WIP: Move cregistry snapshot functions

move all methods dealing with snapshot from entry.c to snapshot.c,
to better modularize

src/cregistry/entry.h

@@ -42,25 +42,6 @@ typedef struct {
     char* proc; /* name of Tcl proc, if using Tcl */
 } reg_entry;
 
-typedef struct {
-    char* variant_name;
-    char* variant_sign;
-} variant;
-
-typedef struct {
-    char* name;
-    int requested;
-    char* state;
-    variant* variants;
-} port;
-
-typedef struct {
-    char* id;
-    char* note;
-    port* ports;
-    char* proc; /* name of Tcl proc, if using Tcl */
-} reg_snapshot;
-
 reg_entry* reg_entry_create(reg_registry* reg, char* name, char* version,
         char* revision, char* variants, char* epoch, reg_error* errPtr);
 
@@ -113,22 +94,6 @@ int reg_entry_dependencies(reg_entry* entry, reg_entry*** dependencies,
         reg_error* errPtr);
 int reg_entry_depends(reg_entry* entry, char* name, reg_error* errPtr);
 
-reg_entry* reg_snapshot_create(reg_registry* reg, char* note,
-        reg_error* errPtr);
-int snapshot_store_ports(reg_registry* reg, reg_entry* entry,
-        reg_error* errPtr);
-int snapshot_store_port_variants(reg_registry* reg, reg_entry* port_entry,
-        int snapshot_ports_id, reg_error* errPtr);
-
-int get_parsed_variants(char* variants_str, variant* all_variants,
-    char* delim, int* variant_count);
-
-char* reg_snapshot_get_id(reg_registry* reg, reg_error* errPtr);
-int reg_snapshot_port_variants_get(reg_registry* reg,
-        sqlite_int64 snapshot_port_id, variant** variants, reg_error* errPtr);
-int reg_snapshot_get(reg_registry* reg, char* id,
-        reg_snapshot* snapshot, reg_error* errPtr);
-
 int reg_all_open_entries(reg_registry* reg, reg_entry*** entries);
 
 #endif /* _CENTRY_H */

src/cregistry/snapshot.h

@@ -0,0 +1,75 @@
+/*
+ * snapshot.h
+ * vim:tw=80:expandtab
+ *
+ * Copyright (c) 2017 The MacPorts Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef _CSNAPSHOT_H
+#define _CSNAPSHOT_H
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "registry.h"
+
+#include <sqlite3.h>
+
+typedef struct {
+    char* variant_name;
+    char* variant_sign;
+} variant;
+
+typedef struct {
+    char* name;g
+    int requested;
+    char* state;
+    variant* variants;
+} port;
+
+typedef struct {
+    char* id;
+    char* note;
+    port* ports;
+    reg_registry* reg; /* associated registry */
+    char* proc; /* name of Tcl proc, if using Tcl */
+} reg_snapshot;
+
+int get_parsed_variants(char* variants_str, variant* all_variants,
+    char* delim, int* variant_count);
+
+reg_entry* reg_snapshot_create(reg_registry* reg, char* note,
+        reg_error* errPtr);
+char* reg_snapshot_get_id(reg_registry* reg, reg_error* errPtr);
+int reg_snapshot_get(reg_registry* reg, char* id,
+        reg_snapshot* snapshot, reg_error* errPtr);
+int reg_snapshot_port_variants_get(reg_registry* reg,
+        sqlite_int64 snapshot_port_id, variant** variants, reg_error* errPtr);
+
+int snapshot_store_ports(reg_registry* reg, reg_entry* entry,
+        reg_error* errPtr);
+int snapshot_store_port_variants(reg_registry* reg, reg_entry* port_entry,
+        int snapshot_ports_id, reg_error* errPtr);
+
+#endif /* _CSNAPSHOT_H */