BE WARNED! Despite my following comments, this still has SERIOUS memory leaks.
Im working on it! AT LAST!
Here is the re-write I promised and Ive turned it into a REAL function, like was originally requested.
Ive spent the whole of today on it (at work hehehe
), and I was willing to spend the time as I'm sure
to need it myself later as I often use that format to store data in other apps/languages (VB#,C#).
The first block of code is THE Function itself, after much work
and research
I believe is close to ready.
Now all I need if some of the experts here to fine tune it a bit.
The Second block is two examples of the code in use, which should be easily copied into a new or existing
project so you can see how it is used. I've supplied an easy version and a "clean" version.
The Function itself if very heavily documented and if I seem to be doing simple things in odd ways, its
just the way I code unfortunately, I seem to have a slightly twisted mind
, and Im only a Lite-C noob.
Enjoy and feel free to ask questions or make suggestions if you need.
PS Many thanks Joozey for clarifying my Garbage collection questions. VERY helpful!!
I now know the Garbage Collection Ive built into this function is necessary, if rather unwieldy.
function string_split(STRING* SourceString)
{
if(str_len(SourceString)==0) return(str_create("0")); //Invalid SourceString
//
char* Delim = ","; // Delimiter to 'split' around
STRING* tmpItem; // Temp String Space used for element building
STRING* TempData = str_create(SourceString); // Temp String used to step through SourceString
///Count Number Of Elements
var ItemCount = 1; //Assume 1 already so no trailing comma needed after last
while(str_len(TempData)>0)
{
ItemCount += str_cmpni(TempData,Delim); //if this byte is a Delimiter, increment ItemCount
str_clip(TempData,1); //remove checked character/byte
}
/// Create Results array, with extra element[0] reserved for ItemCount return
STRING* *ReturnArray = (STRING*)malloc(sizeof(STRING*)*(ItemCount+1));
/// Create Each Element in Results Array - Starting at element[1] because 0 is reserved
TempData = str_create(SourceString);
for(cnt=1;cnt<=ItemCount+1;cnt++)
{
tmpItem=str_create(TempData); //put remaining SourceString proxy into Element
if(str_stri(tmpItem, _str(Delim))>0) //look for next Delimiter
{
str_clip(TempData,str_stri(tmpItem, _str(Delim))); //remove THIS element from SourceString proxy
str_trunc(tmpItem, str_len(tmpItem) - str_stri(tmpItem, _str(Delim)) + 1); //Remove Delimiter and beyond
}
else str_cpy(TempData,""); //Remove rest of SourceString proxy as this element was the last
ReturnArray[cnt] = str_create(tmpItem); //copy "temp" item into Results Array at correct element
str_remove(tmpItem); //flush used "temp" to avoid memory leak
}
//save ItemCount into element[0]. Can be retrieved from Target as follows "XXXXX = str_to_num(MyArray[0]);"
ReturnArray[0] = str_for_num(TempData,ItemCount);
return(ReturnArray);
}
And here is the sample/demo code.
//
//
//Suggested Clean and Safe Usage (to my mind anyway)
...
...
// vvvvvvvv 'STRING**' type is VERY important. Wont work otherwise.
STRING** DataArray = 0; // LOCALLY defined Result Array Pointer
var ArrayLength = 0; // LOCALLY defined Result Array Length storage
...
...
//Valid string from any source
STRING* DataList = "Entry1,Entry2,Entry3,Entry4,Entry5,Entry6,Entry7,Entry8";
...
...
if(DataArray != 0) free(DataArray); //Flush and Free resources from last use if any.
DataArray = string_split("Entry1,Entry2,Entry3,Entry4,Entry5,Entry6,Entry7,Entry8");
ArrayLength = str_to_num(DataArray[0]);
if(ArrayLength == 0) break; // Nothing in string - Do something about it.
...
...
//Do something with Array of Strings.
...
...
free(DataArray); //Release and Free used memory.
//
//
//
//
/////////////////////////////////////////////////////////////////////////////////////////////
//Simplified Usage
// vvvvvvvv 'STRING**' type is VERY important. Wont work otherwise.
STRING** DataArray = string_split("Entry1,Entry2,Entry3,Entry4,Entry5,Entry6,Entry7,Entry8");
var ArrayLength = str_to_num(DataArray[0]);
//
//
///////////// Debugging code - loog in acklog.txt in working folder after running
diag("\n\nDebug Tag--> 'string_split' has decoded ");
diag(str_for_num(tmpStr,ArrayLength)); diag(" elements.\n");
for(cnt=1;cnt<=ArrayLength;cnt++)
{
diag(DataArray[cnt]); diag(" <-\n");
}
///////////// End of Debugging code
//
//Once finished with it empty it as follows
free(DataArray);
//
//
//
