Merge devel code into the trunk.

[tinyos-2.x.git] / support / sdk / java / net / tinyos / packet / ParseArgs.java

diff --git a/support/sdk/java/net/tinyos/packet/ParseArgs.java b/support/sdk/java/net/tinyos/packet/ParseArgs.java
new file mode 100644 (file)
index 0000000..5e9ed3a
--- /dev/null
+++ b/support/sdk/java/net/tinyos/packet/ParseArgs.java
@@ -0,0 +1,41 @@
+    /**
+     * Parse a string into tokens based on a sequence of delimiters
+     * Given delimiters (single characters) d1, d2, ..., dn, this
+     * class recognises strings of the form s0[d1s1][d2s2]...[dnsn],
+     * where s<i-1> does not contain character di
+     * This is unambiguous if all di are distinct. If not, strings
+     * are attributed to the earliest possible si (so if the delimiters
+     * are : and :, and the input string is foo:bar, then s0 is foo,
+     * s1 is bar and s2 is null
+     */
+package net.tinyos.packet;
+
+class ParseArgs {
+       String tokens[];
+       int tokenIndex;
+
+       ParseArgs(String s, String delimiterSequence) {
+           int count = delimiterSequence.length();
+           tokens = new String[count + 1];
+           tokenIndex = 0;
+
+           // Fill in the tokens
+           int i = 0, lastMatch = 0;
+           while (i < count) {
+               int pos = s.indexOf(delimiterSequence.charAt(i++));
+
+               if (pos >= 0) {
+                   // When we finally find a delimiter, we know where
+                   // the last token ended
+                   tokens[lastMatch] = s.substring(0, pos);
+                   lastMatch = i;
+                   s = s.substring(pos + 1);
+               }
+           }
+           tokens[lastMatch] = s;
+       }
+
+       String next() {
+           return tokens[tokenIndex++];
+       }
+}