aboutsummaryrefslogtreecommitdiffstats
path: root/pylupdate/proparser.cpp
blob: 54ee43bd76109cc2cd2cb70e1de975fd0fce7155 (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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
/*
 * This file is part of the PySide Tools project.
 *
 * Copyright (C) 1992-2005 Trolltech AS. All rights reserved.
 * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
 *
 * Contact: PySide team <pyside@openbossa.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include "proparser.h"

#include <qdir.h>
#include <qfile.h>
#include <qfileinfo.h>
#include <qregexp.h>
#include <qstringlist.h>
#include <qtextstream.h>

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

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

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

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

QMap<QString, QString> proFileTagMap( const QString& text )
{
    QString t = text;

    QMap<QString, QString> tagMap;
    bool stillProcess = true; // If include() has a $$tag then we need to reprocess

    while (stillProcess) {
        /*
            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(QString("#[^\n]*\n")), QString(" ") );

        /*
            Process include() commands.
            $$PWD is a special case so we have to change it while
            we know where the included file is.
        */
        QRegExp callToInclude("include\\s*\\(\\s*([^()\\s]+)\\s*\\)");
        int i = 0;
        while ( (i = callToInclude.indexIn(t, i)) != -1 ) {
            bool doneWithVar = false;
            QString fileName = callToInclude.cap(1);
            QString after = fileName.replace("$$PWD", QDir::currentPath());
            if (!tagMap.isEmpty() && after.contains("$$")) {
                QRegExp var( "\\$\\$[({]?([a-zA-Z0-9_]+)[)}]?" );
                int ii = 0;
                while ((ii = after.indexOf(var, ii)) != -1) {
                    if (tagMap.contains(var.cap(1))) {
                        after.replace(ii, var.cap(0).length(), tagMap[var.cap(1)]);
                    } else { // Couldn't find it
                        doneWithVar = true;
                        break;
                    }
                }

            }
            if (doneWithVar || !after.contains("$$")) {
                after = loadFile(after);
                QFileInfo fi(callToInclude.cap(1));
                after.replace("$$PWD", fi.path());
                t.replace( i, callToInclude.matchedLength(), after );
            }
            i += after.length();
        }

        /*
            Strip comments, merge lines ending with backslash, add
            spaces around '=' and '+=', replace '\n' with ';', and
            simplify white spaces.
        */
        t.replace( QRegExp(QString("#[^\n]*\n")), QString(" ") );
        t.replace( QRegExp(QString("\\\\[^\n\\S]*\n")), QString(" ") );
        t.replace( "=", QString(" = ") );
        t.replace( "+ =", QString(" += ") );
        t.replace( "\n", QString(";") );
        t.replace( "\r", QString("") ); // remove carriage return
        t = t.simplified();

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

            if ( toks.count() >= 3 &&
                (toks[1] == QString("=") || toks[1] == QString("+=") ||
                toks[1] == QString("*=")) ) {
                QString tag = toks.first();
                int k = tag.lastIndexOf( QChar(':') ); // 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 == QString("=") )
                        tagMap.insert( tag, toks.join(" ") );
                    else
                        tagMap[tag] += QChar( ' ' ) + toks.join( " " );
                } else {
                    tagMap[tag] = toks.join( " " );
                }
            }
        }
        /*
            Expand $$variables within the 'value' part of a 'key = value'
            pair.
        */
        QRegExp var( "\\$\\$[({]?([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 == "system" ) {
                    // skip system(); it will be handled in the next pass
                    ++i;
                } else {
                    if ( tagMap.contains(invocation) )
                        after = tagMap[invocation];
                    else if (invocation.toLower() == "pwd")
                        after = QDir::currentPath();
                    (*it).replace( i, len, after );
                    i += after.length();
                }
            }
        }

        /*
          Execute system() calls.
        */
        QRegExp callToSystem( "\\$\\$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 += buff;
                }
                (*it).replace( i, callToSystem.matchedLength(), after );
                i += after.length();
            }
        }
        stillProcess = callToInclude.indexIn(t) != -1;
    }
    return tagMap;
}