libc/wchar: Add wcsncat() - scc - simple c99 compiler
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---
(DIR) commit 4ac2c9373b1004d4176807d0b106c97cbdab8163
(DIR) parent 949d7de20391cbcb0a6ce10cf2080abb7914b6b5
(HTM) Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date: Tue, 25 Mar 2025 20:56:32 +0100
libc/wchar: Add wcsncat()
Diffstat:
M src/libc/objs/common-objs.mk | 1 +
A src/libc/wchar/wcsncat.c | 18 ++++++++++++++++++
M tests/libc/execute/.gitignore | 1 +
A tests/libc/execute/0056-wcsncat.c | 58 ++++++++++++++++++++++++++++++
M tests/libc/execute/libc-tests.lst | 1 +
5 files changed, 79 insertions(+), 0 deletions(-)
---
(DIR) diff --git a/src/libc/objs/common-objs.mk b/src/libc/objs/common-objs.mk
@@ -132,6 +132,7 @@ COMMON_OBJS =\
wchar/wcsncmp.$O\
wchar/wcscpy.$O\
wchar/wcscat.$O\
+ wchar/wcsncat.$O\
wchar/wcsrtombs.$O\
wchar/wcwidth.$O\
wchar/wmemchr.$O\
(DIR) diff --git a/src/libc/wchar/wcsncat.c b/src/libc/wchar/wcsncat.c
@@ -0,0 +1,18 @@
+#include <wchar.h>
+
+#undef wcsncat
+
+wchar_t *
+wcsncat(wchar_t *restrict s1, const wchar_t *restrict s2, size_t n)
+{
+ wchar_t *ret;
+
+ for (ret = s1; *s1; ++s1)
+ ;
+ while (n-- > 0 && *s2)
+ *s1++ = *s2++;
+ *s1 = '\0';
+
+ return ret;
+
+}
(DIR) diff --git a/tests/libc/execute/.gitignore b/tests/libc/execute/.gitignore
@@ -52,4 +52,5 @@
0053-wmemcmp
0054-wcsncpy
0055-wcscat
+0056-wcsncat
test.log
(DIR) diff --git a/tests/libc/execute/0056-wcsncat.c b/tests/libc/execute/0056-wcsncat.c
@@ -0,0 +1,58 @@
+#include <assert.h>
+#include <stdio.h>
+#include <wchar.h>
+
+/*
+output:
+testing
+test1
+test2
+test3
+test4
+test5
+done
+end:
+*/
+
+int
+main()
+{
+ wchar_t *s, buf[40], buf2[40];
+
+ puts("testing");
+
+ puts("test1");
+ wcscpy(buf, L"01234");
+ s = wcsncat(buf, L"567", 8);
+ assert(s == buf);
+ assert(!wcscmp(s, L"01234567"));
+
+ puts("test2");
+ wcscpy(buf, L"01234");
+ s = wcsncat(buf, L"567", 2);
+ assert(s == buf);
+ assert(!wcscmp(s, L"0123456"));
+
+ puts("test3");
+ wcscpy(buf, L"01234");
+ wmemcpy(buf2, L"567", 3);
+ s = wcsncat(buf, buf2, 3);
+ assert(s == buf);
+ assert(!wcscmp(s, L"01234567"));
+
+ puts("test4");
+ wcscpy(buf, L"01234");
+ s = wcsncat(buf, L"", 7);
+ assert(s == buf);
+ assert(!wcscmp(s, L"01234"));
+
+ puts("test5");
+ wcscpy(buf, L"01234");
+ s = wcsncat(buf, L"", 0);
+ assert(s == buf);
+ assert(!wcscmp(s, L"01234"));
+
+ puts("done");
+
+ return 0;
+}
(DIR) diff --git a/tests/libc/execute/libc-tests.lst b/tests/libc/execute/libc-tests.lst
@@ -51,3 +51,4 @@
0053-wmemcmp
0054-wcsncpy
0055-wcscat
+0056-wcsncat