signed/unsigned comparison warning fixed

[wxWidgets.git] / src / unix / dlunix.cpp

diff --git a/src/unix/dlunix.cpp b/src/unix/dlunix.cpp
index 21b00d22a8bae6fcb698f3966767afccdb0f8eed..7e78ccb774d2e93ce224f6efa49900e79a0ee074 100644 (file)
--- a/src/unix/dlunix.cpp
+++ b/src/unix/dlunix.cpp
@@ -49,7 +49,7 @@
 #endif
 
 #ifndef RTLD_GLOBAL
-    #define RTLD_GLOBAL
+    #define RTLD_GLOBAL 0
 #endif
 
 
@@ -98,29 +98,6 @@
 
 static char dl_last_error[1024];
 
-static
-void TranslateError(const char *path, int number)
-{
-    unsigned int index;
-    static char *OFIErrorStrings[] =
-    {
-        "%s(%d): Object Image Load Failure\n",
-        "%s(%d): Object Image Load Success\n",
-        "%s(%d): Not an recognisable object file\n",
-        "%s(%d): No valid architecture\n",
-        "%s(%d): Object image has an invalid format\n",
-        "%s(%d): Invalid access (permissions?)\n",
-        "%s(%d): Unknown error code from NSCreateObjectFileImageFromFile\n",
-    };
-#define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0]))
-
-    index = number;
-    if (index > NUM_OFI_ERRORS - 1) {
-        index = NUM_OFI_ERRORS - 1;
-    }
-    sprintf(dl_last_error, OFIErrorStrings[index], path, number);
-}
-
 const char *dlerror()
 {
     return dl_last_error;
@@ -131,10 +108,29 @@ void *dlopen(const char *path, int WXUNUSED(mode) /* mode is ignored */)
     NSObjectFileImage ofile;
     NSModule handle = NULL;
 
-    int dyld_result = NSCreateObjectFileImageFromFile(path, &ofile);
+    unsigned dyld_result = NSCreateObjectFileImageFromFile(path, &ofile);
     if ( dyld_result != NSObjectFileImageSuccess )
     {
         handle = NULL;
+
+        static const char *errorStrings[] =
+        {
+            "%d: Object Image Load Failure",
+            "%d: Object Image Load Success",
+            "%d: Not an recognisable object file",
+            "%d: No valid architecture",
+            "%d: Object image has an invalid format",
+            "%d: Invalid access (permissions?)",
+            "%d: Unknown error code from NSCreateObjectFileImageFromFile"
+        };
+
+        const int index = dyld_result < WXSIZEOF(errorStrings)
+                            ? dyld_result
+                            : WXSIZEOF(errorStrings) - 1;
+
+        // this call to sprintf() is safe as strings above are fixed at
+        // compile-time and are shorter than WXSIZEOF(dl_last_error)
+        sprintf(dl_last_error, errorStrings[index], dyld_result);
     }
     else
     {
@@ -145,17 +141,27 @@ void *dlopen(const char *path, int WXUNUSED(mode) /* mode is ignored */)
                     NSLINKMODULE_OPTION_BINDNOW |
                     NSLINKMODULE_OPTION_RETURN_ON_ERROR
                  );
+
+        if ( !handle )
+        {
+            NSLinkEditErrors err;
+            int code;
+            const char *filename;
+            const char *errmsg;
+
+            NSLinkEditError(&err, &code, &filename, &errmsg);
+            strncpy(dl_last_error, errmsg, WXSIZEOF(dl_last_error)-1);
+            dl_last_error[WXSIZEOF(dl_last_error)-1] = '\0';
+        }
     }
 
-    if ( !handle )
-        TranslateError(path, dyld_result);
 
     return handle;
 }
 
 int dlclose(void *handle)
 {
-    NSUnLinkModule( handle, NSUNLINKMODULE_OPTION_NONE);
+    NSUnLinkModule((NSModule)handle, NSUNLINKMODULE_OPTION_NONE);
     return 0;
 }
 
@@ -169,7 +175,7 @@ void *dlsym(void *handle, const char *symbol)
     p[0] = '_';
     strcpy(p + 1, symbol);
 
-    NSSymbol nsSymbol = NSLookupSymbolInModule( handle, p );
+    NSSymbol nsSymbol = NSLookupSymbolInModule((NSModule)handle, p );
     return nsSymbol ? NSAddressOfSymbol(nsSymbol) : NULL;
 }
 
@@ -191,24 +197,17 @@ wxDllType wxDynamicLibrary::GetProgramHandle()
 /* static */
 wxDllType wxDynamicLibrary::RawLoad(const wxString& libname, int flags)
 {
-    wxASSERT_MSG( (flags & wxDL_NOW) == 0,
+    wxASSERT_MSG( !(flags & wxDL_NOW) || !(flags & wxDL_LAZY),
                   _T("wxDL_LAZY and wxDL_NOW are mutually exclusive.") );
 
 #ifdef USE_POSIX_DL_FUNCS
-    int rtldFlags = 0;
+    // we need to use either RTLD_NOW or RTLD_LAZY because if we call dlopen()
+    // with flags == 0 recent versions of glibc just fail the call, so use
+    // RTLD_NOW even if wxDL_NOW was not specified
+    int rtldFlags = flags & wxDL_LAZY ? RTLD_LAZY : RTLD_NOW;
 
-    if ( flags & wxDL_LAZY )
-    {
-        rtldFlags |= RTLD_LAZY;
-    }
-    if ( flags & wxDL_NOW )
-    {
-        rtldFlags |= RTLD_NOW;
-    }
     if ( flags & wxDL_GLOBAL )
-    {
         rtldFlags |= RTLD_GLOBAL;
-    }
 
     return dlopen(libname.fn_str(), rtldFlags);
 #else // !USE_POSIX_DL_FUNCS
@@ -300,7 +299,7 @@ public:
         wxDynamicLibraryDetails *details = new wxDynamicLibraryDetails;
         details->m_path = path;
         details->m_name = path.AfterLast(_T('/'));
-        details->m_address = wx_reinterpret_cast(void *, start);
+        details->m_address = wxUIntToPtr(start);
         details->m_length = end - start;
 
         // try to extract the library version from its name
@@ -340,8 +339,8 @@ wxDynamicLibraryDetailsArray wxDynamicLibrary::ListLoaded()
     {
         // details of the module currently being parsed
         wxString pathCur;
-        unsigned long startCur,
-                      endCur;
+        unsigned long startCur = 0,
+                      endCur = 0;
 
         char path[1024];
         char buf[1024];