X-Git-Url: https://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fshared%2Futils.pas;h=712923e93b6c2a2fa2abefe95a1b282f51429ebc;hb=844441154d1220d6c83f75043300c2851ec87109;hp=76edd1fa841914c413dc12404c6d8ed7ab59b88e;hpb=56fe3537337bec115cae2b73922752488ff298a4;p=d2df-sdl.git

diff --git a/src/shared/utils.pas b/src/shared/utils.pas
index 76edd1f..712923e 100644
--- a/src/shared/utils.pas
+++ b/src/shared/utils.pas
@@ -4,39 +4,56 @@ unit utils;
 interface
 
 // 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;
+
+function UpCase1251 (ch: Char): Char;
+
+// `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;
 
 
 implementation
 
 uses
-  SysUtils, sfs;
+  SysUtils;
 
 
-function hasWadExtension (fn: string): Boolean;
+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
@@ -46,7 +63,7 @@ begin
     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;
@@ -57,4 +74,238 @@ begin
 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 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;
+
+
 end.