xref: /onnv-gate/usr/src/lib/libshell/common/include/lexstates.h (revision 4887)

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*           Copyright (c) 1982-2007 AT&T Knowledge Ventures            *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                      by AT&T Knowledge Ventures                      *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                  David Korn <dgk@research.att.com>                   *
*                                                                      *
***********************************************************************/
#pragma prototyped
#ifndef S_BREAK
#define S_BREAK	1	/* end of token */
#define S_EOF	2	/* end of buffer */
#define S_NL	3	/* new-line when not a token */
#define S_RES	4	/* first character of reserved word */
#define S_NAME	5	/* other identifier characters */
#define S_REG	6	/* non-special characters */
#define S_TILDE	7	/* first char is tilde */
#define S_PUSH	8
#define S_POP	9
#define S_BRACT	10
#define S_LIT	11	/* literal quote character */
#define S_NLTOK	12	/* new-line token */
#define S_OP	13	/* operator character */
#define S_PAT	14	/* pattern characters * and ? */
#define S_EPAT	15	/* pattern char when followed by ( */
#define S_EQ	16	/* assignment character */
#define S_COM	17	/* comment character */
#define S_MOD1	18	/* ${...} modifier character - old quoting */
#define S_MOD2	19	/* ${...} modifier character - new quoting */
#define S_ERR	20	/* invalid character in ${...} */
#define S_SPC1	21	/* special prefix characters after $ */
#define S_SPC2	22	/* special characters after $ */
#define S_DIG	23	/* digit character after $*/
#define S_ALP	24	/* alpahbetic character after $ */
#define S_LBRA	25	/* left brace after $ */
#define S_RBRA	26	/* right brace after $ */
#define S_PAR	27	/* set for $( */
#define S_ENDCH	28	/* macro expansion terminator */
#define S_SLASH	29	/* / character terminates ~ expansion  */
#define S_COLON	30	/* for character : */
#define S_LABEL	31	/* for goto label */
#define S_EDOL	32	/* ends $identifier */
#define S_BRACE	33	/* left brace */
#define S_DOT	34	/* . char */
#define S_META	35	/* | & ; < > inside ${...} reserved for future use */
#define S_SPACE	S_BREAK	/* IFS space characters */
#define S_DELIM	S_RES	/* IFS delimter characters */
#define S_MBYTE S_NAME	/* IFS first byte of multi-byte char */
#define S_BLNK	36	/* space or tab */
/* The following must be the highest numbered states */
#define S_QUOTE	37	/* double quote character */
#define S_GRAVE	38	/* old comsub character */
#define S_ESC	39	/* escape character */
#define S_DOL	40	/* $ subsitution character */
#define S_ESC2	41	/* escape character inside '...' */

/* These are the lexical state table names */
#define ST_BEGIN	0
#define ST_NAME		1
#define ST_NORM		2
#define ST_LIT		3
#define ST_QUOTE	4
#define ST_NESTED	5
#define ST_DOL		6
#define ST_BRACE	7
#define ST_DOLNAME	8
#define ST_MACRO	9
#define ST_QNEST	10
#define ST_NONE		11

#include "FEATURE/locale"

#if _hdr_wchar
#   include <wchar.h>
#   if _hdr_wctype
#       include <wctype.h>
#       undef  isalpha
#       define isalpha(x)      iswalpha(x)
#       if defined(iswblank) || _lib_iswblank
#           undef  isblank
#           define isblank(x)      iswblank(x)
#       else
#           if _lib_wctype && _lib_iswctype
#               define _lib_iswblank	-1
#               undef  isblank
#	        define isblank(x)	local_iswblank(x)
	        extern int		local_iswblank(wchar_t);
#           endif
#       endif
#   endif
#endif
#ifndef isblank
#   define isblank(x)      ((x)==' '||(x)=='\t')
#endif

#undef LEN
#if SHOPT_MULTIBYTE
    static int NXT, LEN;
#   define isaname(c)	((c)>0xff?isalpha(c): sh_lexstates[ST_NAME][(c)]==0)
#   define isaletter(c)	((c)>0xff?isalpha(c): sh_lexstates[ST_DOL][(c)]==S_ALP && (c)!='.')
#else
#   undef mbwide
#   define mbwide()	(0)
#   define LEN		1
#   define isaname(c)	(sh_lexstates[ST_NAME][c]==0)
#   define isaletter(c)	(sh_lexstates[ST_DOL][c]==S_ALP && (c)!='.')
#endif
#define STATE(s,c)  	(mbwide()?(c=fcmbstate(s,&NXT,&LEN),NXT):s[c=fcget()])
#define isadigit(c)	(sh_lexstates[ST_DOL][c]==S_DIG)
#define isastchar(c)	((c)=='@' || (c)=='*')
#define isexp(c)	(sh_lexstates[ST_MACRO][c]==S_PAT||(c)=='$'||(c)=='`')
#define ismeta(c)	(sh_lexstates[ST_NAME][c]==S_BREAK)

extern char *sh_lexstates[ST_NONE];
extern const char *sh_lexrstates[ST_NONE];
extern const char e_lexversion[];
extern const char e_lexspace[];
extern const char e_lexslash[];
extern const char e_lexlabignore[];
extern const char e_lexlabunknown[];
extern const char e_lexsyntax1[];
extern const char e_lexsyntax2[];
extern const char e_lexsyntax3[];
extern const char e_lexobsolete1[];
extern const char e_lexobsolete2[];
extern const char e_lexobsolete3[];
extern const char e_lexobsolete4[];
extern const char e_lexobsolete5[];
extern const char e_lexobsolete6[];
extern const char e_lexusebrace[];
extern const char e_lexusequote[];
extern const char e_lexescape[];
extern const char e_lexquote[];
extern const char e_lexnested[];
extern const char e_lexbadchar[];
extern const char e_lexlongquote[];
extern const char e_lexfuture[];
extern const char e_lexzerobyte[];
extern const char e_lexemptyfor[];
#endif