Another checkpoint for installing binary packages.

At least now dependencies are tracked, not sure it will be
enough for real life :-)

--HG--
extra : convert_revision : 962de22d515efa5599c148f918c14d32b5d9496d

lib/util.c

@@ -0,0 +1,96 @@
+/*-
+ * Copyright (c) 2008 Juan Romero Pardines.
+ * 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.
+ */
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <limits.h>
+
+#include <xbps_api.h>
+
+const char *
+xbps_get_pkg_version(const char *pkg)
+{
+	const char *tmp;
+
+	/* Get the required version */
+	tmp = strrchr(pkg, '-');
+	assert(tmp != NULL);
+	return tmp + 1; /* skip first '-' */
+}
+
+char *
+xbps_get_pkg_name(const char *pkg)
+{
+	const char *tmp;
+	char *pkgname;
+	size_t len = 0;
+
+	/* Get the required version */
+	tmp = strrchr(pkg, '-');
+	assert(tmp != NULL);
+	len = strlen(pkg) - strlen(tmp) + 1;
+
+	/* Get package name */
+	pkgname = malloc(len);
+	memcpy(pkgname, pkg, len - 1);
+	pkgname[len - 1] = '\0';
+
+	return pkgname;
+}
+
+bool
+xbps_append_full_path(char *buf, const char *root, const char *plistf)
+{
+	const char *env, *tmp;
+	size_t len = 0;
+
+	assert(buf != NULL);
+	assert(plistf != NULL);
+
+	if (root)
+		env = root;
+	else {
+		env = getenv("XBPS_META_PATH");
+		if (env == NULL)
+			env = XBPS_META_PATH;
+	}
+
+	tmp = strncpy(buf, env, PATH_MAX - 1);
+	if (sizeof(*tmp) >= PATH_MAX) {
+		errno = ENOSPC;
+		return false;
+	}
+
+	len = strlen(buf);
+	buf[len + 1] = '\0';
+	if (buf[len - 2] != '/')
+		strncat(buf, "/", 1);
+	strncat(buf, plistf, sizeof(buf) - strlen(buf) - 1);
+
+	return true;
+}