view dmd2/stringtable.h @ 1275:bedf0bfb8fdb

Implement first D-specific optimization pass: -simplify-drtcalls. It uses the machinery of the standard -simplify-libcalls pass, but optimizes calls to the D runtime instead of calls to C libraries. At the moment, these optimizations are implemented by this pass: - Avoid the runtime call for `arr.length = newlen` if it can determine that the new length isn't longer than the old one. - Ditto for `cast(T[]) arr` if it will clearly always succeed. (e.g. if the length of the original array is zero, or if the old element size is a multiple of the new element size)
author Frits van Bommel <fvbommel wxs.nl>
date Tue, 28 Apr 2009 21:58:06 +0200
parents f04dde6e882c
children
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// Copyright (c) 1999-2008 by Digital Mars
// All Rights Reserved
// written by Walter Bright
// http://www.digitalmars.com
// License for redistribution is by either the Artistic License
// in artistic.txt, or the GNU General Public License in gnu.txt.
// See the included readme.txt for details.


#ifndef STRINGTABLE_H
#define STRINGTABLE_H

#if __SC__
#pragma once
#endif

#include "root.h"
#include "dchar.h"
#include "lstring.h"

struct StringValue
{
    union
    {	int intvalue;
	void *ptrvalue;
	dchar *string;
    };
    Lstring lstring;
};

struct StringTable : Object
{
    void **table;
    unsigned count;
    unsigned tabledim;

    StringTable(unsigned size = 37);
    ~StringTable();

    StringValue *lookup(const dchar *s, unsigned len);
    StringValue *insert(const dchar *s, unsigned len);
    StringValue *update(const dchar *s, unsigned len);

private:
    void **search(const dchar *s, unsigned len);
};

#endif