memdisk/memdisk.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2001-2008 H. Peter Anvin - All Rights Reserved
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
   8  *   Boston MA 02111-1307, USA; either version 2 of the License, or
   9  *   (at your option) any later version; incorporated herein by reference.
  10  *
  11  * ----------------------------------------------------------------------- */
  12
  13 /*
  14  * memdisk.h
  15  *
  16  * Miscellaneous header definitions
  17  */
  18
  19 #ifndef MEMDISK_H
  20 #define MEMDISK_H
  21
  22 /* We use the com32 interface for calling 16-bit code */
  23 #include <com32.h>
  24
  25 /* The real-mode segment */
  26 #define LOW_SEG 0x0800
  27
  28 typedef void (*syscall_t)(uint8_t, com32sys_t *, com32sys_t *);
  29 extern syscall_t syscall;
  30 extern void *sys_bounce;
  31
  32 /* What to call when we're dead */
  33 extern void __attribute__((noreturn)) die(void);
  34
  35 /* Standard routines */
  36 #define memcpy(a,b,c) __builtin_memcpy(a,b,c)
  37 #define memset(a,b,c) __builtin_memset(a,b,c)
  38 #define strcpy(a,b)   __builtin_strcpy(a,b)
  39 #define strlen(a)     __builtin_strlen(a)
  40
  41 /* memcpy() but returns a pointer to end of buffer */
  42 static inline void *
  43 memcpy_endptr(void *__d, const void *__s, unsigned int __n)
  44 {
  45   memcpy(__d, __s, __n);
  46   return (void *)((char *)__d + __n);
  47 }
  48
  49 /* memcmp() */
  50 static inline int
  51 memcmp(const void *__a, const void *__b, unsigned int __n)
  52 {
  53   const unsigned char *__aa = __a;
  54   const unsigned char *__bb = __b;
  55   int __d;
  56
  57   while ( __n-- ) {
  58     __d = *__bb++ - *__aa++;
  59     if ( __d )
  60       return __d;
  61   }
  62
  63   return 0;
  64 }
  65
  66 /* Decompression */
  67 extern int check_zip(void *indata, uint32_t size, uint32_t *zbytes_p,
  68                      uint32_t *dbytes_p, uint32_t *orig_crc,
  69                      uint32_t *offset_p);
  70 extern void *unzip(void *indata, uint32_t zbytes, uint32_t dbytes,
  71                    uint32_t orig_crc, void *target);
  72
  73 #endif