mirror of
https://github.com/denoland/rusty_v8.git
synced 2024-12-23 15:50:11 -05:00
Basic Local<String> support (#27)
This commit is contained in:
parent
cec2467245
commit
d91f0269fa
13 changed files with 209 additions and 6 deletions
3
BUILD.gn
3
BUILD.gn
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@ -10,10 +10,11 @@ v8_static_library("rusty_v8") {
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"src/inspector/client.cc",
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"src/isolate.cc",
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"src/locker.cc",
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"src/number.cc",
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"src/platform/mod.cc",
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"src/platform/task.cc",
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"src/string.cc",
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"src/string_buffer.cc",
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"src/value.cc",
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]
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deps = [
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":v8",
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7
Cargo.lock
generated
7
Cargo.lock
generated
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@ -20,6 +20,11 @@ dependencies = [
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"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "bitflags"
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version = "1.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "cargo_gn"
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version = "0.0.13"
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@ -62,6 +67,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "rusty_v8"
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version = "0.0.7"
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dependencies = [
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"bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"cargo_gn 0.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -80,6 +86,7 @@ dependencies = [
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[metadata]
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"checksum backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)" = "924c76597f0d9ca25d762c25a4d369d51267536465dc5064bdf0eb073ed477ea"
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"checksum backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)" = "5d6575f128516de27e3ce99689419835fce9643a9b215a14d2b5b685be018491"
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"checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
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"checksum cargo_gn 0.0.13 (registry+https://github.com/rust-lang/crates.io-index)" = "0a679c108cad6ee19a25f4dbaf1b4e1fadf303e707fa1e2d060b4c169faeb836"
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"checksum cc 1.0.45 (registry+https://github.com/rust-lang/crates.io-index)" = "4fc9a35e1f4290eb9e5fc54ba6cf40671ed2a2514c3eeb2b2a908dda2ea5a1be"
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"checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
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@ -50,6 +50,7 @@ exclude = [
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[dependencies]
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lazy_static = "1.4.0"
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libc = "0.2.65"
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bitflags = "1.2.1"
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[build-dependencies]
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cargo_gn = "0.0.13"
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@ -55,4 +55,4 @@ void v8_inspector__V8Inspector__Channel__flushProtocolNotifications(
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V8Inspector::Channel& self) {
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self.flushProtocolNotifications();
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}
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} // extern "C"
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} // extern "C"
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@ -51,4 +51,4 @@ void v8_inspector__V8InspectorClient__runIfWaitingForDebugger(
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int contextGroupId) {
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self.runIfWaitingForDebugger(contextGroupId);
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}
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} // extern "C"
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} // extern "C"
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@ -5,6 +5,8 @@
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#![allow(clippy::new_without_default)]
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#![allow(dead_code)]
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#[macro_use]
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extern crate bitflags;
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#[macro_use]
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extern crate lazy_static;
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extern crate libc;
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@ -14,13 +16,14 @@ mod inspector;
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mod isolate;
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mod local;
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mod locker;
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mod number;
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mod string_buffer;
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mod string_view;
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mod support;
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mod value;
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pub mod array_buffer;
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pub mod platform;
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pub mod string;
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// This module is intentionally named "V8" rather than "v8" to match the
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// C++ namespace "v8::V8".
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#[allow(non_snake_case)]
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@ -30,6 +33,7 @@ pub use handle_scope::HandleScope;
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pub use isolate::Isolate;
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pub use local::Local;
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pub use locker::Locker;
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pub use number::{Integer, Number};
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pub use string::String;
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pub use string_buffer::StringBuffer;
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pub use string_view::StringView;
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pub use value::{Integer, Number};
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29
src/string.cc
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29
src/string.cc
Normal file
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@ -0,0 +1,29 @@
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#include <cstdint>
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#include "support.h"
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#include "v8/include/v8.h"
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using namespace v8;
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using namespace support;
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extern "C" {
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String* v8__String__NewFromUtf8(Isolate* isolate,
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const char* data,
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NewStringType type,
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int length) {
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return maybe_local_ptr(String::NewFromUtf8(isolate, data, type, length));
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}
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int v8__String__Utf8Length(const String& self, Isolate* isolate) {
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return self.Utf8Length(isolate);
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}
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int v8__String__WriteUtf8(const String& self,
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Isolate* isolate,
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char* buffer,
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int length,
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int* nchars_ref,
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int options) {
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return self.WriteUtf8(isolate, buffer, length, nchars_ref, options);
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}
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}
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135
src/string.rs
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135
src/string.rs
Normal file
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@ -0,0 +1,135 @@
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use std::convert::TryInto;
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use std::default::Default;
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use std::mem::forget;
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use std::slice;
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use crate::isolate::CxxIsolate;
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use crate::isolate::LockedIsolate;
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use crate::support::char;
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use crate::support::int;
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use crate::support::Opaque;
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use crate::HandleScope;
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use crate::Local;
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extern "C" {
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fn v8__String__NewFromUtf8(
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isolate: *mut CxxIsolate,
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data: *const char,
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new_type: NewStringType,
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length: int,
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) -> *const String;
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fn v8__String__Utf8Length(this: &String, isolate: *mut CxxIsolate) -> int;
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fn v8__String__WriteUtf8(
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this: &String,
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isolate: *mut CxxIsolate,
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buffer: *mut char,
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length: int,
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nchars_ref: *mut int,
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options: WriteOptions,
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) -> int;
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}
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#[repr(C)]
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pub enum NewStringType {
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Normal,
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Internalized,
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}
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impl Default for NewStringType {
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fn default() -> Self {
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NewStringType::Normal
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}
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}
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bitflags! {
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#[derive(Default)]
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#[repr(transparent)]
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pub struct WriteOptions: int {
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const NO_OPTIONS = 0;
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const HINT_MANY_WRITES_EXPECTED = 1;
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const NO_NULL_TERMINATION = 2;
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const PRESERVE_ONE_BYTE_NULL = 4;
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// Used by WriteUtf8 to replace orphan surrogate code units with the
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// unicode replacement character. Needs to be set to guarantee valid UTF-8
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// output.
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const REPLACE_INVALID_UTF8 = 8;
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}
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}
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#[repr(C)]
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pub struct String(Opaque);
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impl String {
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pub fn new_from_utf8<'sc>(
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scope: &mut HandleScope<'sc>,
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buffer: &[u8],
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new_type: NewStringType,
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) -> Option<Local<'sc, String>> {
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unsafe {
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let ptr = v8__String__NewFromUtf8(
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scope.cxx_isolate(),
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buffer.as_ptr() as *const char,
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new_type,
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buffer.len().try_into().ok()?,
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);
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Local::from_raw(ptr)
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}
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}
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pub fn utf8_length(&self, isolate: &mut impl LockedIsolate) -> usize {
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unsafe { v8__String__Utf8Length(self, isolate.cxx_isolate()) as usize }
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}
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pub fn write_utf8(
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&self,
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isolate: &mut impl LockedIsolate,
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buffer: &mut [u8],
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nchars_ref: Option<&mut usize>,
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options: WriteOptions,
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) -> usize {
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let mut nchars_ref_int: int = 0;
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let bytes = unsafe {
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v8__String__WriteUtf8(
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self,
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isolate.cxx_isolate(),
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buffer.as_mut_ptr() as *mut char,
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buffer.len().try_into().unwrap_or(int::max_value()),
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&mut nchars_ref_int,
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options,
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)
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};
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if let Some(r) = nchars_ref {
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*r = nchars_ref_int as usize;
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}
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bytes as usize
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}
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// Convenience function not present in the original V8 API.
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pub fn new<'sc>(
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scope: &mut HandleScope<'sc>,
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value: &str,
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new_type: NewStringType,
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) -> Option<Local<'sc, String>> {
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Self::new_from_utf8(scope, value.as_ref(), new_type)
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}
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// Convenience function not present in the original V8 API.
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pub fn to_rust_string_lossy(
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&self,
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isolate: &mut impl LockedIsolate,
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) -> std::string::String {
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let capacity = self.utf8_length(isolate);
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let mut string = std::string::String::with_capacity(capacity);
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let data = string.as_mut_ptr();
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forget(string);
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let length = self.write_utf8(
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isolate,
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unsafe { slice::from_raw_parts_mut(data, capacity) },
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None,
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WriteOptions::NO_NULL_TERMINATION | WriteOptions::REPLACE_INVALID_UTF8,
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);
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unsafe { std::string::String::from_raw_parts(data, length, capacity) }
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}
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}
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@ -7,6 +7,8 @@
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#include <type_traits>
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#include <utility>
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#include "v8/include/v8.h"
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// Check assumptions made in binding code.
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// TODO(ry) re-enable the following
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// static_assert(sizeof(bool) == sizeof(uint8_t));
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@ -33,4 +35,9 @@ void construct_in_place(uninit_t<T>& buf, Args... args) {
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}
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} // namespace support
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#endif // SUPPORT_H_
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template <class T>
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inline static T* maybe_local_ptr(v8::MaybeLocal<T> value) {
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return *value.FromMaybe(v8::Local<T>());
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}
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#endif // SUPPORT_H_
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@ -6,6 +6,7 @@ use std::ops::Deref;
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use std::ops::DerefMut;
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use std::ptr::NonNull;
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pub use std::os::raw::c_char as char;
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pub use std::os::raw::c_int as int;
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pub type Opaque = [usize; 0];
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@ -76,6 +76,24 @@ fn handle_scope_numbers() {
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drop(g);
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}
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#[test]
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fn test_string() {
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setup();
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let mut params = v8::Isolate::create_params();
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params.set_array_buffer_allocator(
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v8::array_buffer::Allocator::new_default_allocator(),
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);
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let mut isolate = v8::Isolate::new(params);
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let mut locker = v8::Locker::new(&mut isolate);
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v8::HandleScope::enter(&mut locker, |scope| {
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let reference = "Hello 🦕 world!";
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let local =
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v8::String::new(scope, reference, v8::string::NewStringType::Normal)
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.unwrap();
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assert_eq!(reference, local.to_rust_string_lossy(scope));
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});
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}
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#[test]
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fn isolate_new() {
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let g = setup();
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