1/* $NetBSD: table.h,v 1.3 1999/10/20 15:10:00 hubertf Exp $ */ 2 3/* 4 * generic hashed associative table for commands and variables. 5 */ 6 7struct table { 8 Area *areap; /* area to allocate entries */ 9 short size, nfree; /* hash size (always 2^^n), free entries */ 10 struct tbl **tbls; /* hashed table items */ 11}; 12 13struct tbl { /* table item */ 14 Tflag flag; /* flags */ 15 int type; /* command type (see below), base (if INTEGER), 16 * or offset from val.s of value (if EXPORT) */ 17 Area *areap; /* area to allocate from */ 18 union { 19 char *s; /* string */ 20 long i; /* integer */ 21 int (*f) ARGS((char **)); /* int function */ 22 struct op *t; /* "function" tree */ 23 } val; /* value */ 24 int index; /* index for an array */ 25 union { 26 int field; /* field with for -L/-R/-Z */ 27 int errno_; /* CEXEC/CTALIAS */ 28 } u2; 29 union { 30 struct tbl *array; /* array values */ 31 char *fpath; /* temporary path to undef function */ 32 } u; 33 char name[4]; /* name -- variable length */ 34}; 35 36/* common flag bits */ 37#define ALLOC BIT(0) /* val.s has been allocated */ 38#define DEFINED BIT(1) /* is defined in block */ 39#define ISSET BIT(2) /* has value, vp->val.[si] */ 40#define EXPORT BIT(3) /* exported variable/function */ 41#define TRACE BIT(4) /* var: user flagged, func: execution tracing */ 42/* (start non-common flags at 8) */ 43/* flag bits used for variables */ 44#define SPECIAL BIT(8) /* PATH, IFS, SECONDS, etc */ 45#define INTEGER BIT(9) /* val.i contains integer value */ 46#define RDONLY BIT(10) /* read-only variable */ 47#define LOCAL BIT(11) /* for local typeset() */ 48#define ARRAY BIT(13) /* array */ 49#define LJUST BIT(14) /* left justify */ 50#define RJUST BIT(15) /* right justify */ 51#define ZEROFIL BIT(16) /* 0 filled if RJUSTIFY, strip 0s if LJUSTIFY */ 52#define LCASEV BIT(17) /* convert to lower case */ 53#define UCASEV_AL BIT(18)/* convert to upper case / autoload function */ 54#define INT_U BIT(19) /* unsigned integer */ 55#define INT_L BIT(20) /* long integer (no-op) */ 56#define IMPORT BIT(21) /* flag to typeset(): no arrays, must have = */ 57#define LOCAL_COPY BIT(22) /* with LOCAL - copy attrs from existing var */ 58#define EXPRINEVAL BIT(23) /* contents currently being evaluated */ 59#define EXPRLVALUE BIT(24) /* useable as lvalue (temp flag) */ 60/* flag bits used for taliases/builtins/aliases/keywords/functions */ 61#define KEEPASN BIT(8) /* keep command assignments (eg, var=x cmd) */ 62#define FINUSE BIT(9) /* function being executed */ 63#define FDELETE BIT(10) /* function deleted while it was executing */ 64#define FKSH BIT(11) /* function defined with function x (vs x()) */ 65#define SPEC_BI BIT(12) /* a POSIX special builtin */ 66#define REG_BI BIT(13) /* a POSIX regular builtin */ 67/* Attributes that can be set by the user (used to decide if an unset param 68 * should be repoted by set/typeset). Does not include ARRAY or LOCAL. 69 */ 70#define USERATTRIB (EXPORT|INTEGER|RDONLY|LJUST|RJUST|ZEROFIL\ 71 |LCASEV|UCASEV_AL|INT_U|INT_L) 72 73/* command types */ 74#define CNONE 0 /* undefined */ 75#define CSHELL 1 /* built-in */ 76#define CFUNC 2 /* function */ 77#define CEXEC 4 /* executable command */ 78#define CALIAS 5 /* alias */ 79#define CKEYWD 6 /* keyword */ 80#define CTALIAS 7 /* tracked alias */ 81 82/* Flags for findcom()/comexec() */ 83#define FC_SPECBI BIT(0) /* special builtin */ 84#define FC_FUNC BIT(1) /* function builtin */ 85#define FC_REGBI BIT(2) /* regular builtin */ 86#define FC_UNREGBI BIT(3) /* un-regular builtin (!special,!regular) */ 87#define FC_BI (FC_SPECBI|FC_REGBI|FC_UNREGBI) 88#define FC_PATH BIT(4) /* do path search */ 89#define FC_DEFPATH BIT(5) /* use default path in path search */ 90 91 92#define AF_ARGV_ALLOC 0x1 /* argv[] array allocated */ 93#define AF_ARGS_ALLOCED 0x2 /* argument strings allocated */ 94#define AI_ARGV(a, i) ((i) == 0 ? (a).argv[0] : (a).argv[(i) - (a).skip]) 95#define AI_ARGC(a) ((a).argc_ - (a).skip) 96 97/* Argument info. Used for $#, $* for shell, functions, includes, etc. */ 98struct arg_info { 99 int flags; /* AF_* */ 100 char **argv; 101 int argc_; 102 int skip; /* first arg is argv[0], second is argv[1 + skip] */ 103}; 104 105/* 106 * activation record for function blocks 107 */ 108struct block { 109 Area area; /* area to allocate things */ 110 /*struct arg_info argi;*/ 111 char **argv; 112 int argc; 113 int flags; /* see BF_* */ 114 struct table vars; /* local variables */ 115 struct table funs; /* local functions */ 116 Getopt getopts_state; 117#if 1 118 char * error; /* error handler */ 119 char * exit; /* exit handler */ 120#else 121 Trap error, exit; 122#endif 123 struct block *next; /* enclosing block */ 124}; 125 126/* Values for struct block.flags */ 127#define BF_DOGETOPTS BIT(0) /* save/restore getopts state */ 128 129/* 130 * Used by twalk() and tnext() routines. 131 */ 132struct tstate { 133 int left; 134 struct tbl **next; 135}; 136 137 138EXTERN struct table taliases; /* tracked aliases */ 139EXTERN struct table builtins; /* built-in commands */ 140EXTERN struct table aliases; /* aliases */ 141EXTERN struct table keywords; /* keywords */ 142EXTERN struct table homedirs; /* homedir() cache */ 143 144struct builtin { 145 const char *name; 146 int (*func) ARGS((char **)); 147}; 148 149/* these really are externs! Look in table.c for them */ 150extern const struct builtin shbuiltins [], kshbuiltins []; 151 152/* var spec values */ 153#define V_NONE 0 154#define V_PATH 1 155#define V_IFS 2 156#define V_SECONDS 3 157#define V_OPTIND 4 158#define V_MAIL 5 159#define V_MAILPATH 6 160#define V_MAILCHECK 7 161#define V_RANDOM 8 162#define V_HISTSIZE 9 163#define V_HISTFILE 10 164#define V_VISUAL 11 165#define V_EDITOR 12 166#define V_COLUMNS 13 167#define V_POSIXLY_CORRECT 14 168#define V_TMOUT 15 169#define V_TMPDIR 16 170#define V_LINENO 17 171 172/* values for set_prompt() */ 173#define PS1 0 /* command */ 174#define PS2 1 /* command continuation */ 175 176EXTERN char *path; /* copy of either PATH or def_path */ 177EXTERN const char *def_path; /* path to use if PATH not set */ 178EXTERN char *tmpdir; /* TMPDIR value */ 179EXTERN const char *prompt; 180EXTERN int cur_prompt; /* PS1 or PS2 */ 181EXTERN int current_lineno; /* LINENO value */ 182