Blinker

parse hex value from string
Parent 362c1f4
Stefan Schuermans

Stefan Schuermans commited on 2019-06-09 20:32:19
Showing 2 changed files, with 37 additions and 0 deletions.

src/common/StringParser.cpp
View file @ 268b924
... ... 
@@ -111,6 +111,35 @@ bool StringParser::uintMin(unsigned int min, unsigned int &uint)
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   return uintNo(uint) && uint >= min;
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 }
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+/**
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+ * @brief parse hexadecimal number
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+ * @param[in] digits number of digits to parse
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+ * @param[out] uint number parsed from string
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+ * @return if parsing was successful
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+ */
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+bool StringParser::uintHex(unsigned int digits, unsigned int &uint)
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+{
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+  uint = 0;
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+  for (; digits > 0; --digits) {
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+    if (m_it == m_str.end()) {
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+      return false;
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+    }
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+    char chr = *m_it;
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+    ++m_it;
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+    uint <<= 4;
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+    if (chr >= '0' && chr <= '9') {
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+      uint |= chr - '0';
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+    } else if (chr >= 'A' && chr <= 'F') {
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+      uint |= chr - 'A' + 10;
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+    } else if (chr >= 'a' && chr <= 'f') {
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+      uint |= chr - 'a' + 10;
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+    } else {
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+      return false;
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+    }
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+  }
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+  return true;
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+}
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+
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 /**
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  * @brief parse signed number
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  * @param[out] sint number parsed from string
src/common/StringParser.h
View file @ 268b924
... ... 
@@ -58,6 +58,14 @@ public:
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    */
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   bool uintMin(unsigned int min, unsigned int &uint);
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+  /**
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+   * @brief parse hexadecimal number
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+   * @param[in] digits number of digits to parse
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+   * @param[out] uint number parsed from string
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+   * @return if parsing was successful
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+   */
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+  bool uintHex(unsigned int digits, unsigned int &uint);
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+
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   /**
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    * @brief parse signed number
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    * @param[out] sint number parsed from string
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