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Implement BigInt literal parsing in the parser. (#4089)

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Support octal literals for BigInts.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2020-08-04 14:16:38 +02:00
committed by GitHub
parent be9dbeffdb
commit b5a96c9eca
16 changed files with 481 additions and 215 deletions
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jerry-core/parser/js/js-lexer.c
+98 -38
View File
@@ -14,6 +14,7 @@
*/
#include "ecma-alloc.h"
#include "ecma-bigint.h"
#include "ecma-helpers.h"
#include "ecma-function-object.h"
#include "ecma-literal-storage.h"
@@ -1303,6 +1304,9 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
const uint8_t *source_p = context_p->source_p;
const uint8_t *source_end_p = context_p->source_end_p;
bool can_be_float = false;
#if ENABLED (JERRY_BUILTIN_BIGINT)
bool can_be_bigint = true;
#endif /* ENABLED (JERRY_BUILTIN_BIGINT) */
size_t length;
context_p->token.type = LEXER_LITERAL;
@@ -1337,8 +1341,6 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
else if (LEXER_TO_ASCII_LOWERCASE (source_p[1]) == LIT_CHAR_LOWERCASE_O)
{
context_p->token.extra_value = LEXER_NUMBER_OCTAL;
context_p->token.lit_location.char_p++;
context_p->source_p++;
source_p += 2;
if (source_p >= source_end_p
@@ -1354,6 +1356,9 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
&& source_p[1] <= LIT_CHAR_7)
{
context_p->token.extra_value = LEXER_NUMBER_OCTAL;
#if ENABLED (JERRY_BUILTIN_BIGINT)
can_be_bigint = false;
#endif /* ENABLED (JERRY_BUILTIN_BIGINT) */
if (context_p->status_flags & PARSER_IS_STRICT)
{
@@ -1371,8 +1376,6 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
else if (LEXER_TO_ASCII_LOWERCASE (source_p[1]) == LIT_CHAR_LOWERCASE_B)
{
context_p->token.extra_value = LEXER_NUMBER_BINARY;
context_p->token.lit_location.char_p++;
context_p->source_p++;
source_p += 2;
if (source_p >= source_end_p
@@ -1413,6 +1416,10 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
&& source_p[0] == LIT_CHAR_DOT)
{
source_p++;
#if ENABLED (JERRY_BUILTIN_BIGINT)
can_be_bigint = false;
#endif /* ENABLED (JERRY_BUILTIN_BIGINT) */
while (source_p < source_end_p
&& source_p[0] >= LIT_CHAR_0
&& source_p[0] <= LIT_CHAR_9)
@@ -1425,6 +1432,9 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
&& LEXER_TO_ASCII_LOWERCASE (source_p[0]) == LIT_CHAR_LOWERCASE_E)
{
source_p++;
#if ENABLED (JERRY_BUILTIN_BIGINT)
can_be_bigint = false;
#endif /* ENABLED (JERRY_BUILTIN_BIGINT) */
if (source_p < source_end_p
&& (source_p[0] == LIT_CHAR_PLUS || source_p[0] == LIT_CHAR_MINUS))
@@ -1449,6 +1459,18 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
}
}
#if ENABLED (JERRY_BUILTIN_BIGINT)
if (source_p < source_end_p && source_p[0] == LIT_CHAR_LOWERCASE_N)
{
if (!can_be_bigint)
{
parser_raise_error (context_p, PARSER_ERR_INVALID_BIGINT);
}
context_p->token.extra_value = LEXER_NUMBER_BIGINT;
source_p++;
}
#endif /* ENABLED (JERRY_BUILTIN_BIGINT) */
length = (size_t) (source_p - context_p->source_p);
if (length > PARSER_MAXIMUM_IDENT_LENGTH)
{
@@ -2515,56 +2537,94 @@ lexer_construct_number_object (parser_context_t *context_p, /**< context */
{
parser_list_iterator_t literal_iterator;
lexer_literal_t *literal_p;
ecma_value_t lit_value;
ecma_number_t num;
uint32_t literal_index = 0;
prop_length_t length = context_p->token.lit_location.length;
if (context_p->token.extra_value < LEXER_NUMBER_OCTAL)
#if ENABLED (JERRY_BUILTIN_BIGINT)
if (JERRY_LIKELY (context_p->token.extra_value != LEXER_NUMBER_BIGINT))
{
num = ecma_utf8_string_to_number (context_p->token.lit_location.char_p,
length);
#endif /* ENABLED (JERRY_BUILTIN_BIGINT) */
if (context_p->token.extra_value < LEXER_NUMBER_OCTAL)
{
num = ecma_utf8_string_to_number (context_p->token.lit_location.char_p,
length);
}
else
{
const uint8_t *src_p = context_p->token.lit_location.char_p;
const uint8_t *src_end_p = src_p + length - 1;
ecma_number_t multiplier = 8.0;
JERRY_ASSERT (src_p[0] == LIT_CHAR_0);
#if ENABLED (JERRY_ESNEXT)
if (context_p->token.extra_value == LEXER_NUMBER_BINARY)
{
src_p++;
multiplier = 2.0;
}
else if (LEXER_TO_ASCII_LOWERCASE (src_p[1]) == LIT_CHAR_LOWERCASE_O)
{
src_p++;
}
#endif /* ENABLED (JERRY_ESNEXT) */
num = 0;
do
{
num = num * multiplier + (ecma_number_t) (*(++src_p) - LIT_CHAR_0);
}
while (src_p < src_end_p);
}
if (is_expr)
{
int32_t int_num = (int32_t) num;
if (int_num == num
&& int_num <= CBC_PUSH_NUMBER_BYTE_RANGE_END
&& (int_num != 0 || !is_negative_number))
{
context_p->lit_object.index = (uint16_t) int_num;
return true;
}
}
if (is_negative_number)
{
num = -num;
}
lit_value = ecma_find_or_create_literal_number (num);
#if ENABLED (JERRY_BUILTIN_BIGINT)
}
else
{
const uint8_t *src_p = context_p->token.lit_location.char_p;
const uint8_t *src_end_p = src_p + length - 1;
ecma_number_t multiplier = 8.0;
uint32_t options = ECMA_BIGINT_PARSE_DISALLOW_SYNTAX_ERROR | ECMA_BIGINT_PARSE_DISALLOW_MEMORY_ERROR;
#if ENABLED (JERRY_ESNEXT)
if (context_p->token.extra_value == LEXER_NUMBER_BINARY)
if (is_negative_number)
{
multiplier = 2.0;
options |= ECMA_BIGINT_PARSE_SET_NEGATIVE;
}
#endif /* ENABLED (JERRY_ESNEXT) */
num = 0;
do
JERRY_ASSERT (length >= 2);
lit_value = ecma_bigint_parse_string (context_p->token.lit_location.char_p,
(lit_utf8_size_t) (length - 1),
options);
JERRY_ASSERT (lit_value != ECMA_VALUE_FALSE && !ECMA_IS_VALUE_ERROR (lit_value));
if (lit_value == ECMA_VALUE_NULL)
{
src_p++;
num = num * multiplier + (ecma_number_t) (*src_p - LIT_CHAR_0);
parser_raise_error (context_p, PARSER_ERR_OUT_OF_MEMORY);
}
while (src_p < src_end_p);
lit_value = ecma_find_or_create_literal_bigint (lit_value);
}
#endif /* ENABLED (JERRY_BUILTIN_BIGINT) */
if (is_expr)
{
int32_t int_num = (int32_t) num;
if (int_num == num
&& int_num <= CBC_PUSH_NUMBER_BYTE_RANGE_END
&& (int_num != 0 || !is_negative_number))
{
context_p->lit_object.index = (uint16_t) int_num;
return true;
}
}
if (is_negative_number)
{
num = -num;
}
ecma_value_t lit_value = ecma_find_or_create_literal_number (num);
parser_list_iterator_init (&context_p->literal_pool, &literal_iterator);
while ((literal_p = (lexer_literal_t *) parser_list_iterator_next (&literal_iterator)) != NULL)