bin/sh/syntax.c

   1 /*      $NetBSD: syntax.c,v 1.1 2004/01/17 17:38:12 dsl Exp $   */
   2
   3 #include <sys/cdefs.h>
   4 __RCSID("$NetBSD$");
   5
   6 #include "shell.h"
   7 #include "syntax.h"
   8 #include "parser.h"
   9
  10 #if CWORD != 0
  11 #error initialisation assumes 'CWORD' is zero
  12 #endif
  13
  14 #define ndx(ch) (ch + 1 - CHAR_MIN)
  15 #define set(ch, val) [ndx(ch)] = val,
  16 #define set_range(s, e, val) [ndx(s) ... ndx(e)] = val,
  17
  18 /* syntax table used when not in quotes */
  19 const char basesyntax[257] = { CEOF,
  20     set_range(CTL_FIRST, CTL_LAST, CCTL)
  21     set('\n', CNL)
  22     set('\\', CBACK)
  23     set('\'', CSQUOTE)
  24     set('"', CDQUOTE)
  25     set('`', CBQUOTE)
  26     set('$', CVAR)
  27     set('}', CENDVAR)
  28     set('<', CSPCL)
  29     set('>', CSPCL)
  30     set('(', CSPCL)
  31     set(')', CSPCL)
  32     set(';', CSPCL)
  33     set('&', CSPCL)
  34     set('|', CSPCL)
  35     set(' ', CSPCL)
  36     set('\t', CSPCL)
  37 };
  38
  39 /* syntax table used when in double quotes */
  40 const char dqsyntax[257] = { CEOF,
  41     set_range(CTL_FIRST, CTL_LAST, CCTL)
  42     set('\n', CNL)
  43     set('\\', CBACK)
  44     set('"', CDQUOTE)
  45     set('`', CBQUOTE)
  46     set('$', CVAR)
  47     set('}', CENDVAR)
  48     /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
  49     set('!', CCTL)
  50     set('*', CCTL)
  51     set('?', CCTL)
  52     set('[', CCTL)
  53     set('=', CCTL)
  54     set('~', CCTL)
  55     set(':', CCTL)
  56     set('/', CCTL)
  57     set('-', CCTL)
  58 };
  59
  60 /* syntax table used when in single quotes */
  61 const char sqsyntax[257] = { CEOF,
  62     set_range(CTL_FIRST, CTL_LAST, CCTL)
  63     set('\n', CNL)
  64     set('\'', CSQUOTE)
  65     /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
  66     set('!', CCTL)
  67     set('*', CCTL)
  68     set('?', CCTL)
  69     set('[', CCTL)
  70     set('=', CCTL)
  71     set('~', CCTL)
  72     set(':', CCTL)
  73     set('/', CCTL)
  74     set('-', CCTL)
  75 };
  76
  77 /* syntax table used when in arithmetic */
  78 const char arisyntax[257] = { CEOF,
  79     set_range(CTL_FIRST, CTL_LAST, CCTL)
  80     set('\n', CNL)
  81     set('\\', CBACK)
  82     set('`', CBQUOTE)
  83     set('\'', CSQUOTE)
  84     set('"', CDQUOTE)
  85     set('$', CVAR)
  86     set('}', CENDVAR)
  87     set('(', CLP)
  88     set(')', CRP)
  89 };
  90
  91 /* character classification table */
  92 const char is_type[257] = { 0,
  93     set_range('0', '9', ISDIGIT)
  94     set_range('a', 'z', ISLOWER)
  95     set_range('A', 'Z', ISUPPER)
  96     set('_', ISUNDER)
  97     set('#', ISSPECL)
  98     set('?', ISSPECL)
  99     set('$', ISSPECL)
 100     set('!', ISSPECL)
 101     set('-', ISSPECL)
 102     set('*', ISSPECL)
 103     set('@', ISSPECL)
 104 };