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1.1 root 1: /* This is part of libio/iostream, providing -*- C++ -*- input/output.
2: Copyright (C) 1993 Free Software Foundation
3:
4: This file is part of the GNU IO Library. This library is free
5: software; you can redistribute it and/or modify it under the
6: terms of the GNU General Public License as published by the
7: Free Software Foundation; either version 2, or (at your option)
8: any later version.
9:
10: This library is distributed in the hope that it will be useful,
11: but WITHOUT ANY WARRANTY; without even the implied warranty of
12: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13: GNU General Public License for more details.
14:
15: You should have received a copy of the GNU General Public License
16: along with GNU CC; see the file COPYING. If not, write to
17: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
18:
19: As a special exception, if you link this library with files
20: compiled with a GNU compiler to produce an executable, this does not cause
21: the resulting executable to be covered by the GNU General Public License.
22: This exception does not however invalidate any other reasons why
23: the executable file might be covered by the GNU General Public License. */
24:
25: #ifndef _IOMANIP_H
26: //
27: // Not specifying `pragma interface' causes the compiler to emit the
28: // template definitions in the files, where they are used.
29: //
30: //#ifdef __GNUG__
31: //#pragma interface
32: //#endif
33: #pragma cplusplus
34:
35: #define _IOMANIP_H
36:
37: #include <iostream.h>
38:
39: //-----------------------------------------------------------------------------
40: // Parametrized Manipulators as specified by ANSI draft
41: //-----------------------------------------------------------------------------
42:
43: //-----------------------------------------------------------------------------
44: // Stream Manipulators
45: //-----------------------------------------------------------------------------
46: //
47: template<class TP> class smanip; // TP = Type Param
48:
49: template<class TP> class sapp {
50: ios& (*_f)(ios&, TP);
51: public:
52: sapp(ios& (*f)(ios&, TP)) : _f(f) {}
53: //
54: smanip<TP> operator()(TP a)
55: { return smanip<TP>(_f, a); }
56: };
57:
58: template <class TP> class smanip {
59: ios& (*_f)(ios&, TP);
60: TP _a;
61: public:
62: smanip(ios& (*f)(ios&, TP), TP a) : _f(f), _a(a) {}
63: //
64: friend
65: istream& operator>>(istream& i, const smanip<TP>& m);
66: friend
67: ostream& operator<<(ostream& o, const smanip<TP>& m);
68: };
69:
70: template<class TP>
71: inline istream& operator>>(istream& i, const smanip<TP>& m)
72: { (*m._f)(i, m._a); return i; }
73:
74: template<class TP>
75: inline ostream& operator<<(ostream& o, const smanip<TP>& m)
76: { (*m._f)(o, m._a); return o;}
77:
78: //-----------------------------------------------------------------------------
79: // Input-Stream Manipulators
80: //-----------------------------------------------------------------------------
81: //
82: template<class TP> class imanip;
83:
84: template<class TP> class iapp {
85: istream& (*_f)(istream&, TP);
86: public:
87: iapp(ostream& (*f)(istream&,TP)) : _f(f) {}
88: //
89: imanip<TP> operator()(TP a)
90: { return imanip<TP>(_f, a); }
91: };
92:
93: template <class TP> class imanip {
94: istream& (*_f)(istream&, TP);
95: TP _a;
96: public:
97: imanip(istream& (*f)(istream&, TP), TP a) : _f(f), _a(a) {}
98: //
99: friend
100: istream& operator>>(istream& i, const imanip<TP>& m)
101: { return (*m._f)( i, m._a); }
102: };
103:
104:
105: //-----------------------------------------------------------------------------
106: // Output-Stream Manipulators
107: //-----------------------------------------------------------------------------
108: //
109: template<class TP> class omanip;
110:
111: template<class TP> class oapp {
112: ostream& (*_f)(ostream&, TP);
113: public:
114: oapp(ostream& (*f)(ostream&,TP)) : _f(f) {}
115: //
116: omanip<TP> operator()(TP a)
117: { return omanip<TP>(_f, a); }
118: };
119:
120: template <class TP> class omanip {
121: ostream& (*_f)(ostream&, TP);
122: TP _a;
123: public:
124: omanip(ostream& (*f)(ostream&, TP), TP a) : _f(f), _a(a) {}
125: //
126: friend
127: ostream& operator<<(ostream& o, omanip<TP>& m)
128: { return (*m._f)(o, m._a); }
129: };
130:
131:
132: //-----------------------------------------------------------------------------
133: // Available Manipulators
134: //-----------------------------------------------------------------------------
135:
136: //
137: // Macro to define an iomanip function, with one argument
138: // The underlying function is `__iomanip_<name>'
139: //
140: #define __DEFINE_IOMANIP_FN1(type,param,function) \
141: extern ios& __iomanip_##function (ios&, param); \
142: inline type<param> function (param n) \
143: { return type<param> (__iomanip_##function, n); }
144:
145: __DEFINE_IOMANIP_FN1( smanip, int, setbase)
146: __DEFINE_IOMANIP_FN1( smanip, int, setfill)
147: __DEFINE_IOMANIP_FN1( smanip, int, setprecision)
148: __DEFINE_IOMANIP_FN1( smanip, int, setw)
149:
150: __DEFINE_IOMANIP_FN1( smanip, ios::fmtflags, resetiosflags)
151: __DEFINE_IOMANIP_FN1( smanip, ios::fmtflags, setiosflags)
152:
153: #endif /*!_IOMANIP_H*/
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