//
//===----------------------------------------------------------------------===//
+#include "llvm/ADT/OwningPtr.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Regex.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Signals.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/system_error.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringMap.h"
+#include <algorithm>
using namespace llvm;
static cl::opt<std::string>
NoCanonicalizeWhiteSpace("strict-whitespace",
cl::desc("Do not treat all horizontal whitespace as equivalent"));
+//===----------------------------------------------------------------------===//
+// Pattern Handling Code.
+//===----------------------------------------------------------------------===//
+
+class Pattern {
+ SMLoc PatternLoc;
+
+ /// MatchEOF - When set, this pattern only matches the end of file. This is
+ /// used for trailing CHECK-NOTs.
+ bool MatchEOF;
+
+ /// FixedStr - If non-empty, this pattern is a fixed string match with the
+ /// specified fixed string.
+ StringRef FixedStr;
+
+ /// RegEx - If non-empty, this is a regex pattern.
+ std::string RegExStr;
+
+ /// VariableUses - Entries in this vector map to uses of a variable in the
+ /// pattern, e.g. "foo[[bar]]baz". In this case, the RegExStr will contain
+ /// "foobaz" and we'll get an entry in this vector that tells us to insert the
+ /// value of bar at offset 3.
+ std::vector<std::pair<StringRef, unsigned> > VariableUses;
+
+ /// VariableDefs - Entries in this vector map to definitions of a variable in
+ /// the pattern, e.g. "foo[[bar:.*]]baz". In this case, the RegExStr will
+ /// contain "foo(.*)baz" and VariableDefs will contain the pair "bar",1. The
+ /// index indicates what parenthesized value captures the variable value.
+ std::vector<std::pair<StringRef, unsigned> > VariableDefs;
+
+public:
+
+ Pattern(bool matchEOF = false) : MatchEOF(matchEOF) { }
+
+ bool ParsePattern(StringRef PatternStr, SourceMgr &SM);
+
+ /// Match - Match the pattern string against the input buffer Buffer. This
+ /// returns the position that is matched or npos if there is no match. If
+ /// there is a match, the size of the matched string is returned in MatchLen.
+ ///
+ /// The VariableTable StringMap provides the current values of filecheck
+ /// variables and is updated if this match defines new values.
+ size_t Match(StringRef Buffer, size_t &MatchLen,
+ StringMap<StringRef> &VariableTable) const;
+
+ /// PrintFailureInfo - Print additional information about a failure to match
+ /// involving this pattern.
+ void PrintFailureInfo(const SourceMgr &SM, StringRef Buffer,
+ const StringMap<StringRef> &VariableTable) const;
+
+private:
+ static void AddFixedStringToRegEx(StringRef FixedStr, std::string &TheStr);
+ bool AddRegExToRegEx(StringRef RegExStr, unsigned &CurParen, SourceMgr &SM);
+
+ /// ComputeMatchDistance - Compute an arbitrary estimate for the quality of
+ /// matching this pattern at the start of \arg Buffer; a distance of zero
+ /// should correspond to a perfect match.
+ unsigned ComputeMatchDistance(StringRef Buffer,
+ const StringMap<StringRef> &VariableTable) const;
+};
+
+
+bool Pattern::ParsePattern(StringRef PatternStr, SourceMgr &SM) {
+ PatternLoc = SMLoc::getFromPointer(PatternStr.data());
+
+ // Ignore trailing whitespace.
+ while (!PatternStr.empty() &&
+ (PatternStr.back() == ' ' || PatternStr.back() == '\t'))
+ PatternStr = PatternStr.substr(0, PatternStr.size()-1);
+
+ // Check that there is something on the line.
+ if (PatternStr.empty()) {
+ SM.PrintMessage(PatternLoc, "found empty check string with prefix '" +
+ CheckPrefix+":'", "error");
+ return true;
+ }
+
+ // Check to see if this is a fixed string, or if it has regex pieces.
+ if (PatternStr.size() < 2 ||
+ (PatternStr.find("{{") == StringRef::npos &&
+ PatternStr.find("[[") == StringRef::npos)) {
+ FixedStr = PatternStr;
+ return false;
+ }
+
+ // Paren value #0 is for the fully matched string. Any new parenthesized
+ // values add from there.
+ unsigned CurParen = 1;
+
+ // Otherwise, there is at least one regex piece. Build up the regex pattern
+ // by escaping scary characters in fixed strings, building up one big regex.
+ while (!PatternStr.empty()) {
+ // RegEx matches.
+ if (PatternStr.startswith("{{")) {
+
+ // Otherwise, this is the start of a regex match. Scan for the }}.
+ size_t End = PatternStr.find("}}");
+ if (End == StringRef::npos) {
+ SM.PrintMessage(SMLoc::getFromPointer(PatternStr.data()),
+ "found start of regex string with no end '}}'","error");
+ return true;
+ }
+
+ // Enclose {{}} patterns in parens just like [[]] even though we're not
+ // capturing the result for any purpose. This is required in case the
+ // expression contains an alternation like: CHECK: abc{{x|z}}def. We
+ // want this to turn into: "abc(x|z)def" not "abcx|zdef".
+ RegExStr += '(';
+ ++CurParen;
+
+ if (AddRegExToRegEx(PatternStr.substr(2, End-2), CurParen, SM))
+ return true;
+ RegExStr += ')';
+
+ PatternStr = PatternStr.substr(End+2);
+ continue;
+ }
+
+ // Named RegEx matches. These are of two forms: [[foo:.*]] which matches .*
+ // (or some other regex) and assigns it to the FileCheck variable 'foo'. The
+ // second form is [[foo]] which is a reference to foo. The variable name
+ // itself must be of the form "[a-zA-Z_][0-9a-zA-Z_]*", otherwise we reject
+ // it. This is to catch some common errors.
+ if (PatternStr.startswith("[[")) {
+ // Verify that it is terminated properly.
+ size_t End = PatternStr.find("]]");
+ if (End == StringRef::npos) {
+ SM.PrintMessage(SMLoc::getFromPointer(PatternStr.data()),
+ "invalid named regex reference, no ]] found", "error");
+ return true;
+ }
+
+ StringRef MatchStr = PatternStr.substr(2, End-2);
+ PatternStr = PatternStr.substr(End+2);
+
+ // Get the regex name (e.g. "foo").
+ size_t NameEnd = MatchStr.find(':');
+ StringRef Name = MatchStr.substr(0, NameEnd);
+
+ if (Name.empty()) {
+ SM.PrintMessage(SMLoc::getFromPointer(Name.data()),
+ "invalid name in named regex: empty name", "error");
+ return true;
+ }
+
+ // Verify that the name is well formed.
+ for (unsigned i = 0, e = Name.size(); i != e; ++i)
+ if (Name[i] != '_' && !isalnum(Name[i])) {
+ SM.PrintMessage(SMLoc::getFromPointer(Name.data()+i),
+ "invalid name in named regex", "error");
+ return true;
+ }
+
+ // Name can't start with a digit.
+ if (isdigit(Name[0])) {
+ SM.PrintMessage(SMLoc::getFromPointer(Name.data()),
+ "invalid name in named regex", "error");
+ return true;
+ }
+
+ // Handle [[foo]].
+ if (NameEnd == StringRef::npos) {
+ VariableUses.push_back(std::make_pair(Name, RegExStr.size()));
+ continue;
+ }
+
+ // Handle [[foo:.*]].
+ VariableDefs.push_back(std::make_pair(Name, CurParen));
+ RegExStr += '(';
+ ++CurParen;
+
+ if (AddRegExToRegEx(MatchStr.substr(NameEnd+1), CurParen, SM))
+ return true;
+
+ RegExStr += ')';
+ }
+
+ // Handle fixed string matches.
+ // Find the end, which is the start of the next regex.
+ size_t FixedMatchEnd = PatternStr.find("{{");
+ FixedMatchEnd = std::min(FixedMatchEnd, PatternStr.find("[["));
+ AddFixedStringToRegEx(PatternStr.substr(0, FixedMatchEnd), RegExStr);
+ PatternStr = PatternStr.substr(FixedMatchEnd);
+ continue;
+ }
+
+ return false;
+}
+
+void Pattern::AddFixedStringToRegEx(StringRef FixedStr, std::string &TheStr) {
+ // Add the characters from FixedStr to the regex, escaping as needed. This
+ // avoids "leaning toothpicks" in common patterns.
+ for (unsigned i = 0, e = FixedStr.size(); i != e; ++i) {
+ switch (FixedStr[i]) {
+ // These are the special characters matched in "p_ere_exp".
+ case '(':
+ case ')':
+ case '^':
+ case '$':
+ case '|':
+ case '*':
+ case '+':
+ case '?':
+ case '.':
+ case '[':
+ case '\\':
+ case '{':
+ TheStr += '\\';
+ // FALL THROUGH.
+ default:
+ TheStr += FixedStr[i];
+ break;
+ }
+ }
+}
+
+bool Pattern::AddRegExToRegEx(StringRef RegexStr, unsigned &CurParen,
+ SourceMgr &SM) {
+ Regex R(RegexStr);
+ std::string Error;
+ if (!R.isValid(Error)) {
+ SM.PrintMessage(SMLoc::getFromPointer(RegexStr.data()),
+ "invalid regex: " + Error, "error");
+ return true;
+ }
+
+ RegExStr += RegexStr.str();
+ CurParen += R.getNumMatches();
+ return false;
+}
+
+/// Match - Match the pattern string against the input buffer Buffer. This
+/// returns the position that is matched or npos if there is no match. If
+/// there is a match, the size of the matched string is returned in MatchLen.
+size_t Pattern::Match(StringRef Buffer, size_t &MatchLen,
+ StringMap<StringRef> &VariableTable) const {
+ // If this is the EOF pattern, match it immediately.
+ if (MatchEOF) {
+ MatchLen = 0;
+ return Buffer.size();
+ }
+
+ // If this is a fixed string pattern, just match it now.
+ if (!FixedStr.empty()) {
+ MatchLen = FixedStr.size();
+ return Buffer.find(FixedStr);
+ }
+
+ // Regex match.
+
+ // If there are variable uses, we need to create a temporary string with the
+ // actual value.
+ StringRef RegExToMatch = RegExStr;
+ std::string TmpStr;
+ if (!VariableUses.empty()) {
+ TmpStr = RegExStr;
+
+ unsigned InsertOffset = 0;
+ for (unsigned i = 0, e = VariableUses.size(); i != e; ++i) {
+ StringMap<StringRef>::iterator it =
+ VariableTable.find(VariableUses[i].first);
+ // If the variable is undefined, return an error.
+ if (it == VariableTable.end())
+ return StringRef::npos;
+
+ // Look up the value and escape it so that we can plop it into the regex.
+ std::string Value;
+ AddFixedStringToRegEx(it->second, Value);
+
+ // Plop it into the regex at the adjusted offset.
+ TmpStr.insert(TmpStr.begin()+VariableUses[i].second+InsertOffset,
+ Value.begin(), Value.end());
+ InsertOffset += Value.size();
+ }
+
+ // Match the newly constructed regex.
+ RegExToMatch = TmpStr;
+ }
+
+
+ SmallVector<StringRef, 4> MatchInfo;
+ if (!Regex(RegExToMatch, Regex::Newline).match(Buffer, &MatchInfo))
+ return StringRef::npos;
+
+ // Successful regex match.
+ assert(!MatchInfo.empty() && "Didn't get any match");
+ StringRef FullMatch = MatchInfo[0];
+
+ // If this defines any variables, remember their values.
+ for (unsigned i = 0, e = VariableDefs.size(); i != e; ++i) {
+ assert(VariableDefs[i].second < MatchInfo.size() &&
+ "Internal paren error");
+ VariableTable[VariableDefs[i].first] = MatchInfo[VariableDefs[i].second];
+ }
+
+ MatchLen = FullMatch.size();
+ return FullMatch.data()-Buffer.data();
+}
+
+unsigned Pattern::ComputeMatchDistance(StringRef Buffer,
+ const StringMap<StringRef> &VariableTable) const {
+ // Just compute the number of matching characters. For regular expressions, we
+ // just compare against the regex itself and hope for the best.
+ //
+ // FIXME: One easy improvement here is have the regex lib generate a single
+ // example regular expression which matches, and use that as the example
+ // string.
+ StringRef ExampleString(FixedStr);
+ if (ExampleString.empty())
+ ExampleString = RegExStr;
+
+ // Only compare up to the first line in the buffer, or the string size.
+ StringRef BufferPrefix = Buffer.substr(0, ExampleString.size());
+ BufferPrefix = BufferPrefix.split('\n').first;
+ return BufferPrefix.edit_distance(ExampleString);
+}
+
+void Pattern::PrintFailureInfo(const SourceMgr &SM, StringRef Buffer,
+ const StringMap<StringRef> &VariableTable) const{
+ // If this was a regular expression using variables, print the current
+ // variable values.
+ if (!VariableUses.empty()) {
+ for (unsigned i = 0, e = VariableUses.size(); i != e; ++i) {
+ StringRef Var = VariableUses[i].first;
+ StringMap<StringRef>::const_iterator it = VariableTable.find(Var);
+ SmallString<256> Msg;
+ raw_svector_ostream OS(Msg);
+
+ // Check for undefined variable references.
+ if (it == VariableTable.end()) {
+ OS << "uses undefined variable \"";
+ OS.write_escaped(Var) << "\"";;
+ } else {
+ OS << "with variable \"";
+ OS.write_escaped(Var) << "\" equal to \"";
+ OS.write_escaped(it->second) << "\"";
+ }
+
+ SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()), OS.str(), "note",
+ ArrayRef<SMRange>(), /*ShowLine=*/false);
+ }
+ }
+
+ // Attempt to find the closest/best fuzzy match. Usually an error happens
+ // because some string in the output didn't exactly match. In these cases, we
+ // would like to show the user a best guess at what "should have" matched, to
+ // save them having to actually check the input manually.
+ size_t NumLinesForward = 0;
+ size_t Best = StringRef::npos;
+ double BestQuality = 0;
+
+ // Use an arbitrary 4k limit on how far we will search.
+ for (size_t i = 0, e = std::min(size_t(4096), Buffer.size()); i != e; ++i) {
+ if (Buffer[i] == '\n')
+ ++NumLinesForward;
+
+ // Patterns have leading whitespace stripped, so skip whitespace when
+ // looking for something which looks like a pattern.
+ if (Buffer[i] == ' ' || Buffer[i] == '\t')
+ continue;
+
+ // Compute the "quality" of this match as an arbitrary combination of the
+ // match distance and the number of lines skipped to get to this match.
+ unsigned Distance = ComputeMatchDistance(Buffer.substr(i), VariableTable);
+ double Quality = Distance + (NumLinesForward / 100.);
+
+ if (Quality < BestQuality || Best == StringRef::npos) {
+ Best = i;
+ BestQuality = Quality;
+ }
+ }
+
+ // Print the "possible intended match here" line if we found something
+ // reasonable and not equal to what we showed in the "scanning from here"
+ // line.
+ if (Best && Best != StringRef::npos && BestQuality < 50) {
+ SM.PrintMessage(SMLoc::getFromPointer(Buffer.data() + Best),
+ "possible intended match here", "note");
+
+ // FIXME: If we wanted to be really friendly we would show why the match
+ // failed, as it can be hard to spot simple one character differences.
+ }
+}
+
+//===----------------------------------------------------------------------===//
+// Check Strings.
+//===----------------------------------------------------------------------===//
+
/// CheckString - This is a check that we found in the input file.
struct CheckString {
- /// Str - The string to match.
- std::string Str;
-
+ /// Pat - The pattern to match.
+ Pattern Pat;
+
/// Loc - The location in the match file that the check string was specified.
SMLoc Loc;
-
- CheckString(const std::string &S, SMLoc L) : Str(S), Loc(L) {}
+
+ /// IsCheckNext - This is true if this is a CHECK-NEXT: directive (as opposed
+ /// to a CHECK: directive.
+ bool IsCheckNext;
+
+ /// NotStrings - These are all of the strings that are disallowed from
+ /// occurring between this match string and the previous one (or start of
+ /// file).
+ std::vector<std::pair<SMLoc, Pattern> > NotStrings;
+
+ CheckString(const Pattern &P, SMLoc L, bool isCheckNext)
+ : Pat(P), Loc(L), IsCheckNext(isCheckNext) {}
};
+/// CanonicalizeInputFile - Remove duplicate horizontal space from the specified
+/// memory buffer, free it, and return a new one.
+static MemoryBuffer *CanonicalizeInputFile(MemoryBuffer *MB) {
+ SmallString<128> NewFile;
+ NewFile.reserve(MB->getBufferSize());
-/// FindFixedStringInBuffer - This works like strstr, except for two things:
-/// 1) it handles 'nul' characters in memory buffers. 2) it returns the end of
-/// the memory buffer on match failure instead of null.
-static const char *FindFixedStringInBuffer(StringRef Str, const char *CurPtr,
- const MemoryBuffer &MB) {
- assert(!Str.empty() && "Can't find an empty string");
- const char *BufEnd = MB.getBufferEnd();
-
- while (1) {
- // Scan for the first character in the match string.
- CurPtr = (char*)memchr(CurPtr, Str[0], BufEnd-CurPtr);
-
- // If we didn't find the first character of the string, then we failed to
- // match.
- if (CurPtr == 0) return BufEnd;
-
- // If the match string is one character, then we win.
- if (Str.size() == 1) return CurPtr;
-
- // Otherwise, verify that the rest of the string matches.
- if (Str.size() <= unsigned(BufEnd-CurPtr) &&
- memcmp(CurPtr+1, Str.data()+1, Str.size()-1) == 0)
- return CurPtr;
-
- // If not, advance past this character and try again.
- ++CurPtr;
+ for (const char *Ptr = MB->getBufferStart(), *End = MB->getBufferEnd();
+ Ptr != End; ++Ptr) {
+ // Eliminate trailing dosish \r.
+ if (Ptr <= End - 2 && Ptr[0] == '\r' && Ptr[1] == '\n') {
+ continue;
+ }
+
+ // If C is not a horizontal whitespace, skip it.
+ if (*Ptr != ' ' && *Ptr != '\t') {
+ NewFile.push_back(*Ptr);
+ continue;
+ }
+
+ // Otherwise, add one space and advance over neighboring space.
+ NewFile.push_back(' ');
+ while (Ptr+1 != End &&
+ (Ptr[1] == ' ' || Ptr[1] == '\t'))
+ ++Ptr;
}
+
+ // Free the old buffer and return a new one.
+ MemoryBuffer *MB2 =
+ MemoryBuffer::getMemBufferCopy(NewFile.str(), MB->getBufferIdentifier());
+
+ delete MB;
+ return MB2;
}
+
/// ReadCheckFile - Read the check file, which specifies the sequence of
/// expected strings. The strings are added to the CheckStrings vector.
static bool ReadCheckFile(SourceMgr &SM,
std::vector<CheckString> &CheckStrings) {
// Open the check file, and tell SourceMgr about it.
- std::string ErrorStr;
- MemoryBuffer *F =
- MemoryBuffer::getFileOrSTDIN(CheckFilename.c_str(), &ErrorStr);
- if (F == 0) {
- errs() << "Could not open check file '" << CheckFilename << "': "
- << ErrorStr << '\n';
+ OwningPtr<MemoryBuffer> File;
+ if (error_code ec =
+ MemoryBuffer::getFileOrSTDIN(CheckFilename.c_str(), File)) {
+ errs() << "Could not open check file '" << CheckFilename << "': "
+ << ec.message() << '\n';
return true;
}
+ MemoryBuffer *F = File.take();
+
+ // If we want to canonicalize whitespace, strip excess whitespace from the
+ // buffer containing the CHECK lines.
+ if (!NoCanonicalizeWhiteSpace)
+ F = CanonicalizeInputFile(F);
+
SM.AddNewSourceBuffer(F, SMLoc());
// Find all instances of CheckPrefix followed by : in the file.
- const char *CurPtr = F->getBufferStart(), *BufferEnd = F->getBufferEnd();
+ StringRef Buffer = F->getBuffer();
+
+ std::vector<std::pair<SMLoc, Pattern> > NotMatches;
while (1) {
// See if Prefix occurs in the memory buffer.
- const char *Ptr = FindFixedStringInBuffer(CheckPrefix, CurPtr, *F);
-
+ Buffer = Buffer.substr(Buffer.find(CheckPrefix));
+
// If we didn't find a match, we're done.
- if (Ptr == BufferEnd)
+ if (Buffer.empty())
break;
-
+
+ const char *CheckPrefixStart = Buffer.data();
+
+ // When we find a check prefix, keep track of whether we find CHECK: or
+ // CHECK-NEXT:
+ bool IsCheckNext = false, IsCheckNot = false;
+
// Verify that the : is present after the prefix.
- if (Ptr[CheckPrefix.size()] != ':') {
- CurPtr = Ptr+1;
+ if (Buffer[CheckPrefix.size()] == ':') {
+ Buffer = Buffer.substr(CheckPrefix.size()+1);
+ } else if (Buffer.size() > CheckPrefix.size()+6 &&
+ memcmp(Buffer.data()+CheckPrefix.size(), "-NEXT:", 6) == 0) {
+ Buffer = Buffer.substr(CheckPrefix.size()+7);
+ IsCheckNext = true;
+ } else if (Buffer.size() > CheckPrefix.size()+5 &&
+ memcmp(Buffer.data()+CheckPrefix.size(), "-NOT:", 5) == 0) {
+ Buffer = Buffer.substr(CheckPrefix.size()+6);
+ IsCheckNot = true;
+ } else {
+ Buffer = Buffer.substr(1);
continue;
}
-
+
// Okay, we found the prefix, yay. Remember the rest of the line, but
// ignore leading and trailing whitespace.
- Ptr += CheckPrefix.size()+1;
-
- while (*Ptr == ' ' || *Ptr == '\t')
- ++Ptr;
-
+ Buffer = Buffer.substr(Buffer.find_first_not_of(" \t"));
+
// Scan ahead to the end of line.
- CurPtr = Ptr;
- while (CurPtr != BufferEnd && *CurPtr != '\n' && *CurPtr != '\r')
- ++CurPtr;
-
- // Ignore trailing whitespace.
- while (CurPtr[-1] == ' ' || CurPtr[-1] == '\t')
- --CurPtr;
-
- // Check that there is something on the line.
- if (Ptr >= CurPtr) {
- SM.PrintMessage(SMLoc::getFromPointer(CurPtr),
- "found empty check string with prefix '"+CheckPrefix+":'",
- "error");
+ size_t EOL = Buffer.find_first_of("\n\r");
+
+ // Remember the location of the start of the pattern, for diagnostics.
+ SMLoc PatternLoc = SMLoc::getFromPointer(Buffer.data());
+
+ // Parse the pattern.
+ Pattern P;
+ if (P.ParsePattern(Buffer.substr(0, EOL), SM))
+ return true;
+
+ Buffer = Buffer.substr(EOL);
+
+
+ // Verify that CHECK-NEXT lines have at least one CHECK line before them.
+ if (IsCheckNext && CheckStrings.empty()) {
+ SM.PrintMessage(SMLoc::getFromPointer(CheckPrefixStart),
+ "found '"+CheckPrefix+"-NEXT:' without previous '"+
+ CheckPrefix+ ": line", "error");
return true;
}
-
+
+ // Handle CHECK-NOT.
+ if (IsCheckNot) {
+ NotMatches.push_back(std::make_pair(SMLoc::getFromPointer(Buffer.data()),
+ P));
+ continue;
+ }
+
+
// Okay, add the string we captured to the output vector and move on.
- CheckStrings.push_back(CheckString(std::string(Ptr, CurPtr),
- SMLoc::getFromPointer(Ptr)));
+ CheckStrings.push_back(CheckString(P,
+ PatternLoc,
+ IsCheckNext));
+ std::swap(NotMatches, CheckStrings.back().NotStrings);
}
-
+
+ // Add an EOF pattern for any trailing CHECK-NOTs.
+ if (!NotMatches.empty()) {
+ CheckStrings.push_back(CheckString(Pattern(true),
+ SMLoc::getFromPointer(Buffer.data()),
+ false));
+ std::swap(NotMatches, CheckStrings.back().NotStrings);
+ }
+
if (CheckStrings.empty()) {
errs() << "error: no check strings found with prefix '" << CheckPrefix
<< ":'\n";
return true;
}
-
+
return false;
}
-// CanonicalizeCheckStrings - Replace all sequences of horizontal whitespace in
-// the check strings with a single space.
-static void CanonicalizeCheckStrings(std::vector<CheckString> &CheckStrings) {
- for (unsigned i = 0, e = CheckStrings.size(); i != e; ++i) {
- std::string &Str = CheckStrings[i].Str;
-
- for (unsigned C = 0; C != Str.size(); ++C) {
- // If C is not a horizontal whitespace, skip it.
- if (Str[C] != ' ' && Str[C] != '\t')
- continue;
-
- // Replace the character with space, then remove any other space
- // characters after it.
- Str[C] = ' ';
-
- while (C+1 != Str.size() &&
- (Str[C+1] == ' ' || Str[C+1] == '\t'))
- Str.erase(Str.begin()+C+1);
- }
- }
-}
+static void PrintCheckFailed(const SourceMgr &SM, const CheckString &CheckStr,
+ StringRef Buffer,
+ StringMap<StringRef> &VariableTable) {
+ // Otherwise, we have an error, emit an error message.
+ SM.PrintMessage(CheckStr.Loc, "expected string not found in input",
+ "error");
-/// CanonicalizeInputFile - Remove duplicate horizontal space from the specified
-/// memory buffer, free it, and return a new one.
-static MemoryBuffer *CanonicalizeInputFile(MemoryBuffer *MB) {
- SmallVector<char, 16> NewFile;
- NewFile.reserve(MB->getBufferSize());
-
- for (const char *Ptr = MB->getBufferStart(), *End = MB->getBufferEnd();
- Ptr != End; ++Ptr) {
- // If C is not a horizontal whitespace, skip it.
- if (*Ptr != ' ' && *Ptr != '\t') {
- NewFile.push_back(*Ptr);
- continue;
- }
-
- // Otherwise, add one space and advance over neighboring space.
- NewFile.push_back(' ');
- while (Ptr+1 != End &&
- (Ptr[1] == ' ' || Ptr[1] == '\t'))
- ++Ptr;
- }
-
- // Free the old buffer and return a new one.
- MemoryBuffer *MB2 =
- MemoryBuffer::getMemBufferCopy(NewFile.data(),
- NewFile.data() + NewFile.size(),
- MB->getBufferIdentifier());
+ // Print the "scanning from here" line. If the current position is at the
+ // end of a line, advance to the start of the next line.
+ Buffer = Buffer.substr(Buffer.find_first_not_of(" \t\n\r"));
- delete MB;
- return MB2;
+ SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()), "scanning from here",
+ "note");
+
+ // Allow the pattern to print additional information if desired.
+ CheckStr.Pat.PrintFailureInfo(SM, Buffer, VariableTable);
}
+/// CountNumNewlinesBetween - Count the number of newlines in the specified
+/// range.
+static unsigned CountNumNewlinesBetween(StringRef Range) {
+ unsigned NumNewLines = 0;
+ while (1) {
+ // Scan for newline.
+ Range = Range.substr(Range.find_first_of("\n\r"));
+ if (Range.empty()) return NumNewLines;
+
+ ++NumNewLines;
+
+ // Handle \n\r and \r\n as a single newline.
+ if (Range.size() > 1 &&
+ (Range[1] == '\n' || Range[1] == '\r') &&
+ (Range[0] != Range[1]))
+ Range = Range.substr(1);
+ Range = Range.substr(1);
+ }
+}
int main(int argc, char **argv) {
sys::PrintStackTraceOnErrorSignal();
cl::ParseCommandLineOptions(argc, argv);
SourceMgr SM;
-
+
// Read the expected strings from the check file.
std::vector<CheckString> CheckStrings;
if (ReadCheckFile(SM, CheckStrings))
return 2;
- // Remove duplicate spaces in the check strings if requested.
- if (!NoCanonicalizeWhiteSpace)
- CanonicalizeCheckStrings(CheckStrings);
-
// Open the file to check and add it to SourceMgr.
- std::string ErrorStr;
- MemoryBuffer *F =
- MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), &ErrorStr);
- if (F == 0) {
- errs() << "Could not open input file '" << InputFilename << "': "
- << ErrorStr << '\n';
+ OwningPtr<MemoryBuffer> File;
+ if (error_code ec =
+ MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), File)) {
+ errs() << "Could not open input file '" << InputFilename << "': "
+ << ec.message() << '\n';
return true;
}
+ MemoryBuffer *F = File.take();
+
+ if (F->getBufferSize() == 0) {
+ errs() << "FileCheck error: '" << InputFilename << "' is empty.\n";
+ return 1;
+ }
// Remove duplicate spaces in the input file if requested.
if (!NoCanonicalizeWhiteSpace)
F = CanonicalizeInputFile(F);
-
+
SM.AddNewSourceBuffer(F, SMLoc());
-
+
+ /// VariableTable - This holds all the current filecheck variables.
+ StringMap<StringRef> VariableTable;
+
// Check that we have all of the expected strings, in order, in the input
// file.
- const char *CurPtr = F->getBufferStart(), *BufferEnd = F->getBufferEnd();
-
+ StringRef Buffer = F->getBuffer();
+
+ const char *LastMatch = Buffer.data();
+
for (unsigned StrNo = 0, e = CheckStrings.size(); StrNo != e; ++StrNo) {
const CheckString &CheckStr = CheckStrings[StrNo];
-
+
+ StringRef SearchFrom = Buffer;
+
// Find StrNo in the file.
- const char *Ptr = FindFixedStringInBuffer(CheckStr.Str, CurPtr, *F);
-
- // If we found a match, we're done, move on.
- if (Ptr != BufferEnd) {
- CurPtr = Ptr + CheckStr.Str.size();
- continue;
+ size_t MatchLen = 0;
+ size_t MatchPos = CheckStr.Pat.Match(Buffer, MatchLen, VariableTable);
+ Buffer = Buffer.substr(MatchPos);
+
+ // If we didn't find a match, reject the input.
+ if (MatchPos == StringRef::npos) {
+ PrintCheckFailed(SM, CheckStr, SearchFrom, VariableTable);
+ return 1;
}
-
- // Otherwise, we have an error, emit an error message.
- SM.PrintMessage(CheckStr.Loc, "expected string not found in input",
- "error");
-
- // Print the "scanning from here" line. If the current position is at the
- // end of a line, advance to the start of the next line.
- const char *Scan = CurPtr;
- while (Scan != BufferEnd &&
- (*Scan == ' ' || *Scan == '\t'))
- ++Scan;
- if (*Scan == '\n' || *Scan == '\r')
- CurPtr = Scan+1;
-
-
- SM.PrintMessage(SMLoc::getFromPointer(CurPtr), "scanning from here",
- "note");
- return 1;
+
+ StringRef SkippedRegion(LastMatch, Buffer.data()-LastMatch);
+
+ // If this check is a "CHECK-NEXT", verify that the previous match was on
+ // the previous line (i.e. that there is one newline between them).
+ if (CheckStr.IsCheckNext) {
+ // Count the number of newlines between the previous match and this one.
+ assert(LastMatch != F->getBufferStart() &&
+ "CHECK-NEXT can't be the first check in a file");
+
+ unsigned NumNewLines = CountNumNewlinesBetween(SkippedRegion);
+ if (NumNewLines == 0) {
+ SM.PrintMessage(CheckStr.Loc,
+ CheckPrefix+"-NEXT: is on the same line as previous match",
+ "error");
+ SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()),
+ "'next' match was here", "note");
+ SM.PrintMessage(SMLoc::getFromPointer(LastMatch),
+ "previous match was here", "note");
+ return 1;
+ }
+
+ if (NumNewLines != 1) {
+ SM.PrintMessage(CheckStr.Loc,
+ CheckPrefix+
+ "-NEXT: is not on the line after the previous match",
+ "error");
+ SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()),
+ "'next' match was here", "note");
+ SM.PrintMessage(SMLoc::getFromPointer(LastMatch),
+ "previous match was here", "note");
+ return 1;
+ }
+ }
+
+ // If this match had "not strings", verify that they don't exist in the
+ // skipped region.
+ for (unsigned ChunkNo = 0, e = CheckStr.NotStrings.size();
+ ChunkNo != e; ++ChunkNo) {
+ size_t MatchLen = 0;
+ size_t Pos = CheckStr.NotStrings[ChunkNo].second.Match(SkippedRegion,
+ MatchLen,
+ VariableTable);
+ if (Pos == StringRef::npos) continue;
+
+ SM.PrintMessage(SMLoc::getFromPointer(LastMatch+Pos),
+ CheckPrefix+"-NOT: string occurred!", "error");
+ SM.PrintMessage(CheckStr.NotStrings[ChunkNo].first,
+ CheckPrefix+"-NOT: pattern specified here", "note");
+ return 1;
+ }
+
+
+ // Otherwise, everything is good. Step over the matched text and remember
+ // the position after the match as the end of the last match.
+ Buffer = Buffer.substr(MatchLen);
+ LastMatch = Buffer.data();
}
-
+
return 0;
}
projects / oota-llvm.git / blobdiff