Class: JSON::Ext::Parser

Inherits:
Object
  • Object
show all
Defined in:
parser/parser.c,
parser/parser.c

Overview

This is the JSON parser implemented as a C extension. It can be configured to be used by setting

JSON.parser = JSON::Ext::Parser

with the method parser= in JSON.

Instance Method Summary collapse

Constructor Details

#new(source, opts) ⇒ Object

Creates a new JSON::Ext::Parser instance for the string source.

Creates a new JSON::Ext::Parser instance for the string source.

It will be configured by the opts hash. opts can have the following keys:

opts can have the following keys:

  • max_nesting: The maximum depth of nesting allowed in the parsed data structures. Disable depth checking with :max_nesting => false|nil|0, it defaults to 100.

  • allow_nan: If set to true, allow NaN, Infinity and -Infinity in defiance of RFC 4627 to be parsed by the Parser. This option defaults to false.

  • symbolize_names: If set to true, returns symbols for the names (keys) in a JSON object. Otherwise strings are returned, which is also the default. It’s not possible to use this option in conjunction with the create_additions option.

  • create_additions: If set to false, the Parser doesn’t create additions even if a matching class and create_id was found. This option defaults to false.

  • object_class: Defaults to Hash

  • array_class: Defaults to Array



1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
 
# File 'parser/parser.c', line 1775

static VALUE cParser_initialize(int argc, VALUE *argv, VALUE self)
{
    VALUE source, opts;
    GET_PARSER_INIT;

    if (json->Vsource) {
        rb_raise(rb_eTypeError, "already initialized instance");
    }
#ifdef HAVE_RB_SCAN_ARGS_OPTIONAL_HASH
    rb_scan_args(argc, argv, "1:", &source, &opts);
#else
    rb_scan_args(argc, argv, "11", &source, &opts);
#endif
    if (!NIL_P(opts)) {
#ifndef HAVE_RB_SCAN_ARGS_OPTIONAL_HASH
        opts = rb_convert_type(opts, T_HASH, "Hash", "to_hash");
        if (NIL_P(opts)) {
            rb_raise(rb_eArgError, "opts needs to be like a hash");
        } else {
#endif
            VALUE tmp = ID2SYM(i_max_nesting);
            if (option_given_p(opts, tmp)) {
                VALUE max_nesting = rb_hash_aref(opts, tmp);
                if (RTEST(max_nesting)) {
                    Check_Type(max_nesting, T_FIXNUM);
                    json->max_nesting = FIX2INT(max_nesting);
                } else {
                    json->max_nesting = 0;
                }
            } else {
                json->max_nesting = 100;
            }
            tmp = ID2SYM(i_allow_nan);
            if (option_given_p(opts, tmp)) {
                json->allow_nan = RTEST(rb_hash_aref(opts, tmp)) ? 1 : 0;
            } else {
                json->allow_nan = 0;
            }
            tmp = ID2SYM(i_symbolize_names);
            if (option_given_p(opts, tmp)) {
                json->symbolize_names = RTEST(rb_hash_aref(opts, tmp)) ? 1 : 0;
            } else {
                json->symbolize_names = 0;
            }
            tmp = ID2SYM(i_freeze);
            if (option_given_p(opts, tmp)) {
                json->freeze = RTEST(rb_hash_aref(opts, tmp)) ? 1 : 0;
            } else {
                json->freeze = 0;
            }
            tmp = ID2SYM(i_create_additions);
            if (option_given_p(opts, tmp)) {
                json->create_additions = RTEST(rb_hash_aref(opts, tmp));
            } else {
                json->create_additions = 0;
            }
            if (json->symbolize_names && json->create_additions) {
              rb_raise(rb_eArgError,
                "options :symbolize_names and :create_additions cannot be "
                " used in conjunction");
            }
            tmp = ID2SYM(i_create_id);
            if (option_given_p(opts, tmp)) {
                json->create_id = rb_hash_aref(opts, tmp);
            } else {
                json->create_id = rb_funcall(mJSON, i_create_id, 0);
            }
            tmp = ID2SYM(i_object_class);
            if (option_given_p(opts, tmp)) {
                json->object_class = rb_hash_aref(opts, tmp);
            } else {
                json->object_class = Qnil;
            }
            tmp = ID2SYM(i_array_class);
            if (option_given_p(opts, tmp)) {
                json->array_class = rb_hash_aref(opts, tmp);
            } else {
                json->array_class = Qnil;
            }
            tmp = ID2SYM(i_decimal_class);
            if (option_given_p(opts, tmp)) {
                json->decimal_class = rb_hash_aref(opts, tmp);
            } else {
                json->decimal_class = Qnil;
            }
            tmp = ID2SYM(i_match_string);
            if (option_given_p(opts, tmp)) {
                VALUE match_string = rb_hash_aref(opts, tmp);
                json->match_string = RTEST(match_string) ? match_string : Qnil;
            } else {
                json->match_string = Qnil;
            }
#ifndef HAVE_RB_SCAN_ARGS_OPTIONAL_HASH
        }
#endif
    } else {
        json->max_nesting = 100;
        json->allow_nan = 0;
        json->create_additions = 0;
        json->create_id = rb_funcall(mJSON, i_create_id, 0);
        json->object_class = Qnil;
        json->array_class = Qnil;
        json->decimal_class = Qnil;
    }
    source = convert_encoding(StringValue(source));
    StringValue(source);
    json->len = RSTRING_LEN(source);
    json->source = RSTRING_PTR(source);;
    json->Vsource = source;
    return self;
}

Instance Method Details

#parse ⇒ Object

Parses the current JSON text source and returns the complete data

structure as a result.



1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
 
# File 'parser/parser.c', line 1905

static VALUE cParser_parse(VALUE self)
{
  char *p, *pe;
  int cs = EVIL;
  VALUE result = Qnil;
  GET_PARSER;


#line 1903 "parser.c"
	{
	cs = JSON_start;
	}

#line 802 "parser.rl"
  p = json->source;
  pe = p + json->len;

#line 1912 "parser.c"
	{
	if ( p == pe )
		goto _test_eof;
	switch ( cs )
	{
st1:
	if ( ++p == pe )
		goto _test_eof1;
case 1:
	switch( (*p) ) {
		case 13: goto st1;
		case 32: goto st1;
		case 34: goto tr2;
		case 45: goto tr2;
		case 47: goto st6;
		case 73: goto tr2;
		case 78: goto tr2;
		case 91: goto tr2;
		case 102: goto tr2;
		case 110: goto tr2;
		case 116: goto tr2;
		case 123: goto tr2;
	}
	if ( (*p) > 10 ) {
		if ( 48 <= (*p) && (*p) <= 57 )
			goto tr2;
	} else if ( (*p) >= 9 )
		goto st1;
	goto st0;
st0:
cs = 0;
	goto _out;
tr2:
#line 778 "parser.rl"
	{
        char *np = JSON_parse_value(json, p, pe, &result, 0);
        if (np == NULL) { p--; {p++; cs = 10; goto _out;} } else {p = (( np))-1;}
    }
	goto st10;
st10:
	if ( ++p == pe )
		goto _test_eof10;
case 10:
#line 1956 "parser.c"
	switch( (*p) ) {
		case 13: goto st10;
		case 32: goto st10;
		case 47: goto st2;
	}
	if ( 9 <= (*p) && (*p) <= 10 )
		goto st10;
	goto st0;
st2:
	if ( ++p == pe )
		goto _test_eof2;
case 2:
	switch( (*p) ) {
		case 42: goto st3;
		case 47: goto st5;
	}
	goto st0;
st3:
	if ( ++p == pe )
		goto _test_eof3;
case 3:
	if ( (*p) == 42 )
		goto st4;
	goto st3;
st4:
	if ( ++p == pe )
		goto _test_eof4;
case 4:
	switch( (*p) ) {
		case 42: goto st4;
		case 47: goto st10;
	}
	goto st3;
st5:
	if ( ++p == pe )
		goto _test_eof5;
case 5:
	if ( (*p) == 10 )
		goto st10;
	goto st5;
st6:
	if ( ++p == pe )
		goto _test_eof6;
case 6:
	switch( (*p) ) {
		case 42: goto st7;
		case 47: goto st9;
	}
	goto st0;
st7:
	if ( ++p == pe )
		goto _test_eof7;
case 7:
	if ( (*p) == 42 )
		goto st8;
	goto st7;
st8:
	if ( ++p == pe )
		goto _test_eof8;
case 8:
	switch( (*p) ) {
		case 42: goto st8;
		case 47: goto st1;
	}
	goto st7;
st9:
	if ( ++p == pe )
		goto _test_eof9;
case 9:
	if ( (*p) == 10 )
		goto st1;
	goto st9;
	}
	_test_eof1: cs = 1; goto _test_eof;
	_test_eof10: cs = 10; goto _test_eof;
	_test_eof2: cs = 2; goto _test_eof;
	_test_eof3: cs = 3; goto _test_eof;
	_test_eof4: cs = 4; goto _test_eof;
	_test_eof5: cs = 5; goto _test_eof;
	_test_eof6: cs = 6; goto _test_eof;
	_test_eof7: cs = 7; goto _test_eof;
	_test_eof8: cs = 8; goto _test_eof;
	_test_eof9: cs = 9; goto _test_eof;

	_test_eof: {}
	_out: {}
	}

#line 805 "parser.rl"

  if (cs >= JSON_first_final && p == pe) {
    return result;
  } else {
    rb_enc_raise(EXC_ENCODING eParserError, "%u: unexpected token at '%s'", __LINE__, p);
    return Qnil;
  }
}

#source ⇒ Object

Returns a copy of the current source string, that was used to construct this Parser.



2114
2115
2116
2117
2118
 
# File 'parser/parser.c', line 2114

static VALUE cParser_source(VALUE self)
{
    GET_PARSER;
    return rb_str_dup(json->Vsource);
}