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1 files changed, 50 insertions, 0 deletions

diff --git a/include/cru/common/StringToNumberConverter.h b/include/cru/common/StringToNumberConverter.h
new file mode 100644
index 00000000..e68d12a6
--- /dev/null
+++ b/include/cru/common/StringToNumberConverter.h
@@ -0,0 +1,50 @@
+#pragma once
+#include "Base.h"
+
+namespace cru {
+struct StringToNumberFlags {
+  constexpr static unsigned kNoFlags = 0;
+  constexpr static unsigned kAllowLeadingSpaces = 1 << 0;
+  constexpr static unsigned kAllowTrailingSpaces = 1 << 1;
+  constexpr static unsigned kAllowTrailingJunk = 1 << 2;
+  constexpr static unsigned kAllowLeadingZeroForInteger = 1 << 2;
+  constexpr static unsigned kThrowOnError = 1 << 3;
+};
+
+struct StringToIntegerConverterImplResult {
+  bool negate;
+  unsigned long long value;
+};
+
+/**
+ * \brief A converter that convert number into long long.
+ */
+struct StringToIntegerConverterImpl {
+ public:
+  explicit StringToIntegerConverterImpl(unsigned flags, int base = 0)
+      : flags(flags), base(base) {}
+
+  bool CheckParams() const;
+
+  /**
+   * \brief Convert string to long long.
+   * \param str The string to convert.
+   * \param size The size of the string.
+   * \param processed_characters_count The number of characters that were
+   * processed. Or nullptr to not retrieve.
+   */
+  StringToIntegerConverterImplResult Parse(
+      const char* str, Index size, Index* processed_characters_count) const;
+
+  unsigned flags;
+  /**
+   * \brief The base of the number used for parse or 0 for auto detect.
+   * \remarks Base can only be of range [2, 36] or 0. If base is 0, decimal is
+   * assumed by default ,or if str is started with "0x" or "0X" hexadecimal is
+   * assumed, or if str is started with a single "0" octoral is assumed, or if
+   * str is started with "0b" or "0B" binary is assumed. Otherwise it is an
+   * error.
+   */
+  int base;
+};
+}  // namespace cru