182 lines
5.8 KiB
C
182 lines
5.8 KiB
C
/* $NetBSD: table.h,v 1.3 1999/10/20 15:10:00 hubertf Exp $ */
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/*
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* generic hashed associative table for commands and variables.
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*/
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struct table {
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Area *areap; /* area to allocate entries */
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short size, nfree; /* hash size (always 2^^n), free entries */
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struct tbl **tbls; /* hashed table items */
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};
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struct tbl { /* table item */
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Tflag flag; /* flags */
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int type; /* command type (see below), base (if INTEGER),
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* or offset from val.s of value (if EXPORT) */
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Area *areap; /* area to allocate from */
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union {
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char *s; /* string */
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long i; /* integer */
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int (*f) ARGS((char **)); /* int function */
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struct op *t; /* "function" tree */
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} val; /* value */
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int index; /* index for an array */
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union {
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int field; /* field with for -L/-R/-Z */
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int errno_; /* CEXEC/CTALIAS */
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} u2;
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union {
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struct tbl *array; /* array values */
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char *fpath; /* temporary path to undef function */
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} u;
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char name[4]; /* name -- variable length */
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};
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/* common flag bits */
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#define ALLOC BIT(0) /* val.s has been allocated */
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#define DEFINED BIT(1) /* is defined in block */
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#define ISSET BIT(2) /* has value, vp->val.[si] */
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#define EXPORT BIT(3) /* exported variable/function */
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#define TRACE BIT(4) /* var: user flagged, func: execution tracing */
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/* (start non-common flags at 8) */
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/* flag bits used for variables */
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#define SPECIAL BIT(8) /* PATH, IFS, SECONDS, etc */
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#define INTEGER BIT(9) /* val.i contains integer value */
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#define RDONLY BIT(10) /* read-only variable */
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#define LOCAL BIT(11) /* for local typeset() */
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#define ARRAY BIT(13) /* array */
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#define LJUST BIT(14) /* left justify */
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#define RJUST BIT(15) /* right justify */
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#define ZEROFIL BIT(16) /* 0 filled if RJUSTIFY, strip 0s if LJUSTIFY */
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#define LCASEV BIT(17) /* convert to lower case */
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#define UCASEV_AL BIT(18)/* convert to upper case / autoload function */
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#define INT_U BIT(19) /* unsigned integer */
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#define INT_L BIT(20) /* long integer (no-op) */
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#define IMPORT BIT(21) /* flag to typeset(): no arrays, must have = */
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#define LOCAL_COPY BIT(22) /* with LOCAL - copy attrs from existing var */
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#define EXPRINEVAL BIT(23) /* contents currently being evaluated */
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#define EXPRLVALUE BIT(24) /* useable as lvalue (temp flag) */
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/* flag bits used for taliases/builtins/aliases/keywords/functions */
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#define KEEPASN BIT(8) /* keep command assignments (eg, var=x cmd) */
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#define FINUSE BIT(9) /* function being executed */
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#define FDELETE BIT(10) /* function deleted while it was executing */
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#define FKSH BIT(11) /* function defined with function x (vs x()) */
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#define SPEC_BI BIT(12) /* a POSIX special builtin */
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#define REG_BI BIT(13) /* a POSIX regular builtin */
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/* Attributes that can be set by the user (used to decide if an unset param
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* should be repoted by set/typeset). Does not include ARRAY or LOCAL.
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*/
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#define USERATTRIB (EXPORT|INTEGER|RDONLY|LJUST|RJUST|ZEROFIL\
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|LCASEV|UCASEV_AL|INT_U|INT_L)
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/* command types */
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#define CNONE 0 /* undefined */
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#define CSHELL 1 /* built-in */
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#define CFUNC 2 /* function */
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#define CEXEC 4 /* executable command */
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#define CALIAS 5 /* alias */
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#define CKEYWD 6 /* keyword */
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#define CTALIAS 7 /* tracked alias */
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/* Flags for findcom()/comexec() */
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#define FC_SPECBI BIT(0) /* special builtin */
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#define FC_FUNC BIT(1) /* function builtin */
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#define FC_REGBI BIT(2) /* regular builtin */
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#define FC_UNREGBI BIT(3) /* un-regular builtin (!special,!regular) */
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#define FC_BI (FC_SPECBI|FC_REGBI|FC_UNREGBI)
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#define FC_PATH BIT(4) /* do path search */
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#define FC_DEFPATH BIT(5) /* use default path in path search */
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#define AF_ARGV_ALLOC 0x1 /* argv[] array allocated */
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#define AF_ARGS_ALLOCED 0x2 /* argument strings allocated */
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#define AI_ARGV(a, i) ((i) == 0 ? (a).argv[0] : (a).argv[(i) - (a).skip])
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#define AI_ARGC(a) ((a).argc_ - (a).skip)
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/* Argument info. Used for $#, $* for shell, functions, includes, etc. */
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struct arg_info {
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int flags; /* AF_* */
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char **argv;
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int argc_;
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int skip; /* first arg is argv[0], second is argv[1 + skip] */
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};
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/*
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* activation record for function blocks
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*/
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struct block {
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Area area; /* area to allocate things */
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/*struct arg_info argi;*/
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char **argv;
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int argc;
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int flags; /* see BF_* */
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struct table vars; /* local variables */
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struct table funs; /* local functions */
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Getopt getopts_state;
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#if 1
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char * error; /* error handler */
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char * exit; /* exit handler */
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#else
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Trap error, exit;
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#endif
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struct block *next; /* enclosing block */
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};
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/* Values for struct block.flags */
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#define BF_DOGETOPTS BIT(0) /* save/restore getopts state */
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/*
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* Used by twalk() and tnext() routines.
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*/
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struct tstate {
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int left;
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struct tbl **next;
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};
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EXTERN struct table taliases; /* tracked aliases */
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EXTERN struct table builtins; /* built-in commands */
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EXTERN struct table aliases; /* aliases */
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EXTERN struct table keywords; /* keywords */
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EXTERN struct table homedirs; /* homedir() cache */
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struct builtin {
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const char *name;
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int (*func) ARGS((char **));
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};
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/* these really are externs! Look in table.c for them */
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extern const struct builtin shbuiltins [], kshbuiltins [];
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/* var spec values */
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#define V_NONE 0
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#define V_PATH 1
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#define V_IFS 2
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#define V_SECONDS 3
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#define V_OPTIND 4
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#define V_MAIL 5
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#define V_MAILPATH 6
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#define V_MAILCHECK 7
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#define V_RANDOM 8
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#define V_HISTSIZE 9
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#define V_HISTFILE 10
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#define V_VISUAL 11
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#define V_EDITOR 12
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#define V_COLUMNS 13
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#define V_POSIXLY_CORRECT 14
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#define V_TMOUT 15
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#define V_TMPDIR 16
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#define V_LINENO 17
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/* values for set_prompt() */
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#define PS1 0 /* command */
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#define PS2 1 /* command continuation */
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EXTERN char *path; /* copy of either PATH or def_path */
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EXTERN const char *def_path; /* path to use if PATH not set */
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EXTERN char *tmpdir; /* TMPDIR value */
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EXTERN const char *prompt;
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EXTERN int cur_prompt; /* PS1 or PS2 */
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EXTERN int current_lineno; /* LINENO value */
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