1 files changed, 150 insertions, 0 deletions
diff --git a/assoc.c b/assoc.c
new file mode 100644
index 0000000000..ef20c0216b
--- /dev/null
+++ b/assoc.c
@@ -0,0 +1,150 @@
+/************************************************
+
+  assoc.c -
+
+  $Author: matz $
+  $Date: 1995/01/10 10:30:37 $
+  created at: Fri Jan  6 10:10:36 JST 1995
+
+  Copyright (C) 1995 Yukihiro Matsumoto
+
+************************************************/
+
+#include "ruby.h"
+
+static VALUE C_Assoc;
+
+static ID eq;
+
+VALUE rb_to_a();
+
+VALUE
+assoc_new(car, cdr)
+    VALUE car, cdr;
+{
+    NEWOBJ(assoc, struct RAssoc);
+    OBJSETUP(assoc, C_Assoc, T_ASSOC);
+
+    assoc->car = car;
+    assoc->cdr = cdr;
+
+    return (VALUE)assoc;
+}
+
+static VALUE
+Fassoc_car(assoc)
+    struct RAssoc *assoc;
+{
+    return assoc->car;
+}
+
+static VALUE
+Fassoc_cdr(assoc)
+    struct RAssoc *assoc;
+{
+    return assoc->cdr;
+}
+
+static VALUE
+Fassoc_set_car(assoc, val)
+    struct RAssoc *assoc;
+    VALUE val;
+{
+    return assoc->car = val;
+}
+
+static VALUE
+Fassoc_set_cdr(assoc, val)
+    struct RAssoc *assoc;
+    VALUE val;
+{
+    return assoc->cdr = val;
+}
+
+static VALUE
+Fassoc_equal(assoc1, assoc2)
+    struct RAssoc *assoc1, *assoc2;
+{
+    if (TYPE(assoc2) != T_ASSOC) return FALSE;
+    if (!rb_equal(assoc1->car, assoc2->car)) return FALSE;
+    return rb_equal(assoc1->cdr, assoc2->cdr);
+}
+
+static VALUE
+Fassoc_hash(assoc)
+    struct RAssoc *assoc;
+{
+    static ID hash;
+    int key;
+
+    if (!hash) hash = rb_intern("hash");
+    key = rb_funcall(assoc->car, hash, 0, 0);
+    key ^= rb_funcall(assoc->cdr, hash, 0, 0);
+    return INT2FIX(key);
+}
+
+static VALUE
+Fassoc_to_s(assoc)
+    struct RAssoc *assoc;
+{
+    VALUE str1, str2;
+    static ID to_s;
+
+    if (!to_s) to_s = rb_intern("to_s");
+
+    str1 = rb_funcall(assoc->car, to_s, 0);
+    assoc = RASSOC(assoc->cdr);
+    while (assoc) {
+	if (TYPE(assoc) != T_ASSOC) {
+	    str2 = rb_funcall(assoc, to_s, 0);
+	    str_cat(str1, RSTRING(str2)->ptr, RSTRING(str2)->len);
+	    break;
+	}
+	str2 = rb_funcall(assoc->car, to_s, 0);
+	str_cat(str1, RSTRING(str2)->ptr, RSTRING(str2)->len);
+	assoc = RASSOC(assoc->cdr);
+    }
+
+    return str1;
+}
+
+static VALUE
+Fassoc_inspect(assoc)
+    struct RAssoc *assoc;
+{
+    VALUE str1, str2;
+    static ID inspect;
+
+    if (!inspect) inspect = rb_intern("_inspect");
+
+    str1 = rb_funcall(assoc->car, inspect, 0, 0);
+    str2 = rb_funcall(assoc->cdr, inspect, 0, 0);
+    str_cat(str1, "::", 2);
+    str_cat(str1, RSTRING(str2)->ptr, RSTRING(str2)->len);
+
+    return str1;
+}
+
+extern VALUE C_Kernel;
+
+Init_Assoc()
+{
+    C_Assoc  = rb_define_class("Assoc", C_Object);
+
+    rb_undef_method(CLASS_OF(C_Assoc), "new");
+    rb_undef_method(C_Assoc, "clone");
+
+    rb_define_method(C_Assoc, "car", Fassoc_car, 0);
+    rb_define_method(C_Assoc, "cdr", Fassoc_cdr, 0);
+
+    rb_define_method(C_Assoc, "car=", Fassoc_set_car, 1);
+    rb_define_method(C_Assoc, "cdr=", Fassoc_set_cdr, 1);
+
+    rb_define_method(C_Assoc, "==", Fassoc_equal, 1);
+    rb_define_method(C_Assoc, "hash", Fassoc_hash, 0);
+
+    rb_define_method(C_Assoc, "to_s", Fassoc_to_s, 0);
+    rb_define_method(C_Assoc, "_inspect", Fassoc_inspect, 0);
+
+    rb_define_method(C_Kernel, "::", assoc_new, 1);
+}