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iostream.cfa@ 8cffa4f

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Last change on this file since 8cffa4f was 8cffa4f, checked in by Michael Brooks <mlbrooks@…>, 2 years ago

Support match-failure reporting for string input.

On failed match, assign the empty-string value to the target.
Prior handling did not modify the target,
which in context like char s[10]; sin | exclude("\n", s);,
left s uninitialized, and invalid for strlen, when the input's next character is a newline.
In this case, scanf offers the return value, the count of output arguments written,
to say, "I did not write to your buffer," a feature lost in the pipe abstraction.

Add tests to exercise such cases.

(Prior "leave uninitialized" treatment was discovered by surprise, while debugging a test program for an upcoming commit.)

Property mode set to 100644

File size: 38.1 KB

Line
1
2	//
3	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
4	//
5	// The contents of this file are covered under the licence agreement in the
6	// file "LICENCE" distributed with Cforall.
7	//
8	// iostream.cfa --
9	//
10	// Author : Peter A. Buhr
11	// Created On : Wed May 27 17:56:53 2015
12	// Last Modified By : Peter A. Buhr
13	// Last Modified On : Sat Sep 2 14:42:01 2023
14	// Update Count : 1561
15	//
16
17	#include "iostream.hfa"
18
19	#include <stdio.h>
20	#include <stdbool.h> // true/false
21	#include <stdint.h> // UINT64_MAX
22	#include <float.h> // DBL_DIG, LDBL_DIG
23	#include <complex.h> // creal, cimag
24	//#include <stdio.h>
25
26	extern "C" {
27	extern size_t strlen (const char *__s) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1)));
28	extern int strcmp (const char __s1, const char __s2) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
29	extern char strcpy (char __restrict __dest, const char *__restrict __src) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__nonnull__ (1, 2)));
30	extern void memcpy (void __restrict __dest, const void *__restrict __src, size_t __n) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__nonnull__ (1, 2)));
31	} // extern "C"
32
33	#include "math.hfa" // isfinite, floor, ceiling_div
34	#include "bitmanip.hfa" // high1
35
36	#pragma GCC visibility push(default)
37
38
39	// ********************************* ostream *********************************
40
41
42	forall( ostype & \| basic_ostream( ostype ) ) {
43	ostype & ?\|?( ostype & os, bool b ) {
44	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
45	fmt( os, "%s", b ? "true" : "false" );
46	return os;
47	} // ?\|?
48	OSTYPE_VOID_IMPL( bool )
49
50	ostype & ?\|?( ostype & os, char c ) {
51	fmt( os, "%c", c );
52	if ( c == '\n' ) setNL$( os, true );
53	return nosep( os );
54	} // ?\|?
55	OSTYPE_VOID_IMPL( char )
56
57	ostype & ?\|?( ostype & os, signed char sc ) {
58	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
59	fmt( os, "%'hhd", sc );
60	return os;
61	} // ?\|?
62	OSTYPE_VOID_IMPL( signed char )
63
64	ostype & ?\|?( ostype & os, unsigned char usc ) {
65	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
66	fmt( os, "%'hhu", usc );
67	return os;
68	} // ?\|?
69	OSTYPE_VOID_IMPL( unsigned char )
70
71	ostype & ?\|?( ostype & os, short int si ) {
72	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
73	fmt( os, "%'hd", si );
74	return os;
75	} // ?\|?
76	OSTYPE_VOID_IMPL( short int )
77
78	ostype & ?\|?( ostype & os, unsigned short int usi ) {
79	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
80	fmt( os, "%'hu", usi );
81	return os;
82	} // ?\|?
83	OSTYPE_VOID_IMPL( unsigned short int )
84
85	ostype & ?\|?( ostype & os, int i ) {
86	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
87	fmt( os, "%'d", i );
88	return os;
89	} // ?\|?
90	OSTYPE_VOID_IMPL( int )
91
92	ostype & ?\|?( ostype & os, unsigned int ui ) {
93	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
94	fmt( os, "%'u", ui );
95	return os;
96	} // ?\|?
97	OSTYPE_VOID_IMPL( unsigned int )
98
99	ostype & ?\|?( ostype & os, long int li ) {
100	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
101	fmt( os, "%'ld", li );
102	return os;
103	} // ?\|?
104	OSTYPE_VOID_IMPL( long int )
105
106	ostype & ?\|?( ostype & os, unsigned long int uli ) {
107	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
108	fmt( os, "%'lu", uli );
109	return os;
110	} // ?\|?
111	OSTYPE_VOID_IMPL( unsigned long int )
112
113	ostype & ?\|?( ostype & os, long long int lli ) {
114	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
115	fmt( os, "%'lld", lli );
116	return os;
117	} // ?\|?
118	OSTYPE_VOID_IMPL( long long int )
119
120	ostype & ?\|?( ostype & os, unsigned long long int ulli ) {
121	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
122	fmt( os, "%'llu", ulli );
123	return os;
124	} // ?\|?
125	OSTYPE_VOID_IMPL( unsigned long long int )
126
127	#if defined( __SIZEOF_INT128__ )
128	// UINT64_MAX 18_446_744_073_709_551_615_ULL
129	#define P10_UINT64 10_000_000_000_000_000_000_ULL // 19 zeroes
130
131	static inline void base10_128( ostype & os, unsigned int128 val ) {
132	#if defined(__GNUC__) && __GNUC_PREREQ(7,0) // gcc version >= 7
133	if ( val > P10_UINT64 ) {
134	#else
135	if ( (uint64_t)(val >> 64) != 0 \|\| (uint64_t)val > P10_UINT64 ) { // patch gcc 5 & 6 -O3 bug
136	#endif // __GNUC_PREREQ(7,0)
137	base10_128( os, val / P10_UINT64 ); // recursive
138	fmt( os, "%.19lu", (uint64_t)(val % P10_UINT64) );
139	} else {
140	fmt( os, "%lu", (uint64_t)val );
141	} // if
142	} // base10_128
143
144	static inline void base10_128( ostype & os, int128 val ) {
145	if ( val < 0 ) {
146	fmt( os, "-" ); // leading negative sign
147	val = -val;
148	} // if
149	base10_128( os, (unsigned int128)val ); // print zero/positive value
150	} // base10_128
151
152	ostype & ?\|?( ostype & os, int128 llli ) {
153	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
154	base10_128( os, llli );
155	return os;
156	} // ?\|?
157	OSTYPE_VOID_IMPL( int128 )
158
159	ostype & ?\|?( ostype & os, unsigned int128 ullli ) {
160	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
161	base10_128( os, ullli );
162	return os;
163	} // ?\|?
164	OSTYPE_VOID_IMPL( unsigned int128 )
165	#endif // __SIZEOF_INT128__
166
167	#define PRINT_WITH_DP( os, format, val, ... ) \
168	{ \
169	enum { size = 48 }; \
170	char buf[size]; \
171	int len = snprintf( buf, size, format, ##__VA_ARGS__, val ); \
172	fmt( os, "%s", buf ); \
173	if ( isfinite( val ) ) { /* if number, print decimal point when no fraction or exponent */ \
174	for ( i; 0 ~ @ ) { \
175	if ( i == len ) { fmt( os, "." ); break; } \
176	if ( buf[i] == '.' \|\| buf[i] == 'e' \|\| buf[i] == 'E' \|\| \
177	buf[i] == 'p' \|\| buf[i] == 'P' ) break; /* decimal point or scientific ? */ \
178	} /* for */ \
179	} /* if */ \
180	}
181
182	ostype & ?\|?( ostype & os, float f ) {
183	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
184	PRINT_WITH_DP( os, "%'g", f );
185	return os;
186	} // ?\|?
187	OSTYPE_VOID_IMPL( float )
188
189	ostype & ?\|?( ostype & os, double d ) {
190	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
191	PRINT_WITH_DP( os, "%'.*lg", d, DBL_DIG );
192	return os;
193	} // ?\|?
194	OSTYPE_VOID_IMPL( double )
195
196	ostype & ?\|?( ostype & os, long double ld ) {
197	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
198	PRINT_WITH_DP( os, "%'.*Lg", ld, LDBL_DIG );
199	return os;
200	} // ?\|?
201	OSTYPE_VOID_IMPL( long double )
202
203	ostype & ?\|?( ostype & os, float _Complex fc ) {
204	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
205	// os \| crealf( fc ) \| nonl;
206	PRINT_WITH_DP( os, "%'g", crealf( fc ) );
207	PRINT_WITH_DP( os, "%'+g", cimagf( fc ) );
208	fmt( os, "i" );
209	return os;
210	} // ?\|?
211	OSTYPE_VOID_IMPL( float _Complex )
212
213	ostype & ?\|?( ostype & os, double _Complex dc ) {
214	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
215	// os \| creal( dc ) \| nonl;
216	PRINT_WITH_DP( os, "%'.*lg", creal( dc ), DBL_DIG );
217	PRINT_WITH_DP( os, "%'+.*lg", cimag( dc ), DBL_DIG );
218	fmt( os, "i" );
219	return os;
220	} // ?\|?
221	OSTYPE_VOID_IMPL( double _Complex )
222
223	ostype & ?\|?( ostype & os, long double _Complex ldc ) {
224	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
225	// os \| creall( ldc ) \|\| nonl;
226	PRINT_WITH_DP( os, "%'.*Lg", creall( ldc ), LDBL_DIG );
227	PRINT_WITH_DP( os, "%'+.*Lg", cimagl( ldc ), LDBL_DIG );
228	fmt( os, "i" );
229	return os;
230	} // ?\|?
231	OSTYPE_VOID_IMPL( long double _Complex )
232
233	ostype & ?\|?( ostype & os, const char s[] ) {
234	enum { Open = 1, Close, OpenClose };
235	static const unsigned char mask[256] @= { // 256 covers all Latin-1 characters
236	// opening delimiters, no space after
237	['('] : Open, ['['] : Open, ['{'] : Open,
238	['='] : Open, ['$'] : Open, [(unsigned char)'£'] : Open, [(unsigned char)'¥'] : Open,
239	[(unsigned char)'¡'] : Open, [(unsigned char)'¿'] : Open, [(unsigned char)'«'] : Open,
240	// closing delimiters, no space before
241	[','] : Close, ['.'] : Close, [';'] : Close, ['!'] : Close, ['?'] : Close,
242	['%'] : Close, [(unsigned char)'¢'] : Close, [(unsigned char)'»'] : Close,
243	[')'] : Close, [']'] : Close, ['}'] : Close,
244	// opening-closing delimiters, no space before or after
245	['\''] : OpenClose, ['`'] : OpenClose, ['"'] : OpenClose, [':'] : OpenClose,
246	[' '] : OpenClose, ['\f'] : OpenClose, ['\n'] : OpenClose, ['\r'] : OpenClose, ['\t'] : OpenClose, ['\v'] : OpenClose, // isspace
247	}; // mask
248
249	if ( s == 0p ) { fmt( os, "%s", "0p" ); return os; } // null pointer
250	if ( s[0] == '\0' ) { nosep( os ); return os; } // null string => no leading/trailing separator
251
252	// first character IS NOT spacing or closing punctuation => add left separator
253	unsigned char ch = s[0]; // must make unsigned
254	if ( sepPrt$( os ) && mask[ ch ] != Close && mask[ ch ] != OpenClose ) {
255	fmt( os, "%s", sepGetCur$( os ) );
256	} // if
257
258	// if string starts line, must reset to determine open state because separator is off
259	sepReset$( os ); // reset separator
260
261	// last character IS spacing or opening punctuation => turn off separator for next item
262	int len = strlen( s );
263	ch = s[len - 1]; // must make unsigned
264	fmt( os, "%s", s ); // fmt resets seperator, but reset it again
265	if ( sepPrt$( os ) && mask[ ch ] != Open && mask[ ch ] != OpenClose ) {
266	sep( os );
267	} else {
268	nosep( os );
269	} // if
270	if ( ch == '\n' ) setNL$( os, true ); // check AFTER sepPrt$ call above as it resets NL flag
271	return os;
272	// return write( os, s, len );
273	} // ?\|?
274	OSTYPE_VOID_IMPL( const char * )
275
276	// ostype & ?\|?( ostype & os, const char16_t s[] ) {
277	// if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
278	// fmt( os, "%ls", s );
279	// return os;
280	// } // ?\|?
281
282	// #if ! ( __ARM_ARCH_ISA_ARM == 1 && __ARM_32BIT_STATE == 1 ) // char32_t == wchar_t => ambiguous
283	// ostype & ?\|?( ostype & os, const char32_t s[] ) {
284	// if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
285	// fmt( os, "%ls", s );
286	// return os;
287	// } // ?\|?
288	// #endif // ! ( __ARM_ARCH_ISA_ARM == 1 && __ARM_32BIT_STATE == 1 )
289
290	// ostype & ?\|?( ostype & os, const wchar_t s[] ) {
291	// if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
292	// fmt( os, "%ls", s );
293	// return os;
294	// } // ?\|?
295
296	ostype & ?\|?( ostype & os, const void * p ) {
297	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
298	fmt( os, "%p", p );
299	return os;
300	} // ?\|?
301	OSTYPE_VOID_IMPL( const void * )
302
303	// manipulators
304	ostype & ?\|?( ostype & os, ostype & (* manip)( ostype & ) ) {
305	return manip( os );
306	} // ?\|?
307	void ?\|?( ostype & os, ostype & (* manip)( ostype & ) ) {
308	manip( os );
309	if ( getPrt$( os ) ) ends( os ); // something printed ?
310	setPrt$( os, false ); // turn off
311	} // ?\|?
312
313	ostype & nl( ostype & os ) {
314	(ostype &)(os \| '\n');
315	setPrt$( os, false ); // turn off
316	setNL$( os, true );
317	return nosep( os ); // prepare for next line
318	} // nl
319
320	ostype & nonl( ostype & os ) {
321	setPrt$( os, false ); // turn off
322	return os;
323	} // nonl
324
325	ostype & nlOn( ostype & os ) {
326	nlOn( os ); // call void returning
327	return os;
328	} // nlOn
329
330	ostype & nlOff( ostype & os ) {
331	nlOff( os ); // call void returning
332	return os;
333	} // nlOff
334
335	ostype & sepVal( ostype & os ) {
336	return (ostype &)(os \| sepGet( os ));
337	} // sepVal
338
339	ostype & sepTupleVal( ostype & os ) {
340	return os \| sepGetTuple( os );
341	} // sepTupleVal
342
343	ostype & sep( ostype & os ) {
344	sep( os ); // call void returning
345	return os;
346	} // sep
347
348	ostype & nosep( ostype & os ) {
349	nosep( os ); // call void returning
350	return os;
351	} // nosep
352
353	ostype & sepOn( ostype & os ) {
354	sepOn( os ); // call void returning
355	return os;
356	} // sepOn
357
358	ostype & sepOff( ostype & os ) {
359	sepOff( os ); // call void returning
360	return os;
361	} // sepOff
362	} // distribution
363
364	// tuples
365	forall( ostype &, T, Params... \| writeable( T, ostype ) \| { ostype & ?\|?( ostype &, Params ); } ) {
366	ostype & ?\|?( ostype & os, T arg, Params rest ) {
367	(ostype &)(os \| arg); // print first argument
368	sepSetCur$( os, sepGetTuple( os ) ); // switch to tuple separator
369	(ostype &)(os \| rest); // print remaining arguments
370	sepSetCur$( os, sepGet( os ) ); // switch to regular separator
371	return os;
372	} // ?\|?
373	void ?\|?( ostype & os, T arg, Params rest ) {
374	// (ostype &)(?\|?( os, arg, rest )); ends( os );
375	(ostype &)(os \| arg); // print first argument
376	sepSetCur$( os, sepGetTuple( os ) ); // switch to tuple separator
377	(ostype &)(os \| rest); // print remaining arguments
378	sepSetCur$( os, sepGet( os ) ); // switch to regular separator
379	ends( os );
380	} // ?\|?
381	} // distribution
382
383	// writes the range [begin, end) to the given stream
384	forall( ostype &, elt_type \| writeable( elt_type, ostype ), iterator_type \| iterator( iterator_type, elt_type ) ) {
385	void write( iterator_type begin, iterator_type end, ostype & os ) {
386	void print( elt_type i ) { os \| i; }
387	for_each( begin, end, print );
388	} // ?\|?
389
390	void write_reverse( iterator_type begin, iterator_type end, ostype & os ) {
391	void print( elt_type i ) { os \| i; }
392	for_each_reverse( begin, end, print );
393	} // ?\|?
394	} // distribution
395
396	// ********************************* manipulators *********************************
397
398	// ********************************* integral *********************************
399
400	static const char * shortbin[] = { "0", "1", "10", "11", "100", "101", "110", "111", "1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111" };
401	static const char * longbin[] = { "0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111", "1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111" };
402
403	// Default prefix for non-decimal prints is 0b, 0, 0x.
404	#define INTEGRAL_FMT_IMPL( T, IFMTNP, IFMTP ) \
405	forall( ostype & \| basic_ostream( ostype ) ) { \
406	ostype & ?\|?( ostype & os, _Ostream_Manip(T) f ) { \
407	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) ); \
408	\
409	if ( f.base == 'b' \|\| f.base == 'B' ) { /* bespoke binary format */ \
410	int bits = high1( f.val ); /* position of most significant bit */ \
411	if ( bits == 0 ) bits = 1; /* 0 value => force one bit to print */ \
412	int spaces; \
413	if ( ! f.flags.left ) { /* right justified ? */ \
414	/* Note, base prefix then zero padding or spacing then prefix. */ \
415	if ( f.flags.pc ) { \
416	spaces = f.wd - f.pc; \
417	if ( ! f.flags.nobsdp ) { spaces -= 2; } /* base prefix takes space */ \
418	if ( spaces > 0 ) fmt( os, "%s", spaces, " " ); / space pad */ \
419	if ( ! f.flags.nobsdp ) { fmt( os, "0%c", f.base ); } \
420	spaces = f.pc - bits; \
421	if ( spaces > 0 ) fmt( os, "%0d", spaces, 0 ); / zero pad */ \
422	} else { \
423	spaces = f.wd - bits; \
424	if ( ! f.flags.nobsdp ) { spaces -= 2; } /* base prefix takes space */ \
425	if ( f.flags.pad0 ) { \
426	if ( ! f.flags.nobsdp ) { fmt( os, "0%c", f.base ); } \
427	if ( spaces > 0 ) fmt( os, "%0d", spaces, 0 ); / zero pad */ \
428	} else { \
429	if ( spaces > 0 ) fmt( os, "%s", spaces, " " ); / space pad */ \
430	if ( ! f.flags.nobsdp ) { fmt( os, "0%c", f.base ); } \
431	} /* if */ \
432	} /* if */ \
433	} else { \
434	if ( ! f.flags.nobsdp ) fmt( os, "0%c", f.base ); \
435	if ( f.flags.pc ) { \
436	spaces = f.pc - bits; \
437	if ( spaces > 0 ) fmt( os, "%0d", spaces, 0 ); / zero pad */ \
438	spaces = f.wd - f.pc; \
439	} else { /* pad0 flag ignored with left flag */ \
440	spaces = f.wd - bits; \
441	} /* if */ \
442	if ( ! f.flags.nobsdp ) { spaces -= 2; } /* base prefix takes space */ \
443	} /* if */ \
444	int shift = floor( bits - 1, 4 ); \
445	typeof( f.val ) temp = f.val; \
446	fmt( os, "%s", shortbin[(temp >> shift) & 0xf] ); \
447	for () { \
448	shift -= 4; \
449	if ( shift < 0 ) break; \
450	temp = f.val; \
451	fmt( os, "%s", longbin[(temp >> shift) & 0xf] ); \
452	} /* for */ \
453	if ( f.flags.left && spaces > 0 ) fmt( os, "%*s", spaces, " " ); \
454	return os; \
455	} /* if */ \
456	\
457	char fmtstr[sizeof(IFMTP)]; /* sizeof includes '\0' */ \
458	if ( ! f.flags.pc ) memcpy( &fmtstr, IFMTNP, sizeof(IFMTNP) ); \
459	else memcpy( &fmtstr, IFMTP, sizeof(IFMTP) ); \
460	int star = 5; /* position before first '' / \
461	\
462	/* Insert flags into spaces before '', from right to left. / \
463	if ( ! f.flags.nobsdp ) { fmtstr[star] = '#'; star -= 1; } \
464	if ( f.flags.left ) { fmtstr[star] = '-'; star -= 1; } \
465	if ( f.flags.sign ) { fmtstr[star] = '+'; star -= 1; } \
466	if ( f.flags.pad0 && ! f.flags.pc ) { fmtstr[star] = '0'; star -= 1; } \
467	fmtstr[star] = '\''; star -= 1; /* locale */ \
468	fmtstr[star] = '%'; \
469	\
470	/* Special case printing 0 in hexadecimal as printf does not put the base. */ \
471	if ( (f.base == 'x' \| f.base == 'X') && ! f.flags.nobsdp && f.val == 0 ) { \
472	fmt( os, f.base == 'x' ? "0x" : "0X" ); \
473	f.wd -= 2; \
474	if ( f.wd < 0 ) f.wd = 1; \
475	} /* if */ \
476	\
477	if ( ! f.flags.pc ) { /* no precision */ \
478	fmtstr[sizeof(IFMTNP)-2] = f.base; /* sizeof includes '\0' */ \
479	/* printf( "%s %c\n", &fmtstr[star], f.base ); */ \
480	fmt( os, &fmtstr[star], f.wd, f.val ); \
481	} else { /* precision */ \
482	fmtstr[sizeof(IFMTP)-2] = f.base; /* sizeof includes '\0' */ \
483	/* printf( "%s %c\n", &fmtstr[star], f.base ); */ \
484	fmt( os, &fmtstr[star], f.wd, f.pc, f.val ); \
485	} /* if */ \
486	return os; \
487	} /* ?\|? */ \
488	OSTYPE_VOID_IMPL( _Ostream_Manip(T) ) \
489	} // distribution
490
491	INTEGRAL_FMT_IMPL( signed char, " hh ", " .*hh " )
492	INTEGRAL_FMT_IMPL( unsigned char, " hh ", " .*hh " )
493	INTEGRAL_FMT_IMPL( signed short int, " h ", " .*h " )
494	INTEGRAL_FMT_IMPL( unsigned short int, " h ", " .*h " )
495	INTEGRAL_FMT_IMPL( signed int, " * ", " . " )
496	INTEGRAL_FMT_IMPL( unsigned int, " * ", " . " )
497	INTEGRAL_FMT_IMPL( signed long int, " l ", " .*l " )
498	INTEGRAL_FMT_IMPL( unsigned long int, " l ", " .*l " )
499	INTEGRAL_FMT_IMPL( signed long long int, " ll ", " .*ll " )
500	INTEGRAL_FMT_IMPL( unsigned long long int, " ll ", " .*ll " )
501
502
503	#if defined( __SIZEOF_INT128__ )
504	// Default prefix for non-decimal prints is 0b, 0, 0x.
505	forall( ostype & \| basic_ostream( ostype ) )
506	static inline void base_128( ostype & os, unsigned int128 val, unsigned int128 power, _Ostream_Manip(uint64_t) & f, unsigned int maxdig, unsigned int bits, unsigned int cnt = 0 ) {
507	int wd = 1; // f.wd is never 0 because 0 implies left-pad
508	if ( val > power ) { // subdivide value into printable 64-bit values
509	base_128( os, val / power, power, f, maxdig, bits, cnt + 1 ); // recursive
510	f.val = val % power;
511	if ( cnt == 1 && f.flags.left ) { wd = f.wd; f.wd = maxdig; } // copy f.wd and reset for printing middle chunk
512	// printf( "R val:%#lx(%lu) wd:%u pc:%u base:%c neg:%d pc:%d left:%d nobsdp:%d sign:%d pad0:%d\n",
513	// f.val, f.val, f.wd, f.pc, f.base, f.flags.neg, f.flags.pc, f.flags.left, f.flags.nobsdp, f.flags.sign, f.flags.pad0 );
514	(ostype &)(os \| f);
515	if ( cnt == 1 ) {
516	if ( f.flags.left ) { wd -= maxdig; f.wd = wd < 0 ? 1 : wd; } // update and restore f.wd for printing end chunk
517	nosep( os ); // no seperator between chunks
518	} // if
519	} else { // print start chunk
520	f.val = val;
521	// f.pc is unsigned => use wd
522	if ( f.flags.pc && f.pc > maxdig * cnt ) { wd = f.pc - maxdig * cnt; f.pc = wd < 0 ? 0 : wd; }
523	else { f.flags.pc = false; f.pc = 0; }
524
525	if ( ! f.flags.left ) { // right justify
526	wd = f.wd - maxdig * cnt;
527	f.wd = wd < 0 ? 1 : wd;
528	wd = maxdig;
529	} else { // left justify
530	if ( cnt != 0 ) { // value >= 2^64 ?
531	unsigned int dig, bs = 0;
532	// compute size of prefix digits and base
533	if ( f.base == 'd' \|\| f.base == 'u' ) { // no base prefix
534	dig = ceil( log10( f.val ) ); // use floating-point
535	if ( f.base == 'd' && (f.flags.neg \|\| f.flags.sign) ) bs = 1; // sign ?
536	} else {
537	dig = ceiling_div( high1( f.val ), bits );
538	if ( ! f.flags.nobsdp ) { // base prefix ?
539	if ( f.base == 'o' ) {
540	// 0 prefix for octal is not added for precision with leading zero
541	if ( f.pc <= dig ) bs = 1; // 1 character prefix
542	} else bs = 2; // 2 character prefix
543	} // if
544	} // if
545	wd = f.wd - (f.pc > dig ? f.pc : dig) - bs; // precision > leading digits ?
546	if ( wd < 0 ) wd = 1;
547	f.wd = 1;
548	} // if
549	// all manipulators handled implicitly for value < 2^64
550	} // if
551	// prior checks ensure wd not negative
552
553	if ( f.flags.neg ) f.val = -f.val;
554	// printf( "L val:%#lx(%lu) wd:%u pc:%u base:%c neg:%d pc:%d left:%d nobsdp:%d sign:%d pad0:%d\n",
555	// f.val, f.val, f.wd, f.pc, f.base, f.flags.neg, f.flags.pc, f.flags.left, f.flags.nobsdp, f.flags.sign, f.flags.pad0 );
556	(ostype &)(os \| f);
557
558	// remaining middle and end chunks are padded with 0s on the left
559	if ( ! f.flags.left ) { f.flags.pad0 = true; f.flags.pc = false; } // left pad with 0s
560	else { f.pc = maxdig; f.flags.pc = true; } // left pad with precision
561
562	if ( cnt != 0 ) nosep( os ); // no seperator between chunks
563	f.wd = wd; // reset f.wd for next chunk
564	f.flags.sign = false; // no leading +/- sign
565	f.flags.nobsdp = true; // no leading base prefix
566	} // if
567	} // base_128
568
569	#define INTEGRAL_FMT_IMPL128( T ) \
570	forall( ostype & \| basic_ostream( ostype ) ) { \
571	ostype & ?\|?( ostype & os, _Ostream_Manip(T) f ) { \
572	_Ostream_Manip(uint64_t) fmt; \
573	fmt.[wd, pc, base, all] = f.[wd, pc, base, all]; \
574	if ( f.base == 'b' \| f.base == 'B' ) { \
575	base_128( os, f.val, (unsigned int128)1 << 64, fmt, 64, 1 ); \
576	} else if ( f.base == 'o' ) { \
577	base_128( os, f.val, (unsigned int128)1 << 63, fmt, 21, 3 ); \
578	} else if ( f.base == 'd' \|\| f.base == 'u' ) { \
579	if ( f.base == 'd' && f.val < 0 ) { f.val = -f.val; fmt.flags.neg = true; } \
580	base_128( os, f.val, (unsigned int128)10_000_000_000_000_000_000UL, fmt, 19, 0 ); \
581	} else { \
582	base_128( os, f.val, (unsigned int128)1 << 64, fmt, 16, 4 ); \
583	} /* if */ \
584	return os; \
585	} /* ?\|? */ \
586	OSTYPE_VOID_IMPL( _Ostream_Manip(T) ) \
587	} // distribution
588
589	INTEGRAL_FMT_IMPL128( int128 )
590	INTEGRAL_FMT_IMPL128( unsigned int128 )
591	#endif // __SIZEOF_INT128__
592
593	// ********************************* floating point *********************************
594
595	static const char *suffixes[] = {
596	"y", "z", "a", "f", "p", "n", "u", "m", "",
597	"K", "M", "G", "T", "P", "E", "Z", "Y"
598	};
599	#define SUFFIXES_START (-24) /* Smallest power for which there is a suffix defined. */
600	#define SUFFIXES_END (SUFFIXES_START + (int)((sizeof(suffixes) / sizeof(char ) - 1) 3))
601
602	#define PRINT_WITH_DP2( os, format, ... ) \
603	{ \
604	if ( ! f.flags.eng ) { \
605	len = snprintf( buf, size, format, ##__VA_ARGS__ ); \
606	if ( isfinite( f.val ) && ! f.flags.nobsdp ) { /* if number, print decimal point when no fraction or exponent */ \
607	for ( i = 0; i < len && buf[i] != '.' && buf[i] != 'e' && buf[i] != 'E' && \
608	buf[i] != 'p' && buf[i] != 'P'; i += 1 ); /* decimal point or scientific ? */ \
609	if ( i == len ) { \
610	if ( ! f.flags.left ) { \
611	buf[i] = '.'; buf[i + 1] = '\0'; \
612	if ( buf[0] == ' ' ) bufbeg = 1; /* decimal point within width */ \
613	} else { \
614	for ( i = 0; i < len && buf[i] != ' '; i += 1 ); /* trailing blank ? */ \
615	buf[i] = '.'; \
616	if ( i == len ) buf[i + 1] = '\0'; \
617	} /* if */ \
618	} /* if */ \
619	} /* if */ \
620	} else { \
621	int exp10, len2; \
622	eng( f.val, f.pc, exp10 ); /* changes arguments */ \
623	/* printf( "%g %d %d %d %s\n", f.val, f.wd, f.pc, exp10, format ); */ \
624	if ( ! f.flags.left && f.wd > 1 ) { \
625	/* Exponent size: 'e', optional minus sign, number of digits: log10(0) => undefined */ \
626	f.wd -= 1 + (exp10 < 0 ? 1 : 0) + lrint( floor( exp10 == 0 ? 0 : log10( abs( exp10 ) ) ) ) + 1; \
627	if ( f.wd < 1 ) f.wd = 1; \
628	} /* if */ \
629	len = snprintf( buf, size, format, ##__VA_ARGS__ ); \
630	if ( f.flags.left ) { \
631	for ( len -= 1; len > 0 && buf[len] == ' '; len -= 1 ); \
632	len += 1; \
633	} /* if */ \
634	if ( ! f.flags.nobsdp \|\| (exp10 < SUFFIXES_START) \|\| (exp10 > SUFFIXES_END) ) { \
635	len2 = snprintf( &buf[len], size - len, "e%d", (int)exp10 /* ambiguity with function exp10 */ ); \
636	} else { \
637	len2 = snprintf( &buf[len], size - len, "%s", suffixes[(exp10 - SUFFIXES_START) / 3] ); \
638	} /* if */ \
639	if ( f.flags.left && len + len2 < f.wd ) buf[len + len2] = ' '; \
640	} /* if */ \
641	fmt( os, "%s", &buf[bufbeg] ); \
642	}
643
644	#define FLOATING_POINT_FMT_IMPL( T, DFMTNP, DFMTP ) \
645	forall( ostype & \| basic_ostream( ostype ) ) { \
646	static void eng( T &value, int & pc, int & exp10 ) { \
647	exp10 = lrint( floor( log10( abs( value ) ) ) ); /* round to desired precision */ \
648	if ( exp10 < 0 ) exp10 -= 2; \
649	exp10 = floor( exp10, 3 ); \
650	value *= pow( 10.0, -exp10 ); \
651	if ( pc <= 3 ) pc = 3; \
652	} /* eng */ \
653	\
654	ostype & ?\|?( ostype & os, _Ostream_Manip(T) f ) { \
655	enum { size = 48 }; \
656	char buf[size]; \
657	int bufbeg = 0, i, len; \
658	\
659	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) ); \
660	char fmtstr[sizeof(DFMTP) + 8]; /* sizeof includes '\0' */ \
661	if ( ! f.flags.pc ) memcpy( &fmtstr, DFMTNP, sizeof(DFMTNP) ); \
662	else memcpy( &fmtstr, DFMTP, sizeof(DFMTP) ); \
663	int star = 5; /* position before first '' / \
664	\
665	/* Insert flags into spaces before '', from right to left. / \
666	if ( f.flags.left ) { fmtstr[star] = '-'; star -= 1; } \
667	if ( f.flags.sign ) { fmtstr[star] = '+'; star -= 1; } \
668	if ( f.flags.pad0 ) { fmtstr[star] = '0'; star -= 1; } \
669	fmtstr[star] = '\''; star -= 1; /* locale */ \
670	fmtstr[star] = '%'; \
671	\
672	if ( ! f.flags.pc ) { /* no precision */ \
673	fmtstr[sizeof(DFMTNP)-2] = f.base; /* sizeof includes '\0' */ \
674	/* printf( "%g %d %s\n", f.val, f.wd, &fmtstr[star] ); */ \
675	PRINT_WITH_DP2( os, &fmtstr[star], f.wd, f.val ) \
676	} else { /* precision */ \
677	fmtstr[sizeof(DFMTP)-2] = f.base; /* sizeof includes '\0' */ \
678	/* printf( "%g %d %d %s\n", f.val, f.wd, f.pc, &fmtstr[star] ); */ \
679	PRINT_WITH_DP2( os, &fmtstr[star], f.wd, f.pc, f.val ) \
680	} /* if */ \
681	return os; \
682	} /* ?\|? */ \
683	\
684	OSTYPE_VOID_IMPL( _Ostream_Manip(T) ) \
685	} // distribution
686
687	FLOATING_POINT_FMT_IMPL( double, " * ", " . " )
688	FLOATING_POINT_FMT_IMPL( long double, " L ", " .*L " )
689
690	// ********************************* character *********************************
691
692	forall( ostype & \| basic_ostream( ostype ) ) {
693	ostype & ?\|?( ostype & os, _Ostream_Manip(char) f ) {
694	if ( f.base != 'c' ) { // bespoke binary/octal/hex format
695	_Ostream_Manip(unsigned char) fmtuc @= { f.val, f.wd, f.pc, f.base, {'\0'} };
696	fmtuc.flags.pc = f.flags.pc;
697	fmtuc.flags.nobsdp = f.flags.nobsdp;
698	// os \| fmtuc \| nonl;
699	(ostype &)(os \| fmtuc);
700	return os;
701	} // if
702
703	if ( sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
704
705	#define CFMTNP "% * "
706	char fmtstr[sizeof(CFMTNP)]; // sizeof includes '\0'
707	memcpy( &fmtstr, CFMTNP, sizeof(CFMTNP) );
708	int star = 1; // position before first '*'
709
710	// Insert flags into spaces before '*', from right to left.
711	if ( f.flags.left ) { fmtstr[star] = '-'; star -= 1; }
712	fmtstr[star] = '%';
713
714	fmtstr[sizeof(CFMTNP)-2] = f.base; // sizeof includes '\0'
715	// printf( "%d %s\n", f.wd, &fmtstr[star] );
716	fmt( os, &fmtstr[star], f.wd, f.val );
717	return os;
718	} // ?\|?
719	OSTYPE_VOID_IMPL( _Ostream_Manip(char) )
720	} // distribution
721
722	// ********************************* C string *********************************
723
724	forall( ostype & \| basic_ostream( ostype ) ) {
725	ostype & ?\|?( ostype & os, _Ostream_Manip(const char *) f ) {
726	if ( ! f.val ) return os; // null pointer ?
727
728	if ( f.base != 's' ) { // bespoke binary/octal/hex format
729	_Ostream_Manip(unsigned char) fmtuc @= { 0, f.wd, f.pc, f.base, {'\0'} };
730	fmtuc.flags.pc = f.flags.pc;
731	fmtuc.flags.nobsdp = f.flags.nobsdp;
732	for ( i; 0 ~ @ : @; f.val[i] != '\0' ) {
733	fmtuc.val = f.val[i];
734	// os \| fmtuc \| nonl;
735	(ostype &)(os \| fmtuc);
736	} // for
737	return os;
738	} // if
739
740	if ( f.val[0] != '\0' && // null string => no leading separator
741	sepPrt$( os ) ) fmt( os, "%s", sepGetCur$( os ) );
742
743	#define SFMTNP "% * "
744	#define SFMTP "% . "
745	char fmtstr[sizeof(SFMTP)]; // sizeof includes '\0'
746	if ( ! f.flags.pc ) memcpy( &fmtstr, SFMTNP, sizeof(SFMTNP) );
747	else memcpy( &fmtstr, SFMTP, sizeof(SFMTP) );
748	int star = 1; // position before first '*'
749
750	// Insert flags into spaces before '*', from right to left.
751	if ( f.flags.left ) { fmtstr[star] = '-'; star -= 1; }
752	fmtstr[star] = '%';
753
754	if ( ! f.flags.pc ) { // no precision
755	// printf( "%d %s\n", f.wd, &fmtstr[star] );
756	fmtstr[sizeof(SFMTNP)-2] = f.base; // sizeof includes '\0'
757	fmt( os, &fmtstr[star], f.wd, f.val );
758	} else { // precision
759	fmtstr[sizeof(SFMTP)-2] = f.base; // sizeof includes '\0'
760	// printf( "%d %d %s\n", f.wd, f.pc, &fmtstr[star] );
761	fmt( os, &fmtstr[star], f.wd, f.pc, f.val );
762	} // if
763	if ( f.val[0] == '\0' ) { nosep( os ); } // null string => no trailing separator
764	return os;
765	} // ?\|?
766	OSTYPE_VOID_IMPL( _Ostream_Manip(const char *) )
767	} // distribution
768
769
770	// ********************************* istream *********************************
771
772
773	forall( istype & \| basic_istream( istype ) ) {
774	istype & ?\|?( istype & is, bool & b ) {
775	char val[6];
776	fmt( is, "%5s", val );
777	if ( strcmp( val, "true" ) == 0 ) b = true;
778	else if ( strcmp( val, "false" ) == 0 ) b = false;
779	else {
780	fprintf( stderr, "invalid Boolean constant\n" );
781	abort(); // cannot use abort stream
782	} // if
783	return is;
784	} // ?\|?
785	ISTYPE_VOID_IMPL( bool & )
786
787	istype & ?\|?( istype & is, char & c ) {
788	char temp;
789	for () {
790	fmt( is, "%c", &temp ); // must pass pointer through varg to fmt
791	// do not overwrite parameter with newline unless appropriate
792	if ( temp != '\n' \|\| getANL$( is ) ) { c = temp; break; }
793	if ( eof( is ) ) break;
794	} // for
795	return is;
796	} // ?\|?
797	ISTYPE_VOID_IMPL( char & )
798
799	istype & ?\|?( istype & is, signed char & sc ) {
800	fmt( is, "%hhi", &sc );
801	return is;
802	} // ?\|?
803	ISTYPE_VOID_IMPL( signed char & )
804
805	istype & ?\|?( istype & is, unsigned char & usc ) {
806	fmt( is, "%hhi", &usc );
807	return is;
808	} // ?\|?
809	ISTYPE_VOID_IMPL( unsigned char & )
810
811	istype & ?\|?( istype & is, short int & si ) {
812	fmt( is, "%hi", &si );
813	return is;
814	} // ?\|?
815	ISTYPE_VOID_IMPL( short int & )
816
817	istype & ?\|?( istype & is, unsigned short int & usi ) {
818	fmt( is, "%hi", &usi );
819	return is;
820	} // ?\|?
821	ISTYPE_VOID_IMPL( unsigned short int & )
822
823	istype & ?\|?( istype & is, int & i ) {
824	fmt( is, "%i", &i );
825	return is;
826	} // ?\|?
827	ISTYPE_VOID_IMPL( int & )
828
829	istype & ?\|?( istype & is, unsigned int & ui ) {
830	fmt( is, "%i", &ui );
831	return is;
832	} // ?\|?
833	ISTYPE_VOID_IMPL( unsigned int & )
834
835	istype & ?\|?( istype & is, long int & li ) {
836	fmt( is, "%li", &li );
837	return is;
838	} // ?\|?
839	ISTYPE_VOID_IMPL( long int & )
840
841	istype & ?\|?( istype & is, unsigned long int & ulli ) {
842	fmt( is, "%li", &ulli );
843	return is;
844	} // ?\|?
845	ISTYPE_VOID_IMPL( unsigned long int & )
846
847	istype & ?\|?( istype & is, long long int & lli ) {
848	fmt( is, "%lli", &lli );
849	return is;
850	} // ?\|?
851	ISTYPE_VOID_IMPL( long long int & )
852
853	istype & ?\|?( istype & is, unsigned long long int & ulli ) {
854	fmt( is, "%lli", &ulli );
855	return is;
856	} // ?\|?
857	ISTYPE_VOID_IMPL( unsigned long long int & )
858
859	#if defined( __SIZEOF_INT128__ )
860	istype & ?\|?( istype & is, int128 & llli ) {
861	return (istype &)(is \| (unsigned int128 &)llli);
862	} // ?\|?
863	ISTYPE_VOID_IMPL( int128 & )
864
865	istype & ?\|?( istype & is, unsigned int128 & ullli ) {
866	char s[40];
867	bool sign = false;
868
869	if ( fmt( is, " %[-]", s ) == 1 ) sign = true; // skip whitespace, negative sign ?
870	// If the input is too large, the value returned is undefined. If there is no input, no value is returned
871	if ( fmt( is, "%39[0-9]%*[0-9]", s ) == 1 ) { // take first 39 characters, ignore remaining
872	ullli = 0;
873	for ( i; 0 ~ @ : @; s[i] != '\0' ) {
874	ullli = ullli * 10 + s[i] - '0';
875	} // for
876	if ( sign ) ullli = -ullli;
877	} else if ( sign ) ungetc( is, '-' ); // return minus when no digits
878	return is;
879	} // ?\|?
880	ISTYPE_VOID_IMPL( unsigned int128 & )
881	#endif // __SIZEOF_INT128__
882
883	istype & ?\|?( istype & is, float & f ) {
884	fmt( is, "%f", &f );
885	return is;
886	} // ?\|?
887	ISTYPE_VOID_IMPL( float & )
888
889	istype & ?\|?( istype & is, double & d ) {
890	fmt( is, "%lf", &d );
891	return is;
892	} // ?\|?
893	ISTYPE_VOID_IMPL( double & )
894
895	istype & ?\|?( istype & is, long double & ld ) {
896	fmt( is, "%Lf", &ld );
897	return is;
898	} // ?\|?
899	ISTYPE_VOID_IMPL( long double & )
900
901	istype & ?\|?( istype & is, float _Complex & fc ) {
902	float re, im;
903	fmt( is, "%f%fi", &re, &im );
904	fc = re + im * _Complex_I;
905	return is;
906	} // ?\|?
907	ISTYPE_VOID_IMPL( float _Complex & )
908
909	istype & ?\|?( istype & is, double _Complex & dc ) {
910	double re, im;
911	fmt( is, "%lf%lfi", &re, &im );
912	dc = re + im * _Complex_I;
913	return is;
914	} // ?\|?
915	ISTYPE_VOID_IMPL( double _Complex & )
916
917	istype & ?\|?( istype & is, long double _Complex & ldc ) {
918	long double re, im;
919	fmt( is, "%Lf%Lfi", &re, &im );
920	ldc = re + im * _Complex_I;
921	return is;
922	} // ?\|?
923	ISTYPE_VOID_IMPL( long double _Complex & )
924
925	istype & ?\|?( istype & is, const char fmt[] ) {
926	fmt( is, fmt, "" );
927	return is;
928	} // ?\|?
929	ISTYPE_VOID_IMPL( const char * )
930
931	// manipulators
932	istype & ?\|?( istype & is, istype & (* manip)( istype & ) ) {
933	return manip( is );
934	} // ?\|?
935
936	void ?\|?( istype & is, istype & (* manip)( istype & ) ) {
937	manip( is ); ends( is );
938	} // ?\|?
939
940	istype & nl( istype & is ) {
941	fmt( is, "%*[^\n]" ); // ignore characters to newline
942	if ( ! eof( is ) && getANL$( is ) ) fmt( is, "%*c" ); // read newline
943	return is;
944	} // nl
945
946	istype & nlOn( istype & is ) {
947	nlOn( is ); // call void returning
948	return is;
949	} // nlOn
950
951	istype & nlOff( istype & is ) {
952	nlOff( is ); // call void returning
953	return is;
954	} // nlOff
955	} // distribution
956
957	// ********************************* manipulators *********************************
958
959	forall( istype & \| basic_istream( istype ) ) {
960	istype & ?\|?( istype & is, _Istream_Cskip f ) {
961	// printf( "skip %s %d\n", f.scanset, f.wd );
962	if ( f.scanset ) {
963	int nscanset = strlen(f.scanset);
964	char fmtstr[ sizeof("%*[]") + nscanset ];
965	int pos = 0;
966	fmtstr[pos] = '%'; pos += 1;
967	fmtstr[pos] = '*'; pos += 1;
968	fmtstr[pos] = '['; pos += 1;
969	strcpy( &fmtstr[pos], f.scanset ); pos += nscanset;
970	fmtstr[pos] = ']'; pos += 1;
971	fmtstr[pos] = '\0';
972	fmt( is, fmtstr, (void*)0 ); // last arg is dummy: suppress gcc warning
973	}
974	else for ( f.wd ) fmt( is, "%*c" );
975	return is;
976	}
977	ISTYPE_VOID_IMPL( _Istream_Cskip )
978
979	istype & ?\|?( istype & is, _Istream_Cstr f ) {
980	const char * scanset = f.scanset;
981	if ( f.flags.delimiter ) scanset = f.delimiter; // getline ?
982
983	size_t len = 0;
984	if ( scanset ) len = strlen( scanset );
985	char fmtstr[len + 16];
986	int start = 1;
987	fmtstr[0] = '%';
988	if ( f.flags.ignore ) { fmtstr[1] = '*'; start += 1; }
989	// no maximum width necessary because text ignored => width is read width
990	if ( f.wd != -1 ) {
991	// wd is buffer bytes available (for input chars + null terminator)
992	// rwd is count of input chars
993	int rwd = f.flags.rwd ? f.wd : (f.wd - 1);
994	start += sprintf( &fmtstr[start], "%d", rwd );
995	}
996
997	if ( ! scanset ) {
998	// %s, %s, %ws, %ws
999	fmtstr[start] = 's'; fmtstr[start + 1] = '\0';
1000	// printf( "cstr %s\n", fmtstr );
1001	} else {
1002	// incl %[xxx], %[xxx], %w[xxx], %w[xxx]
1003	// excl %[^xxx], %[^xxx], %w[^xxx], %w[^xxx]
1004	fmtstr[start] = '['; start += 1;
1005	if ( f.flags.inex ) { fmtstr[start] = '^'; start += 1; }
1006	strcpy( &fmtstr[start], scanset ); // copy includes '\0'
1007	len += start;
1008	fmtstr[len] = ']'; fmtstr[len + 1] = '\0';
1009	// printf( "incl/excl %s\n", fmtstr );
1010	} // if
1011
1012	int check = f.wd - 2;
1013	if (! f.flags.ignore ) {
1014	f.s[0] = '\0';
1015	if ( ! f.flags.rwd ) f.s[check] = '\0'; // insert sentinel
1016	}
1017	len = fmt( is, fmtstr, f.s );
1018	//fprintf( stderr, "KK %s %zd %d %c %s\n", fmtstr, len, check, f.s[check], f.s );
1019
1020	if (! f.flags.ignore && ! f.flags.rwd && f.s[check] != '\0' ) // sentinel overwritten ?
1021	throw (cstring_length){ &cstring_length_vt };
1022
1023	if ( f.flags.delimiter ) { // getline ?
1024	if ( len == 0 ) f.s[0] = '\0'; // empty read => argument unchanged => set empty
1025	if ( ! eof( is ) ) { // ignore delimiter, may not be present because of width
1026	char delimiter;
1027	fmt( is, "%c", &delimiter );
1028	if ( delimiter != f.delimiter[0] ) ungetc( is, delimiter );
1029	} // if
1030	} //if
1031	return is;
1032	} // ?\|?
1033	ISTYPE_VOID_IMPL( _Istream_Cstr )
1034
1035	istype & ?\|?( istype & is, _Istream_Char f ) {
1036	fmt( is, "%*c" ); // argument variable unused
1037	return is;
1038	} // ?\|?
1039	ISTYPE_VOID_IMPL( _Istream_Char )
1040	} // distribution
1041
1042	#define INPUT_FMT_IMPL( T, CODE ) \
1043	forall( istype & \| basic_istream( istype ) ) { \
1044	istype & ?\|?( istype & is, _Istream_Manip(T) f ) { \
1045	enum { size = 16 }; \
1046	char fmtstr[size]; \
1047	if ( f.wd == -1 ) { \
1048	snprintf( fmtstr, size, "%%%s%s", f.ignore ? "*" : "", CODE ); \
1049	} else { \
1050	snprintf( fmtstr, size, "%%%s%d%s", f.ignore ? "*" : "", f.wd, CODE ); \
1051	} /* if */ \
1052	/* printf( "%d %s %p\n", f.wd, fmtstr, &f.val ); */ \
1053	fmt( is, fmtstr, &f.val ); \
1054	return is; \
1055	} /* ?\|? */ \
1056	ISTYPE_VOID_IMPL( _Istream_Manip(T) ) \
1057	} // distribution
1058
1059	INPUT_FMT_IMPL( signed char, "hhi" )
1060	INPUT_FMT_IMPL( unsigned char, "hhi" )
1061	INPUT_FMT_IMPL( signed short int, "hi" )
1062	INPUT_FMT_IMPL( unsigned short int, "hi" )
1063	INPUT_FMT_IMPL( signed int, "i" )
1064	INPUT_FMT_IMPL( unsigned int, "i" )
1065	INPUT_FMT_IMPL( signed long int, "li" )
1066	INPUT_FMT_IMPL( unsigned long int, "li" )
1067	INPUT_FMT_IMPL( signed long long int, "lli" )
1068	INPUT_FMT_IMPL( unsigned long long int, "lli" )
1069
1070	INPUT_FMT_IMPL( float, "f" )
1071	INPUT_FMT_IMPL( double, "lf" )
1072	INPUT_FMT_IMPL( long double, "Lf" )
1073
1074	forall( istype & \| basic_istream( istype ) ) {
1075	istype & ?\|?( istype & is, _Istream_Manip(float _Complex) fc ) {
1076	float re, im;
1077	_Istream_Manip(float) fmtuc @= { re, fc.wd, fc.ignore };
1078	is \| fmtuc;
1079	&fmtuc.val = &im;
1080	is \| fmtuc;
1081	if ( ! fc.ignore ) fc.val = re + im * _Complex_I; // re/im are uninitialized for ignore
1082	return is;
1083	} // ?\|?
1084	ISTYPE_VOID_IMPL( _Istream_Manip(float _Complex) )
1085
1086	istype & ?\|?( istype & is, _Istream_Manip(double _Complex) dc ) {
1087	double re, im;
1088	_Istream_Manip(double) fmtuc @= { re, dc.wd, dc.ignore };
1089	is \| fmtuc;
1090	&fmtuc.val = &im;
1091	is \| fmtuc;
1092	if ( ! dc.ignore ) dc.val = re + im * _Complex_I; // re/im are uninitialized for ignore
1093	return is;
1094	} // ?\|?
1095	ISTYPE_VOID_IMPL( _Istream_Manip(double _Complex) )
1096
1097	istype & ?\|?( istype & is, _Istream_Manip(long double _Complex) ldc ) {
1098	long double re, im;
1099	_Istream_Manip(long double) fmtuc @= { re, ldc.wd, ldc.ignore };
1100	is \| fmtuc;
1101	&fmtuc.val = &im;
1102	is \| fmtuc;
1103	if ( ! ldc.ignore ) ldc.val = re + im * _Complex_I; // re/im are uninitialized for ignore
1104	return is;
1105	} // ?\|?
1106	ISTYPE_VOID_IMPL( _Istream_Manip(long double _Complex) )
1107	} // distribution
1108
1109
1110	// Local Variables: //
1111	// tab-width: 4 //
1112	// compile-command: "cfa iostream.cfa" //
1113	// End: //

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