On 24/06/2018 1:26 PM, ANtlord wrote:
Hello D community!
I'm developing an application that must work on audio especially
playback Ogg files. So I took library DerelictVorbis [0] testing basic
functions like `ov_fopen`. The tests were successful so I decided to
implement core components of the application using D and Derelict
libraries.
Today I encountered a problem, the `ov_fopen` returns -1 instead of 0.
It means that something goes wrong and the file that is pointed by a
string is not opened. I figured out it so there is the error is not
occurred when a file path is pointed by a string variable from CLI input
arguments but it is occurred when the path is pointed by a string
variable filled dynamically (for example file path is read from another
file).
Here code goes
public import derelict.vorbis;
public import derelict.vorbis.file;
void main(string[] args) {
DerelictVorbis.load();
DerelictVorbisFile.load();
OggVorbis_File _ovFile;
immutable filepath = args[1];
import std.file;
import std.string;
string filepath2 = "./name.txt".readText.strip;
assert(filepath2 == filepath);
int res = ov_fopen(filepath2.ptr, &_ovFile); // res == -1
// int res = ov_fopen(filepath.ptr, &_ovFile); // res == 0
assert(res == 0, "ov_fopen returns %d".format(res));
}
Actually I get it worked replacing `string filepath2` by `char[]
filepath2` but filepath is string still and it works correctly.
So what detail The devil is in? Is there an issue in DerelictVorbis or
in compiler. Don't I know something about implementation of strings or
pointers in D?
Thanks in advance!
DMD 2.080
DerelictVorbis 2.0.0-beta.2
[0] https://github.com/DerelictOrg/DerelictVorbis
So where exactly is the null byte for the C string?
