From 1e760c0be3ed35874204114e7454509f740c0fe2 Mon Sep 17 00:00:00 2001 From: shyouhei Date: Wed, 22 Aug 2007 01:53:51 +0000 Subject: add tag v1_8_6_71 git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_8_5_71@13189 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- ruby_1_8_6/ext/enumerator/enumerator.c | 298 +++++++++++++++++++++++++++++++++ 1 file changed, 298 insertions(+) create mode 100644 ruby_1_8_6/ext/enumerator/enumerator.c (limited to 'ruby_1_8_6/ext/enumerator/enumerator.c') diff --git a/ruby_1_8_6/ext/enumerator/enumerator.c b/ruby_1_8_6/ext/enumerator/enumerator.c new file mode 100644 index 0000000000..1c6e1d1ace --- /dev/null +++ b/ruby_1_8_6/ext/enumerator/enumerator.c @@ -0,0 +1,298 @@ +/************************************************ + + enumerator.c - provides Enumerator class + + $Author$ + + Copyright (C) 2001-2003 Akinori MUSHA + + $Idaemons: /home/cvs/rb/enumerator/enumerator.c,v 1.1.1.1 2001/07/15 10:12:48 knu Exp $ + $RoughId: enumerator.c,v 1.6 2003/07/27 11:03:24 nobu Exp $ + $Id$ + +************************************************/ + +#include "ruby.h" +#include "node.h" + +/* + * Document-class: Enumerable::Enumerator + * + * A class which provides a method `each' to be used as an Enumerable + * object. + */ +static VALUE rb_cEnumerator; +static ID sym_each, sym_each_with_index, sym_each_slice, sym_each_cons; +static ID id_new, id_enum_obj, id_enum_method, id_enum_args; + +/* + * call-seq: + * obj.to_enum(method = :each, *args) + * obj.enum_for(method = :each, *args) + * + * Returns Enumerable::Enumerator.new(self, method, *args). + * + * e.g.: + * str = "xyz" + * + * enum = str.enum_for(:each_byte) + * a = enum.map {|b| '%02x' % b } #=> ["78", "79", "7a"] + * + * # protects an array from being modified + * a = [1, 2, 3] + * some_method(a.to_enum) + * + */ +static VALUE +obj_to_enum(obj, enum_args) + VALUE obj, enum_args; +{ + rb_ary_unshift(enum_args, obj); + + return rb_apply(rb_cEnumerator, id_new, enum_args); +} + +/* + * call-seq: + * enum_with_index + * + * Returns Enumerable::Enumerator.new(self, :each_with_index). + * + */ +static VALUE +enumerator_enum_with_index(obj) + VALUE obj; +{ + return rb_funcall(rb_cEnumerator, id_new, 2, obj, sym_each_with_index); +} + +static VALUE +each_slice_i(val, memo) + VALUE val; + NODE *memo; +{ + VALUE ary = memo->u1.value; + long size = memo->u3.cnt; + + rb_ary_push(ary, val); + + if (RARRAY(ary)->len == size) { + rb_yield(ary); + memo->u1.value = rb_ary_new2(size); + } + + return Qnil; +} + +/* + * call-seq: + * e.each_slice(n) {...} + * + * Iterates the given block for each slice of elements. + * + * e.g.: + * (1..10).each_slice(3) {|a| p a} + * # outputs below + * [1, 2, 3] + * [4, 5, 6] + * [7, 8, 9] + * [10] + * + */ +static VALUE +enum_each_slice(obj, n) + VALUE obj, n; +{ + long size = NUM2LONG(n); + NODE *memo; + VALUE ary; + + if (size <= 0) rb_raise(rb_eArgError, "invalid slice size"); + + memo = rb_node_newnode(NODE_MEMO, rb_ary_new2(size), 0, size); + + rb_iterate(rb_each, obj, each_slice_i, (VALUE)memo); + + ary = memo->u1.value; + if (RARRAY(ary)->len > 0) rb_yield(ary); + + return Qnil; +} + +/* + * call-seq: + * e.enum_slice(n) + * + * Returns Enumerable::Enumerator.new(self, :each_slice, n). + * + */ +static VALUE +enumerator_enum_slice(obj, n) + VALUE obj, n; +{ + return rb_funcall(rb_cEnumerator, id_new, 3, obj, sym_each_slice, n); +} + +static VALUE +each_cons_i(val, memo) + VALUE val; + NODE *memo; +{ + VALUE ary = memo->u1.value; + long size = memo->u3.cnt; + + if (RARRAY(ary)->len == size) { + rb_ary_shift(ary); + } + rb_ary_push(ary, val); + if (RARRAY(ary)->len == size) { + rb_yield(rb_ary_dup(ary)); + } + return Qnil; +} + +/* + * call-seq: + * each_cons(n) {...} + * + * Iterates the given block for each array of consecutive + * elements. + * + * e.g.: + * (1..10).each_cons(3) {|a| p a} + * # outputs below + * [1, 2, 3] + * [2, 3, 4] + * [3, 4, 5] + * [4, 5, 6] + * [5, 6, 7] + * [6, 7, 8] + * [7, 8, 9] + * [8, 9, 10] + * + */ +static VALUE +enum_each_cons(obj, n) + VALUE obj, n; +{ + long size = NUM2LONG(n); + NODE *memo; + + if (size <= 0) rb_raise(rb_eArgError, "invalid size"); + memo = rb_node_newnode(NODE_MEMO, rb_ary_new2(size), 0, size); + + rb_iterate(rb_each, obj, each_cons_i, (VALUE)memo); + + return Qnil; +} + +/* + * call-seq: + * e.enum_cons(n) + * + * Returns Enumerable::Enumerator.new(self, :each_cons, n). + * + */ +static VALUE +enumerator_enum_cons(obj, n) + VALUE obj, n; +{ + return rb_funcall(rb_cEnumerator, id_new, 3, obj, sym_each_cons, n); +} + +/* + * call-seq: + * Enumerable::Enumerator.new(obj, method = :each, *args) + * + * Creates a new Enumerable::Enumerator object, which is to be + * used as an Enumerable object using the given object's given + * method with the given arguments. + * + * e.g.: + * str = "xyz" + * + * enum = Enumerable::Enumerator.new(str, :each_byte) + * a = enum.map {|b| '%02x' % b } #=> ["78", "79", "7a"] + * + */ +static VALUE +enumerator_initialize(argc, argv, obj) + int argc; + VALUE *argv; + VALUE obj; +{ + VALUE enum_obj, enum_method, enum_args; + + rb_scan_args(argc, argv, "11*", &enum_obj, &enum_method, &enum_args); + + if (enum_method == Qnil) + enum_method = sym_each; + + rb_ivar_set(obj, id_enum_obj, enum_obj); + rb_ivar_set(obj, id_enum_method, enum_method); + rb_ivar_set(obj, id_enum_args, enum_args); + + return Qnil; +} + +static VALUE +enumerator_iter(memo) + NODE *memo; +{ + return rb_apply(memo->u1.value, memo->u2.id, memo->u3.value); +} + +/* + * call-seq: + * enum.each {...} + * + * Iterates the given block using the object and the method specified + * in the first place. + * + */ +static VALUE +enumerator_each(obj) + VALUE obj; +{ + VALUE val; + + obj = (VALUE)rb_node_newnode(NODE_MEMO, + rb_ivar_get(obj, id_enum_obj), + rb_to_id(rb_ivar_get(obj, id_enum_method)), + rb_ivar_get(obj, id_enum_args)); + val = rb_iterate((VALUE (*)_((VALUE)))enumerator_iter, obj, rb_yield, 0); + return val; +} + +void +Init_enumerator() +{ + VALUE rb_mEnumerable; + + rb_define_method(rb_mKernel, "to_enum", obj_to_enum, -2); + rb_define_method(rb_mKernel, "enum_for", obj_to_enum, -2); + + rb_mEnumerable = rb_path2class("Enumerable"); + + rb_define_method(rb_mEnumerable, "enum_with_index", enumerator_enum_with_index, 0); + rb_define_method(rb_mEnumerable, "each_slice", enum_each_slice, 1); + rb_define_method(rb_mEnumerable, "enum_slice", enumerator_enum_slice, 1); + rb_define_method(rb_mEnumerable, "each_cons", enum_each_cons, 1); + rb_define_method(rb_mEnumerable, "enum_cons", enumerator_enum_cons, 1); + + rb_cEnumerator = rb_define_class_under(rb_mEnumerable, "Enumerator", rb_cObject); + rb_include_module(rb_cEnumerator, rb_mEnumerable); + + rb_define_method(rb_cEnumerator, "initialize", enumerator_initialize, -1); + rb_define_method(rb_cEnumerator, "each", enumerator_each, 0); + + sym_each = ID2SYM(rb_intern("each")); + sym_each_with_index = ID2SYM(rb_intern("each_with_index")); + sym_each_slice = ID2SYM(rb_intern("each_slice")); + sym_each_cons = ID2SYM(rb_intern("each_cons")); + + id_new = rb_intern("new"); + id_enum_obj = rb_intern("enum_obj"); + id_enum_method = rb_intern("enum_method"); + id_enum_args = rb_intern("enum_args"); +} -- cgit v1.2.3