Move all handling of compressor names to libcompress.a

This commit removes handling of compressor names from gensquashfs. Instead,
functions are added to libcompress to obtain name from ID, ID from name
and to print out defaults.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 7 insertions, 29 deletions

diff --git a/mkfs/options.c b/mkfs/options.c
index a746ba4..e298a6c 100644
--- a/mkfs/options.c
+++ b/mkfs/options.c
@@ -61,7 +61,6 @@ static const char *help_string =
 "\n"
 "  --compressor, -c <name>     Select the compressor to use.\n"
 "                              A list of available compressors is below.\n"
-"                              Defaults to '%s'.\n"
 "  --comp-extra, -X <options>  A comma seperated list of extra options for\n"
 "                              the selected compressor. Specify 'help' to\n"
 "                              get a list of available options.\n"
@@ -126,15 +125,6 @@ static const char *help_string =
 "    file /bin/bash 0755 0 0"
 "\n\n";
 
-static const char *compressors[] = {
-	[SQFS_COMP_GZIP] = "gzip",
-	[SQFS_COMP_LZMA] = "lzma",
-	[SQFS_COMP_LZO] = "lzo",
-	[SQFS_COMP_XZ] = "xz",
-	[SQFS_COMP_LZ4] = "lz4",
-	[SQFS_COMP_ZSTD] = "zstd",
-};
-
 static long read_number(const char *name, const char *str, long min, long max)
 {
 	long result = strtol(str, NULL, 0);
@@ -217,17 +207,13 @@ void process_command_line(options_t *opt, int argc, char **argv)
 
 		switch (i) {
 		case 'c':
-			have_compressor = false;
+			have_compressor = true;
 
-			for (i = SQFS_COMP_MIN; i <= SQFS_COMP_MAX; ++i) {
-				if (strcmp(compressors[i], optarg) == 0) {
-					if (compressor_exists(i)) {
-						have_compressor = true;
-						opt->compressor = i;
-						break;
-					}
-				}
-			}
+			if (compressor_id_from_name(optarg, &opt->compressor))
+				have_compressor = false;
+
+			if (!compressor_exists(opt->compressor))
+				have_compressor = false;
 
 			if (!have_compressor) {
 				fprintf(stderr, "Unsupported compressor '%s'\n",
@@ -268,16 +254,8 @@ void process_command_line(options_t *opt, int argc, char **argv)
 #endif
 		case 'h':
 			printf(help_string, __progname,
-			       compressors[compressor_get_default()],
 			       SQFS_DEFAULT_BLOCK_SIZE, SQFS_DEVBLK_SIZE);
-
-			fputs("Available compressors:\n", stdout);
-
-			for (i = SQFS_COMP_MIN; i <= SQFS_COMP_MAX; ++i) {
-				if (compressor_exists(i))
-					printf("\t%s\n", compressors[i]);
-			}
-
+			compressor_print_available();
 			exit(EXIT_SUCCESS);
 		case 'V':
 			print_version();