make DateParser::TimeComposer handle milliseconds properly...

src/dateparser.h

Index: src/dateparser.h
===================================================================
--- src/dateparser.h	(revision 5888)
+++ src/dateparser.h	(working copy)
@@ -87,6 +87,19 @@
       return n;
     }
 
+    // Read a string of digits as an unsigned number of milliseconds (cap just
+    // below kMaxInt).
+    int ReadMilliseconds() {

[Lasse Reichstein, 2010/11/25 10:17:19]

Seems like overkill (and potentially fragile) to read and parse all those
digits, and then throwing them away by dividing.

How about just reading the first up-to-three digits and collect them in a
result. Then, if reading less than three, multiply it by ten until it's properly
aligned (so .5 becomes 500). Then skip any following digits.
This avoids having to check against kMaxInt, and doesn't limit the number of
digits arbitrarily.

+      has_read_number_ = true;
+      int n;
+      int i = 0;
+      for (n = 0; IsAsciiDigit() && n < kMaxInt / 10 - 1 && i < 3; Next()) {
+        n = n * 10 + ch_ - '0';
+        i++;
+      }
+      return n * pow(10, 3 - i);
+    }
+
     // Read a word (sequence of chars. >= 'A'), fill the given buffer with a
     // lower-case prefix, and pad any remainder of the buffer with zeroes.
     // Return word length.