str(S)

str: strfind, strrspn, strtrns -- string manipulations

Syntax

   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 str, const char old, const char new,
       char result);

Description

strfind returns the offset of the second string, as2, if it is a substring of string as1.

strrspn returns a pointer to the first character in the string to be trimmed (all characters from the first character to the end of string are in tc).

strtrns transforms str 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.

Return values

If the second string is not a substring of the first string strfind returns -1.

Examples

   / find pointer to substring "hello" in 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);

Standards conformance