xz: Add --experimental-arm64[=width=WIDTH].

It will be renamed to --arm64 once it is stable.

Man page or --long-help weren't updated yet.

src/xz/args.c

@@ -126,6 +126,7 @@ parse_real(args_info *args, int argc, char **argv)
 		OPT_IA64,
 		OPT_ARM,
 		OPT_ARMTHUMB,
+		OPT_ARM64,
 		OPT_SPARC,
 		OPT_DELTA,
 		OPT_LZMA1,
@@ -197,6 +198,7 @@ parse_real(args_info *args, int argc, char **argv)
 		{ "ia64",         optional_argument, NULL,  OPT_IA64 },
 		{ "arm",          optional_argument, NULL,  OPT_ARM },
 		{ "armthumb",     optional_argument, NULL,  OPT_ARMTHUMB },
+		{ "experimental-arm64",        optional_argument, NULL,  OPT_ARM64 },
 		{ "sparc",        optional_argument, NULL,  OPT_SPARC },
 		{ "delta",        optional_argument, NULL,  OPT_DELTA },
 
@@ -370,6 +372,11 @@ parse_real(args_info *args, int argc, char **argv)
 					options_bcj(optarg));
 			break;
 
+		case OPT_ARM64:
+			coder_add_filter(LZMA_FILTER_ARM64,
+					options_arm64(optarg));
+			break;
+
 		case OPT_SPARC:
 			coder_add_filter(LZMA_FILTER_SPARC,
 					options_bcj(optarg));

src/xz/message.c

@@ -1036,6 +1036,13 @@ message_filters_to_str(char buf[FILTERS_STR_SIZE],
 			break;
 		}
 
+		case LZMA_FILTER_ARM64: {
+			const lzma_options_arm64 *opt = filters[i].options;
+			my_snprintf(&pos, &left, "arm64=width=%" PRIu32,
+					opt->width);
+			break;
+		}
+
 		case LZMA_FILTER_DELTA: {
 			const lzma_options_delta *opt = filters[i].options;
 			my_snprintf(&pos, &left, "delta=dist=%" PRIu32,

src/xz/options.c

@@ -224,6 +224,45 @@ options_bcj(const char *str)
 }
 
 
+///////////
+// ARM64 //
+///////////
+
+enum {
+	OPT_WIDTH,
+};
+
+
+static void
+set_arm64(void *options, unsigned key, uint64_t value,
+		const char *valuestr lzma_attribute((__unused__)))
+{
+	lzma_options_arm64 *opt = options;
+	switch (key) {
+	case OPT_WIDTH:
+		opt->width = value;
+		break;
+	}
+}
+
+
+extern lzma_options_arm64 *
+options_arm64(const char *str)
+{
+	static const option_map opts[] = {
+		{ "width", NULL, LZMA_ARM64_WIDTH_MIN, LZMA_ARM64_WIDTH_MAX },
+		{ NULL,    NULL, 0, 0 }
+	};
+
+	lzma_options_arm64 *options = xmalloc(sizeof(lzma_options_arm64));
+	options->width = LZMA_ARM64_WIDTH_DEFAULT;
+
+	parse_options(str, opts, &set_arm64, options);
+
+	return options;
+}
+
+
 //////////
 // LZMA //
 //////////

src/xz/options.h

@@ -24,6 +24,13 @@ extern lzma_options_delta *options_delta(const char *str);
 extern lzma_options_bcj *options_bcj(const char *str);
 
 
+/// \brief      Parser for ARM64 options
+///
+/// \return     Pointer to allocated options structure.
+///             Doesn't return on error.
+extern lzma_options_arm64 *options_arm64(const char *str);
+
+
 /// \brief      Parser for LZMA options
 ///
 /// \return     Pointer to allocated options structure.