tags:

views:

196

answers:

1
+3  Q: 

Delphi - Differences between CompareStr and CompareString

Hi all,

I'm hoping someone can shed some light on this for me> What are the differences, in Delphi 2009, between the CompareStr (defined in SysUtils) and CompareString (from Windows API) functions?

Both let you specify the locale to be used, is the Windows one simply more "complete", due to the available comparison flags? Is one consequently faster than the other?

Thanks!

+4  A: 

CompareString uses locale information so that things like ae and æ are treated as matches, and sorting is appropriate for the geographical region.

CompareStr('', loInvariantLocale) is just a byte-by-byte comparison of the characters in a string. CompareStr('', loUserLocale) calls CompareString internally, so they're identical, other than the additional flags that CompareString can accept. It's also inlined, so you shouldn't see any difference in speed between it and calling CompareString directly.

Craig Peterson  2010-03-19 00:40:52
Thanks Craig,I wasn't sure since the code (assembly) for CompareStr doesn't reference CompareString - or at least I didn't catch it :o)
Bourgui  2010-03-19 12:41:15

related questions

Does anyone have a good Proper Case algorithm
Converting bool to text in C++
Does PHP have an equivalent to this type of Python string substitution?
PHP ToString() equivalent
What's the difference between a string constant and a string literal?
What would be the fastest way to remove Newlines from a String in C#?
Why is String.Format static?
PowerShell - How do I pass string parameters correctly?
What's the best string concatenation method using C#?
Java: Best way of converting List<Integer> to List<String>
C# String output: format or concat?
Parse usable Street Address, City, State, Zip from a string
C# Save Dialogs
How do I Convert a string to an enum in C#?
PowerShell - how do I do a string replacement in a function?
Case insensitive string comparison in C++
Why doesn't Ruby have a real StringBuffer or StringIO?
Checking for string contents? string Length Vs Empty String
Remove Quotes and Commas from a String in MySQL
Test serialization encoding
In C# what is the difference between String and string
String.indexOf function in C
What is the best way to parse strings in Java
Format string to title case
Generate list of all possible permutations of a string