From 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Sun, 7 Apr 2024 13:41:34 -0500 Subject: new repository --- devdocs/c/string%2Fwide%2Fwcsspn.html | 37 +++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 devdocs/c/string%2Fwide%2Fwcsspn.html (limited to 'devdocs/c/string%2Fwide%2Fwcsspn.html') diff --git a/devdocs/c/string%2Fwide%2Fwcsspn.html b/devdocs/c/string%2Fwide%2Fwcsspn.html new file mode 100644 index 00000000..1fc9c8b2 --- /dev/null +++ b/devdocs/c/string%2Fwide%2Fwcsspn.html @@ -0,0 +1,37 @@ +

wcsspn

Defined in header <wchar.h> 
size_t wcsspn( const wchar_t* dest, const wchar_t* src );
+		 (since C95)

Returns the length of the maximum initial segment of the wide string pointed to by dest, that consists of only the characters found in wide string pointed to by src.

+

Parameters

+ + +
dest - pointer to the null-terminated wide string to be analyzed
src - pointer to the null-terminated wide string that contains the characters to search for

Return value

The length of the maximum initial segment that contains only characters from wide string pointed to by src

+

Example

#include <locale.h>
+#include <wchar.h>
+ 
+int main(void)
+{
+    wchar_t dest[] = L"白猫 黑狗 甲虫";
+    const wchar_t src[] = L" 狗猫 白黑 ";
+    const size_t len = wcsspn(dest, src);
+    dest[len] = L'\0'; /* terminates the segment to print it out */
+ 
+    setlocale(LC_ALL, "en_US.utf8");
+    wprintf(L"The length of maximum initial segment is %td.\n"
+            L"The segment is \"%ls\".\n", len, dest);
+}

Output:

+
The length of maximum initial segment is 6.
+The segment is "白猫 黑狗 ".

References

See also

+ + +
+
(C95)
 returns the length of the maximum initial segment that consists
of only the wide chars not found in another wide string
(function)
+
(C95)
 finds the first location of any wide character in one wide string, in another wide string
(function)
C++ documentation for wcsspn
+

+ © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
+ https://en.cppreference.com/w/c/string/wide/wcsspn +

+
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