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-rw-r--r--parser/expat/lib/moz_extensions.c160
1 files changed, 160 insertions, 0 deletions
diff --git a/parser/expat/lib/moz_extensions.c b/parser/expat/lib/moz_extensions.c
new file mode 100644
index 0000000000..37b9e7f71e
--- /dev/null
+++ b/parser/expat/lib/moz_extensions.c
@@ -0,0 +1,160 @@
+/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifdef IS_LITTLE_ENDIAN
+
+#define PREFIX(ident) little2_ ## ident
+#define BYTE_TYPE(p) LITTLE2_BYTE_TYPE(XmlGetUtf16InternalEncodingNS(), p)
+#define IS_NAME_CHAR_MINBPC(p) LITTLE2_IS_NAME_CHAR_MINBPC(0, p)
+#define IS_NMSTRT_CHAR_MINBPC(p) LITTLE2_IS_NMSTRT_CHAR_MINBPC(0, p)
+
+#else
+
+#define PREFIX(ident) big2_ ## ident
+#define BYTE_TYPE(p) BIG2_BYTE_TYPE(XmlGetUtf16InternalEncodingNS(), p)
+#define IS_NAME_CHAR_MINBPC(p) BIG2_IS_NAME_CHAR_MINBPC(0, p)
+#define IS_NMSTRT_CHAR_MINBPC(p) BIG2_IS_NMSTRT_CHAR_MINBPC(0, p)
+
+#endif
+
+#define MOZ_EXPAT_VALID_QNAME (0)
+#define MOZ_EXPAT_EMPTY_QNAME (1 << 0)
+#define MOZ_EXPAT_INVALID_CHARACTER (1 << 1)
+#define MOZ_EXPAT_MALFORMED (1 << 2)
+
+int MOZ_XMLCheckQName(const char* ptr, const char* end, int ns_aware,
+ const char** colon)
+{
+ int result = MOZ_EXPAT_VALID_QNAME;
+ int nmstrt = 1;
+ *colon = 0;
+ if (ptr == end) {
+ return MOZ_EXPAT_EMPTY_QNAME;
+ }
+ do {
+ switch (BYTE_TYPE(ptr)) {
+ case BT_COLON:
+ /* We're namespace-aware and either first or last character is a colon
+ or we've already seen a colon. */
+ if (ns_aware && (nmstrt || *colon || ptr + 2 == end)) {
+ return MOZ_EXPAT_MALFORMED;
+ }
+ *colon = ptr;
+ nmstrt = ns_aware; /* e.g. "a:0" should be valid if !ns_aware */
+ break;
+ case BT_NONASCII:
+ if (!IS_NAME_CHAR_MINBPC(ptr) ||
+ (nmstrt && !*colon && !IS_NMSTRT_CHAR_MINBPC(ptr))) {
+ return MOZ_EXPAT_INVALID_CHARACTER;
+ }
+ if (nmstrt && *colon && !IS_NMSTRT_CHAR_MINBPC(ptr)) {
+ /* If a non-starting character like a number is right after the colon,
+ this is a namespace error, not invalid character */
+ return MOZ_EXPAT_MALFORMED;
+ }
+ nmstrt = 0;
+ break;
+ case BT_NMSTRT:
+ case BT_HEX:
+ nmstrt = 0;
+ break;
+ case BT_DIGIT:
+ case BT_NAME:
+ case BT_MINUS:
+ if (nmstrt) {
+ return MOZ_EXPAT_INVALID_CHARACTER;
+ }
+ break;
+ default:
+ return MOZ_EXPAT_INVALID_CHARACTER;
+ }
+ ptr += 2;
+ } while (ptr != end);
+ return result;
+}
+
+int MOZ_XMLIsLetter(const char* ptr)
+{
+ switch (BYTE_TYPE(ptr)) {
+ case BT_NONASCII:
+ if (!IS_NMSTRT_CHAR_MINBPC(ptr)) {
+ return 0;
+ }
+ /* fall through */
+ case BT_NMSTRT:
+ case BT_HEX:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+int MOZ_XMLIsNCNameChar(const char* ptr)
+{
+ switch (BYTE_TYPE(ptr)) {
+ case BT_NONASCII:
+ if (!IS_NAME_CHAR_MINBPC(ptr)) {
+ return 0;
+ }
+ /* fall through */
+ case BT_NMSTRT:
+ case BT_HEX:
+ case BT_DIGIT:
+ case BT_NAME:
+ case BT_MINUS:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+int MOZ_XMLTranslateEntity(const char* ptr, const char* end, const char** next,
+ XML_Char* result)
+{
+ // Can we assert here somehow?
+ // MOZ_ASSERT(*ptr == '&');
+
+ const ENCODING* enc = XmlGetUtf16InternalEncodingNS();
+ /* scanRef expects to be pointed to the char after the '&'. */
+ int tok = PREFIX(scanRef)(enc, ptr + enc->minBytesPerChar, end, next);
+ if (tok <= XML_TOK_INVALID) {
+ return 0;
+ }
+
+ if (tok == XML_TOK_CHAR_REF) {
+ /* XmlCharRefNumber expects to be pointed to the '&'. */
+ int n = XmlCharRefNumber(enc, ptr);
+
+ /* We could get away with just < 0, but better safe than sorry. */
+ if (n <= 0) {
+ return 0;
+ }
+
+ return XmlUtf16Encode(n, (unsigned short*)result);
+ }
+
+ if (tok == XML_TOK_ENTITY_REF) {
+ /* XmlPredefinedEntityName expects to be pointed to the char after '&'.
+
+ *next points to after the semicolon, so the entity ends at
+ *next - enc->minBytesPerChar. */
+ XML_Char ch =
+ (XML_Char)XmlPredefinedEntityName(enc, ptr + enc->minBytesPerChar,
+ *next - enc->minBytesPerChar);
+ if (!ch) {
+ return 0;
+ }
+
+ *result = ch;
+ return 1;
+ }
+
+ return 0;
+}
+
+#undef PREFIX
+#undef BYTE_TYPE
+#undef IS_NAME_CHAR_MINBPC
+#undef IS_NMSTRT_CHAR_MINBPC