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libc: wchar: initial wcwidth implementation (incomplete)

--- a/include/wchar.h

+++ b/include/wchar.h

@@ -91,6 +91,5 @@

 extern size_t wcrtomb(char * restrict s, wchar_t wc, mbstate_t * restrict ps);

 extern size_t mbsrtowcs(wchar_t * restrict dst, const char ** restrict src, size_t len, mbstate_t * restrict ps);

 extern size_t wcsrtombs(char * restrict dst, const wchar_t ** restrict src, size_t len, mbstate_t * restrict ps);

-

-

+extern int wcwidth(wchar_t wc);

 #endif

--- a/src/libc/Makefile

+++ b/src/libc/Makefile

@@ -9,6 +9,7 @@

 	stdlib\

 	string\

 	time\

+	wchar\

 	arch\

 include $(PROJECTDIR)/scripts/rules.mk

--- /dev/null

+++ b/src/libc/wchar/Makefile

@@ -1,0 +1,11 @@

+.POSIX:

+PROJECTDIR =../../..

+include $(PROJECTDIR)/scripts/rules.mk

+include ../rules.mk

+

+OBJS =\

+	wcwidth.$O\

+

+all: $(OBJS)

+

+include deps.mk

--- /dev/null

+++ b/src/libc/wchar/deps.mk

@@ -1,0 +1,1 @@

+#deps

--- /dev/null

+++ b/src/libc/wchar/wcwidth.c

@@ -1,0 +1,13 @@

+#include <wchar.h>

+#undef wcwidth

+

+/* incomplete, needs a real implementation */

+int

+wcwidth(wchar_t wc)

+{

+	if (!wc)

+		return 0;

+	else if (wc < 32 || wc >= 127)

+		return -1;

+	return 1;

+}