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Use hexDigitValue in LLLexer.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172866 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jordan Rose 2013-01-18 23:05:41 +00:00
parent ffd5f9ad60
commit 7336f7febb
1 changed files with 7 additions and 16 deletions
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23
lib/AsmParser/LLLexer.cpp
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@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#include "LLLexer.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Assembly/Parser.h"
#include "llvm/IR/DerivedTypes.h"
@ -55,22 +56,12 @@ uint64_t LLLexer::atoull(const char *Buffer, const char *End) {
return Result;
}
static char parseHexChar(char C) {
if (C >= '0' && C <= '9')
return C-'0';
if (C >= 'A' && C <= 'F')
return C-'A'+10;
if (C >= 'a' && C <= 'f')
return C-'a'+10;
return 0;
}
uint64_t LLLexer::HexIntToVal(const char *Buffer, const char *End) {
uint64_t Result = 0;
for (; Buffer != End; ++Buffer) {
uint64_t OldRes = Result;
Result *= 16;
Result += parseHexChar(*Buffer);
Result += hexDigitValue(*Buffer);
if (Result < OldRes) { // Uh, oh, overflow detected!!!
Error("constant bigger than 64 bits detected!");
@ -86,12 +77,12 @@ void LLLexer::HexToIntPair(const char *Buffer, const char *End,
for (int i=0; i<16; i++, Buffer++) {
assert(Buffer != End);
Pair[0] *= 16;
Pair[0] += parseHexChar(*Buffer);
Pair[0] += hexDigitValue(*Buffer);
}
Pair[1] = 0;
for (int i=0; i<16 && Buffer != End; i++, Buffer++) {
Pair[1] *= 16;
Pair[1] += parseHexChar(*Buffer);
Pair[1] += hexDigitValue(*Buffer);
}
if (Buffer != End)
Error("constant bigger than 128 bits detected!");
@ -105,12 +96,12 @@ void LLLexer::FP80HexToIntPair(const char *Buffer, const char *End,
for (int i=0; i<4 && Buffer != End; i++, Buffer++) {
assert(Buffer != End);
Pair[1] *= 16;
Pair[1] += parseHexChar(*Buffer);
Pair[1] += hexDigitValue(*Buffer);
}
Pair[0] = 0;
for (int i=0; i<16; i++, Buffer++) {
Pair[0] *= 16;
Pair[0] += parseHexChar(*Buffer);
Pair[0] += hexDigitValue(*Buffer);
}
if (Buffer != End)
Error("constant bigger than 128 bits detected!");
@ -129,7 +120,7 @@ static void UnEscapeLexed(std::string &Str) {
*BOut++ = '\\'; // Two \ becomes one
BIn += 2;
} else if (BIn < EndBuffer-2 && isxdigit(BIn[1]) && isxdigit(BIn[2])) {
*BOut = parseHexChar(BIn[1]) * 16 + parseHexChar(BIn[2]);
*BOut = hexDigitValue(BIn[1]) * 16 + hexDigitValue(BIn[2]);
BIn += 3; // Skip over handled chars
++BOut;
} else {