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strcspn

NEAR SYNTAX: unsigned int _n_strcspn( char * s1, char * s2 );

FAR SYNTAX: size_t _f_strcspn( char far * s1, char far * s2 );

NOTE	By default, strcspn() is defined to _n_strcpsn().

Description

Scans a string for the occurrence of any of the characters in another string.

For Rabbit 4000+ users, this function supports FAR pointers. By default the near version of the function is called. The macro USE_FAR_STRING will change all calls to functions in this library to their far versions. The user may also explicitly call the far version with _f_strfunc where strfunc is the name of the string function.

Because FAR addresses are larger, the far versions of this function will run slightly slower than the near version. To explicitly call the near version when the USE_FAR_STRING macro is defined and all pointers are near pointers, append _n_ to the function name, e.g., _n_strfunc. For more information about FAR pointers, see the Dynamic C User's Manual or the samples in Samples/Rabbit4000/FAR/.

Parameters

s1

String to be scanned.

s2

Character occurrence string.

Return value

Returns the position (less one) of the first occurrence of a character in s1 that matches any character in s2.

Library

STRING.LIB

See also

strchr, strrchr, strtok