| /* Word-wrapping and line-truncating streams. |
| Copyright (C) 1997, 2006-2013 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 <http://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 (_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. */ |
| |
| 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 |
| _GL_INLINE_HEADER_BEGIN |
| #ifndef ARGP_FS_EI |
| # define ARGP_FS_EI _GL_INLINE |
| #endif |
| #endif |
| |
| #ifndef ARGP_FS_EI |
| # ifdef __GNUC__ |
| /* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99 |
| inline semantics, unless -fgnu89-inline is used. It defines a macro |
| __GNUC_STDC_INLINE__ to indicate this situation or a macro |
| __GNUC_GNU_INLINE__ to indicate the opposite situation. |
| |
| GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline |
| semantics but warns, unless -fgnu89-inline is used: |
| warning: C99 inline functions are not supported; using GNU89 |
| warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute |
| It defines a macro __GNUC_GNU_INLINE__ to indicate this situation. |
| |
| Whereas Apple GCC 4.0.1 build 5479 without -std=c99 or -std=gnu99 |
| implements the GNU C inline semantics and defines the macro |
| __GNUC_GNU_INLINE__, but it does not warn and does not support |
| __attribute__ ((__gnu_inline__)). |
| |
| All in all, these are the possible combinations. For every compiler, |
| we need to choose ARGP_FS_EI so that the corresponding table cell |
| contains an "ok". |
| |
| \ ARGP_FS_EI inline extern extern |
| \ inline inline |
| CC \ __attribute__ |
| ((gnu_inline)) |
| |
| gcc 4.3.0 error ok ok |
| gcc 4.3.0 -std=gnu99 -fgnu89-inline error ok ok |
| gcc 4.3.0 -std=gnu99 ok error ok |
| |
| gcc 4.2.2 error ok ok |
| gcc 4.2.2 -std=gnu99 -fgnu89-inline error ok ok |
| gcc 4.2.2 -std=gnu99 error warning ok |
| |
| gcc 4.1.2 error ok warning |
| gcc 4.1.2 -std=gnu99 error ok warning |
| |
| Apple gcc 4.0.1 error ok warning |
| Apple gcc 4.0.1 -std=gnu99 ok error warning |
| */ |
| # if defined __GNUC_STDC_INLINE__ |
| # define ARGP_FS_EI inline |
| # elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2) |
| # define ARGP_FS_EI extern inline __attribute__ ((__gnu_inline__)) |
| # else |
| # define ARGP_FS_EI extern inline |
| # endif |
| # else |
| /* With other compilers, assume the ISO C99 meaning of 'inline', if |
| the compiler supports 'inline' at all. */ |
| # 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 |
| _GL_INLINE_HEADER_END |
| #endif |
| |
| #endif /* !_LIBC || __OPTIMIZE__ */ |
| |
| #endif /* ARGP_FMTSTREAM_USE_LINEWRAP */ |
| |
| #endif /* argp-fmtstream.h */ |
