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https://gitlab.com/freepascal.org/fpc/source.git
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720 lines
17 KiB
PHP
720 lines
17 KiB
PHP
{
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$Id$
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This file is part of the Free Pascal run time library.
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Copyright (c) 1999-2000 by the Free Pascal development team
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**********************************************************************}
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{****************************************************************************
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subroutines for string handling
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****************************************************************************}
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{$ifndef INTERNSETLENGTH}
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procedure SetLength(var s:shortstring;len:StrLenInt);
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{$else INTERNSETLENGTH}
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procedure fpc_Shortstr_SetLength(var s:shortstring;len:StrLenInt);[Public,Alias : 'FPC_SHORTSTR_SETLENGTH']; {$ifdef hascompilerproc} compilerproc; {$endif}
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{$endif INTERNSETLENGTH}
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begin
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if Len>255 then
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Len:=255;
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s[0]:=chr(len);
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end;
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{$ifdef interncopy}
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function fpc_shortstr_copy(const s : shortstring;index : StrLenInt;count : StrLenInt): shortstring;compilerproc;
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{$else}
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function copy(const s : shortstring;index : StrLenInt;count : StrLenInt): shortstring;
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{$endif}
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begin
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if count<0 then
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count:=0;
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if index>1 then
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dec(index)
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else
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index:=0;
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if index>length(s) then
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count:=0
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else
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if count>length(s)-index then
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count:=length(s)-index;
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{$ifdef interncopy}
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fpc_shortstr_Copy[0]:=chr(Count);
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Move(s[Index+1],fpc_shortstr_Copy[1],Count);
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{$else}
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Copy[0]:=chr(Count);
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Move(s[Index+1],Copy[1],Count);
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{$endif}
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end;
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procedure delete(var s : shortstring;index : StrLenInt;count : StrLenInt);
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begin
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if index<=0 then
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exit;
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if (Index<=Length(s)) and (Count>0) then
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begin
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if Count>length(s)-Index then
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Count:=length(s)-Index+1;
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s[0]:=Chr(length(s)-Count);
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if Index<=Length(s) then
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Move(s[Index+Count],s[Index],Length(s)-Index+1);
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end;
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end;
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procedure insert(const source : shortstring;var s : shortstring;index : StrLenInt);
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var
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cut,srclen,indexlen : longint;
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begin
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if index<1 then
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index:=1;
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if index>length(s) then
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index:=length(s)+1;
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indexlen:=Length(s)-Index+1;
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srclen:=length(Source);
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if length(source)+length(s)>=sizeof(s) then
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begin
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cut:=length(source)+length(s)-sizeof(s)+1;
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if cut>indexlen then
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begin
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dec(srclen,cut-indexlen);
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indexlen:=0;
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end
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else
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dec(indexlen,cut);
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end;
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move(s[Index],s[Index+srclen],indexlen);
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move(Source[1],s[Index],srclen);
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s[0]:=chr(index+srclen+indexlen-1);
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end;
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procedure insert(source : Char;var s : shortstring;index : StrLenInt);
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var
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indexlen : longint;
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begin
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if index<1 then
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index:=1;
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if index>length(s) then
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index:=length(s)+1;
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indexlen:=Length(s)-Index+1;
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if (length(s)+1=sizeof(s)) and (indexlen>0) then
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dec(indexlen);
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move(s[Index],s[Index+1],indexlen);
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s[Index]:=Source;
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s[0]:=chr(index+indexlen);
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end;
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function pos(const substr : shortstring;const s : shortstring):StrLenInt;
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var
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i,MaxLen : StrLenInt;
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pc : pchar;
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begin
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Pos:=0;
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if Length(SubStr)>0 then
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begin
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MaxLen:=Length(s)-Length(SubStr);
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i:=0;
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pc:=@s[1];
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while (i<=MaxLen) do
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begin
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inc(i);
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if (SubStr[1]=pc^) and
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(CompareChar(Substr[1],pc^,Length(SubStr))=0) then
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begin
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Pos:=i;
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exit;
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end;
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inc(pc);
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end;
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end;
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end;
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{Faster when looking for a single char...}
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function pos(c:char;const s:shortstring):StrLenInt;
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var
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i : StrLenInt;
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pc : pchar;
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begin
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pc:=@s[1];
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for i:=1 to length(s) do
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begin
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if pc^=c then
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begin
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pos:=i;
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exit;
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end;
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inc(pc);
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end;
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pos:=0;
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end;
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{$ifdef interncopy}
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function fpc_char_copy(c:char;index : StrLenInt;count : StrLenInt): shortstring;compilerproc;
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begin
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if (index=1) and (Count>0) then
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fpc_char_Copy:=c
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else
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fpc_char_Copy:='';
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end;
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{$else}
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function copy(c:char;index : StrLenInt;count : StrLenInt): shortstring;
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begin
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if (index=1) and (Count>0) then
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Copy:=c
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else
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Copy:='';
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end;
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{$endif}
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function pos(const substr : shortstring;c:char): StrLenInt;
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begin
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if (length(substr)=1) and (substr[1]=c) then
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Pos:=1
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else
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Pos:=0;
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end;
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{$ifdef IBM_CHAR_SET}
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const
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UpCaseTbl : shortstring[7]=#154#142#153#144#128#143#165;
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LoCaseTbl : shortstring[7]=#129#132#148#130#135#134#164;
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{$endif}
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function upcase(c : char) : char;
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{$IFDEF IBM_CHAR_SET}
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var
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i : longint;
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{$ENDIF}
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begin
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if (c in ['a'..'z']) then
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upcase:=char(byte(c)-32)
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else
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{$IFDEF IBM_CHAR_SET}
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begin
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i:=Pos(c,LoCaseTbl);
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if i>0 then
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upcase:=UpCaseTbl[i]
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else
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upcase:=c;
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end;
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{$ELSE}
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upcase:=c;
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{$ENDIF}
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end;
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function upcase(const s : shortstring) : shortstring;
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var
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i : longint;
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begin
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upcase[0]:=s[0];
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for i := 1 to length (s) do
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upcase[i] := upcase (s[i]);
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end;
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function lowercase(c : char) : char;overload;
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{$IFDEF IBM_CHAR_SET}
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var
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i : longint;
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{$ENDIF}
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begin
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if (c in ['A'..'Z']) then
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lowercase:=char(byte(c)+32)
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else
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{$IFDEF IBM_CHAR_SET}
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begin
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i:=Pos(c,UpCaseTbl);
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if i>0 then
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lowercase:=LoCaseTbl[i]
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else
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lowercase:=c;
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end;
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{$ELSE}
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lowercase:=c;
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{$ENDIF}
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end;
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function lowercase(const s : shortstring) : shortstring; overload;
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var
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i : longint;
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begin
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lowercase [0]:=s[0];
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for i:=1 to length(s) do
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lowercase[i]:=lowercase (s[i]);
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end;
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const
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HexTbl : array[0..15] of char='0123456789ABCDEF';
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function hexstr(val : longint;cnt : byte) : shortstring;
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var
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i : longint;
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begin
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hexstr[0]:=char(cnt);
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for i:=cnt downto 1 do
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begin
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hexstr[i]:=hextbl[val and $f];
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val:=val shr 4;
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end;
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end;
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function octstr(val : longint;cnt : byte) : shortstring;
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var
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i : longint;
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begin
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octstr[0]:=char(cnt);
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for i:=cnt downto 1 do
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begin
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octstr[i]:=hextbl[val and 7];
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val:=val shr 3;
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end;
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end;
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function binstr(val : longint;cnt : byte) : shortstring;
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var
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i : longint;
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begin
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binstr[0]:=char(cnt);
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for i:=cnt downto 1 do
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begin
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binstr[i]:=char(48+val and 1);
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val:=val shr 1;
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end;
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end;
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function hexstr(val : int64;cnt : byte) : shortstring;
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var
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i : longint;
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begin
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hexstr[0]:=char(cnt);
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for i:=cnt downto 1 do
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begin
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hexstr[i]:=hextbl[val and $f];
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val:=val shr 4;
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end;
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end;
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function octstr(val : int64;cnt : byte) : shortstring;
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var
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i : longint;
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begin
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octstr[0]:=char(cnt);
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for i:=cnt downto 1 do
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begin
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octstr[i]:=hextbl[val and 7];
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val:=val shr 3;
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end;
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end;
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function binstr(val : int64;cnt : byte) : shortstring;
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var
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i : longint;
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begin
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binstr[0]:=char(cnt);
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for i:=cnt downto 1 do
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begin
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binstr[i]:=char(48+val and 1);
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val:=val shr 1;
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end;
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end;
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function space (b : byte): shortstring;
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begin
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space[0] := chr(b);
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FillChar (Space[1],b,' ');
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end;
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{*****************************************************************************
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Str() Helpers
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*****************************************************************************}
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procedure fpc_shortstr_longint(v : longint;len : longint;var s : shortstring);[public,alias:'FPC_SHORTSTR_LONGINT']; {$ifdef hascompilerproc} compilerproc; {$endif}
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begin
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int_str(v,s);
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if length(s)<len then
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s:=space(len-length(s))+s;
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end;
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{$ifdef ver1_0}
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procedure fpc_shortstr_cardinal(v : longword;len : longint;var s : shortstring);[public,alias:'FPC_SHORTSTR_CARDINAL']; {$ifdef hascompilerproc} compilerproc; {$endif}
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{$else}
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procedure fpc_shortstr_longword(v : longword;len : longint;var s : shortstring);[public,alias:'FPC_SHORTSTR_LONGWORD']; {$ifdef hascompilerproc} compilerproc; {$endif}
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{$endif}
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begin
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int_str(v,s);
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if length(s)<len then
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s:=space(len-length(s))+s;
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end;
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{ fpc_shortstr_longint must appear before this file is included, because }
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{ it's used inside real2str.inc and otherwise the searching via the }
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{ compilerproc name will fail (JM) }
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{$I real2str.inc}
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procedure fpc_ShortStr_Float(d : ValReal;len,fr,rt : longint;var s : shortstring);[public,alias:'FPC_SHORTSTR_FLOAT']; {$ifdef hascompilerproc}compilerproc;{$endif hascompilerproc}
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begin
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str_real(len,fr,d,treal_type(rt),s);
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end;
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{
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Array Of Char Str() helpers
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}
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procedure fpc_chararray_longint(v : longint;len : longint;var a:array of char);{$ifdef hascompilerproc} compilerproc; {$endif}
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var
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ss : shortstring;
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maxlen : longint;
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begin
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int_str(v,ss);
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if length(ss)<len then
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ss:=space(len-length(ss))+ss;
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if length(ss)<high(a)+1 then
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maxlen:=length(ss)
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else
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maxlen:=high(a)+1;
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move(ss[1],pchar(@a)^,maxlen);
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end;
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procedure fpc_chararray_longword(v : longword;len : longint;var a : array of char);{$ifdef hascompilerproc} compilerproc; {$endif}
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var
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ss : shortstring;
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maxlen : longint;
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begin
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int_str(v,ss);
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if length(ss)<len then
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ss:=space(len-length(ss))+ss;
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if length(ss)<high(a)+1 then
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maxlen:=length(ss)
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else
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maxlen:=high(a)+1;
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move(ss[1],pchar(@a)^,maxlen);
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end;
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procedure fpc_chararray_Float(d : ValReal;len,fr,rt : longint;var a : array of char);{$ifdef hascompilerproc}compilerproc;{$endif hascompilerproc}
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var
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ss : shortstring;
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maxlen : longint;
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begin
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str_real(len,fr,d,treal_type(rt),ss);
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if length(ss)<high(a)+1 then
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maxlen:=length(ss)
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else
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maxlen:=high(a)+1;
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move(ss[1],pchar(@a)^,maxlen);
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end;
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{*****************************************************************************
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Val() Functions
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*****************************************************************************}
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Function InitVal(const s:shortstring;var negativ:boolean;var base:byte):ValSInt;
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var
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Code : Longint;
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begin
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{Skip Spaces and Tab}
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code:=1;
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while (code<=length(s)) and (s[code] in [' ',#9]) do
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inc(code);
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{Sign}
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negativ:=false;
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case s[code] of
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'-' : begin
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negativ:=true;
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inc(code);
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end;
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'+' : inc(code);
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end;
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{Base}
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base:=10;
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if code<=length(s) then
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begin
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case s[code] of
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'$' : begin
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base:=16;
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repeat
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inc(code);
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until (code>=length(s)) or (s[code]<>'0');
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end;
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'%' : begin
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base:=2;
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inc(code);
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end;
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'&' : begin
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Base:=8;
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repeat
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inc(code);
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until (code>=length(s)) or (s[code]<>'0');
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end;
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end;
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end;
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InitVal:=code;
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end;
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Function fpc_Val_SInt_ShortStr(DestSize: longint; Const S: ShortString; var Code: ValSInt): ValSInt; [public, alias:'FPC_VAL_SINT_SHORTSTR']; {$ifdef hascompilerproc} compilerproc; {$endif}
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var
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u, temp, prev, maxPrevValue, maxNewValue: ValUInt;
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base : byte;
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negative : boolean;
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begin
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fpc_Val_SInt_ShortStr := 0;
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Temp:=0;
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Code:=InitVal(s,negative,base);
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if Code>length(s) then
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exit;
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maxPrevValue := ValUInt(MaxUIntValue) div ValUInt(Base);
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if (base = 10) then
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maxNewValue := MaxSIntValue + ord(negative)
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else
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maxNewValue := MaxUIntValue;
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while Code<=Length(s) do
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begin
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case s[Code] of
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'0'..'9' : u:=Ord(S[Code])-Ord('0');
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'A'..'F' : u:=Ord(S[Code])-(Ord('A')-10);
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'a'..'f' : u:=Ord(S[Code])-(Ord('a')-10);
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else
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u:=16;
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end;
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Prev := Temp;
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Temp := Temp*ValUInt(base);
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If (u >= base) or
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(ValUInt(maxNewValue-u) < Temp) or
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(prev > maxPrevValue) Then
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Begin
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fpc_Val_SInt_ShortStr := 0;
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Exit
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End;
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Temp:=Temp+u;
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inc(code);
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end;
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code := 0;
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fpc_Val_SInt_ShortStr := ValSInt(Temp);
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If Negative Then
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fpc_Val_SInt_ShortStr := -fpc_Val_SInt_ShortStr;
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If Not(Negative) and (base <> 10) Then
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{sign extend the result to allow proper range checking}
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Case DestSize of
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1: fpc_Val_SInt_ShortStr := shortint(fpc_Val_SInt_ShortStr);
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2: fpc_Val_SInt_ShortStr := smallint(fpc_Val_SInt_ShortStr);
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{ Uncomment the folling once full 64bit support is in place
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4: fpc_Val_SInt_ShortStr := longint(fpc_Val_SInt_ShortStr);}
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End;
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end;
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{$ifdef hascompilerproc}
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{ we need this for fpc_Val_SInt_Ansistr and fpc_Val_SInt_WideStr because }
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{ we have to pass the DestSize parameter on (JM) }
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Function fpc_Val_SInt_ShortStr(DestSize: longint; Const S: ShortString; var Code: ValSInt): ValSInt; [external name 'FPC_VAL_SINT_SHORTSTR'];
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{$endif hascompilerproc}
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Function fpc_Val_UInt_Shortstr(Const S: ShortString; var Code: ValSInt): ValUInt; [public, alias:'FPC_VAL_UINT_SHORTSTR']; {$ifdef hascompilerproc} compilerproc; {$endif}
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var
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u, prev : ValUInt;
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base : byte;
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negative : boolean;
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begin
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fpc_Val_UInt_Shortstr:=0;
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Code:=InitVal(s,negative,base);
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If Negative or (Code>length(s)) Then
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Exit;
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while Code<=Length(s) do
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begin
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case s[Code] of
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'0'..'9' : u:=Ord(S[Code])-Ord('0');
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'A'..'F' : u:=Ord(S[Code])-(Ord('A')-10);
|
|
'a'..'f' : u:=Ord(S[Code])-(Ord('a')-10);
|
|
else
|
|
u:=16;
|
|
end;
|
|
prev := fpc_Val_UInt_Shortstr;
|
|
If (u>=base) or
|
|
(ValUInt(MaxUIntValue-u) div ValUInt(Base)<prev) then
|
|
begin
|
|
fpc_Val_UInt_Shortstr:=0;
|
|
exit;
|
|
end;
|
|
fpc_Val_UInt_Shortstr:=fpc_Val_UInt_Shortstr*ValUInt(base) + u;
|
|
inc(code);
|
|
end;
|
|
code := 0;
|
|
end;
|
|
|
|
|
|
Function fpc_Val_Real_ShortStr(const s : shortstring; var code : ValSInt): ValReal; [public, alias:'FPC_VAL_REAL_SHORTSTR']; {$ifdef hascompilerproc} compilerproc; {$endif}
|
|
var
|
|
hd,
|
|
esign,sign : valreal;
|
|
exponent,i : longint;
|
|
flags : byte;
|
|
begin
|
|
fpc_Val_Real_ShortStr:=0.0;
|
|
code:=1;
|
|
exponent:=0;
|
|
esign:=1;
|
|
flags:=0;
|
|
sign:=1;
|
|
while (code<=length(s)) and (s[code] in [' ',#9]) do
|
|
inc(code);
|
|
case s[code] of
|
|
'+' : inc(code);
|
|
'-' : begin
|
|
sign:=-1;
|
|
inc(code);
|
|
end;
|
|
end;
|
|
while (Code<=Length(s)) and (s[code] in ['0'..'9']) do
|
|
begin
|
|
{ Read integer part }
|
|
flags:=flags or 1;
|
|
|
|
fpc_Val_Real_ShortStr:=fpc_Val_Real_ShortStr*10+(ord(s[code])-ord('0'));
|
|
inc(code);
|
|
end;
|
|
{ Decimal ? }
|
|
if (s[code]='.') and (length(s)>=code) then
|
|
begin
|
|
hd:=1.0;
|
|
inc(code);
|
|
while (s[code] in ['0'..'9']) and (length(s)>=code) do
|
|
begin
|
|
{ Read fractional part. }
|
|
flags:=flags or 2;
|
|
fpc_Val_Real_ShortStr:=fpc_Val_Real_ShortStr*10+(ord(s[code])-ord('0'));
|
|
hd:=hd*10.0;
|
|
inc(code);
|
|
end;
|
|
fpc_Val_Real_ShortStr:=fpc_Val_Real_ShortStr/hd;
|
|
end;
|
|
{ Again, read integer and fractional part}
|
|
if flags=0 then
|
|
begin
|
|
fpc_Val_Real_ShortStr:=0.0;
|
|
exit;
|
|
end;
|
|
{ Exponent ? }
|
|
if (upcase(s[code])='E') and (length(s)>=code) then
|
|
begin
|
|
inc(code);
|
|
if s[code]='+' then
|
|
inc(code)
|
|
else
|
|
if s[code]='-' then
|
|
begin
|
|
esign:=-1;
|
|
inc(code);
|
|
end;
|
|
if not(s[code] in ['0'..'9']) or (length(s)<code) then
|
|
begin
|
|
fpc_Val_Real_ShortStr:=0.0;
|
|
exit;
|
|
end;
|
|
while (s[code] in ['0'..'9']) and (length(s)>=code) do
|
|
begin
|
|
exponent:=exponent*10;
|
|
exponent:=exponent+ord(s[code])-ord('0');
|
|
inc(code);
|
|
end;
|
|
end;
|
|
{ Calculate Exponent }
|
|
{
|
|
if esign>0 then
|
|
for i:=1 to exponent do
|
|
fpc_Val_Real_ShortStr:=Val_Real_ShortStr*10
|
|
else
|
|
for i:=1 to exponent do
|
|
fpc_Val_Real_ShortStr:=Val_Real_ShortStr/10; }
|
|
hd:=1.0;
|
|
for i:=1 to exponent do
|
|
hd:=hd*10.0;
|
|
if esign>0 then
|
|
fpc_Val_Real_ShortStr:=fpc_Val_Real_ShortStr*hd
|
|
else
|
|
fpc_Val_Real_ShortStr:=fpc_Val_Real_ShortStr/hd;
|
|
{ Not all characters are read ? }
|
|
if length(s)>=code then
|
|
begin
|
|
fpc_Val_Real_ShortStr:=0.0;
|
|
exit;
|
|
end;
|
|
{ evaluate sign }
|
|
fpc_Val_Real_ShortStr:=fpc_Val_Real_ShortStr*sign;
|
|
{ success ! }
|
|
code:=0;
|
|
end;
|
|
|
|
|
|
Procedure SetString (Var S : Shortstring; Buf : PChar; Len : Longint);
|
|
begin
|
|
If Len > High(S) then
|
|
Len := High(S);
|
|
SetLength(S,Len);
|
|
If Buf<>Nil then
|
|
begin
|
|
Move (Buf[0],S[1],Len);
|
|
end;
|
|
end;
|
|
|
|
{
|
|
$Log$
|
|
Revision 1.27 2003-02-26 20:04:47 jonas
|
|
* fixed shortstring version of setstring
|
|
|
|
Revision 1.26 2002/10/21 19:52:47 jonas
|
|
* fixed some buffer overflow errors in SetString (both short and
|
|
ansistring versions) (merged)
|
|
|
|
Revision 1.25 2002/10/19 17:06:50 michael
|
|
+ Added check for nil buffer to setstring
|
|
|
|
Revision 1.24 2002/10/02 18:21:51 peter
|
|
* Copy() changed to internal function calling compilerprocs
|
|
* FPC_SHORTSTR_COPY renamed to FPC_SHORTSTR_ASSIGN because of the
|
|
new copy functions
|
|
|
|
Revision 1.23 2002/09/14 11:20:50 carl
|
|
* Delphi compatibility fix (with string routines)
|
|
|
|
Revision 1.22 2002/09/07 21:19:00 carl
|
|
* cardinal -> longword
|
|
|
|
Revision 1.21 2002/09/07 15:07:46 peter
|
|
* old logs removed and tabs fixed
|
|
|
|
Revision 1.20 2002/09/02 19:24:41 peter
|
|
* array of char support for Str()
|
|
|
|
Revision 1.19 2002/08/06 20:53:38 michael
|
|
+ Added support for octal strings (using &)
|
|
|
|
Revision 1.18 2002/01/24 18:27:06 peter
|
|
* lowercase() overloaded
|
|
|
|
}
|