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Disc to the Future 2
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Disc to the Future Part II Programmer's Reference (Wayzata Technology)(6013)(1992).bin
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ARCDIR.MAC
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1986-02-04
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/* ARC - Archive utility - ARCDIR
$define(tag,$$segment(@1,$$index(@1,=)+1))#
$define(version,Version $tag(
TED_VERSION DB =1.02), created on $tag(
TED_DATE DB =02/04/86) at $tag(
TED_TIME DB =01:36:09))#
$undefine(tag)#
$version
(C) COPYRIGHT 1985 by System Enhancement Associates; ALL RIGHTS RESERVED
By: Thom Henderson
Description:
This file contains the dir() routine used when adding files to an
archive. It is an adaptation of the CI-C86 library function
filedir(). It differes in that it returns the file names one by
one, instead of all at once.
Language:
Computer Innovations Optimizing C86
*/
#include <stdio.h>
static struct
{ char dummy[21]; /* reserved for dos */
unsigned char attribute; /* returned attribute */
unsigned time;
unsigned date;
long size; /* size of file */
unsigned char fn[13]; /* string containing the filename */
} ff_area;
char *dir(filename,mode) /* get files, one by one */
char *filename; /* template, or NULL */
int mode; /* search mode bits */
{
struct { int ax,bx,cx,dx,si,di,ds,es; } reg;
char *result, *alloc();
static int first = 1; /* true only on first call */
#ifdef _C86_BIG
reg.ds = ((unsigned long)filename) >> 16;
#else
segread(®.si); /* get ds value */
#endif
if(filename) /* if filename is given */
{ reg.dx = filename; /* then use it */
reg.ax = 0x4e00; /* and search for first */
}
else if(first) /* if no name and first call */
return NULL; /* then not much we can do */
else reg.ax = 0x4f00; /* else search for next */
first = 0; /* no longer first time */
reg.cx = mode; /* set search modes */
bdos(0x1a,&ff_area); /* set the transfer address */
if(sysint21(®,®)&1)
return NULL; /* no more files */
result = alloc(strlen(ff_area.fn)+1);
strcpy(result,ff_area.fn); /* save name of file */
return result;
}