- assert(OSName.startswith("darwin") && "Unknown darwin target triple!");
-
- // Strip off "darwin".
- OSName = OSName.substr(6);
-
- Maj = Min = Revision = 0;
-
- if (OSName.empty() || OSName[0] < '0' || OSName[0] > '9')
- return;
-
- // The major version is the first digit.
- Maj = EatNumber(OSName);
- if (OSName.empty()) return;
-
- // Handle minor version: 10.4.9 -> darwin8.9.
- if (OSName[0] != '.')
- return;
-
- // Eat the '.'.
- OSName = OSName.substr(1);
-
- if (OSName.empty() || OSName[0] < '0' || OSName[0] > '9')
- return;
-
- Min = EatNumber(OSName);
- if (OSName.empty()) return;
-
- // Handle revision darwin8.9.1
- if (OSName[0] != '.')
- return;
-
- // Eat the '.'.
- OSName = OSName.substr(1);
-
- if (OSName.empty() || OSName[0] < '0' || OSName[0] > '9')
- return;
-
- Revision = EatNumber(OSName);
+
+ // Assume that the OS portion of the triple starts with the canonical name.
+ StringRef OSTypeName = getOSTypeName(getOS());
+ if (OSName.startswith(OSTypeName))
+ OSName = OSName.substr(OSTypeName.size());
+
+ // Any unset version defaults to 0.
+ Major = Minor = Micro = 0;
+
+ // Parse up to three components.
+ unsigned *Components[3] = { &Major, &Minor, &Micro };
+ for (unsigned i = 0; i != 3; ++i) {
+ if (OSName.empty() || OSName[0] < '0' || OSName[0] > '9')
+ break;
+
+ // Consume the leading number.
+ *Components[i] = EatNumber(OSName);
+
+ // Consume the separator, if present.
+ if (OSName.startswith("."))
+ OSName = OSName.substr(1);
+ }