From: Alex Dowad <alexinbeijing@gmail.com>
Date: Sun, 6 Sep 2020 11:13:37 +0000 (+0200)
Subject: Add identify filter for UCS-2, UCS-2BE, and UCS-2LE encodings
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=648c1cb51e1b06171e625f1b2dd812b6227b1b2b;p=php

Add identify filter for UCS-2, UCS-2BE, and UCS-2LE encodings
---

diff --git a/ext/mbstring/libmbfl/filters/mbfilter_ucs2.c b/ext/mbstring/libmbfl/filters/mbfilter_ucs2.c
index 9df11cb1d0..258c564aae 100644
--- a/ext/mbstring/libmbfl/filters/mbfilter_ucs2.c
+++ b/ext/mbstring/libmbfl/filters/mbfilter_ucs2.c
@@ -30,6 +30,8 @@
 #include "mbfilter.h"
 #include "mbfilter_ucs2.h"
 
+static int mbfl_filt_ident_ucs2(int c, mbfl_identify_filter *filter);
+
 static const char *mbfl_encoding_ucs2_aliases[] = {"ISO-10646-UCS-2", "UCS2" , "UNICODE", NULL};
 
 const mbfl_encoding mbfl_encoding_ucs2 = {
@@ -65,6 +67,24 @@ const mbfl_encoding mbfl_encoding_ucs2le = {
 	&vtbl_wchar_ucs2le
 };
 
+const struct mbfl_identify_vtbl vtbl_identify_ucs2 = {
+	mbfl_no_encoding_ucs2,
+	mbfl_filt_ident_common_ctor,
+	mbfl_filt_ident_ucs2
+};
+
+const struct mbfl_identify_vtbl vtbl_identify_ucs2be = {
+	mbfl_no_encoding_ucs2be,
+	mbfl_filt_ident_common_ctor,
+	mbfl_filt_ident_ucs2
+};
+
+const struct mbfl_identify_vtbl vtbl_identify_ucs2le = {
+	mbfl_no_encoding_ucs2le,
+	mbfl_filt_ident_common_ctor,
+	mbfl_filt_ident_ucs2
+};
+
 const struct mbfl_convert_vtbl vtbl_ucs2_wchar = {
 	mbfl_no_encoding_ucs2,
 	mbfl_no_encoding_wchar,
@@ -237,3 +257,10 @@ int mbfl_filt_conv_wchar_ucs2le(int c, mbfl_convert_filter *filter)
 
 	return c;
 }
+
+static int mbfl_filt_ident_ucs2(int c, mbfl_identify_filter *filter)
+{
+	/* Input string must be a multiple of 2 bytes */
+	filter->status = (filter->status + 1) % 2;
+	return c;
+}
diff --git a/ext/mbstring/libmbfl/filters/mbfilter_ucs2.h b/ext/mbstring/libmbfl/filters/mbfilter_ucs2.h
index bbf567a493..f6d9b8b772 100644
--- a/ext/mbstring/libmbfl/filters/mbfilter_ucs2.h
+++ b/ext/mbstring/libmbfl/filters/mbfilter_ucs2.h
@@ -35,6 +35,9 @@
 extern const mbfl_encoding mbfl_encoding_ucs2;
 extern const mbfl_encoding mbfl_encoding_ucs2be;
 extern const mbfl_encoding mbfl_encoding_ucs2le;
+extern const struct mbfl_identify_vtbl vtbl_identify_ucs2;
+extern const struct mbfl_identify_vtbl vtbl_identify_ucs2be;
+extern const struct mbfl_identify_vtbl vtbl_identify_ucs2le;
 extern const struct mbfl_convert_vtbl vtbl_ucs2_wchar;
 extern const struct mbfl_convert_vtbl vtbl_wchar_ucs2;
 extern const struct mbfl_convert_vtbl vtbl_ucs2be_wchar;
diff --git a/ext/mbstring/libmbfl/mbfl/mbfl_ident.c b/ext/mbstring/libmbfl/mbfl/mbfl_ident.c
index e6163d538c..a92d55daa3 100644
--- a/ext/mbstring/libmbfl/mbfl/mbfl_ident.c
+++ b/ext/mbstring/libmbfl/mbfl/mbfl_ident.c
@@ -164,6 +164,9 @@ static const struct mbfl_identify_vtbl *mbfl_identify_filter_list[] = {
 	&vtbl_identify_utf16le,
 	&vtbl_identify_utf16be,
 	&vtbl_identify_8bit,
+	&vtbl_identify_ucs2,
+	&vtbl_identify_ucs2be,
+	&vtbl_identify_ucs2le,
 	&vtbl_identify_false,
 	NULL
 };