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[/] [openrisc/] [trunk/] [gnu-stable/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [argp/] [argp-fmtstream.h] - Rev 859
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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 Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; 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 <config.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. */ #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, ...) __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 */
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