--- /dev/null
+/* <endian_types.h>
+ *
+ * Quick hack to handle endianness and word length issues.
+ * Defines _le, _be, and _ne variants to standard ISO types
+ * like int32_t, that are stored in little-endian, big-endian,
+ * and native-endian byteorder in memory, respectively.
+ * Caveat: int32_le_t and friends cannot be used in vararg
+ * functions like printf() without an explicit cast.
+ *
+ * Copyright (c) 2003-2005 Daniel Kobras <kobras@debian.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef _ENDIAN_TYPES_H
+#define _ENDIAN_TYPES_H
+
+/* Needed for BYTE_ORDER and BIG/LITTLE_ENDIAN macros. */
+#ifndef _BSD_SOURCE
+# define _BSD_SOURCE
+# include <endian.h>
+# undef _BSD_SOURCE
+#else
+# include <endian.h>
+#endif
+
+#include <sys/types.h>
+#include <byteswap.h>
+
+static inline int8_t bswap(const int8_t& x)
+{
+ return x;
+}
+
+static inline u_int8_t bswap(const u_int8_t& x)
+{
+ return x;
+}
+
+static inline int16_t bswap(const int16_t& x)
+{
+ return bswap_16(x);
+}
+
+static inline u_int16_t bswap(const u_int16_t& x)
+{
+ return bswap_16(x);
+}
+
+static inline int32_t bswap(const int32_t& x)
+{
+ return bswap_32(x);
+}
+
+static inline u_int32_t bswap(const u_int32_t& x)
+{
+ return bswap_32(x);
+}
+
+static inline int64_t bswap(const int64_t& x)
+{
+ return bswap_64(x);
+}
+
+static inline u_int64_t bswap(const u_int64_t& x)
+{
+ return bswap_64(x);
+}
+
+#define le_to_cpu cpu_to_le
+#define be_to_cpu cpu_to_be
+
+template <class T> static inline T cpu_to_le(const T& x)
+{
+#if BYTE_ORDER == LITTLE_ENDIAN
+ return x;
+#else
+ return bswap(x);
+#endif
+}
+
+template <class T> static inline T cpu_to_be(const T& x)
+{
+#if BYTE_ORDER == LITTLE_ENDIAN
+ return bswap(x);
+#else
+ return x;
+#endif
+}
+
+template <class T> class le_t {
+ T m;
+ T read() const {
+ return le_to_cpu(m);
+ };
+ void write(const T& n) {
+ m = cpu_to_le(n);
+ };
+public:
+ le_t(void) {
+ m = 0;
+ };
+ le_t(const T& o) {
+ write(o);
+ };
+ operator T() const {
+ return read();
+ };
+ le_t<T> operator++() {
+ write(read() + 1);
+ return *this;
+ };
+ le_t<T> operator++(int) {
+ write(read() + 1);
+ return *this;
+ };
+ le_t<T> operator--() {
+ write(read() - 1);
+ return *this;
+ };
+ le_t<T> operator--(int) {
+ write(read() - 1);
+ return *this;
+ };
+ le_t<T>& operator+=(const T& t) {
+ write(read() + t);
+ return *this;
+ };
+ le_t<T>& operator-=(const T& t) {
+ write(read() - t);
+ return *this;
+ };
+ le_t<T>& operator&=(const le_t<T>& t) {
+ m &= t.m;
+ return *this;
+ };
+ le_t<T>& operator|=(const le_t<T>& t) {
+ m |= t.m;
+ return *this;
+ };
+} __attribute__((packed));
+
+/* Just copy-and-pasted from le_t. Too lazy to do it right. */
+
+template <class T> class be_t {
+ T m;
+ T read() const {
+ return be_to_cpu(m);
+ };
+ void write(const T& n) {
+ m = cpu_to_be(n);
+ };
+public:
+ be_t(void) {
+ m = 0;
+ };
+ be_t(const T& o) {
+ write(o);
+ };
+ operator T() const {
+ return read();
+ };
+ be_t<T> operator++() {
+ write(read() + 1);
+ return *this;
+ };
+ be_t<T> operator++(int) {
+ write(read() + 1);
+ return *this;
+ };
+ be_t<T> operator--() {
+ write(read() - 1);
+ return *this;
+ };
+ be_t<T> operator--(int) {
+ write(read() - 1);
+ return *this;
+ };
+ be_t<T>& operator+=(const T& t) {
+ write(read() + t);
+ return *this;
+ };
+ be_t<T>& operator-=(const T& t) {
+ write(read() - t);
+ return *this;
+ };
+ be_t<T>& operator&=(const be_t<T>& t) {
+ m &= t.m;
+ return *this;
+ };
+ be_t<T>& operator|=(const be_t<T>& t) {
+ m |= t.m;
+ return *this;
+ };
+} __attribute__((packed));
+
+/* Define types of native endianness similar to the little and big endian
+ * versions below. Not really necessary but useful occasionally to emphasize
+ * endianness of data.
+ */
+
+typedef int8_t int8_ne_t;
+typedef int16_t int16_ne_t;
+typedef int32_t int32_ne_t;
+typedef int64_t int64_ne_t;
+typedef u_int8_t u_int8_ne_t;
+typedef u_int16_t u_int16_ne_t;
+typedef u_int32_t u_int32_ne_t;
+typedef u_int64_t u_int64_ne_t;
+
+
+/* The classes work on their native endianness as well, but obviously
+ * introduce some overhead. Use the faster typedefs to native types
+ * therefore, unless you're debugging.
+ */
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+typedef int8_ne_t int8_le_t;
+typedef int16_ne_t int16_le_t;
+typedef int32_ne_t int32_le_t;
+typedef int64_ne_t int64_le_t;
+typedef u_int8_ne_t u_int8_le_t;
+typedef u_int16_ne_t u_int16_le_t;
+typedef u_int32_ne_t u_int32_le_t;
+typedef u_int64_ne_t u_int64_le_t;
+typedef int8_t int8_be_t;
+typedef be_t<int16_t> int16_be_t;
+typedef be_t<int32_t> int32_be_t;
+typedef be_t<int64_t> int64_be_t;
+typedef u_int8_t u_int8_be_t;
+typedef be_t<u_int16_t> u_int16_be_t;
+typedef be_t<u_int32_t> u_int32_be_t;
+typedef be_t<u_int64_t> u_int64_be_t;
+#else
+typedef int8_ne_t int8_be_t;
+typedef int16_ne_t int16_be_t;
+typedef int32_ne_t int32_be_t;
+typedef int64_ne_t int64_be_t;
+typedef u_int8_ne_t u_int8_be_t;
+typedef u_int16_ne_t u_int16_be_t;
+typedef u_int32_ne_t u_int32_be_t;
+typedef u_int64_ne_t u_int64_be_t;
+typedef int8_t int8_le_t;
+typedef le_t<int16_t> int16_le_t;
+typedef le_t<int32_t> int32_le_t;
+typedef le_t<int64_t> int64_le_t;
+typedef u_int8_t u_int8_le_t;
+typedef le_t<u_int16_t> u_int16_le_t;
+typedef le_t<u_int32_t> u_int32_le_t;
+typedef le_t<u_int64_t> u_int64_le_t;
+#endif
+
+#endif
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