Added initial Markup, Frame, FrameRect and StrUtil implementations.

2013-10-29 22:39:07 -04:00
parent 336d892983
commit 5f1c2ec3e9
11 changed files with 600 additions and 6 deletions
@@ -0,0 +1,79 @@
+/*  StrUtil.cpp
+ *
+ *  Copyright (C) 2013  Jim Evins <evins@snaught.com>
+ *
+ *  This file is part of gLabels-qt.
+ *
+ *  gLabels-qt is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  gLabels-qt 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 gLabels-qt.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "StrUtil.h"
+
+#include <cmath>
+
+
+namespace
+{
+	const double FRAC_EPSILON = 0.00005;
+	const double denom[]        = {  1.0,  2.0, 3.0,  4.0,  8.0,  16.0,  32.0,  0.0 };
+	const char*  denom_string[] = { "1", "₂", "₃", "₄", "₈", "₁₆", "₃₂", NULL };
+	const char*  num_string[]   = {  "⁰",  "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" };
+}
+namespace libglabels
+{
+
+	namespace StrUtil
+	{
+
+		QString &formatFraction( double x )
+		{
+                        int i;
+                        double product, remainder;
+
+                        for ( i=0; denom[i] != 0.0; i++ )
+                        {
+                                product = x * denom[i];
+                                remainder = fabs(product - ((int)(product+0.5)));
+                                if ( remainder < FRAC_EPSILON ) break;
+                        }
+
+                        if ( denom[i] == 0.0 )
+                        {
+                                /* None of our denominators work. */
+                                return QString().sprintf( "%.5g", x );
+                        }
+                        if ( denom[i] == 1.0 )
+                        {
+                                /* Simple integer. */
+                                return QString().sprintf( "%.0f", x );
+                        }
+                        int n = (int)( x * denom[i] + 0.5 );
+                        int d = (int)denom[i];
+                        if ( n > d )
+                        {
+                                return QString().sprintf( "%d%s/%s", (n/d), num_string[n%d], denom_string[i] );
+                        }
+                        else
+                        {
+                                return QString().sprintf( "%s/%s", num_string[n%d], denom_string[i] );
+                        }
+		}
+
+	}
+
+}
+