diff options
Diffstat (limited to 'parser/expat/lib/moz_extensions.c')
| -rw-r--r-- | parser/expat/lib/moz_extensions.c | 160 |
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 |