hare

commit fb59d6db4e6cba353218c300a24cbd23bcacb21d
parent 82819789e4405858c38d51688c660a7ed0ab220b
Author: Drew DeVault <sir@cmpwn.com>
Date:   Tue,  2 Mar 2021 15:16:39 -0500

strings: add strings::to_c

Diffstat:
M
strings/cstrings.ha
 | 
14
++++++++++++++

1 file changed, 14 insertions(+), 0 deletions(-)
diff --git a/strings/cstrings.ha b/strings/cstrings.ha
@@ -1,5 +1,6 @@
 use encoding::utf8;
 use types;
+use rt;
 
 let emptybuf: [1]u8 = [0];
 
@@ -35,3 +36,16 @@ export fn from_c(cstr: *const char) const str = {
 	assert(utf8::valid(s));
 	return s;
 };
+
+// Converts a Hare string to a C string. The result is allocated, the caller
+// must free it when they're done.
+export fn to_c(s: const str) *char = {
+	let ptr = rt::malloc(len(s) + 1): nullable *[*]u8;
+	let ptr = match (ptr) {
+		null => abort("Out of memory"),
+		p: *[*]u8 => p,
+	};
+	rt::memcpy(ptr, (&s: *types::string).data, len(s));
+	ptr[len(s)] = 0;
+	return ptr: *char;
+};