project.cpp

qtmake 文件的代码

            scope_blocks.top().iterate->parser.append(IteratorBlock::Parse(append));
        if(iterate_finished) {
            scope_blocks.top().iterate = 0;
            bool ret = it->exec(this, place);
            delete it;
            if(!ret)
                return false;
            s = QString(d);
        } else {
            return true;
        }
    }

    QString scope, var, op;
    QStringList val;
#define SKIP_WS(d) while(*d && (*d == ' ' || *d == '\t')) d++
    QByteArray dd = s.toLatin1();
    const char *d = dd;
    SKIP_WS(d);
    IteratorBlock *iterator = 0;
    bool scope_failed = false, else_line = false, or_op=false;
    char quote = 0;
    int parens = 0, scope_count=0, start_block = 0;
    while(*d) {
        if(!parens) {
            if(*d == '=')
                break;
            if(*d == '+' || *d == '-' || *d == '*' || *d == '~') {
                if(*(d+1) == '=') {
                    break;
                } else if(*(d+1) == ' ') {
                    const char *k = d + 1;
                    SKIP_WS(k);
                    if(*k == '=') {
                        QString msg;
                        qmake_error_msg(*d + "must be followed immediately by =");
                        return false;
                    }
                }
            }
        }

        if(quote) {
            if(*d == quote)
                quote = 0;
        } else if(*d == '(') {
            ++parens;
        } else if(*d == ')') {
            --parens;
        } else if(*d == '"' /*|| *d == '\''*/) {
            quote = *d;
        }

        if(!parens && !quote && (*d == ':' || *d == '{' || *d == ')' || *d == '|')) {
            scope_count++;
            scope = var.trimmed();
            if(*d == ')')
                scope += *d; // need this
            var = "";

            bool test = scope_failed;
            if(scope.toLower() == "else") { //else is a builtin scope here as it modifies state
                if(scope_count != 1 || scope_blocks.top().else_status == ScopeBlock::TestNone) {
                    qmake_error_msg(("Unexpected " + scope + " ('" + s + "')").toLatin1());
                    return false;
                }
                else_line = true;
                test = (scope_blocks.top().else_status == ScopeBlock::TestSeek);
                debug_msg(1, "Project Parser: %s:%d : Else%s %s.", parser.file.toLatin1().constData(), parser.line_no,
                          scope == "else" ? "" : QString(" (" + scope + ")").toLatin1().constData(),
                          test ? "considered" : "excluded");
            } else {
                QString comp_scope = scope;
                bool invert_test = (comp_scope.left(1) == "!");
                if(invert_test)
                    comp_scope = comp_scope.right(comp_scope.length()-1);
                int lparen = comp_scope.indexOf('(');
                if(or_op == scope_failed) {
                    if(lparen != -1) { // if there is an lparen in the scope, it IS a function
                        int rparen = comp_scope.lastIndexOf(')');
                        if(rparen == -1) {
                            QByteArray error;
                            error.reserve(256);
#if defined(_MSC_VER) && _MSC_VER >= 1400
                            sprintf_s(error.data(), 256, "Function missing right paren: %s ('%s')",
                                    comp_scope.toLatin1().constData(), s.toLatin1().constData());
#else
                            sprintf(error.data(), "Function missing right paren: %s ('%s')",
                                    comp_scope.toLatin1().constData(), s.toLatin1().constData());
#endif
                            qmake_error_msg(error);
                            return false;
                        }
                        QString func = comp_scope.left(lparen);
                        QStringList args = split_arg_list(comp_scope.mid(lparen+1, rparen - lparen - 1));
                        for(int i = 0; i < args.size(); ++i)
                            args[i] = remove_quotes(args[i].trimmed());
                        if(function) {
                            fprintf(stderr, "%s:%d: No tests can come after a function definition!\n",
                                    parser.file.toLatin1().constData(), parser.line_no);
                            return false;
                        } else if(func == "for") { //for is a builtin function here, as it modifies state
                            if(args.count() > 2 || args.count() < 1) {
                                fprintf(stderr, "%s:%d: for(iterate, list) requires two arguments.\n",
                                        parser.file.toLatin1().constData(), parser.line_no);
                                return false;
                            } else if(iterator) {
                                fprintf(stderr, "%s:%d unexpected nested for()\n",
                                        parser.file.toLatin1().constData(), parser.line_no);
                                return false;
                            }

                            iterator = new IteratorBlock;
                            QString it_list;
                            if(args.count() == 1) {
                                doVariableReplace(args[0], place);
                                it_list = args[0];
                                if(args[0] != "ever") {
                                    delete iterator;
                                    iterator = 0;
                                    fprintf(stderr, "%s:%d: for(iterate, list) requires two arguments.\n",
                                            parser.file.toLatin1().constData(), parser.line_no);
                                    return false;
                                }
                                it_list = "forever";
                            } else if(args.count() == 2) {
                                iterator->variable = args[0];
                                doVariableReplace(args[1], place);
                                it_list = args[1];
                            }
                            QStringList list = place[it_list];
                            if(list.isEmpty()) {
                                if(it_list == "forever") {
                                    iterator->loop_forever = true;
                                } else {
                                    int dotdot = it_list.indexOf("..");
                                    if(dotdot != -1) {
                                        bool ok;
                                        int start = it_list.left(dotdot).toInt(&ok);
                                        if(ok) {
                                            int end = it_list.mid(dotdot+2).toInt(&ok);
                                            if(ok) {
                                                if(start < end) {
                                                    for(int i = start; i <= end; i++)
                                                        list << QString::number(i);
                                                } else {
                                                    for(int i = start; i >= end; i--)
                                                        list << QString::number(i);
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                            iterator->list = list;
                            test = !invert_test;
                        } else if(iterator) {
                            iterator->test.append(IteratorBlock::Test(func, args, invert_test));
                            test = !invert_test;
                        } else if(func == "defineTest" || func == "defineReplace") {
                            if(!function_blocks.isEmpty()) {
                                fprintf(stderr,
                                        "%s:%d: cannot define a function within another definition.\n",
                                        parser.file.toLatin1().constData(), parser.line_no);
                                return false;
                            }
                            if(args.count() != 1) {
                                fprintf(stderr, "%s:%d: %s(function_name) requires one argument.\n",
                                        parser.file.toLatin1().constData(), parser.line_no, func.toLatin1().constData());
                                return false;
                            }
                            QMap<QString, FunctionBlock*> *map = 0;
                            if(func == "defineTest")
                                map = &testFunctions;
                            else
                                map = &replaceFunctions;
                            if(!map || map->contains(args[0])) {
                                fprintf(stderr, "%s:%d: Function[%s] multiply defined.\n",
                                        parser.file.toLatin1().constData(), parser.line_no, args[0].toLatin1().constData());
                                return false;
                            }
                            function = new FunctionBlock;
                            map->insert(args[0], function);
                            test = true;
                        } else {
                            test = doProjectTest(func, args, place);
                            if(*d == ')' && !*(d+1)) {
                                if(invert_test)
                                    test = !test;
                                scope_blocks.top().else_status =
                                    (test ? ScopeBlock::TestFound : ScopeBlock::TestSeek);
                                return true;  // assume we are done
                            }
                        }
                    } else {
                        QString cscope = comp_scope.trimmed();
                        doVariableReplace(cscope, place);
                        test = isActiveConfig(cscope.trimmed(), true, &place);
                    }
                    if(invert_test)
                        test = !test;
                }
            }
            if(!test && !scope_failed)
                debug_msg(1, "Project Parser: %s:%d : Test (%s) failed.", parser.file.toLatin1().constData(),
                          parser.line_no, scope.toLatin1().constData());
            if(test == or_op)
                scope_failed = !test;
            or_op = (*d == '|');

            if(*d == '{') { // scoping block
                start_block++;
                if(iterator) {
                    for(int off = 0, braces = 0; true; ++off) {
                        if(*(d+off) == '{')
                            ++braces;
                        else if(*(d+off) == '}' && braces)
                            --braces;
                        if(!braces || !*(d+off)) {
                            iterator->parser.append(QString(QByteArray(d+1, off-1)));
                            if(braces > 1)
                                iterator->scope_level += braces-1;
                            d += off-1;
                            break;
                        }
                    }
                }
            }
        } else if(!parens && *d == '}') {
            if(start_block) {
                --start_block;
            } else if(!scope_blocks.count()) {
                warn_msg(WarnParser, "Possible braces mismatch %s:%d", parser.file.toLatin1().constData(), parser.line_no);
            } else {
                if(scope_blocks.count() == 1) {
                    fprintf(stderr, "Braces mismatch %s:%d\n", parser.file.toLatin1().constData(), parser.line_no);
                    return false;
                }
                debug_msg(1, "Project Parser: %s:%d : Leaving block %d", parser.file.toLatin1().constData(),
                          parser.line_no, scope_blocks.count());
                ScopeBlock sb = scope_blocks.pop();
                if(sb.iterate)
                    sb.iterate->exec(this, place);
            }
        } else {
            var += *d;
        }
        d++;
    }
    var = var.trimmed();

    if(!else_line || (else_line && !scope_failed))
        scope_blocks.top().else_status = (!scope_failed ? ScopeBlock::TestFound : ScopeBlock::TestSeek);
    if(start_block) {
        ScopeBlock next_block(scope_failed);
        next_block.iterate = iterator;
        if(iterator)
            next_block.else_status = ScopeBlock::TestNone;
        else if(scope_failed)
            next_block.else_status = ScopeBlock::TestSeek;
        else
            next_block.else_status = ScopeBlock::TestFound;
        scope_blocks.push(next_block);
        debug_msg(1, "Project Parser: %s:%d : Entering block %d (%d). [%s]", parser.file.toLatin1().constData(),
                  parser.line_no, scope_blocks.count(), scope_failed, s.toLatin1().constData());
    } else if(iterator) {
        iterator->parser.append(var+QString(d));
        bool ret = iterator->exec(this, place);
        delete iterator;
        return ret;
    }

    if((!scope_count && !var.isEmpty()) || (scope_count == 1 && else_line))
        scope_blocks.top().else_status = ScopeBlock::TestNone;
    if(!*d) {
        if(!var.trimmed().isEmpty())
            qmake_error_msg(("Parse Error ('" + s + "')").toLatin1());
        return var.isEmpty(); // allow just a scope
    }

    SKIP_WS(d);
    for(; *d && op.indexOf('=') == -1; op += *(d++))
        ;
    op.replace(QRegExp("\\s"), "");

    SKIP_WS(d);
    QString vals(d); // vals now contains the space separated list of values
    int rbraces = vals.count('}'), lbraces = vals.count('{');
    if(scope_blocks.count() > 1 && rbraces - lbraces == 1) {
        debug_msg(1, "Project Parser: %s:%d : Leaving block %d", parser.file.toLatin1().constData(),
                  parser.line_no, scope_blocks.count());
        ScopeBlock sb = scope_blocks.pop();
        if(sb.iterate)
            sb.iterate->exec(this, place);
        vals.truncate(vals.length()-1);
    } else if(rbraces != lbraces) {
        warn_msg(WarnParser, "Possible braces mismatch {%s} %s:%d",
                 vals.toLatin1().constData(), parser.file.toLatin1().constData(), parser.line_no);
    }
    if(scope_failed)
        return true; // oh well
#undef SKIP_WS

    doVariableReplace(vals, place);
    doVariableReplace(var, place);
    var = varMap(var); //backwards compatability
    if(!var.isEmpty() && Option::mkfile::do_preprocess) {
        static QString last_file("*none*");
        if(parser.file != last_file) {
            fprintf(stdout, "#file %s:%d\n", parser.file.toLatin1().constData(), parser.line_no);
            last_file = parser.file;
        }
        fprintf(stdout, "%s %s %s\n", var.toLatin1().constData(), op.toLatin1().constData(), vals.toLatin1().constData());
    }

    // vallist is the broken up list of values
    QStringList vallist = split_value_list(vals, (var == "DEPENDPATH" || var == "INCLUDEPATH"));
    if(!vallist.filter("=").isEmpty())
        warn_msg(WarnParser, "Detected possible line continuation: {%s} %s:%d",
                 var.toLatin1().constData(), parser.file.toLatin1().constData(), parser.line_no);

    QStringList &varlist = place[var]; // varlist is the list in the symbol table
    debug_msg(1, "Project Parser: %s:%d :%s: :%s: (%s)", parser.file.toLatin1().constData(), parser.line_no,
              var.toLatin1().constData(), op.toLatin1().constData(), vallist.isEmpty() ? "" : vallist.join(" :: ").toLatin1().constData());

    // now do the operation
    if(op == "~=") {
        if(vals.length() < 4 || vals.at(0) != 's') {
            qmake_error_msg(("~= operator only can handle s/// function ('" +
                            s + "')").toLatin1());
            return false;
        }