summaryrefslogtreecommitdiffstats
path: root/tools/porting/src/proparser.cpp
blob: 6a86e9f3ef4241274ee0e734065fc0da8771b431 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the qt3to4 porting application of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "proparser.h"

#include <QDir>
#include <QFile>
#include <QFileInfo>
#include <QRegExp>
#include <QStringList>
#include <QTextStream>

#ifdef Q_OS_UNIX
#include <unistd.h>
#endif

#ifdef Q_OS_WIN32
#define QT_POPEN _popen
#else
#define QT_POPEN popen
#endif

QT_BEGIN_NAMESPACE

QString loadFile( const QString &fileName )
{
    QFile file( fileName );
    if ( !file.open(QIODevice::ReadOnly) ) {
        fprintf( stderr, "error: Cannot load '%s': %s\n",
                 file.fileName().toLocal8Bit().constData(),
                 file.errorString().toLatin1().constData() );
        return QString();
    }

    QTextStream in( &file );
    return in.readAll();
}

QMap<QString, QString> proFileTagMap( const QString& text, QString currentPath )
{
    QString t = text;
    if (currentPath.isEmpty())
        currentPath = QDir::currentPath();


    QMap<QString, QString> tagMap;
        /*
            Strip any commments before we try to include.  We
            still need to do it after we include to make sure the
            included file does not have comments
        */
        t.replace( QRegExp(QLatin1String("#[^\n]*\n")), QLatin1String(" ") );
      /*
            Strip comments, merge lines ending with backslash, add
            spaces around '=' and '+=', replace '\n' with ';', and
            simplify white spaces.
        */
        t.replace( QRegExp(QLatin1String("#[^\n]*\n")), QLatin1String(" ") );
        t.replace( QRegExp(QLatin1String("\\\\[^\n\\S]*\n")), QLatin1String(" ") );
        t.replace( QLatin1String("="), QLatin1String(" = ") );
        t.replace( QLatin1String("+ ="), QLatin1String(" += ") );
        t.replace( QLatin1String("\n"), QLatin1String(";") );
        t = t.simplified();

        /*
            Populate tagMap with 'key = value' entries.
        */
        QStringList lines = t.split(QLatin1Char(';'));
        QStringList::Iterator line;
        for ( line = lines.begin(); line != lines.end(); ++line ) {
            QStringList toks = (*line).split(QLatin1Char(' '), QString::SkipEmptyParts);

            if ( toks.count() >= 3 &&
                (toks[1] == QLatin1String("=") || toks[1] == QLatin1String("+=") ||
                toks[1] == QLatin1String("*=")) ) {
                QString tag = toks.first();
                int k = tag.lastIndexOf( QLatin1Char(':') ); // as in 'unix:'
                if ( k != -1 )
                    tag = tag.mid( k + 1 );
                toks.erase( toks.begin() );

                QString action = toks.first();
                toks.erase( toks.begin() );

                if ( tagMap.contains(tag) ) {
                    if ( action == QLatin1String("=") )
                        tagMap.insert( tag, toks.join(QLatin1String(" ")) );
                    else
                        tagMap[tag] += QLatin1Char( ' ' ) + toks.join( QLatin1String(" ") );
                } else {
                    tagMap[tag] = toks.join( QLatin1String(" ") );
                }
            }
        }
        /*
            Expand $$variables within the 'value' part of a 'key = value'
            pair.
        */
        QRegExp var( QLatin1String("\\$\\$[({]?([a-zA-Z0-9_]+)[)}]?") );
        QMap<QString, QString>::Iterator it;
        for ( it = tagMap.begin(); it != tagMap.end(); ++it ) {
            int i = 0;
            while ( (i = var.indexIn((*it), i)) != -1 ) {
                int len = var.matchedLength();
                QString invocation = var.cap(1);
                QString after;

                if ( invocation == QLatin1String("system") ) {
                    // skip system(); it will be handled in the next pass
                    ++i;
                } else {
                    if ( tagMap.contains(invocation) )
                        after = tagMap[invocation];
                    else if (invocation.toLower() == QLatin1String("pwd"))
                        after = currentPath;
                    (*it).replace( i, len, after );
                    i += after.length();
                }
            }
        }

        /*
          Execute system() calls.
        */
        QRegExp callToSystem( QLatin1String("\\$\\$system\\s*\\(([^()]*)\\)") );
        for ( it = tagMap.begin(); it != tagMap.end(); ++it ) {
            int i = 0;
            while ( (i = callToSystem.indexIn((*it), i)) != -1 ) {
                /*
                  This code is stolen from qmake's project.cpp file.
                  Ideally we would use the same parser, so we wouldn't
                  have this code duplication.
                */
                QString after;
                char buff[256];
                FILE *proc = QT_POPEN( callToSystem.cap(1).toLatin1().constData(), "r" );
                while ( proc && !feof(proc) ) {
                    int read_in = int(fread( buff, 1, 255, proc ));
                    if ( !read_in )
                        break;
                    for ( int i = 0; i < read_in; i++ ) {
                        if ( buff[i] == '\n' || buff[i] == '\t' )
                            buff[i] = ' ';
                    }
                    buff[read_in] = '\0';
                    after += QLatin1String(buff);
                }
                (*it).replace( i, callToSystem.matchedLength(), after );
                i += after.length();
            }
        }
    return tagMap;
}

QT_END_NAMESPACE