I've taken std.mmfile, and been playing with it.

I won't lie, mostly I've just been messing with it.
The idea was originally to fix opDollar for mmfile (which I can push if it will be accepted.)

I turned it into a template for funsies.
And a struct.  For funsies.

And it Works! mostly.

But only if you don't compile with -O.
-release works, -inline works, -noboundscheck works.

heres an example:
---
import std.conv, std.stdio;
void main()
{
    auto mm = mmFile!string("mmTest.d");
    string mt = mm[0..50];
    string ms = mt[0..50];
    string ss = mm.data;

    writeln(mm[0..$]);//prints the entire file.
    writeln(ms);//prints the first 50 characters.

    writeln(mm.data.ptr);//data is the internal string.
    writeln(ms.ptr);//all of these should be equal.
    writeln(mt.ptr);//But this one and the one above are not.
    writeln(ss.ptr);//also nothing gets printed with -O, it segfaults.

    return;
}
--

Here is an example output with rdmd mmTest.d:
//the above file[0..$]
//the about file[0..50]
7F47535F5000
7F47535F5000
7F47535F5000
7F47535F5000

Here is outut with rdmd -O mmTest.d:
�
�
7FEA61B77000
406470
406470
7FEA61B77000

What's up with that?

On 02/10/2013 07:14 PM, 1100110 wrote:
> I've taken std.mmfile, and been playing with it.
>
> I won't lie, mostly I've just been messing with it.
> The idea was originally to fix opDollar for mmfile (which I can push if
> it will be accepted.)
>
> I turned it into a template for funsies.
> And a struct. For funsies.
>
> And it Works! mostly.
>
> But only if you don't compile with -O.
> -release works, -inline works, -noboundscheck works.
>
> heres an example:
> ---
> import std.conv, std.stdio;
> void main()
> {
> auto mm = mmFile!string("mmTest.d");
> string mt = mm[0..50];
> string ms = mt[0..50];
> string ss = mm.data;
>
> writeln(mm[0..$]);//prints the entire file.
> writeln(ms);//prints the first 50 characters.
>
> writeln(mm.data.ptr);//data is the internal string.
> writeln(ms.ptr);//all of these should be equal.
> writeln(mt.ptr);//But this one and the one above are not.
> writeln(ss.ptr);//also nothing gets printed with -O, it segfaults.
>
> return;
> }
> --
>
> Here is an example output with rdmd mmTest.d:
> //the above file[0..$]
> //the about file[0..50]
> 7F47535F5000
> 7F47535F5000
> 7F47535F5000
> 7F47535F5000
>
> Here is outut with rdmd -O mmTest.d:
> �
> �
> 7FEA61B77000
> 406470
> 406470
> 7FEA61B77000
>
> What's up with that?

Found it! I was destroy(class) manually allocated class.
That was my fault. Completely.  I knew I would be embarrassed if I posted this.  =P

I am now in love with cgdb.
Go get it.  It's beautiful.

On 02/10/2013 09:26 PM, 1100110 wrote:
> On 02/10/2013 07:14 PM, 1100110 wrote:
>> I've taken std.mmfile, and been playing with it.
>>
>> I won't lie, mostly I've just been messing with it.
>> The idea was originally to fix opDollar for mmfile (which I can push if
>> it will be accepted.)
>>
>> I turned it into a template for funsies.
>> And a struct. For funsies.
>>
>> And it Works! mostly.
>>
>> But only if you don't compile with -O.
>> -release works, -inline works, -noboundscheck works.
>>
>> heres an example:
>> ---
>> import std.conv, std.stdio;
>> void main()
>> {
>> auto mm = mmFile!string("mmTest.d");
>> string mt = mm[0..50];
>> string ms = mt[0..50];
>> string ss = mm.data;
>>
>> writeln(mm[0..$]);//prints the entire file.
>> writeln(ms);//prints the first 50 characters.
>>
>> writeln(mm.data.ptr);//data is the internal string.
>> writeln(ms.ptr);//all of these should be equal.
>> writeln(mt.ptr);//But this one and the one above are not.
>> writeln(ss.ptr);//also nothing gets printed with -O, it segfaults.
>>
>> return;
>> }
>> --
>>
>> Here is an example output with rdmd mmTest.d:
>> //the above file[0..$]
>> //the about file[0..50]
>> 7F47535F5000
>> 7F47535F5000
>> 7F47535F5000
>> 7F47535F5000
>>
>> Here is outut with rdmd -O mmTest.d:
>> �
>> �
>> 7FEA61B77000
>> 406470
>> 406470
>> 7FEA61B77000
>>
>> What's up with that?
>
> Found it! I was destroy(class) manually allocated class.
> That was my fault. Completely. I knew I would be embarrassed if I posted
> this. =P
>
> I am now in love with cgdb.
> Go get it. It's beautiful.

Well, mostly. It still has different output on -O, but no longer crashes.

On 02/10/2013 09:26 PM, 1100110 wrote:
> On 02/10/2013 07:14 PM, 1100110 wrote:
>> I've taken std.mmfile, and been playing with it.
>>
>> I won't lie, mostly I've just been messing with it.
>> The idea was originally to fix opDollar for mmfile (which I can push if
>> it will be accepted.)
>>
>> I turned it into a template for funsies.
>> And a struct. For funsies.
>>
>> And it Works! mostly.
>>
>> But only if you don't compile with -O.
>> -release works, -inline works, -noboundscheck works.
>>
>> heres an example:
>> ---
>> import std.conv, std.stdio;
>> void main()
>> {
>> auto mm = mmFile!string("mmTest.d");
>> string mt = mm[0..50];
>> string ms = mt[0..50];
>> string ss = mm.data;
>>
>> writeln(mm[0..$]);//prints the entire file.
>> writeln(ms);//prints the first 50 characters.
>>
>> writeln(mm.data.ptr);//data is the internal string.
>> writeln(ms.ptr);//all of these should be equal.
>> writeln(mt.ptr);//But this one and the one above are not.
>> writeln(ss.ptr);//also nothing gets printed with -O, it segfaults.
>>
>> return;
>> }
>> --
>>
>> Here is an example output with rdmd mmTest.d:
>> //the above file[0..$]
>> //the about file[0..50]
>> 7F47535F5000
>> 7F47535F5000
>> 7F47535F5000
>> 7F47535F5000
>>
>> Here is outut with rdmd -O mmTest.d:
>> �
>> �
>> 7FEA61B77000
>> 406470
>> 406470
>> 7FEA61B77000
>>
>> What's up with that?
>
> Found it! I was destroy(class) manually allocated class.
> That was my fault. Completely. I knew I would be embarrassed if I posted
> this. =P
>
> I am now in love with cgdb.
> Go get it. It's beautiful.

And It turns out that I f'd up my opSlice as well.
And it seems to be working perfectly now.

Thanks for all the help! I couldn't have done it without you guys!
(that is a light-hearted joke, please take it as such.)