1 files changed, 68 insertions, 0 deletions
diff --git a/CPP/Common/StringToInt.cpp b/CPP/Common/StringToInt.cpp
new file mode 100755
index 00000000..ec6733e3
--- /dev/null
+++ b/CPP/Common/StringToInt.cpp
@@ -0,0 +1,68 @@
+// Common/StringToInt.cpp
+
+#include "StdAfx.h"
+
+#include "StringToInt.h"
+
+UInt64 ConvertStringToUInt64(const char *s, const char **end)
+{
+  UInt64 result = 0;
+  for (;;)
+  {
+    char c = *s;
+    if (c < '0' || c > '9')
+    {
+      if (end != NULL)
+        *end = s;
+      return result;
+    }
+    result *= 10;
+    result += (c - '0');
+    s++;
+  }
+}
+
+UInt64 ConvertOctStringToUInt64(const char *s, const char **end)
+{
+  UInt64 result = 0;
+  for (;;)
+  {
+    char c = *s;
+    if (c < '0' || c > '7')
+    {
+      if (end != NULL)
+        *end = s;
+      return result;
+    }
+    result <<= 3;
+    result += (c - '0');
+    s++;
+  }
+}
+
+
+UInt64 ConvertStringToUInt64(const wchar_t *s, const wchar_t **end)
+{
+  UInt64 result = 0;
+  for (;;)
+  {
+    wchar_t c = *s;
+    if (c < '0' || c > '9')
+    {
+      if (end != NULL)
+        *end = s;
+      return result;
+    }
+    result *= 10;
+    result += (c - '0');
+    s++;
+  }
+}
+
+
+Int64 ConvertStringToInt64(const char *s, const char **end)
+{
+  if (*s == '-')
+    return -(Int64)ConvertStringToUInt64(s + 1, end);
+  return ConvertStringToUInt64(s, end);
+}