ruby--ruby/ext/digest/md5/md5init.c

/* $RoughId: md5init.c,v 1.2 2001/07/13 19:49:10 knu Exp $ */
/* $Id$ */

#include <ruby/ruby.h>
#include "../digest.h"
#if defined(MD5_USE_COMMONDIGEST)
#include "md5cc.h"
#else
#include "md5.h"
#endif

static const rb_digest_metadata_t md5 = {
    RUBY_DIGEST_API_VERSION,
    MD5_DIGEST_LENGTH,
    MD5_BLOCK_LENGTH,
    sizeof(MD5_CTX),
    (rb_digest_hash_init_func_t)MD5_Init,
    (rb_digest_hash_update_func_t)MD5_Update,
    (rb_digest_hash_finish_func_t)MD5_Finish,
};

/*
 * Document-class: Digest::MD5 < Digest::Base
 * A class for calculating message digests using the MD5
 * Message-Digest Algorithm by RSA Data Security, Inc., described in
 * RFC1321.
 *
 * MD5 calculates a digest of 128 bits (16 bytes).
 *
 * == Examples
 *  require 'digest'
 *
 *  # Compute a complete digest
 *  Digest::MD5.hexdigest 'abc'      #=> "90015098..."
 *
 *  # Compute digest by chunks
 *  md5 = Digest::MD5.new               # =>#<Digest::MD5>
 *  md5.update "ab"
 *  md5 << "c"                           # alias for #update
 *  md5.hexdigest                        # => "90015098..."
 *
 *  # Use the same object to compute another digest
 *  md5.reset
 *  md5 << "message"
 *  md5.hexdigest                        # => "78e73102..."
 */
void
Init_md5(void)
{
    VALUE mDigest, cDigest_Base, cDigest_MD5;

#if 0
    mDigest = rb_define_module("Digest"); /* let rdoc know */
#endif
    mDigest = rb_digest_namespace();
    cDigest_Base = rb_path2class("Digest::Base");

    cDigest_MD5 = rb_define_class_under(mDigest, "MD5", cDigest_Base);

    rb_iv_set(cDigest_MD5, "metadata", rb_digest_make_metadata(&md5));
}