include/pack.h

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   4
   5     This program is free software: you can redistribute it and/or modify
   6     it under the terms of the GNU Lesser General Public License as published by
   7     the Free Software Foundation, either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU Lesser General Public License for more details.
  14
  15     You should have received a copy of the GNU Lesser General Public License
  16     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #ifndef _PACK_H_
  20 #define _PACK_H_
  21
  22 #include <stdint.h>
  23 #include <malloc.h>
  24
  25 typedef struct pack_S {
  26   void* cur;
  27   void* buf;
  28 }* pack_t;
  29
  30 #define pack_destroy(pack) free(pack)
  31 #define pack_sizeof(pack)  ((pack)->cur-(pack)->buf)
  32 #define pack_malloc(size)  pack_create(malloc(size))
  33 #define pack_free(pack)    do { free(pack->buf); pack_destroy(pack); } while(0)
  34 #define pack_data(pack)    ((pack)->buf)
  35 #define pack_reset(pack)   ((pack)->cur = (pack)->buf)
  36
  37 pack_t pack_create(void *buf);
  38
  39 // Pack
  40
  41 #define packg(pack,type,val) do { *((type*)((pack)->cur)) = (type)(val); (pack)->cur += sizeof(type); } while(0)
  42 #define pack8(pack,val)      packg(pack,uint8_t,val)
  43 #define pack16(pack,val)     packg(pack,uint16_t,val)
  44 #define pack32(pack,val)     packg(pack,uint32_t,val)
  45 #define pack64(pack,val)     packg(pack,uint64_t,val)
  46 #define packc(pack,val)      packg(pack,char,val)
  47 #define packs(pack,val)      packg(pack,short,val)
  48 #define packi(pack,val)      packg(pack,int,val)
  49 #define packl(pack,val)      packg(pack,long,val)
  50 #define packobj(pack,obj)    packdata(pack,&(obj),sizeof(obj))
  51
  52 void packstr(pack_t pack,const char *str);
  53 void packnstr(pack_t pack,const char *str,size_t maxlen);
  54 void packdata(pack_t pack,void *data,size_t size);
  55
  56 // Unpack
  57
  58 #define unpackg(pack,type,val) do { *(val) = *((type*)((pack)->cur)); (pack)->cur += sizeof(type); } while(0)
  59 #define unpack8(pack,val)      unpackg(pack,uint8_t,val)
  60 #define unpack16(pack,val)     unpackg(pack,uint16_t,val)
  61 #define unpack32(pack,val)     unpackg(pack,uint32_t,val)
  62 #define unpack64(pack,val)     unpackg(pack,uint64_t,val)
  63 #define unpackc(pack,val)      unpackg(pack,char,val)
  64 #define unpacks(pack,val)      unpackg(pack,short,val)
  65 #define unpacki(pack,val)      unpackg(pack,int,val)
  66 #define unpackl(pack,val)      unpackg(pack,long,val)
  67 #define unpackobj(pack,obj)    unpackdata(pack,&(obj));
  68
  69 void unpackstr(pack_t pack,char **str);
  70 void unpackdata(pack_t pack,void *data);
  71
  72 #endif