X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fendianness.h;h=584b62178769ce80cc9fe593e2ef63f236c5ab15;hp=55a832ded50c3767fc884ed3036b581dc952ca34;hb=8f520d21297a3ae557d82b586ad369662714d829;hpb=6f77434ea6ff1407603410e28d1edb966c40e568

diff --git a/src/endianness.h b/src/endianness.h
index 55a832de..584b6217 100644
--- a/src/endianness.h
+++ b/src/endianness.h
@@ -5,93 +5,83 @@
 #include "config.h"
 #include <inttypes.h>
 
-/* Changes the endianness of a 32-bit value. */
+/* Watch out for conflicts with ntfs-3g headers... */
+
+#ifndef bswap16
+static inline uint16_t bswap16(uint16_t n)
+{
+	return (n << 8) | (n >> 8);
+}
+#endif /* ifndef bswap16 */
+
+#ifndef bswap32
 static inline uint32_t bswap32(uint32_t n)
 {
 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
 	return __builtin_bswap32(n);
 #else
-	return (n << 24) | ((n & 0xff00) << 8) | ((n & 0xff0000) >> 8) | 
+	return (n << 24) | ((n & 0xff00) << 8) | ((n & 0xff0000) >> 8) |
 							(n >> 24);
 #endif
 }
+#endif /* ifndef bswap32 */
 
-#ifdef WORDS_BIGENDIAN
-
-/* Big endian. */
-
-/* Changes the endianness of a 16-bit value. */
-static inline uint16_t bswap16(uint16_t n)
-{
-	return (n << 8) | (n >> 8);
-}
-
-
-/* Changes the endianness of a 64-bit value. */
+#ifndef bswap64
 static inline uint64_t bswap64(uint64_t n)
 {
-#ifdef __GNUC__
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
 	return __builtin_bswap64(n);
 #else
-	return (n << 56) | ((n & 0xff00) << 40) | ((n & 0xff0000) << 24) | 
-			((n & 0xff000000) << 8) | ((n & 0xff00000000) >> 8) | 
-			((n & 0xff0000000000) >> 24) | 
+	return (n << 56) | ((n & 0xff00) << 40) | ((n & 0xff0000) << 24) |
+			((n & 0xff000000) << 8) | ((n & 0xff00000000) >> 8) |
+			((n & 0xff0000000000) >> 24) |
 			((n & 0xff000000000000) >> 40) | (n >> 56);
 #endif
 }
+#endif /* ifndef bswap64 */
+
+
+#ifndef _NTFS_ENDIANS_H
+#	ifdef WORDS_BIGENDIAN
+#		define le16_to_cpu(n) bswap16(n)
+#		define le32_to_cpu(n) bswap32(n)
+#		define le64_to_cpu(n) bswap64(n)
+#		define cpu_to_le16(n) bswap16(n)
+#		define cpu_to_le32(n) bswap32(n)
+#		define cpu_to_le64(n) bswap64(n)
+#	else
+#		define cpu_to_le16(n) (n)
+#		define cpu_to_le32(n) (n)
+#		define cpu_to_le64(n) (n)
+#		define le16_to_cpu(n) (n)
+#		define le32_to_cpu(n) (n)
+#		define le64_to_cpu(n) (n)
+#	endif
+#endif
 
-/* Not in place */
-#define to_le16(n) bswap16(n)
-#define to_le32(n) bswap32(n)
-#define to_le64(n) bswap64(n)
-#define to_be16(n) (n)
-#define to_be32(n) (n)
-#define to_be64(n) (n)
-
-/* In place */
-#define TO_LE16(n) (n = to_le16(n))
-#define TO_LE32(n) (n = to_le32(n))
-#define TO_LE64(n) (n = to_le64(n))
-
-static inline void array_to_le16(uint16_t *p, uint64_t n)
+static inline void array_cpu_to_le32(uint32_t *p, size_t n)
 {
-	while (n--)
-		*p++ = to_le16(*p);
+	for (size_t i = 0; i < n; i++)
+		p[i] = cpu_to_le32(p[i]);
 }
-static inline void array_to_le32(uint32_t *p, uint64_t n)
+
+static inline void array_le32_to_cpu(uint32_t *p, size_t n)
 {
-	while (n--)
-		*p++ = to_le32(*p);
+	for (size_t i = 0; i < n; i++)
+		p[i] = le32_to_cpu(p[i]);
 }
-static inline void array_to_le64(uint64_t *p, uint64_t n)
+
+static inline void array_cpu_to_le64(uint64_t *p, size_t n)
 {
-	while (n--)
-		*p++ = to_le64(*p);
+	for (size_t i = 0; i < n; i++)
+		p[i] = cpu_to_le64(p[i]);
 }
 
-#else
-
-/* Little endian. */
-
-/* Not in place */
-#define to_le16(n) (n)
-#define to_le32(n) (n)
-#define to_le64(n) (n)
-
-#define to_be16(n) (bswap16(n))
-#define to_be32(n) (bswap32(n))
-#define to_be64(n) (bswap64(n))
-
-/* In place */
-#define TO_LE16(n)
-#define TO_LE32(n)
-#define TO_LE64(n)
-
-#define array_to_le16(p, n)
-#define array_to_le32(p, n)
-#define array_to_le64(p, n)
-
-#endif
+static inline void array_le64_to_cpu(uint64_t *p, size_t n)
+{
+	for (size_t i = 0; i < n; i++)
+		p[i] = le64_to_cpu(p[i]);
+}
 
 
 #endif /* _WIMLIB_ENDIANNESS_H */