2006-11-08 Frank Ch. Eigler <fche@elastic.org>

	* util.h (lex_cast_qstring): Move def'n here.  Also quote \.
	(stringify, lex_cast, lex_cast_hex): Move defn here.
	* buildrun.cxx, elaborate.cxx, main.cxx, staptree.cxx: Adapt.

1 files changed, 63 insertions, 4 deletions

diff --git a/util.h b/util.h
index 01f254c7..2c8848bb 100644
--- a/util.h
+++ b/util.h
@@ -1,13 +1,72 @@
 #include <string>
 #include <vector>
+#include <iostream>
+#include <sstream>
+#include <stdexcept>
 
-const char *get_home_directory(void);
 
+const char *get_home_directory(void);
 int copy_file(const char *src, const char *dest);
-
 int create_dir(const char *dir);
-
 void tokenize(const std::string& str, std::vector<std::string>& tokens,
 	      const std::string& delimiters);
-
 bool find_executable(const char *name, std::string& retpath);
+
+
+// stringification generics
+
+
+template <typename T>
+inline std::string
+stringify(T t)
+{
+  std::ostringstream s;
+  s << t;
+  return s.str ();
+}
+
+
+template <typename OUT, typename IN> 
+inline OUT lex_cast(IN const & in)
+{
+  std::stringstream ss;
+  OUT out;
+  if (!(ss << in && ss >> out))
+    throw std::runtime_error("bad lexical cast");
+  return out;
+}
+
+
+template <typename OUT, typename IN> 
+inline OUT
+lex_cast_hex(IN const & in)
+{
+  std::stringstream ss;
+  OUT out;
+  if (!(ss << std::ios::hex << std::ios::showbase << in && ss >> out))
+    throw std::runtime_error("bad lexical cast");
+  return out;
+}
+
+
+// Return as quoted string, so that when compiled as a C literal, it
+// would print to the user out nicely.
+template <typename IN> 
+inline std::string
+lex_cast_qstring(IN const & in)
+{
+  std::stringstream ss;
+  std::string out, out2;
+  if (!(ss << in))
+    throw std::runtime_error("bad lexical cast");
+  out = ss.str();
+  out2 += '"';
+  for (unsigned i=0; i<out.length(); i++)
+    {
+      if (out[i] == '"' || out[i] == '\\') // XXX others?
+	out2 += '\\';
+      out2 += out[i];
+    }
+  out2 += '"';
+  return out2;
+}