scc

commit aef615310c0729e97e4ad5a2e4206266660679a2
parent 09245abd272928c778c739e2402517a464b1a678
Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date:   Wed, 26 Mar 2025 14:14:28 +0100

libc/wchar: Add wcsxfrm()

Diffstat:
M
src/libc/objs/common-objs.mk
 | 
1
+
A
src/libc/wchar/wcsxfrm.c
 | 
13
+++++++++++++
M
tests/libc/execute/.gitignore
 | 
1
+
A
tests/libc/execute/0060-wcsxfrm.c
 | 
27
+++++++++++++++++++++++++++
M
tests/libc/execute/libc-tests.lst
 | 
1
+

5 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/src/libc/objs/common-objs.mk b/src/libc/objs/common-objs.mk
@@ -136,6 +136,7 @@ COMMON_OBJS =\
 	wchar/wcschr.$O\
 	wchar/wcsrchr.$O\
 	wchar/wcsstr.$O\
+	wchar/wcsxfrm.$O\
 	wchar/wcsrtombs.$O\
 	wchar/wcwidth.$O\
 	wchar/wmemchr.$O\
diff --git a/src/libc/wchar/wcsxfrm.c b/src/libc/wchar/wcsxfrm.c
@@ -0,0 +1,13 @@
+#include <wchar.h>
+
+#undef wcsxfrm
+
+size_t
+wcsxfrm(wchar_t *dst, const wchar_t *src, size_t n)
+{
+	size_t len = wcslen(src);
+
+	if (len < n)
+		wcscpy(dst, src);
+	return len;
+}
diff --git a/tests/libc/execute/.gitignore b/tests/libc/execute/.gitignore
@@ -56,4 +56,5 @@
 0057-wcschr
 0058-wcsrchr
 0059-wcsstr
+0060-wcsxfrm
 test.log
diff --git a/tests/libc/execute/0060-wcsxfrm.c b/tests/libc/execute/0060-wcsxfrm.c
@@ -0,0 +1,27 @@
+#include <assert.h>
+#include <stdio.h>
+#include <wchar.h>
+
+/*
+output:
+testing
+done
+end:
+*/
+
+int
+main()
+{
+	wchar_t buf[40];
+	size_t n;
+
+	puts("testing");
+
+	assert(wcsxfrm(buf, L"test", 40) == 4);
+	assert(wcsxfrm(buf, L"", 0) == 0);
+	assert(wcsxfrm(NULL, L"abc", 0) > 0);
+
+	puts("done");
+
+	return 0;
+}
diff --git a/tests/libc/execute/libc-tests.lst b/tests/libc/execute/libc-tests.lst
@@ -55,3 +55,4 @@
 0057-wcschr
 0058-wcsrchr
 0059-wcsstr
+0060-wcsxfrm