string-copy! - copy from a string into another string
LIBRARY
(import (scheme base)) ;R7RS
SYNOPSIS
(string-copy! to at from)
(string-copy! to at from start)
(string-copy! to at from start end)
DESCRIPTION
Copies the characters of the string
from
between
start
and
end
to the string
to,
starting at
at.
The order in which characters are copied is unspecified, except that
if the source and destination overlap, copying takes place as if the
source is first copied into a temporary string and then into the
destination. This can be achieved without allocating storage by making
sure to copy in the correct direction in such circumstances.
RETURN VALUES
Returns an unspecified value.
EXAMPLES
(define a "12345")
(define b (string-copy "abcde"))
(string-copy! b 1 a 0 2)
b => "a12de"
COMPATIBILITY
This procedure is unique to R7RS.
ERRORS
It is an error if
at
is less than zero or greater than the length
of
to.
It is also an error if
(- (string-length to) at)
is less than
(- end start).
It is also an error if the wrong number arguments was passed or an
argument was outside its domain.
Implementations may signal an error, extend the procedure's
domain of definition to include such arguments,
or fail catastrophically.
SEE ALSO
string-set!(3scm)
STANDARDS
R7RS
HISTORY
This procedure first appeared in R7RS. In R2RS there were the
procedures
substring-move-right!
and
substring-move-left!
that had the same effect.
AUTHORS
This page is part of the
scheme-manpages
project.
It includes materials from the RnRS documents.
More information can be found at
https://github.com/schemedoc/manpages/.
Markup created by unroff 1.0sc, March 04, 2023.