grandin@boulder.Colorado.EDU (Keith T. Grandin) (04/12/90)
I have two programming questions : 1 - Is there a way to do a real move of files? I would like to be able to move both files and directories, but Turboc's rename() function and DOS function 86 (INT 33, _AH = 56H) do not support directory moves (i.e. changing a directories name to a new path like moving c:\tmp\norton to c:\norton). 2 - How can a program find out what kind of processor and how much memory is in the machine it is run on. I would like to be able to write an "intelligent" program which could use extended memory if the correct processor and memory are availible. I would prefer responses to be in C (TurboC 2.0) but both assembly (MASM 5.0) and pascal (Turbo Pascal 5.5) are fine. Thanks in advance, Keith Grandin grandin@tramp.colorado.edu grandin%tramp@boulder.colorado.edu
wilber@sal-sun31.usc.edu (John Wilber) (04/13/90)
In article <19580@boulder.Colorado.EDU> grandin@tramp.Colorado.EDU (Keith Grandin) writes: > 1 - Is there a way to do a real move of files? I would like to With one function call, I don't think so, but you should be able to copy the file to the destination with a temporary name, delete the old file, and then rename the new one with the filename from the old one. You should be able to do all of this, including assigning the temporary name (if I'm correct) with INT 21 BIOS calls. > 2 - How can a program find out what kind of processor and how Gee, can't help you much here. Looking at some Intel hardware manuals might help you on this one. > Keith Grandin /**********************************************************************\ * John J. Wilber * Socialism and communism are for those people * * wilber@nunki.usc.edu * who feel they can't make it in a freely * * student, partier, and * competitive society. * * fun-loving guy. * * \**********************************************************************/
bakke@plains.UUCP (Jeffrey P. Bakke) (04/13/90)
>In article <19580@boulder.Colorado.EDU> grandin@tramp.Colorado.EDU (Keith Grandin) writes: Stuff... > >> 2 - How can a program find out what kind of processor and how > You might want to download and check out the sources for fractint 12.0 (or any of the few previous versions). They have source code for determining what type of CPU and FPU you're using. They use this to determine which instruction set to use for floating point math... Jeff Bakke bakke@plains.NoDak.edu
elmo@image.soe.clarkson.edu (Paul B. Davidson,ERCTERM,2682292,2862026) (04/13/90)
From article <9065@chaph.usc.edu>, by wilber@sal-sun31.usc.edu (John Wilber): > In article <19580@boulder.Colorado.EDU> grandin@tramp.Colorado.EDU (Keith Grandin) writes: > >> 1 - Is there a way to do a real move of files? I would like to > > With one function call, I don't think so, but you should be able to copy > the file to the destination with a temporary name, delete the old file, > and then rename the new one with the filename from the old one. You > should be able to do all of this, including assigning the temporary name > (if I'm correct) with INT 21 BIOS calls. > Forgive my stupidity if this won't work exactly, but how about simply playing with the directory entry so that it appears in a different location? That way, you don't have to worry about not having enough space to copy and delete... Of course, if you wanna move between disks, you're gonna have to move and copy.... but you already knew *that*. :-) -Paul B. Davidson, (elmo@sun.soe.clarkson.edu)
bobmon@iuvax.cs.indiana.edu (RAMontante) (04/13/90)
- <19580@boulder.Colorado.EDU> grandin@tramp.Colorado.EDU (Keith Grandin): -> 1 - Is there a way to do a real move of files? I would like to -<9065@chaph.usc.edu>, by wilber@sal-sun31.usc.edu (John Wilber): - With one function call, I don't think so, but you should be able to copy - the file to the destination with a temporary name, delete the old file, - and then rename the new one with the filename from the old one. You - should be able to do all of this, including assigning the temporary name - (if I'm correct) with INT 21 BIOS calls. Eeek. Check Interrupt 0x21, function 0x56, "rename file". It does precisely what you want, namely it creates a new directory entry (in the desired subdirectory) and removes the old entry, without touching the file itself. The MSDOS "RENAME" command doesn't make use of this, but various freely-available programs (often called "mv") do. Turbo C's rename() function makes use of this system call. Naturally it can't work across devices.
frisk@rhi.hi.is (Fridrik Skulason) (04/13/90)
In article <9065@chaph.usc.edu> wilber@sal-sun31.usc.edu (John Wilber) writes: >In article <19580@boulder.Colorado.EDU> grandin@tramp.Colorado.EDU (Keith Grandin) writes: > >> 1 - Is there a way to do a real move of files? I would like to > >With one function call, I don't think so, It is possible. INT 21H, function 56H will allow you to move a file, provided the disks are the same. It is just the fault of COMMAND.COM that you cannot do this very easily. I once wrote a tiny utility (in assembly) that would do just this: MV /SUBDIR1/*.C /SUBDIR2/*.OLD If anybody is interested just send me a note and I'll send you a copy. > >> 2 - How can a program find out what kind of processor and how > There was a program posted several months ago that did just this - I am not sure if it could distinguish a 8088 from 8086, though. I lost my copy, but somebody must have it. -- Fridrik Skulason University of Iceland | Technical Editor of the Virus Bulletin (UK) | Reserved for future expansion E-Mail: frisk@rhi.hi.is Fax: 354-1-28801 |