Added HexToInt function and unit tests for it.

[xestiacalendar/.git] / source / common / text.cpp

diff --git a/source/common/text.cpp b/source/common/text.cpp
index df64411..d223993 100644 (file)
--- a/source/common/text.cpp
+++ b/source/common/text.cpp
@@ -185,4 +185,75 @@ PropertyNameValue SplitNameValue(string InputData){
        
        return FinalNameValue;
        
+}
+
+bool HexToInt(std::string *HexString, int *Number){
+       
+       // Check that each character in the string is a number
+       // or a letter (a-f/A-F).
+       
+       char Char = 0;
+       int CharNum = 0;
+       
+       for (int CharSeek = 0; 
+               CharSeek < HexString->size(); CharSeek++){
+               
+               // Check if character is a number (0-9).
+                       
+               Char = HexString->at(CharSeek);
+               CharNum = Char;
+                       
+               if (CharNum >= 48 &&
+                       CharNum <= 57){
+               
+                       continue;
+                               
+               }
+               
+               // Check if character is a letter (A-F)
+               
+               if (CharNum >= 65 &&
+                       CharNum <= 70){
+               
+                       continue;
+                               
+               }
+               
+               // Check if character is a letter (a-f).
+
+               if (CharNum >= 97 &&
+                       CharNum <= 102){
+               
+                       continue;
+                               
+               }
+               
+               // Exit from subroutine as character is invalid.
+               
+               return false;
+               
+       }
+       
+       // Convert a Hex value that is in string to integer.
+       
+       try {
+       
+               *Number = stoi((*HexString), nullptr, 16);
+       
+       }
+       
+       catch (const std::invalid_argument &err){
+               
+               return false;
+               
+       }
+       
+       catch (const std::out_of_range &err){
+               
+               return false;
+               
+       }
+       
+       return true;
+       
 }
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