forked from KolibriOS/kolibrios
553 lines
28 KiB
NASM
553 lines
28 KiB
NASM
;;================================================================================================;;
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;;//// libio.asm //// (c) mike.dld, 2006-2008 ////////////////////////////////////////////////////;;
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;;================================================================================================;;
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;; ;;
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;; This file is part of Common development libraries (Libs-Dev). ;;
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;; ;;
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;; Libs-Dev is free software: you can redistribute it and/or modify it under the terms of the GNU ;;
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;; Lesser General Public License as published by the Free Software Foundation, either version 2.1 ;;
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;; of the License, or (at your option) any later version. ;;
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;; ;;
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;; Libs-Dev is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without ;;
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;; even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ;;
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;; Lesser General Public License for more details. ;;
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;; ;;
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;; You should have received a copy of the GNU Lesser General Public License along with Libs-Dev. ;;
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;; If not, see <http://www.gnu.org/licenses/>. ;;
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;; ;;
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;;================================================================================================;;
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;; ;;
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;; 2008-08-06 (mike.dld) ;;
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;; changes: ;;
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;; - split private procs into libio_p.asm, added comments ;;
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;; 2007-12-10 (mike.dld) ;;
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;; changes: ;;
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;; - almost fully incompatible with previous version since return values were changed. ;;
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;; now they are more C-like ;;
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;; notes: ;;
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;; - `file.err` is not yet available ;;
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;; 2007-09-26 (mike.dld) ;;
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;; changes: ;;
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;; - modified `file.size` a bit (according to changes in FileInfo struct) ;;
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;; - added `file.find_first`, `file.find_next`, `file.find_close` ;;
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;; notes: ;;
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;; - `file.aux.match_wildcard` is exported only for testing purposes, don't ;;
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;; use it since it may be removed or renamed in next versions ;;
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;; ;;
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;;================================================================================================;;
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format MS COFF
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public @EXPORT as 'EXPORTS'
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include '../../../../proc32.inc'
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include '../../../../macros.inc'
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purge section,mov,add,sub
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include 'libio.inc'
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include 'libio_p.inc'
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section '.flat' code readable align 16
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include 'libio_p.asm'
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;;================================================================================================;;
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proc file.find_first _dir, _mask, _attr ;/////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Find first file with matching attributes and mask in specified directory ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _dir = directory path to search in <asciiz> ;;
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;> _mask = file mask, with use of wildcards <asciiz> ;;
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;> _attr = file attributes mask (combination of FA_* constants) <dword> ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = 0 (error) / matched file data pointer (acts as find descriptor) <FileInfo*> ;;
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;;================================================================================================;;
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push ebx edx
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invoke mem.alloc, sizeof.FindFileBlock
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or eax, eax
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jz .exit.error
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mov edx, eax
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mov ebx, [_attr]
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mov [edx + FindFileBlock.Options.Attributes], ebx
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mov ebx, [_mask]
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mov [edx + FindFileBlock.Options.Mask], ebx
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lea ebx, [edx + FindFileBlock.InfoBlock]
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mov [ebx + FileInfoBlock.Function], F70_READ_D
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mov [ebx + FileInfoBlock.Count], 1
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lea eax, [edx + FindFileBlock.Header]
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mov [ebx + FileInfoBlock.Buffer], eax
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mov eax, [_dir]
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mov [ebx + FileInfoBlock.FileName], eax
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stdcall libio._.find_matching_file, edx
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pop edx ebx
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ret
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.exit.error:
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xor eax, eax
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pop edx ebx
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ret
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endp
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;;================================================================================================;;
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proc file.find_next _findd ;//////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Find next file matching criteria ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _findd = find descriptor (see `file.find_first`) <FileInfo*> ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = 0 (error) / matched file data pointer (acts as find descriptor) <FileInfo*> ;;
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;;================================================================================================;;
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mov eax, [_findd]
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add eax, -sizeof.FileInfoHeader
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inc [eax + FindFileBlock.InfoBlock.Position]
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stdcall libio._.find_matching_file, eax
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ret
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endp
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;;================================================================================================;;
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proc file.find_close _findd ;/////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Close find descriptor and free memory ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _findd = find descriptor (see `file.find_first`) <FileInfo*> ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = result of memory freeing routine ;;
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;;================================================================================================;;
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mov eax, [_findd]
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add eax, -sizeof.FileInfoHeader
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invoke mem.free, eax
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ret
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endp
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;;================================================================================================;;
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proc file.size _name ;////////////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Get file size ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _name = path to file (full or relative) <asciiz> ;;
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;;------------------------------------------------------------------------------------------------;;
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;< ebx = -1 (error) / file size (in bytes, up to 2G) <dword> ;;
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;;------------------------------------------------------------------------------------------------;;
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;# call `file.err` to obtain extended error information ;;
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;;================================================================================================;;
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locals
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loc_info FileInfoBlock
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endl
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lea ebx, [loc_info]
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invoke mem.alloc, 40
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push eax
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mov [ebx + FileInfoBlock.Function], F70_GETATTR_FD
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mov [ebx + FileInfoBlock.Buffer], eax
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mov byte[ebx + FileInfoBlock.FileName - 1], 0
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mov eax, [_name]
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mov [ebx + FileInfoBlock.FileName], eax
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mcall 70
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pop ebx
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push eax
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mov eax, ebx
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mov ebx, [ebx + FileInfo.FileSizeLow]
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invoke mem.free, eax
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pop eax
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ret
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endp
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;;================================================================================================;;
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proc file.open _name, _mode ;/////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Open file ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _name = path to file (full or relative) <asciiz> ;;
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;> _mode = mode to open file in (combination of O_* constants) <dword> ;;
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;> O_BINARY - don't change read/written data in any way (default) ;;
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;> O_READ - open file for reading ;;
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;> O_WRITE - open file for writing ;;
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;> O_CREATE - create file if it doesn't exist, open otherwise ;;
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;> O_SHARE - allow simultaneous access by using different file descriptors (not implemented) ;;
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;> O_TEXT - replace newline chars with LF (overrides O_BINARY, not implemented) ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = 0 (error) / file descriptor <InternalFileInfo*> ;;
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;;------------------------------------------------------------------------------------------------;;
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;# call `file.err` to obtain extended error information ;;
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;;================================================================================================;;
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locals
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loc_info FileInfoBlock
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loc_buf rb 40
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endl
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push ebx esi edi
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xor ebx, ebx
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invoke mem.alloc, sizeof.InternalFileInfo
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or eax, eax
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jz .exit_error
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mov ebx, eax
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push [_mode]
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pop [ebx + InternalFileInfo.Mode]
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mov [ebx + InternalFileInfo.Position], 0
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lea edi, [ebx + InternalFileInfo.FileName]
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mov esi, [_name]
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mov ecx, 260 / 4
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cld
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rep movsd
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.get_info:
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push ebx
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mov [loc_info.Function], F70_GETATTR_FD
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lea eax, [loc_buf]
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mov [loc_info.Buffer], eax
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mov byte[loc_info.FileName - 1], 0
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mov eax, [_name]
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mov [loc_info.FileName], eax
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lea ebx, [loc_info]
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mcall 70
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pop ebx
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or eax, eax
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jz @f
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cmp eax, 6
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jne .exit_error.ex
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@@:
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mov eax, ebx
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pop edi esi ebx
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ret
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.exit_error.ex:
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test [_mode], O_CREATE
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jz .exit_error
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push ebx
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mov [loc_info.Function], F70_CREATE_F
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xor eax, eax
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mov [loc_info.Position], eax
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mov [loc_info.Flags], eax
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mov [loc_info.Count], eax
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lea ebx, [loc_info]
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mcall 70
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pop ebx
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or eax, eax
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jz .get_info
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.exit_error:
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invoke mem.free, ebx
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xor eax, eax
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pop edi esi ebx
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ret
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endp
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;;================================================================================================;;
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proc file.read _filed, _buf, _buflen ;////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Read data from file ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _filed = file descriptor (see `file.open`) <InternalFileInfo*> ;;
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;> _buf = buffer to put read data to <byte*> ;;
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;> _buflen = buffer size (number of bytes to be read from file) <dword> ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = -1 (error) / number of bytes read <dword> ;;
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;;------------------------------------------------------------------------------------------------;;
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;# call `file.err` to obtain extended error information ;;
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;;================================================================================================;;
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locals
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loc_info FileInfoBlock
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endl
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push ebx esi edi
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mov ebx, [_filed]
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test [ebx + InternalFileInfo.Mode], O_READ
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jz .exit_error
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xor eax, eax
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mov [loc_info.Function], F70_READ_F
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mov [loc_info.Flags], eax
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mov byte[loc_info.FileName - 1], al
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push [ebx+InternalFileInfo.Position] [_buflen] [_buf]
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pop [loc_info.Buffer] [loc_info.Count] [loc_info.Position]
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lea eax, [ebx + InternalFileInfo.FileName]
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mov [loc_info.FileName], eax
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lea ebx, [loc_info]
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mcall 70
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or eax, eax
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jz @f
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cmp eax, 6
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jne .exit_error
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@@:
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mov eax, ebx
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mov ebx, [_filed]
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add [ebx + InternalFileInfo.Position], eax
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pop edi esi ebx
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ret
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.exit_error:
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or eax, -1
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pop edi esi ebx
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ret
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endp
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;;================================================================================================;;
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proc file.write _filed, _buf, _buflen ;///////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Write data to file ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _filed = file descriptor (see `file.open`) <InternalFileInfo*> ;;
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;> _buf = buffer to get write data from <byte*> ;;
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;> _buflen = buffer size (number of bytes to be written to file) <dword> ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = -1 (error) / number of bytes written <dword> ;;
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;;------------------------------------------------------------------------------------------------;;
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;# call `file.err` to obtain extended error information ;;
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;;================================================================================================;;
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locals
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loc_info FileInfoBlock
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endl
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push ebx esi edi
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mov ebx, [_filed]
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test [ebx + InternalFileInfo.Mode], O_WRITE
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jz .exit_error
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stdcall file.eof?, [_filed]
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or eax, eax
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js .exit_error
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jz @f
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stdcall file.truncate, [_filed]
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@@:
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mov [loc_info.Function], F70_WRITE_F
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xor eax, eax
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mov [loc_info.Flags], eax
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mov byte[loc_info.FileName - 1], al
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push [ebx + InternalFileInfo.Position] [_buflen] [_buf]
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pop [loc_info.Buffer] [loc_info.Count] [loc_info.Position]
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lea eax, [ebx + InternalFileInfo.FileName]
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mov [loc_info.FileName], eax
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lea ebx, [loc_info]
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mcall 70
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or eax, eax
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jnz .exit_error
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@@:
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mov eax, ebx
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mov ebx, [_filed]
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add [ebx + InternalFileInfo.Position],eax
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pop edi esi ebx
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ret
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.exit_error:
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or eax, -1
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pop edi esi ebx
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ret
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endp
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;;================================================================================================;;
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proc file.seek _filed, _where, _origin ;//////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Set file pointer position ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _filed = file descriptor (see `file.open`) <InternalFileInfo*> ;;
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;> _where = position in file (in bytes) counted from specified origin <dword> ;;
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;> _origin = origin from where to set the position (one of SEEK_* constants) <dword> ;;
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;> SEEK_SET - from beginning of file ;;
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;> SEEK_CUR - from current pointer position ;;
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;> SEEK_END - from end of file ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = -1 (error) / 0 <dword> ;;
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;;------------------------------------------------------------------------------------------------;;
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;# call `file.err` to obtain extended error information ;;
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;;================================================================================================;;
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push ebx ecx edx
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mov ecx, [_filed]
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lea eax, [ecx + InternalFileInfo.FileName]
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stdcall file.size, eax
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or eax, eax
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jnz .exit_error
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mov edx, [_where]
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cmp [_origin], SEEK_SET
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jne .n_set
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mov [ecx + InternalFileInfo.Position], edx
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jmp .exit_ok
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.n_set:
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cmp [_origin], SEEK_CUR
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jne .n_cur
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add [ecx + InternalFileInfo.Position], edx
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jmp .exit_ok
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.n_cur:
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cmp [_origin], SEEK_END
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jne .exit_error
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neg edx
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add edx, ebx
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mov [ecx + InternalFileInfo.Position], edx
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.exit_ok:
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cmp [ecx + InternalFileInfo.Position], 0
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jge @f
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mov [ecx + InternalFileInfo.Position], 0
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@@:
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; cmp ebx, [ecx+InternalFileInfo.Position]
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; jae @f
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; mov [ecx + InternalFileInfo.Position], ebx
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; @@:
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xor eax, eax
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pop edx ecx ebx
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ret
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.exit_error:
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or eax, -1
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pop edx ecx ebx
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ret
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endp
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;;================================================================================================;;
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proc file.eof? _filed ;///////////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Determine if file pointer is at the end of file ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _filed = file descriptor (see `file.open`) <InternalFileInfo*> ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = false / true <dword> ;;
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;;------------------------------------------------------------------------------------------------;;
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;# call `file.err` to obtain extended error information ;;
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;;================================================================================================;;
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push ebx ecx
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mov ecx, [_filed]
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lea eax, [ecx + InternalFileInfo.FileName]
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stdcall file.size, eax
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or eax, eax
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jnz .exit_error
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xor eax, eax
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cmp [ecx + InternalFileInfo.Position], ebx
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jb @f
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inc eax
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@@: pop ecx ebx
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ret
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.exit_error:
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or eax, -1
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pop ecx ebx
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ret
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endp
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;;================================================================================================;;
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proc file.truncate _filed ;///////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Truncate file size to current file pointer position ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _filed = file descriptor (see `file.open`) <InternalFileInfo*> ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = -1 (error) / 0 <dword> ;;
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;;------------------------------------------------------------------------------------------------;;
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;# call `file.err` to obtain extended error information ;;
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;;================================================================================================;;
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locals
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loc_info FileInfoBlock
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endl
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push ebx esi edi
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mov ebx, [_filed]
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test [ebx + InternalFileInfo.Mode], O_WRITE
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jz .exit_error
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mov [loc_info.Function], F70_SETSIZE_F
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mov eax, [ebx + InternalFileInfo.Position]
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mov [loc_info.Position], eax
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xor eax, eax
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mov [loc_info.Flags], eax
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mov [loc_info.Count], eax
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mov [loc_info.Buffer], eax
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mov byte[loc_info.FileName - 1], al
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lea eax, [ebx + InternalFileInfo.FileName]
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mov [loc_info.FileName], eax
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lea ebx, [loc_info]
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mcall 70
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cmp eax, 2
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je .exit_error
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cmp eax, 8
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je .exit_error
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@@: xor eax, eax
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pop edi esi ebx
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ret
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.exit_error:
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or eax, -1
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pop edi esi ebx
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ret
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endp
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file.seteof equ file.truncate
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;;================================================================================================;;
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proc file.tell _filed ;///////////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Get current file pointer position ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _filed = file descriptor (see `file.open`) <InternalFileInfo*> ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = -1 (error) / file pointer position <dword> ;;
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;;------------------------------------------------------------------------------------------------;;
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;# call `file.err` to obtain extended error information ;;
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;;================================================================================================;;
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mov eax, [_filed]
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mov eax, [eax + InternalFileInfo.Position]
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ret
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endp
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;;================================================================================================;;
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proc file.close _filed ;//////////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Close file ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _filed = file descriptor (see `file.open`) <InternalFileInfo*> ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = -1 (error) / file pointer position <dword> ;;
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;;------------------------------------------------------------------------------------------------;;
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;# call `file.err` to obtain extended error information ;;
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;;================================================================================================;;
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mov eax, [_filed]
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mov [eax + InternalFileInfo.Mode], 0
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mov [eax + InternalFileInfo.FileName], 0
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invoke mem.free, eax
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xor eax, eax
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ret
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endp
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;;================================================================================================;;
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;;////////////////////////////////////////////////////////////////////////////////////////////////;;
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;;================================================================================================;;
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;! Exported functions section ;;
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;;================================================================================================;;
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;;////////////////////////////////////////////////////////////////////////////////////////////////;;
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;;================================================================================================;;
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align 16
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@EXPORT:
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export \
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libio._.init , 'lib_init' , \
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0x00040004 , 'version' , \
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file.find_first , 'file_find_first' , \
|
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file.find_next , 'file_find_next' , \
|
|
file.find_close , 'file_find_close' , \
|
|
file.size , 'file_size' , \
|
|
file.open , 'file_open' , \
|
|
file.read , 'file_read' , \
|
|
file.write , 'file_write' , \
|
|
file.seek , 'file_seek' , \
|
|
file.tell , 'file_tell' , \
|
|
file.eof? , 'file_iseof' , \
|
|
file.seteof , 'file_seteof' , \
|
|
file.truncate , 'file_truncate' , \
|
|
file.close , 'file_close'
|
|
|