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Correctly handle celestial plane codepoints in ES5.1. (#3510)

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Fixes #3498.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2020-01-14 15:11:59 +01:00
committed by Dániel Bátyai
parent d6070a9fed
commit 0d7b461185
4 changed files with 34 additions and 7 deletions
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jerry-core/parser/js/js-lexer.c
+18 -6
View File
@@ -693,12 +693,12 @@ lexer_parse_identifier (parser_context_t *context_p, /**< context */
if (JERRY_UNLIKELY (code_point >= LIT_UTF8_2_BYTE_MARKER))
{
#if ENABLED (JERRY_ES2015)
utf8_length = lit_read_code_point_from_utf8 (source_p,
(lit_utf8_size_t) (source_end_p - source_p),
&code_point);
decoded_length = utf8_length;
#if ENABLED (JERRY_ES2015)
/* Only ES2015 supports code points outside of the basic plane which can be part of an identifier. */
if ((code_point >= LIT_UTF16_HIGH_SURROGATE_MIN && code_point <= LIT_UTF16_HIGH_SURROGATE_MAX)
&& source_p + 3 < source_end_p)
@@ -717,11 +717,23 @@ lexer_parse_identifier (parser_context_t *context_p, /**< context */
char_count = 2;
}
}
else if (source_p[0] >= LEXER_UTF8_4BYTE_START)
else if (source_p[0] >= LIT_UTF8_4_BYTE_MARKER)
{
decoded_length = 2 * 3;
has_escape = true;
}
#else /* !ENABLED (JERRY_ES2015) */
if (code_point < LIT_UTF8_4_BYTE_MARKER)
{
utf8_length = lit_read_code_point_from_utf8 (source_p,
(lit_utf8_size_t) (source_end_p - source_p),
&code_point);
decoded_length = utf8_length;
}
else
{
code_point = 0;
}
#endif /* ENABLED (JERRY_ES2015) */
}
@@ -1091,7 +1103,7 @@ lexer_parse_string (parser_context_t *context_p, /**< context */
}
#endif /* ENABLED (JERRY_ES2015) */
if (*source_p >= LEXER_UTF8_4BYTE_START)
if (*source_p >= LIT_UTF8_4_BYTE_MARKER)
{
/* Processing 4 byte unicode sequence (even if it is
* after a backslash). Always converted to two 3 byte
@@ -1893,7 +1905,7 @@ lexer_convert_ident_to_cesu8 (uint8_t *destination_p, /**< destination string */
}
#if ENABLED (JERRY_ES2015)
if (*source_p >= LEXER_UTF8_4BYTE_START)
if (*source_p >= LIT_UTF8_4_BYTE_MARKER)
{
lit_four_byte_utf8_char_to_cesu8 (destination_p, source_p);
@@ -2113,7 +2125,7 @@ lexer_convert_literal_to_chars (parser_context_t *context_p, /**< context */
}
#endif /* ENABLED (JERRY_ES2015) */
if (*source_p >= LEXER_UTF8_4BYTE_START)
if (*source_p >= LIT_UTF8_4_BYTE_MARKER)
{
/* Processing 4 byte unicode sequence (even if it is
* after a backslash). Always converted to two 3 byte
@@ -3028,7 +3040,7 @@ lexer_compare_identifier_to_chars (const uint8_t *left_p, /**< left identifier *
escape_size = lit_code_point_to_cesu8_bytes (utf8_buf, code_point);
}
else if (*left_p >= LEXER_UTF8_4BYTE_START)
else if (*left_p >= LIT_UTF8_4_BYTE_MARKER)
{
lit_four_byte_utf8_char_to_cesu8 (utf8_buf, left_p);
escape_size = 3 * 2;
jerry-core/parser/js/js-lexer.h
-1
View File
@@ -201,7 +201,6 @@ typedef enum
#define LEXER_NEWLINE_LS_PS_BYTE_1 0xe2
#define LEXER_NEWLINE_LS_PS_BYTE_23(source) \
((source)[1] == LIT_UTF8_2_BYTE_CODE_POINT_MIN && ((source)[2] | 0x1) == 0xa9)
#define LEXER_UTF8_4BYTE_START 0xf0
#define LEXER_IS_LEFT_BRACKET(type) \
((type) == LEXER_LEFT_BRACE || (type) == LEXER_LEFT_PAREN || (type) == LEXER_LEFT_SQUARE)