makelist.c

一个很好的压缩与解压程序

#ifndef LINT
/* @(#) makelist.c 2.3 88/01/24 12:46:44 */
static char sccsid[]="@(#) makelist.c 2.3 88/01/24 12:46:44";
#endif /* LINT */

/*
Copyright (C) 1986, 1987 Rahul Dhesi -- All rights reserved
(C) Copyright 1988 Rahul Dhesi -- All rights reserved
*/

#include "options.h"
#include "portable.h"
#include "errors.i"
#include "zoo.h"
#include "zooio.h"
#include "various.h"

#include "zoofns.h"
#include "assert.h"
#include "debug.h"

char *nameptr PARMS((char *));
void modpath PARMS((char *));

/*******************/
/*
makelist() gets all pathnames corresponding to a set of filespecs and
adds them to a list.  Not more than "flistsize" pathnames are added.
Into `longest' it returns the length of the longest name added, or
zero if none added.

Files ignore1, ignore2, and ignore3 are not added to the list.
A file that is a device/directory is also not added to the list.

However, if ignore1 is NULL, both these tests are skipped and all files
will be added to the list.
*/

void makelist (argc, argv, flist, flistsize, ignore1, ignore2, ignore3, longest)
int argc;               /* number of filespec supplied */
char *argv[];           /* array of pointers to supplied filespecs */
register char *flist[]; /* array of pointers to filenames we will add */
int flistsize;          /* home many names we can use */
char *ignore1, *ignore2, *ignore3; /* files to exclude from list */
int *longest;        /* length of longest name in list */
{
   char *this_path;        /* current pathname */
   int fptr;               /* pointer to within flist */
   register int i, j;      /* loop counters */

#ifdef WILDCARD
   char *pat_name;         /* filename part of pattern */
#endif

   int gap;                /* for Shell sort */
   
   flistsize--;            /* allow for one terminating NULL entry */
   fptr = *longest = 0;

   assert(argc > 0);

#define WCLEN	4	/* length needed for wildcard, and a little extra */

   while (argc > 0) {
#ifdef WILDCARD
		int argok = 0;											/* arg not matched yet */
#endif
      char *this_arg;
		this_arg = emalloc (strlen (*argv) + WCLEN);
		strcpy (this_arg, *argv);

      /* Initialize fileset 0.  Select all files -- we will later
	 		filter out the ones wanted */
#ifdef FOLD
      str_lwr (this_arg);
#endif

#ifdef WILDCARD
      pat_name = str_dup (nameptr (this_arg));		/* pattern without path */
#ifdef VER_CH /* trailing version field */
{
   static char version_field[] = " *";
   char *p;
   p = strrchr (pat_name, VER_CH);
   if (p == NULL) {
      *version_field = VER_CH;
      pat_name = newcat (pat_name, version_field); /* adds trailing ";*" */
   }
}
#endif
		/*
		replace filename by wildcard;  however, if argument ends in slash, 
		then simply append wildcard so we get all files in that directory
		*/
#ifdef FORCESLASH
			fixslash (this_arg);				/* convert backslashes to slashes */
#endif

		if (*lastptr(this_arg) == *(char *) PATH_CH) {
			strcat (this_arg, WILDCARD);
			pat_name = "*";					/* and select all files */
		} else
#ifdef SPEC_WILD
			spec_wild (this_arg);
#else
      	strcpy (nameptr (this_arg), WILDCARD);
#endif /* SPEC_WILD */
#endif /* WILDCARD */

      nextfile (0, this_arg, 0);
      while (fptr < flistsize && 
            (this_path = nextfile(1, (char *) NULL, 0)) != NULL) {
         char *this_name = nameptr (this_path);
			modpath (this_path);					/* do any needed changes to path */

#ifdef IGNORECASE
#define	COMPARE	str_icmp
#else
#define	COMPARE	strcmp
#endif
			if (ignore1 != NULL) {
				if (samefile (this_name,ignore1)  ||    /* exclude ignored files */
					 samefile (this_name,ignore2)  ||
					 samefile (this_name,ignore3))
					continue;

#ifdef CHEKUDIR
				if (isuadir(this_path))
					continue;
#else /* CHEKUDIR */
# ifdef CHEKDIR
				if (isfdir(this_path))
					continue;
# endif /* CHEKDIR */
#endif /* CHEKUDIR */
			} /* end if ignore1 ! = NULL */

/* 
If WILDCARD is defined (e.g. AmigaDOS, MS-DOS, VAX/VMS), then nextfile()
returns all filenames and we must now select the ones we need by pattern
matching.  If WILDCARD is not defined (e.g. **IX), filenames have already been
selected by the shell and need not be tested again. 
*/
#ifdef WILDCARD
			if (match_half (this_name,pat_name) ||
				match_half (pat_name, "?-?") &&     /* character range */
					*this_name >= *pat_name && *this_name <= pat_name[2])
#endif
			{
#ifdef WILDCARD
				argok = 1;									/* remember arg matched */
#endif
				flist[fptr++] = str_dup (this_path);
				if (*longest < strlen(this_path))
					*longest = strlen(this_path);
			}

		} /* end while */
#ifdef WILDCARD
		if (argok == 0) {									/* no match for argument */
			prterror ('e', "Could not open %s\n", *argv);
		}
#endif
      argc--;
      argv++;
   }
   /* fptr is now 1 + index of last item in array */

   if (this_path != NULL && fptr >= flistsize)
      prterror ('w', too_many_files, flistsize);
#ifndef  DONT_SORT
   /* Shell sort -- K&R p. 58 */
   for (gap = fptr/2; gap > 0; gap /= 2)
      for (i = gap; i < fptr; i++)
         for (j = i - gap; j >= 0 && 
            strcmp(flist[j],flist[j+gap]) > 0; j -= gap) {
            char *t = flist[j]; flist[j] = flist[j+gap]; flist[j+gap] = t;
         }
#endif /* DONT_SORT */

   fptr--;     /* fptr is now index of last item in array */

   /* Remove duplicates */
   for (i = 0; i < fptr; i++) {
      while (i<fptr && COMPARE(flist[i],flist[i+1]) == 0) {
         for (j = i; j < fptr; j++)
            flist[j] = flist[j+1];
         fptr--;
      }
   }

   flist[++fptr] = NULL;      /* NULL entry terminates list */
}

/*******
modpath() makes any changes needed before pathname is stored;
currently these could involve folding it to lower case and
converting backslashes to forward slashes
*/

/*ARGSUSED*/
void modpath (path)
char *path;
{
#ifdef FOLD
	str_lwr (path);
#endif

#ifdef FORCESLASH
	fixslash (path);				/* convert backslashes to slashes */
#endif
}

#ifdef CHEKDIR
/* Function isfdir returns 1 if pathname is a directory else 0 */
int isfdir (this_path)
char *this_path;
{
	int dir;
	ZOOFILE f;  
	f = zooopen (this_path, Z_READ);
	if (f == NOFILE)
		return 0;
	else {
		dir = isadir(f);  zooclose(f);
	}
	return (dir);
}
#endif