Class: JSON::Ext::Parser

Inherits:

Object

• Object
• JSON::Ext::Parser

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

• #new(source, opts) ⇒ Object constructor

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

• #parse ⇒ Object

  Parses the current JSON text source and returns the complete data structure as a result.

• #quirks_mode? ⇒ Boolean

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

• #source ⇒ Object

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

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.

• 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

# File 'ext/json/ext/parser/parser.c', line 1654

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_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 = 0;
            }
            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_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 = 1;
        json->create_id = rb_funcall(mJSON, i_create_id, 0);
        json->object_class = Qnil;
        json->array_class = Qnil;
    }
    StringValue(source);
    if (!json->quirks_mode) {
	source = convert_encoding(source);
    }
    json->current_nesting = 0;
    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.

# File 'ext/json/ext/parser/parser.c', line 2110

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)

# File 'ext/json/ext/parser/parser.c', line 2180

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

#source ⇒ Object

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

# File 'ext/json/ext/parser/parser.c', line 2169

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