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+/*
+ bit_ops.h
+ Functions for dealing with conversion of data between types
+
+ Copyright (c) 2006 Michael "Chishm" Chisholm
+
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+ 3. The name of the author may not be used to endorse or promote products derived
+ from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
+ LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ 2006-07-11 - Chishm
+ * Original release
+*/
+
+#ifndef _BIT_OPS_H
+#define _BIT_OPS_H
+
+/*-----------------------------------------------------------------
+Functions to deal with little endian values stored in u8 arrays
+-----------------------------------------------------------------*/
+static inline u16 u8array_to_u16 (const u8* item, int offset) {
+ return ( item[offset] | (item[offset + 1] << 8));
+}
+
+static inline u32 u8array_to_u32 (const u8* item, int offset) {
+ return ( item[offset] | (item[offset + 1] << 8) | (item[offset + 2] << 16) | (item[offset + 3] << 24));
+}
+
+static inline void u16_to_u8array (u8* item, int offset, u16 value) {
+ item[offset] = (u8)value;
+ item[offset + 1] = (u8)(value >> 8);
+}
+
+static inline void u32_to_u8array (u8* item, int offset, u32 value) {
+ item[offset] = (u8)value;
+ item[offset + 1] = (u8)(value >> 8);
+ item[offset + 2] = (u8)(value >> 16);
+ item[offset + 3] = (u8)(value >> 24);
+}
+
+#endif // _BIT_OPS_H