kc3-lang/gnulib/lib/argp-fmtstream.h

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  Date : 2018-01-01T00:57:25
  

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• lib/argp-fmtstream.h

• /* Word-wrapping and line-truncating streams.
     Copyright (C) 1997-2018 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
     Written by Miles Bader <miles@gnu.ai.mit.edu>.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  /* This package emulates glibc 'line_wrap_stream' semantics for systems that
     don't have that.  If the system does have it, it is just a wrapper for
     that.  This header file is only used internally while compiling argp, and
     shouldn't be installed.  */
  
  #ifndef _ARGP_FMTSTREAM_H
  #define _ARGP_FMTSTREAM_H
  
  #include <stdio.h>
  #include <string.h>
  #include <unistd.h>
  
  /* The __attribute__ feature is available in gcc versions 2.5 and later.
     The __-protected variants of the attributes 'format' and 'printf' are
     accepted by gcc versions 2.6.4 (effectively 2.7) and later.
     We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because
     gnulib and libintl do '#define printf __printf__' when they override
     the 'printf' function.  */
  #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
  # define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
  #else
  # define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
  #endif
  
  #if defined (__GNU_LIBRARY__) && defined (HAVE_LINEWRAP_H)
  /* line_wrap_stream is available, so use that.  */
  #define ARGP_FMTSTREAM_USE_LINEWRAP
  #endif
  
  #ifdef ARGP_FMTSTREAM_USE_LINEWRAP
  /* Just be a simple wrapper for line_wrap_stream; the semantics are
     *slightly* different, as line_wrap_stream doesn't actually make a new
     object, it just modifies the given stream (reversibly) to do
     line-wrapping.  Since we control who uses this code, it doesn't matter.  */
  
  #include <linewrap.h>
  
  typedef FILE *argp_fmtstream_t;
  
  #define argp_make_fmtstream line_wrap_stream
  #define __argp_make_fmtstream line_wrap_stream
  #define argp_fmtstream_free line_unwrap_stream
  #define __argp_fmtstream_free line_unwrap_stream
  
  #define __argp_fmtstream_putc(fs,ch) putc(ch,fs)
  #define argp_fmtstream_putc(fs,ch) putc(ch,fs)
  #define __argp_fmtstream_puts(fs,str) fputs(str,fs)
  #define argp_fmtstream_puts(fs,str) fputs(str,fs)
  #define __argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs)
  #define argp_fmtstream_write(fs,str,len) fwrite(str,1,len,fs)
  #define __argp_fmtstream_printf fprintf
  #define argp_fmtstream_printf fprintf
  
  #define __argp_fmtstream_lmargin line_wrap_lmargin
  #define argp_fmtstream_lmargin line_wrap_lmargin
  #define __argp_fmtstream_set_lmargin line_wrap_set_lmargin
  #define argp_fmtstream_set_lmargin line_wrap_set_lmargin
  #define __argp_fmtstream_rmargin line_wrap_rmargin
  #define argp_fmtstream_rmargin line_wrap_rmargin
  #define __argp_fmtstream_set_rmargin line_wrap_set_rmargin
  #define argp_fmtstream_set_rmargin line_wrap_set_rmargin
  #define __argp_fmtstream_wmargin line_wrap_wmargin
  #define argp_fmtstream_wmargin line_wrap_wmargin
  #define __argp_fmtstream_set_wmargin line_wrap_set_wmargin
  #define argp_fmtstream_set_wmargin line_wrap_set_wmargin
  #define __argp_fmtstream_point line_wrap_point
  #define argp_fmtstream_point line_wrap_point
  
  #else /* !ARGP_FMTSTREAM_USE_LINEWRAP */
  /* Guess we have to define our own version.  */
  
  
  struct argp_fmtstream
  {
    FILE *stream;                 /* The stream we're outputting to.  */
  
    size_t lmargin, rmargin;      /* Left and right margins.  */
    ssize_t wmargin;              /* Margin to wrap to, or -1 to truncate.  */
  
    /* Point in buffer to which we've processed for wrapping, but not output.  */
    size_t point_offs;
    /* Output column at POINT_OFFS, or -1 meaning 0 but don't add lmargin.  */
    ssize_t point_col;
  
    char *buf;                    /* Output buffer.  */
    char *p;                      /* Current end of text in BUF. */
    char *end;                    /* Absolute end of BUF.  */
  };
  
  typedef struct argp_fmtstream *argp_fmtstream_t;
  
  /* Return an argp_fmtstream that outputs to STREAM, and which prefixes lines
     written on it with LMARGIN spaces and limits them to RMARGIN columns
     total.  If WMARGIN >= 0, words that extend past RMARGIN are wrapped by
     replacing the whitespace before them with a newline and WMARGIN spaces.
     Otherwise, chars beyond RMARGIN are simply dropped until a newline.
     Returns NULL if there was an error.  */
  extern argp_fmtstream_t __argp_make_fmtstream (FILE *__stream,
                                                 size_t __lmargin,
                                                 size_t __rmargin,
                                                 ssize_t __wmargin);
  extern argp_fmtstream_t argp_make_fmtstream (FILE *__stream,
                                               size_t __lmargin,
                                               size_t __rmargin,
                                               ssize_t __wmargin);
  
  /* Flush __FS to its stream, and free it (but don't close the stream).  */
  extern void __argp_fmtstream_free (argp_fmtstream_t __fs);
  extern void argp_fmtstream_free (argp_fmtstream_t __fs);
  
  extern ssize_t __argp_fmtstream_printf (argp_fmtstream_t __fs,
                                          const char *__fmt, ...)
       _GL_ATTRIBUTE_FORMAT ((printf, 2, 3));
  extern ssize_t argp_fmtstream_printf (argp_fmtstream_t __fs,
                                        const char *__fmt, ...)
       _GL_ATTRIBUTE_FORMAT ((printf, 2, 3));
  
  #if _LIBC
  extern int __argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch);
  extern int argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch);
  
  extern int __argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str);
  extern int argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str);
  
  extern size_t __argp_fmtstream_write (argp_fmtstream_t __fs,
                                        const char *__str, size_t __len);
  extern size_t argp_fmtstream_write (argp_fmtstream_t __fs,
                                      const char *__str, size_t __len);
  #endif
  
  /* Access macros for various bits of state.  */
  #define argp_fmtstream_lmargin(__fs) ((__fs)->lmargin)
  #define argp_fmtstream_rmargin(__fs) ((__fs)->rmargin)
  #define argp_fmtstream_wmargin(__fs) ((__fs)->wmargin)
  #define __argp_fmtstream_lmargin argp_fmtstream_lmargin
  #define __argp_fmtstream_rmargin argp_fmtstream_rmargin
  #define __argp_fmtstream_wmargin argp_fmtstream_wmargin
  
  #if _LIBC
  /* Set __FS's left margin to LMARGIN and return the old value.  */
  extern size_t argp_fmtstream_set_lmargin (argp_fmtstream_t __fs,
                                            size_t __lmargin);
  extern size_t __argp_fmtstream_set_lmargin (argp_fmtstream_t __fs,
                                              size_t __lmargin);
  
  /* Set __FS's right margin to __RMARGIN and return the old value.  */
  extern size_t argp_fmtstream_set_rmargin (argp_fmtstream_t __fs,
                                            size_t __rmargin);
  extern size_t __argp_fmtstream_set_rmargin (argp_fmtstream_t __fs,
                                              size_t __rmargin);
  
  /* Set __FS's wrap margin to __WMARGIN and return the old value.  */
  extern size_t argp_fmtstream_set_wmargin (argp_fmtstream_t __fs,
                                            size_t __wmargin);
  extern size_t __argp_fmtstream_set_wmargin (argp_fmtstream_t __fs,
                                              size_t __wmargin);
  
  /* Return the column number of the current output point in __FS.  */
  extern size_t argp_fmtstream_point (argp_fmtstream_t __fs);
  extern size_t __argp_fmtstream_point (argp_fmtstream_t __fs);
  #endif
  
  /* Internal routines.  */
  extern void _argp_fmtstream_update (argp_fmtstream_t __fs);
  extern void __argp_fmtstream_update (argp_fmtstream_t __fs);
  extern int _argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
  extern int __argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
  
  #if !_LIBC || defined __OPTIMIZE__
  /* Inline versions of above routines.  */
  
  #if !_LIBC
  #define __argp_fmtstream_putc argp_fmtstream_putc
  #define __argp_fmtstream_puts argp_fmtstream_puts
  #define __argp_fmtstream_write argp_fmtstream_write
  #define __argp_fmtstream_set_lmargin argp_fmtstream_set_lmargin
  #define __argp_fmtstream_set_rmargin argp_fmtstream_set_rmargin
  #define __argp_fmtstream_set_wmargin argp_fmtstream_set_wmargin
  #define __argp_fmtstream_point argp_fmtstream_point
  #define __argp_fmtstream_update _argp_fmtstream_update
  #define __argp_fmtstream_ensure _argp_fmtstream_ensure
  #ifndef _GL_INLINE_HEADER_BEGIN
   #error "Please include config.h first."
  #endif
  _GL_INLINE_HEADER_BEGIN
  #ifndef ARGP_FS_EI
  # define ARGP_FS_EI _GL_INLINE
  #endif
  #endif
  
  #ifndef ARGP_FS_EI
  #define ARGP_FS_EI extern inline
  #endif
  
  ARGP_FS_EI size_t
  __argp_fmtstream_write (argp_fmtstream_t __fs, const char *__str, size_t __len)
  {
    if (__fs->p + __len <= __fs->end || __argp_fmtstream_ensure (__fs, __len))
      {
        memcpy (__fs->p, __str, __len);
        __fs->p += __len;
        return __len;
      }
    else
      return 0;
  }
  
  ARGP_FS_EI int
  __argp_fmtstream_puts (argp_fmtstream_t __fs, const char *__str)
  {
    size_t __len = strlen (__str);
    if (__len)
      {
        size_t __wrote = __argp_fmtstream_write (__fs, __str, __len);
        return __wrote == __len ? 0 : -1;
      }
    else
      return 0;
  }
  
  ARGP_FS_EI int
  __argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch)
  {
    if (__fs->p < __fs->end || __argp_fmtstream_ensure (__fs, 1))
      return *__fs->p++ = __ch;
    else
      return EOF;
  }
  
  /* Set __FS's left margin to __LMARGIN and return the old value.  */
  ARGP_FS_EI size_t
  __argp_fmtstream_set_lmargin (argp_fmtstream_t __fs, size_t __lmargin)
  {
    size_t __old;
    if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
      __argp_fmtstream_update (__fs);
    __old = __fs->lmargin;
    __fs->lmargin = __lmargin;
    return __old;
  }
  
  /* Set __FS's right margin to __RMARGIN and return the old value.  */
  ARGP_FS_EI size_t
  __argp_fmtstream_set_rmargin (argp_fmtstream_t __fs, size_t __rmargin)
  {
    size_t __old;
    if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
      __argp_fmtstream_update (__fs);
    __old = __fs->rmargin;
    __fs->rmargin = __rmargin;
    return __old;
  }
  
  /* Set FS's wrap margin to __WMARGIN and return the old value.  */
  ARGP_FS_EI size_t
  __argp_fmtstream_set_wmargin (argp_fmtstream_t __fs, size_t __wmargin)
  {
    size_t __old;
    if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
      __argp_fmtstream_update (__fs);
    __old = __fs->wmargin;
    __fs->wmargin = __wmargin;
    return __old;
  }
  
  /* Return the column number of the current output point in __FS.  */
  ARGP_FS_EI size_t
  __argp_fmtstream_point (argp_fmtstream_t __fs)
  {
    if ((size_t) (__fs->p - __fs->buf) > __fs->point_offs)
      __argp_fmtstream_update (__fs);
    return __fs->point_col >= 0 ? __fs->point_col : 0;
  }
  
  #if !_LIBC
  #undef __argp_fmtstream_putc
  #undef __argp_fmtstream_puts
  #undef __argp_fmtstream_write
  #undef __argp_fmtstream_set_lmargin
  #undef __argp_fmtstream_set_rmargin
  #undef __argp_fmtstream_set_wmargin
  #undef __argp_fmtstream_point
  #undef __argp_fmtstream_update
  #undef __argp_fmtstream_ensure
  _GL_INLINE_HEADER_END
  #endif
  
  #endif /* !_LIBC || __OPTIMIZE__ */
  
  #endif /* ARGP_FMTSTREAM_USE_LINEWRAP */
  
  #endif /* argp-fmtstream.h */
  

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