⭐ initial commit
_
commit
c6171db924
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@ -0,0 +1,2 @@
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/target
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/wasm_guest/target
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File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,9 @@
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[package]
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name = "wasm_test"
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version = "0.1.0"
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edition = "2021"
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license = "Apache-2.0"
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[dependencies]
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anyhow = "1.0.65"
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wasmtime = "1.0.0"
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@ -0,0 +1,12 @@
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Example code for passing strings into wasm functions with wasmtime.
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```bash
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cargo install wasm-pack
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cd wasm_guest
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wasm-pack build
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cd ..
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cargo run
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```
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This repo is Apache-2.0 to match the wasmtime license, unlike my other repos.
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@ -0,0 +1,31 @@
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use anyhow::Result;
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use wasmtime::*;
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fn main() -> Result<()> {
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let engine = Engine::default ();
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let module = Module::from_file (&engine, "wasm_guest/pkg/wasm_guest_bg.wasm")?;
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let linker = Linker::new (&engine);
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let mut store = Store::new (&engine, ());
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let instance = linker.instantiate (&mut store, &module)?;
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{
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let malloc = instance.get_typed_func::<(i32), (i32), _> (&mut store, "our_malloc")?;
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let parse_string = instance.get_typed_func::<(i32, i32), (f64), _> (&mut store, "parse_string")?;
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let memory = instance.get_memory (&mut store, "memory").unwrap ();
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let s = "{\"bogus\": 42}";
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let ptr = malloc.call (&mut store, (s.len () as i32))?;
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dbg! (ptr);
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memory.write (&mut store, ptr as usize, s.as_bytes ());
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dbg! (parse_string.call (&mut store, (ptr, s.len () as i32))?);
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}
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Ok(())
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}
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@ -0,0 +1,156 @@
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "bumpalo"
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version = "3.11.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c1ad822118d20d2c234f427000d5acc36eabe1e29a348c89b63dd60b13f28e5d"
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[[package]]
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name = "cfg-if"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
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[[package]]
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name = "itoa"
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version = "1.0.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "6c8af84674fe1f223a982c933a0ee1086ac4d4052aa0fb8060c12c6ad838e754"
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[[package]]
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name = "log"
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version = "0.4.17"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
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dependencies = [
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"cfg-if",
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]
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[[package]]
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name = "once_cell"
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version = "1.15.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e82dad04139b71a90c080c8463fe0dc7902db5192d939bd0950f074d014339e1"
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[[package]]
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name = "proc-macro2"
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version = "1.0.43"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0a2ca2c61bc9f3d74d2886294ab7b9853abd9c1ad903a3ac7815c58989bb7bab"
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dependencies = [
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"unicode-ident",
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]
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[[package]]
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name = "quote"
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version = "1.0.21"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
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dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "ryu"
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version = "1.0.11"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
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[[package]]
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name = "serde"
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version = "1.0.144"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0f747710de3dcd43b88c9168773254e809d8ddbdf9653b84e2554ab219f17860"
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[[package]]
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name = "serde_json"
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version = "1.0.85"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e55a28e3aaef9d5ce0506d0a14dbba8054ddc7e499ef522dd8b26859ec9d4a44"
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dependencies = [
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"itoa",
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"ryu",
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"serde",
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]
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[[package]]
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name = "syn"
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version = "1.0.100"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "52205623b1b0f064a4e71182c3b18ae902267282930c6d5462c91b859668426e"
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dependencies = [
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"proc-macro2",
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"quote",
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"unicode-ident",
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]
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[[package]]
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name = "unicode-ident"
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version = "1.0.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "dcc811dc4066ac62f84f11307873c4850cb653bfa9b1719cee2bd2204a4bc5dd"
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||||
|
||||
[[package]]
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name = "wasm-bindgen"
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version = "0.2.83"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "eaf9f5aceeec8be17c128b2e93e031fb8a4d469bb9c4ae2d7dc1888b26887268"
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dependencies = [
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"cfg-if",
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"wasm-bindgen-macro",
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]
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[[package]]
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name = "wasm-bindgen-backend"
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version = "0.2.83"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4c8ffb332579b0557b52d268b91feab8df3615f265d5270fec2a8c95b17c1142"
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dependencies = [
|
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"bumpalo",
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"log",
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"once_cell",
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"proc-macro2",
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"quote",
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"syn",
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"wasm-bindgen-shared",
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]
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[[package]]
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name = "wasm-bindgen-macro"
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version = "0.2.83"
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||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "052be0f94026e6cbc75cdefc9bae13fd6052cdcaf532fa6c45e7ae33a1e6c810"
|
||||
dependencies = [
|
||||
"quote",
|
||||
"wasm-bindgen-macro-support",
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||||
]
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[[package]]
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name = "wasm-bindgen-macro-support"
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version = "0.2.83"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "07bc0c051dc5f23e307b13285f9d75df86bfdf816c5721e573dec1f9b8aa193c"
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||||
dependencies = [
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||||
"proc-macro2",
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"quote",
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"syn",
|
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"wasm-bindgen-backend",
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||||
"wasm-bindgen-shared",
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||||
]
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||||
|
||||
[[package]]
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name = "wasm-bindgen-shared"
|
||||
version = "0.2.83"
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||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "1c38c045535d93ec4f0b4defec448e4291638ee608530863b1e2ba115d4fff7f"
|
||||
|
||||
[[package]]
|
||||
name = "wasm_guest"
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||||
version = "0.1.0"
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||||
dependencies = [
|
||||
"serde_json",
|
||||
"wasm-bindgen",
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||||
]
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@ -0,0 +1,12 @@
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|||
[package]
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||||
name = "wasm_guest"
|
||||
version = "0.1.0"
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||||
edition = "2021"
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||||
license = "Apache-2.0"
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[lib]
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crate-type = ["cdylib"]
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|
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[dependencies]
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serde_json = "1.0.85"
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wasm-bindgen = "0.2.83"
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|
|
@ -0,0 +1,19 @@
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|||
use wasm_bindgen::prelude::*;
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|
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#[wasm_bindgen]
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||||
pub fn our_malloc (len: i32) -> i32 {
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||||
let mut v: Vec <u8> = Vec::with_capacity (len as usize);
|
||||
let ptr = v.as_mut_ptr ();
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||||
std::mem::forget (v);
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ptr as i32
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}
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|
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#[wasm_bindgen]
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||||
pub fn parse_string (s: &str) -> f64 {
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||||
let val: serde_json::Value = serde_json::from_str (s).unwrap ();
|
||||
let val = val.get ("bogus").unwrap ();
|
||||
match val {
|
||||
serde_json::Value::Number (x) => x.as_f64 ().unwrap (),
|
||||
_ => panic! ("bogus isn't a number"),
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue