Example #1
0
/* =============================================================================
   Function:		Initialize	// local //
   Author:		Rammi
   Date:		11.04.1996

   Return:		---
   Parameter:		---

   Purpose:		Necessary initializations

   ============================================================================= */
static void Initialize(void)
{
  int i;

#ifndef SILENT
  fprintf(stderr,
	  HEAD "rmalloc -- malloc wrapper V " VERSION "\n"
	  "\tby Rammi <mailto:[email protected]>\n"
	  "\tCompiled with following options:\n"
#if RM_TEST_DEPTH==1
	  "\t\ttesting:\tonly actual block\n"
#elif RM_TEST_DEPTH==2
	  "\t\ttesting:\tall allocated blocks\n"
#else
	  "\t\ttesting:\tcomment missing in " __FILE__ ":" INT2STRING(__LINE__) "\n"
#endif
#ifdef GENERATIONS
	  "\t\tgenerations:\tON\n"
#else
	  "\t\tgenerations:\tOFF\n"
#endif
#ifdef ELOQUENT
	  "\t\teloquence:\tON\n"
#else
	  "\t\teloquence:\tOFF\n"
#endif
#ifdef ALLOW_REALLOC_NULL
	  "\t\trealloc(0):\tALLOWED\n"
#else
	  "\t\trealloc(0):\tNOT ALLOWED\n"
#endif
#ifdef ALLOW_FREE_NULL
	  "\t\tfree(0):\tALLOWED\n"
#else
	  "\t\tfree(0):\tNOT ALLOWED\n"
#endif
#ifdef WITH_FLAGS
	  "\t\tflags:  \tUSED\n"
#else
	  "\t\tflags:  \tUNUSED\n"
#endif
	  "\t\talignment:\t" INT2STRING(ALIGNMENT) "\n"
	  "\t\tpre space:\t%d\n"
	   "\t\tpost space:\t%d\n"
	  "\t\thash tab size:\t" INT2STRING(HASHSIZE) "\n\n",
	  START_SPACE, END_SPACE);
#endif /* ndef SILENT */

  /* --- init list heads --- */
  for (i = 0;   i < HASHSIZE;   i++) {
    memcpy(Chain+i, &ChainTempl, sizeof(begin));
    Chain[i].Next = Chain[i].Prev = Chain+i;
  }

  /* --- show statistics at exit --- */
  (void)atexit(Exit);

  Global.isInitialized = 1;
}
Example #2
0
static int write_element(VALUE key, VALUE value, VALUE extra, int allow_id) {
    buffer_t buffer = (buffer_t)NUM2LL(rb_ary_entry(extra, 0));
    VALUE check_keys = rb_ary_entry(extra, 1);

    if (TYPE(key) == T_SYMBOL) {
        // TODO better way to do this... ?
        key = rb_str_new2(rb_id2name(SYM2ID(key)));
    }

    if (TYPE(key) != T_STRING) {
        bson_buffer_free(buffer);
        rb_raise(rb_eTypeError, "keys must be strings or symbols");
    }

    if (allow_id == 0 && strcmp("_id", RSTRING_PTR(key)) == 0) {
        return ST_CONTINUE;
    }

    if (check_keys == Qtrue) {
        int i;
        if (RSTRING_LEN(key) > 0 && RSTRING_PTR(key)[0] == '$') {
            bson_buffer_free(buffer);
            rb_raise(InvalidKeyName, "%s - key must not start with '$'", RSTRING_PTR(key));
        }
        for (i = 0; i < RSTRING_LEN(key); i++) {
            if (RSTRING_PTR(key)[i] == '.') {
                bson_buffer_free(buffer);
                rb_raise(InvalidKeyName, "%s - key must not contain '.'", RSTRING_PTR(key));
            }
        }
    }

    switch(TYPE(value)) {
    case T_BIGNUM:
        {
            if (rb_funcall(value, gt_operator, 1, LL2NUM(9223372036854775807LL)) == Qtrue ||
                rb_funcall(value, lt_operator, 1, LL2NUM(-9223372036854775808ULL)) == Qtrue) {
                bson_buffer_free(buffer);
                rb_raise(rb_eRangeError, "MongoDB can only handle 8-byte ints");
            }
        }
        // NOTE: falls through to T_FIXNUM code
    case T_FIXNUM:
        {
            long long ll_value;
            ll_value = NUM2LL(value);

            if (ll_value > 2147483647LL ||
                ll_value < -2147483648LL) {
                write_name_and_type(buffer, key, 0x12);
                SAFE_WRITE(buffer, (char*)&ll_value, 8);
            } else {
                int int_value;
                write_name_and_type(buffer, key, 0x10);
                int_value = (int)ll_value;
                SAFE_WRITE(buffer, (char*)&int_value, 4);
            }
            break;
        }
    case T_TRUE:
        {
            write_name_and_type(buffer, key, 0x08);
            SAFE_WRITE(buffer, &one, 1);
            break;
        }
    case T_FALSE:
        {
            write_name_and_type(buffer, key, 0x08);
            SAFE_WRITE(buffer, &zero, 1);
            break;
        }
    case T_FLOAT:
        {
            double d = NUM2DBL(value);
            write_name_and_type(buffer, key, 0x01);
            SAFE_WRITE(buffer, (char*)&d, 8);
            break;
        }
    case T_NIL:
        {
            write_name_and_type(buffer, key, 0x0A);
            break;
        }
    case T_HASH:
        {
            write_name_and_type(buffer, key, 0x03);
            write_doc(buffer, value, check_keys, Qfalse);
            break;
        }
    case T_ARRAY:
        {
            buffer_position length_location, start_position, obj_length;
            int items, i;
            VALUE* values;

            write_name_and_type(buffer, key, 0x04);
            start_position = buffer_get_position(buffer);

            // save space for length
            length_location = buffer_save_space(buffer, 4);
            if (length_location == -1) {
                rb_raise(rb_eNoMemError, "failed to allocate memory in buffer.c");
            }

            items = RARRAY_LENINT(value);
            for(i = 0; i < items; i++) {
                char* name;
                VALUE key;
                INT2STRING(&name, i);
                key = rb_str_new2(name);
                write_element_with_id(key, rb_ary_entry(value, i), pack_extra(buffer, check_keys));
                FREE_INTSTRING(name);
            }

            // write null byte and fill in length
            SAFE_WRITE(buffer, &zero, 1);
            obj_length = buffer_get_position(buffer) - start_position;
            SAFE_WRITE_AT_POS(buffer, length_location, (const char*)&obj_length, 4);
            break;
        }
    case T_STRING:
        {
            int length;
            write_name_and_type(buffer, key, 0x02);
            length = RSTRING_LENINT(value) + 1;
            SAFE_WRITE(buffer, (char*)&length, 4);
            write_utf8(buffer, value, 0);
            SAFE_WRITE(buffer, &zero, 1);
            break;
        }
    case T_SYMBOL:
        {
            const char* str_value = rb_id2name(SYM2ID(value));
            int length = (int)strlen(str_value) + 1;
            write_name_and_type(buffer, key, 0x0E);
            SAFE_WRITE(buffer, (char*)&length, 4);
            SAFE_WRITE(buffer, str_value, length);
            break;
        }
    case T_OBJECT:
        {
            // TODO there has to be a better way to do these checks...
            const char* cls = rb_obj_classname(value);
            if (strcmp(cls, "BSON::Binary") == 0 ||
                strcmp(cls, "ByteBuffer") == 0) {
                const char subtype = strcmp(cls, "ByteBuffer") ?
                    (const char)FIX2INT(rb_funcall(value, rb_intern("subtype"), 0)) : 2;
                VALUE string_data = rb_funcall(value, rb_intern("to_s"), 0);
                int length = RSTRING_LENINT(string_data);
                write_name_and_type(buffer, key, 0x05);
                if (subtype == 2) {
                    const int other_length = length + 4;
                    SAFE_WRITE(buffer, (const char*)&other_length, 4);
                    SAFE_WRITE(buffer, &subtype, 1);
                }
                SAFE_WRITE(buffer, (const char*)&length, 4);
                if (subtype != 2) {
                    SAFE_WRITE(buffer, &subtype, 1);
                }
                SAFE_WRITE(buffer, RSTRING_PTR(string_data), length);
                break;
            }
            if (strcmp(cls, "BSON::ObjectId") == 0) {
                VALUE as_array = rb_funcall(value, rb_intern("to_a"), 0);
                int i;
                write_name_and_type(buffer, key, 0x07);
                for (i = 0; i < 12; i++) {
                    char byte = (char)FIX2INT(rb_ary_entry(as_array, i));
                    SAFE_WRITE(buffer, &byte, 1);
                }
                break;
            }
            if (strcmp(cls, "BSON::DBRef") == 0) {
                buffer_position length_location, start_position, obj_length;
                VALUE ns, oid;
                write_name_and_type(buffer, key, 0x03);

                start_position = buffer_get_position(buffer);

                // save space for length
                length_location = buffer_save_space(buffer, 4);
                if (length_location == -1) {
                    rb_raise(rb_eNoMemError, "failed to allocate memory in buffer.c");
                }

                ns = rb_funcall(value, rb_intern("namespace"), 0);
                write_element_with_id(rb_str_new2("$ref"), ns, pack_extra(buffer, Qfalse));
                oid = rb_funcall(value, rb_intern("object_id"), 0);
                write_element_with_id(rb_str_new2("$id"), oid, pack_extra(buffer, Qfalse));

                // write null byte and fill in length
                SAFE_WRITE(buffer, &zero, 1);
                obj_length = buffer_get_position(buffer) - start_position;
                SAFE_WRITE_AT_POS(buffer, length_location, (const char*)&obj_length, 4);
                break;
            }
            if (strcmp(cls, "BSON::Code") == 0) {
                buffer_position length_location, start_position, total_length;
                int length;
                VALUE code_str;
                write_name_and_type(buffer, key, 0x0F);

                start_position = buffer_get_position(buffer);
                length_location = buffer_save_space(buffer, 4);
                if (length_location == -1) {
                    rb_raise(rb_eNoMemError, "failed to allocate memory in buffer.c");
                }

                code_str = rb_funcall(value, rb_intern("code"), 0);
                length = RSTRING_LENINT(code_str) + 1;
                SAFE_WRITE(buffer, (char*)&length, 4);
                SAFE_WRITE(buffer, RSTRING_PTR(code_str), length - 1);
                SAFE_WRITE(buffer, &zero, 1);
                write_doc(buffer, rb_funcall(value, rb_intern("scope"), 0), Qfalse, Qfalse);

                total_length = buffer_get_position(buffer) - start_position;
                SAFE_WRITE_AT_POS(buffer, length_location, (const char*)&total_length, 4);
                break;
            }
            if (strcmp(cls, "BSON::MaxKey") == 0) {
                write_name_and_type(buffer, key, 0x7f);
                break;
            }
            if (strcmp(cls, "BSON::MinKey") == 0) {
                write_name_and_type(buffer, key, 0xff);
                break;
            }
            if (strcmp(cls, "BSON::Timestamp") == 0) {
                write_name_and_type(buffer, key, 0x11);
                int seconds = FIX2INT(
                    rb_funcall(value, rb_intern("seconds"), 0));
                int increment = FIX2INT(
                    rb_funcall(value, rb_intern("increment"), 0));

                SAFE_WRITE(buffer, (const char*)&increment, 4);
                SAFE_WRITE(buffer, (const char*)&seconds, 4);
                break;
            }
            if (strcmp(cls, "DateTime") == 0 || strcmp(cls, "Date") == 0 || strcmp(cls, "ActiveSupport::TimeWithZone") == 0) {
                bson_buffer_free(buffer);
                rb_raise(InvalidDocument, "%s is not currently supported; use a UTC Time instance instead.", cls);
                break;
            }
            if(strcmp(cls, "Complex") == 0 || strcmp(cls, "Rational") == 0 || strcmp(cls, "BigDecimal") == 0) {
                bson_buffer_free(buffer);
                rb_raise(InvalidDocument, "Cannot serialize the Numeric type %s as BSON; only Bignum, Fixnum, and Float are supported.", cls);
                break;
            }
            bson_buffer_free(buffer);
            rb_raise(InvalidDocument, "Cannot serialize an object of class %s into BSON.", cls);
            break;
        }
    case T_DATA:
        {
            const char* cls = rb_obj_classname(value);
            if (strcmp(cls, "Time") == 0) {
                double t = NUM2DBL(rb_funcall(value, rb_intern("to_f"), 0));
                long long time_since_epoch = (long long)round(t * 1000);
                write_name_and_type(buffer, key, 0x09);
                SAFE_WRITE(buffer, (const char*)&time_since_epoch, 8);
                break;
            }
            if(strcmp(cls, "BigDecimal") == 0) {
                bson_buffer_free(buffer);
                rb_raise(InvalidDocument, "Cannot serialize the Numeric type %s as BSON; only Bignum, Fixnum, and Float are supported.", cls);
                break;
            }
            bson_buffer_free(buffer);
            rb_raise(InvalidDocument, "Cannot serialize an object of class %s into BSON.", cls);
            break;
        }
    case T_REGEXP:
        {
            VALUE pattern = RREGEXP_SRC(value);
            long flags = RREGEXP_OPTIONS(value);
            VALUE has_extra;

            write_name_and_type(buffer, key, 0x0B);

            write_utf8(buffer, pattern, 1);
            SAFE_WRITE(buffer, &zero, 1);

            if (flags & IGNORECASE) {
                char ignorecase = 'i';
                SAFE_WRITE(buffer, &ignorecase, 1);
            }
            if (flags & MULTILINE) {
                char multiline = 'm';
                char dotall = 's';
                SAFE_WRITE(buffer, &multiline, 1);
                SAFE_WRITE(buffer, &dotall, 1);
            }
            if (flags & EXTENDED) {
                char extended = 'x';
                SAFE_WRITE(buffer, &extended, 1);
            }

            has_extra = rb_funcall(value, rb_intern("respond_to?"), 1, rb_str_new2("extra_options_str"));
            if (TYPE(has_extra) == T_TRUE) {
                VALUE extra = rb_funcall(value, rb_intern("extra_options_str"), 0);
                buffer_position old_position = buffer_get_position(buffer);
                SAFE_WRITE(buffer, RSTRING_PTR(extra), RSTRING_LENINT(extra));
                qsort(buffer_get_buffer(buffer) + old_position, RSTRING_LEN(extra), sizeof(char), cmp_char);
            }
            SAFE_WRITE(buffer, &zero, 1);

            break;
        }
    default:
        {
            const char* cls = rb_obj_classname(value);
            bson_buffer_free(buffer);
            rb_raise(InvalidDocument, "Cannot serialize an object of class %s (type %d) into BSON.", cls, TYPE(value));
            break;
        }
    }
    return ST_CONTINUE;
}
Example #3
0
static int write_element_allow_id(VALUE key, VALUE value, VALUE extra, int allow_id) {
    bson_buffer* buffer = (bson_buffer*)NUM2LL(rb_ary_entry(extra, 0));
    VALUE check_keys = rb_ary_entry(extra, 1);

    if (TYPE(key) == T_SYMBOL) {
        // TODO better way to do this... ?
        key = rb_str_new2(rb_id2name(SYM2ID(key)));
    }

    if (TYPE(key) != T_STRING) {
        rb_raise(rb_eTypeError, "keys must be strings or symbols");
    }

    if (!allow_id && strcmp("_id", RSTRING_PTR(key)) == 0) {
        return ST_CONTINUE;
    }

    if (check_keys == Qtrue) {
        int i;
        if (RSTRING_LEN(key) > 0 && RSTRING_PTR(key)[0] == '$') {
            rb_raise(InvalidName, "key must not start with '$'");
        }
        for (i = 0; i < RSTRING_LEN(key); i++) {
            if (RSTRING_PTR(key)[i] == '.') {
                rb_raise(InvalidName, "key must not contain '.'");
            }
        }
    }

    switch(TYPE(value)) {
    case T_BIGNUM:
    case T_FIXNUM:
        {
            if (rb_funcall(value, rb_intern(">"), 1, LL2NUM(9223372036854775807LL)) == Qtrue ||
                rb_funcall(value, rb_intern("<"), 1, LL2NUM(-9223372036854775808LL)) == Qtrue) {
                rb_raise(rb_eRangeError, "MongoDB can only handle 8-byte ints");
            }
            if (rb_funcall(value, rb_intern(">"), 1, INT2NUM(2147483647L)) == Qtrue ||
                rb_funcall(value, rb_intern("<"), 1, INT2NUM(-2147483648L)) == Qtrue) {
                long long ll_value;
                write_name_and_type(buffer, key, 0x12);
                ll_value = NUM2LL(value);
                buffer_write_bytes(buffer, (char*)&ll_value, 8);
            } else {
                int int_value;
                write_name_and_type(buffer, key, 0x10);
                int_value = NUM2LL(value);
                buffer_write_bytes(buffer, (char*)&int_value, 4);
            }
            break;
        }
    case T_TRUE:
        {
            write_name_and_type(buffer, key, 0x08);
            buffer_write_bytes(buffer, &one, 1);
            break;
        }
    case T_FALSE:
        {
            write_name_and_type(buffer, key, 0x08);
            buffer_write_bytes(buffer, &zero, 1);
            break;
        }
    case T_FLOAT:
        {
            double d = NUM2DBL(value);
            write_name_and_type(buffer, key, 0x01);
            buffer_write_bytes(buffer, (char*)&d, 8);
            break;
        }
    case T_NIL:
        {
            write_name_and_type(buffer, key, 0x0A);
            break;
        }
    case T_HASH:
        {
            write_name_and_type(buffer, key, 0x03);
            write_doc(buffer, value, check_keys);
            break;
        }
    case T_ARRAY:
        {
		    char name[I2S_BUFFER_SIZE];
            int start_position, length_location, items, i, obj_length;
            VALUE* values;

            write_name_and_type(buffer, key, 0x04);
            start_position = buffer->position;

            // save space for length
            length_location = buffer_save_bytes(buffer, 4);

            items = RARRAY_LEN(value);
            values = RARRAY_PTR(value);
            for(i = 0; i < items; i++) {
                VALUE key;
                INT2STRING(name,I2S_BUFFER_SIZE,i);
                key = rb_str_new2(name);
                write_element(key, values[i], pack_extra(buffer, check_keys));
            }

            // write null byte and fill in length
            buffer_write_bytes(buffer, &zero, 1);
            obj_length = buffer->position - start_position;
            memcpy(buffer->buffer + length_location, &obj_length, 4);
            break;
        }
    case T_STRING:
        {
            if (strcmp(rb_class2name(RBASIC(value)->klass),
                       "Mongo::Code") == 0) {
                int start_position, length_location, length, total_length;
                write_name_and_type(buffer, key, 0x0F);

                start_position = buffer->position;
                length_location = buffer_save_bytes(buffer, 4);

                length = RSTRING_LEN(value) + 1;
                buffer_write_bytes(buffer, (char*)&length, 4);
                buffer_write_bytes(buffer, RSTRING_PTR(value), length - 1);
                buffer_write_bytes(buffer, &zero, 1);
                write_doc(buffer, rb_funcall(value, rb_intern("scope"), 0), Qfalse);

                total_length = buffer->position - start_position;
                memcpy(buffer->buffer + length_location, &total_length, 4);

                break;
            } else {
                int length = RSTRING_LEN(value) + 1;
                write_name_and_type(buffer, key, 0x02);
                buffer_write_bytes(buffer, (char*)&length, 4);
                buffer_write_bytes(buffer, RSTRING_PTR(value), length - 1);
                buffer_write_bytes(buffer, &zero, 1);
                break;
            }
        }
    case T_SYMBOL:
        {
            const char* str_value = rb_id2name(SYM2ID(value));
            int length = strlen(str_value) + 1;
            write_name_and_type(buffer, key, 0x0E);
            buffer_write_bytes(buffer, (char*)&length, 4);
            buffer_write_bytes(buffer, str_value, length);
            break;
        }
    case T_OBJECT:
        {
            // TODO there has to be a better way to do these checks...
            const char* cls = rb_class2name(RBASIC(value)->klass);
            if (strcmp(cls, "Mongo::Binary") == 0 ||
                strcmp(cls, "ByteBuffer") == 0) {
                const char subtype = strcmp(cls, "ByteBuffer") ?
                    (const char)FIX2INT(rb_funcall(value, rb_intern("subtype"), 0)) : 2;
                VALUE string_data = rb_funcall(value, rb_intern("to_s"), 0);
                int length = RSTRING_LEN(string_data);
                write_name_and_type(buffer, key, 0x05);
                if (subtype == 2) {
                    const int other_length = length + 4;
                    buffer_write_bytes(buffer, (const char*)&other_length, 4);
                    buffer_write_bytes(buffer, &subtype, 1);
                }
                buffer_write_bytes(buffer, (const char*)&length, 4);
                if (subtype != 2) {
                    buffer_write_bytes(buffer, &subtype, 1);
                }
                buffer_write_bytes(buffer, RSTRING_PTR(string_data), length);
                break;
            }
            if (strcmp(cls, "Mongo::ObjectID") == 0) {
                VALUE as_array = rb_funcall(value, rb_intern("to_a"), 0);
                int i;
                write_name_and_type(buffer, key, 0x07);
                for (i = 0; i < 12; i++) {
                    char byte = (char)FIX2INT(RARRAY_PTR(as_array)[i]);
                    buffer_write_bytes(buffer, &byte, 1);
                }
                break;
            }
            if (strcmp(cls, "Mongo::DBRef") == 0) {
                int start_position, length_location, obj_length;
                VALUE ns, oid;
                write_name_and_type(buffer, key, 0x03);

                start_position = buffer->position;

                // save space for length
                length_location = buffer_save_bytes(buffer, 4);

                ns = rb_funcall(value, rb_intern("namespace"), 0);
                write_element(rb_str_new2("$ref"), ns, pack_extra(buffer, Qfalse));
                oid = rb_funcall(value, rb_intern("object_id"), 0);
                write_element(rb_str_new2("$id"), oid, pack_extra(buffer, Qfalse));

                // write null byte and fill in length
                buffer_write_bytes(buffer, &zero, 1);
                obj_length = buffer->position - start_position;
                memcpy(buffer->buffer + length_location, &obj_length, 4);
                break;
            }
            if (strcmp(cls, "Mongo::Undefined") == 0) {
                write_name_and_type(buffer, key, 0x06);
                break;
            }
        }
    case T_DATA:
        {
            // TODO again, is this really the only way to do this?
            const char* cls = rb_class2name(RBASIC(value)->klass);
            if (strcmp(cls, "Time") == 0) {
                double t = NUM2DBL(rb_funcall(value, rb_intern("to_f"), 0));
                long long time_since_epoch = (long long)round(t * 1000);
                write_name_and_type(buffer, key, 0x09);
                buffer_write_bytes(buffer, (const char*)&time_since_epoch, 8);
                break;
            }
        }
    case T_REGEXP:
        {
            int length = RREGEXP_SRC_LEN(value);
            char* pattern = (char*)RREGEXP_SRC_PTR(value);
            long flags = RREGEXP(value)->ptr->options;
            VALUE has_extra;

            write_name_and_type(buffer, key, 0x0B);

            buffer_write_bytes(buffer, pattern, length);
            buffer_write_bytes(buffer, &zero, 1);

            if (flags & IGNORECASE) {
                char ignorecase = 'i';
                buffer_write_bytes(buffer, &ignorecase, 1);
            }
            if (flags & MULTILINE) {
                char multiline = 'm';
                buffer_write_bytes(buffer, &multiline, 1);
            }
            if (flags & EXTENDED) {
                char extended = 'x';
                buffer_write_bytes(buffer, &extended, 1);
            }

            has_extra = rb_funcall(value, rb_intern("respond_to?"), 1, rb_str_new2("extra_options_str"));
            if (TYPE(has_extra) == T_TRUE) {
                VALUE extra = rb_funcall(value, rb_intern("extra_options_str"), 0);
                int old_position = buffer->position;
                buffer_write_bytes(buffer, RSTRING_PTR(extra), RSTRING_LEN(extra));
                qsort(buffer->buffer + old_position, RSTRING_LEN(extra), sizeof(char), cmp_char);
            }
            buffer_write_bytes(buffer, &zero, 1);

            break;
        }
    default:
        {
            rb_raise(rb_eTypeError, "no c encoder for this type yet (%d)", TYPE(value));
            break;
        }
    }
    return ST_CONTINUE;
}
static PyObject*
_cbson_do_batched_write_command(PyObject* self, PyObject* args) {
    struct module_state *state = GETSTATE(self);

    long max_bson_size;
    long max_cmd_size;
    long max_write_batch_size;
    long idx_offset = 0;
    int idx = 0;
    int cmd_len_loc;
    int lst_len_loc;
    int ns_len;
    int ordered;
    char *ns = NULL;
    PyObject* max_bson_size_obj;
    PyObject* max_write_batch_size_obj;
    PyObject* command;
    PyObject* doc;
    PyObject* docs;
    PyObject* ctx;
    PyObject* iterator;
    PyObject* result;
    PyObject* results;
    PyObject* to_publish = NULL;
    unsigned char op;
    unsigned char check_keys;
    codec_options_t options;
    unsigned char empty = 1;
    unsigned char errors = 0;
    buffer_t buffer;

    if (!PyArg_ParseTuple(args, "et#bOObO&O", "utf-8",
                          &ns, &ns_len, &op, &command, &docs, &check_keys,
                          convert_codec_options, &options,
                          &ctx)) {
        return NULL;
    }

    max_bson_size_obj = PyObject_GetAttrString(ctx, "max_bson_size");
#if PY_MAJOR_VERSION >= 3
    max_bson_size = PyLong_AsLong(max_bson_size_obj);
#else
    max_bson_size = PyInt_AsLong(max_bson_size_obj);
#endif
    Py_XDECREF(max_bson_size_obj);
    if (max_bson_size == -1) {
        destroy_codec_options(&options);
        PyMem_Free(ns);
        return NULL;
    }
    /*
     * Max BSON object size + 16k - 2 bytes for ending NUL bytes
     * XXX: This should come from the server - SERVER-10643
     */
    max_cmd_size = max_bson_size + 16382;

    max_write_batch_size_obj = PyObject_GetAttrString(ctx, "max_write_batch_size");
#if PY_MAJOR_VERSION >= 3
    max_write_batch_size = PyLong_AsLong(max_write_batch_size_obj);
#else
    max_write_batch_size = PyInt_AsLong(max_write_batch_size_obj);
#endif
    Py_XDECREF(max_write_batch_size_obj);
    if (max_write_batch_size == -1) {
        destroy_codec_options(&options);
        PyMem_Free(ns);
        return NULL;
    }

    /* Default to True */
    ordered = !((PyDict_GetItemString(command, "ordered")) == Py_False);

    if (!(results = PyList_New(0))) {
        destroy_codec_options(&options);
        PyMem_Free(ns);
        return NULL;
    }

    if (!(to_publish = PyList_New(0))) {
        destroy_codec_options(&options);
        PyMem_Free(ns);
        Py_DECREF(results);
        return NULL;
    }

    if (!(buffer = _command_buffer_new(ns, ns_len))) {
        destroy_codec_options(&options);
        PyMem_Free(ns);
        Py_DECREF(results);
        Py_DECREF(to_publish);
        return NULL;
    }

    PyMem_Free(ns);

    /* Position of command document length */
    cmd_len_loc = buffer_get_position(buffer);
    if (!write_dict(state->_cbson, buffer, command, 0,
                    &options, 0)) {
        goto cmdfail;
    }

    /* Write type byte for array */
    *(buffer_get_buffer(buffer) + (buffer_get_position(buffer) - 1)) = 0x4;

    switch (op) {
    case _INSERT:
        {
            if (!buffer_write_bytes(buffer, "documents\x00", 10))
                goto cmdfail;
            break;
        }
    case _UPDATE:
        {
            /* MongoDB does key validation for update. */
            check_keys = 0;
            if (!buffer_write_bytes(buffer, "updates\x00", 8))
                goto cmdfail;
            break;
        }
    case _DELETE:
        {
            /* Never check keys in a delete command. */
            check_keys = 0;
            if (!buffer_write_bytes(buffer, "deletes\x00", 8))
                goto cmdfail;
            break;
        }
    default:
        {
            PyObject* InvalidOperation = _error("InvalidOperation");
            if (InvalidOperation) {
                PyErr_SetString(InvalidOperation, "Unknown command");
                Py_DECREF(InvalidOperation);
            }
            goto cmdfail;
        }
    }

    /* Save space for list document */
    lst_len_loc = buffer_save_space(buffer, 4);
    if (lst_len_loc == -1) {
        PyErr_NoMemory();
        goto cmdfail;
    }

    iterator = PyObject_GetIter(docs);
    if (iterator == NULL) {
        PyObject* InvalidOperation = _error("InvalidOperation");
        if (InvalidOperation) {
            PyErr_SetString(InvalidOperation, "input is not iterable");
            Py_DECREF(InvalidOperation);
        }
        goto cmdfail;
    }
    while ((doc = PyIter_Next(iterator)) != NULL) {
        int sub_doc_begin = buffer_get_position(buffer);
        int cur_doc_begin;
        int cur_size;
        int enough_data = 0;
        int enough_documents = 0;
        char key[16];
        empty = 0;
        INT2STRING(key, idx);
        if (!buffer_write_bytes(buffer, "\x03", 1) ||
            !buffer_write_bytes(buffer, key, (int)strlen(key) + 1)) {
            goto cmditerfail;
        }
        cur_doc_begin = buffer_get_position(buffer);
        if (!write_dict(state->_cbson, buffer, doc,
                        check_keys, &options, 1)) {
            goto cmditerfail;
        }

        /* We have enough data, maybe send this batch. */
        enough_data = (buffer_get_position(buffer) > max_cmd_size);
        enough_documents = (idx >= max_write_batch_size);
        if (enough_data || enough_documents) {
            buffer_t new_buffer;
            cur_size = buffer_get_position(buffer) - cur_doc_begin;

            /* This single document is too large for the command. */
            if (!idx) {
                if (op == _INSERT) {
                    _set_document_too_large(cur_size, max_bson_size);
                } else {
                    PyObject* DocumentTooLarge = _error("DocumentTooLarge");
                    if (DocumentTooLarge) {
                        /*
                         * There's nothing intelligent we can say
                         * about size for update and remove.
                         */
                        PyErr_SetString(DocumentTooLarge,
                                        "command document too large");
                        Py_DECREF(DocumentTooLarge);
                    }
                }
                goto cmditerfail;
            }

            if (!(new_buffer = buffer_new())) {
                PyErr_NoMemory();
                goto cmditerfail;
            }
            /* New buffer including the current overflow document */
            if (!buffer_write_bytes(new_buffer,
                (const char*)buffer_get_buffer(buffer), lst_len_loc + 5) ||
                !buffer_write_bytes(new_buffer, "0\x00", 2) ||
                !buffer_write_bytes(new_buffer,
                (const char*)buffer_get_buffer(buffer) + cur_doc_begin, cur_size)) {
                buffer_free(new_buffer);
                goto cmditerfail;
            }
            /*
             * Roll the existing buffer back to the beginning
             * of the last document encoded.
             */
            buffer_update_position(buffer, sub_doc_begin);

            if (!buffer_write_bytes(buffer, "\x00\x00", 2)) {
                buffer_free(new_buffer);
                goto cmditerfail;
            }

            result = _send_write_command(ctx, buffer, lst_len_loc,
                                         cmd_len_loc, &errors, to_publish);

            buffer_free(buffer);
            buffer = new_buffer;

            if (!result)
                goto cmditerfail;

#if PY_MAJOR_VERSION >= 3
            result = Py_BuildValue("NN",
                                   PyLong_FromLong(idx_offset), result);
#else
            result = Py_BuildValue("NN",
                                   PyInt_FromLong(idx_offset), result);
#endif
            if (!result)
                goto cmditerfail;

            if (PyList_Append(results, result) < 0) {
                Py_DECREF(result);
                goto cmditerfail;
            }
            Py_DECREF(result);

            if (errors && ordered) {
                destroy_codec_options(&options);
                Py_DECREF(iterator);
                buffer_free(buffer);
                return results;
            }
            idx_offset += idx;
            idx = 0;
            Py_DECREF(to_publish);
            if (!(to_publish = PyList_New(0))) {
                goto cmditerfail;
            }
        }
        if (PyList_Append(to_publish, doc) < 0) {
            goto cmditerfail;
        }
        Py_CLEAR(doc);
        idx += 1;
    }
    Py_DECREF(iterator);

    if (PyErr_Occurred()) {
        goto cmdfail;
    }

    if (empty) {
        PyObject* InvalidOperation = _error("InvalidOperation");
        if (InvalidOperation) {
            PyErr_SetString(InvalidOperation, "cannot do an empty bulk write");
            Py_DECREF(InvalidOperation);
        }
        goto cmdfail;
    }

    if (!buffer_write_bytes(buffer, "\x00\x00", 2))
        goto cmdfail;

    result = _send_write_command(ctx, buffer, lst_len_loc,
                                 cmd_len_loc, &errors, to_publish);
    if (!result)
        goto cmdfail;

#if PY_MAJOR_VERSION >= 3
    result = Py_BuildValue("NN", PyLong_FromLong(idx_offset), result);
#else
    result = Py_BuildValue("NN", PyInt_FromLong(idx_offset), result);
#endif
    if (!result)
        goto cmdfail;

    buffer_free(buffer);

    if (PyList_Append(results, result) < 0) {
        Py_DECREF(result);
        goto cmdfail;
    }
    Py_DECREF(result);
    Py_DECREF(to_publish);
    destroy_codec_options(&options);
    return results;

cmditerfail:
    Py_XDECREF(doc);
    Py_DECREF(iterator);
cmdfail:
    destroy_codec_options(&options);
    Py_DECREF(results);
    Py_XDECREF(to_publish);
    buffer_free(buffer);
    return NULL;
}