blob: bca6446d2686b8570abf6b8b01e694e18d722987 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/* $OpenBSD: lex.h,v 1.3 1996/10/13 21:32:20 downsj Exp $ */
/*
* Source input, lexer and parser
*/
/* $From: lex.h,v 1.4 1994/05/31 13:34:34 michael Exp $ */
#define IDENT 64
typedef struct source Source;
struct source {
const char *str; /* input pointer */
int type; /* input type */
char const *start; /* start of current buffer */
union {
char **strv; /* string [] */
struct shf *shf; /* shell file */
struct tbl *tblp; /* alias (SALIAS) */
char *freeme; /* also for SREREAD */
} u;
char ugbuf[2]; /* buffer for ungetsc() (SREREAD) and
* alias (SALIAS) */
int line; /* line number */
int errline; /* line the error occured on (0 if not set) */
const char *file; /* input file name */
int flags; /* SF_* */
Area *areap;
XString xs; /* input buffer */
Source *next; /* stacked source */
};
/* Source.type values */
#define SEOF 0 /* input EOF */
#define SFILE 1 /* file input */
#define SSTDIN 2 /* read stdin */
#define SSTRING 3 /* string */
#define SWSTR 4 /* string without \n */
#define SWORDS 5 /* string[] */
#define SWORDSEP 6 /* string[] seperator */
#define SALIAS 7 /* alias expansion */
#define SREREAD 8 /* read ahead to be re-scanned */
/* Source.flags values */
#define SF_ECHO BIT(0) /* echo input to shlout */
#define SF_ALIAS BIT(1) /* faking space at end of alias */
#define SF_ALIASEND BIT(2) /* faking space at end of alias */
#define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */
/*
* states while lexing word
*/
#define SBASE 0 /* outside any lexical constructs */
#define SWORD 1 /* implicit quoting for substitute() */
#ifdef KSH
#define SDPAREN 2 /* inside (( )), implicit quoting */
#endif /* KSH */
#define SSQUOTE 3 /* inside '' */
#define SDQUOTE 4 /* inside "" */
#define SBRACE 5 /* inside ${} */
#define SPAREN 6 /* inside $() */
#define SBQUOTE 7 /* inside `` */
#define SDDPAREN 8 /* inside $(( )) */
#define SHEREDELIM 9 /* parsing <<,<<- delimiter */
#define SHEREDQUOTE 10 /* parsing " in <<,<<- delimiter */
#define SPATTERN 11 /* parsing *(...|...) pattern (*+?@!) */
#define STBRACE 12 /* parsing ${..[#%]..} */
typedef union {
int i;
char *cp;
char **wp;
struct op *o;
struct ioword *iop;
} YYSTYPE;
/* If something is added here, add it to tokentab[] in syn.c as well */
#define LWORD 256
#define LOGAND 257 /* && */
#define LOGOR 258 /* || */
#define BREAK 259 /* ;; */
#define IF 260
#define THEN 261
#define ELSE 262
#define ELIF 263
#define FI 264
#define CASE 265
#define ESAC 266
#define FOR 267
#define SELECT 268
#define WHILE 269
#define UNTIL 270
#define DO 271
#define DONE 272
#define IN 273
#define FUNCTION 274
#define TIME 275
#define REDIR 276
#ifdef KSH
#define MDPAREN 277 /* (( )) */
#endif /* KSH */
#define BANG 278 /* ! */
#define DBRACKET 279 /* [[ .. ]] */
#define COPROC 280 /* |& */
#define YYERRCODE 300
/* flags to yylex */
#define CONTIN BIT(0) /* skip new lines to complete command */
#define ONEWORD BIT(1) /* single word for substitute() */
#define ALIAS BIT(2) /* recognize alias */
#define KEYWORD BIT(3) /* recognize keywords */
#define LETEXPR BIT(4) /* get expression inside (( )) */
#define VARASN BIT(5) /* check for var=word */
#define ARRAYVAR BIT(6) /* parse x[1 & 2] as one word */
#define ESACONLY BIT(7) /* only accept esac keyword */
#define CMDWORD BIT(8) /* parsing simple command (alias related) */
#define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */
#define HERES 10 /* max << in line */
EXTERN Source *source; /* yyparse/yylex source */
EXTERN YYSTYPE yylval; /* result from yylex */
EXTERN int yynerrs;
EXTERN struct ioword *heres [HERES], **herep;
EXTERN char ident [IDENT+1];
#ifdef HISTORY
# define HISTORYSIZE 128 /* size of saved history */
EXTERN char **history; /* saved commands */
EXTERN char **histptr; /* last history item */
EXTERN int histsize; /* history size */
#endif /* HISTORY */
|
