/* ![[previous]](../icons/n_left.png)
![[next]](../icons/n_right.png)
![[first]](../icons/first.png)
![[last]](../icons/last.png)
![[top]](../icons/n_top.png)
![[bottom]](../icons/bottom.png)
![[index]](../icons/index.png)
![[help]](../icons/help.png)
*/
DEFINITIONS
This source file includes following definitions.
- JSON_Generator_State
- hash_to_json_state_i
- mHash_json_transfrom
- hash_to_json_i
- mHash_to_json
- mArray_json_transfrom
- mArray_to_json
- mInteger_to_json
- mFloat_to_json
- mString_included_s
- mString_to_json
- mString_to_json_raw_object
- mString_to_json_raw
- mString_Extend_json_create
- mTrueClass_to_json
- mFalseClass_to_json
- mNilClass_to_json
- mObject_to_json
- State_mark
- State_allocate
- cState_s_allocate
- cState_configure
- cState_to_h
- cState_initialize
- cState_from_state_s
- cState_indent
- cState_indent_set
- cState_space
- cState_space_set
- cState_space_before
- cState_space_before_set
- cState_object_nl
- cState_object_nl_set
- cState_array_nl
- cState_array_nl_set
- cState_check_circular_p
- cState_max_nesting
- cState_max_nesting_set
- cState_allow_nan_p
- cState_seen_p
- cState_remember
- cState_forget
- Init_generator
#include <string.h>
#include "ruby.h"
#include "unicode.h"
#include <math.h>
#define check_max_nesting(state, depth) do { \
long current_nesting = 1 + depth; \
if (state->max_nesting != 0 && current_nesting > state->max_nesting) \
rb_raise(eNestingError, "nesting of %ld is too deep", current_nesting); \
} while (0);
static VALUE mJSON, mExt, mGenerator, cState, mGeneratorMethods, mObject,
mHash, mArray, mInteger, mFloat, mString, mString_Extend,
mTrueClass, mFalseClass, mNilClass, eGeneratorError,
eCircularDatastructure, eNestingError;
static ID i_to_s, i_to_json, i_new, i_indent, i_space, i_space_before,
i_object_nl, i_array_nl, i_check_circular, i_max_nesting,
i_allow_nan, i_pack, i_unpack, i_create_id, i_extend;
typedef struct JSON_Generator_StateStruct {
VALUE indent;
VALUE space;
VALUE space_before;
VALUE object_nl;
VALUE array_nl;
int check_circular;
VALUE seen;
VALUE memo;
VALUE depth;
long max_nesting;
int flag;
int allow_nan;
} JSON_Generator_State;
#define GET_STATE(self) \
JSON_Generator_State *state; \
Data_Get_Struct(self, JSON_Generator_State, state);
/*
* Document-module: JSON::Ext::Generator
*
* This is the JSON generator implemented as a C extension. It can be
* configured to be used by setting
*
* JSON.generator = JSON::Ext::Generator
*
* with the method generator= in JSON.
*
*/
static int hash_to_json_state_i(VALUE key, VALUE value, VALUE Vstate)
{
VALUE json, buf, Vdepth;
GET_STATE(Vstate);
buf = state->memo;
Vdepth = state->depth;
if (key == Qundef) return ST_CONTINUE;
if (state->flag) {
state->flag = 0;
rb_str_buf_cat2(buf, ",");
if (RSTRING_LEN(state->object_nl)) rb_str_buf_append(buf, state->object_nl);
}
if (RSTRING_LEN(state->object_nl)) {
rb_str_buf_append(buf, rb_str_times(state->indent, Vdepth));
}
json = rb_funcall(rb_funcall(key, i_to_s, 0), i_to_json, 2, Vstate, Vdepth);
Check_Type(json, T_STRING);
rb_str_buf_append(buf, json);
OBJ_INFECT(buf, json);
if (RSTRING_LEN(state->space_before)) {
rb_str_buf_append(buf, state->space_before);
}
rb_str_buf_cat2(buf, ":");
if (RSTRING_LEN(state->space)) rb_str_buf_append(buf, state->space);
json = rb_funcall(value, i_to_json, 2, Vstate, Vdepth);
Check_Type(json, T_STRING);
state->flag = 1;
rb_str_buf_append(buf, json);
OBJ_INFECT(buf, json);
state->depth = Vdepth;
state->memo = buf;
return ST_CONTINUE;
}
inline static VALUE mHash_json_transfrom(VALUE self, VALUE Vstate, VALUE Vdepth) {
long depth, len = RHASH_SIZE(self);
VALUE result;
GET_STATE(Vstate);
depth = 1 + FIX2LONG(Vdepth);
result = rb_str_buf_new(len);
state->memo = result;
state->depth = LONG2FIX(depth);
state->flag = 0;
rb_str_buf_cat2(result, "{");
if (RSTRING_LEN(state->object_nl)) rb_str_buf_append(result, state->object_nl);
rb_hash_foreach(self, hash_to_json_state_i, Vstate);
if (RSTRING_LEN(state->object_nl)) rb_str_buf_append(result, state->object_nl);
if (RSTRING_LEN(state->object_nl)) {
rb_str_buf_append(result, rb_str_times(state->indent, Vdepth));
}
rb_str_buf_cat2(result, "}");
return result;
}
static int hash_to_json_i(VALUE key, VALUE value, VALUE buf)
{
VALUE tmp;
if (key == Qundef) return ST_CONTINUE;
if (RSTRING_LEN(buf) > 1) rb_str_buf_cat2(buf, ",");
tmp = rb_funcall(rb_funcall(key, i_to_s, 0), i_to_json, 0);
Check_Type(tmp, T_STRING);
rb_str_buf_append(buf, tmp);
OBJ_INFECT(buf, tmp);
rb_str_buf_cat2(buf, ":");
tmp = rb_funcall(value, i_to_json, 0);
Check_Type(tmp, T_STRING);
rb_str_buf_append(buf, tmp);
OBJ_INFECT(buf, tmp);
return ST_CONTINUE;
}
/*
* call-seq: to_json(state = nil, depth = 0)
*
* Returns a JSON string containing a JSON object, that is unparsed from
* this Hash instance.
* _state_ is a JSON::State object, that can also be used to configure the
* produced JSON string output further.
* _depth_ is used to find out nesting depth, to indent accordingly.
*/
static VALUE mHash_to_json(int argc, VALUE *argv, VALUE self)
{
VALUE Vstate, Vdepth, result;
long depth;
rb_scan_args(argc, argv, "02", &Vstate, &Vdepth);
depth = NIL_P(Vdepth) ? 0 : FIX2LONG(Vdepth);
if (NIL_P(Vstate)) {
long len = RHASH_SIZE(self);
result = rb_str_buf_new(len);
rb_str_buf_cat2(result, "{");
rb_hash_foreach(self, hash_to_json_i, result);
rb_str_buf_cat2(result, "}");
} else {
GET_STATE(Vstate);
check_max_nesting(state, depth);
if (state->check_circular) {
VALUE self_id = rb_obj_id(self);
if (RTEST(rb_hash_aref(state->seen, self_id))) {
rb_raise(eCircularDatastructure,
"circular data structures not supported!");
}
rb_hash_aset(state->seen, self_id, Qtrue);
result = mHash_json_transfrom(self, Vstate, LONG2FIX(depth));
rb_hash_delete(state->seen, self_id);
} else {
result = mHash_json_transfrom(self, Vstate, LONG2FIX(depth));
}
}
OBJ_INFECT(result, self);
return result;
}
inline static VALUE mArray_json_transfrom(VALUE self, VALUE Vstate, VALUE Vdepth) {
long i, len = RARRAY_LEN(self);
VALUE shift, result;
long depth = NIL_P(Vdepth) ? 0 : FIX2LONG(Vdepth);
VALUE delim = rb_str_new2(",");
GET_STATE(Vstate);
check_max_nesting(state, depth);
if (state->check_circular) {
VALUE self_id = rb_obj_id(self);
rb_hash_aset(state->seen, self_id, Qtrue);
result = rb_str_buf_new(len);
if (RSTRING_LEN(state->array_nl)) rb_str_append(delim, state->array_nl);
shift = rb_str_times(state->indent, LONG2FIX(depth + 1));
rb_str_buf_cat2(result, "[");
OBJ_INFECT(result, self);
rb_str_buf_append(result, state->array_nl);
for (i = 0; i < len; i++) {
VALUE element = RARRAY_PTR(self)[i];
if (RTEST(rb_hash_aref(state->seen, rb_obj_id(element)))) {
rb_raise(eCircularDatastructure,
"circular data structures not supported!");
}
OBJ_INFECT(result, element);
if (i > 0) rb_str_buf_append(result, delim);
rb_str_buf_append(result, shift);
element = rb_funcall(element, i_to_json, 2, Vstate, LONG2FIX(depth + 1));
Check_Type(element, T_STRING);
rb_str_buf_append(result, element);
}
if (RSTRING_LEN(state->array_nl)) {
rb_str_buf_append(result, state->array_nl);
rb_str_buf_append(result, rb_str_times(state->indent, LONG2FIX(depth)));
}
rb_str_buf_cat2(result, "]");
rb_hash_delete(state->seen, self_id);
} else {
result = rb_str_buf_new(len);
OBJ_INFECT(result, self);
if (RSTRING_LEN(state->array_nl)) rb_str_append(delim, state->array_nl);
shift = rb_str_times(state->indent, LONG2FIX(depth + 1));
rb_str_buf_cat2(result, "[");
rb_str_buf_append(result, state->array_nl);
for (i = 0; i < len; i++) {
VALUE element = RARRAY_PTR(self)[i];
OBJ_INFECT(result, element);
if (i > 0) rb_str_buf_append(result, delim);
rb_str_buf_append(result, shift);
element = rb_funcall(element, i_to_json, 2, Vstate, LONG2FIX(depth + 1));
Check_Type(element, T_STRING);
rb_str_buf_append(result, element);
}
rb_str_buf_append(result, state->array_nl);
if (RSTRING_LEN(state->array_nl)) {
rb_str_buf_append(result, rb_str_times(state->indent, LONG2FIX(depth)));
}
rb_str_buf_cat2(result, "]");
}
return result;
}
/*
* call-seq: to_json(state = nil, depth = 0)
*
* Returns a JSON string containing a JSON array, that is unparsed from
* this Array instance.
* _state_ is a JSON::State object, that can also be used to configure the
* produced JSON string output further.
* _depth_ is used to find out nesting depth, to indent accordingly.
*/
static VALUE mArray_to_json(int argc, VALUE *argv, VALUE self) {
VALUE Vstate, Vdepth, result;
rb_scan_args(argc, argv, "02", &Vstate, &Vdepth);
if (NIL_P(Vstate)) {
long i, len = RARRAY_LEN(self);
result = rb_str_buf_new(2 + 2 * len);
rb_str_buf_cat2(result, "[");
OBJ_INFECT(result, self);
for (i = 0; i < len; i++) {
VALUE element = RARRAY_PTR(self)[i];
OBJ_INFECT(result, element);
if (i > 0) rb_str_buf_cat2(result, ",");
element = rb_funcall(element, i_to_json, 0);
Check_Type(element, T_STRING);
rb_str_buf_append(result, element);
}
rb_str_buf_cat2(result, "]");
} else {
result = mArray_json_transfrom(self, Vstate, Vdepth);
}
OBJ_INFECT(result, self);
return result;
}
/*
* call-seq: to_json(*)
*
* Returns a JSON string representation for this Integer number.
*/
static VALUE mInteger_to_json(int argc, VALUE *argv, VALUE self)
{
return rb_funcall(self, i_to_s, 0);
}
/*
* call-seq: to_json(*)
*
* Returns a JSON string representation for this Float number.
*/
static VALUE mFloat_to_json(int argc, VALUE *argv, VALUE self)
{
JSON_Generator_State *state = NULL;
VALUE Vstate, rest, tmp;
double value = RFLOAT_VALUE(self);
rb_scan_args(argc, argv, "01*", &Vstate, &rest);
if (!NIL_P(Vstate)) Data_Get_Struct(Vstate, JSON_Generator_State, state);
if (isinf(value)) {
if (!state || state->allow_nan) {
return rb_funcall(self, i_to_s, 0);
} else {
tmp = rb_funcall(self, i_to_s, 0);
rb_raise(eGeneratorError, "%u: %s not allowed in JSON", __LINE__, StringValueCStr(tmp));
}
} else if (isnan(value)) {
if (!state || state->allow_nan) {
return rb_funcall(self, i_to_s, 0);
} else {
tmp = rb_funcall(self, i_to_s, 0);
rb_raise(eGeneratorError, "%u: %s not allowed in JSON", __LINE__, StringValueCStr(tmp));
}
} else {
return rb_funcall(self, i_to_s, 0);
}
}
/*
* call-seq: String.included(modul)
*
* Extends _modul_ with the String::Extend module.
*/
static VALUE mString_included_s(VALUE self, VALUE modul) {
return rb_funcall(modul, i_extend, 1, mString_Extend);
}
/*
* call-seq: to_json(*)
*
* This string should be encoded with UTF-8 A call to this method
* returns a JSON string encoded with UTF16 big endian characters as
* \u????.
*/
static VALUE mString_to_json(int argc, VALUE *argv, VALUE self)
{
VALUE result = rb_str_buf_new(RSTRING_LEN(self));
rb_str_buf_cat2(result, "\"");
JSON_convert_UTF8_to_JSON(result, self, strictConversion);
rb_str_buf_cat2(result, "\"");
return result;
}
/*
* call-seq: to_json_raw_object()
*
* This method creates a raw object hash, that can be nested into
* other data structures and will be unparsed as a raw string. This
* method should be used, if you want to convert raw strings to JSON
* instead of UTF-8 strings, e. g. binary data.
*/
static VALUE mString_to_json_raw_object(VALUE self) {
VALUE ary;
VALUE result = rb_hash_new();
rb_hash_aset(result, rb_funcall(mJSON, i_create_id, 0), rb_class_name(rb_obj_class(self)));
ary = rb_funcall(self, i_unpack, 1, rb_str_new2("C*"));
rb_hash_aset(result, rb_str_new2("raw"), ary);
return result;
}
/*
* call-seq: to_json_raw(*args)
*
* This method creates a JSON text from the result of a call to
* to_json_raw_object of this String.
*/
static VALUE mString_to_json_raw(int argc, VALUE *argv, VALUE self) {
VALUE obj = mString_to_json_raw_object(self);
Check_Type(obj, T_HASH);
return mHash_to_json(argc, argv, obj);
}
/*
* call-seq: json_create(o)
*
* Raw Strings are JSON Objects (the raw bytes are stored in an array for the
* key "raw"). The Ruby String can be created by this module method.
*/
static VALUE mString_Extend_json_create(VALUE self, VALUE o) {
VALUE ary;
Check_Type(o, T_HASH);
ary = rb_hash_aref(o, rb_str_new2("raw"));
return rb_funcall(ary, i_pack, 1, rb_str_new2("C*"));
}
/*
* call-seq: to_json(state = nil, depth = 0)
*
* Returns a JSON string for true: 'true'.
*/
static VALUE mTrueClass_to_json(int argc, VALUE *argv, VALUE self)
{
return rb_str_new2("true");
}
/*
* call-seq: to_json(state = nil, depth = 0)
*
* Returns a JSON string for false: 'false'.
*/
static VALUE mFalseClass_to_json(int argc, VALUE *argv, VALUE self)
{
return rb_str_new2("false");
}
/*
* call-seq: to_json(state = nil, depth = 0)
*
*/
static VALUE mNilClass_to_json(int argc, VALUE *argv, VALUE self)
{
return rb_str_new2("null");
}
/*
* call-seq: to_json(*)
*
* Converts this object to a string (calling #to_s), converts
* it to a JSON string, and returns the result. This is a fallback, if no
* special method #to_json was defined for some object.
*/
static VALUE mObject_to_json(int argc, VALUE *argv, VALUE self)
{
VALUE string = rb_funcall(self, i_to_s, 0);
Check_Type(string, T_STRING);
return mString_to_json(argc, argv, string);
}
/*
* Document-class: JSON::Ext::Generator::State
*
* This class is used to create State instances, that are use to hold data
* while generating a JSON text from a a Ruby data structure.
*/
static void State_mark(JSON_Generator_State *state)
{
rb_gc_mark_maybe(state->indent);
rb_gc_mark_maybe(state->space);
rb_gc_mark_maybe(state->space_before);
rb_gc_mark_maybe(state->object_nl);
rb_gc_mark_maybe(state->array_nl);
rb_gc_mark_maybe(state->seen);
rb_gc_mark_maybe(state->memo);
rb_gc_mark_maybe(state->depth);
}
static JSON_Generator_State *State_allocate()
{
JSON_Generator_State *state = ALLOC(JSON_Generator_State);
return state;
}
static VALUE cState_s_allocate(VALUE klass)
{
JSON_Generator_State *state = State_allocate();
return Data_Wrap_Struct(klass, State_mark, -1, state);
}
/*
* call-seq: configure(opts)
*
* Configure this State instance with the Hash _opts_, and return
* itself.
*/
static inline VALUE cState_configure(VALUE self, VALUE opts)
{
VALUE tmp;
GET_STATE(self);
tmp = rb_convert_type(opts, T_HASH, "Hash", "to_hash");
if (NIL_P(tmp)) tmp = rb_convert_type(opts, T_HASH, "Hash", "to_h");
if (NIL_P(tmp)) {
rb_raise(rb_eArgError, "opts has to be hash like or convertable into a hash");
}
opts = tmp;
tmp = rb_hash_aref(opts, ID2SYM(i_indent));
if (RTEST(tmp)) {
Check_Type(tmp, T_STRING);
state->indent = tmp;
}
tmp = rb_hash_aref(opts, ID2SYM(i_space));
if (RTEST(tmp)) {
Check_Type(tmp, T_STRING);
state->space = tmp;
}
tmp = rb_hash_aref(opts, ID2SYM(i_space_before));
if (RTEST(tmp)) {
Check_Type(tmp, T_STRING);
state->space_before = tmp;
}
tmp = rb_hash_aref(opts, ID2SYM(i_array_nl));
if (RTEST(tmp)) {
Check_Type(tmp, T_STRING);
state->array_nl = tmp;
}
tmp = rb_hash_aref(opts, ID2SYM(i_object_nl));
if (RTEST(tmp)) {
Check_Type(tmp, T_STRING);
state->object_nl = tmp;
}
tmp = ID2SYM(i_check_circular);
if (st_lookup(RHASH_TBL(opts), tmp, 0)) {
tmp = rb_hash_aref(opts, ID2SYM(i_check_circular));
state->check_circular = RTEST(tmp);
} else {
state->check_circular = 1;
}
tmp = ID2SYM(i_max_nesting);
state->max_nesting = 19;
if (st_lookup(RHASH_TBL(opts), tmp, 0)) {
VALUE max_nesting = rb_hash_aref(opts, tmp);
if (RTEST(max_nesting)) {
Check_Type(max_nesting, T_FIXNUM);
state->max_nesting = FIX2LONG(max_nesting);
} else {
state->max_nesting = 0;
}
}
tmp = rb_hash_aref(opts, ID2SYM(i_allow_nan));
state->allow_nan = RTEST(tmp);
return self;
}
/*
* call-seq: to_h
*
* Returns the configuration instance variables as a hash, that can be
* passed to the configure method.
*/
static VALUE cState_to_h(VALUE self)
{
VALUE result = rb_hash_new();
GET_STATE(self);
rb_hash_aset(result, ID2SYM(i_indent), state->indent);
rb_hash_aset(result, ID2SYM(i_space), state->space);
rb_hash_aset(result, ID2SYM(i_space_before), state->space_before);
rb_hash_aset(result, ID2SYM(i_object_nl), state->object_nl);
rb_hash_aset(result, ID2SYM(i_array_nl), state->array_nl);
rb_hash_aset(result, ID2SYM(i_check_circular), state->check_circular ? Qtrue : Qfalse);
rb_hash_aset(result, ID2SYM(i_allow_nan), state->allow_nan ? Qtrue : Qfalse);
rb_hash_aset(result, ID2SYM(i_max_nesting), LONG2FIX(state->max_nesting));
return result;
}
/*
* call-seq: new(opts = {})
*
* Instantiates a new State object, configured by _opts_.
*
* _opts_ can have the following keys:
*
* * *indent*: a string used to indent levels (default: ''),
* * *space*: a string that is put after, a : or , delimiter (default: ''),
* * *space_before*: a string that is put before a : pair delimiter (default: ''),
* * *object_nl*: a string that is put at the end of a JSON object (default: ''),
* * *array_nl*: a string that is put at the end of a JSON array (default: ''),
* * *check_circular*: true if checking for circular data structures
* should be done, false (the default) otherwise.
* * *allow_nan*: true if NaN, Infinity, and -Infinity should be
* generated, otherwise an exception is thrown, if these values are
* encountered. This options defaults to false.
*/
static VALUE cState_initialize(int argc, VALUE *argv, VALUE self)
{
VALUE opts;
GET_STATE(self);
rb_scan_args(argc, argv, "01", &opts);
state->indent = rb_str_new2("");
state->space = rb_str_new2("");
state->space_before = rb_str_new2("");
state->array_nl = rb_str_new2("");
state->object_nl = rb_str_new2("");
if (NIL_P(opts)) {
state->check_circular = 1;
state->allow_nan = 0;
state->max_nesting = 19;
} else {
cState_configure(self, opts);
}
state->seen = rb_hash_new();
state->memo = Qnil;
state->depth = INT2FIX(0);
return self;
}
/*
* call-seq: from_state(opts)
*
* Creates a State object from _opts_, which ought to be Hash to create a
* new State instance configured by _opts_, something else to create an
* unconfigured instance. If _opts_ is a State object, it is just returned.
*/
static VALUE cState_from_state_s(VALUE self, VALUE opts)
{
if (rb_obj_is_kind_of(opts, self)) {
return opts;
} else if (rb_obj_is_kind_of(opts, rb_cHash)) {
return rb_funcall(self, i_new, 1, opts);
} else {
return rb_funcall(self, i_new, 0);
}
}
/*
* call-seq: indent()
*
* This string is used to indent levels in the JSON text.
*/
static VALUE cState_indent(VALUE self)
{
GET_STATE(self);
return state->indent;
}
/*
* call-seq: indent=(indent)
*
* This string is used to indent levels in the JSON text.
*/
static VALUE cState_indent_set(VALUE self, VALUE indent)
{
GET_STATE(self);
Check_Type(indent, T_STRING);
return state->indent = indent;
}
/*
* call-seq: space()
*
* This string is used to insert a space between the tokens in a JSON
* string.
*/
static VALUE cState_space(VALUE self)
{
GET_STATE(self);
return state->space;
}
/*
* call-seq: space=(space)
*
* This string is used to insert a space between the tokens in a JSON
* string.
*/
static VALUE cState_space_set(VALUE self, VALUE space)
{
GET_STATE(self);
Check_Type(space, T_STRING);
return state->space = space;
}
/*
* call-seq: space_before()
*
* This string is used to insert a space before the ':' in JSON objects.
*/
static VALUE cState_space_before(VALUE self)
{
GET_STATE(self);
return state->space_before;
}
/*
* call-seq: space_before=(space_before)
*
* This string is used to insert a space before the ':' in JSON objects.
*/
static VALUE cState_space_before_set(VALUE self, VALUE space_before)
{
GET_STATE(self);
Check_Type(space_before, T_STRING);
return state->space_before = space_before;
}
/*
* call-seq: object_nl()
*
* This string is put at the end of a line that holds a JSON object (or
* Hash).
*/
static VALUE cState_object_nl(VALUE self)
{
GET_STATE(self);
return state->object_nl;
}
/*
* call-seq: object_nl=(object_nl)
*
* This string is put at the end of a line that holds a JSON object (or
* Hash).
*/
static VALUE cState_object_nl_set(VALUE self, VALUE object_nl)
{
GET_STATE(self);
Check_Type(object_nl, T_STRING);
return state->object_nl = object_nl;
}
/*
* call-seq: array_nl()
*
* This string is put at the end of a line that holds a JSON array.
*/
static VALUE cState_array_nl(VALUE self)
{
GET_STATE(self);
return state->array_nl;
}
/*
* call-seq: array_nl=(array_nl)
*
* This string is put at the end of a line that holds a JSON array.
*/
static VALUE cState_array_nl_set(VALUE self, VALUE array_nl)
{
GET_STATE(self);
Check_Type(array_nl, T_STRING);
return state->array_nl = array_nl;
}
/*
* call-seq: check_circular?
*
* Returns true, if circular data structures should be checked,
* otherwise returns false.
*/
static VALUE cState_check_circular_p(VALUE self)
{
GET_STATE(self);
return state->check_circular ? Qtrue : Qfalse;
}
/*
* call-seq: max_nesting
*
* This integer returns the maximum level of data structure nesting in
* the generated JSON, max_nesting = 0 if no maximum is checked.
*/
static VALUE cState_max_nesting(VALUE self)
{
GET_STATE(self);
return LONG2FIX(state->max_nesting);
}
/*
* call-seq: max_nesting=(depth)
*
* This sets the maximum level of data structure nesting in the generated JSON
* to the integer depth, max_nesting = 0 if no maximum should be checked.
*/
static VALUE cState_max_nesting_set(VALUE self, VALUE depth)
{
GET_STATE(self);
Check_Type(depth, T_FIXNUM);
state->max_nesting = FIX2LONG(depth);
return Qnil;
}
/*
* call-seq: allow_nan?
*
* Returns true, if NaN, Infinity, and -Infinity should be generated, otherwise
* returns false.
*/
static VALUE cState_allow_nan_p(VALUE self)
{
GET_STATE(self);
return state->allow_nan ? Qtrue : Qfalse;
}
/*
* call-seq: seen?(object)
*
* Returns _true_, if _object_ was already seen during this generating run.
*/
static VALUE cState_seen_p(VALUE self, VALUE object)
{
GET_STATE(self);
return rb_hash_aref(state->seen, rb_obj_id(object));
}
/*
* call-seq: remember(object)
*
* Remember _object_, to find out if it was already encountered (if a cyclic
* data structure is rendered).
*/
static VALUE cState_remember(VALUE self, VALUE object)
{
GET_STATE(self);
return rb_hash_aset(state->seen, rb_obj_id(object), Qtrue);
}
/*
* call-seq: forget(object)
*
* Forget _object_ for this generating run.
*/
static VALUE cState_forget(VALUE self, VALUE object)
{
GET_STATE(self);
return rb_hash_delete(state->seen, rb_obj_id(object));
}
/*
*
*/
void Init_generator()
{
rb_require("json/common");
mJSON = rb_define_module("JSON");
mExt = rb_define_module_under(mJSON, "Ext");
mGenerator = rb_define_module_under(mExt, "Generator");
eGeneratorError = rb_path2class("JSON::GeneratorError");
eCircularDatastructure = rb_path2class("JSON::CircularDatastructure");
eNestingError = rb_path2class("JSON::NestingError");
cState = rb_define_class_under(mGenerator, "State", rb_cObject);
rb_define_alloc_func(cState, cState_s_allocate);
rb_define_singleton_method(cState, "from_state", cState_from_state_s, 1);
rb_define_method(cState, "initialize", cState_initialize, -1);
rb_define_method(cState, "indent", cState_indent, 0);
rb_define_method(cState, "indent=", cState_indent_set, 1);
rb_define_method(cState, "space", cState_space, 0);
rb_define_method(cState, "space=", cState_space_set, 1);
rb_define_method(cState, "space_before", cState_space_before, 0);
rb_define_method(cState, "space_before=", cState_space_before_set, 1);
rb_define_method(cState, "object_nl", cState_object_nl, 0);
rb_define_method(cState, "object_nl=", cState_object_nl_set, 1);
rb_define_method(cState, "array_nl", cState_array_nl, 0);
rb_define_method(cState, "array_nl=", cState_array_nl_set, 1);
rb_define_method(cState, "check_circular?", cState_check_circular_p, 0);
rb_define_method(cState, "max_nesting", cState_max_nesting, 0);
rb_define_method(cState, "max_nesting=", cState_max_nesting_set, 1);
rb_define_method(cState, "allow_nan?", cState_allow_nan_p, 0);
rb_define_method(cState, "seen?", cState_seen_p, 1);
rb_define_method(cState, "remember", cState_remember, 1);
rb_define_method(cState, "forget", cState_forget, 1);
rb_define_method(cState, "configure", cState_configure, 1);
rb_define_method(cState, "to_h", cState_to_h, 0);
mGeneratorMethods = rb_define_module_under(mGenerator, "GeneratorMethods");
mObject = rb_define_module_under(mGeneratorMethods, "Object");
rb_define_method(mObject, "to_json", mObject_to_json, -1);
mHash = rb_define_module_under(mGeneratorMethods, "Hash");
rb_define_method(mHash, "to_json", mHash_to_json, -1);
mArray = rb_define_module_under(mGeneratorMethods, "Array");
rb_define_method(mArray, "to_json", mArray_to_json, -1);
mInteger = rb_define_module_under(mGeneratorMethods, "Integer");
rb_define_method(mInteger, "to_json", mInteger_to_json, -1);
mFloat = rb_define_module_under(mGeneratorMethods, "Float");
rb_define_method(mFloat, "to_json", mFloat_to_json, -1);
mString = rb_define_module_under(mGeneratorMethods, "String");
rb_define_singleton_method(mString, "included", mString_included_s, 1);
rb_define_method(mString, "to_json", mString_to_json, -1);
rb_define_method(mString, "to_json_raw", mString_to_json_raw, -1);
rb_define_method(mString, "to_json_raw_object", mString_to_json_raw_object, 0);
mString_Extend = rb_define_module_under(mString, "Extend");
rb_define_method(mString_Extend, "json_create", mString_Extend_json_create, 1);
mTrueClass = rb_define_module_under(mGeneratorMethods, "TrueClass");
rb_define_method(mTrueClass, "to_json", mTrueClass_to_json, -1);
mFalseClass = rb_define_module_under(mGeneratorMethods, "FalseClass");
rb_define_method(mFalseClass, "to_json", mFalseClass_to_json, -1);
mNilClass = rb_define_module_under(mGeneratorMethods, "NilClass");
rb_define_method(mNilClass, "to_json", mNilClass_to_json, -1);
i_to_s = rb_intern("to_s");
i_to_json = rb_intern("to_json");
i_new = rb_intern("new");
i_indent = rb_intern("indent");
i_space = rb_intern("space");
i_space_before = rb_intern("space_before");
i_object_nl = rb_intern("object_nl");
i_array_nl = rb_intern("array_nl");
i_check_circular = rb_intern("check_circular");
i_max_nesting = rb_intern("max_nesting");
i_allow_nan = rb_intern("allow_nan");
i_pack = rb_intern("pack");
i_unpack = rb_intern("unpack");
i_create_id = rb_intern("create_id");
i_extend = rb_intern("extend");
}
![[top]](../icons/top.png){kind=icon}
![[bottom]](../icons/n_bottom.png){kind=icon}