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Aminet 28 (1998)(GTI - Schatztruhe)[!][Dec 1998].iso
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fpc09905c.lha
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sstrings.inc
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1998-09-21
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{
$Id: sstrings.inc,v 1.11 1998/08/11 21:39:07 peter Exp $
This file is part of the Free Pascal run time library.
Copyright (c) 1993,97 by the Free Pascal development team
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program 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.
**********************************************************************}
{****************************************************************************
subroutines for string handling
****************************************************************************}
{$I real2str.inc}
function copy(const s : string;index : StrLenInt;count : StrLenInt): string;
begin
if count<0 then
count:=0;
if index>1 then
dec(index)
else
index:=0;
if index>length(s) then
count:=0
else
if index+count>length(s) then
count:=length(s)-index;
Copy[0]:=chr(Count);
Move(s[Index+1],Copy[1],Count);
end;
procedure delete(var s : string;index : StrLenInt;count : StrLenInt);
begin
if index<=0 then
begin
count:=count+index-1;
index:=1;
end;
if (Index<=Length(s)) and (Count>0) then
begin
if Count+Index>length(s) then
Count:=length(s)-Index+1;
s[0]:=Chr(length(s)-Count);
if Index<=Length(s) then
Move(s[Index+Count],s[Index],Length(s)-Index+1);
end;
end;
procedure insert(const source : string;var s : string;index : StrLenInt);
begin
if index>1 then
dec(index)
else
index:=0;
s:=Copy(s,1,Index)+source+Copy(s,Index+1,length(s));
end;
function pos(const substr : string;const s : string): byte;
var i,j : longint;
e : boolean;
begin
i := 0;
j := 0;
e:=(length(SubStr)>0);
while e and (i<=Length(s)-Length(SubStr)) do
begin
inc(i);
if (SubStr[1]=s[i]) and (Substr=Copy(s,i,Length(SubStr))) then
begin
j:=i;
e:=false;
end;
end;
Pos:=j;
end;
{Faster when looking for a single char...}
function pos(c:char;const s:string):byte;
var i:longint;
begin
for i:=1 to length(s) do
if s[i]=c then
begin
pos:=i;
exit;
end;
pos:=0;
end;
{$ifdef IBM_CHAR_SET}
const
UpCaseTbl : string[7]=#154#142#153#144#128#143#165;
LoCaseTbl : string[7]=#129#132#148#130#135#134#164;
{$endif}
function upcase(c : char) : char;
{$IFDEF IBM_CHAR_SET}
var
i : longint;
{$ENDIF}
begin
if (c in ['a'..'z']) then
upcase:=char(byte(c)-32)
else
{$IFDEF IBM_CHAR_SET}
begin
i:=Pos(c,LoCaseTbl);
if i>0 then
upcase:=UpCaseTbl[i]
else
upcase:=c;
end;
{$ELSE}
upcase:=c;
{$ENDIF}
end;
function upcase(const s : string) : string;
var i : longint;
begin
upcase[0]:=s[0];
for i := 1 to length (s) do
upcase[i] := upcase (s[i]);
end;
{$ifndef RTLLITE}
function lowercase(c : char) : char;
{$IFDEF IBM_CHAR_SET}
var
i : longint;
{$ENDIF}
begin
if (c in ['A'..'Z']) then
lowercase:=char(byte(c)+32)
else
{$IFDEF IBM_CHAR_SET}
begin
i:=Pos(c,UpCaseTbl);
if i>0 then
lowercase:=LoCaseTbl[i]
else
lowercase:=c;
end;
{$ELSE}
lowercase:=c;
{$ENDIF}
end;
function lowercase(const s : string) : string;
var i : longint;
begin
lowercase [0] := s[0];
for i := 1 to length (s) do
lowercase[i] := lowercase (s[i]);
end;
function hexstr(val : longint;cnt : byte) : string;
const
HexTbl : array[0..15] of char='0123456789ABCDEF';
var
i : longint;
begin
hexstr[0]:=char(cnt);
for i:=cnt downto 1 do
begin
hexstr[i]:=hextbl[val and $f];
val:=val shr 4;
end;
end;
function binstr(val : longint;cnt : byte) : string;
var
i : longint;
begin
binstr[0]:=char(cnt);
for i:=cnt downto 1 do
begin
binstr[i]:=char(48+val and 1);
val:=val shr 1;
end;
end;
{$endif RTLLITE}
function space (b : byte): string;
begin
space[0] := chr(b);
FillChar (Space[1],b,' ');
end;
{*****************************************************************************
Str() Helpers
*****************************************************************************}
procedure int_str_real(d : real;len,fr : longint;var s : string);[public, alias : 'STR_REAL'];
begin
{$ifdef i386}
str_real(len,fr,d,rt_s64real,s);
{$else}
str_real(len,fr,d,rt_s32real,s);
{$endif}
end;
{$ifdef SUPPORT_SINGLE}
procedure int_str_single(d : single;len,fr : longint;var s : string);[public, alias : 'STR_SINGLE'];
begin
str_real(len,fr,d,rt_s32real,s);
end;
{$endif SUPPORT_SINGLE}
{$ifdef SUPPORT_EXTENDED}
procedure int_str_extended(d : extended;len,fr : longint;var s : string);[public, alias : 'STR_EXTENDED'];
begin
str_real(len,fr,d,rt_s80real,s);
end;
{$endif SUPPORT_EXTENDED}
{$ifdef SUPPORT_COMP}
procedure int_str_comp(d : comp;len,fr : longint;var s : string);[public, alias : 'STR_COMP'];
begin
str_real(len,fr,d,rt_s64bit,s);
end;
{$endif SUPPORT_COMP}
{$ifdef SUPPORT_FIXED}
procedure int_str_fixed(d : fixed;len,fr : longint;var s : string);[public, alias : 'STR_FIXED'];
begin
str_real(len,fr,d,rt_f32bit,s);
end;
{$endif SUPPORT_FIXED}
procedure int_str_longint(v : longint;len : longint;var s : string);[public, alias : 'STR_LONGINT'];
begin
int_str(v,s);
if length(s)<len then
s:=space(len-length(s))+s;
end;
procedure int_str_cardinal(v : cardinal;len : longint;var s : string);[public, alias : 'STR_CARDINAL'];
begin
int_str(v,s);
if length(s)<len then
s:=space(len-length(s))+s;
end;
{*****************************************************************************
Val() Functions
*****************************************************************************}
Function InitVal(const s:string;var negativ:boolean;var base:byte):Word;
var
Code : Longint;
begin
{Skip Spaces and Tab}
code:=1;
while (code<=length(s)) and (s[code] in [' ',#9]) do
inc(code);
{Sign}
negativ:=false;
case s[code] of
'-' : begin
negativ:=true;
inc(code);
end;
'+' : inc(code);
end;
{Base}
base:=10;
if code<=length(s) then
begin
case s[code] of
'$' : begin
base:=16;
repeat
inc(code);
until (code>=length(s)) or (s[code]<>'0');
if length(s)-code>7 then
code:=code+8;
end;
'%' : begin
base:=2;
inc(code);
end;
end;
end;
InitVal:=code;
end;
procedure val(const s : string;var l : longint;var code : word);
var
base,u : byte;
negativ : boolean;
begin
l:=0;
Code:=InitVal(s,negativ,base);
if Code>length(s) then
exit;
if negativ and (s='-2147483648') then
begin
Code:=0;
l:=$80000000;
exit;
end;
while Code<=Length(s) do
begin
u:=ord(s[code]);
case u of
48..57 : u:=u-48;
65..70 : u:=u-55;
97..104 : u:=u-87;
else
u:=16;
end;
l:=l*longint(base);
if (u>=base) or ((base=10) and (2147483647-l<longint(u))) then
begin
l:=0;
exit;
end;
l:=l+u;
inc(code);
end;
code := 0;
if negativ then
l:=0-l;
end;
procedure val(const s : string;var l : longint;var code : integer);
begin
val(s,l,word(code));
end;
procedure val(const s : string;var l : longint);
var
code : word;
begin
val (s,l,code);
end;
procedure val(const s : string;var b : byte);
var
l : longint;
begin
val(s,l);
b:=l;
end;
procedure val(const s : string;var b : byte;var code : word);
var
l : longint;
begin
val(s,l,code);
b:=l;
end;
procedure val(const s : string;var b : byte;var code : Integer);
begin
val(s,b,word(code));
end;
procedure val(const s : string;var b : shortint);
var
l : longint;
begin
val(s,l);
b:=l;
end;
procedure val(const s : string;var b : shortint;var code : word);
var
l : longint;
begin
val(s,l,code);
b:=l;
end;
procedure val(const s : string;var b : shortint;var code : Int