Fixed include of stdint.h (parser.cpp needs the header as well).

[ginac.git] / ginac / parser / default_reader.tpl

diff --git a/ginac/parser/default_reader.tpl b/ginac/parser/default_reader.tpl
index 5f83cfee30402a13cb0a8d0e355972b023310f1d..81f89bf49788fc1811133e5d1b9b9c4d18ad5bd3 100644 (file)
--- a/ginac/parser/default_reader.tpl
+++ b/ginac/parser/default_reader.tpl
@@ -19,6 +19,13 @@ COMMENT a part of GiNaC parser -- construct functions from a byte stream.
 #include "power.h"
 #include "operators.h"
 #include "inifcns.h"
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_STDINT_H
+#include <stdint.h> // for uintptr_t
+#endif
 
 namespace GiNaC
 {
@@ -31,6 +38,31 @@ static ex [+ (get "name") +]_reader(const exvector& ev)
                  (format '#f "~{ev[~a]~^, ~}" (sequence 0 (- nargs 1)))) +]);
 }[+ ENDFOR +]
 
+// function::registered_functions() is protected, but we need to access it
+class registered_functions_hack : public function
+{
+public:
+       static const std::vector<function_options>& get_registered_functions()
+       {
+               return function::registered_functions();
+       }
+private:
+       registered_functions_hack();
+       registered_functions_hack(const registered_functions_hack&);
+       registered_functions_hack& operator=(const registered_functions_hack&);
+};
+
+// Encode an integer into a pointer to a function. Since functions
+// are aligned (the minimal alignment depends on CPU architecture)
+// we can distinguish between pointers and integers.
+static reader_func encode_serial_as_reader_func(unsigned serial)
+{
+       uintptr_t u = (uintptr_t)serial;
+       u = (u << 1) | (uintptr_t)1;
+       reader_func ptr = reinterpret_cast<reader_func>((void *)u);
+       return ptr;
+}
+
 const prototype_table& get_default_reader()
 {
        using std::make_pair;
@@ -42,25 +74,19 @@ const prototype_table& get_default_reader()
                        (if (exist? "args") (get "args") "1")
                        +])] = [+ (get "name") +]_reader;[+
                ENDFOR +]
-               try {
-                       for ( unsigned ser=0; ; ++ser ) {
-                               GiNaC::function f(ser);
-                               std::string name = f.get_name();
-                               for ( std::size_t nargs=0; ; ++nargs ) {
-                                       try {
-                                               function::find_function(name, nargs);
-                                               prototype proto = std::pair<std::string, std::size_t>(name, nargs);
-                                               std::pair<prototype_table::iterator, bool> ins = reader.insert(std::pair<prototype,reader_func>(proto, (reader_func)ser));
-                                               if ( ins.second ) break;
-                                       }
-                                       catch ( std::runtime_error ) { }
-                               }
-                       }
+               std::vector<function_options>::const_iterator it =
+                       registered_functions_hack::get_registered_functions().begin();
+               std::vector<function_options>::const_iterator end =
+                       registered_functions_hack::get_registered_functions().end();
+               unsigned serial = 0;
+               for (; it != end; ++it) {
+                       prototype proto = make_pair(it->get_name(), it->get_nparams());
+                       reader[proto] = encode_serial_as_reader_func(serial);
+                       ++serial;
                }
-               catch ( std::runtime_error ) { }
                initialized = true;
        }
        return reader;
 }
-} // namespace GiNaC
 
+} // namespace GiNaC