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comparison lib/argp-fmtstream.h @ 421:3c2e1f24cc7d 3.0-beta2

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Added generated files for release
author lost@l-w.ca
date Sun, 19 Sep 2010 01:33:24 -0600
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420:7366deedfa85 421:3c2e1f24cc7d
1 /* Word-wrapping and line-truncating streams.
2 Copyright (C) 1997, 2006-2010 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Written by Miles Bader <miles@gnu.ai.mit.edu>.
5
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18
19 /* This package emulates glibc `line_wrap_stream' semantics for systems that
20 don't have that. If the system does have it, it is just a wrapper for
21 that. This header file is only used internally while compiling argp, and
22 shouldn't be installed. */
23
24 #ifndef _ARGP_FMTSTREAM_H
25 #define _ARGP_FMTSTREAM_H
26
27 #include <stdio.h>
28 #include <string.h>
29 #include <unistd.h>
30
31 #ifndef __attribute__
32 /* This feature is available in gcc versions 2.5 and later. */
33 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
34 # define __attribute__(Spec) /* empty */
35 # endif
36 /* The __-protected variants of `format' and `printf' attributes
37 are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */
38 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7) || __STRICT_ANSI__
39 # define __format__ format
40 # define __printf__ printf
41 # endif
42 #endif
43
44 #if (_LIBC - 0 && !defined (USE_IN_LIBIO)) \
45 || (defined (__GNU_LIBRARY__) && defined (HAVE_LINEWRAP_H))
46 /* line_wrap_stream is available, so use that. */
47 #define ARGP_FMTSTREAM_USE_LINEWRAP
48 #endif
49
50 #ifdef ARGP_FMTSTREAM_USE_LINEWRAP
51 /* Just be a simple wrapper for line_wrap_stream; the semantics are
52 *slightly* different, as line_wrap_stream doesn't actually make a new
53 object, it just modifies the given stream (reversibly) to do
54 line-wrapping. Since we control who uses this code, it doesn't matter. */
55
56 #include <linewrap.h>
57
58 typedef FILE *argp_fmtstream_t;
59
60 #define argp_make_fmtstream line_wrap_stream
61 #define __argp_make_fmtstream line_wrap_stream
62 #define argp_fmtstream_free line_unwrap_stream
63 #define __argp_fmtstream_free line_unwrap_stream
64
65 #define __argp_fmtstream_putc(fs,ch) putc(ch,fs)
66 #define argp_fmtstream_putc(fs,ch) putc(ch,fs)
67 #define __argp_fmtstream_puts(fs,str) fputs(str,fs)
68 #define argp_fmtstream_puts(fs,str) fputs(str,fs)
69 #define __argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs)
70 #define argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs)
71 #define __argp_fmtstream_printf fprintf
72 #define argp_fmtstream_printf fprintf
73
74 #define __argp_fmtstream_lmargin line_wrap_lmargin
75 #define argp_fmtstream_lmargin line_wrap_lmargin
76 #define __argp_fmtstream_set_lmargin line_wrap_set_lmargin
77 #define argp_fmtstream_set_lmargin line_wrap_set_lmargin
78 #define __argp_fmtstream_rmargin line_wrap_rmargin
79 #define argp_fmtstream_rmargin line_wrap_rmargin
80 #define __argp_fmtstream_set_rmargin line_wrap_set_rmargin
81 #define argp_fmtstream_set_rmargin line_wrap_set_rmargin
82 #define __argp_fmtstream_wmargin line_wrap_wmargin
83 #define argp_fmtstream_wmargin line_wrap_wmargin
84 #define __argp_fmtstream_set_wmargin line_wrap_set_wmargin
85 #define argp_fmtstream_set_wmargin line_wrap_set_wmargin
86 #define __argp_fmtstream_point line_wrap_point
87 #define argp_fmtstream_point line_wrap_point
88
89 #else /* !ARGP_FMTSTREAM_USE_LINEWRAP */
90 /* Guess we have to define our own version. */
91
92 struct argp_fmtstream
93 {
94 FILE *stream; /* The stream we're outputting to. */
95
96 size_t lmargin, rmargin; /* Left and right margins. */
97 ssize_t wmargin; /* Margin to wrap to, or -1 to truncate. */
98
99 /* Point in buffer to which we've processed for wrapping, but not output. */
100 size_t point_offs;
101 /* Output column at POINT_OFFS, or -1 meaning 0 but don't add lmargin. */
102 ssize_t point_col;
103
104 char *buf; /* Output buffer. */
105 char *p; /* Current end of text in BUF. */
106 char *end; /* Absolute end of BUF. */
107 };
108
109 typedef struct argp_fmtstream *argp_fmtstream_t;
110
111 /* Return an argp_fmtstream that outputs to STREAM, and which prefixes lines
112 written on it with LMARGIN spaces and limits them to RMARGIN columns
113 total. If WMARGIN >= 0, words that extend past RMARGIN are wrapped by
114 replacing the whitespace before them with a newline and WMARGIN spaces.
115 Otherwise, chars beyond RMARGIN are simply dropped until a newline.
116 Returns NULL if there was an error. */
117 extern argp_fmtstream_t __argp_make_fmtstream (FILE *__stream,
118 size_t __lmargin,
119 size_t __rmargin,
120 ssize_t __wmargin);
121 extern argp_fmtstream_t argp_make_fmtstream (FILE *__stream,
122 size_t __lmargin,
123 size_t __rmargin,
124 ssize_t __wmargin);
125
126 /* Flush __FS to its stream, and free it (but don't close the stream). */
127 extern void __argp_fmtstream_free (argp_fmtstream_t __fs);
128 extern void argp_fmtstream_free (argp_fmtstream_t __fs);
129
130 extern ssize_t __argp_fmtstream_printf (argp_fmtstream_t __fs,
131 const char *__fmt, ...)
132 __attribute__ ((__format__ (printf, 2, 3)));
133 extern ssize_t argp_fmtstream_printf (argp_fmtstream_t __fs,
134 const char *__fmt, ...)
135 __attribute__ ((__format__ (printf, 2, 3)));
136
137 #if _LIBC || !defined __OPTIMIZE__
138 extern int __argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch);
139 extern int argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch);
140
141 extern int __argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str);
142 extern int argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str);
143
144 extern size_t __argp_fmtstream_write (argp_fmtstream_t __fs,
145 const char *__str, size_t __len);
146 extern size_t argp_fmtstream_write (argp_fmtstream_t __fs,
147 const char *__str, size_t __len);
148 #endif
149
150 /* Access macros for various bits of state. */
151 #define argp_fmtstream_lmargin(__fs) ((__fs)->lmargin)
152 #define argp_fmtstream_rmargin(__fs) ((__fs)->rmargin)
153 #define argp_fmtstream_wmargin(__fs) ((__fs)->wmargin)
154 #define __argp_fmtstream_lmargin argp_fmtstream_lmargin
155 #define __argp_fmtstream_rmargin argp_fmtstream_rmargin
156 #define __argp_fmtstream_wmargin argp_fmtstream_wmargin
157
158 #if _LIBC || !defined __OPTIMIZE__
159 /* Set __FS's left margin to LMARGIN and return the old value. */
160 extern size_t argp_fmtstream_set_lmargin (argp_fmtstream_t __fs,
161 size_t __lmargin);
162 extern size_t __argp_fmtstream_set_lmargin (argp_fmtstream_t __fs,
163 size_t __lmargin);
164
165 /* Set __FS's right margin to __RMARGIN and return the old value. */
166 extern size_t argp_fmtstream_set_rmargin (argp_fmtstream_t __fs,
167 size_t __rmargin);
168 extern size_t __argp_fmtstream_set_rmargin (argp_fmtstream_t __fs,
169 size_t __rmargin);
170
171 /* Set __FS's wrap margin to __WMARGIN and return the old value. */
172 extern size_t argp_fmtstream_set_wmargin (argp_fmtstream_t __fs,
173 size_t __wmargin);
174 extern size_t __argp_fmtstream_set_wmargin (argp_fmtstream_t __fs,
175 size_t __wmargin);
176
177 /* Return the column number of the current output point in __FS. */
178 extern size_t argp_fmtstream_point (argp_fmtstream_t __fs);
179 extern size_t __argp_fmtstream_point (argp_fmtstream_t __fs);
180 #endif
181
182 /* Internal routines. */
183 extern void _argp_fmtstream_update (argp_fmtstream_t __fs);
184 extern void __argp_fmtstream_update (argp_fmtstream_t __fs);
185 extern int _argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
186 extern int __argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
187
188 #ifdef __OPTIMIZE__
189 /* Inline versions of above routines. */
190
191 #if !_LIBC
192 #define __argp_fmtstream_putc argp_fmtstream_putc
193 #define __argp_fmtstream_puts argp_fmtstream_puts
194 #define __argp_fmtstream_write argp_fmtstream_write
195 #define __argp_fmtstream_set_lmargin argp_fmtstream_set_lmargin
196 #define __argp_fmtstream_set_rmargin argp_fmtstream_set_rmargin
197 #define __argp_fmtstream_set_wmargin argp_fmtstream_set_wmargin
198 #define __argp_fmtstream_point argp_fmtstream_point
199 #define __argp_fmtstream_update _argp_fmtstream_update
200 #define __argp_fmtstream_ensure _argp_fmtstream_ensure
201 #endif
202
203 #ifndef ARGP_FS_EI
204 # ifdef __GNUC__
205 /* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
206 inline semantics, unless -fgnu89-inline is used. It defines a macro
207 __GNUC_STDC_INLINE__ to indicate this situation or a macro
208 __GNUC_GNU_INLINE__ to indicate the opposite situation.
209
210 GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline
211 semantics but warns, unless -fgnu89-inline is used:
212 warning: C99 inline functions are not supported; using GNU89
213 warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute
214 It defines a macro __GNUC_GNU_INLINE__ to indicate this situation.
215
216 Whereas Apple GCC 4.0.1 build 5479 without -std=c99 or -std=gnu99
217 implements the GNU C inline semantics and defines the macro
218 __GNUC_GNU_INLINE__, but it does not warn and does not support
219 __attribute__ ((__gnu_inline__)).
220
221 All in all, these are the possible combinations. For every compiler,
222 we need to choose ARGP_FS_EI so that the corresponding table cell
223 contains an "ok".
224
225 \ ARGP_FS_EI inline extern extern
226 \ inline inline
227 CC \ __attribute__
228 ((gnu_inline))
229
230 gcc 4.3.0 error ok ok
231 gcc 4.3.0 -std=gnu99 -fgnu89-inline error ok ok
232 gcc 4.3.0 -std=gnu99 ok error ok
233
234 gcc 4.2.2 error ok ok
235 gcc 4.2.2 -std=gnu99 -fgnu89-inline error ok ok
236 gcc 4.2.2 -std=gnu99 error warning ok
237
238 gcc 4.1.2 error ok warning
239 gcc 4.1.2 -std=gnu99 error ok warning
240
241 Apple gcc 4.0.1 error ok warning
242 Apple gcc 4.0.1 -std=gnu99 ok error warning
243 */
244 # if defined __GNUC_STDC_INLINE__
245 # define ARGP_FS_EI inline
246 # elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2)
247 # define ARGP_FS_EI extern inline __attribute__ ((__gnu_inline__))
248 # else
249 # define ARGP_FS_EI extern inline
250 # endif
251 # else
252 /* With other compilers, assume the ISO C99 meaning of 'inline', if
253 the compiler supports 'inline' at all. */
254 # define ARGP_FS_EI inline
255 # endif
256 #endif
257
258 ARGP_FS_EI size_t
259 __argp_fmtstream_write (argp_fmtstream_t __fs,
260 const char *__str, size_t __len)
261 {
262 if (__fs->p + __len <= __fs->end || __argp_fmtstream_ensure (__fs, __len))
263 {
264 memcpy (__fs->p, __str, __len);
265 __fs->p += __len;
266 return __len;
267 }
268 else
269 return 0;
270 }
271
272 ARGP_FS_EI int
273 __argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str)
274 {
275 size_t __len = strlen (__str);
276 if (__len)
277 {
278 size_t __wrote = __argp_fmtstream_write (__fs, __str, __len);
279 return __wrote == __len ? 0 : -1;
280 }
281 else
282 return 0;
283 }
284
285 ARGP_FS_EI int
286 __argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch)
287 {
288 if (__fs->p < __fs->end || __argp_fmtstream_ensure (__fs, 1))
289 return *__fs->p++ = __ch;
290 else
291 return EOF;
292 }
293
294 /* Set __FS's left margin to __LMARGIN and return the old value. */
295 ARGP_FS_EI size_t
296 __argp_fmtstream_set_lmargin (argp_fmtstream_t __fs, size_t __lmargin)
297 {
298 size_t __old;
299 if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
300 __argp_fmtstream_update (__fs);
301 __old = __fs->lmargin;
302 __fs->lmargin = __lmargin;
303 return __old;
304 }
305
306 /* Set __FS's right margin to __RMARGIN and return the old value. */
307 ARGP_FS_EI size_t
308 __argp_fmtstream_set_rmargin (argp_fmtstream_t __fs, size_t __rmargin)
309 {
310 size_t __old;
311 if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
312 __argp_fmtstream_update (__fs);
313 __old = __fs->rmargin;
314 __fs->rmargin = __rmargin;
315 return __old;
316 }
317
318 /* Set FS's wrap margin to __WMARGIN and return the old value. */
319 ARGP_FS_EI size_t
320 __argp_fmtstream_set_wmargin (argp_fmtstream_t __fs, size_t __wmargin)
321 {
322 size_t __old;
323 if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
324 __argp_fmtstream_update (__fs);
325 __old = __fs->wmargin;
326 __fs->wmargin = __wmargin;
327 return __old;
328 }
329
330 /* Return the column number of the current output point in __FS. */
331 ARGP_FS_EI size_t
332 __argp_fmtstream_point (argp_fmtstream_t __fs)
333 {
334 if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
335 __argp_fmtstream_update (__fs);
336 return __fs->point_col >= 0 ? __fs->point_col : 0;
337 }
338
339 #if !_LIBC
340 #undef __argp_fmtstream_putc
341 #undef __argp_fmtstream_puts
342 #undef __argp_fmtstream_write
343 #undef __argp_fmtstream_set_lmargin
344 #undef __argp_fmtstream_set_rmargin
345 #undef __argp_fmtstream_set_wmargin
346 #undef __argp_fmtstream_point
347 #undef __argp_fmtstream_update
348 #undef __argp_fmtstream_ensure
349 #endif
350
351 #endif /* __OPTIMIZE__ */
352
353 #endif /* ARGP_FMTSTREAM_USE_LINEWRAP */
354
355 #endif /* argp-fmtstream.h */