Returns the length of the prefix of a string that consists entirely
of characters not in a specified set of characters.
Format
#include <string.h>
size_t strcspn (const char *str, const char
*charset);
Arguments
- str
- A pointer to a character string. If this character string is a
null string, 0 is returned.
- charset
- A pointer to a character string containing the set of
characters.
Description
This function scans the characters in the string, stops when
it encounters a character found in charset, and returns
the length of the string's initial segment formed by characters not
found in charset.
If none of the characters match in the character strings pointed to
by str and charset, strcspn returns the length of
string.
Return Value
| x | The length of the
segment. |
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