diff options
Diffstat (limited to 'lib/ur/json.ur')
| -rw-r--r-- | lib/ur/json.ur | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/lib/ur/json.ur b/lib/ur/json.ur index 9288a6dd..1e3e3f39 100644 --- a/lib/ur/json.ur +++ b/lib/ur/json.ur @@ -46,10 +46,14 @@ fun escape s = let val ch = String.sub s 0 in - (if ch = #"\"" || ch = #"\\" then - "\\" ^ String.str ch - else - String.str ch) ^ esc (String.suffix s 1) + (case ch of + #"\n" => "\\n" + | #"\r" => "\\r" + | #"\t" => "\\t" + | #"\"" => "\\\"" + | #"\'" => "\\\'" + | x => String.str ch + ) ^ esc (String.suffix s 1) end in "\"" ^ esc s @@ -90,7 +94,15 @@ fun unescape s = if i+1 >= len then error <xml>JSON unescape: Bad escape sequence: {[s]}</xml> else - String.str (String.sub s (i+1)) ^ unesc (i+2) + (case String.sub s (i+1) of + #"n" => "\n" + | #"r" => "\r" + | #"t" => "\t" + | #"\"" => "\"" + | #"\'" => "\'" + | x => error <xml>JSON unescape: Bad escape char: {[x]}</xml>) + ^ + unesc (i+2) | _ => String.str ch ^ unesc (i+1) end in |