diff options
Diffstat (limited to 'byte.txi')
-rw-r--r-- | byte.txi | 16 |
1 files changed, 16 insertions, 0 deletions
@@ -16,6 +16,7 @@ character sets. These functions abstract the notion of a @dfn{byte}. zero-origin indexing. @end defun + @deffn {Procedure} byte-set! bytes k byte @var{k} must be a valid index of @var{bytes}, and @var{byte} must be a small @@ -23,6 +24,7 @@ nonnegative integer. @code{byte-set!} stores @var{byte} in element @var{k} of @ returns an unspecified value. @c <!> @end deffn + @defun make-bytes k byte @@ -32,28 +34,33 @@ given, then all elements of the byte-array are initialized to @var{byte}, otherwise the contents of the byte-array are unspecified. @end defun + @defun bytes-length bytes @code{bytes-length} returns length of byte-array @var{bytes}. @end defun + @defun bytes byte @dots{} Returns a newly allocated byte-array composed of the small nonnegative arguments. @end defun + @defun bytes->list bytes @code{bytes->list} returns a newly allocated list of the bytes that make up the given byte-array. @end defun + @defun list->bytes bytes @code{list->bytes} returns a newly allocated byte-array formed from the small nonnegative integers in the list @var{bytes}. @end defun + @noindent @code{Bytes->list} and @code{list->bytes} are inverses so far as @code{equal?} is concerned. @@ -65,16 +72,19 @@ nonnegative integers in the list @var{bytes}. Returns a newly allocated copy of the given @var{bytes}. @end defun + @deffn {Procedure} bytes-reverse! bytes Reverses the order of byte-array @var{bytes}. @end deffn + @defun bytes-reverse bytes Returns a newly allocated bytes-array consisting of the elements of @var{bytes} in reverse order. @end defun + @noindent @cindex binary Input and output of bytes should be with ports opened in @dfn{binary} @@ -96,6 +106,7 @@ be omitted, in which case it defaults to the value returned by @findex current-output-port @end defun + @defun read-byte port @@ -106,6 +117,7 @@ end-of-file object is returned. @var{port} may be omitted, in which case it defaults to the value returned by @code{current-input-port}. @findex current-input-port @end defun + @noindent When reading and writing binary numbers with @code{read-bytes} and @code{write-bytes}, the sign of the length argument determines the @@ -135,6 +147,7 @@ end-of-file. by @code{current-input-port}. @end defun + @defun write-bytes bytes n port @@ -147,6 +160,7 @@ value. @var{port} may be omitted, in which case it defaults to the value returned by @code{current-output-port}. @end defun + @noindent @code{substring-read!} and @code{substring-write} provide lower-level procedures for reading and writing blocks of bytes. The @@ -166,6 +180,7 @@ read from @var{port}. The first byte read is stored at index @var{string}. by @code{current-input-port}. @end deffn + @defun substring-write string start end port @@ -177,3 +192,4 @@ returns the number of bytes written. @var{port} may be omitted, in which case it defaults to the value returned by @code{current-output-port}. @end defun + |