-/*!
+/**
* \file
* <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction. Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License. This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
* Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
- * This file is part of DevLib - See README.devlib for information.
+ *
* -->
*
* \brief Common and handy function macros
/*#*
*#* $Log$
+ *#* Revision 1.11 2007/02/06 15:22:12 asterix
+ *#* Add ROTL and ROTR macros for bit rotating.
+ *#*
+ *#* Revision 1.10 2006/09/13 18:31:37 bernie
+ *#* BV8(), BV16(), BV32(): New macros for CPUs with small word size; SWAP_T(): New macro to support old compilers.
+ *#*
+ *#* Revision 1.9 2006/07/19 12:56:25 bernie
+ *#* Convert to new Doxygen style.
+ *#*
+ *#* Revision 1.8 2006/03/13 02:06:55 bernie
+ *#* ROUND_UP2: Rename from ROUND2.
+ *#*
*#* Revision 1.7 2006/02/20 14:34:58 bernie
*#* Use portable type checking.
*#*
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
#endif /* !(COMPILER_STATEMENT_EXPRESSIONS && COMPILER_TYPEOF) */
-/*! Bound \a x between \a min and \a max. */
+/** Bound \a x between \a min and \a max. */
#define MINMAX(min,x,max) (MIN(MAX(min, x), max))
#ifdef __cplusplus
/* Use standard implementation from <algorithm> */
#define SWAP(a,b) std::swap(a, b)
#elif COMPILER_TYPEOF
- /*!
+ /**
* Type-generic macro to swap \a a with \a b.
*
* \note Arguments are evaluated multiple times.
#endif /* COMPILER_TYPEOF */
+/**
+ * Macro to swap \a a with \a b, with explicit type \a T for dumb C89 compilers.
+ *
+ * \note Arguments are evaluated multiple times.
+ */
+#define SWAP_T(a, b, T) \
+ do { \
+ T tmp; \
+ ASSERT_TYPE_IS(a, T); \
+ ASSERT_TYPE_IS(b, T); \
+ tmp = (a); \
+ (a) = (b); \
+ (b) = tmp; \
+ } while (0)
+
+
#ifndef BV
- /*! Convert a bit value to a binary flag. */
+ /** Convert a bit value to a binary flag. */
#define BV(x) (1<<(x))
#endif
-/*! Round up \a x to an even multiple of the 2's power \a pad */
-#define ROUND2(x, pad) (((x) + ((pad) - 1)) & ~((pad) - 1))
+/** Same as BV() but with 32 bit result */
+#define BV32(x) ((uint32_t)1<<(x))
+
+/** Same as BV() but with 16 bit result */
+#define BV16(x) ((uint16_t)1<<(x))
+
+/** Same as BV() but with 8 bit result */
+#define BV8(x) ((uint8_t)1<<(x))
+
+
-/*!
+/** Round up \a x to an even multiple of the 2's power \a pad. */
+#define ROUND_UP2(x, pad) (((x) + ((pad) - 1)) & ~((pad) - 1))
+
+/* OBSOLETE */
+#define ROUND2 ROUND_UP2
+
+/**
* \name Integer round macros.
*
* Round \a x to a multiple of \a base.
#define ROUND_NEAREST(x, base) ( ((x) + (base) / 2) - (((x) + (base) / 2) % (base)) )
/* \} */
-//! Check if \a x is an integer power of 2
+/** Check if \a x is an integer power of 2. */
#define IS_POW2(x) (!(bool)((x) & ((x)-1)))
-/*! Calculate a compile-time log2 for a uint8_t */
+/** Calculate a compile-time log2 for a uint8_t */
#define UINT8_LOG2(x) \
((x) < 2 ? 0 : \
((x) < 4 ? 1 : \
((x) < 64 ? 5 : \
((x) < 128 ? 6 : 7)))))))
-/*! Calculate a compile-time log2 for a uint16_t */
+/** Calculate a compile-time log2 for a uint16_t */
#define UINT16_LOG2(x) \
((x < 256) ? UINT8_LOG2(x) : UINT8_LOG2((x) >> 8) + 8)
-/*! Calculate a compile-time log2 for a uint32_t */
+/** Calculate a compile-time log2 for a uint32_t */
#define UINT32_LOG2(x) \
((x < 65536UL) ? UINT16_LOG2(x) : UINT16_LOG2((x) >> 16) + 16)
#if COMPILER_VARIADIC_MACROS
- /*! Count the number of arguments (up to 16). */
+ /** Count the number of arguments (up to 16). */
#define PP_COUNT(...) \
PP_COUNT__(__VA_ARGS__,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)
#define PP_COUNT__(a0,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,count,...) \
#endif
#if COMPILER_VARIADIC_MACROS
- /*!
+ /**
* \def BIT_CHANGE(reg, (mask, value), ...)
*
* This macro allows for efficient and compact bit toggling in a hardware
* for use with C90 compilers, through Boost Preprocessor.
*/
- /*!
+ /**
* \def BIT_CHANGE_BV(reg, (bit, value), ...)
*
* Similar to BIT_CHANGE(), but get bits instead of masks (and applies BV() to convert
#endif /* COMPILER_VARIADIC_MACROS */
+/**
+ * Macro for rotating bit left or right.
+ * \{
+ */
+#define ROTR(var, rot) (((var) >> (rot)) | ((var) << ((sizeof(var) * 8) - (rot))))
+#define ROTL(var, rot) (((var) << (rot)) | ((var) >> ((sizeof(var) * 8) - (rot))))
+/*\}*/
+
#endif /* MACROS_H */