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pull/2/head
Jørn Guldberg 6 years ago
parent
c7ad92b3b2
commit
e12768398d
4 changed files with 249 additions and 131 deletions
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  1. BIN
      disk.out
  2. 8
      main.c
  3. 316
      main.s
  4. 54
      std_singos/string.h

BIN
disk.out
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8
main.c
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@ -111,9 +111,10 @@ void* pointer_parameter_struct;
Parameter_Struct parameter_struct; Parameter_Struct parameter_struct;
int local_segment = 0x7e0; int local_segment = 0x7e0;
int stack_segment = 0x8fc0; int stack_segment = 0x8fc0;
int path_length;
long index_as_long; long index_as_long;
char local_path[256]; //= "Hello world\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"; char local_path[256];
service_action = selector; service_action = selector;
switch (service_action) switch (service_action)
@ -134,7 +135,10 @@ void* pointer_parameter_struct;
case SERVICE_FIND_ENTRY: case SERVICE_FIND_ENTRY:
{ {
memcpy(&parameter_struct, stack_segment, pointer_parameter_struct, pointer_parameter_segment, sizeof(Parameter_Struct)); memcpy(&parameter_struct, stack_segment, pointer_parameter_struct, pointer_parameter_segment, sizeof(Parameter_Struct));
dump_ax(parameter_struct.buffer_size); path_length = strlen(parameter_struct.path, pointer_parameter_segment);
memcpy(local_path, stack_segment, parameter_struct.path, pointer_parameter_segment, path_length);
local_path[path_length] = 0;
print_stack(local_path);
print_newline(); print_newline();
disk_service_read_data_from_disk(fsci.master_table_index[0], DEFAULT_TABLE_SIZE, &current_table, stack_segment); disk_service_read_data_from_disk(fsci.master_table_index[0], DEFAULT_TABLE_SIZE, &current_table, stack_segment);
print("Current table: "); print("Current table: ");

316
main.s
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@ -12,22 +12,64 @@ retf
! 1 # 1 "std_singos/string.h" ! 1 # 1 "std_singos/string.h"
! 1 void strcpy (destination, destination_segment, source, source_segment ); ! 1 void strcpy (destination, destination_segment, source, source_segment );
!BCC_EOS !BCC_EOS
! 2 void memcpy (destination, destination_segment, source, source_segment, num_bytes ); ! 2 int strlen (source, source_segment);
!BCC_EOS !BCC_EOS
! 3 ! 3 void memcpy (destination, destination_segment, source, source_segment, num_bytes );
! 4 void strcpy (destination, destination_segment, source, source_segment ) !BCC_EOS
! 5 char *destination; ! 4
! 5 int strlen (source, source_segment)
! 6 {
export _strlen
_strlen:
! 7 #asm
!BCC_ASM
_strlen.source set 2
_strlen.source_segment set 4
push bp
mov bp,sp
push ds
push bx
mov ax, 6[bp];
mov ds, ax
mov bx, 4[bp];
label_strlen:
mov cx, #0x0 ; Set counte to zero
.label_strlen_loop:
mov BYTE al, [bx]
cmp al, #0x0
je .label_strlen_done
inc cx ; Count 1
inc bx ; Look at next char
jmp .label_strlen_loop
.label_strlen_done:
mov ax, cx
pop bx
pop ds
pop bp
! 35 endasm
!BCC_ENDASM
! 36 }
ret
! 37
! 38 void strcpy (destination, destination_segment, source, source_segment )
! 39 char *destination;
export _strcpy export _strcpy
_strcpy: _strcpy:
!BCC_EOS !BCC_EOS
! 6 int destination_segment; ! 40 int destination_segment;
!BCC_EOS !BCC_EOS
! 7 char *source; ! 41 char *source;
!BCC_EOS !BCC_EOS
! 8 int source_segment; ! 42 int source_segment;
!BCC_EOS !BCC_EOS
! 9 { ! 43 {
! 10 #asm ! 44 #asm
!BCC_ASM !BCC_ASM
_strcpy.source set 6 _strcpy.source set 6
_strcpy.destination set 2 _strcpy.destination set 2
@ -38,11 +80,11 @@ _strcpy.destination_segment set 4
; IN di: the second (zero terminated) string ; IN di: the second (zero terminated) string
; OUT SF and ZF (same semantics as cmp) ; OUT SF and ZF (same semantics as cmp)
! 16 20 ! 50 54
push bp push bp
mov bp,sp mov bp,sp
stringcompare: label_strcpy:
push ax push ax
push bx push bx
push di push di
@ -58,13 +100,13 @@ _strcpy.destination_segment set 4
mov ax, 10[bp]; ; mov ax, 10[bp]; ;
mov ds, ax mov ds, ax
mov cx, 0x050 mov cx, 0x050
.loop: .label_strcpy_loop:
movsb movsb
cmp cx, 0x0 cmp cx, 0x0
je .end je .label_strcpy_end
dec cx dec cx
jmp .loop jmp .label_strcpy_loop
.end: .label_strcpy_end:
pop ds pop ds
pop si pop si
pop es pop es
@ -73,26 +115,26 @@ _strcpy.destination_segment set 4
pop ax pop ax
pop bp pop bp
! 54 endasm ! 88 endasm
!BCC_ENDASM !BCC_ENDASM
! 55 } ! 89 }
ret ret
! 56 ! 90
! 57 void memcpy (destination, destination_segment, source, source_segment, num_bytes) ! 91 void memcpy (destination, destination_segment, source, source_segment, num_bytes)
! 58 void *destination; ! 92 void *destination;
export _memcpy export _memcpy
_memcpy: _memcpy:
!BCC_EOS !BCC_EOS
! 59 int destination_segment; ! 93 int destination_segment;
!BCC_EOS !BCC_EOS
! 60 void *source; ! 94 void *source;
!BCC_EOS !BCC_EOS
! 61 int source_segment; ! 95 int source_segment;
!BCC_EOS !BCC_EOS
! 62 int num_bytes; ! 96 int num_bytes;
!BCC_EOS !BCC_EOS
! 63 { ! 97 {
! 64 #asm ! 98 #asm
!BCC_ASM !BCC_ASM
_memcpy.source set 6 _memcpy.source set 6
_memcpy.destination set 2 _memcpy.destination set 2
@ -104,11 +146,11 @@ _memcpy.destination_segment set 4
; IN di: the second (zero terminated) string ; IN di: the second (zero terminated) string
; OUT SF and ZF (same semantics as cmp) ; OUT SF and ZF (same semantics as cmp)
! 70 75 ! 104 109
push bp push bp
mov bp,sp mov bp,sp
memcpy: label_memcpy:
push ax push ax
push bx push bx
push di push di
@ -124,13 +166,13 @@ _memcpy.destination_segment set 4
mov ax, 10[bp]; ; mov ax, 10[bp]; ;
mov ds, ax mov ds, ax
mov cx, 12[bp]; mov cx, 12[bp];
.memcpy_loop: .label_memcpy_loop:
movsb movsb
cmp cx, 0x0 cmp cx, 0x0
je .end je .label_memcpy_end
dec cx dec cx
jmp .loop jmp .label_memcpy_loop
.memcpy_end: .label_memcpy_end:
pop ds pop ds
pop si pop si
pop es pop es
@ -139,13 +181,12 @@ _memcpy.destination_segment set 4
pop ax pop ax
pop bp pop bp
! 109 endasm ! 143 endasm
!BCC_ENDASM !BCC_ENDASM
! 110 # 6 "main.c" ! 144 # 6 "main.c"
! 6 } ! 6 }
ret ret
! 7 # 1 "std_ ! 7 # 1 "std_singos/stdio.h"
! 0 singos/stdio.h"
! 1 void print(string); ! 1 void print(string);
!BCC_EOS !BCC_EOS
! 2 ! 2
@ -341,8 +382,7 @@ ret
! 12 ! 12
! 13 #define DEFAULT_ENTRY_SIZE 1 ! 13 #define DEFAULT_ENTRY_SIZE 1
! 14 ! 14
! 15 #def ! 15 #define NUMBER_OF_MBR_PARTITIONS 4
! 15 ine NUMBER_OF_MBR_PARTITIONS 4
! 16 ! 16
! 17 #define DEFAULT_DATA_POINTER_SIZE 4 ! 17 #define DEFAULT_DATA_POINTER_SIZE 4
! 18 ! 18
@ -428,7 +468,8 @@ ret
!BCC_EOS !BCC_EOS
! 71 long this_partition_offset_on_disk[2]; ! 71 long this_partition_offset_on_disk[2];
!BCC_EOS !BCC_EOS
! 72 long next_free_sector[2]; ! 72 long next
! 72 _free_sector[2];
!BCC_EOS !BCC_EOS
! 73 long next_uniqe_id[2]; ! 73 long next_uniqe_id[2];
!BCC_EOS !BCC_EOS
@ -482,8 +523,7 @@ _main:
!BCC_EOS !BCC_EOS
! 102 void* pointer_parameter_segment; ! 102 void* pointer_parameter_segment;
!BCC_EOS !BCC_EOS
! 103 void* pointer_parameter_struct ! 103 void* pointer_parameter_struct;
! 103 ;
!BCC_EOS !BCC_EOS
! 104 { ! 104 {
! 105 ! 105
@ -514,53 +554,55 @@ dec sp
mov ax,#$8FC0 mov ax,#$8FC0
mov -$221A[bp],ax mov -$221A[bp],ax
!BCC_EOS !BCC_EOS
! 114 long index_as_long; ! 114 int path_length;
!BCC_EOS !BCC_EOS
! 115 ! 115 long index_as_long;
! 116 char local_path[256];
!BCC_EOS !BCC_EOS
! 117 service_action = selector; ! 116
add sp,#-$104 ! 117 char local_path[256];
! Debug: eq int selector = [S+$2320+2] to int service_action = [S+$2320-$208] (used reg = ) !BCC_EOS
! 118 service_action = selector;
add sp,#-$106
! Debug: eq int selector = [S+$2322+2] to int service_action = [S+$2322-$208] (used reg = )
mov ax,4[bp] mov ax,4[bp]
mov -$206[bp],ax mov -$206[bp],ax
!BCC_EOS !BCC_EOS
! 118 ! 119
! 119 switch (service_action) ! 120 switch (service_action)
mov ax,-$206[bp] mov ax,-$206[bp]
! 120 { ! 121 {
br .3 br .3
! 121 case SERIVCE_LOAD_DISK: ! 122 case SERIVCE_LOAD_DISK:
! 122 { ! 123 {
.4: .4:
! 123
! 124 ! 124
! 125 ! 125
! 126 ! 126
! 127 index_as_long = pointer_parameter_struct; ! 127
! Debug: eq * void pointer_parameter_struct = [S+$2320+6] to long index_as_long = [S+$2320-$2220] (used reg = ) ! 128 index_as_long = pointer_parameter_struct;
! Debug: eq * void pointer_parameter_struct = [S+$2322+6] to long index_as_long = [S+$2322-$2222] (used reg = )
mov ax,8[bp] mov ax,8[bp]
xor bx,bx xor bx,bx
mov -$221E[bp],ax mov -$2220[bp],ax
mov -$221C[bp],bx mov -$221E[bp],bx
!BCC_EOS !BCC_EOS
! 128 disk_service_read_data_from_disk(index_as_long, 1, &fsci, stack_segment); ! 129 disk_service_read_data_from_disk(index_as_long, 1, &fsci, stack_segment);
! Debug: list int stack_segment = [S+$2320-$221C] (used reg = ) ! Debug: list int stack_segment = [S+$2322-$221C] (used reg = )
push -$221A[bp] push -$221A[bp]
! Debug: list * struct File_System_Control_Information fsci = S+$2322-$206 (used reg = ) ! Debug: list * struct File_System_Control_Information fsci = S+$2324-$206 (used reg = )
lea bx,-$204[bp] lea bx,-$204[bp]
push bx push bx
! Debug: list int = const 1 (used reg = ) ! Debug: list int = const 1 (used reg = )
mov ax,*1 mov ax,*1
push ax push ax
! Debug: list long index_as_long = [S+$2326-$2220] (used reg = ) ! Debug: list long index_as_long = [S+$2328-$2222] (used reg = )
push -$221C[bp]
push -$221E[bp] push -$221E[bp]
push -$2220[bp]
! Debug: func () int = disk_service_read_data_from_disk+0 (used reg = ) ! Debug: func () int = disk_service_read_data_from_disk+0 (used reg = )
call _disk_service_read_data_from_disk call _disk_service_read_data_from_disk
add sp,*$A add sp,*$A
!BCC_EOS !BCC_EOS
! 129 print("File System has been loaded: "); ! 130 print("File System has been loaded: ");
! Debug: list * char = .5+0 (used reg = ) ! Debug: list * char = .5+0 (used reg = )
mov bx,#.5 mov bx,#.5
push bx push bx
@ -569,12 +611,12 @@ call _print
inc sp inc sp
inc sp inc sp
!BCC_EOS !BCC_EOS
! 130 print_newline(); ! 131 print_newline();
! Debug: func () void = print_newline+0 (used reg = ) ! Debug: func () void = print_newline+0 (used reg = )
call _print_newline call _print_newline
!BCC_EOS !BCC_EOS
! 131 print_stack(fsci.filesystem_information); ! 132 print_stack(fsci.filesystem_information);
! Debug: list * char fsci = S+$2320-$206 (used reg = ) ! Debug: list * char fsci = S+$2322-$206 (used reg = )
lea bx,-$204[bp] lea bx,-$204[bp]
push bx push bx
! Debug: func () void = print_stack+0 (used reg = ) ! Debug: func () void = print_stack+0 (used reg = )
@ -582,62 +624,99 @@ call _print_stack
inc sp inc sp
inc sp inc sp
!BCC_EOS !BCC_EOS
! 132 print_newline(); ! 133 print_newline();
! Debug: func () void = print_newline+0 (used reg = ) ! Debug: func () void = print_newline+0 (used reg = )
call _print_newline call _print_newline
!BCC_EOS !BCC_EOS
! 133 } break; ! 134 } break;
br .1 br .1
!BCC_EOS !BCC_EOS
! 134 case SERVICE_FIND_ENTRY: ! 135 case SERVICE_FIND_ENTRY:
! 135 { ! 136 {
.6: .6:
! 136 memcpy(&parameter_struct, stack_segment, pointer_parameter_struct, pointer_parameter_segment, sizeof(Parameter_Struct)); ! 137 memcpy(&parameter_struct, stack_segment, pointer_parameter_struct, pointer_parameter_segment, sizeof(Parameter_Struct));
! Debug: list int = const $10 (used reg = ) ! Debug: list int = const $10 (used reg = )
mov ax,*$10 mov ax,*$10
push ax push ax
! Debug: list * void pointer_parameter_segment = [S+$2322+4] (used reg = ) ! Debug: list * void pointer_parameter_segment = [S+$2324+4] (used reg = )
push 6[bp] push 6[bp]
! Debug: list * void pointer_parameter_struct = [S+$2324+6] (used reg = ) ! Debug: list * void pointer_parameter_struct = [S+$2326+6] (used reg = )
push 8[bp] push 8[bp]
! Debug: list int stack_segment = [S+$2326-$221C] (used reg = ) ! Debug: list int stack_segment = [S+$2328-$221C] (used reg = )
push -$221A[bp] push -$221A[bp]
! Debug: list * struct Parameter_Struct parameter_struct = S+$2328-$2218 (used reg = ) ! Debug: list * struct Parameter_Struct parameter_struct = S+$232A-$2218 (used reg = )
lea bx,-$2216[bp] lea bx,-$2216[bp]
push bx push bx
! Debug: func () void = memcpy+0 (used reg = ) ! Debug: func () void = memcpy+0 (used reg = )
call _memcpy call _memcpy
add sp,*$A add sp,*$A
!BCC_EOS !BCC_EOS
! 137 dump_ax(parameter_struct.buffer_size); ! 138 path_length = strlen(parameter_struct.path, pointer_parameter_segment);
! Debug: list int parameter_struct = [S+$2320-$2210] (used reg = ) ! Debug: list * void pointer_parameter_segment = [S+$2322+4] (used reg = )
push -$220E[bp] push 6[bp]
! Debug: func () void = dump_ax+0 (used reg = ) ! Debug: list * char parameter_struct = [S+$2324-$2218] (used reg = )
call _dump_ax push -$2216[bp]
! Debug: func () int = strlen+0 (used reg = )
call _strlen
add sp,*4
! Debug: eq int = ax+0 to int path_length = [S+$2322-$221E] (used reg = )
mov -$221C[bp],ax
!BCC_EOS
! 139 memcpy(local_path, stack_segment, parameter_struct.path, pointer_parameter_segment, path_length);
! Debug: list int path_length = [S+$2322-$221E] (used reg = )
push -$221C[bp]
! Debug: list * void pointer_parameter_segment = [S+$2324+4] (used reg = )
push 6[bp]
! Debug: list * char parameter_struct = [S+$2326-$2218] (used reg = )
push -$2216[bp]
! Debug: list int stack_segment = [S+$2328-$221C] (used reg = )
push -$221A[bp]
! Debug: list * char local_path = S+$232A-$2322 (used reg = )
lea bx,-$2320[bp]
push bx
! Debug: func () void = memcpy+0 (used reg = )
call _memcpy
add sp,*$A
!BCC_EOS
! 140 local_path[path_length] = 0;
! Debug: ptradd int path_length = [S+$2322-$221E] to [$100] char local_path = S+$2322-$2322 (used reg = )
mov ax,-$221C[bp]
mov bx,bp
add bx,ax
! Debug: eq int = const 0 to char = [bx-$2320] (used reg = )
xor al,al
mov -$2320[bx],al
!BCC_EOS
! 141 print_stack(local_path);
! Debug: list * char local_path = S+$2322-$2322 (used reg = )
lea bx,-$2320[bp]
push bx
! Debug: func () void = print_stack+0 (used reg = )
call _print_stack
inc sp inc sp
inc sp inc sp
!BCC_EOS !BCC_EOS
! 138 print_newline(); ! 142 print_newline();
! Debug: func () void = print_newline+0 (used reg = ) ! Debug: func () void = print_newline+0 (used reg = )
call _print_newline call _print_newline
!BCC_EOS !BCC_EOS
! 139 disk_service_read_data_from_disk(fsci.master_table_index[0], 16 , &current_table, stack_segment); ! 143 disk_service_read_data_from_disk(fsci.master_table_index[0], 16 , &current_table, stack_segment);
! Debug: list int stack_segment = [S+$2320-$221C] (used reg = ) ! Debug: list int stack_segment = [S+$2322-$221C] (used reg = )
push -$221A[bp] push -$221A[bp]
! Debug: list * struct Directory_Table current_table = S+$2322-$2208 (used reg = ) ! Debug: list * struct Directory_Table current_table = S+$2324-$2208 (used reg = )
lea bx,-$2206[bp] lea bx,-$2206[bp]
push bx push bx
! Debug: list int = const $10 (used reg = ) ! Debug: list int = const $10 (used reg = )
mov ax,*$10 mov ax,*$10
push ax push ax
! Debug: list long fsci = [S+$2326-$106] (used reg = ) ! Debug: list long fsci = [S+$2328-$106] (used reg = )
push -$102[bp] push -$102[bp]
push -$104[bp] push -$104[bp]
! Debug: func () int = disk_service_read_data_from_disk+0 (used reg = ) ! Debug: func () int = disk_service_read_data_from_disk+0 (used reg = )
call _disk_service_read_data_from_disk call _disk_service_read_data_from_disk
add sp,*$A add sp,*$A
!BCC_EOS !BCC_EOS
! 140 print("Current table: "); ! 144 print("Current table: ");
! Debug: list * char = .7+0 (used reg = ) ! Debug: list * char = .7+0 (used reg = )
mov bx,#.7 mov bx,#.7
push bx push bx
@ -646,12 +725,13 @@ call _print
inc sp inc sp
inc sp inc sp
!BCC_EOS !BCC_EOS
! 141 print_newline(); ! 145 print_newline(
! 145 );
! Debug: func () void = print_newline+0 (used reg = ) ! Debug: func () void = print_newline+0 (used reg = )
call _print_newline call _print_newline
!BCC_EOS !BCC_EOS
! 142 print_stack(current_table.entries[0].filename); ! 146 print_stack(current_table.entries[0].filename);
! Debug: list * char current_table = S+$2320-$2208 (used reg = ) ! Debug: list * char current_table = S+$2322-$2208 (used reg = )
lea bx,-$2206[bp] lea bx,-$2206[bp]
push bx push bx
! Debug: func () void = print_stack+0 (used reg = ) ! Debug: func () void = print_stack+0 (used reg = )
@ -659,12 +739,12 @@ call _print_stack
inc sp inc sp
inc sp inc sp
!BCC_EOS !BCC_EOS
! 143 print_newline(); ! 147 print_newline();
! Debug: func () void = print_newline+0 (used reg = ) ! Debug: func () void = print_newline+0 (used reg = )
call _print_newline call _print_newline
!BCC_EOS !BCC_EOS
! 144 print_stack(current_table.entries[1].filename); ! 148 print_stack(current_table.entries[1].filename);
! Debug: list * char current_table = S+$2320-$2008 (used reg = ) ! Debug: list * char current_table = S+$2322-$2008 (used reg = )
lea bx,-$2006[bp] lea bx,-$2006[bp]
push bx push bx
! Debug: func () void = print_stack+0 (used reg = ) ! Debug: func () void = print_stack+0 (used reg = )
@ -672,12 +752,12 @@ call _print_stack
inc sp inc sp
inc sp inc sp
!BCC_EOS !BCC_EOS
! 145 print_newline(); ! 149 print_newline();
! Debug: func () void = print_newline+0 (used reg = ) ! Debug: func () void = print_newline+0 (used reg = )
call _print_newline call _print_newline
!BCC_EOS !BCC_EOS
! 146 print_stack(current_table.entries[2].filename); ! 150 print_stack(current_table.entries[2].filename);
! Debug: list * char current_table = S+$2320-$1E08 (used reg = ) ! Debug: list * char current_table = S+$2322-$1E08 (used reg = )
lea bx,-$1E06[bp] lea bx,-$1E06[bp]
push bx push bx
! Debug: func () void = print_stack+0 (used reg = ) ! Debug: func () void = print_stack+0 (used reg = )
@ -685,19 +765,19 @@ call _print_stack
inc sp inc sp
inc sp inc sp
!BCC_EOS !BCC_EOS
! 147 print_newline(); ! 151 print_newline();
! Debug: func () void = print_newline+0 (used reg = ) ! Debug: func () void = print_newline+0 (used reg = )
call _print_newline call _print_newline
!BCC_EOS !BCC_EOS
! 148 } break; ! 152 } break;
jmp .1 jmp .1
!BCC_EOS !BCC_EOS
! 149 case SERIVCE_READ_DATA: ! 153 case SERIVCE_READ_DATA:
! 150 { ! 154 {
.8: .8:
! 151 # 159 ! 155 # 163
! 159 ! 163
! 160 print("Hit READ case"); ! 164 print("Hit READ case");
! Debug: list * char = .9+0 (used reg = ) ! Debug: list * char = .9+0 (used reg = )
mov bx,#.9 mov bx,#.9
push bx push bx
@ -706,13 +786,13 @@ call _print
inc sp inc sp
inc sp inc sp
!BCC_EOS !BCC_EOS
! 161 } break; ! 165 } break;
jmp .1 jmp .1
!BCC_EOS !BCC_EOS
! 162 case SERIVCE_WRITE_DATA: ! 166 case SERIVCE_WRITE_DATA:
! 163 { ! 167 {
.A: .A:
! 164 print("Hit WRITE case"); ! 168 print("Hit WRITE case");
! Debug: list * char = .B+0 (used reg = ) ! Debug: list * char = .B+0 (used reg = )
mov bx,#.B mov bx,#.B
push bx push bx
@ -721,13 +801,13 @@ call _print
inc sp inc sp
inc sp inc sp
!BCC_EOS !BCC_EOS
! 165 } break; ! 169 } break;
jmp .1 jmp .1
!BCC_EOS !BCC_EOS
! 166 default: ! 170 default:
! 167 { ! 171 {
.C: .C:
! 168 print("Default case"); ! 172 print("Default case");
! Debug: list * char = .D+0 (used reg = ) ! Debug: list * char = .D+0 (used reg = )
mov bx,#.D mov bx,#.D
push bx push bx
@ -736,10 +816,10 @@ call _print
inc sp inc sp
inc sp inc sp
!BCC_EOS !BCC_EOS
! 169 } ! 173 }
! 170 } ! 174 }
! 171 ! 175
! 172 return 0; ! 176 return 0;
jmp .1 jmp .1
.3: .3:
sub ax,*1 sub ax,*1
@ -752,7 +832,7 @@ sub ax,*1
je .A je .A
jmp .C jmp .C
.1: .1:
..FFFF = -$2320 ..FFFF = -$2322
xor ax,ax xor ax,ax
lea sp,-4[bp] lea sp,-4[bp]
pop si pop si
@ -760,9 +840,9 @@ pop di
pop bp pop bp
ret ret
!BCC_EOS !BCC_EOS
! 173 ! 177
! 174 } ! 178 }
! 175 ! 179
! Register BX used in function main ! Register BX used in function main
.D: .D:
.E: .E:

54
std_singos/string.h
View File

@ -1,6 +1,40 @@
void strcpy (destination, destination_segment, source, source_segment ); void strcpy (destination, destination_segment, source, source_segment );
int strlen (source, source_segment);
void memcpy (destination, destination_segment, source, source_segment, num_bytes ); void memcpy (destination, destination_segment, source, source_segment, num_bytes );
int strlen (source, source_segment)
{
#asm
#define strlen_SOURCE 4[bp];
#define strlen_SOURCE_SEGMENT 6[bp];
push bp
mov bp,sp
push ds
push bx
mov ax, strlen_SOURCE_SEGMENT
mov ds, ax
mov bx, strlen_SOURCE
label_strlen:
mov cx, #0x0 ; Set counte to zero
.label_strlen_loop:
mov BYTE al, [bx]
cmp al, #0x0
je .label_strlen_done
inc cx ; Count 1
inc bx ; Look at next char
jmp .label_strlen_loop
.label_strlen_done:
mov ax, cx
pop bx
pop ds
pop bp
#endasm
}
void strcpy (destination, destination_segment, source, source_segment ) void strcpy (destination, destination_segment, source, source_segment )
char *destination; char *destination;
int destination_segment; int destination_segment;
@ -20,7 +54,7 @@ int source_segment;
push bp push bp
mov bp,sp mov bp,sp
stringcompare: label_strcpy:
push ax push ax
push bx push bx
push di push di
@ -36,13 +70,13 @@ int source_segment;
mov ax, SOURCE_SEGMENT; mov ax, SOURCE_SEGMENT;
mov ds, ax mov ds, ax
mov cx, 0x050 // TODO(Jørn) Hardcded number of bytes to copy mov cx, 0x050 // TODO(Jørn) Hardcded number of bytes to copy
.loop: .label_strcpy_loop:
movsb movsb
cmp cx, 0x0 cmp cx, 0x0
je .end je .label_strcpy_end
dec cx dec cx
jmp .loop jmp .label_strcpy_loop
.end: .label_strcpy_end:
pop ds pop ds
pop si pop si
pop es pop es
@ -75,7 +109,7 @@ int num_bytes;
push bp push bp
mov bp,sp mov bp,sp
memcpy: label_memcpy:
push ax push ax
push bx push bx
push di push di
@ -91,13 +125,13 @@ int num_bytes;
mov ax, SOURCE_SEGMENT; mov ax, SOURCE_SEGMENT;
mov ds, ax mov ds, ax
mov cx, NUM_BYTES mov cx, NUM_BYTES
.memcpy_loop: .label_memcpy_loop:
movsb movsb
cmp cx, 0x0 cmp cx, 0x0
je .end je .label_memcpy_end
dec cx dec cx
jmp .loop jmp .label_memcpy_loop
.memcpy_end: .label_memcpy_end:
pop ds pop ds
pop si pop si
pop es pop es

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