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comparison generator/fileout.cpp @ 1:e78566595089

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author mandel
date Mon, 11 May 2009 16:01:50 +0000
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0:36fb74dc547d 1:e78566595089
1 /****************************************************************************
2 **
3 ** Copyright (C) 1992-2008 Nokia. All rights reserved.
4 **
5 ** This file is part of Qt Jambi.
6 **
7 ** * Commercial Usage
8 * Licensees holding valid Qt Commercial licenses may use this file in
9 * accordance with the Qt Commercial License Agreement provided with the
10 * Software or, alternatively, in accordance with the terms contained in
11 * a written agreement between you and Nokia.
12 *
13 *
14 * GNU General Public License Usage
15 * Alternatively, this file may be used under the terms of the GNU
16 * General Public License versions 2.0 or 3.0 as published by the Free
17 * Software Foundation and appearing in the file LICENSE.GPL included in
18 * the packaging of this file. Please review the following information
19 * to ensure GNU General Public Licensing requirements will be met:
20 * http://www.fsf.org/licensing/licenses/info/GPLv2.html and
21 * http://www.gnu.org/copyleft/gpl.html. In addition, as a special
22 * exception, Nokia gives you certain additional rights. These rights
23 * are described in the Nokia Qt GPL Exception version 1.2, included in
24 * the file GPL_EXCEPTION.txt in this package.
25 *
26 * Qt for Windows(R) Licensees
27 * As a special exception, Nokia, as the sole copyright holder for Qt
28 * Designer, grants users of the Qt/Eclipse Integration plug-in the
29 * right for the Qt/Eclipse Integration to link to functionality
30 * provided by Qt Designer and its related libraries.
31 *
32 *
33 * If you are unsure which license is appropriate for your use, please
34 * contact the sales department at qt-sales@nokia.com.
35
36 **
37 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
38 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
39 **
40 ****************************************************************************/
41
42 #include "fileout.h"
43 #include "reporthandler.h"
44
45 #include <QFileInfo>
46 #include <QDir>
47
48 bool FileOut::dummy = false;
49 bool FileOut::diff = false;
50
51 #ifdef Q_OS_LINUX
52 const char* colorDelete = "\033[31m";
53 const char* colorAdd = "\033[32m";
54 const char* colorInfo = "\033[36m";
55 const char* colorReset = "\033[0m";
56 #else
57 const char* colorDelete = "";
58 const char* colorAdd = "";
59 const char* colorInfo = "";
60 const char* colorReset = "";
61 #endif
62
63 FileOut::FileOut(QString n):
64 m_name(n),
65 stream(&tmp),
66 isDone(false)
67 {}
68
69 static int* lcsLength(QList<QByteArray> a, QList<QByteArray> b) {
70 const int height = a.size() + 1;
71 const int width = b.size() + 1;
72
73 int *res = new int[width * height];
74
75 for (int row=0; row<height; row++) {
76 res[width * row] = 0;
77 }
78 for (int col=0; col<width; col++) {
79 res[col] = 0;
80 }
81
82 for (int row=1; row<height; row++) {
83 for (int col=1; col<width; col++) {
84
85 if (a[row-1] == b[col-1])
86 res[width * row + col] = res[width * (row-1) + col-1] + 1;
87 else
88 res[width * row + col] = qMax(res[width * row + col-1],
89 res[width * (row-1) + col]);
90 }
91 }
92 return res;
93 }
94
95 enum Type {Add, Delete, Unchanged};
96
97 struct Unit
98 {
99 Unit(Type type, int pos) :
100 type(type),
101 start(pos),
102 end(pos)
103 {}
104
105 Type type;
106 int start;
107 int end;
108
109 void print(QList<QByteArray> a, QList<QByteArray> b){
110 {
111 if (type == Unchanged) {
112 if ((end - start) > 9) {
113 for (int i = start; i <= start+2; i++)
114 printf(" %s\n", a[i].data());
115 printf("%s=\n= %d more lines\n=%s\n", colorInfo, end - start - 6, colorReset);
116 for (int i = end-2; i <= end; i++)
117 printf(" %s\n", a[i].data());
118 }
119 else
120 for (int i = start; i <= end; i++)
121 printf(" %s\n", a[i].data());
122 }
123 else if(type == Add) {
124 printf("%s", colorAdd);
125 for (int i = start; i <= end; i++){
126 printf("+ %s\n", b[i].data());
127 }
128 printf("%s", colorReset);
129 }
130 else if (type == Delete) {
131 printf("%s", colorDelete);
132 for (int i = start; i <= end; i++) {
133 printf("- %s\n", a[i].data());
134 }
135 printf("%s", colorReset);
136 }
137 }
138 }
139 };
140
141 static QList<Unit*> *unitAppend(QList<Unit*> *res, Type type, int pos)
142 {
143 if (res == 0) {
144 res = new QList<Unit*>;
145 res->append(new Unit(type, pos));
146 return res;
147 }
148
149 Unit *last = res->last();
150 if (last->type == type) {
151 last->end = pos;
152 } else {
153 res->append(new Unit(type, pos));
154 }
155 return res;
156 }
157
158 static QList<Unit*> *diffHelper(int *lcs, QList<QByteArray> a, QList<QByteArray> b, int row, int col) {
159 if (row>0 && col>0 && (a[row-1] == b[col-1])) {
160 return unitAppend(diffHelper(lcs, a, b, row-1, col-1), Unchanged, row-1);
161 }
162 else {
163 int width = b.size()+1;
164 if ((col > 0) && ((row==0) ||
165 lcs[width * row + col-1] >= lcs[width * (row-1) + col]))
166 {
167 return unitAppend(diffHelper(lcs, a, b, row, col-1), Add, col-1);
168 }
169 else if((row > 0) && ((col==0) ||
170 lcs[width * row + col-1] < lcs[width * (row-1) + col])){
171 return unitAppend(diffHelper(lcs, a, b, row-1, col), Delete, row-1);;
172 }
173 }
174 delete lcs;
175 return 0;
176 }
177
178 static void diff(QList<QByteArray> a, QList<QByteArray> b) {
179 QList<Unit*> *res = diffHelper(lcsLength(a, b), a, b, a.size(), b.size());
180 for (int i=0; i < res->size(); i++) {
181 Unit *unit = res->at(i);
182 unit->print(a, b);
183 delete(unit);
184 }
185 delete(res);
186 }
187
188
189 bool FileOut::done() {
190 Q_ASSERT( !isDone );
191 isDone = true;
192 bool fileEqual = false;
193 QFile fileRead(m_name);
194 QFileInfo info(fileRead);
195 stream.flush();
196 QByteArray original;
197 if (info.exists() && (diff || (info.size() == tmp.size()))) {
198 if ( !fileRead.open(QIODevice::ReadOnly) ) {
199 ReportHandler::warning(QString("failed to open file '%1' for reading")
200 .arg(fileRead.fileName()));
201 return false;
202 }
203
204 original = fileRead.readAll();
205 fileRead.close();
206 fileEqual = (original == tmp);
207 }
208
209 if( !fileEqual ) {
210 if( !FileOut::dummy ) {
211 QDir dir(info.absolutePath());
212 if (!dir.mkpath(dir.absolutePath())) {
213 ReportHandler::warning(QString("unable to create directory '%1'")
214 .arg(dir.absolutePath()));
215 return false;
216 }
217
218 QFile fileWrite(m_name);
219 if (!fileWrite.open(QIODevice::WriteOnly)) {
220 ReportHandler::warning(QString("failed to open file '%1' for writing")
221 .arg(fileWrite.fileName()));
222 return false;
223 }
224 stream.setDevice(&fileWrite);
225 stream << tmp;
226 }
227 if (diff) {
228 printf("%sFile: %s%s\n", colorInfo, qPrintable(m_name), colorReset);
229
230 ::diff(original.split('\n'), tmp.split('\n'));
231
232 printf("\n");
233 }
234 return true;
235 }
236 return false;
237 }