From 9255ee3150832d7e235fc0711f0efa70700559e7 Mon Sep 17 00:00:00 2001 From: Elena Zannoni Date: Sun, 8 Dec 2002 22:31:39 +0000 Subject: Import of readline 4.3. Non-readline modified files: src/gdb/ChangeLog src/gdb/defs.h src/gdb/cli/cli-cmds.c src/gdb/cli/cli-setshow.c src/gdb/tui/ChangeLog src/gdb/tui/tuiWin.c In readline directory: * compat.c, mbutil.c, misc.c, rlmbutil.h, rltypedefs.h, text.c, doc/history.0, doc/history.3, support/wcwidth.c, examples/readlinebuf.h, examples/rlcat.c: New files. * CHANGELOG, CHANGES, INSTALL, MANIFEST, Makefile.in, README, aclocal.m4, ansi_stdlib.h, bind.c, callback.c, chardefs.h, complete.c, config.h.in, configure, configure.in, display.c, emacs_keymap.c, funmap.c, histexpand.c, histfile.c, histlib.h, history.c, history.h, histsearch.c, input.c, isearch.c, keymaps.c, keymaps.h, kill.c, macro.c, nls.c, parens.c, posixdir.h, readline.c, readline.h, rlconf.h, rldefs.h, rlprivate.h, rlshell.h, rlstdc.h, rltty.c, savestring.c, search.c, shell.c, signals.c, terminal.c, tilde.c, tilde.h, undo.c, util.c, vi_keymap.c, vi_mode.c, xmalloc.c, xmalloc.h, doc/Makefile.in, doc/hist.texinfo, doc/hstech.texinfo, doc/hsuser.texinfo, doc/manvers.texinfo, doc/readline.3, doc/rlman.texinfo, doc/rltech.texinfo, doc/rluser.texinfo doc/rluserman.texinfo, doc/texi2dvi, doc/texi2html, shlib/Makefile.in, support/install.sh, support/mkdirs, support/mkdist, support/shlib-install, support/shobj-conf, examples/Inputrc, examples/Makefile.in, examples/fileman.c, examples/histexamp.c, examples/manexamp.c, examples/rl.c, examples/rlfe.c, examples/rltest.c, examples/rlversion.c: Modified files. --- readline/examples/readlinebuf.h | 139 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 139 insertions(+) create mode 100644 readline/examples/readlinebuf.h (limited to 'readline/examples/readlinebuf.h') diff --git a/readline/examples/readlinebuf.h b/readline/examples/readlinebuf.h new file mode 100644 index 0000000..91ef4d6 --- /dev/null +++ b/readline/examples/readlinebuf.h @@ -0,0 +1,139 @@ +/******************************************************************************* + * $Revision$ + * $Date$ + * $Author$ + * + * Contents: A streambuf which uses the GNU readline library for line I/O + * (c) 2001 by Dimitris Vyzovitis [vyzo@media.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 2 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, write to the Free + * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + ******************************************************************************/ + +#ifndef _READLINEBUF_H_ +#define _READLINEBUF_H_ + +#include +#include +#include +#include +#include + +#include +#include + +#if (defined __GNUC__) && (__GNUC__ < 3) +#include +#else +#include +using std::streamsize; +using std::streambuf; +#endif + +class readlinebuf : public streambuf { +public: +#if (defined __GNUC__) && (__GNUC__ < 3) + typedef char char_type; + typedef int int_type; + typedef streampos pos_type; + typedef streamoff off_type; +#endif + static const int_type eof = EOF; // this is -1 + static const int_type not_eof = 0; + +private: + const char* prompt_; + bool history_; + char* line_; + int low_; + int high_; + +protected: + + virtual int_type showmanyc() const { return high_ - low_; } + + virtual streamsize xsgetn( char_type* buf, streamsize n ) { + int rd = n > (high_ - low_)? (high_ - low_) : n; + memcpy( buf, line_, rd ); + low_ += rd; + + if ( rd < n ) { + low_ = high_ = 0; + free( line_ ); // free( NULL ) is a noop + line_ = readline( prompt_ ); + if ( line_ ) { + high_ = strlen( line_ ); + if ( history_ && high_ ) add_history( line_ ); + rd += xsgetn( buf + rd, n - rd ); + } + } + + return rd; + } + + virtual int_type underflow() { + if ( high_ == low_ ) { + low_ = high_ = 0; + free( line_ ); // free( NULL ) is a noop + line_ = readline( prompt_ ); + if ( line_ ) { + high_ = strlen( line_ ); + if ( history_ && high_ ) add_history( line_ ); + } + } + + if ( low_ < high_ ) return line_[low_]; + else return eof; + } + + virtual int_type uflow() { + int_type c = underflow(); + if ( c != eof ) ++low_; + return c; + } + + virtual int_type pbackfail( int_type c = eof ) { + if ( low_ > 0 ) --low_; + else if ( c != eof ) { + if ( high_ > 0 ) { + char* nl = (char*)realloc( line_, high_ + 1 ); + if ( nl ) { + line_ = (char*)memcpy( nl + 1, line_, high_ ); + high_ += 1; + line_[0] = char( c ); + } else return eof; + } else { + assert( !line_ ); + line_ = (char*)malloc( sizeof( char ) ); + *line_ = char( c ); + high_ = 1; + } + } else return eof; + + return not_eof; + } + +public: + readlinebuf( const char* prompt = NULL, bool history = true ) + : prompt_( prompt ), history_( history ), + line_( NULL ), low_( 0 ), high_( 0 ) { + setbuf( 0, 0 ); + } + + +}; + +#endif -- cgit v1.1