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-rw-r--r--src/svg/strip-trailing-zeros.cpp54
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 :