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// -*- C++ -*-
// Declarations etc. related to the string class, defined in libgroff/string.cc
#include <string.h>
#include <stdio.h>
#include <assert.h>
// Ensure that the first declaration of functions that are later
// declared as inline declares them as inline.
class string;
inline string operator+(const string &, const string &);
inline string operator+(const string &, const char *);
inline string operator+(const char *, const string &);
inline string operator+(const string &, char);
inline string operator+(char, const string &);
inline int operator==(const string &, const string &);
inline int operator!=(const string &, const string &);
class string
{
public:
// ctors, dtor
string();
string(const string &);
string(const char *);
string(const char *, int);
string(char);
~string();
string &operator=(const string &);
string &operator=(const char *);
string &operator=(char);
string &operator+=(const string &);
string &operator+=(const char *);
string &operator+=(char);
void append(const char *, int);
int length() const;
int empty() const;
int operator*() const;
string substring(int i, int n) const;
char &operator[](int);
char operator[](int) const;
void set_length(int i);
const char *contents() const;
int search(char) const;
char *extract() const;
void clear();
void move(string &);
friend string operator+(const string &, const string &);
friend string operator+(const string &, const char *);
friend string operator+(const char *, const string &);
friend string operator+(const string &, char);
friend string operator+(char, const string &);
friend int operator==(const string &, const string &);
friend int operator!=(const string &, const string &);
friend int operator<=(const string &, const string &);
friend int operator<(const string &, const string &);
friend int operator>=(const string &, const string &);
friend int operator>(const string &, const string &);
private:
char *ptr;
int len;
int sz;
string(const char *, int, const char *, int); // for use by operator+
void grow1();
};
inline char &
string::operator[](int i)
{
assert(i >= 0 && i < len);
return ptr[i];
}
inline char
string::operator[](int i) const
{
assert(i >= 0 && i < len);
return ptr[i];
}
inline int
string::length() const
{
return len;
}
inline int
string::empty() const
{
return len == 0;
}
inline int
string::operator*() const
{
return len;
}
inline const char *
string::contents() const
{
return ptr;
}
inline string
operator+(const string &s1, const string &s2)
{
return string(s1.ptr, s1.len, s2.ptr, s2.len);
}
inline string
operator+(const string &s1, const char *s2)
{
#ifdef __GNUG__
if (s2 == 0)
return s1;
else
return string(s1.ptr, s1.len, s2, strlen(s2));
#else
return s2 == 0 ? s1 : string(s1.ptr, s1.len, s2, strlen(s2));
#endif
}
inline string
operator+(const char *s1, const string &s2)
{
#ifdef __GNUG__
if (s1 == 0)
return s2;
else
return string(s1, strlen(s1), s2.ptr, s2.len);
#else
return s1 == 0 ? s2 : string(s1, strlen(s1), s2.ptr, s2.len);
#endif
}
inline string
operator+(const string &s, char c)
{
return string(s.ptr, s.len, &c, 1);
}
inline string
operator+(char c, const string &s)
{
return string(&c, 1, s.ptr, s.len);
}
inline int
operator==(const string &s1, const string &s2)
{
return (s1.len == s2.len
&& (s1.len == 0 || memcmp(s1.ptr, s2.ptr, s1.len) == 0));
}
inline int
operator!=(const string &s1, const string &s2)
{
return (s1.len != s2.len
|| (s1.len != 0 && memcmp(s1.ptr, s2.ptr, s1.len) != 0));
}
inline string
string::substring(int i, int n) const
{
assert(i >= 0 && i + n <= len);
return string(ptr + i, n);
}
inline string &
string::operator+=(char c)
{
if (len >= sz)
grow1();
ptr[len++] = c;
return *this;
}
void put_string(const string &, FILE *);
string as_string(int);
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