• Nico_C (21/21) Jan 22 2007 Hi
• Heinz (5/34) Jan 22 2007 Hi, i'm not a great wizard in binary I/O. There's no read() that takes u...
• =?ISO-8859-1?Q?Jari-Matti_M=E4kel=E4?= (10/21) Jan 22 2007 readExact(void* buffer, uint size) takes a pointer to the buffer. No

Nico_C <nicolas.charvin libertysurf.fr> writes:

Hi
I am trying to port a tool from C to D, and I have trouble to read data 
from binary file, using arrays.

in C, I use the following instructions

#define NBCHANNELSMAX = 4096
unsigned int spectrum[NBCHANNELSMAX];
fread(&spectrum, sizeof(unsigned int), nbChannels, file_in);

but in D, AFAIK, I can only read ubyte[], and the code:

uint arruint[];
arruint.length = nbChannels;
file_in.read(arruint);

gave me the following error:
function std.stream.Stream.read (ubyte[]) does not match parameter types 
(uint[])

So my question is:
1) is it possible to mimic the C fonction fread in order to get an array 
of uint, ushort, long, whatever the type ?
2) if not, how can i convert a ubyte[] to uint[], ushort[], etc..

Thanks in advance!
Best regards

nicolas

Heinz <billgates microsoft.com> writes:

Nico_C Wrote:

 Hi
 I am trying to port a tool from C to D, and I have trouble to read data 
 from binary file, using arrays.
 
 in C, I use the following instructions
 
 #define NBCHANNELSMAX = 4096
 unsigned int spectrum[NBCHANNELSMAX];
 fread(&spectrum, sizeof(unsigned int), nbChannels, file_in);
 
 but in D, AFAIK, I can only read ubyte[], and the code:
 
 uint arruint[];
 arruint.length = nbChannels;
 file_in.read(arruint);
 
 gave me the following error:
 function std.stream.Stream.read (ubyte[]) does not match parameter types 
 (uint[])
 
 So my question is:
 1) is it possible to mimic the C fonction fread in order to get an array 
 of uint, ushort, long, whatever the type ?
 2) if not, how can i convert a ubyte[] to uint[], ushort[], etc..
 
 Thanks in advance!
 Best regards
 
 nicolas


Hi, i'm not a great wizard in binary I/O. There's no read() that takes uint[]
as parameter. Look at http://www.digitalmars.com/d/phobos/std_stream.html
There's a readExact() function but it only make sence if the array is static
(fixed size) and this is not the case, try creating the array with a fixed
length.

Hope it work.
G luck.

=?ISO-8859-1?Q?Jari-Matti_M=E4kel=E4?= <jmjmak utu.fi.invalid> writes:

Heinz kirjoitti:
 Nico_C Wrote:
 
 Hi
 I am trying to port a tool from C to D, and I have trouble to read data 
 from binary file, using arrays.


 So my question is:
 1) is it possible to mimic the C fonction fread in order to get an array 
 of uint, ushort, long, whatever the type ?
 2) if not, how can i convert a ubyte[] to uint[], ushort[], etc..

 There's a readExact() function but it only make sence if the array is static
(fixed size) and this is not the case, try creating the array with a fixed
length.

readExact(void* buffer, uint size) takes a pointer to the buffer. No
need to worry, it also allows dynamic arrays. Example:

  auto f = new File("test.bin", FileMode.In);

  ubyte tmp[];
  tmp.length = 12;
  f.readExact(tmp, 12); // question 1)

  writefln(cast(uint[])tmp); // question 2)

Possible output:

  [1,2,3]