Implemented FR #48767 (SplFileInfo::getExtension())

UPGRADING

@@ -329,6 +329,9 @@ UPGRADE NOTES - PHP X.Y
 
      h. New methods
 
+       - DirectoryIterator
+         - DirectoryIterator::getExtension()
+
        - Reflection:
          - ReflectionClass::isCloneable()
          - ReflectionClass::getTraits()
@@ -339,6 +342,9 @@ UPGRADE NOTES - PHP X.Y
        - PDO_dblib
          - PDO::newRowset()
 
+       - SplFileInfo
+         - SplFileInfo::getExtension()
+
        - SplFileObject
          - SplFileObject::fputcsv()
 

ext/spl/spl_directory.c

@@ -844,6 +844,66 @@ SPL_METHOD(DirectoryIterator, getFilename)
 }
 /* }}} */
 
+/* {{{ proto string SplFileInfo::getExtension()
+   Returns file extension component of path */
+SPL_METHOD(SplFileInfo, getExtension)
+{
+	spl_filesystem_object *intern = (spl_filesystem_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
+	char *fname, *p;
+	size_t flen;
+	int path_len, idx;
+
+	if (zend_parse_parameters_none() == FAILURE) {
+		return;
+	}
+
+	spl_filesystem_object_get_path(intern, &path_len TSRMLS_CC);
+
+	if (path_len && path_len < intern->file_name_len) {
+		fname = intern->file_name + path_len + 1;
+		flen = intern->file_name_len - (path_len + 1);
+	} else {
+		fname = intern->file_name;
+		flen = intern->file_name_len;
+	}
+
+	php_basename(fname, flen, NULL, 0, &fname, &flen TSRMLS_CC);
+
+	p = zend_memrchr(fname, '.', flen);
+	if (p) {
+		idx = p - fname;
+		RETURN_STRINGL(fname + idx + 1, flen - idx - 1, 1);
+	}
+
+	RETURN_EMPTY_STRING();
+}
+/* }}}*/
+
+/* {{{ proto string DirectoryIterator::getExtension()
+   Returns the file extension component of path */
+SPL_METHOD(DirectoryIterator, getExtension)
+{
+	spl_filesystem_object *intern = (spl_filesystem_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
+	char *fname, *p;
+	size_t flen;
+	int idx;
+
+	if (zend_parse_parameters_none() == FAILURE) {
+		return;
+	}
+
+	php_basename(intern->u.dir.entry.d_name, strlen(intern->u.dir.entry.d_name), NULL, 0, &fname, &flen TSRMLS_CC);
+
+	p = zend_memrchr(fname, '.', flen);
+	if (p) {
+		idx = p - fname;
+		RETURN_STRINGL(fname + idx + 1, flen - idx - 1, 1);
+	}
+
+	RETURN_EMPTY_STRING();
+}
+/* }}} */
+
 /* {{{ proto string SplFileInfo::getBasename([string $suffix]) U
    Returns filename component of path */
 SPL_METHOD(SplFileInfo, getBasename)
@@ -1778,6 +1838,7 @@ static const zend_function_entry spl_SplFileInfo_functions[] = {
 	SPL_ME(SplFileInfo,       __construct,   arginfo_info___construct, ZEND_ACC_PUBLIC)
 	SPL_ME(SplFileInfo,       getPath,       arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)
 	SPL_ME(SplFileInfo,       getFilename,   arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)
+	SPL_ME(SplFileInfo,       getExtension,  arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)
 	SPL_ME(SplFileInfo,       getBasename,   arginfo_optinalSuffix, ZEND_ACC_PUBLIC)
 	SPL_ME(SplFileInfo,       getPathname,   arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)
 	SPL_ME(SplFileInfo,       getPerms,      arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)
@@ -1821,6 +1882,7 @@ ZEND_END_ARG_INFO();
 static const zend_function_entry spl_DirectoryIterator_functions[] = {
 	SPL_ME(DirectoryIterator, __construct,   arginfo_dir___construct, ZEND_ACC_PUBLIC)
 	SPL_ME(DirectoryIterator, getFilename,   arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)
+	SPL_ME(DirectoryIterator, getExtension,  arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)
 	SPL_ME(DirectoryIterator, getBasename,   arginfo_optinalSuffix, ZEND_ACC_PUBLIC)
 	SPL_ME(DirectoryIterator, isDot,         arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)
 	SPL_ME(DirectoryIterator, rewind,        arginfo_splfileinfo_void, ZEND_ACC_PUBLIC)

ext/spl/tests/DirectoryIterator_getExtension_basic.phpt

@@ -0,0 +1,51 @@
+--TEST--
+SPL: DirectoryIterator::getExtension() basic test
+--FILE--
+<?php
+$dir = __DIR__ . DIRECTORY_SEPARATOR . md5('DirectoryIterator::getExtension') . DIRECTORY_SEPARATOR;
+mkdir($dir);
+
+$files = array('test.txt', 'test.extension', 'test..', 'test.', 'test');
+foreach ($files as $file) {
+    touch($dir . $file);
+}
+
+$dit_exts = array();
+$nfo_exts = array();
+$skip = array('.', '..');
+
+foreach (new DirectoryIterator($dir) as $file) {
+    if (in_array($file->getFilename(), $skip)) {
+        continue;
+    }
+    $dit_exts[] = $file->getExtension();
+    $nfo_exts[] = pathinfo($file->getFilename(), PATHINFO_EXTENSION);
+}
+var_dump($dit_exts === $nfo_exts);
+sort($dit_exts);
+var_dump($dit_exts);
+?>
+--CLEAN--
+<?php
+$dir   = __DIR__ . DIRECTORY_SEPARATOR . md5('DirectoryIterator::getExtension') . DIRECTORY_SEPARATOR;
+$files = array('test.txt', 'test.extension', 'test..', 'test.', 'test');
+foreach ($files as $file) {
+    unlink($dir . $file);
+}
+rmdir($dir);
+?>
+--EXPECTF--
+bool(true)
+array(5) {
+  [0]=>
+  string(0) ""
+  [1]=>
+  string(0) ""
+  [2]=>
+  string(0) ""
+  [3]=>
+  string(9) "extension"
+  [4]=>
+  string(3) "txt"
+}
+

ext/spl/tests/SplFileInfo_getExtension_basic.phpt

@@ -0,0 +1,31 @@
+--TEST--
+SPL: SplFileInfo::getExtension() basic test
+--FILE--
+<?php
+$file = md5('SplFileInfo::getExtension');
+$exts = array('.txt', '.extension', '..', '.', '');
+foreach ($exts as $ext) {
+    touch($file . $ext);
+    $info = new SplFileInfo($file . $ext);
+    var_dump($info->getExtension(), pathinfo($file . $ext, PATHINFO_EXTENSION));
+}
+?>
+--CLEAN--
+<?php
+$file = md5('SplFileInfo::getExtension');
+$exts = array('.txt', '.extension', '..', '.', '');
+foreach ($exts as $ext) {
+    unlink($file . $ext);
+}
+?>
+--EXPECTF--
+string(3) "txt"
+string(3) "txt"
+string(9) "extension"
+string(9) "extension"
+string(0) ""
+string(0) ""
+string(0) ""
+string(0) ""
+string(0) ""
+string(0) ""