//
//===----------------------------------------------------------------------===//
+#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/StringExtras.h"
+#include "llvm/ADT/StringMap.h"
+#include <algorithm>
using namespace llvm;
static cl::opt<std::string>
//===----------------------------------------------------------------------===//
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;
+
+ /// \brief Contains the number of line this pattern is in.
+ unsigned LineNumber;
+
+ /// 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 ParsePattern(StringRef PatternStr, SourceMgr &SM);
-
+
+ Pattern(bool matchEOF = false) : MatchEOF(matchEOF) { }
+
+ /// ParsePattern - Parse the given string into the Pattern. SM provides the
+ /// SourceMgr used for error reports, and LineNumber is the line number in
+ /// the input file from which the pattern string was read.
+ /// Returns true in case of an error, false otherwise.
+ bool ParsePattern(StringRef PatternStr, SourceMgr &SM, unsigned LineNumber);
+
/// 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 Match(StringRef Buffer, size_t &MatchLen) const;
-
+ ///
+ /// 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:
- void AddFixedStringToRegEx(StringRef FixedStr);
+ 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;
+
+ /// \brief Evaluates expression and stores the result to \p Value.
+ /// \return true on success. false when the expression has invalid syntax.
+ bool EvaluateExpression(StringRef Expr, std::string &Value) const;
};
-bool Pattern::ParsePattern(StringRef PatternStr, SourceMgr &SM) {
+
+bool Pattern::ParsePattern(StringRef PatternStr, SourceMgr &SM,
+ unsigned LineNumber) {
+ this->LineNumber = LineNumber;
+ 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(SMLoc::getFromPointer(PatternStr.data()),
- "found empty check string with prefix '"+CheckPrefix+":'",
- "error");
+ SM.PrintMessage(PatternLoc, SourceMgr::DK_Error,
+ "found empty check string with prefix '" +
+ CheckPrefix+":'");
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) {
+ 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()) {
- // Handle fixed string matches.
- if (PatternStr.size() < 2 ||
- PatternStr[0] != '{' || PatternStr[1] != '{') {
- // Find the end, which is the start of the next regex.
- size_t FixedMatchEnd = PatternStr.find("{{");
- AddFixedStringToRegEx(PatternStr.substr(0, FixedMatchEnd));
- PatternStr = PatternStr.substr(FixedMatchEnd);
+ // RegEx matches.
+ if (PatternStr.startswith("{{")) {
+ // 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()),
+ SourceMgr::DK_Error,
+ "found start of regex string with no end '}}'");
+ 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;
}
-
- // 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;
- }
-
- StringRef RegexStr = PatternStr.substr(2, End-2);
- Regex R(RegexStr);
- std::string Error;
- if (!R.isValid(Error)) {
- SM.PrintMessage(SMLoc::getFromPointer(PatternStr.data()+2),
- "invalid regex: " + Error, "error");
- return true;
+
+ // 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()),
+ SourceMgr::DK_Error,
+ "invalid named regex reference, no ]] found");
+ 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()), SourceMgr::DK_Error,
+ "invalid name in named regex: empty name");
+ return true;
+ }
+
+ // Verify that the name/expression is well formed. FileCheck currently
+ // supports @LINE, @LINE+number, @LINE-number expressions. The check here
+ // is relaxed, more strict check is performed in \c EvaluateExpression.
+ bool IsExpression = false;
+ for (unsigned i = 0, e = Name.size(); i != e; ++i) {
+ if (i == 0 && Name[i] == '@') {
+ if (NameEnd != StringRef::npos) {
+ SM.PrintMessage(SMLoc::getFromPointer(Name.data()),
+ SourceMgr::DK_Error,
+ "invalid name in named regex definition");
+ return true;
+ }
+ IsExpression = true;
+ continue;
+ }
+ if (Name[i] != '_' && !isalnum(Name[i]) &&
+ (!IsExpression || (Name[i] != '+' && Name[i] != '-'))) {
+ SM.PrintMessage(SMLoc::getFromPointer(Name.data()+i),
+ SourceMgr::DK_Error, "invalid name in named regex");
+ return true;
+ }
+ }
+
+ // Name can't start with a digit.
+ if (isdigit(Name[0])) {
+ SM.PrintMessage(SMLoc::getFromPointer(Name.data()), SourceMgr::DK_Error,
+ "invalid name in named regex");
+ 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 += ')';
}
-
- RegExStr += RegexStr.str();
- PatternStr = PatternStr.substr(End+2);
+
+ // 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);
}
return false;
}
-void Pattern::AddFixedStringToRegEx(StringRef FixedStr) {
+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) {
case '[':
case '\\':
case '{':
- RegExStr += '\\';
+ TheStr += '\\';
// FALL THROUGH.
default:
- RegExStr += FixedStr[i];
+ 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()), SourceMgr::DK_Error,
+ "invalid regex: " + Error);
+ return true;
+ }
+
+ RegExStr += RegexStr.str();
+ CurParen += R.getNumMatches();
+ return false;
+}
+
+bool Pattern::EvaluateExpression(StringRef Expr, std::string &Value) const {
+ // The only supported expression is @LINE([\+-]\d+)?
+ if (!Expr.startswith("@LINE"))
+ return false;
+ Expr = Expr.substr(StringRef("@LINE").size());
+ int Offset = 0;
+ if (!Expr.empty()) {
+ if (Expr[0] == '+')
+ Expr = Expr.substr(1);
+ else if (Expr[0] != '-')
+ return false;
+ if (Expr.getAsInteger(10, Offset))
+ return false;
+ }
+ Value = llvm::itostr(LineNumber + Offset);
+ return true;
+}
/// 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) const {
+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) {
+ std::string Value;
+
+ if (VariableUses[i].first[0] == '@') {
+ if (!EvaluateExpression(VariableUses[i].first, Value))
+ return StringRef::npos;
+ } else {
+ 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.
+ 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(RegExStr, Regex::Sub|Regex::Newline).match(Buffer, &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) {
+ SmallString<256> Msg;
+ raw_svector_ostream OS(Msg);
+ StringRef Var = VariableUses[i].first;
+ if (Var[0] == '@') {
+ std::string Value;
+ if (EvaluateExpression(Var, Value)) {
+ OS << "with expression \"";
+ OS.write_escaped(Var) << "\" equal to \"";
+ OS.write_escaped(Value) << "\"";
+ } else {
+ OS << "uses incorrect expression \"";
+ OS.write_escaped(Var) << "\"";
+ }
+ } else {
+ StringMap<StringRef>::const_iterator it = VariableTable.find(Var);
+
+ // 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()), SourceMgr::DK_Note,
+ OS.str());
+ }
+ }
+
+ // 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),
+ SourceMgr::DK_Note, "possible intended match here");
+
+ // 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.
struct CheckString {
/// Pat - The pattern to match.
Pattern Pat;
-
+
/// Loc - The location in the match file that the check string was specified.
SMLoc Loc;
-
+
/// 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) {
- SmallVector<char, 16> NewFile;
+ SmallString<128> 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.
+ // Eliminate trailing dosish \r.
+ if (Ptr <= End - 2 && Ptr[0] == '\r' && Ptr[1] == '\n') {
+ continue;
+ }
+
+ // If current char is not a horizontal whitespace, dump it to output as is.
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());
-
+ 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.
+/// Returns true in case of an error, false otherwise.
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.
StringRef Buffer = F->getBuffer();
-
std::vector<std::pair<SMLoc, Pattern> > NotMatches;
-
+
+ // LineNumber keeps track of the line on which CheckPrefix instances are
+ // found.
+ unsigned LineNumber = 1;
+
while (1) {
// See if Prefix occurs in the memory buffer.
- Buffer = Buffer.substr(Buffer.find(CheckPrefix));
-
+ size_t PrefixLoc = Buffer.find(CheckPrefix);
// If we didn't find a match, we're done.
- if (Buffer.empty())
+ if (PrefixLoc == StringRef::npos)
break;
-
+
+ LineNumber += Buffer.substr(0, PrefixLoc).count('\n');
+
+ Buffer = Buffer.substr(PrefixLoc);
+
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 (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);
+ Buffer = Buffer.substr(CheckPrefix.size()+6);
IsCheckNext = true;
} else if (Buffer.size() > CheckPrefix.size()+5 &&
memcmp(Buffer.data()+CheckPrefix.size(), "-NOT:", 5) == 0) {
- Buffer = Buffer.substr(CheckPrefix.size()+6);
+ Buffer = Buffer.substr(CheckPrefix.size()+5);
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.
Buffer = Buffer.substr(Buffer.find_first_not_of(" \t"));
-
+
// Scan ahead to the end of line.
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))
+ if (P.ParsePattern(Buffer.substr(0, EOL), SM, LineNumber))
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),
+ SourceMgr::DK_Error,
"found '"+CheckPrefix+"-NEXT:' without previous '"+
- CheckPrefix+ ": line", "error");
+ CheckPrefix+ ": line");
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(P,
- SMLoc::getFromPointer(Buffer.data()),
+ 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;
}
-
- if (!NotMatches.empty()) {
- errs() << "error: '" << CheckPrefix
- << "-NOT:' not supported after last check line.\n";
- return true;
- }
-
+
return false;
}
static void PrintCheckFailed(const SourceMgr &SM, const CheckString &CheckStr,
- StringRef Buffer) {
+ 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");
-
+ SM.PrintMessage(CheckStr.Loc, SourceMgr::DK_Error,
+ "expected string not found in input");
+
// 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"));
-
- SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()), "scanning from here",
- "note");
+
+ SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()), SourceMgr::DK_Note,
+ "scanning from here");
+
+ // Allow the pattern to print additional information if desired.
+ CheckStr.Pat.PrintFailureInfo(SM, Buffer, VariableTable);
}
/// CountNumNewlinesBetween - Count the number of newlines in the specified
// 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') &&
cl::ParseCommandLineOptions(argc, argv);
SourceMgr SM;
-
+
// Read the expected strings from the check file.
std::vector<CheckString> CheckStrings;
if (ReadCheckFile(SM, CheckStrings))
return 2;
// 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';
- return true;
+ OwningPtr<MemoryBuffer> File;
+ if (error_code ec =
+ MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), File)) {
+ errs() << "Could not open input file '" << InputFilename << "': "
+ << ec.message() << '\n';
+ return 2;
+ }
+ MemoryBuffer *F = File.take();
+
+ if (F->getBufferSize() == 0) {
+ errs() << "FileCheck error: '" << InputFilename << "' is empty.\n";
+ return 2;
}
// 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.
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.
size_t MatchLen = 0;
- Buffer = Buffer.substr(CheckStr.Pat.Match(Buffer, MatchLen));
-
+ size_t MatchPos = CheckStr.Pat.Match(Buffer, MatchLen, VariableTable);
+ Buffer = Buffer.substr(MatchPos);
+
// If we didn't find a match, reject the input.
- if (Buffer.empty()) {
- PrintCheckFailed(SM, CheckStr, SearchFrom);
+ if (MatchPos == StringRef::npos) {
+ PrintCheckFailed(SM, CheckStr, SearchFrom, VariableTable);
return 1;
}
unsigned NumNewLines = CountNumNewlinesBetween(SkippedRegion);
if (NumNewLines == 0) {
- SM.PrintMessage(CheckStr.Loc,
- CheckPrefix+"-NEXT: is on the same line as previous match",
- "error");
+ SM.PrintMessage(CheckStr.Loc, SourceMgr::DK_Error,
+ CheckPrefix+"-NEXT: is on the same line as previous match");
SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()),
- "'next' match was here", "note");
- SM.PrintMessage(SMLoc::getFromPointer(LastMatch),
- "previous match was here", "note");
+ SourceMgr::DK_Note, "'next' match was here");
+ SM.PrintMessage(SMLoc::getFromPointer(LastMatch), SourceMgr::DK_Note,
+ "previous match was here");
return 1;
}
-
+
if (NumNewLines != 1) {
- SM.PrintMessage(CheckStr.Loc,
- CheckPrefix+
- "-NEXT: is not on the line after the previous match",
- "error");
+ SM.PrintMessage(CheckStr.Loc, SourceMgr::DK_Error, CheckPrefix+
+ "-NEXT: is not on the line after the previous match");
SM.PrintMessage(SMLoc::getFromPointer(Buffer.data()),
- "'next' match was here", "note");
- SM.PrintMessage(SMLoc::getFromPointer(LastMatch),
- "previous match was here", "note");
+ SourceMgr::DK_Note, "'next' match was here");
+ SM.PrintMessage(SMLoc::getFromPointer(LastMatch), SourceMgr::DK_Note,
+ "previous match was here");
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) {
+ 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);
+ 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");
+
+ SM.PrintMessage(SMLoc::getFromPointer(LastMatch+Pos), SourceMgr::DK_Error,
+ CheckPrefix+"-NOT: string occurred!");
+ SM.PrintMessage(CheckStr.NotStrings[ChunkNo].first, SourceMgr::DK_Note,
+ CheckPrefix+"-NOT: pattern specified here");
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