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fpc/compiler/cutils.pas

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{
Copyright (c) 1998-2002 by Florian Klaempfl
This unit implements some support functions
This program 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 2 of the License, or
(at your option) any later version.
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. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
{# This unit contains some generic support functions which are used
in the different parts of the compiler.
}
unit cutils;
{$i fpcdefs.inc}
interface
uses
constexp;
type
Tcharset=set of char;
var
internalerrorproc : procedure(i:longint);
{# Returns the minimal value between @var(a) and @var(b) }
function min(a,b : longint) : longint;{$ifdef USEINLINE}inline;{$endif}
function min(a,b : int64) : int64;{$ifdef USEINLINE}inline;{$endif}
function min(a,b : qword) : qword;{$ifdef USEINLINE}inline;{$endif}
{# Returns the maximum value between @var(a) and @var(b) }
function max(a,b : longint) : longint;{$ifdef USEINLINE}inline;{$endif}
function max(a,b : int64) : int64;{$ifdef USEINLINE}inline;{$endif}
function max(a,b : qword) : qword;{$ifdef USEINLINE}inline;{$endif}
{ These functions are intenionally put here and not in the constexp unit.
Since Tconstexprint may be automatically converted to int, which causes
loss of data and since there are already min and max functions for ints in
this unit, we put min and max for Tconstexprint as well. This way we avoid
potential bugs, caused by code unintentionally calling the int versions of
min/max on Tconstexprint, because of only including cutils and forgetting
the constexp unit in the uses clause. }
function min(const a,b : Tconstexprint) : Tconstexprint;{$ifdef USEINLINE}inline;{$endif}
function max(const a,b : Tconstexprint) : Tconstexprint;{$ifdef USEINLINE}inline;{$endif}
{# Return value @var(i) aligned on @var(a) boundary }
function align(i,a:longint):longint;{$ifdef USEINLINE}inline;{$endif}
function align(i,a:int64):int64;{$ifdef USEINLINE}inline;{$endif}
function align(i,a:qword):qword;{$ifdef USEINLINE}inline;{$endif}
{ if you have an address aligned using "oldalignment" and add an
offset of (a multiple of) offset to it, this function calculates
the new minimally guaranteed alignment
}
function newalignment(oldalignment: longint; offset: int64): longint;
{# Return @var(b) with the bit order reversed }
function reverse_byte(b: byte): byte;
{# Return @var(w) with the bit order reversed }
function reverse_word(w: word): word;
{# Return @var(l) with the bit order reversed }
function reverse_longword(l: longword): longword;
function next_prime(l: longint): longint;
function used_align(varalign,minalign,maxalign:longint):longint;
function isbetteralignedthan(new, org, limit: cardinal): boolean;
function packedbitsloadsize(bitlen: int64) : int64;
procedure Replace(var s:string;s1:string;const s2:string);
procedure Replace(var s:AnsiString;s1:string;const s2:AnsiString);
procedure ReplaceCase(var s:string;const s1,s2:string);
procedure ReplaceCase(var s:ansistring;const s1,s2:ansistring);
Function MatchPattern(const pattern,what:string):boolean;
function upper(const c : char) : char;
function upper(const s : string) : string;
function upper(const s : ansistring) : ansistring;
function lower(const c : char) : char;
function lower(const s : string) : string;
function lower(const s : ansistring) : ansistring;
function rpos(const needle: char; const haystack: shortstring): longint; overload;
function rpos(const needle: shortstring; const haystack: shortstring): longint; overload;
function trimspace(const s:string):string;
function trimspace(const s:AnsiString):AnsiString;
function space (b : longint): string;
{ returns the position of the first char of the set cs in s, if there is none, then it returns 0 }
function PosCharset(const cs : TCharSet;const s : ansistring) : integer;
function PadSpace(const s:string;len:longint):string;
function PadSpace(const s:AnsiString;len:longint):AnsiString;
function GetToken(var s:string;endchar:char):string;
function GetToken(var s:ansistring;endchar:char):ansistring;
procedure uppervar(var s : string);
function realtostr(e:extended):string;{$ifdef USEINLINE}inline;{$endif}
function tostr(i : qword) : string;{$ifdef USEINLINE}inline;{$endif}overload;
function tostr(i : int64) : string;{$ifdef USEINLINE}inline;{$endif}overload;
function tostr(i : longint) : string;{$ifdef USEINLINE}inline;{$endif}overload;
function tostr_with_plus(i : int64) : string;{$ifdef USEINLINE}inline;{$endif}
function DStr(l:longint):string;
{# Returns true if the string s is a number }
function is_number(const s : string) : boolean;{$ifdef USEINLINE}inline;{$endif}
{# Returns true if value is a power of 2, the actual
exponent value is returned in power.
}
function ispowerof2(value : int64;out power : longint) : boolean;
function ispowerof2(const value : Tconstexprint;out power : longint) : boolean;
{# Returns true if abs(value) is a power of 2, the actual
exponent value is returned in power.
}
function isabspowerof2(const value : Tconstexprint; out power : longint) : boolean;
{ # Returns the power of 2 >= value }
function nextpowerof2(value : qword; out power: longint) : qword;
function backspace_quote(const s:string;const qchars:Tcharset):string;
function octal_quote(const s:string;const qchars:Tcharset):string;
{# If the string is quoted, in accordance with pascal, it is
dequoted and returned in s, and the function returns true.
If it is not quoted, or if the quoting is bad, s is not touched,
and false is returned.
}
function DePascalQuote(var s: ansistring): Boolean;
function CompareStr(const S1, S2: string): Integer;
function CompareText(S1, S2: string): integer;
{ releases the string p and assignes nil to p }
{ if p=nil then freemem isn't called }
procedure stringdispose(var p : pshortstring);{$ifdef USEINLINE}inline;{$endif}
{ allocates mem for a copy of s, copies s to this mem and returns }
{ a pointer to this mem }
function stringdup(const s : shortstring) : pshortstring;{$ifdef USEINLINE}inline;{$endif}
function stringdup(const s : ansistring) : pshortstring;{$ifdef USEINLINE}inline;{$endif}
{# Allocates memory for the string @var(s) and copies s as zero
terminated string to that allocated memory and returns a pointer
to that mem
}
function strpnew(const s : string) : pchar;
function strpnew(const s : ansistring) : pchar;
{# makes the character @var(c) lowercase, with spanish, french and german
character set
}
function lowercase(c : char) : char;
{ allocate a new pchar with the contents of a}
function ansistring2pchar(const a: ansistring) : pchar;
{ Ansistring (pchar+length) support }
procedure ansistringdispose(var p : pchar;length : longint);
function compareansistrings(p1,p2 : pchar;length1,length2 : longint) : longint;
function concatansistrings(p1,p2 : pchar;length1,length2 : longint) : pchar;
function LengthUleb128(a: qword) : byte;
function LengthSleb128(a: int64) : byte;
function EncodeUleb128(a: qword;out buf;len: byte) : byte;
function EncodeSleb128(a: int64;out buf;len: byte) : byte;
{ hide Sysutils.ExecuteProcess in units using this one after SysUtils}
const
ExecuteProcess = 'Do not use' deprecated 'Use cfileutil.RequotedExecuteProcess instead, ExecuteProcess cannot deal with single quotes as used by Unix command lines';
implementation
uses
SysUtils;
var
uppertbl,
lowertbl : array[char] of char;
function min(a,b : longint) : longint;{$ifdef USEINLINE}inline;{$endif}
{
return the minimal of a and b
}
begin
if a<=b then
min:=a
else
min:=b;
end;
function min(a,b : int64) : int64;{$ifdef USEINLINE}inline;{$endif}
{
return the minimal of a and b
}
begin
if a<=b then
min:=a
else
min:=b;
end;
function min(const a,b : Tconstexprint) : Tconstexprint;{$ifdef USEINLINE}inline;{$endif}
{
return the minimal of a and b
}
begin
if a<=b then
min:=a
else
min:=b;
end;
function min(a,b : qword) : qword;
{
return the minimal of a and b
}
begin
if a<=b then
min:=a
else
min:=b;
end;
function max(a,b : longint) : longint;{$ifdef USEINLINE}inline;{$endif}
{
return the maximum of a and b
}
begin
if a>=b then
max:=a
else
max:=b;
end;
function max(a,b : int64) : int64;{$ifdef USEINLINE}inline;{$endif}
{
return the maximum of a and b
}
begin
if a>=b then
max:=a
else
max:=b;
end;
function max(a,b : qword) : qword;{$ifdef USEINLINE}inline;{$endif}
{
return the maximum of a and b
}
begin
if a>=b then
max:=a
else
max:=b;
end;
function max(const a,b : Tconstexprint) : Tconstexprint;{$ifdef USEINLINE}inline;{$endif}
{
return the maximum of a and b
}
begin
if a>=b then
max:=a
else
max:=b;
end;
function newalignment(oldalignment: longint; offset: int64): longint;
begin
{ oldalignment must be power of two.
Negating two's complement number keeps its tail '100...000' and complements all bits above.
"x and -x" extracts this tail of 'x'.
Said tail of "oldalignment or offset" is the desired answer. }
result:=oldalignment or longint(offset); { high part of offset won't matter as long as alignment is 32-bit }
result:=result and -result;
end;
function reverse_byte(b: byte): byte;
const
reverse_nible:array[0..15] of 0..15 =
(%0000,%1000,%0100,%1100,%0010,%1010,%0110,%1110,
%0001,%1001,%0101,%1101,%0011,%1011,%0111,%1111);
begin
reverse_byte:=(reverse_nible[b and $f] shl 4) or reverse_nible[b shr 4];
end;
function reverse_word(w: word): word;
type
TWordRec = packed record
hi, lo: Byte;
end;
begin
TWordRec(reverse_word).hi := reverse_byte(TWordRec(w).lo);
TWordRec(reverse_word).lo := reverse_byte(TWordRec(w).hi);
end;
function reverse_longword(l: longword): longword;
type
TLongWordRec = packed record
b: array[0..3] of Byte;
end;
begin
TLongWordRec(reverse_longword).b[0] := reverse_byte(TLongWordRec(l).b[3]);
TLongWordRec(reverse_longword).b[1] := reverse_byte(TLongWordRec(l).b[2]);
TLongWordRec(reverse_longword).b[2] := reverse_byte(TLongWordRec(l).b[1]);
TLongWordRec(reverse_longword).b[3] := reverse_byte(TLongWordRec(l).b[0]);
end;
function align(i,a:longint):longint;{$ifdef USEINLINE}inline;{$endif}
{
return value <i> aligned <a> boundary. <a> must be power of two.
}
begin
{ One-line formula for i >= 0 is
>>> (i + a - 1) and not (a - 1),
and for i < 0 is
>>> i and not (a - 1). }
if a>0 then
a:=a-1; { 'a' is decremented beforehand, this also allows a=0 as a synonym for a=1. }
if i>=0 then
i:=i+a;
result:=i and not a;
end;
function align(i,a:int64):int64;{$ifdef USEINLINE}inline;{$endif}
{
return value <i> aligned <a> boundary. <a> must be power of two.
}
begin
{ Copy of 'longint' version. }
if a>0 then
a:=a-1;
if i>=0 then
i:=i+a;
result:=i and not a;
end;
function align(i,a:qword):qword;{$ifdef USEINLINE}inline;{$endif}
{
return value <i> aligned <a> boundary. <a> must be power of two.
}
begin
{ No i < 0 case here. }
if a>0 then
a:=a-1;
result:=(i+a) and not a;
end;
function packedbitsloadsize(bitlen: int64) : int64;
begin
case bitlen of
1,2,4,8:
result := 1;
{ 10 bits can never be split over 3 bytes via 1-8-1, because it }
{ always starts at a multiple of 10 bits. Same for the others. }
3,5,6,7,9,10,12,16:
result := 2;
{$ifdef cpu64bitalu}
{ performance penalty for unaligned 8 byte access is much }
{ higher than for unaligned 4 byte access, at least on ppc, }
{ so use 4 bytes even in some cases where a value could }
{ always loaded using a single 8 byte load (e.g. in case of }
{ 28 bit values) }
11,13,14,15,17..32:
result := 4;
else
result := 8;
{$else cpu64bitalu}
else
result := 4;
{$endif cpu64bitalu}
end;
end;
function isbetteralignedthan(new, org, limit: cardinal): boolean;
var
cnt: cardinal;
begin
cnt:=2;
while (cnt <= limit) do
begin
if (org and (cnt-1)) > (new and (cnt-1)) then
begin
result:=true;
exit;
end
else if (org and (cnt-1)) < (new and (cnt-1)) then
begin
result:=false;
exit;
end;
cnt:=cnt*2;
end;
result:=false;
end;
function next_prime(l: longint): longint;
var
check, checkbound: longint;
ok: boolean;
begin
result:=l or 1;
while l<high(longint) do
begin
ok:=true;
checkbound:=trunc(sqrt(l));
check:=3;
while check<checkbound do
begin
if (l mod check) = 0 then
begin
ok:=false;
break;
end;
inc(check,2);
end;
if ok then
exit;
inc(l);
end;
end;
function used_align(varalign,minalign,maxalign:longint):longint;
begin
{ varalign : minimum alignment required for the variable
minalign : Minimum alignment of this structure, 0 = undefined
maxalign : Maximum alignment of this structure, 0 = undefined }
if (minalign>0) and
(varalign<=minalign) then
used_align:=minalign
else
begin
if (maxalign>0) and
(varalign>maxalign) then
used_align:=maxalign
else
used_align:=varalign;
end;
end;
procedure Replace(var s:string;s1:string;const s2:string);
var
last,
i : longint;
begin
s1:=upper(s1);
last:=0;
repeat
i:=pos(s1,upper(s));
if i=last then
i:=0;
if (i>0) then
begin
Delete(s,i,length(s1));
Insert(s2,s,i);
last:=i;
end;
until (i=0);
end;
procedure Replace(var s:AnsiString;s1:string;const s2:AnsiString);
var
last,
i : longint;
begin
s1:=upper(s1);
last:=0;
repeat
i:=pos(s1,upper(s));
if i=last then
i:=0;
if (i>0) then
begin
Delete(s,i,length(s1));
Insert(s2,s,i);
last:=i;
end;
until (i=0);
end;
procedure ReplaceCase(var s:string;const s1,s2:string);
var
last,
i : longint;
begin
last:=0;
repeat
i:=pos(s1,s);
if i=last then
i:=0;
if (i>0) then
begin
Delete(s,i,length(s1));
Insert(s2,s,i);
last:=i;
end;
until (i=0);
end;
procedure ReplaceCase(var s: ansistring; const s1, s2: ansistring);
var
last,
i : longint;
begin
last:=0;
repeat
i:=pos(s1,s);
if i=last then
i:=0;
if (i>0) then
begin
Delete(s,i,length(s1));
Insert(s2,s,i);
last:=i;
end;
until (i=0);
end;
Function MatchPattern(const pattern,what:string):boolean;
var
found : boolean;
i1,i2 : longint;
begin
i1:=0;
i2:=0;
if pattern='' then
begin
result:=(what='');
exit;
end;
found:=true;
repeat
inc(i1);
if (i1>length(pattern)) then
break;
inc(i2);
if (i2>length(what)) then
break;
case pattern[i1] of
'?' :
found:=true;
'*' :
begin
found:=true;
if (i1=length(pattern)) then
i2:=length(what)
else
if (i1<length(pattern)) and (pattern[i1+1]<>what[i2]) then
begin
if i2<length(what) then
dec(i1)
end
else
if i2>1 then
dec(i2);
end;
else
found:=(pattern[i1]=what[i2]) or (what[i2]='?');
end;
until not found;
if found then
begin
found:=(i2>=length(what)) and
(
(i1>length(pattern)) or
((i1=length(pattern)) and
(pattern[i1]='*'))
);
end;
result:=found;
end;
function upper(const c : char) : char;
{
return uppercase of c
}
begin
upper:=uppertbl[c];
end;
function upper(const s : string) : string;
{
return uppercased string of s
}
var
i : longint;
begin
for i:=1 to length(s) do
upper[i]:=uppertbl[s[i]];
upper[0]:=s[0];
end;
function upper(const s : ansistring) : ansistring;
{
return uppercased string of s
}
var
i,n : sizeint;
begin
Result:=s;
n:=length(s);
i:=0;
while i<n do
if PChar(Pointer(s))[i] in ['a'..'z'] then
begin
UniqueString(Result);
repeat
PChar(Pointer(Result))[i]:=uppertbl[PChar(Pointer(s))[i]];
inc(i);
until i=n;
exit;
end
else
inc(i);
end;
function lower(const c : char) : char;
{
return lowercase of c
}
begin
lower:=lowertbl[c];
end;
function lower(const s : string) : string;
{
return lowercased string of s
}
var
i : longint;
begin
for i:=1 to length(s) do
lower[i]:=lowertbl[s[i]];
lower[0]:=s[0];
end;
function lower(const s : ansistring) : ansistring;
{
return lowercased string of s
}
var
i,n : sizeint;
begin
Result:=s;
n:=length(s);
i:=0;
while i<n do
if PChar(Pointer(s))[i] in ['A'..'Z'] then
begin
UniqueString(Result);
repeat
PChar(Pointer(Result))[i]:=lowertbl[PChar(Pointer(s))[i]];
inc(i);
until i=n;
exit;
end
else
inc(i);
end;
procedure uppervar(var s : string);
{
uppercase string s
}
var
i : longint;
begin
for i:=1 to length(s) do
s[i]:=uppertbl[s[i]];
end;
procedure initupperlower;
var
c : char;
begin
for c:=#0 to #255 do
begin
lowertbl[c]:=c;
uppertbl[c]:=c;
case c of
'A'..'Z' :
lowertbl[c]:=char(byte(c)+32);
'a'..'z' :
uppertbl[c]:=char(byte(c)-32);
end;
end;
end;
function DStr(l:longint):string;
var
TmpStr : string[32];
i : longint;
begin
Str(l,TmpStr);
i:=Length(TmpStr);
while (i>3) do
begin
dec(i,3);
if TmpStr[i]<>'-' then
insert('.',TmpStr,i+1);
end;
DStr:=TmpStr;
end;
function rpos(const needle: char; const haystack: shortstring): longint;
begin
result:=length(haystack);
while (result>0) do
begin
if haystack[result]=needle then
exit;
dec(result);
end;
end;
function rpos(const needle: shortstring; const haystack: shortstring): longint;
begin
result:=0;
if (length(needle)=0) or
(length(needle)>length(haystack)) then
exit;
result:=length(haystack)-length(needle)+1;
repeat
if (haystack[result]=needle[1]) and
(CompareByte(haystack[result],needle[1],length(needle))=0) then
exit;
dec(result);
until result=0;
end;
function trimspace(const s:string):string;
{
return s with all leading and ending spaces and tabs removed
}
var
i,j : longint;
begin
i:=length(s);
while (i>0) and (s[i] in [#9,' ']) do
dec(i);
j:=1;
while (j<i) and (s[j] in [#9,' ']) do
inc(j);
trimspace:=Copy(s,j,i-j+1);
end;
function trimspace(const s:AnsiString):AnsiString;
{
return s with all leading and ending spaces and tabs removed
}
var
i,j : longint;
begin
i:=length(s);
while (i>0) and (s[i] in [#9,' ']) do
dec(i);
j:=1;
while (j<i) and (s[j] in [#9,' ']) do
inc(j);
trimspace:=Copy(s,j,i-j+1);
end;
function space (b : longint): string;
var
s: string;
begin
space[0] := chr(b);
s[0] := chr(b);
FillChar (S[1],b,' ');
space:=s;
end;
function PadSpace(const s:string;len:longint):string;
{
return s with spaces add to the end
}
begin
if length(s)<len then
PadSpace:=s+Space(len-length(s))
else
PadSpace:=s;
end;
function PadSpace(const s:AnsiString;len:longint):AnsiString;
{
return s with spaces add to the end
}
begin
if length(s)<len then
PadSpace:=s+Space(len-length(s))
else
PadSpace:=s;
end;
function GetToken(var s:string;endchar:char):string;
var
i : longint;
quote : char;
begin
GetToken:='';
s:=TrimSpace(s);
if (length(s)>0) and
(s[1] in ['''','"']) then
begin
quote:=s[1];
i:=1;
while (i<length(s)) do
begin
inc(i);
if s[i]=quote then
begin
{ Remove double quote }
if (i<length(s)) and
(s[i+1]=quote) then
begin
Delete(s,i,1);
inc(i);
end
else
begin
GetToken:=Copy(s,2,i-2);
Delete(s,1,i);
exit;
end;
end;
end;
GetToken:=s;
s:='';
end
else
begin
i:=pos(EndChar,s);
if i=0 then
begin
GetToken:=s;
s:='';
exit;
end
else
begin
GetToken:=Copy(s,1,i-1);
Delete(s,1,i);
exit;
end;
end;
end;
function GetToken(var s:ansistring;endchar:char):ansistring;
var
i : longint;
quote : char;
begin
GetToken:='';
s:=TrimSpace(s);
if (length(s)>0) and
(s[1] in ['''','"']) then
begin
quote:=s[1];
i:=1;
while (i<length(s)) do
begin
inc(i);
if s[i]=quote then
begin
{ Remove double quote }
if (i<length(s)) and
(s[i+1]=quote) then
begin
Delete(s,i,1);
inc(i);
end
else
begin
GetToken:=Copy(s,2,i-2);
Delete(s,1,i);
exit;
end;
end;
end;
GetToken:=s;
s:='';
end
else
begin
i:=pos(EndChar,s);
if i=0 then
begin
GetToken:=s;
s:='';
exit;
end
else
begin
GetToken:=Copy(s,1,i-1);
Delete(s,1,i);
exit;
end;
end;
end;
function realtostr(e:extended):string;{$ifdef USEINLINE}inline;{$endif}
begin
str(e,result);
end;
function tostr(i : qword) : string;{$ifdef USEINLINE}inline;{$endif}overload;
{
return string of value i
}
begin
str(i,result);
end;
function tostr(i : int64) : string;{$ifdef USEINLINE}inline;{$endif}overload;
{
return string of value i
}
begin
str(i,result);
end;
function tostr(i : longint) : string;{$ifdef USEINLINE}inline;{$endif}overload;
{
return string of value i
}
begin
str(i,result);
end;
function tostr_with_plus(i : int64) : string;{$ifdef USEINLINE}inline;{$endif}
{
return string of value i, but always include a + when i>=0
}
begin
str(i,result);
if i>=0 then
result:='+'+result;
end;
function is_number(const s : string) : boolean;{$ifdef USEINLINE}inline;{$endif}
{
is string a correct number ?
}
var
w : integer;
l : longint;
begin
val(s,l,w);
// remove warning
l:=l;
is_number:=(w=0);
end;
function ispowerof2(value : int64;out power : longint) : boolean;
{
return if value is a power of 2. And if correct return the power
}
begin
if (value <= 0) or (value and (value - 1) <> 0) then
exit(false);
power:=BsfQWord(value);
result:=true;
end;
function ispowerof2(const value: Tconstexprint; out power: longint): boolean;
begin
if value.signed or
(value.uvalue<=high(int64)) then
result:=ispowerof2(value.svalue,power)
else if not value.signed and
(value.svalue=low(int64)) then
begin
result:=true;
power:=63;
end
else
result:=false;
end;
function isabspowerof2(const value : Tconstexprint;out power : longint) : boolean;
begin
if ispowerof2(value,power) then
result:=true
else if value.signed and (value.svalue<0) and (value.svalue<>low(int64)) and ispowerof2(-value.svalue,power) then
result:=true
else
result:=false;
end;
function nextpowerof2(value : qword; out power: longint) : qword;
begin
power:=-1;
result:=0;
if (value=0) or (value>qword($8000000000000000)) then
exit;
power:=BsrQWord(value);
result:=qword(1) shl power;
if (value and (value-1))<>0 then
begin
inc(power);
result:=result shl 1;
end;
end;
function backspace_quote(const s:string;const qchars:Tcharset):string;
var i:byte;
begin
backspace_quote:='';
for i:=1 to length(s) do
begin
if (s[i]=#10) and (#10 in qchars) then
backspace_quote:=backspace_quote+'\n'
else if (s[i]=#13) and (#13 in qchars) then
backspace_quote:=backspace_quote+'\r'
else
begin
if s[i] in qchars then
backspace_quote:=backspace_quote+'\';
backspace_quote:=backspace_quote+s[i];
end;
end;
end;
function octal_quote(const s:string;const qchars:Tcharset):string;
var i:byte;
begin
octal_quote:='';
for i:=1 to length(s) do
begin
if s[i] in qchars then
begin
if ord(s[i])<64 then
octal_quote:=octal_quote+'\'+octstr(ord(s[i]),3)
else
octal_quote:=octal_quote+'\'+octstr(ord(s[i]),4);
end
else
octal_quote:=octal_quote+s[i];
end;
end;
function DePascalQuote(var s: ansistring): Boolean;
var
destPos, sourcePos, len: Integer;
t: string;
ch: Char;
begin
t:='';
DePascalQuote:= false;
len:= length(s);
if (len >= 1) and (s[1] = '''') then
begin
{Remove quotes, exchange '' against ' }
destPos := 0;
sourcepos:=1;
while (sourcepos<len) do
begin
inc(sourcePos);
ch := s[sourcePos];
if ch = '''' then
begin
inc(sourcePos);
if (sourcePos <= len) and (s[sourcePos] = '''') then
{Add the quote as part of string}
else
begin
SetLength(t, destPos);
s:= t;
Exit(true);
end;
end;
inc(destPos);
t[destPos] := ch;
end;
end;
end;
function ansistring2pchar(const a: ansistring) : pchar;
var
len: ptrint;
begin
len:=length(a);
getmem(result,len+1);
if (len<>0) then
move(a[1],result[0],len);
result[len]:=#0;
end;
function lowercase(c : char) : char;
begin
case c of
#65..#90 : c := chr(ord (c) + 32);
#154 : c:=#129; { german }
#142 : c:=#132; { german }
#153 : c:=#148; { german }
#144 : c:=#130; { french }
#128 : c:=#135; { french }
#143 : c:=#134; { swedish/norge (?) }
#165 : c:=#164; { spanish }
#228 : c:=#229; { greek }
#226 : c:=#231; { greek }
#232 : c:=#227; { greek }
end;
lowercase := c;
end;
function strpnew(const s : string) : pchar;
var
p : pchar;
begin
getmem(p,length(s)+1);
move(s[1],p^,length(s));
p[length(s)]:=#0;
result:=p;
end;
function strpnew(const s: ansistring): pchar;
var
p : pchar;
begin
getmem(p,length(s)+1);
move(s[1],p^,length(s)+1);
result:=p;
end;
procedure stringdispose(var p : pshortstring);{$ifdef USEINLINE}inline;{$endif}
begin
if assigned(p) then
begin
freemem(p);
p:=nil;
end;
end;
function stringdup(const s : shortstring) : pshortstring;{$ifdef USEINLINE}inline;{$endif}
begin
getmem(result,length(s)+1);
result^:=s;
end;
function stringdup(const s : ansistring) : pshortstring;{$ifdef USEINLINE}inline;{$endif}
begin
getmem(result,length(s)+1);
result^:=s;
end;
function PosCharset(const cs : TCharSet;const s : ansistring) : integer;
var
i : integer;
begin
result:=0;
for i:=1 to length(s) do
if s[i] in cs then
begin
result:=i;
exit;
end;
end;
function CompareStr(const S1, S2: string): Integer;
var
count, count1, count2: integer;
begin
Count1 := Length(S1);
Count2 := Length(S2);
if Count1>Count2 then
Count:=Count2
else
Count:=Count1;
result := CompareByte(S1[1],S2[1], Count);
if result=0 then
result:=Count1-Count2;
end;
function CompareText(S1, S2: string): integer;
begin
UpperVar(S1);
UpperVar(S2);
Result:=CompareStr(S1,S2);
end;
{*****************************************************************************
Ansistring (PChar+Length)
*****************************************************************************}
procedure ansistringdispose(var p : pchar;length : longint);
begin
if assigned(p) then
begin
freemem(p);
p:=nil;
end;
end;
{ enable ansistring comparison }
{ 0 means equal }
{ 1 means p1 > p2 }
{ -1 means p1 < p2 }
function compareansistrings(p1,p2 : pchar;length1,length2 : longint) : longint;
var
cmp : SizeInt;
begin
cmp:=CompareByte(p1^,p2^,min(length1,length2));
if cmp=0 then
cmp:=length1-length2;
result:=ord(cmp>0)-ord(cmp<0);
end;
function concatansistrings(p1,p2 : pchar;length1,length2 : longint) : pchar;
var
p : pchar;
begin
getmem(p,length1+length2+1);
move(p1[0],p[0],length1);
move(p2[0],p[length1],length2+1);
concatansistrings:=p;
end;
procedure defaulterror(i:longint);
begin
writeln('Internal error ',i);
runerror(255);
end;
function LengthUleb128(a: qword) : byte;
begin
result:=0;
repeat
inc(result);
a := a shr 7;
until a=0;
end;
function LengthSleb128(a: int64) : byte;
begin
{ 'a xor SarInt64(a,63)' has upper bits 0...01 where '0's symbolize sign bits of 'a' and 1 symbolizes its most significant non-sign bit.
'shl 1' ensures storing the sign bit. }
result:=LengthUleb128(qword(a xor SarInt64(a,63)) shl 1);
end;
function EncodeUleb128(a: qword;out buf;len : byte) : byte;
var
b: byte;
pbuf : pbyte;
begin
result:=0;
pbuf:=@buf;
repeat
b := a and $7f;
a := a shr 7;
if a<>0 then
b := b or $80;
pbuf^:=b;
inc(pbuf);
inc(result);
until (a=0) and (result>=len);
end;
function EncodeSleb128(a: int64;out buf;len : byte) : byte;
var
b: byte;
more: boolean;
pbuf : pbyte;
begin
result:=0;
pbuf:=@buf;
repeat
b := a and $7f;
a := SarInt64(a, 7);
inc(result);
more:=(result<len) or (a<>-(b shr 6));
pbuf^:=b or byte(more) shl 7;
inc(pbuf);
until not more;
end;
initialization
internalerrorproc:=@defaulterror;
initupperlower;
end.
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