diff --git a/src/shared/utils.pas b/src/shared/utils.pas
index 76edd1fa841914c413dc12404c6d8ed7ab59b88e..253e838961316e5bd5e2b19595ba10d7760e033a 100644 (file)
--- a/src/shared/utils.pas
+++ b/src/shared/utils.pas
+(* Copyright (C) DooM 2D:Forever Developers
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *)
{$MODE DELPHI}
unit utils;
interface
+uses
+ SysUtils, Classes;
+
+
// does filename have one of ".wad", ".pk3", ".zip" extensions?
-function hasWadExtension (fn: string): Boolean;
+function hasWadExtension (fn: AnsiString): Boolean;
// does filepath have ".XXX:\" in it?
-function isWadPath (fn: string): Boolean;
+function isWadPath (fn: AnsiString): Boolean;
// adds ".wad" extension if filename doesn't have one of ".wad", ".pk3", ".zip"
-function addWadExtension (fn: string): string;
+function addWadExtension (fn: AnsiString): AnsiString;
+// convert number to strig with nice commas
+function Int64ToStrComma (i: Int64): AnsiString;
-implementation
+function UpCase1251 (ch: Char): Char;
+function LoCase1251 (ch: Char): Char;
-uses
- SysUtils, sfs;
+// `true` if strings are equal; ignoring case for cp1251
+function StrEquCI1251 (const s0, s1: AnsiString): Boolean;
+
+function utf8Valid (const s: AnsiString): Boolean;
+
+function utf8to1251 (s: AnsiString): AnsiString;
+
+// `pathname` will be modified if path is valid
+// `lastIsDir` should be `true` if we are searching for directory
+// nobody cares about shitdoze, so i'll use the same code path for it
+function findFileCI (var pathname: AnsiString; lastIsDir: Boolean=false): Boolean;
+
+// they throws
+function openDiskFileRO (pathname: AnsiString): TStream;
+function createDiskFile (pathname: AnsiString): TStream;
+
+// little endian
+procedure writeInt (st: TStream; v: Byte); overload;
+procedure writeInt (st: TStream; v: ShortInt); overload;
+procedure writeInt (st: TStream; v: Word); overload;
+procedure writeInt (st: TStream; v: SmallInt); overload;
+procedure writeInt (st: TStream; v: LongWord); overload;
+procedure writeInt (st: TStream; v: LongInt); overload;
+procedure writeInt (st: TStream; v: Int64); overload;
+procedure writeInt (st: TStream; v: UInt64); overload;
+function readByte (st: TStream): Byte;
+function readShortInt (st: TStream): ShortInt;
+function readWord (st: TStream): Word;
+function readSmallInt (st: TStream): SmallInt;
+function readLongWord (st: TStream): LongWord;
+function readLongInt (st: TStream): LongInt;
+function readInt64 (st: TStream): Int64;
+function readUInt64 (st: TStream): UInt64;
-function hasWadExtension (fn: string): Boolean;
+// big endian
+procedure writeIntBE (st: TStream; v: Byte); overload;
+procedure writeIntBE (st: TStream; v: ShortInt); overload;
+procedure writeIntBE (st: TStream; v: Word); overload;
+procedure writeIntBE (st: TStream; v: SmallInt); overload;
+procedure writeIntBE (st: TStream; v: LongWord); overload;
+procedure writeIntBE (st: TStream; v: LongInt); overload;
+procedure writeIntBE (st: TStream; v: Int64); overload;
+procedure writeIntBE (st: TStream; v: UInt64); overload;
+
+function readByteBE (st: TStream): Byte;
+function readShortIntBE (st: TStream): ShortInt;
+function readWordBE (st: TStream): Word;
+function readSmallIntBE (st: TStream): SmallInt;
+function readLongWordBE (st: TStream): LongWord;
+function readLongIntBE (st: TStream): LongInt;
+function readInt64BE (st: TStream): Int64;
+function readUInt64BE (st: TStream): UInt64;
+
+
+implementation
+
+
+function hasWadExtension (fn: AnsiString): Boolean;
begin
fn := ExtractFileExt(fn);
- result := SFSStrEqu(fn, '.wad') or SFSStrEqu(fn, '.pk3') or SFSStrEqu(fn, '.zip');
+ result := StrEquCI1251(fn, '.wad') or StrEquCI1251(fn, '.pk3') or StrEquCI1251(fn, '.zip');
end;
-function addWadExtension (fn: string): string;
+function addWadExtension (fn: AnsiString): AnsiString;
begin
result := fn;
if not hasWadExtension(result) then result := result+'.wad';
end;
-function isWadPath (fn: string): Boolean;
+function isWadPath (fn: AnsiString): Boolean;
var
p: Integer;
- s: string;
+ s: AnsiString;
begin
result := false;
while true do
if (p-4 > 1) and (fn[p-4] = '.') and ((fn[p+1] = '\') or (fn[p+1] = '/')) then
begin
s := Copy(fn, p-4, 4);
- if SFSStrEqu(s, '.wad') or SFSStrEqu(s, '.pk3') or SFSStrEqu(s, '.zip') then
+ if StrEquCI1251(s, '.wad') or StrEquCI1251(s, '.pk3') or StrEquCI1251(s, '.zip') then
begin
result := true;
exit;
end;
+function Int64ToStrComma (i: Int64): AnsiString;
+var
+ f: Integer;
+begin
+ Str(i, result);
+ f := Length(result)+1;
+ while f > 4 do
+ begin
+ Dec(f, 3); Insert(',', result, f);
+ end;
+end;
+
+
+function UpCase1251 (ch: Char): Char;
+begin
+ if ch < #128 then
+ begin
+ if (ch >= 'a') and (ch <= 'z') then Dec(ch, 32);
+ end
+ else
+ begin
+ if (ch >= #224) and (ch <= #255) then
+ begin
+ Dec(ch, 32);
+ end
+ else
+ begin
+ case ch of
+ #184, #186, #191: Dec(ch, 16);
+ #162, #179: Dec(ch);
+ end;
+ end;
+ end;
+ result := ch;
+end;
+
+
+function LoCase1251 (ch: Char): Char;
+begin
+ if ch < #128 then
+ begin
+ if (ch >= 'A') and (ch <= 'Z') then Inc(ch, 32);
+ end
+ else
+ begin
+ if (ch >= #192) and (ch <= #223) then
+ begin
+ Inc(ch, 32);
+ end
+ else
+ begin
+ case ch of
+ #168, #170, #175: Inc(ch, 16);
+ #161, #178: Inc(ch);
+ end;
+ end;
+ end;
+ result := ch;
+end;
+
+
+function StrEquCI1251 (const s0, s1: AnsiString): Boolean;
+var
+ i: Integer;
+begin
+ result := false;
+ if length(s0) <> length(s1) then exit;
+ for i := 1 to length(s0) do if UpCase1251(s0[i]) <> UpCase1251(s1[i]) then exit;
+ result := true;
+end;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+// utils
+// `ch`: utf8 start
+// -1: invalid utf8
+function utf8CodeLen (ch: Word): Integer;
+begin
+ if ch < $80 then begin result := 1; exit; end;
+ if (ch and $FE) = $FC then begin result := 6; exit; end;
+ if (ch and $FC) = $F8 then begin result := 5; exit; end;
+ if (ch and $F8) = $F0 then begin result := 4; exit; end;
+ if (ch and $F0) = $E0 then begin result := 3; exit; end;
+ if (ch and $E0) = $C0 then begin result := 2; exit; end;
+ result := -1; // invalid
+end;
+
+
+function utf8Valid (const s: AnsiString): Boolean;
+var
+ pos, len: Integer;
+begin
+ result := false;
+ pos := 1;
+ while pos <= length(s) do
+ begin
+ len := utf8CodeLen(Byte(s[pos]));
+ if len < 1 then exit; // invalid sequence start
+ if pos+len-1 > length(s) then exit; // out of chars in string
+ Dec(len);
+ Inc(pos);
+ // check other sequence bytes
+ while len > 0 do
+ begin
+ if (Byte(s[pos]) and $C0) <> $80 then exit;
+ Dec(len);
+ Inc(pos);
+ end;
+ end;
+ result := true;
+end;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+const
+ uni2wint: array [128..255] of Word = (
+ $0402,$0403,$201A,$0453,$201E,$2026,$2020,$2021,$20AC,$2030,$0409,$2039,$040A,$040C,$040B,$040F,
+ $0452,$2018,$2019,$201C,$201D,$2022,$2013,$2014,$003F,$2122,$0459,$203A,$045A,$045C,$045B,$045F,
+ $00A0,$040E,$045E,$0408,$00A4,$0490,$00A6,$00A7,$0401,$00A9,$0404,$00AB,$00AC,$00AD,$00AE,$0407,
+ $00B0,$00B1,$0406,$0456,$0491,$00B5,$00B6,$00B7,$0451,$2116,$0454,$00BB,$0458,$0405,$0455,$0457,
+ $0410,$0411,$0412,$0413,$0414,$0415,$0416,$0417,$0418,$0419,$041A,$041B,$041C,$041D,$041E,$041F,
+ $0420,$0421,$0422,$0423,$0424,$0425,$0426,$0427,$0428,$0429,$042A,$042B,$042C,$042D,$042E,$042F,
+ $0430,$0431,$0432,$0433,$0434,$0435,$0436,$0437,$0438,$0439,$043A,$043B,$043C,$043D,$043E,$043F,
+ $0440,$0441,$0442,$0443,$0444,$0445,$0446,$0447,$0448,$0449,$044A,$044B,$044C,$044D,$044E,$044F
+ );
+
+
+function decodeUtf8Char (s: AnsiString; var pos: Integer): char;
+var
+ b, c: Integer;
+begin
+ (* The following encodings are valid, except for the 5 and 6 byte
+ * combinations:
+ * 0xxxxxxx
+ * 110xxxxx 10xxxxxx
+ * 1110xxxx 10xxxxxx 10xxxxxx
+ * 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+ * 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ * 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ *)
+ result := '?';
+ if pos > length(s) then exit;
+
+ b := Byte(s[pos]);
+ Inc(pos);
+ if b < $80 then begin result := char(b); exit; end;
+
+ // mask out unused bits
+ if (b and $FE) = $FC then b := b and $01
+ else if (b and $FC) = $F8 then b := b and $03
+ else if (b and $F8) = $F0 then b := b and $07
+ else if (b and $F0) = $E0 then b := b and $0F
+ else if (b and $E0) = $C0 then b := b and $1F
+ else exit; // invalid utf8
+
+ // now continue
+ while pos <= length(s) do
+ begin
+ c := Byte(s[pos]);
+ if (c and $C0) <> $80 then break; // no more
+ b := b shl 6;
+ b := b or (c and $3F);
+ Inc(pos);
+ end;
+
+ // done, try 1251
+ for c := 128 to 255 do if uni2wint[c] = b then begin result := char(c and $FF); exit; end;
+ // alas
+end;
+
+
+function utf8to1251 (s: AnsiString): AnsiString;
+var
+ pos: Integer;
+begin
+ if not utf8Valid(s) then begin result := s; exit; end;
+ pos := 1;
+ while pos <= length(s) do
+ begin
+ if Byte(s[pos]) >= $80 then break;
+ Inc(pos);
+ end;
+ if pos > length(s) then begin result := s; exit; end; // nothing to do here
+ result := '';
+ pos := 1;
+ while pos <= length(s) do result := result+decodeUtf8Char(s, pos);
+end;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+// `pathname` will be modified if path is valid
+// `lastIsDir` should be `true` if we are searching for directory
+// nobody cares about shitdoze, so i'll use the same code path for it
+function findFileCI (var pathname: AnsiString; lastIsDir: Boolean=false): Boolean;
+var
+ sr: TSearchRec;
+ npt: AnsiString;
+ newname: AnsiString = '';
+ curname: AnsiString;
+ wantdir: Boolean;
+ attr: LongInt;
+ foundher: Boolean;
+begin
+ npt := pathname;
+ result := (length(npt) > 0);
+ if (length(npt) > 0) and ((npt[1] = '/') or (npt[1] = '\')) then newname := '/';
+ while length(npt) > 0 do
+ begin
+ // remove trailing slashes
+ while (length(npt) > 0) and ((npt[1] = '/') or (npt[1] = '\')) do Delete(npt, 1, 1);
+ if length(npt) = 0 then break;
+ // extract name
+ curname := '';
+ while (length(npt) > 0) and (npt[1] <> '/') and (npt[1] <> '\') do
+ begin
+ curname := curname+npt[1];
+ Delete(npt, 1, 1);
+ end;
+ // remove trailing slashes again
+ while (length(npt) > 0) and ((npt[1] = '/') or (npt[1] = '\')) do Delete(npt, 1, 1);
+ wantdir := lastIsDir or (length(npt) > 0); // do we want directory here?
+ //writeln(Format('npt=[%s]; newname=[%s]; curname=[%s]; wantdir=%d', [npt, newname, curname, Integer(wantdir)]));
+ // try the easiest case first
+ attr := FileGetAttr(newname+curname);
+ if attr <> -1 then
+ begin
+ if wantdir = ((attr and faDirectory) <> 0) then
+ begin
+ // i found her!
+ newname := newname+curname;
+ if wantdir then newname := newname+'/';
+ continue;
+ end;
+ end;
+ //writeln(Format('npt=[%s]; newname=[%s]; curname=[%s]; wantdir=%d', [npt, newname, curname, Integer(wantdir)]));
+ // alas, either not found, or invalid attributes
+ foundher := false;
+ try
+ if FindFirst(newname+'*', faAnyFile, sr) = 0 then
+ repeat
+ if (wantdir = ((sr.attr and faDirectory) <> 0)) and StrEquCI1251(sr.name, curname) then
+ begin
+ // i found her!
+ newname := newname+sr.name;
+ if wantdir then newname := newname+'/';
+ foundher := true;
+ break;
+ end;
+ until FindNext(sr) <> 0;
+ finally
+ FindClose(sr);
+ end;
+ if not foundher then begin newname := ''; result := false; break; end;
+ end;
+ if result then pathname := newname;
+end;
+
+
+function openDiskFileRO (pathname: AnsiString): TStream;
+begin
+ if not findFileCI(pathname) then raise Exception.Create('can''t open file "'+pathname+'"');
+ result := TFileStream.Create(pathname, fmOpenRead or {fmShareDenyWrite}fmShareDenyNone);
+end;
+
+function createDiskFile (pathname: AnsiString): TStream;
+var
+ path: AnsiString;
+begin
+ path := ExtractFilePath(pathname);
+ if length(path) > 0 then
+ begin
+ if not findFileCI(path, true) then raise Exception.Create('can''t create file "'+pathname+'"');
+ end;
+ result := TFileStream.Create(path+ExtractFileName(pathname), fmCreate);
+end;
+
+
+procedure writeIntegerLE (st: TStream; vp: Pointer; size: Integer);
+{$IFDEF ENDIAN_LITTLE}
+begin
+ st.writeBuffer(vp^, size);
+end;
+{$ELSE}
+var
+ p: PByte;
+begin
+ p := PByte(vp)+size-1;
+ while size > 0 do
+ begin
+ st.writeBuffer(p^, 1);
+ Dec(size);
+ Dec(p);
+ end;
+end;
+{$ENDIF}
+
+procedure writeIntegerBE (st: TStream; vp: Pointer; size: Integer);
+{$IFDEF ENDIAN_LITTLE}
+var
+ p: PByte;
+begin
+ p := PByte(vp)+size-1;
+ while size > 0 do
+ begin
+ st.writeBuffer(p^, 1);
+ Dec(size);
+ Dec(p);
+ end;
+end;
+{$ELSE}
+begin
+ st.writeBuffer(vp^, size);
+end;
+{$ENDIF}
+
+procedure writeInt (st: TStream; v: Byte); overload; begin writeIntegerLE(st, @v, 1); end;
+procedure writeInt (st: TStream; v: ShortInt); overload; begin writeIntegerLE(st, @v, 1); end;
+procedure writeInt (st: TStream; v: Word); overload; begin writeIntegerLE(st, @v, 2); end;
+procedure writeInt (st: TStream; v: SmallInt); overload; begin writeIntegerLE(st, @v, 2); end;
+procedure writeInt (st: TStream; v: LongWord); overload; begin writeIntegerLE(st, @v, 4); end;
+procedure writeInt (st: TStream; v: LongInt); overload; begin writeIntegerLE(st, @v, 4); end;
+procedure writeInt (st: TStream; v: Int64); overload; begin writeIntegerLE(st, @v, 8); end;
+procedure writeInt (st: TStream; v: UInt64); overload; begin writeIntegerLE(st, @v, 8); end;
+
+procedure writeIntBE (st: TStream; v: Byte); overload; begin writeIntegerBE(st, @v, 1); end;
+procedure writeIntBE (st: TStream; v: ShortInt); overload; begin writeIntegerBE(st, @v, 1); end;
+procedure writeIntBE (st: TStream; v: Word); overload; begin writeIntegerBE(st, @v, 2); end;
+procedure writeIntBE (st: TStream; v: SmallInt); overload; begin writeIntegerBE(st, @v, 2); end;
+procedure writeIntBE (st: TStream; v: LongWord); overload; begin writeIntegerBE(st, @v, 4); end;
+procedure writeIntBE (st: TStream; v: LongInt); overload; begin writeIntegerBE(st, @v, 4); end;
+procedure writeIntBE (st: TStream; v: Int64); overload; begin writeIntegerBE(st, @v, 8); end;
+procedure writeIntBE (st: TStream; v: UInt64); overload; begin writeIntegerBE(st, @v, 8); end;
+
+
+procedure readIntegerLE (st: TStream; vp: Pointer; size: Integer);
+{$IFDEF ENDIAN_LITTLE}
+begin
+ st.readBuffer(vp^, size);
+end;
+{$ELSE}
+var
+ p: PByte;
+begin
+ p := PByte(vp)+size-1;
+ while size > 0 do
+ begin
+ st.readBuffer(p^, 1);
+ Dec(size);
+ Dec(p);
+ end;
+end;
+{$ENDIF}
+
+procedure readIntegerBE (st: TStream; vp: Pointer; size: Integer);
+{$IFDEF ENDIAN_LITTLE}
+var
+ p: PByte;
+begin
+ p := PByte(vp)+size-1;
+ while size > 0 do
+ begin
+ st.readBuffer(p^, 1);
+ Dec(size);
+ Dec(p);
+ end;
+end;
+{$ELSE}
+begin
+ st.readBuffer(vp^, size);
+end;
+{$ENDIF}
+
+function readByte (st: TStream): Byte; begin readIntegerLE(st, @result, 1); end;
+function readShortInt (st: TStream): ShortInt; begin readIntegerLE(st, @result, 1); end;
+function readWord (st: TStream): Word; begin readIntegerLE(st, @result, 2); end;
+function readSmallInt (st: TStream): SmallInt; begin readIntegerLE(st, @result, 2); end;
+function readLongWord (st: TStream): LongWord; begin readIntegerLE(st, @result, 4); end;
+function readLongInt (st: TStream): LongInt; begin readIntegerLE(st, @result, 4); end;
+function readInt64 (st: TStream): Int64; begin readIntegerLE(st, @result, 8); end;
+function readUInt64 (st: TStream): UInt64; begin readIntegerLE(st, @result, 8); end;
+
+function readByteBE (st: TStream): Byte; begin readIntegerBE(st, @result, 1); end;
+function readShortIntBE (st: TStream): ShortInt; begin readIntegerBE(st, @result, 1); end;
+function readWordBE (st: TStream): Word; begin readIntegerBE(st, @result, 2); end;
+function readSmallIntBE (st: TStream): SmallInt; begin readIntegerBE(st, @result, 2); end;
+function readLongWordBE (st: TStream): LongWord; begin readIntegerBE(st, @result, 4); end;
+function readLongIntBE (st: TStream): LongInt; begin readIntegerBE(st, @result, 4); end;
+function readInt64BE (st: TStream): Int64; begin readIntegerBE(st, @result, 8); end;
+function readUInt64BE (st: TStream): UInt64; begin readIntegerBE(st, @result, 8); end;
+
+
end.