url, twtstr: correct number parsing

* do not use std's parse*Int; they accept weird stuff that we do not
  want to accept in any case
* fix bug in parseHost where a parseIpv4 failure would result in an
  empty host
* do not use isDigit, isAlphaAscii
* improve parse*IntImpl error handling

1 files changed, 1 insertions, 0 deletions

diff --git a/src/utils/charcategory.nim b/src/utils/charcategory.nim
index 55cbb930..e2c2a045 100644
--- a/src/utils/charcategory.nim
+++ b/src/utils/charcategory.nim
@@ -7,5 +7,6 @@ const AsciiAlpha* = (AsciiUpperAlpha + AsciiLowerAlpha)
 const NonAscii* = {char(0x80)..char(0xFF)}
 const AsciiDigit* = {'0'..'9'}
 const AsciiAlphaNumeric* = AsciiAlpha + AsciiDigit
+const AsciiOctDigit* = {'0'..'7'}
 const AsciiHexDigit* = (AsciiDigit + {'a'..'f', 'A'..'F'})
 const AsciiWhitespace* = {' ', '\n', '\r', '\t', '\f'}