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/* MS-DOS GLOB (3C) FUNCTION

 *

 * MS-DOS GLOB FUNCTION - Copyright (c) 1990,4 Data Logic Limited.

 *

 * This code is subject to the following copyright restrictions:

 *

 * 1.  Redistribution and use in source and binary forms are permitted

 *     provided that the above copyright notice is duplicated in the

 *     source form.

 *

 *    $Header: /cvsroot/device/DEVL/UTILS/SH/GLOB.C,v 1.1 2002/08/02 06:49:31 adamy Exp $

 *

 *    $Log: GLOB.C,v $

 *    Revision 1.1  2002/08/02 06:49:31  adamy

 *    imported (reference only)

 *

 *    Revision 1.1  2001/07/20 05:55:41  ayoung

 *    WIN32 support

 *

 *    Revision 1.1.1.1  1999/12/02 01:11:12  gordonh

 *    UTIL

 *

 * Revision 2.3  1994/08/25  20:49:11  istewart

 * MS Shell 2.3 Release

 *

 * Revision 2.2  1994/02/01  10:25:20  istewart

 * Release 2.3 Beta 2, including first NT port

 *

 * Revision 2.1  1993/06/14  10:59:32  istewart

 * More changes for 223 beta

 *

 * Revision 2.0  1992/04/13  17:39:09  Ian_Stewartson

 * MS-Shell 2.0 Baseline release

 *

 */

#include <sys/types.h>			/* MS-DOS type definitions      */

#include <sys/stat.h>			/* File status definitions	*/

#include <stdio.h>			/* Standard I/O delarations     */

#include <stdlib.h>			/* Standard library functions   */

#include <string.h>			/* String library functions     */

#include <limits.h>			/* String library functions     */

#include <dirent.h>			/* Direction I/O functions	*/

#include <ctype.h>			/* Character types function	*/

#include <unistd.h>			/* Other functions		*/

#ifdef __TURBOC__

#  include <alloc.h>			/* Malloc functions		*/

#  include <dir.h>			/* Dos directory functions	*/

#else

#  include <malloc.h>			/* Malloc functions		*/

#endif

#include <glob.h>

#if defined (MSDOS) || defined (__OS2__) || defined (__TURBOC__) || defined (WIN32)

#  if defined (OS2) || defined (__OS2__)

#    define INCL_DOSDEVICES

#    define INCL_DOSMISC

#    include <os2.h>			/* OS2 functions declarations       */

#    if defined (__OS2__)

#      define DISABLE_HARD_ERRORS	DosError (FERR_DISABLEHARDERR)

#      define ENABLE_HARD_ERRORS	DosError (FERR_ENABLEHARDERR)

#    else

#      define DISABLE_HARD_ERRORS	DosError (HARDERROR_DISABLE)

#      define ENABLE_HARD_ERRORS	DosError (HARDERROR_ENABLE)

#    endif

#  elif defined (WIN32)

#  include <windows.h>

#  define DISABLE_HARD_ERRORS	SetErrorMode (0)

#  define ENABLE_HARD_ERRORS	SetErrorMode (SEM_FAILCRITICALERRORS | \

					      SEM_NOOPENFILEERRORBOX);

#  else

#    include <bios.h>			/* DOS BIOS functions		*/

#    include <dos.h>			/* DOS functions		*/

#    define DISABLE_HARD_ERRORS

#    define ENABLE_HARD_ERRORS

#  endif

#endif

/*

 * OS/2 2.x has these missing

 */

#ifndef S_IFMT

#  define	S_IFMT	0xf000	/* type of file				*/

#endif

#ifndef S_ISDIR

#  define S_ISDIR(m)	((((m) & S_IFMT) == S_IFDIR))

#endif

/*

 * Functions

 */

static int	_GP_SortCompare		_PROTO ((char **, char **));

static int	_GP_ExpandField		_PROTO ((char *, char *, glob_t *));

static int	_GP_ExpandMetaCharacters _PROTO ((char *, glob_t *));

static int	_GP_AddArgument		_PROTO ((char *, glob_t *));

static bool	_GP_MatchPattern	_PROTO ((char *, char *));

static bool	_GP_access		_PROTO ((char *, int));

static bool	_GP_stat		_PROTO ((char *, struct stat *));

static char	*_GP_MetaChars = "?*[\\";

static char	*_GP_NullString = "";

#if defined (MSDOS) || defined (__OS2__) || defined (__TURBOC__) || defined (WIN32)

static	int	_GP_GetNumberofFloppyDrives (void);

#  if defined (OS2) || defined (__OS2__) || defined (__TURBOC__) || defined (WIN32)

static void	 _dos_setdrive (unsigned int, unsigned int *);

static void	 _dos_getdrive (unsigned int *);

#  endif

static char	*_GP_CheckForMultipleDrives	_PROTO ((char *));

#endif

/*

 * There appears to be no alloca in TurboC

 */

#if defined(__TURBOC__) || defined(WIN32)

#  define alloca(x)		malloc (x)

#  define alloca_free(x)	free (x)

#else

#  define alloca_free(x)

#endif

/*

 * Free up space

 */

void	globfree (gp)

glob_t	*gp;

{

    int		i = (gp->gl_flags & GLOB_DOOFFS) ? gp->gl_offs : 0;

    while (i < gp->gl_pathc)

	free (gp->gl_pathv[i++]);

    free (gp->gl_pathv);

}

/* Main search function */

int	glob (Pattern, flags, ErrorFunction, gp)

char	*Pattern;

int	flags;

int	(*ErrorFunction) _PROTO ((char *, int));

glob_t	*gp;

{

    int		ReturnValue;

    char	*PatternCopy;

    char	*cp;

/* If no append mode - initialise */

    if (!(flags & GLOB_APPEND))

    {

	gp->gl_pathc = 0;

	gp->gl_pathv = (char **)NULL;

    }

    gp->gl_flags = flags;

    gp->gl_ef = ErrorFunction;

    if ((PatternCopy = alloca (strlen (Pattern) + 1)) == (char *)NULL)

	return GLOB_NOSPACE;

/* Expand and kill environment */

    if (ReturnValue = _GP_ExpandMetaCharacters (strcpy (PatternCopy, Pattern),

						gp))

    {

	alloca_free (PatternCopy);

	return ReturnValue;

    }

/* Check for no finds.  If add value, strip out \ from the string */

    if ((gp->gl_pathc == 0) && (flags & GLOB_NOCHECK))

    {

	cp = strcpy (PatternCopy, Pattern);

	while ((cp = strpbrk (cp, "?*[")) != (char *)NULL)

	{

	    if ((cp == PatternCopy) || (*(cp - 1) != '\\'))

		cp++;

	    else

		memmove (cp - 1, cp, strlen (cp) + 1);

	}

	if (ReturnValue = _GP_AddArgument (PatternCopy, gp))

	{

	    alloca_free (PatternCopy);

	    return ReturnValue;

	}

    }

/* Terminate string */

    if ((gp->gl_pathc != 0) &&

	(ReturnValue = _GP_AddArgument ((char *)NULL, gp)))

    {

	alloca_free (PatternCopy);

	return ReturnValue;

    }

/* Get the sort length */

    ReturnValue = (gp->gl_flags & GLOB_DOOFFS) ? gp->gl_offs : 0;

    if ((!(flags & GLOB_NOSORT)) && (gp->gl_pathc > 1))

	qsort (&gp->gl_pathv[ReturnValue], gp->gl_pathc, sizeof (char *),

	       (int (*) (const void *, const void *)) _GP_SortCompare);

    alloca_free (PatternCopy);

    return 0;

}

/* Compare function for sort */

static int	_GP_SortCompare (a1, a2)

char		**a1, **a2;

{

    return strcmp (*a1, *a2);

}

/* Expand a field if it has metacharacters in it */

static int	_GP_ExpandField (CurrentDirectoryPattern, AppendString, gp)

char		*CurrentDirectoryPattern;	/* Prefix field		*/

char		*AppendString;			/* Postfix field    	*/

glob_t		*gp;

{

    int 		i;

    int			ReturnValue = 0;	/* Return Value		*/

    char		*FullFileName;		/* Search file name	*/

    char		*FileNameStart;

    char		*MatchString;		/* Match string		*/

    DIR			*DirHandler;

    struct dirent	*CurrentDirectoryEntry;

#if defined (MSDOS) || defined (__OS2__) || defined (__TURBOC__) || defined (WIN32)

    unsigned int	CurrentDrive;		/* Current drive	*/

    unsigned int	MaxDrives;		/* Max drive		*/

    unsigned int	SelectedDrive;		/* Selected drive	*/

    unsigned int	x_drive, y_drive;	/* Dummies		*/

    char		*DriveCharacter;	/* Multi-drive flag	*/

    char		SDriveString[2];

/* Convert file name to lower case */

#  if defined (OS2) || defined (__OS2__) || (WIN32)

    if (!IsHPFSFileSystem (CurrentDirectoryPattern))

	strlwr (CurrentDirectoryPattern);

#  else

    strlwr (CurrentDirectoryPattern);

#  endif

/* Search all drives ? */

    if ((DriveCharacter = _GP_CheckForMultipleDrives (CurrentDirectoryPattern))

		!= (char *)NULL)

    {

	_dos_getdrive (&CurrentDrive);	/* Get number of drives		*/

	_dos_setdrive (CurrentDrive, &MaxDrives);

	SDriveString[1] = 0;

	for (SelectedDrive = 1; SelectedDrive <= MaxDrives; ++SelectedDrive)

	{

	    _dos_setdrive (SelectedDrive, &x_drive);

	    _dos_getdrive (&y_drive);

	    _dos_setdrive (CurrentDrive, &x_drive);

/* Check to see if the second diskette drive is really there */

	    if ((_GP_GetNumberofFloppyDrives () < 2) && (SelectedDrive == 2))

		continue;

/* If the drive exists and is in our list - process it */

	    *DriveCharacter = 0;

	    *SDriveString = (char)(SelectedDrive + 'a' - 1);

	    strlwr (CurrentDirectoryPattern);

	    if ((y_drive == SelectedDrive) &&

		_GP_MatchPattern (SDriveString, CurrentDirectoryPattern))

	    {

		if ((FullFileName = alloca (strlen (DriveCharacter) + 3))

				== (char *)NULL)

		    return GLOB_NOSPACE;

		*DriveCharacter = ':';

		*FullFileName = *SDriveString;

		strcpy (FullFileName + 1, DriveCharacter);

		i = _GP_ExpandField (FullFileName, AppendString, gp);

		alloca_free (FullFileName);

		if (i)

		    return i;

	    }

	    *DriveCharacter = ':';

	}

	return 0;

    }

#endif

/* Get the path length */

    MatchString = strrchr (CurrentDirectoryPattern, '/');

#if defined (MSDOS) || defined (__OS2__) || defined (__TURBOC__) || defined (WIN32)

    if ((MatchString == (char *)NULL) &&

	(*(CurrentDirectoryPattern + 1) == ':'))

	MatchString = CurrentDirectoryPattern + 1;

#endif

/* Set up file name for search */

    if ((MatchString == (char *)NULL) || (*MatchString == ':'))

    {

	if ((FullFileName = alloca (NAME_MAX + 7 +

				    strlen (AppendString))) == (char *)NULL)

	    return GLOB_NOSPACE;

	if (MatchString != (char *)NULL)

	    *(strcpy (FullFileName, "x:.")) = *CurrentDirectoryPattern;

	else

	    strcpy (FullFileName, ".");

	FileNameStart = FullFileName +

			(int)((MatchString != (char *)NULL) ? 2 : 0);

    }

/* Case of /<directory>/... */

    else if ((FullFileName = alloca (NAME_MAX + 4 + strlen (AppendString) +

			    (i = (int)(MatchString - CurrentDirectoryPattern))))

			== (char *)NULL)

	    return GLOB_NOSPACE;

    else

    {

	strncpy (FullFileName, CurrentDirectoryPattern, i);

	*((FileNameStart = FullFileName + i)) = 0;

	strcpy (FileNameStart++, "/");

    }

    MatchString = (MatchString == (char *)NULL) ? CurrentDirectoryPattern

						: MatchString + 1;

/* Search for file names */

    if ((DirHandler = opendir (FullFileName)) == (DIR *)NULL)

    {

	i = 0;

	if (((gp->gl_ef != NULL) && (*gp->gl_ef)(FullFileName, errno)) ||

	    (gp->gl_flags & GLOB_ERR))

	    i = GLOB_ABEND;

	alloca_free (FullFileName);

	return i;

    }

/* Are there any matches */

    while ((CurrentDirectoryEntry = readdir (DirHandler)) !=

	    (struct dirent *)NULL)

    {

	if ((*CurrentDirectoryEntry->d_name == '.') && (*MatchString != '.'))

	    continue;

/* Check for match */

	if (_GP_MatchPattern (CurrentDirectoryEntry->d_name, MatchString))

	{

	    strcpy (FileNameStart, CurrentDirectoryEntry->d_name);

/* If the postfix is not null, this must be a directory */

	    if (strlen (AppendString))

	    {

		struct stat		statb;

		char			*p;

/* If not a directory - go to the next file */

		if (!_GP_stat (FullFileName, &statb) ||

		    !S_ISDIR (statb.st_mode & S_IFMT))

		    continue;

/* Are there any metacharacters in the postfix? */

		if ((p = strpbrk (AppendString, _GP_MetaChars)) == (char *)NULL)

		{

/* No - build the file name and check it exists */

		    strcat (strcat (FileNameStart, "/"), AppendString);

		    if (_GP_access (FullFileName, F_OK) &&

			(ReturnValue = _GP_AddArgument (FullFileName, gp)))

			break;

		}

/* Yes - build the filename upto the start of the meta characters */

		else

		{

		    if ((p = strchr (p, '/')) != (char *)NULL)

			*(p++) = 0;

		    else

			p = _GP_NullString;

/* Build the new directory name and check it out */

		    strcat (strcat (FileNameStart, "/"), AppendString);

		    ReturnValue = _GP_ExpandField (FullFileName, p, gp);

		    if (p != _GP_NullString)

		       *(--p) = '/';

/* Check for errors */

		    if (ReturnValue)

			break;

		}

	    }

/* Process this file.  If error - terminate */

	    else if (_GP_access (FullFileName, F_OK) &&

		     (ReturnValue = _GP_AddArgument (FullFileName, gp)))

		break;

	}

    }

    closedir (DirHandler);

    alloca_free (FullFileName);

    return ReturnValue;

}

/* Find the location of meta-characters.  If no meta, add the argument and

 * return.  If meta characters, expand directory containing meta characters.

 */

static int	_GP_ExpandMetaCharacters (file, gp)

char		*file;

glob_t		*gp;

{

    char	*p;

    int		ReturnValue;

/* No metas - add to string */

    if ((p = strpbrk (file, _GP_MetaChars)) == (char *)NULL)

    {

	if (!_GP_access (file, F_OK))

	    return 0;

	return _GP_AddArgument (file, gp);

    }

/* Ok - metas, find the end of the start of the directory */

    else if ((p = strchr (p, '/')) != (char *)NULL)

	*(p++) = 0;

    else

	p = _GP_NullString;

/* Continue recusive match */

    ReturnValue = _GP_ExpandField (file, p, gp);

/* Restore if necessary */

    if (p != _GP_NullString)

       *(--p) = '/';

    return ReturnValue;

}

/* Add an argument to the stack - file is assumed to be a array big enough

 * for the file name + 2

 */

static int	_GP_AddArgument (file, gp)

char		*file;

glob_t		*gp;

{

    int		Offset;

    char	**p1;

    struct stat	FileStatus;

    Offset = gp->gl_pathc + ((gp->gl_flags & GLOB_DOOFFS) ? gp->gl_offs : 0);

    p1  = gp->gl_pathv;

/* Malloc space if necessary */

    if (gp->gl_pathc == 0)

	p1 = (char **)calloc (sizeof (char *), (50 + Offset));

    else if ((gp->gl_pathc % 50) == 0)

	p1 = (char **)realloc (p1, (Offset + 50) * (sizeof (char *)));

    if (p1 == (char **)NULL)

	return GLOB_NOSPACE;

/* OK got space */

    gp->gl_pathv = p1;

/* End of list ? */

    if (file == (char *)NULL)

	p1[Offset] = (char *)NULL;

    else

    {

	if ((gp->gl_flags & GLOB_MARK) && (file[strlen (file) - 1] != '/') &&

	    _GP_stat (file, &FileStatus) && (S_ISDIR (FileStatus.st_mode)))

	    strcat (file, "/");

	if ((p1[Offset] = strdup (file)) == (char *)NULL)

	    return GLOB_NOSPACE;

	strcpy (p1[Offset], file);

/* Increment counter */

	++(gp->gl_pathc);

    }

    return 0;

}

/* Check for multi_drive prefix */

#if defined (MSDOS) || defined (__OS2__) || defined (__TURBOC__) || defined (WIN32)

static char	*_GP_CheckForMultipleDrives (prefix)

char		*prefix;

{

    if (strlen (prefix) < 2)

	return (char *)NULL;

    if (((*prefix == '*') || (*prefix == '?')) && (prefix[1] == ':'))

	return prefix + 1;

    if (*prefix != '[')

	return (char *)NULL;

    while (*prefix && (*prefix != ']'))

    {

	if ((*prefix == '\\') && (*(prefix + 1)))

	    ++prefix;

	++prefix;

    }

    return (*prefix && (*(prefix + 1) == ':')) ? prefix + 1 : (char *)NULL;

}

/*

 * Some Turboc Functions to emulate MSC functions

 */

#  if defined (__TURBOC__)

static void	 _dos_getdrive (cdp)

unsigned int	*cdp;

{

    *cdp = (unsigned int)getdisk () + 1;

}

static void	 _dos_setdrive (cdr, ndp)

unsigned int	cdr;

unsigned int	*ndp;

{

   *ndp = (unsigned int)setdisk (cdr - 1);

}

#  endif

/*

 * Some OS/2 functions to emulate the DOS functions

 */

#  if defined (OS2) || defined (__OS2__)

static void	 _dos_getdrive (cdp)

unsigned int	*cdp;

{

    USHORT	cdr;

    ULONG	ndr;

    DosQCurDisk((PUSHORT)&cdr, (PULONG) &ndr);

    *cdp = (unsigned int)cdr;

}

static void	 _dos_setdrive (cdr, ndp)

unsigned int	cdr;

unsigned int	*ndp;

{

    ULONG		ulDrives;

    USHORT		usDisk;

    int			i;

    DosSelectDisk ((USHORT)cdr);

/* Get the current disk and check that to see the number of drives */

    DosQCurDisk (&usDisk, &ulDrives);        /* gets current drive        */

    for (i = 25; (!(ulDrives & (1L << i))) && (i >= 0); --i)

	continue;

    *ndp = i + 1;

}

#  elif defined (WIN32)

static void	 _dos_getdrive (cdp)

unsigned int	*cdp;

{

    char	szCurDir [MAX_PATH];

    GetCurrentDirectory (MAX_PATH, szCurDir);

    *cdp = (unsigned int)(szCurDir[0] - 'A' + 1);

}

static void	 _dos_setdrive (cdr, ndp)

unsigned int	cdr;

unsigned int	*ndp;

{

    char		szNewDrive[3];

    DWORD		dwLogicalDrives;

    unsigned int	i;

    szNewDrive[0] = cdr + 'A' - 1;

    szNewDrive[1] = ':';

    szNewDrive[2] = 0;

    *ndp = 0;

    if (!SetCurrentDirectory (szNewDrive))

	return;

    dwLogicalDrives = GetLogicalDrives ();

    for (i = 25; (!(dwLogicalDrives & (1L << i))) && i >= 0; --i)

	continue;

    *ndp = i + 1;

}

#  endif

/* Return the number of floppy disks */

#  if defined (OS2) || defined (__OS2__)

static	int	_GP_GetNumberofFloppyDrives ()

{

    BYTE	nflop = 1;

    DosDevConfig (&nflop, DEVINFO_FLOPPY, 0);

    return nflop;

}

#  elif defined (WIN32)

static	int	_GP_GetNumberofFloppyDrives ()

{

    char	szNewDrive[4];

    DWORD	dwLogicalDrives = GetLogicalDrives();

    int		LastTest = 0;

    int		i;

    strcpy (szNewDrive, "x:\\");

/* Look at each drive until we find a non-floppy which exists */

    for (i = 0; i < 25; i++)

    {

	if (dwLogicalDrives & (1L << i))

	{

	    szNewDrive[0] = i + 'A';

	    if (GetDriveType (szNewDrive) != DRIVE_REMOVABLE)

		break;

	    LastTest = i + 1;

	}

    }

    return LastTest;

}

#  elif defined (__TURBOC__)

static	int	_GP_GetNumberofFloppyDrives ()

{

    return ((biosequip () & 0x00c0) >> 6) + 1;

}

#  else

static	int	_GP_GetNumberofFloppyDrives ()

{

    return ((_bios_equiplist () & 0x00c0) >> 6) + 1;

}

#  endif

#endif

/*

 * Pattern Matching function

 */

static bool	_GP_MatchPattern (string, pattern)

char		*string;		/* String to match                  */

char		*pattern;		/* Pattern to match against         */

{

    register int	cur_s;		/* Current string character         */

    register int	cur_p;		/* Current pattern character        */

/* Match string */

    while (cur_p = *(pattern++))

    {

	cur_s = *(string++);		/* Load current string character    */

        switch (cur_p)			/* Switch on pattern character      */

        {

            case '[':			/* Match class of characters        */

            {

                while(1)

                {

                    if (!(cur_p = *(pattern++)))

			return 0;

                    if (cur_p == ']')

			return FALSE;

                    if (cur_s != cur_p)

                    {

                        if (*pattern == '-')

                        {

                            if(cur_p > cur_s)

                                continue;

                            if (cur_s > *(++pattern))

                                continue;

                        }

                        else

                            continue;

                    }

                    break;

                }

                while (*pattern)

                {

                    if (*(pattern++) == ']')

                        break;

                }

		break;

            }

            case '?':			/* Match any character              */

            {

                if (!cur_s)

		    return FALSE;

                break;

            }

            case '*':			/* Match any number of any character*/

            {

                string--;

                do

                {

                    if (_GP_MatchPattern (string, pattern))

			return TRUE;

                }

                while (*(string++));

		return FALSE;

            }

            case '\\':			/* Next character is non-meta       */

            {

                if (!(cur_p = *(pattern++)))

		    return FALSE;

            }

            default:			/* Match against current pattern    */

            {

                if (cur_p != cur_s)

		    return FALSE;

                break;

            }

        }

    }

    return (!*string) ? TRUE : FALSE;

}

/*

 * Local Stat function to do some additional checks

 */

static bool _GP_stat (char *FileName, struct stat *Status)

{

    int		rc;

    DISABLE_HARD_ERRORS;

    rc = stat (FileName, Status);

    ENABLE_HARD_ERRORS;

    return rc ? FALSE : TRUE;

}

/*

 * Local access function to do some additional checks

 */

static bool _GP_access (char *FileName, int mode)

{

    int		rc;

    DISABLE_HARD_ERRORS;

    rc = access (FileName, mode);

    ENABLE_HARD_ERRORS;

    return rc ? FALSE : TRUE;

}

/*

 * Test program

 */

#ifdef TEST

int main (int argc, char **argv)

{

    int		i;

    for (i = 0; i < argc; i++)

	printf ("Arg %d = <%s>\n", i, argv[i]);

    return 0;

}

#endif