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;;================================================================================================;;

;;//// libio.asm //// (c) mike.dld, 2006-2008 ////////////////////////////////////////////////////;;

;;================================================================================================;;

;;                                                                                                ;;

;; This file is part of Common development libraries (Libs-Dev).                                  ;;

;;                                                                                                ;;

;; Libs-Dev is free software: you can redistribute it and/or modify it under the terms of the GNU ;;

;; Lesser General Public License as published by the Free Software Foundation, either version 2.1 ;;

;; of the License, or (at your option) any later version.                                         ;;

;;                                                                                                ;;

;; Libs-Dev is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without  ;;

;; even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU  ;;

;; Lesser General Public License for more details.                                                ;;

;;                                                                                                ;;

;; You should have received a copy of the GNU Lesser General Public License along with Libs-Dev.  ;;

;; If not, see .                                                    ;;

;;                                                                                                ;;

;;================================================================================================;;

;;                                                                                                ;;

;; 2008-08-06 (mike.dld)                                                                          ;;

;;   changes:                                                                                     ;;

;;     - split private procs into libio_p.asm, added comments                                     ;;

;; 2007-12-10 (mike.dld)                                                                          ;;

;;   changes:                                                                                     ;;

;;     - almost fully incompatible with previous version since return values were changed.        ;;

;;       now they are more C-like                                                                 ;;

;;   notes:                                                                                       ;;

;;     - `file.err` is not yet available                                                          ;;

;; 2007-09-26 (mike.dld)                                                                          ;;

;;   changes:                                                                                     ;;

;;     - modified `file.size` a bit (according to changes in FileInfo struct)                     ;;

;;     - added `file.find_first`, `file.find_next`, `file.find_close`                             ;;

;;   notes:                                                                                       ;;

;;     - `file.aux.match_wildcard` is exported only for testing purposes, don't                   ;;

;;       use it since it may be removed or renamed in next versions                               ;;

;;                                                                                                ;;

;;================================================================================================;;

format MS COFF

public @EXPORT as 'EXPORTS'

include '../../../../proc32.inc'

include '../../../../macros.inc'

purge section;mov,add,sub

include 'libio.inc'

include 'libio_p.inc'

section '.flat' code readable align 16

include 'libio_p.asm'

;;================================================================================================;;

proc file.find_first _dir, _mask, _attr ;/////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Find first file with matching attributes and mask in specified directory                       ;;

;;------------------------------------------------------------------------------------------------;;

;> _dir = directory path to search in                                                     ;;

;> _mask = file mask, with use of wildcards                                               ;;

;> _attr = file attributes mask (combination of FA_* constants)                            ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = 0 (error) / matched file data pointer (acts as find descriptor)               ;;

;;================================================================================================;;

	push	ebx edx

	invoke	mem.alloc, sizeof.FindFileBlock

	or	eax, eax

	jz	.exit.error

	mov	edx, eax

	mov	ebx, [_attr]

	mov	[edx + FindFileBlock.Options.Attributes], ebx

	mov	ebx, [_mask]

	mov	[edx + FindFileBlock.Options.Mask], ebx

	lea	ebx, [edx + FindFileBlock.InfoBlock]

	mov	[ebx + FileInfoBlock.Function], F70_READ_D

	mov	[ebx + FileInfoBlock.Count], 1

	lea	eax, [edx + FindFileBlock.Header]

	mov	[ebx + FileInfoBlock.Buffer], eax

	mov	eax, [_dir]

	mov	[ebx + FileInfoBlock.FileName], eax

	stdcall libio._.find_matching_file, edx

	pop	edx ebx

	ret

  .exit.error:

	xor	eax, eax

	pop	edx ebx

	ret

endp

;;================================================================================================;;

proc file.find_next _findd ;//////////////////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Find next file matching criteria                                                               ;;

;;------------------------------------------------------------------------------------------------;;

;> _findd = find descriptor (see `file.find_first`)                                    ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = 0 (error) / matched file data pointer (acts as find descriptor)               ;;

;;================================================================================================;;

	mov	eax, [_findd]

	add	eax, -sizeof.FileInfoHeader

	inc	[eax + FindFileBlock.InfoBlock.Position]

	stdcall libio._.find_matching_file, eax

	ret

endp

;;================================================================================================;;

proc file.find_close _findd ;/////////////////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Close find descriptor and free memory                                                          ;;

;;------------------------------------------------------------------------------------------------;;

;> _findd = find descriptor (see `file.find_first`)                                    ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = result of memory freeing routine                                                         ;;

;;================================================================================================;;

	mov	eax, [_findd]

	add	eax, -sizeof.FileInfoHeader

	invoke	mem.free, eax

	ret

endp

;;================================================================================================;;

proc file.size _name ;////////////////////////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Get file size                                                                                  ;;

;;------------------------------------------------------------------------------------------------;;

;> _name = path to file (full or relative)                                                ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = -1 (error) / file size (in bytes, up to 2G)                                       ;;

;;------------------------------------------------------------------------------------------------;;

;# call `file.err` to obtain extended error information                                           ;;

;;================================================================================================;;

locals

  loc_info FileInfoBlock

endl

	lea	ebx, [loc_info]

	invoke	mem.alloc, 40

	push	eax

	mov	[ebx + FileInfoBlock.Function], F70_GETATTR_FD

	mov	[ebx + FileInfoBlock.Buffer], eax

	mov	byte[ebx + FileInfoBlock.FileName - 1], 0

	mov	eax, [_name]

	mov	[ebx + FileInfoBlock.FileName], eax

	mcall	70

	pop	ebx

	push	eax

	mov	eax, ebx

	mov	ebx, [ebx + FileInfo.FileSizeLow]

	invoke	mem.free, eax

	pop	eax

	ret

endp

;;================================================================================================;;

proc file.open _name, _mode ;/////////////////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Open file                                                                                      ;;

;;------------------------------------------------------------------------------------------------;;

;> _name = path to file (full or relative)                                                ;;

;> _mode = mode to open file in (combination of O_* constants)                             ;;

;>   O_BINARY - don't change read/written data in any way (default)                               ;;

;>   O_READ - open file for reading                                                               ;;

;>   O_WRITE - open file for writing                                                              ;;

;>   O_CREATE - create file if it doesn't exist, open otherwise                                   ;;

;>   O_SHARE - allow simultaneous access by using different file descriptors (not implemented)    ;;

;>   O_TEXT - replace newline chars with LF (overrides O_BINARY, not implemented)                 ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = 0 (error) / file descriptor                                           ;;

;;------------------------------------------------------------------------------------------------;;

;# call `file.err` to obtain extended error information                                           ;;

;;================================================================================================;;

locals

  loc_info FileInfoBlock

  loc_buf  rb 40

endl

	push	ebx ecx esi edi

	xor	ebx, ebx

	invoke	mem.alloc, sizeof.InternalFileInfo

	or	eax, eax

	jz	.exit_error

	mov	ebx, eax

	push	[_mode]

	pop	[ebx + InternalFileInfo.Mode]

	mov	[ebx + InternalFileInfo.Position], 0

	lea	edi, [ebx + InternalFileInfo.FileName]

	mov	esi, [_name]

	mov	ecx, 260 / 4

	cld

	rep	movsd

  .get_info:

	push	ebx

	mov	[loc_info.Function], F70_GETATTR_FD

	lea	eax, [loc_buf]

	mov	[loc_info.Buffer], eax

	mov	byte[loc_info.FileName - 1], 0

	mov	eax, [_name]

	mov	[loc_info.FileName], eax

	lea	ebx, [loc_info]

	mcall	70

	pop	ebx

	or	eax, eax

	jz	@f

	cmp	eax, 6

	jne	.exit_error.ex

    @@:

	mov	eax, ebx

	pop	edi esi ecx ebx

	ret

  .exit_error.ex:

	test	[_mode], O_CREATE

	jz	.exit_error

	push	ebx

	mov	[loc_info.Function], F70_CREATE_F

	xor	eax, eax

	mov	[loc_info.Position], eax

	mov	[loc_info.Flags], eax

	mov	[loc_info.Count], eax

	lea	ebx, [loc_info]

	mcall	70

	pop	ebx

	or	eax, eax

	jz	.get_info

  .exit_error:

	invoke	mem.free, ebx

	xor	eax, eax

	pop	edi esi ecx ebx

	ret

endp

;;================================================================================================;;

proc file.read _filed, _buf, _buflen ;////////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Read data from file                                                                            ;;

;;------------------------------------------------------------------------------------------------;;

;> _filed = file descriptor (see `file.open`)                                  ;;

;> _buf = buffer to put read data to                                                       ;;

;> _buflen = buffer size (number of bytes to be read from file)                            ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = -1 (error) / number of bytes read                                                 ;;

;;------------------------------------------------------------------------------------------------;;

;# call `file.err` to obtain extended error information                                           ;;

;;================================================================================================;;

locals

  loc_info FileInfoBlock

endl

	push	ebx esi edi

	mov	ebx, [_filed]

	test	[ebx + InternalFileInfo.Mode], O_READ

	jz	.exit_error

	xor	eax, eax

	mov	[loc_info.Function], F70_READ_F

	mov	[loc_info.Flags], eax

	mov	byte[loc_info.FileName - 1], al

	push	[ebx+InternalFileInfo.Position] [_buflen] [_buf]

	pop	[loc_info.Buffer] [loc_info.Count] [loc_info.Position]

	lea	eax, [ebx + InternalFileInfo.FileName]

	mov	[loc_info.FileName], eax

	lea	ebx, [loc_info]

	mcall	70

	or	eax, eax

	jz	@f

	cmp	eax, 6

	jne	.exit_error

    @@:

	mov	eax, ebx

	mov	ebx, [_filed]

	add	[ebx + InternalFileInfo.Position], eax

	pop	edi esi ebx

	ret

  .exit_error:

	or	eax, -1

	pop	edi esi ebx

	ret

endp

;;================================================================================================;;

proc file.write _filed, _buf, _buflen ;///////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Write data to file                                                                             ;;

;;------------------------------------------------------------------------------------------------;;

;> _filed = file descriptor (see `file.open`)                                  ;;

;> _buf = buffer to get write data from                                                    ;;

;> _buflen = buffer size (number of bytes to be written to file)                           ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = -1 (error) / number of bytes written                                              ;;

;;------------------------------------------------------------------------------------------------;;

;# call `file.err` to obtain extended error information                                           ;;

;;================================================================================================;;

locals

  loc_info FileInfoBlock

endl

	push	ebx esi edi

	mov	ebx, [_filed]

	test	[ebx + InternalFileInfo.Mode], O_WRITE

	jz	.exit_error

	stdcall file.eof?, [_filed]

	or	eax, eax

	js	.exit_error

	jz	@f

	stdcall file.truncate, [_filed]

    @@:

	mov	[loc_info.Function], F70_WRITE_F

	xor	eax, eax

	mov	[loc_info.Flags], eax

	mov	byte[loc_info.FileName - 1], al

	push	[ebx + InternalFileInfo.Position] [_buflen] [_buf]

	pop	[loc_info.Buffer] [loc_info.Count] [loc_info.Position]

	lea	eax, [ebx + InternalFileInfo.FileName]

	mov	[loc_info.FileName], eax

	lea	ebx, [loc_info]

	mcall	70

	or	eax, eax

	jnz	.exit_error

    @@:

	mov	eax, ebx

	mov	ebx, [_filed]

	add	[ebx + InternalFileInfo.Position],eax

	pop	edi esi ebx

	ret

  .exit_error:

	or	eax, -1

	pop	edi esi ebx

	ret

endp

;;================================================================================================;;

proc file.seek _filed, _where, _origin ;//////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Set file pointer position                                                                      ;;

;;------------------------------------------------------------------------------------------------;;

;> _filed = file descriptor (see `file.open`)                                  ;;

;> _where = position in file (in bytes) counted from specified origin                      ;;

;> _origin = origin from where to set the position (one of SEEK_* constants)               ;;

;>   SEEK_SET - from beginning of file                                                            ;;

;>   SEEK_CUR - from current pointer position                                                     ;;

;>   SEEK_END - from end of file                                                                  ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = -1 (error) / 0                                                                    ;;

;;------------------------------------------------------------------------------------------------;;

;# call `file.err` to obtain extended error information                                           ;;

;;================================================================================================;;

	push	ebx ecx edx

	mov	ecx, [_filed]

	lea	eax, [ecx + InternalFileInfo.FileName]

	stdcall file.size, eax

	or	eax, eax

	jnz	.exit_error

	mov	edx, [_where]

	cmp	[_origin], SEEK_SET

	jne	.n_set

	mov	[ecx + InternalFileInfo.Position], edx

	jmp	.exit_ok

  .n_set:

	cmp	[_origin], SEEK_CUR

	jne	.n_cur

	add	[ecx + InternalFileInfo.Position], edx

	jmp	.exit_ok

  .n_cur:

	cmp	[_origin], SEEK_END

	jne	.exit_error

	neg	edx

	add	edx, ebx

	mov	[ecx + InternalFileInfo.Position], edx

  .exit_ok:

	cmp	[ecx + InternalFileInfo.Position], 0

	jge	@f

	mov	[ecx + InternalFileInfo.Position], 0

    @@:

;       cmp     ebx, [ecx+InternalFileInfo.Position]

;       jae     @f

;       mov     [ecx + InternalFileInfo.Position], ebx

;   @@:

	xor	eax, eax

	pop	edx ecx ebx

	ret

  .exit_error:

	or	eax, -1

	pop	edx ecx ebx

	ret

endp

;;================================================================================================;;

proc file.eof? _filed ;///////////////////////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Determine if file pointer is at the end of file                                                ;;

;;------------------------------------------------------------------------------------------------;;

;> _filed = file descriptor (see `file.open`)                                  ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = false / true                                                                      ;;

;;------------------------------------------------------------------------------------------------;;

;# call `file.err` to obtain extended error information                                           ;;

;;================================================================================================;;

	push	ebx ecx

	mov	ecx, [_filed]

	lea	eax, [ecx + InternalFileInfo.FileName]

	stdcall file.size, eax

	or	eax, eax

	jnz	.exit_error

	xor	eax, eax

	cmp	[ecx + InternalFileInfo.Position], ebx

	jb	@f

	inc	eax

    @@: pop	ecx ebx

	ret

  .exit_error:

	or	eax, -1

	pop	ecx ebx

	ret

endp

;;================================================================================================;;

proc file.truncate _filed ;///////////////////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Truncate file size to current file pointer position                                            ;;

;;------------------------------------------------------------------------------------------------;;

;> _filed = file descriptor (see `file.open`)                                  ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = -1 (error) / 0                                                                    ;;

;;------------------------------------------------------------------------------------------------;;

;# call `file.err` to obtain extended error information                                           ;;

;;================================================================================================;;

locals

  loc_info FileInfoBlock

endl

	push	ebx esi edi

	mov	ebx, [_filed]

	test	[ebx + InternalFileInfo.Mode], O_WRITE

	jz	.exit_error

	mov	[loc_info.Function], F70_SETSIZE_F

	mov	eax, [ebx + InternalFileInfo.Position]

	mov	[loc_info.Position], eax

	xor	eax, eax

	mov	[loc_info.Flags], eax

	mov	[loc_info.Count], eax

	mov	[loc_info.Buffer], eax

	mov	byte[loc_info.FileName - 1], al

	lea	eax, [ebx + InternalFileInfo.FileName]

	mov	[loc_info.FileName], eax

	lea	ebx, [loc_info]

	mcall	70

	cmp	eax, 2

	je	.exit_error

	cmp	eax, 8

	je	.exit_error

    @@: xor	eax, eax

	pop	edi esi ebx

	ret

  .exit_error:

	or	eax, -1

	pop	edi esi ebx

	ret

endp

file.seteof equ file.truncate

;;================================================================================================;;

proc file.tell _filed ;///////////////////////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Get current file pointer position                                                              ;;

;;------------------------------------------------------------------------------------------------;;

;> _filed = file descriptor (see `file.open`)                                  ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = -1 (error) / file pointer position                                                ;;

;;------------------------------------------------------------------------------------------------;;

;# call `file.err` to obtain extended error information                                           ;;

;;================================================================================================;;

	mov	eax, [_filed]

	mov	eax, [eax + InternalFileInfo.Position]

	ret

endp

;;================================================================================================;;

proc file.close _filed ;//////////////////////////////////////////////////////////////////////////;;

;;------------------------------------------------------------------------------------------------;;

;? Close file                                                                                     ;;

;;------------------------------------------------------------------------------------------------;;

;> _filed = file descriptor (see `file.open`)                                  ;;

;;------------------------------------------------------------------------------------------------;;

;< eax = -1 (error) / file pointer position                                                ;;

;;------------------------------------------------------------------------------------------------;;

;# call `file.err` to obtain extended error information                                           ;;

;;================================================================================================;;

	mov	eax, [_filed]

	mov	[eax + InternalFileInfo.Mode], 0

	mov	[eax + InternalFileInfo.FileName], 0

	invoke	mem.free, eax

	xor	eax, eax

	ret

endp

;;================================================================================================;;

;;////////////////////////////////////////////////////////////////////////////////////////////////;;

;;================================================================================================;;

;! Exported functions section                                                                     ;;

;;================================================================================================;;

;;////////////////////////////////////////////////////////////////////////////////////////////////;;

;;================================================================================================;;

align 16

@EXPORT:

export					      \

	libio._.init	, 'lib_init'	    , \

	0x00040004	, 'version'	    , \

	file.find_first , 'file_find_first' , \

	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'