Refactor: Follow Qt5 module's file directories style

Xlsx Shared library can be used now

src/xlsx/xlsxutility.cpp

@@ -0,0 +1,111 @@
+/****************************************************************************
+** Copyright (c) 2013 Debao Zhang <hello@debao.me>
+** All right reserved.
+**
+** Permission is hereby granted, free of charge, to any person obtaining
+** a copy of this software and associated documentation files (the
+** "Software"), to deal in the Software without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Software, and to
+** permit persons to whom the Software is furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be
+** included in all copies or substantial portions of the Software.
+**
+** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+** NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+** LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+** OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+** WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+**
+****************************************************************************/
+#include "xlsxutility_p.h"
+
+#include <QString>
+#include <QPoint>
+#include <QRegularExpression>
+#include <QMap>
+
+namespace QXlsx {
+
+int intPow(int x, int p)
+{
+  if (p == 0) return 1;
+  if (p == 1) return x;
+
+  int tmp = intPow(x, p/2);
+  if (p%2 == 0) return tmp * tmp;
+  else return x * tmp * tmp;
+}
+
+QPoint xl_cell_to_rowcol(const QString &cell_str)
+{
+    if (cell_str.isEmpty())
+        return QPoint(0, 0);
+    QRegularExpression re("^([A-Z]{1,3})(\\d+)$");
+    QRegularExpressionMatch match = re.match(cell_str);
+    if (match.hasMatch()) {
+        QString col_str = match.captured(1);
+        QString row_str = match.captured(2);
+        int col = 0;
+        int expn = 0;
+        for (int i=col_str.size()-1; i>-1; --i) {
+            col += (col_str[i].unicode() - 'A' + 1) * intPow(26, expn);
+            expn++;
+        }
+
+        col--;
+        int row = row_str.toInt() - 1;
+        return QPoint(row, col);
+    } else {
+        return QPoint(-1, -1); //...
+    }
+}
+
+QString xl_col_to_name(int col_num)
+{
+    col_num += 1; //Change to 1-index
+    QString col_str;
+
+    int remainder;
+    while (col_num) {
+        remainder = col_num % 26;
+        if (remainder == 0)
+            remainder = 26;
+        col_str.prepend(QChar('A'+remainder-1));
+        col_num = (col_num - 1) / 26;
+    }
+
+    return col_str;
+}
+
+QString xl_rowcol_to_cell(int row, int col, bool row_abs, bool col_abs)
+{
+    row += 1; //Change to 1-index
+    QString cell_str;
+    if (col_abs)
+        cell_str.append("$");
+    cell_str.append(xl_col_to_name(col));
+    if (row_abs)
+        cell_str.append("$");
+    cell_str.append(QString::number(row));
+    return cell_str;
+}
+
+QString xl_rowcol_to_cell_fast(int row, int col)
+{
+    static QMap<int, QString> col_cache;
+    QString  col_str;
+    if (col_cache.contains(col)) {
+        col_str = col_cache[col];
+    } else {
+        col_str = xl_col_to_name(col);
+        col_cache[col] = col_str;
+    }
+    return col_str + QString::number(row+1);
+}
+
+} //namespace QXlsx