//
//===----------------------------------------------------------------------===//
+#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
-#include <cstring>
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) {
- size_t 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();
-
- // 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();
+ StringRef::size_type Start = Source.find_first_not_of(Delimiters);
- // Create the return token.
- std::string Result = std::string(Source.begin()+Start, Source.begin()+End);
+ // Find the next occurrence of the delimiter.
+ StringRef::size_type End = Source.find_first_of(Delimiters, Start);
- // Erase the token that we read in.
- Source.erase(Source.begin(), Source.begin()+End);
-
- return Result;
+ return std::make_pair(Source.slice(Start, End), Source.substr(End));
}
/// 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);
- }
-}
-
-
-
-/// UnescapeString - Modify the argument string, turning two character sequences
-/// @verbatim
-/// like '\\' 'n' into '\n'. This handles: \e \a \b \f \n \r \t \v \' \ and
-/// \num (where num is a 1-3 byte octal value).
-/// @endverbatim
-void llvm::UnescapeString(std::string &Str) {
- for (unsigned i = 0; i != Str.size(); ++i) {
- if (Str[i] == '\\' && i != Str.size()-1) {
- switch (Str[i+1]) {
- default: continue; // Don't execute the code after the switch.
- case 'a': Str[i] = '\a'; break;
- case 'b': Str[i] = '\b'; break;
- case 'e': Str[i] = 27; break;
- case 'f': Str[i] = '\f'; break;
- case 'n': Str[i] = '\n'; break;
- case 'r': Str[i] = '\r'; break;
- case 't': Str[i] = '\t'; break;
- case 'v': Str[i] = '\v'; break;
- case '\'': Str[i] = '\''; break;
- case '\\': Str[i] = '\\'; break;
- }
- // Nuke the second character.
- Str.erase(Str.begin()+i+1);
- }
- }
-}
-
-/// EscapeString - Modify the argument string, turning '\\' and anything that
-/// doesn't satisfy std::isprint into an escape sequence.
-void llvm::EscapeString(std::string &Str) {
- for (unsigned i = 0; i != Str.size(); ++i) {
- if (Str[i] == '\\') {
- ++i;
- Str.insert(Str.begin()+i, '\\');
- } else if (Str[i] == '\t') {
- Str[i++] = '\\';
- Str.insert(Str.begin()+i, 't');
- } else if (Str[i] == '\n') {
- Str[i++] = '\\';
- Str.insert(Str.begin()+i, 'n');
- } else if (!std::isprint(Str[i])) {
- // Always expand to a 3-digit octal escape.
- unsigned Char = Str[i];
- Str[i++] = '\\';
- Str.insert(Str.begin()+i++, '0'+((Char/64) & 7));
- Str.insert(Str.begin()+i++, '0'+((Char/8) & 7));
- Str.insert(Str.begin()+i , '0'+( Char & 7));
- }
+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);
}
}
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