std:: wcscspn
From cppreference.com
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Defined in header
<cwchar>
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std::
size_t
wcscspn
(
const
wchar_t
*
dest,
const
wchar_t
*
src
)
;
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Returns the length of the maximum initial segment of the wide string pointed to by dest , that consists of only the characters not 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 not found in the character string pointed to by src .
Example
The output below was obtained using clang (libc++).
Run this code
#include <cwchar> #include <iostream> #include <locale> int main() { wchar_t dest[] = L"白猫 黑狗 甲虫"; // └───┐ const wchar_t* src = L"甲虫,黑狗"; const std::size_t len = std::wcscspn(dest, src); dest[len] = L'\0'; // terminates the segment to print it out std::wcout.imbue(std::locale("en_US.utf8")); std::wcout << L"The length of maximum initial segment is " << len << L".\n"; std::wcout << L"The segment is \"" << dest << L"\".\n"; }
Possible output:
The length of maximum initial segment is 3. The segment is "白猫 ".
See also
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returns the length of the maximum initial segment that consists
of only the wide characters found in another wide string (function) |
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finds the first location of any wide character in one wide string, in another wide string
(function) |
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C documentation
for
wcscspn
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