Fix computation of file:// urls from paths

--HG--
branch : WINDOWSPORT

src/utils/debuglog.cpp

@@ -74,7 +74,7 @@ class DLFWImpl {
 	    fp = fopen(filename, (truncate) ? "w" : "a");
 	    if (fp) {
 		setvbuf(fp, 0, _IOLBF, BUFSIZ);
-#ifdef O_APPEND
+#if defined(O_APPEND) && !defined(_WIN32)
 		{
 		    int flgs = 0;
 		    fcntl(fileno(fp), F_GETFL, &flgs);

src/utils/pathut.cpp

@@ -22,6 +22,7 @@
 #include "safefcntl.h"
 #include "safeunistd.h"
 #include "dirent.h"
+#include "cstr.h"
 #ifdef _WIN32
 #include "safewindows.h"
 #else
@@ -818,6 +819,17 @@ string fileurltolocalpath(string url)
     return url;
 }
 
+string path_pathtofileurl(const string& path)
+{
+	// We're supposed to receive a canonic absolute path, but on windows we
+	// may need to add a '/' in front of the drive spec
+	string url(cstr_fileu);
+	if (path.empty() || path[0] != '/')
+		url.push_back('/');
+	url += path;
+	return url;
+}
+
 bool urlisfileurl(const string& url)
 {
     return url.find("file://") == 0;

src/utils/pathut.h

@@ -109,6 +109,9 @@ extern bool path_isabsolute(const std::string& s);
 /// Test if path is root (x:/). root is defined by root/.. == root
 extern bool path_isroot(const std::string& p);
 
+/// Turn absolute path into file:// url
+extern std::string path_pathtofileurl(const std::string& path);
+
 /// Temporary file class
 class TempFileInternal {
 public: