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lstring.h
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lstring.h
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// lstring.h
// length-prefixed strings
// Copyright (c) 1999-2002 by Digital Mars
// All Rights Reserved
// written by Walter Bright
// 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 LSTRING_H
#define LSTRING_H 1
#include "dchar.h"
struct Lstring
{
unsigned length;
#ifndef IN_GCC
// Disable warning about nonstandard extension
#pragma warning (disable : 4200)
#endif
dchar string[];
static Lstring zero; // 0 length string
// No constructors because we want to be able to statically
// initialize Lstring's, and Lstrings are of variable size.
#if M_UNICODE
#define LSTRING(p,length) { length, L##p }
#else
#define LSTRING(p,length) { length, p }
#endif
#if __GNUC__
#define LSTRING_EMPTY() { 0 }
#else
#define LSTRING_EMPTY() LSTRING("", 0)
#endif
static Lstring *ctor(const dchar *p) { return ctor(p, Dchar::len(p)); }
static Lstring *ctor(const dchar *p, unsigned length);
static unsigned size(unsigned length) { return sizeof(Lstring) + (length + 1) * sizeof(dchar); }
static Lstring *alloc(unsigned length);
Lstring *clone();
unsigned len() { return length; }
dchar *toDchars() { return string; }
hash_t hash() { return Dchar::calcHash(string, length); }
hash_t ihash() { return Dchar::icalcHash(string, length); }
static int cmp(const Lstring *s1, const Lstring *s2)
{
int c = s2->length - s1->length;
return c ? c : Dchar::memcmp(s1->string, s2->string, s1->length);
}
static int icmp(const Lstring *s1, const Lstring *s2)
{
int c = s2->length - s1->length;
return c ? c : Dchar::memicmp(s1->string, s2->string, s1->length);
}
Lstring *append(const Lstring *s);
Lstring *substring(int start, int end);
};
#endif