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* lib/net/imap.rb (decode_utf7): new method.

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* lib/net/imap.rb (encode_utf7): new method.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3773 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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shugo 2003-05-10 07:19:35 +00:00
parent 55f4dc4c9a
commit afb9ea97ea
2 changed files with 151 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
Sat May 10 16:17:02 2003 Shugo Maeda <shugo@ruby-lang.org>
* lib/net/imap.rb (decode_utf7): new method.
* lib/net/imap.rb (encode_utf7): new method.
Fri May 9 16:38:30 2003 Yukihiro Matsumoto <matz@ruby-lang.org>
* io.c (rb_io_reopen): It should be possible to reopen closed IO.

145
lib/net/imap.rb
View file

@ -1063,6 +1063,32 @@ module Net
return thread_internal("UID THREAD", argorithm, search_keys, charset)
end
def self.decode_utf7(s)
return s.gsub(/&(.*?)-/n) {
if $1.empty?
"&"
else
base64 = $1.tr(",", "/")
x = base64.length % 4
if x > 0
base64.concat("=" * (4 - x))
end
u16tou8(base64.unpack("m")[0])
end
}
end
def self.encode_utf7(s)
return s.gsub(/(&)|([^\x20-\x25\x27-\x7e]+)/n) { |x|
if $1
"&-"
else
base64 = [u8tou16(x)].pack("m")
"&" + base64.delete("=\n").tr("/", ",") + "-"
end
}
end
private
CRLF = "\r\n"
@ -1352,6 +1378,125 @@ module Net
end
end
def self.u16tou8(s)
len = s.length
if len < 2
return ""
end
buf = ""
i = 0
while i < len
c = s[i] << 8 | s[i + 1]
i += 2
if c == 0xfeff
next
elsif c < 0x0080
buf.concat(c)
elsif c < 0x0800
b2 = c & 0x003f
b1 = c >> 6
buf.concat(b1 | 0xc0)
buf.concat(b2 | 0x80)
elsif c >= 0xdc00 && c < 0xe000
raise "invalid surrogate detected"
elsif c >= 0xd800 && c < 0xdc00
if i + 2 > len
raise "invalid surrogate detected"
end
low = s[i] << 8 | s[i + 1]
i += 2
if low < 0xdc00 || low > 0xdfff
raise "invalid surrogate detected"
end
c = (((c & 0x03ff)) << 10 | (low & 0x03ff)) + 0x10000
b4 = c & 0x003f
b3 = (c >> 6) & 0x003f
b2 = (c >> 12) & 0x003f
b1 = c >> 18;
buf.concat(b1 | 0xf0)
buf.concat(b2 | 0x80)
buf.concat(b3 | 0x80)
buf.concat(b4 | 0x80)
else # 0x0800-0xffff
b3 = c & 0x003f
b2 = (c >> 6) & 0x003f
b1 = c >> 12
buf.concat(b1 | 0xe0)
buf.concat(b2 | 0x80)
buf.concat(b3 | 0x80)
end
end
return buf
end
private_class_method :u16tou8
def self.u8tou16(s)
len = s.length
buf = ""
i = 0
while i < len
c = s[i]
if (c & 0x80) == 0
buf.concat(0x00)
buf.concat(c)
i += 1
elsif (c & 0xe0) == 0xc0 &&
inlen >= 2 &&
(s[i + 1] & 0xc0) == 0x80
if c == 0xc0 || c == 0xc1
raise format("non-shortest UTF-8 sequence (%02x)", c)
end
u = ((c & 0x1f) << 6) | (s[i + 1] & 0x3f)
buf.concat(u >> 8)
buf.concat(u & 0x00ff)
i += 2
elsif (c & 0xf0) == 0xe0 &&
i + 2 < len &&
(s[i + 1] & 0xc0) == 0x80 &&
(s[i + 2] & 0xc0) == 0x80
if c == 0xe0 && s[i + 1] < 0xa0
raise format("non-shortest UTF-8 sequence (%02x)", c)
end
u = ((c & 0x0f) << 12) | ((s[i + 1] & 0x3f) << 6) | (s[i + 2] & 0x3f)
# surrogate chars
if u >= 0xd800 && u <= 0xdfff
raise format("none-UTF-16 char detected (%04x)", u)
end
buf.concat(u >> 8)
buf.concat(u & 0x00ff)
i += 3
elsif (c & 0xf8) == 0xf0 &&
i + 3 < len &&
(s[i + 1] & 0xc0) == 0x80 &&
(s[i + 2] & 0xc0) == 0x80 &&
(s[i + 3] & 0xc0) == 0x80
if c == 0xf0 && s[i + 1] < 0x90
raise format("non-shortest UTF-8 sequence (%02x)", c)
end
u = ((c & 0x07) << 18) | ((s[i + 1] & 0x3f) << 12) |
((s[i + 2] & 0x3f) << 6) | (s[i + 3] & 0x3f)
if u < 0x10000
buf.concat(u >> 8)
buf.concat(u & 0x00ff)
elsif u < 0x110000
high = ((u - 0x10000) >> 10) | 0xd800
low = (u & 0x03ff) | 0xdc00
buf.concat(high >> 8)
buf.concat(high & 0x00ff)
buf.concat(low >> 8)
buf.concat(low & 0x00ff)
else
raise format("none-UTF-16 char detected (%04x)", u)
end
i += 4
else
raise format("illegal UTF-8 sequence (%02x)", c)
end
end
return buf
end
private_class_method :u8tou16
class RawData
def format_data
return @data