I have successfully saved and re-loaded binary data but I am having
some trouble with some data:
I wrote a binary graphics object and it takes data in a BYTE form.
Here is the data I have and how I save then load it:
static BYTE bits [] =
{0xff,0xff, 0x00,0x00, 0x7f,0xfe, 0x7f,0xfe,
0x7f,0xfe, 0x7f,0xfe, 0x7f,0xfe, 0x7e,0x7e,
0x7e,0x7e, 0x7f,0xfe, 0x7f,0xfe, 0x7f,0xfe,
0x7f,0xfe, 0x7f,0xfe, 0x7f,0xfe, 0x00,0x00};
graphics gr(bits);
std::ofstream f("box.bin", ios::out | ios::binary);
gr.save(f);
f.close();
std::ifstream f("box.bin", ios::in | ios::binary);
gr.load(f);
f.close();
void graphics::load(std::ifstream& f){
bitData.clear();
for(int lp = 0; lp != size; lp++){
f.read((char*)&bitData[lp],sizeof(BYTE));
}
}
void graphics::save(std::ofstream& f){
for(int lp = 0; lp != size; lp++){
f.write((char*)&bitData[lp], sizeof(BYTE));
}
} 2 3553
JoeC wrote:
I have successfully saved and re-loaded binary data but I am having
some trouble with some data:
That's nice. Would you mind being a bit more specific? What trouble
are you having? What are you expecting?
Post a minimal *COMPILABLE* example that exhibits the behavior in
question. Note that your fragment below is not a compilable example.
I wrote a binary graphics object and it takes data in a BYTE form.
Here is the data I have and how I save then load it:
BYTE undefined.
static BYTE bits [] =
{0xff,0xff, 0x00,0x00, 0x7f,0xfe, 0x7f,0xfe,
0x7f,0xfe, 0x7f,0xfe, 0x7f,0xfe, 0x7e,0x7e,
0x7e,0x7e, 0x7f,0xfe, 0x7f,0xfe, 0x7f,0xfe,
0x7f,0xfe, 0x7f,0xfe, 0x7f,0xfe, 0x00,0x00};
graphics undefined.
graphics gr(bits);
std::ofstream f("box.bin", ios::out | ios::binary);
gr.save(f);
f.close();
std::ifstream f("box.bin", ios::in | ios::binary);
gr.load(f);
f.close();
void graphics::load(std::ifstream& f){
bitData and size undefined.
bitData.clear();
for(int lp = 0; lp != size; lp++){
f.read((char*)&bitData[lp],sizeof(BYTE));
no error checking on istream::read().
}
}
void graphics::save(std::ofstream& f){
see comments for load.
for(int lp = 0; lp != size; lp++){
f.write((char*)&bitData[lp], sizeof(BYTE));
}
}
On Nov 19, 10:41 pm, red floyd <no.s...@here.dudewrote:
JoeC wrote:
I have successfully saved and re-loaded binary data but I am having
some trouble with some data:
That's nice. Would you mind being a bit more specific? What trouble
are you having? What are you expecting?
Post a minimal *COMPILABLE* example that exhibits the behavior in
question. Note that your fragment below is not a compilable example.
I wrote a binary graphics object and it takes data in a BYTE form.
Here is the data I have and how I save then load it:
BYTE undefined.
static BYTE bits [] =
{0xff,0xff, 0x00,0x00, 0x7f,0xfe, 0x7f,0xfe,
0x7f,0xfe, 0x7f,0xfe, 0x7f,0xfe, 0x7e,0x7e,
0x7e,0x7e, 0x7f,0xfe, 0x7f,0xfe, 0x7f,0xfe,
0x7f,0xfe, 0x7f,0xfe, 0x7f,0xfe, 0x00,0x00};
graphics undefined.
graphics gr(bits);
std::ofstream f("box.bin", ios::out | ios::binary);
gr.save(f);
f.close();
std::ifstream f("box.bin", ios::in | ios::binary);
gr.load(f);
f.close();
void graphics::load(std::ifstream& f){
bitData and size undefined.
bitData.clear();
for(int lp = 0; lp != size; lp++){
f.read((char*)&bitData[lp],sizeof(BYTE));
no error checking on istream::read().
}
}
void graphics::save(std::ofstream& f){
see comments for load.
for(int lp = 0; lp != size; lp++){
f.write((char*)&bitData[lp], sizeof(BYTE));
}
}
The program compiles and runs. It seems to save data, it create the
file and seems to be about the right size but I can't seem to get the
data to load. That is I save the graphics then when I load it it does
not display the saved shape. This is the only relieve5t cone and it
does not seem to be wrong it just doesn't load. This discussion thread is closed Replies have been disabled for this discussion. Similar topics
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