src/ascii.h

   1 /* vi:set ts=8 sts=4 sw=4:
   2  *
   3  * VIM - Vi IMproved    by Bram Moolenaar
   4  *
   5  * Do ":help uganda"  in Vim to read copying and usage conditions.
   6  * Do ":help credits" in Vim to see a list of people who contributed.
   7  */
   8
   9 /*
  10  * Definitions of various common control characters.
  11  * For EBCDIC we have to use different values.
  12  */
  13
  14 #ifndef EBCDIC
  15
  16 /* IF_EB(ASCII_constant, EBCDIC_constant) */
  17 #define IF_EB(a, b)     a
  18
  19 #define CharOrd(x)      ((x) < 'a' ? (x) - 'A' : (x) - 'a')
  20 #define CharOrdLow(x)   ((x) - 'a')
  21 #define CharOrdUp(x)    ((x) - 'A')
  22 #define ROT13(c, a)     (((((c) - (a)) + 13) % 26) + (a))
  23
  24 #define NUL             '\000'
  25 #define BELL            '\007'
  26 #define BS              '\010'
  27 #define TAB             '\011'
  28 #define NL              '\012'
  29 #define NL_STR          (char_u *)"\012"
  30 #define FF              '\014'
  31 #define CAR             '\015'  /* CR is used by Mac OS X */
  32 #define ESC             '\033'
  33 #define ESC_STR         (char_u *)"\033"
  34 #define ESC_STR_nc      "\033"
  35 #define DEL             0x7f
  36 #define DEL_STR         (char_u *)"\177"
  37 #define CSI             0x9b    /* Control Sequence Introducer */
  38 #define CSI_STR         "\233"
  39 #define DCS             0x90    /* Device Control String */
  40 #define STERM           0x9c    /* String Terminator */
  41
  42 #define POUND           0xA3
  43
  44 #define Ctrl_chr(x)     (TOUPPER_ASC(x) ^ 0x40) /* '?' -> DEL, '@' -> ^@, etc. */
  45 #define Meta(x)         ((x) | 0x80)
  46
  47 #define CTRL_F_STR      "\006"
  48 #define CTRL_H_STR      "\010"
  49 #define CTRL_V_STR      "\026"
  50
  51 #define Ctrl_AT         0   /* @ */
  52 #define Ctrl_A          1
  53 #define Ctrl_B          2
  54 #define Ctrl_C          3
  55 #define Ctrl_D          4
  56 #define Ctrl_E          5
  57 #define Ctrl_F          6
  58 #define Ctrl_G          7
  59 #define Ctrl_H          8
  60 #define Ctrl_I          9
  61 #define Ctrl_J          10
  62 #define Ctrl_K          11
  63 #define Ctrl_L          12
  64 #define Ctrl_M          13
  65 #define Ctrl_N          14
  66 #define Ctrl_O          15
  67 #define Ctrl_P          16
  68 #define Ctrl_Q          17
  69 #define Ctrl_R          18
  70 #define Ctrl_S          19
  71 #define Ctrl_T          20
  72 #define Ctrl_U          21
  73 #define Ctrl_V          22
  74 #define Ctrl_W          23
  75 #define Ctrl_X          24
  76 #define Ctrl_Y          25
  77 #define Ctrl_Z          26
  78                             /* CTRL- [ Left Square Bracket == ESC*/
  79 #define Ctrl_BSL        28  /* \ BackSLash */
  80 #define Ctrl_RSB        29  /* ] Right Square Bracket */
  81 #define Ctrl_HAT        30  /* ^ */
  82 #define Ctrl__          31
  83
  84 #else
  85
  86 /* EBCDIC */
  87
  88 /* IF_EB(ASCII_constant, EBCDIC_constant) */
  89 #define IF_EB(a, b)     b
  90
  91 /*
  92  * Finding the position in the alphabet is not straightforward in EBCDIC.
  93  * There are gaps in the code table.
  94  * 'a' + 1 == 'b', but: 'i' + 7 == 'j' and 'r' + 8 == 's'
  95  */
  96 #define CharOrd__(c) ((c) < ('j' - 'a') ? (c) : ((c) < ('s' - 'a') ? (c) - 7 : (c) - 7 - 8))
  97 #define CharOrdLow(x) (CharOrd__((x) - 'a'))
  98 #define CharOrdUp(x) (CharOrd__((x) - 'A'))
  99 #define CharOrd(x) (isupper(x) ? CharOrdUp(x) : CharOrdLow(x))
 100
 101 #define EBCDIC_CHAR_ADD_(x) ((x) < 0?'a':(x)>25?'z':"abcdefghijklmnopqrstuvwxyz"[x])
 102 #define EBCDIC_CHAR_ADD(c,s) (isupper(c) ? toupper(EBCDIC_CHAR_ADD_(CharOrdUp(c)+(s))) : EBCDIC_CHAR_ADD_(CharOrdLow(c)+(s)))
 103
 104 #define R13_(c) ("abcdefghijklmnopqrstuvwxyz"[((c) + 13) % 26])
 105 #define ROT13(c, a)  (isupper(c) ? toupper(R13_(CharOrdUp(c))) : R13_(CharOrdLow(c)))
 106
 107 #define NUL             '\000'
 108 #define BELL            '\x2f'
 109 #define BS              '\x16'
 110 #define TAB             '\x05'
 111 #define NL              '\x15'
 112 #define NL_STR          (char_u *)"\x15"
 113 #define FF              '\x0C'
 114 #define CAR             '\x0D'
 115 #define ESC             '\x27'
 116 #define ESC_STR         (char_u *)"\x27"
 117 #define ESC_STR_nc      "\x27"
 118 #define DEL             0x07
 119 #define DEL_STR         (char_u *)"\007"
 120 /* TODO: EBCDIC Code page dependent (here 1047) */
 121 #define CSI             0x9b    /* Control Sequence Introducer */
 122 #define CSI_STR         "\233"
 123 #define DCS             0x90    /* Device Control String */
 124 #define STERM           0x9c    /* String Terminator */
 125
 126 #define POUND           '£'
 127
 128 #define CTRL_F_STR      "\056"
 129 #define CTRL_H_STR      "\026"
 130 #define CTRL_V_STR      "\062"
 131
 132 #define Ctrl_AT         0x00   /* @ */
 133 #define Ctrl_A          0x01
 134 #define Ctrl_B          0x02
 135 #define Ctrl_C          0x03
 136 #define Ctrl_D          0x37
 137 #define Ctrl_E          0x2D
 138 #define Ctrl_F          0x2E
 139 #define Ctrl_G          0x2F
 140 #define Ctrl_H          0x16
 141 #define Ctrl_I          0x05
 142 #define Ctrl_J          0x15
 143 #define Ctrl_K          0x0B
 144 #define Ctrl_L          0x0C
 145 #define Ctrl_M          0x0D
 146 #define Ctrl_N          0x0E
 147 #define Ctrl_O          0x0F
 148 #define Ctrl_P          0x10
 149 #define Ctrl_Q          0x11
 150 #define Ctrl_R          0x12
 151 #define Ctrl_S          0x13
 152 #define Ctrl_T          0x3C
 153 #define Ctrl_U          0x3D
 154 #define Ctrl_V          0x32
 155 #define Ctrl_W          0x26
 156 #define Ctrl_X          0x18
 157 #define Ctrl_Y          0x19
 158 #define Ctrl_Z          0x3F
 159                             /* CTRL- [ Left Square Bracket == ESC*/
 160 #define Ctrl_RSB        0x1D  /* ] Right Square Bracket */
 161 #define Ctrl_BSL        0x1C  /* \ BackSLash */
 162 #define Ctrl_HAT        0x1E  /* ^ */
 163 #define Ctrl__          0x1F
 164
 165 #define Ctrl_chr(x)     (CtrlTable[(x)])
 166 extern char CtrlTable[];
 167
 168 #define CtrlChar(x)     ((x < ' ') ? CtrlCharTable[(x)] : 0)
 169 extern char CtrlCharTable[];
 170
 171 #define MetaChar(x)     ((x < ' ') ? MetaCharTable[(x)] : 0)
 172 extern char MetaCharTable[];
 173
 174 #endif /* defined EBCDIC */
 175
 176 /*
 177  * Character that separates dir names in a path.
 178  * For MS-DOS, WIN32 and OS/2 we use a backslash.  A slash mostly works
 179  * fine, but there are places where it doesn't (e.g. in a command name).
 180  * For Acorn we use a dot.
 181  */
 182 #ifdef BACKSLASH_IN_FILENAME
 183 # define PATHSEP        psepc
 184 # define PATHSEPSTR     pseps
 185 #else
 186 # ifdef RISCOS
 187 #  define PATHSEP       '.'
 188 #  define PATHSEPSTR    "."
 189 # else
 190 #  define PATHSEP       '/'
 191 #  define PATHSEPSTR    "/"
 192 # endif
 193 #endif