// Returns a whole line containing the current token.
StringRef ScriptParserBase::getLine() {
- StringRef S = currentBuffer().getBuffer();
+ StringRef S = getCurrentMB().getBuffer();
StringRef Tok = Tokens[Pos - 1];
size_t Pos = S.rfind('\n', Tok.data() - S.data());
// Returns 1-based line number of the current token.
size_t ScriptParserBase::getLineNumber() {
- StringRef S = currentBuffer().getBuffer();
+ StringRef S = getCurrentMB().getBuffer();
StringRef Tok = Tokens[Pos - 1];
return S.substr(0, Tok.data() - S.data()).count('\n') + 1;
}
}
std::string ScriptParserBase::getCurrentLocation() {
- std::string Filename = currentBuffer().getBufferIdentifier();
+ std::string Filename = getCurrentMB().getBufferIdentifier();
if (!Pos)
return Filename;
return (Filename + ":" + Twine(getLineNumber())).str();
setError(Expect + " expected, but got " + Tok);
}
-// Returns true if string 'Bigger' contains string 'Shorter'.
-static bool containsString(StringRef Bigger, StringRef Shorter) {
- const char *BiggerEnd = Bigger.data() + Bigger.size();
- const char *ShorterEnd = Shorter.data() + Shorter.size();
-
- return Bigger.data() <= Shorter.data() && BiggerEnd >= ShorterEnd;
+// Returns true if S encloses T.
+static bool encloses(StringRef S, StringRef T) {
+ return S.bytes_begin() <= T.bytes_begin() && T.bytes_end() <= S.bytes_end();
}
-MemoryBufferRef ScriptParserBase::currentBuffer() {
+MemoryBufferRef ScriptParserBase::getCurrentMB() {
// Find input buffer containing the current token.
assert(!MBs.empty());
- if (Pos)
- for (MemoryBufferRef MB : MBs)
- if (containsString(MB.getBuffer(), Tokens[Pos - 1]))
- return MB;
+ if (!Pos)
+ return MBs[0];
- return MBs.front();
+ for (MemoryBufferRef MB : MBs)
+ if (encloses(MB.getBuffer(), Tokens[Pos - 1]))
+ return MB;
+ llvm_unreachable("getCurrentMB: failed to find a token");
}