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-rwxr-xr-xCPP/Common/StringToInt.cpp90
1 files changed, 90 insertions, 0 deletions
diff --git a/CPP/Common/StringToInt.cpp b/CPP/Common/StringToInt.cpp
new file mode 100755
index 0000000..77ce7c5
--- /dev/null
+++ b/CPP/Common/StringToInt.cpp
@@ -0,0 +1,90 @@
+// 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 ConvertHexStringToUInt64(const char *s, const char **end)
+{
+ UInt64 result = 0;
+ for (;;)
+ {
+ char c = *s;
+ UInt32 v;
+ if (c >= '0' && c <= '9') v = (c - '0');
+ else if (c >= 'A' && c <= 'F') v = 10 + (c - 'A');
+ else if (c >= 'a' && c <= 'f') v = 10 + (c - 'a');
+ else
+ {
+ if (end != NULL)
+ *end = s;
+ return result;
+ }
+ result <<= 4;
+ result |= v;
+ 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);
+}