//===-- StringExtras.cpp - Implement the StringExtras header --------------===//
-//
+//
// 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.
+//
//===----------------------------------------------------------------------===//
//
// This file implements the StringExtras.h header
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/SmallVector.h"
+#include <cstring>
using namespace llvm;
/// getToken - This function extracts one token from source, ignoring any
/// 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);
+ size_t NumDelimiters = std::strlen(Delimiters);
// Figure out where the token starts.
std::string::size_type 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 Result;
}
+
+/// SplitString - Split up the specified string according to the specified
+/// delimiters, appending the result fragments to the output list.
+void llvm::SplitString(const std::string &Source,
+ std::vector<std::string> &OutFragments,
+ const char *Delimiters) {
+ std::string S = Source;
+
+ std::string S2 = getToken(S, Delimiters);
+ while (!S2.empty()) {
+ OutFragments.push_back(S2);
+ S2 = getToken(S, Delimiters);
+ }
+}
+
+void llvm::StringRef::split(SmallVectorImpl<StringRef> &A,
+ StringRef Separators, int MaxSplit,
+ bool KeepEmpty) const {
+ StringRef rest = *this;
+
+ // rest.data() is used to distinguish cases like "a," that splits into
+ // "a" + "" and "a" that splits into "a" + 0.
+ for (int splits = 0;
+ rest.data() != NULL && (MaxSplit < 0 || splits < MaxSplit);
+ ++splits) {
+ std::pair<llvm::StringRef, llvm::StringRef> p = rest.split(Separators);
+
+ if (p.first.size() != 0 || KeepEmpty)
+ A.push_back(p.first);
+ rest = p.second;
+ }
+ // If we have a tail left, add it.
+ if (rest.data() != NULL && (rest.size() != 0 || KeepEmpty))
+ A.push_back(rest);
+}