json.qc File Reference

#include "json.qh"
#include "test.qh"

Include dependency graph for json.qc:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Macros
#define	JSON_BEGIN()
#define	JSON_END()
#define	JSON_FAIL(reason)

Functions
ERASEABLE bool	_json_parse_array ()
ERASEABLE bool	_json_parse_false ()
ERASEABLE bool	_json_parse_float ()
ERASEABLE bool	_json_parse_int ()
ERASEABLE bool	_json_parse_members ()
ERASEABLE bool	_json_parse_null ()
ERASEABLE bool	_json_parse_number ()
ERASEABLE bool	_json_parse_object ()
	Parse a json object.
ERASEABLE bool	_json_parse_pair ()
ERASEABLE bool	_json_parse_string (bool add)
ERASEABLE bool	_json_parse_true ()
ERASEABLE bool	_json_parse_value ()
ERASEABLE void	json_del (int buf)
ERASEABLE void	json_dump (int buf)
ERASEABLE string	json_get (int buf, string key)
ERASEABLE int	json_parse (string in, bool() func)
	STRING_ITERATOR (_json, string_null, 0)
	TEST (json, Parse)

Variables
int	_json_buffer
	Store interleaved keys/values in a string buffer.
int	_json_keys
	Current keys.
string	_json_ns
	Current namespace.
string	_json_temp
	Last read string.

Macro Definition Documentation

JSON_BEGIN

#define JSON_BEGIN

(

)

Value:

int __i = STRING_ITERATOR_SAVE(_json)

Definition at line 12 of file json.qc.

Referenced by _json_parse_array(), _json_parse_false(), _json_parse_float(), _json_parse_int(), _json_parse_members(), _json_parse_null(), _json_parse_number(), _json_parse_object(), _json_parse_pair(), _json_parse_string(), _json_parse_true(), and _json_parse_value().

JSON_END

#define JSON_END

(

)

Value:

    return true; \
LABEL(fail) \
    STRING_ITERATOR_LOAD(_json, __i); \
    return false;

Definition at line 14 of file json.qc.

#define JSON_END() \
    return true; \
LABEL(fail) \
    STRING_ITERATOR_LOAD(_json, __i); \
    return false;

Referenced by _json_parse_array(), _json_parse_false(), _json_parse_float(), _json_parse_int(), _json_parse_members(), _json_parse_null(), _json_parse_number(), _json_parse_object(), _json_parse_pair(), _json_parse_string(), _json_parse_true(), and _json_parse_value().

JSON_FAIL

#define JSON_FAIL

(

reason

)

Value:

goto fail

Definition at line 13 of file json.qc.

Referenced by _json_parse_array(), _json_parse_false(), _json_parse_float(), _json_parse_int(), _json_parse_members(), _json_parse_null(), _json_parse_number(), _json_parse_object(), _json_parse_pair(), _json_parse_string(), _json_parse_true(), and _json_parse_value().

Function Documentation

_json_parse_array()

ERASEABLE bool _json_parse_array

(

)

Definition at line 71 of file json.qc.

{
    JSON_BEGIN();
    if (STRING_ITERATOR_GET(_json) != '[')
        JSON_FAIL("expected '['");
    int len = bufstr_add(_json_buffer, "0", 0);
    if (len)
        bufstr_set(_json_buffer, len - 1, strcat(bufstr_get(_json_buffer, len - 1), ".length"));
    bool required = false;
    for (int n = 0; ; ++n)
    {
        string key = ftos(n);
        if (_json_ns)
            key = strcat(_json_ns, ".", key);
        int it = bufstr_add(_json_buffer, key, 0);
        bool ret = false;
        WITH(string, _json_ns, key, ret = _json_parse_value());
        if (!ret)
        {
            bufstr_free(_json_buffer, it);
            if (required)
                JSON_FAIL("expected value");
            else
                break;
        }
        bufstr_set(_json_buffer, len, ftos(n + 1));
        if (STRING_ITERATOR_PEEK(_json) == ',')
        {
            STRING_ITERATOR_NEXT(_json);
            required = true;
            continue;
        }
        break;
    }
    if (STRING_ITERATOR_GET(_json) != ']')
        JSON_FAIL("expected ']'");
    JSON_END();
}

References _json_buffer, _json_ns, _json_parse_value(), ftos(), JSON_BEGIN, JSON_END, JSON_FAIL, strcat(), STRING_ITERATOR_GET, STRING_ITERATOR_NEXT, STRING_ITERATOR_PEEK, and WITH.

Referenced by _json_parse_value(), and PlayerStats_PlayerBasic_Handler().

_json_parse_false()

ERASEABLE bool _json_parse_false

(

)

Definition at line 139 of file json.qc.

    {
        JSON_BEGIN();
        if (!(STRING_ITERATOR_GET(_json) == 'f'
        &&    STRING_ITERATOR_GET(_json) == 'a'
        &&    STRING_ITERATOR_GET(_json) == 'l'
        &&    STRING_ITERATOR_GET(_json) == 's'
        &&    STRING_ITERATOR_GET(_json) == 'e'))
            JSON_FAIL("expected 'false'");
        bufstr_add(_json_buffer, "0", 0);
        JSON_END();
    }

References _json_buffer, JSON_BEGIN, JSON_END, JSON_FAIL, and STRING_ITERATOR_GET.

Referenced by _json_parse_value().

_json_parse_float()

ERASEABLE bool _json_parse_float

(

)

Definition at line 216 of file json.qc.

    {
        JSON_BEGIN();
        string s = "";
        bool needdot = true;
        for (int c; (c = STRING_ITERATOR_GET(_json)); )
        {
            if (c < '0' || c > '9')
            {
                if (c == '.' && needdot) // fine
                    needdot = false;
                else
                {
                    STRING_ITERATOR_UNGET(_json);
                    break;
                }
            }
            s = strcat(s, chr2str(c));
        }
        if (s == "")
            JSON_FAIL("expected float");
        bufstr_add(_json_buffer, s, 0);
        JSON_END();
    }

References _json_buffer, chr2str, JSON_BEGIN, JSON_END, JSON_FAIL, strcat(), STRING_ITERATOR_GET, and STRING_ITERATOR_UNGET.

Referenced by _json_parse_number().

_json_parse_int()

ERASEABLE bool _json_parse_int

(

)

Definition at line 242 of file json.qc.

    {
        JSON_BEGIN();
        string s = "";
        for (int c; (c = STRING_ITERATOR_GET(_json)); )
        {
            if (c < '0' || c > '9')
            {
                STRING_ITERATOR_UNGET(_json);
                break;
            }
            if (s == "" && c == '0')
                JSON_FAIL("expected [1-9]");
            s = strcat(s, chr2str(c));
        }
        if (s == "")
            JSON_FAIL("expected int");
        if (ftos(stof(s)) != s)
            JSON_FAIL("expected int");
        bufstr_add(_json_buffer, s, 0);
        JSON_END();
    }

References _json_buffer, chr2str, ftos(), JSON_BEGIN, JSON_END, JSON_FAIL, stof(), strcat(), STRING_ITERATOR_GET, and STRING_ITERATOR_UNGET.

Referenced by _json_parse_number().

_json_parse_members()

ERASEABLE bool _json_parse_members

(

)

Definition at line 33 of file json.qc.

    {
        JSON_BEGIN();
        for (;;)
        {
            if (!_json_parse_pair())
                JSON_FAIL("expected pair");
            if (STRING_ITERATOR_PEEK(_json) == ',')
            {
                STRING_ITERATOR_NEXT(_json);
                continue;
            }
            break;
        }
        JSON_END();
    }

References _json_parse_pair(), JSON_BEGIN, JSON_END, JSON_FAIL, STRING_ITERATOR_NEXT, and STRING_ITERATOR_PEEK.

Referenced by _json_parse_object().

_json_parse_null()

ERASEABLE bool _json_parse_null

(

)

Definition at line 153 of file json.qc.

    {
        JSON_BEGIN();
        if (!(STRING_ITERATOR_GET(_json) == 'n'
        &&    STRING_ITERATOR_GET(_json) == 'u'
        &&    STRING_ITERATOR_GET(_json) == 'l'
        &&    STRING_ITERATOR_GET(_json) == 'l'))
            JSON_FAIL("expected 'null'");
        bufstr_add(_json_buffer, "", 0);
        JSON_END();
    }

References _json_buffer, JSON_BEGIN, JSON_END, JSON_FAIL, and STRING_ITERATOR_GET.

Referenced by _json_parse_value().

_json_parse_number()

ERASEABLE bool _json_parse_number

(

)

Definition at line 207 of file json.qc.

{
    JSON_BEGIN();
    if (!(_json_parse_float() || _json_parse_int()))
        JSON_FAIL("expected number");
    JSON_END();
}

References _json_parse_float(), _json_parse_int(), JSON_BEGIN, JSON_END, and JSON_FAIL.

Referenced by _json_parse_value().

_json_parse_object()

ERASEABLE bool _json_parse_object

(

)

Parse a json object.

Definition at line 21 of file json.qc.

{
    JSON_BEGIN();
    if (STRING_ITERATOR_GET(_json) != '{')
        JSON_FAIL("expected '{'");
    WITH(int, _json_keys, bufstr_add(_json_buffer, "", 0), _json_parse_members());
    if (STRING_ITERATOR_GET(_json) != '}')
        JSON_FAIL("expected '}'");
    JSON_END();
}

References _json_buffer, _json_keys, _json_parse_members(), JSON_BEGIN, JSON_END, JSON_FAIL, STRING_ITERATOR_GET, and WITH.

Referenced by _json_parse_value(), MX_Messages_(), MX_Sync_(), and TEST().

_json_parse_pair()

ERASEABLE bool _json_parse_pair

(

)

Definition at line 51 of file json.qc.

        {
            JSON_BEGIN();
            if (!_json_parse_string(false))
                JSON_FAIL("expected string");
            string key = _json_temp;
            bufstr_set(_json_buffer, _json_keys, cons(bufstr_get(_json_buffer, _json_keys), key));
            if (_json_ns)
                key = strcat(_json_ns, ".", key);
            bufstr_add(_json_buffer, key, 0);
            if (STRING_ITERATOR_GET(_json) != ':')
                JSON_FAIL("expected ':'");
            bool ret = false;
            WITH(string, _json_ns, key, ret = _json_parse_value());
            if (!ret)
                JSON_FAIL("expected value");
            JSON_END();
        }

References _json_buffer, _json_keys, _json_ns, _json_parse_string(), _json_parse_value(), _json_temp, cons(), JSON_BEGIN, JSON_END, JSON_FAIL, strcat(), STRING_ITERATOR_GET, and WITH.

Referenced by _json_parse_members().

_json_parse_string()

ERASEABLE bool _json_parse_string

(

bool

add

)

Definition at line 166 of file json.qc.

{
    JSON_BEGIN();
    if (STRING_ITERATOR_GET(_json) != '"')
        JSON_FAIL("expected opening '\"'");
    string s = "";
    for (int c; (c = STRING_ITERATOR_GET(_json)); )
    {
        if (c == '"')
        {
            STRING_ITERATOR_UNGET(_json);
            break;
        }
        else if (c == '\\')
        {
            string esc;
            switch (STRING_ITERATOR_GET(_json))
            {
                default:
                    JSON_FAIL("expected ( '\"' | '\\' | 'n' | 't' )");
                case '"':  esc = "\"";  break;
                case '\\': esc = "\\";  break;
                case 'n':  esc = "\n";  break;
                case 't':  esc = "\t";  break;
                case 'u':  esc = "\\u"; break; // TODO
                case '/':  esc = "/";   break;
            }
            s = strcat(s, esc);
        }
        else
            s = strcat(s, chr2str(c));
    }
    if (STRING_ITERATOR_GET(_json) != '"')
        JSON_FAIL("expected closing '\"'");
    if (add)
        bufstr_add(_json_buffer, s, 0);
    _json_temp = s;
    JSON_END();
}

References _json_buffer, _json_temp, chr2str, JSON_BEGIN, JSON_END, JSON_FAIL, strcat(), STRING_ITERATOR_GET, and STRING_ITERATOR_UNGET.

Referenced by _json_parse_pair(), and _json_parse_value().

_json_parse_true()

ERASEABLE bool _json_parse_true

(

)

Definition at line 126 of file json.qc.

    {
        JSON_BEGIN();
        if (!(STRING_ITERATOR_GET(_json) == 't'
        &&    STRING_ITERATOR_GET(_json) == 'r'
        &&    STRING_ITERATOR_GET(_json) == 'u'
        &&    STRING_ITERATOR_GET(_json) == 'e'))
            JSON_FAIL("expected 'true'");
        bufstr_add(_json_buffer, "1", 0);
        JSON_END();
    }

References _json_buffer, JSON_BEGIN, JSON_END, JSON_FAIL, and STRING_ITERATOR_GET.

Referenced by _json_parse_value().

_json_parse_value()

ERASEABLE bool _json_parse_value

(

)

Definition at line 111 of file json.qc.

{
    JSON_BEGIN();
    if (!(_json_parse_string(true)
    ||    _json_parse_number()
    ||    _json_parse_object()
    ||    _json_parse_array()
    ||    _json_parse_true()
    ||    _json_parse_false()
    ||    _json_parse_null()))
        JSON_FAIL("expected value");
    JSON_END();
}

References _json_parse_array(), _json_parse_false(), _json_parse_null(), _json_parse_number(), _json_parse_object(), _json_parse_string(), _json_parse_true(), JSON_BEGIN, JSON_END, and JSON_FAIL.

Referenced by _json_parse_array(), and _json_parse_pair().

json_del()

ERASEABLE void json_del

(

int

buf

)

Definition at line 332 of file json.qc.

{
    buf_del(buf);
}

json_dump()

ERASEABLE void json_dump

(

int

buf

)

Definition at line 338 of file json.qc.

{
    for (int i = 0, n = buf_getsize(buf); i < n; ++i)
        print(bufstr_get(buf, i), "\n");
}

References print().

Referenced by TEST().

json_get()

ERASEABLE string json_get	(	int	buf,
		string	key )

Definition at line 323 of file json.qc.

{
    for (int i = 1, n = buf_getsize(buf); i < n; i += 2)
        if (bufstr_get(buf, i) == key)
            return bufstr_get(buf, i + 1);
    return string_null;
}

References string_null.

Referenced by MX_Handle(), MX_Messages_(), MX_Sync_(), and PlayerStats_PlayerBasic_Handler().

json_parse()

ERASEABLE int json_parse	(	string	in,
		bool()	func )

Definition at line 266 of file json.qc.

{
    string trimmed = "";
    LABEL(trim)
    {
        int o = strstrofs(in, "\"", 0);
        if (o >= 0)
        {
            string part = substring(in, 0, o + 1);
            in = substring(in, o + 1, -1);
            part = strreplace(" ", "", part);
            part = strreplace("\n", "", part);
            trimmed = strcat(trimmed, part);
            goto trim_str;
        }
        else
        {
            string part = in;
            part = strreplace(" ", "", part);
            part = strreplace("\n", "", part);
            trimmed = strcat(trimmed, part);
            goto done;
        }
    }
    LABEL(trim_str)
    {
        int o = strstrofs(in, "\"", 0);
        int esc = strstrofs(in, "\\\"", 0);
        if (o < esc || esc < 0) // simple string
        {
            string part = substring(in, 0, o + 1);
            in = substring(in, o + 1, -1);
            trimmed = strcat(trimmed, part);
            goto trim;
        }
        else // has escape
        {
            string part = substring(in, 0, esc + 2);
            in = substring(in, esc + 2, -1);
            trimmed = strcat(trimmed, part);
            goto trim_str;
        }
    }
    LABEL(done);
 
    STRING_ITERATOR_SET(_json, trimmed, 0);
    _json_buffer = buf_create();
    bool ret = func();
    if (!ret)
    {
        buf_del(_json_buffer);
        _json_buffer = -1;
    }
    return _json_buffer;
}

References _json_buffer, buf_create, LABEL, strcat(), STRING_ITERATOR_SET, strstrofs, and substring().

Referenced by MX_Messages_(), MX_Sync_(), PlayerStats_PlayerBasic_Handler(), and TEST().

STRING_ITERATOR()

STRING_ITERATOR	(	_json	,
		string_null	,
		0	)

References string_null.

TEST()

TEST	(	json	,
		Parse	)

Definition at line 348 of file json.qc.

{
    string s = "{\n"
    "    \"m_string\": \"\\\"string\\\"\",\n"
    "    \"m_int\": 123,\n"
    "    \"m_bool\": true,\n"
    "    \"m_null\": null,\n"
    "    \"m_obj\": { },\n"
    "    \"m_arr\": [ ]\n"
    "}";
    print(s, "\n");
    int buf = json_parse(s, _json_parse_object);
    EXPECT_NE(-1, buf);
    json_dump(buf);
    SUCCEED();
}

References _json_parse_object(), EXPECT_NE, json_dump(), json_parse(), print(), and SUCCEED.

Variable Documentation

_json_buffer

int _json_buffer

Store interleaved keys/values in a string buffer.

Definition at line 7 of file json.qc.

Referenced by _json_parse_array(), _json_parse_false(), _json_parse_float(), _json_parse_int(), _json_parse_null(), _json_parse_object(), _json_parse_pair(), _json_parse_string(), _json_parse_true(), and json_parse().

_json_keys

int _json_keys

Current keys.

Definition at line 10 of file json.qc.

Referenced by _json_parse_object(), and _json_parse_pair().

_json_ns

string _json_ns

Current namespace.

Definition at line 9 of file json.qc.

Referenced by _json_parse_array(), and _json_parse_pair().

_json_temp

string _json_temp

Last read string.

Definition at line 8 of file json.qc.

Referenced by _json_parse_pair(), and _json_parse_string().