syntax.c revision 4f6e8d7a00cbeda1e70cc15be9c4af1018bdad53 
1/*	$NetBSD: syntax.c,v 1.1 2004/01/17 17:38:12 dsl Exp $	*/
2
3#include "shell.h"
4#include "syntax.h"
5#include "parser.h"
6#include <limits.h>
7
8#if CWORD != 0
9#error initialisation assumes 'CWORD' is zero
10#endif
11
12#define ndx(ch) (ch + 1 - CHAR_MIN)
13#define set(ch, val) [ndx(ch)] = val,
14#define set_range(s, e, val) [ndx(s) ... ndx(e)] = val,
15
16/* syntax table used when not in quotes */
17const char basesyntax[257] = { CEOF,
18    set_range(CTL_FIRST, CTL_LAST, CCTL)
19    set('\n', CNL)
20    set('\\', CBACK)
21    set('\'', CSQUOTE)
22    set('"', CDQUOTE)
23    set('`', CBQUOTE)
24    set('$', CVAR)
25    set('}', CENDVAR)
26    set('<', CSPCL)
27    set('>', CSPCL)
28    set('(', CSPCL)
29    set(')', CSPCL)
30    set(';', CSPCL)
31    set('&', CSPCL)
32    set('|', CSPCL)
33    set(' ', CSPCL)
34    set('\t', CSPCL)
35};
36
37/* syntax table used when in double quotes */
38const char dqsyntax[257] = { CEOF,
39    set_range(CTL_FIRST, CTL_LAST, CCTL)
40    set('\n', CNL)
41    set('\\', CBACK)
42    set('"', CDQUOTE)
43    set('`', CBQUOTE)
44    set('$', CVAR)
45    set('}', CENDVAR)
46    /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
47    set('!', CCTL)
48    set('*', CCTL)
49    set('?', CCTL)
50    set('[', CCTL)
51    set('=', CCTL)
52    set('~', CCTL)
53    set(':', CCTL)
54    set('/', CCTL)
55    set('-', CCTL)
56};
57
58/* syntax table used when in single quotes */
59const char sqsyntax[257] = { CEOF,
60    set_range(CTL_FIRST, CTL_LAST, CCTL)
61    set('\n', CNL)
62    set('\'', CSQUOTE)
63    /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
64    set('!', CCTL)
65    set('*', CCTL)
66    set('?', CCTL)
67    set('[', CCTL)
68    set('=', CCTL)
69    set('~', CCTL)
70    set(':', CCTL)
71    set('/', CCTL)
72    set('-', CCTL)
73};
74
75/* syntax table used when in arithmetic */
76const char arisyntax[257] = { CEOF,
77    set_range(CTL_FIRST, CTL_LAST, CCTL)
78    set('\n', CNL)
79    set('\\', CBACK)
80    set('`', CBQUOTE)
81    set('\'', CSQUOTE)
82    set('"', CDQUOTE)
83    set('$', CVAR)
84    set('}', CENDVAR)
85    set('(', CLP)
86    set(')', CRP)
87};
88
89/* character classification table */
90const char is_type[257] = { 0,
91    set_range('0', '9', ISDIGIT)
92    set_range('a', 'z', ISLOWER)
93    set_range('A', 'Z', ISUPPER)
94    set('_', ISUNDER)
95    set('#', ISSPECL)
96    set('?', ISSPECL)
97    set('$', ISSPECL)
98    set('!', ISSPECL)
99    set('-', ISSPECL)
100    set('*', ISSPECL)
101    set('@', ISSPECL)
102};
103