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 /* MIN,MAX macros */
  30 #ifndef MIN
  31 #define MIN(a,b) (((a) < (b))?(a):(b))
  32 #endif
  33 #ifndef MAX
  34 #define MAX(a,b) (((a) > (b))?(a):(b))
  35 #endif
  36
  37 /* for systems that do not support ENOTSUP
  38  * win32 being one of them */
  39 #ifndef ENOTSUP
  40 #define ENOTSUP 134             /* Not supported */
  41 #endif
  42
  43 #ifndef HAVE_SYS_TIME_H
  44
  45 #ifndef _TIMEVAL_DEFINED
  46 #define _TIMEVAL_DEFINED
  47
  48 struct timeval {
  49         long tv_sec;
  50         long tv_usec;
  51 };
  52
  53 #endif /* _TIMEVAL_DEFINED */
  54
  55 #endif
  56
  57 /* gettimeofday() */
  58 #ifndef HAVE_GETTIMEOFDAY
  59
  60 #ifdef _WIN32
  61 struct timezone {
  62         int tz_minuteswest;
  63         int tz_dsttime;
  64 };
  65 #endif
  66 struct timezone;
  67
  68 extern int gettimeofday(struct timeval *tv, struct timezone *tz);
  69 #endif
  70
  71 #ifndef IN_REPLACEMENTS_C
  72 /**** clear_malloc & fill_malloc ****/
  73 void *clear_malloc(size_t size);
  74 void *fill_malloc(size_t size);
  75 #endif
  76
  77 /*
  78  * Now you have 3 ways for the malloc function:
  79  *
  80  * 1. Do not change anything, use the original malloc
  81  *
  82  * 2. Use the clear_malloc function instead of the original malloc.
  83  *    In this case you must use the following define:
  84  *    #define malloc((_a)) clear_malloc((_a))
  85  *
  86  * 3. Use the fill_malloc function instead of the original malloc.
  87  *    In this case you must use the following define:
  88  *    #define malloc((_a)) fill_malloc((_a))
  89  *
  90  * We have figured out that there could exist some malloc problems
  91  * where variables are using without to be initialise. To find this
  92  * places, use the fill_malloc function. With this function we want
  93  * to initialize memory to some known bad state. This is quite easily
  94  * spotted in the debugger and will trap to an invalid address.
  95  *
  96  * clear_malloc can be used if you want to set not initialise
  97  * variable to 0.
  98  *
  99  * If you do not want to change the malloc function, to not use one of
 100  * the following macros. Which is the default way.
 101  */
 102
 103 /* #define malloc(_a) clear_malloc(_a) */
 104 /* #define malloc(_a) fill_malloc(_a) */
 105
 106 /* GNU extensions to the C library that may be missing on some systems */
 107 #ifndef HAVE_STRNDUP
 108 extern char* strndup(const char *s, size_t n);
 109 #endif /* HAVE_STRNDUP */
 110
 111 #ifndef HAVE_STRNLEN
 112 extern size_t strnlen(const char *s, size_t maxlen);
 113 #endif /* HAVE_STRNLEN */
 114
 115 #ifndef HAVE_USLEEP
 116 #ifdef _WIN32
 117 static __inline unsigned usleep(unsigned int usecs)
 118 {
 119         Sleep((usecs/1000));
 120         return 0;
 121 }
 122 #else
 123 #if BUILD_ECOSBOARD
 124 void usleep(int us);
 125 #else
 126 #error no usleep defined for your platform
 127 #endif
 128 #endif
 129 #endif /* HAVE_USLEEP */
 130
 131 /* Windows specific */
 132 #ifdef _WIN32
 133
 134 #define WIN32_LEAN_AND_MEAN
 135 #include <windows.h>
 136 #include <time.h>
 137
 138 /* win32 systems do not support ETIMEDOUT */
 139
 140 #ifndef ETIMEDOUT
 141 #define ETIMEDOUT WSAETIMEDOUT
 142 #endif
 143
 144 #if IS_MINGW == 1
 145 static __inline unsigned char inb(unsigned short int port)
 146 {
 147         unsigned char _v;
 148         __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (port));
 149         return _v;
 150 }
 151
 152 static __inline void outb(unsigned char value, unsigned short int port)
 153 {
 154         __asm__ __volatile__ ("outb %b0,%w1": :"a" (value), "Nd" (port));
 155 }
 156
 157 #endif /* IS_MINGW */
 158
 159 int win_select(int max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv);
 160
 161 #endif  /* _WIN32 */
 162
 163 /* generic socket functions for Windows and Posix */
 164 static __inline int write_socket(int handle, const void *buffer, unsigned int count)
 165 {
 166 #ifdef _WIN32
 167         return send(handle, buffer, count, 0);
 168 #else
 169         return write(handle, buffer, count);
 170 #endif
 171 }
 172
 173 static __inline int read_socket(int handle, void *buffer, unsigned int count)
 174 {
 175 #ifdef _WIN32
 176         return recv(handle, buffer, count, 0);
 177 #else
 178         return read(handle, buffer, count);
 179 #endif
 180 }
 181
 182 static __inline int close_socket(int sock)
 183 {
 184 #ifdef _WIN32
 185         return closesocket(sock);
 186 #else
 187         return close(sock);
 188 #endif
 189 }
 190
 191 static __inline void socket_nonblock(int fd)
 192 {
 193 #ifdef _WIN32
 194         unsigned long nonblock = 1;
 195         ioctlsocket(fd, FIONBIO, &nonblock);
 196 #else
 197         int oldopts = fcntl(fd, F_GETFL, 0);
 198         fcntl(fd, F_SETFL, oldopts | O_NONBLOCK);
 199 #endif
 200 }
 201
 202 static __inline int socket_select(int max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv)
 203 {
 204 #ifdef _WIN32
 205         return win_select(max_fd, rfds, wfds, efds, tv);
 206 #else
 207         return select(max_fd, rfds, wfds, efds, tv);
 208 #endif
 209 }
 210
 211 #ifndef HAVE_ELF_H
 212
 213 typedef uint32_t        Elf32_Addr;
 214 typedef uint16_t        Elf32_Half;
 215 typedef uint32_t        Elf32_Off;
 216 typedef int32_t         Elf32_Sword;
 217 typedef uint32_t        Elf32_Word;
 218 typedef uint32_t        Elf32_Size;
 219 typedef Elf32_Off       Elf32_Hashelt;
 220
 221 typedef struct
 222 {
 223         unsigned char   e_ident[16];    /* Magic number and other info */
 224         Elf32_Half      e_type;                 /* Object file type */
 225         Elf32_Half      e_machine;              /* Architecture */
 226         Elf32_Word      e_version;              /* Object file version */
 227         Elf32_Addr      e_entry;                /* Entry point virtual address */
 228         Elf32_Off       e_phoff;                /* Program header table file offset */
 229         Elf32_Off       e_shoff;                /* Section header table file offset */
 230         Elf32_Word      e_flags;                /* Processor-specific flags */
 231         Elf32_Half      e_ehsize;               /* ELF header size in bytes */
 232         Elf32_Half      e_phentsize;    /* Program header table entry size */
 233         Elf32_Half      e_phnum;                /* Program header table entry count */
 234         Elf32_Half      e_shentsize;    /* Section header table entry size */
 235         Elf32_Half      e_shnum;                /* Section header table entry count */
 236         Elf32_Half      e_shstrndx;             /* Section header string table index */
 237 } Elf32_Ehdr;
 238
 239 #define ELFMAG          "\177ELF"
 240 #define SELFMAG         4
 241
 242 #define EI_CLASS        4               /* File class byte index */
 243 #define ELFCLASS32      1               /* 32-bit objects */
 244 #define ELFCLASS64      2               /* 64-bit objects */
 245
 246 #define EI_DATA         5               /* Data encoding byte index */
 247 #define ELFDATA2LSB     1               /* 2's complement, little endian */
 248 #define ELFDATA2MSB     2               /* 2's complement, big endian */
 249
 250 typedef struct
 251 {
 252         Elf32_Word p_type;              /* Segment type */
 253         Elf32_Off p_offset;             /* Segment file offset */
 254         Elf32_Addr p_vaddr;             /* Segment virtual address */
 255         Elf32_Addr p_paddr;             /* Segment physical address */
 256         Elf32_Size p_filesz;    /* Segment size in file */
 257         Elf32_Size p_memsz;             /* Segment size in memory */
 258         Elf32_Word p_flags;             /* Segment flags */
 259         Elf32_Size p_align;             /* Segment alignment */
 260 } Elf32_Phdr;
 261
 262 #define PT_LOAD         1               /* Loadable program segment */
 263
 264 #endif /* HAVE_ELF_H */
 265
 266 #endif /* REPLACEMENTS_H */