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use std::{self, fs, str};
use std::ffi::{CStr, CString};
use std::path::PathBuf;
use fs_extra::dir::get_dir_content;
use libc::c_char;
use crate::{api, errors, InvocationArg};
pub fn to_rust_string(pointer: *const c_char) -> String {
let slice = unsafe { CStr::from_ptr(pointer).to_bytes() };
str::from_utf8(slice).unwrap().to_string()
}
pub fn to_java_string(string: &str) -> *mut c_char {
let cs = CString::new(string.as_bytes()).unwrap();
cs.into_raw()
}
#[cfg(not(target_os = "windows"))]
pub fn classpath_sep() -> &'static str {
":"
}
#[cfg(target_os = "windows")]
pub fn classpath_sep() -> &'static str {
";"
}
pub fn java_library_path() -> errors::Result<String> {
let default = format!("-Djava.library.path={}", deps_dir()?);
if cfg!(windows) {
Ok(default)
} else {
Ok(format!("{}:/usr/lib:/lib", default))
}
}
pub(crate) fn deps_dir() -> errors::Result<String> {
let mut pb = jassets_path()?;
pb.pop();
pb.push("deps");
Ok(pb
.to_str()
.unwrap_or("./deps/").to_owned())
}
pub(crate) fn jassets_path() -> errors::Result<PathBuf> {
let pb_opt = {
let guard = api::JASSETS_PATH.lock()?;
guard.clone()
};
match pb_opt {
Some(pb) => Ok(pb),
None => default_jassets_path(),
}
}
pub(crate) fn default_jassets_path() -> errors::Result<PathBuf> {
let mut jassets_path = std::env::current_exe()?;
let mut tmp_vec = Vec::new();
while tmp_vec.is_empty() {
jassets_path.pop();
tmp_vec = get_dir_content(&jassets_path)?.directories.into_iter().filter(|path| path.ends_with("jassets")).collect();
}
jassets_path.push("jassets");
Ok(jassets_path)
}
pub(crate) fn find_j4rs_dynamic_libraries_names() -> errors::Result<Vec<String>> {
let entries: Vec<String> = find_j4rs_dynamic_libraries_dir_entries()?.iter()
.map(|entry| entry
.file_name()
.to_str()
.unwrap()
.to_owned())
.collect();
Ok(entries)
}
pub(crate) fn find_j4rs_dynamic_libraries_paths() -> errors::Result<Vec<String>> {
let entries: Vec<String> = find_j4rs_dynamic_libraries_dir_entries()?.iter()
.map(|entry| entry
.path()
.to_str()
.unwrap()
.to_owned())
.collect();
Ok(entries)
}
fn find_j4rs_dynamic_libraries_dir_entries() -> errors::Result<Vec<fs::DirEntry>> {
let v: Vec<fs::DirEntry> = fs::read_dir(deps_dir()?)?
.filter(|entry| {
entry.is_ok()
})
.filter(|entry| {
let entry = entry.as_ref().unwrap();
let file_name = entry.file_name();
let file_name = file_name.to_str().unwrap();
file_name.contains("j4rs") && (
file_name.contains(".so") ||
file_name.contains(".dll") ||
file_name.contains(".dylib"))
})
.map(|entry| entry.unwrap())
.collect();
Ok(v)
}
pub(crate) fn primitive_of(inv_arg: &InvocationArg) -> Option<String> {
match get_class_name(inv_arg) {
"java.lang.Boolean" => Some("bool".to_string()),
"java.lang.Byte" => Some("byte".to_string()),
"java.lang.Short" => Some("short".to_string()),
"java.lang.Integer" => Some("int".to_string()),
"java.lang.Long" => Some("long".to_string()),
"java.lang.Float" => Some("float".to_string()),
"java.lang.Double" => Some("double".to_string()),
"java.lang.Character" => Some("char".to_string()),
"void" => Some("void".to_string()),
_ => None,
}
}
pub(crate) fn get_class_name(inv_arg: &InvocationArg) -> &str {
let class_name = match inv_arg {
&InvocationArg::Java { instance: _, ref class_name, arg_from: _ } => class_name,
&InvocationArg::Rust { json: _, ref class_name, arg_from: _ } => class_name,
};
class_name.as_ref()
}
#[cfg(test)]
mod utils_unit_tests {
use super::*;
#[test]
fn get_class_name_test() {
assert!(get_class_name(&InvocationArg::from(false)) == "java.lang.Boolean");
}
#[test]
fn primitive_of_test() {
assert!(primitive_of(&InvocationArg::from(false)) == Some("bool".to_string()));
assert!(primitive_of(&InvocationArg::from(1_i8)) == Some("byte".to_string()));
assert!(primitive_of(&InvocationArg::from(1_i16)) == Some("short".to_string()));
assert!(primitive_of(&InvocationArg::from(1_32)) == Some("int".to_string()));
assert!(primitive_of(&InvocationArg::from(1_i64)) == Some("long".to_string()));
assert!(primitive_of(&InvocationArg::from(0.1_f32)) == Some("float".to_string()));
assert!(primitive_of(&InvocationArg::from(0.1_f64)) == Some("double".to_string()));
assert!(primitive_of(&InvocationArg::from('c')) == Some("char".to_string()));
assert!(primitive_of(&InvocationArg::from(())) == Some("void".to_string()));
}
}