xref: /trunk/main/desktop/win32/source/extendloaderenvironment.hxx (revision 0a1e2f0e)

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 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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#ifndef INCLUDED_DESKTOP_WIN32_SOURCE_EXTENDLOADERENVIRONMENT_HXX
#define INCLUDED_DESKTOP_WIN32_SOURCE_EXTENDLOADERENVIRONMENT_HXX

#include "sal/config.h"

#include <cstddef>

#include <tchar.h>

#define MY_LENGTH(s) (sizeof (s) / sizeof *(s) - 1)
#define MY_STRING(s) (s), MY_LENGTH(s)

namespace desktop_win32 {

inline WCHAR * commandLineAppend(
    WCHAR * buffer, WCHAR const * text, std::size_t length)
{
    wcsncpy(buffer, text, length + 1); // trailing null
    return buffer + length;
}

inline WCHAR * commandLineAppend(WCHAR * buffer, WCHAR const * text) {
    return commandLineAppend(buffer, text, wcslen(text));
}

inline WCHAR * commandLineAppendEncoded(WCHAR * buffer, WCHAR const * text) {
    std::size_t n = 0;
    for (;;) {
        WCHAR c = *text++;
        if (c == L'\0') {
            break;
        } else if (c == L'$') {
            buffer = commandLineAppend(buffer, MY_STRING(L"\\$"));
            n = 0;
        } else if (c == L'\\') {
            buffer = commandLineAppend(buffer, MY_STRING(L"\\\\"));
            n += 2;
        } else {
            *buffer++ = c;
            n = 0;
        }
    }
    // The command line will continue with a double quote, so double any
    // preceding backslashes as required by Windows:
    for (std::size_t i = 0; i < n; ++i) {
        *buffer++ = L'\\';
    }
    *buffer = L'\0';
    return buffer;
}

// Set the PATH environment variable in the current (loader) process, so that a
// following CreateProcess has the necessary environment:
//
// @param binPath
// Must point to an array of size at least MAX_PATH.  Is filled with the null
// terminated full path to the "bin" file corresponding to the current
// executable.
//
// @param iniDirectory
// Must point to an array of size at least MAX_PATH.  Is filled with the null
// terminated full directory path (ending in "\") to the "ini" file
// corresponding to the current executable.
void extendLoaderEnvironment(WCHAR * binPath, WCHAR * iniDirectory);

}

#endif