c83568a7dc
possibilities that we do not currently handle all that well. This mostly means (for now) making sure that quoted pattern magic characters (as well as quoted sh syntax magic chars) are properly marked, so they remain known as being quoted, and do not turn into pattern magic. Also, make sure that an unquoted \ in a pattern always quotes whatever comes next (which, unlike in regular expressions, includes inside [] matches),
112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
/* $NetBSD: syntax.c,v 1.6 2018/07/20 22:47:26 kre Exp $ */
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: syntax.c,v 1.6 2018/07/20 22:47:26 kre Exp $");
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#include <limits.h>
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#include "shell.h"
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#include "syntax.h"
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#include "parser.h"
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#if CWORD != 0
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#error initialisation assumes 'CWORD' is zero
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#endif
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#define ndx(ch) (ch + 1 - CHAR_MIN)
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#define set(ch, val) [ndx(ch)] = val,
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#define set_range(s, e, val) [ndx(s) ... ndx(e)] = val,
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/* syntax table used when not in quotes */
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const char basesyntax[257] = { CEOF,
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set_range(CTL_FIRST, CTL_LAST, CCTL)
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set('\n', CNL)
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set('\\', CBACK)
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set('\'', CSQUOTE)
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set('"', CDQUOTE)
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set('`', CBQUOTE)
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set('$', CVAR)
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set('}', CENDVAR)
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set('<', CSPCL)
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set('>', CSPCL)
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set('(', CSPCL)
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set(')', CSPCL)
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set(';', CSPCL)
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set('&', CSPCL)
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set('|', CSPCL)
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set(' ', CSPCL)
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set('\t', CSPCL)
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};
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/* syntax table used when in double quotes */
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const char dqsyntax[257] = { CEOF,
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set_range(CTL_FIRST, CTL_LAST, CCTL)
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set('\n', CNL)
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set('\\', CBACK)
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set('"', CDQUOTE)
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set('`', CBQUOTE)
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set('$', CVAR)
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set('}', CENDVAR)
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/* ':/' for tilde expansion, '-]' for [a\-x] pattern ranges */
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set('!', CCTL)
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set('*', CCTL)
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set('?', CCTL)
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set('[', CCTL)
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set('=', CCTL)
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set('~', CCTL)
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set(':', CCTL)
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set('/', CCTL)
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set('-', CCTL)
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set(']', CCTL)
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};
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/* syntax table used when in single quotes */
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const char sqsyntax[257] = { CEOF,
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set_range(CTL_FIRST, CTL_LAST, CCTL)
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set('\n', CNL)
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set('\'', CSQUOTE)
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set('\\', CSBACK)
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/* ':/' for tilde expansion, '-]' for [a\-x] pattern ranges */
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set('!', CCTL)
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set('*', CCTL)
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set('?', CCTL)
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set('[', CCTL)
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set('=', CCTL)
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set('~', CCTL)
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set(':', CCTL)
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set('/', CCTL)
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set('-', CCTL)
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set(']', CCTL)
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};
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/* syntax table used when in arithmetic */
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const char arisyntax[257] = { CEOF,
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set_range(CTL_FIRST, CTL_LAST, CCTL)
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set('\n', CNL)
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set('\\', CBACK)
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set('`', CBQUOTE)
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set('\'', CSQUOTE)
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set('"', CDQUOTE)
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set('$', CVAR)
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set('}', CENDVAR)
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set('(', CLP)
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set(')', CRP)
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};
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/* character classification table */
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const char is_type[257] = { 0,
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set_range('0', '9', ISDIGIT)
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set_range('a', 'z', ISLOWER)
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set_range('A', 'Z', ISUPPER)
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set('_', ISUNDER)
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set('#', ISSPECL)
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set('?', ISSPECL)
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set('$', ISSPECL)
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set('!', ISSPECL)
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set('-', ISSPECL)
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set('*', ISSPECL)
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set('@', ISSPECL)
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set(' ', ISSPACE)
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set('\t', ISSPACE)
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set('\n', ISSPACE)
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};
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