mirror of
https://github.com/godotengine/godot.git
synced 2025-10-25 18:54:43 +00:00
477 lines
10 KiB
C++
477 lines
10 KiB
C++
/*************************************************************************/
|
|
/* json.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* http://www.godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
#include "json.h"
|
|
#include "print_string.h"
|
|
|
|
const char * JSON::tk_name[TK_MAX] = {
|
|
"'{'",
|
|
"'}'",
|
|
"'['",
|
|
"']'",
|
|
"identifier",
|
|
"string",
|
|
"number",
|
|
"':'",
|
|
"','",
|
|
"EOF",
|
|
};
|
|
|
|
|
|
|
|
String JSON::_print_var(const Variant& p_var) {
|
|
|
|
switch(p_var.get_type()) {
|
|
|
|
case Variant::NIL: return "null";
|
|
case Variant::BOOL: return p_var.operator bool() ? "true": "false";
|
|
case Variant::INT: return itos(p_var);
|
|
case Variant::REAL: return rtos(p_var);
|
|
case Variant::INT_ARRAY:
|
|
case Variant::REAL_ARRAY:
|
|
case Variant::STRING_ARRAY:
|
|
case Variant::ARRAY: {
|
|
|
|
String s = "[";
|
|
Array a = p_var;
|
|
for(int i=0;i<a.size();i++) {
|
|
if (i>0)
|
|
s+=", ";
|
|
s+=_print_var(a[i]);
|
|
}
|
|
s+="]";
|
|
return s;
|
|
};
|
|
case Variant::DICTIONARY: {
|
|
|
|
String s = "{";
|
|
Dictionary d = p_var;
|
|
List<Variant> keys;
|
|
d.get_key_list(&keys);
|
|
|
|
for (List<Variant>::Element *E=keys.front();E;E=E->next()) {
|
|
|
|
if (E!=keys.front())
|
|
s+=", ";
|
|
s+=_print_var(String(E->get()));
|
|
s+=":";
|
|
s+=_print_var(d[E->get()]);
|
|
}
|
|
|
|
s+="}";
|
|
return s;
|
|
};
|
|
default: return "\""+String(p_var).json_escape()+"\"";
|
|
|
|
}
|
|
|
|
}
|
|
|
|
String JSON::print(const Dictionary& p_dict) {
|
|
|
|
return _print_var(p_dict);
|
|
}
|
|
|
|
|
|
Error JSON::_get_token(const CharType *p_str, int &idx, int p_len, Token& r_token,int &line,String &r_err_str) {
|
|
|
|
while (true) {
|
|
switch(p_str[idx]) {
|
|
|
|
case '\n': {
|
|
|
|
line++;
|
|
idx++;
|
|
break;
|
|
};
|
|
case 0: {
|
|
r_token.type=TK_EOF;
|
|
return OK;
|
|
} break;
|
|
case '{': {
|
|
|
|
r_token.type=TK_CURLY_BRACKET_OPEN;
|
|
idx++;
|
|
return OK;
|
|
};
|
|
case '}': {
|
|
|
|
r_token.type=TK_CURLY_BRACKET_CLOSE;
|
|
idx++;
|
|
return OK;
|
|
};
|
|
case '[': {
|
|
|
|
r_token.type=TK_BRACKET_OPEN;
|
|
idx++;
|
|
return OK;
|
|
};
|
|
case ']': {
|
|
|
|
r_token.type=TK_BRACKET_CLOSE;
|
|
idx++;
|
|
return OK;
|
|
};
|
|
case ':': {
|
|
|
|
r_token.type=TK_COLON;
|
|
idx++;
|
|
return OK;
|
|
};
|
|
case ',': {
|
|
|
|
r_token.type=TK_COMMA;
|
|
idx++;
|
|
return OK;
|
|
};
|
|
case '"': {
|
|
|
|
idx++;
|
|
String str;
|
|
while(true) {
|
|
if (p_str[idx]==0) {
|
|
r_err_str="Unterminated String";
|
|
return ERR_PARSE_ERROR;
|
|
} else if (p_str[idx]=='"') {
|
|
idx++;
|
|
break;
|
|
} else if (p_str[idx]=='\\') {
|
|
//escaped characters...
|
|
idx++;
|
|
CharType next = p_str[idx];
|
|
if (next==0) {
|
|
r_err_str="Unterminated String";
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
CharType res=0;
|
|
|
|
switch(next) {
|
|
|
|
case 'b': res=8; break;
|
|
case 't': res=9; break;
|
|
case 'n': res=10; break;
|
|
case 'f': res=12; break;
|
|
case 'r': res=13; break;
|
|
case 'u': {
|
|
//hexnumbarh - oct is deprecated
|
|
|
|
|
|
for(int j=0;j<4;j++) {
|
|
CharType c = p_str[idx+j+1];
|
|
if (c==0) {
|
|
r_err_str="Unterminated String";
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
if (!((c>='0' && c<='9') || (c>='a' && c<='f') || (c>='A' && c<='F'))) {
|
|
|
|
r_err_str="Malformed hex constant in string";
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
CharType v;
|
|
if (c>='0' && c<='9') {
|
|
v=c-'0';
|
|
} else if (c>='a' && c<='f') {
|
|
v=c-'a';
|
|
v+=10;
|
|
} else if (c>='A' && c<='F') {
|
|
v=c-'A';
|
|
v+=10;
|
|
} else {
|
|
ERR_PRINT("BUG");
|
|
v=0;
|
|
}
|
|
|
|
res<<=4;
|
|
res|=v;
|
|
|
|
|
|
}
|
|
idx+=4; //will add at the end anyway
|
|
|
|
|
|
} break;
|
|
//case '\"': res='\"'; break;
|
|
//case '\\': res='\\'; break;
|
|
//case '/': res='/'; break;
|
|
default: {
|
|
res = next;
|
|
//r_err_str="Invalid escape sequence";
|
|
//return ERR_PARSE_ERROR;
|
|
} break;
|
|
}
|
|
|
|
str+=res;
|
|
|
|
} else {
|
|
if (p_str[idx]=='\n')
|
|
line++;
|
|
str+=p_str[idx];
|
|
}
|
|
idx++;
|
|
}
|
|
|
|
r_token.type=TK_STRING;
|
|
r_token.value=str;
|
|
return OK;
|
|
|
|
} break;
|
|
default: {
|
|
|
|
if (p_str[idx]<=32) {
|
|
idx++;
|
|
break;
|
|
}
|
|
|
|
if (p_str[idx]=='-' || (p_str[idx]>='0' && p_str[idx]<='9')) {
|
|
//a number
|
|
const CharType *rptr;
|
|
double number = String::to_double(&p_str[idx],&rptr);
|
|
idx+=(rptr - &p_str[idx]);
|
|
r_token.type=TK_NUMBER;
|
|
r_token.value=number;
|
|
return OK;
|
|
|
|
} else if ((p_str[idx]>='A' && p_str[idx]<='Z') || (p_str[idx]>='a' && p_str[idx]<='z')) {
|
|
|
|
String id;
|
|
|
|
while((p_str[idx]>='A' && p_str[idx]<='Z') || (p_str[idx]>='a' && p_str[idx]<='z')) {
|
|
|
|
id+=p_str[idx];
|
|
idx++;
|
|
}
|
|
|
|
r_token.type=TK_IDENTIFIER;
|
|
r_token.value=id;
|
|
return OK;
|
|
} else {
|
|
r_err_str="Unexpected character.";
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
|
|
|
|
|
|
Error JSON::_parse_value(Variant &value,Token& token,const CharType *p_str,int &index, int p_len,int &line,String &r_err_str) {
|
|
|
|
|
|
if (token.type==TK_CURLY_BRACKET_OPEN) {
|
|
|
|
Dictionary d(true);
|
|
Error err = _parse_object(d,p_str,index,p_len,line,r_err_str);
|
|
if (err)
|
|
return err;
|
|
value=d;
|
|
return OK;
|
|
} else if (token.type==TK_BRACKET_OPEN) {
|
|
|
|
Array a(true);
|
|
Error err = _parse_array(a,p_str,index,p_len,line,r_err_str);
|
|
if (err)
|
|
return err;
|
|
value=a;
|
|
return OK;
|
|
|
|
} else if (token.type==TK_IDENTIFIER) {
|
|
|
|
String id = token.value;
|
|
if (id=="true")
|
|
value=true;
|
|
else if (id=="false")
|
|
value=false;
|
|
else if (id=="null")
|
|
value=Variant();
|
|
else {
|
|
r_err_str="Expected 'true','false' or 'null', got '"+id+"'.";
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
return OK;
|
|
|
|
} else if (token.type==TK_NUMBER) {
|
|
|
|
value=token.value;
|
|
return OK;
|
|
} else if (token.type==TK_STRING) {
|
|
|
|
value=token.value;
|
|
return OK;
|
|
} else {
|
|
r_err_str="Expected value, got "+String(tk_name[token.type])+".";
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
|
|
|
|
Error JSON::_parse_array(Array &array,const CharType *p_str,int &index, int p_len,int &line,String &r_err_str) {
|
|
|
|
Token token;
|
|
bool need_comma=false;
|
|
|
|
|
|
while(index<p_len) {
|
|
|
|
Error err = _get_token(p_str,index,p_len,token,line,r_err_str);
|
|
if (err!=OK)
|
|
return err;
|
|
|
|
if (token.type==TK_BRACKET_CLOSE) {
|
|
|
|
return OK;
|
|
}
|
|
|
|
if (need_comma) {
|
|
|
|
if (token.type!=TK_COMMA) {
|
|
|
|
r_err_str="Expected ','";
|
|
return ERR_PARSE_ERROR;
|
|
} else {
|
|
need_comma=false;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
Variant v;
|
|
err = _parse_value(v,token,p_str,index,p_len,line,r_err_str);
|
|
if (err)
|
|
return err;
|
|
|
|
array.push_back(v);
|
|
need_comma=true;
|
|
|
|
}
|
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
Error JSON::_parse_object(Dictionary &object,const CharType *p_str,int &index, int p_len,int &line,String &r_err_str) {
|
|
|
|
bool at_key=true;
|
|
String key;
|
|
Token token;
|
|
bool need_comma=false;
|
|
|
|
|
|
while(index<p_len) {
|
|
|
|
|
|
if (at_key) {
|
|
|
|
Error err = _get_token(p_str,index,p_len,token,line,r_err_str);
|
|
if (err!=OK)
|
|
return err;
|
|
|
|
if (token.type==TK_CURLY_BRACKET_CLOSE) {
|
|
|
|
return OK;
|
|
}
|
|
|
|
if (need_comma) {
|
|
|
|
if (token.type!=TK_COMMA) {
|
|
|
|
r_err_str="Expected '}' or ','";
|
|
return ERR_PARSE_ERROR;
|
|
} else {
|
|
need_comma=false;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (token.type!=TK_STRING) {
|
|
|
|
|
|
r_err_str="Expected key";
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
|
|
key=token.value;
|
|
err = _get_token(p_str,index,p_len,token,line,r_err_str);
|
|
if (err!=OK)
|
|
return err;
|
|
if (token.type!=TK_COLON) {
|
|
|
|
r_err_str="Expected ':'";
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
at_key=false;
|
|
} else {
|
|
|
|
|
|
Error err = _get_token(p_str,index,p_len,token,line,r_err_str);
|
|
if (err!=OK)
|
|
return err;
|
|
|
|
Variant v;
|
|
err = _parse_value(v,token,p_str,index,p_len,line,r_err_str);
|
|
if (err)
|
|
return err;
|
|
object[key]=v;
|
|
need_comma=true;
|
|
at_key=true;
|
|
}
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
|
|
Error JSON::parse(const String& p_json,Dictionary& r_ret,String &r_err_str,int &r_err_line) {
|
|
|
|
|
|
const CharType *str = p_json.ptr();
|
|
int idx = 0;
|
|
int len = p_json.length();
|
|
Token token;
|
|
int line=0;
|
|
String aux_key;
|
|
|
|
Error err = _get_token(str,idx,len,token,line,r_err_str);
|
|
if (err)
|
|
return err;
|
|
|
|
if (token.type!=TK_CURLY_BRACKET_OPEN) {
|
|
|
|
r_err_str="Expected '{'";
|
|
return ERR_PARSE_ERROR;
|
|
}
|
|
|
|
return _parse_object(r_ret,str,idx,len,r_err_line,r_err_str);
|
|
|
|
}
|
|
|
|
|