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[cascardo/declara.git] / lib / util.c

diff --git a/lib/util.c b/lib/util.c
new file mode 100644 (file)
index 0000000..90ca426
--- /dev/null
+++ b/lib/util.c
@@ -0,0 +1,58 @@
+/*
+ *  Copyright (C) 2015  Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
+ *
+ *  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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "util.h"
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+
+int set_llong(char *str, long long *val)
+{
+       char *end = NULL;
+       errno = 0;
+       *val = strtoll(str, &end, 0);
+       if (end && *end)
+               return -EINVAL;
+       if (errno == ERANGE)
+               return -ERANGE;
+       return 0;
+}
+
+int set_int(char **args, int argc, int *val)
+{
+       char *end = NULL;
+       if (argc != 2)
+               return -EINVAL;
+       errno = 0;
+       *val = strtol(args[1], &end, 0);
+       if (end && *end)
+               return -EINVAL;
+       if (errno == ERANGE)
+               return -ERANGE;
+       return 0;
+}
+
+int set_string(char **args, int argc, char **str)
+{
+       if (argc != 2)
+               return -EINVAL;
+       *str = strdup(args[1]);
+       if (!*str)
+               return -errno;
+       return 0;
+}