diff options
Diffstat (limited to 'src/shared/proparser/qmakeparser.cpp')
| -rw-r--r-- | src/shared/proparser/qmakeparser.cpp | 54 |
1 files changed, 30 insertions, 24 deletions
diff --git a/src/shared/proparser/qmakeparser.cpp b/src/shared/proparser/qmakeparser.cpp index 59dc289548c..7751265e916 100644 --- a/src/shared/proparser/qmakeparser.cpp +++ b/src/shared/proparser/qmakeparser.cpp @@ -221,7 +221,7 @@ ProFile *QMakeParser::parsedProFile(const QString &fileName, ParseFlags flags) } ProFile *QMakeParser::parsedProBlock( - const QString &contents, const QString &name, int line, SubGrammar grammar) + const QStringRef &contents, const QString &name, int line, SubGrammar grammar) { ProFile *pro = new ProFile(name); read(pro, contents, line, grammar); @@ -244,7 +244,7 @@ bool QMakeParser::read(ProFile *pro, ParseFlags flags) fL1S("Cannot read %1: %2").arg(pro->fileName(), errStr)); return false; } - read(pro, content, 1, FullGrammar); + read(pro, QStringRef(&content), 1, FullGrammar); return true; } @@ -272,7 +272,8 @@ void QMakeParser::putHashStr(ushort *&pTokPtr, const ushort *buf, uint len) *tokPtr++ = (ushort)hash; *tokPtr++ = (ushort)(hash >> 16); *tokPtr++ = (ushort)len; - memcpy(tokPtr, buf, len * 2); + if (len) // buf may be nullptr; don't pass that to memcpy (-> undefined behavior) + memcpy(tokPtr, buf, len * 2); pTokPtr = tokPtr + len; } @@ -285,7 +286,7 @@ void QMakeParser::finalizeHashStr(ushort *buf, uint len) buf[-2] = (ushort)(hash >> 16); } -void QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar grammar) +void QMakeParser::read(ProFile *pro, const QStringRef &in, int line, SubGrammar grammar) { m_proFile = pro; m_lineNo = line; @@ -295,27 +296,30 @@ void QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra // Worst-case size calculations: // - line marker adds 1 (2-nl) to 1st token of each line // - empty assignment "A=":2 => - // TokHashLiteral(1) + hash(2) + len(1) + "A"(1) + TokAssign(1) + 0(1) + + // TokHashLiteral(1) + hash(2) + len(1) + "A"(1) + TokAssign(1) + size_hint(1) + // TokValueTerminator(1) == 8 (9) // - non-empty assignment "A=B C":5 => - // TokHashLiteral(1) + hash(2) + len(1) + "A"(1) + TokAssign(1) + 2(1) + + // TokHashLiteral(1) + hash(2) + len(1) + "A"(1) + TokAssign(1) + size_hint(1) + // TokLiteral(1) + len(1) + "B"(1) + // TokLiteral(1) + len(1) + "C"(1) + TokValueTerminator(1) == 14 (15) // - variable expansion: "$$f":3 => // TokVariable(1) + hash(2) + len(1) + "f"(1) = 5 // - function expansion: "$$f()":5 => // TokFuncName(1) + hash(2) + len(1) + "f"(1) + TokFuncTerminator(1) = 6 + // - test literal: "X":1 => + // TokHashLiteral(1) + hash(2) + len(1) + "A"(1) + TokCondition(1) = 6 (7) // - scope: "X:":2 => // TokHashLiteral(1) + hash(2) + len(1) + "A"(1) + TokCondition(1) + - // TokBranch(1) + len(2) + ... + len(2) + ... == 10 - // - test: "X():":4 => + // TokBranch(1) + len(2) + ... + len(2) + ... == 11 (12) + // - test call: "X():":4 => // TokHashLiteral(1) + hash(2) + len(1) + "A"(1) + TokTestCall(1) + TokFuncTerminator(1) + - // TokBranch(1) + len(2) + ... + len(2) + ... == 11 + // TokBranch(1) + len(2) + ... + len(2) + ... == 12 (13) // - "for(A,B):":9 => // TokForLoop(1) + hash(2) + len(1) + "A"(1) + // len(2) + TokLiteral(1) + len(1) + "B"(1) + TokValueTerminator(1) + // len(2) + ... + TokTerminator(1) == 14 (15) - tokBuff.reserve((in.size() + 1) * 5); + // One extra for possibly missing trailing newline. + tokBuff.reserve((in.size() + 1) * 7); ushort *tokPtr = (ushort *)tokBuff.constData(); // Current writing position // Expression precompiler buffer. @@ -330,8 +334,8 @@ void QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra QStack<ParseCtx> xprStack; xprStack.reserve(10); - // We rely on QStrings being null-terminated, so don't maintain a global end pointer. const ushort *cur = (const ushort *)in.unicode(); + const ushort *inend = cur + in.length(); m_canElse = false; freshLine: m_state = StNew; @@ -414,7 +418,7 @@ void QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra int indent; if (context == CtxPureValue) { - end = (const ushort *)in.unicode() + in.length(); + end = inend; cptr = 0; lineCont = false; indent = 0; // just gcc being stupid @@ -426,24 +430,30 @@ void QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra // First, skip leading whitespace for (indent = 0; ; ++cur, ++indent) { + if (cur == inend) { + cur = 0; + goto flushLine; + } c = *cur; if (c == '\n') { ++cur; goto flushLine; - } else if (!c) { - cur = 0; - goto flushLine; - } else if (c != ' ' && c != '\t' && c != '\r') { - break; } + if (c != ' ' && c != '\t' && c != '\r') + break; } // Then strip comments. Yep - no escaping is possible. for (cptr = cur;; ++cptr) { + if (cptr == inend) { + end = cptr; + break; + } c = *cptr; if (c == '#') { - for (end = cptr; (c = *++cptr);) { - if (c == '\n') { + end = cptr; + while (++cptr < inend) { + if (*cptr == '\n') { ++cptr; break; } @@ -456,10 +466,6 @@ void QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra } break; } - if (!c) { - end = cptr; - break; - } if (c == '\n') { end = cptr++; break; @@ -1211,7 +1217,7 @@ void QMakeParser::finalizeCall(ushort *&tokPtr, ushort *uc, ushort *ptr, int arg bool QMakeParser::resolveVariable(ushort *xprPtr, int tlen, int needSep, ushort **ptr, ushort **buf, QString *xprBuff, ushort **tokPtr, QString *tokBuff, - const ushort *cur, const QString &in) + const ushort *cur, const QStringRef &in) { QString out; m_tmp.setRawData((const QChar *)xprPtr, tlen); |