acorn.c
资源名称:unzip540.zip [点击查看]
上传用户:andy_li
上传日期:2007-01-06
资源大小:1019k
文件大小:29k
源码类别:
压缩解压
开发平台:
MultiPlatform
- /*---------------------------------------------------------------------------
- acorn.c
- RISCOS-specific routines for use with Info-ZIP's UnZip 5.2 and later.
- Contains: do_wild() <-- generic enough to put in fileio.c?
- mapattr()
- mapname()
- checkdir()
- mkdir()
- isRISCOSexfield()
- setRISCOSexfield()
- printRISCOSexfield()
- close_outfile()
- stamp_file()
- version()
- ---------------------------------------------------------------------------*/
- #define UNZIP_INTERNAL
- #include "^.unzip.h"
- #include "riscos.h"
- #define FTYPE_FFF (1<<17) /* set filetype to &FFF when extracting */
- static int created_dir; /* used in mapname(), checkdir() */
- static int renamed_fullpath; /* ditto */
- extern int mkdir(const char *path, int mode);
- static int has_NFS_ext(const char *name);
- static int uxtime2acornftime(unsigned *pexadr, unsigned *pldadr, time_t ut);
- #ifndef SFX
- /**********************/
- /* Function do_wild() */ /* for porting: dir separator; match(ignore_case) */
- /**********************/
- char *do_wild(__G__ wildspec)
- __GDEF
- char *wildspec; /* only used first time on a given dir */
- {
- static DIR *dir = (DIR *)NULL;
- static char *dirname, *wildname, matchname[FILNAMSIZ];
- static int firstcall=TRUE, 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 (firstcall) { /* first call: must initialize everything */
- firstcall = FALSE;
- /* break the wildspec into a directory part and a wildcard filename */
- if ((wildname = strrchr(wildspec, '.')) == (char *)NULL) {
- dirname = ".";
- dirnamelen = 1;
- have_dirname = FALSE;
- wildname = wildspec;
- } else {
- ++wildname; /* point at character after '/' */
- dirnamelen = wildname - wildspec;
- if ((dirname = (char *)malloc(dirnamelen+1)) == (char *)NULL) {
- Info(slide, 0x201, ((char *)slide,
- "warning: cannot allocate wildcard buffersn"));
- strcpy(matchname, wildspec);
- return matchname; /* but maybe filespec was not a wildcard */
- }
- strncpy(dirname, wildspec, dirnamelen);
- dirname[dirnamelen] = ' '; /* terminate for strcpy below */
- have_dirname = TRUE;
- }
- if ((dir = opendir(dirname)) != (DIR *)NULL) {
- while ((file = readdir(dir)) != (struct dirent *)NULL) {
- if (file->d_name[0] == '/' && wildname[0] != '/')
- continue; /* Unix: '*' and '?' do not match leading dot */
- if (match(file->d_name, wildname, 0)) { /* 0 == case sens. */
- 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 = (DIR *)NULL;
- }
- /* 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 == (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)) != (struct dirent *)NULL)
- if (match(file->d_name, wildname, 0)) { /* 0 == don't 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 = (DIR *)NULL;
- firstcall = TRUE; /* reset for new wildspec */
- if (have_dirname)
- free(dirname);
- return (char *)NULL;
- } /* end function do_wild() */
- #endif /* !SFX */
- /**************************/
- /* Function has_NFS_ext() */
- /**************************/
- static int has_NFS_ext(const char* name)
- {
- int i = strlen(name) - 4;
- return (i >= 0 && name[i] == ',' && (i > 0 || name[i-1]=='/') &&
- isxdigit(name[i+1]) && isxdigit(name[i+2]) && isxdigit(name[i+3]));
- } /* end function has_NFS_ext() */
- /**********************/
- /* Function mapattr() */
- /**********************/
- int mapattr(__G)
- __GDEF
- {
- ulg tmp = G.crec.external_file_attributes;
- switch (G.pInfo->hostnum) {
- case AMIGA_:
- tmp = (unsigned)(tmp>>17 & 7); /* Amiga RWE bits */
- G.pInfo->file_attr = (unsigned)(tmp<<6 | tmp<<3 | tmp);
- break;
- case UNIX_:
- case VMS_:
- case ACORN_:
- case ATARI_:
- case BEOS_:
- case QDOS_:
- case TANDEM_:
- G.pInfo->file_attr = (unsigned)(tmp >> 16);
- if (G.pInfo->file_attr != 0 || !G.extra_field) {
- break;
- } else {
- /* Some (non-Info-ZIP) implementations of Zip for Unix and
- VMS (and probably others ??) leave 0 in the upper 16-bit
- part of the external_file_attributes field. Instead, they
- store file permission attributes in some extra field.
- As a work-around, we search for the presence of one of
- these extra fields and fall back to the MSDOS compatible
- part of external_file_attributes if one of the known
- e.f. types has been detected.
- Later, we might implement extraction of the permission
- bits from the VMS extra field. But for now, the work-around
- should be sufficient to provide "readable" extracted files.
- (For ASI Unix e.f., an experimental remap of the e.f.
- mode value IS already provided!)
- */
- ush ebID;
- unsigned ebLen;
- uch *ef = G.extra_field;
- unsigned ef_len = G.crec.extra_field_length;
- int r = FALSE;
- while (!r && ef_len >= EB_HEADSIZE) {
- ebID = makeword(ef);
- ebLen = (unsigned)makeword(ef+EB_LEN);
- if (ebLen > (ef_len - EB_HEADSIZE))
- /* discoverd some e.f. inconsistency! */
- break;
- switch (ebID) {
- case EF_ASIUNIX:
- if (ebLen >= (EB_ASI_MODE+2)) {
- G.pInfo->file_attr =
- (unsigned)makeword(ef+(EB_HEADSIZE+EB_ASI_MODE));
- /* force stop of loop: */
- ef_len = (ebLen + EB_HEADSIZE);
- break;
- }
- /* else: fall through! */
- case EF_PKVMS:
- /* "found nondecypherable e.f. with perm. attr" */
- r = TRUE;
- default:
- break;
- }
- ef_len -= (ebLen + EB_HEADSIZE);
- ef += (ebLen + EB_HEADSIZE);
- }
- if (!r)
- break;
- }
- /* fall through! */
- /* all remaining cases: expand MSDOS read-only bit into write perms */
- case FS_FAT_:
- case FS_HPFS_:
- case FS_NTFS_:
- case MAC_:
- case TOPS20_:
- default:
- tmp = !(tmp & 1) << 1; /* read-only bit --> write perms bits */
- G.pInfo->file_attr = (unsigned)(0444 | tmp<<6 | tmp<<3 | tmp);
- break;
- } /* end switch (host-OS-created-by) */
- G.pInfo->file_attr&=0xFFFF;
- G.pInfo->file_attr|=(0xFFDu<<20);
- if (has_NFS_ext(G.filename)) {
- int ftype=strtol(G.filename+strlen(G.filename)-3,NULL,16)&0xFFF;
- G.pInfo->file_attr = (G.pInfo->file_attr & 0x000FFFFF) | (ftype<<20);
- }
- else if (G.crec.internal_file_attributes & 1) {
- G.pInfo->file_attr = (G.pInfo->file_attr & 0x000FFFFF) | (0xFFFu<<20);
- }
- return 0;
- } /* end function mapattr() */
- /************************/
- /* Function mapname() */
- /************************/
- /* return 0 if no error, 1 if caution (filename */
- int mapname(__G__ renamed) /* truncated), 2 if warning (skip file because */
- __GDEF /* dir doesn't exist), 3 if error (skip file), */
- int renamed; /* or 10 if out of memory (skip file) */
- { /* [also IZ_VOL_LABEL, IZ_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 */
- int quote = FALSE; /* flags */
- int error = 0;
- register unsigned workch; /* hold the character being tested */
- char *checkswap=NULL; /* pointer the the extension to check or NULL */
- /*---------------------------------------------------------------------------
- Initialize various pointers and counters and stuff.
- ---------------------------------------------------------------------------*/
- if (G.pInfo->vollabel)
- return IZ_VOL_LABEL; /* can't set disk volume labels in RISCOS */
- /* 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 */
- /* user gave full pathname: don't prepend rootpath */
- renamed_fullpath = (renamed && (*G.filename == '/'));
- if (checkdir(__G__ (char *)NULL, INIT) == 10)
- return 10; /* initialize path buffer, unless no memory */
- *pathcomp = ' '; /* 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 (quote) { /* if character quoted, */
- *pp++ = (char)workch; /* include it literally */
- quote = FALSE;
- } else
- switch (workch) {
- case '/': /* can assume -j flag not given */
- *pp = ' ';
- if ((error = checkdir(__G__ pathcomp, APPEND_DIR)) > 1)
- return error;
- pp = pathcomp; /* reset conversion buffer for next piece */
- lastsemi = (char *)NULL; /* leave directory semi-colons alone */
- checkswap=NULL; /* reset checking when starting a new leafname */
- break;
- case ';': /* VMS version (or DEC-20 attrib?) */
- lastsemi = pp;
- *pp++ = ';'; /* keep for now; remove VMS ";##" */
- break; /* later, if requested */
- case ' 26': /* control-V quote for special chars */
- quote = TRUE; /* set flag for next character */
- break;
- case ' ': /* change spaces to hard-spaces */
- *pp++ = 160;
- break;
- case ':': /* change ':' to '