lex.h
1/* $OpenBSD: lex.h,v 1.21 2018/01/15 14:58:05 jca Exp $ */
2
3/*
4 * Source input, lexer and parser
5 */
6
7/* $From: lex.h,v 1.4 1994/05/31 13:34:34 michael Exp $ */
8
9#define IDENT 64
10
11typedef struct source Source;
12struct source {
13 const char *str; /* input pointer */
14 int type; /* input type */
15 const char *start; /* start of current buffer */
16 union {
17 char **strv; /* string [] */
18 struct shf *shf; /* shell file */
19 struct tbl *tblp; /* alias (SALIAS) */
20 char *freeme; /* also for SREREAD */
21 } u;
22 char ugbuf[2]; /* buffer for ungetsc() (SREREAD) and
23 * alias (SALIAS) */
24 int line; /* line number */
25 int cmd_offset; /* line number - command number */
26 int errline; /* line the error occurred on (0 if not set) */
27 const char *file; /* input file name */
28 int flags; /* SF_* */
29 Area *areap;
30 XString xs; /* input buffer */
31 Source *next; /* stacked source */
32};
33
34/* Source.type values */
35#define SEOF 0 /* input EOF */
36#define SFILE 1 /* file input */
37#define SSTDIN 2 /* read stdin */
38#define SSTRING 3 /* string */
39#define SWSTR 4 /* string without \n */
40#define SWORDS 5 /* string[] */
41#define SWORDSEP 6 /* string[] separator */
42#define SALIAS 7 /* alias expansion */
43#define SREREAD 8 /* read ahead to be re-scanned */
44
45/* Source.flags values */
46#define SF_ECHO BIT(0) /* echo input to shlout */
47#define SF_ALIAS BIT(1) /* faking space at end of alias */
48#define SF_ALIASEND BIT(2) /* faking space at end of alias */
49#define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */
50
51typedef union {
52 int i;
53 char *cp;
54 char **wp;
55 struct op *o;
56 struct ioword *iop;
57} YYSTYPE;
58
59/* If something is added here, add it to tokentab[] in syn.c as well */
60#define LWORD 256
61#define LOGAND 257 /* && */
62#define LOGOR 258 /* || */
63#define BREAK 259 /* ;; */
64#define IF 260
65#define THEN 261
66#define ELSE 262
67#define ELIF 263
68#define FI 264
69#define CASE 265
70#define ESAC 266
71#define FOR 267
72#define SELECT 268
73#define WHILE 269
74#define UNTIL 270
75#define DO 271
76#define DONE 272
77#define IN 273
78#define FUNCTION 274
79#define TIME 275
80#define REDIR 276
81#define MDPAREN 277 /* (( )) */
82#define BANG 278 /* ! */
83#define DBRACKET 279 /* [[ .. ]] */
84#define COPROC 280 /* |& */
85#define YYERRCODE 300
86
87/* flags to yylex */
88#define CONTIN BIT(0) /* skip new lines to complete command */
89#define ONEWORD BIT(1) /* single word for substitute() */
90#define ALIAS BIT(2) /* recognize alias */
91#define KEYWORD BIT(3) /* recognize keywords */
92#define LETEXPR BIT(4) /* get expression inside (( )) */
93#define VARASN BIT(5) /* check for var=word */
94#define ARRAYVAR BIT(6) /* parse x[1 & 2] as one word */
95#define ESACONLY BIT(7) /* only accept esac keyword */
96#define CMDWORD BIT(8) /* parsing simple command (alias related) */
97#define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */
98#define HEREDOC BIT(10) /* parsing heredoc */
99#define UNESCAPE BIT(11) /* remove backslashes */
100
101#define HERES 10 /* max << in line */
102
103extern Source *source; /* yyparse/yylex source */
104extern YYSTYPE yylval; /* result from yylex */
105extern struct ioword *heres[HERES], **herep;
106extern char ident[IDENT+1];
107
108#define HISTORYSIZE 500 /* size of saved history */
109
110extern char **history; /* saved commands */
111extern char **histptr; /* last history item */
112extern uint32_t histsize; /* history size */
113
114int yylex(int);
115void yyerror(const char *, ...)
116 __attribute__((__noreturn__, __format__ (printf, 1, 2)));
117Source * pushs(int, Area *);
118void set_prompt(int);
119void pprompt(const char *, int);
