From 6d9d80362f9932bbc87e162b8ef7df06c73e27e1 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 | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 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..d4222b5 --- /dev/null +++ b/src/io/read.c @@ -0,0 +1,31 @@ +/* + * nanowasm, a tiny WebAssembly/Wasm interpreter + * Copyright (C) 2023-2025 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 + +enum nw_state nwp_io_read(const struct nw_io_cfg *const cfg, + struct nw_sm_io *const io, void *const user) +{ + void *const buf = (unsigned char *)io->buf + io->read; + const size_t rem = io->n - io->read; + const int n = cfg->read(buf, rem, user); + + if (n < 0 || (!n && cfg->eof(user))) + return NW_FATAL; + + if ((io->read += n) >= io->n) + { + io->read = 0; + return NW_OK; + } + + return NW_AGAIN; +} -- cgit v1.2.3