argp-fmtstream.h
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- /* Word-wrapping and line-truncating streams.
- Copyright (C) 1997 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__
- #ifdef HAVE_CONFIG_H
- #include <swarmconfig.h>
- #endif
- #include <stdio.h>
- #include <string.h>
- #include <unistd.h>
- #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. */
- /* HPUX 11 defines this */
- #undef __const
- #define __const const
- 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, ...)
- __attribute__ ((__format__ (printf, 2, 3)));
- extern ssize_t argp_fmtstream_printf (argp_fmtstream_t __fs,
- __const char *__fmt, ...)
- __attribute__ ((__format__ (printf, 2, 3)));
- 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);
- /* 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
- /* 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);
- /* 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
- #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
- #endif
- #endif /* __OPTIMIZE__ */
- #endif /* ARGP_FMTSTREAM_USE_LINEWRAP */
- #endif /* __ARGP_FMTSTREAM_H__ */