#include "llvm/ADT/StringRef.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/LineIterator.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
static cl::alias OutputFilenameA("o", cl::desc("Alias for --output"),
cl::aliasopt(OutputFilename));
-static bool readLine(const char *&Start, const char *End, StringRef &S) {
- if (Start == End)
- return false;
-
- for (const char *I = Start; I != End; ++I) {
- assert(*I && "unexpected binary data");
- if (*I == '\n') {
- S = StringRef(Start, I - Start);
- Start = I + 1;
- return true;
- }
- }
-
- S = StringRef(Start, End - Start);
- Start = End;
- return true;
-}
-
-static StringRef getWord(const char *&Start, const char *End) {
- for (const char *I = Start; I != End; ++I)
- if (*I == ' ') {
- StringRef S(Start, I - Start);
- Start = I + 1;
- return S;
- }
- StringRef S(Start, End - Start);
- Start = End;
- return S;
-}
-
-static size_t splitWords(const StringRef &Line, std::vector<StringRef> &Words) {
- const char *Start = Line.data();
- const char *End = Line.data() + Line.size();
- Words.clear();
- while (Start != End)
- Words.push_back(getWord(Start, End));
- return Words.size();
-}
-
-static bool getNumber(const StringRef &S, uint64_t &N) {
- N = 0;
- for (StringRef::iterator I = S.begin(), E = S.end(); I != E; ++I)
- if (*I >= '0' && *I <= '9')
- N = N * 10 + (*I - '0');
- else
- return false;
-
- return true;
-}
-
static void exitWithError(const std::string &Message,
const std::string &Filename, int64_t Line = -1) {
errs() << "error: " << Filename;
if (!ErrorInfo.empty())
exitWithError(ErrorInfo, OutputFilename);
- const char *Start1 = File1->getBufferStart();
- const char *Start2 = File2->getBufferStart();
- const char *End1 = File1->getBufferEnd();
- const char *End2 = File2->getBufferEnd();
- const char *P1 = Start1;
- const char *P2 = Start2;
-
- StringRef Line1, Line2;
- int64_t Num = 0;
- while (readLine(P1, End1, Line1)) {
- ++Num;
- if (!readLine(P2, End2, Line2))
- exitWithError("truncated file", Filename2, Num);
-
- std::vector<StringRef> Words1, Words2;
- if (splitWords(Line1, Words1) != splitWords(Line2, Words2))
- exitWithError("data mismatch", Filename2, Num);
-
- if (Words1.size() > 2)
- exitWithError("invalid data", Filename1, Num);
-
- if (Words1.empty()) {
+ enum {ReadName, ReadHash, ReadCount, ReadCounters} State = ReadName;
+ uint64_t N1, N2, NumCounters;
+ line_iterator I1(*File1, '#'), I2(*File2, '#');
+ for (; !I1.is_at_end() && !I2.is_at_end(); ++I1, ++I2) {
+ if (I1->empty()) {
+ if (!I2->empty())
+ exitWithError("data mismatch", Filename2, I2.line_number());
Output << "\n";
continue;
}
-
- if (Words1.size() == 2) {
- if (Words1[0] != Words2[0])
- exitWithError("function name mismatch", Filename2, Num);
-
- uint64_t N1, N2;
- if (!getNumber(Words1[1], N1))
- exitWithError("bad function count", Filename1, Num);
- if (!getNumber(Words2[1], N2))
- exitWithError("bad function count", Filename2, Num);
-
+ switch (State) {
+ case ReadName:
+ if (*I1 != *I2)
+ exitWithError("function name mismatch", Filename2, I2.line_number());
+ Output << *I1 << "\n";
+ State = ReadHash;
+ break;
+ case ReadHash:
+ if (I1->getAsInteger(10, N1))
+ exitWithError("bad function hash", Filename1, I1.line_number());
+ if (I2->getAsInteger(10, N2))
+ exitWithError("bad function hash", Filename2, I2.line_number());
if (N1 != N2)
- exitWithError("function count mismatch", Filename2, Num);
-
- Output << Line1 << "\n";
- continue;
+ exitWithError("function hash mismatch", Filename2, I2.line_number());
+ Output << N1 << "\n";
+ State = ReadCount;
+ break;
+ case ReadCount:
+ if (I1->getAsInteger(10, N1))
+ exitWithError("bad function count", Filename1, I1.line_number());
+ if (I2->getAsInteger(10, N2))
+ exitWithError("bad function count", Filename2, I2.line_number());
+ if (N1 != N2)
+ exitWithError("function count mismatch", Filename2, I2.line_number());
+ Output << N1 << "\n";
+ NumCounters = N1;
+ State = ReadCounters;
+ break;
+ case ReadCounters:
+ if (I1->getAsInteger(10, N1))
+ exitWithError("invalid counter", Filename1, I1.line_number());
+ if (I2->getAsInteger(10, N2))
+ exitWithError("invalid counter", Filename2, I2.line_number());
+ uint64_t Sum = N1 + N2;
+ if (Sum < N1)
+ exitWithError("counter overflow", Filename2, I2.line_number());
+ Output << N1 + N2 << "\n";
+ if (--NumCounters == 0)
+ State = ReadName;
+ break;
}
-
- uint64_t N1, N2;
- if (!getNumber(Words1[0], N1))
- exitWithError("invalid counter", Filename1, Num);
- if (!getNumber(Words2[0], N2))
- exitWithError("invalid counter", Filename2, Num);
-
- uint64_t Sum = N1 + N2;
- if (Sum < N1)
- exitWithError("counter overflow", Filename2, Num);
-
- Output << N1 + N2 << "\n";
}
- if (readLine(P2, End2, Line2))
- exitWithError("truncated file", Filename1, Num + 1);
+ if (!I1.is_at_end())
+ exitWithError("truncated file", Filename1, I1.line_number());
+ if (!I2.is_at_end())
+ exitWithError("truncated file", Filename2, I2.line_number());
+ if (State != ReadName)
+ exitWithError("truncated file", Filename1, I1.line_number());
return 0;
}
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