[Libguestfs] [PATCH 04/12] Rust bindings: Add generator of structs
From: Hiroyuki_Katsura <hiroyuki.katsura.0513(a)gmail.com>
---
generator/rust.ml | 87 +++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 85 insertions(+), 2 deletions(-)
diff --git a/generator/rust.ml b/generator/rust.ml
index d235dbefe..0b0069e0a 100644
--- a/generator/rust.ml
+++ b/generator/rust.ml
@@ -29,12 +29,20 @@ open Structs
open C
open Events
+let rec indent n = match n with
+ | x when x > 0 -> pr " "; indent (x - 1)
+ | _ -> ()
+
let generate_rust () =
generate_header CStyle LGPLv2plus;
pr "
+use std::ffi;
+use std::slice;
+use std::os::raw::c_char;
+
#[allow(non_camel_case_types)]
-enum guestfs_h {}
+enum guestfs_h {} // opaque struct
#[link(name = \"guestfs\")]
extern \"C\" {
@@ -118,5 +126,80 @@ impl Handle {
}
}
}
- "
+
+pub struct UUID {
+ uuid: [u8; 32]
+}
+
+impl UUID {
+ fn new(uuid: [u8; 32]) -> UUID {
+ UUID { uuid }
+ }
+}
+";
+ List.iter (
+ fun { s_camel_name = name; s_name = c_name; s_cols = cols } ->
+ pr "\n";
+ pr "pub struct %s {\n" name;
+ List.iter (
+ function
+ | n, FChar -> pr " %s: i8,\n" n
+ | n, FString -> pr " %s: String,\n" n
+ | n, FBuffer -> pr " %s: Vec<u8>,\n" n
+ | n, FUInt32 -> pr " %s: u32,\n" n
+ | n, FInt32 -> pr " %s: i32,\n" n
+ | n, (FUInt64 | FBytes) -> pr " %s: u64,\n" n
+ | n, FInt64 -> pr " %s: i64,\n" n
+ | n, FUUID -> pr " %s: UUID,\n" n
+ | n, FOptPercent -> pr " %s: Option<f32>,\n" n
+ ) cols;
+ pr "}\n";
+ pr "#[repr(C)]\n";
+ pr "struct Raw%s {\n" name;
+ List.iter (
+ function
+ | n, FChar -> pr " %s: c_char,\n" n
+ | n, FString -> pr " %s: *const c_char,\n" n
+ | n, FBuffer ->
+ pr " %s_len: usize,\n" n;
+ pr " %s: *const c_char,\n" n;
+ | n, FUUID -> pr " %s: [u8; 32],\n" n
+ | n, FUInt32 -> pr " %s: u32,\n" n
+ | n, FInt32 -> pr " %s: i32,\n" n
+ | n, (FUInt64 | FBytes) -> pr " %s: u64,\n" n
+ | n, FInt64 -> pr " %s: i64,\n" n
+ | n, FOptPercent -> pr " %s: f32,\n" n
+ ) cols;
+ pr "}\n";
+ pr "\n";
+ pr "impl %s {\n" name;
+ pr " fn new(raw: *const Raw%s) -> %s {\n" name name;
+ pr " unsafe { %s {\n" name;
+ List.iter (
+ fun x ->
+ indent 3;
+ match x with
+ | n, FChar ->
+ pr "%s: (*raw).%s as i8,\n" n n;
+ | n, FString ->
+ pr "%s: {\n" n;
+ indent 4;
+ pr "let s = ffi::CStr::from_ptr((*raw).%s);\n" n;
+ indent 4;
+ pr "s.to_str().unwrap().to_string()\n";
+ indent 3;
+ pr "},\n"
+ | n, FBuffer ->
+ pr "%s: slice::from_raw_parts((*raw).%s as *const u8,
(*raw).%s_len).to_vec(),\n" n n n
+ | n, FUUID ->
+ pr "%s: UUID::new((*raw).%s),\n" n n
+ | n, (FUInt32 | FInt32 | FUInt64 | FInt64 | FBytes) ->
+ pr "%s: (*raw).%s,\n" n n
+ | n, FOptPercent ->
+ pr "%s: if (*raw).%s < 0.0 { None } else { Some((*raw).%s) },\n"
n n n
+ ) cols;
+ pr " } }\n";
+ pr " }\n";
+ pr "}\n"
+ ) external_structs;
--
2.20.1 (Apple Git-117)