On 12/31/2014 8:19 PM, Laeeth Isharc wrote:
Argh - no way to edit.What's best practice here? D strings are not null-terminated. === cpling.c char* cpling(char *s) { s[0]='!'; return s; } === dcaller.d extern(C) char* cpling(char* s); void callC() { writefln("%s",fromStringz(cpling("hello\0"))); } or void callC() { writefln("%s",fromStringz(cpling(toStringz("hello")))); } === am I missing a better way to do this?
String literals are always null-terminated. You can typically pass them as-is and D will do the right thing (you can also pass "MyStr".ptr if you want). Use toStringz when the string came from an external source (read from a file, passed into a function and so on), since you can't be sure if it was a literal or not. toStringz will recognize if it has a null-terminator and will not do anything if it does.
Also, you should make sure to consider std.conv.to on any C strings returned into D if you are going to keep them around. fromStringz only creates a slice, which is fine for how you use it here, but could get you into trouble if you aren't careful. std.conv.to will allocate a new string.
