The difference in string and char[], readf() and scanf()

anonymous via Digitalmars-d-learn digitalmars-d-learn at puremagic.com
Sat Mar 21 13:06:24 PDT 2015


On Saturday, 21 March 2015 at 15:05:56 UTC, Ivan Kazmenko wrote:
> Generate a 100000-character string:
> -----
> import std.range, std.stdio;
> void main () {'a'.repeat (100000).writeln;}
> -----
>
> Try to copy it with D scanf and printf:
> -----
> import std.stdio;
> void main () {
> 	char [100000] a;
> 	scanf ("%s", a.ptr);
> 	printf ("%s\n", a.ptr);
> }
> -----
>
> Only 32767 first characters of the string are actually copied.

That doesn't happen on linux, but I could reproduce it in wine. 
Seems to be a bug in the C runtime (snn.lib). I filed an issue:
https://issues.dlang.org/show_bug.cgi?id=14315


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