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+/* Word-wrapping and line-truncating streams.
+ Copyright (C) 1997, 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Written by Miles Bader <miles@gnu.ai.mit.edu>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* 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>
+
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#else
+/* This is a kludge to make the code compile on windows. Perhaps it
+ would be better to just replace ssize_t with int through out the
+ code. */
+# define ssize_t int
+#endif
+
+#if _LIBC || (defined (HAVE_FLOCKFILE) && defined(HAVE_PUTC_UNLOCKED) \
+ && defined (HAVE_FPUTS_UNLOCKED) && defined (HAVE_FWRITE_UNLOCKED) )
+/* Use locking funxtions */
+# define FLOCKFILE(f) flockfile(f)
+# define FUNLOCKFILE(f) funlockfile(f)
+# define PUTC_UNLOCKED(c, f) putc_unlocked((c), (f))
+# define FPUTS_UNLOCKED(s, f) fputs_unlocked((s), (f))
+# define FWRITE_UNLOCKED(b, s, n, f) fwrite_unlocked((b), (s), (n), (f))
+#else
+/* Disable stdio locking */
+# define FLOCKFILE(f)
+# define FUNLOCKFILE(f)
+# define PUTC_UNLOCKED(c, f) putc((c), (f))
+# define FPUTS_UNLOCKED(s, f) fputs((s), (f))
+# define FWRITE_UNLOCKED(b, s, n, f) fwrite((b), (s), (n), (f))
+#endif /* No thread safe i/o */
+
+#if (_LIBC - 0 && !defined (USE_IN_LIBIO)) \
+ || (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. */
+
+#ifndef __const
+#define __const const
+#endif
+
+
+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, ...)
+ PRINTF_STYLE(2,3);
+extern ssize_t argp_fmtstream_printf (argp_fmtstream_t __fs,
+ __const char *__fmt, ...)
+ PRINTF_STYLE(2,3);
+
+#if __STDC_VERSION__ - 199900L < 1
+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 /* __STDC_VERSION__ - 199900L < 1 */
+
+/* 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 __STDC_VERSION__ - 199900L < 1
+/* 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 /* __STDC_VERSION__ - 199900L < 1 */
+
+/* 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);
+
+#ifdef __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
+#endif
+
+#ifndef ARGP_FS_EI
+#if defined(__GNUC__) && !defined(__GNUC_STDC_INLINE__)
+#define ARGP_FS_EI extern inline
+#else
+#define ARGP_FS_EI inline
+#endif
+#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
+#endif
+
+#endif /* __OPTIMIZE__ */
+
+#endif /* ARGP_FMTSTREAM_USE_LINEWRAP */
+
+#endif /* argp-fmtstream.h */