src/src/mytypes.h

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2018 */
   6 /* Copyright (c) The Exim Maintainers 2020 */
   7 /* See the file NOTICE for conditions of use and distribution. */
   8
   9
  10 /* This header file contains type definitions and macros that I use as
  11 "standard" in the code of Exim and its utilities. Make it idempotent because
  12 local_scan.h includes it and exim.h includes them both (to get this earlier). */
  13
  14 #ifndef MYTYPES_H
  15 #define MYTYPES_H
  16
  17 # include <string.h>
  18
  19 #ifndef FALSE
  20 # define FALSE         0
  21 #endif
  22
  23 #ifndef TRUE
  24 # define TRUE          1
  25 #endif
  26
  27 #ifndef TRUE_UNSET
  28 # define TRUE_UNSET    2
  29 #endif
  30
  31
  32 /* If gcc is being used to compile Exim, we can use its facility for checking
  33 the arguments of printf-like functions. This is done by a macro. */
  34
  35 #if defined(__GNUC__) || defined(__clang__)
  36 # define PRINTF_FUNCTION(A,B)   __attribute__((format(printf,A,B)))
  37 # define ARG_UNUSED             __attribute__((__unused__))
  38 # define WARN_UNUSED_RESULT     __attribute__((__warn_unused_result__))
  39 # define ALLOC                  __attribute__((malloc))
  40 # define ALLOC_SIZE(A)          __attribute__((alloc_size(A)))
  41 # define NORETURN               __attribute__((noreturn))
  42 #else
  43 # define PRINTF_FUNCTION(A,B)
  44 # define ARG_UNUSED             /**/
  45 # define WARN_UNUSED_RESULT     /**/
  46 # define ALLOC                  /**/
  47 # define ALLOC_SIZE(A)          /**/
  48 # define NORETURN               /**/
  49 #endif
  50
  51 #ifdef WANT_DEEPER_PRINTF_CHECKS
  52 # define ALMOST_PRINTF(A, B) PRINTF_FUNCTION(A, B)
  53 #else
  54 # define ALMOST_PRINTF(A, B)
  55 #endif
  56
  57
  58 /* Some operating systems (naughtily, imo) include a definition for "uchar" in
  59 the standard header files, so we use "uschar". Solaris has u_char in
  60 sys/types.h. This is just a typing convenience, of course. */
  61
  62 typedef unsigned char uschar;
  63 typedef unsigned BOOL;
  64 /* We also have SIGNAL_BOOL, which requires signal.h be included, so is defined
  65 elsewhere */
  66
  67
  68 /* These macros save typing for the casting that is needed to cope with the
  69 mess that is "char" in ISO/ANSI C. Having now been bitten enough times by
  70 systems where "char" is actually signed, I've converted Exim to use entirely
  71 unsigned chars, except in a few special places such as arguments that are
  72 almost always literal strings. */
  73
  74 #define CS   (char *)
  75 #define CCS  (const char *)
  76 #define CSS  (char **)
  77 #define US   (unsigned char *)
  78 #define CUS  (const unsigned char *)
  79 #define USS  (unsigned char **)
  80 #define CUSS (const unsigned char **)
  81 #define CCSS (const char **)
  82
  83 /* The C library string functions expect "char *" arguments. Use macros to
  84 avoid having to write a cast each time. We do this for string and file
  85 functions that are called quite often; for other calls to external libraries
  86 (which are on the whole special-purpose) we just use individual casts. */
  87
  88 #define Uatoi(s)           atoi(CCS(s))
  89 #define Uatol(s)           atol(CCS(s))
  90 #define Uchdir(s)          chdir(CCS(s))
  91 #define Uchmod(s,n)        chmod(CCS(s),n)
  92 #define Ufgets(b,n,f)      fgets(CS(b),n,f)
  93 #define Ufopen(s,t)        exim_fopen(CCS(s),CCS(t))
  94 #define Ulink(s,t)         link(CCS(s),CCS(t))
  95 #define Ulstat(s,t)        lstat(CCS(s),t)
  96
  97 #ifdef O_BINARY                                                 /* This is for Cygwin,  */
  98 # define Uopen(s,n,m)       exim_open(CCS(s),(n)|O_BINARY,m)    /* where all files must */
  99 # define Uopen2(s,n)        exim_open2(CCS(s),(n)|O_BINARY)
 100 #else                                                           /* be opened as binary  */
 101 # define Uopen(s,n,m)       exim_open(CCS(s),n,m)               /* to avoid problems    */
 102 # define Uopen2(s,n)        exim_open2(CCS(s),n)
 103 #endif                                                          /* with CRLF endings.   */
 104 #define Uread(f,b,l)       read(f,CS(b),l)
 105 #define Urename(s,t)       rename(CCS(s),CCS(t))
 106 #define Ustat(s,t)         stat(CCS(s),t)
 107 #define Ustrchr(s,n)       US strchr(CCS(s),n)
 108 #define CUstrchr(s,n)      CUS strchr(CCS(s),n)
 109 #define CUstrerror(n)      CUS strerror(n)
 110 #define Ustrcmp(s,t)       strcmp(CCS(s),CCS(t))
 111 #define Ustrcpy_nt(s,t)    strcpy(CS s, CCS t)          /* no taint check */
 112 #define Ustrcspn(s,t)      strcspn(CCS(s),CCS(t))
 113 #define Ustrftime(s,m,f,t) strftime(CS(s),m,f,t)
 114 #define Ustrlen(s)         (int)strlen(CCS(s))
 115 #define Ustrncmp(s,t,n)    strncmp(CCS(s),CCS(t),n)
 116 #define Ustrncpy_nt(s,t,n) strncpy(CS s, CCS t, n)      /* no taint check */
 117 #define Ustrpbrk(s,t)      strpbrk(CCS(s),CCS(t))
 118 #define Ustrrchr(s,n)      US strrchr(CCS(s),n)
 119 #define CUstrrchr(s,n)     CUS strrchr(CCS(s),n)
 120 #define Ustrspn(s,t)       strspn(CCS(s),CCS(t))
 121 #define Ustrstr(s,t)       US strstr(CCS(s),CCS(t))
 122 #define CUstrstr(s,t)      CUS strstr(CCS(s),CCS(t))
 123 #define Ustrtod(s,t)       strtod(CCS(s),CSS(t))
 124 #define Ustrtol(s,t,b)     strtol(CCS(s),CSS(t),b)
 125 #define Ustrtoul(s,t,b)    strtoul(CCS(s),CSS(t),b)
 126 #define Uunlink(s)         unlink(CCS(s))
 127
 128 #if defined(EM_VERSION_C) || defined(LOCAL_SCAN) || defined(DLFUNC_IMPL)
 129 # define Ustrcat(s,t)       strcat(CS(s), CCS(t))
 130 # define Ustrcpy(s,t)       strcpy(CS(s), CCS(t))
 131 # define Ustrncat(s,t,n)    strncat(CS(s), CCS(t), n)
 132 # define Ustrncpy(s,t,n)    strncpy(CS(s), CCS(t), n)
 133 #else
 134 # define Ustrcat(s,t)       __Ustrcat(s, CUS(t), __FUNCTION__, __LINE__)
 135 # define Ustrcpy(s,t)       __Ustrcpy(s, CUS(t), __FUNCTION__, __LINE__)
 136 # define Ustrncat(s,t,n)    __Ustrncat(s, CUS(t), n, __FUNCTION__, __LINE__)
 137 # define Ustrncpy(s,t,n)    __Ustrncpy(s, CUS(t), n, __FUNCTION__, __LINE__)
 138 #endif
 139
 140 #endif
 141 /* End of mytypes.h */