ipsw: add function ipsw_get_file_size() to get uncompressed file size

2 files changed, 28 insertions, 0 deletions

diff --git a/src/ipsw.c b/src/ipsw.c
index 789af60..84547b3 100644
--- a/src/ipsw.c
+++ b/src/ipsw.c
@@ -56,6 +56,32 @@ ipsw_archive* ipsw_open(const char* ipsw) {
 	return archive;
 }
 
+int ipsw_get_file_size(const char* ipsw, const char* infile, off_t* size) {
+	ipsw_archive* archive = ipsw_open(ipsw);
+	if (archive == NULL || archive->zip == NULL) {
+		error("ERROR: Invalid archive\n");
+		return -1;
+	}
+
+	int zindex = zip_name_locate(archive->zip, infile, 0);
+	if (zindex < 0) {
+		error("ERROR: zip_name_locate: %s\n", infile);
+		return -1;
+	}
+
+	struct zip_stat zstat;
+	zip_stat_init(&zstat);
+	if (zip_stat_index(archive->zip, zindex, 0, &zstat) != 0) {
+		error("ERROR: zip_stat_index: %s\n", infile);
+		return -1;
+	}
+
+	*size = zstat.size;
+
+	ipsw_close(archive);
+	return 0;
+}
+
 int ipsw_extract_to_file(const char* ipsw, const char* infile, const char* outfile) {
 	ipsw_archive* archive = ipsw_open(ipsw);
 	if (archive == NULL || archive->zip == NULL) {
diff --git a/src/ipsw.h b/src/ipsw.h
index c61e73d..50309bc 100644
--- a/src/ipsw.h
+++ b/src/ipsw.h
@@ -37,6 +37,8 @@ typedef struct {
 	unsigned char* data;
 } ipsw_file;
 
+int ipsw_get_file_size(const char* ipsw, const char* infile, off_t* size);
+int ipsw_extract_to_file(const char* ipsw, const char* infile, const char* outfile);
 int ipsw_extract_to_memory(const char* ipsw, const char* infile, char** pbuffer, uint32_t* psize);
 int ipsw_extract_build_manifest(const char* ipsw, plist_t* buildmanifest, int *tss_enabled);
 int ipsw_extract_restore_plist(const char* ipsw, plist_t* restore_plist);