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add a couple of helpers to the Triple class for decoding

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the darwin version string.  This should help consolidate
the variety of weird functions we have scattered around the
codebase that do stuff like this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78792 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-08-12 06:19:40 +00:00
parent e14463832c
commit dfc17f75e8
2 changed files with 80 additions and 0 deletions
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15
include/llvm/ADT/Triple.h
View File

@ -158,6 +158,21 @@ public:
/// if the environment component is present).
StringRef getOSAndEnvironmentName() const;
/// getDarwinNumber - Parse the 'darwin number' out of the specific target
/// triple. For example, if we have darwin8.5 return 8,5,0. If any entry is
/// not defined, return 0's. This requires that the triple have an OSType of
/// darwin before it is called.
void getDarwinNumber(unsigned &Maj, unsigned &Min, unsigned &Revision) const;
/// getDarwinMajorNumber - Return just the major version number, this is
/// specialized because it is a common query.
unsigned getDarwinMajorNumber() const {
unsigned Maj, Min, Rev;
getDarwinNumber(Maj, Min, Rev);
return Maj;
}
/// @}
/// @name Mutators
/// @{

65
lib/Support/Triple.cpp
View File

@ -209,6 +209,71 @@ StringRef Triple::getOSAndEnvironmentName() const {
return Tmp.split('-').second; // Strip second component
}
static unsigned EatNumber(StringRef &Str) {
assert(!Str.empty() && Str[0] >= '0' && Str[0] <= '9' && "Not a number");
unsigned Result = Str[0]-'0';
// Eat the digit.
Str = Str.substr(1);
// Handle "darwin11".
if (Result == 1 && !Str.empty() && Str[0] >= '0' && Str[0] <= '9') {
Result = Result*10 + (Str[0] - '0');
// Eat the digit.
Str = Str.substr(1);
}
return Result;
}
/// getDarwinNumber - Parse the 'darwin number' out of the specific target
/// triple. For example, if we have darwin8.5 return 8,5,0. If any entry is
/// not defined, return 0's. This requires that the triple have an OSType of
/// darwin before it is called.
void Triple::getDarwinNumber(unsigned &Maj, unsigned &Min,
unsigned &Revision) const {
assert(getOS() == Darwin && "Not a darwin target triple!");
StringRef OSName = getOSName();
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);
}
void Triple::setTriple(const Twine &Str) {
Data = Str.str();
Arch = InvalidArch;