u-tools/apps/tar/gnu/argp-fmtstream.h

   1 /* -*- buffer-read-only: t -*- vi: set ro: */
   2 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
   3 /* Word-wrapping and line-truncating streams.
   4    Copyright (C) 1997, 2006-2011 Free Software Foundation, Inc.
   5    This file is part of the GNU C Library.
   6    Written by Miles Bader <miles@gnu.ai.mit.edu>.
   7
   8    This program is free software: you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 /* This package emulates glibc `line_wrap_stream' semantics for systems that
  22    don't have that.  If the system does have it, it is just a wrapper for
  23    that.  This header file is only used internally while compiling argp, and
  24    shouldn't be installed.  */
  25
  26 #ifndef _ARGP_FMTSTREAM_H
  27 #define _ARGP_FMTSTREAM_H
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <unistd.h>
  32
  33 /* The __attribute__ feature is available in gcc versions 2.5 and later.
  34    The __-protected variants of the attributes 'format' and 'printf' are
  35    accepted by gcc versions 2.6.4 (effectively 2.7) and later.
  36    We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because
  37    gnulib and libintl do '#define printf __printf__' when they override
  38    the 'printf' function.  */
  39 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
  40 # define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
  41 #else
  42 # define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
  43 #endif
  44
  45 #if    (_LIBC - 0 && !defined (USE_IN_LIBIO)) \
  46     || (defined (__GNU_LIBRARY__) && defined (HAVE_LINEWRAP_H))
  47 /* line_wrap_stream is available, so use that.  */
  48 #define ARGP_FMTSTREAM_USE_LINEWRAP
  49 #endif
  50
  51 #ifdef ARGP_FMTSTREAM_USE_LINEWRAP
  52 /* Just be a simple wrapper for line_wrap_stream; the semantics are
  53    *slightly* different, as line_wrap_stream doesn't actually make a new
  54    object, it just modifies the given stream (reversibly) to do
  55    line-wrapping.  Since we control who uses this code, it doesn't matter.  */
  56
  57 #include <linewrap.h>
  58
  59 typedef FILE *argp_fmtstream_t;
  60
  61 #define argp_make_fmtstream line_wrap_stream
  62 #define __argp_make_fmtstream line_wrap_stream
  63 #define argp_fmtstream_free line_unwrap_stream
  64 #define __argp_fmtstream_free line_unwrap_stream
  65
  66 #define __argp_fmtstream_putc(fs,ch) putc(ch,fs)
  67 #define argp_fmtstream_putc(fs,ch) putc(ch,fs)
  68 #define __argp_fmtstream_puts(fs,str) fputs(str,fs)
  69 #define argp_fmtstream_puts(fs,str) fputs(str,fs)
  70 #define __argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs)
  71 #define argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs)
  72 #define __argp_fmtstream_printf fprintf
  73 #define argp_fmtstream_printf fprintf
  74
  75 #define __argp_fmtstream_lmargin line_wrap_lmargin
  76 #define argp_fmtstream_lmargin line_wrap_lmargin
  77 #define __argp_fmtstream_set_lmargin line_wrap_set_lmargin
  78 #define argp_fmtstream_set_lmargin line_wrap_set_lmargin
  79 #define __argp_fmtstream_rmargin line_wrap_rmargin
  80 #define argp_fmtstream_rmargin line_wrap_rmargin
  81 #define __argp_fmtstream_set_rmargin line_wrap_set_rmargin
  82 #define argp_fmtstream_set_rmargin line_wrap_set_rmargin
  83 #define __argp_fmtstream_wmargin line_wrap_wmargin
  84 #define argp_fmtstream_wmargin line_wrap_wmargin
  85 #define __argp_fmtstream_set_wmargin line_wrap_set_wmargin
  86 #define argp_fmtstream_set_wmargin line_wrap_set_wmargin
  87 #define __argp_fmtstream_point line_wrap_point
  88 #define argp_fmtstream_point line_wrap_point
  89
  90 #else /* !ARGP_FMTSTREAM_USE_LINEWRAP */
  91 /* Guess we have to define our own version.  */
  92 \f
  93 struct argp_fmtstream
  94 {
  95   FILE *stream;                 /* The stream we're outputting to.  */
  96
  97   size_t lmargin, rmargin;      /* Left and right margins.  */
  98   ssize_t wmargin;              /* Margin to wrap to, or -1 to truncate.  */
  99
 100   /* Point in buffer to which we've processed for wrapping, but not output.  */
 101   size_t point_offs;
 102   /* Output column at POINT_OFFS, or -1 meaning 0 but don't add lmargin.  */
 103   ssize_t point_col;
 104
 105   char *buf;                    /* Output buffer.  */
 106   char *p;                      /* Current end of text in BUF. */
 107   char *end;                    /* Absolute end of BUF.  */
 108 };
 109
 110 typedef struct argp_fmtstream *argp_fmtstream_t;
 111
 112 /* Return an argp_fmtstream that outputs to STREAM, and which prefixes lines
 113    written on it with LMARGIN spaces and limits them to RMARGIN columns
 114    total.  If WMARGIN >= 0, words that extend past RMARGIN are wrapped by
 115    replacing the whitespace before them with a newline and WMARGIN spaces.
 116    Otherwise, chars beyond RMARGIN are simply dropped until a newline.
 117    Returns NULL if there was an error.  */
 118 extern argp_fmtstream_t __argp_make_fmtstream (FILE *__stream,
 119                                                size_t __lmargin,
 120                                                size_t __rmargin,
 121                                                ssize_t __wmargin);
 122 extern argp_fmtstream_t argp_make_fmtstream (FILE *__stream,
 123                                              size_t __lmargin,
 124                                              size_t __rmargin,
 125                                              ssize_t __wmargin);
 126
 127 /* Flush __FS to its stream, and free it (but don't close the stream).  */
 128 extern void __argp_fmtstream_free (argp_fmtstream_t __fs);
 129 extern void argp_fmtstream_free (argp_fmtstream_t __fs);
 130
 131 extern ssize_t __argp_fmtstream_printf (argp_fmtstream_t __fs,
 132                                         const char *__fmt, ...)
 133      _GL_ATTRIBUTE_FORMAT ((printf, 2, 3));
 134 extern ssize_t argp_fmtstream_printf (argp_fmtstream_t __fs,
 135                                       const char *__fmt, ...)
 136      _GL_ATTRIBUTE_FORMAT ((printf, 2, 3));
 137
 138 #if _LIBC || !defined __OPTIMIZE__
 139 extern int __argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch);
 140 extern int argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch);
 141
 142 extern int __argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str);
 143 extern int argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str);
 144
 145 extern size_t __argp_fmtstream_write (argp_fmtstream_t __fs,
 146                                       const char *__str, size_t __len);
 147 extern size_t argp_fmtstream_write (argp_fmtstream_t __fs,
 148                                     const char *__str, size_t __len);
 149 #endif
 150 \f
 151 /* Access macros for various bits of state.  */
 152 #define argp_fmtstream_lmargin(__fs) ((__fs)->lmargin)
 153 #define argp_fmtstream_rmargin(__fs) ((__fs)->rmargin)
 154 #define argp_fmtstream_wmargin(__fs) ((__fs)->wmargin)
 155 #define __argp_fmtstream_lmargin argp_fmtstream_lmargin
 156 #define __argp_fmtstream_rmargin argp_fmtstream_rmargin
 157 #define __argp_fmtstream_wmargin argp_fmtstream_wmargin
 158
 159 #if _LIBC || !defined __OPTIMIZE__
 160 /* Set __FS's left margin to LMARGIN and return the old value.  */
 161 extern size_t argp_fmtstream_set_lmargin (argp_fmtstream_t __fs,
 162                                           size_t __lmargin);
 163 extern size_t __argp_fmtstream_set_lmargin (argp_fmtstream_t __fs,
 164                                             size_t __lmargin);
 165
 166 /* Set __FS's right margin to __RMARGIN and return the old value.  */
 167 extern size_t argp_fmtstream_set_rmargin (argp_fmtstream_t __fs,
 168                                           size_t __rmargin);
 169 extern size_t __argp_fmtstream_set_rmargin (argp_fmtstream_t __fs,
 170                                             size_t __rmargin);
 171
 172 /* Set __FS's wrap margin to __WMARGIN and return the old value.  */
 173 extern size_t argp_fmtstream_set_wmargin (argp_fmtstream_t __fs,
 174                                           size_t __wmargin);
 175 extern size_t __argp_fmtstream_set_wmargin (argp_fmtstream_t __fs,
 176                                             size_t __wmargin);
 177
 178 /* Return the column number of the current output point in __FS.  */
 179 extern size_t argp_fmtstream_point (argp_fmtstream_t __fs);
 180 extern size_t __argp_fmtstream_point (argp_fmtstream_t __fs);
 181 #endif
 182
 183 /* Internal routines.  */
 184 extern void _argp_fmtstream_update (argp_fmtstream_t __fs);
 185 extern void __argp_fmtstream_update (argp_fmtstream_t __fs);
 186 extern int _argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
 187 extern int __argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
 188 \f
 189 #ifdef __OPTIMIZE__
 190 /* Inline versions of above routines.  */
 191
 192 #if !_LIBC
 193 #define __argp_fmtstream_putc argp_fmtstream_putc
 194 #define __argp_fmtstream_puts argp_fmtstream_puts
 195 #define __argp_fmtstream_write argp_fmtstream_write
 196 #define __argp_fmtstream_set_lmargin argp_fmtstream_set_lmargin
 197 #define __argp_fmtstream_set_rmargin argp_fmtstream_set_rmargin
 198 #define __argp_fmtstream_set_wmargin argp_fmtstream_set_wmargin
 199 #define __argp_fmtstream_point argp_fmtstream_point
 200 #define __argp_fmtstream_update _argp_fmtstream_update
 201 #define __argp_fmtstream_ensure _argp_fmtstream_ensure
 202 #endif
 203
 204 #ifndef ARGP_FS_EI
 205 # ifdef __GNUC__
 206    /* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
 207       inline semantics, unless -fgnu89-inline is used.  It defines a macro
 208       __GNUC_STDC_INLINE__ to indicate this situation or a macro
 209       __GNUC_GNU_INLINE__ to indicate the opposite situation.
 210
 211       GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline
 212       semantics but warns, unless -fgnu89-inline is used:
 213         warning: C99 inline functions are not supported; using GNU89
 214         warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute
 215       It defines a macro __GNUC_GNU_INLINE__ to indicate this situation.
 216
 217       Whereas Apple GCC 4.0.1 build 5479 without -std=c99 or -std=gnu99
 218       implements the GNU C inline semantics and defines the macro
 219       __GNUC_GNU_INLINE__, but it does not warn and does not support
 220       __attribute__ ((__gnu_inline__)).
 221
 222       All in all, these are the possible combinations.  For every compiler,
 223       we need to choose ARGP_FS_EI so that the corresponding table cell
 224       contains an "ok".
 225
 226         \    ARGP_FS_EI                      inline   extern    extern
 227           \                                           inline    inline
 228       CC    \                                                   __attribute__
 229                                                                 ((gnu_inline))
 230
 231       gcc 4.3.0                              error    ok        ok
 232       gcc 4.3.0 -std=gnu99 -fgnu89-inline    error    ok        ok
 233       gcc 4.3.0 -std=gnu99                   ok       error     ok
 234
 235       gcc 4.2.2                              error    ok        ok
 236       gcc 4.2.2 -std=gnu99 -fgnu89-inline    error    ok        ok
 237       gcc 4.2.2 -std=gnu99                   error    warning   ok
 238
 239       gcc 4.1.2                              error    ok        warning
 240       gcc 4.1.2 -std=gnu99                   error    ok        warning
 241
 242       Apple gcc 4.0.1                        error    ok        warning
 243       Apple gcc 4.0.1 -std=gnu99             ok       error     warning
 244     */
 245 #  if defined __GNUC_STDC_INLINE__
 246 #   define ARGP_FS_EI inline
 247 #  elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2)
 248 #   define ARGP_FS_EI extern inline __attribute__ ((__gnu_inline__))
 249 #  else
 250 #   define ARGP_FS_EI extern inline
 251 #  endif
 252 # else
 253    /* With other compilers, assume the ISO C99 meaning of 'inline', if
 254       the compiler supports 'inline' at all.  */
 255 #  define ARGP_FS_EI inline
 256 # endif
 257 #endif
 258
 259 ARGP_FS_EI size_t
 260 __argp_fmtstream_write (argp_fmtstream_t __fs,
 261                         const char *__str, size_t __len)
 262 {
 263   if (__fs->p + __len <= __fs->end || __argp_fmtstream_ensure (__fs, __len))
 264     {
 265       memcpy (__fs->p, __str, __len);
 266       __fs->p += __len;
 267       return __len;
 268     }
 269   else
 270     return 0;
 271 }
 272
 273 ARGP_FS_EI int
 274 __argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str)
 275 {
 276   size_t __len = strlen (__str);
 277   if (__len)
 278     {
 279       size_t __wrote = __argp_fmtstream_write (__fs, __str, __len);
 280       return __wrote == __len ? 0 : -1;
 281     }
 282   else
 283     return 0;
 284 }
 285
 286 ARGP_FS_EI int
 287 __argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch)
 288 {
 289   if (__fs->p < __fs->end || __argp_fmtstream_ensure (__fs, 1))
 290     return *__fs->p++ = __ch;
 291   else
 292     return EOF;
 293 }
 294
 295 /* Set __FS's left margin to __LMARGIN and return the old value.  */
 296 ARGP_FS_EI size_t
 297 __argp_fmtstream_set_lmargin (argp_fmtstream_t __fs, size_t __lmargin)
 298 {
 299   size_t __old;
 300   if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
 301     __argp_fmtstream_update (__fs);
 302   __old = __fs->lmargin;
 303   __fs->lmargin = __lmargin;
 304   return __old;
 305 }
 306
 307 /* Set __FS's right margin to __RMARGIN and return the old value.  */
 308 ARGP_FS_EI size_t
 309 __argp_fmtstream_set_rmargin (argp_fmtstream_t __fs, size_t __rmargin)
 310 {
 311   size_t __old;
 312   if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
 313     __argp_fmtstream_update (__fs);
 314   __old = __fs->rmargin;
 315   __fs->rmargin = __rmargin;
 316   return __old;
 317 }
 318
 319 /* Set FS's wrap margin to __WMARGIN and return the old value.  */
 320 ARGP_FS_EI size_t
 321 __argp_fmtstream_set_wmargin (argp_fmtstream_t __fs, size_t __wmargin)
 322 {
 323   size_t __old;
 324   if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
 325     __argp_fmtstream_update (__fs);
 326   __old = __fs->wmargin;
 327   __fs->wmargin = __wmargin;
 328   return __old;
 329 }
 330
 331 /* Return the column number of the current output point in __FS.  */
 332 ARGP_FS_EI size_t
 333 __argp_fmtstream_point (argp_fmtstream_t __fs)
 334 {
 335   if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
 336     __argp_fmtstream_update (__fs);
 337   return __fs->point_col >= 0 ? __fs->point_col : 0;
 338 }
 339
 340 #if !_LIBC
 341 #undef __argp_fmtstream_putc
 342 #undef __argp_fmtstream_puts
 343 #undef __argp_fmtstream_write
 344 #undef __argp_fmtstream_set_lmargin
 345 #undef __argp_fmtstream_set_rmargin
 346 #undef __argp_fmtstream_set_wmargin
 347 #undef __argp_fmtstream_point
 348 #undef __argp_fmtstream_update
 349 #undef __argp_fmtstream_ensure
 350 #endif
 351
 352 #endif /* __OPTIMIZE__ */
 353
 354 #endif /* ARGP_FMTSTREAM_USE_LINEWRAP */
 355
 356 #endif /* argp-fmtstream.h */