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	libc/wchar: Add wcsncmp() - scc - simple c99 compiler
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	---
	commit 01921365fc084e3b592c00bdd090d0d457502904
	parent e5399b363bcd8af06edc6bb4ba9edb034bcbe728
	Author: Roberto E. Vargas Caballero <[email protected]>
	Date: Fri, 21 Mar 2025 19:21:44 +0100

	libc/wchar: Add wcsncmp()

	Diffstat:
	M src/libc/objs/common-objs.mk \| 1 +
	A src/libc/wchar/wcsncmp.c \| 18 ++++++++++++++++++
	M tests/libc/execute/.gitignore \| 1 +
	A tests/libc/execute/0046-wcsncmp.c \| 30 ++++++++++++++++++++++++++++++
	M tests/libc/execute/libc-tests.lst \| 1 +

	5 files changed, 51 insertions(+), 0 deletions(-)
	---
	diff --git a/src/libc/objs/common-objs.mk b/src/libc/objs/common-objs.mk
	@@ -128,6 +128,7 @@ COMMON_OBJS =\
	wchar/wcrtomb.$O\
	wchar/wcslen.$O\
	wchar/wcscmp.$O\
	+ wchar/wcsncmp.$O\
	wchar/wcsrtombs.$O\
	wchar/wcwidth.$O\
	wchar/putwc.$O\
	diff --git a/src/libc/wchar/wcsncmp.c b/src/libc/wchar/wcsncmp.c
	@@ -0,0 +1,18 @@
	+#include <wchar.h>
	+
	+#undef wcsncmp
	+
	+int
	+wcsncmp(const wchar_t s1, const wchar_t s2, size_t n)
	+{
	+ unsigned long l1, l2;
	+
	+ for ( ; n > 0 && s1 == s2; --n)
	+ ++s1, ++s2;
	+
	+ if (n == 0)
	+ return 0;
	+ l1 = s1, l2 = s2;
	+
	+ return l1 - l2;
	+}
	diff --git a/tests/libc/execute/.gitignore b/tests/libc/execute/.gitignore
	@@ -41,4 +41,5 @@
	0041-mbrlen
	0044-wcslen
	0045-wcscmp
	+0046-wcsncmp
	test.log
	diff --git a/tests/libc/execute/0046-wcsncmp.c b/tests/libc/execute/0046-wcsncm…
	@@ -0,0 +1,30 @@
	+#include <assert.h>
	+#include <stdio.h>
	+#include <wchar.h>
	+
	+/*
	+output:
	+testing
	+done
	+end:
	+*/
	+
	+int
	+main(void)
	+{
	+ wchar_t t1[] = {0};
	+ wchar_t t2[] = {0};
	+ wchar_t t3[] = {0x31, 0};
	+ wchar_t t4[] = {0x31, 0};
	+ wchar_t t5[] = {0x32, 0x33, 0};
	+
	+ puts("testing");
	+ assert(wcsncmp(t1, t1, 0) == 0);
	+ assert(wcsncmp(t1, t2, 0) == 0);
	+ assert(wcsncmp(t3, t4, 1) == 0);
	+ assert(wcsncmp(t3, t5, 1) < 0);
	+ assert(wcsncmp(t5, t3, 1) > 0);
	+ puts("done");
	+
	+ return 0;
	+}
	diff --git a/tests/libc/execute/libc-tests.lst b/tests/libc/execute/libc-tests.…
	@@ -40,3 +40,4 @@
	0041-mbrlen
	0044-wcslen
	0045-wcscmp
	+0046-wcsncmp