Minor fix due to recent API changes

[oota-llvm.git] / lib / System / Unix / Unix.h

diff --git a/lib/System/Unix/Unix.h b/lib/System/Unix/Unix.h
index 741a817f454439018afeadcef74aac2176d10cd4..4ef38963ffdfcb156dbe9fed74b56372def0e7f0 100644 (file)
--- a/lib/System/Unix/Unix.h
+++ b/lib/System/Unix/Unix.h
@@ -1,10 +1,10 @@
 //===- llvm/System/Unix/Unix.h - Common Unix Include File -------*- C++ -*-===//
-// 
+//
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Reid Spencer and is distributed under the 
+// This file was developed by Reid Spencer and is distributed under the
 // University of Illinois Open Source License. See LICENSE.TXT for details.
-// 
+//
 //===----------------------------------------------------------------------===//
 //
 // This file defines things specific to Unix implementations.
@@ -37,7 +37,7 @@
 
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
-#endif 
+#endif
 
 #ifdef HAVE_ASSERT_H
 #include <assert.h>
@@ -66,28 +66,57 @@
 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
 #endif
 
+inline bool GetErrno(const std::string &prefix, std::string *ErrDest,
+                     int errnum = -1) {
+  char buffer[MAXPATHLEN];
+  
+  if (ErrDest == 0) return true;
+  
+  buffer[0] = 0;
+  if (errnum == -1)
+    errnum = errno;
+#ifdef HAVE_STRERROR_R
+  // strerror_r is thread-safe.
+  if (errnum)
+    strerror_r(errnum, buffer, MAXPATHLEN-1);
+#elif HAVE_STRERROR
+  // Copy the thread un-safe result of strerror into
+  // the buffer as fast as possible to minimize impact
+  // of collision of strerror in multiple threads.
+  if (errnum)
+    strncpy(buffer, strerror(errnum), MAXPATHLEN-1);
+  buffer[MAXPATHLEN-1] = 0;
+#else
+  // Strange that this system doesn't even have strerror
+  // but, oh well, just use a generic message
+  sprintf(buffer, "Error #%d", errnum);
+#endif
+  *ErrDest = prefix + ": " + buffer;
+  return true;
+}
+
 inline void ThrowErrno(const std::string& prefix, int errnum = -1) {
-    char buffer[MAXPATHLEN];
-    buffer[0] = 0;
-    if (errnum == -1)
-      errnum = errno;
+  char buffer[MAXPATHLEN];
+  buffer[0] = 0;
+  if (errnum == -1)
+    errnum = errno;
 #ifdef HAVE_STRERROR_R
-    // strerror_r is thread-safe.
-    if (errnum)
-      strerror_r(errnum,buffer,MAXPATHLEN-1);
+  // strerror_r is thread-safe.
+  if (errnum)
+    strerror_r(errnum,buffer,MAXPATHLEN-1);
 #elif HAVE_STRERROR
-    // Copy the thread un-safe result of strerror into
-    // the buffer as fast as possible to minimize impact
-    // of collision of strerror in multiple threads.
-    if (errnum)
-      strncpy(buffer,strerror(errnum),MAXPATHLEN-1);
-    buffer[MAXPATHLEN-1] = 0;
+  // Copy the thread un-safe result of strerror into
+  // the buffer as fast as possible to minimize impact
+  // of collision of strerror in multiple threads.
+  if (errnum)
+    strncpy(buffer,strerror(errnum),MAXPATHLEN-1);
+  buffer[MAXPATHLEN-1] = 0;
 #else
-    // Strange that this system doesn't even have strerror
-    // but, oh well, just use a generic message
-    sprintf(buffer, "Error #%d", errnum);
+  // Strange that this system doesn't even have strerror
+  // but, oh well, just use a generic message
+  sprintf(buffer, "Error #%d", errnum);
 #endif
-    throw prefix + ": " + buffer;
+  throw prefix + ": " + buffer;
 }
 
 #endif