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/*
* This file is part of the API Extractor project.
*
* Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
*
* Contact: PySide team <contact@pyside.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 "fileout.h"
#include "reporthandler.h"
#include <QtCore/QTextCodec>
#include <QtCore/QFileInfo>
#include <QtCore/QDir>
#include <cstdio>
bool FileOut::dummy = false;
bool FileOut::diff = false;
#ifdef Q_OS_LINUX
const char* colorDelete = "\033[31m";
const char* colorAdd = "\033[32m";
const char* colorInfo = "\033[36m";
const char* colorReset = "\033[0m";
#else
const char* colorDelete = "";
const char* colorAdd = "";
const char* colorInfo = "";
const char* colorReset = "";
#endif
FileOut::FileOut(QString n):
name(n),
stream(&tmp),
isDone(false)
{}
static int* lcsLength(QList<QByteArray> a, QList<QByteArray> b)
{
const int height = a.size() + 1;
const int width = b.size() + 1;
int *res = new int[width * height];
for (int row = 0; row < height; row++)
res[width * row] = 0;
for (int col = 0; col < width; col++)
res[col] = 0;
for (int row = 1; row < height; row++) {
for (int col = 1; col < width; col++) {
if (a[row-1] == b[col-1])
res[width * row + col] = res[width * (row-1) + col-1] + 1;
else
res[width * row + col] = qMax(res[width * row + col-1],
res[width * (row-1) + col]);
}
}
return res;
}
enum Type {
Add,
Delete,
Unchanged
};
struct Unit
{
Unit(Type type, int pos) :
type(type),
start(pos),
end(pos) {}
Type type;
int start;
int end;
void print(QList<QByteArray> a, QList<QByteArray> b)
{
if (type == Unchanged) {
if ((end - start) > 9) {
for (int i = start; i <= start + 2; i++)
std::printf(" %s\n", a[i].data());
std::printf("%s=\n= %d more lines\n=%s\n", colorInfo, end - start - 6, colorReset);
for (int i = end - 2; i <= end; i++)
std::printf(" %s\n", a[i].data());
} else {
for (int i = start; i <= end; i++)
std::printf(" %s\n", a[i].data());
}
} else if (type == Add) {
std::printf("%s", colorAdd);
for (int i = start; i <= end; i++)
std::printf("+ %s\n", b[i].data());
std::printf("%s", colorReset);
} else if (type == Delete) {
std::printf("%s", colorDelete);
for (int i = start; i <= end; i++)
std::printf("- %s\n", a[i].data());
std::printf("%s", colorReset);
}
}
};
static QList<Unit*> *unitAppend(QList<Unit*> *res, Type type, int pos)
{
if (!res) {
res = new QList<Unit*>;
res->append(new Unit(type, pos));
return res;
}
Unit *last = res->last();
if (last->type == type)
last->end = pos;
else
res->append(new Unit(type, pos));
return res;
}
static QList<Unit*> *diffHelper(int *lcs, QList<QByteArray> a, QList<QByteArray> b, int row, int col)
{
if (row > 0 && col > 0 && (a[row-1] == b[col-1])) {
return unitAppend(diffHelper(lcs, a, b, row - 1, col - 1), Unchanged, row - 1);
} else {
int width = b.size() + 1;
if ((col > 0)
&& (row == 0 || lcs[width * row + col-1] >= lcs[width *(row-1) + col])) {
return unitAppend(diffHelper(lcs, a, b, row, col - 1), Add, col - 1);
} else if ((row > 0)
&& (col == 0 || lcs[width * row + col-1] < lcs[width *(row-1) + col])) {
return unitAppend(diffHelper(lcs, a, b, row - 1, col), Delete, row - 1);
}
}
delete lcs;
return 0;
}
static void diff(QList<QByteArray> a, QList<QByteArray> b)
{
QList<Unit*> *res = diffHelper(lcsLength(a, b), a, b, a.size(), b.size());
for (int i = 0; i < res->size(); i++) {
Unit *unit = res->at(i);
unit->print(a, b);
delete(unit);
}
delete(res);
}
bool FileOut::done()
{
Q_ASSERT(!isDone);
if (name.isEmpty())
return false;
isDone = true;
bool fileEqual = false;
QFile fileRead(name);
QFileInfo info(fileRead);
stream.flush();
QByteArray original;
if (info.exists() && (diff || (info.size() == tmp.size()))) {
if (!fileRead.open(QIODevice::ReadOnly)) {
ReportHandler::warning(QString("failed to open file '%1' for reading")
.arg(fileRead.fileName()));
return false;
}
original = fileRead.readAll();
fileRead.close();
fileEqual = (original == tmp);
}
if (!fileEqual) {
if (!FileOut::dummy) {
QDir dir(info.absolutePath());
if (!dir.mkpath(dir.absolutePath())) {
ReportHandler::warning(QString("unable to create directory '%1'")
.arg(dir.absolutePath()));
return false;
}
QFile fileWrite(name);
if (!fileWrite.open(QIODevice::WriteOnly)) {
ReportHandler::warning(QString("failed to open file '%1' for writing")
.arg(fileWrite.fileName()));
return false;
}
QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8"));
stream.setDevice(&fileWrite);
stream << tmp;
}
if (diff) {
std::printf("%sFile: %s%s\n", colorInfo, qPrintable(name), colorReset);
::diff(original.split('\n'), tmp.split('\n'));
std::printf("\n");
}
return true;
}
return false;
}
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