src/src/mytypes.h

   1 /* $Cambridge: exim/src/src/mytypes.h,v 1.7 2009/11/16 19:50:37 nm4 Exp $ */
   2
   3 /*************************************************
   4 *     Exim - an Internet mail transport agent    *
   5 *************************************************/
   6
   7 /* Copyright (c) University of Cambridge 1995 - 2009 */
   8 /* See the file NOTICE for conditions of use and distribution. */
   9
  10
  11 /* This header file contains type definitions and macros that I use as
  12 "standard" in the code of Exim and its utilities. Make it idempotent because
  13 local_scan.h includes it and exim.h includes them both (to get this earlier). */
  14
  15 #ifndef MYTYPES_H
  16 #define MYTYPES_H
  17
  18 #ifndef FALSE
  19 #define FALSE         0
  20 #endif
  21
  22 #ifndef TRUE
  23 #define TRUE          1
  24 #endif
  25
  26 #ifndef TRUE_UNSET
  27 #define TRUE_UNSET    2
  28 #endif
  29
  30
  31 /* If gcc is being used to compile Exim, we can use its facility for checking
  32 the arguments of printf-like functions. This is done by a macro. */
  33
  34 #if defined(__GNUC__) || defined(__clang__)
  35 #define PRINTF_FUNCTION(A,B)  __attribute__((format(printf,A,B)))
  36 #else
  37 #define PRINTF_FUNCTION(A,B)
  38 #endif
  39
  40
  41 /* Some operating systems (naughtily, imo) include a definition for "uchar" in
  42 the standard header files, so we use "uschar". Solaris has u_char in
  43 sys/types.h. This is just a typing convenience, of course. */
  44
  45 typedef unsigned char uschar;
  46 typedef int BOOL;
  47 /* We also have SIGNAL_BOOL, which requires signal.h be included, so is defined
  48 elsewhere */
  49
  50
  51 /* These macros save typing for the casting that is needed to cope with the
  52 mess that is "char" in ISO/ANSI C. Having now been bitten enough times by
  53 systems where "char" is actually signed, I've converted Exim to use entirely
  54 unsigned chars, except in a few special places such as arguments that are
  55 almost always literal strings. */
  56
  57 #define CS   (char *)
  58 #define CCS  (const char *)
  59 #define CSS  (char **)
  60 #define US   (unsigned char *)
  61 #define CUS  (const unsigned char *)
  62 #define USS  (unsigned char **)
  63
  64 /* The C library string functions expect "char *" arguments. Use macros to
  65 avoid having to write a cast each time. We do this for string and file
  66 functions that are called quite often; for other calls to external libraries
  67 (which are on the whole special-purpose) we just use individual casts. */
  68
  69 #define Uatoi(s)           atoi(CCS(s))
  70 #define Uatol(s)           atol(CCS(s))
  71 #define Uchdir(s)          chdir(CCS(s))
  72 #define Uchmod(s,n)        chmod(CCS(s),n)
  73 #define Uchown(s,n,m)      chown(CCS(s),n,m)
  74 #define Ufgets(b,n,f)      fgets(CS(b),n,f)
  75 #define Ufopen(s,t)        fopen(CCS(s),CCS(t))
  76 #define Ulink(s,t)         link(CCS(s),CCS(t))
  77 #define Ulstat(s,t)        lstat(CCS(s),t)
  78
  79 #ifdef O_BINARY                                        /* This is for Cygwin,  */
  80 #define Uopen(s,n,m)       open(CCS(s),(n)|O_BINARY,m) /* where all files must */
  81 #else                                                  /* be opened as binary  */
  82 #define Uopen(s,n,m)       open(CCS(s),n,m)            /* to avoid problems    */
  83 #endif                                                 /* with CRLF endings.   */
  84 #define Uread(f,b,l)       read(f,CS(b),l)
  85 #define Urename(s,t)       rename(CCS(s),CCS(t))
  86 #define Ustat(s,t)         stat(CCS(s),t)
  87 #define Ustrcat(s,t)       strcat(CS(s),CCS(t))
  88 #define Ustrchr(s,n)       US strchr(CCS(s),n)
  89 #define CUstrchr(s,n)      CUS strchr(CCS(s),n)
  90 #define CUstrerror(n)      CUS strerror(n)
  91 #define Ustrcmp(s,t)       strcmp(CCS(s),CCS(t))
  92 #define Ustrcpy(s,t)       strcpy(CS(s),CCS(t))
  93 #define Ustrcspn(s,t)      strcspn(CCS(s),CCS(t))
  94 #define Ustrftime(s,m,f,t) strftime(CS(s),m,f,t)
  95 #define Ustrlen(s)         (int)strlen(CCS(s))
  96 #define Ustrncat(s,t,n)    strncat(CS(s),CCS(t),n)
  97 #define Ustrncmp(s,t,n)    strncmp(CCS(s),CCS(t),n)
  98 #define Ustrncpy(s,t,n)    strncpy(CS(s),CCS(t),n)
  99 #define Ustrpbrk(s,t)      strpbrk(CCS(s),CCS(t))
 100 #define Ustrrchr(s,n)      US strrchr(CCS(s),n)
 101 #define CUstrrchr(s,n)     CUS strrchr(CCS(s),n)
 102 #define Ustrspn(s,t)       strspn(CCS(s),CCS(t))
 103 #define Ustrstr(s,t)       US strstr(CCS(s),CCS(t))
 104 #define CUstrstr(s,t)      CUS strstr(CCS(s),CCS(t))
 105 #define Ustrtod(s,t)       strtod(CCS(s),CSS(t))
 106 #define Ustrtol(s,t,b)     strtol(CCS(s),CSS(t),b)
 107 #define Ustrtoul(s,t,b)    strtoul(CCS(s),CSS(t),b)
 108 #define Uunlink(s)         unlink(CCS(s))
 109 #endif
 110
 111 /* End of mytypes.h */