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-rw-r--r--archival/libunarchive/decompress_unlzma.c164
-rw-r--r--archival/libunarchive/rangecoder.h147
-rw-r--r--include/libbb.h1
3 files changed, 145 insertions, 167 deletions
diff --git a/archival/libunarchive/decompress_unlzma.c b/archival/libunarchive/decompress_unlzma.c
index fa7b37c37..10883581c 100644
--- a/archival/libunarchive/decompress_unlzma.c
+++ b/archival/libunarchive/decompress_unlzma.c
@@ -1,3 +1,4 @@
+/* vi:set ts=4: */
/*
* Small lzma deflate implementation.
* Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
@@ -5,31 +6,154 @@
* Based on LzmaDecode.c from the LZMA SDK 4.22 (http://www.7-zip.org/)
* Copyright (C) 1999-2005 Igor Pavlov
*
- * This program 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 program 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 St, Fifth Floor, Boston, MA 02110-1301 USA
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include <stdint.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <byteswap.h>
-
#include "libbb.h"
-
#include "unarchive.h"
-#include "rangecoder.h"
+#ifdef CONFIG_FEATURE_LZMA_FAST
+# define speed_inline ATTRIBUTE_ALWAYS_INLINE
+#else
+# define speed_inline
+#endif
+
+
+typedef struct {
+ int fd;
+ uint8_t *ptr;
+ uint8_t *buffer;
+ uint8_t *buffer_end;
+ int buffer_size;
+ uint32_t code;
+ uint32_t range;
+ uint32_t bound;
+} rc_t;
+
+
+#define RC_TOP_BITS 24
+#define RC_MOVE_BITS 5
+#define RC_MODEL_TOTAL_BITS 11
+
+
+/* Called twice: once at startup and once in rc_normalize() */
+static void rc_read(rc_t * rc)
+{
+ rc->buffer_size = read(rc->fd, rc->buffer, rc->buffer_size);
+ if (rc->buffer_size <= 0)
+ bb_error_msg_and_die("unexpected EOF");
+ rc->ptr = rc->buffer;
+ rc->buffer_end = rc->buffer + rc->buffer_size;
+}
+
+/* Called once */
+static void rc_init(rc_t * rc, int fd, int buffer_size)
+{
+ int i;
+
+ rc->fd = fd;
+ rc->buffer = xmalloc(buffer_size);
+ rc->buffer_size = buffer_size;
+ rc->buffer_end = rc->buffer + rc->buffer_size;
+ rc->ptr = rc->buffer_end;
+
+ rc->code = 0;
+ rc->range = 0xFFFFFFFF;
+ for (i = 0; i < 5; i++) {
+ if (rc->ptr >= rc->buffer_end)
+ rc_read(rc);
+ rc->code = (rc->code << 8) | *rc->ptr++;
+ }
+}
+
+/* Called once. TODO: bb_maybe_free() */
+static ATTRIBUTE_ALWAYS_INLINE void rc_free(rc_t * rc)
+{
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(rc->buffer);
+}
+
+/* Called twice, but one callsite is in speed_inline'd rc_is_bit_0_helper() */
+static void rc_do_normalize(rc_t * rc)
+{
+ if (rc->ptr >= rc->buffer_end)
+ rc_read(rc);
+ rc->range <<= 8;
+ rc->code = (rc->code << 8) | *rc->ptr++;
+}
+static ATTRIBUTE_ALWAYS_INLINE void rc_normalize(rc_t * rc)
+{
+ if (rc->range < (1 << RC_TOP_BITS)) {
+ rc_do_normalize(rc);
+ }
+}
+
+/* Called 9 times */
+/* Why rc_is_bit_0_helper exists?
+ * Because we want to always expose (rc->code < rc->bound) to optimizer
+ */
+static speed_inline uint32_t rc_is_bit_0_helper(rc_t * rc, uint16_t * p)
+{
+ rc_normalize(rc);
+ rc->bound = *p * (rc->range >> RC_MODEL_TOTAL_BITS);
+ return rc->bound;
+}
+static ATTRIBUTE_ALWAYS_INLINE int rc_is_bit_0(rc_t * rc, uint16_t * p)
+{
+ uint32_t t = rc_is_bit_0_helper(rc, p);
+ return rc->code < t;
+}
+
+/* Called ~10 times, but very small, thus inlined */
+static speed_inline void rc_update_bit_0(rc_t * rc, uint16_t * p)
+{
+ rc->range = rc->bound;
+ *p += ((1 << RC_MODEL_TOTAL_BITS) - *p) >> RC_MOVE_BITS;
+}
+static speed_inline void rc_update_bit_1(rc_t * rc, uint16_t * p)
+{
+ rc->range -= rc->bound;
+ rc->code -= rc->bound;
+ *p -= *p >> RC_MOVE_BITS;
+}
+
+/* Called 4 times in unlzma loop */
+static int rc_get_bit(rc_t * rc, uint16_t * p, int *symbol)
+{
+ if (rc_is_bit_0(rc, p)) {
+ rc_update_bit_0(rc, p);
+ *symbol *= 2;
+ return 0;
+ } else {
+ rc_update_bit_1(rc, p);
+ *symbol = *symbol * 2 + 1;
+ return 1;
+ }
+}
+
+/* Called once */
+static ATTRIBUTE_ALWAYS_INLINE int rc_direct_bit(rc_t * rc)
+{
+ rc_normalize(rc);
+ rc->range >>= 1;
+ if (rc->code >= rc->range) {
+ rc->code -= rc->range;
+ return 1;
+ }
+ return 0;
+}
+
+/* Called twice */
+static speed_inline void
+rc_bit_tree_decode(rc_t * rc, uint16_t * p, int num_levels, int *symbol)
+{
+ int i = num_levels;
+
+ *symbol = 1;
+ while (i--)
+ rc_get_bit(rc, p + *symbol, symbol);
+ *symbol -= 1 << num_levels;
+}
typedef struct {
diff --git a/archival/libunarchive/rangecoder.h b/archival/libunarchive/rangecoder.h
deleted file mode 100644
index b806eebf6..000000000
--- a/archival/libunarchive/rangecoder.h
+++ /dev/null
@@ -1,147 +0,0 @@
-
-#include "libbb.h"
-
-#ifdef CONFIG_FEATURE_LZMA_FAST
-# define speed_inline ATTRIBUTE_ALWAYS_INLINE
-#else
-# define speed_inline
-#endif
-
-
-typedef struct {
- int fd;
- uint8_t *ptr;
- uint8_t *buffer;
- uint8_t *buffer_end;
- int buffer_size;
- uint32_t code;
- uint32_t range;
- uint32_t bound;
-} rc_t;
-
-
-#define RC_TOP_BITS 24
-#define RC_MOVE_BITS 5
-#define RC_MODEL_TOTAL_BITS 11
-
-
-/* Called twice: once at startup and once in rc_normalize() */
-static void rc_read(rc_t * rc)
-{
- rc->buffer_size = read(rc->fd, rc->buffer, rc->buffer_size);
- if (rc->buffer_size <= 0)
- bb_error_msg_and_die("unexpected EOF");
- rc->ptr = rc->buffer;
- rc->buffer_end = rc->buffer + rc->buffer_size;
-}
-
-/* Called once */
-static void rc_init(rc_t * rc, int fd, int buffer_size)
-{
- int i;
-
- rc->fd = fd;
- rc->buffer = xmalloc(buffer_size);
- rc->buffer_size = buffer_size;
- rc->buffer_end = rc->buffer + rc->buffer_size;
- rc->ptr = rc->buffer_end;
-
- rc->code = 0;
- rc->range = 0xFFFFFFFF;
- for (i = 0; i < 5; i++) {
- if (rc->ptr >= rc->buffer_end)
- rc_read(rc);
- rc->code = (rc->code << 8) | *rc->ptr++;
- }
-}
-
-/* Called once. TODO: bb_maybe_free() */
-static ATTRIBUTE_ALWAYS_INLINE void rc_free(rc_t * rc)
-{
- if (ENABLE_FEATURE_CLEAN_UP)
- free(rc->buffer);
-}
-
-/* Called twice, but one callsite is in speed_inline'd rc_is_bit_0_helper() */
-static void rc_do_normalize(rc_t * rc)
-{
- if (rc->ptr >= rc->buffer_end)
- rc_read(rc);
- rc->range <<= 8;
- rc->code = (rc->code << 8) | *rc->ptr++;
-}
-static ATTRIBUTE_ALWAYS_INLINE void rc_normalize(rc_t * rc)
-{
- if (rc->range < (1 << RC_TOP_BITS)) {
- rc_do_normalize(rc);
- }
-}
-
-/* Called 9 times */
-/* Why rc_is_bit_0_helper exists?
- * Because we want to always expose (rc->code < rc->bound) to optimizer
- */
-static speed_inline uint32_t rc_is_bit_0_helper(rc_t * rc, uint16_t * p)
-{
- rc_normalize(rc);
- rc->bound = *p * (rc->range >> RC_MODEL_TOTAL_BITS);
- return rc->bound;
-}
-static ATTRIBUTE_ALWAYS_INLINE int rc_is_bit_0(rc_t * rc, uint16_t * p)
-{
- uint32_t t = rc_is_bit_0_helper(rc, p);
- return rc->code < t;
-}
-
-/* Called ~10 times, but very small, thus inlined */
-static speed_inline void rc_update_bit_0(rc_t * rc, uint16_t * p)
-{
- rc->range = rc->bound;
- *p += ((1 << RC_MODEL_TOTAL_BITS) - *p) >> RC_MOVE_BITS;
-}
-static speed_inline void rc_update_bit_1(rc_t * rc, uint16_t * p)
-{
- rc->range -= rc->bound;
- rc->code -= rc->bound;
- *p -= *p >> RC_MOVE_BITS;
-}
-
-/* Called 4 times in unlzma loop */
-static int rc_get_bit(rc_t * rc, uint16_t * p, int *symbol)
-{
- if (rc_is_bit_0(rc, p)) {
- rc_update_bit_0(rc, p);
- *symbol *= 2;
- return 0;
- } else {
- rc_update_bit_1(rc, p);
- *symbol = *symbol * 2 + 1;
- return 1;
- }
-}
-
-/* Called once */
-static ATTRIBUTE_ALWAYS_INLINE int rc_direct_bit(rc_t * rc)
-{
- rc_normalize(rc);
- rc->range >>= 1;
- if (rc->code >= rc->range) {
- rc->code -= rc->range;
- return 1;
- }
- return 0;
-}
-
-/* Called twice */
-static speed_inline void
-rc_bit_tree_decode(rc_t * rc, uint16_t * p, int num_levels, int *symbol)
-{
- int i = num_levels;
-
- *symbol = 1;
- while (i--)
- rc_get_bit(rc, p + *symbol, symbol);
- *symbol -= 1 << num_levels;
-}
-
-/* vi:set ts=4: */
diff --git a/include/libbb.h b/include/libbb.h
index bc886dab9..998bcc6f3 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -24,6 +24,7 @@
#include <sys/time.h>
#include <sys/types.h>
#include <termios.h>
+#include <unistd.h>
#ifdef CONFIG_SELINUX
#include <selinux/selinux.h>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 09:31:44 +0000