From f6cd72d39cdc7a034b36ad73d613f6f268826e48 Mon Sep 17 00:00:00 2001
From: graehl <graehl@ec762483-ff6d-05da-a07a-a48fb63a330f>
Date: Tue, 20 Jul 2010 23:57:46 +0000
Subject: fabulous string tokenization tested

git-svn-id: https://ws10smt.googlecode.com/svn/trunk@350 ec762483-ff6d-05da-a07a-a48fb63a330f
---
 decoder/sentences.h       |  5 ++++-
 decoder/stringlib.h       | 30 ++++++++++++++++++++++++++----
 decoder/stringlib_test.cc | 17 +++++++++++++++++
 decoder/value_array.h     |  2 ++
 4 files changed, 49 insertions(+), 5 deletions(-)
 create mode 100755 decoder/stringlib_test.cc

diff --git a/decoder/sentences.h b/decoder/sentences.h
index 622a6f43..6ab216bf 100755
--- a/decoder/sentences.h
+++ b/decoder/sentences.h
@@ -15,9 +15,12 @@ inline std::ostream & operator<<(std::ostream &out,Sentence const& s) {
 
 inline void StringToSentence(std::string const& str,Sentence &s) {
   using namespace std;
-  vector<string> ss=SplitOnWhitespace(str);
   s.clear();
+  TD::ConvertSentence(str,&s);
+/*  vector<string> ss=SplitOnWhitespace(str);
   transform(ss.begin(),ss.end(),back_inserter(s),ToTD());
+*/
+
 }
 
 inline Sentence StringToSentence(std::string const& str) {
diff --git a/decoder/stringlib.h b/decoder/stringlib.h
index a7c6c3c4..a0e03624 100644
--- a/decoder/stringlib.h
+++ b/decoder/stringlib.h
@@ -1,6 +1,13 @@
 #ifndef CDEC_STRINGLIB_H_
 #define CDEC_STRINGLIB_H_
 
+#ifdef STRINGLIB_DEBUG
+#include <iostream>
+#define SLIBDBG(x) do { std::cerr<<"DBG(stringlib): "<<x<<std::endl; } while(0)
+#else
+#define SLIBDBG(x)
+#endif
+
 #include <map>
 #include <vector>
 #include <cctype>
@@ -112,20 +119,26 @@ inline bool IsWordSep(char c) {
 template <class F>
 // *end must be 0 (i.e. [p,end] is valid storage, which will be written to with 0 to separate c string tokens
 void VisitTokens(char *p,char *const end,F f) {
+  SLIBDBG("VisitTokens. p="<<p<<" Nleft="<<end-p);
   if (p==end) return;
   char *last; // 0 terminated already.  this is ok to mutilate because s is a copy of the string passed in.  well, barring copy on write i guess.
   while(IsWordSep(*p)) { ++p;if (p==end) return; } // skip init whitespace
   last=p; // first non-ws char
   for(;;) {
-    ++p;
-    // now last is a non-ws char, and p is one past it.
+    SLIBDBG("Start of word. last="<<last<<" *p="<<*p<<" Nleft="<<end-p);
+    // last==p, pointing at first non-ws char not yet translated into f(word) call
     for(;;) {// p to end of word
-      if (p==end) { f(last); return; }
-      if (!IsWordSep(*p)) break;
       ++p;
+      if (p==end) {
+        f(last);
+        SLIBDBG("Returning. word="<<last<<" *p="<<*p<<" Nleft="<<end-p);
+        return;
+      }
+      if (IsWordSep(*p)) break;
     }
     *p=0;
     f(last);
+    SLIBDBG("End of word. word="<<last<<" rest="<<p+1<<" Nleft="<<end-p);
     for(;;) { // again skip extra whitespace
       ++p;
       if (p==end) return;
@@ -135,15 +148,24 @@ void VisitTokens(char *p,char *const end,F f) {
   }
 }
 
+template <class F>
+void VisitTokens(char *p,F f) {
+  VisitTokens(p,p+std::strlen(p),f);
+}
+
+
 template <class F>
 void VisitTokens(std::string const& s,F f) {
+  if (0) {
   std::vector<std::string> ss=SplitOnWhitespace(s);
   for (int i=0;i<ss.size();++i)
     f(ss[i]);
   return;
+  }
   //FIXME:
   if (s.empty()) return;
   mutable_c_str mp(s);
+  SLIBDBG("mp="<<mp.p);
   VisitTokens(mp.p,mp.p+s.size(),f);
 }
 
diff --git a/decoder/stringlib_test.cc b/decoder/stringlib_test.cc
new file mode 100755
index 00000000..ea39f30f
--- /dev/null
+++ b/decoder/stringlib_test.cc
@@ -0,0 +1,17 @@
+#define STRINGLIB_DEBUG
+#include "stringlib.h"
+
+using namespace std;
+struct print {
+  template <class S>
+  void operator()(S const& s) const {
+    cout<<s<<endl;
+  }
+};
+
+int main(int argc, char *argv[]) {
+  char *p=" 1 are u 2 serious?";
+  std::string const& w="verylongword";
+  VisitTokens(p,print());
+  VisitTokens(w,print());
+}
diff --git a/decoder/value_array.h b/decoder/value_array.h
index 7401938a..042247a1 100755
--- a/decoder/value_array.h
+++ b/decoder/value_array.h
@@ -17,6 +17,8 @@ template <class T, class A = std::allocator<T> >
 class ValueArray : A // private inheritance so stateless allocator adds no size.
 {
 public:
+  const int SV_MAX=sizeof(T)/sizeof(T*)>1?sizeof(T)/sizeof(T*):1;
+  //space optimization: SV_MAX T will fit inside what would otherwise be a pointer to heap data.  todo in the far future if bored.
   typedef T value_type;
   typedef T& reference;
   typedef T const& const_reference;
-- 
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