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wildexp.c
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1994-07-13
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5KB
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211 lines
/*
WILDEXP.C v1.1 3/21/82
BDS C Command-line Wild-card expansion utility
Written by Leor Zolman
Lets ambiguous file names appear on the command line to C programs,
automatically expanding the parameter list to contain all files that
fit the afn's.
An afn preceded by a "!" causes all names matching the given afn to
be EXCLUDED from the resulting expansion list. Thus, to yield a
command line containing all files except "COM" files, you'd say:
A>progname !*.com <cr>
Another example: to get all files on B: except .C files, say:
A>prognam b:*.* !b:*.c <cr>
When giving a "!" afn, "*" chars in the string matches to the end of
either the filename or extension, just like CP/M, but "?" chars match
ONE and ONLY ONE character in either the filename or extension.
To use WILDEXP, begin your "main" function as follows:
---------------------------------------------
main(argc,argv)
char **argv;
{
... /* local declarations */
wildexp(&argc,&argv); /* first statement in program */
dioinit(&argc,argv); /* if using DIO, put this here */
.
.
.
---------------------------------------------
and link WILDEXP.CRL in with your program. That's all there is to
it; note that "wildexp" uses the "sbrk" function to obtain storage,
so don't go playing around with memory that is outside of the
external or stack areas unless you obtain the memory through "sbrk"
or "alloc" calls.
*/
#include "bdscio.h"
#define MAXITEMS 200 /* max no. of items after expansion */
#define SEARCH_FIRST 17 /* BDOS calls */
#define SEARCH_NEXT 18
wildexp(oargcp, oargvp)
int *oargcp; /* pointer to old argc */
char ***oargvp; /* pointer to old argv */
{
int nargc; /* new argc */
char **nargv; /* new argv */
char **oargv; /* old argv */
int oargc; /* old argc */
char fcb[36]; /* fcb used for search for first/next calls */
char dmapos; /* value returned by search calls */
char first_time; /* used in search routine */
char tmpfn[20], /* temp filename buffer */
*tmpfnp;
char *notfns[20]; /* list of !<afn> entries */
int notcount; /* count of entries in notfns */
char cur_drive; /* currently logged drive */
int i,j,k;
cur_drive = bdos(25);
oargv = *oargvp;
oargc = *oargcp;
nargc = 1;
notcount = 0;
if ((nargv = sbrk(MAXITEMS * 2 + 2)) == ERROR)
return ERROR;
for (i = 1; i < oargc; i++)
if (oargv[i][0] == '!') {
if (i == 1) {
oargv[oargc] = "*.*";
oargc++;
}
notfns[notcount++] = &oargv[i][1];
}
else if (!haswild(oargv[i]))
nargv[nargc++] = oargv[i];
else {
setfcb(fcb,oargv[i]);
tmpfnp = tmpfn;
if ((tmpfn[1] = oargv[i][1]) == ':') {
tmpfn[0] = oargv[i][0];
tmpfnp = tmpfn + 2;
bdos(14,tmpfn[0] - 'A');
}
first_time = TRUE;
while (1) { /* find all matching files */
dmapos = bdos(first_time ? SEARCH_FIRST : SEARCH_NEXT,
fcb);
if (dmapos == 255) break;
first_time = FALSE;
hackname(tmpfnp,(BASE + 0x80 + dmapos * 32));
if ((nargv[nargc] = sbrk(strlen(tmpfn) + 1)) == ERROR)
return ERROR;
strcpy(nargv[nargc++], tmpfn);
}
bdos(14,cur_drive); /* restore to current drive */
}
for (i = 0; i < notcount; i++)
for (j = 1; j < nargc; j++)
while (match(notfns[i],nargv[j],cur_drive))
{
if(j == --nargc)
break;
for (k = j; k < nargc; k++)
nargv[k] = nargv[k+1];
}
*oargcp = nargc;
*oargvp = nargv;
return 0;
}
hackname(dest,source)
char *dest, *source;
{
int i,j;
j = 0;
for (i = 1; i < 9; i++)
{
if (source[i] == ' ') break;
dest[j++] = source[i];
}
if (source[9] != ' ')
dest[j++] = '.';
for (i = 9; i < 12; i++)
{
if (source[i] == ' ') break;
dest[j++] = source[i];
}
dest[j] = '\0';
return dest;
}
int haswild(fname)
char *fname;
{
char c;
while (c = *fname++)
if (c == '*' || c == '?')
return TRUE;
return FALSE;
}
int match(wildnam, filnam, cur_drive)
char *wildnam, *filnam, cur_drive;
{
char c;
if (wildnam[1] != ':')
{
if (filnam[1] == ':')
if (filnam[0] - 'A' == cur_drive)
filnam += 2;
else
return FALSE;
}
else
{
if (filnam[1] != ':')
if (wildnam[0] - 'A' == cur_drive)
wildnam += 2;
else
return FALSE;
}
while (c = *wildnam++)
if (c == '?')
if ((c = *filnam++) && c != '.')
continue;
else
return FALSE;
else if (c == '*')
{
while (c = *wildnam)
{ wildnam++;
if (c == '.') break;
}
while (c = *filnam)
{ filnam++;
if (c == '.') break;
}
}
else if (c == *filnam++)
continue;
else return FALSE;
if (!*filnam)
return TRUE;
else
return FALSE;
}