libc/wchar: Add wmemchr() - scc - simple c99 compiler
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---
(DIR) commit bbb33960d11eacc45a1ea00d60bf46a39ae9693b
(DIR) parent 3b42911841f616a37e3fa7bd5f4ad7177ce959cf
(HTM) 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(-)
---
(DIR) 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\
(DIR) 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;
+}
(DIR) 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
(DIR) 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;
+}
(DIR) 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