1 files changed, 523 insertions, 0 deletions
diff --git a/vendor/tiff/src/encoder/tiff_value.rs b/vendor/tiff/src/encoder/tiff_value.rs
new file mode 100644
index 0000000..43653f4
--- /dev/null
+++ b/vendor/tiff/src/encoder/tiff_value.rs
@@ -0,0 +1,523 @@
+use std::{borrow::Cow, io::Write, slice::from_ref};
+
+use crate::{bytecast, tags::Type, TiffError, TiffFormatError, TiffResult};
+
+use super::writer::TiffWriter;
+
+/// Trait for types that can be encoded in a tiff file
+pub trait TiffValue {
+    const BYTE_LEN: u8;
+    const FIELD_TYPE: Type;
+    fn count(&self) -> usize;
+    fn bytes(&self) -> usize {
+        self.count() * usize::from(Self::BYTE_LEN)
+    }
+
+    /// Access this value as an contiguous sequence of bytes.
+    /// If their is no trivial representation, allocate it on the heap.
+    fn data(&self) -> Cow<[u8]>;
+
+    /// Write this value to a TiffWriter.
+    /// While the default implementation will work in all cases, it may require unnecessary allocations.
+    /// The written bytes of any custom implementation MUST be the same as yielded by `self.data()`.
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_bytes(&self.data())?;
+        Ok(())
+    }
+}
+
+impl TiffValue for [u8] {
+    const BYTE_LEN: u8 = 1;
+    const FIELD_TYPE: Type = Type::BYTE;
+
+    fn count(&self) -> usize {
+        self.len()
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(self)
+    }
+}
+
+impl TiffValue for [i8] {
+    const BYTE_LEN: u8 = 1;
+    const FIELD_TYPE: Type = Type::SBYTE;
+
+    fn count(&self) -> usize {
+        self.len()
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::i8_as_ne_bytes(self))
+    }
+}
+
+impl TiffValue for [u16] {
+    const BYTE_LEN: u8 = 2;
+    const FIELD_TYPE: Type = Type::SHORT;
+
+    fn count(&self) -> usize {
+        self.len()
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::u16_as_ne_bytes(self))
+    }
+}
+
+impl TiffValue for [i16] {
+    const BYTE_LEN: u8 = 2;
+    const FIELD_TYPE: Type = Type::SSHORT;
+
+    fn count(&self) -> usize {
+        self.len()
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::i16_as_ne_bytes(self))
+    }
+}
+
+impl TiffValue for [u32] {
+    const BYTE_LEN: u8 = 4;
+    const FIELD_TYPE: Type = Type::LONG;
+
+    fn count(&self) -> usize {
+        self.len()
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::u32_as_ne_bytes(self))
+    }
+}
+
+impl TiffValue for [i32] {
+    const BYTE_LEN: u8 = 4;
+    const FIELD_TYPE: Type = Type::SLONG;
+
+    fn count(&self) -> usize {
+        self.len()
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::i32_as_ne_bytes(self))
+    }
+}
+
+impl TiffValue for [u64] {
+    const BYTE_LEN: u8 = 8;
+    const FIELD_TYPE: Type = Type::LONG8;
+
+    fn count(&self) -> usize {
+        self.len()
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::u64_as_ne_bytes(self))
+    }
+}
+
+impl TiffValue for [i64] {
+    const BYTE_LEN: u8 = 8;
+    const FIELD_TYPE: Type = Type::SLONG8;
+
+    fn count(&self) -> usize {
+        self.len()
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::i64_as_ne_bytes(self))
+    }
+}
+
+impl TiffValue for [f32] {
+    const BYTE_LEN: u8 = 4;
+    const FIELD_TYPE: Type = Type::FLOAT;
+
+    fn count(&self) -> usize {
+        self.len()
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        // We write using native endian so this should be safe
+        Cow::Borrowed(bytecast::f32_as_ne_bytes(self))
+    }
+}
+
+impl TiffValue for [f64] {
+    const BYTE_LEN: u8 = 8;
+    const FIELD_TYPE: Type = Type::DOUBLE;
+
+    fn count(&self) -> usize {
+        self.len()
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        // We write using native endian so this should be safe
+        Cow::Borrowed(bytecast::f64_as_ne_bytes(self))
+    }
+}
+
+impl TiffValue for u8 {
+    const BYTE_LEN: u8 = 1;
+    const FIELD_TYPE: Type = Type::BYTE;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_u8(*self)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(from_ref(self))
+    }
+}
+
+impl TiffValue for i8 {
+    const BYTE_LEN: u8 = 1;
+    const FIELD_TYPE: Type = Type::SBYTE;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_i8(*self)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::i8_as_ne_bytes(from_ref(self)))
+    }
+}
+
+impl TiffValue for u16 {
+    const BYTE_LEN: u8 = 2;
+    const FIELD_TYPE: Type = Type::SHORT;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_u16(*self)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::u16_as_ne_bytes(from_ref(self)))
+    }
+}
+
+impl TiffValue for i16 {
+    const BYTE_LEN: u8 = 2;
+    const FIELD_TYPE: Type = Type::SSHORT;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_i16(*self)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::i16_as_ne_bytes(from_ref(self)))
+    }
+}
+
+impl TiffValue for u32 {
+    const BYTE_LEN: u8 = 4;
+    const FIELD_TYPE: Type = Type::LONG;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_u32(*self)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::u32_as_ne_bytes(from_ref(self)))
+    }
+}
+
+impl TiffValue for i32 {
+    const BYTE_LEN: u8 = 4;
+    const FIELD_TYPE: Type = Type::SLONG;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_i32(*self)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::i32_as_ne_bytes(from_ref(self)))
+    }
+}
+
+impl TiffValue for u64 {
+    const BYTE_LEN: u8 = 8;
+    const FIELD_TYPE: Type = Type::LONG8;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_u64(*self)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::u64_as_ne_bytes(from_ref(self)))
+    }
+}
+
+impl TiffValue for i64 {
+    const BYTE_LEN: u8 = 8;
+    const FIELD_TYPE: Type = Type::SLONG8;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_i64(*self)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::i64_as_ne_bytes(from_ref(self)))
+    }
+}
+
+impl TiffValue for f32 {
+    const BYTE_LEN: u8 = 4;
+    const FIELD_TYPE: Type = Type::FLOAT;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_f32(*self)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::f32_as_ne_bytes(from_ref(self)))
+    }
+}
+
+impl TiffValue for f64 {
+    const BYTE_LEN: u8 = 8;
+    const FIELD_TYPE: Type = Type::DOUBLE;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_f64(*self)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::f64_as_ne_bytes(from_ref(self)))
+    }
+}
+
+impl TiffValue for Ifd {
+    const BYTE_LEN: u8 = 4;
+    const FIELD_TYPE: Type = Type::IFD;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_u32(self.0)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::u32_as_ne_bytes(from_ref(&self.0)))
+    }
+}
+
+impl TiffValue for Ifd8 {
+    const BYTE_LEN: u8 = 8;
+    const FIELD_TYPE: Type = Type::IFD8;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_u64(self.0)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Borrowed(bytecast::u64_as_ne_bytes(from_ref(&self.0)))
+    }
+}
+
+impl TiffValue for Rational {
+    const BYTE_LEN: u8 = 8;
+    const FIELD_TYPE: Type = Type::RATIONAL;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_u32(self.n)?;
+        writer.write_u32(self.d)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Owned({
+            let first_dword = bytecast::u32_as_ne_bytes(from_ref(&self.n));
+            let second_dword = bytecast::u32_as_ne_bytes(from_ref(&self.d));
+            [first_dword, second_dword].concat()
+        })
+    }
+}
+
+impl TiffValue for SRational {
+    const BYTE_LEN: u8 = 8;
+    const FIELD_TYPE: Type = Type::SRATIONAL;
+
+    fn count(&self) -> usize {
+        1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        writer.write_i32(self.n)?;
+        writer.write_i32(self.d)?;
+        Ok(())
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Owned({
+            let first_dword = bytecast::i32_as_ne_bytes(from_ref(&self.n));
+            let second_dword = bytecast::i32_as_ne_bytes(from_ref(&self.d));
+            [first_dword, second_dword].concat()
+        })
+    }
+}
+
+impl TiffValue for str {
+    const BYTE_LEN: u8 = 1;
+    const FIELD_TYPE: Type = Type::ASCII;
+
+    fn count(&self) -> usize {
+        self.len() + 1
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        if self.is_ascii() && !self.bytes().any(|b| b == 0) {
+            writer.write_bytes(self.as_bytes())?;
+            writer.write_u8(0)?;
+            Ok(())
+        } else {
+            Err(TiffError::FormatError(TiffFormatError::InvalidTag))
+        }
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        Cow::Owned({
+            if self.is_ascii() && !self.bytes().any(|b| b == 0) {
+                let bytes: &[u8] = self.as_bytes();
+                [bytes, &[0]].concat()
+            } else {
+                vec![]
+            }
+        })
+    }
+}
+
+impl<'a, T: TiffValue + ?Sized> TiffValue for &'a T {
+    const BYTE_LEN: u8 = T::BYTE_LEN;
+    const FIELD_TYPE: Type = T::FIELD_TYPE;
+
+    fn count(&self) -> usize {
+        (*self).count()
+    }
+
+    fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+        (*self).write(writer)
+    }
+
+    fn data(&self) -> Cow<[u8]> {
+        T::data(self)
+    }
+}
+
+macro_rules! impl_tiff_value_for_contiguous_sequence {
+    ($inner_type:ty; $bytes:expr; $field_type:expr) => {
+        impl $crate::encoder::TiffValue for [$inner_type] {
+            const BYTE_LEN: u8 = $bytes;
+            const FIELD_TYPE: Type = $field_type;
+
+            fn count(&self) -> usize {
+                self.len()
+            }
+
+            fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
+                for x in self {
+                    x.write(writer)?;
+                }
+                Ok(())
+            }
+
+            fn data(&self) -> Cow<[u8]> {
+                let mut buf: Vec<u8> = Vec::with_capacity(Self::BYTE_LEN as usize * self.len());
+                for x in self {
+                    buf.extend_from_slice(&x.data());
+                }
+                Cow::Owned(buf)
+            }
+        }
+    };
+}
+
+impl_tiff_value_for_contiguous_sequence!(Ifd; 4; Type::IFD);
+impl_tiff_value_for_contiguous_sequence!(Ifd8; 8; Type::IFD8);
+impl_tiff_value_for_contiguous_sequence!(Rational; 8; Type::RATIONAL);
+impl_tiff_value_for_contiguous_sequence!(SRational; 8; Type::SRATIONAL);
+
+/// Type to represent tiff values of type `IFD`
+#[derive(Clone)]
+pub struct Ifd(pub u32);
+
+/// Type to represent tiff values of type `IFD8`
+#[derive(Clone)]
+pub struct Ifd8(pub u64);
+
+/// Type to represent tiff values of type `RATIONAL`
+#[derive(Clone)]
+pub struct Rational {
+    pub n: u32,
+    pub d: u32,
+}
+
+/// Type to represent tiff values of type `SRATIONAL`
+#[derive(Clone)]
+pub struct SRational {
+    pub n: i32,
+    pub d: i32,
+}