Support: Add {read,write}{16,32,64}{le,be} functions.

Add convenient functions for endian-aware reads/writes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231002 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/Support/Endian.h b/include/llvm/Support/Endian.h
index 47b82fd..db85c65 100644 (file)
--- a/include/llvm/Support/Endian.h
+++ b/include/llvm/Support/Endian.h
@@ -195,7 +195,23 @@ typedef detail::packed_endian_specific_integral
                    <int32_t, native, unaligned> unaligned_int32_t;
 typedef detail::packed_endian_specific_integral
                    <int64_t, native, unaligned> unaligned_int64_t;
-} // end namespace llvm
+
+namespace endian {
+inline uint16_t read16le(const void *p) { return *(ulittle16_t *)p; }
+inline uint32_t read32le(const void *p) { return *(ulittle32_t *)p; }
+inline uint64_t read64le(const void *p) { return *(ulittle64_t *)p; }
+inline uint16_t read16be(const void *p) { return *(ubig16_t *)p; }
+inline uint32_t read32be(const void *p) { return *(ubig32_t *)p; }
+inline uint64_t read64be(const void *p) { return *(ubig64_t *)p; }
+
+inline void write16le(void *p, uint16_t v) { *(ulittle16_t *)p = v; }
+inline void write32le(void *p, uint32_t v) { *(ulittle32_t *)p = v; }
+inline void write64le(void *p, uint64_t v) { *(ulittle64_t *)p = v; }
+inline void write16be(void *p, uint16_t v) { *(ubig16_t *)p = v; }
+inline void write32be(void *p, uint32_t v) { *(ubig32_t *)p = v; }
+inline void write64be(void *p, uint64_t v) { *(ubig64_t *)p = v; }
+} // end namespace endian
 } // end namespace support
+} // end namespace llvm
 
 #endif