liblinux++

commit 37dc9cbfdf01c7af51c09c1645d07de844c97ee1
parent 47b5c18d7c9d1e8f8872a16d4bb92e7cb994fff2
Author: Henry Wilson <henry@henryandlizzy.uk>
Date:   Tue, 23 Dec 2025 00:33:53 +0000

introduce c_str for null-terminated strings

Diffstat:
M
linux.hpp
 | 
23
++++++++++++++++++++---
M
x86_64.s
 | 
2
+-

2 files changed, 21 insertions(+), 4 deletions(-)
diff --git a/linux.hpp b/linux.hpp
@@ -100,17 +100,34 @@ private:
 	int64_t val;
 };
 
+struct c_str
+{
+	constexpr c_str(char const *p)
+	: str{p}
+	{}
+
+	template <size_t N>
+	constexpr c_str(char const (&arr)[N])
+	: str{arr}
+	{
+		static_assert(N > 0);
+		static_assert(arr[N-1] == '\0');
+	}
+private:
+	char const* str;
+};
+
 [[noreturn]]
 extern void exit(int error_code);
 
-extern syscall_result<size_t> read(file fd, char* data, size_t count);
+extern syscall_result<size_t> read(file fd, char data[], size_t count);
 extern syscall_result<size_t> read(file fd, span<char> data);
 
-extern syscall_result<size_t> write(file fd, char const* data, size_t count);
+extern syscall_result<size_t> write(file fd, char const data[], size_t count);
 extern syscall_result<size_t> write(file fd, span<char const> data);
 extern syscall_result<size_t> write(file fd, span<span<char const> const> data);
 
-extern syscall_result<file> openat(int fd, char const* name, int flags, int mode);
+extern syscall_result<file> openat(int fd, c_str name, int flags, int mode);
 
 extern syscall_result<void> close(file fd);
 
diff --git a/x86_64.s b/x86_64.s
@@ -76,5 +76,5 @@ extern getdents64
 _syscall	217	syscall3
 
 extern openat
-extern_alias _Z6openatiPKcii
+extern_alias _Z6openati5c_strii
 _syscall	257	syscall6