[new uImage] Move gunzip() common code to common/gunzip.c

Move gunzip(), zalloc() and zfree() to a separate file.
Share zalloc() and zfree() with cramfs uncompress routine.

Signed-off-by: Marian Balakowicz <m8@semihalf.com>

3 files changed, 117 insertions, 91 deletions

diff --git a/common/Makefile b/common/Makefile
index d3a4a85..fa5c619 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -37,6 +37,7 @@ COBJS-$(CONFIG_CMD_BDI) += cmd_bdinfo.o
 COBJS-$(CONFIG_CMD_BEDBUG) += cmd_bedbug.o
 COBJS-$(CONFIG_CMD_BMP) += cmd_bmp.o
 COBJS-y += image.o
+COBJS-y += gunzip.o
 COBJS-y += cmd_boot.o
 COBJS-y += cmd_bootm.o
 COBJS-$(CONFIG_CMD_CACHE) += cmd_cache.o
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index 5f1b6b6..67f555e 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -70,8 +70,9 @@ extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
 
 int  gunzip (void *, int, unsigned char *, unsigned long *);
 
-static void *zalloc(void *, unsigned, unsigned);
-static void zfree(void *, void *, unsigned);
+#ifdef CONFIG_BZIP2
+extern void bz_internal_error(int);
+#endif
 
 #if defined(CONFIG_CMD_IMI)
 static int image_info (unsigned long addr);
@@ -864,95 +865,6 @@ print_type (image_header_t *hdr)
 	printf ("%s %s %s (%s)", arch, os, type, comp);
 }
 
-#define	ZALLOC_ALIGNMENT	16
-
-static void *zalloc(void *x, unsigned items, unsigned size)
-{
-	void *p;
-
-	size *= items;
-	size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
-
-	p = malloc (size);
-
-	return (p);
-}
-
-static void zfree(void *x, void *addr, unsigned nb)
-{
-	free (addr);
-}
-
-#define HEAD_CRC	2
-#define EXTRA_FIELD	4
-#define ORIG_NAME	8
-#define COMMENT		0x10
-#define RESERVED	0xe0
-
-#define DEFLATED	8
-
-int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp)
-{
-	z_stream s;
-	int r, i, flags;
-
-	/* skip header */
-	i = 10;
-	flags = src[3];
-	if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
-		puts ("Error: Bad gzipped data\n");
-		return (-1);
-	}
-	if ((flags & EXTRA_FIELD) != 0)
-		i = 12 + src[10] + (src[11] << 8);
-	if ((flags & ORIG_NAME) != 0)
-		while (src[i++] != 0)
-			;
-	if ((flags & COMMENT) != 0)
-		while (src[i++] != 0)
-			;
-	if ((flags & HEAD_CRC) != 0)
-		i += 2;
-	if (i >= *lenp) {
-		puts ("Error: gunzip out of data in header\n");
-		return (-1);
-	}
-
-	s.zalloc = zalloc;
-	s.zfree = zfree;
-#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
-	s.outcb = (cb_func)WATCHDOG_RESET;
-#else
-	s.outcb = Z_NULL;
-#endif	/* CONFIG_HW_WATCHDOG */
-
-	r = inflateInit2(&s, -MAX_WBITS);
-	if (r != Z_OK) {
-		printf ("Error: inflateInit2() returned %d\n", r);
-		return (-1);
-	}
-	s.next_in = src + i;
-	s.avail_in = *lenp - i;
-	s.next_out = dst;
-	s.avail_out = dstlen;
-	r = inflate(&s, Z_FINISH);
-	if (r != Z_OK && r != Z_STREAM_END) {
-		printf ("Error: inflate() returned %d\n", r);
-		return (-1);
-	}
-	*lenp = s.next_out - (unsigned char *) dst;
-	inflateEnd(&s);
-
-	return (0);
-}
-
-#ifdef CONFIG_BZIP2
-void bz_internal_error(int errcode)
-{
-	printf ("BZIP2 internal error %d\n", errcode);
-}
-#endif /* CONFIG_BZIP2 */
-
 static void
 do_bootm_rtems (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		ulong addr, ulong *len_ptr, int verify)
diff --git a/common/gunzip.c b/common/gunzip.c
new file mode 100644
index 0000000..74f0bf9
--- /dev/null
+++ b/common/gunzip.c
@@ -0,0 +1,113 @@
+/*
+ * (C) Copyright 2000-2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <image.h>
+#include <malloc.h>
+#include <zlib.h>
+
+#define	ZALLOC_ALIGNMENT	16
+#define HEAD_CRC		2
+#define EXTRA_FIELD		4
+#define ORIG_NAME		8
+#define COMMENT			0x10
+#define RESERVED		0xe0
+#define DEFLATED		8
+
+int gunzip(void *, int, unsigned char *, unsigned long *);
+void *zalloc(void *, unsigned, unsigned);
+void zfree(void *, void *, unsigned);
+
+void *zalloc(void *x, unsigned items, unsigned size)
+{
+	void *p;
+
+	size *= items;
+	size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
+
+	p = malloc (size);
+
+	return (p);
+}
+
+void zfree(void *x, void *addr, unsigned nb)
+{
+	free (addr);
+}
+
+int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp)
+{
+	z_stream s;
+	int r, i, flags;
+
+	/* skip header */
+	i = 10;
+	flags = src[3];
+	if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
+		puts ("Error: Bad gzipped data\n");
+		return (-1);
+	}
+	if ((flags & EXTRA_FIELD) != 0)
+		i = 12 + src[10] + (src[11] << 8);
+	if ((flags & ORIG_NAME) != 0)
+		while (src[i++] != 0)
+			;
+	if ((flags & COMMENT) != 0)
+		while (src[i++] != 0)
+			;
+	if ((flags & HEAD_CRC) != 0)
+		i += 2;
+	if (i >= *lenp) {
+		puts ("Error: gunzip out of data in header\n");
+		return (-1);
+	}
+
+	s.zalloc = zalloc;
+	s.zfree = zfree;
+#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
+	s.outcb = (cb_func)WATCHDOG_RESET;
+#else
+	s.outcb = Z_NULL;
+#endif	/* CONFIG_HW_WATCHDOG */
+
+	r = inflateInit2(&s, -MAX_WBITS);
+	if (r != Z_OK) {
+		printf ("Error: inflateInit2() returned %d\n", r);
+		return (-1);
+	}
+	s.next_in = src + i;
+	s.avail_in = *lenp - i;
+	s.next_out = dst;
+	s.avail_out = dstlen;
+	r = inflate(&s, Z_FINISH);
+	if (r != Z_OK && r != Z_STREAM_END) {
+		printf ("Error: inflate() returned %d\n", r);
+		return (-1);
+	}
+	*lenp = s.next_out - (unsigned char *) dst;
+	inflateEnd(&s);
+
+	return (0);
+}