1 files changed, 94 insertions, 0 deletions
diff --git a/src/core/dsp/genfile_cache.cpp b/src/core/dsp/genfile_cache.cpp
new file mode 100644
index 0000000..c9b2472
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+++ b/src/core/dsp/genfile_cache.cpp
@@ -0,0 +1,94 @@
+/******************************************************************************
+ * Copyright (c) 2013-2014, Texas Instruments Incorporated - http://www.ti.com/
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions are met:
+ *       * Redistributions of source code must retain the above copyright
+ *         notice, this list of conditions and the following disclaimer.
+ *       * Redistributions in binary form must reproduce the above copyright
+ *         notice, this list of conditions and the following disclaimer in the
+ *         documentation and/or other materials provided with the distribution.
+ *       * Neither the name of Texas Instruments Incorporated nor the
+ *         names of its contributors may be used to endorse or promote products
+ *         derived from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ *   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ *   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ *   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ *   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ *   THE POSSIBILITY OF SUCH DAMAGE.
+ *****************************************************************************/
+#include "genfile_cache.h"
+
+std::string genfile_cache::lookup(llvm::Module *module, std::string options)
+{
+    std::vector<std::vector<std::string> > result;
+    uint32_t hash = convert_mod2crc(module, options);
+
+    std::string query("select value from programs where hash = " +
+              boost::lexical_cast<std::string>(hash));
+
+    result = p_database.query(query.c_str());
+
+    if (!result.empty()) 
+    {
+        string &filename = result[0][0];
+
+        struct stat statbuf;
+        if (stat(filename.c_str(), &statbuf) == 0)
+            return filename;
+        /*-----------------------------------------------------------------
+        * if (the cached filename no longer exists, remove it from the DB
+        *----------------------------------------------------------------*/
+        else
+        {
+            std::string q2("delete from programs where hash = " +
+                  boost::lexical_cast<std::string>(hash));
+
+            p_database.query(q2.c_str());
+            return std::string();
+        }
+    }
+    else                 return std::string();
+}
+
+void genfile_cache::remember(const char *outfile, llvm::Module *module, 
+                             std::string options)
+{
+    uint32_t hash = convert_mod2crc(module, options);
+    std::string query("insert into programs(hash, value) values("
+                  + boost::lexical_cast<std::string>(hash) 
+                  + ", \""
+                  + string(outfile)
+                  + "\");");
+
+    p_database.query(query.c_str());
+}
+
+uint32_t genfile_cache::convert_mod2crc(llvm::Module *module, 
+                                        std::string options) 
+{
+    string llvm_ir;
+
+    llvm::raw_string_ostream ostream(llvm_ir);
+    llvm::WriteBitcodeToFile(module, ostream);
+    ostream.str();
+
+    llvm_ir += options;
+
+    return get_crc(llvm_ir);
+}
+
+uint32_t genfile_cache::get_crc(std::string& my_string)
+{
+    boost::crc_32_type result;
+    result.process_bytes(my_string.data(), my_string.length());
+    return result.checksum();
+}