private void continueNumber(CharArr arr) throws IOException {
if (arr != out) arr.write(out);
if ((nstate & HAS_EXPONENT) != 0) {
readExpDigits(arr, Integer.MAX_VALUE);
return;
}
if (nstate != 0) {
readFrac(arr, Integer.MAX_VALUE);
return;
}
for (; ; ) {
int ch = getChar();
if (ch >= '0' && ch <= '9') {
arr.write(ch);
} else if (ch == '.') {
arr.write(ch);
readFrac(arr, Integer.MAX_VALUE);
return;
} else if (ch == 'e' || ch == 'E') {
arr.write(ch);
readExp(arr, Integer.MAX_VALUE);
return;
} else {
if (ch != -1) start--;
return;
}
}
}
public static void unicodeEscape(int ch, CharArr out) {
out.write('\\');
out.write('u');
out.write(HEX_CHARS[ch >>> 12]);
out.write(HEX_CHARS[(ch >>> 8) & 0xf]);
out.write(HEX_CHARS[(ch >>> 4) & 0xf]);
out.write(HEX_CHARS[ch & 0xf]);
}
// read digits right of decimal point
private int readFrac(CharArr arr, int lim) throws IOException {
nstate = HAS_FRACTION; // deliberate set instead of '|'
while (--lim >= 0) {
int ch = getChar();
if (ch >= '0' && ch <= '9') {
arr.write(ch);
} else if (ch == 'e' || ch == 'E') {
arr.write(ch);
return readExp(arr, lim);
} else {
if (ch != -1) start--; // back up
return NUMBER;
}
}
return BIGNUMBER;
}
// call after 'e' or 'E' has been seen to read the rest of the exponent
private int readExp(CharArr arr, int lim) throws IOException {
nstate |= HAS_EXPONENT;
int ch = getChar();
lim--;
if (ch == '+' || ch == '-') {
arr.write(ch);
ch = getChar();
lim--;
}
// make sure at least one digit is read.
if (ch < '0' || ch > '9') {
throw err("missing exponent number");
}
arr.write(ch);
return readExpDigits(arr, lim);
}
/** Reads a JSON numeric value into the output. */
public void getNumberChars(CharArr output) throws IOException {
int ev = 0;
if (valstate == 0) ev = nextEvent();
if (valstate == LONG || valstate == NUMBER) output.write(this.out);
else if (valstate == BIGNUMBER) {
continueNumber(output);
} else {
throw err("Unexpected " + ev);
}
valstate = 0;
}
// continuation of readExpStart
private int readExpDigits(CharArr arr, int lim) throws IOException {
while (--lim >= 0) {
int ch = getChar();
if (ch >= '0' && ch <= '9') {
arr.write(ch);
} else {
if (ch != -1) start--; // back up
return NUMBER;
}
}
return BIGNUMBER;
}
// middle is the pointer to the middle of a buffer to start scanning for a non-string
// character ('"' or "/"). start<=middle<end
// this should be faster for strings with fewer escapes, but probably slower for many escapes.
private void readStringChars2(CharArr arr, int middle) throws IOException {
for (; ; ) {
if (middle >= end) {
arr.write(buf, start, middle - start);
start = middle;
getMore();
middle = start;
}
int ch = buf[middle++];
if (ch == '"') {
int len = middle - start - 1;
if (len > 0) arr.write(buf, start, len);
start = middle;
return;
} else if (ch == '\\') {
int len = middle - start - 1;
if (len > 0) arr.write(buf, start, len);
start = middle;
arr.write(readEscapedChar());
middle = start;
}
}
}
public static void writeStringPart(char[] val, int start, int end, CharArr out) {
for (int i = start; i < end; i++) {
char ch = val[i];
switch (ch) {
case '"':
case '\\':
out.write('\\');
out.write(ch);
break;
case '\r':
out.write('\\');
out.write('r');
break;
case '\n':
out.write('\\');
out.write('n');
break;
case '\t':
out.write('\\');
out.write('t');
break;
case '\b':
out.write('\\');
out.write('b');
break;
case '\f':
out.write('\\');
out.write('f');
break;
// case '/':
default:
if (ch <= 0x1F) {
unicodeEscape(ch, out);
} else {
// These characters are valid JSON, but not valid JavaScript
if (ch == '\u2028' || ch == '\u2029') {
unicodeEscape(ch, out);
} else {
out.write(ch);
}
}
}
}
}
public static void writeString(CharSequence val, int start, int end, CharArr out) {
out.write('"');
writeStringPart(val, start, end, out);
out.write('"');
}
public static void writeNumber(double number, CharArr out) {
out.write(Double.toString(number));
}
public static void writeNumber(float number, CharArr out) {
out.write(Float.toString(number));
}
public static void writeNumber(long number, CharArr out) {
out.write(Long.toString(number));
}
public static void writeNumber(int number, CharArr out) {
out.write(Integer.toString(number));
}
public static void writeBoolean(boolean val, CharArr out) {
out.write(val ? TRUE_CHARS : FALSE_CHARS);
}
public static void writeNull(CharArr out) {
out.write(NULL_CHARS);
}
