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
  27 #ifndef REPLACEMENTS_H
  28 #define REPLACEMENTS_H
  29
  30 /* MIN,MAX macros */
  31 #ifndef MIN
  32 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
  33 #endif
  34 #ifndef MAX
  35 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
  36 #endif
  37
  38 /* for systems that do not support ENOTSUP
  39  * win32 being one of them */
  40 #ifndef ENOTSUP
  41 #define ENOTSUP 134             /* Not supported */
  42 #endif
  43
  44 /* for systems that do not support O_BINARY
  45  * linux being one of them */
  46 #ifndef O_BINARY
  47 #define O_BINARY 0
  48 #endif
  49
  50 #ifndef HAVE_SYS_TIME_H
  51
  52 #ifndef _TIMEVAL_DEFINED
  53 #define _TIMEVAL_DEFINED
  54
  55 struct timeval {
  56         long tv_sec;
  57         long tv_usec;
  58 };
  59
  60 #endif  /* _TIMEVAL_DEFINED */
  61
  62 #endif
  63
  64 /* gettimeofday() */
  65 #ifndef HAVE_GETTIMEOFDAY
  66
  67 #ifdef _WIN32
  68 struct timezone {
  69         int tz_minuteswest;
  70         int tz_dsttime;
  71 };
  72 #endif
  73 struct timezone;
  74
  75 int gettimeofday(struct timeval *tv, struct timezone *tz);
  76
  77 #endif
  78
  79 #ifndef IN_REPLACEMENTS_C
  80 /**** clear_malloc & fill_malloc ****/
  81 void *clear_malloc(size_t size);
  82 void *fill_malloc(size_t size);
  83 #endif
  84
  85 /*
  86  * Now you have 3 ways for the malloc function:
  87  *
  88  * 1. Do not change anything, use the original malloc
  89  *
  90  * 2. Use the clear_malloc function instead of the original malloc.
  91  *    In this case you must use the following define:
  92  *    #define malloc((_a)) clear_malloc((_a))
  93  *
  94  * 3. Use the fill_malloc function instead of the original malloc.
  95  *    In this case you must use the following define:
  96  *    #define malloc((_a)) fill_malloc((_a))
  97  *
  98  * We have figured out that there could exist some malloc problems
  99  * where variables are using without to be initialise. To find this
 100  * places, use the fill_malloc function. With this function we want
 101  * to initialize memory to some known bad state. This is quite easily
 102  * spotted in the debugger and will trap to an invalid address.
 103  *
 104  * clear_malloc can be used if you want to set not initialise
 105  * variable to 0.
 106  *
 107  * If you do not want to change the malloc function, to not use one of
 108  * the following macros. Which is the default way.
 109  */
 110
 111 /* #define malloc(_a) clear_malloc(_a)
 112  * #define malloc(_a) fill_malloc(_a) */
 113
 114 /* GNU extensions to the C library that may be missing on some systems */
 115 #ifndef HAVE_STRNDUP
 116 char *strndup(const char *s, size_t n);
 117 #endif  /* HAVE_STRNDUP */
 118
 119 #ifndef HAVE_STRNLEN
 120 size_t strnlen(const char *s, size_t maxlen);
 121 #endif  /* HAVE_STRNLEN */
 122
 123 #ifndef HAVE_USLEEP
 124 #ifdef _WIN32
 125 static inline unsigned usleep(unsigned int usecs)
 126 {
 127         Sleep((usecs/1000));
 128         return 0;
 129 }
 130 #else
 131 #error no usleep defined for your platform
 132 #endif
 133 #endif  /* HAVE_USLEEP */
 134
 135 /* Windows specific */
 136 #ifdef _WIN32
 137
 138 #define WIN32_LEAN_AND_MEAN
 139 #include <windows.h>
 140 #include <time.h>
 141
 142 /* win32 systems do not support ETIMEDOUT */
 143
 144 #ifndef ETIMEDOUT
 145 #define ETIMEDOUT WSAETIMEDOUT
 146 #endif
 147
 148 #if IS_MINGW == 1
 149 static inline unsigned char inb(unsigned short int port)
 150 {
 151         unsigned char _v;
 152         __asm__ __volatile__ ("inb %w1,%0" : "=a" (_v) : "Nd" (port));
 153         return _v;
 154 }
 155
 156 static inline void outb(unsigned char value, unsigned short int port)
 157 {
 158         __asm__ __volatile__ ("outb %b0,%w1" : : "a" (value), "Nd" (port));
 159 }
 160
 161 /* mingw does not have ffs, so use gcc builtin types */
 162 #define ffs __builtin_ffs
 163
 164 #endif  /* IS_MINGW */
 165
 166 int win_select(int max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv);
 167
 168 #endif  /* _WIN32 */
 169
 170 /* generic socket functions for Windows and Posix */
 171 static inline int write_socket(int handle, const void *buffer, unsigned int count)
 172 {
 173 #ifdef _WIN32
 174         return send(handle, buffer, count, 0);
 175 #else
 176         return write(handle, buffer, count);
 177 #endif
 178 }
 179
 180 static inline int read_socket(int handle, void *buffer, unsigned int count)
 181 {
 182 #ifdef _WIN32
 183         return recv(handle, buffer, count, 0);
 184 #else
 185         return read(handle, buffer, count);
 186 #endif
 187 }
 188
 189 static inline int close_socket(int sock)
 190 {
 191 #ifdef _WIN32
 192         return closesocket(sock);
 193 #else
 194         return close(sock);
 195 #endif
 196 }
 197
 198 static inline void socket_nonblock(int fd)
 199 {
 200 #ifdef _WIN32
 201         unsigned long nonblock = 1;
 202         ioctlsocket(fd, FIONBIO, &nonblock);
 203 #else
 204         int oldopts = fcntl(fd, F_GETFL, 0);
 205         fcntl(fd, F_SETFL, oldopts | O_NONBLOCK);
 206 #endif
 207 }
 208
 209 static inline int socket_select(int max_fd,
 210         fd_set *rfds,
 211         fd_set *wfds,
 212         fd_set *efds,
 213         struct timeval *tv)
 214 {
 215 #ifdef _WIN32
 216         return win_select(max_fd, rfds, wfds, efds, tv);
 217 #else
 218         return select(max_fd, rfds, wfds, efds, tv);
 219 #endif
 220 }
 221
 222 #ifndef HAVE_ELF_H
 223
 224 #include <helper/types.h>
 225
 226 typedef uint32_t Elf32_Addr;
 227 typedef uint16_t Elf32_Half;
 228 typedef uint32_t Elf32_Off;
 229 typedef int32_t Elf32_Sword;
 230 typedef uint32_t Elf32_Word;
 231 typedef uint32_t Elf32_Size;
 232 typedef Elf32_Off Elf32_Hashelt;
 233
 234 typedef struct {
 235         unsigned char e_ident[16];      /* Magic number and other info */
 236         Elf32_Half e_type;                      /* Object file type */
 237         Elf32_Half e_machine;                   /* Architecture */
 238         Elf32_Word e_version;                   /* Object file version */
 239         Elf32_Addr e_entry;                     /* Entry point virtual address */
 240         Elf32_Off e_phoff;                      /* Program header table file offset */
 241         Elf32_Off e_shoff;                      /* Section header table file offset */
 242         Elf32_Word e_flags;                     /* Processor-specific flags */
 243         Elf32_Half e_ehsize;                    /* ELF header size in bytes */
 244         Elf32_Half e_phentsize;         /* Program header table entry size */
 245         Elf32_Half e_phnum;                     /* Program header table entry count */
 246         Elf32_Half e_shentsize;         /* Section header table entry size */
 247         Elf32_Half e_shnum;                     /* Section header table entry count */
 248         Elf32_Half e_shstrndx;                  /* Section header string table index */
 249 } Elf32_Ehdr;
 250
 251 #define ELFMAG                  "\177ELF"
 252 #define SELFMAG                 4
 253
 254 #define EI_CLASS                4               /* File class byte index */
 255 #define ELFCLASS32              1               /* 32-bit objects */
 256 #define ELFCLASS64              2               /* 64-bit objects */
 257
 258 #define EI_DATA                 5               /* Data encoding byte index */
 259 #define ELFDATA2LSB             1               /* 2's complement, little endian */
 260 #define ELFDATA2MSB             2               /* 2's complement, big endian */
 261
 262 typedef struct {
 263         Elf32_Word p_type;              /* Segment type */
 264         Elf32_Off p_offset;             /* Segment file offset */
 265         Elf32_Addr p_vaddr;             /* Segment virtual address */
 266         Elf32_Addr p_paddr;             /* Segment physical address */
 267         Elf32_Size p_filesz;    /* Segment size in file */
 268         Elf32_Size p_memsz;             /* Segment size in memory */
 269         Elf32_Word p_flags;             /* Segment flags */
 270         Elf32_Size p_align;             /* Segment alignment */
 271 } Elf32_Phdr;
 272
 273 #define PT_LOAD                 1               /* Loadable program segment */
 274
 275 #endif  /* HAVE_ELF_H */
 276
 277 #endif  /* REPLACEMENTS_H */