[DGD] case conversion

[Par Winzell]

DGD strings are copy-on-write...

string lower_case(string str) {
  int i;

  for (i = 0; i < strlen(str); i ++) {
    if (str[i] >= 'A' && str[i] <= 'Z') {
      str[i] = (str[i] - 'A' + 'a');
    }
  }
  return str;
}

On Tue, 2004-01-06 at 15:39, Robert Forshaw wrote:
> My case conversion function doesn't work.
> 
> string lower_case(string str)
> {
> 	string ch;
> 	int count, len;
> 
> 	if(str == nil || str == "") return "";
> 
> 	len = strlen(str);
> 
> 	for(count = 0; count < len; ch[0] = str[count++])
> 	{
> 		if(ch[0] > 64 && ch[0] < 97) str[count] = ch[0] + 32;
> 	}
> 
> 	return str;
> }
> 
> I've observed (incorrectly?) that the only way to refer to a char rather 
> than a string is to refer to an element of a string (all other drivers I've 
> seen return a string with a single char). I'm assuming that you can also 
> manipulate and compare a char as if it were an 8 bit integer, in order to 
> modify its case. Are these assumptions correct? Incidently, the lower_case() 
> function gets the following error:
> "Index on bad type".
> 
> Any help would be appreciated.
> 
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