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* string.c (rb_str_inspect): inspect as a dummy encoding string

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when a UTF-16/32 (not BE/LE) string does not have a BOM.
  Unicode and some RFCs say that a string labeld as UTF-16/32
  doesn't have a BOM, it should be considered big endian.
  But many Windows programs generates little endian UTF-16
  strings without a BOM. So String#inspect treats a string
  labeled UTF-16/32 withaout a BOM as a dummy encoding string.
  patched by Martin Duerst. [ruby-core:33461]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29984 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
naruse 2010-11-30 16:47:24 +00:00
parent 87703540b0
commit 05d7d889ea
3 changed files with 38 additions and 4 deletions
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11
ChangeLog
View file

@ -1,3 +1,14 @@
Wed Dec 1 01:29:15 2010 NARUSE, Yui <naruse@ruby-lang.org>
* string.c (rb_str_inspect): inspect as a dummy encoding string
when a UTF-16/32 (not BE/LE) string does not have a BOM.
Unicode and some RFCs say that a string labeld as UTF-16/32
doesn't have a BOM, it should be considered big endian.
But many Windows programs generates little endian UTF-16
strings without a BOM. So String#inspect treats a string
labeled UTF-16/32 withaout a BOM as a dummy encoding string.
patched by Martin Duerst. [ruby-core:33461]
Tue Nov 30 17:04:10 2010 NARUSE, Yui <naruse@ruby-lang.org>
* addr2line.c (parse_debug_line_cu): ignore DW_LNE_set_discriminator.

18
string.c
View file

@ -4214,10 +4214,22 @@ rb_str_inspect(VALUE str)
p = RSTRING_PTR(str); pend = RSTRING_END(str);
prev = p;
if (enc == utf16) {
enc = *p == (char)0xFF ? rb_enc_find("UTF-16LE") : rb_enc_find("UTF-16BE");
const unsigned char *q = (const unsigned char *)p;
if (q[0] == 0xFE && q[1] == 0xFF)
enc = rb_enc_find("UTF-16BE");
else if (q[0] == 0xFF && q[1] == 0xFD)
enc = rb_enc_find("UTF-16LE");
else
unicode_p = 0;
}
else if (enc == utf32) {
enc = *p == (char)0xFF ? rb_enc_find("UTF-32LE") : rb_enc_find("UTF-32BE");
const unsigned char *q = (const unsigned char *)p;
if (q[0] == 0 && q[1] == 0 && q[2] == 0xFE && q[3] == 0xFF)
enc = rb_enc_find("UTF-32BE");
else if (q[3] == 0 && q[2] == 0 && q[1] == 0xFE && q[0] == 0xFF)
enc = rb_enc_find("UTF-32LE");
else
unicode_p = 0;
}
while (p < pend) {
unsigned int c, cc;
@ -6004,7 +6016,6 @@ static VALUE
rb_str_each_codepoint(VALUE str)
{
VALUE orig = str;
long len;
int n;
unsigned int c;
const char *ptr, *end;
@ -6014,7 +6025,6 @@ rb_str_each_codepoint(VALUE str)
RETURN_ENUMERATOR(str, 0, 0);
str = rb_str_new4(str);
ptr = RSTRING_PTR(str);
len = RSTRING_LEN(str);
end = RSTRING_END(str);
enc = STR_ENC_GET(str);
while (ptr < end) {

13
test/ruby/test_m17n.rb
View file

@ -232,6 +232,19 @@ class TestM17N < Test::Unit::TestCase
Encoding.default_external = orig_ext
end
def test_utf_16_32_inspect
str = "\u3042"
%w/UTF-16 UTF-32/.each do |enc|
%w/BE LE/.each do |endian|
s = str.encode(enc + endian)
# When a UTF-16/32 string doesn't have a BOM,
# inspect as a dummy encoding string.
assert_equal(s.dup.force_encoding("ISO-2022-JP").inspect,
s.dup.force_encoding(enc).inspect)
end
end
end
def test_str_dump
[
e("\xfe"),