From c998d05c355518ba3b7e27f6833e00684d9c5764 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 19 Nov 2014 11:51:17 +0200
Subject: Implement bulk API code generation

---
 odb/oracle/statement.cxx | 37 +++++++++++++++++--------------------
 odb/oracle/statement.hxx | 26 +++++++++++++++++++++++---
 2 files changed, 40 insertions(+), 23 deletions(-)

diff --git a/odb/oracle/statement.cxx b/odb/oracle/statement.cxx
index c0c0741..023e41f 100644
--- a/odb/oracle/statement.cxx
+++ b/odb/oracle/statement.cxx
@@ -71,6 +71,14 @@ namespace odb
       SQLT_CLOB         // bind::nclob
     };
 
+    template <typename T>
+    inline T*
+    offset (T* base, size_t count, size_t size)
+    {
+      return reinterpret_cast<T*> (
+        reinterpret_cast<char*> (base) + count * size);
+    }
+
     extern "C" sb4
     odb_oracle_param_callback_proxy (void* context,
                                      OCIBind*,
@@ -86,19 +94,15 @@ namespace odb
       // Offset the data based on the current iteration and skip size (stored
       // in capacity).
       //
-      sb2* ind (reinterpret_cast<sb2*> (
-                  reinterpret_cast<char*> (b.indicator) + it * b.capacity));
+      sb2* ind (offset (b.indicator, it, b.capacity));
 
       // Only call the callback if the parameter is not NULL.
       //
       if (*ind != -1)
       {
-        lob* l (reinterpret_cast<lob*> (
-                  static_cast<char*> (b.buffer) + it * b.capacity));
-
+        lob* l (static_cast<lob*> (offset (b.buffer, it, b.capacity)));
         lob_callback* cb (
-          reinterpret_cast<lob_callback*> (
-            reinterpret_cast<char*> (b.callback) + it * b.capacity));
+          static_cast<lob_callback*> (offset (b.callback, it, b.capacity)));
 
         chunk_position pos;
         if (!(*cb->callback.param) (
@@ -605,8 +609,7 @@ namespace odb
               for (size_t i (0); i != batch;)
               {
                 l->buffer = &lob_buffer;
-                l = reinterpret_cast<lob*> (
-                  static_cast<char*> (b->buffer) + ++i * skip);
+                l = static_cast<lob*> (offset (b->buffer, ++i, skip));
               }
             }
 
@@ -1816,13 +1819,11 @@ namespace odb
       // Offset the data based on the current iteration and skip size.
       // The id is always first.
       //
-      sb2* ind (reinterpret_cast<sb2*> (
-                  reinterpret_cast<char*> (
-                    ret.bind[0].indicator) + it * ret.skip));
-
       *buffer = 0;
       *size = 0;
       *piece = OCI_ONE_PIECE;
+
+      sb2* ind (offset (ret.bind[0].indicator, it, ret.skip));
       *ind = -1;
       *indicator = ind;
 
@@ -1846,7 +1847,7 @@ namespace odb
 
       // Offset the data based on the current iteration and skip size.
       //
-      *buffer = static_cast<char*> (b.buffer) + it * skip;
+      *buffer = offset (b.buffer, it, skip);
 
       if (b.type == bind::number)
       {
@@ -1870,9 +1871,7 @@ namespace odb
         if (st.ret_prev_ != 0)
           *st.ret_prev_ = static_cast<ub2> (st.ret_size_);
 
-        st.ret_prev_ = reinterpret_cast<ub2*> (
-          reinterpret_cast<char*> (b.size) + it * skip);
-
+        st.ret_prev_ = offset (b.size, it, skip);
         *size = &st.ret_size_;
       }
 
@@ -1881,9 +1880,7 @@ namespace odb
       //
       **size = b.capacity;
 
-      *indicator = reinterpret_cast<sb2*> (
-        reinterpret_cast<char*> (b.indicator) + it * skip);
-
+      *indicator = offset (b.indicator, it, skip);
       *rcode = 0;
       *piece = OCI_ONE_PIECE;
 
diff --git a/odb/oracle/statement.hxx b/odb/oracle/statement.hxx
index 83ce5f7..6a5d604 100644
--- a/odb/oracle/statement.hxx
+++ b/odb/oracle/statement.hxx
@@ -318,7 +318,10 @@ namespace odb
       // Return the number of parameter sets (out of n) that were attempted.
       //
       std::size_t
-      execute (std::size_t n, multiple_exceptions*);
+      execute (std::size_t n, multiple_exceptions& mex)
+      {
+        return execute (n, &mex);
+      }
 
       // Return true if successful and false if this row is a duplicate.
       // All other errors are reported via exceptions.
@@ -341,6 +344,9 @@ namespace odb
       void
       init (binding& param);
 
+      std::size_t
+      execute (std::size_t, multiple_exceptions*);
+
       void
       fetch (sword r, sb4 code);
 
@@ -399,7 +405,10 @@ namespace odb
       // Return the number of parameter sets (out of n) that were attempted.
       //
       std::size_t
-      execute (std::size_t n, multiple_exceptions*);
+      execute (std::size_t n, multiple_exceptions& mex)
+      {
+        return execute (n, &mex);
+      }
 
       // Return the number of rows affected (deleted) by the parameter
       // set. If this is a batch (n > 1 in execute() call above) and it
@@ -424,6 +433,10 @@ namespace odb
       update_statement& operator= (const update_statement&);
 
     private:
+      std::size_t
+      execute (std::size_t, multiple_exceptions*);
+
+    private:
       bool unique_;
       unsigned long long result_;
     };
@@ -470,7 +483,10 @@ namespace odb
       // Return the number of parameter sets (out of n) that were attempted.
       //
       std::size_t
-      execute (std::size_t n, multiple_exceptions*);
+      execute (std::size_t n, multiple_exceptions& mex)
+      {
+        return execute (n, &mex);
+      }
 
       // Return the number of rows affected (deleted) by the parameter
       // set. If this is a batch (n > 1 in execute() call above) and it
@@ -495,6 +511,10 @@ namespace odb
       delete_statement& operator= (const delete_statement&);
 
     private:
+      std::size_t
+      execute (std::size_t, multiple_exceptions*);
+
+    private:
       bool unique_;
       unsigned long long result_;
     };
-- 
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