archive: replaced setup_stream() with open_stream()

The open_stream() method opens the input_stream.  This allows the
archive plugin to do its own initialization, and it also allows it to
use input_stream.data.  We can remove input_stream.archive now, which
was unnatural to have in the first place.

src/archive/bz2_plugin.c

@@ -148,22 +148,16 @@ bz2_close(struct archive_file *file)
 
 /* single archive handling */
 
-static void
-bz2_setup_stream(struct archive_file *file, struct input_stream *is)
+static bool
+bz2_open_stream(struct archive_file *file, struct input_stream *is,
+		G_GNUC_UNUSED const char *path)
 {
 	bz2_context *context = (bz2_context *) file;
 	//setup file ops
 	is->plugin = &bz2_inputplugin;
 	//insert back reference
-	is->archive = context;
+	is->data = context;
 	is->seekable = false;
-}
-
-
-static bool
-bz2_is_open(struct input_stream *is, G_GNUC_UNUSED const char *url)
-{
-	bz2_context *context = (bz2_context *) is->archive;
 
 	if (!bz2_alloc(context)) {
 		g_warning("alloc bz2 failed\n");
@@ -175,7 +169,7 @@ bz2_is_open(struct input_stream *is, G_GNUC_UNUSED const char *url)
 static void
 bz2_is_close(struct input_stream *is)
 {
-	bz2_context *context = (bz2_context *) is->archive;
+	bz2_context *context = (bz2_context *) is->data;
 	bz2_destroy(context);
 	is->data = NULL;
 }
@@ -211,7 +205,7 @@ bz2_fillbuffer(bz2_context *context,
 static size_t
 bz2_is_read(struct input_stream *is, void *ptr, size_t size)
 {
-	bz2_context *context = (bz2_context *) is->archive;
+	bz2_context *context = (bz2_context *) is->data;
 	bz_stream *bzstream;
 	int bz_result;
 	size_t numBytes = size;
@@ -253,7 +247,7 @@ bz2_is_read(struct input_stream *is, void *ptr, size_t size)
 static bool
 bz2_is_eof(struct input_stream *is)
 {
-	bz2_context *context = (bz2_context *) is->archive;
+	bz2_context *context = (bz2_context *) is->data;
 
 	if (context->last_bz_result == BZ_STREAM_END) {
 		return true;
@@ -283,7 +277,6 @@ static const char *const bz2_extensions[] = {
 };
 
 static const struct input_plugin bz2_inputplugin = {
-	.open = bz2_is_open,
 	.close = bz2_is_close,
 	.read = bz2_is_read,
 	.eof = bz2_is_eof,
@@ -296,7 +289,7 @@ const struct archive_plugin bz2_plugin = {
 	.open = bz2_open,
 	.scan_reset = bz2_scan_reset,
 	.scan_next = bz2_scan_next,
-	.setup_stream = bz2_setup_stream,
+	.open_stream = bz2_open_stream,
 	.close = bz2_close,
 	.suffixes = bz2_extensions
 };

src/archive/iso_plugin.c

@@ -136,23 +136,17 @@ iso_close(struct archive_file *file)
 
 /* single archive handling */
 
-static void
-iso_setup_stream(struct archive_file *file, struct input_stream *is)
+static bool
+iso_open_stream(struct archive_file *file, struct input_stream *is,
+		const char *pathname)
 {
 	iso_context *context = (iso_context *) file;
 	//setup file ops
 	is->plugin = &iso_inputplugin;
 	//insert back reference
-	is->archive = context;
+	is->data = context;
 	//we are not seekable
 	is->seekable = false;
-}
-
-
-static bool
-iso_is_open(struct input_stream *is, const char *pathname)
-{
-	iso_context *context = (iso_context *) is->archive;
 
 	context->statbuf = iso9660_ifs_stat_translate (context->iso, pathname);
 
@@ -168,7 +162,7 @@ iso_is_open(struct input_stream *is, const char *pathname)
 static void
 iso_is_close(struct input_stream *is)
 {
-	iso_context *context = (iso_context *) is->archive;
+	iso_context *context = (iso_context *) is->data;
 	g_free(context->statbuf);
 }
 
@@ -176,7 +170,7 @@ iso_is_close(struct input_stream *is)
 static size_t
 iso_is_read(struct input_stream *is, void *ptr, size_t size)
 {
-	iso_context *context = (iso_context *) is->archive;
+	iso_context *context = (iso_context *) is->data;
 	int toread, readed = 0;
 	int no_blocks, cur_block;
 	size_t left_bytes = context->statbuf->size - context->cur_ofs;
@@ -213,7 +207,7 @@ iso_is_read(struct input_stream *is, void *ptr, size_t size)
 static bool
 iso_is_eof(struct input_stream *is)
 {
-	iso_context *context = (iso_context *) is->archive;
+	iso_context *context = (iso_context *) is->data;
 	return (context->cur_ofs == context->statbuf->size);
 }
 
@@ -238,7 +232,6 @@ static const char *const iso_extensions[] = {
 };
 
 static const struct input_plugin iso_inputplugin = {
-	.open = iso_is_open,
 	.close = iso_is_close,
 	.read = iso_is_read,
 	.eof = iso_is_eof,
@@ -251,7 +244,7 @@ const struct archive_plugin iso_plugin = {
 	.open = iso_open,
 	.scan_reset = iso_scan_reset,
 	.scan_next = iso_scan_next,
-	.setup_stream = iso_setup_stream,
+	.open_stream = iso_open_stream,
 	.close = iso_close,
 	.suffixes = iso_extensions
 };

src/archive/zip_plugin.c

@@ -103,24 +103,19 @@ zip_close(struct archive_file *file)
 
 /* single archive handling */
 
-static void
-zip_setup_stream(struct archive_file *file, struct input_stream *is)
+static bool
+zip_open_stream(struct archive_file *file, struct input_stream *is,
+		const char *pathname)
 {
 	zip_context *context = (zip_context *) file;
+	ZZIP_STAT z_stat;
+
 	//setup file ops
 	is->plugin = &zip_inputplugin;
 	//insert back reference
-	is->archive = context;
+	is->data = context;
 	//we are seekable (but its not recommendent to do so)
 	is->seekable = true;
-}
-
-
-static bool
-zip_is_open(struct input_stream *is, const char *pathname)
-{
-	zip_context *context = (zip_context *) is->archive;
-	ZZIP_STAT z_stat;
 
 	context->file = zzip_file_open(context->dir, pathname, 0);
 	if (!context->file) {
@@ -135,14 +130,14 @@ zip_is_open(struct input_stream *is, const char *pathname)
 static void
 zip_is_close(struct input_stream *is)
 {
-	zip_context *context = (zip_context *) is->archive;
+	zip_context *context = (zip_context *) is->data;
 	zzip_file_close (context->file);
 }
 
 static size_t
 zip_is_read(struct input_stream *is, void *ptr, size_t size)
 {
-	zip_context *context = (zip_context *) is->archive;
+	zip_context *context = (zip_context *) is->data;
 	int ret;
 	ret = zzip_file_read(context->file, ptr, size);
 	if (ret < 0) {
@@ -155,7 +150,7 @@ zip_is_read(struct input_stream *is, void *ptr, size_t size)
 static bool
 zip_is_eof(struct input_stream *is)
 {
-	zip_context *context = (zip_context *) is->archive;
+	zip_context *context = (zip_context *) is->data;
 	return ((size_t) zzip_tell(context->file) == context->length);
 }
 
@@ -163,7 +158,7 @@ static bool
 zip_is_seek(G_GNUC_UNUSED struct input_stream *is,
 	G_GNUC_UNUSED off_t offset, G_GNUC_UNUSED int whence)
 {
-	zip_context *context = (zip_context *) is->archive;
+	zip_context *context = (zip_context *) is->data;
 	zzip_off_t ofs = zzip_seek(context->file, offset, whence);
 	if (ofs != -1) {
 		is->offset = ofs;
@@ -186,7 +181,6 @@ static const char *const zip_extensions[] = {
 };
 
 static const struct input_plugin zip_inputplugin = {
-	.open = zip_is_open,
 	.close = zip_is_close,
 	.read = zip_is_read,
 	.eof = zip_is_eof,
@@ -199,7 +193,7 @@ const struct archive_plugin zip_plugin = {
 	.open = zip_open,
 	.scan_reset = zip_scan_reset,
 	.scan_next = zip_scan_next,
-	.setup_stream = zip_setup_stream,
+	.open_stream = zip_open_stream,
 	.close = zip_close,
 	.suffixes = zip_extensions
 };