Removed sdbm and it tests

1 files changed, 0 insertions, 1067 deletions

diff --git a/ext/sdbm/init.c b/ext/sdbm/init.c
deleted file mode 100644
index 42292b99cd..0000000000
--- a/ext/sdbm/init.c
+++ /dev/null
@@ -1,1067 +0,0 @@
-/************************************************
-
-  sdbminit.c -
-
-  $Author$
-  created at: Fri May  7 08:34:24 JST 1999
-
-  Copyright (C) 1995-2001 Yukihiro Matsumoto
-
-************************************************/
-
-#include "ruby.h"
-
-#include "sdbm.h"
-#include <fcntl.h>
-#include <errno.h>
-
-/*
- * Document-class: SDBM
- *
- * SDBM provides a simple file-based key-value store, which can only store
- * String keys and values.
- *
- * Note that Ruby comes with the source code for SDBM, while the DBM and GDBM
- * standard libraries rely on external libraries and headers.
- *
- * === Examples
- *
- * Insert values:
- *
- *   require 'sdbm'
- *
- *   SDBM.open 'my_database' do |db|
- *     db['apple'] = 'fruit'
- *     db['pear'] = 'fruit'
- *     db['carrot'] = 'vegetable'
- *     db['tomato'] = 'vegetable'
- *   end
- *
- * Bulk update:
- *
- *   require 'sdbm'
- *
- *   SDBM.open 'my_database' do |db|
- *     db.update('peach' => 'fruit', 'tomato' => 'fruit')
- *   end
- *
- * Retrieve values:
- *
- *   require 'sdbm'
- *
- *   SDBM.open 'my_database' do |db|
- *     db.each do |key, value|
- *       puts "Key: #{key}, Value: #{value}"
- *     end
- *   end
- *
- * Outputs:
- *
- *   Key: apple, Value: fruit
- *   Key: pear, Value: fruit
- *   Key: carrot, Value: vegetable
- *   Key: peach, Value: fruit
- *   Key: tomato, Value: fruit
- */
-
-static VALUE rb_cDBM, rb_eDBMError;
-
-struct dbmdata {
-    int  di_size;
-    DBM *di_dbm;
-};
-
-NORETURN(static void closed_sdbm(void));
-
-static void
-closed_sdbm(void)
-{
-    rb_raise(rb_eDBMError, "closed SDBM file");
-}
-
-#define GetDBM(obj, dbmp) do {\
-    TypedData_Get_Struct((obj), struct dbmdata, &sdbm_type, (dbmp));\
-    if ((dbmp)->di_dbm == 0) closed_sdbm();\
-} while (0)
-
-#define GetDBM2(obj, dbmp, dbm) do {\
-    GetDBM((obj), (dbmp));\
-    (dbm) = (dbmp)->di_dbm;\
-} while (0)
-
-static void
-free_sdbm(void *ptr)
-{
-    struct dbmdata *dbmp = ptr;
-
-    if (dbmp->di_dbm) sdbm_close(dbmp->di_dbm);
-    ruby_xfree(dbmp);
-}
-
-static size_t
-memsize_dbm(const void *ptr)
-{
-    const struct dbmdata *dbmp = ptr;
-    size_t size = sizeof(*dbmp);
-    if (dbmp->di_dbm)
-	size += sizeof(DBM);
-    return size;
-}
-
-static const rb_data_type_t sdbm_type = {
-    "sdbm",
-    {0, free_sdbm, memsize_dbm,},
-    0, 0,
-    RUBY_TYPED_FREE_IMMEDIATELY,
-};
-
-/*
- * call-seq:
- *   sdbm.close -> nil
- *
- * Closes the database file.
- *
- * Raises SDBMError if the database is already closed.
- */
-static VALUE
-fsdbm_close(VALUE obj)
-{
-    struct dbmdata *dbmp;
-
-    GetDBM(obj, dbmp);
-    sdbm_close(dbmp->di_dbm);
-    dbmp->di_dbm = 0;
-
-    return Qnil;
-}
-
-/*
- * call-seq:
- *   sdbm.closed? -> true or false
- *
- * Returns +true+ if the database is closed.
- */
-static VALUE
-fsdbm_closed(VALUE obj)
-{
-    struct dbmdata *dbmp;
-
-    TypedData_Get_Struct(obj, struct dbmdata, &sdbm_type, dbmp);
-    if (dbmp->di_dbm == 0)
-	return Qtrue;
-
-    return Qfalse;
-}
-
-static VALUE
-fsdbm_alloc(VALUE klass)
-{
-    struct dbmdata *dbmp;
-
-    return TypedData_Make_Struct(klass, struct dbmdata, &sdbm_type, dbmp);
-}
-/*
- * call-seq:
- *   SDBM.new(filename, mode = 0666)
- *
- * Creates a new database handle by opening the given +filename+. SDBM actually
- * uses two physical files, with extensions '.dir' and '.pag'. These extensions
- * will automatically be appended to the +filename+.
- *
- * If the file does not exist, a new file will be created using the given
- * +mode+, unless +mode+ is explicitly set to nil. In the latter case, no
- * database will be created.
- *
- * If the file exists, it will be opened in read/write mode. If this fails, it
- * will be opened in read-only mode.
- */
-static VALUE
-fsdbm_initialize(int argc, VALUE *argv, VALUE obj)
-{
-    VALUE file, vmode;
-    DBM *dbm;
-    struct dbmdata *dbmp;
-    int mode;
-
-    TypedData_Get_Struct(obj, struct dbmdata, &sdbm_type, dbmp);
-    if (rb_scan_args(argc, argv, "11", &file, &vmode) == 1) {
-	mode = 0666;		/* default value */
-    }
-    else if (NIL_P(vmode)) {
-	mode = -1;		/* return nil if DB not exist */
-    }
-    else {
-	mode = NUM2INT(vmode);
-    }
-    FilePathValue(file);
-
-    dbm = 0;
-    if (mode >= 0)
-	dbm = sdbm_open(RSTRING_PTR(file), O_RDWR|O_CREAT, mode);
-    if (!dbm)
-	dbm = sdbm_open(RSTRING_PTR(file), O_RDWR, 0);
-    if (!dbm)
-	dbm = sdbm_open(RSTRING_PTR(file), O_RDONLY, 0);
-
-    if (!dbm) {
-	if (mode == -1) return Qnil;
-	rb_sys_fail_str(file);
-    }
-
-    if (dbmp->di_dbm)
-	sdbm_close(dbmp->di_dbm);
-    dbmp->di_dbm = dbm;
-    dbmp->di_size = -1;
-
-    return obj;
-}
-
-/*
- * call-seq:
- *   SDBM.open(filename, mode = 0666)
- *   SDBM.open(filename, mode = 0666) { |sdbm| ... }
- *
- * If called without a block, this is the same as SDBM.new.
- *
- * If a block is given, the new database will be passed to the block and
- * will be safely closed after the block has executed.
- *
- * Example:
- *
- *     require 'sdbm'
- *
- *     SDBM.open('my_database') do |db|
- *       db['hello'] = 'world'
- *     end
- */
-static VALUE
-fsdbm_s_open(int argc, VALUE *argv, VALUE klass)
-{
-    VALUE obj = fsdbm_alloc(klass);
-
-    if (NIL_P(fsdbm_initialize(argc, argv, obj))) {
-	return Qnil;
-    }
-
-    if (rb_block_given_p()) {
-        return rb_ensure(rb_yield, obj, fsdbm_close, obj);
-    }
-
-    return obj;
-}
-
-static VALUE
-fsdbm_fetch(VALUE obj, VALUE keystr, VALUE ifnone)
-{
-    datum key, value;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    ExportStringValue(keystr);
-    key.dptr = RSTRING_PTR(keystr);
-    key.dsize = RSTRING_LENINT(keystr);
-
-    GetDBM2(obj, dbmp, dbm);
-    value = sdbm_fetch(dbm, key);
-    if (value.dptr == 0) {
-	if (ifnone == Qnil && rb_block_given_p())
-	    return rb_yield(rb_external_str_new(key.dptr, key.dsize));
-	return ifnone;
-    }
-    return rb_external_str_new(value.dptr, value.dsize);
-}
-
-/*
- * call-seq:
- *   sdbm[key] -> value or nil
- *
- * Returns the +value+ in the database associated with the given +key+ string.
- *
- * If no value is found, returns +nil+.
- */
-static VALUE
-fsdbm_aref(VALUE obj, VALUE keystr)
-{
-    return fsdbm_fetch(obj, keystr, Qnil);
-}
-
-/*
- * call-seq:
- *   sdbm.fetch(key) -> value or nil
- *   sdbm.fetch(key) { |key| ... }
- *
- * Returns the +value+ in the database associated with the given +key+ string.
- *
- * If a block is provided, the block will be called when there is no
- * +value+ associated with the given +key+. The +key+ will be passed in as an
- * argument to the block.
- *
- * If no block is provided and no value is associated with the given +key+,
- * then an IndexError will be raised.
- */
-static VALUE
-fsdbm_fetch_m(int argc, VALUE *argv, VALUE obj)
-{
-    VALUE keystr, valstr, ifnone;
-
-    rb_scan_args(argc, argv, "11", &keystr, &ifnone);
-    valstr = fsdbm_fetch(obj, keystr, ifnone);
-    if (argc == 1 && !rb_block_given_p() && NIL_P(valstr))
-	rb_raise(rb_eIndexError, "key not found");
-
-    return valstr;
-}
-
-/*
- * call-seq:
- *   sdbm.key(value) -> key
- *
- * Returns the +key+ associated with the given +value+. If more than one
- * +key+ corresponds to the given +value+, then the first key to be found
- * will be returned. If no keys are found, +nil+ will be returned.
- */
-static VALUE
-fsdbm_key(VALUE obj, VALUE valstr)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    ExportStringValue(valstr);
-    val.dptr = RSTRING_PTR(valstr);
-    val.dsize = RSTRING_LENINT(valstr);
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	val = sdbm_fetch(dbm, key);
-	if (val.dsize == RSTRING_LEN(valstr) &&
-	    memcmp(val.dptr, RSTRING_PTR(valstr), val.dsize) == 0)
-	    return rb_external_str_new(key.dptr, key.dsize);
-    }
-    return Qnil;
-}
-
-/*
- * :nodoc:
- */
-static VALUE
-fsdbm_index(VALUE hash, VALUE value)
-{
-    rb_warn("SDBM#index is deprecated; use SDBM#key");
-    return fsdbm_key(hash, value);
-}
-
-/* call-seq:
- *   sdbm.select { |key, value| ... } -> Array
- *
- * Returns a new Array of key-value pairs for which the block returns +true+.
- *
- * Example:
- *
- *    require 'sdbm'
- *
- *    SDBM.open 'my_database' do |db|
- *      db['apple'] = 'fruit'
- *      db['pear'] = 'fruit'
- *      db['spinach'] = 'vegetable'
- *
- *      veggies = db.select do |key, value|
- *        value == 'vegetable'
- *      end #=> [["apple", "fruit"], ["pear", "fruit"]]
- *    end
- */
-static VALUE
-fsdbm_select(VALUE obj)
-{
-    VALUE new = rb_ary_new();
-    datum key, val;
-    DBM *dbm;
-    struct dbmdata *dbmp;
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	VALUE assoc, v;
-	val = sdbm_fetch(dbm, key);
-	assoc = rb_assoc_new(rb_external_str_new(key.dptr, key.dsize),
-			     rb_external_str_new(val.dptr, val.dsize));
-	v = rb_yield(assoc);
-	if (RTEST(v)) {
-	    rb_ary_push(new, assoc);
-	}
-	GetDBM2(obj, dbmp, dbm);
-    }
-
-    return new;
-}
-
-/* call-seq:
- *   sdbm.values_at(key, ...) -> Array
- *
- * Returns an Array of values corresponding to the given keys.
- */
-static VALUE
-fsdbm_values_at(int argc, VALUE *argv, VALUE obj)
-{
-    VALUE new = rb_ary_new2(argc);
-    int i;
-
-    for (i=0; i<argc; i++) {
-        rb_ary_push(new, fsdbm_fetch(obj, argv[i], Qnil));
-    }
-
-    return new;
-}
-
-static void
-fdbm_modify(VALUE obj)
-{
-    if (OBJ_FROZEN(obj)) rb_error_frozen("SDBM");
-}
-
-/*
- * call-seq:
- *   sdbm.delete(key) -> value or nil
- *   sdbm.delete(key) { |key, value| ... }
- *
- * Deletes the key-value pair corresponding to the given +key+. If the
- * +key+ exists, the deleted value will be returned, otherwise +nil+.
- *
- * If a block is provided, the deleted +key+ and +value+ will be passed to
- * the block as arguments. If the +key+ does not exist in the database, the
- * value will be +nil+.
- */
-static VALUE
-fsdbm_delete(VALUE obj, VALUE keystr)
-{
-    datum key, value;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE valstr;
-
-    fdbm_modify(obj);
-    ExportStringValue(keystr);
-    key.dptr = RSTRING_PTR(keystr);
-    key.dsize = RSTRING_LENINT(keystr);
-
-    GetDBM2(obj, dbmp, dbm);
-    dbmp->di_size = -1;
-
-    value = sdbm_fetch(dbm, key);
-    if (value.dptr == 0) {
-	if (rb_block_given_p()) return rb_yield(keystr);
-	return Qnil;
-    }
-
-    /* need to save value before sdbm_delete() */
-    valstr = rb_external_str_new(value.dptr, value.dsize);
-
-    if (sdbm_delete(dbm, key)) {
-	dbmp->di_size = -1;
-	rb_raise(rb_eDBMError, "dbm_delete failed");
-    }
-    else if (dbmp->di_size >= 0) {
-	dbmp->di_size--;
-    }
-    return valstr;
-}
-
-/*
- * call-seq:
- *   sdbm.shift -> Array or nil
- *
- * Removes a key-value pair from the database and returns them as an
- * Array. If the database is empty, returns +nil+.
- */
-static VALUE
-fsdbm_shift(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE keystr, valstr;
-
-    fdbm_modify(obj);
-    GetDBM2(obj, dbmp, dbm);
-    key = sdbm_firstkey(dbm);
-    if (!key.dptr) return Qnil;
-    val = sdbm_fetch(dbm, key);
-    keystr = rb_external_str_new(key.dptr, key.dsize);
-    valstr = rb_external_str_new(val.dptr, val.dsize);
-    sdbm_delete(dbm, key);
-    if (dbmp->di_size >= 0) {
-	dbmp->di_size--;
-    }
-
-    return rb_assoc_new(keystr, valstr);
-}
-
-/*
- * call-seq:
- *   sdbm.delete_if { |key, value| ... } -> self
- *   sdbm.reject!   { |key, value| ... } -> self
- *
- * Iterates over the key-value pairs in the database, deleting those for
- * which the block returns +true+.
- */
-static VALUE
-fsdbm_delete_if(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE keystr, valstr;
-    VALUE ret, ary = rb_ary_new();
-    long i;
-    int status = 0, n;
-
-    fdbm_modify(obj);
-    GetDBM2(obj, dbmp, dbm);
-    n = dbmp->di_size;
-    dbmp->di_size = -1;
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	val = sdbm_fetch(dbm, key);
-	keystr = rb_external_str_new(key.dptr, key.dsize);
-	valstr = rb_external_str_new(val.dptr, val.dsize);
-        ret = rb_protect(rb_yield, rb_assoc_new(rb_str_dup(keystr), valstr), &status);
-        if (status != 0) break;
-	if (RTEST(ret)) rb_ary_push(ary, keystr);
-	GetDBM2(obj, dbmp, dbm);
-    }
-
-    for (i = 0; i < RARRAY_LEN(ary); i++) {
-	keystr = RARRAY_AREF(ary, i);
-	ExportStringValue(keystr);
-	key.dptr = RSTRING_PTR(keystr);
-	key.dsize = RSTRING_LENINT(keystr);
-	if (sdbm_delete(dbm, key)) {
-	    rb_raise(rb_eDBMError, "sdbm_delete failed");
-	}
-    }
-    if (status) rb_jump_tag(status);
-    if (n > 0) dbmp->di_size = n - RARRAY_LENINT(ary);
-
-    return obj;
-}
-
-/*
- * call-seq:
- *   sdbm.clear -> self
- *
- * Deletes all data from the database.
- */
-static VALUE
-fsdbm_clear(VALUE obj)
-{
-    datum key;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    fdbm_modify(obj);
-    GetDBM2(obj, dbmp, dbm);
-    dbmp->di_size = -1;
-    while (key = sdbm_firstkey(dbm), key.dptr) {
-	if (sdbm_delete(dbm, key)) {
-	    rb_raise(rb_eDBMError, "sdbm_delete failed");
-	}
-    }
-    dbmp->di_size = 0;
-
-    return obj;
-}
-
-/*
- * call-seq:
- *   sdbm.invert -> Hash
- *
- * Returns a Hash in which the key-value pairs have been inverted.
- *
- * Example:
- *
- *   require 'sdbm'
- *
- *   SDBM.open 'my_database' do |db|
- *     db.update('apple' => 'fruit', 'spinach' => 'vegetable')
- *
- *     db.invert  #=> {"fruit" => "apple", "vegetable" => "spinach"}
- *   end
- */
-static VALUE
-fsdbm_invert(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE keystr, valstr;
-    VALUE hash = rb_hash_new();
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	val = sdbm_fetch(dbm, key);
-	keystr = rb_external_str_new(key.dptr, key.dsize);
-	valstr = rb_external_str_new(val.dptr, val.dsize);
-	rb_hash_aset(hash, valstr, keystr);
-    }
-    return hash;
-}
-
-/*
- * call-seq:
- *   sdbm[key] = value      -> value
- *   sdbm.store(key, value) -> value
- *
- * Stores a new +value+ in the database with the given +key+ as an index.
- *
- * If the +key+ already exists, this will update the +value+ associated with
- * the +key+.
- *
- * Returns the given +value+.
- */
-static VALUE
-fsdbm_store(VALUE obj, VALUE keystr, VALUE valstr)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    if (valstr == Qnil) {
-	fsdbm_delete(obj, keystr);
-	return Qnil;
-    }
-
-    fdbm_modify(obj);
-    ExportStringValue(keystr);
-    ExportStringValue(valstr);
-
-    key.dptr = RSTRING_PTR(keystr);
-    key.dsize = RSTRING_LENINT(keystr);
-
-    val.dptr = RSTRING_PTR(valstr);
-    val.dsize = RSTRING_LENINT(valstr);
-
-    GetDBM2(obj, dbmp, dbm);
-    dbmp->di_size = -1;
-    if (sdbm_store(dbm, key, val, DBM_REPLACE)) {
-#ifdef HAVE_DBM_CLAERERR
-	sdbm_clearerr(dbm);
-#endif
-	if (errno == EPERM) rb_sys_fail(0);
-	rb_raise(rb_eDBMError, "sdbm_store failed");
-    }
-
-    return valstr;
-}
-
-static VALUE
-update_i(RB_BLOCK_CALL_FUNC_ARGLIST(pair, dbm))
-{
-    const VALUE *ptr;
-    Check_Type(pair, T_ARRAY);
-    if (RARRAY_LEN(pair) < 2) {
-	rb_raise(rb_eArgError, "pair must be [key, value]");
-    }
-    ptr = RARRAY_CONST_PTR(pair);
-    fsdbm_store(dbm, ptr[0], ptr[1]);
-    return Qnil;
-}
-
-/*
- * call-seq:
- *   sdbm.update(pairs) -> self
- *
- * Insert or update key-value pairs.
- *
- * This method will work with any object which implements an each_pair
- * method, such as a Hash.
- */
-static VALUE
-fsdbm_update(VALUE obj, VALUE other)
-{
-    rb_block_call(other, rb_intern("each_pair"), 0, 0, update_i, obj);
-    return obj;
-}
-
-/*
- * call-seq:
- *   sdbm.replace(pairs) -> self
- *
- * Empties the database, then inserts the given key-value pairs.
- *
- * This method will work with any object which implements an each_pair
- * method, such as a Hash.
- */
-static VALUE
-fsdbm_replace(VALUE obj, VALUE other)
-{
-    fsdbm_clear(obj);
-    rb_block_call(other, rb_intern("each_pair"), 0, 0, update_i, obj);
-    return obj;
-}
-
-/*
- * call-seq:
- *   sdbm.length -> integer
- *   sdbm.size -> integer
- *
- * Returns the number of keys in the database.
- */
-static VALUE
-fsdbm_length(VALUE obj)
-{
-    datum key;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    int i = 0;
-
-    GetDBM2(obj, dbmp, dbm);
-    if (dbmp->di_size > 0) return INT2FIX(dbmp->di_size);
-
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	i++;
-    }
-    dbmp->di_size = i;
-
-    return INT2FIX(i);
-}
-
-/*
- * call-seq:
- *   sdbm.empty? -> true or false
- *
- * Returns +true+ if the database is empty.
- */
-static VALUE
-fsdbm_empty_p(VALUE obj)
-{
-    datum key;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    GetDBM(obj, dbmp);
-    if (dbmp->di_size < 0) {
-	dbm = dbmp->di_dbm;
-
-	for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	    return Qfalse;
-	}
-    }
-    else {
-	if (dbmp->di_size)
-	    return Qfalse;
-    }
-    return Qtrue;
-}
-
-/*
- * call-seq:
- *   sdbm.each_value
- *   sdbm.each_value { |value| ... }
- *
- * Iterates over each +value+ in the database.
- *
- * If no block is given, returns an Enumerator.
- */
-static VALUE
-fsdbm_each_value(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    RETURN_ENUMERATOR(obj, 0, 0);
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	val = sdbm_fetch(dbm, key);
-	rb_yield(rb_external_str_new(val.dptr, val.dsize));
-	GetDBM2(obj, dbmp, dbm);
-    }
-    return obj;
-}
-
-/*
- * call-seq:
- *   sdbm.each_key
- *   sdbm.each_key { |key| ... }
- *
- * Iterates over each +key+ in the database.
- *
- * If no block is given, returns an Enumerator.
- */
-static VALUE
-fsdbm_each_key(VALUE obj)
-{
-    datum key;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    RETURN_ENUMERATOR(obj, 0, 0);
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	rb_yield(rb_external_str_new(key.dptr, key.dsize));
-	GetDBM2(obj, dbmp, dbm);
-    }
-    return obj;
-}
-
-/*
- * call-seq:
- *   sdbm.each
- *   sdbm.each { |key, value| ... }
- *   sdbm.each_pair
- *   sdbm.each_pair { |key, value| ... }
- *
- * Iterates over each key-value pair in the database.
- *
- * If no block is given, returns an Enumerator.
- */
-static VALUE
-fsdbm_each_pair(VALUE obj)
-{
-    datum key, val;
-    DBM *dbm;
-    struct dbmdata *dbmp;
-    VALUE keystr, valstr;
-
-    RETURN_ENUMERATOR(obj, 0, 0);
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	val = sdbm_fetch(dbm, key);
-	keystr = rb_external_str_new(key.dptr, key.dsize);
-	valstr = rb_external_str_new(val.dptr, val.dsize);
-	rb_yield(rb_assoc_new(keystr, valstr));
-	GetDBM2(obj, dbmp, dbm);
-    }
-
-    return obj;
-}
-
-/*
- * call-seq:
- *   sdbm.keys -> Array
- *
- * Returns a new Array containing the keys in the database.
- */
-static VALUE
-fsdbm_keys(VALUE obj)
-{
-    datum key;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE ary;
-
-    GetDBM2(obj, dbmp, dbm);
-    ary = rb_ary_new();
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	rb_ary_push(ary, rb_external_str_new(key.dptr, key.dsize));
-    }
-
-    return ary;
-}
-
-/*
- * call-seq:
- *   sdbm.values -> Array
- *
- * Returns a new Array containing the values in the database.
- */
-static VALUE
-fsdbm_values(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE ary;
-
-    GetDBM2(obj, dbmp, dbm);
-    ary = rb_ary_new();
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	val = sdbm_fetch(dbm, key);
-	rb_ary_push(ary, rb_external_str_new(val.dptr, val.dsize));
-    }
-
-    return ary;
-}
-
-/*
- * call-seq:
- *   sdbm.include?(key) -> true or false
- *   sdbm.key?(key) -> true or false
- *   sdbm.member?(key) -> true or false
- *   sdbm.has_key?(key) -> true or false
- *
- * Returns +true+ if the database contains the given +key+.
- */
-static VALUE
-fsdbm_has_key(VALUE obj, VALUE keystr)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    ExportStringValue(keystr);
-    key.dptr = RSTRING_PTR(keystr);
-    key.dsize = RSTRING_LENINT(keystr);
-
-    GetDBM2(obj, dbmp, dbm);
-    val = sdbm_fetch(dbm, key);
-    if (val.dptr) return Qtrue;
-    return Qfalse;
-}
-
-/*
- * call-seq:
- *   sdbm.value?(key) -> true or false
- *   sdbm.has_value?(key) -> true or false
- *
- * Returns +true+ if the database contains the given +value+.
- */
-static VALUE
-fsdbm_has_value(VALUE obj, VALUE valstr)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    ExportStringValue(valstr);
-    val.dptr = RSTRING_PTR(valstr);
-    val.dsize = RSTRING_LENINT(valstr);
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	val = sdbm_fetch(dbm, key);
-	if (val.dsize == RSTRING_LENINT(valstr) &&
-	    memcmp(val.dptr, RSTRING_PTR(valstr), val.dsize) == 0)
-	    return Qtrue;
-    }
-    return Qfalse;
-}
-
-/*
- * call-seq:
- *   sdbm.to_a -> Array
- *
- * Returns a new Array containing each key-value pair in the database.
- *
- * Example:
- *
- *   require 'sdbm'
- *
- *   SDBM.open 'my_database' do |db|
- *     db.update('apple' => 'fruit', 'spinach' => 'vegetable')
- *
- *     db.to_a  #=> [["apple", "fruit"], ["spinach", "vegetable"]]
- *   end
- */
-static VALUE
-fsdbm_to_a(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE ary;
-
-    GetDBM2(obj, dbmp, dbm);
-    ary = rb_ary_new();
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	val = sdbm_fetch(dbm, key);
-	rb_ary_push(ary, rb_assoc_new(rb_external_str_new(key.dptr, key.dsize),
-				      rb_external_str_new(val.dptr, val.dsize)));
-    }
-
-    return ary;
-}
-
-/*
- * call-seq:
- *   sdbm.to_hash -> Hash
- *
- * Returns a new Hash containing each key-value pair in the database.
- */
-static VALUE
-fsdbm_to_hash(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE hash;
-
-    GetDBM2(obj, dbmp, dbm);
-    hash = rb_hash_new();
-    for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
-	val = sdbm_fetch(dbm, key);
-	rb_hash_aset(hash, rb_external_str_new(key.dptr, key.dsize),
-		           rb_external_str_new(val.dptr, val.dsize));
-    }
-
-    return hash;
-}
-
-/*
- * call-seq:
- *   sdbm.reject { |key, value| ... } -> Hash
- *
- * Creates a new Hash using the key-value pairs from the database, then
- * calls Hash#reject with the given block, which returns a Hash with
- * only the key-value pairs for which the block returns +false+.
- */
-static VALUE
-fsdbm_reject(VALUE obj)
-{
-    return rb_hash_delete_if(fsdbm_to_hash(obj));
-}
-
-void
-Init_sdbm(void)
-{
-    rb_cDBM = rb_define_class("SDBM", rb_cObject);
-    rb_eDBMError = rb_define_class("SDBMError", rb_eStandardError);
-    /* Document-class: SDBMError
-     * Exception class used to return errors from the sdbm library.
-     */
-    rb_include_module(rb_cDBM, rb_mEnumerable);
-
-    rb_define_alloc_func(rb_cDBM, fsdbm_alloc);
-    rb_define_singleton_method(rb_cDBM, "open", fsdbm_s_open, -1);
-
-    rb_define_method(rb_cDBM, "initialize", fsdbm_initialize, -1);
-    rb_define_method(rb_cDBM, "close", fsdbm_close, 0);
-    rb_define_method(rb_cDBM, "closed?", fsdbm_closed, 0);
-    rb_define_method(rb_cDBM, "[]", fsdbm_aref, 1);
-    rb_define_method(rb_cDBM, "fetch", fsdbm_fetch_m, -1);
-    rb_define_method(rb_cDBM, "[]=", fsdbm_store, 2);
-    rb_define_method(rb_cDBM, "store", fsdbm_store, 2);
-    rb_define_method(rb_cDBM, "index",  fsdbm_index, 1);
-    rb_define_method(rb_cDBM, "key",  fsdbm_key, 1);
-    rb_define_method(rb_cDBM, "select",  fsdbm_select, 0);
-    rb_define_method(rb_cDBM, "values_at",  fsdbm_values_at, -1);
-    rb_define_method(rb_cDBM, "length", fsdbm_length, 0);
-    rb_define_method(rb_cDBM, "size", fsdbm_length, 0);
-    rb_define_method(rb_cDBM, "empty?", fsdbm_empty_p, 0);
-    rb_define_method(rb_cDBM, "each", fsdbm_each_pair, 0);
-    rb_define_method(rb_cDBM, "each_value", fsdbm_each_value, 0);
-    rb_define_method(rb_cDBM, "each_key", fsdbm_each_key, 0);
-    rb_define_method(rb_cDBM, "each_pair", fsdbm_each_pair, 0);
-    rb_define_method(rb_cDBM, "keys", fsdbm_keys, 0);
-    rb_define_method(rb_cDBM, "values", fsdbm_values, 0);
-    rb_define_method(rb_cDBM, "shift", fsdbm_shift, 0);
-    rb_define_method(rb_cDBM, "delete", fsdbm_delete, 1);
-    rb_define_method(rb_cDBM, "delete_if", fsdbm_delete_if, 0);
-    rb_define_method(rb_cDBM, "reject!", fsdbm_delete_if, 0);
-    rb_define_method(rb_cDBM, "reject", fsdbm_reject, 0);
-    rb_define_method(rb_cDBM, "clear", fsdbm_clear, 0);
-    rb_define_method(rb_cDBM,"invert", fsdbm_invert, 0);
-    rb_define_method(rb_cDBM,"update", fsdbm_update, 1);
-    rb_define_method(rb_cDBM,"replace", fsdbm_replace, 1);
-
-    rb_define_method(rb_cDBM, "has_key?", fsdbm_has_key, 1);
-    rb_define_method(rb_cDBM, "include?", fsdbm_has_key, 1);
-    rb_define_method(rb_cDBM, "key?", fsdbm_has_key, 1);
-    rb_define_method(rb_cDBM, "member?", fsdbm_has_key, 1);
-    rb_define_method(rb_cDBM, "has_value?", fsdbm_has_value, 1);
-    rb_define_method(rb_cDBM, "value?", fsdbm_has_value, 1);
-
-    rb_define_method(rb_cDBM, "to_a", fsdbm_to_a, 0);
-    rb_define_method(rb_cDBM, "to_hash", fsdbm_to_hash, 0);
-}