[llvm-commits] [llvm] r143880 - in /llvm/trunk: include/llvm/ADT/StringRef.h lib/Support/StringRef.cpp

[Daniel Dunbar]

Author: ddunbar
Date: Sun Nov  6 12:04:43 2011
New Revision: 143880

URL: http://llvm.org/viewvc/llvm-project?rev=143880&view=rev
Log:
ADT/StringRef: Add ::lower() and ::upper() methods.

Modified:
    llvm/trunk/include/llvm/ADT/StringRef.h
    llvm/trunk/lib/Support/StringRef.cpp

Modified: llvm/trunk/include/llvm/ADT/StringRef.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/StringRef.h?rev=143880&r1=143879&r2=143880&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/StringRef.h (original)
+++ llvm/trunk/include/llvm/ADT/StringRef.h Sun Nov  6 12:04:43 2011
@@ -327,6 +327,16 @@
     bool getAsInteger(unsigned Radix, APInt &Result) const;
 
     /// @}
+    /// @name String Operations
+    /// @{
+
+    // lower - Convert the given ASCII string to lowercase.
+    std::string lower() const;
+
+    /// upper - Convert the given ASCII string to uppercase.
+    std::string upper() const;
+
+    /// @}
     /// @name Substring Operations
     /// @{
 

Modified: llvm/trunk/lib/Support/StringRef.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/StringRef.cpp?rev=143880&r1=143879&r2=143880&view=diff
==============================================================================
--- llvm/trunk/lib/Support/StringRef.cpp (original)
+++ llvm/trunk/lib/Support/StringRef.cpp Sun Nov  6 12:04:43 2011
@@ -25,6 +25,12 @@
   return x;
 }
 
+static char ascii_toupper(char x) {
+  if (x >= 'a' && x <= 'z')
+    return x - 'a' + 'A';
+  return x;
+}
+
 static bool ascii_isdigit(char x) {
   return x >= '0' && x <= '9';
 }
@@ -132,6 +138,26 @@
 }
 
 //===----------------------------------------------------------------------===//
+// String Operations
+//===----------------------------------------------------------------------===//
+
+std::string StringRef::lower() const {
+  std::string Result(size(), char());
+  for (size_type i = 0, e = size(); i != e; ++i) {
+    Result[i] = ascii_tolower(Data[i]);
+  }
+  return Result;
+}
+
+std::string StringRef::upper() const {
+  std::string Result(size(), char());
+  for (size_type i = 0, e = size(); i != e; ++i) {
+    Result[i] = ascii_tolower(Data[i]);
+  }
+  return Result;
+}
+
+//===----------------------------------------------------------------------===//
 // String Searching
 //===----------------------------------------------------------------------===//