libunarchive, and recovery from my previous commit

include/libbb.h

@@ -212,39 +212,6 @@ char *last_char_is(const char *s, int c);
 
 extern long arith (const char *startbuf, int *errcode);
 
-typedef struct file_headers_s {
-	char *name;
-	char *link_name;
-	off_t size;
-	uid_t uid;
-	gid_t gid;
-	mode_t mode;
-	time_t mtime;
-	dev_t device;
-} file_header_t;
-file_header_t *get_header_ar(FILE *in_file);
-file_header_t *get_header_cpio(FILE *src_stream);
-file_header_t *get_header_tar(FILE *tar_stream);
-
-enum extract_functions_e {
-	extract_verbose_list = 1,
-	extract_list = 2,
-	extract_one_to_buffer = 4,
-	extract_to_stdout = 8,
-	extract_all_to_fs = 16,
-	extract_preserve_date = 32,
-	extract_data_tar_gz = 64,
-	extract_control_tar_gz = 128,
-	extract_unzip_only = 256,
-	extract_unconditional = 512,
-	extract_create_leading_dirs = 1024,
-	extract_quiet = 2048,
-	extract_exclude_list = 4096
-};
-char *unarchive(FILE *src_stream, FILE *out_stream, file_header_t *(*get_headers)(FILE *),
-	const int extract_function, const char *prefix, char **include_name, char **exclude_name);
-char *deb_extract(const char *package_filename, FILE *out_stream, const int extract_function,
-	const char *prefix, const char *filename);
 int read_package_field(const char *package_buffer, char **field_name, char **field_value);
 char *fgets_str(FILE *file, const char *terminating_string);
 
@@ -318,49 +285,5 @@ extern const char * const can_not_create_raw_socket;
 /* The following devices are the same on devfs and non-devfs systems.  */
 #define CURRENT_TTY "/dev/tty"
 #define CONSOLE_DEV "/dev/console"
-typedef struct deb_file_s {
-	char *filename;
-	char *control_file;
-	unsigned short node:14;
-} deb_file_t;
-
-typedef struct node_s {
-	/* This are always used by dpkg */
-	unsigned short name:14;
-	unsigned short epoch:4;
-	unsigned short version:12;
-	unsigned short revision:8;
-	unsigned short essential:1;
-	unsigned short state_want:3;
-	unsigned short state_flag:2;
-	unsigned short state_status:3;
-	unsigned short pool_flag:2;
-	unsigned short source:11;
-	unsigned short filename:11;
-	unsigned short num_of_edges:7;
-	unsigned short *edge;
-#ifdef BB_FEATURE_DPKG_LIST_SHORT_DESCRIPTIONS
-	char *description_short;	/* This is used by dpkg -l */
-#endif
-} node_t;
-
-/* All these are in deb_functs.c */
-extern void deb_initialise_hashtables(short type);
-extern void write_status_file(deb_file_t **deb_file);
-extern void configure_package(deb_file_t *deb_file);
-extern void unpack_package(deb_file_t *deb_file);
-extern void remove_package(const unsigned int node_num);
-extern void index_status_file(const char *filename);
-extern void find_deps(const char *package_name);
-extern void purge_package(const unsigned int node_num);
-extern node_t *parse_package_metadata(char *control_buffer);
-extern unsigned short search_node_ht(node_t *search_node, unsigned short operator);
-extern void add_node(node_t *node, unsigned short node_num);
-extern node_t *initialise_node(const char *package_name);
-extern char *get_name_ht(unsigned short name_num);
-extern void free_hashtables(void);
-extern node_t *get_node_ht(unsigned short node_num);
-extern char *version_revision(unsigned short version_num, unsigned short revision_num);
-extern void free_node(node_t *node);
 
 #endif /* __LIBCONFIG_H__ */

include/unarchive.h

@@ -0,0 +1,42 @@
+#include <stdio.h>	// for off_t
+
+enum extract_functions_e {
+	extract_verbose_list = 1,
+	extract_list = 2,
+	extract_one_to_buffer = 4,
+	extract_to_stdout = 8,
+	extract_all_to_fs = 16,
+	extract_preserve_date = 32,
+	extract_data_tar_gz = 64,
+	extract_control_tar_gz = 128,
+	extract_unzip_only = 256,
+	extract_unconditional = 512,
+	extract_create_leading_dirs = 1024,
+	extract_quiet = 2048,
+	extract_exclude_list = 4096
+};
+
+typedef struct file_headers_s {
+	char *name;
+	char *link_name;
+	off_t size;
+	uid_t uid;
+	gid_t gid;
+	mode_t mode;
+	time_t mtime;
+	dev_t device;
+} file_header_t;
+
+file_header_t *get_header_ar(FILE *in_file);
+file_header_t *get_header_cpio(FILE *src_stream);
+file_header_t *get_header_tar(FILE *tar_stream);
+
+void seek_sub_file(FILE *src_stream, const int count);
+
+extern off_t archive_offset;
+
+char *unarchive(FILE *src_stream, FILE *out_stream, file_header_t *(*get_headers)(FILE *),
+	const int extract_function, const char *prefix, char **include_name, char **exclude_name);
+
+char *deb_extract(const char *package_filename, FILE *out_stream, const int extract_function,
+	const char *prefix, const char *filename);