scc

commit 3eedc954682df1ec5b47667cc27a9ab69642e7b1
parent 21df8da7aed52515d5149538a9a1c5d622e4a166
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Wed, 26 Feb 2025 10:14:10 +0100

libc/wchar: Add mbsinit()

As we only support utf8 for multibyte streams the
implementation of mbsinit() is trivial because utf8
is stateless.

Diffstat:
M
src/libc/objs/common-objs.mk
 | 
1
+
M
src/libc/wchar/Makefile
 | 
1
+
A
src/libc/wchar/mbsinit.c
 | 
11
+++++++++++

3 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/src/libc/objs/common-objs.mk b/src/libc/objs/common-objs.mk
@@ -123,6 +123,7 @@ COMMON_OBJS =\
 	wchar/fputwc.$O\
 	wchar/mbrlen.$O\
 	wchar/mbrtowc.$O\
+	wchar/mbsinit.$O\
 	wchar/mbsrtowcs.$O\
 	wchar/wcrtomb.$O\
 	wchar/wcslen.$O\
diff --git a/src/libc/wchar/Makefile b/src/libc/wchar/Makefile
@@ -7,6 +7,7 @@ OBJS =\
 	fputwc.$O\
 	mbrlen.$O\
 	mbrtowc.$O\
+	mbsinit.$O\
 	mbsrtowcs.$O\
 	wcrtomb.$O\
 	wcslen.$O\
diff --git a/src/libc/wchar/mbsinit.c b/src/libc/wchar/mbsinit.c
@@ -0,0 +1,11 @@
+#include <wchar.h>
+
+#undef mbsinit
+
+int
+mbsinit(const mbstate_t *ps)
+{
+	if (!ps)
+		return 1;
+	return *ps == 0;
+}