[U-Boot] [PATCH 1/2] Add unlzma command

[Joe Hershberger]

Provide access to the lzma decompressor from the command line.

Signed-off-by: Joe Hershberger <joe.hershberger at ni.com>
---
 common/Makefile     |  3 +++
 common/cmd_unlzma.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 72 insertions(+)
 create mode 100644 common/cmd_unlzma.c

diff --git a/common/Makefile b/common/Makefile
index 3d62775..b8568ba 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -153,6 +153,9 @@ COBJS-$(CONFIG_CMD_TSI148) += cmd_tsi148.o
 COBJS-$(CONFIG_CMD_UBI) += cmd_ubi.o
 COBJS-$(CONFIG_CMD_UBIFS) += cmd_ubifs.o
 COBJS-$(CONFIG_CMD_UNIVERSE) += cmd_universe.o
+ifdef CONFIG_LZMA
+COBJS-$(CONFIG_CMD_UNLZMA) += cmd_unlzma.o
+endif
 COBJS-$(CONFIG_CMD_UNZIP) += cmd_unzip.o
 ifdef CONFIG_CMD_USB
 COBJS-y += cmd_usb.o
diff --git a/common/cmd_unlzma.c b/common/cmd_unlzma.c
new file mode 100644
index 0000000..c724607
--- /dev/null
+++ b/common/cmd_unlzma.c
@@ -0,0 +1,69 @@
+/*
+ * (C) Copyright 2011
+ * Joe Hershberger, National Instruments, joe.hershberger at ni.com
+ *
+ * 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 <command.h>
+#include <lzma/LzmaTypes.h>
+#include <lzma/LzmaDec.h>
+#include <lzma/LzmaTools.h>
+
+int do_unlzma(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	unsigned long src, dst;
+	unsigned long src_len = ~0UL;
+	size_t dst_len = ~0UL;
+	int ret;
+	char buf[32];
+
+	switch (argc) {
+	case 5:
+		dst_len = simple_strtoul(argv[4], NULL, 16);
+		/* fall through */
+	case 4:
+		src = simple_strtoul(argv[1], NULL, 16);
+		src_len = simple_strtoul(argv[2], NULL, 16);
+		dst = simple_strtoul(argv[3], NULL, 16);
+		break;
+	default:
+		return CMD_RET_USAGE;
+	}
+
+	ret = lzmaBuffToBuffDecompress((void *)dst, &dst_len, (void *)src,
+		src_len);
+	if (ret != SZ_OK) {
+		printf("unlzma: uncompress or overwrite error %d\n", ret);
+		return -1;
+	}
+	printf("Uncompressed size: %u\n", dst_len);
+	sprintf(buf, "%lX", (unsigned long) dst_len);
+	setenv("filesize", buf);
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	unlzma,	5,	1,	do_unlzma,
+	"unlzma a memory region",
+	"srcaddr srcsize dstaddr [dstsize]"
+);
+
-- 
1.7.11.5