xref: /illumos-gate/usr/src/lib/libc/inc/xpg6.h (revision 1da57d55)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef _XPG6_H
28 #define	_XPG6_H
29 
30 /*
31  * This is an OS/Net Consolidation PRIVATE header.
32  */
33 
34 /*
35  * __xpg6 (C99/SUSv3) was first introduced in Solaris 10.
36  *
37  * C99/SUSv3 behavior control bits for __xpg6 variable defined
38  * in port/gen/xpg6.c.
39  * Use these with extreme care.
40  *
41  * Please follow these basic rules for using these bits and
42  * don't convolute their meaning.
43  *
44  * The basic idea here is the upper 16 bits (default_off)
45  * enable/disable existing Solaris behaviors that conflict with
46  * the C99 or SUSv3 standards.  When these bits are on you
47  * are restoring an existing Solaris behavior and no longer
48  * in strict C99/SUSv3 conformance mode.
49  *
50  * The lower 16 bits (default_on) are C99/SUSv3 behaviors
51  * which are strictly conforming behaviors as far as the
52  * C99/SUSv3 standards are concerned.  When these bits are on
53  * you are in C99/SUSv3 conforming mode.  When these bits are off
54  * you have turned off C99/SUSv3 conforming mode and are using
55  * previous Solaris behavior.
56  *
57  * _C99SUSv3_mode_ON and _C99SUSv3_mode_OFF are two meta-definitions
58  * which are the most likely modes to run Solaris in.
59  * However, this frame work allows for other possible behaviors.
60  *
61  * The default mode of libc is _C99SUSv3_mode_OFF.
62  * A C99/SUSv3 conforming application should be compiled
63  * with the XPG6 standards conforming C compiler utility (c99) which
64  * adds an object file that contains an alternate definition
65  * for __xpg6 (_C99SUSv3_mode_ON) thus enabling C99/SUSv3 standards
66  * conforming mode.
67  */
68 
69 #define	_C99SUSv3_default_off_reserved15	0x80000000
70 #define	_C99SUSv3_default_off_reserved14	0x40000000
71 #define	_C99SUSv3_default_off_reserved13	0x20000000
72 #define	_C99SUSv3_default_off_reserved12	0x10000000
73 #define	_C99SUSv3_default_off_reserved11	0x08000000
74 #define	_C99SUSv3_default_off_reserved10	0x04000000
75 #define	_C99SUSv3_default_off_reserved09	0x02000000
76 #define	_C99SUSv3_default_off_reserved08	0x01000000
77 #define	_C99SUSv3_default_off_reserved07	0x00800000
78 #define	_C99SUSv3_default_off_reserved06	0x00400000
79 #define	_C99SUSv3_default_off_reserved05	0x00200000
80 #define	_C99SUSv3_default_off_reserved04	0x00100000
81 #define	_C99SUSv3_default_off_reserved03	0x00080000
82 #define	_C99SUSv3_default_off_reserved02	0x00040000
83 #define	_C99SUSv3_default_off_reserved01	0x00020000
84 /*
85  * If set then %f & %F print Inf/NaN;
86  *	  else print inf/nan & INF/NAN, respectively.
87  */
88 #define	_C99SUSv3_mixed_case_Inf_and_NaN	0x00010000
89 
90 #define	_C99SUSv3_default_on_reserved15		0x00008000
91 #define	_C99SUSv3_default_on_reserved14		0x00004000
92 #define	_C99SUSv3_default_on_reserved13		0x00002000
93 #define	_C99SUSv3_default_on_reserved12		0x00001000
94 #define	_C99SUSv3_default_on_reserved11		0x00000800
95 /*
96  * If set, math library entry points present in SUSv2 deal with exceptional
97  * cases as per SUSv3 spec where math_errhandling is set to MATH_ERREXCEPT;
98  * otherwise they behave as per SUSv2 spec.
99  */
100 #define	_C99SUSv3_math_errexcept		0x00000400
101 /*
102  * If set, when filename is a null pointer, freopen(NULL, mode, ...) will
103  * attempt to change the mode of the stream to that specified by mode, as if
104  * the name of the file currently associated with the stream had been used;
105  * otherwise freopen(NULL, ...) will fail.
106  */
107 #define	_C99SUSv3_freopen_NULL_filename		0x00000200
108 /*
109  * If set,
110  *	- strfmon() uses int_* members for %i
111  *	- strfmon() handles the case n_sep_by_space == 2 as SUSv3 expects,
112  *	which is different from it does in non SUSv3 mode.
113  */
114 #define	_C99SUSv3_strfmon			0x00000100
115 /*
116  * If set, pow(+/-1,+/-Inf) & pow(1,NaN) return 1; otherwise NaN is returned.
117  * Analogous comment applies to powf and powl.
118  */
119 #define	_C99SUSv3_pow_treats_Inf_as_an_even_int	0x00000080
120 /*
121  * If set, logb(subnormal) returns (double) ilogb(subnormal); otherwise
122  * logb(subnormal) returns logb(DBL_MIN).  Analogous comment applies to
123  * logbf and logbl.
124  */
125 #define	_C99SUSv3_logb_subnormal_is_like_ilogb	0x00000040
126 /*
127  * If set, ilogb(0/+Inf/-Inf/NaN) raises FE_INVALID as per SUSv3; otherwise
128  * no exception is raised.  Analogous comment applies to ilogbf and ilogbl.
129  */
130 #define	_C99SUSv3_ilogb_0InfNaN_raises_invalid	0x00000020
131 /*
132  * If set, the range for strptime() and getdate() %S specifier is [0-60]
133  * seconds; otherwise the range is [0-61] seconds.
134  */
135 #define	_C99SUSv3_strptime_seconds		0x00000010
136 
137 #define	_C99SUSv3_default_on_reserved03		0x00000008
138 
139 /*
140  * Use SUSv3 version numbers for _SC_VERSION and _SC_XOPEN_XCU_VERSION.
141  */
142 #define	_C99SUSv3_XPG6_sysconf_version		0x00000004
143 /*
144  * Include /usr/xpg6/bin in PATH.
145  */
146 #define	_C99SUSv3_XPG6_pathing			0x00000002
147 /*
148  * If set strtod() and wcstod() recognize hex floating point constants.
149  */
150 #define	_C99SUSv3_recognize_hexfp		0x00000001
151 
152 /*
153  * __xpg6 = _C99SUSv3_mode_ON   enables C99/SUSv3 standards conformance mode.
154  * __xpg6 = _C99SUSv3_mode_OFF disables C99/SUSv3 standards conformance mode.
155  */
156 
157 #define	_C99SUSv3_mode_ON	0x0000FFFF
158 #define	_C99SUSv3_mode_OFF	0xFFFF0000
159 
160 #if !defined(_ASM)
161 extern unsigned int __xpg6;
162 #endif
163 
164 #endif /* _XPG6_H */
165