//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/STLExtras.h"
#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
/// there are no tokens in the source string, an empty string is returned.
-/// The Source source string is updated in place to remove the returned string
-/// and any delimiter prefix from it.
-std::string llvm::getToken(std::string &Source, const char *Delimiters) {
- unsigned NumDelimiters = std::strlen(Delimiters);
-
+/// The function returns a pair containing the extracted token and the
+/// remaining tail string.
+std::pair<StringRef, StringRef> llvm::getToken(StringRef Source,
+ StringRef Delimiters) {
// Figure out where the token starts.
- std::string::size_type Start =
- Source.find_first_not_of(Delimiters, 0, NumDelimiters);
- if (Start == std::string::npos) Start = Source.size();
+ StringRef::size_type Start = Source.find_first_not_of(Delimiters);
- // Find the next occurance of the delimiter.
- std::string::size_type End =
- Source.find_first_of(Delimiters, Start, NumDelimiters);
- if (End == std::string::npos) End = Source.size();
+ // Find the next occurrence of the delimiter.
+ StringRef::size_type End = Source.find_first_of(Delimiters, Start);
- // Create the return token.
- std::string Result = std::string(Source.begin()+Start, Source.begin()+End);
-
- // Erase the token that we read in.
- Source.erase(Source.begin(), Source.begin()+End);
+ return std::make_pair(Source.slice(Start, End), Source.substr(End));
+}
- return Result;
+/// SplitString - Split up the specified string according to the specified
+/// delimiters, appending the result fragments to the output list.
+void llvm::SplitString(StringRef Source,
+ SmallVectorImpl<StringRef> &OutFragments,
+ StringRef Delimiters) {
+ std::pair<StringRef, StringRef> S = getToken(Source, Delimiters);
+ while (!S.first.empty()) {
+ OutFragments.push_back(S.first);
+ S = getToken(S.second, Delimiters);
+ }
}