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-rw-r--r--src/liblzma/common/index.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/liblzma/common/index.c b/src/liblzma/common/index.c
index 1fe65650..d7025fff 100644
--- a/src/liblzma/common/index.c
+++ b/src/liblzma/common/index.c
@@ -114,6 +114,17 @@ struct lzma_index_s {
};
+extern LZMA_API lzma_vli
+lzma_index_memusage(lzma_vli count)
+{
+ if (count > LZMA_VLI_MAX)
+ return UINT64_MAX;
+
+ return sizeof(lzma_index) + (count + INDEX_GROUP_SIZE - 1)
+ / INDEX_GROUP_SIZE * sizeof(lzma_index_group);
+}
+
+
static void
free_index_list(lzma_index *i, lzma_allocator *allocator)
{