1 files changed, 65 insertions, 0 deletions
diff --git a/lib/splitstring.c b/lib/splitstring.c
new file mode 100644
index 0000000..6874b33
--- /dev/null
+++ b/lib/splitstring.c
@@ -0,0 +1,65 @@
+/* splitstring.c -- split a const string into fields.
+   Copyright (C) 2011 Free Software Foundation, Inc.
+
+   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, see <http://www.gnu.org/licenses/>.
+*/
+/*
+ * Written by James Youngman.
+ */
+/* config.h must be included first. */
+#include <config.h>
+
+/* system headers. */
+#include <stdbool.h>
+#include <string.h>
+
+/* gnulib headers would go here. */
+
+/* find headers. */
+#include "splitstring.h"
+
+static size_t
+field_length (const char *str, const char *separators)
+{
+  /* if there are no separators, the whole input is one field. */
+  if (*separators)
+    {
+      const char *end = strpbrk (str, separators);
+      if (end)
+	return end - str;
+    }
+  return strlen (str);
+}
+
+
+bool
+splitstring(const char *s, const char *separators, bool first,
+	    size_t *pos, size_t *len)
+{
+  if (first)
+    {
+      *pos = 0u;
+      *len = 0u;
+    }
+  else
+    {
+      *pos += *len;		/* advance to the next field. */
+      if (s[*pos])
+	++*pos;			/* skip the separator */
+      else
+	return false;		/* we reached the end. */
+    }
+  *len = field_length (&s[*pos], separators);
+  return true;
+}