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Implement EscapeRegExpPattern method (#3543)

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the algorithm is based on ECMA-262 v6, 21.2.3.2.4

JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu
This commit is contained in:
Szilagyi Adam
2020-02-18 09:49:54 +01:00
committed by GitHub
parent fda02d4b2a
commit 181570ff41
2 changed files with 110 additions and 2 deletions
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jerry-core/ecma/builtin-objects/ecma-builtin-regexp-prototype.c
+70 -2
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@@ -137,6 +137,75 @@ ecma_builtin_regexp_prototype_get_flags (ecma_value_t this_arg) /**< this argume
return ecma_make_string_value (ecma_stringbuilder_finalize (&builder));
} /* ecma_builtin_regexp_prototype_get_flags */
/**
* The EscapeRegExpPattern method.
*
* See also:
* ECMA-262 v6, 21.2.3.2.4
*
* @return ecma_value_t
*/
static ecma_value_t
ecma_op_escape_regexp_pattern (ecma_string_t *pattern_str_p) /**< RegExp pattern */
{
ecma_stringbuilder_t builder = ecma_stringbuilder_create ();
ECMA_STRING_TO_UTF8_STRING (pattern_str_p, pattern_start_p, pattern_start_size);
const lit_utf8_byte_t *pattern_str_curr_p = pattern_start_p;
const lit_utf8_byte_t *pattern_str_end_p = pattern_start_p + pattern_start_size;
while (pattern_str_curr_p < pattern_str_end_p)
{
ecma_char_t c = lit_cesu8_read_next (&pattern_str_curr_p);
switch (c)
{
case LIT_CHAR_SLASH:
{
ecma_stringbuilder_append_raw (&builder, (const lit_utf8_byte_t *) "\\/", 2);
break;
}
case LIT_CHAR_LF:
{
ecma_stringbuilder_append_raw (&builder, (const lit_utf8_byte_t *) "\\n", 2);
break;
}
case LIT_CHAR_CR:
{
ecma_stringbuilder_append_raw (&builder, (const lit_utf8_byte_t *) "\\r", 2);
break;
}
case LIT_CHAR_LS:
{
ecma_stringbuilder_append_raw (&builder, (const lit_utf8_byte_t *) "\\u2028", 6);
break;
}
case LIT_CHAR_PS:
{
ecma_stringbuilder_append_raw (&builder, (const lit_utf8_byte_t *) "\\u2029", 6);
break;
}
case LIT_CHAR_BACKSLASH:
{
JERRY_ASSERT (pattern_str_curr_p < pattern_str_end_p);
ecma_stringbuilder_append_char (&builder, LIT_CHAR_BACKSLASH);
ecma_stringbuilder_append_char (&builder, lit_cesu8_read_next (&pattern_str_curr_p));
break;
}
default:
{
ecma_stringbuilder_append_char (&builder, c);
break;
}
}
}
ECMA_FINALIZE_UTF8_STRING (pattern_start_p, pattern_start_size);
return ecma_make_string_value (ecma_stringbuilder_finalize (&builder));
} /* ecma_op_escape_regexp_pattern */
/**
* The RegExp.prototype object's 'source' accessor property
*
@@ -162,8 +231,7 @@ ecma_builtin_regexp_prototype_get_source (ecma_value_t this_arg) /**< this argum
if (bc_p != NULL)
{
ecma_ref_ecma_string (ecma_get_string_from_value (bc_p->source));
return bc_p->source;
return ecma_op_escape_regexp_pattern (ecma_get_string_from_value (bc_p->source));
}
return ecma_make_string_value (ecma_get_magic_string (LIT_MAGIC_STRING_EMPTY_NON_CAPTURE_GROUP));