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qtbase-opensource-src/qmake/library/qmakeparser.cpp

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Import Upstream version 5.15.3+dfsg
2022-05-14 17:39:13 +08:00
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the qmake application of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qmakeparser.h"
#include "qmakevfs.h"
#include "ioutils.h"
using namespace QMakeInternal;
#include <qfile.h>
#ifdef PROPARSER_THREAD_SAFE
# include <qthreadpool.h>
#endif
QT_BEGIN_NAMESPACE
///////////////////////////////////////////////////////////////////////
//
// ProFileCache
//
///////////////////////////////////////////////////////////////////////
ProFileCache::ProFileCache()
{
QMakeVfs::ref();
}
ProFileCache::~ProFileCache()
{
for (const Entry &ent : qAsConst(parsed_files))
if (ent.pro)
ent.pro->deref();
QMakeVfs::deref();
}
void ProFileCache::discardFile(const QString &fileName, QMakeVfs *vfs)
{
int eid = vfs->idForFileName(fileName, QMakeVfs::VfsExact | QMakeVfs::VfsAccessedOnly);
if (eid)
discardFile(eid);
int cid = vfs->idForFileName(fileName, QMakeVfs::VfsCumulative | QMakeVfs::VfsAccessedOnly);
if (cid && cid != eid)
discardFile(cid);
}
void ProFileCache::discardFile(int id)
{
#ifdef PROPARSER_THREAD_SAFE
QMutexLocker lck(&mutex);
#endif
auto it = parsed_files.find(id);
if (it != parsed_files.end()) {
#ifdef PROPARSER_THREAD_SAFE
if (it->locker) {
if (!it->locker->done) {
++it->locker->waiters;
it->locker->cond.wait(&mutex);
if (!--it->locker->waiters) {
delete it->locker;
it->locker = 0;
}
}
}
#endif
if (it->pro)
it->pro->deref();
parsed_files.erase(it);
}
}
void ProFileCache::discardFiles(const QString &prefix, QMakeVfs *vfs)
{
#ifdef PROPARSER_THREAD_SAFE
QMutexLocker lck(&mutex);
#endif
auto it = parsed_files.begin(), end = parsed_files.end();
while (it != end) {
// Note: this is empty for virtual files from other VFSes.
QString fn = vfs->fileNameForId(it.key());
if (fn.startsWith(prefix)) {
#ifdef PROPARSER_THREAD_SAFE
if (it->locker) {
if (!it->locker->done) {
++it->locker->waiters;
it->locker->cond.wait(&mutex);
if (!--it->locker->waiters) {
delete it->locker;
it->locker = 0;
}
}
}
#endif
if (it->pro)
it->pro->deref();
it = parsed_files.erase(it);
} else {
++it;
}
}
}
////////// Parser ///////////
#define fL1S(s) QString::fromLatin1(s)
namespace { // MSVC2010 doesn't seem to know the semantics of "static" ...
static struct {
QString strelse;
QString strfor;
QString strdefineTest;
QString strdefineReplace;
QString strbypassNesting;
QString stroption;
QString strreturn;
QString strnext;
QString strbreak;
QString strhost_build;
QString strLINE;
QString strFILE;
QString strLITERAL_HASH;
QString strLITERAL_DOLLAR;
QString strLITERAL_WHITESPACE;
} statics;
}
void QMakeParser::initialize()
{
if (!statics.strelse.isNull())
return;
statics.strelse = QLatin1String("else");
statics.strfor = QLatin1String("for");
statics.strdefineTest = QLatin1String("defineTest");
statics.strdefineReplace = QLatin1String("defineReplace");
statics.strbypassNesting = QLatin1String("bypassNesting");
statics.stroption = QLatin1String("option");
statics.strreturn = QLatin1String("return");
statics.strnext = QLatin1String("next");
statics.strbreak = QLatin1String("break");
statics.strhost_build = QLatin1String("host_build");
statics.strLINE = QLatin1String("_LINE_");
statics.strFILE = QLatin1String("_FILE_");
statics.strLITERAL_HASH = QLatin1String("LITERAL_HASH");
statics.strLITERAL_DOLLAR = QLatin1String("LITERAL_DOLLAR");
statics.strLITERAL_WHITESPACE = QLatin1String("LITERAL_WHITESPACE");
}
QMakeParser::QMakeParser(ProFileCache *cache, QMakeVfs *vfs, QMakeParserHandler *handler)
: m_cache(cache)
, m_handler(handler)
, m_vfs(vfs)
{
// So that single-threaded apps don't have to call initialize() for now.
initialize();
}
ProFile *QMakeParser::parsedProFile(const QString &fileName, ParseFlags flags)
{
ProFile *pro;
QMakeVfs::VfsFlags vfsFlags = ((flags & ParseCumulative) ? QMakeVfs::VfsCumulative
: QMakeVfs::VfsExact);
int id = m_vfs->idForFileName(fileName, vfsFlags);
if ((flags & ParseUseCache) && m_cache) {
ProFileCache::Entry *ent;
#ifdef PROPARSER_THREAD_SAFE
QMutexLocker locker(&m_cache->mutex);
#endif
auto it = m_cache->parsed_files.find(id);
if (it != m_cache->parsed_files.end()) {
ent = &*it;
#ifdef PROPARSER_THREAD_SAFE
if (ent->locker && !ent->locker->done) {
++ent->locker->waiters;
QThreadPool::globalInstance()->releaseThread();
ent->locker->cond.wait(locker.mutex());
QThreadPool::globalInstance()->reserveThread();
if (!--ent->locker->waiters) {
delete ent->locker;
ent->locker = 0;
}
}
#endif
if ((pro = ent->pro))
pro->ref();
} else {
ent = &m_cache->parsed_files[id];
#ifdef PROPARSER_THREAD_SAFE
ent->locker = new ProFileCache::Entry::Locker;
locker.unlock();
#endif
QString contents;
if (readFile(id, flags, &contents)) {
pro = parsedProBlock(QStringRef(&contents), id, fileName, 1, FullGrammar);
pro->itemsRef()->squeeze();
pro->ref();
} else {
pro = nullptr;
}
ent->pro = pro;
#ifdef PROPARSER_THREAD_SAFE
locker.relock();
if (ent->locker->waiters) {
ent->locker->done = true;
ent->locker->cond.wakeAll();
} else {
delete ent->locker;
ent->locker = 0;
}
#endif
}
} else {
QString contents;
if (readFile(id, flags, &contents))
pro = parsedProBlock(QStringRef(&contents), id, fileName, 1, FullGrammar);
else
pro = nullptr;
}
return pro;
}
ProFile *QMakeParser::parsedProBlock(
const QStringRef &contents, int id, const QString &name, int line, SubGrammar grammar)
{
ProFile *pro = new ProFile(id, name);
read(pro, contents, line, grammar);
return pro;
}
void QMakeParser::discardFileFromCache(int id)
{
if (m_cache)
m_cache->discardFile(id);
}
bool QMakeParser::readFile(int id, ParseFlags flags, QString *contents)
{
QString errStr;
QMakeVfs::ReadResult result = m_vfs->readFile(id, contents, &errStr);
if (result != QMakeVfs::ReadOk) {
if (m_handler && ((flags & ParseReportMissing) || result != QMakeVfs::ReadNotFound))
m_handler->message(QMakeParserHandler::ParserIoError,
fL1S("Cannot read %1: %2").arg(m_vfs->fileNameForId(id), errStr));
return false;
}
return true;
}
void QMakeParser::putTok(ushort *&tokPtr, ushort tok)
{
*tokPtr++ = tok;
}
void QMakeParser::putBlockLen(ushort *&tokPtr, uint len)
{
*tokPtr++ = (ushort)len;
*tokPtr++ = (ushort)(len >> 16);
}
void QMakeParser::putBlock(ushort *&tokPtr, const ushort *buf, uint len)
{
memcpy(tokPtr, buf, len * 2);
tokPtr += len;
}
void QMakeParser::putHashStr(ushort *&pTokPtr, const ushort *buf, uint len)
{
uint hash = ProString::hash((const QChar *)buf, len);
ushort *tokPtr = pTokPtr;
*tokPtr++ = (ushort)hash;
*tokPtr++ = (ushort)(hash >> 16);
*tokPtr++ = (ushort)len;
if (len) // buf may be nullptr; don't pass that to memcpy (-> undefined behavior)
memcpy(tokPtr, buf, len * 2);
pTokPtr = tokPtr + len;
}
void QMakeParser::finalizeHashStr(ushort *buf, uint len)
{
buf[-4] = TokHashLiteral;
buf[-1] = len;
uint hash = ProString::hash((const QChar *)buf, len);
buf[-3] = (ushort)hash;
buf[-2] = (ushort)(hash >> 16);
}
void QMakeParser::read(ProFile *pro, const QStringRef &in, int line, SubGrammar grammar)
{
m_proFile = pro;
m_lineNo = line;
// Final precompiled token stream buffer
QString tokBuff;
// 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) + size_hint(1) +
// TokValueTerminator(1) == 8 (9)
// - non-empty assignment "A=B C":5 =>
// 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) + ... == 11 (12)
// - test call: "X():":4 =>
// TokHashLiteral(1) + hash(2) + len(1) + "A"(1) + TokTestCall(1) + TokFuncTerminator(1) +
// 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)
// One extra for possibly missing trailing newline.
tokBuff.reserve((in.size() + 1) * 7);
ushort *tokPtr = (ushort *)tokBuff.constData(); // Current writing position
// Expression precompiler buffer.
QString xprBuff;
xprBuff.reserve(tokBuff.capacity()); // Excessive, but simple
ushort *buf = (ushort *)xprBuff.constData();
// Parser state
m_blockstack.clear();
m_blockstack.resize(1);
QStack<ParseCtx> xprStack;
xprStack.reserve(10);
const ushort *cur = (const ushort *)in.unicode();
const ushort *inend = cur + in.length();
m_canElse = false;
freshLine:
m_state = StNew;
m_invert = 0;
m_operator = NoOperator;
m_markLine = m_lineNo;
m_inError = false;
int parens = 0; // Braces in value context
int argc = 0;
int wordCount = 0; // Number of words in currently accumulated expression
int lastIndent = 0; // Previous line's indentation, to detect accidental continuation abuse
bool lineMarked = true; // For in-expression markers
ushort needSep = TokNewStr; // Met unquoted whitespace
ushort quote = 0;
ushort term = 0;
Context context;
ushort *ptr;
if (grammar == ValueGrammar) {
context = CtxPureValue;
ptr = tokPtr + 2;
} else {
context = CtxTest;
ptr = buf + 4;
}
ushort *xprPtr = ptr;
#define FLUSH_LHS_LITERAL() \
do { \
if ((tlen = ptr - xprPtr)) { \
finalizeHashStr(xprPtr, tlen); \
if (needSep) { \
wordCount++; \
needSep = 0; \
} \
} else { \
ptr -= 4; \
} \
} while (0)
#define FLUSH_RHS_LITERAL() \
do { \
if ((tlen = ptr - xprPtr)) { \
xprPtr[-2] = TokLiteral | needSep; \
xprPtr[-1] = tlen; \
if (needSep) { \
wordCount++; \
needSep = 0; \
} \
} else { \
ptr -= 2; \
} \
} while (0)
#define FLUSH_LITERAL() \
do { \
if (context == CtxTest) \
FLUSH_LHS_LITERAL(); \
else \
FLUSH_RHS_LITERAL(); \
} while (0)
#define FLUSH_VALUE_LIST() \
do { \
if (wordCount > 1) { \
xprPtr = tokPtr; \
if (*xprPtr == TokLine) \
xprPtr += 2; \
tokPtr[-1] = ((*xprPtr & TokMask) == TokLiteral) ? wordCount : 0; \
} else { \
tokPtr[-1] = 0; \
} \
tokPtr = ptr; \
putTok(tokPtr, TokValueTerminator); \
} while (0)
const ushort *end; // End of this line
const ushort *cptr; // Start of next line
bool lineCont;
int indent;
if (context == CtxPureValue) {
end = inend;
cptr = nullptr;
lineCont = false;
indent = 0; // just gcc being stupid
goto nextChr;
}
forever {
ushort c;
// First, skip leading whitespace
for (indent = 0; ; ++cur, ++indent) {
if (cur == inend) {
cur = nullptr;
goto flushLine;
}
c = *cur;
if (c == '\n') {
++cur;
goto flushLine;
}
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 == '#') {
end = cptr;
while (++cptr < inend) {
if (*cptr == '\n') {
++cptr;
break;
}
}
if (end == cur) { // Line with only a comment (sans whitespace)
if (m_markLine == m_lineNo)
m_markLine++;
// Qmake bizarreness: such lines do not affect line continuations
goto ignore;
}
break;
}
if (c == '\n') {
end = cptr++;
break;
}
}
// Then look for line continuations. Yep - no escaping here as well.
forever {
// We don't have to check for underrun here, as we already determined
// that the line is non-empty.
ushort ec = *(end - 1);
if (ec == '\\') {
--end;
lineCont = true;
break;
}
if (ec != ' ' && ec != '\t' && ec != '\r') {
lineCont = false;
break;
}
--end;
}
// Finally, do the tokenization
ushort tok, rtok;
int tlen;
newWord:
do {
if (cur == end)
goto lineEnd;
c = *cur++;
} while (c == ' ' || c == '\t');
forever {
if (c == '$') {
if (*cur == '$') { // may be EOF, EOL, WS, '#' or '\\' if past end
cur++;
FLUSH_LITERAL();
if (!lineMarked) {
lineMarked = true;
*ptr++ = TokLine;
*ptr++ = (ushort)m_lineNo;
}
term = 0;
tok = TokVariable;
c = *cur;
if (c == '[') {
ptr += 4;
tok = TokProperty;
term = ']';
c = *++cur;
} else if (c == '{') {
ptr += 4;
term = '}';
c = *++cur;
} else if (c == '(') {
ptr += 2;
tok = TokEnvVar;
term = ')';
c = *++cur;
} else {
ptr += 4;
}
xprPtr = ptr;
rtok = tok;
while ((c & 0xFF00) || c == '.' || c == '_' ||
(c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9') || (c == '/' && term)) {
*ptr++ = c;
if (++cur == end) {
c = 0;
goto notfunc;
}
c = *cur;
}
if (tok == TokVariable && c == '(')
tok = TokFuncName;
notfunc:
if (ptr == xprPtr)
languageWarning(fL1S("Missing name in expansion"));
if (quote)
tok |= TokQuoted;
if (needSep) {
tok |= needSep;
wordCount++;
}
tlen = ptr - xprPtr;
if (rtok != TokVariable
|| !resolveVariable(xprPtr, tlen, needSep, &ptr,
&buf, &xprBuff, &tokPtr, &tokBuff, cur, in)) {
if (rtok == TokVariable || rtok == TokProperty) {
xprPtr[-4] = tok;
uint hash = ProString::hash((const QChar *)xprPtr, tlen);
xprPtr[-3] = (ushort)hash;
xprPtr[-2] = (ushort)(hash >> 16);
xprPtr[-1] = tlen;
} else {
xprPtr[-2] = tok;
xprPtr[-1] = tlen;
}
}
if ((tok & TokMask) == TokFuncName) {
cur++;
funcCall:
{
xprStack.resize(xprStack.size() + 1);
ParseCtx &top = xprStack.top();
top.parens = parens;
top.quote = quote;
top.terminator = term;
top.context = context;
top.argc = argc;
top.wordCount = wordCount;
}
parens = 0;
quote = 0;
term = 0;
argc = 1;
context = CtxArgs;
nextToken:
wordCount = 0;
nextWord:
ptr += (context == CtxTest) ? 4 : 2;
xprPtr = ptr;
needSep = TokNewStr;
goto newWord;
}
if (term) {
checkTerm:
if (c != term) {
parseError(fL1S("Missing %1 terminator [found %2]")
.arg(QChar(term))
.arg(c ? QString(QChar(c)) : QString::fromLatin1("end-of-line")));
m_inError = true;
// Just parse on, as if there was a terminator ...
} else {
cur++;
}
}
joinToken:
ptr += (context == CtxTest) ? 4 : 2;
xprPtr = ptr;
needSep = 0;
goto nextChr;
}
} else if (c == '\\') {
static const char symbols[] = "[]{}()$\\'\"";
ushort c2;
if (cur != end && !((c2 = *cur) & 0xff00) && strchr(symbols, c2)) {
c = c2;
cur++;
} else {
deprecationWarning(fL1S("Unescaped backslashes are deprecated"));
}
} else if (quote) {
if (c == quote) {
quote = 0;
goto nextChr;
} else if (c == '!' && ptr == xprPtr && context == CtxTest) {
m_invert++;
goto nextChr;
}
} else if (c == '\'' || c == '"') {
quote = c;
goto nextChr;
} else if (context == CtxArgs) {
// Function arg context
if (c == ' ' || c == '\t') {
FLUSH_RHS_LITERAL();
goto nextWord;
} else if (c == '(') {
++parens;
} else if (c == ')') {
if (--parens < 0) {
FLUSH_RHS_LITERAL();
*ptr++ = TokFuncTerminator;
int theargc = argc;
{
ParseCtx &top = xprStack.top();
parens = top.parens;
quote = top.quote;
term = top.terminator;
context = top.context;
argc = top.argc;
wordCount = top.wordCount;
xprStack.resize(xprStack.size() - 1);
}
if (term == ':') {
finalizeCall(tokPtr, buf, ptr, theargc);
goto nextItem;
} else if (term == '}') {
c = (cur == end) ? 0 : *cur;
goto checkTerm;
} else {
Q_ASSERT(!term);
goto joinToken;
}
}
} else if (!parens && c == ',') {
FLUSH_RHS_LITERAL();
*ptr++ = TokArgSeparator;
argc++;
goto nextToken;
}
} else if (context == CtxTest) {
// Test or LHS context
if (c == ' ' || c == '\t') {
FLUSH_LHS_LITERAL();
goto nextWord;
} else if (c == '(') {
FLUSH_LHS_LITERAL();
if (wordCount != 1) {
if (wordCount)
parseError(fL1S("Extra characters after test expression."));
else
parseError(fL1S("Opening parenthesis without prior test name."));
ptr = buf; // Put empty function name
}
*ptr++ = TokTestCall;
term = ':';
goto funcCall;
} else if (c == '!' && ptr == xprPtr) {
m_invert++;
goto nextChr;
} else if (c == ':') {
FLUSH_LHS_LITERAL();
finalizeCond(tokPtr, buf, ptr, wordCount);
warnOperator("in front of AND operator");
if (m_state == StNew)
parseError(fL1S("AND operator without prior condition."));
else
m_operator = AndOperator;
nextItem:
ptr = buf;
goto nextToken;
} else if (c == '|') {
FLUSH_LHS_LITERAL();
finalizeCond(tokPtr, buf, ptr, wordCount);
warnOperator("in front of OR operator");
if (m_state != StCond)
parseError(fL1S("OR operator without prior condition."));
else
m_operator = OrOperator;
goto nextItem;
} else if (c == '{') {
FLUSH_LHS_LITERAL();
finalizeCond(tokPtr, buf, ptr, wordCount);
if (m_operator == AndOperator) {
languageWarning(fL1S("Excess colon in front of opening brace."));
m_operator = NoOperator;
}
failOperator("in front of opening brace");
flushCond(tokPtr);
m_state = StNew; // Reset possible StCtrl, so colons get rejected.
++m_blockstack.top().braceLevel;
if (grammar == TestGrammar)
parseError(fL1S("Opening scope not permitted in this context."));
goto nextItem;
} else if (c == '}') {
FLUSH_LHS_LITERAL();
finalizeCond(tokPtr, buf, ptr, wordCount);
m_state = StNew; // De-facto newline
closeScope:
flushScopes(tokPtr);
failOperator("in front of closing brace");
if (!m_blockstack.top().braceLevel) {
parseError(fL1S("Excess closing brace."));
} else if (!--m_blockstack.top().braceLevel
&& m_blockstack.count() != 1) {
leaveScope(tokPtr);
m_state = StNew;
m_canElse = false;
m_markLine = m_lineNo;
}
goto nextItem;
} else if (c == '+') {
tok = TokAppend;
goto do2Op;
} else if (c == '-') {
tok = TokRemove;
goto do2Op;
} else if (c == '*') {
tok = TokAppendUnique;
goto do2Op;
} else if (c == '~') {
tok = TokReplace;
do2Op:
if (*cur == '=') {
cur++;
goto doOp;
}
} else if (c == '=') {
tok = TokAssign;
doOp:
FLUSH_LHS_LITERAL();
flushCond(tokPtr);
acceptColon("in front of assignment");
putLineMarker(tokPtr);
if (grammar == TestGrammar) {
parseError(fL1S("Assignment not permitted in this context."));
} else if (wordCount != 1) {
parseError(fL1S("Assignment needs exactly one word on the left hand side."));
// Put empty variable name.
} else {
putBlock(tokPtr, buf, ptr - buf);
}
putTok(tokPtr, tok);
context = CtxValue;
ptr = ++tokPtr;
goto nextToken;
}
} else if (context == CtxValue) {
if (c == ' ' || c == '\t') {
FLUSH_RHS_LITERAL();
goto nextWord;
} else if (c == '{') {
++parens;
} else if (c == '}') {
if (!parens) {
FLUSH_RHS_LITERAL();
FLUSH_VALUE_LIST();
context = CtxTest;
goto closeScope;
}
--parens;
} else if (c == '=') {
if (indent < lastIndent)
languageWarning(fL1S("Possible accidental line continuation"));
}
}
*ptr++ = c;
nextChr:
if (cur == end)
goto lineEnd;
c = *cur++;
}
lineEnd:
if (lineCont) {
if (quote) {
*ptr++ = ' ';
} else {
FLUSH_LITERAL();
needSep = TokNewStr;
ptr += (context == CtxTest) ? 4 : 2;
xprPtr = ptr;
}
} else {
cur = cptr;
flushLine:
FLUSH_LITERAL();
if (quote) {
parseError(fL1S("Missing closing %1 quote").arg(QChar(quote)));
if (!xprStack.isEmpty()) {
context = xprStack.at(0).context;
xprStack.clear();
}
goto flErr;
} else if (!xprStack.isEmpty()) {
parseError(fL1S("Missing closing parenthesis in function call"));
context = xprStack.at(0).context;
xprStack.clear();
flErr:
pro->setOk(false);
if (context == CtxValue) {
tokPtr[-1] = 0; // sizehint
putTok(tokPtr, TokValueTerminator);
} else if (context == CtxPureValue) {
putTok(tokPtr, TokValueTerminator);
} else {
bogusTest(tokPtr, QString());
}
} else if (context == CtxValue) {
FLUSH_VALUE_LIST();
if (parens)
languageWarning(fL1S("Possible braces mismatch"));
} else if (context == CtxPureValue) {
tokPtr = ptr;
putTok(tokPtr, TokValueTerminator);
} else {
finalizeCond(tokPtr, buf, ptr, wordCount);
warnOperator("at end of line");
}
if (!cur)
break;
++m_lineNo;
goto freshLine;
}
lastIndent = indent;
lineMarked = false;
ignore:
cur = cptr;
++m_lineNo;
}
flushScopes(tokPtr);
if (m_blockstack.size() > 1 || m_blockstack.top().braceLevel)
parseError(fL1S("Missing closing brace(s)."));
while (m_blockstack.size())
leaveScope(tokPtr);
tokBuff.resize(tokPtr - (ushort *)tokBuff.constData()); // Reserved capacity stays
*pro->itemsRef() = tokBuff;
#undef FLUSH_VALUE_LIST
#undef FLUSH_LITERAL
#undef FLUSH_LHS_LITERAL
#undef FLUSH_RHS_LITERAL
}
void QMakeParser::putLineMarker(ushort *&tokPtr)
{
if (m_markLine) {
*tokPtr++ = TokLine;
*tokPtr++ = (ushort)m_markLine;
m_markLine = 0;
}
}
void QMakeParser::enterScope(ushort *&tokPtr, bool special, ScopeState state)
{
uchar nest = m_blockstack.top().nest;
m_blockstack.resize(m_blockstack.size() + 1);
m_blockstack.top().special = special;
m_blockstack.top().start = tokPtr;
m_blockstack.top().nest = nest;
tokPtr += 2;
m_state = state;
m_canElse = false;
if (special)
m_markLine = m_lineNo;
}
void QMakeParser::leaveScope(ushort *&tokPtr)
{
if (m_blockstack.top().inBranch) {
// Put empty else block
putBlockLen(tokPtr, 0);
}
if (ushort *start = m_blockstack.top().start) {
putTok(tokPtr, TokTerminator);
uint len = tokPtr - start - 2;
start[0] = (ushort)len;
start[1] = (ushort)(len >> 16);
}
m_blockstack.resize(m_blockstack.size() - 1);
}
// If we are on a fresh line, close all open one-line scopes.
void QMakeParser::flushScopes(ushort *&tokPtr)
{
if (m_state == StNew) {
while (!m_blockstack.top().braceLevel && m_blockstack.size() > 1)
leaveScope(tokPtr);
if (m_blockstack.top().inBranch) {
m_blockstack.top().inBranch = false;
// Put empty else block
putBlockLen(tokPtr, 0);
}
m_canElse = false;
}
}
// If there is a pending conditional, enter a new scope, otherwise flush scopes.
void QMakeParser::flushCond(ushort *&tokPtr)
{
if (m_state == StCond) {
putTok(tokPtr, TokBranch);
m_blockstack.top().inBranch = true;
enterScope(tokPtr, false, StNew);
} else {
flushScopes(tokPtr);
}
}
void QMakeParser::warnOperator(const char *msg)
{
if (m_invert) {
languageWarning(fL1S("Stray NOT operator %1.").arg(fL1S(msg)));
m_invert = 0;
}
if (m_operator == AndOperator) {
languageWarning(fL1S("Stray AND operator %1.").arg(fL1S(msg)));
m_operator = NoOperator;
} else if (m_operator == OrOperator) {
languageWarning(fL1S("Stray OR operator %1.").arg(fL1S(msg)));
m_operator = NoOperator;
}
}
bool QMakeParser::failOperator(const char *msg)
{
bool fail = false;
if (m_invert) {
parseError(fL1S("Unexpected NOT operator %1.").arg(fL1S(msg)));
m_invert = 0;
fail = true;
}
if (m_operator == AndOperator) {
parseError(fL1S("Unexpected AND operator %1.").arg(fL1S(msg)));
m_operator = NoOperator;
fail = true;
} else if (m_operator == OrOperator) {
parseError(fL1S("Unexpected OR operator %1.").arg(fL1S(msg)));
m_operator = NoOperator;
fail = true;
}
return fail;
}
bool QMakeParser::acceptColon(const char *msg)
{
if (m_operator == AndOperator)
m_operator = NoOperator;
return !failOperator(msg);
}
void QMakeParser::putOperator(ushort *&tokPtr)
{
if (m_operator== AndOperator) {
// A colon must be used after else and for() if no brace is used,
// but in this case it is obviously not a binary operator.
if (m_state == StCond)
putTok(tokPtr, TokAnd);
m_operator = NoOperator;
} else if (m_operator == OrOperator) {
putTok(tokPtr, TokOr);
m_operator = NoOperator;
}
}
void QMakeParser::finalizeTest(ushort *&tokPtr)
{
flushScopes(tokPtr);
putLineMarker(tokPtr);
putOperator(tokPtr);
if (m_invert & 1)
putTok(tokPtr, TokNot);
m_invert = 0;
m_state = StCond;
m_canElse = true;
}
void QMakeParser::bogusTest(ushort *&tokPtr, const QString &msg)
{
if (!msg.isEmpty())
parseError(msg);
flushScopes(tokPtr);
m_operator = NoOperator;
m_invert = 0;
m_state = StCond;
m_canElse = true;
}
void QMakeParser::finalizeCond(ushort *&tokPtr, ushort *uc, ushort *ptr, int wordCount)
{
if (wordCount != 1) {
if (wordCount)
bogusTest(tokPtr, fL1S("Extra characters after test expression."));
return;
}
// Check for magic tokens
if (*uc == TokHashLiteral) {
uint nlen = uc[3];
ushort *uce = uc + 4 + nlen;
if (uce == ptr) {
m_tmp.setRawData((QChar *)uc + 4, nlen);
if (!m_tmp.compare(statics.strelse, Qt::CaseInsensitive)) {
if (failOperator("in front of else"))
return;
BlockScope &top = m_blockstack.top();
if (m_canElse && (!top.special || top.braceLevel)) {
// A list of tests (the last one likely with side effects),
// but no assignment, scope, etc.
putTok(tokPtr, TokBranch);
// Put empty then block
putBlockLen(tokPtr, 0);
enterScope(tokPtr, false, StCtrl);
return;
}
forever {
BlockScope &top = m_blockstack.top();
if (top.inBranch && (!top.special || top.braceLevel)) {
top.inBranch = false;
enterScope(tokPtr, false, StCtrl);
return;
}
if (top.braceLevel || m_blockstack.size() == 1)
break;
leaveScope(tokPtr);
}
parseError(fL1S("Unexpected 'else'."));
return;
}
}
}
finalizeTest(tokPtr);
putBlock(tokPtr, uc, ptr - uc);
putTok(tokPtr, TokCondition);
}
void QMakeParser::finalizeCall(ushort *&tokPtr, ushort *uc, ushort *ptr, int argc)
{
// Check for magic tokens
if (*uc == TokHashLiteral) {
uint nlen = uc[3];
ushort *uce = uc + 4 + nlen;
if (*uce == TokTestCall) {
uce++;
m_tmp.setRawData((QChar *)uc + 4, nlen);
const QString *defName;
ushort defType;
if (m_tmp == statics.strfor) {
if (!acceptColon("in front of for()")) {
bogusTest(tokPtr, QString());
return;
}
flushCond(tokPtr);
putLineMarker(tokPtr);
--ptr;
Q_ASSERT(*ptr == TokFuncTerminator);
if (*uce == (TokLiteral|TokNewStr)) {
nlen = uce[1];
uc = uce + 2 + nlen;
if (uc == ptr) {
// for(literal) (only "ever" would be legal if qmake was sane)
putTok(tokPtr, TokForLoop);
putHashStr(tokPtr, nullptr, (uint)0);
putBlockLen(tokPtr, 1 + 3 + nlen + 1);
putTok(tokPtr, TokHashLiteral);
putHashStr(tokPtr, uce + 2, nlen);
didFor:
putTok(tokPtr, TokValueTerminator);
enterScope(tokPtr, true, StCtrl);
m_blockstack.top().nest |= NestLoop;
return;
} else if (*uc == TokArgSeparator && argc == 2) {
// for(var, something)
uc++;
putTok(tokPtr, TokForLoop);
putHashStr(tokPtr, uce + 2, nlen);
doFor:
nlen = ptr - uc;
putBlockLen(tokPtr, nlen + 1);
putBlock(tokPtr, uc, nlen);
goto didFor;
}
} else if (argc == 1) {
// for(non-literal) (this wouldn't be here if qmake was sane)
putTok(tokPtr, TokForLoop);
putHashStr(tokPtr, nullptr, (uint)0);
uc = uce;
goto doFor;
}
parseError(fL1S("Syntax is for(var, list), for(var, forever) or for(ever)."));
return;
} else if (m_tmp == statics.strdefineReplace) {
defName = &statics.strdefineReplace;
defType = TokReplaceDef;
goto deffunc;
} else if (m_tmp == statics.strdefineTest) {
defName = &statics.strdefineTest;
defType = TokTestDef;
deffunc:
if (m_invert) {
bogusTest(tokPtr, fL1S("Unexpected NOT operator in front of function definition."));
return;
}
flushScopes(tokPtr);
putLineMarker(tokPtr);
if (*uce == (TokLiteral|TokNewStr)) {
uint nlen = uce[1];
if (uce[nlen + 2] == TokFuncTerminator) {
putOperator(tokPtr);
putTok(tokPtr, defType);
putHashStr(tokPtr, uce + 2, nlen);
enterScope(tokPtr, true, StCtrl);
m_blockstack.top().nest = NestFunction;
return;
}
}
parseError(fL1S("%1(function) requires one literal argument.").arg(*defName));
return;
} else if (m_tmp == statics.strbypassNesting) {
if (*uce != TokFuncTerminator) {
bogusTest(tokPtr, fL1S("%1() requires zero arguments.").arg(m_tmp));
return;
}
if (!(m_blockstack.top().nest & NestFunction)) {
bogusTest(tokPtr, fL1S("Unexpected %1().").arg(m_tmp));
return;
}
if (m_invert) {
bogusTest(tokPtr, fL1S("Unexpected NOT operator in front of %1().").arg(m_tmp));
return;
}
flushScopes(tokPtr);
putLineMarker(tokPtr);
putOperator(tokPtr);
putTok(tokPtr, TokBypassNesting);
enterScope(tokPtr, true, StCtrl);
return;
} else if (m_tmp == statics.strreturn) {
if (m_blockstack.top().nest & NestFunction) {
if (argc > 1) {
bogusTest(tokPtr, fL1S("return() requires zero or one argument."));
return;
}
} else {
if (*uce != TokFuncTerminator) {
bogusTest(tokPtr, fL1S("Top-level return() requires zero arguments."));
return;
}
}
defType = TokReturn;
goto ctrlstm2;
} else if (m_tmp == statics.strnext) {
defType = TokNext;
goto ctrlstm;
} else if (m_tmp == statics.strbreak) {
defType = TokBreak;
ctrlstm:
if (*uce != TokFuncTerminator) {
bogusTest(tokPtr, fL1S("%1() requires zero arguments.").arg(m_tmp));
return;
}
if (!(m_blockstack.top().nest & NestLoop)) {
bogusTest(tokPtr, fL1S("Unexpected %1().").arg(m_tmp));
return;
}
ctrlstm2:
if (m_invert) {
bogusTest(tokPtr, fL1S("Unexpected NOT operator in front of %1().").arg(m_tmp));
return;
}
finalizeTest(tokPtr);
putBlock(tokPtr, uce, ptr - uce - 1); // Only for TokReturn
putTok(tokPtr, defType);
return;
} else if (m_tmp == statics.stroption) {
if (m_state != StNew || m_blockstack.top().braceLevel || m_blockstack.size() > 1
|| m_invert || m_operator != NoOperator) {
bogusTest(tokPtr, fL1S("option() must appear outside any control structures."));
return;
}
if (*uce == (TokLiteral|TokNewStr)) {
uint nlen = uce[1];
if (uce[nlen + 2] == TokFuncTerminator) {
m_tmp.setRawData((QChar *)uce + 2, nlen);
if (m_tmp == statics.strhost_build)
m_proFile->setHostBuild(true);
else
parseError(fL1S("Unknown option() %1.").arg(m_tmp));
return;
}
}
parseError(fL1S("option() requires one literal argument."));
return;
}
}
}
finalizeTest(tokPtr);
putBlock(tokPtr, uc, ptr - uc);
}
bool QMakeParser::resolveVariable(ushort *xprPtr, int tlen, int needSep, ushort **ptr,
ushort **buf, QString *xprBuff,
ushort **tokPtr, QString *tokBuff,
const ushort *cur, const QStringRef &in)
{
QString out;
m_tmp.setRawData((const QChar *)xprPtr, tlen);
if (m_tmp == statics.strLINE) {
out.setNum(m_lineNo);
} else if (m_tmp == statics.strFILE) {
out = m_proFile->fileName();
// The string is typically longer than the variable reference, so we need
// to ensure that there is enough space in the output buffer - as unlikely
// as an overflow is to actually happen in practice.
int need = (in.length() - (cur - (const ushort *)in.constData()) + 2) * 5 + out.length();
int tused = *tokPtr - (ushort *)tokBuff->constData();
int xused;
int total;
bool ptrFinal = xprPtr >= (ushort *)tokBuff->constData()
&& xprPtr < (ushort *)tokBuff->constData() + tokBuff->capacity();
if (ptrFinal) {
xused = xprPtr - (ushort *)tokBuff->constData();
total = xused + need;
} else {
xused = xprPtr - *buf;
total = tused + xused + need;
}
if (tokBuff->capacity() < total) {
tokBuff->reserve(total);
*tokPtr = (ushort *)tokBuff->constData() + tused;
xprBuff->reserve(total);
*buf = (ushort *)xprBuff->constData();
xprPtr = (ptrFinal ? (ushort *)tokBuff->constData() : *buf) + xused;
}
} else if (m_tmp == statics.strLITERAL_HASH) {
out = QLatin1String("#");
} else if (m_tmp == statics.strLITERAL_DOLLAR) {
out = QLatin1String("$");
} else if (m_tmp == statics.strLITERAL_WHITESPACE) {
out = QLatin1String("\t");
} else {
return false;
}
xprPtr -= 2; // Was set up for variable reference
xprPtr[-2] = TokLiteral | needSep;
xprPtr[-1] = out.length();
memcpy(xprPtr, out.constData(), out.length() * 2);
*ptr = xprPtr + out.length();
return true;
}
void QMakeParser::message(int type, const QString &msg) const
{
if (!m_inError && m_handler)
m_handler->message(type, msg, m_proFile->fileName(), m_lineNo);
}
#ifdef PROPARSER_DEBUG
#define BOUNDS_CHECK(need) \
do { \
int have = limit - offset; \
if (have < (int)need) { \
*outStr += fL1S("<out of bounds (need %1, got %2)>").arg(need).arg(have); \
return false; \
} \
} while (0)
static bool getRawUshort(const ushort *tokens, int limit, int &offset, ushort *outVal, QString *outStr)
{
BOUNDS_CHECK(1);
uint val = tokens[offset++];
*outVal = val;
return true;
}
static bool getUshort(const ushort *tokens, int limit, int &offset, ushort *outVal, QString *outStr)
{
*outStr += fL1S(" << H(");
if (!getRawUshort(tokens, limit, offset, outVal, outStr))
return false;
*outStr += QString::number(*outVal) + QLatin1Char(')');
return true;
}
static bool getRawUint(const ushort *tokens, int limit, int &offset, uint *outVal, QString *outStr)
{
BOUNDS_CHECK(2);
uint val = tokens[offset++];
val |= (uint)tokens[offset++] << 16;
*outVal = val;
return true;
}
static bool getUint(const ushort *tokens, int limit, int &offset, uint *outVal, QString *outStr)
{
*outStr += fL1S(" << I(");
if (!getRawUint(tokens, limit, offset, outVal, outStr))
return false;
*outStr += QString::number(*outVal) + QLatin1Char(')');
return true;
}
static bool getRawStr(const ushort *tokens, int limit, int &offset, int strLen, QString *outStr)
{
BOUNDS_CHECK(strLen);
*outStr += fL1S("L\"");
bool attn = false;
for (int i = 0; i < strLen; i++) {
ushort val = tokens[offset++];
switch (val) {
case '"': *outStr += fL1S("\\\""); break;
case '\n': *outStr += fL1S("\\n"); break;
case '\r': *outStr += fL1S("\\r"); break;
case '\t': *outStr += fL1S("\\t"); break;
case '\\': *outStr += fL1S("\\\\"); break;
default:
if (val < 32 || val > 126) {
*outStr += (val > 255 ? fL1S("\\u") : fL1S("\\x")) + QString::number(val, 16);
attn = true;
continue;
}
if (attn && isxdigit(val))
*outStr += fL1S("\"\"");
*outStr += QChar(val);
break;
}
attn = false;
}
*outStr += QLatin1Char('"');
return true;
}
static bool getStr(const ushort *tokens, int limit, int &offset, QString *outStr)
{
*outStr += fL1S(" << S(");
ushort len;
if (!getRawUshort(tokens, limit, offset, &len, outStr))
return false;
if (!getRawStr(tokens, limit, offset, len, outStr))
return false;
*outStr += QLatin1Char(')');
return true;
}
static bool getHashStr(const ushort *tokens, int limit, int &offset, QString *outStr)
{
*outStr += fL1S(" << HS(");
uint hash;
if (!getRawUint(tokens, limit, offset, &hash, outStr))
return false;
ushort len;
if (!getRawUshort(tokens, limit, offset, &len, outStr))
return false;
const QChar *chars = (const QChar *)tokens + offset;
if (!getRawStr(tokens, limit, offset, len, outStr))
return false;
uint realhash = ProString::hash(chars, len);
if (realhash != hash)
*outStr += fL1S(" /* Bad hash ") + QString::number(hash) + fL1S(" */");
*outStr += QLatin1Char(')');
return true;
}
static bool getBlock(const ushort *tokens, int limit, int &offset, QString *outStr, int indent);
static bool getSubBlock(const ushort *tokens, int limit, int &offset, QString *outStr, int indent,
const char *scope)
{
*outStr += fL1S("\n /* %1 */ ").arg(offset, 5)
+ QString(indent * 4, QLatin1Char(' '))
+ fL1S("/* ") + fL1S(scope) + fL1S(" */");
uint len;
if (!getUint(tokens, limit, offset, &len, outStr))
return false;
if (len) {
BOUNDS_CHECK(len);
int tmpOff = offset;
offset += len;
forever {
if (!getBlock(tokens, offset, tmpOff, outStr, indent + 1))
break; // Error was already reported, try to continue
if (tmpOff == offset)
break;
*outStr += QLatin1Char('\n') + QString(20 + indent * 4, QLatin1Char(' '))
+ fL1S("/* Warning: Excess tokens follow. */");
}
}
return true;
}
static bool getBlock(const ushort *tokens, int limit, int &offset, QString *outStr, int indent)
{
static const char * const tokNames[] = {
"TokTerminator",
"TokLine",
"TokAssign", "TokAppend", "TokAppendUnique", "TokRemove", "TokReplace",
"TokValueTerminator",
"TokLiteral", "TokHashLiteral", "TokVariable", "TokProperty", "TokEnvVar",
"TokFuncName", "TokArgSeparator", "TokFuncTerminator",
"TokCondition", "TokTestCall",
"TokReturn", "TokBreak", "TokNext",
"TokNot", "TokAnd", "TokOr",
"TokBranch", "TokForLoop",
"TokTestDef", "TokReplaceDef", "TokBypassNesting"
};
while (offset != limit) {
*outStr += fL1S("\n /* %1 */").arg(offset, 5)
+ QString(indent * 4, QLatin1Char(' '));
BOUNDS_CHECK(1);
ushort tok = tokens[offset++];
ushort maskedTok = tok & TokMask;
if (maskedTok >= sizeof(tokNames)/sizeof(tokNames[0])
|| (tok & ~(TokNewStr | TokQuoted | TokMask))) {
*outStr += fL1S(" << {invalid token %1}").arg(tok);
return false;
}
*outStr += fL1S(" << H(") + fL1S(tokNames[maskedTok]);
if (tok & TokNewStr)
*outStr += fL1S(" | TokNewStr");
if (tok & TokQuoted)
*outStr += fL1S(" | TokQuoted");
*outStr += QLatin1Char(')');
bool ok;
switch (maskedTok) {
case TokFuncTerminator: // Recursion, but not a sub-block
return true;
case TokArgSeparator:
case TokValueTerminator: // Not recursion
case TokTerminator: // Recursion, and limited by (sub-)block length
case TokCondition:
case TokReturn:
case TokBreak:
case TokNext:
case TokNot:
case TokAnd:
case TokOr:
ok = true;
break;
case TokTestCall:
ok = getBlock(tokens, limit, offset, outStr, indent + 1);
break;
case TokBranch:
ok = getSubBlock(tokens, limit, offset, outStr, indent, "then branch");
if (ok)
ok = getSubBlock(tokens, limit, offset, outStr, indent, "else branch");
break;
default:
switch (maskedTok) {
case TokAssign:
case TokAppend:
case TokAppendUnique:
case TokRemove:
case TokReplace:
// The parameter is the sizehint for the output.
// fallthrough
case TokLine: {
ushort dummy;
ok = getUshort(tokens, limit, offset, &dummy, outStr);
break; }
case TokLiteral:
case TokEnvVar:
ok = getStr(tokens, limit, offset, outStr);
break;
case TokHashLiteral:
case TokVariable:
case TokProperty:
ok = getHashStr(tokens, limit, offset, outStr);
break;
case TokFuncName:
ok = getHashStr(tokens, limit, offset, outStr);
if (ok)
ok = getBlock(tokens, limit, offset, outStr, indent + 1);
break;
case TokForLoop:
ok = getHashStr(tokens, limit, offset, outStr);
if (ok)
ok = getSubBlock(tokens, limit, offset, outStr, indent, "iterator");
if (ok)
ok = getSubBlock(tokens, limit, offset, outStr, indent, "body");
break;
case TokTestDef:
case TokReplaceDef:
ok = getHashStr(tokens, limit, offset, outStr);
if (ok)
ok = getSubBlock(tokens, limit, offset, outStr, indent, "body");
break;
case TokBypassNesting:
ok = getSubBlock(tokens, limit, offset, outStr, indent, "block");
break;
default:
Q_ASSERT(!"unhandled token");
}
}
if (!ok)
return false;
}
return true;
}
QString QMakeParser::formatProBlock(const QString &block)
{
QString outStr;
outStr += fL1S("\n << TS(");
int offset = 0;
getBlock(reinterpret_cast<const ushort *>(block.constData()), block.length(),
offset, &outStr, 0);
outStr += QLatin1Char(')');
return outStr;
}
#endif // PROPARSER_DEBUG
QT_END_NAMESPACE