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 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #include "types.h"
  34 #include "system.h"
  35
  36 /* MIN,MAX macros */
  37 #ifndef MIN
  38 #define MIN(a,b) (((a)<(b))?(a):(b))
  39 #endif
  40 #ifndef MAX
  41 #define MAX(a,b) (((a)>(b))?(a):(b))
  42 #endif
  43
  44 /* for systems that do not support ENOTSUP
  45  * win32 being one of them */
  46 #ifndef ENOTSUP
  47 #define ENOTSUP 134             /* Not supported */
  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 extern int gettimeofday(struct timeval *tv, struct timezone *tz);
  76 #endif
  77
  78 #ifndef IN_REPLACEMENTS_C
  79 /**** clear_malloc & fill_malloc ****/
  80 void *clear_malloc(size_t size);
  81 void *fill_malloc(size_t size);
  82 #endif
  83
  84 /*
  85  * Now you have 3 ways for the malloc function:
  86  *
  87  * 1. Do not change anything, use the original malloc
  88  *
  89  * 2. Use the clear_malloc function instead of the original malloc.
  90  *    In this case you must use the following define:
  91  *    #define malloc((_a)) clear_malloc((_a))
  92  *
  93  * 3. Use the fill_malloc function instead of the original malloc.
  94  *    In this case you must use the following define:
  95  *    #define malloc((_a)) fill_malloc((_a))
  96  *
  97  * We have figured out that there could exist some malloc problems
  98  * where variables are using without to be initialise. To find this
  99  * places, use the fill_malloc function. With this function we want
 100  * to initialize memory to some known bad state. This is quite easily
 101  * spotted in the debugger and will trap to an invalid address.
 102  *
 103  * clear_malloc can be used if you want to set not initialise
 104  * variable to 0.
 105  *
 106  * If you do not want to change the malloc function, to not use one of
 107  * the following macros. Which is the default way.
 108  */
 109
 110 /* #define malloc(_a) clear_malloc(_a) */
 111 /* #define malloc(_a) fill_malloc(_a) */
 112
 113 /* GNU extensions to the C library that may be missing on some systems */
 114 #ifndef HAVE_STRNDUP
 115 extern char* strndup(const char *s, size_t n);
 116 #endif /* HAVE_STRNDUP */
 117
 118 #ifndef HAVE_STRNLEN
 119 extern size_t strnlen(const char *s, size_t maxlen);
 120 #endif /* HAVE_STRNLEN */
 121
 122 #ifndef HAVE_USLEEP
 123 #ifdef _WIN32
 124 static __inline unsigned usleep(unsigned int usecs)
 125 {
 126         Sleep((usecs/1000));
 127         return 0;
 128 }
 129 #else
 130 #if BUILD_ECOSBOARD
 131 void usleep(int us);
 132 #else
 133 #error no usleep defined for your platform
 134 #endif
 135 #endif
 136 #endif /* HAVE_USLEEP */
 137
 138 /* Windows specific */
 139 #ifdef _WIN32
 140
 141 #define WIN32_LEAN_AND_MEAN
 142 #include <windows.h>
 143 #include <time.h>
 144
 145 /* win32 systems do not support ETIMEDOUT */
 146
 147 #ifndef ETIMEDOUT
 148 #define ETIMEDOUT WSAETIMEDOUT
 149 #endif
 150
 151 #if IS_MINGW == 1
 152 static __inline unsigned char inb(unsigned short int port)
 153 {
 154         unsigned char _v;
 155         __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (port));
 156         return _v;
 157 }
 158
 159 static __inline void outb(unsigned char value, unsigned short int port)
 160 {
 161         __asm__ __volatile__ ("outb %b0,%w1": :"a" (value), "Nd" (port));
 162 }
 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, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv)
 210 {
 211 #ifdef _WIN32
 212         return win_select(max_fd, rfds, wfds, efds, tv);
 213 #else
 214         return select(max_fd, rfds, wfds, efds, tv);
 215 #endif
 216 }
 217
 218 #ifndef HAVE_ELF_H
 219
 220 typedef struct
 221 {
 222         unsigned char   e_ident[16];    /* Magic number and other info */
 223         u16     e_type;                 /* Object file type */
 224         u16     e_machine;              /* Architecture */
 225         u32     e_version;              /* Object file version */
 226         u32 e_entry;            /* Entry point virtual address */
 227         u32 e_phoff;            /* Program header table file offset */
 228         u32     e_shoff;                /* Section header table file offset */
 229         u32     e_flags;                /* Processor-specific flags */
 230         u16     e_ehsize;               /* ELF header size in bytes */
 231         u16     e_phentsize;    /* Program header table entry size */
 232         u16     e_phnum;                /* Program header table entry count */
 233         u16     e_shentsize;    /* Section header table entry size */
 234         u16     e_shnum;                /* Section header table entry count */
 235         u16     e_shstrndx;             /* Section header string table index */
 236 } Elf32_Ehdr;
 237
 238 #define ELFMAG          "\177ELF"
 239 #define SELFMAG         4
 240
 241 #define EI_CLASS        4               /* File class byte index */
 242 #define ELFCLASS32      1               /* 32-bit objects */
 243 #define ELFCLASS64      2               /* 64-bit objects */
 244
 245 #define EI_DATA         5               /* Data encoding byte index */
 246 #define ELFDATA2LSB     1               /* 2's complement, little endian */
 247 #define ELFDATA2MSB     2               /* 2's complement, big endian */
 248
 249 typedef struct
 250 {
 251         u32 p_type;                     /* Segment type */
 252         u32 p_offset;           /* Segment file offset */
 253         u32 p_vaddr;            /* Segment virtual address */
 254         u32 p_paddr;            /* Segment physical address */
 255         u32 p_filesz;           /* Segment size in file */
 256         u32 p_memsz;            /* Segment size in memory */
 257         u32 p_flags;            /* Segment flags */
 258         u32 p_align;            /* Segment alignment */
 259 } Elf32_Phdr;
 260
 261 #define PT_LOAD         1               /* Loadable program segment */
 262
 263 #endif /* HAVE_ELF_H */
 264
 265 #endif /* REPLACEMENTS_H */