openwrt/tools/squashfs4/patches/101-xz_wrapper-support-multiple-lzma-configuration-optio.patch
Christian Marangi 30f2d516ba
tools/squashfs4: add new tool for squashfs4 images
squashfs tool is finally reborn and correctly maintained.

Introduce the new version as a replacement for squasfs4kit as it was a
fork and also abandoned.

Add additional patch to add the missing feature present in squashfskit4
but still missing on this new project.

Backport each required patch that fix compilation error on macos.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
2023-02-20 07:34:03 +01:00

168 lines
4.1 KiB
Diff

From f49793cfbd72fdc40ab75dbffef42dca774701d1 Mon Sep 17 00:00:00 2001
From: Christian Marangi <ansuelsmth@gmail.com>
Date: Fri, 14 Oct 2022 15:59:16 +0200
Subject: [PATCH] xz_wrapper: support multiple lzma configuration options
Add option to configure preset, lc, lp and pb lzma parameters.
-Xpreset can be both a level or set to 'extreme' to use the lzma extreme
compression options.
New option added:
-Xpreset
-Xlc
-Xlp
-Xpb
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
squashfs-tools/xz_wrapper.c | 112 +++++++++++++++++++++++++++++++++++-
1 file changed, 109 insertions(+), 3 deletions(-)
--- a/squashfs-tools/xz_wrapper.c
+++ b/squashfs-tools/xz_wrapper.c
@@ -44,7 +44,10 @@ static struct bcj bcj[] = {
static int filter_count = 1;
static int dictionary_size = 0;
static float dictionary_percent = 0;
-
+static int preset = LZMA_PRESET_DEFAULT;
+static int lc = -1;
+static int lp = -1;
+static int pb = -1;
/*
* This function is called by the options parsing code in mksquashfs.c
@@ -53,6 +56,11 @@ static float dictionary_percent = 0;
* Two specific options are supported:
* -Xbcj
* -Xdict-size
+ * -Xpreset
+ * -Xe
+ * -Xlc
+ * -Xlp
+ * -Xpb
*
* This function returns:
* >=0 (number of additional args parsed) on success
@@ -141,6 +149,85 @@ static int xz_options(char *argv[], int
}
return 1;
+ } else if(strcmp(argv[0], "-Xpreset") == 0) {
+ char *b;
+ long val;
+
+ if(argc < 2) {
+ fprintf(stderr, "xz: -Xpreset missing preset-level\n");
+ goto failed;
+ }
+
+ if (strcmp(argv[1], "extreme") == 0) {
+ preset = LZMA_PRESET_EXTREME;
+
+ return 1;
+ }
+
+ val = strtol(argv[1], &b, 10);
+ if ((int) val < 0 || (int) val & ~LZMA_PRESET_LEVEL_MASK) {
+ fprintf(stderr, "xz: -Xpreset can't be "
+ "negative or more than the max preset\n");
+ goto failed;
+ }
+
+ preset = (int) val;
+
+ return 1;
+ } else if(strcmp(argv[0], "-Xlc") == 0) {
+ char *b;
+ long val;
+
+ if(argc < 2) {
+ fprintf(stderr, "xz: -Xlc missing value\n");
+ goto failed;
+ }
+
+ val = strtol(argv[1], &b, 10);
+ if ((int) val < LZMA_LCLP_MIN || (int) val > LZMA_LCLP_MAX) {
+ fprintf(stderr, "xz: -Xlc invalid value\n");
+ goto failed;
+ }
+
+ lc = (int) val;
+
+ return 1;
+ } else if(strcmp(argv[0], "-Xlp") == 0) {
+ char *b;
+ long val;
+
+ if(argc < 2) {
+ fprintf(stderr, "xz: -Xlp missing value\n");
+ goto failed;
+ }
+
+ val = strtol(argv[1], &b, 10);
+ if ((int) val < LZMA_LCLP_MIN || (int) val > LZMA_LCLP_MAX) {
+ fprintf(stderr, "xz: -Xlc invalid value\n");
+ goto failed;
+ }
+
+ lp = (int) val;
+
+ return 1;
+ } else if(strcmp(argv[0], "-Xpb") == 0) {
+ char *b;
+ long val;
+
+ if(argc < 2) {
+ fprintf(stderr, "xz: -Xpb missing value\n");
+ goto failed;
+ }
+
+ val = strtol(argv[1], &b, 10);
+ if ((int) val < LZMA_PB_MIN || (int) val > LZMA_PB_MAX) {
+ fprintf(stderr, "xz: -Xlc invalid value\n");
+ goto failed;
+ }
+
+ pb = (int) val;
+
+ return 1;
}
return -1;
@@ -446,11 +533,20 @@ static int xz_compress(void *strm, void
for(i = 0; i < stream->filters; i++) {
struct filter *filter = &stream->filter[i];
- if(lzma_lzma_preset(&stream->opt, LZMA_PRESET_DEFAULT))
+ if(lzma_lzma_preset(&stream->opt, preset))
goto failed;
stream->opt.dict_size = stream->dictionary_size;
+ if (lc >= 0)
+ stream->opt.lc = lc;
+
+ if (lp >= 0)
+ stream->opt.lp = lp;
+
+ if (pb >= 0)
+ stream->opt.pb = pb;
+
filter->length = 0;
res = lzma_stream_buffer_encode(filter->filter,
LZMA_CHECK_CRC32, NULL, src, size, filter->buffer,
@@ -521,6 +617,12 @@ static void xz_usage(FILE *stream)
fprintf(stream, " header as either 2^n or as 2^n+2^(n+1).\n\t\t");
fprintf(stream, "Example dict-sizes are 75%%, 50%%, 37.5%%, 25%%, or");
fprintf(stream, " 32K, 16K, 8K\n\t\tetc.\n");
+ fprintf(stream, "\t -Xpreset <preset-level or extreme>\n");
+ fprintf(stream, "\t\tUse <preset-value> as the custom preset to use");
+ fprintf(stream, " on compress. Can be a level number or extreme.\n");
+ fprintf(stream, "\t -Xlc <value>\n");
+ fprintf(stream, "\t -Xlp <value>\n");
+ fprintf(stream, "\t -Xpb <value>\n");
}