From 109f1913d4824c8214d5bbd38ebebf62c37572da Mon Sep 17 00:00:00 2001
From: Lasse Collin <lasse.collin@tukaani.org>
Date: Tue, 13 Feb 2024 17:00:17 +0200
Subject: [PATCH] Scripts: Add lz4 support to xzgrep and xzdiff.

---
 src/scripts/xzdiff.1  |  8 +++++---
 src/scripts/xzdiff.in | 14 +++++++++-----
 src/scripts/xzgrep.1  |  6 ++++--
 src/scripts/xzgrep.in |  1 +
 4 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/src/scripts/xzdiff.1 b/src/scripts/xzdiff.1
index 5f556072..8f473eda 100644
--- a/src/scripts/xzdiff.1
+++ b/src/scripts/xzdiff.1
@@ -5,7 +5,7 @@
 .\"
 .\" (Note that this file is not based on gzip's zdiff.1.)
 .\"
-.TH XZDIFF 1 "2024-02-12" "Tukaani" "XZ Utils"
+.TH XZDIFF 1 "2024-02-13" "Tukaani" "XZ Utils"
 .SH NAME
 xzcmp, xzdiff, lzcmp, lzdiff \- compare compressed files
 .
@@ -48,8 +48,9 @@ are specified, they can be uncompressed files or files in formats that
 .BR gzip (1),
 .BR bzip2 (1),
 .BR lzop (1),
+.BR zstd (1),
 or
-.BR zstd (1)
+.BR lz4 (1)
 can decompress.
 The required decompression commands are determined from
 the filename suffixes of
@@ -91,4 +92,5 @@ is used.
 .BR gzip (1),
 .BR bzip2 (1),
 .BR lzop (1),
-.BR zstd (1)
+.BR zstd (1),
+.BR lz4 (1)
diff --git a/src/scripts/xzdiff.in b/src/scripts/xzdiff.in
index 40a1fd33..ee5726e8 100644
--- a/src/scripts/xzdiff.in
+++ b/src/scripts/xzdiff.in
@@ -84,13 +84,15 @@ if test $# -eq 1; then
       xz1=lzop;;
     *[-.]zst | *.tzst)
       xz1='zstd -q';;
+    *[-.]lz4)
+      xz1=lz4;;
     *)
       printf '%s\n' "$0: $1: Unknown compressed file name suffix" >&2
       exit 2;;
   esac
   case $1 in
-    *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *[-.]lzo | *[-.]zst)
-      FILE=`expr "X$1" : 'X\(.*\)[-.][abglmostxzZ2]*$'`;;
+    *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *[-.]lzo | *[-.]zst | *[-.]lz4)
+      FILE=`expr "X$1" : 'X\(.*\)[-.][abglmostxzZ24]*$'`;;
     *.t[abglx]z)
       FILE=`expr "X$1" : 'X\(.*[-.]t\)[abglx]z$'`ar;;
     *.tbz2)
@@ -110,17 +112,19 @@ elif test $# -eq 2; then
     *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) xz1=gzip;;
     *[-.]lzo | *.tzo) xz1=lzop;;
     *[-.]zst | *.tzst) xz1='zstd -q';;
+    *[-.]lz4) xz1=lz4;;
   esac
   case $2 in
     *[-.]bz2 | *.tbz | *.tbz2) xz2=bzip2;;
     *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) xz2=gzip;;
     *[-.]lzo | *.tzo) xz2=lzop;;
     *[-.]zst | *.tzst) xz2='zstd -q';;
+    *[-.]lz4) xz2=lz4;;
   esac
   case $1 in
-    *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | *[-.]zst | *.tzst | -)
+    *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | *[-.]zst | *.tzst | *[-.]lz4 | -)
       case "$2" in
-        *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | *[-.]zst | *.tzst | -)
+        *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | *[-.]zst | *.tzst | *[-.]lz4 | -)
           if test "$1$2" = --; then
             xz_status=$(
               exec 4>&1
@@ -184,7 +188,7 @@ elif test $# -eq 2; then
     esac;;
   *)
     case "$2" in
-      *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | *[-.]zst | *.tzst | -)
+      *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | *[-.]zst | *.tzst | *[-.]lz4 | -)
         xz_status=$(
           exec 4>&1
           ($xz2 -cdf -- "$2" 4>&-; echo $? >&4) 3>&- |
diff --git a/src/scripts/xzgrep.1 b/src/scripts/xzgrep.1
index d60a0516..63f012c9 100644
--- a/src/scripts/xzgrep.1
+++ b/src/scripts/xzgrep.1
@@ -5,7 +5,7 @@
 .\"
 .\" (Note that this file is not based on gzip's zgrep.1.)
 .\"
-.TH XZGREP 1 "2024-02-12" "Tukaani" "XZ Utils"
+.TH XZGREP 1 "2024-02-13" "Tukaani" "XZ Utils"
 .SH NAME
 xzgrep \- search possibly-compressed files for patterns
 .
@@ -45,8 +45,9 @@ with a suffix supported by
 .BR gzip (1),
 .BR bzip2 (1),
 .BR lzop (1),
+.BR zstd (1),
 or
-.BR zstd (1)
+.BR lz4 (1)
 will be decompressed;
 all other files are assumed to be uncompressed.
 .PP
@@ -139,4 +140,5 @@ or
 .BR bzip2 (1),
 .BR lzop (1),
 .BR zstd (1),
+.BR lz4 (1),
 .BR zgrep (1)
diff --git a/src/scripts/xzgrep.in b/src/scripts/xzgrep.in
index 6e3d8d7e..74add3e0 100644
--- a/src/scripts/xzgrep.in
+++ b/src/scripts/xzgrep.in
@@ -181,6 +181,7 @@ for i; do
     *[-.]bz2 | *[-.]tbz | *.tbz2) uncompress="bzip2 -cdf";;
     *[-.]lzo | *[-.]tzo) uncompress="lzop -cdf";;
     *[-.]zst | *[-.]tzst) uncompress="zstd -cdfq";; # zstd needs -q.
+    *[-.]lz4) uncompress="lz4 -cdf";;
     *) uncompress="$xz -cdfqQ";; # -qQ to ignore warnings like unsupp. check.
   esac
   # xz_status will hold the decompressor's exit status.