2 releases
0.1.1 | Jan 4, 2022 |
---|---|
0.1.0 | Feb 11, 2021 |
#155 in FFI
205KB
5K
SLoC
cly
cly is a program that calculates the layout of C types using a domain-specific language.
Example
~$ cat input
const C = sizeof(char) + sizeof(long)
A = @pragma_pack(2) struct {
c char,
@align(4) i int:3,
j int:5,
k [C]short,
}
~$ cly --target x86_64-unknown-linux-gnu input
const C = {9}sizeof(char) + sizeof(long)
A = { size: 176, alignment: 16 }@pragma_pack(2) struct {
{ offset: 0, size: 8 }c { size: 8, alignment: 8 }char,
{ offset: 16, size: 3 }@align(4) i { size: 32, alignment: 32 }int:3,
{ offset: 19, size: 5 }j { size: 32, alignment: 32 }int:5,
{ offset: 32, size: 144 }k { size: 144, alignment: 16 }[{9}C]{ size: 16, alignment: 16 }short,
}
~$ cly --target i686-pc-windows-msvc input
const C = {5}sizeof(char) + sizeof(long)
A = { size: 144, field_alignment: 32, pointer_alignment: 16 }@pragma_pack(2) struct {
{ offset: 0, size: 8 }c { size: 8, alignment: 8 }char,
{ offset: 32, size: 3 }@align(4) i { size: 32, alignment: 32 }int:3,
{ offset: 35, size: 5 }j { size: 32, alignment: 32 }int:5,
{ offset: 64, size: 80 }k { size: 80, alignment: 16 }[{5}C]{ size: 16, alignment: 16 }short,
}
See examples.md for a full description of the program input and output.
Installation
You can install cly with cargo:
~$ cargo install cly
Grammar
The full grammar of the domain-specific language is described in grammar.md
License
cly is licensed under the GPLv3 or later.
Dependencies
~1MB