File indexing completed on 2024-04-28 03:53:48

 /*
     This file is part of the KDE libraries
 
     SPDX-FileCopyrightText: 2008 Oswald Buddenhagen <ossi@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "kmacroexpander_p.h"
 #include "kshell_p.h"
 
 #include "kshell.h"
 
 #include <QString>
 #include <QStringList>
 
 bool KMacroExpanderBase::expandMacrosShellQuote(QString &str, int &pos)
 {
     int len;
     int pos2;
     ushort uc;
     ushort ec = d->escapechar.unicode();
     bool shellQuote = false; // shell is in quoted state
     bool crtQuote = false; // c runtime is in quoted state
     bool escaped = false; // previous char was a circumflex
     int bslashes = 0; // previous chars were backslashes
     int parens = 0; // parentheses nesting level
     QStringList rst;
     QString rsts;
 
     while (pos < str.length()) {
         ushort cc = str.unicode()[pos].unicode();
         if (escaped) { // prevent anomalies due to expansion
             goto notcf;
         }
         if (ec != 0) {
             if (cc != ec) {
                 goto nohit;
             }
             if (!(len = expandEscapedMacro(str, pos, rst))) {
                 goto nohit;
             }
         } else {
             if (!(len = expandPlainMacro(str, pos, rst))) {
                 goto nohit;
             }
         }
         if (len < 0) {
             pos -= len;
             continue;
         }
         if (shellQuote != crtQuote) { // Silly, isn't it? Ahoy to Redmond.
             return false;
         }
         if (shellQuote) {
             rsts = KShell::quoteArgInternal(rst.join(QLatin1Char(' ')), true);
         } else {
             if (rst.isEmpty()) {
                 str.remove(pos, len);
                 continue;
             }
             rsts = KShell::joinArgs(rst);
         }
         pos2 = 0;
         while (pos2 < rsts.length() && ((uc = rsts.unicode()[pos2].unicode()) == '\\' || uc == '^')) {
             pos2++;
         }
         if (pos2 < rsts.length() && rsts.unicode()[pos2].unicode() == '"') {
             QString bsl;
             bsl.reserve(bslashes);
             for (; bslashes; bslashes--) {
                 bsl.append(QLatin1String("\\"));
             }
             rsts.prepend(bsl);
         }
         bslashes = 0;
         rst.clear();
         str.replace(pos, len, rsts);
         pos += rsts.length();
         continue;
     nohit:
         if (!escaped && !shellQuote && cc == '^') {
             escaped = true;
         } else {
         notcf:
             if (cc == '\\') {
                 bslashes++;
             } else {
                 if (cc == '"') {
                     if (!escaped) {
                         shellQuote = !shellQuote;
                     }
                     if (!(bslashes & 1)) {
                         crtQuote = !crtQuote;
                     }
                 } else if (!shellQuote) {
                     if (cc == '(') {
                         parens++;
                     } else if (cc == ')')
                         if (--parens < 0) {
                             break;
                         }
                 }
                 bslashes = 0;
             }
             escaped = false;
         }
         pos++;
     }
     return true;
 }