Problems with files
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Ok, i just im making a binder and i am using the CreateFile(), ReadFile(), and WriteFile() functions now it took me long enough to figure out you cant read 28KB file into a buffer and write it all at once Problem 1 As you should be able to guess im going to split the output by a string (no problem since i already wrote a function for that) but if im reading in segments then well you know it could cut into that string im splitting by Problem 2 SetFilePointer doesnt seem to be working for me if i could get this to work i have an idea that m might (i stress might) solve my problems
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Ok, i just im making a binder and i am using the CreateFile(), ReadFile(), and WriteFile() functions now it took me long enough to figure out you cant read 28KB file into a buffer and write it all at once Problem 1 As you should be able to guess im going to split the output by a string (no problem since i already wrote a function for that) but if im reading in segments then well you know it could cut into that string im splitting by Problem 2 SetFilePointer doesnt seem to be working for me if i could get this to work i have an idea that m might (i stress might) solve my problems
Didn't the third parameter of ReadFile work (nNumberOfBytesToRead)? Jaime
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Didn't the third parameter of ReadFile work (nNumberOfBytesToRead)? Jaime
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Ok, i just im making a binder and i am using the CreateFile(), ReadFile(), and WriteFile() functions now it took me long enough to figure out you cant read 28KB file into a buffer and write it all at once Problem 1 As you should be able to guess im going to split the output by a string (no problem since i already wrote a function for that) but if im reading in segments then well you know it could cut into that string im splitting by Problem 2 SetFilePointer doesnt seem to be working for me if i could get this to work i have an idea that m might (i stress might) solve my problems
»Archer282« wrote: now it took me long enough to figure out you cant read 28KB file into a buffer and write it all at once Sure you can. I've used these functions before to read in a file 10x larger than that. No problem.
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
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Ok, i just im making a binder and i am using the CreateFile(), ReadFile(), and WriteFile() functions now it took me long enough to figure out you cant read 28KB file into a buffer and write it all at once Problem 1 As you should be able to guess im going to split the output by a string (no problem since i already wrote a function for that) but if im reading in segments then well you know it could cut into that string im splitting by Problem 2 SetFilePointer doesnt seem to be working for me if i could get this to work i have an idea that m might (i stress might) solve my problems
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well at first i just read all of it into one buffer i defined it like so char *szBuffer; and then wrote all of it right after reading everytime i would get the blue screen of death then if i returned to windows it would be locked up i looked at an example on MSDN which read and wrote the data in segments, i have had success doing it this way (no problems, except for the ones i mentioned) note: when i did this in segments i defined my buffer like char szBuffer[1024]; could this have been a problem? if it will help i clean up and post the old code that was wasnt working
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Ok, i just im making a binder and i am using the CreateFile(), ReadFile(), and WriteFile() functions now it took me long enough to figure out you cant read 28KB file into a buffer and write it all at once Problem 1 As you should be able to guess im going to split the output by a string (no problem since i already wrote a function for that) but if im reading in segments then well you know it could cut into that string im splitting by Problem 2 SetFilePointer doesnt seem to be working for me if i could get this to work i have an idea that m might (i stress might) solve my problems
Funny how right when i go and ask for help my problem seem to be solved before i get an answer I kinda reverted my code to the way it was when i gettting the bsod and now it seems to be working just fine and i manged to get SetFilePointer() to go to the end but i had to use GetFileSize() Logically you would think you could go to the end by doing SetFilePointer( hFile, 0, NULL, FILE_END ); but i cant it get it to work doing that infact i cant even get it to go anywhere from FILE_END just occured to me could that be becuase i only used GENERIC_WRITE access?
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well at first i just read all of it into one buffer i defined it like so char *szBuffer; and then wrote all of it right after reading everytime i would get the blue screen of death then if i returned to windows it would be locked up i looked at an example on MSDN which read and wrote the data in segments, i have had success doing it this way (no problems, except for the ones i mentioned) note: when i did this in segments i defined my buffer like char szBuffer[1024]; could this have been a problem? if it will help i clean up and post the old code that was wasnt working
>>well at first i just read all of it into one buffer. i defined it like so >>char *szBuffer; Well Mr. Hotshot, are you allocating memory for szBuffer ??? before using it with your file-handling-functions.... IF NO.... god help you X| . If yes... sorry. USE
mallocornewto alllocate appropriate amount of memory. >>note: when i did this in segments i defined my buffer like >>char szBuffer[1024]; look closely... here you alocate the buffer's size to be 1024 bytes. BUT in char* szBuffer.... YOU MAY NOT BE ALLOCATING ANY MEMORY and the 'BLUE SCREEN' loves programmers like you. ;P .... i hope i helped;) ...Avenger
Remember... testing & debugging are always part of programming ...so exterminate those stinking bugs
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Funny how right when i go and ask for help my problem seem to be solved before i get an answer I kinda reverted my code to the way it was when i gettting the bsod and now it seems to be working just fine and i manged to get SetFilePointer() to go to the end but i had to use GetFileSize() Logically you would think you could go to the end by doing SetFilePointer( hFile, 0, NULL, FILE_END ); but i cant it get it to work doing that infact i cant even get it to go anywhere from FILE_END just occured to me could that be becuase i only used GENERIC_WRITE access?
Well, here's an idea to stop all those kind helping people from answering for nothing: :D Once you realize you solved your problem, you could edit your original post and change its title, appending "<--solved" to it. This would also have the added advantage of giving a clue to people having the same kind of question that they might find their answer in that thread. Anyone agrees with me ?