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KDECore

kmacroexpander_win.cpp

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00001 /*
00002     This file is part of the KDE libraries
00003 
00004     Copyright (c) 2008 Oswald Buddenhagen <ossi@kde.org>
00005 
00006     This library is free software; you can redistribute it and/or
00007     modify it under the terms of the GNU Library General Public
00008     License as published by the Free Software Foundation; either
00009     version 2 of the License, or (at your option) any later version.
00010 
00011     This library is distributed in the hope that it will be useful,
00012     but WITHOUT ANY WARRANTY; without even the implied warranty of
00013     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014     Library General Public License for more details.
00015 
00016     You should have received a copy of the GNU Library General Public License
00017     along with this library; see the file COPYING.LIB.  If not, write to
00018     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00019     Boston, MA 02110-1301, USA.
00020 */
00021 
00022 #include "kmacroexpander_p.h"
00023 #include "kshell_p.h"
00024 
00025 #include "kshell.h"
00026 
00027 #include <QString>
00028 #include <QStringList>
00029 
00030 bool KMacroExpanderBase::expandMacrosShellQuote( QString &str, int &pos )
00031 {
00032     int len;
00033     int pos2;
00034     ushort uc;
00035     ushort ec = d->escapechar.unicode();
00036     bool shellQuote = false; // shell is in quoted state
00037     bool crtQuote = false; // c runtime is in quoted state
00038     bool escaped = false; // previous char was a circumflex
00039     int bslashes = 0; // previous chars were backslashes
00040     int parens = 0; // parentheses nesting level
00041     QStringList rst;
00042     QString rsts;
00043 
00044     while (pos < str.length()) {
00045         ushort cc = str.unicode()[pos].unicode();
00046         if (escaped) // prevent anomalies due to expansion
00047             goto notcf;
00048         if (ec != 0) {
00049             if (cc != ec)
00050                 goto nohit;
00051             if (!(len = expandEscapedMacro( str, pos, rst )))
00052                 goto nohit;
00053         } else {
00054             if (!(len = expandPlainMacro( str, pos, rst )))
00055                 goto nohit;
00056         }
00057             if (len < 0) {
00058                 pos -= len;
00059                 continue;
00060             }
00061             if (shellQuote != crtQuote) // Silly, isn't it? Ahoy to Redmond.
00062                 return false;
00063             if (shellQuote) {
00064                 rsts = KShell::quoteArgInternal( rst.join( QLatin1String(" ") ), true );
00065             } else {
00066                 if (rst.isEmpty()) {
00067                     str.remove( pos, len );
00068                     continue;
00069                 }
00070                 rsts = KShell::joinArgs( rst );
00071             }
00072             pos2 = 0;
00073             while (pos2 < rsts.length() &&
00074                    ((uc = rsts.unicode()[pos2].unicode()) == '\\' || uc == '^'))
00075                 pos2++;
00076             if (pos2 < rsts.length() && rsts.unicode()[pos2].unicode() == '"') {
00077                 QString bsl;
00078                 bsl.reserve( bslashes );
00079                 for (; bslashes; bslashes--)
00080                     bsl.append( QLatin1String("\\") );
00081                 rsts.prepend( bsl );
00082             }
00083             bslashes = 0;
00084             rst.clear();
00085             str.replace( pos, len, rsts );
00086             pos += rsts.length();
00087             continue;
00088       nohit:
00089         if (!escaped && !shellQuote && cc == '^') {
00090             escaped = true;
00091         } else {
00092           notcf:
00093             if (cc == '\\') {
00094                 bslashes++;
00095             } else {
00096                 if (cc == '"') {
00097                     if (!escaped)
00098                         shellQuote = !shellQuote;
00099                     if (!(bslashes & 1))
00100                         crtQuote = !crtQuote;
00101                 } else if (!shellQuote) {
00102                     if (cc == '(')
00103                         parens++;
00104                     else if (cc == ')')
00105                         if (--parens < 0)
00106                             break;
00107                 }
00108                 bslashes = 0;
00109             }
00110             escaped = false;
00111         }
00112         pos++;
00113     }
00114     return true;
00115 }

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