C-api: rb_str_new

ruby-talk
1

Hello,

I have trouble using rb_str_new[2] and German umlauts.
The umlauts will be escaped:

c program:
static VALUE test(VALUE self, VALUE word) {
char *str = STR2CSTR(word);
printf(“got: %s\n”, str);
return rb_str_new2(str);
}

from ruby:
p foo.test(“Fälschung”)

will print:
got: Fälschung
“F\344lschung”

Both worlds (c and ruby) handle the string correctly, but
the translation fails.
Do I have to adjust the encoding? Some idea?

Best regards,
Matthias

···

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2

Hi,

from ruby:
p foo.test(“F�älschung”)

will print:
got: F�älschung
“F\344lschung”

Both worlds (c and ruby) handle the string correctly, but
the translation fails.
Do I have to adjust the encoding? Some idea?

I need more info. The string from test is shorter than the original?
I guess it should print

will print:
got: F�älschung
“F\201\344lschung”

I don’t know yet why \201 was dropped (due to String#inspect escaping).

						matz.
···

In message “c-api: rb_str_new” on 02/08/28, Matthias Veit matthias_veit@yahoo.de writes:

3

Hi,

“Matthias Veit” matthias_veit@yahoo.de wrote in message
news:20020828021424.20f202ee.matthias_veit@yahoo.de…

Hello,

I have trouble using rb_str_new[2] and German umlauts.
The umlauts will be escaped:

c program:
static VALUE test(VALUE self, VALUE word) {
char *str = STR2CSTR(word);
printf(“got: %s\n”, str);
return rb_str_new2(str);
}

from ruby:
p foo.test(“Fälschung”)

will print:
got: Fälschung
“F\344lschung”

Both worlds (c and ruby) handle the string correctly, but
the translation fails.
Do I have to adjust the encoding? Some idea?

Best regards,
Matthias

Try this:

$KCODE = ‘n’
p “F\344lschung”
$KCODE = ‘u’
p “F\344lschung”

Park Heesob

4

Hi,

···

At Wed, 28 Aug 2002 09:18:58 +0900, Matthias Veit wrote:

will print:
got: Fälschung
“F\344lschung”

Just String#inspect shows non-printable characters with escape.
Ruby counts multibyte characters as printable according to the
value of $KCODE, however, latin charsets are not dealt with
good enogh now.

–
Nobu Nakada

5

Hello,

from ruby:
p foo.test(“F�älschung”)
I need more info. The string from test is shorter than the original?
I guess it should print

I used the umlaut, that is false printed. The word was:
foo.test(“F#lschung”) where # is one german umlaut (The length
of the string is 9).

The string returned from test has an escaped umlaut, but the
length of the string is the same: 9.

ruby: (where # is the German umlaut “a” with two points on top)

s=“F#lschung”
t=a.test(s)
p s.length
p t
p t.length

will print:

got: F#lschung
9
“F\344lschung”
9

Best Regards,
Matthias

···

YM == matz@ruby-lang.org (Yukihiro Matsumoto) wrote:

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6

Hi,

···

In message “Re: c-api: rb_str_new” on 02/08/28, Matthias Veit matthias_veit@yahoo.de writes:

I used the umlaut, that is false printed. The word was:
foo.test(“F#lschung”) where # is one german umlaut (The length
of the string is 9).

The string returned from test has an escaped umlaut, but the
length of the string is the same: 9.

So you need to use “print” or “puts” instead of “p”. “p” (and
“inspect”) escapes “non ASCII characters”, such as “a umlaut”.

						matz.