memchr(3) [freebsd man page]

MEMCHR(3)						   BSD Library Functions Manual 						 MEMCHR(3)

NAME

     memchr -- locate byte in byte string

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <string.h>

     void *
     memchr(const void *b, int c, size_t len);

     void *
     memrchr(const void *b, int c, size_t len);

DESCRIPTION

     The memchr() function locates the first occurrence of c (converted to an unsigned char) in string b.

     The memrchr() function behaves like memchr(), except that it locates the last occurrence of c in string b.

RETURN VALUES

     The memchr() and memrchr() functions return a pointer to the byte located, or NULL if no such byte exists within len bytes.

SEE ALSO

     memmem(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3), wmemchr(3)

STANDARDS

     The memchr() function conforms to ISO/IEC 9899:1990 (``ISO C90'').

     The memrchr() function is a GNU extension and conforms to no standard.

HISTORY

     The memrchr() function first appeared in GNU libc 2.1.91, this implementation first appeared in FreeBSD 6.4, coming from OpenBSD 4.3.

BSD
								   April 9, 2008							       BSD

MEMCHR(3)						     Linux Programmer's Manual							 MEMCHR(3)

NAME

       memchr, memrchr - scan memory for a character

SYNOPSIS

       #include <string.h>

       void *memchr(const void *s, int c, size_t n);

       void *memrchr(const void *s, int c, size_t n);

DESCRIPTION

       The  memchr()  function	scans the first n bytes of the memory area pointed to by s for the character c.  The first byte to match c (inter-
       preted as an unsigned character) stops the operation.

       The memrchr() function is like the memchr() function, except that it searches backwards from the end of the n bytes pointed to by s instead
       of forwards from the front.

RETURN VALUE

       The  memchr()  and  memrchr()  functions  return a pointer to the matching byte or NULL if the character does not occur in the given memory
       area.

CONFORMING TO

       The memchr() function conforms to SVID 3, BSD 4.3, ISO 9899, POSIX.  The memrchr() function is  a  GNU  extension,  available  since  glibc
       2.1.91.

SEE ALSO

       index(3), rindex(3), strchr(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3)

GNU
								    2002-02-20								 MEMCHR(3)