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Diffstat (limited to 'vendor/gimli/src/endianity.rs')
| -rw-r--r-- | vendor/gimli/src/endianity.rs | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/vendor/gimli/src/endianity.rs b/vendor/gimli/src/endianity.rs deleted file mode 100644 index 3201551..0000000 --- a/vendor/gimli/src/endianity.rs +++ /dev/null @@ -1,256 +0,0 @@ -//! Types for compile-time and run-time endianity. - -use core::convert::TryInto; -use core::fmt::Debug; - -/// A trait describing the endianity of some buffer. -pub trait Endianity: Debug + Default + Clone + Copy + PartialEq + Eq { - /// Return true for big endian byte order. - fn is_big_endian(self) -> bool; - - /// Return true for little endian byte order. - #[inline] - fn is_little_endian(self) -> bool { - !self.is_big_endian() - } - - /// Reads an unsigned 16 bit integer from `buf`. - /// - /// # Panics - /// - /// Panics when `buf.len() < 2`. - #[inline] - fn read_u16(self, buf: &[u8]) -> u16 { - let bytes: &[u8; 2] = buf[..2].try_into().unwrap(); - if self.is_big_endian() { - u16::from_be_bytes(*bytes) - } else { - u16::from_le_bytes(*bytes) - } - } - - /// Reads an unsigned 32 bit integer from `buf`. - /// - /// # Panics - /// - /// Panics when `buf.len() < 4`. - #[inline] - fn read_u32(self, buf: &[u8]) -> u32 { - let bytes: &[u8; 4] = buf[..4].try_into().unwrap(); - if self.is_big_endian() { - u32::from_be_bytes(*bytes) - } else { - u32::from_le_bytes(*bytes) - } - } - - /// Reads an unsigned 64 bit integer from `buf`. - /// - /// # Panics - /// - /// Panics when `buf.len() < 8`. - #[inline] - fn read_u64(self, buf: &[u8]) -> u64 { - let bytes: &[u8; 8] = buf[..8].try_into().unwrap(); - if self.is_big_endian() { - u64::from_be_bytes(*bytes) - } else { - u64::from_le_bytes(*bytes) - } - } - - /// Read an unsigned n-bytes integer u64. - /// - /// # Panics - /// - /// Panics when `buf.len() < 1` or `buf.len() > 8`. - #[inline] - fn read_uint(&mut self, buf: &[u8]) -> u64 { - let mut tmp = [0; 8]; - if self.is_big_endian() { - tmp[8 - buf.len()..].copy_from_slice(buf); - } else { - tmp[..buf.len()].copy_from_slice(buf); - } - self.read_u64(&tmp) - } - - /// Reads a signed 16 bit integer from `buf`. - /// - /// # Panics - /// - /// Panics when `buf.len() < 2`. - #[inline] - fn read_i16(self, buf: &[u8]) -> i16 { - self.read_u16(buf) as i16 - } - - /// Reads a signed 32 bit integer from `buf`. - /// - /// # Panics - /// - /// Panics when `buf.len() < 4`. - #[inline] - fn read_i32(self, buf: &[u8]) -> i32 { - self.read_u32(buf) as i32 - } - - /// Reads a signed 64 bit integer from `buf`. - /// - /// # Panics - /// - /// Panics when `buf.len() < 8`. - #[inline] - fn read_i64(self, buf: &[u8]) -> i64 { - self.read_u64(buf) as i64 - } - - /// Reads a 32 bit floating point number from `buf`. - /// - /// # Panics - /// - /// Panics when `buf.len() < 8`. - #[inline] - fn read_f32(self, buf: &[u8]) -> f32 { - f32::from_bits(self.read_u32(buf)) - } - - /// Reads a 32 bit floating point number from `buf`. - /// - /// # Panics - /// - /// Panics when `buf.len() < 8`. - #[inline] - fn read_f64(self, buf: &[u8]) -> f64 { - f64::from_bits(self.read_u64(buf)) - } - - /// Writes an unsigned 16 bit integer `n` to `buf`. - /// - /// # Panics - /// - /// Panics when `buf.len() < 2`. - #[inline] - fn write_u16(self, buf: &mut [u8], n: u16) { - let bytes = if self.is_big_endian() { - n.to_be_bytes() - } else { - n.to_le_bytes() - }; - buf[..2].copy_from_slice(&bytes); - } - - /// Writes an unsigned 32 bit integer `n` to `buf`. - /// - /// # Panics - /// - /// Panics when `buf.len() < 4`. - #[inline] - fn write_u32(self, buf: &mut [u8], n: u32) { - let bytes = if self.is_big_endian() { - n.to_be_bytes() - } else { - n.to_le_bytes() - }; - buf[..4].copy_from_slice(&bytes); - } - - /// Writes an unsigned 64 bit integer `n` to `buf`. - /// - /// # Panics - /// - /// Panics when `buf.len() < 8`. - #[inline] - fn write_u64(self, buf: &mut [u8], n: u64) { - let bytes = if self.is_big_endian() { - n.to_be_bytes() - } else { - n.to_le_bytes() - }; - buf[..8].copy_from_slice(&bytes); - } -} - -/// Byte order that is selectable at runtime. -#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] -pub enum RunTimeEndian { - /// Little endian byte order. - Little, - /// Big endian byte order. - Big, -} - -impl Default for RunTimeEndian { - #[cfg(target_endian = "little")] - #[inline] - fn default() -> RunTimeEndian { - RunTimeEndian::Little - } - - #[cfg(target_endian = "big")] - #[inline] - fn default() -> RunTimeEndian { - RunTimeEndian::Big - } -} - -impl Endianity for RunTimeEndian { - #[inline] - fn is_big_endian(self) -> bool { - self != RunTimeEndian::Little - } -} - -/// Little endian byte order. -#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] -pub struct LittleEndian; - -impl Default for LittleEndian { - #[inline] - fn default() -> LittleEndian { - LittleEndian - } -} - -impl Endianity for LittleEndian { - #[inline] - fn is_big_endian(self) -> bool { - false - } -} - -/// Big endian byte order. -#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] -pub struct BigEndian; - -impl Default for BigEndian { - #[inline] - fn default() -> BigEndian { - BigEndian - } -} - -impl Endianity for BigEndian { - #[inline] - fn is_big_endian(self) -> bool { - true - } -} - -/// The native endianity for the target platform. -#[cfg(target_endian = "little")] -pub type NativeEndian = LittleEndian; - -#[cfg(target_endian = "little")] -#[allow(non_upper_case_globals)] -#[doc(hidden)] -pub const NativeEndian: LittleEndian = LittleEndian; - -/// The native endianity for the target platform. -#[cfg(target_endian = "big")] -pub type NativeEndian = BigEndian; - -#[cfg(target_endian = "big")] -#[allow(non_upper_case_globals)] -#[doc(hidden)] -pub const NativeEndian: BigEndian = BigEndian; 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