src/helper/replacements.h

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  25  ***************************************************************************/
  26 #ifndef REPLACEMENTS_H
  27 #define REPLACEMENTS_H
  28
  29 #include "types.h"
  30
  31 /* MIN,MAX macros */
  32 #ifndef MIN
  33 #define MIN(a,b) (((a)<(b))?(a):(b))
  34 #endif
  35 #ifndef MAX
  36 #define MAX(a,b) (((a)>(b))?(a):(b))
  37 #endif
  38
  39 /* for systems that do not support ENOTSUP
  40  * win32 being one of them */
  41 #ifndef ENOTSUP
  42 #define ENOTSUP 134             /* Not supported */
  43 #endif
  44
  45 #ifndef HAVE_SYS_TIME_H
  46
  47 #ifndef _TIMEVAL_DEFINED
  48 #define _TIMEVAL_DEFINED
  49
  50 struct timeval {
  51         long tv_sec;
  52         long tv_usec;
  53 };
  54
  55 #endif /* _TIMEVAL_DEFINED */
  56
  57 #endif
  58
  59 /* gettimeofday() */
  60 #ifndef HAVE_GETTIMEOFDAY
  61
  62 #ifdef _WIN32
  63 struct timezone {
  64         int tz_minuteswest;
  65         int tz_dsttime;
  66 };
  67 #endif
  68 struct timezone;
  69
  70 extern int gettimeofday(struct timeval *tv, struct timezone *tz);
  71 #endif
  72
  73 #ifndef IN_REPLACEMENTS_C
  74 /**** clear_malloc & fill_malloc ****/
  75 void *clear_malloc(size_t size);
  76 void *fill_malloc(size_t size);
  77 #endif
  78
  79 /*
  80  * Now you have 3 ways for the malloc function:
  81  *
  82  * 1. Do not change anything, use the original malloc
  83  *
  84  * 2. Use the clear_malloc function instead of the original malloc.
  85  *    In this case you must use the following define:
  86  *    #define malloc((_a)) clear_malloc((_a))
  87  *
  88  * 3. Use the fill_malloc function instead of the original malloc.
  89  *    In this case you must use the following define:
  90  *    #define malloc((_a)) fill_malloc((_a))
  91  *
  92  * We have figured out that there could exist some malloc problems
  93  * where variables are using without to be initialise. To find this
  94  * places, use the fill_malloc function. With this function we want
  95  * to initialize memory to some known bad state. This is quite easily
  96  * spotted in the debugger and will trap to an invalid address.
  97  *
  98  * clear_malloc can be used if you want to set not initialise
  99  * variable to 0.
 100  *
 101  * If you do not want to change the malloc function, to not use one of
 102  * the following macros. Which is the default way.
 103  */
 104
 105 /* #define malloc(_a) clear_malloc(_a) */
 106 /* #define malloc(_a) fill_malloc(_a) */
 107
 108 /* GNU extensions to the C library that may be missing on some systems */
 109 #ifndef HAVE_STRNDUP
 110 extern char* strndup(const char *s, size_t n);
 111 #endif /* HAVE_STRNDUP */
 112
 113 #ifndef HAVE_STRNLEN
 114 extern size_t strnlen(const char *s, size_t maxlen);
 115 #endif /* HAVE_STRNLEN */
 116
 117 #ifndef HAVE_USLEEP
 118 #ifdef _WIN32
 119 static __inline unsigned usleep(unsigned int usecs)
 120 {
 121         Sleep((usecs/1000));
 122         return 0;
 123 }
 124 #else
 125 #if BUILD_ECOSBOARD
 126 void usleep(int us);
 127 #else
 128 #error no usleep defined for your platform
 129 #endif
 130 #endif
 131 #endif /* HAVE_USLEEP */
 132
 133 /* Windows specific */
 134 #ifdef _WIN32
 135
 136 #define WIN32_LEAN_AND_MEAN
 137 #include <windows.h>
 138 #include <time.h>
 139
 140 /* win32 systems do not support ETIMEDOUT */
 141
 142 #ifndef ETIMEDOUT
 143 #define ETIMEDOUT WSAETIMEDOUT
 144 #endif
 145
 146 #if IS_MINGW == 1
 147 static __inline unsigned char inb(unsigned short int port)
 148 {
 149         unsigned char _v;
 150         __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (port));
 151         return _v;
 152 }
 153
 154 static __inline void outb(unsigned char value, unsigned short int port)
 155 {
 156         __asm__ __volatile__ ("outb %b0,%w1": :"a" (value), "Nd" (port));
 157 }
 158
 159 #endif /* IS_MINGW */
 160
 161 int win_select(int max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv);
 162
 163 #endif  /* _WIN32 */
 164
 165 /* generic socket functions for Windows and Posix */
 166 static __inline int write_socket( int handle, const void *buffer, unsigned int count )
 167 {
 168 #ifdef _WIN32
 169         return send(handle, buffer, count, 0);
 170 #else
 171         return write(handle, buffer, count);
 172 #endif
 173 }
 174
 175 static __inline int read_socket( int handle, void *buffer, unsigned int count )
 176 {
 177 #ifdef _WIN32
 178         return recv(handle, buffer, count, 0);
 179 #else
 180         return read(handle, buffer, count);
 181 #endif
 182 }
 183
 184 static __inline int close_socket(int sock)
 185 {
 186 #ifdef _WIN32
 187         return closesocket(sock);
 188 #else
 189         return close(sock);
 190 #endif
 191 }
 192
 193 static __inline void socket_nonblock(int fd)
 194 {
 195 #ifdef _WIN32
 196         unsigned long nonblock = 1;
 197         ioctlsocket(fd, FIONBIO, &nonblock );
 198 #else
 199         int oldopts = fcntl(fd, F_GETFL, 0);
 200         fcntl(fd, F_SETFL, oldopts | O_NONBLOCK);
 201 #endif
 202 }
 203
 204 static __inline int socket_select(int max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv)
 205 {
 206 #ifdef _WIN32
 207         return win_select(max_fd, rfds, wfds, efds, tv);
 208 #else
 209         return select(max_fd, rfds, wfds, efds, tv);
 210 #endif
 211 }
 212
 213 #ifndef HAVE_ELF_H
 214
 215 typedef struct
 216 {
 217         unsigned char   e_ident[16];    /* Magic number and other info */
 218         u16     e_type;                 /* Object file type */
 219         u16     e_machine;              /* Architecture */
 220         u32     e_version;              /* Object file version */
 221         u32 e_entry;            /* Entry point virtual address */
 222         u32 e_phoff;            /* Program header table file offset */
 223         u32     e_shoff;                /* Section header table file offset */
 224         u32     e_flags;                /* Processor-specific flags */
 225         u16     e_ehsize;               /* ELF header size in bytes */
 226         u16     e_phentsize;    /* Program header table entry size */
 227         u16     e_phnum;                /* Program header table entry count */
 228         u16     e_shentsize;    /* Section header table entry size */
 229         u16     e_shnum;                /* Section header table entry count */
 230         u16     e_shstrndx;             /* Section header string table index */
 231 } Elf32_Ehdr;
 232
 233 #define ELFMAG          "\177ELF"
 234 #define SELFMAG         4
 235
 236 #define EI_CLASS        4               /* File class byte index */
 237 #define ELFCLASS32      1               /* 32-bit objects */
 238 #define ELFCLASS64      2               /* 64-bit objects */
 239
 240 #define EI_DATA         5               /* Data encoding byte index */
 241 #define ELFDATA2LSB     1               /* 2's complement, little endian */
 242 #define ELFDATA2MSB     2               /* 2's complement, big endian */
 243
 244 typedef struct
 245 {
 246         u32 p_type;                     /* Segment type */
 247         u32 p_offset;           /* Segment file offset */
 248         u32 p_vaddr;            /* Segment virtual address */
 249         u32 p_paddr;            /* Segment physical address */
 250         u32 p_filesz;           /* Segment size in file */
 251         u32 p_memsz;            /* Segment size in memory */
 252         u32 p_flags;            /* Segment flags */
 253         u32 p_align;            /* Segment alignment */
 254 } Elf32_Phdr;
 255
 256 #define PT_LOAD         1               /* Loadable program segment */
 257
 258 #endif /* HAVE_ELF_H */
 259
 260 #endif /* REPLACEMENTS_H */