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uAnsiStringUtils.pas
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uAnsiStringUtils.pas
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unit uAnsiStringUtils;
interface
uses SysUtils, SysConst
{$IFDEF UNICODE}
, AnsiStrings
{$ENDIF}
;
function AnsiStrToInt(const S: AnsiString): Integer;
function AnsiStrToIntDef(const S: AnsiString; Default: Integer): Integer;
function IntToAnsiStr(Value: Integer): AnsiString; overload;
function IntToAnsiStr(Value: Int64): AnsiString; overload;
function UIntToAnsiStr(Value: Cardinal): AnsiString; overload;
function UIntToAnsiStr(Value: UInt64): AnsiString; overload;
implementation
function ValLong_JOH_IA32_4_b(const s; var code: Integer): Longint; // (c) http://fastcode.sourceforge.net/
asm
test eax, eax
jz @@Null
push ebx
push esi
push eax {Save String Pointer}
mov esi, eax {String Pointer}
xor ebx, ebx {Clear Valid Flag and Sign Flag}
xor eax, eax {Clear Result}
jmp @@TrimEntry
@@Null:
mov [edx], eax
inc [edx] {Code = 1}
ret
@@Trim: {Strip Leading Spaces}
inc esi
@@TrimEntry:
movzx ecx, [esi]
cmp cl, ' '
je @@Trim
cmp cl, '0'
jle @@CheckFirstChar
@@CheckAlpha:
test cl, $87
jz @@CheckX {May be 'x' or 'X'}
@@NumLoop:
sub ecx, '0'
cmp ecx, 9
ja @@NumDone {Not '0'..'9'}
cmp eax, MaxInt/10
ja @@NumDone
lea eax, [eax*4+eax]
lea eax, [eax*2+ecx] {Result = Result * 10 + Digit}
inc esi
mov bl, 1 {Valid := True}
movzx ecx, [esi]
jmp @@NumLoop
@@NumDone:
cmp eax, $80000000
jb @@SetSign {No Overflow}
jne @@Overflow
test ebx, ebx {Sign Flag}
js @@Setsign {Result is Valid (-MaxInt-1)}
@@Overflow:
dec esi
mov bl, 0 {Valid := False}
jmp @@SetSign
@@CheckFirstChar:
cmp cl, '-'
je @@PlusMinus
cmp cl, '+'
jne @@SignSet
@@PlusMinus: {Starts with '+' or '-'}
mov bl, '+'+1
sub ebx, ecx {Set Sign Flag: '+' -> +1, '-' -> -1}
inc esi
mov bl, 0 {Valid := False}
movzx ecx, [esi] {Character after '+' or '-'}
@@SignSet:
cmp cl, '$'
je @@Hex {Hexadecimal}
cmp cl, '0'
jne @@CheckAlpha {May start with 'x' or 'X'}
inc esi
mov bl, 1 {Assume Valid = True}
movzx ecx, [esi] {Character after '0'}
jmp @@CheckAlpha {May start with '0x' or '0X'}
@@CheckX:
mov bh, cl
or bh, $20 {'X' -> 'x'}
cmp bh, 'x'
jne @@NumLoop
@@Hex:
mov bl, 0 {Valid := False}
@@HexLoop:
inc esi
movzx ecx, [esi]
sub cl, '0'
cmp cl, 9
jna @@CheckRange {'0'..'9'}
mov bh, cl {Check for Valid Hex Character}
sub bh, 'a'-'0' {'a' -> 0}
cmp bh, 'z'-'a'+1 {Carry if 'a'..'z'}
sbb bh, bh {=$FF if 'a'..'z' else $00}
and bh, $20 {=$20 if 'a'..'z' else $00}
sub cl, bh {'a'..'z' -> 'A'..'Z'}
sub cl, 'A'-'0'-10 {'A'..'Z' -> 10..15}
cmp cl, 15
ja @@NotHex {Not Hex Character}
@@CheckRange:
cmp eax, MaxInt/8 {High(ULONG) div 16}
ja @@SetSign
shl eax, 4 {Result = Result * 16}
mov bl, 1 {Valid := True}
add eax, ecx
jmp @@HexLoop
@@NotHex:
add cl, 'A'-'0'-10 {Restore Char-'0'}
@@SetSign:
mov ch, bl {Save Valid Flag}
sar ebx, 31 {Set Each Bit to Top Bit}
xor eax, ebx {Negate Result if Necessary}
sub eax, ebx
dec ch {0 if Valid, -1 if Invalid}
or cl, ch {If Invalid, Force CL = -1}
cmp cl, -'0' {Last Character = #0?}
jne @@Error {Not Valid or Not End of String}
xor esi, esi {Code := 0}
pop ecx {Dump String Pointer}
@@Finished:
mov [edx], esi {Set Error Code}
pop esi
pop ebx
ret
@@Error:
inc esi
pop ecx {String Pointer}
sub esi, ecx
jmp @@Finished {Exit Setting Error Code}
end;
procedure ConvertErrorFmt(ResString: PResStringRec; const Args: array of const); local;
begin
raise EConvertError.CreateResFmt(ResString, Args);
end;
function AnsiStrToInt(const S: AnsiString): Integer;
var
E: Integer;
begin
Result := ValLong_JOH_IA32_4_b(S, E);
if E <> 0 then
ConvertErrorFmt(@SysConst.SInvalidInteger, [S]);
end;
function AnsiStrToIntDef(const S: AnsiString; Default: Integer): Integer;
var
E: Integer;
begin
Result := ValLong_JOH_IA32_4_b(S, E);
if E <> 0 then
Result := Default;
end;
const
TwoDigitLookup : packed array[0..99] of array[1..2] of AnsiChar =
('00','01','02','03','04','05','06','07','08','09',
'10','11','12','13','14','15','16','17','18','19',
'20','21','22','23','24','25','26','27','28','29',
'30','31','32','33','34','35','36','37','38','39',
'40','41','42','43','44','45','46','47','48','49',
'50','51','52','53','54','55','56','57','58','59',
'60','61','62','63','64','65','66','67','68','69',
'70','71','72','73','74','75','76','77','78','79',
'80','81','82','83','84','85','86','87','88','89',
'90','91','92','93','94','95','96','97','98','99');
function IntToAnsiStr(Value: Integer): AnsiString; // (c) http://fastcode.sourceforge.net/ IntToStr32_JOH_IA32_6_a
asm
push ebx
push edi
push esi
mov ebx, eax {Value}
sar ebx, 31 {0 for +ve Value or -1 for -ve Value}
xor eax, ebx
sub eax, ebx {ABS(Value)}
mov esi, 10 {Max Digits in Result}
mov edi, edx {@Result}
cmp eax, 10
sbb esi, 0
cmp eax, 100
sbb esi, 0
cmp eax, 1000
sbb esi, 0
cmp eax, 10000
sbb esi, 0
cmp eax, 100000
sbb esi, 0
cmp eax, 1000000
sbb esi, 0
cmp eax, 10000000
sbb esi, 0
cmp eax, 100000000
sbb esi, 0
cmp eax, 1000000000
sbb esi, ebx {Digits (Including Sign Character)}
mov ecx, [edx] {Result}
test ecx, ecx
je @@NewStr {Create New String for Result}
cmp dword ptr [ecx-8], 1
jne @@ChangeStr {Reference Count <> 1}
cmp esi, [ecx-4]
je @@LengthOk {Existing Length = Required Length}
sub ecx, 8 {Allocation Address}
push eax {ABS(Value)}
push ecx
mov eax, esp
lea edx, [esi+9] {New Allocation Size}
call system.@ReallocMem {Reallocate Result String}
pop ecx
pop eax {ABS(Value)}
add ecx, 8 {Result}
mov [ecx-4], esi {Set New Length}
mov byte ptr [ecx+esi], 0 {Add Null Terminator}
mov [edi], ecx {Set Result Address}
jmp @@LengthOk
@@ChangeStr:
mov edx, dword ptr [ecx-8] {Reference Count}
add edx, 1
jz @@NewStr {RefCount = -1 (String Constant)}
lock dec dword ptr [ecx-8] {Decrement Existing Reference Count}
@@NewStr:
push eax {ABS(Value)}
mov eax, esi {Length}
call system.@NewAnsiString
mov [edi], eax {Set Result Address}
mov ecx, eax {Result}
pop eax {ABS(Value)}
@@LengthOk:
mov byte ptr [ecx], '-' {Store '-' Character (May be Overwritten)}
add esi, ebx {Digits (Excluding Sign Character)}
sub ecx, ebx {Destination of 1st Digit}
sub esi, 2 {Digits (Excluding Sign Character) - 2}
jle @@FinalDigits {1 or 2 Digit Value}
cmp esi, 8 {10 Digit Value?}
jne @@SetResult {Not a 10 Digit Value}
sub eax, 2000000000 {Digit 10 must be either '1' or '2'}
mov dl, '2'
jnc @@SetDigit10 {Digit 10 = '2'}
mov dl, '1' {Digit 10 = '1'}
add eax, 1000000000
@@SetDigit10:
mov [ecx], dl {Save Digit 10}
mov esi, 7 {9 Digits Remaining}
add ecx, 1 {Destination of 2nd Digit}
@@SetResult:
mov edi, $28F5C29 {((2^32)+100-1)/100}
@@Loop:
mov ebx, eax {Dividend}
mul edi {EDX = Dividend DIV 100}
mov eax, edx {Set Next Dividend}
imul edx, -200 {-2 * (100 * Dividend DIV 100)}
movzx edx, word ptr [TwoDigitLookup+ebx*2+edx] {Dividend MOD 100 in ASCII}
mov [ecx+esi], dx
sub esi, 2
jg @@Loop {Loop Until 1 or 2 Digits Remaining}
@@FinalDigits:
pop esi
pop edi
pop ebx
jnz @@LastDigit
movzx eax, word ptr [TwoDigitLookup+eax*2]
mov [ecx], ax {Save Final 2 Digits}
ret
@@LastDigit:
or al , '0' {Ascii Adjustment}
mov [ecx], al {Save Final Digit}
end;
function IntToAnsiStr(Value: Int64): AnsiString; // (c) http://fastcode.sourceforge.net/ IntToStr64_JOH_IA32_6_a
asm
push ebx
mov ecx, [ebp+8] {Low Integer of Value}
mov edx, [ebp+12] {High Integer of Value}
xor ebp, ebp {Clear Sign Flag (EBP Already Pushed)}
mov ebx, ecx {Low Integer of Value}
test edx, edx
jnl @@AbsValue
mov ebp, 1 {EBP = 1 for -ve Value or 0 for +ve Value}
neg ecx
adc edx, 0
neg edx
@@AbsValue: {EDX:ECX = Abs(Value)}
jnz @@Large
test ecx, ecx
js @@Large
mov edx, eax {@Result}
mov eax, ebx {Low Integer of Value}
call uAnsiStringUtils.IntToStr {Call Fastest Integer IntToStr Function}
pop ebx
@@Exit:
pop ebp {Restore Stack and Exit}
ret 8
@@Large:
push edi
push esi
mov edi, eax
xor ebx, ebx
xor eax, eax
@@Test15: {Test for 15 or More Digits}
cmp edx, $00005af3 {100000000000000 div $100000000}
jne @@Check15
cmp ecx, $107a4000 {100000000000000 mod $100000000}
@@Check15:
jb @@Test13
@@Test17: {Test for 17 or More Digits}
cmp edx, $002386f2 {10000000000000000 div $100000000}
jne @@Check17
cmp ecx, $6fc10000 {10000000000000000 mod $100000000}
@@Check17:
jb @@Test15or16
@@Test19: {Test for 19 Digits}
cmp edx, $0de0b6b3 {1000000000000000000 div $100000000}
jne @@Check19
cmp ecx, $a7640000 {1000000000000000000 mod $100000000}
@@Check19:
jb @@Test17or18
mov al, 19
jmp @@SetLength
@@Test17or18: {17 or 18 Digits}
mov bl, 18
cmp edx, $01634578 {100000000000000000 div $100000000}
jne @@SetLen
cmp ecx, $5d8a0000 {100000000000000000 mod $100000000}
jmp @@SetLen
@@Test15or16: {15 or 16 Digits}
mov bl, 16
cmp edx, $00038d7e {1000000000000000 div $100000000}
jne @@SetLen
cmp ecx, $a4c68000 {1000000000000000 mod $100000000}
jmp @@SetLen
@@Test13: {Test for 13 or More Digits}
cmp edx, $000000e8 {1000000000000 div $100000000}
jne @@Check13
cmp ecx, $d4a51000 {1000000000000 mod $100000000}
@@Check13:
jb @@Test11
@@Test13or14: {13 or 14 Digits}
mov bl, 14
cmp edx, $00000918 {10000000000000 div $100000000}
jne @@SetLen
cmp ecx, $4e72a000 {10000000000000 mod $100000000}
jmp @@SetLen
@@Test11: {10, 11 or 12 Digits}
cmp edx, $02 {10000000000 div $100000000}
jne @@Check11
cmp ecx, $540be400 {10000000000 mod $100000000}
@@Check11:
mov bl, 11
jb @@SetLen {10 Digits}
@@Test11or12: {11 or 12 Digits}
mov bl, 12
cmp edx, $17 {100000000000 div $100000000}
jne @@SetLen
cmp ecx, $4876e800 {100000000000 mod $100000000}
@@SetLen:
sbb eax, 0 {Adjust for Odd/Evem Digit Count}
add eax, ebx
@@SetLength: {Abs(Value) in EDX:ECX, Digits in EAX}
push ecx {Save Abs(Value)}
push edx
lea edx, [eax+ebp] {Digits Needed (Including Sign Character)}
mov ecx, [edi] {@Result}
mov esi, edx {Digits Needed (Including Sign Character)}
test ecx, ecx
je @@NewStr {Create New String for Result}
cmp dword ptr [ecx-8], 1
jne @@ChangeStr {Reference Count <> 1}
cmp esi, [ecx-4]
je @@LengthOk {Existing Length = Required Length}
sub ecx, 8 {Allocation Address}
push eax {ABS(Value)}
push ecx
mov eax, esp
lea edx, [esi+9] {New Allocation Size}
call system.@ReallocMem {Reallocate Result String}
pop ecx
pop eax {ABS(Value)}
add ecx, 8 {@Result}
mov [ecx-4], esi {Set New Length}
mov byte ptr [ecx+esi], 0 {Add Null Terminator}
mov [edi], ecx {Set Result Address}
jmp @@LengthOk
@@ChangeStr:
mov edx, dword ptr [ecx-8] {Reference Count}
add edx, 1
jz @@NewStr {RefCount = -1 (String Constant)}
lock dec dword ptr [ecx-8] {Decrement Existing Reference Count}
@@NewStr:
push eax {ABS(Value)}
mov eax, esi {Length}
call system.@NewAnsiString
mov [edi], eax {Set Result Address}
mov ecx, eax {@Result}
pop eax {ABS(Value)}
@@LengthOk:
mov edi, [edi] {@Result}
sub esi, ebp {Digits Needed (Excluding Sign Character)}
mov byte ptr [edi], '-' {Store '-' Character (May be Overwritten)}
add edi, ebp {Destination of 1st Digit}
pop edx {Restore Abs(Value)}
pop eax
cmp esi, 17
jl @@LessThan17Digits {Digits < 17}
je @@SetDigit17 {Digits = 17}
cmp esi, 18
je @@SetDigit18 {Digits = 18}
mov cl, '0' - 1
mov ebx, $a7640000 {1000000000000000000 mod $100000000}
mov ebp, $0de0b6b3 {1000000000000000000 div $100000000}
@@CalcDigit19:
add ecx, 1
sub eax, ebx
sbb edx, ebp
jnc @@CalcDigit19
add eax, ebx
adc edx, ebp
mov [edi], cl
add edi, 1
@@SetDigit18:
mov cl, '0' - 1
mov ebx, $5d8a0000 {100000000000000000 mod $100000000}
mov ebp, $01634578 {100000000000000000 div $100000000}
@@CalcDigit18:
add ecx, 1
sub eax, ebx
sbb edx, ebp
jnc @@CalcDigit18
add eax, ebx
adc edx, ebp
mov [edi], cl
add edi, 1
@@SetDigit17:
mov cl, '0' - 1
mov ebx, $6fc10000 {10000000000000000 mod $100000000}
mov ebp, $002386f2 {10000000000000000 div $100000000}
@@CalcDigit17:
add ecx, 1
sub eax, ebx
sbb edx, ebp
jnc @@CalcDigit17
add eax, ebx
adc edx, ebp
mov [edi], cl
add edi, 1 {Update Destination}
mov esi, 16 {Set 16 Digits Left}
@@LessThan17Digits: {Process Next 8 Digits}
mov ecx, 100000000 {EDX:EAX = Abs(Value) = Dividend}
div ecx
mov ebp, eax {Dividend DIV 100000000}
mov ebx, edx
mov eax, edx {Dividend MOD 100000000}
mov edx, $51EB851F
mul edx
shr edx, 5 {Dividend DIV 100}
mov eax, edx {Set Next Dividend}
lea edx, [edx*4+edx]
lea edx, [edx*4+edx]
shl edx, 2 {Dividend DIV 100 * 100}
sub ebx, edx {Remainder (0..99)}
movzx ebx, word ptr [TwoDigitLookup+ebx*2]
shl ebx, 16
mov edx, $51EB851F
mov ecx, eax {Dividend}
mul edx
shr edx, 5 {Dividend DIV 100}
mov eax, edx
lea edx, [edx*4+edx]
lea edx, [edx*4+edx]
shl edx, 2 {Dividend DIV 100 * 100}
sub ecx, edx {Remainder (0..99)}
or bx, word ptr [TwoDigitLookup+ecx*2]
mov [edi+esi-4], ebx {Store 4 Digits}
mov ebx, eax
mov edx, $51EB851F
mul edx
shr edx, 5 {EDX := Dividend DIV 100}
lea eax, [edx*4+edx]
lea eax, [eax*4+eax]
shl eax, 2 {EDX = Dividend DIV 100 * 100}
sub ebx, eax {Remainder (0..99)}
movzx ebx, word ptr [TwoDigitLookup+ebx*2]
movzx ecx, word ptr [TwoDigitLookup+edx*2]
shl ebx, 16
or ebx, ecx
mov [edi+esi-8], ebx {Store 4 Digits}
mov eax, ebp {Remainder}
sub esi, 10 {Digits Left - 2}
jz @@Last2Digits
@@SmallLoop: {Process Remaining Digits}
mov edx, $28F5C29 {((2^32)+100-1)/100}
mov ebx, eax {Dividend}
mul edx
mov eax, edx {Set Next Dividend}
imul edx, -200
movzx edx, word ptr [TwoDigitLookup+ebx*2+edx] {Dividend MOD 100 in ASCII}
mov [edi+esi], dx
sub esi, 2
jg @@SmallLoop {Repeat Until Less than 2 Digits Remaining}
jz @@Last2Digits
or al , '0' {Ascii Adjustment}
mov [edi], al {Save Final Digit}
jmp @@Done
@@Last2Digits:
movzx eax, word ptr [TwoDigitLookup+eax*2]
mov [edi], ax {Save Final 2 Digits}
@@Done:
pop esi
pop edi
pop ebx
end;
function UIntToAnsiStr(Value: Cardinal): AnsiString;
begin
{$IFDEF UNICODE}AnsiStrings.{$ENDIF}FmtStr(Result, '%u', [Value]);
end;
function UIntToAnsiStr(Value: UInt64): AnsiString;
begin
{$IFDEF UNICODE}AnsiStrings.{$ENDIF}FmtStr(Result, '%u', [Value]);
end;
end.