static int pushresult (lua_State *L, int i, const char *filename) {
if (i) {
lua_pushboolean(L, 1);
return 1;
}
else {
lua_pushnil(L);
if (filename)
lua_pushfstring(L, "%s: %s", filename, zzip_strerror(zzip_errno(errno)));
else
lua_pushfstring(L, "%s", zzip_strerror(zzip_errno(errno)));
lua_pushnumber(L, zzip_errno(errno));
return 3;
}
}
/**
* This function will read(2) data from a real/zipped file.
*
* the replacement for => read(2) will fill the given buffer with bytes from
* the opened file. It will return the number of bytes read, so if the EOF
* is encountered you will be prompted with the number of bytes actually read.
*
* If the file-handle is wrapping a stat'able file then it will actually just
* perform a normal => read(2)-call, otherwise => zzip_file_read is called
* to decompress the data stream and any error is mapped to => errno(3).
*/
zzip_ssize_t
zzip_read(ZZIP_FILE * fp, char * buf, zzip_size_t len)
{
if (! fp) return 0;
if (! fp->dir)
{ return fp->io->read(fp->fd, buf, len); } /* stat fd */
else
{ register zzip_ssize_t v;
v = zzip_file_read(fp, buf, len);
if (v == -1) { errno = zzip_errno(fp->dir->errcode); }
return v;
}
}
/** => zzip_opendir
* This function uses explicit ext and io instead of the internal
* defaults, setting them to zero is equivalent to => zzip_opendir
*/
ZZIP_DIR *
zzip_opendir_ext_io(zzip_char_t * filename, int o_modes,
zzip_strings_t * ext, zzip_plugin_io_t io)
{
zzip_error_t e;
ZZIP_DIR *dir;
# ifdef ZZIP_HAVE_SYS_STAT_H
struct stat st;
# endif
if (o_modes & (ZZIP_PREFERZIP | ZZIP_ONLYZIP))
goto try_zzip;
try_real:
# ifdef ZZIP_HAVE_SYS_STAT_H
if (stat(filename, &st) >= 0 && S_ISDIR(st.st_mode))
{
if (USE_DIRENT)
{
_zzip_DIR *realdir = _zzip_opendir(filename);
if (realdir)
{
if (! (dir = (ZZIP_DIR *) calloc(1, sizeof(*dir))))
{
_zzip_closedir(realdir);
return 0;
} else
{
dir->realdir = realdir;
dir->realname = kdStrdup(filename);
return dir;
}
}
}
return 0;
}
# endif /* HAVE_SYS_STAT_H */
try_zzip:
dir = zzip_dir_open_ext_io(filename, &e, ext, io);
if (! dir && (o_modes & ZZIP_PREFERZIP))
goto try_real;
if (e)
kdSetError ( zzip_errno(e) );
return dir;
}
/**
* This function will read(2) data from a real/zipped file.
*
* the replacement for => read(2) will fill the given buffer with bytes from
* the opened file. It will return the number of bytes read, so if the EOF
* is encountered you will be prompted with the number of bytes actually read.
*
* If the file-handle is wrapping a stat'able file then it will actually just
* perform a normal => read(2)-call, otherwise => zzip_file_read is called
* to decompress the data stream and any error is mapped to => errno(3).
*/
zzip_ssize_t
zzip_read(ZZIP_FILE * fp, void *buf, zzip_size_t len)
{
if (! fp)
return 0;
if (! fp->dir)
{ return fp->io->fd.read(fp->fd, buf, len); } /* stat fd */
else
{
register zzip_ssize_t v;
v = zzip_file_read(fp, buf, len);
#ifdef ZZIP_DISABLED
if (v == -1)
{ errno = zzip_errno(fp->dir->errcode); }
#endif /* ZZIP_DISABLED */
return v;
}
}
/**
** Generate a list of files within a specified directory
**
** @param dirname Directory to read.
** @param filter Optional xdata-filter function.
** @param flp Filelist pointer.
**
** @return Pointer to FileList struct describing Files found.
*/
global int ReadDataDirectory(const char* dirname,int (*filter)(char*,FileList *),FileList **flp)
{
#ifdef USE_ZZIPLIB
ZZIP_DIR *dirp = NULL;
ZZIP_DIRENT *dp;
// ATTENTION: valid until end of file!
#define readdir zzip_readdir
#define closedir zzip_closedir
int i;
int entvalid;
char zzbasepath[PATH_MAX];
struct stat st;
char *cp;
#else
#ifndef _MSC_VER
DIR *dirp;
struct dirent *dp;
#endif
struct stat st;
#endif
#ifdef _MSC_VER
struct _finddata_t fileinfo;
long hFile;
#endif
FileList *nfl;
FileList *fl = NULL;
int n;
int isdir = 0; // silence gcc..
char *np;
char buffer[PATH_MAX];
char *filename;
strcpy(buffer, dirname);
n = strlen(buffer);
if (!n || buffer[n - 1] != '/') {
buffer[n++] = '/';
buffer[n] = 0;
}
np = buffer + n;
n = 0;
#ifdef USE_ZZIPLIB
strcpy (zzbasepath, dirname);
/* per each slash in filename, check if it there is a zzip around */
while ((cp = strrchr(zzbasepath, '/')))
{
int fd;
zzip_error_t e;
*cp = '\0'; /* cut at path separator == possible zipfile basename */
fd = __my_zzip_open_zip(zzbasepath, O_RDONLY|O_BINARY);
if (fd != -1) {
/* found zip-file, now open it */
dirp = zzip_dir_fdopen(fd, &e);
if (e) {
errno = zzip_errno(e);
close(fd);
dirp = NULL;
}
break;
}
}
if (!dirp) {
int fd;
zzip_error_t e;
// this is tricky - we used to simply zzip_opendir(dirname) here, but
// zziplib (correctly) prefers real directories over same named zipfiles
// and we want it vice versa in this special case. Otherwise it would not
// match the path separator backtrace above, which relies on recursive
// __zip_open_dir(). __zip_open_dir() only detects zipfiles, not real dirs!
fd = __my_zzip_open_zip(dirname, O_RDONLY|O_BINARY);
if (fd == -1) {
dirp = zzip_opendir(dirname);
zzbasepath[0] = 0;
} else {
dirp = zzip_dir_fdopen(fd, &e);
if (e) {
errno = zzip_errno(e);
close(fd);
dirp = NULL;
} else {
strcpy (zzbasepath, dirname);
}
DebugLevel3Fn("zzbasepath `%s', dirname `%s'\n"
_C_ zzbasepath _C_ dirname);
}
}
#ifndef _MSC_VER
IfDebug(if (!dirp) { DebugLevel0Fn("Dir `%s' not found\n" _C_ dirname); });
ZZIP_FILE*
zzip_open_shared_io (ZZIP_FILE* stream,
zzip_char_t* filename, int o_flags, int o_modes,
zzip_strings_t* ext, zzip_plugin_io_t io)
{
if (stream && stream->dir)
{
if (! ext) ext = stream->dir->fileext;
if (! io) io = stream->dir->io;
}
if (! io) io = zzip_get_default_io ();
if (o_modes & (ZZIP_PREFERZIP|ZZIP_ONLYZIP)) goto try_zzip;
try_real:
/* prefer an existing real file */
{
zzip_plugin_io_t os = (o_modes & ZZIP_ALLOWREAL)
? zzip_get_default_io () : io;
int fd = os->fd.open(filename, o_flags); /* io->fd.open */
if (fd != -1)
{
#if !defined(WINDOWSPC) || defined(__MINGW32__)
struct stat st; // JMW
#endif
ZZIP_FILE* fp = calloc (1, sizeof(ZZIP_FILE));
if (! fp) {
os->fd.close(fd);
return 0;
} /* io->fd.close */
fp->dir = NULL;
fp->fd = fd;
fp->io = os;
#if !defined(WINDOWSPC) || defined(__MINGW32__)
if (stat(filename,&st) >=0)
fp->usize = st.st_size;
#else
fp->usize = os->fd.filesize(fd);
#endif
return fp;
}
if (o_modes & ZZIP_PREFERZIP) {
return 0;
}
}
try_zzip:
/* if the user had it in place of a normal xopen, then
* we better defend this lib against illegal usage */
if (o_flags & (O_CREAT|O_WRONLY)) {
errno = EINVAL;
return 0;
}
if (o_flags & (O_RDWR)) {
o_flags ^= O_RDWR;
o_flags |= O_RDONLY;
}
/* this is just for backward compatibility -and strictly needed to
* prepare ourselves for more options and more options later on... */
/*# if (o_modes & ZZIP_CASELESS) { o_flags |= ZZIP_CASEINSENSITIVE; } */
/*# if (o_modes & ZZIP_NOPATHS) { o_flags |= ZZIP_IGNOREPATH; } */
/* see if we can open a file that is a zip file */
{ char basename[PATH_MAX];
char* p;
int filename_len = strlen (filename);
if (filename_len >= PATH_MAX) {
#ifdef ENAMETOOLONG
errno = ENAMETOOLONG;
#endif
return 0;
}
memcpy (basename, filename, filename_len+1);
/* see if we can share the same zip directory */
if (stream && stream->dir && stream->dir->realname)
{
zzip_size_t len = strlen (stream->dir->realname);
if (! memcmp (filename, stream->dir->realname, len) &&
((filename[len] == '/') || (filename[len] == '\\'))
&& filename[len+1])
{
ZZIP_FILE* fp =
zzip_file_open (stream->dir, filename+len+1, o_modes);
if (! fp) {
errno = zzip_errno (stream->dir->errcode);
}
return fp;
}
}
/* per each slash in filename, check if it there is a zzip around */
while ((p = strrchr (basename, '/')) || (p = strrchr (basename, '\\')))
{
zzip_error_t e = 0;
ZZIP_DIR* dir;
ZZIP_FILE* fp;
int fd;
*p = '\0'; /* cut at path separator == possible zipfile basename */
fd = __zzip_try_open (basename, o_flags|O_RDONLY|O_BINARY, ext, io);
if (fd == -1) {
continue;
}
/* found: */
/* found zip-file, now try to parse it */
dir = zzip_dir_fdopen_ext_io(fd, &e, ext, io);
if (e) {
errno = zzip_errno(e);
io->fd.close(fd);
return 0;
}
/* (p - basename) is the lenghtof zzip_dir part of the filename */
fp = zzip_file_open(dir, filename + (p - basename) +1, o_modes);
if (! fp) {
errno = zzip_errno(dir->errcode);
}
else {
if (! dir->realname) dir->realname = strdup (basename);
}
zzip_dir_close(dir);
/* note: since (fp) is attached that (dir) will survive */
/* but (dir) is implicitly closed on next zzip_close(fp) */
return fp;
} /*again*/
if (o_modes & ZZIP_PREFERZIP) goto try_real;
errno = ENOENT;
return 0;
}
}
/**
* open an => ZZIP_FILE from an already open => ZZIP_DIR handle. Since
* we have a chance to reuse a cached => buf32k and => ZZIP_FILE memchunk
* this is the best choice to unpack multiple files.
*
* Note: the zlib supports 2..15 bit windowsize, hence we provide a 32k
* memchunk here... just to be safe.
*/
ZZIP_FILE *
zzip_file_open(ZZIP_DIR * dir, zzip_char_t* name, int o_mode)
{
zzip_error_t err = 0;
struct zzip_file * fp = 0;
struct zzip_dir_hdr * hdr = dir->hdr0;
int (*cmp)(zzip_char_t*, zzip_char_t*);
cmp = (o_mode & ZZIP_CASELESS)? dirsep_casecmp: strcmp;
if (! dir || !dir->fd || dir->fd == -1 ) return 0;
if (o_mode & ZZIP_NOPATHS)
{
register zzip_char_t* n = dirsep_strrchr(name, '/');
if (n) name = n + 1;
}
if (hdr)
while (1)
{
register zzip_char_t* hdr_name = hdr->d_name;
if (o_mode & ZZIP_NOPATHS)
{
register zzip_char_t* n = dirsep_strrchr(hdr_name, '/');
if (n) hdr_name = n + 1;
}
HINT4("name='%s', compr=%d, size=%d\n",
hdr->d_name, hdr->d_compr, hdr->d_usize);
if (!cmp(hdr_name, name))
{
switch (hdr->d_compr)
{
case 0: /* store */
case 8: /* inflate */
break;
default:
{ err = ZZIP_UNSUPP_COMPR; goto error; }
}
if (dir->cache.fp)
{
fp = dir->cache.fp; dir->cache.fp = NULL;
/* memset(zfp, 0, sizeof *fp); cleared in zzip_file_close() */
}else
{
if (! (fp = (ZZIP_FILE *)calloc(1, sizeof(*fp))))
{ err = ZZIP_OUTOFMEM; goto error; }
}
fp->dir = dir;
fp->io = dir->io;
dir->refcount++;
if (dir->cache.buf32k)
{ fp->buf32k = dir->cache.buf32k; dir->cache.buf32k = NULL; }
else
{
if (! (fp->buf32k = (char *)malloc(ZZIP_32K)))
{ err = ZZIP_OUTOFMEM; goto error; }
}
/*
* In order to support simultaneous open files in one zip archive
* we'll fix the fd offset when opening new file/changing which
* file to read...
*/
if (zzip_file_saveoffset(dir->currentfp) < 0)
{ err = ZZIP_DIR_SEEK; goto error; }
fp->offset = hdr->d_off;
dir->currentfp = fp;
if (dir->io->seeks(dir->fd, hdr->d_off, SEEK_SET) < 0)
{ err = ZZIP_DIR_SEEK; goto error; }
{ /* skip local header - should test tons of other info,
* but trust that those are correct */
zzip_ssize_t dataoff;
struct zzip_file_header * p = (void*) fp->buf32k;
dataoff = dir->io->read(dir->fd, (void*)p, sizeof(*p));
if (dataoff < (zzip_ssize_t)sizeof(*p))
{ err = ZZIP_DIR_READ; goto error; }
if (! ZZIP_FILE_HEADER_CHECKMAGIC(p)) /* PK\3\4 */
{ err = ZZIP_CORRUPTED; goto error; }
dataoff = ZZIP_GET16(p->z_namlen) + ZZIP_GET16(p->z_extras);
if (dir->io->seeks(dir->fd, dataoff, SEEK_CUR) < 0)
{ err = ZZIP_DIR_SEEK; goto error; }
fp->dataoffset = dir->io->tells(dir->fd);
fp->usize = hdr->d_usize;
fp->csize = hdr->d_csize;
}
err = zzip_inflate_init (fp, hdr);
if (err) { goto error; }
return fp;
}else
{
if (hdr->d_reclen == 0)
break;
hdr = (struct zzip_dir_hdr *)((char *)hdr + hdr->d_reclen);
}/*cmp name*/
}/*forever*/
dir->errcode = ZZIP_ENOENT; zzip_errno(ZZIP_ENOENT);
return NULL;
error:
if (fp) zzip_file_close(fp);
dir->errcode = err; zzip_errno(err);
return NULL;
}
