STRFIND(3GEN) String Pattern-Matching Library Functions STRFIND(3GEN)

NAME

strfind, strrspn, strtrns, str - 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.

USAGE

When compiling multithreaded applications, the _REENTRANT flag must
be defined on the compile line. This flag should only be used in
multithreaded applications.

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 lower case to upper case */
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)

March 10, 2023 STRFIND(3GEN)