200 lines
5.1 KiB
C
200 lines
5.1 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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/* Portions of this file are Copyright (C) 9front's team.
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* See /doc/license/9front-mit for details about the licensing.
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* See http://code.9front.org/hg/plan9front/ for a list of authors.
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*/
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/*
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Copyright (c) Lucent Technologies 1997
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All Rights Reserved
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*/
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typedef double Awkfloat;
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#define xfree(a) { if ((a) != nil) { free((a)); (a) = nil; } }
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#define DEBUG
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#ifdef DEBUG
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/* uses have to be doubly parenthesized */
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# define dprint(x) if (dbg) jehanne_print x
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#else
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# define dprint(x)
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#endif
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#define FOPEN_MAX 40 /* max number of open files */
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extern char errbuf[];
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extern int compile_time; /* 1 if compiling, 0 if running */
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extern int safe; /* 0 => unsafe, 1 => safe */
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#define RECSIZE (8 * 1024) /* sets limit on records, fields, etc., etc. */
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extern int recsize; /* size of current record, orig RECSIZE */
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extern Biobuf stdin;
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extern Biobuf stdout;
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extern Biobuf stderr;
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extern char **FS;
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extern char **RS;
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extern char **ORS;
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extern char **OFS;
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extern char **OFMT;
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extern Awkfloat *NR;
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extern Awkfloat *FNR;
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extern Awkfloat *NF;
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extern char **FILENAME;
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extern char **SUBSEP;
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extern Awkfloat *RSTART;
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extern Awkfloat *RLENGTH;
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extern char *record; /* points to $0 */
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extern int lineno; /* line number in awk program */
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extern int errorflag; /* 1 if error has occurred */
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extern int donefld; /* 1 if record broken into fields */
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extern int donerec; /* 1 if record is valid (no fld has changed */
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extern char inputFS[]; /* FS at time of input, for field splitting */
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extern int dbg;
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extern char *patbeg; /* beginning of pattern matched */
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extern int patlen; /* length of pattern matched. set in b.c */
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/* Cell: all information about a variable or constant */
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typedef struct Cell {
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uint8_t ctype; /* OCELL, OBOOL, OJUMP, etc. */
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uint8_t csub; /* CCON, CTEMP, CFLD, etc. */
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char *nval; /* name, for variables only */
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char *sval; /* string value */
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Awkfloat fval; /* value as number */
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int tval; /* type info: STR|NUM|ARR|FCN|FLD|CON|DONTFREE */
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struct Cell *cnext; /* ptr to next if chained */
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} Cell;
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typedef struct Array { /* symbol table array */
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int nelemt; /* elements in table right now */
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int size; /* size of tab */
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Cell **tab; /* hash table pointers */
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} Array;
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#define NSYMTAB 50 /* initial size of a symbol table */
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extern Array *symtab;
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extern Cell *nrloc; /* NR */
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extern Cell *fnrloc; /* FNR */
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extern Cell *nfloc; /* NF */
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extern Cell *rstartloc; /* RSTART */
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extern Cell *rlengthloc; /* RLENGTH */
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/* Cell.tval values: */
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#define NUM 01 /* number value is valid */
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#define STR 02 /* string value is valid */
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#define DONTFREE 04 /* string space is not freeable */
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#define CON 010 /* this is a constant */
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#define ARR 020 /* this is an array */
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#define FCN 040 /* this is a function name */
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#define FLD 0100 /* this is a field $1, $2, ... */
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#define REC 0200 /* this is $0 */
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/* function types */
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#define FLENGTH 1
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#define FSQRT 2
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#define FEXP 3
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#define FLOG 4
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#define FINT 5
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#define FSYSTEM 6
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#define FRAND 7
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#define FSRAND 8
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#define FSIN 9
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#define FCOS 10
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#define FATAN 11
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#define FTOUPPER 12
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#define FTOLOWER 13
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#define FFLUSH 14
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#define FUTF 15
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/* Node: parse tree is made of nodes, with Cell's at bottom */
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typedef struct Node {
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int ntype;
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struct Node *nnext;
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int lineno;
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int nobj;
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struct Node *narg[1]; /* variable: actual size set by calling malloc */
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} Node;
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#define NIL ((Node *) 0)
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extern Node *winner;
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extern Node *nullstat;
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extern Node *nullnode;
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/* ctypes */
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#define OCELL 1
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#define OBOOL 2
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#define OJUMP 3
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/* Cell subtypes: csub */
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#define CFREE 7
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#define CCOPY 6
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#define CCON 5
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#define CTEMP 4
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#define CNAME 3
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#define CVAR 2
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#define CFLD 1
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#define CUNK 0
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/* bool subtypes */
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#define BTRUE 11
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#define BFALSE 12
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/* jump subtypes */
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#define JEXIT 21
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#define JNEXT 22
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#define JBREAK 23
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#define JCONT 24
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#define JRET 25
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#define JNEXTFILE 26
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/* node types */
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#define NVALUE 1
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#define NSTAT 2
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#define NEXPR 3
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extern int pairstack[], paircnt;
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#define notlegal(n) (n <= FIRSTTOKEN || n >= LASTTOKEN || proctab[n-FIRSTTOKEN] == nullproc)
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#define isvalue(n) ((n)->ntype == NVALUE)
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#define isexpr(n) ((n)->ntype == NEXPR)
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#define isjump(n) ((n)->ctype == OJUMP)
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#define isexit(n) ((n)->csub == JEXIT)
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#define isbreak(n) ((n)->csub == JBREAK)
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#define iscont(n) ((n)->csub == JCONT)
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#define isnext(n) ((n)->csub == JNEXT)
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#define isnextfile(n) ((n)->csub == JNEXTFILE)
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#define isret(n) ((n)->csub == JRET)
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#define isrec(n) ((n)->tval & REC)
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#define isfld(n) ((n)->tval & FLD)
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#define isstr(n) ((n)->tval & STR)
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#define isnum(n) ((n)->tval & NUM)
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#define isarr(n) ((n)->tval & ARR)
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#define isfcn(n) ((n)->tval & FCN)
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#define istrue(n) ((n)->csub == BTRUE)
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#define istemp(n) ((n)->csub == CTEMP)
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#define isargument(n) ((n)->nobj == ARG)
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/* #define freeable(p) (!((p)->tval & DONTFREE)) */
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#define freeable(p) ( ((p)->tval & (STR|DONTFREE)) == STR )
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#include "proto.h"
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