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json6.js
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// json6.js
// JSON for Humans. See README.md for details.
//
// This file is based off of https://github.com/d3x0r/sack ./src/netlib/html5.websocket/json6_parser.c
//
"use strict";
const version = "1.1.1";
const VALUE_UNDEFINED = -1;
const VALUE_UNSET = 0;
const VALUE_NULL = 1;
const VALUE_TRUE = 2;
const VALUE_FALSE = 3;
const VALUE_STRING = 4;
const VALUE_NUMBER = 5;
const VALUE_OBJECT = 6;
const VALUE_ARRAY = 7;
const VALUE_NEG_NAN = 8;
const VALUE_NAN = 9;
const VALUE_NEG_INFINITY = 10;
const VALUE_INFINITY = 11;
// const VALUE_DATE = 12 // unused yet
const VALUE_EMPTY = 13; // [,] makes an array with 'empty item'
const WORD_POS_RESET = 0;
const WORD_POS_TRUE_1 = 1;
const WORD_POS_TRUE_2 = 2;
const WORD_POS_TRUE_3 = 3;
const WORD_POS_FALSE_1 = 5;
const WORD_POS_FALSE_2 = 6;
const WORD_POS_FALSE_3 = 7;
const WORD_POS_FALSE_4 = 8;
const WORD_POS_NULL_1 = 9;
const WORD_POS_NULL_2 = 10;
const WORD_POS_NULL_3 = 11;
const WORD_POS_UNDEFINED_1 = 12;
const WORD_POS_UNDEFINED_2 = 13;
const WORD_POS_UNDEFINED_3 = 14;
const WORD_POS_UNDEFINED_4 = 15;
const WORD_POS_UNDEFINED_5 = 16;
const WORD_POS_UNDEFINED_6 = 17;
const WORD_POS_UNDEFINED_7 = 18;
const WORD_POS_UNDEFINED_8 = 19;
const WORD_POS_NAN_1 = 20;
const WORD_POS_NAN_2 = 21;
const WORD_POS_INFINITY_1 = 22;
const WORD_POS_INFINITY_2 = 23;
const WORD_POS_INFINITY_3 = 24;
const WORD_POS_INFINITY_4 = 25;
const WORD_POS_INFINITY_5 = 26;
const WORD_POS_INFINITY_6 = 27;
const WORD_POS_INFINITY_7 = 28;
const WORD_POS_FIELD = 29;
const WORD_POS_AFTER_FIELD = 30;
const WORD_POS_END = 31;
const CONTEXT_UNKNOWN = 0;
const CONTEXT_IN_ARRAY = 1;
// const CONTEXT_IN_OBJECT = 2
const CONTEXT_OBJECT_FIELD = 3;
const CONTEXT_OBJECT_FIELD_VALUE = 4;
const contexts = [];
function getContext() {
return contexts.pop() || {
context : CONTEXT_UNKNOWN,
elements : null,
element_array : null
};
}
function dropContext(ctx) {
contexts.push( ctx );
}
const buffers = [];
function getBuffer() {
let buf = buffers.pop();
if( !buf ) buf = { buf:null, n:0 };
else buf.n = 0;
return buf;
}
function dropBuffer(buf) {
buffers.push( buf );
}
const JSON6 = typeof exports === 'object'
? exports
// istanbul ignore next
: {};
/*
let _DEBUG_LL = true;
let _DEBUG_PARSING = true;
let _DEBUG_PARSING_STACK = true;
const log = function(type) {
if (type === '_DEBUG_PARSING' && !_DEBUG_PARSING) {
return;
}
if (type === '_DEBUG_PARSING_STACK' && !_DEBUG_PARSING_STACK) {
return;
}
if (type === '_DEBUG_LL' && !_DEBUG_LL) {
return;
}
console.log.apply(console, [].slice.call(arguments, 1));
};
*/
JSON6.escape = function(string) {
let output = '';
if( !string ) return string;
for( let n = 0; n < string.length; n++ ) {
const ch = string[n];
if( ( ch == '"' ) || ( ch == '\\' ) || ( ch == '`' )|| ( ch == '\'' )) {
output += '\\';
}
output += ch;
}
return output;
};
JSON6.begin = function( cb, reviver ) {
const val = { name : null, // name of this value (if it's contained in an object)
value_type: VALUE_UNSET, // value from above indiciating the type of this value
string : '', // the string value of this value (strings and number types only)
contains : null,
};
const pos = { line:1, col:1 };
let n = 0;
let word = WORD_POS_RESET,
status = true,
negative = false,
result = null,
elements = undefined,
element_array = [],
parse_context = CONTEXT_UNKNOWN,
comment = 0,
fromHex = false,
decimal = false,
exponent = false,
exponent_sign = false,
exponent_digit = false,
gatheringStringFirstChar = null,
gatheringString = false,
gatheringNumber = false,
stringEscape = false,
cr_escaped = false,
unicodeWide = false,
stringUnicode = false,
stringHex = false,
hex_char = 0,
hex_char_len = 0,
completed = false
;
const context_stack = {
first : null,
last : null,
saved : null,
push(node) {
let recover = this.saved;
if( recover ) { this.saved = recover.next; recover.node = node; recover.next = null; recover.prior = this.last; }
else { recover = { node : node, next : null, prior : this.last }; }
if( !this.last ) this.first = recover;
this.last = recover;
},
pop() {
const result = this.last;
if( !(this.last = result.prior ) ) this.first = null;
result.next = this.saved; this.saved = result;
return result.node;
}
};
const inQueue = {
first : null,
last : null,
saved : null,
push(node) {
let recover = this.saved;
if( recover ) {this.saved = recover.next; recover.node = node; recover.next = null; recover.prior = this.last; }
else { recover = { node : node, next : null, prior : this.last }; }
if( !this.last ) this.first = recover;
else this.last.next = recover;
this.last = recover;
},
shift() {
const result = this.first;
if( !result ) return null;
this.first = result.next;
if( !this.first ) this.last = null;
result.next = this.saved;
this.saved = result;
// node is in saved...
return result.node;
},
unshift(node) {
// usage in this module, recover will ALWAYS have a saved to use.
const recover = this.saved;
//if( recover ) {
this.saved = recover.next; recover.node = node; recover.next = this.first; recover.prior = null;
//} else { recover = { node : node, next : this.first, prior : null }; }
if( !this.first ) this.last = recover;
this.first = recover;
}
};
function throwEndError( leader /* , c */ ) {
throw new Error( `${leader} at ${n} [${pos.line}:${pos.col}]`);
}
return {
finalError() {
if( comment !== 0 ) { // most of the time everything's good.
switch (comment) {
case 1:
return throwEndError( "Comment began at end of document" );
case 2:
console.log( "Warning: '//' comment without end of line ended document" );
break;
case 3:
return throwEndError( "Open comment '/*' is missing close at end of document" );
case 4:
return throwEndError( "Incomplete '/* *' close at end of document" );
}
}
if( gatheringString ) throwEndError( "Incomplete string" );
},
value() {
this.finalError();
const r = result;
result = undefined;
return r;
},
reset() {
word = WORD_POS_RESET;
status = true;
if( inQueue.last ) inQueue.last.next = inQueue.save;
inQueue.save = inQueue.first;
inQueue.first = inQueue.last = null;
if( context_stack.last ) context_stack.last.next = context_stack.save;
context_stack.save = inQueue.first;
context_stack.first = context_stack.last = null;//= [];
element_array = null;
elements = undefined;
parse_context = CONTEXT_UNKNOWN;
val.value_type = VALUE_UNSET;
val.name = null;
val.string = '';
pos.line = 1;
pos.col = 1;
negative = false;
comment = 0;
completed = false;
gatheringString = false;
stringEscape = false; // string stringEscape intro
cr_escaped = false; // carraige return escaped
//stringUnicode = false; // reading \u
//unicodeWide = false; // reading \u{} in string
//stringHex = false; // reading \x in string
},
write(msg) {
let retcode;
if( msg !== undefined && typeof msg !== "string") msg = String(msg);
if( !status ) throw new Error( "Parser is in an error state, please reset." );
for( retcode = this._write(msg,false); retcode > 0; retcode = this._write() ) {
this.finalError();
if( typeof reviver === 'function' ) (function walk(holder, key) {
const value = holder[key];
if (value && typeof value === 'object') {
for (const k in value) {
if (Object.prototype.hasOwnProperty.call(value, k)) {
const v = walk(value, k);
if (v !== undefined) {
value[k] = v;
} else {
delete value[k];
}
}
}
}
return reviver.call(holder, key, value);
}({'': result}, ''));
cb( result );
result = undefined;
if( retcode < 2 )
break;
}
if( retcode )
this.finalError();
},
_write(msg,complete_at_end) {
let input;
let buf;
let retval = 0;
function throwError( leader, c ) {
throw new Error( `${leader} '${String.fromCodePoint( c )}' unexpected at ${n} (near '${buf.substr(n>4?(n-4):0,n>4?3:(n-1))}[${String.fromCodePoint( c )}]${buf.substr(n, 10)}') [${pos.line}:${pos.col}]`);
}
function RESET_VAL() {
val.value_type = VALUE_UNSET;
val.string = '';
}
function arrayPush() {
switch( val.value_type ){
case VALUE_NUMBER:
element_array.push( (negative?-1:1) * Number( val.string ) );
break;
case VALUE_STRING:
element_array.push( val.string );
break;
case VALUE_TRUE:
element_array.push( true );
break;
case VALUE_FALSE:
element_array.push( false );
break;
case VALUE_NEG_NAN:
element_array.push( -NaN );
break;
case VALUE_NAN:
element_array.push( NaN );
break;
case VALUE_NEG_INFINITY:
element_array.push( -Infinity );
break;
case VALUE_INFINITY:
element_array.push( Infinity );
break;
case VALUE_NULL:
element_array.push( null );
break;
case VALUE_UNDEFINED:
element_array.push( undefined );
break;
case VALUE_EMPTY:
element_array.push( undefined );
delete element_array[element_array.length-1];
break;
case VALUE_OBJECT:
element_array.push( val.contains );
break;
case VALUE_ARRAY:
element_array.push( val.contains );
break;
}
}
function objectPush() {
switch( val.value_type ){
case VALUE_NUMBER:
elements[val.name] = ((negative?-1:1) * Number( val.string ));
break;
case VALUE_STRING:
elements[val.name] = ( val.string );
break;
case VALUE_TRUE:
elements[val.name] = ( true );
break;
case VALUE_FALSE:
elements[val.name] = ( false );
break;
case VALUE_NEG_NAN:
elements[val.name] = ( -NaN );
break;
case VALUE_NAN:
elements[val.name] = ( NaN );
break;
case VALUE_NEG_INFINITY:
elements[val.name] = ( -Infinity );
break;
case VALUE_INFINITY:
elements[val.name] = ( Infinity );
break;
case VALUE_NULL:
elements[val.name] = ( null );
break;
case VALUE_UNDEFINED:
elements[val.name] = ( undefined );
break;
case VALUE_OBJECT:
elements[val.name] = val.contains;
break;
case VALUE_ARRAY:
elements[val.name] = val.contains;
break;
}
}
function gatherString( start_c ) {
let retval = 0;
while( retval == 0 && ( n < buf.length ) ) {
let str = buf.charAt(n);
const cInt = buf.codePointAt(n++);
if( cInt >= 0x10000 ) { str += buf.charAt(n); n++; }
//console.log( "gathering....", stringEscape, str, cInt, unicodeWide, stringHex, stringUnicode, hex_char_len );
pos.col++;
if( cInt == start_c ) {//( cInt == 34/*'"'*/ ) || ( cInt == 39/*'\''*/ ) || ( cInt == 96/*'`'*/ ) )
if( stringEscape ) {
if( stringHex )
throwError( "Incomplete hexidecimal sequence", cInt );
else if( unicodeWide )
throwError( "Incomplete long unicode sequence", cInt );
else if( stringUnicode )
throwError( "Incomplete unicode sequence", cInt );
if( cr_escaped ) {
cr_escaped = false; // \\ \r ' :end string, the backslash was used for \r
retval = 1; // complete string.
} else val.string += str; // escaped start quote
stringEscape = false;
}
else {
// quote matches, not escaped, and not processing escape...
retval = 1;
}
}
else if( stringEscape ) {
if( unicodeWide ) {
if( cInt == 125/*'}'*/ ) {
val.string += String.fromCodePoint( hex_char );
unicodeWide = false;
stringUnicode = false;
stringEscape = false;
continue;
}
hex_char *= 16;
if( cInt >= 48/*'0'*/ && cInt <= 57/*'9'*/ ) hex_char += cInt - 0x30;
else if( cInt >= 65/*'A'*/ && cInt <= 70/*'F'*/ ) hex_char += ( cInt - 65 ) + 10;
else if( cInt >= 97/*'a'*/ && cInt <= 102/*'f'*/ ) hex_char += ( cInt - 97 ) + 10;
else {
throwError( "(escaped character, parsing hex of \\u)", cInt );
}
continue;
}
else if( stringHex || stringUnicode ) {
if( hex_char_len === 0 && cInt === 123/*'{'*/ ) {
unicodeWide = true;
continue;
}
hex_char *= 16;
if( cInt >= 48/*'0'*/ && cInt <= 57/*'9'*/ ) hex_char += cInt - 0x30;
else if( cInt >= 65/*'A'*/ && cInt <= 70/*'F'*/ ) hex_char += ( cInt - 65 ) + 10;
else if( cInt >= 97/*'a'*/ && cInt <= 102/*'f'*/ ) hex_char += ( cInt - 97 ) + 10;
else {
throwError( stringUnicode?"(escaped character, parsing hex of \\u)":"(escaped character, parsing hex of \\x)", cInt );
}
hex_char_len++;
if( stringUnicode ) {
if( hex_char_len == 4 ) {
val.string += String.fromCodePoint( hex_char );
stringUnicode = false;
stringEscape = false;
}
}
else if( hex_char_len == 2 ) {
val.string += String.fromCodePoint( hex_char );
stringHex = false;
stringEscape = false;
}
continue;
}
switch( cInt ) {
case 13/*'\r'*/:
cr_escaped = true;
pos.col = 1;
continue;
case 0x2028: // LS (Line separator)
case 0x2029: // PS (paragraph separator)
pos.col = 1; // no return to get newline reset, so reset line pos.
// Fallthrough
case 10/*'\n'*/:
if( cr_escaped ) {
// \\ \r \n
cr_escaped = false;
} else {
// \\ \n
pos.col = 1;
}
pos.line++;
break;
case 116/*'t'*/:
val.string += '\t';
break;
case 98/*'b'*/:
val.string += '\b';
break;
case 48/*'0'*/:
val.string += '\0';
break;
case 110/*'n'*/:
val.string += '\n';
break;
case 114/*'r'*/:
val.string += '\r';
break;
case 102/*'f'*/:
val.string += '\f';
break;
case 118/*'v'*/:
val.string += '\v';
break;
case 120/*'x'*/:
stringHex = true;
hex_char_len = 0;
hex_char = 0;
continue;
case 117/*'u'*/:
stringUnicode = true;
hex_char_len = 0;
hex_char = 0;
continue;
default:
val.string += str;
break;
}
//console.log( "other..." );
stringEscape = false;
}
else if( cInt === 92/*'\\'*/ ) {
stringEscape = true;
}
else {
if( cr_escaped ) {
cr_escaped = false;
// \\ \r <any other character>
pos.line++;
pos.col = 2; // newline, plus one character.
}
val.string += str;
}
}
return retval;
}
function collectNumber() {
let _n;
while( (_n = n) < buf.length ) {
const str = buf.charAt(_n);
const cInt = buf.codePointAt(n++);
if( cInt >= 0x10000 ) {
throwError( "fault while parsing number;", cInt );
}
//log('_DEBUG_PARSING', "in getting number:", n, cInt, String.fromCodePoint(cInt) );
if( cInt == 95 /*_*/ )
continue;
pos.col++;
// leading zeros should be forbidden.
if( cInt >= 48/*'0'*/ && cInt <= 57/*'9'*/ ) {
if( exponent ) {
exponent_digit = true;
}
val.string += str;
} else if( cInt == 45/*'-'*/ || cInt == 43/*'+'*/ ) {
if( val.string.length == 0 || ( exponent && !exponent_sign && !exponent_digit ) ) {
val.string += str;
exponent_sign = true;
} else {
status = false;
throwError( "fault while parsing number;", cInt );
// break;
}
} else if( cInt == 46/*'.'*/ ) {
if( !decimal && !fromHex && !exponent ) {
val.string += str;
decimal = true;
} else {
status = false;
throwError( "fault while parsing number;", cInt );
// break;
}
} else if( fromHex && ( ( ( cInt >= 95/*'a'*/ ) && ( cInt <= 102/*'f'*/ ) ) ||
( ( cInt >= 65/*'A'*/ ) && ( cInt <= 70/*'F'*/ ) ) ) ) {
val.string += str;
} else if( cInt == 120/*'x'*/ || cInt == 98/*'b'*/ || cInt == 111/*'o'*/
|| cInt == 88/*'X'*/ || cInt == 66/*'B'*/ || cInt == 79/*'O'*/ ) {
// hex conversion.
if( !fromHex && val.string == '0' ) {
fromHex = true;
val.string += str;
}
else {
status = false;
throwError( "fault while parsing number;", cInt );
// break;
}
} else if( ( cInt == 101/*'e'*/ ) || ( cInt == 69/*'E'*/ ) ) {
if( !exponent ) {
val.string += str;
exponent = true;
} else {
status = false;
throwError( "fault while parsing number;", cInt );
// break;
}
} else {
if( cInt == 32/*' '*/ || cInt == 160/*   */ || cInt == 13 || cInt == 10 || cInt == 9
|| cInt == 0xFEFF || cInt == 44/*','*/ || cInt == 125/*'}'*/ || cInt == 93/*']'*/
|| cInt == 58/*':'*/ ) {
break;
}
else {
if( complete_at_end ) {
status = false;
throwError( "fault while parsing number;", cInt );
}
break;
}
}
}
n = _n;
if( (!complete_at_end) && n == buf.length ) {
gatheringNumber = true;
}
else {
gatheringNumber = false;
val.value_type = VALUE_NUMBER;
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
}
}
if( !status )
return -1;
if( msg && msg.length ) {
input = getBuffer();
input.buf = msg;
inQueue.push( input );
} else {
if( gatheringNumber ) {
//console.log( "Force completed.")
gatheringNumber = false;
val.value_type = VALUE_NUMBER;
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
} else {
throw new Error( "context stack is not empty at flush" );
}
retval = 1; // if returning buffers, then obviously there's more in this one.
}
}
while( status && ( input = inQueue.shift() ) ) {
n = input.n;
buf = input.buf;
if( gatheringString ) {
const string_status = gatherString( gatheringStringFirstChar );
if( string_status > 0 ) {
gatheringString = false;
val.value_type = VALUE_STRING;
}
}
if( gatheringNumber ) {
collectNumber();
}
while( !completed && status && ( n < buf.length ) ) {
let str = buf.charAt(n);
const cInt = buf.codePointAt(n++);
if( cInt >= 0x10000 ) { str += buf.charAt(n); n++; }
//// log('_DEBUG_PARSING', "parsing at ", cInt, str );
//log('_DEBUG_LL', "processing: ", cInt, str, pos, comment, parse_context, word, val );
pos.col++;
if( comment ) { // '/'
if( comment == 1 ) { // '/'
if( cInt == 42/*'*'*/ ) { comment = 3; } // '/*'
else if( cInt != 47/*'/'*/ ) { // '//'(NOT)
throwError( "fault while parsing;", cInt );
}
else comment = 2; // '//' (valid)
}
else if( comment == 2 ) { // '// ...'
if( cInt == 10/*'\n'*/
|| cInt == 13/*'\r'*/ ) comment = 0;
}
else if( comment == 3 ){ // '/*... '
if( cInt == 42/*'*'*/ ) comment = 4;
}
else { // if( comment == 4 ) { // '/* ... *'
if( cInt == 47/*'/'*/ ) comment = 0;
else comment = 3; // any other char, goto expect * to close */
}
continue;
}
switch( cInt ) {
case 47/*'/'*/:
comment = 1;
break;
case 123/*'{'*/:
if( word == WORD_POS_FIELD || word == WORD_POS_AFTER_FIELD || ( parse_context == CONTEXT_OBJECT_FIELD && word == WORD_POS_RESET ) ) {
throwError( "fault while parsing; getting field name unexpected ", cInt );
// break;
}
{
const old_context = getContext();
//log('_DEBUG_PARSING', "Begin a new object; previously pushed into elements; but wait until trailing comma or close previously:%d", val.value_type );
val.value_type = VALUE_OBJECT;
const tmpobj = {};
if( parse_context == CONTEXT_UNKNOWN )
result = elements = tmpobj;
old_context.context = parse_context;
old_context.elements = elements;
old_context.element_array = element_array;
old_context.name = val.name;
elements = tmpobj;
//log('_DEBUG_PARSING_STACK',"push context (open object): ", context_stack.length );
context_stack.push( old_context );
RESET_VAL();
parse_context = CONTEXT_OBJECT_FIELD;
}
break;
case 91/*'['*/:
if( parse_context == CONTEXT_OBJECT_FIELD || word == WORD_POS_FIELD || word == WORD_POS_AFTER_FIELD ) {
throwError( "Fault while parsing; while getting field name unexpected", cInt );
// break;
}
if( val.value_type == VALUE_UNSET || val.value_type == VALUE_UNDEFINED )
{
const old_context = getContext();
//log('_DEBUG_PARSING', "Begin a new array; previously pushed into elements; but wait until trailing comma or close previously:%d", val.value_type );
val.value_type = VALUE_ARRAY;
const tmparr = [];
if( parse_context == CONTEXT_UNKNOWN )
result = element_array = tmparr;
//else if( parse_context == CONTEXT_IN_ARRAY )
// element_array.push( tmparr );
else if( parse_context == CONTEXT_OBJECT_FIELD_VALUE )
elements[val.name] = tmparr;
old_context.context = parse_context;
old_context.elements = elements;
old_context.element_array = element_array;
old_context.name = val.name;
element_array = tmparr;
//log('_DEBUG_PARSING_STACK', "push context (open array): ", context_stack.length );
context_stack.push( old_context );
RESET_VAL();
parse_context = CONTEXT_IN_ARRAY;
} else {
throwError( "Unexpected array open after previous value", cInt );
}
break;
case 58/*':'*/:
////log('_DEBUG_PARSING', "colon context:", parse_context );
if( parse_context == CONTEXT_OBJECT_FIELD ) {
word = WORD_POS_RESET;
val.name = val.string;
val.string = '';
parse_context = CONTEXT_OBJECT_FIELD_VALUE;
val.value_type = VALUE_UNSET;
}
else {
if( parse_context == CONTEXT_IN_ARRAY )
throwError( "(in array, got colon out of string):parsing fault;", cInt );
else
throwError( "(outside any object, got colon out of string):parsing fault;", cInt );
}
break;
case 125/*'}'*/:
////log('_DEBUG_PARSING', "close bracket context:", word, parse_context );
if( word == WORD_POS_END ) {
// allow starting a new word
word = WORD_POS_RESET;
}
// coming back after pushing an array or sub-object will reset the context to FIELD, so an end with a field should still push value.
if( ( parse_context == CONTEXT_OBJECT_FIELD ) ) {
//log('_DEBUG_PARSING', "close object; empty object %d", val.value_type );
//RESET_VAL();
val.value_type = VALUE_OBJECT;
val.contains = elements;
const old_context = context_stack.pop();
//log('_DEBUG_PARSING_STACK',"object pop stack (close obj)", context_stack.length, old_context );
val.name = old_context.name;
parse_context = old_context.context; // this will restore as IN_ARRAY or OBJECT_FIELD
elements = old_context.elements;
element_array = old_context.element_array;
dropContext( old_context );
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
}
else if( ( parse_context == CONTEXT_OBJECT_FIELD_VALUE ) ) {
// first, add the last value
//log('_DEBUG_PARSING', "close object; push item '%s' %d", val.name, val.value_type );
if( val.value_type != VALUE_UNSET ) {
objectPush();
} else {
throwError( "Fault while parsing field value, close with no value", cInt );
}
val.value_type = VALUE_OBJECT;
val.contains = elements;
const old_context = context_stack.pop();
//log('_DEBUG_PARSING_STACK',"object pop stack (close object)", context_stack.length, old_context );
val.name = old_context.name;
parse_context = old_context.context; // this will restore as IN_ARRAY or OBJECT_FIELD
elements = old_context.elements;
element_array = old_context.element_array;
dropContext( old_context );
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
}
else {
throwError( "Fault while parsing; unexpected", cInt );
}
negative = false;
break;
case 93/*']'*/:
if( word == WORD_POS_END ) word = WORD_POS_RESET;
if( parse_context == CONTEXT_IN_ARRAY ) {
//log('_DEBUG_PARSING', "close array, push last element: %d", val.value_type );
if( val.value_type != VALUE_UNSET ) {
arrayPush();
}
val.value_type = VALUE_ARRAY;
val.contains = element_array;
{
const old_context = context_stack.pop();
//log('_DEBUG_PARSING_STACK',"object pop stack (close array)", context_stack.length );
val.name = old_context.name;
parse_context = old_context.context;
elements = old_context.elements;
element_array = old_context.element_array;
dropContext( old_context );
}
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
}
else {
throwError( `bad context ${parse_context}; fault while parsing`, cInt );// fault
}
negative = false;
break;
case 44/*','*/:
if( word == WORD_POS_END ) word = WORD_POS_RESET; // allow collect new keyword
//log('_DEBUG_PARSING', "comma context:", parse_context, val );
if( parse_context == CONTEXT_IN_ARRAY ) {
if( val.value_type == VALUE_UNSET )
val.value_type = VALUE_EMPTY; // in an array, elements after a comma should init as undefined...
//log('_DEBUG_PARSING', "back in array; push item %d", val.value_type );
arrayPush();
RESET_VAL();
// undefined allows [,,,] to be 4 values and [1,2,3,] to be 4 values with an undefined at end.
}
else if( parse_context == CONTEXT_OBJECT_FIELD_VALUE ) {
// after an array value, it will have returned to OBJECT_FIELD anyway
//log('_DEBUG_PARSING', "comma after field value, push field to object: %s", val.name );
parse_context = CONTEXT_OBJECT_FIELD;
if( val.value_type != VALUE_UNSET ) {
objectPush();
RESET_VAL();
}else
throwError( "Unexpected comma after object field name", cInt );
}
else {
status = false;
throwError( "bad context; excessive commas while parsing;", cInt );// fault
}
negative = false;
break;
default:
if( parse_context == CONTEXT_OBJECT_FIELD ) {
switch( cInt ) {
case 96://'`':
case 34://'"':
case 39://'\'':
if( word == WORD_POS_RESET ) {
if( val.value_type != VALUE_UNSET )
throwError( "String begin after previous value", cInt );
const string_status = gatherString(cInt );
//log('_DEBUG_PARSING', "string gather for object field name :", val.string, string_status );
if( string_status ) {
val.value_type = VALUE_STRING;
} else {
gatheringStringFirstChar = cInt;
gatheringString = true;
}
} else {
throwError( "fault while parsing; quote not at start of field name", cInt );
}
break;
case 10://'\n':
pos.line++;
pos.col = 1;
// fall through to normal space handling - just updated line/col position
case 13://'\r':
case 32://' ':
case 160:// :
case 9://'\t':
case 0xFEFF: // ZWNBS is WS though
if( word == WORD_POS_END ) { // allow collect new keyword
word = WORD_POS_RESET;
}
else if( word == WORD_POS_FIELD ) {
word = WORD_POS_AFTER_FIELD;
}
// skip whitespace
break;
default:
if( word == WORD_POS_AFTER_FIELD ) {
status = false;
throwError( "fault while parsing; character unexpected", cInt );
}
if( word == WORD_POS_RESET ) word = WORD_POS_FIELD;
val.string += str;
break; // default
}
}
else switch( cInt ) {
case 96://'`':
case 34://'"':
case 39: {//'\'':
if( val.value_type === VALUE_UNSET ) {
const string_status = gatherString( cInt );
//log('_DEBUG_PARSING', "string gather for object field value :", val.string, string_status, completed, input.n, buf.length );
if( string_status ) {
val.value_type = VALUE_STRING;
word = WORD_POS_END;
} else {
gatheringStringFirstChar = cInt;
gatheringString = true;
}
}else throwError( "String unexpected", cInt );
break;
}
case 10://'\n':
pos.line++;
pos.col = 1;
// Fallthrough
case 32://' ':
case 160://  
case 9://'\t':
case 13://'\r':
case 0xFEFF://'\uFEFF':
if( word == WORD_POS_END ) {
word = WORD_POS_RESET;
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
break;
}
if( word !== WORD_POS_RESET ) { // breaking in the middle of gathering a keyword.
status = false;
throwError( "fault parsing whitespace", cInt );
}
break;
//----------------------------------------------------------
// catch characters for true/false/null/undefined which are values outside of quotes
case 116://'t':
if( word == WORD_POS_RESET ) word = WORD_POS_TRUE_1;
else if( word == WORD_POS_INFINITY_6 ) word = WORD_POS_INFINITY_7;
else { status = false; throwError( "fault parsing", cInt ); }// fault
break;
case 114://'r':
if( word == WORD_POS_TRUE_1 ) word = WORD_POS_TRUE_2;
else { status = false; throwError( "fault parsing", cInt ); }// fault
break;
case 117://'u':
if( word == WORD_POS_TRUE_2 ) word = WORD_POS_TRUE_3;
else if( word == WORD_POS_NULL_1 ) word = WORD_POS_NULL_2;
else if( word == WORD_POS_RESET ) word = WORD_POS_UNDEFINED_1;
else { status = false; throwError( "fault parsing", cInt ); }// fault
break;
case 101://'e':
if( word == WORD_POS_TRUE_3 ) {
val.value_type = VALUE_TRUE;
word = WORD_POS_END;
} else if( word == WORD_POS_FALSE_4 ) {
val.value_type = VALUE_FALSE;
word = WORD_POS_END;
} else if( word == WORD_POS_UNDEFINED_3 ) word = WORD_POS_UNDEFINED_4;
else if( word == WORD_POS_UNDEFINED_7 ) word = WORD_POS_UNDEFINED_8;
else { status = false; throwError( "fault parsing", cInt ); }// fault
break;
case 110://'n':
if( word == WORD_POS_RESET ) word = WORD_POS_NULL_1;
else if( word == WORD_POS_UNDEFINED_1 ) word = WORD_POS_UNDEFINED_2;