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/*
* tardy - a tar post-processor
* Copyright (C) 1991-1995, 1998, 1999, 2002, 2004 Peter Miller;
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: interface definition for common/str.cc
*/
#ifndef COMMON_RCSTRING_H
#define COMMON_RCSTRING_H
#include <ac/stddef.h>
#include <ac/stdarg.h>
#include <main.h>
typedef unsigned long str_hash_ty;
typedef struct string_ty string_ty;
struct string_ty
{
str_hash_ty str_hash;
string_ty *str_next;
long str_references;
size_t str_length;
char str_text[1];
};
void str_initialize(void);
string_ty *str_from_c(const char *);
string_ty *str_n_from_c(const char *, size_t);
string_ty *str_copy(string_ty *);
void str_free(string_ty *);
string_ty *str_catenate(string_ty *, string_ty *);
string_ty *str_cat_three(string_ty *, string_ty *, string_ty *);
int str_bool(string_ty *);
string_ty *str_upcase(string_ty *);
string_ty *str_downcase(string_ty *);
void str_dump(void);
string_ty *str_field(string_ty *str, int sep, int fldnum);
void slow_to_fast(char **, string_ty **, size_t);
string_ty *str_format(char *, ...) ATTR_PRINTF(1, 2);
string_ty *str_vformat(char *, va_list);
inline bool
str_equal(string_ty *s1, string_ty *s2)
{
return (s1 == s2);
}
/**
* The rcstring class is used to represent a reference counted string
* class. It has optinal string equality time charactgerstics.
*/
class rcstring
{
public:
~rcstring() { if (p) str_free(p); }
rcstring() { p = 0; }
rcstring(const rcstring &arg) : p(str_copy(arg.p)) {}
rcstring(const char *arg) : p(str_from_c(arg)) {}
rcstring(const char *arg, size_t len) : p(str_n_from_c(arg, len)) {}
rcstring &operator = (const rcstring &arg) { if (p) str_free(p);
arg.bind(); p = str_copy(arg.p); return *this; }
const char *to_c_string() const { bind(); return p->str_text; }
operator const char * () const { return to_c_string(); }
size_t length() const { bind(); return p->str_length; }
str_hash_ty hash() const { bind(); return p->str_hash; }
int operator[] (int n) const { if (n < 0) return 0; bind();
if (n >= (int)p->str_length) return 0;
return (unsigned char)p->str_text[n]; }
rcstring &operator += (const rcstring &arg) { bind(); arg.bind();
string_ty *tmp = str_catenate(p, arg.p); str_free(p);
p = tmp; return *this; }
friend bool operator == (const rcstring &, const rcstring &);
friend bool operator != (const rcstring &, const rcstring &);
friend bool operator < (const rcstring &, const rcstring &);
friend bool operator <= (const rcstring &, const rcstring &);
friend bool operator > (const rcstring &, const rcstring &);
friend bool operator >= (const rcstring &, const rcstring &);
friend rcstring operator + (const rcstring &, const rcstring &);
private:
mutable string_ty *p;
void bind() const { if (!p) p = str_from_c(""); }
};
inline bool
operator == (const rcstring &lhs, const rcstring &rhs)
{
lhs.bind();
rhs.bind();
return str_equal(lhs.p, rhs.p);
}
inline bool
operator == (const rcstring &lhs, const char *rhs)
{
return (lhs == rcstring(rhs));
}
inline bool
operator == (const char *lhs, const rcstring &rhs)
{
return (rcstring(lhs) == rhs);
}
inline bool
operator != (const rcstring &lhs, const rcstring &rhs)
{
lhs.bind();
rhs.bind();
return !str_equal(lhs.p, rhs.p);
}
inline bool
operator != (const rcstring &lhs, const char *rhs)
{
return (lhs != rcstring(rhs));
}
inline bool
operator != (const char *lhs, const rcstring &rhs)
{
return (rcstring(lhs) != rhs);
}
bool operator < (const rcstring &, const rcstring &);
bool operator <= (const rcstring &, const rcstring &);
bool operator > (const rcstring &, const rcstring &);
bool operator >= (const rcstring &, const rcstring &);
inline rcstring
operator + (const rcstring &lhs, const rcstring &rhs)
{
lhs.bind();
rhs.bind();
rcstring result;
result.p = str_catenate(lhs.p, rhs.p);
return result;
}
#endif /* COMMON_RCSTRING_H */
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