human68k.c

压缩解压,是unzip540的升级,这个外国网站摘来的源码,是evb编写.

/*
  Copyright (c) 1990-2005 Info-ZIP.  All rights reserved.

  See the accompanying file LICENSE, version 2000-Apr-09 or later
  (the contents of which are also included in unzip.h) for terms of use.
  If, for some reason, all these files are missing, the Info-ZIP license
  also may be found at:  ftp://ftp.info-zip.org/pub/infozip/license.html
*/
/*---------------------------------------------------------------------------

  human68k.c

  Human68k-specific routines for use with Info-ZIP's UnZip 5.41 and later.

  Contains:  do_wild()
             mapattr()
             mapname()
             checkdir()
             close_outfile()
             stamp_file()                   (TIMESTAMP only)
             version()
             main()                         (for UnZipSFX)

  ---------------------------------------------------------------------------*/


#include <dirent.h>
#include <string.h>
#include <sys/dos.h>
#include <sys/xunistd.h>
#ifdef HAVE_TWONCALL_H
#include <twoncall.h>
#endif
#define UNZIP_INTERNAL
#include "unzip.h"

#if defined (SFX) && defined (MAIN)
#include <sys/xstart.h>
int MAIN(int argc, char *argv[]);
#endif

static void map2fat(char *pathcomp, char *last_dot);
static char *trunc_name(char *name, int maxlen);

static int created_dir;        /* used in mapname(), checkdir() */
static int renamed_fullpath;   /* ditto */

static char multi_period, special_char;

#ifndef SFX

/**********************/
/* Function do_wild() */
/**********************/

char *do_wild(__G__ wildspec)
    __GDEF
    ZCONST char *wildspec;  /* only used first time on a given dir */
{
    static DIR *wild_dir = (DIR *)NULL;
    static ZCONST char *wildname;
    static char *dirname, matchname[FILNAMSIZ];
    static int notfirstcall=FALSE, have_dirname, dirnamelen;
    struct dirent *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 (!notfirstcall) {    /* first call:  must initialize everything */
        notfirstcall = TRUE;

        if (!iswild(wildspec)) {
            strncpy(matchname, wildspec, FILNAMSIZ);
            matchname[FILNAMSIZ-1] = '\0';
            have_dirname = FALSE;
            wild_dir = (DIR *)NULL;
            return matchname;
        }

        /* break the wildspec into a directory part and a wildcard filename */
        if ((wildname = strrchr(wildspec, '/')) == NULL) {
            dirname = ".";
            dirnamelen = 1;
            have_dirname = FALSE;
            wildname = wildspec;
        } else {
            ++wildname;     /* point at character after '/' */
            dirnamelen = wildname - wildspec;
            if ((dirname = (char *)malloc(dirnamelen+1)) == NULL) {
                Info(slide, 1, ((char *)slide,
                  "warning:  cannot 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", FnFilter1(dirname)));

        if ((wild_dir = opendir(dirname)) != (DIR *)NULL) {
            while ((file = readdir(wild_dir)) != (struct dirent *)NULL) {
                Trace((stderr, "do_wild:  readdir returns %s\n",
                  FnFilter1(file->d_name)));
                if (file->d_name[0] == '.' && wildname[0] != '.')
                    continue; /* Unix:  '*' and '?' do not match leading dot */
                if (match(file->d_name, wildname, 0 WISEP) && /* 0=case sens.*/
                    /* skip "." and ".." directory entries */
                    strcmp(file->d_name, ".") && strcmp(file->d_name, "..")) {
                    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(wild_dir);
            wild_dir = (DIR *)NULL;
        }
#ifdef DEBUG
        else {
            Trace((stderr, "do_wild:  Opendir(%s) returns NULL\n",
              FnFilter1(dirname)));
        }
#endif /* DEBUG */

        /* return the raw wildspec in case that works (e.g., directory not
         * searchable, but filespec was not wild and file is readable) */
        strncpy(matchname, wildspec, FILNAMSIZ);
        matchname[FILNAMSIZ-1] = '\0';
        return matchname;
    }

    /* last time through, might have failed opendir but returned raw wildspec */
    if (wild_dir == (DIR *)NULL) {
        notfirstcall = FALSE; /* 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(wild_dir)) != (struct dirent *)NULL) {
        Trace((stderr, "do_wild:  readdir returns %s\n",
          FnFilter1(file->d_name)));
        if (file->d_name[0] == '.' && wildname[0] != '.')
            continue;   /* Unix:  '*' and '?' do not match leading dot */
        if (match(file->d_name, wildname, 0 WISEP)) {   /* 0 == case sens. */
            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;
        }
    }

    closedir(wild_dir);     /* have read at least one entry; nothing left */
    wild_dir = (DIR *)NULL;
    notfirstcall = FALSE;   /* reset for new wildspec */
    if (have_dirname)
        free(dirname);
    return (char *)NULL;

} /* end function do_wild() */

#endif /* !SFX */




/**********************/
/* Function mapattr() */
/**********************/

int mapattr(__G)
    __GDEF
{
    ulg  tmp = G.crec.external_file_attributes;

    switch (G.pInfo->hostnum) {
        case UNIX_:
            if (tmp & 0xff)
                break;
            /* fall through */
        case VMS_:
        case ACORN_:
        case ATARI_:
        case ATHEOS_:
        case BEOS_:
        case QDOS_:
            G.pInfo->file_attr = _mode2dos(tmp >> 16);
            return 0;
        default:
            break;
    }

    /* set archive bit (file is not backed up) */
    if((tmp & 0x08) == 0)
        tmp |= 0x20;
    G.pInfo->file_attr = tmp & 0xff;
    return 0;

} /* end function mapattr() */





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

int mapname(__G__ renamed)
    __GDEF
    int renamed;
/*
 * returns:
 *  MPN_OK          - no problem detected
 *  MPN_INF_TRUNC   - caution (truncated filename)
 *  MPN_INF_SKIP    - info "skip entry" (dir doesn't exist)
 *  MPN_ERR_SKIP    - error -> skip entry
 *  MPN_ERR_TOOLONG - error -> path is too long
 *  MPN_NOMEM       - error (memory allocation failed) -> skip entry
 *  [also MPN_VOL_LABEL, MPN_CREATED_DIR]
 */
{
    char pathcomp[FILNAMSIZ];      /* path-component buffer */
    char *pp, *cp=(char *)NULL;    /* character pointers */
    char *lastsemi=(char *)NULL;   /* pointer to last semi-colon in pathcomp */
    char *last_dot=(char *)NULL;   /* last dot */
    int error = MPN_OK;
    register unsigned workch;      /* hold the character being tested */

#ifdef HAVE_TWONCALL_H
    static char twentyone_flag;

    /* Get TwentyOne options */
    if (twentyone_flag == 0) {
        twentyone_flag++;
        if (GetTwentyOneID () == TWON_ID) {
            int flags = GetTwentyOneOptions ();

            if (flags & (1 << TWON_PERIOD_BIT))
                multi_period = TRUE;
            if (flags & (1 << TWON_SPECIAL_BIT))
                special_char = TRUE;
        }
    }
#endif

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

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

    created_dir = FALSE;        /* not yet */
    renamed_fullpath = FALSE;

    if (renamed) {
        cp = G.filename - 1;    /* point to beginning of renamed name... */
        while (*++cp)
            if (*cp == '\\')    /* convert backslashes to forward */
                *cp = '/';
        cp = G.filename;
        if ((G.filename[0] == '/')
         || (isalpha(G.filename[0]) && G.filename[1] == ':')) {
            /* user gave full pathname:  don't prepend rootpath */
            renamed_fullpath = TRUE;
        }
    }

    if ((error = checkdir(__G__ (char *)NULL, INIT)) != 0)
        return error;           /* initialize path buffer, unless no memory */

    *pathcomp = '\0';           /* initialize translation buffer */
    pp = pathcomp;              /* point to translation buffer */
    if (uO.jflag)               /* junking directories */
        cp = (char *)strrchr(G.filename, '/');
    if (cp == (char *)NULL)     /* no '/' or not junking dirs */
        cp = G.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 (_ismbblead((unsigned char)workch)) {
            if (*cp) {
                *pp++ = (char)workch;
                *pp++ = (char)*cp++;
            }
            else
                *pp++ = '_';
            continue;
        }

        switch (workch) {
            case '/':             /* can assume -j flag not given */
                *pp = '\0';
                map2fat(pathcomp, last_dot);   /* 18.3 trunc. (in place) */
                if (strcmp(pathcomp, ".") == 0) {
                    /* don't bother appending "./" to the path */
                    *pathcomp = '\0';
                } else if (!uO.ddotflag && strcmp(pathcomp, "..") == 0) {
                    /* "../" dir traversal detected, skip over it */
                    *pathcomp = '\0';
                    killed_ddot = TRUE;     /* set "show message" flag */
                }
                /* when path component is not empty, append it now */
                if (*pathcomp != '\0' &&
                    ((error = checkdir(__G__ pathcomp, APPEND_DIR))