From 144b7fe1415ff97497fa4ea3b95e8dd6b95d069e Mon Sep 17 00:00:00 2001 From: Xavier Del Campo Romero Date: Sat, 7 Sep 2024 00:04:38 +0200 Subject: First commit --- src/io/read.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 src/io/read.c (limited to 'src/io/read.c') diff --git a/src/io/read.c b/src/io/read.c new file mode 100644 index 0000000..2d64257 --- /dev/null +++ b/src/io/read.c @@ -0,0 +1,29 @@ +/* + * nanowasm, a tiny WebAssembly/Wasm interpreter + * Copyright (C) 2023-2024 Xavier Del Campo Romero + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at https://mozilla.org/MPL/2.0/. + */ + +#include +#include +#include +#include + +enum nw_state nwp_io_read(const struct nw_io_cfg *const cfg, + struct nw_sm_io *const io) +{ + void *const buf = (uint8_t *)io->buf + io->read; + const size_t rem = io->n - io->read; + const int n = cfg->read(buf, rem, cfg->user); + + if (n < 0) + return NW_FATAL; + + if ((io->read += n) >= io->n) + return NW_OK; + + return NW_AGAIN; +} -- cgit v1.2.3