Merging upstream version 1.74.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 165 insertions, 0 deletions

diff --git a/vendor/windows-metadata/src/blob.rs b/vendor/windows-metadata/src/blob.rs
new file mode 100644
index 000000000..a54336db1
--- /dev/null
+++ b/vendor/windows-metadata/src/blob.rs
@@ -0,0 +1,165 @@
+use super::*;
+
+pub struct Blob<'a> {
+    pub file: usize,
+    pub slice: &'a [u8],
+}
+
+impl<'a> std::ops::Deref for Blob<'a> {
+    type Target = [u8];
+
+    fn deref(&self) -> &[u8] {
+        self.slice
+    }
+}
+
+impl<'a> Blob<'a> {
+    pub fn new(file: usize, slice: &'a [u8]) -> Self {
+        Self { file, slice }
+    }
+
+    pub fn peek_usize(&self) -> (usize, usize) {
+        if self[0] & 0x80 == 0 {
+            (self[0] as usize, 1)
+        } else if self[0] & 0xC0 == 0x80 {
+            ((((self[0] & 0x3F) as usize) << 8) | self[1] as usize, 2)
+        } else {
+            ((((self[0] & 0x1F) as usize) << 24) | (self[1] as usize) << 16 | (self[2] as usize) << 8 | self[3] as usize, 4)
+        }
+    }
+
+    pub fn read_usize(&mut self) -> usize {
+        let (value, offset) = self.peek_usize();
+        self.offset(offset);
+        value
+    }
+
+    pub fn read_expected(&mut self, expected: usize) -> bool {
+        let (value, offset) = self.peek_usize();
+        if value == expected {
+            self.offset(offset);
+            true
+        } else {
+            false
+        }
+    }
+
+    pub fn read_modifiers(&mut self) -> Vec<TypeDefOrRef> {
+        let mut mods = vec![];
+        loop {
+            let (value, offset) = self.peek_usize();
+            if value != ELEMENT_TYPE_CMOD_OPT as usize && value != ELEMENT_TYPE_CMOD_REQD as usize {
+                break;
+            } else {
+                self.offset(offset);
+                mods.push(TypeDefOrRef::decode(self.file, self.read_usize()))
+            }
+        }
+        mods
+    }
+
+    pub fn read_str(&mut self) -> &str {
+        let len = self.read_usize();
+        let value = unsafe { std::str::from_utf8_unchecked(&self.slice[..len]) };
+        self.offset(len);
+        value
+    }
+
+    pub fn read_string(self) -> String {
+        let slice = self.slice;
+        if slice.as_ptr().align_offset(std::mem::align_of::<u16>()) > 0 {
+            let slice = slice.chunks_exact(2).take(slice.len() / 2).map(|chunk| u16::from_le_bytes(chunk.try_into().unwrap())).collect::<Vec<u16>>();
+            String::from_utf16_lossy(&slice)
+        } else {
+            let slice = unsafe { std::slice::from_raw_parts(slice.as_ptr() as *const u16, slice.len() / 2) };
+            String::from_utf16_lossy(slice)
+        }
+    }
+
+    pub fn read_bool(&mut self) -> bool {
+        // A bool is specified as "a single byte with value 0 (false) or 1 (true)".
+        match self.read_u8() {
+            0 => false,
+            1 => true,
+            _ => panic!("Illegal bool value"),
+        }
+    }
+
+    pub fn read_i8(&mut self) -> i8 {
+        let value = i8::from_le_bytes(self[..1].try_into().unwrap());
+        self.offset(1);
+        value
+    }
+
+    pub fn read_u8(&mut self) -> u8 {
+        let value = u8::from_le_bytes(self[..1].try_into().unwrap());
+        self.offset(1);
+        value
+    }
+
+    pub fn read_i16(&mut self) -> i16 {
+        let value = i16::from_le_bytes(self[..2].try_into().unwrap());
+        self.offset(2);
+        value
+    }
+
+    pub fn read_u16(&mut self) -> u16 {
+        let value = u16::from_le_bytes(self[..2].try_into().unwrap());
+        self.offset(2);
+        value
+    }
+
+    pub fn read_i32(&mut self) -> i32 {
+        let value = i32::from_le_bytes(self[..4].try_into().unwrap());
+        self.offset(4);
+        value
+    }
+
+    pub fn read_u32(&mut self) -> u32 {
+        let value = u32::from_le_bytes(self[..4].try_into().unwrap());
+        self.offset(4);
+        value
+    }
+
+    pub fn read_i64(&mut self) -> i64 {
+        let value = i64::from_le_bytes(self[..8].try_into().unwrap());
+        self.offset(8);
+        value
+    }
+
+    pub fn read_u64(&mut self) -> u64 {
+        let value = u64::from_le_bytes(self[..8].try_into().unwrap());
+        self.offset(8);
+        value
+    }
+
+    pub fn read_f32(&mut self) -> f32 {
+        let value = f32::from_le_bytes(self[..4].try_into().unwrap());
+        self.offset(4);
+        value
+    }
+
+    pub fn read_f64(&mut self) -> f64 {
+        let value = f64::from_le_bytes(self[..8].try_into().unwrap());
+        self.offset(8);
+        value
+    }
+
+    pub fn read_integer(&mut self, ty: Type) -> Value {
+        match ty {
+            Type::I8 => Value::I8(self.read_i8()),
+            Type::U8 => Value::U8(self.read_u8()),
+            Type::I16 => Value::I16(self.read_i16()),
+            Type::U16 => Value::U16(self.read_u16()),
+            Type::I32 => Value::I32(self.read_i32()),
+            Type::U32 => Value::U32(self.read_u32()),
+            Type::I64 => Value::I64(self.read_i64()),
+            Type::U64 => Value::U64(self.read_u64()),
+            _ => panic!("Type is not an integer"),
+        }
+    }
+
+    fn offset(&mut self, offset: usize) {
+        self.slice = &self.slice[offset..];
+    }
+}