javascriptcore-rs-sys 0.4.0

// Generated by gir (https://github.com/gtk-rs/gir @ a97e6087cf6b)
// from gir-files (https://github.com/vhdirk/gir-files @ 5c5c482b7f4a)
// DO NOT EDIT

use javascriptcore_sys::*;
use std::{
  env,
  error::Error,
  ffi::OsString,
  mem::{align_of, size_of},
  path::Path,
  process::Command,
  str,
};
use tempfile::Builder;

static PACKAGES: &[&str] = &["javascriptcoregtk-4.0"];

#[derive(Clone, Debug)]
struct Compiler {
  pub args: Vec<String>,
}

impl Compiler {
  pub fn new() -> Result<Self, Box<dyn Error>> {
    let mut args = get_var("CC", "cc")?;
    args.push("-Wno-deprecated-declarations".to_owned());
    // For _Generic
    args.push("-std=c11".to_owned());
    // For %z support in printf when using MinGW.
    args.push("-D__USE_MINGW_ANSI_STDIO".to_owned());
    args.extend(get_var("CFLAGS", "")?);
    args.extend(get_var("CPPFLAGS", "")?);
    args.extend(pkg_config_cflags(PACKAGES)?);
    Ok(Self { args })
  }

  pub fn compile(&self, src: &Path, out: &Path) -> Result<(), Box<dyn Error>> {
    let mut cmd = self.to_command();
    cmd.arg(src);
    cmd.arg("-o");
    cmd.arg(out);
    let status = cmd.spawn()?.wait()?;
    if !status.success() {
      return Err(format!("compilation command {:?} failed, {}", &cmd, status).into());
    }
    Ok(())
  }

  fn to_command(&self) -> Command {
    let mut cmd = Command::new(&self.args[0]);
    cmd.args(&self.args[1..]);
    cmd
  }
}

fn get_var(name: &str, default: &str) -> Result<Vec<String>, Box<dyn Error>> {
  match env::var(name) {
    Ok(value) => Ok(shell_words::split(&value)?),
    Err(env::VarError::NotPresent) => Ok(shell_words::split(default)?),
    Err(err) => Err(format!("{} {}", name, err).into()),
  }
}

fn pkg_config_cflags(packages: &[&str]) -> Result<Vec<String>, Box<dyn Error>> {
  if packages.is_empty() {
    return Ok(Vec::new());
  }
  let pkg_config = env::var_os("PKG_CONFIG").unwrap_or_else(|| OsString::from("pkg-config"));
  let mut cmd = Command::new(pkg_config);
  cmd.arg("--cflags");
  cmd.args(packages);
  let out = cmd.output()?;
  if !out.status.success() {
    return Err(format!("command {:?} returned {}", &cmd, out.status).into());
  }
  let stdout = str::from_utf8(&out.stdout)?;
  Ok(shell_words::split(stdout.trim())?)
}

#[derive(Copy, Clone, Debug, Eq, PartialEq)]
struct Layout {
  size: usize,
  alignment: usize,
}

#[derive(Copy, Clone, Debug, Default, Eq, PartialEq)]
struct Results {
  /// Number of successfully completed tests.
  passed: usize,
  /// Total number of failed tests (including those that failed to compile).
  failed: usize,
}

impl Results {
  fn record_passed(&mut self) {
    self.passed += 1;
  }
  fn record_failed(&mut self) {
    self.failed += 1;
  }
  fn summary(&self) -> String {
    format!("{} passed; {} failed", self.passed, self.failed)
  }
  fn expect_total_success(&self) {
    if self.failed == 0 {
      println!("OK: {}", self.summary());
    } else {
      panic!("FAILED: {}", self.summary());
    };
  }
}

#[test]
fn cross_validate_constants_with_c() {
  let mut c_constants: Vec<(String, String)> = Vec::new();

  for l in get_c_output("constant").unwrap().lines() {
    let mut words = l.trim().split(';');
    let name = words.next().expect("Failed to parse name").to_owned();
    let value = words
      .next()
      .and_then(|s| s.parse().ok())
      .expect("Failed to parse value");
    c_constants.push((name, value));
  }

  let mut results = Results::default();

  for ((rust_name, rust_value), (c_name, c_value)) in RUST_CONSTANTS.iter().zip(c_constants.iter())
  {
    if rust_name != c_name {
      results.record_failed();
      eprintln!("Name mismatch:\nRust: {:?}\nC:    {:?}", rust_name, c_name,);
      continue;
    }

    if rust_value != c_value {
      results.record_failed();
      eprintln!(
        "Constant value mismatch for {}\nRust: {:?}\nC:    {:?}",
        rust_name, rust_value, &c_value
      );
      continue;
    }

    results.record_passed();
  }

  results.expect_total_success();
}

#[test]
fn cross_validate_layout_with_c() {
  let mut c_layouts = Vec::new();

  for l in get_c_output("layout").unwrap().lines() {
    let mut words = l.trim().split(';');
    let name = words.next().expect("Failed to parse name").to_owned();
    let size = words
      .next()
      .and_then(|s| s.parse().ok())
      .expect("Failed to parse size");
    let alignment = words
      .next()
      .and_then(|s| s.parse().ok())
      .expect("Failed to parse alignment");
    c_layouts.push((name, Layout { size, alignment }));
  }

  let mut results = Results::default();

  for ((rust_name, rust_layout), (c_name, c_layout)) in RUST_LAYOUTS.iter().zip(c_layouts.iter()) {
    if rust_name != c_name {
      results.record_failed();
      eprintln!("Name mismatch:\nRust: {:?}\nC:    {:?}", rust_name, c_name,);
      continue;
    }

    if rust_layout != c_layout {
      results.record_failed();
      eprintln!(
        "Layout mismatch for {}\nRust: {:?}\nC:    {:?}",
        rust_name, rust_layout, &c_layout
      );
      continue;
    }

    results.record_passed();
  }

  results.expect_total_success();
}

fn get_c_output(name: &str) -> Result<String, Box<dyn Error>> {
  let tmpdir = Builder::new().prefix("abi").tempdir()?;
  let exe = tmpdir.path().join(name);
  let c_file = Path::new("tests").join(name).with_extension("c");

  let cc = Compiler::new().expect("configured compiler");
  cc.compile(&c_file, &exe)?;

  let mut abi_cmd = Command::new(exe);
  let output = abi_cmd.output()?;
  if !output.status.success() {
    return Err(format!("command {:?} failed, {:?}", &abi_cmd, &output).into());
  }

  Ok(String::from_utf8(output.stdout)?)
}

const RUST_LAYOUTS: &[(&str, Layout)] = &[
  (
    "JSCCheckSyntaxMode",
    Layout {
      size: size_of::<JSCCheckSyntaxMode>(),
      alignment: align_of::<JSCCheckSyntaxMode>(),
    },
  ),
  (
    "JSCCheckSyntaxResult",
    Layout {
      size: size_of::<JSCCheckSyntaxResult>(),
      alignment: align_of::<JSCCheckSyntaxResult>(),
    },
  ),
  (
    "JSCClassVTable",
    Layout {
      size: size_of::<JSCClassVTable>(),
      alignment: align_of::<JSCClassVTable>(),
    },
  ),
  (
    "JSCContext",
    Layout {
      size: size_of::<JSCContext>(),
      alignment: align_of::<JSCContext>(),
    },
  ),
  (
    "JSCContextClass",
    Layout {
      size: size_of::<JSCContextClass>(),
      alignment: align_of::<JSCContextClass>(),
    },
  ),
  (
    "JSCException",
    Layout {
      size: size_of::<JSCException>(),
      alignment: align_of::<JSCException>(),
    },
  ),
  (
    "JSCExceptionClass",
    Layout {
      size: size_of::<JSCExceptionClass>(),
      alignment: align_of::<JSCExceptionClass>(),
    },
  ),
  (
    "JSCOptionType",
    Layout {
      size: size_of::<JSCOptionType>(),
      alignment: align_of::<JSCOptionType>(),
    },
  ),
  (
    "JSCValue",
    Layout {
      size: size_of::<JSCValue>(),
      alignment: align_of::<JSCValue>(),
    },
  ),
  (
    "JSCValueClass",
    Layout {
      size: size_of::<JSCValueClass>(),
      alignment: align_of::<JSCValueClass>(),
    },
  ),
  (
    "JSCValuePropertyFlags",
    Layout {
      size: size_of::<JSCValuePropertyFlags>(),
      alignment: align_of::<JSCValuePropertyFlags>(),
    },
  ),
  (
    "JSCVirtualMachine",
    Layout {
      size: size_of::<JSCVirtualMachine>(),
      alignment: align_of::<JSCVirtualMachine>(),
    },
  ),
  (
    "JSCVirtualMachineClass",
    Layout {
      size: size_of::<JSCVirtualMachineClass>(),
      alignment: align_of::<JSCVirtualMachineClass>(),
    },
  ),
  (
    "JSCWeakValue",
    Layout {
      size: size_of::<JSCWeakValue>(),
      alignment: align_of::<JSCWeakValue>(),
    },
  ),
  (
    "JSCWeakValueClass",
    Layout {
      size: size_of::<JSCWeakValueClass>(),
      alignment: align_of::<JSCWeakValueClass>(),
    },
  ),
];

const RUST_CONSTANTS: &[(&str, &str)] = &[
  ("(gint) JSC_CHECK_SYNTAX_MODE_MODULE", "1"),
  ("(gint) JSC_CHECK_SYNTAX_MODE_SCRIPT", "0"),
  ("(gint) JSC_CHECK_SYNTAX_RESULT_IRRECOVERABLE_ERROR", "2"),
  ("(gint) JSC_CHECK_SYNTAX_RESULT_OUT_OF_MEMORY_ERROR", "4"),
  ("(gint) JSC_CHECK_SYNTAX_RESULT_RECOVERABLE_ERROR", "1"),
  ("(gint) JSC_CHECK_SYNTAX_RESULT_STACK_OVERFLOW_ERROR", "5"),
  ("(gint) JSC_CHECK_SYNTAX_RESULT_SUCCESS", "0"),
  (
    "(gint) JSC_CHECK_SYNTAX_RESULT_UNTERMINATED_LITERAL_ERROR",
    "3",
  ),
  ("JSC_MAJOR_VERSION", "2"),
  ("JSC_MICRO_VERSION", "1"),
  ("JSC_MINOR_VERSION", "34"),
  ("JSC_OPTIONS_USE_DFG", "useDFGJIT"),
  ("JSC_OPTIONS_USE_FTL", "useFTLJIT"),
  ("JSC_OPTIONS_USE_JIT", "useJIT"),
  ("JSC_OPTIONS_USE_LLINT", "useLLInt"),
  ("(gint) JSC_OPTION_BOOLEAN", "0"),
  ("(gint) JSC_OPTION_DOUBLE", "4"),
  ("(gint) JSC_OPTION_INT", "1"),
  ("(gint) JSC_OPTION_RANGE_STRING", "6"),
  ("(gint) JSC_OPTION_SIZE", "3"),
  ("(gint) JSC_OPTION_STRING", "5"),
  ("(gint) JSC_OPTION_UINT", "2"),
  ("(guint) JSC_VALUE_PROPERTY_CONFIGURABLE", "1"),
  ("(guint) JSC_VALUE_PROPERTY_ENUMERABLE", "2"),
  ("(guint) JSC_VALUE_PROPERTY_WRITABLE", "4"),
];