From 8f18b4b4e6de05b86036973e69aeaa1a31f7d271 Mon Sep 17 00:00:00 2001
From: Yann Collet <cyan@fb.com>
Date: Fri, 29 Jul 2022 22:18:02 +0200
Subject: introduced new `--no-crc` command

which disables both frame and block checksums.
---
 programs/lz4.1.md | 3 +++
 programs/lz4cli.c | 1 +
 tests/Makefile    | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/programs/lz4.1.md b/programs/lz4.1.md
index 56c0053..39dc925 100644
--- a/programs/lz4.1.md
+++ b/programs/lz4.1.md
@@ -188,6 +188,9 @@ only the latest one will be applied.
 * `--[no-]frame-crc`:
   Select frame checksum (default:enabled)
 
+* `--no-crc`:
+  Disable both frame and block checksums
+
 * `--[no-]content-size`:
   Header includes original size (default:not present)<br/>
   Note : this option can only be activated when the original size can be
diff --git a/programs/lz4cli.c b/programs/lz4cli.c
index ca4951e..51969fd 100644
--- a/programs/lz4cli.c
+++ b/programs/lz4cli.c
@@ -391,6 +391,7 @@ int main(int argc, const char** argv)
                     || (!strcmp(argument, "--to-stdout"))) { forceStdout=1; output_filename=stdoutmark; continue; }
                 if (!strcmp(argument,  "--frame-crc")) { LZ4IO_setStreamChecksumMode(prefs, 1); BMK_skipChecksums(0); continue; }
                 if (!strcmp(argument,  "--no-frame-crc")) { LZ4IO_setStreamChecksumMode(prefs, 0); BMK_skipChecksums(1); continue; }
+                if (!strcmp(argument,  "--no-crc")) { LZ4IO_setStreamChecksumMode(prefs, 0); LZ4IO_setBlockChecksumMode(prefs, 0); BMK_skipChecksums(1); continue; }
                 if (!strcmp(argument,  "--content-size")) { LZ4IO_setContentSize(prefs, 1); continue; }
                 if (!strcmp(argument,  "--no-content-size")) { LZ4IO_setContentSize(prefs, 0); continue; }
                 if (!strcmp(argument,  "--list")) { mode = om_list; continue; }
diff --git a/tests/Makefile b/tests/Makefile
index d804f25..d266ae5 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -376,6 +376,7 @@ test-lz4-basic: lz4 datagen unlz4 lz4cat
 	$(LZ4) --no-frame-crc < $(FPREFIX)-dg20k | $(LZ4) -d > $(FPREFIX)-dec
 	$(DIFF) -q $(FPREFIX)-dg20k $(FPREFIX)-dec
 	$(DATAGEN)           | $(LZ4) -BI    | $(LZ4) -t
+	$(DATAGEN)           | $(LZ4) --no-crc | $(LZ4) -t
 	$(DATAGEN) -g6M -P99 | $(LZ4) -9BD   | $(LZ4) -t
 	$(DATAGEN) -g17M     | $(LZ4) -9v    | $(LZ4) -qt
 	$(DATAGEN) -g33M     | $(LZ4) --no-frame-crc | $(LZ4) -t
@@ -479,6 +480,7 @@ test-lz4-testmode: lz4 datagen
 	$(DATAGEN) > $(FPREFIX)
 	$(LZ4) -f $(FPREFIX) -c > $(FPREFIX).lz4
 	$(LZ4) -bdi0 $(FPREFIX).lz4 # test benchmark decode-only mode
+	$(LZ4) -bdi0 --no-crc $(FPREFIX).lz4 # test benchmark decode-only mode
 	@echo "\n ---- test mode ----"
 	! $(DATAGEN) | $(LZ4) -t
 	! $(DATAGEN) | $(LZ4) -tf
-- 
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