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|
use std
use "bio"
pkg bio =
/* unsigned big endian */
generic getbe8 : (f : file# -> status(@a::(numeric,integral)))
generic getbe16 : (f : file# -> status(@a::(numeric,integral)))
generic getbe32 : (f : file# -> status(@a::(numeric,integral)))
generic getbe64 : (f : file# -> status(@a::(numeric,integral)))
/* signed big endian */
generic getle8 : (f : file# -> status(@a::(numeric,integral)))
generic getle16 : (f : file# -> status(@a::(numeric,integral)))
generic getle32 : (f : file# -> status(@a::(numeric,integral)))
generic getle64 : (f : file# -> status(@a::(numeric,integral)))
;;
/*
reads a single integer-like value to the output stream, in
little endian format
*/
generic getle = {f, n -> status(@a::(numeric,integral))
var v, i
v = 0
match ensureread(f, n)
| `Eof: -> `Eof
| `Err e : -> `Err e
| `Ok _:
for i = 0; i < n; i++
v |= (f.rbuf[f.rstart++] : uint64) << (8*(i : uint64))
;;
-> `Ok (v : @a::(numeric,integral))
;;
}
/*
reads a single integer-like value to the output stream, in
big endian format
*/
generic getbe = {f, n -> status(@a::(numeric,integral))
var v, i
v = 0
match ensureread(f, n)
| `Eof: -> `Eof
| `Err e : -> `Err e
| `Ok _:
for i = 0; i < n; i++
v <<= 8
v |= (f.rbuf[f.rstart++] : uint64)
;;
-> `Ok (v : @a::(numeric,integral))
;;
}
generic getbe8 = {f; -> getbe(f, 1)}
generic getbe16 = {f; -> getbe(f, 2)}
generic getbe32 = {f; -> getbe(f, 4)}
generic getbe64 = {f; -> getbe(f, 8)}
generic getle8 = {f; -> getle(f, 1)}
generic getle16 = {f; -> getle(f, 2)}
generic getle32 = {f; -> getle(f, 4)}
generic getle64 = {f; -> getle(f, 8)}
|
