Debugger: Add extension library to be loaded into CDB.exe

src/libs/qtcreatorcdbext/stringutils.cpp

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+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#include "stringutils.h"
+
+#include <cctype>
+#include <iostream>
+#include <sstream>
+
+static const char whiteSpace[] = " \t\r\n";
+
+void trimFront(std::string &s)
+{
+    if (s.empty())
+        return;
+    std::string::size_type pos = s.find_first_not_of(whiteSpace);
+    if (pos == 0)
+        return;
+    if (pos == std::string::npos) { // All blanks?!
+        s.clear();
+    } else {
+        s.erase(0, pos);
+    }
+}
+
+void trimBack(std::string &s)
+{
+    if (s.empty())
+        return;
+    std::string::size_type pos = s.find_last_not_of(whiteSpace);
+    if (pos == std::string::npos) { // All blanks?!
+        s.clear();
+    } else {
+        if (++pos != s.size())
+            s.erase(pos, s.size() - pos);
+    }
+}
+
+void simplify(std::string &s)
+{
+    trimFront(s);
+    trimBack(s);
+    if (s.empty())
+        return;
+
+    // 1) All blanks
+    const std::string::size_type size1 = s.size();
+    std::string::size_type pos = 0;
+    for ( ; pos < size1; pos++)
+        if (std::isspace(s.at(pos)))
+                s[pos] = ' ';
+    // 2) Simplify
+    for (pos = 0; pos < s.size(); ) {
+        std::string::size_type blankpos = s.find(' ', pos);
+        if (blankpos == std::string::npos)
+            break;
+        std::string::size_type tokenpos = blankpos + 1;
+        while (tokenpos < s.size() && s.at(tokenpos) == ' ')
+            tokenpos++;
+        if (tokenpos - blankpos > 1)
+            s.erase(blankpos, tokenpos - blankpos - 1);
+        pos = blankpos + 1;
+    }
+}
+
+void replace(std::wstring &s, wchar_t before, wchar_t after)
+{
+    const std::wstring::size_type size = s.size();
+    for (std::wstring::size_type i = 0; i < size; i++)
+        if (s.at(i) == before)
+            s[i] = after;
+}
+
+static inline void formatGdbmiChar(std::ostream &str, wchar_t c)
+{
+    switch (c) {
+    case L'\n':
+        str << "\\n";
+        break;
+    case L'\t':
+        str << "\\t";
+        break;
+    case L'\r':
+        str << "\\r";
+        break;
+    case L'\\':
+    case L'"':
+        str << '\\' << char(c);
+        break;
+    default:
+        if (c < 128) {
+            str << char(c);
+        } else {
+            // Always pad up to 3 digits in case a digit follows
+            const char oldFill = str.fill('0');
+            str << '\\' << std::oct;
+            str.width(3);
+            str << unsigned(c) << std::dec;
+            str.fill(oldFill);
+        }
+        break;
+    }
+}
+
+// Stream  a wstring onto a char stream doing octal escaping
+// suitable for GDBMI.
+
+void gdbmiStringFormat::format(std::ostream &str) const
+{
+    const std::string::size_type size = m_s.size();
+    for (std::string::size_type i = 0; i < size; i++)
+        formatGdbmiChar(str, wchar_t(m_s.at(i)));
+}
+
+void gdbmiWStringFormat::format(std::ostream &str) const
+{
+    const std::wstring::size_type size = m_w.size();
+    for (std::wstring::size_type i = 0; i < size; i++)
+        formatGdbmiChar(str, m_w.at(i));
+}
+
+std::string wStringToGdbmiString(const std::wstring &w)
+{
+    std::ostringstream str;
+    str << gdbmiWStringFormat(w);
+    return str.str();
+}
+
+std::string wStringToString(const std::wstring &w)
+{
+    if (w.empty())
+        return std::string();
+    const std::string::size_type size = w.size();
+    std::string rc;
+    rc.reserve(size);
+    for (std::string::size_type i = 0; i < size; i++)
+        rc.push_back(char(w.at(i)));
+    return rc;
+}
+
+// Format a map as a GDBMI hash {key="value",..}
+void formatGdbmiHash(std::ostream &os, const std::map<std::string, std::string> &m)
+{
+    typedef std::map<std::string, std::string>::const_iterator It;
+    const It begin = m.begin();
+    const It cend = m.end();
+    os << '{';
+    for (It it = begin; it != cend; ++it) {
+        if (it != begin)
+            os << ',';
+        os << it->first << "=\"" << gdbmiStringFormat(it->second) << '"';
+    }
+    os << '}';
+}