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iostream.hfa

Last change on this file was 0528d79, checked in by Peter A. Buhr <pabuhr@…>, 2 months ago
fix bugs reading enumerators
Property mode set to `100644`
File size: 24.2 KB

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1	//
2	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3	//
4	// The contents of this file are covered under the licence agreement in the
5	// file "LICENCE" distributed with Cforall.
6	//
7	// iostream.hfa --
8	//
9	// Author : Peter A. Buhr
10	// Created On : Wed May 27 17:56:53 2015
11	// Last Modified By : Peter A. Buhr
12	// Last Modified On : Mon May 12 17:29:29 2025
13	// Update Count : 769
14	//
15
16	#pragma once
17
18	#include "iterator.hfa"
19	#include "Exception.hfa"
20
21	// ********************************* ostream *********************************
22
23	forall( ostype & )
24	struct basic_ostream_data {
25	// private
26	bool (*sepPrt$)( ostype & ); // get separator state (on/off)
27	void (*sepReset$)( ostype & ); // set separator state to default state
28	void (*sepReset$)( ostype &, bool ); // set separator and default state
29	const char * (*sepGetCur$)( ostype & ); // get current separator string
30	void (*sepSetCur$)( ostype &, const char [] ); // set current separator string
31	bool (*getNL$)( ostype & ); // get newline
32	bool (*setNL$)( ostype &, bool ); // set newline
33	bool (*getANL$)( ostype & ); // get auto newline (on/off)
34	bool (*setANL$)( ostype &, bool ); // set auto newline (on/off), and return previous state
35	bool (*getPrt$)( ostype & ); // get fmt called in output cascade
36	bool (*setPrt$)( ostype &, bool ); // set fmt called in output cascade
37	// public
38	void (*nlOn)( ostype & ); // turn auto-newline state on
39	void (*nlOff)( ostype & ); // turn auto-newline state off
40
41	void (*sep)( ostype & ); // turn separator state on
42	void (*nosep)( ostype & ); // turn separator state off
43	bool (*sepOn)( ostype & ); // set default state to on, and return previous state
44	bool (*sepOff)( ostype & ); // set default state to off, and return previous state
45	const char * (*sepGet)( ostype & ); // get separator string
46	void (*sepSet)( ostype &, const char [] ); // set separator to string (15 character maximum)
47	const char * (*sepGetTuple)( ostype & ); // get tuple separator string
48	void (*sepSetTuple)( ostype &, const char [] ); // set tuple separator to string (15 character maximum)
49
50	void (*ends)( ostype & ); // end of output statement
51	int (*fmt)( ostype &, const char format[], ... ) __attribute__(( format(printf, 2, 3) ));
52	}; // basic_ostream
53
54	forall( ostype & )
55	struct ostream_data {
56	inline basic_ostream_data( ostype );
57	bool (*fail)( ostype & ); // operation failed?
58	void (*clearerr)( ostype & );
59	int (*flush)( ostype & );
60	void (*open)( ostype &, const char name[], const char mode[] );
61	void (*close)( ostype & );
62	ostype & (*write)( ostype &, const char [], size_t );
63	}; // ostream
64
65	forall( ostype & )
66	trait basic_ostream {
67	basic_ostream_data(ostype) const & basic_ostream_table;
68	};
69
70	forall( ostype & \| basic_ostream( ostype ) )
71	trait ostream {
72	ostream_data(ostype) const & ostream_table;
73	};
74
75	// forall( T )
76	// trait writeable {
77	// forall( ostype & \| ostream( ostype ) ) ostype & ?\|?( ostype &, T );
78	// }; // writeable
79
80	forall( T, ostype & \| ostream( ostype ) )
81	trait writeable {
82	ostype & ?\|?( ostype &, T );
83	}; // writeable
84
85	// implement writable for intrinsic types
86
87	#define OSTYPE_VOID( T ) void ?\|?( ostype &, T )
88	#define OSTYPE_VOID_IMPL( os, T ) \
89	void ?\|?( ostype & os, T t ) { \
90	(ostype &)(os \| t); \
91	basic_ostream_table.ends( os ); \
92	} // ?\|?
93
94	forall( ostype & \| basic_ostream( ostype ) ) {
95	ostype & ?\|?( ostype &, bool );
96	OSTYPE_VOID( bool );
97
98	ostype & ?\|?( ostype &, char );
99	OSTYPE_VOID( char );
100	ostype & ?\|?( ostype &, signed char );
101	OSTYPE_VOID( signed char );
102	ostype & ?\|?( ostype &, unsigned char );
103	OSTYPE_VOID( unsigned char );
104
105	ostype & ?\|?( ostype &, short int );
106	OSTYPE_VOID( short int );
107	ostype & ?\|?( ostype &, unsigned short int );
108	OSTYPE_VOID( unsigned short int );
109	ostype & ?\|?( ostype &, int );
110	OSTYPE_VOID( int );
111	ostype & ?\|?( ostype &, unsigned int );
112	OSTYPE_VOID( unsigned int );
113	ostype & ?\|?( ostype &, long int );
114	OSTYPE_VOID( long int );
115	ostype & ?\|?( ostype &, long long int );
116	OSTYPE_VOID( long long int );
117	ostype & ?\|?( ostype &, unsigned long int );
118	OSTYPE_VOID( unsigned long int );
119	ostype & ?\|?( ostype &, unsigned long long int );
120	OSTYPE_VOID( unsigned long long int );
121	#if defined( __SIZEOF_INT128__ )
122	ostype & ?\|?( ostype &, int128 );
123	OSTYPE_VOID( int128 );
124	ostype & ?\|?( ostype &, unsigned int128 );
125	OSTYPE_VOID( unsigned int128 );
126	#endif // __SIZEOF_INT128__
127
128	ostype & ?\|?( ostype &, float );
129	OSTYPE_VOID( float );
130	ostype & ?\|?( ostype &, double );
131	OSTYPE_VOID( double );
132	ostype & ?\|?( ostype &, long double );
133	OSTYPE_VOID( long double );
134
135	ostype & ?\|?( ostype &, float _Complex );
136	OSTYPE_VOID( float _Complex );
137	ostype & ?\|?( ostype &, double _Complex );
138	OSTYPE_VOID( double _Complex );
139	ostype & ?\|?( ostype &, long double _Complex );
140	OSTYPE_VOID( long double _Complex );
141
142	ostype & ?\|?( ostype &, const char [] );
143	OSTYPE_VOID( const char [] );
144	// ostype & ?\|?( ostype &, const char16_t [] );
145	#if ! ( __ARM_ARCH_ISA_ARM == 1 && __ARM_32BIT_STATE == 1 ) // char32_t == wchar_t => ambiguous
146	// ostype & ?\|?( ostype &, const char32_t [] );
147	#endif // ! ( __ARM_ARCH_ISA_ARM == 1 && __ARM_32BIT_STATE == 1 )
148	// ostype & ?\|?( ostype &, const wchar_t [] );
149	ostype & ?\|?( ostype &, const void * );
150	OSTYPE_VOID( const void * );
151
152	// FIX-ME: does not work so using macros
153	// forall( T \| { ostype & ?\|?( ostype &, T ); } )
154	// void ?\|?( ostype & os, T );
155
156	// manipulators
157	ostype & ?\|?( ostype &, ostype & (*)( ostype & ) );
158	OSTYPE_VOID( ostype & (*)( ostype & ) );
159
160	ostype & nl( ostype & );
161	ostype & nonl( ostype & );
162	ostype & nlOn( ostype & );
163	ostype & nlOff( ostype & );
164
165	ostype & sepVal( ostype & );
166	ostype & sepTupleVal( ostype & );
167	ostype & sep( ostype & );
168	ostype & nosep( ostype & );
169	ostype & sepOn( ostype & );
170	ostype & sepOff( ostype & );
171	} // distribution
172
173	// tuples
174	forall( ostype &, T, List ... \| writeable( T, ostype ) \| { ostype & ?\|?( ostype &, List ); } ) {
175	ostype & ?\|?( ostype & os, T arg, List rest );
176	void ?\|?( ostype & os, T arg, List rest );
177	} // distribution
178
179	// writes the range [begin, end) to the given stream
180	forall( ostype &, elt_type \| writeable( elt_type, ostype ), iterator_type \| iterator( iterator_type, elt_type ) ) {
181	void write( iterator_type begin, iterator_type end, ostype & os );
182	void write_reverse( iterator_type begin, iterator_type end, ostype & os );
183	} // distribution
184
185	// ********************************* manipulators *********************************
186
187	struct _Ostream_Flags {
188	unsigned char eng:1; // engineering notation
189	unsigned char neg:1; // val is negative
190	unsigned char pc:1; // precision specified
191	unsigned char left:1; // left justify
192	unsigned char nobsdp:1; // base prefix / decimal point
193	unsigned char sign:1; // plus / minus sign
194	unsigned char pad0:1; // zero pad
195	};
196
197	// FIXME: Should be an anonymous inner union of _Ostream_Manip.
198	// Hoisting manually to work around warning of #294.
199	union _Ostream_Manip_Mode {
200	unsigned char all;
201	_Ostream_Flags flags;
202	};
203
204	forall( T )
205	struct _Ostream_Manip {
206	T val; // polymorphic base-type
207	int wd, pc; // width, precision: signed for computations
208	char base; // numeric base / floating-point style
209	inline _Ostream_Manip_Mode;
210	}; // _Ostream_Manip
211
212	// ********************************* integral *********************************
213
214	#define INTEGRAL_FMT_DECL( T, CODE ) \
215	static inline { \
216	_Ostream_Manip(T) bin( T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = 1, .pc = 0, .base = 'b', { .all = 0 } }; } \
217	_Ostream_Manip(T) oct( T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = 1, .pc = 0, .base = 'o', { .all = 0 } }; } \
218	_Ostream_Manip(T) hex( T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = 1, .pc = 0, .base = 'x', { .all = 0 } }; } \
219	_Ostream_Manip(T) wd( unsigned int wd, T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = wd, .pc = 0, .base = CODE, { .all = 0 } }; } \
220	_Ostream_Manip(T) wd( unsigned int wd, unsigned int pc, T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = wd, .pc = pc, .base = CODE, { .flags.pc = true } }; } \
221	_Ostream_Manip(T) & wd( unsigned int wd, _Ostream_Manip(T) & fmt ) { fmt.wd = wd; return fmt; } \
222	_Ostream_Manip(T) & wd( unsigned int wd, unsigned int pc, _Ostream_Manip(T) & fmt ) { fmt.wd = wd; fmt.pc = pc; fmt.flags.pc = true; return fmt; } \
223	_Ostream_Manip(T) & left( _Ostream_Manip(T) & fmt ) { fmt.flags.left = true; return fmt; } \
224	_Ostream_Manip(T) & upcase( _Ostream_Manip(T) & fmt ) { if ( fmt.base == 'x' \|\| fmt.base == 'b' ) fmt.base -= 32; /* upper case */ return fmt; } \
225	_Ostream_Manip(T) & nobase( _Ostream_Manip(T) & fmt ) { fmt.flags.nobsdp = true; return fmt; } \
226	_Ostream_Manip(T) & pad0( _Ostream_Manip(T) & fmt ) { fmt.flags.pad0 = true; return fmt; } \
227	_Ostream_Manip(T) sign( T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = 1, .pc = 0, .base = CODE, { .flags.sign = true } }; } \
228	_Ostream_Manip(T) & sign( _Ostream_Manip(T) & fmt ) { fmt.flags.sign = true; return fmt; } \
229	} /* distribution */ \
230	forall( ostype & \| basic_ostream( ostype ) ) { \
231	ostype & ?\|?( ostype & os, _Ostream_Manip(T) f ); \
232	OSTYPE_VOID( _Ostream_Manip(T) ); \
233	} // ?\|?
234
235	INTEGRAL_FMT_DECL( signed char, 'd' )
236	INTEGRAL_FMT_DECL( unsigned char, 'u' )
237	INTEGRAL_FMT_DECL( signed short int, 'd' )
238	INTEGRAL_FMT_DECL( unsigned short int, 'u' )
239	INTEGRAL_FMT_DECL( signed int, 'd' )
240	INTEGRAL_FMT_DECL( unsigned int, 'u' )
241	INTEGRAL_FMT_DECL( signed long int, 'd' )
242	INTEGRAL_FMT_DECL( unsigned long int, 'u' )
243	INTEGRAL_FMT_DECL( signed long long int, 'd' )
244	INTEGRAL_FMT_DECL( unsigned long long int, 'u' )
245	#if defined( __SIZEOF_INT128__ )
246	INTEGRAL_FMT_DECL( int128, 'd' )
247	INTEGRAL_FMT_DECL( unsigned int128, 'u' )
248	#endif // __SIZEOF_INT128__
249
250	// ********************************* floating point *********************************
251
252	// Default suffix for values with no fraction is "."
253	#define FLOATING_POINT_FMT_DECL( T ) \
254	static inline { \
255	_Ostream_Manip(T) hex( T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = 1, .pc = 0, .base = 'a', { .all = 0 } }; } \
256	_Ostream_Manip(T) sci( T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = 1, .pc = 0, .base = 'e', { .all = 0 } }; } \
257	_Ostream_Manip(T) eng( T val ) { return (_Ostream_Manip(T))@{ .val = val, 1, -1, .base = 'g', { .flags.eng = true } }; } \
258	_Ostream_Manip(T) wd( unsigned int wd, T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = wd, .pc = 0, .base = 'g', { .all = 0 } }; } \
259	_Ostream_Manip(T) wd( unsigned int wd, unsigned int pc, T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = wd, .pc = pc, .base = 'f', { .flags.pc = true } }; } \
260	_Ostream_Manip(T) ws( unsigned int wd, unsigned int pc, T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = wd, .pc = pc, .base = 'g', { .flags.pc = true } }; } \
261	_Ostream_Manip(T) & wd( unsigned int wd, _Ostream_Manip(T) & fmt ) { if ( fmt.flags.eng ) fmt.base = 'f'; fmt.wd = wd; return fmt; } \
262	_Ostream_Manip(T) & wd( unsigned int wd, unsigned int pc, _Ostream_Manip(T) & fmt ) { \
263	if ( fmt.flags.eng ) fmt.base = 'f'; fmt.wd = wd; fmt.pc = pc; fmt.flags.pc = true; return fmt; } \
264	_Ostream_Manip(T) & ws( unsigned int wd, unsigned int pc, _Ostream_Manip(T) & fmt ) { fmt.wd = wd; fmt.pc = pc; fmt.flags.pc = true; return fmt; } \
265	_Ostream_Manip(T) & left( _Ostream_Manip(T) & fmt ) { fmt.flags.left = true; return fmt; } \
266	_Ostream_Manip(T) upcase( T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = 1, .pc = 0, .base = 'G', { .all = 0 } }; } \
267	_Ostream_Manip(T) & upcase( _Ostream_Manip(T) & fmt ) { fmt.base -= 32; /* upper case */ return fmt; } \
268	_Ostream_Manip(T) & pad0( _Ostream_Manip(T) & fmt ) { fmt.flags.pad0 = true; return fmt; } \
269	_Ostream_Manip(T) sign( T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = 1, .pc = 0, .base = 'g', { .flags.sign = true } }; } \
270	_Ostream_Manip(T) & sign( _Ostream_Manip(T) & fmt ) { fmt.flags.sign = true; return fmt; } \
271	_Ostream_Manip(T) nodp( T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = 1, .pc = 0, .base = 'g', { .flags.nobsdp = true } }; } \
272	_Ostream_Manip(T) & nodp( _Ostream_Manip(T) & fmt ) { fmt.flags.nobsdp = true; return fmt; } \
273	_Ostream_Manip(T) unit( T val ) { return (_Ostream_Manip(T))@{ .val = val, .wd = 1, .pc = 0, .base = 'g', { .flags.nobsdp = true } }; } \
274	_Ostream_Manip(T) & unit( _Ostream_Manip(T) & fmt ) { fmt.flags.nobsdp = true; return fmt; } \
275	} /* distribution */ \
276	forall( ostype & \| basic_ostream( ostype ) ) { \
277	ostype & ?\|?( ostype & os, _Ostream_Manip(T) f ); \
278	OSTYPE_VOID( _Ostream_Manip(T) ); \
279	} // ?\|?
280
281	FLOATING_POINT_FMT_DECL( double )
282	FLOATING_POINT_FMT_DECL( long double )
283
284	// ********************************* character *********************************
285
286	static inline {
287	_Ostream_Manip(char) bin( char c ) { return (_Ostream_Manip(char))@{ .val = c, .wd = 1, .pc = 0, .base = 'b', { .all = 0 } }; }
288	_Ostream_Manip(char) oct( char c ) { return (_Ostream_Manip(char))@{ .val = c, .wd = 1, .pc = 0, .base = 'o', { .all = 0 } }; }
289	_Ostream_Manip(char) hex( char c ) { return (_Ostream_Manip(char))@{ .val = c, .wd = 1, .pc = 0, .base = 'x', { .all = 0 } }; }
290	_Ostream_Manip(char) wd( unsigned int wd, char c ) { return (_Ostream_Manip(char))@{ c, wd, 0, .base = 'c', { .all = 0 } }; }
291	_Ostream_Manip(char) & wd( unsigned int wd, _Ostream_Manip(char) & fmt ) { fmt.wd = wd; return fmt; }
292	_Ostream_Manip(char) & left( _Ostream_Manip(char) & fmt ) { fmt.flags.left = true; return fmt; }
293	_Ostream_Manip(char) & upcase( _Ostream_Manip(char) & fmt ) { if ( fmt.base == 'x' \|\| fmt.base == 'b' ) fmt.base -= 32; /* upper case */ return fmt; }
294	_Ostream_Manip(char) & nobase( _Ostream_Manip(char) & fmt ) { fmt.flags.nobsdp = true; return fmt; }
295	} // distribution
296	forall( ostype & \| basic_ostream( ostype ) ) {
297	ostype & ?\|?( ostype & os, _Ostream_Manip(char) f );
298	OSTYPE_VOID( _Ostream_Manip(char) ); \
299	} // ?\|?
300
301	// ********************************* C string *********************************
302
303	static inline {
304	_Ostream_Manip(const char ) bin( const char s[] ) { return (_Ostream_Manip(const char ))@{ .val = s, .wd = 1, .pc = 0, .base = 'b', { .all = 0 } }; }
305	_Ostream_Manip(const char ) oct( const char s[] ) { return (_Ostream_Manip(const char ))@{ .val = s, .wd = 1, .pc = 0, .base = 'o', { .all = 0 } }; }
306	_Ostream_Manip(const char ) hex( const char s[] ) { return (_Ostream_Manip(const char ))@{ .val = s, .wd = 1, .pc = 0, .base = 'x', { .all = 0 } }; }
307	_Ostream_Manip(const char ) wd( unsigned int wd, const char s[] ) { return (_Ostream_Manip(const char ))@{ s, wd, 0, .base = 's', { .all = 0 } }; }
308	_Ostream_Manip(const char ) wd( unsigned int wd, unsigned int pc, const char s[] ) { return (_Ostream_Manip(const char ))@{ s, .wd = wd, .pc = pc, .base = 's', { .flags.pc = true } }; }
309	_Ostream_Manip(const char ) & wd( unsigned int wd, _Ostream_Manip(const char ) & fmt ) { fmt.wd = wd; return fmt; }
310	_Ostream_Manip(const char ) & wd( unsigned int wd, unsigned int pc, _Ostream_Manip(const char ) & fmt ) { fmt.wd = wd; fmt.pc = pc; fmt.flags.pc = true; return fmt; }
311	_Ostream_Manip(const char ) & left( _Ostream_Manip(const char ) & fmt ) { fmt.flags.left = true; return fmt; }
312	_Ostream_Manip(const char ) & nobase( _Ostream_Manip(const char ) & fmt ) { fmt.flags.nobsdp = true; return fmt; }
313	} // distribution
314	forall( ostype & \| basic_ostream( ostype ) ) {
315	ostype & ?\|?( ostype & os, _Ostream_Manip(const char *) f );
316	OSTYPE_VOID( _Ostream_Manip(const char *) ); \
317	} // ?\|?
318
319
320	// ********************************* istream *********************************
321
322
323	forall( istype & )
324	struct basic_istream_data {
325	// private
326	bool (*getANL$)( istype & ); // get scan newline (on/off)
327	bool (*setANL$)( istype &, bool ); // set scan newline (on/off)
328	// public
329	void (*nlOn)( istype & ); // read newline
330	void (*nlOff)( istype & ); // scan newline
331	int (*fmt)( istype &, const char format[], ... ) __attribute__(( format(scanf, 2, 3) ));
332	istype & (*ungetc)( char, istype & );
333	bool (*eof)( istype & );
334	void (*clearerr)( istype & );
335	}; // basic_istream
336
337	forall( istype & )
338	struct istream_data {
339	inline basic_istream_data( istype );
340	bool (*fail)( istype & );
341	void (*open)( istype & is, const char name[], const char mode[] );
342	void (*open)( istype & is, const char name[] );
343	void (*close)( istype & is );
344	istype & (*read)( istype &, char [], size_t );
345	}; // istream
346
347	forall( istype & )
348	trait basic_istream {
349	basic_istream_data(istype) const & basic_istream_table;
350	};
351
352	forall( istype & \| basic_istream( istype ) )
353	trait istream {
354	istream_data(istype) const & istream_table;
355	};
356
357	forall( T )
358	trait readable {
359	forall( istype & \| istream( istype ) ) istype & ?\|?( istype &, T );
360	}; // readable
361
362	forall( istype & \| basic_istream( istype ) ) {
363	istype & ?\|?( istype &, bool & );
364
365	istype & ?\|?( istype &, char & );
366	istype & ?\|?( istype &, signed char & );
367	istype & ?\|?( istype &, unsigned char & );
368
369	istype & ?\|?( istype &, short int & );
370	istype & ?\|?( istype &, unsigned short int & );
371	istype & ?\|?( istype &, int & );
372	istype & ?\|?( istype &, unsigned int & );
373	istype & ?\|?( istype &, long int & );
374	istype & ?\|?( istype &, unsigned long int & );
375	istype & ?\|?( istype &, long long int & );
376	istype & ?\|?( istype &, unsigned long long int & );
377	#if defined( __SIZEOF_INT128__ )
378	istype & ?\|?( istype &, int128 & );
379	istype & ?\|?( istype &, unsigned int128 & );
380	#endif // __SIZEOF_INT128__
381
382	istype & ?\|?( istype &, float & );
383	istype & ?\|?( istype &, double & );
384	istype & ?\|?( istype &, long double & );
385
386	istype & ?\|?( istype &, float _Complex & );
387	istype & ?\|?( istype &, double _Complex & );
388	istype & ?\|?( istype &, long double _Complex & );
389
390	// This is too restrictive as it prevents building a format in a string and using that format.
391	// inline istype & ?\|?( istype &, char [] ) { // possible error, too restrictive to change
392	// _Static_assert( false, "reading a character array without a maximum length is unsafe. Use input manipulator \"wdi( N, s )\", where \"char s[N]\" or fmt( s )." );
393	// }
394	istype & ?\|?( istype &, const char [] ); // match text
395
396	// manipulators
397	istype & ?\|?( istype &, istype & (*)( istype & ) );
398	istype & nl( istype & is );
399	istype & nlOn( istype & );
400	istype & nlOff( istype & );
401	} // distribution
402
403	// ********************************* exceptions *********************************
404
405	ExceptionDecl( end_of_file ); // read encounters end of file
406	ExceptionDecl( missing_data ); // read finds no appropriate data
407	ExceptionDecl( cstring_length ); // character string size exceeded
408	ExceptionDecl( data_range ); // value too large for numerical type
409
410	// ********************************* manipulators *********************************
411
412	// skip does not compose with other C string manipulators.
413	struct _Istream_Cskip {
414	const char * scanset;
415	unsigned wd; // scan width
416	}; // _Istream_Cskip
417
418	static inline {
419	_Istream_Cskip skip( const char scanset[] ) { return (_Istream_Cskip)@{ .scanset = scanset, .wd = 0 }; }
420	_Istream_Cskip skip( unsigned int wd ) { return (_Istream_Cskip)@{ .scanset = 0p, .wd = wd }; }
421	} // distribution
422
423	struct _Istream_str_base {
424	union {
425	const char * scanset;
426	char delimiters[3]; // [0] => left, [1] => right
427	};
428	int wd; // width
429	union {
430	unsigned char all;
431	struct {
432	unsigned char ignore:1; // do not change input argument
433	unsigned char inex:1; // include/exclude characters in scanset
434	unsigned char delimiter:1; // delimit character(s)
435	unsigned char rwd:1; // read width
436	} flags;
437	};
438	}; // _Istream_str_base
439
440	struct _Istream_Cwidth {
441	char * s;
442	inline _Istream_str_base;
443	}; // _Istream_Cwidth
444
445	// Restrict nesting of input manipulators to those combinations that make sense.
446
447	struct _Istream_Cquote {
448	_Istream_Cwidth cstr;
449	}; // _Istream_Cquote
450
451	struct _Istream_Cstr {
452	_Istream_Cwidth cstr;
453	}; // _Istream_Cstr
454
455	static inline {
456	// width must include room for null terminator, (gcc) scanf does not allow a 0 width => wd > 1 (1 char and null) and rd > 0 (1 char);
457	_Istream_Cwidth wdi( unsigned int wd, char s[] ) {
458	if ( wd <= 1 ) throwResume ExceptionInst( cstring_length ); // minimum 1 character and null terminator
459	return (_Istream_Cwidth)@{ .s = s, { {.scanset = 0p}, .wd = wd, {.all = 0} } };
460	}
461	_Istream_Cwidth wdi( unsigned int wd, unsigned int rwd, char s[] ) {
462	if ( wd <= 1 \|\| wd <= rwd ) throwResume ExceptionInst( cstring_length ); // minimum 1 character, null terminator, plus subset
463	return (_Istream_Cwidth)@{ .s = s, { {.scanset = 0p}, .wd = rwd, {.flags.rwd = true} } };
464	}
465	_Istream_Cstr & getline( _Istream_Cwidth & f, const char delimiter = '\n' ) {
466	f.delimiters[0] = delimiter; f.delimiters[1] = '\0'; f.flags.delimiter = true; return (_Istream_Cstr &)f;
467	}
468	_Istream_Cquote quote( char & ch, const char Ldelimiter = '\'', const char Rdelimiter = '\0' ) {
469	return (_Istream_Cquote)@{ { .s = &ch, { {.delimiters = { Ldelimiter, Rdelimiter, '\1' }}, .wd = 1, {.flags.rwd = true} } } };
470	}
471	_Istream_Cquote & quote( _Istream_Cwidth & f, const char Ldelimiter = '"', const char Rdelimiter = '\0' ) {
472	f.delimiters[0] = Ldelimiter; f.delimiters[1] = Rdelimiter; f.delimiters[2] = '\0';
473	return (_Istream_Cquote &)f;
474	}
475	_Istream_Cstr & incl( const char scanset[], _Istream_Cwidth & f ) { f.scanset = scanset; f.flags.inex = false; return (_Istream_Cstr &)f; }
476	_Istream_Cstr & excl( const char scanset[], _Istream_Cwidth & f ) { f.scanset = scanset; f.flags.inex = true; return (_Istream_Cstr &)f; }
477	_Istream_Cstr ignore( const char s[] ) { return (_Istream_Cstr)@{ { .s = (char *)s, { {.scanset = 0p}, .wd = -1, {.flags.ignore = true} } } }; }
478	_Istream_Cstr & ignore( _Istream_Cwidth & f ) { f.flags.ignore = true; return (_Istream_Cstr &)f; }
479	_Istream_Cquote & ignore( _Istream_Cquote & f ) { f.cstr.flags.ignore = true; return (_Istream_Cquote &)f; }
480	_Istream_Cstr & ignore( _Istream_Cstr & f ) { f.cstr.flags.ignore = true; return (_Istream_Cstr &)f; }
481	} // distribution
482
483	forall( istype & \| basic_istream( istype ) ) {
484	istype & ?\|?( istype & is, _Istream_Cskip f );
485	istype & ?\|?( istype & is, _Istream_Cquote f );
486	istype & ?\|?( istype & is, _Istream_Cstr f );
487	static inline istype & ?\|?( istype & is, _Istream_Cwidth f ) { return is \| (_Istream_Cstr )&f; }
488	} // distribution
489
490	// FIXME: `\| sized(T)` seems to be working around a bug, but it is logically unnecessary.
491	// Including sized(T) causes a warning that is telling us to get rid of it.
492	#pragma GCC diagnostic push
493	#pragma GCC diagnostic ignored "-Wunused-parameter"
494	forall( T & \| sized(T) )
495	struct _Istream_Manip {
496	T & val; // polymorphic base-type
497	int wd; // width
498	bool ignore; // do not change input argument
499	}; // _Istream_Manip
500	#pragma GCC diagnostic pop
501
502	#define INPUT_FMT_DECL( T ) \
503	static inline { \
504	_Istream_Manip(T) wdi( unsigned int wd, T & val ) { return (_Istream_Manip(T))@{ .val = val, .wd = wd, .ignore = false }; } \
505	_Istream_Manip(T) ignore( const T & val ) { return (_Istream_Manip(T))@{ .val = (T &)val, .wd = -1, .ignore = true }; } \
506	_Istream_Manip(T) & ignore( _Istream_Manip(T) & fmt ) { fmt.ignore = true; return fmt; } \
507	} /* distribution */ \
508	forall( istype & \| basic_istream( istype ) ) { \
509	istype & ?\|?( istype & is, _Istream_Manip(T) f ); \
510	} // ?\|?
511
512	INPUT_FMT_DECL( char )
513	INPUT_FMT_DECL( signed char )
514	INPUT_FMT_DECL( unsigned char )
515	INPUT_FMT_DECL( signed short int )
516	INPUT_FMT_DECL( unsigned short int )
517	INPUT_FMT_DECL( signed int )
518	INPUT_FMT_DECL( unsigned int )
519	INPUT_FMT_DECL( signed long int )
520	INPUT_FMT_DECL( unsigned long int )
521	INPUT_FMT_DECL( signed long long int )
522	INPUT_FMT_DECL( unsigned long long int )
523
524	INPUT_FMT_DECL( float )
525	INPUT_FMT_DECL( double )
526	INPUT_FMT_DECL( long double )
527
528	INPUT_FMT_DECL( float _Complex )
529	INPUT_FMT_DECL( double _Complex )
530	INPUT_FMT_DECL( long double _Complex )
531
532	// ********************************* enumerations *********************************
533
534	forall( istype & \| istream( istype ), E \| CfaEnum( E ) \| Serial(E) )
535	istype & ?\|?( istype &, E & );
536
537	forall( ostype & \| ostream( ostype ), E \| CfaEnum( E ) ) {
538	ostype & ?\|?( ostype &, E );
539	OSTYPE_VOID( E );
540	}
541
542	// ********************************* time *********************************
543
544	#include <time_t.hfa> // Duration (constructors) / Time (constructors)
545
546	forall( ostype & \| ostream( ostype ) ) {
547	ostype & ?\|?( ostype & os, Duration dur );
548	OSTYPE_VOID( Duration );
549	ostype & ?\|?( ostype & os, Time time );
550	OSTYPE_VOID( Time );
551	} // distribution
552
553	// Local Variables: //
554	// tab-width: 4 //
555	// End: //

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