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#include "rar.hpp"
static bool IsUnicode(byte *Data,int Size);
bool ReadTextFile(
const wchar *Name,
StringList *List,
bool Config,
bool AbortOnError,
RAR_CHARSET SrcCharset,
bool Unquote,
bool SkipComments,
bool ExpandEnvStr)
{
wchar FileName[NM];
*FileName=0;
if (Name!=NULL)
if (Config)
GetConfigName(Name,FileName,ASIZE(FileName),true,false);
else
wcsncpyz(FileName,Name,ASIZE(FileName));
File SrcFile;
if (*FileName!=0)
{
bool OpenCode=AbortOnError ? SrcFile.WOpen(FileName):SrcFile.Open(FileName,0);
if (!OpenCode)
{
if (AbortOnError)
ErrHandler.Exit(RARX_OPEN);
return false;
}
}
else
SrcFile.SetHandleType(FILE_HANDLESTD);
unsigned int DataSize=0,ReadSize;
const int ReadBlock=4096;
// Our algorithm below needs at least two trailing zeroes after data.
// So for Unicode we provide 2 Unicode zeroes and one more byte
// in case read Unicode data contains uneven number of bytes.
const size_t ZeroPadding=5;
Array<char> Data(ReadBlock+ZeroPadding);
while ((ReadSize=SrcFile.Read(&Data[DataSize],ReadBlock))!=0)
{
DataSize+=ReadSize;
Data.Add(ReadSize); // Always have ReadBlock available for next data.
}
memset(&Data[DataSize],0,ZeroPadding); // Provide at least 2 Unicode zero bytes.
Array<wchar> WideStr;
if (SrcCharset==RCH_UNICODE ||
SrcCharset==RCH_DEFAULT && IsUnicode((byte *)&Data[0],DataSize))
{
// Unicode in native system format, can be more than 2 bytes per character.
Array<wchar> DataW(Data.Size()/2+1);
for (size_t I=2;I<Data.Size()-1;I+=2)
{
// Need to convert Data to (byte) first to prevent the sign extension
// to higher bytes.
DataW[(I-2)/2]=(wchar)((byte)Data[I])+(wchar)((byte)Data[I+1])*256;
}
wchar *CurStr=&DataW[0];
while (*CurStr!=0)
{
wchar *NextStr=CurStr,*CmtPtr=NULL;
while (*NextStr!='\r' && *NextStr!='\n' && *NextStr!=0)
{
if (SkipComments && NextStr[0]=='/' && NextStr[1]=='/')
{
*NextStr=0;
CmtPtr=NextStr;
}
NextStr++;
}
*NextStr=0;
for (wchar *SpacePtr=(CmtPtr ? CmtPtr:NextStr)-1;SpacePtr>=CurStr;SpacePtr--)
{
if (*SpacePtr!=' ' && *SpacePtr!='\t')
break;
*SpacePtr=0;
}
if (*CurStr!=0)
{
size_t Length=wcslen(CurStr);
if (Unquote && *CurStr=='\"' && CurStr[Length-1]=='\"')
{
CurStr[Length-1]=0;
CurStr++;
}
bool Expanded=false;
#ifdef _WIN_ALL
if (ExpandEnvStr && *CurStr=='%')
{
// Expanding environment variables in Windows version.
wchar ExpName[NM];
*ExpName=0;
DWORD Result=ExpandEnvironmentStrings(CurStr,ExpName,ASIZE(ExpName));
Expanded=Result!=0 && Result<ASIZE(ExpName);
if (Expanded)
List->AddString(ExpName);
}
#endif
if (!Expanded)
List->AddString(CurStr);
}
CurStr=NextStr+1;
while (*CurStr=='\r' || *CurStr=='\n')
CurStr++;
}
}
else
{
char *CurStr=&Data[0];
while (*CurStr!=0)
{
char *NextStr=CurStr,*CmtPtr=NULL;
while (*NextStr!='\r' && *NextStr!='\n' && *NextStr!=0)
{
if (SkipComments && NextStr[0]=='/' && NextStr[1]=='/')
{
*NextStr=0;
CmtPtr=NextStr;
}
NextStr++;
}
*NextStr=0;
for (char *SpacePtr=(CmtPtr ? CmtPtr:NextStr)-1;SpacePtr>=CurStr;SpacePtr--)
{
if (*SpacePtr!=' ' && *SpacePtr!='\t')
break;
*SpacePtr=0;
}
if (*CurStr!=0)
{
if (Unquote && *CurStr=='\"')
{
size_t Length=strlen(CurStr);
if (CurStr[Length-1]=='\"')
{
CurStr[Length-1]=0;
CurStr++;
}
}
#if defined(_WIN_ALL)
if (SrcCharset==RCH_OEM)
OemToCharA(CurStr,CurStr);
#endif
bool Expanded=false;
WideStr.Alloc(strlen(CurStr)+1);
CharToWide(CurStr,&WideStr[0],WideStr.Size());
#ifdef _WIN_ALL
if (ExpandEnvStr && *CurStr=='%')
{
// Expanding environment variables in Windows version.
wchar ExpName[NM];
DWORD Result=ExpandEnvironmentStringsW(&WideStr[0],ExpName,ASIZE(ExpName));
Expanded=Result!=0 && Result<ASIZE(ExpName);
if (Expanded)
List->AddString(ExpName);
}
#endif
if (!Expanded)
List->AddString(&WideStr[0]);
}
CurStr=NextStr+1;
while (*CurStr=='\r' || *CurStr=='\n')
CurStr++;
}
}
return true;
}
bool IsUnicode(byte *Data,int Size)
{
if (Size<4 || Data[0]!=0xff || Data[1]!=0xfe)
return false;
for (int I=2;I<Size;I++)
if (Data[I]<32 && Data[I]!='\r' && Data[I]!='\n')
return true;
return false;
}
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