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