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|
type t = Basis.string
val str = Basis.str1
val length = Basis.strlen
val lengthGe = Basis.strlenGe
val append = Basis.strcat
val sub = Basis.strsub
val suffix = Basis.strsuffix
val index = Basis.strindex
fun sindex r = Basis.strsindex r.Haystack r.Needle
val atFirst = Basis.strchr
fun mindex {Haystack = s, Needle = chs} =
let
val n = Basis.strcspn s chs
in
if n >= length s then
None
else
Some n
end
fun substring s {Start = start, Len = len} = Basis.substring s start len
fun seek s ch =
case index s ch of
None => None
| Some i => Some (suffix s (i + 1))
fun mseek {Haystack = s, Needle = chs} =
case mindex {Haystack = s, Needle = chs} of
None => None
| Some i => Some (sub s i, suffix s (i + 1))
fun split s ch =
case index s ch of
None => None
| Some i => Some (substring s {Start = 0, Len = i},
suffix s (i + 1))
fun split' s ch =
case index s ch of
None => None
| Some i => Some (substring s {Start = 0, Len = i},
suffix s i)
fun msplit {Haystack = s, Needle = chs} =
case mindex {Haystack = s, Needle = chs} of
None => None
| Some i => Some (substring s {Start = 0, Len = i},
sub s i,
suffix s (i + 1))
fun ssplit r =
case sindex r of
None => None
| Some i => Some (substring r.Haystack {Start = 0, Len = i},
suffix r.Haystack (i + length r.Needle))
fun all f s =
let
val len = length s
fun al i =
i >= len
|| (f (sub s i) && al (i + 1))
in
al 0
end
fun mp f s =
let
fun mp' i acc =
if i < 0 then
acc
else
mp' (i - 1) (str (f (sub s i)) ^ acc)
in
mp' (length s - 1) ""
end
fun newlines [ctx] [[Body] ~ ctx] (s : string) : xml ([Body] ++ ctx) [] [] =
case split s #"\n" of
None => cdata s
| Some (s1, s2) => <xml>{[s1]}<br/>{newlines s2}</xml>
fun isPrefix {Full = f, Prefix = p} =
length f >= length p && substring f {Start = 0, Len = length p} = p
fun trim s =
let
val len = length s
fun findStart i =
if i < len && isspace (sub s i) then
findStart (i+1)
else
i
fun findFinish i =
if i >= 0 && isspace (sub s i) then
findFinish (i-1)
else
i
val start = findStart 0
val finish = findFinish (len - 1)
in
if finish >= start then
substring s {Start = start, Len = finish - start + 1}
else
""
end
|
