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Add llvm::hexdigit to StringExtras (number -> hexadecimal char)

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57536 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2008-10-14 23:26:20 +00:00
parent 13739433d0
commit c9debfbf06
1 changed files with 7 additions and 4 deletions
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11
include/llvm/ADT/StringExtras.h
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@ -23,6 +23,12 @@
namespace llvm {
/// hexdigit - Return the (uppercase) hexadecimal character for the
/// given number \arg X (which should be less than 16).
static inline char hexdigit(unsigned X) {
return X < 10 ? '0' + X : 'A' + X - 10;
}
static inline std::string utohexstr(uint64_t X) {
char Buffer[40];
char *BufPtr = Buffer+39;
@ -32,10 +38,7 @@ static inline std::string utohexstr(uint64_t X) {
while (X) {
unsigned char Mod = static_cast<unsigned char>(X) & 15;
if (Mod < 10)
*--BufPtr = '0' + Mod;
else
*--BufPtr = 'A' + Mod-10;
*--BufPtr = hexdigit(Mod);
X >>= 4;
}
return std::string(BufPtr);