src/sys2.h

   1 /* WARNING -- this file is temporary.  It is shared between the
   2    sh-utils, fileutils, and textutils packages.  Once I find a little
   3    more time, I'll merge the remaining things in system.h and everything
   4    in this file will go back there. */
   5
   6 #ifndef RETSIGTYPE
   7 # define RETSIGTYPE void
   8 #endif
   9
  10 #ifndef __GNUC__
  11 # ifdef HAVE_ALLOCA_H
  12 #  include <alloca.h>
  13 # else
  14 #  ifdef _AIX
  15  #  pragma alloca
  16 #  else
  17 #   ifdef _WIN32
  18 #    include <malloc.h>
  19 #    include <io.h>
  20 #   else
  21 #    ifndef alloca
  22 char *alloca ();
  23 #    endif
  24 #   endif
  25 #  endif
  26 # endif
  27 #endif
  28
  29 #include <ctype.h>
  30
  31 /* Jim Meyering writes:
  32
  33    "... Some ctype macros are valid only for character codes that
  34    isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when
  35    using /bin/cc or gcc but without giving an ansi option).  So, all
  36    ctype uses should be through macros like ISPRINT...  If
  37    STDC_HEADERS is defined, then autoconf has verified that the ctype
  38    macros don't need to be guarded with references to isascii. ...
  39    Defining isascii to 1 should let any compiler worth its salt
  40    eliminate the && through constant folding."
  41
  42    Bruno Haible adds:
  43
  44    "... Furthermore, isupper(c) etc. have an undefined result if c is
  45    outside the range -1 <= c <= 255. One is tempted to write isupper(c)
  46    with c being of type `char', but this is wrong if c is an 8-bit
  47    character >= 128 which gets sign-extended to a negative value.
  48    The macro ISUPPER protects against this as well."  */
  49
  50 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
  51 # define IN_CTYPE_DOMAIN(c) 1
  52 #else
  53 # define IN_CTYPE_DOMAIN(c) isascii(c)
  54 #endif
  55
  56 #ifdef isblank
  57 # define ISBLANK(c) (IN_CTYPE_DOMAIN (c) && isblank (c))
  58 #else
  59 # define ISBLANK(c) ((c) == ' ' || (c) == '\t')
  60 #endif
  61 #ifdef isgraph
  62 # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isgraph (c))
  63 #else
  64 # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isprint (c) && !isspace (c))
  65 #endif
  66
  67 #define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
  68 #define ISALNUM(c) (IN_CTYPE_DOMAIN (c) && isalnum (c))
  69 #define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
  70 #define ISCNTRL(c) (IN_CTYPE_DOMAIN (c) && iscntrl (c))
  71 #define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower (c))
  72 #define ISPUNCT(c) (IN_CTYPE_DOMAIN (c) && ispunct (c))
  73 #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
  74 #define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c))
  75 #define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit (c))
  76 #define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))
  77
  78 /* ISDIGIT differs from ISDIGIT_LOCALE, as follows:
  79    - Its arg may be any int or unsigned int; it need not be an unsigned char.
  80    - It's guaranteed to evaluate its argument exactly once.
  81    - It's typically faster.
  82    Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
  83    only '0' through '9' are digits.  Prefer ISDIGIT to ISDIGIT_LOCALE unless
  84    it's important to use the locale's definition of `digit' even when the
  85    host does not conform to Posix.  */
  86 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
  87
  88 #ifndef PARAMS
  89 # if PROTOTYPES
  90 #  define PARAMS(Args) Args
  91 # else
  92 #  define PARAMS(Args) ()
  93 # endif
  94 #endif
  95
  96 /* Take care of NLS matters.  */
  97
  98 #if HAVE_LOCALE_H
  99 # include <locale.h>
 100 #endif
 101 #if !HAVE_SETLOCALE
 102 # define setlocale(Category, Locale) /* empty */
 103 #endif
 104
 105 #if ENABLE_NLS
 106 # include <libintl.h>
 107 # define _(Text) gettext (Text)
 108 #else
 109 # undef bindtextdomain
 110 # define bindtextdomain(Domain, Directory) /* empty */
 111 # undef textdomain
 112 # define textdomain(Domain) /* empty */
 113 # define _(Text) Text
 114 #endif
 115 #define N_(Text) Text
 116
 117 #define STREQ(a,b) (strcmp((a), (b)) == 0)
 118
 119 #ifndef HAVE_DECL_FREE
 120 void free ();
 121 #endif
 122
 123 #ifndef HAVE_DECL_MALLOC
 124 char *malloc ();
 125 #endif
 126
 127 #ifndef HAVE_DECL_MEMCHR
 128 char *memchr ();
 129 #endif
 130
 131 #ifndef HAVE_DECL_REALLOC
 132 char *realloc ();
 133 #endif
 134
 135 #ifndef HAVE_DECL_STPCPY
 136 # ifndef stpcpy
 137 char *stpcpy ();
 138 # endif
 139 #endif
 140
 141 #ifndef HAVE_DECL_STRSTR
 142 char *strstr ();
 143 #endif
 144
 145 #ifndef HAVE_DECL_GETENV
 146 char *getenv ();
 147 #endif
 148
 149 #ifndef HAVE_DECL_LSEEK
 150 off_t lseek ();
 151 #endif
 152
 153 #include "xalloc.h"
 154
 155 #ifndef HAVE_MEMPCPY
 156 /* Be CAREFUL that there are no side effects in N.  */
 157 # define mempcpy(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N)))
 158 #endif