double STREAMSeek(STREAM *S, double offset, int whence)
{
double pos;
int wherefrom;
if (S->OutEnd > 0) STREAMFlush(S);
if (whence==SEEK_CUR)
{
pos=STREAMTell(S);
pos+=offset;
wherefrom=SEEK_SET;
}
else
{
pos=offset;
wherefrom=whence;
}
S->InStart=0;
S->InEnd=0;
#ifdef _LARGEFILE64_SOURCE
pos=(double) lseek64(S->in_fd,(off64_t) pos, wherefrom);
#else
pos=(double) lseek(S->in_fd,(off_t) pos, wherefrom);
#endif
return(pos);
}
void STREAMResetInputBuffers(STREAM *S)
{
double pos;
pos=STREAMTell(S);
S->InStart=0;
S->InEnd=0;
STREAMSeek(S,pos,SEEK_SET);
}
int MultipartReadFile(STREAM *S,char *FName,char *Boundary, int BoundaryLen)
{
char *Tempstr=NULL, *ptr;
int result, RetVal=FALSE;
STREAM *FOut=NULL;
off_t fsize;
FOut=STREAMOpenFile(FName,SF_CREAT | SF_TRUNC | SF_WRONLY);
if (FOut)
{
Tempstr=SetStrLen(Tempstr,4096);
result=STREAMReadBytesToTerm(S, Tempstr, 4096, '\n');
while (result > -1)
{
if ( (result < (BoundaryLen + 6)) && (strncmp(Tempstr,Boundary,BoundaryLen)==0))
{
//As we read to a '\n' we may have left its '\r' partner attached to
//the end of the data
ptr=Tempstr+result-2;
if (strcmp(ptr,"\r\n")==0) result-=2;
if ((result >= BoundaryLen) && (strncmp(Tempstr+BoundaryLen,"--\r\n",4)==0))
{
//must remove '\r\n' from end of file (it's the start of the boundary)
RetVal=UPLOAD_DONE;
}
break;
}
else if (FOut) STREAMWriteBytes(FOut,Tempstr,result);
result=STREAMReadBytesToTerm(S, Tempstr, 4096, '\n');
}
//If we read to a boundary then there will always be a \r\n on the end of the file,
fsize=(off_t) STREAMTell(FOut);
if (fsize > 0) ftruncate(FOut->out_fd,fsize-2);
STREAMClose(FOut);
}
if (result==-1) RetVal=UPLOAD_DONE;
DestroyString(Tempstr);
return(RetVal);
}
int STREAMCheckForBytes(STREAM *S)
{
off_t pos;
struct stat Stat;
if (! S) return(FALSE);
if (S->State & SS_EMBARGOED) return(FALSE);
if (S->InEnd > S->InStart) return(TRUE);
if (S->in_fd==-1) return(FALSE);
if (S->Flags & SF_FOLLOW)
{
while (1)
{
pos=STREAMTell(S);
fstat(S->in_fd,&Stat);
if (Stat.st_size > pos) return(TRUE);
}
}
return(FDCheckForBytes(S->in_fd));
}
