man pages section 3: Extended Library Functions, Volume 2

strfind(3GEN)

Name

strfind, strrspn, strtrns - string manipulations

Synopsis

cc [ flag ... ] file ... –lgen [ library ... ]
#include <libgen.h>

int strfind(const char *as1, const char *as2);

char *strrspn(const char *string, const char *tc);

char * strtrns(const char *string, const char *old,
     const char *new, char *result);

Description

The strfind() function returns the offset of the first occurrence of the second string, as2, if it is a substring of string as1. If the second string is not a substring of the first string strfind() returns −1.

The strrspn() function trims characters from a string. It searches from the end of string for the first character that is not contained in tc. If such a character is found, strrspn() returns a pointer to the next character; otherwise, it returns a pointer to string.

The strtrns() function transforms string and copies it into result. Any character that appears in old is replaced with the character in the same position in new. The new result is returned.

Examples

Example 1 An example of the strfind() function.

/* find offset to substring "hello" within as1 */
i = strfind(as1, "hello");
/* trim junk from end of string */
s2 = strrspn(s1, "*?#$%");
*s2 = '\0';
/* transform lowercase to uppercase */
a1[] = "abcdefghijklmnopqrstuvwxyz";
a2[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
s2 = strtrns(s1, a1, a2, s2);

Attributes

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE MT-Level MT-Safe

See Also

string(3C), attributes(7)