Merge branch 'master_merge_new-image' of /home/tur/git/u-boot

[u-boot] / common / gunzip.c

diff --git a/common/gunzip.c b/common/gunzip.c
new file mode 100644 (file)
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);
+}