forked from SWI-Prolog/packages-archive
/
archive4pl.c
1067 lines (916 loc) · 26.4 KB
/
archive4pl.c
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/* Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: J.Wielemaker@uva.nl
WWW: http://www.swi-prolog.org
Copyright (C): 2012-2014, VU University Amsterdam
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include <SWI-Stream.h>
#include <SWI-Prolog.h>
#ifdef __WINDOWS__
#define LIBARCHIVE_STATIC 1
#endif
#include <archive.h>
#include <archive_entry.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#else /* assume complete recent libarchive */
#define HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_BZIP2 1
#define HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_COMPRESS 1
#define HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_GZIP 1
#define HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_LZMA 1
#define HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_NONE 1
#define HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_XZ 1
#define HAVE_ARCHIVE_READ_SUPPORT_FORMAT_AR 1
#define HAVE_ARCHIVE_READ_SUPPORT_FORMAT_CPIO 1
#define HAVE_ARCHIVE_READ_SUPPORT_FORMAT_EMPTY 1
#define HAVE_ARCHIVE_READ_SUPPORT_FORMAT_ISO9660 1
#define HAVE_ARCHIVE_READ_SUPPORT_FORMAT_MTREE 1
#define HAVE_ARCHIVE_READ_SUPPORT_FORMAT_RAW 1
#define HAVE_ARCHIVE_READ_SUPPORT_FORMAT_TAR 1
#define HAVE_ARCHIVE_READ_SUPPORT_FORMAT_ZIP 1
#define HAVE_ARCHIVE_READ_FREE 1
#endif
#ifndef HAVE_ARCHIVE_READ_FREE
#define archive_read_free(ar) archive_read_finish(ar)
#endif
#if ARCHIVE_VERSION_NUMBER < 3000000
#define archive_read_support_filter_all archive_read_support_compression_all
#ifdef HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_BZIP2
#define HAVE_ARCHIVE_READ_SUPPORT_FILTER_BZIP2 1
#define archive_read_support_filter_bzip2 archive_read_support_compression_bzip2
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_COMPRESS
#define HAVE_ARCHIVE_READ_SUPPORT_FILTER_COMPRESS
#define archive_read_support_filter_compress archive_read_support_compression_compress
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_GZIP
#define HAVE_ARCHIVE_READ_SUPPORT_FILTER_GZIP
#define archive_read_support_filter_gzip archive_read_support_compression_gzip
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_LZMA
#define HAVE_ARCHIVE_READ_SUPPORT_FILTER_LZMA
#define archive_read_support_filter_lzma archive_read_support_compression_lzma
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_NONE
#define HAVE_ARCHIVE_READ_SUPPORT_FILTER_NONE
#define archive_read_support_filter_none archive_read_support_compression_none
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_COMPRESSION_XZ
#define HAVE_ARCHIVE_READ_SUPPORT_FILTER_XZ
#define archive_read_support_filter_xz archive_read_support_compression_xz
#endif
#endif /*ARCHIVE_VERSION_NUMBER < 3000000*/
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Design of the libarchive interface
An archive is represented by a symbol (blob). The C-structure contains
the archive, the current header and some state information.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#define ARCHIVE_MAGIC 348184378
typedef enum ar_status
{ AR_VIRGIN = 0,
AR_OPENED,
AR_NEW_ENTRY,
AR_OPENED_ENTRY,
AR_CLOSED_ENTRY
} ar_status;
typedef struct archive_wrapper
{ atom_t symbol; /* Associated symbol */
IOSTREAM * data; /* Input data */
unsigned int type; /* Type of format supported */
int magic; /* magic code */
ar_status status; /* Current status */
int close_parent; /* Close the parent handle */
int closed_archive; /* Archive was closed with open entry */
struct archive * archive; /* Actual archive handle */
struct archive_entry *entry; /* Current entry */
} archive_wrapper;
static void free_archive(archive_wrapper *ar);
/*******************************
* CONSTANTS *
*******************************/
static atom_t ATOM_close_parent;
static atom_t ATOM_compression;
static atom_t ATOM_filter;
static atom_t ATOM_format;
static atom_t ATOM_all;
static atom_t ATOM_bzip2;
static atom_t ATOM_compress;
static atom_t ATOM_gzip;
static atom_t ATOM_grzip;
static atom_t ATOM_lrzip;
static atom_t ATOM_lzip;
static atom_t ATOM_lzma;
static atom_t ATOM_lzop;
static atom_t ATOM_none;
static atom_t ATOM_rpm;
static atom_t ATOM_uu;
static atom_t ATOM_xz;
static atom_t ATOM_7zip;
static atom_t ATOM_ar;
static atom_t ATOM_cab;
static atom_t ATOM_cpio;
static atom_t ATOM_empty;
static atom_t ATOM_gnutar;
static atom_t ATOM_iso9960;
static atom_t ATOM_lha;
static atom_t ATOM_mtree;
static atom_t ATOM_rar;
static atom_t ATOM_raw;
static atom_t ATOM_tar;
static atom_t ATOM_xar;
static atom_t ATOM_zip;
static atom_t ATOM_file;
static atom_t ATOM_link;
static atom_t ATOM_socket;
static atom_t ATOM_character_device;
static atom_t ATOM_block_device;
static atom_t ATOM_directory;
static atom_t ATOM_fifo;
static functor_t FUNCTOR_error2;
static functor_t FUNCTOR_archive_error2;
static functor_t FUNCTOR_filetype1;
static functor_t FUNCTOR_format1;
static functor_t FUNCTOR_mtime1;
static functor_t FUNCTOR_size1;
static functor_t FUNCTOR_link_target1;
/*******************************
* SYMBOL WRAPPER *
*******************************/
static void
acquire_archive(atom_t symbol)
{ archive_wrapper *ar = PL_blob_data(symbol, NULL, NULL);
ar->symbol = symbol;
}
static int
release_archive(atom_t symbol)
{ archive_wrapper *ar = PL_blob_data(symbol, NULL, NULL);
struct archive *a;
assert(ar->status != AR_OPENED_ENTRY);
if ( (a=ar->archive) )
{ ar->archive = NULL;
archive_read_free(a);
}
free_archive(ar);
PL_free(ar);
return TRUE;
}
static int
compare_archives(atom_t a, atom_t b)
{ archive_wrapper *ara = PL_blob_data(a, NULL, NULL);
archive_wrapper *arb = PL_blob_data(b, NULL, NULL);
return ( ara > arb ? 1 :
ara < arb ? -1 : 0
);
}
static int
write_archive(IOSTREAM *s, atom_t symbol, int flags)
{ archive_wrapper *ar = PL_blob_data(symbol, NULL, NULL);
Sfprintf(s, "<archive>(%p)", ar);
return TRUE;
}
static PL_blob_t archive_blob =
{ PL_BLOB_MAGIC,
PL_BLOB_NOCOPY,
"archive",
release_archive,
compare_archives,
write_archive,
acquire_archive
};
static int
get_archive(term_t t, archive_wrapper **arp)
{ PL_blob_t *type;
void *data;
if ( PL_get_blob(t, &data, NULL, &type) && type == &archive_blob)
{ archive_wrapper *ar = data;
assert(ar->magic == ARCHIVE_MAGIC);
if ( ar->symbol )
{ *arp = ar;
return TRUE;
}
PL_permission_error("access", "closed_archive", t);
return FALSE;
}
return PL_type_error("archive", t);
}
/*******************************
* CALLBACKS *
*******************************/
static int
ar_open(struct archive *a, void *cdata)
{ return ARCHIVE_OK;
}
static int
ar_close(struct archive *a, void *cdata)
{ archive_wrapper *ar = cdata;
PL_release_stream(ar->data);
if ( ar->close_parent )
{ if ( Sclose(ar->data) != 0 )
{ archive_set_error(ar->archive, errno, "Close failed");
ar->data = NULL;
return ARCHIVE_FATAL;
}
ar->data = NULL;
}
return ARCHIVE_OK; /* TBD: close_parent */
}
static ssize_t
ar_read(struct archive *a, void *cdata, const void **buffer)
{ archive_wrapper *ar = cdata;
if ( Sfeof(ar->data) )
{ return 0;
} else
{ ssize_t bytes = ar->data->limitp - ar->data->bufp;
*buffer = ar->data->bufp;
ar->data->bufp = ar->data->limitp;
ar->data->position->byteno += bytes;
return bytes;
}
}
#ifndef __LA_INT64_T
#define __LA_INT64_T off_t
#endif
static __LA_INT64_T
ar_skip(struct archive *a, void *cdata, __LA_INT64_T request)
{ archive_wrapper *ar = cdata;
if ( Sseek64(ar->data, request, SIO_SEEK_CUR) == 0 )
return request;
Sclearerr(ar->data);
return 0; /* cannot skip; library will read */
}
#ifdef HAVE_ARCHIVE_READ_OPEN1
static __LA_INT64_T
ar_seek(struct archive *a, void *cdata, __LA_INT64_T request, int whence)
{ archive_wrapper *ar = cdata;
int s_whence;
switch (whence) {
case SEEK_SET: s_whence=SIO_SEEK_SET; break;
case SEEK_CUR: s_whence=SIO_SEEK_CUR; break;
case SEEK_END: s_whence=SIO_SEEK_END; break;
default: assert(0); return -1;
}
if ( Sseek64(ar->data, request, s_whence) == 0 ) {
return Stell64(ar->data);
}
Sclearerr(ar->data); /* JW: why is this? */
return ARCHIVE_FATAL;
}
#endif
/*******************************
* PROLOG *
*******************************/
static void
free_archive(archive_wrapper *ar)
{
}
static int
archive_error(archive_wrapper *ar)
{ int eno = archive_errno(ar->archive);
if ( eno != 0 )
{ const char *s = archive_error_string(ar->archive);
term_t ex = PL_new_term_ref();
if ( PL_unify_term(ex,
PL_FUNCTOR, FUNCTOR_error2,
PL_FUNCTOR, FUNCTOR_archive_error2,
PL_INT, errno,
PL_CHARS, s,
PL_VARIABLE) )
return PL_raise_exception(ex);
return FALSE;
}
return TRUE;
}
#define FILTER_ALL 0x0000ffff
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_BZIP2
#define FILTER_BZIP2 0x00000001
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_COMPRESS
#define FILTER_COMPRESS 0x00000002
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_GZIP
#define FILTER_GZIP 0x00000004
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_GRZIP
#define FILTER_GRZIP 0x00000008
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_LRZIP
#define FILTER_LRZIP 0x00000010
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_LZIP
#define FILTER_LZIP 0x00000020
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_LZMA
#define FILTER_LZMA 0x00000040
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_LZOP
#define FILTER_LZOP 0x00000080
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_NONE
#define FILTER_NONE 0x00000100
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_RPM
#define FILTER_RPM 0x00000200
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_UU
#define FILTER_UU 0x00000400
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FILTER_XZ
#define FILTER_XZ 0x00000800
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_7ZIP
#define FORMAT_7ZIP 0x00010000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_AR
#define FORMAT_AR 0x00020000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_CAB
#define FORMAT_CAB 0x00040000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_CPIO
#define FORMAT_CPIO 0x00080000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_EMPTY
#define FORMAT_EMPTY 0x00100000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_GNUTAR
#define FORMAT_GNUTAR 0x00200000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_ISO9660
#define FORMAT_ISO9960 0x00400000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_LHA
#define FORMAT_LHA 0x00800000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_MTREE
#define FORMAT_MTREE 0x01000000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_RAR
#define FORMAT_RAR 0x02000000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_RAW
#define FORMAT_RAW 0x04000000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_TAR
#define FORMAT_TAR 0x08000000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_XAR
#define FORMAT_XAR 0x10000000
#endif
#ifdef HAVE_ARCHIVE_READ_SUPPORT_FORMAT_ZIP
#define FORMAT_ZIP 0x20000000
#endif
#define FORMAT_MASK 0xffff0000
#define FORMAT_ALL (FORMAT_MASK&~FORMAT_RAW)
static void
enable_type(archive_wrapper *ar, int type,
int (*f)(struct archive *ar))
{ if ( (ar->type & type) )
{ if ( (*f)(ar->archive) != ARCHIVE_OK )
ar->type &= ~type;
}
}
static foreign_t
archive_open_stream(term_t data, term_t handle, term_t options)
{ IOSTREAM *datas;
archive_wrapper *ar;
term_t tail = PL_copy_term_ref(options);
term_t head = PL_new_term_ref();
term_t arg = PL_new_term_ref();
if ( !PL_get_stream_handle(data, &datas) )
return FALSE;
if ( !(datas->flags & SIO_INPUT) )
{ PL_release_stream(datas);
return PL_domain_error("input_stream", data);
}
ar = PL_malloc(sizeof(*ar));
memset(ar, 0, sizeof(*ar));
ar->data = datas;
ar->magic = ARCHIVE_MAGIC;
if ( !PL_unify_blob(handle, ar, sizeof(*ar), &archive_blob) )
return FALSE;
while( PL_get_list_ex(tail, head, tail) )
{ atom_t name;
int arity;
if ( !PL_get_name_arity(head, &name, &arity) ||
!PL_get_arg(1, head, arg) )
return PL_type_error("option", head);
if ( name == ATOM_compression || name == ATOM_filter )
{ atom_t c;
if ( !PL_get_atom_ex(arg, &c) )
return FALSE;
if ( c == ATOM_all )
ar->type |= FILTER_ALL;
#ifdef FILTER_BZIP2
else if ( c == ATOM_bzip2 )
ar->type |= FILTER_BZIP2;
#endif
#ifdef FILTER_COMPRESS
else if ( c == ATOM_compress )
ar->type |= FILTER_COMPRESS;
#endif
#ifdef FILTER_GZIP
else if ( c == ATOM_gzip )
ar->type |= FILTER_GZIP;
#endif
#ifdef FILTER_GRZIP
else if ( c == ATOM_grzip )
ar->type |= FILTER_GRZIP;
#endif
#ifdef FILTER_LRZIP
else if ( c == ATOM_lrzip )
ar->type |= FILTER_LRZIP;
#endif
#ifdef FILTER_LZIP
else if ( c == ATOM_lzip )
ar->type |= FILTER_LZIP;
#endif
#ifdef FILTER_LZMA
else if ( c == ATOM_lzma )
ar->type |= FILTER_LZMA;
#endif
#ifdef FILTER_LZOP
else if ( c == ATOM_lzop )
ar->type |= FILTER_LZOP;
#endif
#ifdef FILTER_NONE
else if ( c == ATOM_none )
ar->type |= FILTER_NONE;
#endif
#ifdef FILTER_RPM
else if ( c == ATOM_rpm )
ar->type |= FILTER_RPM;
#endif
#ifdef FILTER_UU
else if ( c == ATOM_uu )
ar->type |= FILTER_UU;
#endif
#ifdef FILTER_XZ
else if ( c == ATOM_xz )
ar->type |= FILTER_XZ;
#endif
else
return PL_domain_error("filter", arg);
} else if ( name == ATOM_format )
{ atom_t f;
if ( !PL_get_atom_ex(arg, &f) )
return FALSE;
if ( f == ATOM_all )
ar->type |= FORMAT_ALL;
#ifdef FORMAT_7ZIP
else if ( f == ATOM_7zip )
ar->type |= FORMAT_7ZIP;
#endif
#ifdef FORMAT_AR
else if ( f == ATOM_ar )
ar->type |= FORMAT_AR;
#endif
#ifdef FORMAT_CAB
else if ( f == ATOM_cab )
ar->type |= FORMAT_CAB;
#endif
#ifdef FORMAT_CPIO
else if ( f == ATOM_cpio )
ar->type |= FORMAT_CPIO;
#endif
#ifdef FORMAT_EMPTY
else if ( f == ATOM_empty )
ar->type |= FORMAT_EMPTY;
#endif
#ifdef FORMAT_GNUTAR
else if ( f == ATOM_gnutar )
ar->type |= FORMAT_GNUTAR;
#endif
#ifdef FORMAT_ISO9960
else if ( f == ATOM_iso9960 )
ar->type |= FORMAT_ISO9960;
#endif
#ifdef FORMAT_LHA
else if ( f == ATOM_lha )
ar->type |= FORMAT_LHA;
#endif
#ifdef FORMAT_MTREE
else if ( f == ATOM_mtree )
ar->type |= FORMAT_MTREE;
#endif
#ifdef FORMAT_RAR
else if ( f == ATOM_rar )
ar->type |= FORMAT_RAR;
#endif
#ifdef FORMAT_RAW
else if ( f == ATOM_raw )
ar->type |= FORMAT_RAW;
#endif
#ifdef FORMAT_TAR
else if ( f == ATOM_tar )
ar->type |= FORMAT_TAR;
#endif
#ifdef FORMAT_XAR
else if ( f == ATOM_xar )
ar->type |= FORMAT_XAR;
#endif
#ifdef FORMAT_ZIP
else if ( f == ATOM_zip )
ar->type |= FORMAT_ZIP;
#endif
else
return PL_domain_error("format", arg);
} else if ( name == ATOM_close_parent )
{ if ( !PL_get_bool_ex(arg, &ar->close_parent) )
return FALSE;
}
}
if ( !PL_get_nil_ex(tail) )
return FALSE;
if ( !(ar->type & FILTER_ALL) )
ar->type |= FILTER_ALL;
if ( !(ar->type & FORMAT_MASK) )
ar->type |= FORMAT_ALL;
if ( !(ar->archive = archive_read_new()) )
return PL_resource_error("memory");
if ( (ar->type & FILTER_ALL) == FILTER_ALL )
{ archive_read_support_filter_all(ar->archive);
} else
{
#ifdef FILTER_BZIP2
enable_type(ar, FILTER_BZIP2, archive_read_support_filter_bzip2);
#endif
#ifdef FILTER_COMPRESS
enable_type(ar, FILTER_COMPRESS, archive_read_support_filter_compress);
#endif
#ifdef FILTER_GZIP
enable_type(ar, FILTER_GZIP, archive_read_support_filter_gzip);
#endif
#ifdef FILTER_GRZIP
enable_type(ar, FILTER_GRZIP, archive_read_support_filter_grzip);
#endif
#ifdef FILTER_LRZIP
enable_type(ar, FILTER_LRZIP, archive_read_support_filter_lrzip);
#endif
#ifdef FILTER_LZIP
enable_type(ar, FILTER_LZIP, archive_read_support_filter_lzip);
#endif
#ifdef FILTER_LZMA
enable_type(ar, FILTER_LZMA, archive_read_support_filter_lzma);
#endif
#ifdef FILTER_LZOP
enable_type(ar, FILTER_LZOP, archive_read_support_filter_lzop);
#endif
#ifdef FILTER_NONE
enable_type(ar, FILTER_NONE, archive_read_support_filter_none);
#endif
#ifdef FILTER_RPM
enable_type(ar, FILTER_RPM, archive_read_support_filter_rpm);
#endif
#ifdef FILTER_UU
enable_type(ar, FILTER_UU, archive_read_support_filter_uu);
#endif
#ifdef FILTER_XZ
enable_type(ar, FILTER_XZ, archive_read_support_filter_xz);
#endif
}
if ( (ar->type & FORMAT_ALL) == FORMAT_ALL )
{ archive_read_support_format_all(ar->archive);
#ifdef FORMAT_RAW
enable_type(ar, FORMAT_RAW, archive_read_support_format_raw);
#endif
} else
{
#ifdef FORMAT_7ZIP
enable_type(ar, FORMAT_7ZIP, archive_read_support_format_7zip);
#endif
#ifdef FORMAT_AR
enable_type(ar, FORMAT_AR, archive_read_support_format_ar);
#endif
#ifdef FORMAT_CAB
enable_type(ar, FORMAT_CAB, archive_read_support_format_cab);
#endif
#ifdef FORMAT_CPIO
enable_type(ar, FORMAT_CPIO, archive_read_support_format_cpio);
#endif
#ifdef FORMAT_EMPTY
enable_type(ar, FORMAT_EMPTY, archive_read_support_format_empty);
#endif
#ifdef FORMAT_GNUTAR
enable_type(ar, FORMAT_GNUTAR, archive_read_support_format_gnutar);
#endif
#ifdef FORMAT_ISO9960
enable_type(ar, FORMAT_ISO9960, archive_read_support_format_iso9660);
#endif
#ifdef FORMAT_LHA
enable_type(ar, FORMAT_LHA, archive_read_support_format_lha);
#endif
#ifdef FORMAT_MTREE
enable_type(ar, FORMAT_MTREE, archive_read_support_format_mtree);
#endif
#ifdef FORMAT_RAR
enable_type(ar, FORMAT_RAR, archive_read_support_format_rar);
#endif
#ifdef FORMAT_RAW
enable_type(ar, FORMAT_RAW, archive_read_support_format_raw);
#endif
#ifdef FORMAT_TAR
enable_type(ar, FORMAT_TAR, archive_read_support_format_tar);
#endif
#ifdef FORMAT_XAR
enable_type(ar, FORMAT_XAR, archive_read_support_format_xar);
#endif
#ifdef FORMAT_ZIP
enable_type(ar, FORMAT_ZIP, archive_read_support_format_zip);
#endif
}
#ifdef HAVE_ARCHIVE_READ_OPEN1
archive_read_set_callback_data(ar->archive, ar);
archive_read_set_open_callback(ar->archive, ar_open);
archive_read_set_read_callback(ar->archive, ar_read);
archive_read_set_skip_callback(ar->archive, ar_skip);
archive_read_set_seek_callback(ar->archive, ar_seek);
archive_read_set_close_callback(ar->archive, ar_close);
if ( archive_read_open1(ar->archive) == ARCHIVE_OK )
{ ar->status = AR_OPENED;
return TRUE;
}
#else
if ( archive_read_open2(ar->archive, ar,
ar_open, ar_read, ar_skip, ar_close) == ARCHIVE_OK )
{ ar->status = AR_OPENED;
return TRUE;
}
#endif
return archive_error(ar);
}
static foreign_t
archive_property(term_t archive, term_t prop, term_t value)
{ archive_wrapper *ar;
atom_t pn;
const char *s;
if ( !get_archive(archive, &ar) ||
!PL_get_atom_ex(prop, &pn) )
return FALSE;
#ifdef HAVE_ARCHIVE_FILTER_COUNT
if ( pn == ATOM_filter )
{ int i, fcount = archive_filter_count(ar->archive);
term_t tail = PL_copy_term_ref(value);
term_t head = PL_new_term_ref();
for(i=0; i<fcount; i++)
{ s = archive_filter_name(ar->archive, i);
if ( !s || strcmp(s, "none") == 0 )
continue;
if ( !PL_unify_list(tail, head, tail) ||
!PL_unify_atom_chars(head, s) )
return FALSE;
}
return PL_unify_nil(tail);
}
#endif
return FALSE;
}
static foreign_t
archive_next_header(term_t archive, term_t name)
{ archive_wrapper *ar;
int rc;
if ( !get_archive(archive, &ar) )
return FALSE;
if ( ar->status == AR_NEW_ENTRY )
archive_read_data_skip(ar->archive);
if ( ar->status == AR_OPENED_ENTRY )
return PL_permission_error("next_header", "archive", archive);
while ( (rc=archive_read_next_header(ar->archive, &ar->entry)) == ARCHIVE_OK )
{ if ( PL_unify_wchars(name, PL_ATOM, -1,
archive_entry_pathname_w(ar->entry)) )
{ ar->status = AR_NEW_ENTRY;
return TRUE;
}
if ( PL_exception(0) )
return FALSE;
}
if ( rc == ARCHIVE_EOF )
return FALSE; /* simply at the end */
return archive_error(ar);
}
static foreign_t
archive_close(term_t archive)
{ archive_wrapper *ar;
int rc;
if ( !get_archive(archive, &ar) )
return FALSE;
if ( ar->status == AR_OPENED_ENTRY )
{ ar->closed_archive = TRUE;
return TRUE;
} else if ( (rc=archive_read_free(ar->archive)) == ARCHIVE_OK )
{ ar->entry = NULL;
ar->archive = NULL;
ar->symbol = 0;
return TRUE;
}
return archive_error(ar);
}
/*******************************
* HEADERS *
*******************************/
static foreign_t
archive_header_prop(term_t archive, term_t field)
{ archive_wrapper *ar;
functor_t prop;
if ( !get_archive(archive, &ar) )
return FALSE;
if ( !PL_get_functor(field, &prop) )
return PL_type_error("compound", field);
if ( ar->status != AR_NEW_ENTRY )
return PL_permission_error("access", "archive_entry", archive);
if ( prop == FUNCTOR_filetype1 )
{ __LA_MODE_T type = archive_entry_filetype(ar->entry);
atom_t name;
term_t arg = PL_new_term_ref();
_PL_get_arg(1, field, arg);
switch(type&AE_IFMT)
{ case AE_IFREG: name = ATOM_file; break;
case AE_IFLNK: name = ATOM_link; break;
case AE_IFSOCK: name = ATOM_socket; break;
case AE_IFCHR: name = ATOM_character_device; break;
case AE_IFBLK: name = ATOM_block_device; break;
case AE_IFDIR: name = ATOM_directory; break;
case AE_IFIFO: name = ATOM_fifo; break;
default:
return PL_unify_integer(arg, (type&AE_IFMT));
}
return PL_unify_atom(arg, name);
} else if ( prop == FUNCTOR_mtime1 )
{ time_t stamp = archive_entry_mtime(ar->entry);
term_t arg = PL_new_term_ref();
_PL_get_arg(1, field, arg);
return PL_unify_float(arg, (double)stamp);
} else if ( prop == FUNCTOR_size1 )
{ int64_t size = archive_entry_size(ar->entry);
term_t arg = PL_new_term_ref();
_PL_get_arg(1, field, arg);
return PL_unify_int64(arg, size);
} else if ( prop == FUNCTOR_link_target1 )
{ __LA_MODE_T type = archive_entry_filetype(ar->entry);
const wchar_t *target = NULL;
switch(type&AE_IFMT)
{ case AE_IFLNK:
target = archive_entry_symlink_w(ar->entry);
break;
}
if ( target )
{ term_t arg = PL_new_term_ref();
_PL_get_arg(1, field, arg);
return PL_unify_wchars(arg, PL_ATOM, (size_t)-1, target);
}
return FALSE;
} else if ( prop == FUNCTOR_format1 )
{ const char *s = archive_format_name(ar->archive);
if ( s )
{ char lwr[50];
char *o;
term_t arg = PL_new_term_ref();
_PL_get_arg(1, field, arg);
for(o=lwr; *s && o < lwr+sizeof(lwr); )
*o++ = tolower(*s++);
*o = '\0';
return PL_unify_atom_chars(arg, lwr);
}
}
return PL_domain_error("archive_header_property", field);
}
/*******************************
* READ MEMBERS *
*******************************/
static ssize_t
ar_read_entry(void *handle, char *buf, size_t size)
{ archive_wrapper *ar = handle;
return archive_read_data(ar->archive, buf, size);
}
static int
ar_close_entry(void *handle)
{ archive_wrapper *ar = handle;
if ( ar->closed_archive )
{ struct archive *a = ar->archive;
ar->archive = NULL;
ar->entry = NULL;
ar->archive = NULL;
ar->symbol = 0;
archive_read_free(a);
}
if ( ar->status == AR_OPENED_ENTRY )
{ PL_unregister_atom(ar->symbol);
ar->status = AR_CLOSED_ENTRY;
}
return 0;
}
static int
ar_control_entry(void *handle, int op, void *data)
{ archive_wrapper *ar = handle;
(void)ar;
switch(op)
{ case SIO_SETENCODING:
return 0; /* allow switching encoding */
case SIO_GETSIZE:
*((int64_t*)data) = archive_entry_size(ar->entry);
return 0;
default:
return -1;
}
}
static IOFUNCTIONS ar_entry_functions =
{ ar_read_entry,
NULL,
NULL, /* seek */
ar_close_entry,
ar_control_entry, /* control */
NULL, /* seek64 */
};
static foreign_t
archive_open_entry(term_t archive, term_t stream)
{ archive_wrapper *ar;
IOSTREAM *s;
if ( !get_archive(archive, &ar) )
return FALSE;
if ( (s=Snew(ar, SIO_INPUT|SIO_RECORDPOS, &ar_entry_functions)) )
{ ar->status = AR_OPENED_ENTRY;
if ( PL_unify_stream(stream, s) )
{ PL_register_atom(ar->symbol); /* We may no longer reference the */
return TRUE; /* archive itself */
}
Sclose(s);
return FALSE;
}
return PL_resource_error("memory");
}