diff options
Diffstat (limited to 'vendor/windows-metadata/src/reader/file.rs')
| -rw-r--r-- | vendor/windows-metadata/src/reader/file.rs | 537 |
1 files changed, 0 insertions, 537 deletions
diff --git a/vendor/windows-metadata/src/reader/file.rs b/vendor/windows-metadata/src/reader/file.rs deleted file mode 100644 index b00b4fc52..000000000 --- a/vendor/windows-metadata/src/reader/file.rs +++ /dev/null @@ -1,537 +0,0 @@ -use super::*; -use std::cmp::*; - -#[derive(Default)] -pub struct File { - bytes: Vec<u8>, - strings: usize, - blobs: usize, - pub(crate) tables: [Table; TABLE_LEN], -} - -#[derive(Default)] -pub struct Table { - pub offset: usize, - pub len: usize, - pub width: usize, - pub columns: [Column; 6], -} - -#[derive(Default)] -pub struct Column { - pub offset: usize, - pub width: usize, -} - -pub const TABLE_CONSTANT: usize = 0; -pub const TABLE_CUSTOMATTRIBUTE: usize = 1; -pub const TABLE_FIELD: usize = 2; -pub const TABLE_GENERICPARAM: usize = 3; -pub const TABLE_INTERFACEIMPL: usize = 4; -pub const TABLE_MEMBERREF: usize = 5; -pub const TABLE_METHODDEF: usize = 6; -pub const TABLE_PARAM: usize = 7; -pub const TABLE_TYPEDEF: usize = 8; -pub const TABLE_TYPEREF: usize = 9; -pub const TABLE_TYPESPEC: usize = 10; -pub const TABLE_IMPLMAP: usize = 11; -pub const TABLE_MODULEREF: usize = 12; -pub const TABLE_NESTEDCLASS: usize = 13; -pub const TABLE_MODULE: usize = 14; -pub const TABLE_ASSEMBLYREF: usize = 15; -pub const TABLE_CLASSLAYOUT: usize = 16; -pub const TABLE_LEN: usize = 17; - -fn error(message: &str) -> Error { - Error::new(ErrorKind::Other, message) -} - -fn error_invalid_winmd() -> Error { - error("File is not a valid `winmd` file") -} - -impl File { - pub fn with_default(paths: &[&str]) -> Result<Vec<Self>> { - let mut files = vec![Self::from_buffer(std::include_bytes!("../../default/Windows.winmd").to_vec())?, Self::from_buffer(std::include_bytes!("../../default/Windows.Wdk.winmd").to_vec())?, Self::from_buffer(std::include_bytes!("../../default/Windows.Win32.winmd").to_vec())?]; - - for path in paths { - files.push(Self::new(std::path::Path::new(path))?); - } - - Ok(files) - } - - pub fn new<P: AsRef<std::path::Path>>(path: P) -> Result<Self> { - Self::from_buffer(std::fs::read(&path)?) - } - - pub fn from_buffer(bytes: Vec<u8>) -> Result<Self> { - let mut result = File { bytes, ..Default::default() }; - - let dos = result.bytes.view_as::<IMAGE_DOS_HEADER>(0); - - if dos.e_magic != IMAGE_DOS_SIGNATURE as _ || result.bytes.copy_as::<u32>(dos.e_lfanew as _) != IMAGE_NT_SIGNATURE { - return Err(error_invalid_winmd()); - } - - let file_offset = dos.e_lfanew as usize + size_of::<u32>(); - let file = result.bytes.view_as::<IMAGE_FILE_HEADER>(file_offset); - - let optional_offset = file_offset + size_of::<IMAGE_FILE_HEADER>(); - - let (com_virtual_address, sections) = match result.bytes.copy_as::<u16>(optional_offset) { - IMAGE_NT_OPTIONAL_HDR32_MAGIC => { - let optional = result.bytes.view_as::<IMAGE_OPTIONAL_HEADER32>(optional_offset); - (optional.DataDirectory[IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR as usize].VirtualAddress, result.bytes.view_as_slice_of::<IMAGE_SECTION_HEADER>(optional_offset + size_of::<IMAGE_OPTIONAL_HEADER32>(), file.NumberOfSections as usize)) - } - IMAGE_NT_OPTIONAL_HDR64_MAGIC => { - let optional = result.bytes.view_as::<IMAGE_OPTIONAL_HEADER64>(optional_offset); - (optional.DataDirectory[IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR as usize].VirtualAddress, result.bytes.view_as_slice_of::<IMAGE_SECTION_HEADER>(optional_offset + size_of::<IMAGE_OPTIONAL_HEADER64>(), file.NumberOfSections as usize)) - } - _ => return Err(error_invalid_winmd()), - }; - - let clr = result.bytes.view_as::<IMAGE_COR20_HEADER>(offset_from_rva(section_from_rva(sections, com_virtual_address)?, com_virtual_address) as _); - - if clr.cb != size_of::<IMAGE_COR20_HEADER>() as _ { - return Err(error_invalid_winmd()); - } - - let metadata_offset = offset_from_rva(section_from_rva(sections, clr.MetaData.VirtualAddress)?, clr.MetaData.VirtualAddress); - let metadata = result.bytes.view_as::<METADATA_HEADER>(metadata_offset as _); - - if metadata.signature != METADATA_SIGNATURE { - return Err(error_invalid_winmd()); - } - - // The METADATA_HEADER struct is not a fixed size so have to offset a little more carefully. - let mut view = metadata_offset + metadata.length as usize + 20; - let mut tables_data: (usize, usize) = (0, 0); - - for _ in 0..result.bytes.copy_as::<u16>(metadata_offset + metadata.length as usize + 18) { - let stream_offset = result.bytes.copy_as::<u32>(view) as usize; - let stream_len = result.bytes.copy_as::<u32>(view + 4) as usize; - let stream_name = result.bytes.view_as_str(view + 8); - match stream_name { - b"#Strings" => result.strings = metadata_offset + stream_offset, - b"#Blob" => result.blobs = metadata_offset + stream_offset, - b"#~" => tables_data = (metadata_offset + stream_offset, stream_len), - b"#GUID" => {} - b"#US" => {} - _ => unimplemented!(), - } - let mut padding = 4 - stream_name.len() % 4; - if padding == 0 { - padding = 4; - } - view += 8 + stream_name.len() + padding; - } - - let heap_sizes = result.bytes.copy_as::<u8>(tables_data.0 + 6); - let string_index_size = if (heap_sizes & 1) == 1 { 4 } else { 2 }; - let guid_index_size = if (heap_sizes >> 1 & 1) == 1 { 4 } else { 2 }; - let blob_index_size = if (heap_sizes >> 2 & 1) == 1 { 4 } else { 2 }; - let valid_bits = result.bytes.copy_as::<u64>(tables_data.0 + 8); - view = tables_data.0 + 24; - - // These tables are unused by the reader, but needed temporarily to calculate sizes and offsets for subsequent tables. - let unused_empty = Table::default(); - let mut unused_assembly = Table::default(); - let mut unused_assembly_os = Table::default(); - let mut unused_assembly_processor = Table::default(); - let mut unused_assembly_ref_os = Table::default(); - let mut unused_assembly_ref_processor = Table::default(); - let mut unused_decl_security = Table::default(); - let mut unused_event = Table::default(); - let mut unused_event_map = Table::default(); - let mut unused_exported_type = Table::default(); - let mut unused_field_layout = Table::default(); - let mut unused_field_marshal = Table::default(); - let mut unused_field_rva = Table::default(); - let mut unused_file = Table::default(); - let mut unused_generic_param_constraint = Table::default(); - let mut unused_manifest_resource = Table::default(); - let mut unused_method_impl = Table::default(); - let mut unused_method_semantics = Table::default(); - let mut unused_method_spec = Table::default(); - let mut unused_property = Table::default(); - let mut unused_property_map = Table::default(); - let mut unused_standalone_sig = Table::default(); - - for i in 0..64 { - if (valid_bits >> i & 1) == 0 { - continue; - } - - let len = result.bytes.copy_as::<u32>(view) as _; - view += 4; - - match i { - 0x00 => result.tables[TABLE_MODULE].len = len, - 0x01 => result.tables[TABLE_TYPEREF].len = len, - 0x02 => result.tables[TABLE_TYPEDEF].len = len, - 0x04 => result.tables[TABLE_FIELD].len = len, - 0x06 => result.tables[TABLE_METHODDEF].len = len, - 0x08 => result.tables[TABLE_PARAM].len = len, - 0x09 => result.tables[TABLE_INTERFACEIMPL].len = len, - 0x0a => result.tables[TABLE_MEMBERREF].len = len, - 0x0b => result.tables[TABLE_CONSTANT].len = len, - 0x0c => result.tables[TABLE_CUSTOMATTRIBUTE].len = len, - 0x0d => unused_field_marshal.len = len, - 0x0e => unused_decl_security.len = len, - 0x0f => result.tables[TABLE_CLASSLAYOUT].len = len, - 0x10 => unused_field_layout.len = len, - 0x11 => unused_standalone_sig.len = len, - 0x12 => unused_event_map.len = len, - 0x14 => unused_event.len = len, - 0x15 => unused_property_map.len = len, - 0x17 => unused_property.len = len, - 0x18 => unused_method_semantics.len = len, - 0x19 => unused_method_impl.len = len, - 0x1a => result.tables[TABLE_MODULEREF].len = len, - 0x1b => result.tables[TABLE_TYPESPEC].len = len, - 0x1c => result.tables[TABLE_IMPLMAP].len = len, - 0x1d => unused_field_rva.len = len, - 0x20 => unused_assembly.len = len, - 0x21 => unused_assembly_processor.len = len, - 0x22 => unused_assembly_os.len = len, - 0x23 => result.tables[TABLE_ASSEMBLYREF].len = len, - 0x24 => unused_assembly_ref_processor.len = len, - 0x25 => unused_assembly_ref_os.len = len, - 0x26 => unused_file.len = len, - 0x27 => unused_exported_type.len = len, - 0x28 => unused_manifest_resource.len = len, - 0x29 => result.tables[TABLE_NESTEDCLASS].len = len, - 0x2a => result.tables[TABLE_GENERICPARAM].len = len, - 0x2b => unused_method_spec.len = len, - 0x2c => unused_generic_param_constraint.len = len, - _ => unreachable!(), - }; - } - - let tables = &result.tables; - let type_def_or_ref = coded_index_size(&[tables[TABLE_TYPEDEF].len, tables[TABLE_TYPEREF].len, tables[TABLE_TYPESPEC].len]); - let has_constant = coded_index_size(&[tables[TABLE_FIELD].len, tables[TABLE_PARAM].len, unused_property.len]); - let has_field_marshal = coded_index_size(&[tables[TABLE_FIELD].len, tables[TABLE_PARAM].len]); - let has_decl_security = coded_index_size(&[tables[TABLE_TYPEDEF].len, tables[TABLE_METHODDEF].len, unused_assembly.len]); - let member_ref_parent = coded_index_size(&[tables[TABLE_TYPEDEF].len, tables[TABLE_TYPEREF].len, tables[TABLE_MODULEREF].len, tables[TABLE_METHODDEF].len, tables[TABLE_TYPESPEC].len]); - let has_semantics = coded_index_size(&[unused_event.len, unused_property.len]); - let method_def_or_ref = coded_index_size(&[tables[TABLE_METHODDEF].len, tables[TABLE_MEMBERREF].len]); - let member_forwarded = coded_index_size(&[tables[TABLE_FIELD].len, tables[TABLE_METHODDEF].len]); - let implementation = coded_index_size(&[unused_file.len, tables[TABLE_ASSEMBLYREF].len, unused_exported_type.len]); - let custom_attribute_type = coded_index_size(&[tables[TABLE_METHODDEF].len, tables[TABLE_MEMBERREF].len, unused_empty.len, unused_empty.len, unused_empty.len]); - let resolution_scope = coded_index_size(&[tables[TABLE_MODULE].len, tables[TABLE_MODULEREF].len, tables[TABLE_ASSEMBLYREF].len, tables[TABLE_TYPEREF].len]); - let type_or_method_def = coded_index_size(&[tables[TABLE_TYPEDEF].len, tables[TABLE_METHODDEF].len]); - - let has_custom_attribute = coded_index_size(&[ - tables[TABLE_METHODDEF].len, - tables[TABLE_FIELD].len, - tables[TABLE_TYPEREF].len, - tables[TABLE_TYPEDEF].len, - tables[TABLE_PARAM].len, - tables[TABLE_INTERFACEIMPL].len, - tables[TABLE_MEMBERREF].len, - tables[TABLE_MODULE].len, - unused_property.len, - unused_event.len, - unused_standalone_sig.len, - tables[TABLE_MODULEREF].len, - tables[TABLE_TYPESPEC].len, - unused_assembly.len, - tables[TABLE_ASSEMBLYREF].len, - unused_file.len, - unused_exported_type.len, - unused_manifest_resource.len, - tables[TABLE_GENERICPARAM].len, - unused_generic_param_constraint.len, - unused_method_spec.len, - ]); - - unused_assembly.set_columns(4, 8, 4, blob_index_size, string_index_size, string_index_size); - unused_assembly_os.set_columns(4, 4, 4, 0, 0, 0); - unused_assembly_processor.set_columns(4, 0, 0, 0, 0, 0); - result.tables[TABLE_ASSEMBLYREF].set_columns(8, 4, blob_index_size, string_index_size, string_index_size, blob_index_size); - unused_assembly_ref_os.set_columns(4, 4, 4, result.tables[TABLE_ASSEMBLYREF].index_width(), 0, 0); - unused_assembly_ref_processor.set_columns(4, result.tables[TABLE_ASSEMBLYREF].index_width(), 0, 0, 0, 0); - result.tables[TABLE_CLASSLAYOUT].set_columns(2, 4, result.tables[TABLE_TYPEDEF].index_width(), 0, 0, 0); - result.tables[TABLE_CONSTANT].set_columns(2, has_constant, blob_index_size, 0, 0, 0); - result.tables[TABLE_CUSTOMATTRIBUTE].set_columns(has_custom_attribute, custom_attribute_type, blob_index_size, 0, 0, 0); - unused_decl_security.set_columns(2, has_decl_security, blob_index_size, 0, 0, 0); - unused_event_map.set_columns(result.tables[TABLE_TYPEDEF].index_width(), unused_event.index_width(), 0, 0, 0, 0); - unused_event.set_columns(2, string_index_size, type_def_or_ref, 0, 0, 0); - unused_exported_type.set_columns(4, 4, string_index_size, string_index_size, implementation, 0); - result.tables[TABLE_FIELD].set_columns(2, string_index_size, blob_index_size, 0, 0, 0); - unused_field_layout.set_columns(4, result.tables[TABLE_FIELD].index_width(), 0, 0, 0, 0); - unused_field_marshal.set_columns(has_field_marshal, blob_index_size, 0, 0, 0, 0); - unused_field_rva.set_columns(4, result.tables[TABLE_FIELD].index_width(), 0, 0, 0, 0); - unused_file.set_columns(4, string_index_size, blob_index_size, 0, 0, 0); - result.tables[TABLE_GENERICPARAM].set_columns(2, 2, type_or_method_def, string_index_size, 0, 0); - unused_generic_param_constraint.set_columns(result.tables[TABLE_GENERICPARAM].index_width(), type_def_or_ref, 0, 0, 0, 0); - result.tables[TABLE_IMPLMAP].set_columns(2, member_forwarded, string_index_size, result.tables[TABLE_MODULEREF].index_width(), 0, 0); - result.tables[TABLE_INTERFACEIMPL].set_columns(result.tables[TABLE_TYPEDEF].index_width(), type_def_or_ref, 0, 0, 0, 0); - unused_manifest_resource.set_columns(4, 4, string_index_size, implementation, 0, 0); - result.tables[TABLE_MEMBERREF].set_columns(member_ref_parent, string_index_size, blob_index_size, 0, 0, 0); - result.tables[TABLE_METHODDEF].set_columns(4, 2, 2, string_index_size, blob_index_size, result.tables[TABLE_PARAM].index_width()); - unused_method_impl.set_columns(result.tables[TABLE_TYPEDEF].index_width(), method_def_or_ref, method_def_or_ref, 0, 0, 0); - unused_method_semantics.set_columns(2, result.tables[TABLE_METHODDEF].index_width(), has_semantics, 0, 0, 0); - unused_method_spec.set_columns(method_def_or_ref, blob_index_size, 0, 0, 0, 0); - result.tables[TABLE_MODULE].set_columns(2, string_index_size, guid_index_size, guid_index_size, guid_index_size, 0); - result.tables[TABLE_MODULEREF].set_columns(string_index_size, 0, 0, 0, 0, 0); - result.tables[TABLE_NESTEDCLASS].set_columns(result.tables[TABLE_TYPEDEF].index_width(), result.tables[TABLE_TYPEDEF].index_width(), 0, 0, 0, 0); - result.tables[TABLE_PARAM].set_columns(2, 2, string_index_size, 0, 0, 0); - unused_property.set_columns(2, string_index_size, blob_index_size, 0, 0, 0); - unused_property_map.set_columns(result.tables[TABLE_TYPEDEF].index_width(), unused_property.index_width(), 0, 0, 0, 0); - unused_standalone_sig.set_columns(blob_index_size, 0, 0, 0, 0, 0); - result.tables[TABLE_TYPEDEF].set_columns(4, string_index_size, string_index_size, type_def_or_ref, result.tables[TABLE_FIELD].index_width(), result.tables[TABLE_METHODDEF].index_width()); - result.tables[TABLE_TYPEREF].set_columns(resolution_scope, string_index_size, string_index_size, 0, 0, 0); - result.tables[TABLE_TYPESPEC].set_columns(blob_index_size, 0, 0, 0, 0, 0); - - result.tables[TABLE_MODULE].set_data(&mut view); - result.tables[TABLE_TYPEREF].set_data(&mut view); - result.tables[TABLE_TYPEDEF].set_data(&mut view); - result.tables[TABLE_FIELD].set_data(&mut view); - result.tables[TABLE_METHODDEF].set_data(&mut view); - result.tables[TABLE_PARAM].set_data(&mut view); - result.tables[TABLE_INTERFACEIMPL].set_data(&mut view); - result.tables[TABLE_MEMBERREF].set_data(&mut view); - result.tables[TABLE_CONSTANT].set_data(&mut view); - result.tables[TABLE_CUSTOMATTRIBUTE].set_data(&mut view); - unused_field_marshal.set_data(&mut view); - unused_decl_security.set_data(&mut view); - result.tables[TABLE_CLASSLAYOUT].set_data(&mut view); - unused_field_layout.set_data(&mut view); - unused_standalone_sig.set_data(&mut view); - unused_event_map.set_data(&mut view); - unused_event.set_data(&mut view); - unused_property_map.set_data(&mut view); - unused_property.set_data(&mut view); - unused_method_semantics.set_data(&mut view); - unused_method_impl.set_data(&mut view); - result.tables[TABLE_MODULEREF].set_data(&mut view); - result.tables[TABLE_TYPESPEC].set_data(&mut view); - result.tables[TABLE_IMPLMAP].set_data(&mut view); - unused_field_rva.set_data(&mut view); - unused_assembly.set_data(&mut view); - unused_assembly_processor.set_data(&mut view); - unused_assembly_os.set_data(&mut view); - result.tables[TABLE_ASSEMBLYREF].set_data(&mut view); - unused_assembly_ref_processor.set_data(&mut view); - unused_assembly_ref_os.set_data(&mut view); - unused_file.set_data(&mut view); - unused_exported_type.set_data(&mut view); - unused_manifest_resource.set_data(&mut view); - result.tables[TABLE_NESTEDCLASS].set_data(&mut view); - result.tables[TABLE_GENERICPARAM].set_data(&mut view); - - Ok(result) - } - - pub fn usize(&self, row: usize, table: usize, column: usize) -> usize { - let table = &self.tables[table]; - let column = &table.columns[column]; - let offset = table.offset + row * table.width + column.offset; - match column.width { - 1 => self.bytes.copy_as::<u8>(offset) as _, - 2 => self.bytes.copy_as::<u16>(offset) as _, - 4 => self.bytes.copy_as::<u32>(offset) as _, - _ => self.bytes.copy_as::<u64>(offset) as _, - } - } - - /// Returns the string from the `#Strings` stream as referenced by - /// the (table, row, column) triple. - /// - /// # Panics - /// - /// * When any element of the (table, row, column) triple is invalid. - /// * When the offset in the string table is out of bounds. - /// * When no null terminator can be found in the string table. - /// * When the null-terminated string is not valid utf-8. - pub fn str(&self, row: usize, table: usize, column: usize) -> &str { - let offset = self.strings + self.usize(row, table, column); - - let bytes = &self.bytes[offset..]; - let nul_pos = bytes.iter().position(|&c| c == 0).expect("expected null-terminated C-string"); - std::str::from_utf8(&bytes[..nul_pos]).expect("expected valid utf-8 C-string") - } - - pub fn blob(&self, row: usize, table: usize, column: usize) -> &[u8] { - let offset = self.blobs + self.usize(row, table, column); - let initial_byte = self.bytes[offset]; - let (blob_size, blob_size_bytes) = match initial_byte >> 5 { - 0..=3 => (initial_byte & 0x7f, 1), - 4..=5 => (initial_byte & 0x3f, 2), - 6 => (initial_byte & 0x1f, 4), - _ => unimplemented!(), - }; - let mut blob_size = blob_size as usize; - for byte in &self.bytes[offset + 1..offset + blob_size_bytes] { - blob_size = blob_size.checked_shl(8).unwrap_or(0) + (*byte as usize); - } - let offset = offset + blob_size_bytes; - &self.bytes[offset..offset + blob_size] - } - - pub fn equal_range(&self, table: usize, column: usize, value: usize) -> (usize, usize) { - let mut first = 0; - let mut last = self.tables[table].len; - let mut count = last; - loop { - if count == 0 { - last = first; - break; - } - let count2 = count / 2; - let middle = first + count2; - let middle_value = self.usize(middle, table, column); - match middle_value.cmp(&value) { - Ordering::Less => { - first = middle + 1; - count -= count2 + 1; - } - Ordering::Greater => count = count2, - Ordering::Equal => { - let first2 = self.lower_bound_of(table, first, middle, column, value); - first += count; - last = self.upper_bound_of(table, middle + 1, first, column, value); - first = first2; - break; - } - } - } - (first, last) - } - - fn lower_bound_of(&self, table: usize, mut first: usize, last: usize, column: usize, value: usize) -> usize { - let mut count = last - first; - while count > 0 { - let count2 = count / 2; - let middle = first + count2; - if self.usize(middle, table, column) < value { - first = middle + 1; - count -= count2 + 1; - } else { - count = count2; - } - } - first - } - - pub fn upper_bound_of(&self, table: usize, mut first: usize, last: usize, column: usize, value: usize) -> usize { - let mut count = last - first; - while count > 0 { - let count2 = count / 2; - let middle = first + count2; - if value < self.usize(middle, table, column) { - count = count2 - } else { - first = middle + 1; - count -= count2 + 1; - } - } - first - } -} - -impl Table { - fn index_width(&self) -> usize { - if self.len < (1 << 16) { - 2 - } else { - 4 - } - } - - fn set_columns(&mut self, a: usize, b: usize, c: usize, d: usize, e: usize, f: usize) { - self.width = a + b + c + d + e + f; - self.columns[0] = Column::new(0, a); - if b != 0 { - self.columns[1] = Column::new(a, b); - } - if c != 0 { - self.columns[2] = Column::new(a + b, c); - } - if d != 0 { - self.columns[3] = Column::new(a + b + c, d); - } - if e != 0 { - self.columns[4] = Column::new(a + b + c + d, e); - } - if f != 0 { - self.columns[5] = Column::new(a + b + c + d + e, f); - } - } - - fn set_data(&mut self, offset: &mut usize) { - if self.len != 0 { - let next = *offset + self.len * self.width; - self.offset = *offset; - *offset = next; - } - } -} - -impl Column { - fn new(offset: usize, width: usize) -> Self { - Self { offset, width } - } -} - -macro_rules! assert_proper_length { - ($self:expr, $t:ty, $offset:expr, $size:expr) => { - let enough_room = $offset + $size <= $self.len(); - assert!(enough_room, "Invalid file: not enough bytes at offset {} to represent T", $offset); - }; -} - -macro_rules! assert_proper_length_and_alignment { - ($self:expr, $t:ty, $offset:expr, $size:expr) => {{ - assert_proper_length!($self, $t, $offset, $size); - let ptr = &$self[$offset] as *const u8 as *const $t; - let properly_aligned = ptr.align_offset(align_of::<$t>()) == 0; - assert!(properly_aligned, "Invalid file: offset {} is not properly aligned to T", $offset); - ptr - }}; -} - -trait View { - fn view_as<T>(&self, offset: usize) -> &T; - fn view_as_slice_of<T>(&self, offset: usize, len: usize) -> &[T]; - fn copy_as<T: Copy>(&self, offset: usize) -> T; - fn view_as_str(&self, offset: usize) -> &[u8]; -} - -impl View for [u8] { - fn view_as<T>(&self, offset: usize) -> &T { - let ptr = assert_proper_length_and_alignment!(self, T, offset, size_of::<T>()); - unsafe { &*ptr } - } - - fn view_as_slice_of<T>(&self, offset: usize, len: usize) -> &[T] { - let ptr = assert_proper_length_and_alignment!(self, T, offset, size_of::<T>() * len); - unsafe { std::slice::from_raw_parts(ptr, len) } - } - - fn copy_as<T>(&self, offset: usize) -> T { - assert_proper_length!(self, T, offset, size_of::<T>()); - unsafe { - let mut data = MaybeUninit::zeroed().assume_init(); - copy_nonoverlapping(self[offset..].as_ptr(), &mut data as *mut T as *mut u8, size_of::<T>()); - data - } - } - - fn view_as_str(&self, offset: usize) -> &[u8] { - let buffer = &self[offset..]; - let index = buffer.iter().position(|c| *c == b'\0').expect("Invalid file"); - &self[offset..offset + index] - } -} - -fn section_from_rva(sections: &[IMAGE_SECTION_HEADER], rva: u32) -> Result<&IMAGE_SECTION_HEADER> { - sections.iter().find(|&s| rva >= s.VirtualAddress && rva < s.VirtualAddress + unsafe { s.Misc.VirtualSize }).ok_or_else(error_invalid_winmd) -} - -fn offset_from_rva(section: &IMAGE_SECTION_HEADER, rva: u32) -> usize { - (rva - section.VirtualAddress + section.PointerToRawData) as usize -} |