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#include <ruby.h>
#include <yajl/yajl_parse.h>
#ifdef HAVE_RUBY_ENCODING_H
#include <ruby/encoding.h>
static rb_encoding *utf8Encoding;
#endif
static VALUE mFFI_Yajl, mExt, mParser, cParseError;
typedef struct {
VALUE self;
int symbolizeKeys;
int uniqueKeyChecking;
} CTX;
void set_value(CTX *ctx, VALUE val) {
VALUE stack = rb_ivar_get(ctx->self, rb_intern("stack"));
VALUE key = rb_ivar_get(ctx->self, rb_intern("key"));
long len = RARRAY_LEN(stack);
VALUE last = rb_ary_entry(stack, len-1);
switch (TYPE(last)) {
case T_ARRAY:
rb_ary_push(last, val);
break;
case T_HASH:
if ( ((CTX *)ctx)->uniqueKeyChecking ) {
ID sym_has_key = rb_intern("has_key?");
if ( rb_funcall(last, sym_has_key, 1, key) == Qtrue ) {
rb_raise(cParseError, "repeated key: %s", RSTRING_PTR(key));
}
}
rb_hash_aset(last, key, val);
break;
default:
rb_ary_push(stack, val);
break;
}
}
void set_key(CTX *ctx, VALUE key) {
rb_ivar_set(ctx->self, rb_intern("key"), key);
}
void start_object(CTX *ctx, VALUE obj) {
VALUE key_stack = rb_ivar_get(ctx->self, rb_intern("key_stack"));
VALUE key = rb_ivar_get(ctx->self, rb_intern("key"));
VALUE stack = rb_ivar_get(ctx->self, rb_intern("stack"));
rb_ary_push(key_stack, key);
rb_ary_push(stack, obj);
}
void end_object(CTX *ctx) {
VALUE key_stack = rb_ivar_get(ctx->self, rb_intern("key_stack"));
VALUE stack = rb_ivar_get(ctx->self, rb_intern("stack"));
rb_ivar_set(ctx->self, rb_intern("key"), rb_ary_pop(key_stack));
if ( RARRAY_LEN(stack) > 1 ) {
set_value(ctx, rb_ary_pop(stack));
}
}
int null_callback(void *ctx) {
set_value(ctx, Qnil);
return 1;
}
int boolean_callback(void *ctx, int boolean) {
set_value(ctx, boolean ? Qtrue : Qfalse);
return 1;
}
int integer_callback(void *ctx, long long intVal) {
set_value(ctx, LONG2NUM(intVal));
return 1;
}
int double_callback(void *ctx, double doubleVal) {
set_value(ctx, rb_float_new(doubleVal));
return 1;
}
int number_callback(void *ctx, const char *numberVal, size_t numberLen) {
char *buf = (char *)malloc(numberLen+1);
buf[numberLen] = 0;
memcpy(buf, numberVal, numberLen);
if (memchr(buf, '.', numberLen) ||
memchr(buf, 'e', numberLen) ||
memchr(buf, 'E', numberLen)) {
set_value(ctx, rb_float_new(strtod(buf, NULL)));
} else {
set_value(ctx, rb_cstr2inum(buf, 10));
}
free(buf);
return 1;
}
int string_callback(void *ctx, const unsigned char *stringVal, size_t stringLen) {
VALUE str = rb_str_new((const char *)stringVal, stringLen);
#ifdef HAVE_RUBY_ENCODING_H
rb_encoding *default_internal_enc = rb_default_internal_encoding();
rb_enc_associate(str, utf8Encoding);
if (default_internal_enc) {
str = rb_str_export_to_enc(str, default_internal_enc);
}
#endif
set_value(ctx,str);
return 1;
}
int start_map_callback(void *ctx) {
start_object(ctx,rb_hash_new());
return 1;
}
int map_key_callback(void *ctx, const unsigned char *stringVal, size_t stringLen) {
VALUE key;
#ifdef HAVE_RUBY_ENCODING_H
rb_encoding *default_internal_enc;
#endif
if ( ((CTX *)ctx)->symbolizeKeys ) {
#ifdef HAVE_RUBY_ENCODING_H
ID id = rb_intern3((const char *)stringVal, stringLen, utf8Encoding);
key = ID2SYM(id);
#else
VALUE str = rb_str_new((const char *)stringVal, stringLen);
key = rb_str_intern(str);
#endif
} else {
key = rb_str_new((const char *)stringVal, stringLen);
#ifdef HAVE_RUBY_ENCODING_H
default_internal_enc = rb_default_internal_encoding();
rb_enc_associate(key, utf8Encoding);
if (default_internal_enc) {
key = rb_str_export_to_enc(key, default_internal_enc);
}
#endif
}
set_key(ctx, key);
return 1;
}
int end_map_callback(void *ctx) {
end_object(ctx);
return 1;
}
int start_array_callback(void *ctx) {
start_object(ctx,rb_ary_new());
return 1;
}
int end_array_callback(void *ctx) {
end_object(ctx);
return 1;
}
static yajl_callbacks callbacks = {
null_callback,
boolean_callback,
integer_callback,
double_callback,
number_callback,
string_callback,
start_map_callback,
map_key_callback,
end_map_callback,
start_array_callback,
end_array_callback,
};
int get_opts_key(VALUE self, const char *key) {
VALUE opts = rb_iv_get(self, "@opts");
if (TYPE(opts) != T_HASH) {
rb_raise(rb_eTypeError, "opts is not a valid hash");
}
return rb_hash_aref(opts, ID2SYM(rb_intern(key))) == Qtrue;
}
static VALUE mParser_do_yajl_parse(VALUE self, VALUE str, VALUE yajl_opts) {
yajl_handle hand;
yajl_status stat;
unsigned char *err;
volatile CTX ctx;
rb_ivar_set(self, rb_intern("stack"), rb_ary_new());
rb_ivar_set(self, rb_intern("key_stack"), rb_ary_new());
ctx.self = self;
ctx.symbolizeKeys = get_opts_key(self, "symbolize_keys");
ctx.uniqueKeyChecking = get_opts_key(self, "unique_key_checking");
hand = yajl_alloc(&callbacks, NULL, (void *)&ctx);
if (rb_hash_aref(yajl_opts, ID2SYM(rb_intern("yajl_allow_comments"))) == Qtrue) {
yajl_config(hand, yajl_allow_comments, 1);
}
if (rb_hash_aref(yajl_opts, ID2SYM(rb_intern("yajl_dont_validate_strings"))) == Qtrue) {
yajl_config(hand, yajl_dont_validate_strings, 1);
}
if (rb_hash_aref(yajl_opts, ID2SYM(rb_intern("yajl_allow_trailing_garbage"))) == Qtrue) {
yajl_config(hand, yajl_allow_trailing_garbage, 1);
}
if (rb_hash_aref(yajl_opts, ID2SYM(rb_intern("yajl_allow_multiple_values"))) == Qtrue) {
yajl_config(hand, yajl_allow_multiple_values, 1);
}
if (rb_hash_aref(yajl_opts, ID2SYM(rb_intern("yajl_allow_partial_values"))) == Qtrue) {
yajl_config(hand, yajl_allow_partial_values, 1);
}
if ((stat = yajl_parse(hand, (unsigned char *)RSTRING_PTR(str), RSTRING_LEN(str))) != yajl_status_ok) {
err = yajl_get_error(hand, 1, (unsigned char *)RSTRING_PTR(str), RSTRING_LEN(str));
goto raise;
}
if ((stat = yajl_complete_parse(hand)) != yajl_status_ok) {
err = yajl_get_error(hand, 1, (unsigned char *)RSTRING_PTR(str), RSTRING_LEN(str));
goto raise;
}
yajl_free(hand);
return rb_ary_pop(rb_ivar_get(self, rb_intern("stack")));
raise:
if (hand) {
yajl_free(hand);
}
rb_raise(cParseError, "%s", err);
}
void Init_parser() {
mFFI_Yajl = rb_define_module("FFI_Yajl");
cParseError = rb_define_class_under(mFFI_Yajl, "ParseError", rb_eStandardError);
mExt = rb_define_module_under(mFFI_Yajl, "Ext");
mParser = rb_define_module_under(mExt, "Parser");
rb_define_method(mParser, "do_yajl_parse", mParser_do_yajl_parse, 2);
#ifdef HAVE_RUBY_ENCODING_H
utf8Encoding = rb_utf8_encoding();
#endif
}
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