buffer.h

   1 /*
   2  * Dropbear - a SSH2 server
   3  *
   4  * Copyright (c) 2002,2003 Matt Johnston
   5  * All rights reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE. */
  24
  25 #ifndef _BUFFER_H_
  26
  27 #define _BUFFER_H_
  28
  29 #include "includes.h"
  30
  31 struct buf {
  32
  33         unsigned char * data;
  34         unsigned int len; /* the used size */
  35         unsigned int pos;
  36         unsigned int size; /* the memory size */
  37
  38 };
  39
  40 typedef struct buf buffer;
  41
  42 buffer * buf_new(unsigned int size);
  43 void buf_resize(buffer *buf, unsigned int newsize);
  44 void buf_free(buffer* buf);
  45 void buf_burn(buffer* buf);
  46 buffer* buf_newcopy(buffer* buf);
  47 void buf_setlen(buffer* buf, unsigned int len);
  48 void buf_incrlen(buffer* buf, unsigned int incr);
  49 void buf_setpos(buffer* buf, unsigned int pos);
  50 void buf_incrpos(buffer* buf, int incr); /* -ve is ok, to go backwards */
  51 void buf_incrwritepos(buffer* buf, unsigned int incr);
  52 unsigned char buf_getbyte(buffer* buf);
  53 unsigned char buf_getbool(buffer* buf);
  54 void buf_putbyte(buffer* buf, unsigned char val);
  55 unsigned char* buf_getptr(buffer* buf, unsigned int len);
  56 unsigned char* buf_getwriteptr(buffer* buf, unsigned int len);
  57 unsigned char* buf_getstring(buffer* buf, unsigned int *retlen);
  58 buffer * buf_getstringbuf(buffer *buf);
  59 void buf_eatstring(buffer *buf);
  60 void buf_putint(buffer* buf, unsigned int val);
  61 void buf_putstring(buffer* buf, const unsigned char* str, unsigned int len);
  62 void buf_putbytes(buffer *buf, const unsigned char *bytes, unsigned int len);
  63 void buf_putmpint(buffer* buf, mp_int * mp);
  64 int buf_getmpint(buffer* buf, mp_int* mp);
  65 unsigned int buf_getint(buffer* buf);
  66
  67 #endif /* _BUFFER_H_ */