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Add StrInStrNoCase, a StringRef version of CStrInCStrNoCase.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93174 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2010-01-11 19:45:18 +00:00
parent cd1fd251eb
commit 7462b5dd99
2 changed files with 18 additions and 0 deletions
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13
lib/Support/StringExtras.cpp
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@ -16,6 +16,19 @@
#include "llvm/ADT/StringExtras.h"
using namespace llvm;
/// StrInStrNoCase - Portable version of strcasestr. Locates the first
/// occurrence of string 's1' in string 's2', ignoring case. Returns
/// the offset of s2 in s1 or npos if s2 cannot be found.
StringRef::size_type llvm::StrInStrNoCase(StringRef s1, StringRef s2) {
size_t N = s2.size(), M = s1.size();
if (N > M)
return StringRef::npos;
for (size_t i = 0, e = M - N + 1; i != e; ++i)
if (s1.substr(i, N).equals_lower(s2))
return i;
return StringRef::npos;
}
/// getToken - This function extracts one token from source, ignoring any
/// leading characters that appear in the Delimiters string, and ending the
/// token at any of the characters that appear in the Delimiters string. If