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diff --git a/genqrcode/mqrspec.h b/genqrcode/mqrspec.h
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+/*
+ * qrencode - QR Code encoder
+ *
+ * Micro QR Code specification in convenient format.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef MQRSPEC_H
+#define MQRSPEC_H
+
+#include "qrencode.h"
+
+/******************************************************************************
+ * Version and capacity
+ *****************************************************************************/
+
+/**
+ * Maximum width of a symbol
+ */
+#define MQRSPEC_WIDTH_MAX 17
+
+/**
+ * Return maximum data code length (bits) for the version.
+ * @param version version of the symbol
+ * @param level error correction level
+ * @return maximum size (bits)
+ */
+extern int MQRspec_getDataLengthBit(int version, QRecLevel level);
+
+/**
+ * Return maximum data code length (bytes) for the version.
+ * @param version version of the symbol
+ * @param level error correction level
+ * @return maximum size (bytes)
+ */
+extern int MQRspec_getDataLength(int version, QRecLevel level);
+
+/**
+ * Return maximum error correction code length (bytes) for the version.
+ * @param version version of the symbol
+ * @param level error correction level
+ * @return ECC size (bytes)
+ */
+extern int MQRspec_getECCLength(int version, QRecLevel level);
+
+/**
+ * Return a version number that satisfies the input code length.
+ * @param size input code length (byte)
+ * @param level error correction level
+ * @return version number
+ */
+extern int MQRspec_getMinimumVersion(int size, QRecLevel level);
+
+/**
+ * Return the width of the symbol for the version.
+ * @param version version of the symbol
+ * @return width
+ */
+extern int MQRspec_getWidth(int version);
+
+/**
+ * Return the numer of remainder bits.
+ * @param version version of the symbol
+ * @return number of remainder bits
+ */
+extern int MQRspec_getRemainder(int version);
+
+/******************************************************************************
+ * Length indicator
+ *****************************************************************************/
+
+/**
+ * Return the size of length indicator for the mode and version.
+ * @param mode encode mode
+ * @param version vesion of the symbol
+ * @return the size of the appropriate length indicator (bits).
+ */
+extern int MQRspec_lengthIndicator(QRencodeMode mode, int version);
+
+/**
+ * Return the maximum length for the mode and version.
+ * @param mode encode mode
+ * @param version vesion of the symbol
+ * @return the maximum length (bytes)
+ */
+extern int MQRspec_maximumWords(QRencodeMode mode, int version);
+
+/******************************************************************************
+ * Version information pattern
+ *****************************************************************************/
+
+/**
+ * Return BCH encoded version information pattern that is used for the symbol
+ * of version 7 or greater. Use lower 18 bits.
+ * @param version vesion of the symbol
+ * @return BCH encoded version information pattern
+ */
+extern unsigned int MQRspec_getVersionPattern(int version);
+
+/******************************************************************************
+ * Format information
+ *****************************************************************************/
+
+/**
+ * Return BCH encoded format information pattern.
+ * @param mask mask number
+ * @param version version of the symbol
+ * @param level error correction level
+ * @return BCH encoded format information pattern
+ */
+extern unsigned int MQRspec_getFormatInfo(int mask, int version, QRecLevel level);
+
+/******************************************************************************
+ * Frame
+ *****************************************************************************/
+
+/**
+ * Return a copy of initialized frame.
+ * @param version version of the symbol
+ * @return Array of unsigned char. You can free it by free().
+ */
+extern unsigned char *MQRspec_newFrame(int version);
+
+/******************************************************************************
+ * Mode indicator
+ *****************************************************************************/
+
+/**
+ * Mode indicator. See Table 2 in Appendix 1 of JIS X0510:2004, p.107.
+ */
+#define MQRSPEC_MODEID_NUM       0
+#define MQRSPEC_MODEID_AN        1
+#define MQRSPEC_MODEID_8         2
+#define MQRSPEC_MODEID_KANJI     3
+
+#endif /* MQRSPEC_H */