added tag v1_9_0_4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1803 insertions, 0 deletions

diff --git a/trunk/ext/tk/tkutil/tkutil.c b/trunk/ext/tk/tkutil/tkutil.c
new file mode 100644
index 0000000000..8155bff5ce
--- /dev/null
+++ b/trunk/ext/tk/tkutil/tkutil.c
@@ -0,0 +1,1803 @@
+/************************************************
+
+  tkutil.c -
+
+  $Author$
+  created at: Fri Nov  3 00:47:54 JST 1995
+
+************************************************/
+
+#define TKUTIL_RELEASE_DATE "2008-05-23"
+
+#include "ruby.h"
+
+#ifdef HAVE_RUBY_SIGNAL_H
+#include "ruby/signal.h"
+#else
+#include "rubysig.h"
+#endif
+#ifdef HAVE_RUBY_ST_H
+#include "ruby/st.h"
+#else
+#include "st.h"
+#endif
+
+static VALUE cMethod;
+
+static VALUE cTclTkLib;
+
+static VALUE cTkObject;
+static VALUE cTkCallbackEntry;
+
+static VALUE TK_None;
+
+static VALUE cCB_SUBST;
+static VALUE cSUBST_INFO;
+
+static VALUE ENCODING_NAME_UTF8; /* for saving GC cost */
+
+static ID ID_split_tklist;
+static ID ID_toUTF8;
+static ID ID_fromUTF8;
+static ID ID_path;
+static ID ID_at_path;
+static ID ID_at_enc;
+static ID ID_to_eval;
+static ID ID_to_s;
+static ID ID_source;
+static ID ID_downcase;
+static ID ID_install_cmd;
+static ID ID_merge_tklist;
+static ID ID_encoding;
+static ID ID_encoding_system;
+static ID ID_call;
+
+static ID ID_SUBST_INFO;
+
+static VALUE CALLBACK_TABLE;
+static unsigned long CALLBACK_ID_NUM = 0;
+
+/*************************************/
+
+static VALUE
+tk_s_new(argc, argv, klass)
+    int argc;
+    VALUE *argv;
+    VALUE klass;
+{
+    VALUE obj = rb_class_new_instance(argc, argv, klass);
+
+    if (rb_block_given_p()) {
+#ifndef HAVE_RB_OBJ_INSTANCE_EXEC
+      rb_obj_instance_eval(0, 0, obj);
+#else
+      rb_obj_instance_exec(1, &obj, obj);
+#endif
+    }
+    return obj;
+}
+
+/*************************************/
+
+static VALUE
+tkNone_to_s(self)
+    VALUE self;
+{
+    return rb_str_new2("None");
+}
+
+/*************************************/
+
+static VALUE
+tk_eval_cmd(argc, argv, self)
+    int argc;
+    VALUE argv[];
+    VALUE self;
+{
+    volatile VALUE cmd, rest;
+
+    rb_scan_args(argc, argv, "1*", &cmd, &rest);
+    return rb_eval_cmd(cmd, rest, 0);
+}
+
+static VALUE
+tk_do_callback(argc, argv, self)
+    int   argc;
+    VALUE *argv;
+    VALUE self;
+{
+#if 0
+    volatile VALUE id;
+    volatile VALUE rest;
+
+    rb_scan_args(argc, argv, "1*", &id, &rest);
+    return rb_apply(rb_hash_aref(CALLBACK_TABLE, id), ID_call, rest);
+#endif
+    return rb_funcall2(rb_hash_aref(CALLBACK_TABLE, argv[0]), 
+                       ID_call, argc - 1, argv + 1);
+}
+
+static const char cmd_id_head[] = "ruby_cmd TkUtil callback ";
+static const char cmd_id_prefix[] = "cmd";
+
+static VALUE
+tk_install_cmd_core(cmd)
+    VALUE cmd;
+{
+    volatile VALUE id_num;
+
+    id_num = ULONG2NUM(CALLBACK_ID_NUM++);
+    id_num = rb_funcall(id_num, ID_to_s, 0, 0);
+    id_num = rb_str_append(rb_str_new2(cmd_id_prefix), id_num);
+    rb_hash_aset(CALLBACK_TABLE, id_num, cmd);
+    return rb_str_append(rb_str_new2(cmd_id_head), id_num);
+}
+
+static VALUE
+tk_install_cmd(argc, argv, self)
+    int   argc;
+    VALUE *argv;
+    VALUE self;
+{
+    volatile VALUE cmd;
+
+#if 0
+    if (rb_scan_args(argc, argv, "01", &cmd) == 0) {
+        cmd = rb_block_proc();
+    }
+    return tk_install_cmd_core(cmd);
+#endif
+    if (argc == 0) {
+        cmd = rb_block_proc();
+    } else {
+        cmd = argv[0];
+    }
+    return tk_install_cmd_core(cmd);
+}
+
+static VALUE
+tk_uninstall_cmd(self, cmd_id)
+    VALUE self;
+    VALUE cmd_id;
+{
+    int head_len = strlen(cmd_id_head);
+    int prefix_len = strlen(cmd_id_prefix);
+
+    StringValue(cmd_id);
+    if (strncmp(cmd_id_head, RSTRING_PTR(cmd_id), head_len) != 0) {
+        return Qnil;
+    }
+    if (strncmp(cmd_id_prefix, 
+                RSTRING_PTR(cmd_id) + head_len, prefix_len) != 0) {
+        return Qnil;
+    }
+
+    return rb_hash_delete(CALLBACK_TABLE, 
+                          rb_str_new2(RSTRING_PTR(cmd_id) + head_len));
+}
+
+static VALUE
+tk_toUTF8(argc, argv, self)
+    int   argc;
+    VALUE *argv;
+    VALUE self;
+{
+    return rb_funcall2(cTclTkLib, ID_toUTF8, argc, argv);
+}
+
+static VALUE
+tk_fromUTF8(argc, argv, self)
+    int   argc;
+    VALUE *argv;
+    VALUE self;
+{
+    return rb_funcall2(cTclTkLib, ID_fromUTF8, argc, argv);
+}
+
+static VALUE
+fromDefaultEnc_toUTF8(str, self)
+    VALUE str;
+    VALUE self;
+{
+    VALUE argv[1];
+
+    argv[0] = str;
+    return tk_toUTF8(1, argv, self);
+}
+
+#if 0
+static VALUE
+fromUTF8_toDefaultEnc(str, self)
+    VALUE str;
+    VALUE self;
+{
+    VALUE argv[1];
+
+    argv[0] = str;
+    return tk_fromUTF8(1, argv, self);
+}
+#endif
+
+static int
+to_strkey(key, value, hash)
+    VALUE key;
+    VALUE value;
+    VALUE hash;
+{
+    if (key == Qundef) return ST_CONTINUE;
+    rb_hash_aset(hash, rb_funcall(key, ID_to_s, 0, 0), value);
+    return ST_CHECK;
+}
+
+static VALUE
+tk_symbolkey2str(self, keys)
+    VALUE self;
+    VALUE keys;
+{
+    volatile VALUE new_keys = rb_hash_new();
+
+    if NIL_P(keys) return new_keys;
+    keys = rb_convert_type(keys, T_HASH, "Hash", "to_hash");
+    st_foreach(RHASH_TBL(keys), to_strkey, new_keys);
+    return new_keys;
+}
+
+static VALUE get_eval_string_core _((VALUE, VALUE, VALUE));
+static VALUE ary2list _((VALUE, VALUE, VALUE));
+static VALUE ary2list2 _((VALUE, VALUE, VALUE));
+static VALUE hash2list _((VALUE, VALUE));
+static VALUE hash2list_enc _((VALUE, VALUE));
+static VALUE hash2kv _((VALUE, VALUE, VALUE));
+static VALUE hash2kv_enc _((VALUE, VALUE, VALUE));
+
+static VALUE
+ary2list(ary, enc_flag, self)
+    VALUE ary;
+    VALUE enc_flag;
+    VALUE self;
+{
+    int idx, idx2, size, size2, req_chk_flag;
+    volatile VALUE val, val2, str_val;
+    volatile VALUE dst;
+    volatile VALUE sys_enc, dst_enc, str_enc;
+
+    sys_enc = rb_funcall(cTclTkLib, ID_encoding, 0, 0);
+    if (NIL_P(sys_enc)) {
+      sys_enc = rb_funcall(cTclTkLib, ID_encoding_system, 0, 0);
+      sys_enc = rb_funcall(sys_enc, ID_to_s, 0, 0);
+    }
+
+    if NIL_P(enc_flag) {
+        dst_enc = sys_enc;
+        req_chk_flag = 1;
+    } else if (TYPE(enc_flag) == T_TRUE || TYPE(enc_flag) == T_FALSE) {
+        dst_enc = enc_flag;
+        req_chk_flag = 0;
+    } else {
+        dst_enc = rb_funcall(enc_flag, ID_to_s, 0, 0);
+        req_chk_flag = 0;
+    }
+
+    /* size = RARRAY_LEN(ary); */
+    size = 0;
+    for(idx = 0; idx < RARRAY_LEN(ary); idx++) {
+        if (TYPE(RARRAY_PTR(ary)[idx]) == T_HASH) {
+            size += 2 * RHASH_SIZE(RARRAY_PTR(ary)[idx]);
+        } else {
+            size++;
+        }
+    }
+
+    dst = rb_ary_new2(size);
+    for(idx = 0; idx < RARRAY_LEN(ary); idx++) {
+        val = RARRAY_PTR(ary)[idx];
+        str_val = Qnil;
+        switch(TYPE(val)) {
+        case T_ARRAY:
+            str_val = ary2list(val, enc_flag, self);
+            rb_ary_push(dst, str_val);
+
+            if (req_chk_flag) {
+                str_enc = rb_ivar_get(str_val, ID_at_enc);
+                if (!NIL_P(str_enc)) {
+                    str_enc = rb_funcall(str_enc, ID_to_s, 0, 0);
+                } else {
+                    str_enc = sys_enc;
+                }
+                if (!rb_str_cmp(str_enc, dst_enc)) {
+                    dst_enc = Qtrue;
+                    req_chk_flag = 0;
+                }
+            }
+
+            break;
+
+        case T_HASH:
+	    /* rb_ary_push(dst, hash2list(val, self)); */
+            if (RTEST(enc_flag)) {
+                val = hash2kv_enc(val, Qnil, self);
+            } else {
+                val = hash2kv(val, Qnil, self);
+            }
+            size2 = RARRAY_LEN(val);
+            for(idx2 = 0; idx2 < size2; idx2++) {
+                val2 = RARRAY_PTR(val)[idx2];
+                switch(TYPE(val2)) {
+                case T_ARRAY:
+                    str_val = ary2list(val2, enc_flag, self);
+                    rb_ary_push(dst, str_val);
+                    break;
+
+                case T_HASH:
+                    if (RTEST(enc_flag)) {
+                        str_val = hash2list_enc(val2, self);
+                    } else {
+                        str_val = hash2list(val2, self);
+                    }
+                    rb_ary_push(dst, str_val);
+                    break;
+
+                default:
+                    if (val2 != TK_None) {
+                        str_val = get_eval_string_core(val2, enc_flag, self);
+                        rb_ary_push(dst, str_val);
+                    }
+                }
+
+                if (req_chk_flag) {
+                    str_enc = rb_ivar_get(str_val, ID_at_enc);
+                    if (!NIL_P(str_enc)) {
+                        str_enc = rb_funcall(str_enc, ID_to_s, 0, 0);
+                    } else {
+                        str_enc = sys_enc;
+                    }
+                    if (!rb_str_cmp(str_enc, dst_enc)) {
+                        dst_enc = Qtrue;
+                        req_chk_flag = 0;
+                    }
+                }
+            }
+            break;
+
+        default:
+            if (val != TK_None) {
+                str_val = get_eval_string_core(val, enc_flag, self);
+                rb_ary_push(dst, str_val);
+
+                if (req_chk_flag) {
+                    str_enc = rb_ivar_get(str_val, ID_at_enc);
+                    if (!NIL_P(str_enc)) {
+                        str_enc = rb_funcall(str_enc, ID_to_s, 0, 0);
+                    } else {
+                        str_enc = sys_enc;
+                    }
+                    if (!rb_str_cmp(str_enc, dst_enc)) {
+                        dst_enc = Qtrue;
+                        req_chk_flag = 0;
+                    }
+                }
+            }
+        }
+    }
+
+    if (RTEST(dst_enc) && !NIL_P(sys_enc)) {
+        for(idx = 0; idx < RARRAY_LEN(dst); idx++) {
+            str_val = RARRAY_PTR(dst)[idx];
+            if (rb_obj_respond_to(self, ID_toUTF8, Qtrue)) {
+                str_val = rb_funcall(self, ID_toUTF8, 1, str_val);
+            } else {
+                str_val = rb_funcall(cTclTkLib, ID_toUTF8, 1, str_val);
+            }
+            RARRAY_PTR(dst)[idx] = str_val;
+        }
+        val = rb_apply(cTclTkLib, ID_merge_tklist, dst);
+        if (TYPE(dst_enc) == T_STRING) {
+            val = rb_funcall(cTclTkLib, ID_fromUTF8, 2, val, dst_enc);
+            rb_ivar_set(val, ID_at_enc, dst_enc);
+        } else {
+            rb_ivar_set(val, ID_at_enc, ENCODING_NAME_UTF8);
+        }
+        return val;
+    } else {
+        return rb_apply(cTclTkLib, ID_merge_tklist, dst);
+    }
+}
+
+static VALUE
+ary2list2(ary, enc_flag, self)
+    VALUE ary;
+    VALUE enc_flag;
+    VALUE self;
+{
+    int idx, size, req_chk_flag;
+    volatile VALUE val, str_val;
+    volatile VALUE dst;
+    volatile VALUE sys_enc, dst_enc, str_enc;
+
+    sys_enc = rb_funcall(cTclTkLib, ID_encoding, 0, 0);
+    if NIL_P(sys_enc) {
+      sys_enc = rb_funcall(cTclTkLib, ID_encoding_system, 0, 0);
+      sys_enc = rb_funcall(sys_enc, ID_to_s, 0, 0);
+    }
+
+    if NIL_P(enc_flag) {
+        dst_enc = sys_enc;
+        req_chk_flag = 1;
+    } else if (TYPE(enc_flag) == T_TRUE || TYPE(enc_flag) == T_FALSE) {
+        dst_enc = enc_flag;
+        req_chk_flag = 0;
+    } else {
+        dst_enc = rb_funcall(enc_flag, ID_to_s, 0, 0);
+        req_chk_flag = 0;
+    }
+
+    size = RARRAY_LEN(ary);
+    dst = rb_ary_new2(size);
+    for(idx = 0; idx < RARRAY_LEN(ary); idx++) {
+        val = RARRAY_PTR(ary)[idx];
+        str_val = Qnil;
+        switch(TYPE(val)) {
+        case T_ARRAY:
+            str_val = ary2list(val, enc_flag, self);
+            break;
+
+        case T_HASH:
+            if (RTEST(enc_flag)) {
+                str_val = hash2list(val, self);
+            } else {
+                str_val = hash2list_enc(val, self);
+            }
+            break;
+
+        default:
+            if (val != TK_None) {
+                str_val = get_eval_string_core(val, enc_flag, self);
+            }
+        }
+
+        if (!NIL_P(str_val)) {
+            rb_ary_push(dst, str_val);
+
+            if (req_chk_flag) {
+                str_enc = rb_ivar_get(str_val, ID_at_enc);
+                if (!NIL_P(str_enc)) {
+                    str_enc = rb_funcall(str_enc, ID_to_s, 0, 0);
+                } else {
+                    str_enc = sys_enc;
+                }
+                if (!rb_str_cmp(str_enc, dst_enc)) {
+                    dst_enc = Qtrue;
+                    req_chk_flag = 0;
+                }
+            }
+        }
+    }
+
+    if (RTEST(dst_enc) && !NIL_P(sys_enc)) {
+        for(idx = 0; idx < RARRAY_LEN(dst); idx++) {
+            str_val = RARRAY_PTR(dst)[idx];
+            if (rb_obj_respond_to(self, ID_toUTF8, Qtrue)) {
+                str_val = rb_funcall(self, ID_toUTF8, 1, str_val);
+            } else {
+                str_val = rb_funcall(cTclTkLib, ID_toUTF8, 1, str_val);
+            }
+            RARRAY_PTR(dst)[idx] = str_val;
+        }
+        val = rb_apply(cTclTkLib, ID_merge_tklist, dst);
+        if (TYPE(dst_enc) == T_STRING) {
+            val = rb_funcall(cTclTkLib, ID_fromUTF8, 2, val, dst_enc);
+            rb_ivar_set(val, ID_at_enc, dst_enc);
+        } else {
+            rb_ivar_set(val, ID_at_enc, ENCODING_NAME_UTF8);
+        }
+        return val;
+    } else {
+        return rb_apply(cTclTkLib, ID_merge_tklist, dst);
+    }
+}
+
+static VALUE
+key2keyname(key)
+    VALUE key;
+{
+    return rb_str_append(rb_str_new2("-"), rb_funcall(key, ID_to_s, 0, 0));
+}
+
+static VALUE
+assoc2kv(assoc, ary, self)
+    VALUE assoc;
+    VALUE ary;
+    VALUE self;
+{
+    int i, j, len;
+    volatile VALUE pair;
+    volatile VALUE val;
+    volatile VALUE dst = rb_ary_new2(2 * RARRAY_LEN(assoc));
+
+    len = RARRAY_LEN(assoc);
+
+    for(i = 0; i < len; i++) {
+        pair = RARRAY_PTR(assoc)[i];
+        if (TYPE(pair) != T_ARRAY) {
+            rb_ary_push(dst, key2keyname(pair));
+            continue;
+        }
+        switch(RARRAY_LEN(assoc)) {
+        case 2:
+            rb_ary_push(dst, RARRAY_PTR(pair)[2]);
+
+        case 1:
+            rb_ary_push(dst, key2keyname(RARRAY_PTR(pair)[0]));
+
+        case 0:
+            continue;
+
+        default:
+            rb_ary_push(dst, key2keyname(RARRAY_PTR(pair)[0]));
+
+            val = rb_ary_new2(RARRAY_LEN(pair) - 1);
+            for(j = 1; j < RARRAY_LEN(pair); j++) {
+                rb_ary_push(val, RARRAY_PTR(pair)[j]);
+            }
+
+            rb_ary_push(dst, val);
+        }
+    }
+
+    if (NIL_P(ary)) {
+        return dst;
+    } else {
+        return rb_ary_plus(ary, dst);
+    }
+}
+
+static VALUE
+assoc2kv_enc(assoc, ary, self)
+    VALUE assoc;
+    VALUE ary;
+    VALUE self;
+{
+    int i, j, len;
+    volatile VALUE pair;
+    volatile VALUE val;
+    volatile VALUE dst = rb_ary_new2(2 * RARRAY_LEN(assoc));
+
+    len = RARRAY_LEN(assoc);
+
+    for(i = 0; i < len; i++) {
+        pair = RARRAY_PTR(assoc)[i];
+        if (TYPE(pair) != T_ARRAY) {
+            rb_ary_push(dst, key2keyname(pair));
+            continue;
+        }
+        switch(RARRAY_LEN(assoc)) {
+        case 2:
+            rb_ary_push(dst, get_eval_string_core(RARRAY_PTR(pair)[2], Qtrue, self));
+
+        case 1:
+            rb_ary_push(dst, key2keyname(RARRAY_PTR(pair)[0]));
+
+        case 0:
+            continue;
+
+        default:
+            rb_ary_push(dst, key2keyname(RARRAY_PTR(pair)[0]));
+
+            val = rb_ary_new2(RARRAY_LEN(pair) - 1);
+            for(j = 1; j < RARRAY_LEN(pair); j++) {
+                rb_ary_push(val, RARRAY_PTR(pair)[j]);
+            }
+
+            rb_ary_push(dst, get_eval_string_core(val, Qtrue, self));
+        }
+    }
+
+    if (NIL_P(ary)) {
+        return dst;
+    } else {
+        return rb_ary_plus(ary, dst);
+    }
+}
+
+static int
+push_kv(key, val, args)
+    VALUE key;
+    VALUE val;
+    VALUE args;
+{
+    volatile VALUE ary;
+
+    ary = RARRAY_PTR(args)[0];
+
+    if (key == Qundef) return ST_CONTINUE;
+#if 0
+    rb_ary_push(ary, key2keyname(key));
+    if (val != TK_None) rb_ary_push(ary, val);
+#endif
+    rb_ary_push(ary, key2keyname(key));
+
+    if (val == TK_None) return ST_CHECK;
+
+    rb_ary_push(ary, get_eval_string_core(val, Qnil, RARRAY_PTR(args)[1]));
+
+    return ST_CHECK;
+}
+
+static VALUE
+hash2kv(hash, ary, self)
+    VALUE hash;
+    VALUE ary;
+    VALUE self;
+{
+    volatile VALUE dst = rb_ary_new2(2 * RHASH_SIZE(hash));
+    volatile VALUE args = rb_ary_new3(2, dst, self);
+
+    st_foreach(RHASH_TBL(hash), push_kv, args);
+
+    if (NIL_P(ary)) {
+        return dst;
+    } else {
+        return rb_ary_concat(ary, dst);
+    }
+}
+
+static int
+push_kv_enc(key, val, args)
+    VALUE key;
+    VALUE val;
+    VALUE args;
+{
+    volatile VALUE ary;
+
+    ary = RARRAY_PTR(args)[0];
+
+    if (key == Qundef) return ST_CONTINUE;
+#if 0
+    rb_ary_push(ary, key2keyname(key));
+    if (val != TK_None) {
+        rb_ary_push(ary, get_eval_string_core(val, Qtrue, 
+                                              RARRAY_PTR(args)[1]));
+    }
+#endif
+    rb_ary_push(ary, key2keyname(key));
+
+    if (val == TK_None) return ST_CHECK;
+
+    rb_ary_push(ary, get_eval_string_core(val, Qtrue, RARRAY_PTR(args)[1]));
+
+    return ST_CHECK;
+}
+
+static VALUE
+hash2kv_enc(hash, ary, self)
+    VALUE hash;
+    VALUE ary;
+    VALUE self;
+{
+    volatile VALUE dst = rb_ary_new2(2 * RHASH_SIZE(hash));
+    volatile VALUE args = rb_ary_new3(2, dst, self);
+
+    st_foreach(RHASH_TBL(hash), push_kv_enc, args);
+
+    if (NIL_P(ary)) {
+        return dst;
+    } else {
+        return rb_ary_concat(ary, dst);
+    }
+}
+
+static VALUE
+hash2list(hash, self)
+    VALUE hash;
+    VALUE self;
+{
+    return ary2list2(hash2kv(hash, Qnil, self), Qfalse, self);
+}
+
+
+static VALUE
+hash2list_enc(hash, self)
+    VALUE hash;
+    VALUE self;
+{
+    return ary2list2(hash2kv_enc(hash, Qnil, self), Qfalse, self);
+}
+
+static VALUE
+tk_hash_kv(argc, argv, self)
+    int   argc;
+    VALUE *argv;
+    VALUE self;
+{
+    volatile VALUE hash, enc_flag, ary;
+
+    ary = Qnil;
+    enc_flag = Qnil;
+    switch(argc) {
+    case 3:
+        ary = argv[2];
+    case 2:
+        enc_flag = argv[1];
+    case 1:
+        hash = argv[0];
+        break;
+    case 0:
+        rb_raise(rb_eArgError, "too few arguments");
+    default: /* >= 3 */
+        rb_raise(rb_eArgError, "too many arguments");
+    }
+
+    switch(TYPE(hash)) {
+    case T_ARRAY:
+        if (RTEST(enc_flag)) {
+            return assoc2kv_enc(hash, ary, self);
+        } else {
+            return assoc2kv(hash, ary, self);
+        }
+
+    case T_HASH:
+        if (RTEST(enc_flag)) {
+            return hash2kv_enc(hash, ary, self);
+        } else {
+            return hash2kv(hash, ary, self);
+        }
+
+    case T_NIL:
+        if (NIL_P(ary)) {
+            return rb_ary_new();
+        } else {
+            return ary;
+        }
+
+    default:
+        if (hash == TK_None) {
+            if (NIL_P(ary)) {
+                return rb_ary_new();
+            } else {
+                return ary;
+            }
+        }
+        rb_raise(rb_eArgError, "Hash is expected for 1st argument");
+    }
+}
+
+static VALUE
+get_eval_string_core(obj, enc_flag, self)
+    VALUE obj;
+    VALUE enc_flag;
+    VALUE self;
+{
+    switch(TYPE(obj)) {
+    case T_FLOAT:
+    case T_FIXNUM:
+    case T_BIGNUM:
+        return rb_funcall(obj, ID_to_s, 0, 0);
+
+    case T_STRING:
+        if (RTEST(enc_flag)) {
+            if (rb_obj_respond_to(self, ID_toUTF8, Qtrue)) {
+                return rb_funcall(self, ID_toUTF8, 1, obj);
+            } else {
+                return fromDefaultEnc_toUTF8(obj, self);
+            }
+        } else {
+            return obj;
+        }
+
+    case T_SYMBOL:
+        if (RTEST(enc_flag)) {
+            if (rb_obj_respond_to(self, ID_toUTF8, Qtrue)) {
+                return rb_funcall(self, ID_toUTF8, 1, 
+                                  rb_str_new2(rb_id2name(SYM2ID(obj))));
+            } else {
+                return fromDefaultEnc_toUTF8(rb_str_new2(rb_id2name(SYM2ID(obj))), self);
+            }
+        } else {
+#ifdef HAVE_RB_SYM_TO_S
+            return rb_sym_to_s(obj);
+#else
+            return rb_str_new2(rb_id2name(SYM2ID(obj)));
+#endif
+        }
+
+    case T_HASH:
+        if (RTEST(enc_flag)) {
+            return hash2list_enc(obj, self);
+        } else {
+            return hash2list(obj, self);
+        }
+
+    case T_ARRAY:
+        return ary2list(obj, enc_flag, self);
+
+    case T_FALSE:
+        return rb_str_new2("0");
+
+    case T_TRUE:
+        return rb_str_new2("1");
+
+    case T_NIL:
+        return rb_str_new2("");
+
+    case T_REGEXP:
+        return rb_funcall(obj, ID_source, 0, 0);
+
+    default:
+        if (rb_obj_is_kind_of(obj, cTkObject)) {
+            /* return rb_str_new3(rb_funcall(obj, ID_path, 0, 0)); */
+            return get_eval_string_core(rb_funcall(obj, ID_path, 0, 0), 
+                                        enc_flag, self);
+        }
+
+        if (rb_obj_is_kind_of(obj, rb_cProc)
+            || rb_obj_is_kind_of(obj, cMethod)
+            || rb_obj_is_kind_of(obj, cTkCallbackEntry)) {
+            if (rb_obj_respond_to(self, ID_install_cmd, Qtrue)) {
+                return rb_funcall(self, ID_install_cmd, 1, obj);
+            } else {
+                return tk_install_cmd_core(obj);
+            }
+        }
+
+        if (obj == TK_None)  return Qnil;
+
+        if (rb_obj_respond_to(obj, ID_to_eval, Qtrue)) {
+            /* return rb_funcall(obj, ID_to_eval, 0, 0); */
+            return get_eval_string_core(rb_funcall(obj, ID_to_eval, 0, 0), 
+                                        enc_flag, self);
+        } else if (rb_obj_respond_to(obj, ID_path, Qtrue)) {
+            /* return rb_funcall(obj, ID_path, 0, 0); */
+            return get_eval_string_core(rb_funcall(obj, ID_path, 0, 0), 
+                                        enc_flag, self);
+        } else if (rb_obj_respond_to(obj, ID_to_s, Qtrue)) {
+            return rb_funcall(obj, ID_to_s, 0, 0);
+        }
+    }
+
+    rb_warning("fail to convert '%s' to string for Tk", 
+               RSTRING_PTR(rb_funcall(obj, rb_intern("inspect"), 0, 0)));
+
+    return obj;
+}
+
+static VALUE
+tk_get_eval_string(argc, argv, self)
+    int   argc;
+    VALUE *argv;
+    VALUE self;
+{
+    volatile VALUE obj, enc_flag;
+
+    if (rb_scan_args(argc, argv, "11", &obj, &enc_flag) == 1) {
+        enc_flag = Qnil;
+    }
+
+    return get_eval_string_core(obj, enc_flag, self);
+}
+
+static VALUE
+tk_get_eval_enc_str(self, obj)
+    VALUE self;
+    VALUE obj;
+{
+    if (obj == TK_None) {
+        return obj;
+    } else {
+        return get_eval_string_core(obj, Qtrue, self);
+    }
+}
+
+static VALUE
+tk_conv_args(argc, argv, self)
+    int   argc;
+    VALUE *argv; /* [0]:base_array, [1]:enc_mode, [2]..[n]:args */
+    VALUE self;
+{
+    int idx, size;
+    volatile VALUE dst;
+    int thr_crit_bup;
+    VALUE old_gc;
+
+    if (argc < 2) {
+      rb_raise(rb_eArgError, "too few arguments");
+    }
+
+    thr_crit_bup = rb_thread_critical;
+    rb_thread_critical = Qtrue;
+    old_gc = rb_gc_disable();
+
+    for(size = 0, idx = 2; idx < argc; idx++) {
+        if (TYPE(argv[idx]) == T_HASH) {
+            size += 2 * RHASH_SIZE(argv[idx]);
+        } else {
+            size++;
+        }
+    }
+    /* dst = rb_ary_new2(argc - 2); */
+    dst = rb_ary_new2(size);
+    for(idx = 2; idx < argc; idx++) {
+        if (TYPE(argv[idx]) == T_HASH) {
+            if (RTEST(argv[1])) {
+                hash2kv_enc(argv[idx], dst, self);
+            } else {
+                hash2kv(argv[idx], dst, self);
+            }
+        } else if (argv[idx] != TK_None) {
+            rb_ary_push(dst, get_eval_string_core(argv[idx], argv[1], self));
+        }
+    }
+
+    if (old_gc == Qfalse) rb_gc_enable();
+    rb_thread_critical = thr_crit_bup;
+
+    return rb_ary_plus(argv[0], dst);
+}
+
+
+/*************************************/
+
+static VALUE
+tcl2rb_bool(self, value)
+    VALUE self;
+    VALUE value;
+{
+    if (TYPE(value) == T_FIXNUM) {
+        if (NUM2INT(value) == 0) {
+            return Qfalse;
+        } else {
+            return Qtrue;
+        }
+    }
+
+    if (TYPE(value) == T_TRUE || TYPE(value) == T_FALSE) {
+        return value;
+    }
+
+    rb_check_type(value, T_STRING);
+
+    value = rb_funcall(value, ID_downcase, 0);
+
+    if (RSTRING_PTR(value) == (char*)NULL) return Qnil;
+
+    if (RSTRING_PTR(value)[0] == '\0'
+        || strcmp(RSTRING_PTR(value), "0") == 0
+        || strcmp(RSTRING_PTR(value), "no") == 0
+        || strcmp(RSTRING_PTR(value), "off") == 0
+        || strcmp(RSTRING_PTR(value), "false") == 0) {
+        return Qfalse;
+    } else {
+        return Qtrue;
+    }
+}
+
+#if 0
+static VALUE
+tkstr_to_dec(value)
+    VALUE value;
+{
+    return rb_cstr_to_inum(RSTRING_PTR(value), 10, 1);
+}
+#endif
+
+static VALUE
+tkstr_to_int(value)
+    VALUE value;
+{
+    return rb_cstr_to_inum(RSTRING_PTR(value), 0, 1);
+}
+
+static VALUE
+tkstr_to_float(value)
+    VALUE value;
+{
+    return rb_float_new(rb_cstr_to_dbl(RSTRING_PTR(value), 1));
+}
+
+static VALUE
+tkstr_invalid_numstr(value)
+    VALUE value;
+{
+    rb_raise(rb_eArgError, 
+             "invalid value for Number: '%s'", RSTRING_PTR(value));
+    return Qnil; /*dummy*/
+}
+
+static VALUE
+tkstr_rescue_float(value)
+    VALUE value;
+{
+    return rb_rescue2(tkstr_to_float, value, 
+                      tkstr_invalid_numstr, value, 
+                      rb_eArgError, 0);
+}
+
+static VALUE
+tkstr_to_number(value)
+    VALUE value;
+{
+    rb_check_type(value, T_STRING);
+
+    if (RSTRING_PTR(value) == (char*)NULL) return INT2FIX(0);
+
+    return rb_rescue2(tkstr_to_int, value, 
+                      tkstr_rescue_float, value, 
+                      rb_eArgError, 0);
+}
+
+static VALUE
+tcl2rb_number(self, value)
+    VALUE self;
+    VALUE value;
+{
+    return tkstr_to_number(value);
+}
+
+static VALUE
+tkstr_to_str(value)
+    VALUE value;
+{
+    char * ptr;
+    int len;
+
+    ptr = RSTRING_PTR(value);
+    len = RSTRING_LEN(value);
+
+    if (len > 1 && *ptr == '{' && *(ptr + len - 1) == '}') {
+        return rb_str_new(ptr + 1, len - 2);
+    }
+    return value;
+}
+
+static VALUE
+tcl2rb_string(self, value)
+    VALUE self;
+    VALUE value;
+{
+    rb_check_type(value, T_STRING);
+
+    if (RSTRING_PTR(value) == (char*)NULL) return rb_tainted_str_new2("");
+
+    return tkstr_to_str(value);
+}
+
+static VALUE
+tcl2rb_num_or_str(self, value)
+    VALUE self;
+    VALUE value;
+{
+    rb_check_type(value, T_STRING);
+
+    if (RSTRING_PTR(value) == (char*)NULL) return rb_tainted_str_new2("");
+
+    return rb_rescue2(tkstr_to_number, value, 
+                      tkstr_to_str, value, 
+                      rb_eArgError, 0);
+}
+
+
+/*************************************/
+
+#define CBSUBST_TBL_MAX (256)
+struct cbsubst_info {
+    int   full_subst_length;
+    int   keylen[CBSUBST_TBL_MAX];
+    char  *key[CBSUBST_TBL_MAX];
+    char  type[CBSUBST_TBL_MAX];
+    ID    ivar[CBSUBST_TBL_MAX];
+    VALUE proc;
+    VALUE aliases;
+};
+
+static void
+subst_mark(ptr)
+    struct cbsubst_info *ptr;
+{
+    rb_gc_mark(ptr->proc);
+    rb_gc_mark(ptr->aliases);
+}
+
+static void
+subst_free(ptr)
+    struct cbsubst_info *ptr;
+{
+    int i;
+
+    if (ptr) {
+      for(i = 0; i < CBSUBST_TBL_MAX; i++) {
+	if (ptr->key[i] != NULL) {
+	  free(ptr->key[i]);
+	  ptr->key[i] = NULL;
+	}
+      }
+      free(ptr);
+    }
+}
+
+static struct cbsubst_info *
+allocate_cbsubst_info()
+{
+  struct cbsubst_info *inf;
+  volatile VALUE proc, aliases;
+  int idx;
+
+  inf = ALLOC(struct cbsubst_info);
+
+  inf->full_subst_length = 0;
+
+  for(idx = 0; idx < CBSUBST_TBL_MAX; idx++) {
+    inf->keylen[idx] = 0;
+    inf->key[idx]    = NULL;
+    inf->type[idx]   = '\0';
+    inf->ivar[idx]   = (ID) 0;
+  }
+
+  proc = rb_hash_new();
+  inf->proc = proc;
+
+  aliases = rb_hash_new();
+  inf->aliases = aliases;
+
+  return inf;
+}
+
+static void
+cbsubst_init()
+{
+    rb_const_set(cCB_SUBST, ID_SUBST_INFO, 
+		 Data_Wrap_Struct(cSUBST_INFO, subst_mark, subst_free, 
+				  allocate_cbsubst_info()));
+}
+
+static VALUE
+cbsubst_initialize(argc, argv, self)
+    int   argc;
+    VALUE *argv;
+    VALUE self;
+{
+    struct cbsubst_info *inf;
+    int idx, iv_idx;
+
+    Data_Get_Struct(rb_const_get(rb_obj_class(self), ID_SUBST_INFO), 
+                    struct cbsubst_info, inf);
+
+   idx = 0;
+    for(iv_idx = 0; iv_idx < CBSUBST_TBL_MAX; iv_idx++) {
+      if ( inf->ivar[iv_idx] == (ID) 0 ) continue;
+      rb_ivar_set(self, inf->ivar[iv_idx], argv[idx++]);
+      if (idx >= argc) break;
+    }
+
+    return self;
+}
+
+static VALUE
+cbsubst_ret_val(self, val)
+    VALUE self;
+    VALUE val;
+{
+    /* This method may be overwritten on some sub-classes.                  */
+    /* This method is used for converting from ruby's callback-return-value */
+    /* to tcl's value (e.g. validation procedure of entry widget).          */
+    return val;
+}
+
+static int
+each_attr_def(key, value, klass)
+    VALUE key, value, klass;
+{
+    ID key_id, value_id;
+
+    if (key == Qundef) return ST_CONTINUE;
+
+    switch(TYPE(key)) {
+    case T_STRING:
+        key_id = rb_intern(RSTRING_PTR(key));
+        break;
+    case T_SYMBOL:
+        key_id = SYM2ID(key);
+        break;
+    default:
+        rb_raise(rb_eArgError, 
+                 "includes invalid key(s). expected a String or a Symbol");
+    }
+
+    switch(TYPE(value)) {
+    case T_STRING:
+        value_id = rb_intern(RSTRING_PTR(value));
+        break;
+    case T_SYMBOL:
+        value_id = SYM2ID(value);
+        break;
+    default:
+        rb_raise(rb_eArgError, 
+                 "includes invalid value(s). expected a String or a Symbol");
+    }
+
+    rb_alias(klass, key_id, value_id);
+
+    return ST_CONTINUE;
+}
+
+static VALUE
+cbsubst_def_attr_aliases(self, tbl)
+    VALUE self;
+    VALUE tbl;
+{
+    struct cbsubst_info *inf;
+
+    if (TYPE(tbl) != T_HASH) {
+        rb_raise(rb_eArgError, "expected a Hash");
+    }
+
+    Data_Get_Struct(rb_const_get(self, ID_SUBST_INFO), 
+                    struct cbsubst_info, inf);
+
+    rb_hash_foreach(tbl, each_attr_def, self);
+
+    return rb_funcall(inf->aliases, rb_intern("update"), 1, tbl);
+}
+
+static VALUE
+cbsubst_sym_to_subst(self, sym)
+    VALUE self;
+    VALUE sym;
+{
+    struct cbsubst_info *inf;
+    const char *str;
+    char *buf, *ptr;
+    int idx, len;
+    ID id;
+    volatile VALUE ret;
+
+    if (TYPE(sym) != T_SYMBOL) return sym;
+
+    Data_Get_Struct(rb_const_get(self, ID_SUBST_INFO), 
+                    struct cbsubst_info, inf);
+
+    if (!NIL_P(ret = rb_hash_aref(inf->aliases, sym))) {
+      str = rb_id2name(SYM2ID(ret));
+    } else {
+      str = rb_id2name(SYM2ID(sym));
+    }
+
+    id = rb_intern(RSTRING_PTR(rb_str_cat2(rb_str_new2("@"), str)));
+
+    for(idx = 0; idx < CBSUBST_TBL_MAX; idx++) {
+      if (inf->ivar[idx] == id) break;
+    }
+    if (idx >= CBSUBST_TBL_MAX)  return sym;
+
+    ptr = buf = ALLOC_N(char, inf->full_subst_length + 1);
+
+    *(ptr++) = '%';
+
+    if (len = inf->keylen[idx]) {
+      /* longname */
+      strncpy(ptr, inf->key[idx], len);
+      ptr += len;
+    } else {
+      /* single char */
+      *(ptr++) = (unsigned char)idx;
+    }
+
+    *(ptr++) = ' ';
+    *(ptr++) = '\0';
+
+    ret = rb_str_new2(buf);
+
+    free(buf);
+
+    return ret;
+}
+
+static VALUE
+cbsubst_get_subst_arg(argc, argv, self)
+    int   argc;
+    VALUE *argv;
+    VALUE self;
+{
+    struct cbsubst_info *inf;
+    const char *str;
+    char *buf, *ptr;
+    int i, idx, len;
+    ID id;
+    volatile VALUE arg_sym, ret;
+
+    Data_Get_Struct(rb_const_get(self, ID_SUBST_INFO), 
+                    struct cbsubst_info, inf);
+
+    ptr = buf = ALLOC_N(char, inf->full_subst_length + 1);
+
+    for(i = 0; i < argc; i++) {
+        switch(TYPE(argv[i])) {
+        case T_STRING:
+            str = RSTRING_PTR(argv[i]);
+            arg_sym = ID2SYM(rb_intern(str));
+            break;
+        case T_SYMBOL:
+            arg_sym = argv[i];
+            str = rb_id2name(SYM2ID(arg_sym));
+            break;
+        default:
+            rb_raise(rb_eArgError, "arg #%d is not a String or a Symbol", i);
+        }
+
+        if (!NIL_P(ret = rb_hash_aref(inf->aliases, arg_sym))) {
+            str = rb_id2name(SYM2ID(ret));
+        }
+
+        id = rb_intern(RSTRING_PTR(rb_str_cat2(rb_str_new2("@"), str)));
+
+	for(idx = 0; idx < CBSUBST_TBL_MAX; idx++) {
+	  if (inf->ivar[idx] == id) break;
+	}
+        if (idx >= CBSUBST_TBL_MAX) {
+            rb_raise(rb_eArgError, "cannot find attribute :%s", str);
+        }
+
+	*(ptr++) = '%';
+
+	if (len = inf->keylen[idx]) {
+	  /* longname */
+	  strncpy(ptr, inf->key[idx], len);
+	  ptr += len;
+	} else {
+	  /* single char */
+	  *(ptr++) = (unsigned char)idx;
+	}
+
+	*(ptr++) = ' ';
+    }
+
+    *ptr = '\0';
+
+    ret = rb_str_new2(buf);
+
+    free(buf);
+
+    return ret;
+}
+
+static VALUE
+cbsubst_get_subst_key(self, str)
+    VALUE self;
+    VALUE str;
+{
+    struct cbsubst_info *inf;
+    volatile VALUE list;
+    volatile VALUE ret;
+    VALUE keyval;
+    int i, len, keylen, idx;
+    char *buf, *ptr, *key;
+
+    list = rb_funcall(cTclTkLib, ID_split_tklist, 1, str);
+    len = RARRAY_LEN(list);
+
+    Data_Get_Struct(rb_const_get(self, ID_SUBST_INFO), 
+                    struct cbsubst_info, inf);
+
+    ptr = buf = ALLOC_N(char, inf->full_subst_length + len + 1);
+
+    for(i = 0; i < len; i++) {
+      keyval = RARRAY_PTR(list)[i];
+      key = RSTRING_PTR(keyval);
+      if (*key == '%') {
+	if (*(key + 2) == '\0') {
+	  /* single char */
+	  *(ptr++) = *(key + 1);
+	} else {
+	  /* search longname-key */
+	  keylen = RSTRING_LEN(keyval) - 1;
+	  for(idx = 0; idx < CBSUBST_TBL_MAX; idx++) {
+	    if (inf->keylen[idx] != keylen) continue;
+	    if ((unsigned char)inf->key[idx][0] != (unsigned char)*(key + 1)) continue;
+	    if (strncmp(inf->key[idx], key + 1, keylen)) continue;
+	    break;
+	  }
+	  if (idx < CBSUBST_TBL_MAX) {
+	    *(ptr++) = (unsigned char)idx;
+	  } else {
+	    *(ptr++) = ' ';
+	  }
+	}
+      } else {
+	*(ptr++) = ' ';
+      }
+    }
+    *ptr = '\0';
+
+    ret = rb_str_new2(buf);
+    free(buf);
+    return ret;
+}
+
+static VALUE
+cbsubst_get_all_subst_keys(self)
+    VALUE self;
+{
+    struct cbsubst_info *inf;
+    char *buf, *ptr;
+    char *keys_buf, *keys_ptr;
+    int idx, len;
+    volatile VALUE ret;
+
+    Data_Get_Struct(rb_const_get(self, ID_SUBST_INFO), 
+                    struct cbsubst_info, inf);
+
+    ptr = buf = ALLOC_N(char, inf->full_subst_length + 1);
+    keys_ptr = keys_buf = ALLOC_N(char, CBSUBST_TBL_MAX + 1);
+
+    for(idx = 0; idx < CBSUBST_TBL_MAX; idx++) {
+      if (inf->ivar[idx] == (ID) 0) continue;
+
+      *(keys_ptr++) = (unsigned char)idx;
+
+      *(ptr++) = '%';
+
+      if (len = inf->keylen[idx]) {
+	/* longname */
+	strncpy(ptr, inf->key[idx], len);
+	ptr += len;
+      } else {
+	/* single char */
+	*(ptr++) = (unsigned char)idx;
+      }
+
+      *(ptr++) = ' ';
+    }
+
+    *ptr = '\0';
+    *keys_ptr = '\0';
+
+    ret = rb_ary_new3(2, rb_str_new2(keys_buf), rb_str_new2(buf));
+
+    free(buf);
+    free(keys_buf);
+
+    return ret;
+}
+
+static VALUE
+cbsubst_table_setup(argc, argv, self)
+     int   argc;
+     VALUE *argv;
+     VALUE self;
+{
+  volatile VALUE key_inf;
+  volatile VALUE longkey_inf;
+  volatile VALUE proc_inf;
+  VALUE inf;
+  ID id;
+  struct cbsubst_info *subst_inf;
+  int idx, len;
+  unsigned char chr;
+
+  /* accept (key_inf, proc_inf) or (key_inf, longkey_inf, procinf) */
+  if (rb_scan_args(argc, argv, "21", &key_inf, &longkey_inf, &proc_inf) == 2) {
+    proc_inf = longkey_inf;
+    longkey_inf = rb_ary_new();
+  }
+
+  /* check the number of longkeys */
+  if (RARRAY_LEN(longkey_inf) > 125 /* from 0x80 to 0xFD */) {
+    rb_raise(rb_eArgError, "too many longname-key definitions");
+  }
+
+  /* init */
+  subst_inf = allocate_cbsubst_info();
+
+  /*
+   * keys : array of [subst, type, ivar]
+   *         subst ==> char code or string
+   *         type  ==> char code or string
+   *         ivar  ==> symbol
+   */
+  len = RARRAY_LEN(key_inf);
+  for(idx = 0; idx < len; idx++) {
+    inf = RARRAY_PTR(key_inf)[idx];
+    if (TYPE(inf) != T_ARRAY) continue;
+
+    if (TYPE(RARRAY_PTR(inf)[0]) == T_STRING) {
+      chr = *(RSTRING_PTR(RARRAY_PTR(inf)[0]));
+    } else {
+      chr = NUM2CHR(RARRAY_PTR(inf)[0]);
+    }
+    if (TYPE(RARRAY_PTR(inf)[1]) == T_STRING) {
+      subst_inf->type[chr] = *(RSTRING_PTR(RARRAY_PTR(inf)[1]));
+    } else {
+      subst_inf->type[chr] = NUM2CHR(RARRAY_PTR(inf)[1]);
+    }
+
+    subst_inf->full_subst_length += 3;
+
+    id = SYM2ID(RARRAY_PTR(inf)[2]);
+    subst_inf->ivar[chr] = rb_intern(RSTRING_PTR(rb_str_cat2(rb_str_new2("@"), rb_id2name(id))));
+
+    rb_attr(self, id, 1, 0, Qtrue);
+  }
+
+
+  /*
+   * longkeys : array of [name, type, ivar]
+   *         name ==> longname key string
+   *         type ==> char code or string
+   *         ivar ==> symbol
+   */
+  len = RARRAY_LEN(longkey_inf);
+  for(idx = 0; idx < len; idx++) {
+    inf = RARRAY_PTR(longkey_inf)[idx];
+    if (TYPE(inf) != T_ARRAY) continue;
+
+    chr = (unsigned char)(0x80 + idx);
+    subst_inf->keylen[chr] = RSTRING_LEN(RARRAY_PTR(inf)[0]);
+#if HAVE_STRNDUP
+    subst_inf->key[chr] = strndup(RSTRING_PTR(RARRAY_PTR(inf)[0]), 
+				  RSTRING_LEN(RARRAY_PTR(inf)[0]));
+#else
+    subst_inf->key[chr] = malloc(RSTRING_LEN(RARRAY_PTR(inf)[0]) + 1);
+    if (subst_inf->key[chr]) {
+      strncpy(subst_inf->key[chr], RSTRING_PTR(RARRAY_PTR(inf)[0]),
+	      RSTRING_LEN(RARRAY_PTR(inf)[0]) + 1);
+      subst_inf->key[chr][RSTRING_LEN(RARRAY_PTR(inf)[0])] = '\0';
+    }
+#endif
+    if (TYPE(RARRAY_PTR(inf)[1]) == T_STRING) {
+      subst_inf->type[chr] = *(RSTRING_PTR(RARRAY_PTR(inf)[1]));
+    } else {
+      subst_inf->type[chr] = NUM2CHR(RARRAY_PTR(inf)[1]);
+    }
+
+    subst_inf->full_subst_length += (subst_inf->keylen[chr] + 2);
+
+    id = SYM2ID(RARRAY_PTR(inf)[2]);
+    subst_inf->ivar[chr] = rb_intern(RSTRING_PTR(rb_str_cat2(rb_str_new2("@"), rb_id2name(id))));
+
+    rb_attr(self, id, 1, 0, Qtrue);
+  }
+
+  /*
+   * procs : array of [type, proc]
+   *         type  ==> char code or string
+   *         proc  ==> proc/method/obj (must respond to 'call')
+   */
+  len = RARRAY_LEN(proc_inf);
+  for(idx = 0; idx < len; idx++) {
+    inf = RARRAY_PTR(proc_inf)[idx];
+    if (TYPE(inf) != T_ARRAY) continue;
+    rb_hash_aset(subst_inf->proc, 
+		 ((TYPE(RARRAY_PTR(inf)[0]) == T_STRING)? 
+		  INT2FIX(*(RSTRING_PTR(RARRAY_PTR(inf)[0]))) : 
+		  RARRAY_PTR(inf)[0]), 
+		 RARRAY_PTR(inf)[1]);
+  }
+
+  rb_const_set(self, ID_SUBST_INFO, 
+	       Data_Wrap_Struct(cSUBST_INFO, subst_mark, 
+				subst_free, subst_inf));
+
+  return self;
+}
+
+static VALUE
+cbsubst_get_extra_args_tbl(self)
+    VALUE self;
+{
+  return rb_ary_new();
+}
+
+static VALUE
+cbsubst_scan_args(self, arg_key, val_ary)
+    VALUE self;
+    VALUE arg_key;
+    VALUE val_ary;
+{
+    struct cbsubst_info *inf;
+    int idx;
+    unsigned char *keyptr = (unsigned char*)RSTRING_PTR(arg_key);
+    int keylen = RSTRING_LEN(arg_key);
+    int vallen = RARRAY_LEN(val_ary);
+    unsigned char type_chr;
+    volatile VALUE dst = rb_ary_new2(vallen);
+    volatile VALUE proc;
+    int thr_crit_bup;
+    VALUE old_gc;
+
+    thr_crit_bup = rb_thread_critical;
+    rb_thread_critical = Qtrue;
+
+    old_gc = rb_gc_disable();
+
+    Data_Get_Struct(rb_const_get(self, ID_SUBST_INFO), 
+                    struct cbsubst_info, inf);
+
+    for(idx = 0; idx < vallen; idx++) {
+      if (idx >= keylen) {
+	proc = Qnil;
+      } else if (*(keyptr + idx) == ' ') {
+	proc = Qnil;
+      } else {
+	if (type_chr = inf->type[*(keyptr + idx)]) {
+	  proc = rb_hash_aref(inf->proc, INT2FIX((int)type_chr));
+	} else {
+	  proc = Qnil;
+	}
+      }
+
+      if (NIL_P(proc)) {
+	rb_ary_push(dst, RARRAY_PTR(val_ary)[idx]);
+      } else {
+	rb_ary_push(dst, rb_funcall(proc, ID_call, 1, 
+				    RARRAY_PTR(val_ary)[idx]));
+      }
+    }
+
+    if (old_gc == Qfalse) rb_gc_enable();
+    rb_thread_critical = thr_crit_bup;
+
+    return dst;
+}
+
+static VALUE
+cbsubst_inspect(self)
+    VALUE self;
+{
+    return rb_str_new2("CallbackSubst");
+}
+
+static VALUE
+substinfo_inspect(self)
+    VALUE self;
+{
+    return rb_str_new2("SubstInfo");
+}
+
+/*************************************/
+
+static VALUE
+tk_cbe_inspect(self)
+    VALUE self;
+{
+    return rb_str_new2("TkCallbackEntry");
+}
+
+/*************************************/
+
+static VALUE
+tkobj_path(self)
+    VALUE self;
+{
+    return rb_ivar_get(self, ID_at_path);
+}
+
+
+/*************************************/
+/* release date */
+const char tkutil_release_date[] = TKUTIL_RELEASE_DATE;
+
+void
+Init_tkutil()
+{
+    VALUE cTK = rb_define_class("TkKernel", rb_cObject);
+    VALUE mTK = rb_define_module("TkUtil");
+
+    /* --------------------- */
+
+    rb_define_const(mTK, "RELEASE_DATE", 
+                    rb_obj_freeze(rb_str_new2(tkutil_release_date)));
+
+    /* --------------------- */
+    rb_global_variable(&cMethod);
+    cMethod = rb_const_get(rb_cObject, rb_intern("Method"));
+
+    ID_path = rb_intern("path");
+    ID_at_path = rb_intern("@path");
+    ID_at_enc = rb_intern("@encoding");
+    ID_to_eval = rb_intern("to_eval");
+    ID_to_s = rb_intern("to_s");
+    ID_source = rb_intern("source");
+    ID_downcase = rb_intern("downcase");
+    ID_install_cmd = rb_intern("install_cmd");
+    ID_merge_tklist = rb_intern("_merge_tklist");
+    ID_encoding = rb_intern("encoding");
+    ID_encoding_system = rb_intern("encoding_system");
+    ID_call = rb_intern("call");
+
+    /* --------------------- */
+    cCB_SUBST = rb_define_class_under(mTK, "CallbackSubst", rb_cObject);
+    rb_define_singleton_method(cCB_SUBST, "inspect", cbsubst_inspect, 0);
+
+    cSUBST_INFO = rb_define_class_under(cCB_SUBST, "Info", rb_cObject);
+    rb_define_singleton_method(cSUBST_INFO, "inspect", substinfo_inspect, 0);
+
+    ID_SUBST_INFO = rb_intern("SUBST_INFO");
+    rb_define_singleton_method(cCB_SUBST, "ret_val", cbsubst_ret_val, 1);
+    rb_define_singleton_method(cCB_SUBST, "scan_args", cbsubst_scan_args, 2);
+    rb_define_singleton_method(cCB_SUBST, "_sym2subst", 
+			       cbsubst_sym_to_subst, 1);
+    rb_define_singleton_method(cCB_SUBST, "subst_arg", 
+                               cbsubst_get_subst_arg, -1);
+    rb_define_singleton_method(cCB_SUBST, "_get_subst_key", 
+                               cbsubst_get_subst_key,  1);
+    rb_define_singleton_method(cCB_SUBST, "_get_all_subst_keys", 
+                               cbsubst_get_all_subst_keys,  0);
+    rb_define_singleton_method(cCB_SUBST, "_setup_subst_table", 
+                               cbsubst_table_setup, -1);
+    rb_define_singleton_method(cCB_SUBST, "_get_extra_args_tbl", 
+                               cbsubst_get_extra_args_tbl,  0);
+    rb_define_singleton_method(cCB_SUBST, "_define_attribute_aliases", 
+                               cbsubst_def_attr_aliases,  1);
+
+    rb_define_method(cCB_SUBST, "initialize", cbsubst_initialize, -1);
+
+    cbsubst_init();
+
+    /* --------------------- */
+    rb_global_variable(&cTkCallbackEntry);
+    cTkCallbackEntry = rb_define_class("TkCallbackEntry", cTK);
+    rb_define_singleton_method(cTkCallbackEntry, "inspect", tk_cbe_inspect, 0);
+
+    /* --------------------- */
+    rb_global_variable(&cTkObject);
+    cTkObject = rb_define_class("TkObject", cTK);
+    rb_define_method(cTkObject, "path", tkobj_path, 0);
+
+    /* --------------------- */
+    rb_require("tcltklib");
+    rb_global_variable(&cTclTkLib);
+    cTclTkLib = rb_const_get(rb_cObject, rb_intern("TclTkLib"));
+    ID_split_tklist = rb_intern("_split_tklist");
+    ID_toUTF8 = rb_intern("_toUTF8");
+    ID_fromUTF8 = rb_intern("_fromUTF8");
+
+    /* --------------------- */
+    rb_define_singleton_method(cTK, "new", tk_s_new, -1);
+
+    /* --------------------- */
+    rb_global_variable(&TK_None);
+    TK_None = rb_obj_alloc(rb_cObject);
+    rb_define_const(mTK, "None", TK_None);
+    rb_define_singleton_method(TK_None, "to_s", tkNone_to_s, 0);
+    rb_define_singleton_method(TK_None, "inspect", tkNone_to_s, 0);
+    OBJ_FREEZE(TK_None);
+
+    /* --------------------- */
+    rb_global_variable(&CALLBACK_TABLE);
+    CALLBACK_TABLE = rb_hash_new();
+
+    /* --------------------- */
+    rb_define_singleton_method(mTK, "eval_cmd", tk_eval_cmd, -1);
+    rb_define_singleton_method(mTK, "callback", tk_do_callback, -1);
+    rb_define_singleton_method(mTK, "install_cmd", tk_install_cmd, -1);
+    rb_define_singleton_method(mTK, "uninstall_cmd", tk_uninstall_cmd, 1);
+    rb_define_singleton_method(mTK, "_symbolkey2str", tk_symbolkey2str, 1);
+    rb_define_singleton_method(mTK, "hash_kv", tk_hash_kv, -1);
+    rb_define_singleton_method(mTK, "_get_eval_string", 
+                               tk_get_eval_string, -1);
+    rb_define_singleton_method(mTK, "_get_eval_enc_str", 
+                               tk_get_eval_enc_str, 1);
+    rb_define_singleton_method(mTK, "_conv_args", tk_conv_args, -1);
+
+    rb_define_singleton_method(mTK, "bool", tcl2rb_bool, 1);
+    rb_define_singleton_method(mTK, "number", tcl2rb_number, 1);
+    rb_define_singleton_method(mTK, "string", tcl2rb_string, 1);
+    rb_define_singleton_method(mTK, "num_or_str", tcl2rb_num_or_str, 1);
+
+    rb_define_method(mTK, "_toUTF8", tk_toUTF8, -1);
+    rb_define_method(mTK, "_fromUTF8", tk_fromUTF8, -1);
+    rb_define_method(mTK, "_symbolkey2str", tk_symbolkey2str, 1);
+    rb_define_method(mTK, "hash_kv", tk_hash_kv, -1);
+    rb_define_method(mTK, "_get_eval_string", tk_get_eval_string, -1);
+    rb_define_method(mTK, "_get_eval_enc_str", tk_get_eval_enc_str, 1);
+    rb_define_method(mTK, "_conv_args", tk_conv_args, -1);
+
+    rb_define_method(mTK, "bool", tcl2rb_bool, 1);
+    rb_define_method(mTK, "number", tcl2rb_number, 1);
+    rb_define_method(mTK, "string", tcl2rb_string, 1);
+    rb_define_method(mTK, "num_or_str", tcl2rb_num_or_str, 1);
+
+    /* --------------------- */
+    rb_global_variable(&ENCODING_NAME_UTF8);
+    ENCODING_NAME_UTF8 = rb_obj_freeze(rb_str_new2("utf-8"));
+
+    /* --------------------- */
+}