cSEP, pp_cSEP,
- stringToC, charToC, pprFSInCStyle,
- charToEasyHaskell
+ pprFSInCStyle, pprStringInCStyle
) where
#include "HsVersions.h"
\begin{code}
pprFSInCStyle :: FAST_STRING -> SDoc
-pprFSInCStyle fs = doubleQuotes (text (stringToC (_UNPK_ fs)))
+-- Assumes it contains only characters '\0'..'\xFF'!
+pprFSInCStyle fs = pprStringInCStyle (_UNPK_ fs)
-stringToC :: String -> String
--- Convert a string to the form required by C in a C literal string
--- Tthe hassle is what to do w/ strings like "ESC 0"...
-stringToC "" = ""
-stringToC [c] = charToC c
-stringToC (c:cs)
- -- if we have something "octifiable" in "c", we'd better "octify"
- -- the rest of the string, too.
- = if (c < ' ' || c > '~')
- then (charToC c) ++ (concat (map char_to_C cs))
- else (charToC c) ++ (stringToC cs)
- where
- char_to_C c | c == '\n' = "\\n" -- use C escapes when we can
- | c == '\a' = "\\a"
- | c == '\b' = "\\b" -- ToDo: chk some of these...
- | c == '\r' = "\\r"
- | c == '\t' = "\\t"
- | c == '\f' = "\\f"
- | c == '\v' = "\\v"
- | otherwise = '\\' : (octify (ord c))
+pprStringInCStyle :: String -> SDoc
+pprStringInCStyle s = doubleQuotes (text (concatMap charToC s))
charToC :: Char -> String
--- Convert a character to the form reqd in a C character literal
-charToC c = if (c >= ' ' && c <= '~') -- non-portable...
- then case c of
- '\'' -> "\\'"
- '\\' -> "\\\\"
- '"' -> "\\\""
- '\n' -> "\\n"
- '\a' -> "\\a"
- '\b' -> "\\b"
- '\r' -> "\\r"
- '\t' -> "\\t"
- '\f' -> "\\f"
- '\v' -> "\\v"
- _ -> [c]
- else '\\' : (octify (ord c))
-
-charToEasyHaskell :: Char -> String
--- Convert a character to the form reqd in a Haskell character literal
-charToEasyHaskell c
- = if (c >= 'a' && c <= 'z')
- || (c >= 'A' && c <= 'Z')
- || (c >= '0' && c <= '9')
- then [c]
- else case c of
- _ -> '\\' : show (ord c)
-
-octify :: Int -> String
-octify n
- = if n < 8 then
- [chr (n + ord '0')]
- else
- octify (n `quot` 8) ++ [chr (n `rem` 8 + ord '0')]
+charToC '\"' = "\\\""
+charToC '\'' = "\\\'"
+charToC '\\' = "\\\\"
+charToC c | c >= ' ' && c <= '~' = [c]
+ | c > '\xFF' = panic ("charToC "++show c)
+ | otherwise = ['\\',
+ chr (ord '0' + ord c `div` 64),
+ chr (ord '0' + ord c `div` 8 `mod` 8),
+ chr (ord '0' + ord c `mod` 8)]
\end{code}
-