static JSBool
HandleData(JSContext *cx, JSONParser *jp, JSONDataType type)
{
JSBool ok = JS_FALSE;
if (!STRING_BUFFER_OK(jp->buffer))
return JS_FALSE;
switch (type) {
case JSON_DATA_STRING:
ok = HandleString(cx, jp, jp->buffer->base, STRING_BUFFER_OFFSET(jp->buffer));
break;
case JSON_DATA_KEYSTRING:
js_AppendUCString(jp->objectKey, jp->buffer->base, STRING_BUFFER_OFFSET(jp->buffer));
ok = STRING_BUFFER_OK(jp->objectKey);
break;
case JSON_DATA_NUMBER:
ok = HandleNumber(cx, jp, jp->buffer->base, STRING_BUFFER_OFFSET(jp->buffer));
break;
case JSON_DATA_KEYWORD:
ok = HandleKeyword(cx, jp, jp->buffer->base, STRING_BUFFER_OFFSET(jp->buffer));
break;
default:
JS_NOT_REACHED("Should have a JSON data type");
}
js_FinishStringBuffer(jp->buffer);
js_InitStringBuffer(jp->buffer);
return ok;
}
static JSBool
PushValue(JSContext *cx, JSONParser *jp, JSObject *parent, jsval value)
{
JSAutoTempValueRooter tvr(cx, 1, &value);
JSBool ok;
if (OBJ_IS_ARRAY(cx, parent)) {
jsuint len;
ok = js_GetLengthProperty(cx, parent, &len);
if (ok) {
ok = OBJ_DEFINE_PROPERTY(cx, parent, INT_TO_JSID(len), value,
NULL, NULL, JSPROP_ENUMERATE, NULL);
}
} else {
ok = JS_DefineUCProperty(cx, parent, jp->objectKey->base,
STRING_BUFFER_OFFSET(jp->objectKey), value,
NULL, NULL, JSPROP_ENUMERATE);
js_FinishStringBuffer(jp->objectKey);
js_InitStringBuffer(jp->objectKey);
}
return ok;
}
JSBool
js_ConsumeJSONText(JSContext *cx, JSONParser *jp, const jschar *data, uint32 len)
{
uint32 i;
if (*jp->statep == JSON_PARSE_STATE_INIT) {
PushState(jp, JSON_PARSE_STATE_OBJECT_VALUE);
}
for (i = 0; i < len; i++) {
jschar c = data[i];
switch (*jp->statep) {
case JSON_PARSE_STATE_VALUE :
if (c == ']') {
// empty array
if (!PopState(jp))
return JS_FALSE;
if (*jp->statep != JSON_PARSE_STATE_ARRAY)
return JS_FALSE; // unexpected char
if (!CloseArray(cx, jp) || !PopState(jp))
return JS_FALSE;
break;
}
if (c == '}') {
// we should only find these in OBJECT_KEY state
return JS_FALSE; // unexpected failure
}
if (c == '"') {
*jp->statep = JSON_PARSE_STATE_STRING;
break;
}
if (IsNumChar(c)) {
*jp->statep = JSON_PARSE_STATE_NUMBER;
js_AppendChar(jp->buffer, c);
break;
}
if (JS7_ISLET(c)) {
*jp->statep = JSON_PARSE_STATE_KEYWORD;
js_AppendChar(jp->buffer, c);
break;
}
// fall through in case the value is an object or array
case JSON_PARSE_STATE_OBJECT_VALUE :
if (c == '{') {
*jp->statep = JSON_PARSE_STATE_OBJECT;
if (!OpenObject(cx, jp) || !PushState(jp, JSON_PARSE_STATE_OBJECT_PAIR))
return JS_FALSE;
} else if (c == '[') {
*jp->statep = JSON_PARSE_STATE_ARRAY;
if (!OpenArray(cx, jp) || !PushState(jp, JSON_PARSE_STATE_VALUE))
return JS_FALSE;
} else if (!JS_ISXMLSPACE(c)) {
return JS_FALSE; // unexpected
}
break;
case JSON_PARSE_STATE_OBJECT :
if (c == '}') {
if (!CloseObject(cx, jp) || !PopState(jp))
return JS_FALSE;
} else if (c == ',') {
if (!PushState(jp, JSON_PARSE_STATE_OBJECT_PAIR))
return JS_FALSE;
} else if (c == ']' || !JS_ISXMLSPACE(c)) {
return JS_FALSE; // unexpected
}
break;
case JSON_PARSE_STATE_ARRAY :
if (c == ']') {
if (!CloseArray(cx, jp) || !PopState(jp))
return JS_FALSE;
} else if (c == ',') {
if (!PushState(jp, JSON_PARSE_STATE_VALUE))
return JS_FALSE;
} else if (!JS_ISXMLSPACE(c)) {
return JS_FALSE; // unexpected
}
break;
case JSON_PARSE_STATE_OBJECT_PAIR :
if (c == '"') {
// we want to be waiting for a : when the string has been read
*jp->statep = JSON_PARSE_STATE_OBJECT_IN_PAIR;
if (!PushState(jp, JSON_PARSE_STATE_STRING))
return JS_FALSE;
} else if (c == '}') {
// pop off the object pair state and the object state
if (!CloseObject(cx, jp) || !PopState(jp) || !PopState(jp))
return JS_FALSE;
} else if (c == ']' || !JS_ISXMLSPACE(c)) {
return JS_FALSE; // unexpected
}
break;
case JSON_PARSE_STATE_OBJECT_IN_PAIR:
if (c == ':') {
*jp->statep = JSON_PARSE_STATE_VALUE;
} else if (!JS_ISXMLSPACE(c)) {
return JS_FALSE; // unexpected
}
break;
case JSON_PARSE_STATE_STRING:
if (c == '"') {
if (!PopState(jp))
return JS_FALSE;
JSONDataType jdt;
if (*jp->statep == JSON_PARSE_STATE_OBJECT_IN_PAIR) {
jdt = JSON_DATA_KEYSTRING;
} else {
jdt = JSON_DATA_STRING;
}
if (!HandleData(cx, jp, jdt, jp->buffer->base, STRING_BUFFER_OFFSET(jp->buffer)))
return JS_FALSE;
} else if (c == '\\') {
*jp->statep = JSON_PARSE_STATE_STRING_ESCAPE;
} else {
js_AppendChar(jp->buffer, c);
}
break;
case JSON_PARSE_STATE_STRING_ESCAPE:
switch(c) {
case '"':
case '\\':
case '/':
break;
case 'b' : c = '\b'; break;
case 'f' : c = '\f'; break;
case 'n' : c = '\n'; break;
case 'r' : c = '\r'; break;
case 't' : c = '\t'; break;
default :
if (c == 'u') {
jp->numHex = 0;
jp->hexChar = 0;
*jp->statep = JSON_PARSE_STATE_STRING_HEX;
continue;
} else {
return JS_FALSE; // unexpected
}
}
js_AppendChar(jp->buffer, c);
*jp->statep = JSON_PARSE_STATE_STRING;
break;
case JSON_PARSE_STATE_STRING_HEX:
if (('0' <= c) && (c <= '9'))
jp->hexChar = (jp->hexChar << 4) | (c - '0');
else if (('a' <= c) && (c <= 'f'))
jp->hexChar = (jp->hexChar << 4) | (c - 'a' + 0x0a);
else if (('A' <= c) && (c <= 'F'))
jp->hexChar = (jp->hexChar << 4) | (c - 'A' + 0x0a);
else
return JS_FALSE; // unexpected
if (++(jp->numHex) == 4) {
js_AppendChar(jp->buffer, jp->hexChar);
jp->hexChar = 0;
jp->numHex = 0;
*jp->statep = JSON_PARSE_STATE_STRING;
}
break;
case JSON_PARSE_STATE_KEYWORD:
if (JS7_ISLET(c)) {
js_AppendChar(jp->buffer, c);
} else {
// this character isn't part of the keyword, process it again
i--;
if(!PopState(jp))
return JS_FALSE;
if (!HandleData(cx, jp, JSON_DATA_KEYWORD, jp->buffer->base, STRING_BUFFER_OFFSET(jp->buffer)))
return JS_FALSE;
}
break;
case JSON_PARSE_STATE_NUMBER:
if (IsNumChar(c)) {
js_AppendChar(jp->buffer, c);
} else {
// this character isn't part of the number, process it again
i--;
if(!PopState(jp))
return JS_FALSE;
if (!HandleData(cx, jp, JSON_DATA_NUMBER, jp->buffer->base, STRING_BUFFER_OFFSET(jp->buffer)))
return JS_FALSE;
}
break;
case JSON_PARSE_STATE_FINISHED:
if (!JS_ISXMLSPACE(c))
return JS_FALSE; // extra input
break;
default:
JS_NOT_REACHED("Invalid JSON parser state");
}
}
return JS_TRUE;
}