#define d0 %eax
#define d1 %ebx
#define a0 %ecx
#define a1 %edx
#define a2 %ebp
#define a3 %esi
#define a4 %edi
#define a5 %esp
#define sp %esp

// # saved registers: %ebx %esi %edi %ebp
// #                   d1   a3   a4   a2

	.data
#if defined (DOS) || defined (_WINDOWS_) || defined (ELF)
	.align	8
#else
	.align	3
#endif

tmp_real:	.double	0
freadstring_error:
	.ascii	"Error in freadsubstring parameters."
	.byte	10,0
	.byte	0,0,0
fwritestring_error:
	.ascii	"Error in fwritesubstring parameters."
	.byte	10,0
	.byte	0,0
	.text

	.globl	stdioF
	.globl	stderrF
	.globl	openF
	.globl	closeF
	.globl	reopenF
	.globl	readFC
	.globl	readFI
	.globl	readFR
	.globl	readFS
#ifndef LINUX
	.globl	readFString
#endif
	.globl	readLineF
	.globl	writeFC
	.globl	writeFI
	.globl	writeFR
	.globl	writeFS
#ifndef LINUX
	.globl	writeFString
#endif
	.globl	endF
	.globl	errorF
	.globl	positionF
	.globl	seekF
	.globl	shareF
#ifndef LINUX
	.globl	flushF
#endif	
	.globl	openSF
	.globl	readSFC
	.globl	readSFI
	.globl	readSFR
	.globl	readSFS
	.globl	readLineSF
	.globl	endSF
	.globl	positionSF
	.globl	seekSF

// # imports

	.globl	@open_file
	.globl	@open_stdio
	.globl	@open_stderr
	.globl	@re_open_file
	.globl	@close_file
	.globl	@file_read_char
	.globl	@file_read_int
	.globl	@file_read_real
#ifdef LINUX
	.globl	@file_read_string
#else
	.globl	@file_read_characters
#endif
	.globl	@file_read_line
	.globl	@file_write_char
	.globl	@file_write_int
	.globl	@file_write_real
#ifdef LINUX
	.globl	@file_write_string
#else
	.globl	@file_write_characters
#endif
	.globl	@file_end
	.globl	@file_error
	.globl	@file_position
	.globl	@file_seek
	.globl	@file_share
#ifndef LINUX
	.globl	@flush_file_buffer
#endif
	.globl	@open_s_file
	.globl	@file_read_s_char
	.globl	@file_read_s_int
	.globl	@file_read_s_real
	.globl	@file_read_s_string
	.globl	@file_read_s_line
	.globl	@file_s_end
	.globl	@file_s_position
	.globl	@file_s_seek

	.globl	collect_0
	.globl	collect_1

	.globl	__STRING__

stdioF:	call	@open_stdio
	movl	d0,d1
	movl	$-1,d0
	ret

stderrF:	call	@open_stderr
	movl	d0,d1
	movl	$-1,d0
	ret

openF:	pushl	d0
	addl	$4,a0
	pushl	a0
	call	@open_file
	addl	$8,sp

	xorl	d1,d1
	testl	d0,d0
	setns	%bl
	movl	(sp),a2
	movl	$-1,(sp)
	jmp	*a2

closeF:	pushl	d1
	call	@close_file
	addl	$4,sp
	ret

reopenF:
// #	popl	d0
// #	pushl	d0
	pushl	d1
	call	@re_open_file
	addl	$8,sp

	xchg	d0,d1
	
	movl	(sp),a2
	movl	$-1,(sp)
	jmp	*a2

readFC:
	pushl	d1

	pushl	d1
	call	@file_read_char
	addl	$4,sp

	movl	4(sp),a2
	movl	$-1,4(sp)

	cmpl	$-1,d0
	je	readFC_eof

	movl	$1,d1
	jmp	*a2

readFC_eof:
	xorl	d0,d0
	xorl	d1,d1
	jmp	*a2

readFI:
	pushl	d1

	subl	$8,sp
	lea	4(sp),a2
	movl	a2,(sp)
	pushl	d1
	call	@file_read_int
	addl	$8,sp

	movl	d0,d1
	popl	d0

	movl	4(sp),a2
	movl	$-1,4(sp)
	jmp	*a2

readFR:
	pushl	$tmp_real
	pushl	d1
	finit
	call	@file_read_real
	addl	$8,sp

	fldl	tmp_real
	fstp	%st(1)
	
	xchg	d0,d1

	movl	(sp),a2
	movl	$-1,(sp)	
	jmp	*a2

#ifndef LINUX
readFString:
	movl	4(a0),a2
	cmpl	a2,d1
	jae	readFString_error

	subl	d1,a2
	cmpl	a2,d0
	ja	readFString_error

	movl	(sp),a1
	pushl	a0

	pushl	d0
	movl	sp,a2
	lea	8(a0,d1),a0

	pushl	a0
	pushl	a2
	pushl	a1
	call	@file_read_characters
	addl	$12+4,sp

	popl	a0
	
	movl	d0,d1
	popl	d0
	
	addl	$4,sp
	popl	a2
	pushl	$-1
	jmp	*a2

readFString_error:
	movl	$freadstring_error,a2
	jmp	print_error
#endif

readFS:	popl	a1
	lea	3(a1),a2
	andl	$-4,a2
	lea	-32+8(a4,a2),a2
	cmpl	end_heap,a2
	ja	readFS_gc
readFS_r_gc:

#ifdef LINUX
	movl	$__STRING__+2,(a4)
	addl	$4,a4
	
	pushl	a4
	pushl	a1
	pushl	d1
	call	@file_read_string
	addl	$12,sp
#else
	movl	$__STRING__+2,(a4)

	lea	8(a4),a2
	addl	$4,a4

	pushl	a2
	movl	a1,(a4)
	pushl	a4	
	pushl	d1
	call	@file_read_characters
	addl	$12,sp	
#endif
readFS_end:
	lea	-4(a4),a0

	addl	$3,d0
	andl	$-4,d0
	lea	4(a4,d0),a4

	movl	$-1,d0
	ret

readFS_gc:	pushl	a1
	call	collect_0l
	popl	a1
	jmp	readFS_r_gc

readLineF:
	lea	-32+(4*(32+2))(a4),a2
	cmpl	end_heap,a2
	ja	readLineF_gc

readLineF_r_gc:
	movl	$__STRING__+2,(a4)
	lea	8(a4),a0
	addl	$4,a4

	pushl	a0
	movl	end_heap,a1
	addl	$32-4,a1
	subl	a4,a1
	pushl	a1
	pushl	d1
	call	@file_read_line
	addl	$12,sp

	movl	d0,(a4)

	testl	d0,d0
	jns	readFS_end

	lea	-4(a4),a0

readLineF_again:
	movl	end_heap,a1
	addl	$32,a1
	lea	-8(a1),d0
	subl	a0,d0
	movl	d0,4(a0)
	movl	a1,a4

	lea	-32+4*(32+2)(a4,d0),a2
	call	collect_1l

	movl	4(a0),d0
	lea	8(a0),a1
	
	pushl	a4

	movl	$__STRING__+2,(a4)

	lea	3(d0),a0
	shr	$2,a0

	movl	d0,4(a4)
	addl	$8,a4
	jmp	st_copy_string1

copy_st_lp1:
	movl	(a1),a2
	addl	$4,a1
	movl	a2,(a4)
	addl	$4,a4
st_copy_string1:
	subl	$1,a0
	jnc	copy_st_lp1

	pushl	a4
	movl	end_heap,a2
	addl	$32,a2
	subl	a4,a2
	pushl	a2
	pushl	d1
	call	@file_read_line
	addl	$12,sp

	popl	a0

	testl	d0,d0
	js	readLineF_again

	addl	d0,4(a0)
	addl	$3,d0
	andl	$-4,d0
	addl	d0,a4

	movl	$-1,d0
	ret

readLineF_gc:
	call	collect_0l
	jmp	readLineF_r_gc

writeFC:
	movl	d0,(sp)
	pushl	d1
	movl	d0,d1
	call	@file_write_char
	addl	$8,sp

	movl	$-1,d0
	ret

writeFI:
	movl	d0,(sp)
	pushl	d1
	movl	d0,d1
	call	@file_write_int
	addl	$8,sp

	movl	$-1,d0
	ret

writeFR:
	pushl	d1
	subl	$8,sp
	fstpl	(sp)
	finit
 	call	@file_write_real
	addl	$12,sp

	movl	$-1,d0
	ret

writeFS:
	pushl	d1
#ifdef LINUX
	addl	$4,a0
	pushl	a0
	call	@file_write_string
	addl	$8,sp
#else
	pushl	4(a0)
	addl	$8,a0
	pushl	a0
	call	@file_write_characters
	addl	$12,sp
#endif
	movl	$-1,d0
	ret

#ifndef LINUX
writeFString:
	movl	4(a0),a2
	cmpl	a2,d1
	jae	writeFString_error

	subl	d1,a2
	cmpl	a2,d0
	ja	writeFString_error

	lea	8(a0,d1),a0
	movl	(sp),d1

	pushl	d0
	pushl	a0
	call	@file_write_characters
	addl	$12+4,sp

	movl	$-1,d0

	ret

writeFString_error:
	movl	$fwritestring_error,a2
	jmp	print_error
#endif

endF:
	pushl	d1
	call	@file_end
	addl	$4,sp

	xchg	d0,d1

	movl	(sp),a2
	movl	$-1,(sp)
	jmp	*a2

errorF:
	pushl	d1
	call	@file_error
	addl	$4,sp

	xchg	d0,d1

	movl	(sp),a2
	movl	$-1,(sp)
	jmp	*a2

positionF:
	pushl	d1
	call	@file_position
	addl	$4,sp

	xchg	d0,d1

	movl	(sp),a2
	movl	$-1,(sp)
	jmp	*a2

seekF:
	pushl	d1
	call	@file_seek
	addl	$12,sp

	xchg	d0,d1

	movl	(sp),a2
	movl	$-1,(sp)
	jmp	*a2

shareF:
	pushl	d1
	call	@file_share
	addl	$4,sp
	
	movl	$-1,d0
	ret

#ifndef LINUX
flushF:
	pushl	d1
	call	@flush_file_buffer
	movl	4(sp),a2
	xchg	d0,d1
	movl	$-1,4(sp)
	movl	a2,(sp)
	ret
#endif

openSF:	pushl	d0
	addl	$4,a0
	pushl	a0
	call	@open_s_file
	addl	$8,sp

	xorl	d1,d1
	testl	d0,d0
	setns	%bl

	movl	(sp),a2
	movl	$0,(sp)
	jmp	*a2

readSFC:
	pushl	d0
	movl	sp,a2
	pushl	a2
	pushl	d1
	call	@file_read_s_char
	addl	$8,sp

	popl	a0
	popl	a2

	pushl	a0
	pushl	d1

	cmpl	$-1,d0
	je	readSFC_eof

	movl	$1,d1
	jmp	*a2

readSFC_eof:
	xorl	d0,d0
	xorl	d1,d1
	jmp	*a2

readSFI:
	pushl	d0
	movl	sp,a2
	subl	$4,sp
	pushl	a2
	subl	$4,a2
	pushl	a2
	pushl	d1
	call	@file_read_s_int
	addl	$12,sp

	popl	a0
	popl	a1
	popl	a2

	pushl	a1
	pushl	d1
	movl	d0,d1
	movl	a0,d0
	jmp	*a2

readSFR:
	pushl	d0
	movl	sp,a2
	pushl	a2
	pushl	$tmp_real
	pushl	d1
	finit
	call	@file_read_s_real
	addl	$12,sp

	fldl	tmp_real
	xchg	d0,d1
	fstp	%st(1)

	popl	a0
	movl	(sp),a2
	movl	a0,(sp)
	jmp	*a2

readSFS:
	popl	a1
	lea	3(a1),a2
	andl	$-4,a2
	lea	-32+8(a4,a2),a2
	cmpl	end_heap,a2
	ja	readSFS_gc

readSFS_r_gc:
	movl	$__STRING__+2,(a4)
	addl	$4,a4

	pushl	d0
	movl	sp,a2
	pushl	a2
	pushl	a4
	pushl	a1
	pushl	d1
	call	@file_read_s_string
	addl	$16,sp

readSFS_end:
	lea	-4(a4),a0

	addl	$3,d0
	andl	$-4,d0
	lea	4(a4,d0),a4

	popl	d0
	ret

readSFS_gc:	pushl	a1
	call	collect_0l
	popl	a1
	jmp	readSFS_r_gc

readLineSF:
	lea	-32+(4*(32+2))(a4),a2
	cmpl	end_heap,a2
	ja	readLineSF_gc

readLineSF_r_gc:
	movl	$__STRING__+2,(a4)
	lea	8(a4),a0
	addl	$4,a4

	pushl	d0
	movl	sp,a2
	pushl	a2
	pushl	a0
	movl	end_heap,a1
	addl	$32-4,a1
	subl	a4,a1
	pushl	a1
	pushl	d1
	call	@file_read_s_line
	addl	$16,sp

	movl	d0,(a4)

	testl	d0,d0
	jns	readSFS_end

	lea	-4(a4),a0

readLineSF_again:
	movl	end_heap,a1
	addl	$32,a1
	lea	-8(a1),d0
	subl	a0,d0
	movl	d0,(a4)
	movl	a1,a4

	lea	-32+4*(32+2)(a4,d0),a2
	call	collect_1l

	movl	4(a0),d0
	lea	8(a0),a1

	pushl	a4

	movl	$__STRING__+2,(a4)

	lea	3(d0),a0
	shr	$2,a0

	movl	d0,4(a4)
	addl	$8,a4
	jmp	st_copy_string2

copy_st_lp2:
	movl	(a1),a2
	addl	$4,a1
	movl	a2,(a4)
	addl	$4,a4
st_copy_string2:
	subl	$1,a0
	jnc	copy_st_lp2

	lea	4(sp),a2
	pushl	a2
	pushl	a4
	movl	end_heap,a2
	addl	$32,a2
	subl	a4,a2
	pushl	a2
	pushl	d1
	call	@file_read_s_line
	addl	$16,sp

	popl	a0

	testl	d0,d0
	js	readLineSF_again
	
	addl	d0,4(a0)
	addl	$3,d0
	andl	$-4,d0
	addl	d0,a4

	popl	d0
	ret

readLineSF_gc:
	call	collect_0l
	jmp	readLineSF_r_gc

endSF:
	pushl	d0
	pushl	d1
	call	@file_s_end
	addl	$8,sp
	ret

positionSF:
	pushl	d0
	pushl	d1
	call	@file_s_position
	addl	$8,sp
	ret

seekSF:
	popl	a1
	popl	a0

	pushl	d0
	movl	sp,a2
	pushl	a2
	pushl	a0
	pushl	a1
	pushl	d1
	call	@file_s_seek
	addl	$16,sp

	popl	a0

	xchg	d0,d1

	movl	(sp),a2
	movl	a0,(sp)
	jmp	*a2