Read bytes from the current file. buf contain buffer where data must be copied len the size of buf. return the number of byte copied if somes bytes are copied return 0 if the end of file was reached return <0 with error code if there is an error (UNZ_ERRNO for IO error, or zLib error for uncompress error)
| 3675 | // return <0 with error code if there is an error |
| 3676 | // (UNZ_ERRNO for IO error, or zLib error for uncompress error) |
| 3677 | int unzReadCurrentFile (unzFile file, voidp buf, unsigned len) |
| 3678 | { int err=UNZ_OK; |
| 3679 | uInt iRead = 0; |
| 3680 | |
| 3681 | unz_s *s = (unz_s*)file; |
| 3682 | if (s==NULL) return UNZ_PARAMERROR; |
| 3683 | |
| 3684 | file_in_zip_read_info_s* pfile_in_zip_read_info = s->pfile_in_zip_read; |
| 3685 | if (pfile_in_zip_read_info==NULL) return UNZ_PARAMERROR; |
| 3686 | if ((pfile_in_zip_read_info->read_buffer == NULL)) return UNZ_END_OF_LIST_OF_FILE; |
| 3687 | if (len==0) return 0; |
| 3688 | |
| 3689 | pfile_in_zip_read_info->stream.next_out = (Byte*)buf; |
| 3690 | pfile_in_zip_read_info->stream.avail_out = (uInt)len; |
| 3691 | |
| 3692 | if (len>pfile_in_zip_read_info->rest_read_uncompressed) |
| 3693 | { pfile_in_zip_read_info->stream.avail_out = (uInt)pfile_in_zip_read_info->rest_read_uncompressed; |
| 3694 | } |
| 3695 | |
| 3696 | while (pfile_in_zip_read_info->stream.avail_out>0) |
| 3697 | { if ((pfile_in_zip_read_info->stream.avail_in==0) && (pfile_in_zip_read_info->rest_read_compressed>0)) |
| 3698 | { uInt uReadThis = UNZ_BUFSIZE; |
| 3699 | if (pfile_in_zip_read_info->rest_read_compressed<uReadThis) uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed; |
| 3700 | if (uReadThis == 0) return UNZ_EOF; |
| 3701 | if (lufseek(pfile_in_zip_read_info->file, pfile_in_zip_read_info->pos_in_zipfile + pfile_in_zip_read_info->byte_before_the_zipfile,SEEK_SET)!=0) return UNZ_ERRNO; |
| 3702 | if (lufread(pfile_in_zip_read_info->read_buffer,uReadThis,1,pfile_in_zip_read_info->file)!=1) return UNZ_ERRNO; |
| 3703 | pfile_in_zip_read_info->pos_in_zipfile += uReadThis; |
| 3704 | pfile_in_zip_read_info->rest_read_compressed-=uReadThis; |
| 3705 | pfile_in_zip_read_info->stream.next_in = (Byte*)pfile_in_zip_read_info->read_buffer; |
| 3706 | pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis; |
| 3707 | } |
| 3708 | |
| 3709 | if (pfile_in_zip_read_info->compression_method==0) |
| 3710 | { uInt uDoCopy,i ; |
| 3711 | if (pfile_in_zip_read_info->stream.avail_out < pfile_in_zip_read_info->stream.avail_in) |
| 3712 | { uDoCopy = pfile_in_zip_read_info->stream.avail_out ; |
| 3713 | } |
| 3714 | else |
| 3715 | { uDoCopy = pfile_in_zip_read_info->stream.avail_in ; |
| 3716 | } |
| 3717 | for (i=0;i<uDoCopy;i++) |
| 3718 | { *(pfile_in_zip_read_info->stream.next_out+i) = *(pfile_in_zip_read_info->stream.next_in+i); |
| 3719 | } |
| 3720 | pfile_in_zip_read_info->crc32 = ucrc32(pfile_in_zip_read_info->crc32,pfile_in_zip_read_info->stream.next_out,uDoCopy); |
| 3721 | pfile_in_zip_read_info->rest_read_uncompressed-=uDoCopy; |
| 3722 | pfile_in_zip_read_info->stream.avail_in -= uDoCopy; |
| 3723 | pfile_in_zip_read_info->stream.avail_out -= uDoCopy; |
| 3724 | pfile_in_zip_read_info->stream.next_out += uDoCopy; |
| 3725 | pfile_in_zip_read_info->stream.next_in += uDoCopy; |
| 3726 | pfile_in_zip_read_info->stream.total_out += uDoCopy; |
| 3727 | iRead += uDoCopy; |
| 3728 | } |
| 3729 | else |
| 3730 | { uLong uTotalOutBefore,uTotalOutAfter; |
| 3731 | const Byte *bufBefore; |
| 3732 | uLong uOutThis; |
| 3733 | int flush=Z_SYNC_FLUSH; |
| 3734 | uTotalOutBefore = pfile_in_zip_read_info->stream.total_out; |