Automatical formatting
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18fcdc6e59
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@ -5,7 +5,5 @@
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fn main() {
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fn main() {
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// Tell Cargo that if the given file changes, to rerun this build script.
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// Tell Cargo that if the given file changes, to rerun this build script.
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println!("cargo:rerun-if-changed=src/hello.c");
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println!("cargo:rerun-if-changed=src/hello.c");
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cc::Build::new()
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cc::Build::new().file("lib/test.c").compile("test");
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.file("lib/test.c")
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.compile("test");
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}
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}
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@ -23,20 +23,18 @@ fn main() {
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// confirmed safe inputs
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// confirmed safe inputs
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let qux = unsafe { ret19() };
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let qux = unsafe { ret19() };
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println!("`ret19()` returned {qux}");
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println!("`ret19()` returned {qux}");
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let st = MyStruct {
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let st = MyStruct { foo: 17, bar: 0x41 };
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foo: 17, bar: 0x41
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};
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// converting a c "string" to a real rust String is
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// converting a c "string" to a real rust String is
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// a bit complicated
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// a bit complicated
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let info: &str = unsafe {
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let info: &str = unsafe {
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// convert the returned value to a rust internal CStr.
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// convert the returned value to a rust internal CStr.
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std::ffi::CStr::from_ptr(
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std::ffi::CStr::from_ptr(
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// the function returns a pointer to a array of chars on the heap
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// the function returns a pointer to a array of chars on the heap
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structInfo(&st)
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structInfo(&st),
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)
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)
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// now to a string slice (result)
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// now to a string slice (result)
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.to_str()
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.to_str()
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.unwrap()
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.unwrap()
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};
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};
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println!("{info}");
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println!("{info}");
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}
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}
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@ -1,4 +1,4 @@
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use std::any::{TypeId, type_name};
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use std::any::{type_name, TypeId};
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//* # See what's behind the primitive datatypes of Rust
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//* # See what's behind the primitive datatypes of Rust
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//*
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//*
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//* This Crate shows off, how primitive Types of rust are stored in memory.
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//* This Crate shows off, how primitive Types of rust are stored in memory.
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@ -26,8 +26,10 @@ macro_rules! investigate {
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unsafe {
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unsafe {
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for (index, item) in $v.iter().enumerate() {
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for (index, item) in $v.iter().enumerate() {
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let pointer = item as *const $t;
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let pointer = item as *const $t;
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let raw_pointer: [u8; std::mem::size_of::<$t>()] = std::mem::transmute(item.clone());
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let raw_pointer: [u8; std::mem::size_of::<$t>()] =
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println!("\t{index:02x}\titem:\t{item:?}\n\
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std::mem::transmute(item.clone());
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println!(
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"\t{index:02x}\titem:\t{item:?}\n\
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\t\tpointer: {:X?}\n\
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\t\tpointer: {:X?}\n\
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\t\talign: {:#X} B\n\
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\t\talign: {:#X} B\n\
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\t\tmemory: {:X?}\n",
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\t\tmemory: {:X?}\n",
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@ -1,6 +1,6 @@
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fn main() {
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fn main() {
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println!(
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println!(
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"The dark power of unsafe rust awakens!
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"The dark power of unsafe rust awakens!
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This is the default executable! It does not do much, use another executable.
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This is the default executable! It does not do much, use another executable.
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@ -9,5 +9,6 @@ Select your target like this:
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To see a list of all runnable binaries, you can use the following command.
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To see a list of all runnable binaries, you can use the following command.
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`cargo run --bin`
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`cargo run --bin`
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");
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"
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);
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}
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}
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