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Annotation of 43BSDReno/usr.bin/roff/nroff_term/mktab.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1989 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #ifndef lint
        !            19: char copyright[] =
        !            20: "@(#) Copyright (c) 1989 Regents of the University of California.\n\
        !            21:  All rights reserved.\n";
        !            22: #endif /* not lint */
        !            23: 
        !            24: #ifndef lint
        !            25: static char sccsid[] = "@(#)mktab.c    5.1 (Berkeley) 2/28/89";
        !            26: #endif /* not lint */
        !            27: 
        !            28: /*
        !            29:  * mktab.c
        !            30:  *
        !            31:  * Function:   Build nroff terminal tables in a compiler-independent way.
        !            32:  * Usage:      cc -Itroff mktab.c tabnnn.c -o mktab; mktab > tabnnn
        !            33:  * Date:       Sat Feb 25 00:10:06 MST 1989
        !            34:  * Author:     Donn Seeley
        !            35:  * Remarks:
        !            36:  *     Traditional nroff terminal table construction works by compiling
        !            37:  *     a C file into a binary that is read directly into nroff as it runs.
        !            38:  *     If your C compiler or your relocation format differ from what nroff
        !            39:  *     expects, you lose.  This program, when linked with a terminal table
        !            40:  *     object file, fakes up an 'object' file that looks enough like the
        !            41:  *     traditional one to fool nroff.
        !            42:  */
        !            43: 
        !            44: #include <stdio.h>
        !            45: #include "tw.h"
        !            46: 
        !            47: main()
        !            48: {
        !            49:        static struct fake_exec {
        !            50:                int bogus[8];   /* bogus[2] == a_data */
        !            51:        } fe;
        !            52:        register int *bip;
        !            53:        register char **tip;
        !            54:        register int offset = sizeof t;
        !            55:        int buf[sizeof t / sizeof (int)];
        !            56:        char *malloc();
        !            57:        int twbase = (int *) &t.twinit - &t.bset;
        !            58: 
        !            59:        /*
        !            60:         * Copy the integers at the start of the table.
        !            61:         */
        !            62:        bcopy((char *) &t, (char *) buf, twbase * sizeof (int));
        !            63: 
        !            64:        /*
        !            65:         * Replace the character pointers in the copy with integer offsets.
        !            66:         * This duplicates the effect of relocation offsets.
        !            67:         * Take care to count the possibly null control bytes in the codetab
        !            68:         *      section.
        !            69:         */
        !            70:        for (bip = &buf[twbase], tip = &t.twinit;
        !            71:             tip < &t.codetab[0];
        !            72:             ++bip, ++tip)
        !            73:                if (*tip) {
        !            74:                        *bip = offset;
        !            75:                        offset += strlen(*tip) + 1;
        !            76:                } else
        !            77:                        *bip = 0;
        !            78:        for (; tip < &t.zzz; ++bip, ++tip)
        !            79:                if (*tip) {
        !            80:                        *bip = offset;
        !            81:                        offset += strlen(*tip + 1) + 2;
        !            82:                } else
        !            83:                        *bip = 0;
        !            84: 
        !            85:        /*
        !            86:         * Patch in a fake data segment size field.
        !            87:         */
        !            88:        fe.bogus[2] = offset;
        !            89: 
        !            90:        /*
        !            91:         * Dump the header and the table.
        !            92:         */
        !            93:        (void) fwrite((char *) &fe, sizeof fe, 1, stdout);
        !            94:        (void) fwrite((char *) buf, sizeof t, 1, stdout);
        !            95: 
        !            96:        /*
        !            97:         * Dump the strings.
        !            98:         */
        !            99:        for (tip = &t.twinit; tip < &t.codetab[0]; ++tip)
        !           100:                if (*tip) {
        !           101:                        fputs(*tip, stdout);
        !           102:                        putchar('\0');
        !           103:                }
        !           104:        for (tip = &t.codetab[0]; tip < &t.zzz; ++tip)
        !           105:                if (*tip) {
        !           106:                        putchar(**tip);
        !           107:                        fputs(*tip + 1, stdout);
        !           108:                        putchar('\0');
        !           109:                }
        !           110: 
        !           111:        return 0;
        !           112: }

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