int args(box_function_ctx_t *ctx, const char *args, const char *args_end) { uint32_t arg_count = mp_decode_array(&args); if (arg_count < 1) { return box_error_set(__FILE__, __LINE__, ER_PROC_C, "%s", "invalid argument count"); } if (mp_typeof(*args) != MP_UINT) { return box_error_set(__FILE__, __LINE__, ER_PROC_C, "%s", "first tuple field must be uint"); } uint32_t num = mp_decode_uint(&args); char tuple_buf[512]; char *d = tuple_buf; d = mp_encode_array(d, 2); d = mp_encode_uint(d, num); d = mp_encode_str(d, "hello", strlen("hello")); assert(d <= tuple_buf + sizeof(tuple_buf)); box_tuple_format_t *fmt = box_tuple_format_default(); box_tuple_t *tuple = box_tuple_new(fmt, tuple_buf, d); if (tuple == NULL) return -1; return box_return_tuple(ctx, tuple); }
int test_reload_fail(box_function_ctx_t *ctx, const char *args, const char *args_end) { char tuple_buf[64]; char *tuple_end = tuple_buf; tuple_end = mp_encode_array(tuple_end, 1); tuple_end = mp_encode_uint(tuple_end, 2); struct tuple *tuple = box_tuple_new(box_tuple_format_default(), tuple_buf, tuple_end); return box_return_tuple(ctx, tuple); }
static int lbox_tuple_new(lua_State *L) { int argc = lua_gettop(L); if (argc < 1) { lua_newtable(L); /* create an empty tuple */ ++argc; } /* * Use backward-compatible parameters format: * box.tuple.new(1, 2, 3) (idx == 0), or the new one: * box.tuple.new({1, 2, 3}) (idx == 1). */ int idx = argc == 1 && (lua_istable(L, 1) || luaT_istuple(L, 1)); box_tuple_format_t *fmt = box_tuple_format_default(); struct tuple *tuple = luaT_tuple_new(L, idx, fmt); if (tuple == NULL) return luaT_error(L); /* box_tuple_new() doesn't leak on exception, see public API doc */ luaT_pushtuple(L, tuple); return 1; }
/** * Tuple transforming function. * * Remove the fields designated by 'offset' and 'len' from an tuple, * and replace them with the elements of supplied data fields, * if any. * * Function returns newly allocated tuple. * It does not change any parent tuple data. */ static int lbox_tuple_transform(struct lua_State *L) { struct tuple *tuple = lua_checktuple(L, 1); int argc = lua_gettop(L); if (argc < 3) luaL_error(L, "tuple.transform(): bad arguments"); lua_Integer offset = lua_tointeger(L, 2); /* Can be negative and can be > INT_MAX */ lua_Integer len = lua_tointeger(L, 3); lua_Integer field_count = box_tuple_field_count(tuple); /* validate offset and len */ if (offset == 0) { luaL_error(L, "tuple.transform(): offset is out of bound"); } else if (offset < 0) { if (-offset > field_count) luaL_error(L, "tuple.transform(): offset is out of bound"); offset += field_count + 1; } else if (offset > field_count) { offset = field_count + 1; } if (len < 0) luaL_error(L, "tuple.transform(): len is negative"); if (len > field_count + 1 - offset) len = field_count + 1 - offset; assert(offset + len <= field_count + 1); /* * Calculate the number of operations and length of UPDATE expression */ uint32_t op_cnt = 0; if (offset < field_count + 1 && len > 0) op_cnt++; if (argc > 3) op_cnt += argc - 3; if (op_cnt == 0) { /* tuple_update() does not accept an empty operation list. */ luaT_pushtuple(L, tuple); return 1; } struct ibuf *buf = tarantool_lua_ibuf; ibuf_reset(buf); struct mpstream stream; mpstream_init(&stream, buf, ibuf_reserve_cb, ibuf_alloc_cb, luamp_error, L); /* * Prepare UPDATE expression */ mpstream_encode_array(&stream, op_cnt); if (len > 0) { mpstream_encode_array(&stream, 3); mpstream_encode_str(&stream, "#"); mpstream_encode_uint(&stream, offset); mpstream_encode_uint(&stream, len); } for (int i = argc ; i > 3; i--) { mpstream_encode_array(&stream, 3); mpstream_encode_str(&stream, "!"); mpstream_encode_uint(&stream, offset); luamp_encode(L, luaL_msgpack_default, &stream, i); } mpstream_flush(&stream); uint32_t new_size = 0, bsize; const char *old_data = tuple_data_range(tuple, &bsize); struct region *region = &fiber()->gc; size_t used = region_used(region); struct tuple *new_tuple = NULL; /* * Can't use box_tuple_update() since transform must reset * the tuple format to default. The new tuple most likely * won't coerce into the original space format, so we have * to use the default one with no restrictions on field * count or types. */ const char *new_data = tuple_update_execute(region_aligned_alloc_cb, region, buf->buf, buf->buf + ibuf_used(buf), old_data, old_data + bsize, &new_size, 1, NULL); if (new_data != NULL) new_tuple = tuple_new(box_tuple_format_default(), new_data, new_data + new_size); region_truncate(region, used); if (new_tuple == NULL) luaT_error(L); luaT_pushtuple(L, new_tuple); ibuf_reset(buf); return 1; }