ref: 50c1c9eeaadb2d41ce4c5feadfc211ec75e03c1d
dir: /libstd/strstrip.myr/
use "types.use"
use "utf.use"
use "chartype.use"
pkg std =
const strstrip : (str : byte[:] -> byte[:])
const strfstrip : (str : byte[:] -> byte[:])
const strrstrip : (str : byte[:] -> byte[:])
;;
/* strip blanks from both head and tail of str */
const strstrip = {str
-> strrstrip(strfstrip(str))
}
/* strip forward on str */
const strfstrip = {str
var c
for c = decode(str); isblank(c); c = decode(str)
str = str[charlen(c):]
;;
-> str
}
/* strip reverse on str */
const strrstrip = {str
var i
var end
/* scan backwards for start of utf8 char */
end = str.len
for i = str.len; i != 0; i--
if str[i] & 0x80 == 0
if !isspace(decode(str[i-1:]))
goto donestrip
;;
end = i - 1
;;
;;
:donestrip
-> str[:end]
}