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# new type to help incrementally read strings
container stream [
index:number
data:address:array:character
]
recipe new-stream [
local-scope
result:address:stream <- new stream:type
i:address:number <- get-address *result, index:offset
*i <- copy 0
d:address:address:array:character <- get-address *result, data:offset
*d <- next-ingredient
reply result
]
recipe rewind-stream [
local-scope
in:address:stream <- next-ingredient
x:address:number <- get-address *in, index:offset
*x <- copy 0
reply in/same-as-arg:0
]
recipe read-line [
local-scope
in:address:stream <- next-ingredient
idx:address:number <- get-address *in, index:offset
s:address:array:character <- get *in, data:offset
next-idx:number <- find-next s, 10/newline, *idx
result:address:array:character <- string-copy s, *idx, next-idx
*idx <- add next-idx, 1 # skip newline
reply result
]
recipe end-of-stream? [
local-scope
in:address:stream <- next-ingredient
idx:address:number <- get *in, index:offset
s:address:array:character <- get *in, data:offset
len:number <- length *s
result:boolean <- greater-or-equal idx, len
reply result
]
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