qpkg: move "struct pkg" and its allocation from gobble.c and qpkg.h to pkg.[hc]

- Makefile (OBJS_qpkg): added pkg.o
- gobble.c (gobble_buf): moved "struct pkg" allocation to function new_pkg
  in pkg.c
- qpkg.h: moved "struct pkg" and subordinate structures to pkg.h
- pkg.h, pkg.c (new_pkg, free_pkg): provide package structure definition,
  allocation, and deallocation
- fixup.c, gobble.c, prereq.c, qpkg.c: include "pkg.h"
- gobble.c (finish_pkg): use free_pkg instead of just "free" to avoid
  leaking memory

qpkg/Makefile

@@ -12,7 +12,7 @@
 
 SHELL = /bin/bash
 
-OBJS_qpkg = fixup.o gobble.o id.o prereq.o qpkg.o jrb.o
+OBJS_qpkg = fixup.o gobble.o id.o pkg.o prereq.o qpkg.o jrb.o
 OBJS_rbtest = rbtest.o jrb.o
 OBJS = $(OBJS_qpkg) $(OBJS_rbtest)
 

qpkg/fixup.c

@@ -12,8 +12,10 @@
 
 
 #include <stdio.h>
+
 #include "jrb.h"
 
+#include "pkg.h"
 #include "qpkg.h"
 #include "fixup.h"
 

qpkg/gobble.c

@@ -21,6 +21,7 @@
 
 #include "util.h"
 #include "id.h"
+#include "pkg.h"
 #include "qpkg.h"
 #include "gobble.h"
 
@@ -123,8 +124,7 @@ static void finish_pkg(struct pkg *new, struct jrb *jrb)
 compact:
 	jrb->val = new->more;
 	old->flags |= new->flags;
-	/* @@@ we may leak a little */
-	free(new);
+	free_pkg(new);
 }
 
 
@@ -302,17 +302,8 @@ package:
 		finish_pkg(pkg, jrb);
 
 	WHITESPACE;
-	pkg = alloc_type(struct pkg);
 	jrb = ID(packages);
-	pkg->id = jrb->key;
-	pkg->more = jrb->val;
-	jrb->val = pkg;
-	pkg->version = NULL;
-	pkg->arch = NULL;
-	pkg->conflicts = pkg->depends = NULL;
-	pkg->filename = NULL;
-	pkg->flags = 0;
-	pkg->mark = 0;
+	pkg = new_pkg(jrb);
 	goto eol;
 
 version:

qpkg/pkg.c

@@ -0,0 +1,59 @@
+/*
+ * pkg.c - Package structure and operations
+ *
+ * Written 2010 by Werner Almesberger
+ * Copyright 2010 Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+
+#include <stdlib.h>
+
+#include "util.h"
+#include "jrb.h"
+#include "pkg.h"
+
+
+
+struct pkg *new_pkg(struct jrb *jrb)
+{
+	struct pkg *pkg;
+
+	pkg = alloc_type(struct pkg);
+
+	pkg->id = jrb->key;
+	pkg->more = jrb->val;
+	jrb->val = pkg;
+	pkg->version = NULL;
+	pkg->arch = NULL;
+	pkg->conflicts = pkg->depends = NULL;
+	pkg->filename = NULL;
+	pkg->flags = 0;
+	pkg->mark = 0;
+
+	return pkg;
+}
+
+
+static void free_refs(struct ref *refs)
+{
+	struct ref *next;
+
+	while (refs) {
+		next = refs->next;
+		free(refs);
+		refs = next;
+	}
+}
+
+
+void free_pkg(struct pkg *pkg)
+{
+	free_refs(pkg->conflicts);
+	free_refs(pkg->depends);
+	free(pkg);
+}

qpkg/pkg.h

@@ -0,0 +1,60 @@
+/*
+ * pkg.h - Package structure and operations
+ *
+ * Written 2010 by Werner Almesberger
+ * Copyright 2010 Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef PKG_H
+#define	PKG_H
+
+#include "jrb.h"
+
+#include "id.h"
+
+
+enum flags {
+	/* parse-time flags */
+	QPKG_INSTALLED	= 1 << 0,	/* installed on target */
+
+	/* run-time flags */
+	QPKG_ADDING	= 1 << 10,	/* resolving dependencies */
+};
+
+enum relop {
+	rel_eq,
+	rel_ge,
+	rel_lt,
+};
+
+struct pkg;
+
+struct ref {
+	struct id *pkg;
+	struct id *version;
+	enum relop relop;	/* undefined if version == NULL */
+	struct ref *next;
+};
+
+struct pkg {
+	struct id *id;
+	struct id *version;
+	const char *arch;
+	struct ref *conflicts;
+	struct ref *depends;
+	const char *filename;
+	int flags;		/* see enum flags */
+	struct pkg *more;
+	int mark;
+};
+
+
+struct pkg *new_pkg(struct jrb *jrb);
+void free_pkg(struct pkg *pkg);
+
+#endif /* !PKG_H */

qpkg/prereq.c

@@ -18,6 +18,7 @@
 
 #include "util.h"
 #include "id.h"
+#include "pkg.h"
 #include "qpkg.h"
 #include "prereq.h"
 

qpkg/qpkg.c

@@ -21,6 +21,7 @@
 #include "prereq.h"
 #include "gobble.h"
 #include "fixup.h"
+#include "pkg.h"
 #include "qpkg.h"
 
 

qpkg/qpkg.h

@@ -16,42 +16,6 @@
 #include "id.h"
 
 
-enum flags {
-	/* parse-time flags */
-	QPKG_INSTALLED	= 1 << 0,	/* installed on target */
-
-	/* run-time flags */
-	QPKG_ADDING	= 1 << 10,	/* resolving dependencies */
-};
-
-enum relop {
-	rel_eq,
-	rel_ge,
-	rel_lt,
-};
-
-struct pkg;
-
-struct ref {
-	struct id *pkg;
-	struct id *version;
-	enum relop relop;	/* undefined if version == NULL */
-	struct ref *next;
-};
-
-struct pkg {
-	struct id *id;
-	struct id *version;
-	const char *arch;
-	struct ref *conflicts;
-	struct ref *depends;
-	const char *filename;
-	int flags;		/* see enum flags */
-	struct pkg *more;
-	int mark;
-};
-
-
 struct tree *packages;
 struct tree *versions;