Thanks for all the comments! The string (with escape sequences) is user
defined, so I need to expand the escape sequences during runtime, not
compile time. I was hoping for a standard function, but it appears it may
not exist. I'll adapt the below provided function (adding output length
limit) and use it.

THANKS!

Harold



> Was just thinking it a bit further: Do you have a non pre-compiled string=
?
> Aka:
>
> char * OrigString =3D "This\\tis\\rinteresting";  ?
>
> (notice the double backslashes)
>
> Then you probably would need a conversion function, similar to this:
>
>     char *o =3D OrigStr;
>     char *s =3D StringBuf;
>     while ( *o ) {
>         char c =3D *o++;
>         if ( c =3D=3D '\\' ) {
>             c =3D *o++;
>             switch(c) {
>                 case '\0': break;
>                 case 't': c =3D '\t'; break;
>                 case 'n': c =3D '\r'; break;
>                 case 'r': c =3D '\n'; break;
>                 case 'a': c =3D '\a'; break;
>                 default: break;
>             }
>
>             *s++ =3D c;
>         }
>     }
>     *s =3D '\0';
>
> (have not tested and it is definitely _unsafe_ -- for illustration purpos=
e
> only)
>
> Tamas
>
>
>
> On 13 May 2013 22:55, Tamas Rudnai <tamas.rudnai@gmail.com> wrote:
>
>> Have you tried in this way:
>>
>> sprintf(StringBuf, "%s", OriginalString);
>>
>> Tamas
>>
>>
>> On 13 May 2013 20:06, Harold Hallikainen <harold@hallikainen.org> wrote:
>>
>>> I have a string, defined at run time, that includes standard printf
>>> escape
>>> sequences (such as \t and \r). I'd like to change these back to tab and
>>> carriage return. I tried using sprintf(StringBuf,OriginalString), but
>>> this
>>> just copied OriginalString to StringBuf without expanding the escape
>>> sequences. I note that the "format string" is defined as const char, so
>>> I
>>> guess it is evaluated at compile time instead of run time (especially
>>> to
>>> deal with a variable number of % substitutions). So, is there a
>>> standard
>>> function to expand out the escape sequences in a run-time defined
>>> string?
>>> Or do I have to write my own?
>>>
>>> THANKS!
>>>
>>> Harold
>>>
>>>
>>>
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>>>
>>
>>
>>
>> --
>> int main() { char *a,*s,*q; printf(s=3D"int main() { char *a,*s,*q;
>> printf(s=3D%s%s%s, q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }",
>> q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); }
>>
>
>
>
> --
> int main() { char *a,*s,*q; printf(s=3D"int main() { char *a,*s,*q;
> printf(s=3D%s%s%s, q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }",
> q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); }
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> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
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>


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