bin/sh/syntax.c

   1 /*      $NetBSD: syntax.c,v 1.3 2012/03/28 20:11:25 christos Exp $      */
   2
   3 #include <sys/cdefs.h>
   4 __RCSID("$NetBSD: syntax.c,v 1.3 2012/03/28 20:11:25 christos Exp $");
   5
   6 #include <limits.h>
   7 #include "shell.h"
   8 #include "syntax.h"
   9 #include "parser.h"
  10
  11 #if CWORD != 0
  12 #error initialisation assumes 'CWORD' is zero
  13 #endif
  14
  15 #define ndx(ch) (ch + 1 - CHAR_MIN)
  16 #define set(ch, val) [ndx(ch)] = val,
  17 #define set_range(s, e, val) [ndx(s) ... ndx(e)] = val,
  18
  19 /* syntax table used when not in quotes */
  20 const char basesyntax[257] = { CEOF,
  21     set_range(CTL_FIRST, CTL_LAST, CCTL)
  22     set('\n', CNL)
  23     set('\\', CBACK)
  24     set('\'', CSQUOTE)
  25     set('"', CDQUOTE)
  26     set('`', CBQUOTE)
  27     set('$', CVAR)
  28     set('}', CENDVAR)
  29     set('<', CSPCL)
  30     set('>', CSPCL)
  31     set('(', CSPCL)
  32     set(')', CSPCL)
  33     set(';', CSPCL)
  34     set('&', CSPCL)
  35     set('|', CSPCL)
  36     set(' ', CSPCL)
  37     set('\t', CSPCL)
  38 };
  39
  40 /* syntax table used when in double quotes */
  41 const char dqsyntax[257] = { CEOF,
  42     set_range(CTL_FIRST, CTL_LAST, CCTL)
  43     set('\n', CNL)
  44     set('\\', CBACK)
  45     set('"', CDQUOTE)
  46     set('`', CBQUOTE)
  47     set('$', CVAR)
  48     set('}', CENDVAR)
  49     /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
  50     set('!', CCTL)
  51     set('*', CCTL)
  52     set('?', CCTL)
  53     set('[', CCTL)
  54     set('=', CCTL)
  55     set('~', CCTL)
  56     set(':', CCTL)
  57     set('/', CCTL)
  58     set('-', CCTL)
  59 };
  60
  61 /* syntax table used when in single quotes */
  62 const char sqsyntax[257] = { CEOF,
  63     set_range(CTL_FIRST, CTL_LAST, CCTL)
  64     set('\n', CNL)
  65     set('\'', CSQUOTE)
  66     /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
  67     set('!', CCTL)
  68     set('*', CCTL)
  69     set('?', CCTL)
  70     set('[', CCTL)
  71     set('=', CCTL)
  72     set('~', CCTL)
  73     set(':', CCTL)
  74     set('/', CCTL)
  75     set('-', CCTL)
  76 };
  77
  78 /* syntax table used when in arithmetic */
  79 const char arisyntax[257] = { CEOF,
  80     set_range(CTL_FIRST, CTL_LAST, CCTL)
  81     set('\n', CNL)
  82     set('\\', CBACK)
  83     set('`', CBQUOTE)
  84     set('\'', CSQUOTE)
  85     set('"', CDQUOTE)
  86     set('$', CVAR)
  87     set('}', CENDVAR)
  88     set('(', CLP)
  89     set(')', CRP)
  90 };
  91
  92 /* character classification table */
  93 const char is_type[257] = { 0,
  94     set_range('0', '9', ISDIGIT)
  95     set_range('a', 'z', ISLOWER)
  96     set_range('A', 'Z', ISUPPER)
  97     set('_', ISUNDER)
  98     set('#', ISSPECL)
  99     set('?', ISSPECL)
 100     set('$', ISSPECL)
 101     set('!', ISSPECL)
 102     set('-', ISSPECL)
 103     set('*', ISSPECL)
 104     set('@', ISSPECL)
 105 };