sander/java.rs
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added modifiers

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This commit is contained in:
Shautvast 2023-09-20 22:48:54 +02:00
parent 724b2f3eaa
commit c2cebaedad
3 changed files with 118 additions and 87 deletions
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2
src/lib.rs
View file

@ -163,7 +163,7 @@ fn read_field(index: &mut usize, bytecode: &Vec<u8>) -> Field {
fn read_method(constant_pool: Rc<Vec<CpEntry>>, index: &mut usize, bytecode: &Vec<u8>) -> Method {
let access_flags = get_u16(bytecode, *index);
let name_index = get_u16(bytecode, *index + 2) as usize;
let descriptor_index = get_u16(bytecode, *index + 4);
let descriptor_index = get_u16(bytecode, *index + 4) as usize;
let attributes_count = get_u16(bytecode, *index + 6);
*index += 8;
let mut attributes = vec![];

39
src/types.rs
View file

@ -1,3 +1,4 @@
use std::borrow::ToOwned;
use std::rc::Rc;
use crate::types::CpEntry::*;
@ -62,16 +63,44 @@ pub struct Method {
pub constant_pool: Rc<Vec<CpEntry>>,
pub access_flags: u16,
pub name_index: usize,
pub descriptor_index: u16,
pub descriptor_index: usize,
pub attributes_count: u16,
pub attributes: Vec<Attribute>,
}
impl Method {
pub fn name(&self) -> &str {
if let Utf8(s) = &self.constant_pool[self.name_index - 1] {
return &s;
pub fn name(&self) -> String {
let mut full_name = get_modifier(self.access_flags);
if let Utf8(s) = &self.constant_pool[&self.name_index - 1] {
full_name.push_str(s);
}
panic!() // name must be utf8
if let Utf8(s) = &self.constant_pool[&self.descriptor_index - 1] {
full_name.push_str(s);
}
full_name
}
}
const MODIFIERS: [(u16, &'static str); 12] = [
(0x0001, "public "),
(0x0002, "private "),
(0x0004, "protected "),
(0x0008, "static "),
(0x0010, "final "),
(0x0020, "synchronized "),
(0x0040, "volatile "),
(0x0080, "transient "),
(0x0100, "native "),
(0x0200, "interface "),
(0x0400, "interface "),
(0x0800, "strict ")];
pub fn get_modifier (value: u16) -> String {
let mut output = String::new();
for m in MODIFIERS {
if value & m.0 == m.0 { output.push_str(&m.1) }
}
output
}

168
tests/class_tests.rs
View file

@ -1,87 +1,89 @@
use std::rc::Rc;
use classfile_reader::types::{Attribute, Class, Field, Method};
use classfile_reader::types::CpEntry::*;
mod test {
use std::rc::Rc;
use classfile_reader::types::{Attribute, Class, Field, Method};
use classfile_reader::types::CpEntry::*;
#[test]
fn get_version() {
assert_eq!((55, 0), get_class().get_version());
}
#[test]
fn get_version() {
assert_eq!((55, 0), get_class().get_version());
}
#[test]
fn get_methods() {
for m in get_class().get_methods() {
println!("{}", m.name());
}
}
fn get_class() -> Class {
let cp = Rc::new(vec![MethodRef(2, 3),
ClassRef(4),
NameAndType(5, 6),
Utf8("java/lang/Object".to_owned()),
Utf8("<init>".to_owned()),
Utf8("()V".to_owned()),
Fieldref(8, 9),
ClassRef(10),
NameAndType(11, 12),
Utf8("com/github/shautvast/reflective/MetaField".to_owned()),
Utf8("name".to_owned()),
Utf8("Ljava/lang/String;".to_owned()),
Fieldref(8, 14),
NameAndType(15, 16),
Utf8("modifiers".to_owned()),
Utf8("I".to_owned()),
Utf8("(Ljava/lang/String;I)V".to_owned()),
Utf8("Code".to_owned()),
Utf8("LineNumberTable".to_owned()),
Utf8("LocalVariableTable".to_owned()),
Utf8("this".to_owned()),
Utf8("Lcom/github/shautvast/reflective/MetaField;".to_owned()),
Utf8("getName".to_owned()),
Utf8("()Ljava/lang/String;".to_owned()),
Utf8("getModifiers".to_owned()),
Utf8("()I".to_owned()),
Utf8("SourceFile".to_owned()),
Utf8("MetaField.java".to_owned())]);
Class {
minor_version: 0,
major_version: 55,
constant_pool: cp.clone(),
interfaces: vec![],
super_class: 2,
access_flags: 33,
this_class: 8,
methods: vec![
Method {
constant_pool: cp.clone(),
access_flags: 1,
name_index: 5,
descriptor_index: 17,
attributes_count: 1,
attributes: vec![Attribute {
attribute_name_index: 18,
info: vec![0, 2, 0, 3, 0, 0, 0, 15, 42, 183, 0, 1, 42, 43, 181, 0, 7, 42, 28,
181, 0, 13, 177, 0, 0, 0, 2, 0, 19, 0, 0, 0,
18, 0, 4, 0, 0, 0, 8, 0, 4, 0, 9, 0, 9, 0, 10, 0, 14, 0, 11, 0, 20, 0, 0,
0, 32, 0, 3, 0, 0, 0, 15, 0, 21, 0, 22, 0, 0, 0, 0, 0, 15, 0, 11,
0, 12, 0, 1, 0, 0, 0, 15, 0, 15, 0, 16, 0, 2],
}],
},
Method {
constant_pool: cp,
access_flags: 1,
name_index: 23,
descriptor_index: 24,
attributes_count: 1,
attributes: vec![Attribute {
attribute_name_index: 18,
info: vec![0, 1, 0, 1, 0, 0, 0, 5, 42, 180, 0, 7, 176, 0, 0, 0, 2, 0, 19, 0, 0, 0, 6, 0,
1, 0, 0, 0, 14, 0, 20, 0, 0, 0, 12, 0, 1, 0, 0, 0, 5, 0, 21, 0, 22, 0, 0],
}],
}],
fields: vec![Field { access_flags: 18, name_index: 11, descriptor_index: 12, attributes_count: 0, attributes: vec![] },
Field { access_flags: 18, name_index: 15, descriptor_index: 16, attributes_count: 0, attributes: vec![] }],
attributes: vec![Attribute { attribute_name_index: 27, info: vec![0, 28] }],
#[test]
fn get_methods() {
for m in get_class().get_methods() {
println!("{}", m.name());
}
}
fn get_class() -> Class {
let cp = Rc::new(vec![MethodRef(2, 3),
ClassRef(4),
NameAndType(5, 6),
Utf8("java/lang/Object".to_owned()),
Utf8("<init>".to_owned()),
Utf8("()V".to_owned()),
Fieldref(8, 9),
ClassRef(10),
NameAndType(11, 12),
Utf8("com/github/shautvast/reflective/MetaField".to_owned()),
Utf8("name".to_owned()),
Utf8("Ljava/lang/String;".to_owned()),
Fieldref(8, 14),
NameAndType(15, 16),
Utf8("modifiers".to_owned()),
Utf8("I".to_owned()),
Utf8("(Ljava/lang/String;I)V".to_owned()),
Utf8("Code".to_owned()),
Utf8("LineNumberTable".to_owned()),
Utf8("LocalVariableTable".to_owned()),
Utf8("this".to_owned()),
Utf8("Lcom/github/shautvast/reflective/MetaField;".to_owned()),
Utf8("getName".to_owned()),
Utf8("()Ljava/lang/String;".to_owned()),
Utf8("getModifiers".to_owned()),
Utf8("()I".to_owned()),
Utf8("SourceFile".to_owned()),
Utf8("MetaField.java".to_owned())]);
Class {
minor_version: 0,
major_version: 55,
constant_pool: cp.clone(),
interfaces: vec![],
super_class: 2,
access_flags: 33,
this_class: 8,
methods: vec![
Method {
constant_pool: cp.clone(),
access_flags: 1,
name_index: 5,
descriptor_index: 17,
attributes_count: 1,
attributes: vec![Attribute {
attribute_name_index: 18,
info: vec![0, 2, 0, 3, 0, 0, 0, 15, 42, 183, 0, 1, 42, 43, 181, 0, 7, 42, 28,
181, 0, 13, 177, 0, 0, 0, 2, 0, 19, 0, 0, 0,
18, 0, 4, 0, 0, 0, 8, 0, 4, 0, 9, 0, 9, 0, 10, 0, 14, 0, 11, 0, 20, 0, 0,
0, 32, 0, 3, 0, 0, 0, 15, 0, 21, 0, 22, 0, 0, 0, 0, 0, 15, 0, 11,
0, 12, 0, 1, 0, 0, 0, 15, 0, 15, 0, 16, 0, 2],
}],
},
Method {
constant_pool: cp,
access_flags: 1,
name_index: 23,
descriptor_index: 24,
attributes_count: 1,
attributes: vec![Attribute {
attribute_name_index: 18,
info: vec![0, 1, 0, 1, 0, 0, 0, 5, 42, 180, 0, 7, 176, 0, 0, 0, 2, 0, 19, 0, 0, 0, 6, 0,
1, 0, 0, 0, 14, 0, 20, 0, 0, 0, 12, 0, 1, 0, 0, 0, 5, 0, 21, 0, 22, 0, 0],
}],
}],
fields: vec![Field { access_flags: 18, name_index: 11, descriptor_index: 12, attributes_count: 0, attributes: vec![] },
Field { access_flags: 18, name_index: 15, descriptor_index: 16, attributes_count: 0, attributes: vec![] }],
attributes: vec![Attribute { attribute_name_index: 27, info: vec![0, 28] }],
}
}
}