prelude.h

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#   include <arpa/inet.h>
#   if (!defined (TCP_NODELAY))
#       include <netinet/tcp.h>
#   endif
#endif
/*                                                                           */


/*- Data types --------------------------------------------------------------*/

typedef unsigned short  Bool;           /*  Boolean TRUE/FALSE value         */
typedef unsigned char   byte;           /*  Single unsigned byte = 8 bits    */
typedef unsigned short  dbyte;          /*  Double byte = 16 bits            */
typedef unsigned short  word;           /*  Alternative for double-byte      */
typedef unsigned long   dword;          /*  Double word >= 32 bits           */
#if (defined (__IS_32BIT__))
typedef unsigned long   qbyte;          /*  Quad byte = 32 bits              */
#else
typedef unsigned int    qbyte;          /*  Quad byte = 32 bits              */
#endif
typedef void (*function) (void);        /*  Address of simple function       */
#define local static void               /*  Shorthand for local functions    */

typedef struct {                        /*  Memory descriptor                */
    size_t size;                        /*    Size of data part              */
    byte  *data;                        /*    Data part follows here         */
} DESCR;

typedef struct {                        /*  Variable-size descriptor         */
    size_t max_size;                    /*    Maximum size of data part      */
    size_t cur_size;                    /*    Current size of data part      */
    byte  *data;                        /*    Data part follows here         */
} VDESCR;


/*- Check compiler data type sizes ------------------------------------------*/

#if (UCHAR_MAX != 0xFF)
#   error "Cannot compile: must change definition of 'byte'."
#endif
#if (USHRT_MAX != 0xFFFFU)
#   error "Cannot compile: must change definition of 'dbyte'."
#endif
#if (defined (__IS_32BIT__))
#   if (ULONG_MAX != 0xFFFFFFFFUL)
#       error "Cannot compile: must change definition of 'qbyte'."
#   endif
#else
#   if (UINT_MAX != 0xFFFFFFFFU)
#       error "Cannot compile: must change definition of 'qbyte'."
#   endif
#endif


/*- Pseudo-functions --------------------------------------------------------*/

#define FOREVER         for (;;)            /*  FOREVER { ... }              */
#define until(expr)     while (!(expr))     /*  do { ... } until (expr)      */
#define streq(s1,s2)    (!strcmp ((s1), (s2)))
#define strneq(s1,s2)   (strcmp ((s1), (s2)))
#define strused(s)      (*(s) != 0)
#define strnull(s)      (*(s) == 0)
#define strclr(s)       (*(s) = 0)
#define strlast(s)      ((s) [strlen (s) - 1])
#define strterm(s)      ((s) [strlen (s)])

#define bit_msk(bit)    (1 << (bit))
#define bit_set(x,bit)  ((x) |=  bit_msk (bit))
#define bit_clr(x,bit)  ((x) &= ~bit_msk (bit))
#define bit_tst(x,bit)  ((x) &   bit_msk (bit))

#define tblsize(x)      (sizeof (x) / sizeof ((x) [0]))
#define tbllast(x)      (x [tblsize (x) - 1])

#if (defined (random))
#   undef random
#   undef randomize
#endif
#if (defined (min))
#   undef min
#   undef max
#endif

#if (defined (__IS_32BIT__))
#define random(num)     (int) ((long) rand () % (num))
#else
#define random(num)     (int) ((int)  rand () % (num))
#endif
#define randomize()     srand ((unsigned) time (NULL))
#define min(a,b)        (((a) < (b))? (a): (b))
#define max(a,b)        (((a) > (b))? (a): (b))


/*- ASSERT ------------------------------------------------------------------*/
/*  If DEBUG is defined, the ASSERT macro aborts if the specified condition
 *  is false.  Note that you must include sflsyst.c in your application, for
 *  the sys_assert() function.
 */
/* not used for our crypt functions in php*/
#if (0)
void sys_assert (const char *file, unsigned line);
#   undef  ASSERT
#   define ASSERT(f)    \
        if (f)          \
            ;           \
        else            \
            sys_assert (__FILE__, __LINE__)
#else
#   define ASSERT(f)
#endif

/*- Boolean operators and constants -----------------------------------------*/

#if (!defined (TRUE))
#    define TRUE        1               /*  ANSI standard                    */
#    define FALSE       0
#endif


/*- Symbolic constants ------------------------------------------------------*/

#define FORK_ERROR      -1              /*  Return codes from fork()         */
#define FORK_CHILD      0

#if (!defined (LINE_MAX))               /*  Length of line from text file    */
#   define LINE_MAX     255             /*    if not previously #define'd    */
#endif
#if (!defined (PATH_MAX))               /*  Length of path variable          */
#   define PATH_MAX     2048            /*    if not previously #define'd    */
#endif                                  /*  EDM 96/05/28                     */

#if (!defined (EXIT_SUCCESS))           /*  ANSI, and should be in stdlib.h  */
#   define EXIT_SUCCESS 0               /*    but not defined on SunOs with  */
#   define EXIT_FAILURE 1               /*    GCC, sometimes.                */
#endif


/*- System-specific definitions ---------------------------------------------*/

/*  On most systems, 'timezone' is an external long variable.  On a few, it
 *  is a function that returns a string.  We define TIMEZONE to be the long
 *  value.                                                                   */

#define TIMEZONE    timezone            /*  Unless redefined later           */

/*  UNIX defines sleep() in terms of second; Win32 defines Sleep() in
 *  terms of milliseconds.  We want to be able to use sleep() anywhere.      */

#if (defined (__WINDOWS__))
#  if !defined(sleep)
#   if (defined (WIN32))
#       define sleep(a) Sleep(a*1000)   /*  UNIX sleep() is seconds          */
#   else
#       define sleep(a)                 /*  Do nothing?                      */
#   endif
#  endif
    /*  MSVC 1.x does not define standard signals if in Windows              */
#   if (!defined (SIGINT))
#   define SIGINT       2               /*  Ctrl-C sequence                  */
#   define SIGILL       4               /*  Illegal instruction              */
#   define SIGSEGV      11              /*  Segment violation                */
#   define SIGTERM      15              /*  Kill signal                      */
#   define SIGABRT      22              /*  Termination by abort()           */
#   endif
    /*  MSVC 4.x does not define SIGALRM, so we pinch SIGFPE                 */
#   if (!defined (SIGALRM))
#   define SIGALRM      SIGFPE          /*  Must be a known signal           */
#   endif

/*  On SunOs, the ANSI C compiler costs extra, so many people install gcc
 *  but using the standard non-ANSI C library.  We have to make a few extra
 *  definitions for this case.  (Here we defined just what we needed for
 *  Libero and SMT -- we'll add more code as required.)                      */

#elif (defined (__UTYPE_SUNOS) || defined (__UTYPE_SUNSOLARIS))
#   if (!defined (_SIZE_T))             /*  Non-ANSI headers/libraries       */
#       define strerror(n)      sys_errlist [n]
#       define memmove(d,s,l)   bcopy (s,d,l)
        extern char *sys_errlist [];
#   endif
    extern char **environ;              /*  Not defined in include files     */

#elif (defined (__UTYPE_BSDOS))
#   define TIMEZONE 0                   /*  timezone is not available        */
    extern char **environ;              /*  Not defined in include files     */

#elif (defined (__UTYPE_SCO) || defined (__UTYPE_UNIXWARE))
    extern char **environ;              /*  Not defined in include files     */

#elif (defined (__UTYPE_FREEBSD))
#   define TIMEZONE 0                   /*  timezone is not available        */
    extern char **environ;              /*  Not defined in include files     */

#elif (defined (__UTYPE_HPUX))
    extern char **environ;              /*  Not defined in include files     */

#elif (defined (__UTYPE_NETBSD))
#   define TIMEZONE 0                   /*  timezone is not available        */
    extern char **environ;              /*  Not defined in include files     */

#elif (defined (__UTYPE_IRIX))
    extern char **environ;              /*  Not defined in include files     */

#elif (defined (__UTYPE_SINIX))
    extern char **environ;              /*  Not defined in include files     */

#elif (defined (__VMS__))
    extern char **environ;              /*  Not defined in include files     */

    /*  This data structure is often used in OpenVMS library functions       */
    typedef struct {                    /*  Fixed-string descriptor:         */
        word  length;                   /*    Length of string in bytes      */
        byte  dtype;                    /*    Must be DSC$K_DTYPE_T = 14     */
        byte  class;                    /*    Must be DSC$K_CLASS_S = 1      */
        char *value;                    /*    Address of start of string     */
    } STRING_DESC;
    #define VMS_STRING(name,value) STRING_DESC name = \
                                        { sizeof (value) - 1, 14, 1, value }
#endif

/*  On some systems (older Vaxen and Unixes) O_BINARY is not defined.        */

#if (!defined (O_BINARY))
#   define O_BINARY     0
#endif

/*  On some systems SIGALRM is not defined; we allow it in code anyhow       */

#if (!defined (SIGALRM))
#   define SIGALRM      1
#endif

/*  On some systems O_NDELAY is used instead of O_NONBLOCK                   */

#if (!defined (O_NONBLOCK))
#   if (!defined (O_NDELAY))
#       define O_NDELAY 0
#   endif
#   if (defined (__VMS__))
#       define O_NONBLOCK 0             /*  Can't use O_NONBLOCK on files    */
#   else
#       define O_NONBLOCK O_NDELAY
#   endif
#endif

/*  We define constants for the way the current system formats filenames;
 *  we assume that the system has some type of path concept.                 */

#if (defined (WIN32))                   /*  Windows 95/NT                    */
#   define PATHSEP      ";"             /*  Separates path components        */
#   define PATHEND      '\\'            /*  Delimits directory and filename  */
#   define PATHFOLD     FALSE           /*  Convert pathvalue to uppercase?  */
#   define NAMEFOLD     FALSE           /*  Convert filenames to uppercase?  */
#   define MSDOS_FILESYSTEM             /*  MS-DOS derivative                */
#elif (defined (__MSDOS__))             /*  16-bit Windows, MS-DOS           */
#   define PATHSEP      ";"
#   define PATHEND      '\\'
#   define PATHFOLD     TRUE
#   define NAMEFOLD     TRUE
#   define MSDOS_FILESYSTEM             /*  MS-DOS derivative                */
#elif (defined (__VMS__))               /*  Digital OpenVMS                  */
#   define PATHSEP      ","             /*    We work with POSIX filenames   */
#   define PATHEND      '/'
#   define PATHFOLD     TRUE
#   define NAMEFOLD     TRUE
#elif (defined (__UNIX__))              /*  All UNIXes                       */
#   define PATHSEP      ":"
#   define PATHEND      '/'
#   define PATHFOLD     FALSE
#   define NAMEFOLD     FALSE
#elif (defined (__OS2__))               /*  OS/2 using EMX/GCC               */
#   define PATHSEP      ";"             /*  EDM 96/05/28                     */
#   define PATHEND      '\\'
#   define PATHFOLD     TRUE
#   define NAMEFOLD     FALSE
#   define MSDOS_FILESYSTEM             /*  MS-DOS derivative                */
#else
#   error "No definitions for PATH constants"
#endif


/*- Capability definitions --------------------------------------------------*/
/*
 *  Defines zero or more of these symbols, for use in any non-portable
 *  code:
 *
 *  DOES_SOCKETS        We can use (at least some) BSD socket functions
 *  DOES_UID            We can use (at least some) uid access functions
 */

#if (defined (AF_INET))
#   define DOES_SOCKETS                 /*  System supports BSD sockets      */
#else
#   undef  DOES_SOCKETS
#   define ntohs(x)     (x)             /*  Needs to be correct for the      */
#   define ntohl(x)     (x)             /*    platform as far as possible    */
#   define htons(x)     (x)
#   define htonl(x)     (x)
#endif

#if (defined (__UNIX__) || defined (__VMS__) || defined (__OS2__))
#   define DOES_UID                     /*  System supports uid functions    */
#else
#   undef  DOES_UID
    typedef int gid_t;                  /*  Group id type                    */
    typedef int uid_t;                  /*  User id type                     */
#endif


#endif                                  /*  Include PRELUDE.H                */