}

#sort! ⇒ Object 



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# File 'ext/list/list.c', line 1441

static VALUE
list_sort_bang(VALUE self)
{
  list_t *ptr;
  item_t *c;
  long i = 0;

  VALUE ary = list_to_a(self);
  rb_ary_sort_bang(ary);
  Data_Get_Struct(self, list_t, ptr);
  LIST_FOR(ptr, c) {
    c->value = rb_ary_entry(ary, i++);
  }
  return self;
}

#sort_by ⇒ Object 



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# File 'ext/list/list.c', line 1470

static VALUE
list_sort_by(VALUE self)
{
  VALUE ary;

  RETURN_SIZED_ENUMERATOR(self, 0, 0, list_enum_length);
  ary = rb_block_call(list_to_a(self), rb_intern("sort_by"), 0, 0, sort_by_i, 0);
  return to_list(ary);
}

#sort_by! ⇒ Object 



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# File 'ext/list/list.c', line 1480

static VALUE
list_sort_by_bang(VALUE self)
{
  VALUE sorted;

  sorted = list_sort_by(self);
  return list_replace(self, sorted);
}

#to_a ⇒ Object 



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# File 'ext/list/list.c', line 569

static VALUE
list_to_a(VALUE self)
{
  list_t *ptr;
  item_t *c;
  VALUE ary;
  long i = 0;

  Data_Get_Struct(self, list_t, ptr);
  ary = rb_ary_new2(ptr->len);
  LIST_FOR(ptr, c) {
    rb_ary_store(ary, i++, c->value);
  }
  return ary;
}

#to_ary ⇒ Object 



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# File 'ext/list/list.c', line 569

static VALUE
list_to_a(VALUE self)
{
  list_t *ptr;
  item_t *c;
  VALUE ary;
  long i = 0;

  Data_Get_Struct(self, list_t, ptr);
  ary = rb_ary_new2(ptr->len);
  LIST_FOR(ptr, c) {
    rb_ary_store(ary, i++, c->value);
  }
  return ary;
}

#to_list ⇒ Object 



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# File 'ext/list/list.c', line 1991

static VALUE
list_to_list(VALUE self)
{
  return self;
}

#transpose ⇒ Object 



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# File 'ext/list/list.c', line 1778

static VALUE
list_transpose(VALUE self)
{
  VALUE ary;
  long i;

  ary = rb_funcall(list_to_a(self), rb_intern("transpose"), 0);
  for (i = 0; i < RARRAY_LEN(ary); i++) {
    rb_ary_store(ary, i, to_list(rb_ary_entry(ary, i)));
  }
  return to_list(ary);
}

#unshift(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1133

static VALUE
list_unshift_m(int argc, VALUE *argv, VALUE self)
{
  long i;

  list_modify_check(self);
  if (argc == 0) return self;
  for (i = 0; i < argc; i++) {
    list_unshift(self, argv[i]);
  }
  return self;
}

#values_at(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1557

static VALUE
list_values_at(int argc, VALUE *argv, VALUE self)
{
  VALUE result = list_new();
  long beg, len;
  long i, j;
  list_t *ptr;

  Data_Get_Struct(self, list_t, ptr);
  for (i = 0; i < argc; i++) {
    if (FIXNUM_P(argv[i])) {
      list_push(result, list_entry(self, FIX2LONG(argv[i])));
    } else if (rb_range_beg_len(argv[i], &beg, &len, ptr->len, 1)) {
      for (j = beg; j < beg + len; j++) {
        if (ptr->len < j) {
          list_push(result, Qnil);
        } else {
          list_push(result, list_elt_ptr(ptr, j));
        }
      }
    } else {
      list_push(result, list_entry(self, NUM2LONG(argv[i])));
    }
  }
  return result;
}

#zip(*args) ⇒ Object 



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# File 'ext/list/list.c', line 1758

static VALUE
list_zip(int argc, VALUE *argv, VALUE self)
{
  VALUE ary;
  long i;

  ary = rb_funcall2(list_to_a(self), rb_intern("zip"), argc, argv);
  for (i = 0; i < RARRAY_LEN(ary); i++) {
    rb_ary_store(ary, i, to_list(rb_ary_entry(ary, i)));
  }
  if (rb_block_given_p()) {
    for (i = 0; i < RARRAY_LEN(ary); i++) {
      rb_yield(rb_ary_entry(ary, i));
    }
    return Qnil;
  } else {
    return to_list(ary);
  }
}