NAME
strchr, strrchr, strchrnul – locate character in string
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <string.h>
QChar *
strchr(QChar *s, int c);
QChar *
strrchr(QChar *s, int c);
QChar *
strchrnul(QChar *s, int c);
DESCRIPTION
The strchr() function locates the first occurrence of c (converted to a char) in the string pointed to by s. The terminating null character is considered part of the string; therefore if c is ‘\0’, the functions locate the terminating ‘\0’.
The strrchr() function is identical to strchr() except it locates the last occurrence of c.
The strchrnul() function is identical to strchr() except that if c is not found in s a pointer to the terminating ‘\0’ is returned.
RETURN VALUES
The functions strchr() and strrchr() return a pointer to the located character, or NULL if the character does not appear in the string.
strchrnul() returns a pointer to the terminating ‘\0’ if the character does not appear in the string.
SEE ALSO
memchr(3), memmem(3), strcspn(3), strpbrk(3), strsep(3), strspn(3), strstr(3), strtok(3), wcschr(3)
STANDARDS
The functions strchr() and strrchr() conform to ISO/IEC 9899:2024 (“ISO C23”), where they are specified as qualifier-preserving functions.
The function strchrnul() is a GNU extension. Like the qualifier-preserving functions in ISO/IEC 9899:2024 (“ISO C23”), FreeBSD implements strchrnul() as qualifier-preserving as well.
HISTORY
The strchrnul() function first appeared in glibc 2.1.1 and was added in FreeBSD 10.0.