170 lines
4.2 KiB
C++
170 lines
4.2 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2019,
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University in Hagen,
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Faculty of Mathematics and Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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*/
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#include "getCommand.h"
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#include <string>
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#include <iostream>
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#include <functional>
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#include "StringUtils.h"
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#ifdef HAVE_LIBREADLINE
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#include <stdio.h>
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#include <readline/readline.h>
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#include <readline/history.h>
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#define HISTORY_FILE ".secondo_history"
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#define HISTORY_FILE_ENTRIES 200
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#endif
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using namespace std;
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bool getCommand(istream& in,
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const bool isPD,
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string& cmdRet,
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function<void(const bool)> showPrompt,
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function<bool(const string&)> isInternalCommand,
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const bool isStdInput,
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const string& prompt){
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bool complete = false;
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bool first = true;
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string line = "";
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bool inPD = false;
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cmdRet = ""; // clear any parts
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while (!complete && !in.eof() && !in.fail())
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{
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line = "";
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showPrompt( first );
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#ifdef HAVE_LIBREADLINE
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if(isStdInput){
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char* cline = readline(prompt.c_str());
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line = string(cline);
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free(cline);
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}
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else
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#endif
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getline( in, line );
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stringutils::trimRight(line);
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if ( line.length() > 0 || inPD) {
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if ( !isStdInput ) // Echo input if not standard input
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{
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cout << " " << line << endl;
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}
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bool comment = false;
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if(!isPD){
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comment = line[0] == '#';
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} else {
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if(!inPD){
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if(line.length()>0){
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comment = line[0] == '#';
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}
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if(!comment) {
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if(line.length()>1){
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if((line[0]=='/') && (line[1]=='/')){ // single line comment
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comment = true;
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} else if((line[0]=='/') && (line[1]=='*')) { // big comment
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comment = true;
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inPD = true;
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}
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}
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}
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} else {
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comment = true;
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if(line.length()>1){
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if( (line[0]=='*') && (line[1]=='/')){
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inPD = false;
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line = line.substr(2);
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stringutils::trim(line);
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comment = line.empty();
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}
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}
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}
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}
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if ( !comment ) // Process if not comment line
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{
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if ( line[line.length()-1] == ';' )
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{
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complete = true;
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line.erase( line.length()-1 );
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}
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if ( first ) // Check for single line command
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{
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if ( !complete )
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{
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complete = isInternalCommand( line );
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}
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cmdRet = line + " ";
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first = false;
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}
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else
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{
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cmdRet = cmdRet + "\n" + line + " ";
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}
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}
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}
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else // Empty line ends command
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{
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complete = cmdRet.length() > 0;
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first = true;
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}
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}
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// remove spaces from the end of cmd
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size_t end = cmdRet.find_last_not_of(" \t");
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if(end==string::npos)
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end = 0;
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else
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end += 1;
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cmdRet = cmdRet.substr(0,end);
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#ifdef HAVE_LIBREADLINE
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if(complete && (cmdRet.length()>0) && isStdInput){
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// get the last entry from the history if avaiable
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int noe = history_length;
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string last = "";
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if(noe){
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HIST_ENTRY* he = history_get(noe);
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if(he)
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last = string(he->line);
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}
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if(last!=cmdRet && (cmdRet.find_last_not_of(" \t\n")!=string::npos))
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add_history(cmdRet.c_str());
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}
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#endif
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return complete;
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}
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