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c enc/decoder for new-style dbrefs

This commit is contained in:
Mike Dirolf 2009-03-18 13:54:33 -04:00
parent 5545f3c943
commit e60387f2fe
1 changed files with 26 additions and 13 deletions
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37
ext/cbson/cbson.c
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@ -273,21 +273,22 @@ static int write_element_allow_id(VALUE key, VALUE value, VALUE extra, int allow
break;
}
if (strcmp(cls, "XGen::Mongo::Driver::DBRef") == 0) {
write_name_and_type(buffer, key, 0x0C);
write_name_and_type(buffer, key, 0x03);
int start_position = buffer->position;
// save space for length
int length_location = buffer_save_bytes(buffer, 4);
VALUE ns = rb_funcall(value, rb_intern("namespace"), 0);
int length = RSTRING(ns)->len + 1;
buffer_write_bytes(buffer, (char*)&length, 4);
buffer_write_bytes(buffer, RSTRING(ns)->ptr, length - 1);
buffer_write_bytes(buffer, &zero, 1);
write_element(rb_str_new2("$ref"), ns, (VALUE)buffer);
VALUE oid = rb_funcall(value, rb_intern("object_id"), 0);
write_element(rb_str_new2("$id"), oid, (VALUE)buffer);
VALUE oid_as_array = rb_funcall(rb_funcall(value, rb_intern("object_id"), 0),
rb_intern("to_a"), 0);
int i;
for (i = 0; i < 12; i++) {
char byte = (char)FIX2INT(RARRAY(oid_as_array)->ptr[i]);
buffer_write_bytes(buffer, &byte, 1);
}
// write null byte and fill in length
buffer_write_bytes(buffer, &zero, 1);
int obj_length = buffer->position - start_position;
memcpy(buffer->buffer + length_location, &obj_length, 4);
break;
}
if (strcmp(cls, "XGen::Mongo::Driver::Undefined") == 0) {
@ -424,7 +425,19 @@ static VALUE get_value(const char* buffer, int* position, int type) {
{
int size;
memcpy(&size, buffer + *position, 4);
if (strcmp(buffer + *position + 5, "$ref") == 0) { // DBRef
int offset = *position + 14;
VALUE argv[2];
int collection_length = strlen(buffer + offset);
argv[0] = rb_str_new(buffer + offset, collection_length);
offset += collection_length + 1;
char id_type = buffer[offset];
offset += 5;
argv[1] = get_value(buffer, &offset, (int)id_type);
value = rb_class_new_instance(2, argv, DBRef);
} else {
value = elements_to_hash(buffer + *position + 4, size - 5);
}
*position += size;
break;
}