1 files changed, 54 insertions, 0 deletions
diff --git a/src/svg/strip-trailing-zeros.cpp b/src/svg/strip-trailing-zeros.cpp
new file mode 100644
index 0000000..8abe4fa
--- /dev/null
+++ b/src/svg/strip-trailing-zeros.cpp
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <cstring>
+#include <string>
+#include <glib.h>
+
+#include "svg/strip-trailing-zeros.h"
+
+std::string
+strip_trailing_zeros(std::string str)
+{
+    std::string::size_type p_ix = str.find('.');
+    if (p_ix != std::string::npos) {
+        std::string::size_type e_ix = str.find('e', p_ix);
+        /* N.B. In some contexts (e.g. CSS) it is an error for a number to contain `e'.  fixme:
+         * Default to avoiding `e', e.g. using sprintf(str, "%17f", d).  Add a new function that
+         * allows use of `e' and use that function only where the spec allows it.
+         */
+        std::string::size_type nz_ix = str.find_last_not_of('0', (e_ix == std::string::npos
+                                                                  ? e_ix
+                                                                  : e_ix - 1));
+        if (nz_ix == std::string::npos || nz_ix < p_ix || nz_ix >= e_ix) {
+            g_error("have `.' but couldn't find non-0");
+        } else {
+            str.erase(str.begin() + (nz_ix == p_ix
+                                     ? p_ix
+                                     : nz_ix + 1),
+                      (e_ix == std::string::npos
+                       ? str.end()
+                       : str.begin() + e_ix));
+        }
+    }
+    return str;
+}
+
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :