virDriverLoadModule: Honor libvirt func name tranlsation

There's this unwritten rule in libvirt that vir_function is translated
into virFunction when needed (e.g. in remote protocol definition,
python, ...). Up till now we ignored such translation in driver module
loading and did fine. Well, we didn't have any module with an
underscore in its name. But this will change in next commit. The
problem is, once an a module is dlopen()-ed, we derive register
function name from its name. So instead of "driver_subdriverRegister"
do some magic to turn that into "driverSubdriverRegister".
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/driver.c

@@ -23,6 +23,7 @@
 #include <config.h>
 
 #include <unistd.h>
+#include <c-ctype.h>
 
 #include "driver.h"
 #include "viralloc.h"
@@ -45,7 +46,8 @@ VIR_LOG_INIT("driver");
 void *
 virDriverLoadModule(const char *name)
 {
-    char *modfile = NULL, *regfunc = NULL;
+    char *modfile = NULL, *regfunc = NULL, *fixedname = NULL;
+    char *tmp;
     void *handle = NULL;
     int (*regsym)(void);
 
@@ -72,7 +74,18 @@ virDriverLoadModule(const char *name)
         goto cleanup;
     }
 
-    if (virAsprintfQuiet(&regfunc, "%sRegister", name) < 0) {
+    if (VIR_STRDUP_QUIET(fixedname, name) < 0) {
+        VIR_ERROR(_("out of memory"));
+        goto cleanup;
+    }
+
+    /* convert something_like_this into somethingLikeThis */
+    while ((tmp = strchr(fixedname, '_'))) {
+        memmove(tmp, tmp + 1, strlen(tmp));
+        *tmp = c_toupper(*tmp);
+    }
+
+    if (virAsprintfQuiet(&regfunc, "%sRegister", fixedname) < 0) {
         goto cleanup;
     }
 
@@ -89,11 +102,13 @@ virDriverLoadModule(const char *name)
 
     VIR_FREE(modfile);
     VIR_FREE(regfunc);
+    VIR_FREE(fixedname);
     return handle;
 
  cleanup:
     VIR_FREE(modfile);
     VIR_FREE(regfunc);
+    VIR_FREE(fixedname);
     if (handle)
         dlclose(handle);
     return NULL;