#ifndef LLVM_SUPPORT_ENDIAN_H
#define LLVM_SUPPORT_ENDIAN_H
-#include "llvm/Config/config.h"
-#include "llvm/System/SwapByteOrder.h"
+#include "llvm/Support/Host.h"
+#include "llvm/Support/SwapByteOrder.h"
#include "llvm/Support/type_traits.h"
namespace llvm {
enum endianness {big, little};
enum alignment {unaligned, aligned};
-template<typename value_type, int host, int target>
-static typename enable_if_c<host == target, value_type>::type
-SwapByteOrderIfDifferent(value_type value) {
- // Target endianess is the same as the host. Just pass the value through.
- return value;
-}
-
-template<typename value_type, int host, int target>
-static typename enable_if_c<host != target, value_type>::type
-SwapByteOrderIfDifferent(value_type value) {
- return sys::SwapByteOrder<value_type>(value);
-}
-
namespace detail {
template<typename value_type, alignment align>
} // end namespace detail
-#if defined(LLVM_IS_HOST_BIG_ENDIAN) \
- || defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
-static const endianness host_endianness = big;
-#else
-static const endianness host_endianness = little;
-#endif
-
-struct endian {
+namespace endian {
template<typename value_type, alignment align>
- static value_type read_le(const void *memory) {
- return SwapByteOrderIfDifferent<value_type, host_endianness, little>(
+ inline value_type read_le(const void *memory) {
+ value_type t =
reinterpret_cast<const detail::alignment_access_helper
- <value_type, align> *>(memory)->val);
+ <value_type, align> *>(memory)->val;
+ if (sys::isBigEndianHost())
+ return sys::SwapByteOrder(t);
+ return t;
}
template<typename value_type, alignment align>
- static void write_le(void *memory, value_type value) {
+ inline void write_le(void *memory, value_type value) {
+ if (sys::isBigEndianHost())
+ value = sys::SwapByteOrder(value);
reinterpret_cast<detail::alignment_access_helper<value_type, align> *>
- (memory)->val =
- SwapByteOrderIfDifferent< value_type
- , host_endianness
- , little>(value);
+ (memory)->val = value;
}
template<typename value_type, alignment align>
- static value_type read_be(const void *memory) {
- return SwapByteOrderIfDifferent<value_type, host_endianness, big>(
+ inline value_type read_be(const void *memory) {
+ value_type t =
reinterpret_cast<const detail::alignment_access_helper
- <value_type, align> *>(memory)->val);
+ <value_type, align> *>(memory)->val;
+ if (sys::isLittleEndianHost())
+ return sys::SwapByteOrder(t);
+ return t;
}
template<typename value_type, alignment align>
- static void write_be(void *memory, value_type value) {
- reinterpret_cast<detail::alignment_access_helper
- <value_type, align> *>(memory)->val =
- SwapByteOrderIfDifferent< value_type
- , host_endianness
- , big>(value);
+ inline void write_be(void *memory, value_type value) {
+ if (sys::isLittleEndianHost())
+ value = sys::SwapByteOrder(value);
+ reinterpret_cast<detail::alignment_access_helper<value_type, align> *>
+ (memory)->val = value;
}
-};
+}
namespace detail {
template<typename value_type,
- endianness target_endianness,
- alignment target_alignment>
+ endianness endian,
+ alignment align>
class packed_endian_specific_integral;
template<typename value_type>
operator value_type() const {
return endian::read_le<value_type, unaligned>(Value);
}
+ void operator=(value_type newValue) {
+ endian::write_le<value_type, unaligned>((void *)&Value, newValue);
+ }
private:
uint8_t Value[sizeof(value_type)];
};
operator value_type() const {
return endian::read_be<value_type, unaligned>(Value);
}
+ void operator=(value_type newValue) {
+ endian::write_be<value_type, unaligned>((void *)&Value, newValue);
+ }
private:
uint8_t Value[sizeof(value_type)];
};
operator value_type() const {
return endian::read_le<value_type, aligned>(&Value);
}
+ void operator=(value_type newValue) {
+ endian::write_le<value_type, aligned>((void *)&Value, newValue);
+ }
private:
value_type Value;
};
operator value_type() const {
return endian::read_be<value_type, aligned>(&Value);
}
+ void operator=(value_type newValue) {
+ endian::write_be<value_type, aligned>((void *)&Value, newValue);
+ }
private:
value_type Value;
};