scc

commit bbb33960d11eacc45a1ea00d60bf46a39ae9693b
parent 3b42911841f616a37e3fa7bd5f4ad7177ce959cf
Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date:   Tue, 25 Mar 2025 18:30:34 +0100

libc/wchar: Add wmemchr()

Diffstat:
M
src/libc/objs/common-objs.mk
 | 
1
+
A
src/libc/wchar/wmemchr.c
 | 
11
+++++++++++
M
tests/libc/execute/.gitignore
 | 
1
+
A
tests/libc/execute/0049-wmemchr.c
 | 
25
+++++++++++++++++++++++++
M
tests/libc/execute/libc-tests.lst
 | 
1
+

5 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/src/libc/objs/common-objs.mk b/src/libc/objs/common-objs.mk
@@ -133,5 +133,6 @@ COMMON_OBJS =\
 	wchar/wcscpy.$O\
 	wchar/wcsrtombs.$O\
 	wchar/wcwidth.$O\
+	wchar/wmemchr.$O\
 	wchar/putwc.$O\
 	wchar/_validutf8.$O\
diff --git a/src/libc/wchar/wmemchr.c b/src/libc/wchar/wmemchr.c
@@ -0,0 +1,11 @@
+#include <wchar.h>
+
+wchar_t *
+wmemchr(const wchar_t *s, wchar_t c, size_t n)
+{
+	wchar_t *bp = (wchar_t *) s;
+
+	for ( ; n > 0 && *bp != c; n--)
+		++bp;
+	return (n == 0) ? NULL : bp;
+}
diff --git a/tests/libc/execute/.gitignore b/tests/libc/execute/.gitignore
@@ -45,4 +45,5 @@
 0046-wcsncmp
 0047-wcscoll
 0048-wcscpy
+0049-wmemchr
 test.log
diff --git a/tests/libc/execute/0049-wmemchr.c b/tests/libc/execute/0049-wmemchr.c
@@ -0,0 +1,25 @@
+#include <assert.h>
+#include <stdio.h>
+#include <wchar.h>
+
+/*
+output:
+testing
+done
+end:
+*/
+
+int
+main()
+{
+	wchar_t buf[] = {0, 1, 2, 3, 4, 160};
+
+	puts("testing");
+	assert(wmemchr(buf, 2, 6) == buf+2);
+	assert(wmemchr(buf, 2, 0) == NULL);
+	assert(wmemchr(buf, 150, 6) == NULL);
+	assert(wmemchr(buf, 160, 6) == buf+5);
+	puts("done");
+
+	return 0;
+}
diff --git a/tests/libc/execute/libc-tests.lst b/tests/libc/execute/libc-tests.lst
@@ -44,3 +44,4 @@
 0046-wcsncmp
 0047-wcscoll
 0048-wcscpy
+0049-wmemchr