archive.hh

   1 #ifndef __ARCHIVE_HH
   2 #define __ARCHIVE_HH
   3
   4 /**
   5  *
   6  * Tennix Archive File Format
   7  * Copyright (C) 2009-2010 Thomas Perl <thp@thpinfo.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  22  * MA  02110-1301, USA.
  23  *
  24  **/
  25
  26 #include <stdio.h>
  27 #include <stdint.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #define TENNIX_ARCHIVE_HEADER "thpinfo.com/2009/tennix/afmt "
  32 #define TENNIX_ARCHIVE_HEADER_LEN 30
  33
  34 #define TENNIX_ARCHIVE_VERSIONMAJOR 1
  35 #define TENNIX_ARCHIVE_VERSIONMINOR 0
  36
  37 #define TENNIX_ARCHIVE_ITEM_MAXNAME 86
  38
  39
  40 /* architecture-independent (in-file) structs */
  41
  42 struct _TennixArchiveItem {
  43     char filename[TENNIX_ARCHIVE_ITEM_MAXNAME];
  44     uint32_t offset; /* network byte order */
  45     uint32_t length; /* network byte order */
  46     uint8_t key;
  47 };
  48
  49 typedef struct _TennixArchiveItem TennixArchiveItem;
  50
  51 struct _TennixArchiveHeader {
  52     char header[TENNIX_ARCHIVE_HEADER_LEN];
  53     uint8_t versionmajor; /* major file version */
  54     uint8_t versionminor; /* minor file version */
  55     uint8_t key;
  56     uint8_t items; /* maximum 255 files per archive */
  57 };
  58
  59 typedef struct _TennixArchiveHeader TennixArchiveHeader;
  60
  61
  62 class TennixArchive {
  63     private:
  64         FILE* fp;
  65         TennixArchiveHeader header;
  66         TennixArchiveItem* items;
  67         char** blobs;
  68         size_t offset;
  69         int current_item;
  70         int building;
  71
  72         static void xormem(char* mem, uint32_t length, char key);
  73
  74     public:
  75         TennixArchive() {
  76             strcpy(header.header, TENNIX_ARCHIVE_HEADER);
  77             header.items = 0;
  78             building = 1;
  79             fp = NULL;
  80         }
  81
  82         TennixArchive(const char* filename);
  83
  84         ~TennixArchive() {
  85             if (fp != NULL) {
  86                 fclose(fp);
  87             }
  88             free(items);
  89         }
  90
  91         int setItemFilename(const char* filename);
  92
  93         const char* getItemFilename() {
  94             return items[current_item].filename;
  95         }
  96
  97         char* getItemBytes();
  98
  99         size_t getItemSize() {
 100             return items[current_item].length;
 101         }
 102
 103         int endOfFile() {
 104             return current_item >= header.items;
 105         }
 106
 107         void next() {
 108             current_item++;
 109         }
 110
 111         /* only for building/utility mode: */
 112         void appendItem(char* filename, char* data, uint32_t length);
 113         void buildFile(char* filename);
 114         void dump();
 115 };
 116
 117 #endif