run rustfmt on libpanic_unwind folder

Author: srinivasreddy

src/libpanic_unwind/dwarf/eh.rs

@@ -24,36 +24,35 @@
 use dwarf::DwarfReader;
 use core::mem;
 
-pub const DW_EH_PE_omit     : u8 = 0xFF;
-pub const DW_EH_PE_absptr   : u8 = 0x00;
-
-pub const DW_EH_PE_uleb128  : u8 = 0x01;
-pub const DW_EH_PE_udata2   : u8 = 0x02;
-pub const DW_EH_PE_udata4   : u8 = 0x03;
-pub const DW_EH_PE_udata8   : u8 = 0x04;
-pub const DW_EH_PE_sleb128  : u8 = 0x09;
-pub const DW_EH_PE_sdata2   : u8 = 0x0A;
-pub const DW_EH_PE_sdata4   : u8 = 0x0B;
-pub const DW_EH_PE_sdata8   : u8 = 0x0C;
-
-pub const DW_EH_PE_pcrel    : u8 = 0x10;
-pub const DW_EH_PE_textrel  : u8 = 0x20;
-pub const DW_EH_PE_datarel  : u8 = 0x30;
-pub const DW_EH_PE_funcrel  : u8 = 0x40;
-pub const DW_EH_PE_aligned  : u8 = 0x50;
-
-pub const DW_EH_PE_indirect : u8 = 0x80;
+pub const DW_EH_PE_omit: u8 = 0xFF;
+pub const DW_EH_PE_absptr: u8 = 0x00;
+
+pub const DW_EH_PE_uleb128: u8 = 0x01;
+pub const DW_EH_PE_udata2: u8 = 0x02;
+pub const DW_EH_PE_udata4: u8 = 0x03;
+pub const DW_EH_PE_udata8: u8 = 0x04;
+pub const DW_EH_PE_sleb128: u8 = 0x09;
+pub const DW_EH_PE_sdata2: u8 = 0x0A;
+pub const DW_EH_PE_sdata4: u8 = 0x0B;
+pub const DW_EH_PE_sdata8: u8 = 0x0C;
+
+pub const DW_EH_PE_pcrel: u8 = 0x10;
+pub const DW_EH_PE_textrel: u8 = 0x20;
+pub const DW_EH_PE_datarel: u8 = 0x30;
+pub const DW_EH_PE_funcrel: u8 = 0x40;
+pub const DW_EH_PE_aligned: u8 = 0x50;
+
+pub const DW_EH_PE_indirect: u8 = 0x80;
 
 #[derive(Copy, Clone)]
 pub struct EHContext {
-    pub ip: usize,         // Current instruction pointer
+    pub ip: usize, // Current instruction pointer
     pub func_start: usize, // Address of the current function
     pub text_start: usize, // Address of the code section
     pub data_start: usize, // Address of the data section
 }
 
-pub unsafe fn find_landing_pad(lsda: *const u8, context: &EHContext)
-                               -> Option<usize> {
+pub unsafe fn find_landing_pad(lsda: *const u8, context: &EHContext) -> Option<usize> {
     if lsda.is_null() {
         return None;
     }
@@ -80,7 +79,7 @@ pub unsafe fn find_landing_pad(lsda: *const u8, context: &EHContext)
     let action_table = reader.ptr.offset(call_site_table_length as isize);
     // Return addresses point 1 byte past the call instruction, which could
     // be in the next IP range.
-    let ip = context.ip-1;
+    let ip = context.ip - 1;
 
     while reader.ptr < action_table {
         let cs_start = read_encoded_pointer(&mut reader, context, call_site_encoding);
@@ -90,7 +89,7 @@ pub unsafe fn find_landing_pad(lsda: *const u8, context: &EHContext)
         // Callsite table is sorted by cs_start, so if we've passed the ip, we
         // may stop searching.
         if ip < func_start + cs_start {
-            break
+            break;
         }
         if ip < func_start + cs_start + cs_len {
             if cs_lpad != 0 {
@@ -114,13 +113,13 @@ fn round_up(unrounded: usize, align: usize) -> usize {
 
 unsafe fn read_encoded_pointer(reader: &mut DwarfReader,
                                context: &EHContext,
-                               encoding: u8) -> usize {
+                               encoding: u8)
+                               -> usize {
     assert!(encoding != DW_EH_PE_omit);
 
     // DW_EH_PE_aligned implies it's an absolute pointer value
     if encoding == DW_EH_PE_aligned {
-        reader.ptr = round_up(reader.ptr as usize,
-                              mem::size_of::<usize>()) as *const u8;
+        reader.ptr = round_up(reader.ptr as usize, mem::size_of::<usize>()) as *const u8;
         return reader.read::<usize>();
     }
 
@@ -134,20 +133,26 @@ unsafe fn read_encoded_pointer(reader: &mut DwarfReader,
         DW_EH_PE_sdata2 => reader.read::<i16>() as usize,
         DW_EH_PE_sdata4 => reader.read::<i32>() as usize,
         DW_EH_PE_sdata8 => reader.read::<i64>() as usize,
-        _ => panic!()
+        _ => panic!(),
     };
 
     result += match encoding & 0x70 {
         DW_EH_PE_absptr => 0,
         // relative to address of the encoded value, despite the name
         DW_EH_PE_pcrel => reader.ptr as usize,
-        DW_EH_PE_textrel => { assert!(context.text_start != 0);
-                              context.text_start },
-        DW_EH_PE_datarel => { assert!(context.data_start != 0);
-                              context.data_start },
-        DW_EH_PE_funcrel => { assert!(context.func_start != 0);
-                              context.func_start },
-        _ => panic!()
+        DW_EH_PE_textrel => {
+            assert!(context.text_start != 0);
+            context.text_start
+        }
+        DW_EH_PE_datarel => {
+            assert!(context.data_start != 0);
+            context.data_start
+        }
+        DW_EH_PE_funcrel => {
+            assert!(context.func_start != 0);
+            context.func_start
+        }
+        _ => panic!(),
     };
 
     if encoding & DW_EH_PE_indirect != 0 {

src/libpanic_unwind/dwarf/mod.rs

@@ -21,25 +21,22 @@ pub mod eh;
 use core::mem;
 
 pub struct DwarfReader {
-    pub ptr : *const u8
+    pub ptr: *const u8,
 }
 
 #[repr(C,packed)]
 struct Unaligned<T>(T);
 
 impl DwarfReader {
-
-    pub fn new(ptr : *const u8) -> DwarfReader {
-        DwarfReader {
-            ptr : ptr
-        }
+    pub fn new(ptr: *const u8) -> DwarfReader {
+        DwarfReader { ptr: ptr }
     }
 
     // DWARF streams are packed, so e.g. a u32 would not necessarily be aligned
     // on a 4-byte boundary. This may cause problems on platforms with strict
     // alignment requirements. By wrapping data in a "packed" struct, we are
     // telling the backend to generate "misalignment-safe" code.
-    pub unsafe fn read<T:Copy>(&mut self) -> T {
+    pub unsafe fn read<T: Copy>(&mut self) -> T {
         let Unaligned(result) = *(self.ptr as *const Unaligned<T>);
         self.ptr = self.ptr.offset(mem::size_of::<T>() as isize);
         result
@@ -48,9 +45,9 @@ impl DwarfReader {
     // ULEB128 and SLEB128 encodings are defined in Section 7.6 - "Variable
     // Length Data".
     pub unsafe fn read_uleb128(&mut self) -> u64 {
-        let mut shift : usize = 0;
-        let mut result : u64 = 0;
-        let mut byte : u8;
+        let mut shift: usize = 0;
+        let mut result: u64 = 0;
+        let mut byte: u8;
         loop {
             byte = self.read::<u8>();
             result |= ((byte & 0x7F) as u64) << shift;
@@ -63,9 +60,9 @@ impl DwarfReader {
     }
 
     pub unsafe fn read_sleb128(&mut self) -> i64 {
-        let mut shift : usize = 0;
-        let mut result : u64 = 0;
-        let mut byte : u8;
+        let mut shift: usize = 0;
+        let mut result: u64 = 0;
+        let mut byte: u8;
         loop {
             byte = self.read::<u8>();
             result |= ((byte & 0x7F) as u64) << shift;
@@ -84,12 +81,7 @@ impl DwarfReader {
 
 #[test]
 fn dwarf_reader() {
-    let encoded: &[u8] = &[1,
-                           2, 3,
-                           4, 5, 6, 7,
-                           0xE5, 0x8E, 0x26,
-                           0x9B, 0xF1, 0x59,
-                           0xFF, 0xFF];
+    let encoded: &[u8] = &[1, 2, 3, 4, 5, 6, 7, 0xE5, 0x8E, 0x26, 0x9B, 0xF1, 0x59, 0xFF, 0xFF];
 
     let mut reader = DwarfReader::new(encoded.as_ptr());