protected float parseFloat()

in batik-parser/src/main/java/org/apache/batik/parser/NumberParser.java [34:209]

• 162 lines of code
• 138 McCabe index (conditional complexity)

    protected float parseFloat() throws ParseException, IOException {
        int     mant     = 0;
        int     mantDig  = 0;
        boolean mantPos  = true;
        boolean mantRead = false;

        int     exp      = 0;
        int     expDig   = 0;
        int     expAdj   = 0;
        boolean expPos   = true;

        switch (current) {
        case '-':
            mantPos = false;
            // fallthrough
        case '+':
            current = reader.read();
        }

        m1: switch (current) {
        default:
            reportUnexpectedCharacterError( current );
            return 0.0f;

        case '.':
            break;

        case '0':
            mantRead = true;
            l: for (;;) {
                current = reader.read();
                switch (current) {
                case '1': case '2': case '3': case '4':
                case '5': case '6': case '7': case '8': case '9':
                    break l;
                case '.': case 'e': case 'E':
                    break m1;
                default:
                    return 0.0f;
                case '0':
                }
            }

        case '1': case '2': case '3': case '4':
        case '5': case '6': case '7': case '8': case '9':
            mantRead = true;
            l: for (;;) {
                if (mantDig < 9) {
                    mantDig++;
                    mant = mant * 10 + (current - '0');
                } else {
                    expAdj++;
                }
                current = reader.read();
                switch (current) {
                default:
                    break l;
                case '0': case '1': case '2': case '3': case '4':
                case '5': case '6': case '7': case '8': case '9':
                }
            }
        }

        if (current == '.') {
            current = reader.read();
            m2: switch (current) {
            default:
            case 'e': case 'E':
                if (!mantRead) {
                    reportUnexpectedCharacterError( current );
                    return 0.0f;
                }
                break;

            case '0':
                if (mantDig == 0) {
                    l: for (;;) {
                        current = reader.read();
                        expAdj--;
                        switch (current) {
                        case '1': case '2': case '3': case '4':
                        case '5': case '6': case '7': case '8': case '9':
                            break l;
                        default:
                            if (!mantRead) {
                                return 0.0f;
                            }
                            break m2;
                        case '0':
                        }
                    }
                }
            case '1': case '2': case '3': case '4':
            case '5': case '6': case '7': case '8': case '9':
                l: for (;;) {
                    if (mantDig < 9) {
                        mantDig++;
                        mant = mant * 10 + (current - '0');
                        expAdj--;
                    }
                    current = reader.read();
                    switch (current) {
                    default:
                        break l;
                    case '0': case '1': case '2': case '3': case '4':
                    case '5': case '6': case '7': case '8': case '9':
                    }
                }
            }
        }

        switch (current) {
        case 'e': case 'E':
            current = reader.read();
            switch (current) {
            default:
                reportUnexpectedCharacterError( current );
                return 0f;
            case '-':
                expPos = false;
            case '+':
                current = reader.read();
                switch (current) {
                default:
                    reportUnexpectedCharacterError( current );
                    return 0f;
                case '0': case '1': case '2': case '3': case '4':
                case '5': case '6': case '7': case '8': case '9':
                }
            case '0': case '1': case '2': case '3': case '4':
            case '5': case '6': case '7': case '8': case '9':
            }

            en: switch (current) {
            case '0':
                l: for (;;) {
                    current = reader.read();
                    switch (current) {
                    case '1': case '2': case '3': case '4':
                    case '5': case '6': case '7': case '8': case '9':
                        break l;
                    default:
                        break en;
                    case '0':
                    }
                }

            case '1': case '2': case '3': case '4':
            case '5': case '6': case '7': case '8': case '9':
                l: for (;;) {
                    if (expDig < 3) {
                        expDig++;
                        exp = exp * 10 + (current - '0');
                    }
                    current = reader.read();
                    switch (current) {
                    default:
                        break l;
                    case '0': case '1': case '2': case '3': case '4':
                    case '5': case '6': case '7': case '8': case '9':
                    }
                }
            }
        default:
        }

        if (!expPos) {
            exp = -exp;
        }
        exp += expAdj;
        if (!mantPos) {
            mant = -mant;
        }

        return buildFloat(mant, exp);
    }