/* Copyright (C) 2004 Michael Liebscher 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 2 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, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* * zipfile.c: Write zip file * * Author: Michael Liebscher * */ /* Notes: Reference document: http://www.pkware.com/company/standards/appnote/appnote.txt */ #include #include "../../../common/arch.h" #include "../../../common/common_utils.h" #include "zip.h" /* Signatures for zip file information headers */ #define SIG_LOCAL 0x04034b50L #define SIG_CENTRAL 0x02014b50L #define SIG_END 0x06054b50L #define SIG_EXTENDLOCAL 0x08074b50L #define SIG_EXTENDSPLOCAL 0x30304b50L /* Length of header (not counting the signature) */ #define LOCALHEAD_SIZE 26 #define CENTRALHEAD_SIZE 42 #define ENDHEAD_SIZE 18 /* ----------------------------------------------------------------------------- Function: zip_writelocalfileheader -Write a local header to file. Parameters: z -[in] zip entry to write local header for. f -[in] File to write to. Returns: Notes: ----------------------------------------------------------------------------- */ _boolean zip_writelocalfileheader( struct zlist *z, FILE *f ) { W32 temp32; W16 temp16; W32 retval; temp32 = LittleLong( SIG_LOCAL ); retval = fwrite( &temp32, 1, 4, f ); temp16 = LittleShort( z->versionneeded ); retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( z->localflag ); retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( z->compression_method ); retval += fwrite( &temp16, 1, 2, f ); temp32 = LittleLong( z->timedate ); retval += fwrite( &temp32, 1, 4, f ); temp32 = LittleLong( z->crc32 ); retval += fwrite( &temp32, 1, 4, f ); temp32 = LittleLong( z->compressed_size ); retval += fwrite( &temp32, 1, 4, f ); temp32 = LittleLong( z->uncompressed_size ); retval += fwrite( &temp32, 1, 4, f ); temp16 = LittleShort( z->filename_length ); retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( z->extrafield_length ); retval += fwrite( &temp16, 1, 2, f ); if( retval != LOCALHEAD_SIZE + 4 ) { return false; } if( fwrite( z->filename, 1, z->filename_length, f ) != z->filename_length || (z->extrafield && fwrite( z->extrafield, 1, z->extrafield_length, f) != z->extrafield_length) ) { return false; } return true; } /* ----------------------------------------------------------------------------- Function: zip_writecentral -Write a central header to file. Parameters: z -[in] zip entry to write central header for. f -[in] File to write to. Returns: Notes: ----------------------------------------------------------------------------- */ _boolean zip_writecentral( struct zlist *z, FILE *f ) { W32 temp32; W16 temp16; W32 retval; temp32 = LittleLong( SIG_CENTRAL ); retval = fwrite( &temp32, 1, 4, f ); temp16 = LittleShort( z->versionmadeby ); retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( z->versionneeded ); retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( z->flag ); retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( z->compression_method ); retval += fwrite( &temp16, 1, 2, f ); temp32 = LittleLong( z->timedate ); retval += fwrite( &temp32, 1, 4, f ); temp32 = LittleLong( z->crc32 ); retval += fwrite( &temp32, 1, 4, f ); temp32 = LittleLong( z->compressed_size ); retval += fwrite( &temp32, 1, 4, f ); temp32 = LittleLong( z->uncompressed_size ); retval += fwrite( &temp32, 1, 4, f ); temp16 = LittleShort( z->filename_length ); retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( z->centralextra_length ); retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( z->comment_length ); retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( z->disknumstart ); retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( z->internalattribute ); retval += fwrite( &temp16, 1, 2, f ); temp32 = LittleLong( z->externalattribute ); retval += fwrite( &temp32, 1, 4, f ); temp32 = LittleLong( z->offset ); retval += fwrite( &temp32, 1, 4, f ); if( retval != CENTRALHEAD_SIZE + 4 ) { return false; } if( fwrite(z->filename, 1, z->filename_length, f) != z->filename_length || (z->centralextra_length && fwrite(z->centralextra, 1, z->centralextra_length, f) != z->centralextra_length) || (z->comment_length && fwrite(z->comment, 1, z->comment_length, f) != z->comment_length) ) { return false; } return true; } /* ----------------------------------------------------------------------------- Function: zip_writeend -Write end of central directory data to file. Parameters: num -[in] Number of entries in central directory. size -[in] Size of central directory. offset -[in] Offset of central directory. len -[in] Length of zip file comment (0 if none). comment -[in] Zip file comment if len != 0. f -[in] File to write to. Returns: Notes: ----------------------------------------------------------------------------- */ _boolean zip_writeend( SW32 num, W32 size, W32 offset, W16 len, char *comment, FILE *f ) { W32 temp32; W16 temp16; W32 retval; temp32 = LittleLong( SIG_END ); retval = fwrite( &temp32, 1, 4, f ); temp16 = 0; retval += fwrite( &temp16, 1, 2, f ); temp16 = 0; retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( num ); retval += fwrite( &temp16, 1, 2, f ); temp16 = LittleShort( num ); retval += fwrite( &temp16, 1, 2, f ); temp32 = LittleLong( size ); retval += fwrite( &temp32, 1, 4, f ); temp32 = LittleLong( offset ); retval += fwrite( &temp32, 1, 4, f ); temp16 = LittleShort( len ); retval += fwrite( &temp16, 1, 2, f ); if( retval != ENDHEAD_SIZE + 4 ) { return false; } if( len && fwrite( comment, 1, len, f ) != len ) { return false; } return true; }