[llvm-commits] CVS: llvm/lib/Support/FileUtilities.cpp

[Chris Lattner]

Changes in directory llvm/lib/Support:

FileUtilities.cpp updated: 1.38 -> 1.39
---
Log message:

Fix crash comparing empty file against nonempty file.


---
Diffs of the changes:  (+2 -1)

 FileUtilities.cpp |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)


Index: llvm/lib/Support/FileUtilities.cpp
diff -u llvm/lib/Support/FileUtilities.cpp:1.38 llvm/lib/Support/FileUtilities.cpp:1.39
--- llvm/lib/Support/FileUtilities.cpp:1.38	Sat Jan 22 21:31:02 2005
+++ llvm/lib/Support/FileUtilities.cpp	Sun Jan 23 00:02:40 2005
@@ -93,7 +93,8 @@
 // with a number.  Because of this, if needed, we pad the file so that it starts
 // and ends with a null character.
 static void PadFileIfNeeded(char *&FileStart, char *&FileEnd, char *&FP) {
-  if (isNumberChar(FileStart[0]) || isNumberChar(FileEnd[-1])) {
+  if (FileStart-FileEnd < 2 ||
+      isNumberChar(FileStart[0]) || isNumberChar(FileEnd[-1])) {
     unsigned FileLen = FileEnd-FileStart;
     char *NewFile = new char[FileLen+2];
     NewFile[0] = 0;              // Add null padding