From 7462b5dd99163785480a11a7c999569b349a137c Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Mon, 11 Jan 2010 19:45:18 +0000 Subject: Add StrInStrNoCase, a StringRef version of CStrInCStrNoCase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93174 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Support/StringExtras.cpp | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'lib/Support/StringExtras.cpp') diff --git a/lib/Support/StringExtras.cpp b/lib/Support/StringExtras.cpp index 2363ad60d1..7fd840b0ae 100644 --- a/lib/Support/StringExtras.cpp +++ b/lib/Support/StringExtras.cpp @@ -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 -- cgit v1.2.3-18-g5258