* Collection of useful common types and macros definitions
*****************************************************************************
* Copyright (C) 1998, 1999, 2000 VideoLAN
- * $Id: vlc_common.h,v 1.8 2002/07/05 11:18:56 sam Exp $
+ * $Id: vlc_common.h,v 1.9 2002/07/12 21:57:25 massiot Exp $
*
* Authors: Samuel Hocevar <sam@via.ecp.fr>
* Vincent Seguin <seguin@via.ecp.fr>
#ifdef NTOHL_IN_SYS_PARAM_H
# include <sys/param.h>
-#elif defined(WIN32)
-/* Swap bytes in 16 bit value. */
-# define __bswap_constant_16(x) \
- ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
-
-# if defined __GNUC__ && __GNUC__ >= 2
-# define __bswap_16(x) \
- (__extension__ \
- ({ register unsigned short int __v; \
- if (__builtin_constant_p (x)) \
- __v = __bswap_constant_16 (x); \
- else \
- __asm__ __volatile__ ("rorw $8, %w0" \
- : "=r" (__v) \
- : "0" ((unsigned short int) (x)) \
- : "cc"); \
- __v; }))
-# else
-/* This is better than nothing. */
-# define __bswap_16(x) __bswap_constant_16 (x)
-# endif
-
-/* Swap bytes in 32 bit value. */
-# define __bswap_constant_32(x) \
- ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
- (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
-
-# if defined __GNUC__ && __GNUC__ >= 2
-/* To swap the bytes in a word the i486 processors and up provide the
- `bswap' opcode. On i386 we have to use three instructions. */
-# if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__
-# define __bswap_32(x) \
- (__extension__ \
- ({ register unsigned int __v; \
- if (__builtin_constant_p (x)) \
- __v = __bswap_constant_32 (x); \
- else \
- __asm__ __volatile__ ("rorw $8, %w0;" \
- "rorl $16, %0;" \
- "rorw $8, %w0" \
- : "=r" (__v) \
- : "0" ((unsigned int) (x)) \
- : "cc"); \
- __v; }))
-# else
-# define __bswap_32(x) \
- (__extension__ \
- ({ register unsigned int __v; \
- if (__builtin_constant_p (x)) \
- __v = __bswap_constant_32 (x); \
- else \
- __asm__ __volatile__ ("bswap %0" \
- : "=r" (__v) \
- : "0" ((unsigned int) (x))); \
- __v; }))
-# endif
-# else
-# define __bswap_32(x) __bswap_constant_32 (x)
-# endif
-
-# if defined __GNUC__ && __GNUC__ >= 2
-/* Swap bytes in 64 bit value. */
-# define __bswap_constant_64(x) \
- ((((x) & 0xff00000000000000ull) >> 56) \
- | (((x) & 0x00ff000000000000ull) >> 40) \
- | (((x) & 0x0000ff0000000000ull) >> 24) \
- | (((x) & 0x000000ff00000000ull) >> 8) \
- | (((x) & 0x00000000ff000000ull) << 8) \
- | (((x) & 0x0000000000ff0000ull) << 24) \
- | (((x) & 0x000000000000ff00ull) << 40) \
- | (((x) & 0x00000000000000ffull) << 56))
-
-# define __bswap_64(x) \
- (__extension__ \
- ({ union { __extension__ unsigned long long int __ll; \
- unsigned long int __l[2]; } __w, __r; \
- if (__builtin_constant_p (x)) \
- __r.__ll = __bswap_constant_64 (x); \
- else \
- { \
- __w.__ll = (x); \
- __r.__l[0] = __bswap_32 (__w.__l[1]); \
- __r.__l[1] = __bswap_32 (__w.__l[0]); \
- } \
- __r.__ll; }))
-# else
-# define __bswap_64(i) \
- (u64)((__bswap_32((i) & 0xffffffff) << 32) | \
- __bswap_32(((i) >> 32) & 0xffffffff ))
-# endif
-
-#else /* NTOHL_IN_SYS_PARAM_H || WIN32 */
+#elif !defined(WIN32) /* NTOHL_IN_SYS_PARAM_H || WIN32 */
# include <netinet/in.h>
#endif /* NTOHL_IN_SYS_PARAM_H || WIN32 */
/* MSB (big endian)/LSB (little endian) conversions - network order is always
* MSB, and should be used for both network communications and files. Note that
* byte orders other than little and big endians are not supported, but only
- * the VAX seems to have such exotic properties - note that these 'functions'
- * needs <netinet/in.h> or the local equivalent. */
-#if !defined( WIN32 )
+ * the VAX seems to have such exotic properties. */
+static inline u16 U16_AT( void * _p )
+{
+ u8 * p = (u8 *)_p;
+ return ( ((u16)p[0] << 8) | p[1] );
+}
+static inline u32 U32_AT( void * _p )
+{
+ u8 * p = (u8 *)_p;
+ return ( ((u32)p[0] << 24) | ((u32)p[1] << 16) | ((u32)p[2] << 8) | p[3] );
+}
+static inline u64 U64_AT( void * _p )
+{
+ u8 * p = (u8 *)_p;
+ return ( ((u64)p[0] << 56) | ((u64)p[1] << 48) | ((u64)p[2] << 40)
+ | ((u64)p[3] << 32) | ((u64)p[4] << 24) | ((u64)p[5] << 16)
+ | ((u64)p[6] << 8) | p[7] );
+}
#if WORDS_BIGENDIAN
-# define hton16 htons
-# define hton32 htonl
+# define hton16(i) ( i )
+# define hton32(i) ( i )
# define hton64(i) ( i )
-# define ntoh16 ntohs
-# define ntoh32 ntohl
+# define ntoh16(i) ( i )
+# define ntoh32(i) ( i )
# define ntoh64(i) ( i )
#else
-# define hton16 htons
-# define hton32 htonl
- static inline u64 __hton64( u64 i )
- {
- return ((u64)(htonl((i) & 0xffffffff)) << 32)
- | htonl(((i) >> 32) & 0xffffffff );
- }
-# define hton64(i) __hton64( i )
-# define ntoh16 ntohs
-# define ntoh32 ntohl
-# define ntoh64 hton64
+# define hton16(i) U16_AT(&i)
+# define hton32(i) U32_AT(&i)
+# define hton64(i) U64_AT(&i)
+# define ntoh16(i) U16_AT(&i)
+# define ntoh32(i) U32_AT(&i)
+# define ntoh64(i) U64_AT(&i)
#endif
-#endif /* !defined( WIN32 ) */
-
-/* Macros with automatic casts */
-#define U64_AT(p) ( ntoh64 ( *( (u64 *)(p) ) ) )
-#define U32_AT(p) ( ntoh32 ( *( (u32 *)(p) ) ) )
-#define U16_AT(p) ( ntoh16 ( *( (u16 *)(p) ) ) )
/* Alignment of critical static data structures */
#ifdef ATTRIBUTE_ALIGNED_MAX
#define I64C(x) x##LL
-
-#if defined( WIN32 )
-/* The ntoh* and hton* bytes swapping functions are provided by winsock
- * but for conveniency and speed reasons it is better to implement them
- * ourselves. ( several plugins use them and it is too much hassle to link
- * winsock with each of them ;-)
- */
-# ifdef WORDS_BIGENDIAN
-# define ntoh32(x) (x)
-# define ntoh16(x) (x)
-# define ntoh64(x) (x)
-# define hton32(x) (x)
-# define hton16(x) (x)
-# define hton64(x) (x)
-# else
-# define ntoh32(x) __bswap_32 (x)
-# define ntoh16(x) __bswap_16 (x)
-# define ntoh64(x) __bswap_32 (x)
-# define hton32(x) __bswap_32 (x)
-# define hton16(x) __bswap_16 (x)
-# define hton64(x) __bswap_64 (x)
-# endif
-
+#ifdef WIN32
/* win32, cl and icl support */
# if defined( _MSC_VER ) || !defined( __MINGW32__ )
# define __attribute__(x)
projects / vlc / blobdiff