Starting to turn relabsd into a proper daemon...

1 files changed, 36 insertions, 0 deletions

diff --git a/src/util/string.c b/src/util/string.c
new file mode 100644
index 0000000..edb5eb6
--- /dev/null
+++ b/src/util/string.c
@@ -0,0 +1,36 @@
+/**** POSIX *******************************************************************/
+#include <stdlib.h>
+
+/******************************************************************************/
+/**** LOCAL FUNCTIONS *********************************************************/
+/******************************************************************************/
+
+/******************************************************************************/
+/**** EXPORTED FUNCTIONS ******************************************************/
+/******************************************************************************/
+int relabsd_util_parse_int
+(
+   const char string [const restrict static 1],
+   const int min,
+   const int max,
+   int output [const restrict static 1]
+)
+{
+   char * invalid_char; /* may become an alias of string. */
+   long int buffer;
+
+   buffer = strtol(string, &invalid_char, 10);
+
+   if ((invalid_char[0] != '\0') || (string[0] == '\0'))
+   {
+      return -1;
+   }
+
+   if ((buffer < ((long int) min)) || (buffer > ((long int) max)))
+   {
+      return -2;
+   }
+
+   *output = ((int) buffer);
+   return 0;
+}