Annotation of src/usr.bin/awk/awk.h, Revision 1.13
1.13 ! millert 1: /* $OpenBSD: awk.h,v 1.12 2008/06/04 14:04:42 pyr Exp $ */
1.1 tholo 2: /****************************************************************
1.5 kstailey 3: Copyright (C) Lucent Technologies 1997
1.1 tholo 4: All Rights Reserved
5:
6: Permission to use, copy, modify, and distribute this software and
7: its documentation for any purpose and without fee is hereby
8: granted, provided that the above copyright notice appear in all
9: copies and that both that the copyright notice and this
10: permission notice and warranty disclaimer appear in supporting
1.5 kstailey 11: documentation, and that the name Lucent Technologies or any of
12: its entities not be used in advertising or publicity pertaining
13: to distribution of the software without specific, written prior
14: permission.
15:
16: LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
17: INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
18: IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
19: SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
20: WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
21: IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
22: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
23: THIS SOFTWARE.
1.1 tholo 24: ****************************************************************/
25:
1.11 millert 26: #include <assert.h>
27:
1.1 tholo 28: typedef double Awkfloat;
29:
30: /* unsigned char is more trouble than it's worth */
31:
32: typedef unsigned char uschar;
33:
1.13 ! millert 34: #define xfree(a) { if ((a) != NULL) { free((void *) (a)); (a) = NULL; } }
1.1 tholo 35:
1.10 millert 36: #define NN(p) ((p) ? (p) : "(null)") /* guaranteed non-null for dprintf
37: */
1.1 tholo 38: #define DEBUG
39: #ifdef DEBUG
40: /* uses have to be doubly parenthesized */
41: # define dprintf(x) if (dbg) printf x
42: #else
43: # define dprintf(x)
44: #endif
45:
46: extern int compile_time; /* 1 if compiling, 0 if running */
1.5 kstailey 47: extern int safe; /* 0 => unsafe, 1 => safe */
1.1 tholo 48:
1.5 kstailey 49: #define RECSIZE (8 * 1024) /* sets limit on records, fields, etc., etc. */
50: extern int recsize; /* size of current record, orig RECSIZE */
1.1 tholo 51:
52: extern char **FS;
53: extern char **RS;
54: extern char **ORS;
55: extern char **OFS;
56: extern char **OFMT;
57: extern Awkfloat *NR;
58: extern Awkfloat *FNR;
59: extern Awkfloat *NF;
60: extern char **FILENAME;
61: extern char **SUBSEP;
62: extern Awkfloat *RSTART;
63: extern Awkfloat *RLENGTH;
64:
65: extern char *record; /* points to $0 */
66: extern int lineno; /* line number in awk program */
67: extern int errorflag; /* 1 if error has occurred */
68: extern int donefld; /* 1 if record broken into fields */
69: extern int donerec; /* 1 if record is valid (no fld has changed */
1.2 millert 70: extern char inputFS[]; /* FS at time of input, for field splitting */
1.1 tholo 71:
72: extern int dbg;
73:
74: extern char *patbeg; /* beginning of pattern matched */
75: extern int patlen; /* length of pattern matched. set in b.c */
76:
77: /* Cell: all information about a variable or constant */
78:
79: typedef struct Cell {
80: uschar ctype; /* OCELL, OBOOL, OJUMP, etc. */
81: uschar csub; /* CCON, CTEMP, CFLD, etc. */
82: char *nval; /* name, for variables only */
83: char *sval; /* string value */
84: Awkfloat fval; /* value as number */
1.6 millert 85: int tval; /* type info: STR|NUM|ARR|FCN|FLD|CON|DONTFREE */
1.1 tholo 86: struct Cell *cnext; /* ptr to next if chained */
87: } Cell;
88:
1.5 kstailey 89: typedef struct Array { /* symbol table array */
1.1 tholo 90: int nelem; /* elements in table right now */
91: int size; /* size of tab */
92: Cell **tab; /* hash table pointers */
93: } Array;
94:
95: #define NSYMTAB 50 /* initial size of a symbol table */
96: extern Array *symtab;
97:
98: extern Cell *nrloc; /* NR */
99: extern Cell *fnrloc; /* FNR */
100: extern Cell *nfloc; /* NF */
101: extern Cell *rstartloc; /* RSTART */
102: extern Cell *rlengthloc; /* RLENGTH */
103:
104: /* Cell.tval values: */
105: #define NUM 01 /* number value is valid */
106: #define STR 02 /* string value is valid */
107: #define DONTFREE 04 /* string space is not freeable */
108: #define CON 010 /* this is a constant */
109: #define ARR 020 /* this is an array */
110: #define FCN 040 /* this is a function name */
111: #define FLD 0100 /* this is a field $1, $2, ... */
112: #define REC 0200 /* this is $0 */
113:
114:
115: /* function types */
116: #define FLENGTH 1
117: #define FSQRT 2
118: #define FEXP 3
119: #define FLOG 4
120: #define FINT 5
121: #define FSYSTEM 6
122: #define FRAND 7
123: #define FSRAND 8
124: #define FSIN 9
125: #define FCOS 10
126: #define FATAN 11
127: #define FTOUPPER 12
128: #define FTOLOWER 13
129: #define FFLUSH 14
1.12 pyr 130: #define FAND 15
131: #define FFOR 16
132: #define FXOR 17
133: #define FCOMPL 18
134: #define FLSHIFT 19
135: #define FRSHIFT 20
1.1 tholo 136:
137: /* Node: parse tree is made of nodes, with Cell's at bottom */
138:
139: typedef struct Node {
140: int ntype;
141: struct Node *nnext;
142: int lineno;
143: int nobj;
1.6 millert 144: struct Node *narg[1]; /* variable: actual size set by calling malloc */
1.1 tholo 145: } Node;
146:
147: #define NIL ((Node *) 0)
148:
149: extern Node *winner;
150: extern Node *nullstat;
151: extern Node *nullnode;
152:
153: /* ctypes */
154: #define OCELL 1
155: #define OBOOL 2
156: #define OJUMP 3
157:
158: /* Cell subtypes: csub */
159: #define CFREE 7
160: #define CCOPY 6
161: #define CCON 5
162: #define CTEMP 4
163: #define CNAME 3
164: #define CVAR 2
165: #define CFLD 1
166: #define CUNK 0
167:
168: /* bool subtypes */
169: #define BTRUE 11
170: #define BFALSE 12
171:
172: /* jump subtypes */
173: #define JEXIT 21
174: #define JNEXT 22
175: #define JBREAK 23
176: #define JCONT 24
177: #define JRET 25
178: #define JNEXTFILE 26
179:
180: /* node types */
181: #define NVALUE 1
182: #define NSTAT 2
183: #define NEXPR 3
184:
185:
1.4 millert 186: extern int pairstack[], paircnt;
1.1 tholo 187:
188: #define notlegal(n) (n <= FIRSTTOKEN || n >= LASTTOKEN || proctab[n-FIRSTTOKEN] == nullproc)
189: #define isvalue(n) ((n)->ntype == NVALUE)
190: #define isexpr(n) ((n)->ntype == NEXPR)
191: #define isjump(n) ((n)->ctype == OJUMP)
192: #define isexit(n) ((n)->csub == JEXIT)
193: #define isbreak(n) ((n)->csub == JBREAK)
194: #define iscont(n) ((n)->csub == JCONT)
1.9 millert 195: #define isnext(n) ((n)->csub == JNEXT || (n)->csub == JNEXTFILE)
1.1 tholo 196: #define isret(n) ((n)->csub == JRET)
1.5 kstailey 197: #define isrec(n) ((n)->tval & REC)
198: #define isfld(n) ((n)->tval & FLD)
1.1 tholo 199: #define isstr(n) ((n)->tval & STR)
200: #define isnum(n) ((n)->tval & NUM)
201: #define isarr(n) ((n)->tval & ARR)
1.5 kstailey 202: #define isfcn(n) ((n)->tval & FCN)
1.1 tholo 203: #define istrue(n) ((n)->csub == BTRUE)
204: #define istemp(n) ((n)->csub == CTEMP)
205: #define isargument(n) ((n)->nobj == ARG)
1.5 kstailey 206: /* #define freeable(p) (!((p)->tval & DONTFREE)) */
207: #define freeable(p) ( ((p)->tval & (STR|DONTFREE)) == STR )
1.1 tholo 208:
209: /* structures used by regular expression matching machinery, mostly b.c: */
210:
1.11 millert 211: #define NCHARS (256+3) /* 256 handles 8-bit chars; 128 does 7-bit */
1.1 tholo 212: /* watch out in match(), etc. */
213: #define NSTATES 32
214:
215: typedef struct rrow {
1.6 millert 216: long ltype; /* long avoids pointer warnings on 64-bit */
1.1 tholo 217: union {
218: int i;
219: Node *np;
1.9 millert 220: uschar *up;
1.1 tholo 221: } lval; /* because Al stores a pointer in it! */
1.4 millert 222: int *lfollow;
1.1 tholo 223: } rrow;
224:
225: typedef struct fa {
1.6 millert 226: uschar gototab[NSTATES][NCHARS];
227: uschar out[NSTATES];
1.9 millert 228: uschar *restr;
1.6 millert 229: int *posns[NSTATES];
1.1 tholo 230: int anchor;
231: int use;
232: int initstat;
233: int curstat;
234: int accept;
235: int reset;
1.6 millert 236: struct rrow re[1]; /* variable: actual size set by calling malloc */
1.1 tholo 237: } fa;
238:
239:
240: #include "proto.h"
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