Move UnescapeString to a static function for its sole client; its inefficient and broken.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84358 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 23 insertions, 0 deletions

diff --git a/utils/TableGen/AsmWriterEmitter.cpp b/utils/TableGen/AsmWriterEmitter.cpp
index 84a647bea3..ff348e8e70 100644
--- a/utils/TableGen/AsmWriterEmitter.cpp
+++ b/utils/TableGen/AsmWriterEmitter.cpp
@@ -538,6 +538,29 @@ FindUniqueOperandCommands(std::vector<std::string> &UniqueOperandCommands,
 }
 
 
+static void 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;
+      case '\\': Str[i] = '\\'; break;
+      }
+      // Nuke the second character.
+      Str.erase(Str.begin()+i+1);
+    }
+  }
+}
+
 /// EmitPrintInstruction - Generate the code for the "printInstruction" method
 /// implementation.
 void AsmWriterEmitter::EmitPrintInstruction(raw_ostream &O) {