nt.c

压缩算法的源代码

            rootpath[rootlen] = '\0';
        }
        Trace((stderr, "rootpath now = [%s]\n", rootpath));
        return 0;
    }
#endif /* !SFX || SFX_EXDIR */

/*---------------------------------------------------------------------------
    END:  free rootpath, immediately prior to program exit.
  ---------------------------------------------------------------------------*/

    if (FUNCTION == END) {
        Trace((stderr, "freeing rootpath\n"));
        if (rootlen > 0)
            free(rootpath);
        return 0;
    }

    return 99;  /* should never reach */

} /* end function checkdir() */




#ifndef SFX

/************************/
/*  Function do_wild()  */   /* identical to OS/2 version */
/************************/

char *do_wild(wildspec)
    char *wildspec;         /* only used first time on a given dir */
{
    static struct direct *dir = NULL;
    static char *dirname, *wildname, matchname[FILNAMSIZ];
    static int firstcall=TRUE, have_dirname, dirnamelen;
    struct direct *file;


    /* Even when we're just returning wildspec, we *always* do so in
     * matchname[]--calling routine is allowed to append four characters
     * to the returned string, and wildspec may be a pointer to argv[].
     */
    if (firstcall) {        /* first call:  must initialize everything */
        firstcall = FALSE;

        /* break the wildspec into a directory part and a wildcard filename */
        if ((wildname = strrchr(wildspec, '/')) == NULL &&
            (wildname = strrchr(wildspec, ':')) == NULL) {
            dirname = ".";
            dirnamelen = 1;
            have_dirname = FALSE;
            wildname = wildspec;
        } else {
            ++wildname;     /* point at character after '/' or ':' */
            dirnamelen = wildname - wildspec;
            if ((dirname = (char *)malloc(dirnamelen+1)) == NULL) {
                FPRINTF(stderr, "warning:  can't allocate wildcard buffers\n");
                strcpy(matchname, wildspec);
                return matchname;   /* but maybe filespec was not a wildcard */
            }
            strncpy(dirname, wildspec, dirnamelen);
            dirname[dirnamelen] = '\0';   /* terminate for strcpy below */
            have_dirname = TRUE;
        }
        Trace((stderr, "do_wild:  dirname = [%s]\n", dirname));

        if ((dir = opendir(dirname)) != NULL) {
            while ((file = readdir(dir)) != NULL) {
                Trace((stderr, "do_wild:  readdir returns %s\n", file->d_name));
                if (match(file->d_name, wildname, 1)) {  /* 1 == ignore case */
                    Trace((stderr, "do_wild:  match() succeeds\n"));
                    if (have_dirname) {
                        strcpy(matchname, dirname);
                        strcpy(matchname+dirnamelen, file->d_name);
                    } else
                        strcpy(matchname, file->d_name);
                    return matchname;
                }
            }
            /* if we get to here directory is exhausted, so close it */
            closedir(dir);
            dir = NULL;
        }
        Trace((stderr, "do_wild:  opendir(%s) returns NULL\n", dirname));

        /* return the raw wildspec in case that works (e.g., directory not
         * searchable, but filespec was not wild and file is readable) */
        strcpy(matchname, wildspec);
        return matchname;
    }

    /* last time through, might have failed opendir but returned raw wildspec */
    if (dir == NULL) {
        firstcall = TRUE;  /* nothing left to try--reset for new wildspec */
        if (have_dirname)
            free(dirname);
        return (char *)NULL;
    }

    /* If we've gotten this far, we've read and matched at least one entry
     * successfully (in a previous call), so dirname has been copied into
     * matchname already.
     */
    while ((file = readdir(dir)) != NULL)
        if (match(file->d_name, wildname, 1)) {   /* 1 == ignore case */
            if (have_dirname) {
                /* strcpy(matchname, dirname); */
                strcpy(matchname+dirnamelen, file->d_name);
            } else
                strcpy(matchname, file->d_name);
            return matchname;
        }

    closedir(dir);     /* have read at least one dir entry; nothing left */
    dir = NULL;
    firstcall = TRUE;  /* reset for new wildspec */
    if (have_dirname)
        free(dirname);
    return (char *)NULL;

} /* end function do_wild() */

#endif /* !SFX */




/************************/
/*  Function mapname()  */
/************************/

/*
 * There are presently two possibilities in OS/2:  the output filesystem is
 * FAT, or it is HPFS.  If the former, we need to map to FAT, obviously, but
 * we *also* must map to HPFS and store that version of the name in extended
 * attributes.  Either way, we need to map to HPFS, so the main mapname
 * routine does that.  In the case that the output file system is FAT, an
 * extra filename-mapping routine is called in checkdir().  While it should
 * be possible to determine the filesystem immediately upon entry to mapname(),
 * it is conceivable that the DOS APPEND utility could be added to OS/2 some-
 * day, allowing a FAT directory to be APPENDed to an HPFS drive/path.  There-
 * fore we simply check the filesystem at each path component.
 *
 * Note that when alternative IFS's become available/popular, everything will
 * become immensely more complicated.  For example, a Minix filesystem would
 * have limited filename lengths like FAT but no extended attributes in which
 * to store the longer versions of the names.  A BSD Unix filesystem would
 * support paths of length 1024 bytes or more, but it is not clear that FAT
 * EAs would allow such long .LONGNAME fields or that OS/2 would properly
 * restore such fields when moving files from FAT to the new filesystem.
 *
 * GRR:  some or all of the following chars should be checked in either
 *       mapname (HPFS) or map2fat (FAT), depending:  ,=^+'"[]<>|\t&
 */

int mapname(renamed)  /* return 0 if no error, 1 if caution (filename trunc), */
    int renamed;      /* 2 if warning (skip file because dir doesn't exist), */
{                     /* 3 if error (skip file), 10 if no memory (skip file), */
                      /* IZ_VOL_LABEL if can't do vol label, IZ_CREATED_DIR */
    char pathcomp[FILNAMSIZ];   /* path-component buffer */
    char *pp, *cp=NULL;         /* character pointers */
    char *lastsemi = NULL;      /* pointer to last semi-colon in pathcomp */
    int quote = FALSE;          /* flag:  next char is literal */
    int error = 0;
    register unsigned workch;   /* hold the character being tested */


/*---------------------------------------------------------------------------
    Initialize various pointers and counters and stuff.
  ---------------------------------------------------------------------------*/

    /* can create path as long as not just freshening, or if user told us */
    create_dirs = (!fflag || renamed);

    created_dir = FALSE;        /* not yet */
    renamed_fullpath = FALSE;
    fnlen = strlen(filename);

    if (renamed) {
        cp = filename - 1;      /* point to beginning of renamed name... */
        while (*++cp)
            if (*cp == '\\')    /* convert backslashes to forward */
                *cp = '/';
        cp = filename;
        /* use temporary rootpath if user gave full pathname */
        if (filename[0] == '/') {
            renamed_fullpath = TRUE;
            pathcomp[0] = '/';  /* copy the '/' and terminate */
            pathcomp[1] = '\0';
            ++cp;
        } else if (isalpha(filename[0]) && filename[1] == ':') {
            renamed_fullpath = TRUE;
            pp = pathcomp;
            *pp++ = *cp++;      /* copy the "d:" (+ '/', possibly) */
            *pp++ = *cp++;
            if (*cp == '/')
                *pp++ = *cp++;  /* otherwise add "./"? */
            *pp = '\0';
        }
    }

    /* pathcomp is ignored unless renamed_fullpath is TRUE: */
    if ((error = checkdir(pathcomp, INIT)) != 0)    /* initialize path buffer */
        return error;           /* ...unless no mem or vol label on hard disk */

    *pathcomp = '\0';           /* initialize translation buffer */
    pp = pathcomp;              /* point to translation buffer */
    if (!renamed) {             /* cp already set if renamed */
        if (jflag)              /* junking directories */
            cp = (char *)strrchr(filename, '/');
        if (cp == NULL)             /* no '/' or not junking dirs */
            cp = filename;          /* point to internal zipfile-member pathname */
        else
            ++cp;                   /* point to start of last component of path */
    }

/*---------------------------------------------------------------------------
    Begin main loop through characters in filename.
  ---------------------------------------------------------------------------*/

    while ((workch = (uch)*cp++) != 0) {

        if (quote) {              /* if character quoted, */
            *pp++ = (char)workch; /*  include it literally */
            quote = FALSE;
        } else
            switch (workch) {
            case '/':             /* can assume -j flag not given */
                *pp = '\0';
                if ((error = checkdir(pathcomp, APPEND_DIR)) > 1)
                    return error;
                pp = pathcomp;    /* reset conversion buffer for next piece */
                lastsemi = NULL;  /* leave directory semi-colons alone */
                break;

            case ':':
                *pp++ = '_';      /* drive names not stored in zipfile, */
                break;            /*  so no colons allowed */

            case ';':             /* start of VMS version? */
                lastsemi = pp;    /* remove VMS version later... */
                *pp++ = ';';      /*  but keep semicolon for now */
                break;

            case '\026':          /* control-V quote for special chars */
                quote = TRUE;     /* set flag for next character */
                break;

            case ' ':             /* keep spaces unless specifically */
                /* NT cannot create filenames with spaces on FAT volumes */
                if (sflag || IsVolumeOldFAT(filename))
                    *pp++ = '_';
                else
                    *pp++ = ' ';
                break;

            default:
                /* allow European characters in filenames: */
                if (isprint(workch) || (128 <= workch && workch <= 254))
                    *pp++ = (char)workch;
            } /* end switch */

    } /* end while loop */

    *pp = '\0';                   /* done with pathcomp:  terminate it */

    /* if not saving them, remove VMS version numbers (appended "###") */
    if (!V_flag && lastsemi) {
        pp = lastsemi + 1;        /* semi-colon was kept:  expect #'s after */
        while (isdigit((uch)(*pp)))
            ++pp;
        if (*pp == '\0')          /* only digits between ';' and end:  nuke */
            *lastsemi = '\0';
    }

/*---------------------------------------------------------------------------
    Report if directory was created (and no file to create:  filename ended
    in '/'), check name to be sure it exists, and combine path and name be-
    fore exiting.
  ---------------------------------------------------------------------------*/

    if (filename[fnlen-1] == '/') {
        checkdir(filename, GETPATH);
        if (created_dir && QCOND2) {
/* GRR:  trailing '/'?  need to strip or not? */
            FPRINTF(stdout, "   creating: %-22s\n", filename);
            /* HG: are we setting the date&time on a newly created dir?  */
            /*     Not quite sure how to do this. It does not seem to    */
            /*     be done in the MS-DOS version of mapname().           */
            return IZ_CREATED_DIR;   /* dir time already set */
        }
        return 2;   /* dir existed already; don't look for data to extract */
    }

    if (*pathcomp == '\0') {
        FPRINTF(stderr, "mapname:  conversion of %s failed\n", filename);
        return 3;
    }

    checkdir(pathcomp, APPEND_NAME);   /* returns 1 if truncated:  care? */
    checkdir(filename, GETPATH);
    Trace((stderr, "mapname returns with filename = [%s] (error = %d)\n\n",
      filename, error));

    if (pInfo->vollabel) {   /* set the volume label now */
        char drive[3];

        /* Build a drive string, e.g. "b:" */
        drive[0] = 'a' + nLabelDrive - 1;
        drive[1] = ':';
        drive[2] = '\0';
        if (QCOND2)
            FPRINTF(stdout, "labelling %s %-22s\n", drive, filename);
        if (!SetVolumeLabel(drive, filename)) {
            FPRINTF(stderr, "mapname:  error setting volume label\n");
            return 3;
        }
        return 2;   /* success:  skip the "extraction" quietly */
    }

    return error;

} /* end function mapname() */





#ifndef SFX

/************************/
/*  Function version()  */
/************************/

void version()
{
    extern char Far  CompiledWith[];
#if defined(_MSC_VER)
    char buf[80];
#endif

    PRINTF(LoadFarString(CompiledWith),

#ifdef _MSC_VER  /* MSC == VC++, but what about SDK compiler? */
      (sprintf(buf, "Microsoft C %d.%02d ", _MSC_VER/100, _MSC_VER%100), buf),
#  if (_MSC_VER >= 800)
        "(Visual C++)",
#  else
        "(bad version)",
#  endif
#else
      "unknown compiler (SDK?)", "",
#endif

      "Windows NT", " (32-bit)",

#ifdef __DATE__
      " on ", __DATE__
#else
      "", ""
#endif
      );

    return;

} /* end function version() */

#endif /* !SFX */