transpile: add memcpy of str literal macro test to macros.c snapshot (os-specific)

Author: kkysen

c2rust-transpile/tests/snapshots/os-specific/macros.c

@@ -1,5 +1,6 @@
 #include <errno.h>
 #include <stdbool.h>
+#include <string.h>
 
 bool errno_is_error() { return errno != 0; }
 
@@ -17,3 +18,13 @@ int size_of_dynamic(int n) {
   return SIZE;
 }
 #endif
+
+// From Lua's `lobject.c`.
+
+#define POS "\"]"
+/* number of chars of a literal string without the ending \0 */
+#define LL(x) (sizeof(x) / sizeof(char) - 1)
+
+void memcpy_str_literal(char *out) {
+  memcpy(out, POS, (LL(POS) + 1) * sizeof(char));
+}

c2rust-transpile/tests/snapshots/[email protected]

@@ -14,7 +14,13 @@ input_file: c2rust-transpile/tests/snapshots/os-specific/macros.c
 )]
 extern "C" {
     fn __errno_location() -> *mut std::ffi::c_int;
+    fn memcpy(
+        __dest: *mut std::ffi::c_void,
+        __src: *const std::ffi::c_void,
+        __n: size_t,
+    ) -> *mut std::ffi::c_void;
 }
+pub type size_t = usize;
 #[no_mangle]
 pub unsafe extern "C" fn errno_is_error() -> bool {
     return *__errno_location() != 0 as std::ffi::c_int;
@@ -24,3 +30,15 @@ pub unsafe extern "C" fn size_of_const() -> std::ffi::c_int {
     let mut a: [std::ffi::c_int; 10] = [0; 10];
     return ::core::mem::size_of::<[std::ffi::c_int; 10]>() as std::ffi::c_int;
 }
+#[no_mangle]
+pub unsafe extern "C" fn memcpy_str_literal(mut out: *mut std::ffi::c_char) {
+    memcpy(
+        out as *mut std::ffi::c_void,
+        b"\"]\0" as *const u8 as *const std::ffi::c_char as *const std::ffi::c_void,
+        (::core::mem::size_of::<[std::ffi::c_char; 3]>() as size_t)
+            .wrapping_div(::core::mem::size_of::<std::ffi::c_char>() as size_t)
+            .wrapping_sub(1 as size_t)
+            .wrapping_add(1 as size_t)
+            .wrapping_mul(::core::mem::size_of::<std::ffi::c_char>() as size_t),
+    );
+}

c2rust-transpile/tests/snapshots/[email protected]

@@ -14,7 +14,14 @@ input_file: c2rust-transpile/tests/snapshots/os-specific/macros.c
 )]
 extern "C" {
     fn __error() -> *mut std::ffi::c_int;
+    fn memcpy(
+        __dst: *mut std::ffi::c_void,
+        __src: *const std::ffi::c_void,
+        __n: size_t,
+    ) -> *mut std::ffi::c_void;
 }
+pub type __darwin_size_t = usize;
+pub type size_t = __darwin_size_t;
 #[no_mangle]
 pub unsafe extern "C" fn errno_is_error() -> bool {
     return *__error() != 0 as std::ffi::c_int;
@@ -24,3 +31,15 @@ pub unsafe extern "C" fn size_of_const() -> std::ffi::c_int {
     let mut a: [std::ffi::c_int; 10] = [0; 10];
     return ::core::mem::size_of::<[std::ffi::c_int; 10]>() as std::ffi::c_int;
 }
+#[no_mangle]
+pub unsafe extern "C" fn memcpy_str_literal(mut out: *mut std::ffi::c_char) {
+    memcpy(
+        out as *mut std::ffi::c_void,
+        b"\"]\0" as *const u8 as *const std::ffi::c_char as *const std::ffi::c_void,
+        (::core::mem::size_of::<[std::ffi::c_char; 3]>() as size_t)
+            .wrapping_div(::core::mem::size_of::<std::ffi::c_char>() as size_t)
+            .wrapping_sub(1 as size_t)
+            .wrapping_add(1 as size_t)
+            .wrapping_mul(::core::mem::size_of::<std::ffi::c_char>() as size_t),
+    );
+}