[llvm-commits] [llvm] r50821 - /llvm/trunk/include/llvm/ADT/StringExtras.h
Ted Kremenek
kremenek at apple.com
Wed May 7 11:35:46 PDT 2008
Author: kremenek
Date: Wed May 7 13:35:46 2008
New Revision: 50821
URL: http://llvm.org/viewvc/llvm-project?rev=50821&view=rev
Log:
Added CStrInCStrNoCase, a portable implementation of strcasestr.
Modified:
llvm/trunk/include/llvm/ADT/StringExtras.h
Modified: llvm/trunk/include/llvm/ADT/StringExtras.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/StringExtras.h?rev=50821&r1=50820&r2=50821&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/StringExtras.h (original)
+++ llvm/trunk/include/llvm/ADT/StringExtras.h Wed May 7 13:35:46 2008
@@ -141,6 +141,30 @@
}
return RHS[LHS.size()] == 0; // Not too long?
}
+
+/// CStrInCStrNoCase - Portable version of strcasestr. Locates the first
+/// occurance of c-string 's1' in string 's2', ignoring case. Returns
+/// NULL if 's1' cannot be found.
+static inline const char* CStrInCStrNoCase(const char *s1, const char *s2) {
+
+ // Are either strings NULL?
+ if (!s1 || !s2)
+ return 0;
+
+ const char *I1=s1, *I2=s2;
+
+ while (*I1 != '\0' || *I2 != '\0' )
+ if (tolower(*I1) != tolower(*I2)) { // No match. Start over.
+ ++s1; I1 = s1; I2 = s2;
+ }
+ else { // Character match. Advance to the next character.
+ ++I1; ++I2;
+ }
+
+ // If we exhausted all of the characters in 's2', then 's1' does not occur
+ // in it.
+ return *I2 == '\0' ? 0 : I1;
+}
/// getToken - This function extracts one token from source, ignoring any
/// leading characters that appear in the Delimiters string, and ending the
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