Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / lib / gunzip.c

diff --git a/qemu/roms/u-boot/lib/gunzip.c b/qemu/roms/u-boot/lib/gunzip.c
new file mode 100644 (file)
index 0000000..35abfb3
--- /dev/null
+++ b/qemu/roms/u-boot/lib/gunzip.c
@@ -0,0 +1,104 @@
+/*
+ * (C) Copyright 2000-2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <image.h>
+#include <malloc.h>
+#include <u-boot/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
+
+void *gzalloc(void *x, unsigned items, unsigned size)
+{
+       void *p;
+
+       size *= items;
+       size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
+
+       p = malloc (size);
+
+       return (p);
+}
+
+void gzfree(void *x, void *addr, unsigned nb)
+{
+       free (addr);
+}
+
+int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp)
+{
+       int 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);
+       }
+
+       return zunzip(dst, dstlen, src, lenp, 1, i);
+}
+
+/*
+ * Uncompress blocks compressed with zlib without headers
+ */
+int zunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp,
+                                               int stoponerr, int offset)
+{
+       z_stream s;
+       int r;
+
+       s.zalloc = gzalloc;
+       s.zfree = gzfree;
+
+       r = inflateInit2(&s, -MAX_WBITS);
+       if (r != Z_OK) {
+               printf ("Error: inflateInit2() returned %d\n", r);
+               return -1;
+       }
+       s.next_in = src + offset;
+       s.avail_in = *lenp - offset;
+       s.next_out = dst;
+       s.avail_out = dstlen;
+       do {
+               r = inflate(&s, Z_FINISH);
+               if (stoponerr == 1 && r != Z_STREAM_END &&
+                   (s.avail_out == 0 || r != Z_BUF_ERROR)) {
+                       printf("Error: inflate() returned %d\n", r);
+                       inflateEnd(&s);
+                       return -1;
+               }
+               s.avail_in = *lenp - offset - (int)(s.next_out - (unsigned char*)dst);
+       } while (r == Z_BUF_ERROR);
+       *lenp = s.next_out - (unsigned char *) dst;
+       inflateEnd(&s);
+
+       return 0;
+}