Minor refactor of load extension by name impl

Minimize the #ifdef surface area
Localize orig_libpath to retry scope
Send errors to php_error() rathern than stderr

Author: sgolemon

ext/standard/dl.c

@@ -81,7 +81,7 @@ PHPAPI PHP_FUNCTION(dl)
 PHPAPI int php_load_extension(char *filename, int type, int start_now)
 {
 	void *handle;
-	char *libpath, *orig_libpath;
+	char *libpath;
 	zend_module_entry *module_entry;
 	zend_module_entry *(*get_module)(void);
 	int error_type, slash_suffix;
@@ -118,22 +118,20 @@ PHPAPI int php_load_extension(char *filename, int type, int start_now)
 		}
 		if (VCWD_ACCESS(libpath, F_OK)) {
 			/* If file does not exist, consider as extension name and build file name */
-			orig_libpath = libpath;
+			const char *libpath_prefix = "";
+			char *orig_libpath = libpath;
 #if PHP_WIN32
+			libpath_prefix = "php_";
+#endif
 			if (slash_suffix) {
-				spprintf(&libpath, 0, "%sphp_%s." PHP_SHLIB_SUFFIX, extension_dir, filename); /* SAFE */
-			} else {
-				spprintf(&libpath, 0, "%s%cphp_%s." PHP_SHLIB_SUFFIX, extension_dir, DEFAULT_SLASH, filename); /* SAFE */
-			}
-#else
-			if (slash_suffix) {
-				spprintf(&libpath, 0, "%s%s." PHP_SHLIB_SUFFIX, extension_dir, filename); /* SAFE */
+				spprintf(&libpath, 0, "%s%s%s." PHP_SHLIB_SUFFIX, extension_dir, libpath_prefix, filename); /* SAFE */
 			} else {
-				spprintf(&libpath, 0, "%s%c%s." PHP_SHLIB_SUFFIX, extension_dir, DEFAULT_SLASH, filename); /* SAFE */
+				spprintf(&libpath, 0, "%s%c%s%s." PHP_SHLIB_SUFFIX, extension_dir, DEFAULT_SLASH, libpath_prefix, filename); /* SAFE */
 			}
-#endif
+
 			if (VCWD_ACCESS(libpath, F_OK)) {
-				php_error_docref(NULL TSRMLS_CC, error_type, "Cannot access dynamic library '%s' (tried : %s, %s)", filename, orig_libpath, libpath);
+				php_error(error_type, "Cannot access dynamic library '%s' (tried : %s, %s)",
+					filename, orig_libpath, libpath);
 				efree(orig_libpath);
 				efree(libpath);
 				return FAILURE;

main/php_ini.c

@@ -362,7 +362,7 @@ static void php_load_zend_extension_cb(void *arg)
 	if (IS_ABSOLUTE_PATH(filename, length)) {
 		zend_load_extension(filename);
 	} else {
-		char *libpath, *orig_libpath;
+		char *libpath;
 		char *extension_dir = INI_STR("extension_dir");
 		int extension_dir_len = (int)strlen(extension_dir);
 		int slash_suffix = IS_SLASH(extension_dir[extension_dir_len-1]);
@@ -372,30 +372,29 @@ static void php_load_zend_extension_cb(void *arg)
 		} else {
 			spprintf(&libpath, 0, "%s%c%s", extension_dir, DEFAULT_SLASH, filename); /* SAFE */
 		}
+
 		if (VCWD_ACCESS(libpath, F_OK)) {
 			/* If file does not exist, consider as extension name and build file name */
-			orig_libpath = libpath;
+			const char *libpath_prefix = "";
+			char *orig_libpath = libpath;
 #if PHP_WIN32
+			libpath_prefix = "php_";
+#endif
+
 			if (slash_suffix) {
-				spprintf(&libpath, 0, "%sphp_%s." PHP_SHLIB_SUFFIX, extension_dir, filename); /* SAFE */
-			} else {
-				spprintf(&libpath, 0, "%s%cphp_%s." PHP_SHLIB_SUFFIX, extension_dir, DEFAULT_SLASH, filename); /* SAFE */
-			}
-#else
-			if (slash_suffix) {
-				spprintf(&libpath, 0, "%s%s." PHP_SHLIB_SUFFIX, extension_dir, filename); /* SAFE */
+				spprintf(&libpath, 0, "%s%s%s." PHP_SHLIB_SUFFIX, extension_dir, libpath_prefix, filename); /* SAFE */
 			} else {
-				spprintf(&libpath, 0, "%s%c%s." PHP_SHLIB_SUFFIX, extension_dir, DEFAULT_SLASH, filename); /* SAFE */
+				spprintf(&libpath, 0, "%s%c%s%s." PHP_SHLIB_SUFFIX, extension_dir, DEFAULT_SLASH, libpath_prefix, filename); /* SAFE */
 			}
-#endif
+
 			if (VCWD_ACCESS(libpath, F_OK)) {
-				fprintf(stderr, "Cannot access Zend extension %s (Tried: %s, %s)\n", filename, orig_libpath, libpath);
-				/* See http://support.microsoft.com/kb/190351 */
-				fflush(stderr);
+				php_error(E_CORE_WARNING, "Cannot access Zend extension %s (Tried: %s, %s)\n",
+					filename, orig_libpath, libpath);
 				efree(orig_libpath);
 				efree(libpath);
 				return;
 			}
+
 			efree(orig_libpath);
 		}