получить длину подстроки (get length of a substring)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
strspn — get length of a substring
Синопсис (Synopsis)
#include <string.h>
size_t strspn(const char *s1, const char *s2);
Описание (Description)
The functionality described on this reference page is aligned
with the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
The strspn() function shall compute the length (in bytes) of the
maximum initial segment of the string pointed to by s1 which
consists entirely of bytes from the string pointed to by s2.
Возвращаемое значение (Return value)
The strspn() function shall return the computed length; no return
value is reserved to indicate an error.
Ошибки (Error)
No errors are defined.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
strcspn(3p)
The Base Definitions volume of POSIX.1‐2017, string.h(0p)
