src/src/mytypes.h

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2018 */
   6 /* See the file NOTICE for conditions of use and distribution. */
   7
   8
   9 /* This header file contains type definitions and macros that I use as
  10 "standard" in the code of Exim and its utilities. Make it idempotent because
  11 local_scan.h includes it and exim.h includes them both (to get this earlier). */
  12
  13 #ifndef MYTYPES_H
  14 #define MYTYPES_H
  15
  16 #ifndef FALSE
  17 # define FALSE         0
  18 #endif
  19
  20 #ifndef TRUE
  21 # define TRUE          1
  22 #endif
  23
  24 #ifndef TRUE_UNSET
  25 # define TRUE_UNSET    2
  26 #endif
  27
  28
  29 /* If gcc is being used to compile Exim, we can use its facility for checking
  30 the arguments of printf-like functions. This is done by a macro. */
  31
  32 #if defined(__GNUC__) || defined(__clang__)
  33 # define PRINTF_FUNCTION(A,B)   __attribute__((format(printf,A,B)))
  34 # define ARG_UNUSED             __attribute__((__unused__))
  35 # define WARN_UNUSED_RESULT     __attribute__((__warn_unused_result__))
  36 # define ALLOC                  __attribute__((malloc))
  37 # define ALLOC_SIZE(A)          __attribute__((alloc_size(A)))
  38 # define NORETURN               __attribute__((noreturn))
  39 #else
  40 # define PRINTF_FUNCTION(A,B)
  41 # define ARG_UNUSED             /**/
  42 # define WARN_UNUSED_RESULT     /**/
  43 # define ALLOC                  /**/
  44 # define ALLOC_SIZE(A)          /**/
  45 # define NORETURN               /**/
  46 #endif
  47
  48 #ifdef WANT_DEEPER_PRINTF_CHECKS
  49 # define ALMOST_PRINTF(A, B) PRINTF_FUNCTION(A, B)
  50 #else
  51 # define ALMOST_PRINTF(A, B)
  52 #endif
  53
  54
  55 /* Some operating systems (naughtily, imo) include a definition for "uchar" in
  56 the standard header files, so we use "uschar". Solaris has u_char in
  57 sys/types.h. This is just a typing convenience, of course. */
  58
  59 typedef unsigned char uschar;
  60 typedef unsigned BOOL;
  61 /* We also have SIGNAL_BOOL, which requires signal.h be included, so is defined
  62 elsewhere */
  63
  64
  65 /* These macros save typing for the casting that is needed to cope with the
  66 mess that is "char" in ISO/ANSI C. Having now been bitten enough times by
  67 systems where "char" is actually signed, I've converted Exim to use entirely
  68 unsigned chars, except in a few special places such as arguments that are
  69 almost always literal strings. */
  70
  71 #define CS   (char *)
  72 #define CCS  (const char *)
  73 #define CSS  (char **)
  74 #define US   (unsigned char *)
  75 #define CUS  (const unsigned char *)
  76 #define USS  (unsigned char **)
  77 #define CUSS (const unsigned char **)
  78
  79 /* The C library string functions expect "char *" arguments. Use macros to
  80 avoid having to write a cast each time. We do this for string and file
  81 functions that are called quite often; for other calls to external libraries
  82 (which are on the whole special-purpose) we just use individual casts. */
  83
  84 #define Uatoi(s)           atoi(CCS(s))
  85 #define Uatol(s)           atol(CCS(s))
  86 #define Uchdir(s)          chdir(CCS(s))
  87 #define Uchmod(s,n)        chmod(CCS(s),n)
  88 #define Ufgets(b,n,f)      fgets(CS(b),n,f)
  89 #define Ufopen(s,t)        fopen(CCS(s),CCS(t))
  90 #define Ulink(s,t)         link(CCS(s),CCS(t))
  91 #define Ulstat(s,t)        lstat(CCS(s),t)
  92
  93 #ifdef O_BINARY                                        /* This is for Cygwin,  */
  94 #define Uopen(s,n,m)       open(CCS(s),(n)|O_BINARY,m) /* where all files must */
  95 #else                                                  /* be opened as binary  */
  96 #define Uopen(s,n,m)       open(CCS(s),n,m)            /* to avoid problems    */
  97 #endif                                                 /* with CRLF endings.   */
  98 #define Uread(f,b,l)       read(f,CS(b),l)
  99 #define Urename(s,t)       rename(CCS(s),CCS(t))
 100 #define Ustat(s,t)         stat(CCS(s),t)
 101 #define Ustrcat(s,t)       strcat(CS(s),CCS(t))
 102 #define Ustrchr(s,n)       US strchr(CCS(s),n)
 103 #define CUstrchr(s,n)      CUS strchr(CCS(s),n)
 104 #define CUstrerror(n)      CUS strerror(n)
 105 #define Ustrcmp(s,t)       strcmp(CCS(s),CCS(t))
 106 #define Ustrcpy(s,t)       strcpy(CS(s),CCS(t))
 107 #define Ustrcspn(s,t)      strcspn(CCS(s),CCS(t))
 108 #define Ustrftime(s,m,f,t) strftime(CS(s),m,f,t)
 109 #define Ustrlen(s)         (int)strlen(CCS(s))
 110 #define Ustrncat(s,t,n)    strncat(CS(s),CCS(t),n)
 111 #define Ustrncmp(s,t,n)    strncmp(CCS(s),CCS(t),n)
 112 #define Ustrncpy(s,t,n)    strncpy(CS(s),CCS(t),n)
 113 #define Ustrpbrk(s,t)      strpbrk(CCS(s),CCS(t))
 114 #define Ustrrchr(s,n)      US strrchr(CCS(s),n)
 115 #define CUstrrchr(s,n)     CUS strrchr(CCS(s),n)
 116 #define Ustrspn(s,t)       strspn(CCS(s),CCS(t))
 117 #define Ustrstr(s,t)       US strstr(CCS(s),CCS(t))
 118 #define CUstrstr(s,t)      CUS strstr(CCS(s),CCS(t))
 119 #define Ustrtod(s,t)       strtod(CCS(s),CSS(t))
 120 #define Ustrtol(s,t,b)     strtol(CCS(s),CSS(t),b)
 121 #define Ustrtoul(s,t,b)    strtoul(CCS(s),CSS(t),b)
 122 #define Uunlink(s)         unlink(CCS(s))
 123
 124 #endif
 125
 126 /* End of mytypes.h */