writing to mem using pointer
BlitzMax Forums/BlitzMax Beginners Area/writing to mem using pointer
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| Hi I am trying to write to memory using a pointer, but i have no idea how to do it. The function is defined: Function ReadToBuff(file:TStream,offset,ptr_dest_buff:Byte Ptr) SeekStream(file,offset) ...loop val = Readint(file) and now im trying to write the int into the buffer, but how? something like that...: 'ptr_dest_buff[cnt] = val ...end loop As you wuold have guessed, ptr_dest_buff is a pointer to buffer in which i want to write. What i want to do is to read a portion of a binary file into a matrix, if you've got any other ideas let me know. Thanks |
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| Nevermind, i found out about "banks" :). |
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| Banks is one way of doing it, although I don't personally like that you have to specify a bank number in order to just poke or peek data. You can just put [0] on the end of a byte pointer or other pointer to refer to the data at pointer+0 (or another offset). e.g. mypointer[0]=15 'write 15 into the address at mypointer. mypointer[12]=15 'write 15 into the address at mypointer+12 But bear in mind it's 12 multiples of the size of the type of the pointer, so if its a byte pointer it'd be +12, if it's an int pointer its +12*4 |
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| You could use GCMalloc() Local i:Int Ptr = Int Ptr GCMalloc(16) i[0] = 1000 i[1] = 2000 i[2] = 3000 i[3] = 4000 Print i[0] Print i[1] Print i[2] Print i[3] FlushMem 'free the memory used by 'i' |
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