wxString split function

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Ryan Norton
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wxString split function

Post by Ryan Norton » Thu Jul 14, 2005 5:52 pm

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//Split (Tokenize) string at specified intervals
//s == string to split
//retArray == split up string (out)
//cpszExp == expression to split at
//crnStart == start postion to split 
//crnCount == max number of split of strings
//crbCIComp == true if case insensitive
void Split(  const wxString& s, wxArrayString& retArray,  const wxChar* cpszExp,  
                                const size_t& crnStart = 0,    const size_t& crnCount = (size_t)-1, 
                                const bool& crbCIComp = false)
{
    //sanity checks
    wxASSERT_MSG(cpszExp != NULL, wxT("Invalid value for First Param of wxString::Split (cpszExp)"));
//    wxASSERT_MSG(crnCount >= (size_t)-1, wxT("Invalid value for Third Param of wxString::Split (crnCount)"));
  
    retArray.Clear();

    size_t  nOldPos = crnStart,      //Current start position in this string
            nPos = crnStart;      //Current end position in this string 

    wxString szComp,            //this string as-is (if bCIComp is false) or converted to lowercase
             szExp = cpszExp;   //Expression string, normal or lowercase

    if (crbCIComp)
    {
        szComp = s.Lower();
        szExp.MakeLower();
    }
    else
        szComp = s;

    if(crnCount == (size_t)-1)
    {
    for (; (nPos = szComp.find(szExp, nPos)) != wxString::npos;)//Is there another token in the string 
        {
        retArray.Add(Slice(s, nOldPos, nPos)); //Insert the token in the array
        nOldPos = nPos += szExp.Length();//Move up the start slice position
        }
    
    }
    else
    {
    for (int i = crnCount; 
            (nPos = szComp.find(szExp, nPos)) != wxString::npos &&
            i != 0;
                --i)//Is there another token in the string && have we met nCount?
    {
        retArray.Add(Slice(s, nOldPos, nPos)); //Insert the token in the array
        nOldPos = nPos += szExp.Length();//Move up the start slice position
    }
    }
    if (nOldPos != s.Length())
        retArray.Add( Slice(s, nOldPos, s.Length()) ); //Add remaining characters in string
}
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daddydave
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Post by daddydave » Tue Aug 09, 2005 8:23 pm

Handy! I'll probably use this in the first iteration of my current project. (Second iteration will probably store data as XML)

daddydave
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Post by daddydave » Sat Aug 20, 2005 5:44 pm

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retArray.Add(Slice(s, nOldPos, nPos)); //Insert the token in the array 
Where's the Slice function coming from? I don't see it in the wxWidgets docs

daddydave
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Post by daddydave » Sat Aug 20, 2005 6:10 pm

Figured it out. Added this to the top of your code

Code: Select all

#define Slice(str, start, end) (str.Mid(start, end))

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Ryan Norton
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Post by Ryan Norton » Sat Aug 20, 2005 7:59 pm

daddydave wrote:Figured it out. Added this to the top of your code

Code: Select all

#define Slice(str, start, end) (str.Mid(start, end))
Good catch.... it was a function from my sources

Code: Select all

  wxString Slice(const wxString& s, size_t from, size_t to) 
      { return s.Mid(from, (to - from) ); }
[Mostly retired moderator, still check in to clean up some stuff]

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