source: grub-pc/trunk/fuentes/grub-core/gnulib/argp-fmtstream.h @ 22

Last change on this file since 22 was 22, checked in by mabarracus, 4 years ago

updated version and apply net.ifnames=0 into debian/rules

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Line 
1/* Word-wrapping and line-truncating streams.
2   Copyright (C) 1997, 2006-2013 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/* The __attribute__ feature is available in gcc versions 2.5 and later.
32   The __-protected variants of the attributes 'format' and 'printf' are
33   accepted by gcc versions 2.6.4 (effectively 2.7) and later.
34   We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because
35   gnulib and libintl do '#define printf __printf__' when they override
36   the 'printf' function.  */
37#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
38# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
39#else
40# define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
41#endif
42
43#if    (_LIBC - 0 && !defined (USE_IN_LIBIO)) \
44    || (defined (__GNU_LIBRARY__) && defined (HAVE_LINEWRAP_H))
45/* line_wrap_stream is available, so use that.  */
46#define ARGP_FMTSTREAM_USE_LINEWRAP
47#endif
48
49#ifdef ARGP_FMTSTREAM_USE_LINEWRAP
50/* Just be a simple wrapper for line_wrap_stream; the semantics are
51   *slightly* different, as line_wrap_stream doesn't actually make a new
52   object, it just modifies the given stream (reversibly) to do
53   line-wrapping.  Since we control who uses this code, it doesn't matter.  */
54
55#include <linewrap.h>
56
57typedef FILE *argp_fmtstream_t;
58
59#define argp_make_fmtstream line_wrap_stream
60#define __argp_make_fmtstream line_wrap_stream
61#define argp_fmtstream_free line_unwrap_stream
62#define __argp_fmtstream_free line_unwrap_stream
63
64#define __argp_fmtstream_putc(fs,ch) putc(ch,fs)
65#define argp_fmtstream_putc(fs,ch) putc(ch,fs)
66#define __argp_fmtstream_puts(fs,str) fputs(str,fs)
67#define argp_fmtstream_puts(fs,str) fputs(str,fs)
68#define __argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs)
69#define argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs)
70#define __argp_fmtstream_printf fprintf
71#define argp_fmtstream_printf fprintf
72
73#define __argp_fmtstream_lmargin line_wrap_lmargin
74#define argp_fmtstream_lmargin line_wrap_lmargin
75#define __argp_fmtstream_set_lmargin line_wrap_set_lmargin
76#define argp_fmtstream_set_lmargin line_wrap_set_lmargin
77#define __argp_fmtstream_rmargin line_wrap_rmargin
78#define argp_fmtstream_rmargin line_wrap_rmargin
79#define __argp_fmtstream_set_rmargin line_wrap_set_rmargin
80#define argp_fmtstream_set_rmargin line_wrap_set_rmargin
81#define __argp_fmtstream_wmargin line_wrap_wmargin
82#define argp_fmtstream_wmargin line_wrap_wmargin
83#define __argp_fmtstream_set_wmargin line_wrap_set_wmargin
84#define argp_fmtstream_set_wmargin line_wrap_set_wmargin
85#define __argp_fmtstream_point line_wrap_point
86#define argp_fmtstream_point line_wrap_point
87
88#else /* !ARGP_FMTSTREAM_USE_LINEWRAP */
89/* Guess we have to define our own version.  */
90
91struct argp_fmtstream
92{
93  FILE *stream;                 /* The stream we're outputting to.  */
94
95  size_t lmargin, rmargin;      /* Left and right margins.  */
96  ssize_t wmargin;              /* Margin to wrap to, or -1 to truncate.  */
97
98  /* Point in buffer to which we've processed for wrapping, but not output.  */
99  size_t point_offs;
100  /* Output column at POINT_OFFS, or -1 meaning 0 but don't add lmargin.  */
101  ssize_t point_col;
102
103  char *buf;                    /* Output buffer.  */
104  char *p;                      /* Current end of text in BUF. */
105  char *end;                    /* Absolute end of BUF.  */
106};
107
108typedef struct argp_fmtstream *argp_fmtstream_t;
109
110/* Return an argp_fmtstream that outputs to STREAM, and which prefixes lines
111   written on it with LMARGIN spaces and limits them to RMARGIN columns
112   total.  If WMARGIN >= 0, words that extend past RMARGIN are wrapped by
113   replacing the whitespace before them with a newline and WMARGIN spaces.
114   Otherwise, chars beyond RMARGIN are simply dropped until a newline.
115   Returns NULL if there was an error.  */
116extern argp_fmtstream_t __argp_make_fmtstream (FILE *__stream,
117                                               size_t __lmargin,
118                                               size_t __rmargin,
119                                               ssize_t __wmargin);
120extern argp_fmtstream_t argp_make_fmtstream (FILE *__stream,
121                                             size_t __lmargin,
122                                             size_t __rmargin,
123                                             ssize_t __wmargin);
124
125/* Flush __FS to its stream, and free it (but don't close the stream).  */
126extern void __argp_fmtstream_free (argp_fmtstream_t __fs);
127extern void argp_fmtstream_free (argp_fmtstream_t __fs);
128
129extern ssize_t __argp_fmtstream_printf (argp_fmtstream_t __fs,
130                                        const char *__fmt, ...)
131     _GL_ATTRIBUTE_FORMAT ((printf, 2, 3));
132extern ssize_t argp_fmtstream_printf (argp_fmtstream_t __fs,
133                                      const char *__fmt, ...)
134     _GL_ATTRIBUTE_FORMAT ((printf, 2, 3));
135
136#if _LIBC
137extern int __argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch);
138extern int argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch);
139
140extern int __argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str);
141extern int argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str);
142
143extern size_t __argp_fmtstream_write (argp_fmtstream_t __fs,
144                                      const char *__str, size_t __len);
145extern size_t argp_fmtstream_write (argp_fmtstream_t __fs,
146                                    const char *__str, size_t __len);
147#endif
148
149/* Access macros for various bits of state.  */
150#define argp_fmtstream_lmargin(__fs) ((__fs)->lmargin)
151#define argp_fmtstream_rmargin(__fs) ((__fs)->rmargin)
152#define argp_fmtstream_wmargin(__fs) ((__fs)->wmargin)
153#define __argp_fmtstream_lmargin argp_fmtstream_lmargin
154#define __argp_fmtstream_rmargin argp_fmtstream_rmargin
155#define __argp_fmtstream_wmargin argp_fmtstream_wmargin
156
157#if _LIBC
158/* Set __FS's left margin to LMARGIN and return the old value.  */
159extern size_t argp_fmtstream_set_lmargin (argp_fmtstream_t __fs,
160                                          size_t __lmargin);
161extern size_t __argp_fmtstream_set_lmargin (argp_fmtstream_t __fs,
162                                            size_t __lmargin);
163
164/* Set __FS's right margin to __RMARGIN and return the old value.  */
165extern size_t argp_fmtstream_set_rmargin (argp_fmtstream_t __fs,
166                                          size_t __rmargin);
167extern size_t __argp_fmtstream_set_rmargin (argp_fmtstream_t __fs,
168                                            size_t __rmargin);
169
170/* Set __FS's wrap margin to __WMARGIN and return the old value.  */
171extern size_t argp_fmtstream_set_wmargin (argp_fmtstream_t __fs,
172                                          size_t __wmargin);
173extern size_t __argp_fmtstream_set_wmargin (argp_fmtstream_t __fs,
174                                            size_t __wmargin);
175
176/* Return the column number of the current output point in __FS.  */
177extern size_t argp_fmtstream_point (argp_fmtstream_t __fs);
178extern size_t __argp_fmtstream_point (argp_fmtstream_t __fs);
179#endif
180
181/* Internal routines.  */
182extern void _argp_fmtstream_update (argp_fmtstream_t __fs);
183extern void __argp_fmtstream_update (argp_fmtstream_t __fs);
184extern int _argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
185extern int __argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
186
187#if !_LIBC || defined __OPTIMIZE__
188/* Inline versions of above routines.  */
189
190#if !_LIBC
191#define __argp_fmtstream_putc argp_fmtstream_putc
192#define __argp_fmtstream_puts argp_fmtstream_puts
193#define __argp_fmtstream_write argp_fmtstream_write
194#define __argp_fmtstream_set_lmargin argp_fmtstream_set_lmargin
195#define __argp_fmtstream_set_rmargin argp_fmtstream_set_rmargin
196#define __argp_fmtstream_set_wmargin argp_fmtstream_set_wmargin
197#define __argp_fmtstream_point argp_fmtstream_point
198#define __argp_fmtstream_update _argp_fmtstream_update
199#define __argp_fmtstream_ensure _argp_fmtstream_ensure
200_GL_INLINE_HEADER_BEGIN
201#ifndef ARGP_FS_EI
202# define ARGP_FS_EI _GL_INLINE
203#endif
204#endif
205
206#ifndef ARGP_FS_EI
207# ifdef __GNUC__
208   /* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
209      inline semantics, unless -fgnu89-inline is used.  It defines a macro
210      __GNUC_STDC_INLINE__ to indicate this situation or a macro
211      __GNUC_GNU_INLINE__ to indicate the opposite situation.
212
213      GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline
214      semantics but warns, unless -fgnu89-inline is used:
215        warning: C99 inline functions are not supported; using GNU89
216        warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute
217      It defines a macro __GNUC_GNU_INLINE__ to indicate this situation.
218
219      Whereas Apple GCC 4.0.1 build 5479 without -std=c99 or -std=gnu99
220      implements the GNU C inline semantics and defines the macro
221      __GNUC_GNU_INLINE__, but it does not warn and does not support
222      __attribute__ ((__gnu_inline__)).
223
224      All in all, these are the possible combinations.  For every compiler,
225      we need to choose ARGP_FS_EI so that the corresponding table cell
226      contains an "ok".
227
228        \    ARGP_FS_EI                      inline   extern    extern
229          \                                           inline    inline
230      CC    \                                                   __attribute__
231                                                                ((gnu_inline))
232
233      gcc 4.3.0                              error    ok        ok
234      gcc 4.3.0 -std=gnu99 -fgnu89-inline    error    ok        ok
235      gcc 4.3.0 -std=gnu99                   ok       error     ok
236
237      gcc 4.2.2                              error    ok        ok
238      gcc 4.2.2 -std=gnu99 -fgnu89-inline    error    ok        ok
239      gcc 4.2.2 -std=gnu99                   error    warning   ok
240
241      gcc 4.1.2                              error    ok        warning
242      gcc 4.1.2 -std=gnu99                   error    ok        warning
243
244      Apple gcc 4.0.1                        error    ok        warning
245      Apple gcc 4.0.1 -std=gnu99             ok       error     warning
246    */
247#  if defined __GNUC_STDC_INLINE__
248#   define ARGP_FS_EI inline
249#  elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2)
250#   define ARGP_FS_EI extern inline __attribute__ ((__gnu_inline__))
251#  else
252#   define ARGP_FS_EI extern inline
253#  endif
254# else
255   /* With other compilers, assume the ISO C99 meaning of 'inline', if
256      the compiler supports 'inline' at all.  */
257#  define ARGP_FS_EI inline
258# endif
259#endif
260
261ARGP_FS_EI size_t
262__argp_fmtstream_write (argp_fmtstream_t __fs,
263                        const char *__str, size_t __len)
264{
265  if (__fs->p + __len <= __fs->end || __argp_fmtstream_ensure (__fs, __len))
266    {
267      memcpy (__fs->p, __str, __len);
268      __fs->p += __len;
269      return __len;
270    }
271  else
272    return 0;
273}
274
275ARGP_FS_EI int
276__argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str)
277{
278  size_t __len = strlen (__str);
279  if (__len)
280    {
281      size_t __wrote = __argp_fmtstream_write (__fs, __str, __len);
282      return __wrote == __len ? 0 : -1;
283    }
284  else
285    return 0;
286}
287
288ARGP_FS_EI int
289__argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch)
290{
291  if (__fs->p < __fs->end || __argp_fmtstream_ensure (__fs, 1))
292    return *__fs->p++ = __ch;
293  else
294    return EOF;
295}
296
297/* Set __FS's left margin to __LMARGIN and return the old value.  */
298ARGP_FS_EI size_t
299__argp_fmtstream_set_lmargin (argp_fmtstream_t __fs, size_t __lmargin)
300{
301  size_t __old;
302  if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
303    __argp_fmtstream_update (__fs);
304  __old = __fs->lmargin;
305  __fs->lmargin = __lmargin;
306  return __old;
307}
308
309/* Set __FS's right margin to __RMARGIN and return the old value.  */
310ARGP_FS_EI size_t
311__argp_fmtstream_set_rmargin (argp_fmtstream_t __fs, size_t __rmargin)
312{
313  size_t __old;
314  if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
315    __argp_fmtstream_update (__fs);
316  __old = __fs->rmargin;
317  __fs->rmargin = __rmargin;
318  return __old;
319}
320
321/* Set FS's wrap margin to __WMARGIN and return the old value.  */
322ARGP_FS_EI size_t
323__argp_fmtstream_set_wmargin (argp_fmtstream_t __fs, size_t __wmargin)
324{
325  size_t __old;
326  if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
327    __argp_fmtstream_update (__fs);
328  __old = __fs->wmargin;
329  __fs->wmargin = __wmargin;
330  return __old;
331}
332
333/* Return the column number of the current output point in __FS.  */
334ARGP_FS_EI size_t
335__argp_fmtstream_point (argp_fmtstream_t __fs)
336{
337  if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
338    __argp_fmtstream_update (__fs);
339  return __fs->point_col >= 0 ? __fs->point_col : 0;
340}
341
342#if !_LIBC
343#undef __argp_fmtstream_putc
344#undef __argp_fmtstream_puts
345#undef __argp_fmtstream_write
346#undef __argp_fmtstream_set_lmargin
347#undef __argp_fmtstream_set_rmargin
348#undef __argp_fmtstream_set_wmargin
349#undef __argp_fmtstream_point
350#undef __argp_fmtstream_update
351#undef __argp_fmtstream_ensure
352_GL_INLINE_HEADER_END
353#endif
354
355#endif /* !_LIBC || __OPTIMIZE__ */
356
357#endif /* ARGP_FMTSTREAM_USE_LINEWRAP */
358
359#endif /* argp-fmtstream.h */
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