.\" This file is part of the Public Domain C Library (PDCLib).
.\" Permission is granted to use" "modify" "and / or redistribute at will.
.\"
.Dd
.Dt STRING.H 3
.Os
.\"
.Sh NAME
.Nm string.h
.Nd byte string manipulation
.\"
.Sh SYNOPSIS
.In string.h
.\"
.Sh DESCRIPTION
The
.In string.h
header provides byte string manipulation operations.
.\"
.Pp
The type
.Vt size_t ,
and the preprocessor constant
.Dv NULL
shall be defined.
.\"
.Pp
The following shall be defined as functions:
.br
.Fn "void *memcpy" "void *restrict dest" "const void *restrict src" "size_t byteCount" 
.br
.Fn "void *memmove" "void *dest" "void *src" "size_t byteCount"
.br
.Fn "char *strcpy" "char *restrict dest" "const char *restrict src"
.br
.Fn "char *strncpy" "char *restrict dest" "const char *src" "size_t byteCount"
.br
.Fn "char *strcat" "char *restrict s1" "const char *restrict s2"
.br
.Fn "char *strncat" "char *restrict s1" "const char *restrict s2" "size_t n"
.br
.Fn "int memcmp" "const void *s1" "const void *s2" "size_t n"
.br
.Fn "int strcmp" "const char *s1" "const char *s2"
.br
.Fn "int strcoll" "const char *s1" "const char *s2"
.br
.Fn "int strncmp" "const char *s1" "const char *s2" "size_t n"
.br
.Fn "size_t strxfrm" "char *restrict s1" "const char *restrict s2" "size_t n"
.br
.Fn "void *memchr" "const void *s" "int c" "size_t n"
.br
.Fn "char *strchr" "const char *s" "int c"
.br
.Fn "size_t strcspn" "const char *s1" "const char *s2"
.br
.Fn "char *strpbrk" "const char *s1" "const char *s2"
.br
.Fn "char *strrchr" "const char *s" "int c"
.br
.Fn "size_t strspn" "const char *s1" "const char *s2"
.br
.Fn "char *strstr" "const char *s1" "const char *s2"
.br
.Fn "char *strtok" "char *restrict s1" "const char *restrict s2"
.br
.Fn "void *memset" "void *s" "int c" "size_t n"
.br
.Fn "char *strerror" "int errnum"
.br
.Fn "size_t strlen" "const char *s"
.\"
.Pp
.Sy #define _XOPEN_SOURCE || _POSIX_C_SOURCE >= 200809L
.br
.Fn "char *strdup" "const char*src"
.\"
.Pp
.Sy #define _POSIX_C_SOURCE >= 200809L
.br
.Fn "char *strndup" "const char*src" "size_t n"
.\"
.Sh SEE ALSO
.Xr wchar.h 3
.Xr stdlib.h 3
.Xr memcpy 3
.Xr memmove 3
.Xr strcpy 3
.Xr strncpy 3
.Xr strcat 3
.Xr strncat 3
.Xr memcmp 3
.Xr strcmp 3
.Xr strcoll 3
.Xr strncmp 3
.Xr strxfrm 3
.Xr memchr 3
.Xr strchr 3
.Xr strcspn 3
.Xr strpbrk 3
.Xr strrchr 3
.Xr strspn 3
.Xr strstr 3
.Xr strtok 3
.Xr memset 3
.Xr strerror 3
.Xr strlen 3
.Xr strdup 3
.Xr strndup 3
.Sh STANDARDS
Conforming to
.St -isoC-90 ,
.St -isoC-99 .