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-rw-r--r--lib/comp/compressor.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/comp/compressor.c b/lib/comp/compressor.c
index 6dff416..506df46 100644
--- a/lib/comp/compressor.c
+++ b/lib/comp/compressor.c
@@ -47,6 +47,15 @@ static const compressor_help_fun_t helpfuns[SQFS_COMP_MAX + 1] = {
#endif
};
+static const char *names[] = {
+ [SQFS_COMP_GZIP] = "gzip",
+ [SQFS_COMP_LZMA] = "lzma",
+ [SQFS_COMP_LZO] = "lzo",
+ [SQFS_COMP_XZ] = "xz",
+ [SQFS_COMP_LZ4] = "lz4",
+ [SQFS_COMP_ZSTD] = "zstd",
+};
+
int generic_write_options(int fd, const void *data, size_t size)
{
uint8_t buffer[size + 2];
@@ -129,6 +138,42 @@ void compressor_print_help(E_SQFS_COMPRESSOR id)
helpfuns[id]();
}
+void compressor_print_available(void)
+{
+ size_t i;
+
+ fputs("Available compressors:\n", stdout);
+
+ for (i = 0; i < sizeof(names) / sizeof(names[0]); ++i) {
+ if (compressor_exists(i))
+ printf("\t%s\n", names[i]);
+ }
+
+ printf("\nDefault compressor: %s\n", names[compressor_get_default()]);
+}
+
+const char *compressor_name_from_id(E_SQFS_COMPRESSOR id)
+{
+ if (id < 0 || (size_t)id > sizeof(names) / sizeof(names[0]))
+ return NULL;
+
+ return names[id];
+}
+
+int compressor_id_from_name(const char *name, E_SQFS_COMPRESSOR *out)
+{
+ size_t i;
+
+ for (i = 0; i < sizeof(names) / sizeof(names[0]); ++i) {
+ if (names[i] != NULL && strcmp(names[i], name) == 0) {
+ *out = i;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
E_SQFS_COMPRESSOR compressor_get_default(void)
{
#if defined(WITH_XZ)