Class: JSON::Ext::Parser

Inherits:
Object
  • Object
show all
Defined in:
ext/json/ext/parser/parser.c,
ext/json/ext/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 19.

  • 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.

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

  • object_class: Defaults to Hash

  • array_class: Defaults to Array



1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
# File 'ext/json/ext/parser/parser.c', line 1644

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

    if (RTEST(json->Vsource)) {
        rb_raise(rb_eTypeError, "already initialized instance");
    }
    rb_scan_args(argc, argv, "11", &source, &opts);
    if (!NIL_P(opts)) {
        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 {
            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 = 19;
            }
            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_quirks_mode);
            if (option_given_p(opts, tmp)) {
                VALUE quirks_mode = rb_hash_aref(opts, tmp);
                json->quirks_mode = RTEST(quirks_mode) ? 1 : 0;
            } else {
                json->quirks_mode = 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 = 1;
            }
            tmp = ID2SYM(i_create_id);
            if (option_given_p(opts, tmp)) {
                PARSER_SET_REFERENCE(json, create_id, rb_hash_aref(opts, tmp));
            } else {
                PARSER_SET_REFERENCE(json, create_id, rb_funcall(mJSON, i_create_id, 0));
            }
            tmp = ID2SYM(i_object_class);
            if (option_given_p(opts, tmp)) {
                PARSER_SET_REFERENCE(json, object_class, rb_hash_aref(opts, tmp));
            } else {
                PARSER_SET_REFERENCE(json, object_class, Qnil);
            }
            tmp = ID2SYM(i_array_class);
            if (option_given_p(opts, tmp)) {
                PARSER_SET_REFERENCE(json, array_class, rb_hash_aref(opts, tmp));
            } else {
                PARSER_SET_REFERENCE(json, array_class, Qnil);
            }
            tmp = ID2SYM(i_match_string);
            if (option_given_p(opts, tmp)) {
                VALUE match_string = rb_hash_aref(opts, tmp);
                PARSER_SET_REFERENCE(json, match_string, RTEST(match_string) ? match_string : Qnil);
            } else {
                PARSER_SET_REFERENCE(json, match_string, Qnil);
            }
        }
    } else {
        json->max_nesting = 19;
        json->allow_nan = 0;
        json->create_additions = 1;
        PARSER_SET_REFERENCE(json, create_id, rb_funcall(mJSON, i_create_id, 0));
        json->object_class = Qnil;
        json->array_class = Qnil;
    }
    source = rb_convert_type(source, T_STRING, "String", "to_str");
    if (!json->quirks_mode) {
      source = convert_encoding(StringValue(source));
    }
    json->current_nesting = 0;
    StringValue(source);
    json->len = RSTRING_LEN(source);
    json->source = RSTRING_PTR(source);;
    PARSER_SET_REFERENCE(json, Vsource, source);
    return self;
}

Instance Method Details

#parseObject

Parses the current JSON text source and returns the complete data

structure as a result.


2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
# File 'ext/json/ext/parser/parser.c', line 2093

static VALUE cParser_parse(VALUE self)
{
  GET_PARSER;

  if (json->quirks_mode) {
    return cParser_parse_quirks_mode(self);
  } else {
    return cParser_parse_strict(self);
  }
}

#quirks_mode?Boolean

Returns a true, if this parser is in quirks_mode, false otherwise.

Returns:

  • (Boolean)


2157
2158
2159
2160
2161
# File 'ext/json/ext/parser/parser.c', line 2157

static VALUE cParser_quirks_mode_p(VALUE self)
{
    GET_PARSER;
    return json->quirks_mode ? Qtrue : Qfalse;
}

#sourceObject

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



2146
2147
2148
2149
2150
# File 'ext/json/ext/parser/parser.c', line 2146

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