Annotation of src/usr.bin/m4/mdef.h, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: mdef.h,v 1.6 1995/09/28 05:37:39 tls Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1989, 1993
! 5: * The Regents of the University of California. All rights reserved.
! 6: *
! 7: * This code is derived from software contributed to Berkeley by
! 8: * Ozan Yigit at York University.
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: * 3. All advertising materials mentioning features or use of this software
! 19: * must display the following acknowledgement:
! 20: * This product includes software developed by the University of
! 21: * California, Berkeley and its contributors.
! 22: * 4. Neither the name of the University nor the names of its contributors
! 23: * may be used to endorse or promote products derived from this software
! 24: * without specific prior written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 36: * SUCH DAMAGE.
! 37: *
! 38: * @(#)mdef.h 8.1 (Berkeley) 6/6/93
! 39: */
! 40:
! 41: #define MACRTYPE 1
! 42: #define DEFITYPE 2
! 43: #define EXPRTYPE 3
! 44: #define SUBSTYPE 4
! 45: #define IFELTYPE 5
! 46: #define LENGTYPE 6
! 47: #define CHNQTYPE 7
! 48: #define SYSCTYPE 8
! 49: #define UNDFTYPE 9
! 50: #define INCLTYPE 10
! 51: #define SINCTYPE 11
! 52: #define PASTTYPE 12
! 53: #define SPASTYPE 13
! 54: #define INCRTYPE 14
! 55: #define IFDFTYPE 15
! 56: #define PUSDTYPE 16
! 57: #define POPDTYPE 17
! 58: #define SHIFTYPE 18
! 59: #define DECRTYPE 19
! 60: #define DIVRTYPE 20
! 61: #define UNDVTYPE 21
! 62: #define DIVNTYPE 22
! 63: #define MKTMTYPE 23
! 64: #define ERRPTYPE 24
! 65: #define M4WRTYPE 25
! 66: #define TRNLTYPE 26
! 67: #define DNLNTYPE 27
! 68: #define DUMPTYPE 28
! 69: #define CHNCTYPE 29
! 70: #define INDXTYPE 30
! 71: #define SYSVTYPE 31
! 72: #define EXITTYPE 32
! 73: #define DEFNTYPE 33
! 74:
! 75: #define STATIC 128
! 76:
! 77: /*
! 78: * m4 special characters
! 79: */
! 80:
! 81: #define ARGFLAG '$'
! 82: #define LPAREN '('
! 83: #define RPAREN ')'
! 84: #define LQUOTE '`'
! 85: #define RQUOTE '\''
! 86: #define COMMA ','
! 87: #define SCOMMT '#'
! 88: #define ECOMMT '\n'
! 89:
! 90: #ifdef msdos
! 91: #define system(str) (-1)
! 92: #endif
! 93:
! 94: /*
! 95: * other important constants
! 96: */
! 97:
! 98: #define EOS (char) 0
! 99: #define MAXINP 10 /* maximum include files */
! 100: #define MAXOUT 10 /* maximum # of diversions */
! 101: #define MAXSTR 512 /* maximum size of string */
! 102: #define BUFSIZE 4096 /* size of pushback buffer */
! 103: #define STACKMAX 1024 /* size of call stack */
! 104: #define STRSPMAX 4096 /* size of string space */
! 105: #define MAXTOK MAXSTR /* maximum chars in a tokn */
! 106: #define HASHSIZE 199 /* maximum size of hashtab */
! 107:
! 108: #define ALL 1
! 109: #define TOP 0
! 110:
! 111: #define TRUE 1
! 112: #define FALSE 0
! 113: #define cycle for(;;)
! 114:
! 115: /*
! 116: * m4 data structures
! 117: */
! 118:
! 119: typedef struct ndblock *ndptr;
! 120:
! 121: struct ndblock { /* hastable structure */
! 122: char *name; /* entry name.. */
! 123: char *defn; /* definition.. */
! 124: int type; /* type of the entry.. */
! 125: ndptr nxtptr; /* link to next entry.. */
! 126: };
! 127:
! 128: #define nil ((ndptr) 0)
! 129:
! 130: struct keyblk {
! 131: char *knam; /* keyword name */
! 132: int ktyp; /* keyword type */
! 133: };
! 134:
! 135: typedef union { /* stack structure */
! 136: int sfra; /* frame entry */
! 137: char *sstr; /* string entry */
! 138: } stae;
! 139:
! 140: /*
! 141: * macros for readibility and/or speed
! 142: *
! 143: * gpbc() - get a possibly pushed-back character
! 144: * pushf() - push a call frame entry onto stack
! 145: * pushs() - push a string pointer onto stack
! 146: */
! 147: #define gpbc() (bp > bufbase) ? *--bp : getc(infile[ilevel])
! 148: #define pushf(x) if (sp < STACKMAX) mstack[++sp].sfra = (x)
! 149: #define pushs(x) if (sp < STACKMAX) mstack[++sp].sstr = (x)
! 150:
! 151: /*
! 152: * . .
! 153: * | . | <-- sp | . |
! 154: * +-------+ +-----+
! 155: * | arg 3 ----------------------->| str |
! 156: * +-------+ | . |
! 157: * | arg 2 ---PREVEP-----+ .
! 158: * +-------+ |
! 159: * . | | |
! 160: * +-------+ | +-----+
! 161: * | plev | PARLEV +-------->| str |
! 162: * +-------+ | . |
! 163: * | type | CALTYP .
! 164: * +-------+
! 165: * | prcf ---PREVFP--+
! 166: * +-------+ |
! 167: * | . | PREVSP |
! 168: * . |
! 169: * +-------+ |
! 170: * | <----------+
! 171: * +-------+
! 172: *
! 173: */
! 174: #define PARLEV (mstack[fp].sfra)
! 175: #define CALTYP (mstack[fp-1].sfra)
! 176: #define PREVEP (mstack[fp+3].sstr)
! 177: #define PREVSP (fp-3)
! 178: #define PREVFP (mstack[fp-2].sfra)
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