db: compressed index file

src/apk_archive.h

@@ -21,7 +21,6 @@ typedef int (*apk_archive_entry_parser)(void *ctx,
 					struct apk_istream *istream);
 
 int apk_file_get_info(const char *filename, struct apk_file_info *fi);
-struct apk_istream *apk_gunzip_bstream(struct apk_bstream *);
 
 int apk_parse_tar(struct apk_istream *, apk_archive_entry_parser parser, void *ctx);
 int apk_parse_tar_gz(struct apk_bstream *, apk_archive_entry_parser parser, void *ctx);

src/apk_io.h

@@ -38,6 +38,8 @@ struct apk_bstream {
 	void (*close)(void *stream, csum_p csum);
 };
 
+struct apk_istream *apk_gunzip_bstream(struct apk_bstream *);
+
 struct apk_istream *apk_istream_from_fd(int fd);
 struct apk_istream *apk_istream_from_file(const char *file);
 size_t apk_istream_skip(struct apk_istream *istream, size_t size);
@@ -46,6 +48,8 @@ size_t apk_istream_splice(void *stream, int fd, size_t size);
 struct apk_bstream *apk_bstream_from_istream(struct apk_istream *istream);
 struct apk_bstream *apk_bstream_from_fd(int fd);
 
+struct apk_istream *apk_istream_from_file_gz(const char *file);
+
 apk_blob_t apk_blob_from_istream(struct apk_istream *istream, size_t size);
 apk_blob_t apk_blob_from_file(const char *file);
 

src/database.c

@@ -670,8 +670,8 @@ int apk_db_add_repository(apk_database_t _db, apk_blob_t repository)
 		.url = apk_blob_cstr(repository)
 	};
 
-	snprintf(tmp, sizeof(tmp), "%s/APK_INDEX", db->repos[r].url);
-	is = apk_istream_from_file(tmp);
+	snprintf(tmp, sizeof(tmp), "%s/APK_INDEX.gz", db->repos[r].url);
+	is = apk_istream_from_file_gz(tmp);
 	if (is == NULL) {
 		apk_error("Failed to open index file %s", tmp);
 		return -1;

src/io.c

@@ -362,3 +362,15 @@ int apk_file_get_info(const char *filename, struct apk_file_info *fi)
 
 	return 0;
 }
+
+struct apk_istream *apk_istream_from_file_gz(const char *file)
+{
+	int fd;
+
+	fd = open(file, O_RDONLY);
+	if (fd < 0)
+		return NULL;
+
+	return apk_gunzip_bstream(apk_bstream_from_fd(fd));
+}
+