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/*
** FLNORM.C - Normalize DOS file names
**
** Original Copyright 1988-1991 by Bob Stout as part of
** the MicroFirm Function Library (MFL)
**
** This subset version is functionally identical to the
** version originally published by the author in Tech Specialist
** magazine and is hereby donated to the public domain.
*/
#include <stdio.h>
#include <string.h>
#ifdef __TURBOC__
#include <dir.h>
#else
#include <direct.h>
#endif
#include <dos.h>
#include <io.h>
#define MAX_FLEN 67
#define LAST_CHAR(string) (((char *)string)[strlen(string)-1])
typedef enum {ERROR = -1, FALSE, TRUE} LOGICAL;
/*
** NOTE: Uses the following functions, also in SNIPPETS!
*/
int chdrv(int); /* In DRVALID.C */
char *unix2dos(char *); /* In UNIX2DOS.C */
char *fln_fix(char *); /* In FLN_FIX.C */
int flnorm(char *in_name, char *out_name)
{
LOGICAL dir_flag = FALSE, new_drv = FALSE, root_flag;
int status = 0, level = 0;
char *p, *out;
static char drive[2][3];
static char file[14];
static char I_am_here[MAX_FLEN];
static char I_am_there[MAX_FLEN];
static char remember[MAX_FLEN];
getcwd(I_am_here, MAX_FLEN);
if (!in_name || !in_name[0])
{
strcpy(out_name, I_am_here);
goto ERRexit;
}
strncpy(drive[0], I_am_here, 2);
drive[0][2] = '\0';
if (':' == in_name[1])
{ /* If a drive is specified */
if (chdrv(in_name[0]))
{ /* If the drive is invalid */
status = ERROR;
goto ERRexit;
}
new_drv = TRUE;
getcwd(remember, MAX_FLEN);
strncpy(drive[1], remember, 2);
drive[1][2] = '\0';
}
else
{ /* If a drive isn't specified */
if (NULL != (p = strchr(in_name, ':')))
{ /* If filename is illegal */
status = ERROR;
goto ERRexit;
}
}
unix2dos(in_name);
if (new_drv)
{
if ('\\' == in_name[2])
strcpy(out_name, drive[1]);
else
{
strcpy(out_name, remember);
if ('\\' != LAST_CHAR(remember))
strcat(out_name, "\\");
}
}
else
{
strcpy(out_name, drive[0]);
if ('\\' != *in_name)
{
strcat(out_name, I_am_here);
if ('\\' != LAST_CHAR(I_am_here))
strcat(out_name, "\\");
}
}
strcat(out_name, &in_name[(new_drv) ? 2 : 0]);
fln_fix(out_name);
out = &out_name[2];
if (!(*out))
goto ERRexit;
while ('\\' == LAST_CHAR(out))
{ /* Strip trailing `\'s */
LAST_CHAR(out_name) = '\0';
dir_flag = TRUE;
}
if (!(*out))
{
if (dir_flag)
{
strcat(out, "\\");
goto ERRexit;
}
else goto BADPATH;
}
if (NULL != (p = strrchr(out_name, '\\')))
strcpy(file, p); /* Save filename */
if (chdir(out))
{ /* If can't move to path */
if ((!dir_flag) && p)
{ /* If there was a separate path */
*p = '\0';
if (!(*out))
{ /* Back at the root, handle it */
strcpy(p, "\\");
strcpy(file, &file[1]);
}
if (chdir(out))
{ /* If we can't move to path */
*p = '\\';
goto BADPATH;
}
++level; /* Flag we stripped name */
}
else
{ /* No path as specified */
if (p)
{
BADPATH: status = ERROR;
goto ERRexit;
}
}
}
getcwd(I_am_there, MAX_FLEN); /* Get normalized path */
strupr(I_am_there);
strcpy(out_name, I_am_there);
if (level)
strcat(out_name, file);
ERRexit:
if (new_drv)
{
chdir(remember);
chdrv(I_am_here[0]);
}
chdir(I_am_here);
if (status)
out_name[0] = '\0';
return status;
}
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