[DarwinDriver] Increase the number of valid digits for ld64 version string.

Previously only 3 digits were valid. Increase it to 5.

Differential Revision: http://reviews.llvm.org/D18304

rdar://problem/24843016

llvm-svn: 264987

1 files changed, 28 insertions, 0 deletions

diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index a5f9ebbdb15..64903de2945 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -2545,6 +2545,34 @@ bool Driver::GetReleaseVersion(const char *Str, unsigned &Major,
   return true;
 }
 
+/// Parse digits from a string \p Str and fulfill \p Digits with
+/// the parsed numbers. This method assumes that the max number of
+/// digits to look for is equal to Digits.size().
+///
+/// \return True if the entire string was parsed and there are
+/// no extra characters remaining at the end.
+bool Driver::GetReleaseVersion(const char *Str,
+                               MutableArrayRef<unsigned> Digits) {
+  if (*Str == '\0')
+    return false;
+
+  char *End;
+  unsigned CurDigit = 0;
+  while (CurDigit < Digits.size()) {
+    unsigned Digit = (unsigned)strtol(Str, &End, 10);
+    Digits[CurDigit] = Digit;
+    if (*Str != '\0' && *End == '\0')
+      return true;
+    if (*End != '.' || Str == End)
+      return false;
+    Str = End + 1;
+    CurDigit++;
+  }
+
+  // More digits than requested, bail out...
+  return false;
+}
+
 std::pair<unsigned, unsigned> Driver::getIncludeExcludeOptionFlagMasks() const {
   unsigned IncludedFlagsBitmask = 0;
   unsigned ExcludedFlagsBitmask = options::NoDriverOption;