libc/wchar: Add wcscspn() - scc - simple c99 compiler
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---
(DIR) commit 5a4639f2e13052cfd4ff099cf1fcee020af58a55
(DIR) parent d21aa5a5a185cacd7a63439788287ef6564ad5e2
(HTM) Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date: Wed, 26 Mar 2025 14:34:58 +0100
libc/wchar: Add wcscspn()
Diffstat:
M src/libc/objs/common-objs.mk | 1 +
A src/libc/wchar/wcscspn.c | 14 ++++++++++++++
M tests/libc/execute/.gitignore | 1 +
A tests/libc/execute/0062-wcscspn.c | 25 +++++++++++++++++++++++++
M tests/libc/execute/libc-tests.lst | 1 +
5 files changed, 42 insertions(+), 0 deletions(-)
---
(DIR) diff --git a/src/libc/objs/common-objs.mk b/src/libc/objs/common-objs.mk
@@ -138,6 +138,7 @@ COMMON_OBJS =\
wchar/wcsstr.$O\
wchar/wcsxfrm.$O\
wchar/wcsspn.$O\
+ wchar/wcscspn.$O\
wchar/wcsrtombs.$O\
wchar/wcwidth.$O\
wchar/wmemchr.$O\
(DIR) diff --git a/src/libc/wchar/wcscspn.c b/src/libc/wchar/wcscspn.c
@@ -0,0 +1,14 @@
+#include <wchar.h>
+
+#undef wcscspn
+
+size_t
+wcscspn(const wchar_t *s, const wchar_t *reject)
+{
+ wchar_t wc;
+ const wchar_t *p;
+
+ for (p = s; (wc = *p) && !wcschr(reject, wc); p++)
+ ;
+ return p - s;
+}
(DIR) diff --git a/tests/libc/execute/.gitignore b/tests/libc/execute/.gitignore
@@ -58,4 +58,5 @@
0059-wcsstr
0060-wcsxfrm
0061-wcsspn
+0062-wcscspn
test.log
(DIR) diff --git a/tests/libc/execute/0062-wcscspn.c b/tests/libc/execute/0062-wcscspn.c
@@ -0,0 +1,25 @@
+#include <assert.h>
+#include <stdio.h>
+#include <wchar.h>
+
+/*
+output:
+testing
+done
+end:
+*/
+
+int
+main()
+{
+ puts("testing");
+
+ assert(wcscspn(L"0125", L"56789") == 3);
+ assert(wcscspn(L"", L"56789") == 0);
+ assert(wcscspn(L"01234", L"") == 5);
+ assert(wcscspn(L"", L"") == 0);
+
+ puts("done");
+
+ return 0;
+}
(DIR) diff --git a/tests/libc/execute/libc-tests.lst b/tests/libc/execute/libc-tests.lst
@@ -57,3 +57,4 @@
0059-wcsstr
0060-wcsxfrm
0061-wcsspn
+0062-wcscspn