//
// Author:
// Miguel de Icaza
+// Atsushi Enomoto <atsushi@ximian.com>
//
// (C) 2001 Ximian, Inc.
+// (C) 2005 Novell, Inc.
//
using System;
using System.IO;
using System.Collections;
-using System.Diagnostics.SymbolStore;
+using Mono.CompilerServices.SymbolWriter;
namespace Mono.CSharp {
/// <summary>
/// This is intentionally a class and not a struct since we need
/// to pass this by reference.
/// </remarks>
- public sealed class SourceFile {
+ public sealed class SourceFile : ISourceFile {
public readonly string Name;
public readonly string Path;
public readonly int Index;
- public ISymbolDocumentWriter SymbolDocument;
+ public SourceFileEntry SourceFileEntry;
public bool HasLineDirective;
public SourceFile (string name, string path, int index)
this.Name = name;
this.Path = path;
}
+
+ SourceFileEntry ISourceFile.Entry {
+ get { return SourceFileEntry; }
+ }
+
+ public override string ToString ()
+ {
+ return String.Format ("SourceFile ({0}:{1}:{2}:{3})",
+ Name, Path, Index, SourceFileEntry);
+ }
}
/// <summary>
///
/// <remarks>
/// This uses a compact representation and a couple of auxiliary
- /// structures to keep track of tokens to (file,line) mappings.
+ /// structures to keep track of tokens to (file,line and column)
+ /// mappings. The usage of the bits is:
+ ///
+ /// - 16 bits for "checkpoint" which is a mixed concept of
+ /// file and "line segment"
+ /// - 8 bits for line delta (offset) from the line segment
+ /// - 8 bits for column number.
///
- /// We could probably also keep track of columns by storing those
- /// in 8 bits (and say, map anything after char 255 to be `255+').
+ /// http://lists.ximian.com/pipermail/mono-devel-list/2004-December/009508.html
/// </remarks>
public struct Location {
- public int token;
+ int token;
+
+ struct Checkpoint {
+ public readonly int LineOffset;
+ public readonly int File;
+
+ public Checkpoint (int file, int line)
+ {
+ File = file;
+ LineOffset = line - (int) (line % (1 << line_delta_bits));
+ }
+ }
static ArrayList source_list;
static Hashtable source_files;
- static int source_bits;
- static int source_mask;
+ static int checkpoint_bits;
static int source_count;
static int current_source;
-
- public readonly static Location Null;
+ static int line_delta_bits;
+ static int line_delta_mask;
+ static int column_bits;
+ static int column_mask;
+ static Checkpoint [] checkpoints;
+ static int checkpoint_index;
+
+ public readonly static Location Null = new Location (-1);
+ public static bool InEmacs;
static Location ()
{
source_files = new Hashtable ();
source_list = new ArrayList ();
current_source = 0;
- Null.token = 0;
+ checkpoints = new Checkpoint [10];
+ }
+
+ public static void Reset ()
+ {
+ source_files = new Hashtable ();
+ source_list = new ArrayList ();
+ current_source = 0;
+ source_count = 0;
}
// <summary>
string path = Path.GetFullPath (name);
if (source_files.Contains (path)){
- Report.Warning (
- 2002,
- "Source file `" + name + "' specified multiple times");
+ int id = (int) source_files [path];
+ string other_name = ((SourceFile) source_list [id - 1]).Name;
+ if (name.Equals (other_name))
+ Report.Warning (2002, 1, "Source file `{0}' specified multiple times", other_name);
+ else
+ Report.Warning (2002, 1, "Source filenames `{0}' and `{1}' both refer to the same file: {2}", name, other_name, path);
return;
}
}
}
- static int log2 (int number)
- {
- int bits = 0;
- while (number > 0) {
- bits++;
- number /= 2;
- }
-
- return bits;
- }
-
// <summary>
// After adding all source files we want to compile with AddFile(), this method
// must be called to `reserve' an appropriate number of bits in the token for the
// </summary>
static public void Initialize ()
{
- source_bits = log2 (source_list.Count) + 2;
- source_mask = (1 << source_bits) - 1;
+ checkpoints = new Checkpoint [source_list.Count * 2];
+ if (checkpoints.Length > 0)
+ checkpoints [0] = new Checkpoint (0, 0);
+
+ column_bits = 8;
+ column_mask = 0xFF;
+ line_delta_bits = 8;
+ line_delta_mask = 0xFF00;
+ checkpoint_index = 0;
+ checkpoint_bits = 16;
}
// <remarks>
// </remarks>
static public SourceFile LookupFile (string name)
{
- string path = name == "" ? "" : Path.GetFullPath (name);
+ string path = name.Length == 0 ? "" : Path.GetFullPath (name);
if (!source_files.Contains (path)) {
- if (source_count >= (1 << source_bits))
+ if (source_count >= (1 << checkpoint_bits))
return new SourceFile (name, path, 0);
source_files.Add (path, ++source_count);
static public void Push (SourceFile file)
{
current_source = file.Index;
+ // File is always pushed before being changed.
}
// <remarks>
- // If we're compiling with debugging support, this is called between parsing and
- // code generation to register all the source files with the symbol writer. //
+ // If we're compiling with debugging support, this is called between parsing
+ // and code generation to register all the source files with the
+ // symbol writer.
// </remarks>
static public void DefineSymbolDocuments (SymbolWriter symwriter)
{
foreach (SourceFile file in source_list) {
- if (file.HasLineDirective)
- continue;
- file.SymbolDocument = symwriter.DefineDocument (file.Path);
+ file.SourceFileEntry = symwriter.DefineDocument (file.Path);
}
}
public Location (int row)
+ : this (row, 0)
+ {
+ }
+
+ public Location (int row, int column)
{
- if (row < 0)
+ if (row <= 0)
token = 0;
- else
- token = current_source + (row << source_bits);
+ else {
+ if (column > 255)
+ column = 255;
+ int target = -1;
+ int delta = 0;
+ int max = checkpoint_index < 10 ?
+ checkpoint_index : 10;
+ for (int i = 0; i < max; i++) {
+ int offset = checkpoints [checkpoint_index - i].LineOffset;
+ delta = row - offset;
+ if (delta >= 0 &&
+ delta < (1 << line_delta_bits) &&
+ checkpoints [checkpoint_index - i].File == current_source) {
+ target = checkpoint_index - i;
+ break;
+ }
+ }
+ if (target == -1) {
+ AddCheckpoint (current_source, row);
+ target = checkpoint_index;
+ delta = row % (1 << line_delta_bits);
+ }
+ long l = column +
+ (long) (delta << column_bits) +
+ (long) (target << (line_delta_bits + column_bits));
+ token = l > 0xFFFFFFFF ? 0 : (int) l;
+ }
+ }
+
+ static void AddCheckpoint (int file, int row)
+ {
+ if (checkpoints.Length == ++checkpoint_index) {
+ Checkpoint [] tmp = new Checkpoint [checkpoint_index * 2];
+ Array.Copy (checkpoints, tmp, checkpoints.Length);
+ checkpoints = tmp;
+ }
+ checkpoints [checkpoint_index] = new Checkpoint (file, row);
}
public override string ToString ()
{
- return Name + ": (" + Row + ")";
+ if (column_bits == 0 || InEmacs)
+ return Name + "(" + Row + "):";
+ else
+ return Name + "(" + Row + "," + Column +
+ (Column == column_mask ? "+):" : "):");
}
/// <summary>
/// Whether the Location is Null
/// </summary>
- static public bool IsNull (Location l)
- {
- return l.token == 0;
+ public bool IsNull {
+ get { return token == 0; }
}
public string Name {
get {
- int index = token & source_mask;
- if ((token == 0) || (index == 0))
+ int index = File;
+ if (token == 0 || index == 0)
return "Internal";
SourceFile file = (SourceFile) source_list [index - 1];
}
}
+ int CheckpointIndex {
+ get { return (int) ((token & 0xFFFF0000) >> (line_delta_bits + column_bits)); }
+ }
+
public int Row {
get {
if (token == 0)
return 1;
+ return checkpoints [CheckpointIndex].LineOffset + ((token & line_delta_mask) >> column_bits);
+ }
+ }
- return token >> source_bits;
+ public int Column {
+ get {
+ if (token == 0)
+ return 1;
+ return (int) (token & column_mask);
}
}
public int File {
get {
- return token & source_mask;
+ if (token == 0)
+ return 0;
+if (checkpoints.Length <= CheckpointIndex) throw new Exception (String.Format ("Should not happen. Token is {0:X04}, checkpoints are {1}, index is {2}", token, checkpoints.Length, CheckpointIndex));
+ return checkpoints [CheckpointIndex].File;
}
}
// to the location's source file.
//
// If we don't have a symbol writer, this property is always null.
- public ISymbolDocumentWriter SymbolDocument {
+ public SourceFile SourceFile {
get {
- int index = token & source_mask;
+ int index = File;
if (index == 0)
return null;
- SourceFile file = (SourceFile) source_list [index - 1];
- return file.SymbolDocument;
+ return (SourceFile) source_list [index - 1];
}
}
}
+
+ public class LocatedToken
+ {
+ public readonly Location Location;
+ public readonly string Value;
+
+ public LocatedToken (Location loc, string value)
+ {
+ Location = loc;
+ Value = value;
+ }
+
+ public override string ToString ()
+ {
+ return Location.ToString () + Value;
+ }
+ }
}
projects / mono.git / blobdiff