Upversioned the C source tree to '0.0.7-SNAPSHOT', but proposing to start experimental

work towards 0.1.0 in separate source trees.

src/c/utils.c

@@ -0,0 +1,33 @@
+/*
+ * utils.c
+ *
+ * little generally useful functions which aren't in any way special to PSSE.
+ *
+ * (c) 2019 Simon Brooke <simon@journeyman.cc>
+ * Licensed under GPL version 2.0, or, at your option, any later version.
+ */
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+int index_of( char c, const char *s ) {
+    int i;
+
+    for ( i = 0; s[i] != c && s[i] != 0; i++ );
+
+    return s[i] == c ? i : -1;
+}
+
+char *trim( char *s ) {
+    int i;
+
+    for ( i = strlen( s ); ( isblank( s[i] ) || iscntrl( s[i] ) ) && i >= 0;
+          i-- ) {
+        s[i] = '\0';
+    }
+    for ( i = 0; s[i] != '\0' && ( isblank( s[i] ) || iscntrl( s[i] ) ); i++ );
+
+    return ( char * ) &s[i];
+}