bin/ksh/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
  11 typedef struct source Source;
  12 struct 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
  51 typedef 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
 103 extern Source  *source;         /* yyparse/yylex source */
 104 extern YYSTYPE  yylval;         /* result from yylex */
 105 extern struct ioword *heres[HERES], **herep;
 106 extern char     ident[IDENT+1];
 107
 108 #define HISTORYSIZE     500     /* size of saved history */
 109
 110 extern char   **history;        /* saved commands */
 111 extern char   **histptr;        /* last history item */
 112 extern uint32_t histsize;       /* history size */
 113
 114 int     yylex(int);
 115 void    yyerror(const char *, ...)
 116             __attribute__((__noreturn__, __format__ (printf, 1, 2)));
 117 Source * pushs(int, Area *);
 118 void    set_prompt(int);
 119 void    pprompt(const char *, int);