Deal with unused function parameters correctly

This started off removing the "(void)foo" hacks to work around
unused function parameters and ended up fixing every warning
generated by -Wunused-parameter.

Dan: rename to UNUSED.

Signed-off-by: Allan McRae <allan@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

lib/libalpm/be_local.c

@@ -180,7 +180,7 @@ static alpm_list_t *_cache_get_replaces(pmpkg_t *pkg)
 }
 
 /* local packages can not have deltas */
-static alpm_list_t *_cache_get_deltas(pmpkg_t *pkg)
+static alpm_list_t *_cache_get_deltas(pmpkg_t UNUSED *pkg)
 {
 	return NULL;
 }
@@ -245,7 +245,7 @@ static void *_cache_changelog_open(pmpkg_t *pkg)
  * @return the number of characters read, or 0 if there is no more data
  */
 static size_t _cache_changelog_read(void *ptr, size_t size,
-		const pmpkg_t *pkg, const void *fp)
+		const pmpkg_t UNUSED *pkg, const void *fp)
 {
 	return fread(ptr, 1, size, (FILE *)fp);
 }
@@ -257,7 +257,7 @@ static size_t _cache_changelog_read(void *ptr, size_t size,
  * @param fp a 'file stream' to the package changelog
  * @return whether closing the package changelog stream was successful
  */
-static int _cache_changelog_close(const pmpkg_t *pkg, void *fp)
+static int _cache_changelog_close(const pmpkg_t UNUSED *pkg, void *fp)
 {
 	return fclose((FILE *)fp);
 }

lib/libalpm/be_package.c

@@ -87,7 +87,7 @@ static void *_package_changelog_open(pmpkg_t *pkg)
  * @return the number of characters read, or 0 if there is no more data
  */
 static size_t _package_changelog_read(void *ptr, size_t size,
-		const pmpkg_t *pkg, const void *fp)
+		const pmpkg_t UNUSED *pkg, const void *fp)
 {
 	ssize_t sret = archive_read_data((struct archive *)fp, ptr, size);
 	/* Report error (negative values) */
@@ -106,7 +106,7 @@ static size_t _package_changelog_read(void *ptr, size_t size,
  * @param fp a 'file stream' to the package changelog
  * @return whether closing the package changelog stream was successful
  */
-static int _package_changelog_close(const pmpkg_t *pkg, void *fp)
+static int _package_changelog_close(const pmpkg_t UNUSED *pkg, void *fp)
 {
 	return archive_read_finish((struct archive *)fp);
 }

lib/libalpm/be_sync.c

@@ -494,7 +494,7 @@ error:
 	return 0;
 }
 
-static int sync_db_version(pmdb_t *db)
+static int sync_db_version(pmdb_t UNUSED *db)
 {
 	return 2;
 }

lib/libalpm/dload.c

@@ -72,22 +72,17 @@ static char *get_fullpath(const char *path, const char *filename,
 enum sighandlers { OLD = 0, NEW = 1 };
 
 static int dload_interrupted;
-static void inthandler(int signum)
+static void inthandler(int UNUSED signum)
 {
-	(void)signum;
 	dload_interrupted = 1;
 }
 
 static int curl_progress(void *file, double dltotal, double dlnow,
-		double ultotal, double ulnow)
+		double UNUSED ultotal, double UNUSED ulnow)
 {
 	struct fileinfo *dlfile = (struct fileinfo *)file;
 	double current_size, total_size;
 
-	/* unused parameters */
-	(void)ultotal;
-	(void)ulnow;
-
 	/* SIGINT sent, abort by alerting curl */
 	if(dload_interrupted) {
 		return 1;

lib/libalpm/package.c

@@ -111,9 +111,22 @@ static alpm_list_t *_pkg_get_deltas(pmpkg_t *pkg)     { return pkg->deltas; }
 static alpm_list_t *_pkg_get_files(pmpkg_t *pkg)      { return pkg->files; }
 static alpm_list_t *_pkg_get_backup(pmpkg_t *pkg)     { return pkg->backup; }
 
-static void *_pkg_changelog_open(pmpkg_t *pkg)        { return NULL; }
-static size_t _pkg_changelog_read(void *ptr, size_t size, const pmpkg_t *pkg, const void *fp) { return 0; }
-static int _pkg_changelog_close(const pmpkg_t *pkg, void *fp) { return EOF; }
+static void *_pkg_changelog_open(pmpkg_t UNUSED *pkg)
+{
+	return NULL;
+}
+
+static size_t _pkg_changelog_read(void UNUSED *ptr, size_t UNUSEDsize,
+		const pmpkg_t UNUSED *pkg, const UNUSED void *fp)
+{
+	return 0;
+}
+
+static int _pkg_changelog_close(const pmpkg_t UNUSED *pkg,
+		void UNUSED *fp)
+{
+	return EOF;
+}
 
 /** The standard package operations struct. Get fields directly from the
  * struct itself with no abstraction layer or any type of lazy loading.

lib/libalpm/trans.c

@@ -365,7 +365,7 @@ static int grep(const char *fn, const char *needle)
 
 int _alpm_runscriptlet(const char *root, const char *installfn,
 		const char *script, const char *ver,
-											 const char *oldver, pmtrans_t *trans)
+		const char *oldver, pmtrans_t UNUSED *trans)
 {
 	char scriptfn[PATH_MAX];
 	char cmdline[PATH_MAX];

lib/libalpm/util.h

@@ -117,6 +117,8 @@ char *strndup(const char *s, size_t n);
 #define SYMEXPORT __attribute__((visibility("default")))
 #define SYMHIDDEN __attribute__((visibility("internal")))
 
+#define UNUSED __attribute__((unused))
+
 #endif /* _ALPM_UTIL_H */
 
 /* vim: set ts=2 sw=2 noet: */