1 files changed, 77 insertions, 0 deletions
diff --git a/src/util/format_size.cpp b/src/util/format_size.cpp
new file mode 100644
index 0000000..58b553a
--- /dev/null
+++ b/src/util/format_size.cpp
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "format_size.h"
+#include <glibmm/ustring.h>
+#include <sstream>
+
+namespace Inkscape {
+namespace Util {
+
+Glib::ustring format_size(std::size_t value) {
+    if (!value) {
+        return Glib::ustring("0");
+    }
+
+    typedef std::vector<char> Digits;
+    typedef std::vector<Digits *> Groups;
+
+    Groups groups;
+
+    Digits *digits;
+
+    while (value) {
+        unsigned places=3;
+        digits = new Digits();
+        digits->reserve(places);
+
+        while ( value && places ) {
+            digits->push_back('0' + (char)( value % 10 ));
+            value /= 10;
+            --places;
+        }
+
+        groups.push_back(digits);
+    }
+
+    Glib::ustring temp;
+
+    while (true) {
+        digits = groups.back();
+        while (!digits->empty()) {
+            temp.append(1, digits->back());
+            digits->pop_back();
+        }
+        delete digits;
+
+        groups.pop_back();
+        if (groups.empty()) {
+            break;
+        }
+
+        temp.append(",");
+    }
+
+    return temp;
+}
+
+Glib::ustring format_file_size(std::size_t value) {
+    std::ostringstream ost;
+    if (value < 1024) {
+        ost << value << " B";
+    }
+    else {
+        double size = value;
+        int index = 0;
+        do {
+            size /= 1024;
+            ++index;
+        } while (size > 1024);
+
+        static const char* unit[] = {"", "k", "M", "G", "T", "P", "E", "Z", "Y"};
+        ost.precision(1);
+        ost << std::fixed << size << ' ' << unit[index] << 'B';
+    }
+    return ost.str();
+}
+
+}} // namespace