1 files changed, 103 insertions, 0 deletions
diff --git a/src/libixion/global.cpp b/src/libixion/global.cpp
new file mode 100644
index 0000000..1100bcb
--- /dev/null
+++ b/src/libixion/global.cpp
@@ -0,0 +1,103 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include "ixion/global.hpp"
+#include "ixion/address.hpp"
+#include "ixion/matrix.hpp"
+#include "ixion/cell.hpp"
+#include "ixion/exceptions.hpp"
+#include "ixion/formula_result.hpp"
+
+#include <iostream>
+#include <cstdlib>
+#include <sstream>
+#include <fstream>
+#include <chrono>
+
+using namespace std;
+
+namespace ixion {
+
+double get_current_time()
+{
+    unsigned long usec_since_epoch =
+        std::chrono::duration_cast<std::chrono::microseconds>(
+            std::chrono::system_clock::now().time_since_epoch()).count();
+
+    return usec_since_epoch / 1000000.0;
+}
+
+double to_double(std::string_view s)
+{
+    const char* p = s.data();
+    std::size_t n = s.size();
+
+    if (!n)
+        return 0.0;
+
+    // First, use the standard C API.
+    const char* p_last_check = p + n;
+    char* p_last;
+    double val = strtod(p, &p_last);
+    if (p_last == p_last_check)
+        return val;
+
+    // If that fails, do the manual conversion, which may introduce rounding
+    // errors.  Revise this to reduce the amount of rounding error.
+    bool dot = false;
+    double frac = 1.0;
+    double sign = 1.0;
+    for (size_t i = 0; i < n; ++i, ++p)
+    {
+        if (i == 0)
+        {
+            if (*p == '+')
+                // Skip this.
+                continue;
+
+            if (*p == '-')
+            {
+                sign = -1.0;
+                continue;
+            }
+        }
+        if (*p == '.')
+        {
+            if (dot)
+                // Second dot is not allowed.
+                break;
+            dot = true;
+            continue;
+        }
+
+        if (*p < '0' || '9' < *p)
+            // not a digit.  End the parse.
+            break;
+
+        int digit = *p - '0';
+        if (dot)
+        {
+            frac *= 0.1;
+            val += digit * frac;
+        }
+        else
+        {
+            val *= 10.0;
+            val += digit;
+        }
+    }
+    return sign*val;
+}
+
+bool to_bool(std::string_view s)
+{
+    return s == "true";
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */