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Add byteswap intrinsics for converting from big/little to host endian

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These are similar to the ntoh[s|l] functions in C and have the style of
from_[be|le][16|32|64].
This commit is contained in:
Carl-Anton Ingmarsson 2014-01-01 19:00:22 +01:00
parent c34ef5d7e4
commit 3abc633658
1 changed files with 13 additions and 0 deletions
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13
src/libstd/unstable/intrinsics.rs
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@ -500,6 +500,19 @@ extern "rust-intrinsic" {
#[cfg(target_endian = "little")] pub fn to_be64(x: i64) -> i64 { unsafe { bswap64(x) } }
#[cfg(target_endian = "big")] pub fn to_be64(x: i64) -> i64 { x }
#[cfg(target_endian = "little")] pub fn from_le16(x: i16) -> i16 { x }
#[cfg(target_endian = "big")] pub fn from_le16(x: i16) -> i16 { unsafe { bswap16(x) } }
#[cfg(target_endian = "little")] pub fn from_le32(x: i32) -> i32 { x }
#[cfg(target_endian = "big")] pub fn from_le32(x: i32) -> i32 { unsafe { bswap32(x) } }
#[cfg(target_endian = "little")] pub fn from_le64(x: i64) -> i64 { x }
#[cfg(target_endian = "big")] pub fn from_le64(x: i64) -> i64 { unsafe { bswap64(x) } }
#[cfg(target_endian = "little")] pub fn from_be16(x: i16) -> i16 { unsafe { bswap16(x) } }
#[cfg(target_endian = "big")] pub fn from_be16(x: i16) -> i16 { x }
#[cfg(target_endian = "little")] pub fn from_be32(x: i32) -> i32 { unsafe { bswap32(x) } }
#[cfg(target_endian = "big")] pub fn from_be32(x: i32) -> i32 { x }
#[cfg(target_endian = "little")] pub fn from_be64(x: i64) -> i64 { unsafe { bswap64(x) } }
#[cfg(target_endian = "big")] pub fn from_be64(x: i64) -> i64 { x }
/// `TypeId` represents a globally unique identifier for a type
#[lang="type_id"] // This needs to be kept in lockstep with the code in trans/intrinsic.rs and