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- /* davcor.c - utility functions for programs inspired by Cortesi */
- /* Version 1.1 1982/12/18 19:19 */
- /*
- Inspired by the assembly language routine ACTDIR in
- David E. Cortesi's INSIDE CP/M: A Guide for Users and Programmers,
- Holt, Rinehart and Winston, New York 1982, p. 226-228.
-
- C version:
-
- Copyright 1982 William G. Hutchison, Jr.
- P.O. Box 278
- Exton, PA 19341-0278
- U.S.A.
-
- CompuServe 70665,1307
-
-
-
-
- This program may be used freely for any non-commercial
- purpose, provided that the user does not remove or alter
- this notice or the copyright statement.
- Those who wish to sell or lease this program, or to
- incorporate it into a product for sale or lease, should
- apply to the author (above) for licensing information.
- This program is not covered by a warranty, either
- express or implied. The author shall not be responsible for
- any damages (including consequential) caused by reliance on
- the materials presented, including but not limited to
- typographical errors or arithmetic errors.
-
- This version is for C/80 Version 2 from Software Toolworks.
-
-
- */
-
- /* over-ride bytes-per-line for Osborne: */
- #undef BPL
- #define BPL 8
-
- hex_dump(base, len)
- char *base;
- int len;
- {
- char *p;
- int i;
-
- for (; len > 0; len-= BPL, base+= BPL) {
- /*
- printf("%4x:", (unsigned)base);
- */
- for (p= base, i= (len > BPL)? BPL : len; i > 0; i--)
- printf(" %2x", peek(p++));
- for (i= BPL-len; i > 0; i--)
- printf(" ");
- printf(" ");
- for (p= base, i= (len > BPL)? BPL : len; i > 0; i--)
- printf("%c", printable(*p++));
- printf("\n");
- }
- } /* end of hex_dump */
-
- init_fcb(f, d, fn, ft, x) /* initialize an FCB */
- struct fcb *f;
- char d, *fn, *ft, x;
- {
- int i;
-
- f->drv= d;
- strmove(fn, f->filename);
- strmove(ft, f->type);
- f->extent= x;
- f->s1= f->s2= f->rec_count= 0;
- for (i= 16-1; i >= 0; i--)
- f->map[i]= 0;
- } /* end of init_fcb */
-
- peek(p)
- char *p;
- {return (0xFF & *p);}
-
- #ifdef ASCII
- printable(c)
- char c;
- {
- return (32 <= c && c <= 127? c : '.');
- }
- #endif
-
- strmove(from, to) /* move string but not '\0' */
- char *from,*to;
- {
- while (*from)
- *to++= *from++;
- } /* end of strmove */