WIP: Moved sources int src/, separated most of the source code from Perl.

The XS was left only for the unit / integration tests, and it links
libslic3r only. No wxWidgets are allowed to be used from Perl starting
from now.

src/libslic3r/Utils.hpp

@@ -0,0 +1,100 @@
+#ifndef slic3r_Utils_hpp_
+#define slic3r_Utils_hpp_
+
+#include <locale>
+
+#include "libslic3r.h"
+
+namespace Slic3r {
+
+extern void set_logging_level(unsigned int level);
+extern void trace(unsigned int level, const char *message);
+extern void disable_multi_threading();
+
+// Set a path with GUI resource files.
+void set_var_dir(const std::string &path);
+// Return a full path to the GUI resource files.
+const std::string& var_dir();
+// Return a full resource path for a file_name.
+std::string var(const std::string &file_name);
+
+// Set a path with various static definition data (for example the initial config bundles).
+void set_resources_dir(const std::string &path);
+// Return a full path to the resources directory.
+const std::string& resources_dir();
+
+// Set a path with GUI localization files.
+void set_local_dir(const std::string &path);
+// Return a full path to the localization directory.
+const std::string& localization_dir();
+
+// Set a path with preset files.
+void set_data_dir(const std::string &path);
+// Return a full path to the GUI resource files.
+const std::string& data_dir();
+
+// A special type for strings encoded in the local Windows 8-bit code page.
+// This type is only needed for Perl bindings to relay to Perl that the string is raw, not UTF-8 encoded.
+typedef std::string local_encoded_string;
+
+// Convert an UTF-8 encoded string into local coding.
+// On Windows, the UTF-8 string is converted to a local 8-bit code page.
+// On OSX and Linux, this function does no conversion and returns a copy of the source string.
+extern local_encoded_string encode_path(const char *src);
+extern std::string decode_path(const char *src);
+extern std::string normalize_utf8_nfc(const char *src);
+
+// Safely rename a file even if the target exists.
+// On Windows, the file explorer (or anti-virus or whatever else) often locks the file
+// for a short while, so the file may not be movable. Retry while we see recoverable errors.
+extern int rename_file(const std::string &from, const std::string &to);
+
+// Copy a file, adjust the access attributes, so that the target is writable.
+extern int copy_file(const std::string &from, const std::string &to);
+
+// File path / name / extension splitting utilities, working with UTF-8,
+// to be published to Perl.
+namespace PerlUtils {
+    // Get a file name including the extension.
+    extern std::string path_to_filename(const char *src);
+    // Get a file name without the extension.
+    extern std::string path_to_stem(const char *src);
+    // Get just the extension.
+    extern std::string path_to_extension(const char *src);
+    // Get a directory without the trailing slash.
+    extern std::string path_to_parent_path(const char *src);
+};
+
+// Timestamp formatted for header_slic3r_generated().
+extern std::string timestamp_str();
+// Standard "generated by Slic3r version xxx timestamp xxx" header string, 
+// to be placed at the top of Slic3r generated files.
+inline std::string header_slic3r_generated() { return std::string("generated by " SLIC3R_FORK_NAME " " SLIC3R_VERSION " " ) + timestamp_str(); }
+
+// getpid platform wrapper
+extern unsigned get_current_pid();
+
+// Compute the next highest power of 2 of 32-bit v
+// http://graphics.stanford.edu/~seander/bithacks.html
+template<typename T>
+inline T next_highest_power_of_2(T v)
+{
+	if (v != 0)
+	    -- v;
+    v |= v >> 1;
+    v |= v >> 2;
+    v |= v >> 4;
+    if (sizeof(T) >= sizeof(uint16_t))
+    	v |= v >> 8;
+    if (sizeof(T) >= sizeof(uint32_t))
+	    v |= v >> 16;
+    if (sizeof(T) >= sizeof(uint64_t))
+	    v |= v >> 32;
+    return ++ v;
+}
+
+extern std::string xml_escape(std::string text);
+
+} // namespace Slic3r
+
+#endif // slic3r_Utils_hpp_