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Implement UnicodeEscape abstract method (#3959)

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Also refactored ecma_builtin_json_quote to use the method above

JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu
This commit is contained in:
Szilagyi Adam
2020-07-20 13:51:06 +02:00
committed by GitHub
parent b162e27418
commit 33359ac506
4 changed files with 66 additions and 22 deletions
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jerry-core/lit/lit-char-helpers.c
+20
View File
@@ -331,6 +331,26 @@ lit_char_is_binary_digit (ecma_char_t c) /** code unit */
} /* lit_char_is_binary_digit */
#endif /* ENABLED (JERRY_ESNEXT) */
/**
* UnicodeEscape abstract method
*
* See also: ECMA-262 v10, 24.5.2.3
*/
void
lit_char_unicode_escape (ecma_stringbuilder_t *builder_p, /**< stringbuilder to append */
ecma_char_t c) /**< code unit to convert */
{
ecma_stringbuilder_append_raw (builder_p, (lit_utf8_byte_t *) "\\u", 2);
for (int8_t i = 3; i >= 0; i--)
{
int32_t result_char = (c >> (i * 4)) & 0xF;
ecma_stringbuilder_append_byte (builder_p, (lit_utf8_byte_t) (result_char + (result_char <= 9
? LIT_CHAR_0
: (LIT_CHAR_LOWERCASE_A - 10))));
}
} /* lit_char_unicode_escape */
/**
* Convert a HexDigit character to its numeric value, as defined in ECMA-262 v5, 7.8.3
*
jerry-core/lit/lit-char-helpers.h
+1
View File
@@ -223,6 +223,7 @@ bool lit_char_is_hex_digit (ecma_char_t c);
#if ENABLED (JERRY_ESNEXT)
bool lit_char_is_binary_digit (ecma_char_t c);
#endif /* ENABLED (JERRY_ESNEXT) */
void lit_char_unicode_escape (ecma_stringbuilder_t *builder_p, ecma_char_t c);
uint32_t lit_char_hex_to_int (ecma_char_t c);
size_t lit_code_point_to_cesu8_bytes (uint8_t *dst_p, lit_code_point_t code_point);
size_t lit_code_point_get_cesu8_length (lit_code_point_t code_point);