Add a new (simple) StringMap::clear method, patch by Pratik

[oota-llvm.git] / include / llvm / ADT / StringExtras.h

diff --git a/include/llvm/ADT/StringExtras.h b/include/llvm/ADT/StringExtras.h
index c7df4b6581747970c21dd95fc65241197982ca51..87b8ba6596a18a1d7aab1b2b973cd3354d7ea6a0 100644 (file)
--- a/include/llvm/ADT/StringExtras.h
+++ b/include/llvm/ADT/StringExtras.h
@@ -2,8 +2,8 @@
 //
 //                     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.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -85,6 +85,10 @@ static inline std::string itostr(int64_t X) {
     return utostr(static_cast<uint64_t>(X));
 }
 
+static inline std::string itohexstr(int64_t X) {
+  return utohexstr(static_cast<uint64_t>(X));
+}
+
 static inline std::string ftostr(double V) {
   char Buffer[200];
   sprintf(Buffer, "%20.6e", V);
@@ -98,7 +102,7 @@ static inline std::string ftostr(const APFloat& V) {
     return ftostr(V.convertToDouble());
   else if (&V.getSemantics() == &APFloat::IEEEsingle)
     return ftostr((double)V.convertToFloat());
-  return 0; // error
+  return "<unknown format in ftostr>"; // error
 }
 
 static inline std::string LowercaseString(const std::string &S) {
@@ -109,12 +113,20 @@ static inline std::string LowercaseString(const std::string &S) {
   return result;
 }
 
+static inline std::string UppercaseString(const std::string &S) {
+  std::string result(S);
+  for (unsigned i = 0; i < S.length(); ++i)
+    if (islower(result[i]))
+      result[i] = char(toupper(result[i]));
+  return result;
+}
+
 /// StringsEqualNoCase - Return true if the two strings are equal, ignoring
 /// case.
 static inline bool StringsEqualNoCase(const std::string &LHS, 
                                       const std::string &RHS) {
   if (LHS.size() != RHS.size()) return false;
-  for (unsigned i = 0, e = LHS.size(); i != e; ++i)
+  for (unsigned i = 0, e = static_cast<unsigned>(LHS.size()); i != e; ++i)
     if (tolower(LHS[i]) != tolower(RHS[i])) return false;
   return true;
 }
@@ -123,12 +135,38 @@ static inline bool StringsEqualNoCase(const std::string &LHS,
 /// case.
 static inline bool StringsEqualNoCase(const std::string &LHS, 
                                       const char *RHS) {
-  for (unsigned i = 0, e = LHS.size(); i != e; ++i) {
+  for (unsigned i = 0, e = static_cast<unsigned>(LHS.size()); i != e; ++i) {
     if (RHS[i] == 0) return false;  // RHS too short.
     if (tolower(LHS[i]) != tolower(RHS[i])) return false;
   }
   return RHS[LHS.size()] == 0;  // Not too long?
 }
+  
+/// CStrInCStrNoCase - Portable version of strcasestr.  Locates the first
+///  occurance of c-string 's2' in string 's1', ignoring case.  Returns
+///  NULL if 's2' cannot be found.
+static inline const char* CStrInCStrNoCase(const char *s1, const char *s2) {
+
+  // Are either strings NULL or empty?
+  if (!s1 || !s2 || s1[0] == '\0' || s2[0] == '\0')
+    return 0;
+  
+  if (s1 == s2)
+    return s1;
+  
+  const char *I1=s1, *I2=s2;
+  
+  while (*I1 != '\0' || *I2 != '\0' )
+    if (tolower(*I1) != tolower(*I2)) { // No match.  Start over.
+      ++s1; I1 = s1; I2 = s2;
+    }
+    else { // Character match.  Advance to the next character.
+      ++I1; ++I2;
+    }
+
+  // If we exhausted all of the characters in 's2', then 's2' appears in 's1'.
+  return *I2 == '\0' ? s1 : 0;
+}
 
 /// getToken - This function extracts one token from source, ignoring any
 /// leading characters that appear in the Delimiters string, and ending the