Program options class.

llvm-svn: 235

1 files changed, 138 insertions, 0 deletions

diff --git a/llvm/support/lib/Support/ProgramOption.cpp b/llvm/support/lib/Support/ProgramOption.cpp
new file mode 100644
index 00000000000..2fa987941be
--- /dev/null
+++ b/llvm/support/lib/Support/ProgramOption.cpp
@@ -0,0 +1,138 @@
+// $Id$
+//***************************************************************************
+//
+// File:
+//    ProgramOption.C
+//
+// Purpose:
+//    General representations for a program option.
+//
+// History:
+//    08/08/95 - adve  - created in the dHPF compiler
+//    11/26/96 - adve  - EvalOpt now returns #args consumed, or -1 for error
+//    07/15/01 - vadve - Copied to LLVM system and modified
+//
+//**************************************************************************/
+
+//************************** System Include Files **************************/
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string>
+
+//*************************** User Include Files ***************************/
+
+#include "llvm/Support/ProgramOption.h"
+
+//********************** Local Variable Definitions ************************/
+
+//************************ Class Implementations ***************************/
+
+
+//**************************************************************************/
+
+StringOption::StringOption(const char* _argString,
+			   const char* _helpMesg,
+			   const char* _initValue, 
+			   bool _append)
+  : ProgramOption(_argString, _helpMesg),
+    value(_initValue),
+    append(_append) 
+{}
+
+int
+StringOption::EvalOpt(const char* optarg)
+{
+  if (optarg == (char*) NULL)
+    return -1;			// flag the error
+  
+  if (this->append)
+    value += optarg;
+  else
+    value = optarg;
+  
+  optionSpecified = true;
+  return 1;				// one additional argument consumed
+}
+
+
+//**************************************************************************/
+
+FlagOption::FlagOption(const char* _argString,
+		       const char* _helpMesg,
+		       bool _initValue)
+  : ProgramOption(_argString, _helpMesg, 0),
+    value(_initValue)
+{}
+
+int
+FlagOption::EvalOpt(const char* optarg)
+{
+  if (strcmp(optarg, "0") == 0) {
+    value = false;
+    return 1;				// one additional argument consumed
+  }
+  else {
+    value = true; 
+    return 0;				// zero ... consumed
+  }
+}
+
+//**************************************************************************/
+
+RealValuedOption::RealValuedOption(const char* _argString,
+				   const char* _helpMesg,
+				   double _initValue)
+  : ProgramOption(_argString, _helpMesg),
+    value(_initValue)
+{}
+
+int
+RealValuedOption::EvalOpt(const char* optarg)
+{
+  if (optarg == (char*) NULL)
+    return -1;
+    
+  char* lastCharScanned = NULL;
+  value = strtod(optarg, &lastCharScanned);
+  if (! (*lastCharScanned == '\0'))	// look for incorrect or partially
+    return -1;				// correct numerical argument
+  
+  optionSpecified = true;
+  return 1;
+}
+
+char*
+RealValuedOption::GetTextValue() const
+{
+  char buffer[40];
+  sprintf(buffer, "%f", value);
+  return strdup(buffer);
+}
+
+//**************************************************************************/
+
+IntegerValuedOption::IntegerValuedOption(const char* _argString,
+					 const char* _helpMesg,
+					 int _initValue)
+  : RealValuedOption(_argString, _helpMesg, (double) _initValue)
+{}
+
+int
+IntegerValuedOption::Value() const
+{
+  double realValue = RealValuedOption::Value();
+  assert(realValue == (int) realValue);
+  return (int) realValue;
+}
+
+char*
+IntegerValuedOption::GetTextValue() const
+{
+  char buffer[40];
+  sprintf(buffer, "%d", Value());
+  return strdup(buffer);
+}
+
+//**************************************************************************/