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// This file is part of Adlib Tracker II (AT2).
//
// AT2 is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// AT2 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with AT2. If not, see <http://www.gnu.org/licenses/>.
unit StringIO;
{$S-,Q-,R-,V-,B-,X+}
{$PACKRECORDS 1}
interface
function byte2hex(value: Byte): String;
function byte2dec(value: Byte): String;
function Capitalize(str: String): String;
function Upper(str: String): String;
function Lower(str: String): String;
function ExpStrL(str: String; size: Byte; chr: Char): String;
function ExpStrR(str: String; size: Byte; chr: Char): String;
function DietStr(str: String; size: Byte): String;
function CutStr(str: String): String;
function FilterStr(str: String; chr0,chr1: Char): String;
function Num2str(num: Longint; base: Byte): String;
function Str2num(str: String; base: Byte): Longint;
function PathOnly(path: String): String;
function NameOnly(path: String): String;
function BaseNameOnly(path: String): String;
function ExtOnly(path: String): String;
implementation
uses
DOS;
function byte2hex(value: Byte): String;
const
data: array[0..15] of char = '0123456789ABCDEF';
begin
asm
mov edi,@RESULT
lea ebx,[data]
mov al,2
stosb
mov al,value
xor ah,ah
mov cl,16
div cl
xlat
stosb
mov al,ah
xlat
stosb
end;
end;
function byte2dec(value: Byte): String;
const
data: array[0..9] of char = '0123456789';
begin
asm
mov edi,@RESULT
lea ebx,[data]
mov al,value
xor ah,ah
mov cl,100
div cl
mov ch,ah
xchg ah,al
or ah,ah
jz @@1
mov al,3
stosb
xchg ah,al
xlat
stosb
mov al,ch
jmp @@2
@@1: mov al,2
stosb
mov al,value
@@2: xor ah,ah
mov cl,10
div cl
xlat
stosb
mov al,ah
xlat
stosb
end;
end;
function Capitalize(str: String): String;
begin
asm
lea esi,[str]
mov edi,@RESULT
mov al,[esi]
inc esi
mov [edi],al
inc edi
xor ecx,ecx
mov cl,al
jecxz @@4
mov al,[esi]
inc esi
cmp al,'a'
jb @@0
cmp al,'z'
ja @@0
sub al,20h
@@0: mov [edi],al
inc edi
@@1: mov ah,al
mov al,[esi]
inc esi
cmp ah,' '
jnz @@2
cmp al,'a'
jb @@2
cmp al,'z'
ja @@2
sub al,20h
jmp @@3
@@2: cmp al,'A'
jb @@3
cmp al,'Z'
ja @@3
add al,20h
@@3: mov [edi],al
inc edi
loop @@1
@@4:
end;
end;
function Upper(str: String): String;
begin
asm
lea esi,[str]
mov edi,@RESULT
mov al,[esi]
inc esi
mov [edi],al
inc edi
xor ecx,ecx
mov cl,al
jecxz @@3
@@1: mov al,[esi]
inc esi
cmp al,'a'
jb @@2
cmp al,'z'
ja @@2
sub al,20h
@@2: mov [edi],al
inc edi
loop @@1
@@3:
end;
end;
function Lower(str: String): String;
begin
asm
lea esi,[str]
mov edi,@RESULT
mov al,[esi]
inc esi
mov [edi],al
inc edi
xor ecx,ecx
mov cl,al
jecxz @@3
@@1: mov al,[esi]
inc esi
cmp al,'A'
jb @@2
cmp al,'Z'
ja @@2
add al,20h
@@2: mov [edi],al
inc edi
loop @@1
@@3:
end;
end;
function ExpStrL(str: String; size: Byte; chr: Char): String;
begin
asm
lea esi,[str]
mov edi,@RESULT
cld
xor ecx,ecx
lodsb
cmp al,size
jge @@1
mov ah,al
mov al,size
stosb
mov al,ah
mov cl,size
sub cl,al
mov al,chr
rep stosb
mov cl,ah
rep movsb
jmp @@2
@@1: stosb
mov cl,al
rep movsb
@@2:
end;
end;
function ExpStrR(str: String; size: Byte; chr: Char): String;
begin
asm
lea esi,[str]
mov edi,@RESULT
cld
xor ecx,ecx
lodsb
cmp al,size
jge @@1
mov ah,al
mov al,size
stosb
mov cl,ah
rep movsb
mov al,ah
mov cl,size
sub cl,al
mov al,chr
rep stosb
jmp @@2
@@1: stosb
mov cl,al
rep movsb
@@2:
end;
end;
function DietStr(str: String; size: Byte): String;
begin
If (Length(str) <= size) then
begin
DietStr := str;
EXIT;
end;
Repeat
Delete(str,size DIV 2,1)
until (Length(str)+3 = size);
Insert('...',str,size DIV 2);
DietStr := str
end;
function CutStr(str: String): String;
begin
While (str[0] <> #0) and (str[1] in [#00,#32]) do Delete(str,1,1);
While (str[0] <> #0) and (str[Length(str)] in [#00,#32]) do Delete(str,Length(str),1);
CutStr := str;
end;
function FilterStr(str: String; chr0,chr1: Char): String;
begin
asm
lea esi,[str]
mov edi,@RESULT
mov al,[esi]
inc esi
mov [edi],al
inc edi
xor ecx,ecx
mov cl,al
jecxz @@3
@@1: mov al,[esi]
inc esi
cmp al,chr0
jnz @@2
mov al,chr1
@@2: mov [edi],al
inc edi
loop @@1
@@3:
end;
end;
function Num2str(num: Longint; base: Byte): String;
const
hexa: array[0..PRED(16)+32] of Char = '0123456789ABCDEF'+
#0#0#0#0#0#0#0#0#0#0#0#0#0#0#0#0;
begin
asm
xor eax,eax
xor edx,edx
xor edi,edi
xor esi,esi
mov eax,num
xor ebx,ebx
mov bl,base
cmp bl,2
jb @@3
cmp bl,16
ja @@3
mov edi,32
@@1: dec edi
xor edx,edx
div ebx
mov esi,edx
mov dl,byte ptr [hexa+esi]
mov byte ptr [hexa+edi+16],dl
and eax,eax
jnz @@1
mov esi,edi
mov ecx,32
sub ecx,edi
mov edi,@RESULT
mov al,cl
stosb
@@2: mov al,byte ptr [hexa+esi+16]
stosb
inc esi
loop @@2
jmp @@4
@@3: mov edi,@RESULT
xor al,al
stosb
@@4:
end;
end;
const
digits: array[0..15] of Char = '0123456789ABCDEF';
function Digit2index(digit: Char): Byte;
var
index: Byte;
begin
digit := UpCase(digit);
index := 15;
While (index > 0) and (digit <> digits[index]) do Dec(index);
Digit2index := Index;
end;
function position_value(position,base: Byte): Longint;
var
value: Longint;
index: Byte;
begin
value := 1;
For index := 2 to position do value := value*base;
position_value := value;
end;
function Str2num(str: String; base: Byte): Longint;
var
value: Longint;
index: Byte;
begin
value := 0;
If (base in [2,10,16]) then
For index := 1 to Length(str) do
Inc(value,Digit2index(str[index])*
position_value(Length(str)-index+1,base));
Str2num := value;
end;
var
dir: DirStr;
name: NameStr;
ext: ExtStr;
function PathOnly(path: String): String;
begin
FSplit(path,dir,name,ext);
PathOnly := dir;
end;
function NameOnly(path: String): String;
begin
If (Pos('\',path) <> 0) then
begin
FSplit(path,dir,name,ext);
NameOnly := name+ext;
end
else NameOnly := path;
end;
function BaseNameOnly(path: String): String;
begin
FSplit(path,dir,name,ext);
BaseNameOnly := name;
end;
function ExtOnly(path: String): String;
begin
FSplit(path,dir,name,ext);
Delete(ext,1,1);
ExtOnly := Lower(ext);
end;
end.
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