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digitalmars.D.learn - how to get the \uxxxx unicode code from a char

reply "jicman" <jicman cinops.xerox.com> writes:
Greetings.

Imagine this code,

char[] s = "ABCabc";
foreach (char c; s)
{
   // how do I convert c to something an Unicode code? ie. \u9999.

}

thanks.
Oct 14 2014
next sibling parent reply "Sean Kelly" <sean invisibleduck.org> writes:
On Tuesday, 14 October 2014 at 19:47:00 UTC, jicman wrote:

 Greetings.

 Imagine this code,

 char[] s = "ABCabc";
 foreach (char c; s)
 {
   // how do I convert c to something an Unicode code? ie. 
 \u9999.

 }


I'd look at the JSON string encoder.
Oct 14 2014
parent reply "jicman" <jicman cinops.xerox.com> writes:
On Tuesday, 14 October 2014 at 19:49:16 UTC, Sean Kelly wrote:

 On Tuesday, 14 October 2014 at 19:47:00 UTC, jicman wrote:

 Greetings.

 Imagine this code,

 char[] s = "ABCabc";
 foreach (char c; s)
 {
  // how do I convert c to something an Unicode code? ie. 
 \u9999.

 }


 I'd look at the JSON string encoder.


JSON?  What does JSON has to do with my basic D? :-) No thanks. 
:-)
Oct 14 2014
parent reply "Brad Anderson" <eco gnuk.net> writes:
On Tuesday, 14 October 2014 at 20:03:37 UTC, jicman wrote:

 On Tuesday, 14 October 2014 at 19:49:16 UTC, Sean Kelly wrote:

 On Tuesday, 14 October 2014 at 19:47:00 UTC, jicman wrote:

 Greetings.

 Imagine this code,

 char[] s = "ABCabc";
 foreach (char c; s)
 {
 // how do I convert c to something an Unicode code? ie. 
 \u9999.

 }


 I'd look at the JSON string encoder.


 JSON?  What does JSON has to do with my basic D? :-) No thanks. 
 :-)


Sean's saying that the JSON encoder does the same thing so you 
can look there for how to do it.

https://github.com/D-Programming-Language/phobos/blob/master/std/json.d#L579
Oct 14 2014
parent reply "Brad Anderson" <eco gnuk.net> writes:
On Tuesday, 14 October 2014 at 20:05:07 UTC, Brad Anderson wrote:

 https://github.com/D-Programming-Language/phobos/blob/master/std/json.d#L579


Oops. Linked the the parser section. I actually don't see any 
unicode escape encoder in here. Perhaps he meant the upcoming 
JSON module.
Oct 14 2014
next sibling parent reply "Brad Anderson" <eco gnuk.net> writes:
On Tuesday, 14 October 2014 at 20:08:03 UTC, Brad Anderson wrote:

 On Tuesday, 14 October 2014 at 20:05:07 UTC, Brad Anderson 
 wrote:

 https://github.com/D-Programming-Language/phobos/blob/master/std/json.d#L579


 Oops. Linked the the parser section. I actually don't see any 
 unicode escape encoder in here. Perhaps he meant the upcoming 
 JSON module.


Here we go.

https://github.com/s-ludwig/std_data_json/blob/4ecb90626055269f4897902404741f1173fb5e8e/source/stdx/data/json/generator.d#L451

Sönke's is pretty sophisticated. You could probably just use the 
non-surrogate supporting simple branch.
Oct 14 2014
parent "jicman" <jicman cinops.xerox.com> writes:
On Tuesday, 14 October 2014 at 20:13:17 UTC, Brad Anderson wrote:

 On Tuesday, 14 October 2014 at 20:08:03 UTC, Brad Anderson 
 wrote:

 On Tuesday, 14 October 2014 at 20:05:07 UTC, Brad Anderson 
 wrote:

 https://github.com/D-Programming-Language/phobos/blob/master/std/json.d#L579


 Oops. Linked the the parser section. I actually don't see any 
 unicode escape encoder in here. Perhaps he meant the upcoming 
 JSON module.


 Here we go.

 https://github.com/s-ludwig/std_data_json/blob/4ecb90626055269f4897902404741f1173fb5e8e/source/stdx/data/json/generator.d#L451

 Sönke's is pretty sophisticated. You could probably just use 
 the non-surrogate supporting simple branch.


thanks.  the problem is that I am still in D1. ;-)  over 300K 
lines of code and growing...
Oct 14 2014
prev sibling parent "Sean Kelly" <sean invisibleduck.org> writes:
On Tuesday, 14 October 2014 at 20:08:03 UTC, Brad Anderson wrote:

 On Tuesday, 14 October 2014 at 20:05:07 UTC, Brad Anderson 
 wrote:

 https://github.com/D-Programming-Language/phobos/blob/master/std/json.d#L579


 Oops. Linked the the parser section. I actually don't see any 
 unicode escape encoder in here. Perhaps he meant the upcoming 
 JSON module.


Wow... the current std.json doesn't do string encoding?  I knew
it was bad, but...

In any case, yes, I mentioned JSON because strings are supposed
to be encoded exactly the way you're asking.  It was easier to
point at that than try to outline the process explicitly.
Oct 16 2014
prev sibling parent reply ketmar via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:
On Tue, 14 Oct 2014 19:46:57 +0000
jicman via Digitalmars-d-learn <digitalmars-d-learn puremagic.com>
wrote:


 char[] s =3D "ABCabc";
 foreach (char c; s)
 {
    // how do I convert c to something an Unicode code? ie. \u9999.
=20
 }


  string res;
  foreach (dchar ch; s) res ~=3D "\\u%04X".format(ch);
  // here we have the result in res

note "dchar" instead of "char". with "dchar" foreach() does utf-8
decoding (as 's' is in utf-8).
Oct 14 2014
parent reply "jicman" <jicman cinops.xerox.com> writes:
On Tuesday, 14 October 2014 at 19:56:29 UTC, ketmar via 
Digitalmars-d-learn wrote:

 On Tue, 14 Oct 2014 19:46:57 +0000
 jicman via Digitalmars-d-learn 
 <digitalmars-d-learn puremagic.com>
 wrote:


 char[] s = "ABCabc";
 foreach (char c; s)
 {
    // how do I convert c to something an Unicode code? ie. 
 \u9999.
 
 }


   string res;
   foreach (dchar ch; s) res ~= "\\u%04X".format(ch);
   // here we have the result in res

 note "dchar" instead of "char". with "dchar" foreach() does 
 utf-8
 decoding (as 's' is in utf-8).


Thanks.  This is a missing function in std.uni or std.string.

josé
Oct 14 2014
parent =?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:
On 10/14/2014 01:18 PM, jicman wrote:


 Thanks.  This is a missing function in std.uni or std.string.

 josé


I don't know D1 but there is std.utf.decode:

   http://dlang.org/phobos/std_utf.html#decode

Ali
Oct 14 2014