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jerryscript/jerry-core/ecma/base/ecma-helpers-string.c
Tóth Béla 09c8d28b2c
Implement TrimStart TrimEnd and aliases (#4102) 
Based on: https://tc39.es/ecma262/#sec-string.prototype.trim

JerryScript-DCO-1.0-Signed-off-by: Bela Toth tbela@inf.u-szeged.hu
2020-08-25 13:10:36 +02:00

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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ecma-alloc.h"
#include "ecma-conversion.h"
#include "ecma-exceptions.h"
#include "ecma-gc.h"
#include "ecma-globals.h"
#include "ecma-helpers.h"
#include "jrt.h"
#include "jrt-libc-includes.h"
#include "lit-char-helpers.h"
#include "lit-magic-strings.h"
/** \addtogroup ecma ECMA
* @{
*
* \addtogroup ecmahelpers Helpers for operations with ECMA data types
* @{
*/
JERRY_STATIC_ASSERT (ECMA_STRING_CONTAINER_MASK >= ECMA_STRING_CONTAINER__MAX,
ecma_string_container_types_must_be_lower_than_the_container_mask);
JERRY_STATIC_ASSERT ((ECMA_STRING_MAX_REF | ECMA_STRING_CONTAINER_MASK | ECMA_STATIC_STRING_FLAG) == UINT32_MAX,
ecma_string_ref_and_container_fields_should_fill_the_32_bit_field);
JERRY_STATIC_ASSERT (ECMA_STRING_NOT_ARRAY_INDEX == UINT32_MAX,
ecma_string_not_array_index_must_be_equal_to_uint32_max);
JERRY_STATIC_ASSERT ((ECMA_TYPE_DIRECT_STRING & 0x1) != 0,
ecma_type_direct_string_must_be_odd_number);
JERRY_STATIC_ASSERT (LIT_MAGIC_STRING__COUNT <= ECMA_DIRECT_STRING_MAX_IMM,
all_magic_strings_must_be_encoded_as_direct_string);
JERRY_STATIC_ASSERT ((int) ECMA_DIRECT_STRING_UINT == (int) ECMA_STRING_CONTAINER_UINT32_IN_DESC,
ecma_direct_and_container_types_must_match);
JERRY_STATIC_ASSERT (ECMA_PROPERTY_NAME_TYPE_SHIFT > ECMA_VALUE_SHIFT,
ecma_property_name_type_shift_must_be_greater_than_ecma_value_shift);
JERRY_STATIC_ASSERT (sizeof (ecma_stringbuilder_header_t) <= ECMA_ASCII_STRING_HEADER_SIZE,
ecma_stringbuilder_header_must_not_be_larger_than_ecma_ascii_string);
/**
* Convert a string to an unsigned 32 bit value if possible
*
* @return true if the conversion is successful
* false otherwise
*/
static bool
ecma_string_to_array_index (const lit_utf8_byte_t *string_p, /**< utf-8 string */
lit_utf8_size_t string_size, /**< string size */
uint32_t *result_p) /**< [out] converted value */
{
JERRY_ASSERT (string_size > 0 && *string_p >= LIT_CHAR_0 && *string_p <= LIT_CHAR_9);
if (*string_p == LIT_CHAR_0)
{
*result_p = 0;
return (string_size == 1);
}
if (string_size > ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32)
{
return false;
}
uint32_t index = 0;
const lit_utf8_byte_t *string_end_p = string_p + string_size;
if (string_size == ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32)
{
string_end_p--;
}
do
{
if (*string_p > LIT_CHAR_9 || *string_p < LIT_CHAR_0)
{
return false;
}
index = (index * 10) + (uint32_t) (*string_p++ - LIT_CHAR_0);
}
while (string_p < string_end_p);
if (string_size < ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32)
{
*result_p = index;
return true;
}
/* Overflow must be checked as well when size is
* equal to ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32. */
if (*string_p > LIT_CHAR_9
|| *string_p < LIT_CHAR_0
|| index > (UINT32_MAX / 10)
|| (index == (UINT32_MAX / 10) && *string_p > LIT_CHAR_5))
{
return false;
}
*result_p = (index * 10) + (uint32_t) (*string_p - LIT_CHAR_0);
return true;
} /* ecma_string_to_array_index */
/**
* Returns the characters and size of a string.
*
* Note:
* UINT type is not supported
*
* @return byte array start - if the byte array of a string is available
* NULL - otherwise
*/
static const lit_utf8_byte_t *
ecma_string_get_chars_fast (const ecma_string_t *string_p, /**< ecma-string */
lit_utf8_size_t *size_p) /**< [out] size of the ecma string */
{
if (ECMA_IS_DIRECT_STRING (string_p))
{
if (ECMA_GET_DIRECT_STRING_TYPE (string_p) == ECMA_DIRECT_STRING_MAGIC)
{
uint32_t id = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
if (id >= LIT_MAGIC_STRING__COUNT)
{
id -= LIT_MAGIC_STRING__COUNT;
*size_p = lit_get_magic_string_ex_size (id);
return lit_get_magic_string_ex_utf8 (id);
}
*size_p = lit_get_magic_string_size (id);
return lit_get_magic_string_utf8 (id);
}
}
JERRY_ASSERT (string_p->refs_and_container >= ECMA_STRING_REF_ONE);
switch (ECMA_STRING_GET_CONTAINER (string_p))
{
case ECMA_STRING_CONTAINER_HEAP_UTF8_STRING:
{
*size_p = ((ecma_short_string_t *) string_p)->size;
return ECMA_SHORT_STRING_GET_BUFFER (string_p);
}
case ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING:
{
ecma_long_string_t *long_string_p = (ecma_long_string_t *) string_p;
*size_p = long_string_p->size;
return long_string_p->string_p;
}
case ECMA_STRING_CONTAINER_HEAP_ASCII_STRING:
{
*size_p = ECMA_ASCII_STRING_GET_SIZE (string_p);
return ECMA_ASCII_STRING_GET_BUFFER (string_p);
}
default:
{
JERRY_ASSERT (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_MAGIC_STRING_EX);
lit_magic_string_ex_id_t id = LIT_MAGIC_STRING__COUNT - string_p->u.magic_string_ex_id;
*size_p = lit_get_magic_string_ex_size (id);
return lit_get_magic_string_ex_utf8 (id);
}
}
} /* ecma_string_get_chars_fast */
/**
* Allocate new ecma-string and fill it with reference to ECMA magic string
*
* @return pointer to ecma-string descriptor
*/
static ecma_string_t *
ecma_new_ecma_string_from_magic_string_ex_id (lit_magic_string_ex_id_t id) /**< identifier of externl magic string */
{
JERRY_ASSERT (id < lit_get_magic_string_ex_count ());
uintptr_t string_id = (uintptr_t) (id + LIT_MAGIC_STRING__COUNT);
if (JERRY_LIKELY (string_id <= ECMA_DIRECT_STRING_MAX_IMM))
{
return (ecma_string_t *) ECMA_CREATE_DIRECT_STRING (ECMA_DIRECT_STRING_MAGIC, string_id);
}
ecma_string_t *string_desc_p = ecma_alloc_string ();
string_desc_p->refs_and_container = ECMA_STRING_CONTAINER_MAGIC_STRING_EX | ECMA_STRING_REF_ONE;
string_desc_p->u.magic_string_ex_id = id + LIT_MAGIC_STRING__COUNT;
return string_desc_p;
} /* ecma_new_ecma_string_from_magic_string_ex_id */
#if ENABLED (JERRY_ESNEXT)
/**
* Allocate new ecma-string and fill it with reference to the symbol descriptor
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_symbol_from_descriptor_string (ecma_value_t string_desc) /**< ecma-string */
{
JERRY_ASSERT (!ecma_is_value_symbol (string_desc));
ecma_extended_string_t *symbol_p = ecma_alloc_extended_string ();
symbol_p->header.refs_and_container = ECMA_STRING_REF_ONE | ECMA_STRING_CONTAINER_SYMBOL;
symbol_p->u.symbol_descriptor = string_desc;
symbol_p->header.u.hash = (lit_string_hash_t) (((uintptr_t) symbol_p) >> ECMA_SYMBOL_HASH_SHIFT);
JERRY_ASSERT ((symbol_p->header.u.hash & ECMA_GLOBAL_SYMBOL_FLAG) == 0);
return (ecma_string_t *) symbol_p;
} /* ecma_new_symbol_from_descriptor_string */
/**
* Check whether an ecma-string contains an ecma-symbol
*
* @return true - if the ecma-string contains an ecma-symbol
* false - otherwise
*/
bool
ecma_prop_name_is_symbol (ecma_string_t *string_p) /**< ecma-string */
{
JERRY_ASSERT (string_p != NULL);
return (!ECMA_IS_DIRECT_STRING (string_p)
&& ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_SYMBOL);
} /* ecma_prop_name_is_symbol */
#endif /* ENABLED (JERRY_ESNEXT) */
/**
* Allocate new UTF8 ecma-string and fill it with characters from the given utf8 buffer
*
* @return pointer to ecma-string descriptor
*/
static inline ecma_string_t * JERRY_ATTR_ALWAYS_INLINE
ecma_new_ecma_string_from_utf8_buffer (lit_utf8_size_t length, /**< length of the buffer */
lit_utf8_size_t size, /**< size of the buffer */
lit_utf8_byte_t **data_p) /**< [out] pointer to the start of the string buffer */
{
if (JERRY_LIKELY (size <= UINT16_MAX))
{
if (JERRY_LIKELY (length == size) && size <= (UINT8_MAX + 1))
{
ecma_string_t *string_desc_p;
string_desc_p = (ecma_string_t *) ecma_alloc_string_buffer (size + ECMA_ASCII_STRING_HEADER_SIZE);
string_desc_p->refs_and_container = ECMA_STRING_CONTAINER_HEAP_ASCII_STRING | ECMA_STRING_REF_ONE;
ECMA_ASCII_STRING_SET_SIZE (string_desc_p, size);
*data_p = ECMA_ASCII_STRING_GET_BUFFER (string_desc_p);
return (ecma_string_t *) string_desc_p;
}
ecma_short_string_t *string_desc_p;
string_desc_p = (ecma_short_string_t *) ecma_alloc_string_buffer (size + sizeof (ecma_short_string_t));
string_desc_p->header.refs_and_container = ECMA_STRING_CONTAINER_HEAP_UTF8_STRING | ECMA_STRING_REF_ONE;
string_desc_p->size = (uint16_t) size;
string_desc_p->length = (uint16_t) length;
*data_p = ECMA_SHORT_STRING_GET_BUFFER (string_desc_p);
return (ecma_string_t *) string_desc_p;
}
ecma_long_string_t *long_string_p;
long_string_p = (ecma_long_string_t *) ecma_alloc_string_buffer (size + sizeof (ecma_long_string_t));
long_string_p->header.refs_and_container = ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING | ECMA_STRING_REF_ONE;
long_string_p->string_p = ECMA_LONG_STRING_BUFFER_START (long_string_p);
long_string_p->size = size;
long_string_p->length = length;
*data_p = ECMA_LONG_STRING_BUFFER_START (long_string_p);
return (ecma_string_t *) long_string_p;
} /* ecma_new_ecma_string_from_utf8_buffer */
/**
* Checks whether a string has a special representation, that is, the string is either a magic string,
* an external magic string, or an uint32 number, and creates an ecma string using the special representation,
* if available.
*
* @return pointer to ecma string with the special representation
* NULL, if there is no special representation for the string
*/
static ecma_string_t *
ecma_find_special_string (const lit_utf8_byte_t *string_p, /**< utf8 string */
lit_utf8_size_t string_size) /**< string size */
{
JERRY_ASSERT (string_p != NULL || string_size == 0);
lit_magic_string_id_t magic_string_id = lit_is_utf8_string_magic (string_p, string_size);
if (magic_string_id != LIT_MAGIC_STRING__COUNT)
{
return ecma_get_magic_string (magic_string_id);
}
JERRY_ASSERT (string_size > 0);
if (*string_p >= LIT_CHAR_0 && *string_p <= LIT_CHAR_9)
{
uint32_t array_index;
if (ecma_string_to_array_index (string_p, string_size, &array_index))
{
return ecma_new_ecma_string_from_uint32 (array_index);
}
}
if (lit_get_magic_string_ex_count () > 0)
{
lit_magic_string_ex_id_t magic_string_ex_id = lit_is_ex_utf8_string_magic (string_p, string_size);
if (magic_string_ex_id < lit_get_magic_string_ex_count ())
{
return ecma_new_ecma_string_from_magic_string_ex_id (magic_string_ex_id);
}
}
return NULL;
} /* ecma_find_special_string */
/**
* Allocate new ecma-string and fill it with characters from the utf8 string
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_ecma_string_from_utf8 (const lit_utf8_byte_t *string_p, /**< utf-8 string */
lit_utf8_size_t string_size) /**< string size */
{
JERRY_ASSERT (string_p != NULL || string_size == 0);
JERRY_ASSERT (lit_is_valid_cesu8_string (string_p, string_size));
ecma_string_t *string_desc_p = ecma_find_special_string (string_p, string_size);
if (string_desc_p != NULL)
{
return string_desc_p;
}
lit_utf8_byte_t *data_p;
string_desc_p = ecma_new_ecma_string_from_utf8_buffer (lit_utf8_string_length (string_p, string_size),
string_size,
&data_p);
string_desc_p->u.hash = lit_utf8_string_calc_hash (string_p, string_size);
memcpy (data_p, string_p, string_size);
return string_desc_p;
} /* ecma_new_ecma_string_from_utf8 */
/**
* Allocate a new ecma-string and initialize it from the utf8 string argument.
* All 4-bytes long unicode sequences are converted into two 3-bytes long sequences.
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_ecma_string_from_utf8_converted_to_cesu8 (const lit_utf8_byte_t *string_p, /**< utf-8 string */
lit_utf8_size_t string_size) /**< utf-8 string size */
{
JERRY_ASSERT (string_p != NULL || string_size == 0);
lit_utf8_size_t converted_string_length = 0;
lit_utf8_size_t converted_string_size = 0;
lit_utf8_size_t pos = 0;
/* Calculate the required length and size information of the converted cesu-8 encoded string */
while (pos < string_size)
{
if ((string_p[pos] & LIT_UTF8_1_BYTE_MASK) == LIT_UTF8_1_BYTE_MARKER)
{
pos++;
}
else if ((string_p[pos] & LIT_UTF8_2_BYTE_MASK) == LIT_UTF8_2_BYTE_MARKER)
{
pos += 2;
}
else if ((string_p[pos] & LIT_UTF8_3_BYTE_MASK) == LIT_UTF8_3_BYTE_MARKER)
{
pos += 3;
}
else
{
JERRY_ASSERT ((string_p[pos] & LIT_UTF8_4_BYTE_MASK) == LIT_UTF8_4_BYTE_MARKER);
pos += 4;
converted_string_size += 2;
converted_string_length++;
}
converted_string_length++;
}
JERRY_ASSERT (pos == string_size);
if (converted_string_size == 0)
{
return ecma_new_ecma_string_from_utf8 (string_p, string_size);
}
converted_string_size += string_size;
JERRY_ASSERT (lit_is_valid_utf8_string (string_p, string_size));
lit_utf8_byte_t *data_p;
ecma_string_t *string_desc_p = ecma_new_ecma_string_from_utf8_buffer (converted_string_length,
converted_string_size,
&data_p);
const lit_utf8_byte_t *const begin_data_p = data_p;
pos = 0;
while (pos < string_size)
{
if ((string_p[pos] & LIT_UTF8_4_BYTE_MASK) == LIT_UTF8_4_BYTE_MARKER)
{
/* Processing 4 byte unicode sequence. Always converted to two 3 byte long sequence. */
lit_four_byte_utf8_char_to_cesu8 (data_p, string_p + pos);
data_p += 3 * 2;
pos += 4;
}
else
{
*data_p++ = string_p[pos++];
}
}
JERRY_ASSERT (pos == string_size);
string_desc_p->u.hash = lit_utf8_string_calc_hash (begin_data_p, converted_string_size);
return (ecma_string_t *) string_desc_p;
} /* ecma_new_ecma_string_from_utf8_converted_to_cesu8 */
/**
* Allocate new ecma-external-string and fill it with characters from the cesu8 string
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_ecma_external_string_from_cesu8 (const lit_utf8_byte_t *string_p, /**< cesu-8 string */
lit_utf8_size_t string_size, /**< string size */
ecma_object_native_free_callback_t free_cb) /**< free callback */
{
JERRY_ASSERT (string_p != NULL || string_size == 0);
JERRY_ASSERT (lit_is_valid_cesu8_string (string_p, string_size));
if (string_size < (sizeof (ecma_external_string_t) - sizeof (ecma_short_string_t)))
{
/* Normal strings are created for short strings. */
ecma_string_t *string_desc_p = ecma_new_ecma_string_from_utf8 (string_p, string_size);
if (free_cb != NULL)
{
free_cb ((void *) string_p);
}
return string_desc_p;
}
ecma_string_t *string_desc_p = ecma_find_special_string (string_p, string_size);
if (string_desc_p != NULL)
{
if (free_cb != NULL)
{
free_cb ((void *) string_p);
}
return string_desc_p;
}
ecma_external_string_t *external_string_p = ecma_alloc_external_string ();
ecma_long_string_t *long_string_p = (ecma_long_string_t *) external_string_p;
long_string_p->header.refs_and_container = ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING | ECMA_STRING_REF_ONE;
long_string_p->header.u.hash = lit_utf8_string_calc_hash (string_p, string_size);
long_string_p->string_p = string_p;
long_string_p->size = string_size;
long_string_p->length = lit_utf8_string_length (string_p, string_size);
external_string_p->free_cb = free_cb;
return (ecma_string_t *) external_string_p;
} /* ecma_new_ecma_external_string_from_cesu8 */
/**
* Allocate new ecma-string and fill it with cesu-8 character which represents specified code unit
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_ecma_string_from_code_unit (ecma_char_t code_unit) /**< code unit */
{
lit_utf8_byte_t lit_utf8_bytes[LIT_UTF8_MAX_BYTES_IN_CODE_UNIT];
lit_utf8_size_t bytes_size = lit_code_unit_to_utf8 (code_unit, lit_utf8_bytes);
return ecma_new_ecma_string_from_utf8 (lit_utf8_bytes, bytes_size);
} /* ecma_new_ecma_string_from_code_unit */
#if ENABLED (JERRY_ESNEXT)
/**
* Allocate new ecma-string and fill it with cesu-8 character which represents specified code units
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_ecma_string_from_code_units (ecma_char_t first_code_unit, /**< code unit */
ecma_char_t second_code_unit) /**< code unit */
{
lit_utf8_byte_t lit_utf8_bytes[2 * LIT_UTF8_MAX_BYTES_IN_CODE_UNIT];
lit_utf8_size_t bytes_size = lit_code_unit_to_utf8 (first_code_unit, lit_utf8_bytes);
bytes_size += lit_code_unit_to_utf8 (second_code_unit, lit_utf8_bytes + bytes_size);
return ecma_new_ecma_string_from_utf8 (lit_utf8_bytes, bytes_size);
} /* ecma_new_ecma_string_from_code_units */
#endif /* ENABLED (JERRY_ESNEXT) */
/**
* Allocate new ecma-string and fill it with ecma-number
*
* Note: the number cannot be represented as direct string
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_non_direct_string_from_uint32 (uint32_t uint32_number) /**< uint32 value of the string */
{
JERRY_ASSERT (uint32_number > ECMA_DIRECT_STRING_MAX_IMM);
ecma_string_t *string_p = ecma_alloc_string ();
string_p->refs_and_container = ECMA_STRING_CONTAINER_UINT32_IN_DESC | ECMA_STRING_REF_ONE;
string_p->u.uint32_number = uint32_number;
return string_p;
} /* ecma_new_non_direct_string_from_uint32 */
/**
* Allocate new ecma-string and fill it with property length number
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_ecma_string_from_length (ecma_length_t number) /**< property length */
{
if (JERRY_LIKELY (number <= ECMA_DIRECT_STRING_MAX_IMM))
{
return (ecma_string_t *) ECMA_CREATE_DIRECT_STRING (ECMA_DIRECT_STRING_UINT, (uintptr_t) number);
}
#if ENABLED (JERRY_ESNEXT)
JERRY_ASSERT (number <= ECMA_NUMBER_MAX_SAFE_INTEGER);
if (JERRY_UNLIKELY (number > UINT32_MAX))
{
return ecma_new_ecma_string_from_number ((ecma_number_t) number);
}
#endif /* ENABLED (JERRY_ESNEXT) */
return ecma_new_non_direct_string_from_uint32 ((uint32_t) number);
} /* ecma_new_ecma_string_from_length */
/**
* Allocate new ecma-string and fill it with uint32 number
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_ecma_string_from_uint32 (uint32_t uint32_number) /**< uint32 value of the string */
{
if (JERRY_LIKELY (uint32_number <= ECMA_DIRECT_STRING_MAX_IMM))
{
return (ecma_string_t *) ECMA_CREATE_DIRECT_STRING (ECMA_DIRECT_STRING_UINT, (uintptr_t) uint32_number);
}
return ecma_new_non_direct_string_from_uint32 (uint32_number);
} /* ecma_new_ecma_string_from_uint32 */
/**
* Returns the constant assigned to the uint32 number.
*
* Note:
* Calling ecma_deref_ecma_string on the returned pointer is optional.
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_get_ecma_string_from_uint32 (uint32_t uint32_number) /**< input number */
{
JERRY_ASSERT (uint32_number <= ECMA_DIRECT_STRING_MAX_IMM);
return (ecma_string_t *) ECMA_CREATE_DIRECT_STRING (ECMA_DIRECT_STRING_UINT, (uintptr_t) uint32_number);
} /* ecma_get_ecma_string_from_uint32 */
/**
* Allocate new ecma-string and fill it with ecma-number
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_ecma_string_from_number (ecma_number_t num) /**< ecma-number */
{
uint32_t uint32_num = ecma_number_to_uint32 (num);
if (num == ((ecma_number_t) uint32_num))
{
return ecma_new_ecma_string_from_uint32 (uint32_num);
}
if (ecma_number_is_nan (num))
{
return ecma_get_magic_string (LIT_MAGIC_STRING_NAN);
}
if (ecma_number_is_infinity (num))
{
lit_magic_string_id_t id = (ecma_number_is_negative (num) ? LIT_MAGIC_STRING_NEGATIVE_INFINITY_UL
: LIT_MAGIC_STRING_INFINITY_UL);
return ecma_get_magic_string (id);
}
lit_utf8_byte_t str_buf[ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER];
lit_utf8_size_t str_size = ecma_number_to_utf8_string (num, str_buf, sizeof (str_buf));
JERRY_ASSERT (str_size > 0);
#ifndef JERRY_NDEBUG
JERRY_ASSERT (lit_is_utf8_string_magic (str_buf, str_size) == LIT_MAGIC_STRING__COUNT
&& lit_is_ex_utf8_string_magic (str_buf, str_size) == lit_get_magic_string_ex_count ());
#endif /* !JERRY_NDEBUG */
lit_utf8_byte_t *data_p;
ecma_string_t *string_desc_p = ecma_new_ecma_string_from_utf8_buffer (lit_utf8_string_length (str_buf, str_size),
str_size,
&data_p);
string_desc_p->u.hash = lit_utf8_string_calc_hash (str_buf, str_size);
memcpy (data_p, str_buf, str_size);
return string_desc_p;
} /* ecma_new_ecma_string_from_number */
/**
* Returns the constant assigned to the magic string id.
*
* Note:
* Calling ecma_deref_ecma_string on the returned pointer is optional.
*
* @return pointer to ecma-string descriptor
*/
extern inline ecma_string_t * JERRY_ATTR_ALWAYS_INLINE
ecma_get_magic_string (lit_magic_string_id_t id) /**< identifier of magic string */
{
JERRY_ASSERT (id < LIT_MAGIC_STRING__COUNT);
return (ecma_string_t *) ECMA_CREATE_DIRECT_STRING (ECMA_DIRECT_STRING_MAGIC, (uintptr_t) id);
} /* ecma_get_magic_string */
/**
* Append a cesu8 string after an ecma-string
*
* Note:
* The string1_p argument is freed. If it needs to be preserved,
* call ecma_ref_ecma_string with string1_p before the call.
*
* @return concatenation of an ecma-string and a cesu8 string
*/
ecma_string_t *
ecma_append_chars_to_string (ecma_string_t *string1_p, /**< base ecma-string */
const lit_utf8_byte_t *cesu8_string2_p, /**< characters to be appended */
lit_utf8_size_t cesu8_string2_size, /**< byte size of cesu8_string2_p */
lit_utf8_size_t cesu8_string2_length) /**< character length of cesu8_string2_p */
{
JERRY_ASSERT (string1_p != NULL && cesu8_string2_size > 0 && cesu8_string2_length > 0);
if (JERRY_UNLIKELY (ecma_string_is_empty (string1_p)))
{
return ecma_new_ecma_string_from_utf8 (cesu8_string2_p, cesu8_string2_size);
}
lit_utf8_size_t cesu8_string1_size;
lit_utf8_size_t cesu8_string1_length;
uint8_t flags = ECMA_STRING_FLAG_IS_ASCII;
lit_utf8_byte_t uint32_to_string_buffer[ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32];
const lit_utf8_byte_t *cesu8_string1_p = ecma_string_get_chars (string1_p,
&cesu8_string1_size,
&cesu8_string1_length,
uint32_to_string_buffer,
&flags);
JERRY_ASSERT (!(flags & ECMA_STRING_FLAG_MUST_BE_FREED));
JERRY_ASSERT (cesu8_string1_length > 0);
JERRY_ASSERT (cesu8_string1_length <= cesu8_string1_size);
lit_utf8_size_t new_size = cesu8_string1_size + cesu8_string2_size;
/* Poor man's carry flag check: it is impossible to allocate this large string. */
if (new_size < (cesu8_string1_size | cesu8_string2_size))
{
jerry_fatal (ERR_OUT_OF_MEMORY);
}
lit_magic_string_id_t magic_string_id;
magic_string_id = lit_is_utf8_string_pair_magic (cesu8_string1_p,
cesu8_string1_size,
cesu8_string2_p,
cesu8_string2_size);
if (magic_string_id != LIT_MAGIC_STRING__COUNT)
{
ecma_deref_ecma_string (string1_p);
return ecma_get_magic_string (magic_string_id);
}
if ((flags & ECMA_STRING_FLAG_IS_UINT32) && new_size <= ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32)
{
memcpy (uint32_to_string_buffer + cesu8_string1_size, cesu8_string2_p, cesu8_string2_size);
uint32_t array_index;
if (ecma_string_to_array_index (uint32_to_string_buffer, new_size, &array_index))
{
ecma_deref_ecma_string (string1_p);
return ecma_new_ecma_string_from_uint32 (array_index);
}
}
if (lit_get_magic_string_ex_count () > 0)
{
lit_magic_string_ex_id_t magic_string_ex_id;
magic_string_ex_id = lit_is_ex_utf8_string_pair_magic (cesu8_string1_p,
cesu8_string1_size,
cesu8_string2_p,
cesu8_string2_size);
if (magic_string_ex_id < lit_get_magic_string_ex_count ())
{
ecma_deref_ecma_string (string1_p);
return ecma_new_ecma_string_from_magic_string_ex_id (magic_string_ex_id);
}
}
lit_utf8_byte_t *data_p;
ecma_string_t *string_desc_p = ecma_new_ecma_string_from_utf8_buffer (cesu8_string1_length + cesu8_string2_length,
new_size,
&data_p);
lit_string_hash_t hash_start;
if (JERRY_UNLIKELY (flags & ECMA_STRING_FLAG_REHASH_NEEDED))
{
hash_start = lit_utf8_string_calc_hash (cesu8_string1_p, cesu8_string1_size);
}
else
{
JERRY_ASSERT (!ECMA_IS_DIRECT_STRING (string1_p));
hash_start = string1_p->u.hash;
}
string_desc_p->u.hash = lit_utf8_string_hash_combine (hash_start, cesu8_string2_p, cesu8_string2_size);
memcpy (data_p, cesu8_string1_p, cesu8_string1_size);
memcpy (data_p + cesu8_string1_size, cesu8_string2_p, cesu8_string2_size);
ecma_deref_ecma_string (string1_p);
return (ecma_string_t *) string_desc_p;
} /* ecma_append_chars_to_string */
/**
* Concatenate ecma-strings
*
* Note:
* The string1_p argument is freed. If it needs to be preserved,
* call ecma_ref_ecma_string with string1_p before the call.
*
* @return concatenation of two ecma-strings
*/
ecma_string_t *
ecma_concat_ecma_strings (ecma_string_t *string1_p, /**< first ecma-string */
ecma_string_t *string2_p) /**< second ecma-string */
{
JERRY_ASSERT (string1_p != NULL && string2_p != NULL);
if (JERRY_UNLIKELY (ecma_string_is_empty (string1_p)))
{
ecma_ref_ecma_string (string2_p);
return string2_p;
}
else if (JERRY_UNLIKELY (ecma_string_is_empty (string2_p)))
{
return string1_p;
}
lit_utf8_size_t cesu8_string2_size;
lit_utf8_size_t cesu8_string2_length;
lit_utf8_byte_t uint32_to_string_buffer[ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32];
uint8_t flags = ECMA_STRING_FLAG_IS_ASCII;
const lit_utf8_byte_t *cesu8_string2_p = ecma_string_get_chars (string2_p,
&cesu8_string2_size,
&cesu8_string2_length,
uint32_to_string_buffer,
&flags);
JERRY_ASSERT (cesu8_string2_p != NULL);
ecma_string_t *result_p = ecma_append_chars_to_string (string1_p,
cesu8_string2_p,
cesu8_string2_size,
cesu8_string2_length);
JERRY_ASSERT (!(flags & ECMA_STRING_FLAG_MUST_BE_FREED));
return result_p;
} /* ecma_concat_ecma_strings */
/**
* Increase reference counter of ecma-string.
*/
void
ecma_ref_ecma_string (ecma_string_t *string_p) /**< string descriptor */
{
JERRY_ASSERT (string_p != NULL);
if (ECMA_IS_DIRECT_STRING (string_p))
{
return;
}
#ifdef JERRY_NDEBUG
if (ECMA_STRING_IS_STATIC (string_p))
{
return;
}
#endif /* JERRY_NDEBUG */
JERRY_ASSERT (string_p->refs_and_container >= ECMA_STRING_REF_ONE);
if (JERRY_LIKELY (string_p->refs_and_container < ECMA_STRING_MAX_REF))
{
/* Increase reference counter. */
string_p->refs_and_container += ECMA_STRING_REF_ONE;
}
else
{
jerry_fatal (ERR_REF_COUNT_LIMIT);
}
} /* ecma_ref_ecma_string */
/**
* Decrease reference counter and deallocate ecma-string
* if the counter becomes zero.
*/
void
ecma_deref_ecma_string (ecma_string_t *string_p) /**< ecma-string */
{
JERRY_ASSERT (string_p != NULL);
if (ECMA_IS_DIRECT_STRING (string_p))
{
return;
}
#ifdef JERRY_NDEBUG
if (ECMA_STRING_IS_STATIC (string_p))
{
return;
}
#endif /* JERRY_NDEBUG */
JERRY_ASSERT (string_p->refs_and_container >= ECMA_STRING_REF_ONE);
/* Decrease reference counter. */
string_p->refs_and_container -= ECMA_STRING_REF_ONE;
if (string_p->refs_and_container >= ECMA_STRING_REF_ONE)
{
return;
}
ecma_destroy_ecma_string (string_p);
} /* ecma_deref_ecma_string */
/**
* Deallocate an ecma-string
*/
void
ecma_destroy_ecma_string (ecma_string_t *string_p) /**< ecma-string */
{
JERRY_ASSERT (string_p != NULL);
JERRY_ASSERT (!ECMA_IS_DIRECT_STRING (string_p));
JERRY_ASSERT ((string_p->refs_and_container < ECMA_STRING_REF_ONE) || ECMA_STRING_IS_STATIC (string_p));
switch (ECMA_STRING_GET_CONTAINER (string_p))
{
case ECMA_STRING_CONTAINER_HEAP_UTF8_STRING:
{
ecma_dealloc_string_buffer (string_p, ((ecma_short_string_t *) string_p)->size + sizeof (ecma_short_string_t));
return;
}
case ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING:
{
ecma_long_string_t *long_string_p = (ecma_long_string_t *) string_p;
if (long_string_p->string_p == ECMA_LONG_STRING_BUFFER_START (long_string_p))
{
ecma_dealloc_string_buffer (string_p, long_string_p->size + sizeof (ecma_long_string_t));
return;
}
ecma_external_string_t *external_string_p = (ecma_external_string_t *) string_p;
if (external_string_p->free_cb != NULL)
{
external_string_p->free_cb ((void *) external_string_p->header.string_p);
}
ecma_dealloc_external_string (external_string_p);
return;
}
case ECMA_STRING_CONTAINER_HEAP_ASCII_STRING:
{
ecma_dealloc_string_buffer (string_p, ECMA_ASCII_STRING_GET_SIZE (string_p) + ECMA_ASCII_STRING_HEADER_SIZE);
return;
}
#if ENABLED (JERRY_ESNEXT)
case ECMA_STRING_CONTAINER_SYMBOL:
{
ecma_extended_string_t *symbol_p = (ecma_extended_string_t *) string_p;
ecma_free_value (symbol_p->u.symbol_descriptor);
ecma_dealloc_extended_string (symbol_p);
return;
}
#endif /* ENABLED (JERRY_ESNEXT) */
default:
{
JERRY_ASSERT (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_UINT32_IN_DESC
|| ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_MAGIC_STRING_EX);
/* only the string descriptor itself should be freed */
ecma_dealloc_string (string_p);
}
}
} /* ecma_destroy_ecma_string */
/**
* Convert ecma-string to number
*
* @return converted ecma-number
*/
ecma_number_t
ecma_string_to_number (const ecma_string_t *string_p) /**< ecma-string */
{
JERRY_ASSERT (string_p != NULL);
if (ECMA_IS_DIRECT_STRING (string_p))
{
if (ECMA_IS_DIRECT_STRING_WITH_TYPE (string_p, ECMA_DIRECT_STRING_UINT))
{
return (ecma_number_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
}
}
else if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_UINT32_IN_DESC)
{
return ((ecma_number_t) string_p->u.uint32_number);
}
lit_utf8_size_t size;
const lit_utf8_byte_t *chars_p = ecma_string_get_chars_fast (string_p, &size);
JERRY_ASSERT (chars_p != NULL);
if (size == 0)
{
return ECMA_NUMBER_ZERO;
}
return ecma_utf8_string_to_number (chars_p, size);
} /* ecma_string_to_number */
/**
* Check if string is array index.
*
* @return ECMA_STRING_NOT_ARRAY_INDEX if string is not array index
* the array index otherwise
*/
inline uint32_t JERRY_ATTR_ALWAYS_INLINE
ecma_string_get_array_index (const ecma_string_t *str_p) /**< ecma-string */
{
if (ECMA_IS_DIRECT_STRING (str_p))
{
if (ECMA_IS_DIRECT_STRING_WITH_TYPE (str_p, ECMA_DIRECT_STRING_UINT))
{
/* Value cannot be equal to the maximum value of a 32 bit unsigned number. */
return (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (str_p);
}
return ECMA_STRING_NOT_ARRAY_INDEX;
}
if (ECMA_STRING_GET_CONTAINER (str_p) == ECMA_STRING_CONTAINER_UINT32_IN_DESC)
{
/* When the uint32_number is equal to the maximum value of 32 bit unsigned integer number,
* it is also an invalid array index. The comparison to ECMA_STRING_NOT_ARRAY_INDEX will
* be true in this case. */
return str_p->u.uint32_number;
}
return ECMA_STRING_NOT_ARRAY_INDEX;
} /* ecma_string_get_array_index */
/**
* Convert ecma-string's contents to a cesu-8 string and put it to the buffer.
* It is the caller's responsibility to make sure that the string fits in the buffer.
*
* @return number of bytes, actually copied to the buffer.
*/
lit_utf8_size_t JERRY_ATTR_WARN_UNUSED_RESULT
ecma_string_copy_to_cesu8_buffer (const ecma_string_t *string_p, /**< ecma-string descriptor */
lit_utf8_byte_t *buffer_p, /**< destination buffer pointer
* (can be NULL if buffer_size == 0) */
lit_utf8_size_t buffer_size) /**< size of buffer */
{
JERRY_ASSERT (string_p != NULL);
JERRY_ASSERT (buffer_p != NULL || buffer_size == 0);
JERRY_ASSERT (ecma_string_get_size (string_p) <= buffer_size);
lit_utf8_size_t size;
if (ECMA_IS_DIRECT_STRING (string_p))
{
if (ECMA_IS_DIRECT_STRING_WITH_TYPE (string_p, ECMA_DIRECT_STRING_UINT))
{
uint32_t uint32_number = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
size = ecma_uint32_to_utf8_string (uint32_number, buffer_p, buffer_size);
JERRY_ASSERT (size <= buffer_size);
return size;
}
}
else
{
JERRY_ASSERT (string_p->refs_and_container >= ECMA_STRING_REF_ONE);
if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_UINT32_IN_DESC)
{
uint32_t uint32_number = string_p->u.uint32_number;
size = ecma_uint32_to_utf8_string (uint32_number, buffer_p, buffer_size);
JERRY_ASSERT (size <= buffer_size);
return size;
}
}
const lit_utf8_byte_t *chars_p = ecma_string_get_chars_fast (string_p, &size);
JERRY_ASSERT (chars_p != NULL);
JERRY_ASSERT (size <= buffer_size);
memcpy (buffer_p, chars_p, size);
return size;
} /* ecma_string_copy_to_cesu8_buffer */
/**
* Convert ecma-string's contents to an utf-8 string and put it to the buffer.
* It is the caller's responsibility to make sure that the string fits in the buffer.
*
* @return number of bytes, actually copied to the buffer.
*/
lit_utf8_size_t JERRY_ATTR_WARN_UNUSED_RESULT
ecma_string_copy_to_utf8_buffer (const ecma_string_t *string_p, /**< ecma-string descriptor */
lit_utf8_byte_t *buffer_p, /**< destination buffer pointer
* (can be NULL if buffer_size == 0) */
lit_utf8_size_t buffer_size) /**< size of buffer */
{
JERRY_ASSERT (string_p != NULL);
JERRY_ASSERT (buffer_p != NULL || buffer_size == 0);
JERRY_ASSERT (ecma_string_get_utf8_size (string_p) <= buffer_size);
lit_utf8_size_t size;
if (ECMA_IS_DIRECT_STRING (string_p))
{
if (ECMA_IS_DIRECT_STRING_WITH_TYPE (string_p, ECMA_DIRECT_STRING_UINT))
{
uint32_t uint32_number = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
size = ecma_uint32_to_utf8_string (uint32_number, buffer_p, buffer_size);
JERRY_ASSERT (size <= buffer_size);
return size;
}
}
else
{
JERRY_ASSERT (string_p->refs_and_container >= ECMA_STRING_REF_ONE);
if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_UINT32_IN_DESC)
{
uint32_t uint32_number = string_p->u.uint32_number;
size = ecma_uint32_to_utf8_string (uint32_number, buffer_p, buffer_size);
JERRY_ASSERT (size <= buffer_size);
return size;
}
}
uint8_t flags = ECMA_STRING_FLAG_IS_ASCII;
const lit_utf8_byte_t *chars_p = ecma_string_get_chars (string_p, &size, NULL, NULL, &flags);
JERRY_ASSERT (chars_p != NULL);
if (flags & ECMA_STRING_FLAG_IS_ASCII)
{
JERRY_ASSERT (size <= buffer_size);
memcpy (buffer_p, chars_p, size);
return size;
}
size = lit_convert_cesu8_string_to_utf8_string (chars_p,
size,
buffer_p,
buffer_size);
if (flags & ECMA_STRING_FLAG_MUST_BE_FREED)
{
jmem_heap_free_block ((void *) chars_p, size);
}
JERRY_ASSERT (size <= buffer_size);
return size;
} /* ecma_string_copy_to_utf8_buffer */
/**
* Convert ecma-string's contents to a cesu-8 string, extract the parts of the converted string between the specified
* start position and the end position (or the end of the string, whichever comes first), and copy these characters
* into the buffer.
*
* @return number of bytes, actually copied to the buffer.
*/
lit_utf8_size_t
ecma_substring_copy_to_cesu8_buffer (const ecma_string_t *string_desc_p, /**< ecma-string descriptor */
lit_utf8_size_t start_pos, /**< position of the first character */
lit_utf8_size_t end_pos, /**< position of the last character */
lit_utf8_byte_t *buffer_p, /**< destination buffer pointer
* (can be NULL if buffer_size == 0) */
lit_utf8_size_t buffer_size) /**< size of buffer */
{
JERRY_ASSERT (string_desc_p != NULL);
JERRY_ASSERT (buffer_p != NULL || buffer_size == 0);
lit_utf8_size_t string_length = ecma_string_get_length (string_desc_p);
lit_utf8_size_t size = 0;
if (start_pos >= string_length || start_pos >= end_pos)
{
return 0;
}
if (end_pos > string_length)
{
end_pos = string_length;
}
ECMA_STRING_TO_UTF8_STRING (string_desc_p, utf8_str_p, utf8_str_size);
const lit_utf8_byte_t *start_p = utf8_str_p;
if (string_length == utf8_str_size)
{
start_p += start_pos;
size = end_pos - start_pos;
if (size > buffer_size)
{
size = buffer_size;
}
memcpy (buffer_p, start_p, size);
}
else
{
end_pos -= start_pos;
while (start_pos--)
{
start_p += lit_get_unicode_char_size_by_utf8_first_byte (*start_p);
}
const lit_utf8_byte_t *end_p = start_p;
while (end_pos--)
{
lit_utf8_size_t code_unit_size = lit_get_unicode_char_size_by_utf8_first_byte (*end_p);
if ((size + code_unit_size) > buffer_size)
{
break;
}
end_p += code_unit_size;
size += code_unit_size;
}
memcpy (buffer_p, start_p, size);
}
ECMA_FINALIZE_UTF8_STRING (utf8_str_p, utf8_str_size);
JERRY_ASSERT (size <= buffer_size);
return size;
} /* ecma_substring_copy_to_cesu8_buffer */
/**
* Convert ecma-string's contents to an utf-8 string, extract the parts of the converted string between the specified
* start position and the end position (or the end of the string, whichever comes first), and copy these characters
* into the buffer.
*
* @return number of bytes, actually copied to the buffer.
*/
lit_utf8_size_t
ecma_substring_copy_to_utf8_buffer (const ecma_string_t *string_desc_p, /**< ecma-string descriptor */
lit_utf8_size_t start_pos, /**< position of the first character */
lit_utf8_size_t end_pos, /**< position of the last character */
lit_utf8_byte_t *buffer_p, /**< destination buffer pointer
* (can be NULL if buffer_size == 0) */
lit_utf8_size_t buffer_size) /**< size of buffer */
{
JERRY_ASSERT (string_desc_p != NULL);
JERRY_ASSERT (ECMA_IS_DIRECT_STRING (string_desc_p) || string_desc_p->refs_and_container >= ECMA_STRING_REF_ONE);
JERRY_ASSERT (buffer_p != NULL || buffer_size == 0);
lit_utf8_size_t size = 0;
lit_utf8_size_t utf8_str_length = ecma_string_get_utf8_length (string_desc_p);
if (start_pos >= utf8_str_length || start_pos >= end_pos)
{
return 0;
}
if (end_pos > utf8_str_length)
{
end_pos = utf8_str_length;
}
ECMA_STRING_TO_UTF8_STRING (string_desc_p, cesu8_str_p, cesu8_str_size);
lit_utf8_size_t cesu8_str_length = ecma_string_get_length (string_desc_p);
if (cesu8_str_length == cesu8_str_size)
{
cesu8_str_p += start_pos;
size = end_pos - start_pos;
if (size > buffer_size)
{
size = buffer_size;
}
memcpy (buffer_p, cesu8_str_p, size);
}
else
{
const lit_utf8_byte_t *cesu8_end_pos = cesu8_str_p + cesu8_str_size;
end_pos -= start_pos;
while (start_pos--)
{
ecma_char_t ch;
lit_utf8_size_t code_unit_size = lit_read_code_unit_from_utf8 (cesu8_str_p, &ch);
cesu8_str_p += code_unit_size;
if ((cesu8_str_p != cesu8_end_pos) && lit_is_code_point_utf16_high_surrogate (ch))
{
ecma_char_t next_ch;
lit_utf8_size_t next_ch_size = lit_read_code_unit_from_utf8 (cesu8_str_p, &next_ch);
if (lit_is_code_point_utf16_low_surrogate (next_ch))
{
JERRY_ASSERT (code_unit_size == next_ch_size);
cesu8_str_p += code_unit_size;
}
}
}
const lit_utf8_byte_t *cesu8_pos = cesu8_str_p;
lit_utf8_byte_t *utf8_pos = buffer_p;
lit_utf8_byte_t *utf8_end_pos = buffer_p + buffer_size;
while (end_pos--)
{
ecma_char_t ch;
lit_utf8_size_t code_unit_size = lit_read_code_unit_from_utf8 (cesu8_pos, &ch);
if ((size + code_unit_size) > buffer_size)
{
break;
}
if (((cesu8_pos + code_unit_size) != cesu8_end_pos) && lit_is_code_point_utf16_high_surrogate (ch))
{
ecma_char_t next_ch;
lit_utf8_size_t next_ch_size = lit_read_code_unit_from_utf8 (cesu8_pos + code_unit_size, &next_ch);
if (lit_is_code_point_utf16_low_surrogate (next_ch))
{
JERRY_ASSERT (code_unit_size == next_ch_size);
if ((size + code_unit_size + 1) > buffer_size)
{
break;
}
cesu8_pos += next_ch_size;
lit_code_point_t code_point = lit_convert_surrogate_pair_to_code_point (ch, next_ch);
lit_code_point_to_utf8 (code_point, utf8_pos);
size += (code_unit_size + 1);
}
else
{
memcpy (utf8_pos, cesu8_pos, code_unit_size);
size += code_unit_size;
}
}
else
{
memcpy (utf8_pos, cesu8_pos, code_unit_size);
size += code_unit_size;
}
utf8_pos = buffer_p + size;
cesu8_pos += code_unit_size;
}
JERRY_ASSERT (utf8_pos <= utf8_end_pos);
}
ECMA_FINALIZE_UTF8_STRING (cesu8_str_p, cesu8_str_size);
JERRY_ASSERT (size <= buffer_size);
return size;
} /* ecma_substring_copy_to_utf8_buffer */
/**
* Convert ecma-string's contents to a cesu-8 string and put it to the buffer.
* It is the caller's responsibility to make sure that the string fits in the buffer.
* Check if the size of the string is equal with the size of the buffer.
*/
inline void JERRY_ATTR_ALWAYS_INLINE
ecma_string_to_utf8_bytes (const ecma_string_t *string_desc_p, /**< ecma-string descriptor */
lit_utf8_byte_t *buffer_p, /**< destination buffer pointer
* (can be NULL if buffer_size == 0) */
lit_utf8_size_t buffer_size) /**< size of buffer */
{
const lit_utf8_size_t size = ecma_string_copy_to_cesu8_buffer (string_desc_p, buffer_p, buffer_size);
JERRY_ASSERT (size == buffer_size);
} /* ecma_string_to_utf8_bytes */
/**
* Get size of the uint32 number stored locally in the string's descriptor
*
* Note: the represented number size and length are equal
*
* @return size in bytes
*/
static inline lit_utf8_size_t JERRY_ATTR_ALWAYS_INLINE
ecma_string_get_uint32_size (const uint32_t uint32_number) /**< number in the string-descriptor */
{
uint32_t prev_number = 1;
uint32_t next_number = 100;
lit_utf8_size_t size = 1;
const uint32_t max_size = 9;
while (size < max_size && uint32_number >= next_number)
{
prev_number = next_number;
next_number *= 100;
size += 2;
}
if (uint32_number >= prev_number * 10)
{
size++;
}
return size;
} /* ecma_string_get_uint32_size */
/**
* Checks whether the given string is a sequence of ascii characters.
*/
#define ECMA_STRING_IS_ASCII(char_p, size) ((size) == lit_utf8_string_length ((char_p), (size)))
/**
* Returns with the cesu8 character array of a string.
*
* Note:
* - This function returns with a newly allocated buffer for uint32 strings,
* which must be freed if the optional uint32_buff_p parameter is NULL.
* - The ASCII check only happens if the flags parameter gets
* 'ECMA_STRING_FLAG_IS_ASCII' as an input.
*
* @return start of cesu8 characters
*/
const lit_utf8_byte_t *
ecma_string_get_chars (const ecma_string_t *string_p, /**< ecma-string */
lit_utf8_size_t *size_p, /**< [out] size of the ecma string */
lit_utf8_size_t *length_p, /**< [out] optional argument. If the pointer is not NULL the pointed
* memory area is filled with the length of the ecma string */
lit_utf8_byte_t *uint32_buff_p, /**< [out] optional argument. If the pointer is not NULL the
* pointed memory area is filled with the string converted
* uint32 string descriptor */
uint8_t *flags_p) /**< [in,out] any combination of ecma_string_flag_t bits */
{
lit_utf8_size_t length;
lit_utf8_size_t size;
const lit_utf8_byte_t *result_p;
if (ECMA_IS_DIRECT_STRING (string_p))
{
*flags_p |= ECMA_STRING_FLAG_REHASH_NEEDED;
switch (ECMA_GET_DIRECT_STRING_TYPE (string_p))
{
case ECMA_DIRECT_STRING_MAGIC:
{
uint32_t id = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
if (id >= LIT_MAGIC_STRING__COUNT)
{
id -= LIT_MAGIC_STRING__COUNT;
size = lit_get_magic_string_ex_size (id);
result_p = lit_get_magic_string_ex_utf8 (id);
length = 0;
if (JERRY_UNLIKELY (*flags_p & ECMA_STRING_FLAG_IS_ASCII))
{
length = lit_utf8_string_length (result_p, size);
}
}
else
{
size = lit_get_magic_string_size (id);
length = size;
result_p = lit_get_magic_string_utf8 (id);
/* All magic strings must be ascii strings. */
JERRY_ASSERT (ECMA_STRING_IS_ASCII (result_p, size));
}
break;
}
default:
{
JERRY_ASSERT (ECMA_GET_DIRECT_STRING_TYPE (string_p) == ECMA_DIRECT_STRING_UINT);
uint32_t uint32_number = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
size = (lit_utf8_size_t) ecma_string_get_uint32_size (uint32_number);
if (uint32_buff_p != NULL)
{
result_p = uint32_buff_p;
}
else
{
result_p = (const lit_utf8_byte_t *) jmem_heap_alloc_block (size);
*flags_p |= ECMA_STRING_FLAG_MUST_BE_FREED;
}
length = ecma_uint32_to_utf8_string (uint32_number, (lit_utf8_byte_t *) result_p, size);
JERRY_ASSERT (length == size);
*flags_p |= ECMA_STRING_FLAG_IS_UINT32;
break;
}
}
}
else
{
JERRY_ASSERT (string_p->refs_and_container >= ECMA_STRING_REF_ONE);
switch (ECMA_STRING_GET_CONTAINER (string_p))
{
case ECMA_STRING_CONTAINER_HEAP_UTF8_STRING:
{
ecma_short_string_t *short_string_p = (ecma_short_string_t *) string_p;
size = short_string_p->size;
length = short_string_p->length;
result_p = ECMA_SHORT_STRING_GET_BUFFER (short_string_p);
break;
}
case ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING:
{
ecma_long_string_t *long_string_desc_p = (ecma_long_string_t *) string_p;
size = long_string_desc_p->size;
length = long_string_desc_p->length;
result_p = long_string_desc_p->string_p;
break;
}
case ECMA_STRING_CONTAINER_HEAP_ASCII_STRING:
{
size = ECMA_ASCII_STRING_GET_SIZE (string_p);
length = size;
result_p = ECMA_ASCII_STRING_GET_BUFFER (string_p);
break;
}
case ECMA_STRING_CONTAINER_UINT32_IN_DESC:
{
size = (lit_utf8_size_t) ecma_string_get_uint32_size (string_p->u.uint32_number);
if (uint32_buff_p != NULL)
{
result_p = uint32_buff_p;
}
else
{
result_p = (const lit_utf8_byte_t *) jmem_heap_alloc_block (size);
*flags_p |= ECMA_STRING_FLAG_MUST_BE_FREED;
}
length = ecma_uint32_to_utf8_string (string_p->u.uint32_number, (lit_utf8_byte_t *) result_p, size);
JERRY_ASSERT (length == size);
*flags_p |= ECMA_STRING_FLAG_IS_UINT32 | ECMA_STRING_FLAG_REHASH_NEEDED;
break;
}
default:
{
JERRY_ASSERT (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_MAGIC_STRING_EX);
lit_magic_string_ex_id_t id = LIT_MAGIC_STRING__COUNT - string_p->u.magic_string_ex_id;
size = lit_get_magic_string_ex_size (id);
length = 0;
if (JERRY_UNLIKELY (*flags_p & ECMA_STRING_FLAG_IS_ASCII))
{
length = lit_utf8_string_length (lit_get_magic_string_ex_utf8 (id), size);
}
result_p = lit_get_magic_string_ex_utf8 (id);
*flags_p |= ECMA_STRING_FLAG_REHASH_NEEDED;
break;
}
}
}
*size_p = size;
if (length_p != NULL)
{
*length_p = length;
}
if ((*flags_p & ECMA_STRING_FLAG_IS_ASCII)
&& length != size)
{
*flags_p = (uint8_t) (*flags_p & (uint8_t) ~ECMA_STRING_FLAG_IS_ASCII);
}
return result_p;
} /* ecma_string_get_chars */
/**
* Checks whether the string equals to the magic string id.
*
* @return true - if the string equals to the magic string id
* false - otherwise
*/
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_compare_ecma_string_to_magic_id (const ecma_string_t *string_p, /**< property name */
lit_magic_string_id_t id) /**< magic string id */
{
return (string_p == ecma_get_magic_string (id));
} /* ecma_compare_ecma_string_to_magic_id */
/**
* Checks whether ecma string is empty or not
*
* @return true - if the string is an empty string
* false - otherwise
*/
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_string_is_empty (const ecma_string_t *string_p) /**< ecma-string */
{
return ecma_compare_ecma_string_to_magic_id (string_p, LIT_MAGIC_STRING__EMPTY);
} /* ecma_string_is_empty */
/**
* Checks whether the string equals to "length".
*
* @return true - if the string equals to "length"
* false - otherwise
*/
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_string_is_length (const ecma_string_t *string_p) /**< property name */
{
return ecma_compare_ecma_string_to_magic_id (string_p, LIT_MAGIC_STRING_LENGTH);
} /* ecma_string_is_length */
/**
* Converts a property name into a string
*
* @return pointer to the converted ecma string
*/
static inline ecma_string_t * JERRY_ATTR_ALWAYS_INLINE
ecma_property_to_string (ecma_property_t property, /**< property name type */
jmem_cpointer_t prop_name_cp) /**< property name compressed pointer */
{
uintptr_t property_string = ((uintptr_t) (property)) & (0x3 << ECMA_PROPERTY_NAME_TYPE_SHIFT);
property_string = (property_string >> ECMA_STRING_TYPE_CONVERSION_SHIFT) | ECMA_TYPE_DIRECT_STRING;
return (ecma_string_t *) (property_string | (((uintptr_t) prop_name_cp) << ECMA_DIRECT_STRING_SHIFT));
} /* ecma_property_to_string */
/**
* Converts a string into a property name
*
* @return the compressed pointer part of the name
*/
inline jmem_cpointer_t JERRY_ATTR_ALWAYS_INLINE
ecma_string_to_property_name (ecma_string_t *prop_name_p, /**< property name */
ecma_property_t *name_type_p) /**< [out] property name type */
{
if (ECMA_IS_DIRECT_STRING (prop_name_p))
{
*name_type_p = (ecma_property_t) ECMA_DIRECT_STRING_TYPE_TO_PROP_NAME_TYPE (prop_name_p);
return (jmem_cpointer_t) ECMA_GET_DIRECT_STRING_VALUE (prop_name_p);
}
*name_type_p = ECMA_DIRECT_STRING_PTR << ECMA_PROPERTY_NAME_TYPE_SHIFT;
ecma_ref_ecma_string (prop_name_p);
jmem_cpointer_t prop_name_cp;
ECMA_SET_NON_NULL_POINTER (prop_name_cp, prop_name_p);
return prop_name_cp;
} /* ecma_string_to_property_name */
/**
* Converts a property name into a string
*
* @return the string pointer
* string must be released with ecma_deref_ecma_string
*/
ecma_string_t *
ecma_string_from_property_name (ecma_property_t property, /**< property name type */
jmem_cpointer_t prop_name_cp) /**< property name compressed pointer */
{
if (ECMA_PROPERTY_GET_NAME_TYPE (property) != ECMA_DIRECT_STRING_PTR)
{
return ecma_property_to_string (property, prop_name_cp);
}
ecma_string_t *prop_name_p = ECMA_GET_NON_NULL_POINTER (ecma_string_t, prop_name_cp);
ecma_ref_ecma_string (prop_name_p);
return prop_name_p;
} /* ecma_string_from_property_name */
/**
* Get hash code of property name
*
* @return hash code of property name
*/
inline lit_string_hash_t JERRY_ATTR_ALWAYS_INLINE
ecma_string_get_property_name_hash (ecma_property_t property, /**< property name type */
jmem_cpointer_t prop_name_cp) /**< property name compressed pointer */
{
if (ECMA_PROPERTY_GET_NAME_TYPE (property) == ECMA_DIRECT_STRING_PTR)
{
ecma_string_t *prop_name_p = ECMA_GET_NON_NULL_POINTER (ecma_string_t, prop_name_cp);
return prop_name_p->u.hash;
}
return (lit_string_hash_t) prop_name_cp;
} /* ecma_string_get_property_name_hash */
/**
* Check if property name is array index.
*
* @return ECMA_STRING_NOT_ARRAY_INDEX if string is not array index
* the array index otherwise
*/
uint32_t
ecma_string_get_property_index (ecma_property_t property, /**< property name type */
jmem_cpointer_t prop_name_cp) /**< property name compressed pointer */
{
switch (ECMA_PROPERTY_GET_NAME_TYPE (property))
{
case ECMA_DIRECT_STRING_UINT:
{
return (uint32_t) prop_name_cp;
}
case ECMA_DIRECT_STRING_PTR:
{
ecma_string_t *prop_name_p = ECMA_GET_NON_NULL_POINTER (ecma_string_t, prop_name_cp);
return ecma_string_get_array_index (prop_name_p);
}
default:
{
return ECMA_STRING_NOT_ARRAY_INDEX;
}
}
} /* ecma_string_get_property_index */
/**
* Compare a property name to a string
*
* @return true if they are equals
* false otherwise
*/
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_string_compare_to_property_name (ecma_property_t property, /**< property name type */
jmem_cpointer_t prop_name_cp, /**< property name compressed pointer */
const ecma_string_t *string_p) /**< other string */
{
if (ECMA_PROPERTY_GET_NAME_TYPE (property) != ECMA_DIRECT_STRING_PTR)
{
return ecma_property_to_string (property, prop_name_cp) == string_p;
}
if (ECMA_IS_DIRECT_STRING (string_p))
{
return false;
}
ecma_string_t *prop_name_p = ECMA_GET_NON_NULL_POINTER (ecma_string_t, prop_name_cp);
return ecma_compare_ecma_non_direct_strings (prop_name_p, string_p);
} /* ecma_string_compare_to_property_name */
/**
* Helper for ecma_compare_ecma_strings_longpath to get string data
*
* @return string characters
*/
static const lit_utf8_byte_t *
ecma_compare_get_string_chars (const ecma_string_t *string_p, /**< ecma-string */
lit_utf8_size_t *size_and_length_p) /**< [out] size and length */
{
switch (ECMA_STRING_GET_CONTAINER (string_p))
{
case ECMA_STRING_CONTAINER_HEAP_UTF8_STRING:
{
ecma_short_string_t *short_string_p = (ecma_short_string_t *) string_p;
size_and_length_p[0] = short_string_p->size;
size_and_length_p[1] = short_string_p->length;
return ECMA_SHORT_STRING_GET_BUFFER (string_p);
}
case ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING:
{
ecma_long_string_t *long_string_p = (ecma_long_string_t *) string_p;
size_and_length_p[0] = long_string_p->size;
size_and_length_p[1] = long_string_p->length;
return long_string_p->string_p;
}
case ECMA_STRING_CONTAINER_HEAP_ASCII_STRING:
{
size_and_length_p[0] = ECMA_ASCII_STRING_GET_SIZE (string_p);
size_and_length_p[1] = size_and_length_p[0];
return ECMA_ASCII_STRING_GET_BUFFER (string_p);
}
default:
{
return NULL;
}
}
} /* ecma_compare_get_string_chars */
/**
* Long path part of ecma-string to ecma-string comparison routine
*
* See also:
* ecma_compare_ecma_strings
*
* @return true - if strings are equal;
* false - otherwise
*/
static bool JERRY_ATTR_NOINLINE
ecma_compare_ecma_strings_longpath (const ecma_string_t *string1_p, /**< ecma-string */
const ecma_string_t *string2_p) /**< ecma-string */
{
const lit_utf8_byte_t *utf8_string1_p, *utf8_string2_p;
lit_utf8_size_t string1_size_and_length[2], string2_size_and_length[2];
utf8_string1_p = ecma_compare_get_string_chars (string1_p, string1_size_and_length);
utf8_string2_p = ecma_compare_get_string_chars (string2_p, string2_size_and_length);
if (utf8_string1_p == NULL || utf8_string2_p == NULL)
{
return false;
}
if (string1_size_and_length[0] != string2_size_and_length[0]
|| string1_size_and_length[1] != string2_size_and_length[1])
{
return false;
}
return !memcmp ((char *) utf8_string1_p, (char *) utf8_string2_p, string1_size_and_length[0]);
} /* ecma_compare_ecma_strings_longpath */
/**
* Compare two ecma-strings
*
* @return true - if strings are equal;
* false - otherwise
*/
extern inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_compare_ecma_strings (const ecma_string_t *string1_p, /**< ecma-string */
const ecma_string_t *string2_p) /**< ecma-string */
{
JERRY_ASSERT (string1_p != NULL && string2_p != NULL);
/* Fast paths first. */
if (string1_p == string2_p)
{
return true;
}
/* Either string is direct, return with false. */
if (ECMA_IS_DIRECT_STRING (((uintptr_t) string1_p) | ((uintptr_t) string2_p)))
{
return false;
}
/* Also compares uint32 values in descriptor. */
if (string1_p->u.hash != string2_p->u.hash)
{
return false;
}
if (ECMA_STRING_GET_CONTAINER (string1_p) == ECMA_STRING_CONTAINER_UINT32_IN_DESC)
{
return ECMA_STRING_GET_CONTAINER (string2_p) == ECMA_STRING_CONTAINER_UINT32_IN_DESC;
}
return ecma_compare_ecma_strings_longpath (string1_p, string2_p);
} /* ecma_compare_ecma_strings */
/**
* Compare two non-direct ecma-strings
*
* @return true - if strings are equal;
* false - otherwise
*/
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_compare_ecma_non_direct_strings (const ecma_string_t *string1_p, /**< ecma-string */
const ecma_string_t *string2_p) /**< ecma-string */
{
JERRY_ASSERT (string1_p != NULL && string2_p != NULL);
JERRY_ASSERT (!ECMA_IS_DIRECT_STRING (string1_p) && !ECMA_IS_DIRECT_STRING (string2_p));
/* Fast paths first. */
if (string1_p == string2_p)
{
return true;
}
if (string1_p->u.hash != string2_p->u.hash)
{
return false;
}
if (ECMA_STRING_GET_CONTAINER (string1_p) == ECMA_STRING_CONTAINER_UINT32_IN_DESC)
{
return ECMA_STRING_GET_CONTAINER (string2_p) == ECMA_STRING_CONTAINER_UINT32_IN_DESC;
}
return ecma_compare_ecma_strings_longpath (string1_p, string2_p);
} /* ecma_compare_ecma_non_direct_strings */
/**
* Relational compare of ecma-strings.
*
* First string is less than second string if:
* - strings are not equal;
* - first string is prefix of second or is lexicographically less than second.
*
* @return true - if first string is less than second string,
* false - otherwise
*/
bool
ecma_compare_ecma_strings_relational (const ecma_string_t *string1_p, /**< ecma-string */
const ecma_string_t *string2_p) /**< ecma-string */
{
if (ecma_compare_ecma_strings (string1_p,
string2_p))
{
return false;
}
const lit_utf8_byte_t *utf8_string1_p, *utf8_string2_p;
lit_utf8_size_t utf8_string1_size, utf8_string2_size;
lit_utf8_byte_t uint32_to_string_buffer1[ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32];
lit_utf8_byte_t uint32_to_string_buffer2[ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32];
if (ECMA_IS_DIRECT_STRING (string1_p))
{
if (ECMA_GET_DIRECT_STRING_TYPE (string1_p) != ECMA_DIRECT_STRING_UINT)
{
utf8_string1_p = ecma_string_get_chars_fast (string1_p, &utf8_string1_size);
}
else
{
utf8_string1_size = ecma_uint32_to_utf8_string ((uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string1_p),
uint32_to_string_buffer1,
ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32);
utf8_string1_p = uint32_to_string_buffer1;
}
}
else
{
JERRY_ASSERT (string1_p->refs_and_container >= ECMA_STRING_REF_ONE);
if (ECMA_STRING_GET_CONTAINER (string1_p) != ECMA_STRING_CONTAINER_UINT32_IN_DESC)
{
utf8_string1_p = ecma_string_get_chars_fast (string1_p, &utf8_string1_size);
}
else
{
utf8_string1_size = ecma_uint32_to_utf8_string (string1_p->u.uint32_number,
uint32_to_string_buffer1,
ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32);
utf8_string1_p = uint32_to_string_buffer1;
}
}
if (ECMA_IS_DIRECT_STRING (string2_p))
{
if (ECMA_GET_DIRECT_STRING_TYPE (string2_p) != ECMA_DIRECT_STRING_UINT)
{
utf8_string2_p = ecma_string_get_chars_fast (string2_p, &utf8_string2_size);
}
else
{
utf8_string2_size = ecma_uint32_to_utf8_string ((uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string2_p),
uint32_to_string_buffer2,
ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32);
utf8_string2_p = uint32_to_string_buffer2;
}
}
else
{
JERRY_ASSERT (string2_p->refs_and_container >= ECMA_STRING_REF_ONE);
if (ECMA_STRING_GET_CONTAINER (string2_p) != ECMA_STRING_CONTAINER_UINT32_IN_DESC)
{
utf8_string2_p = ecma_string_get_chars_fast (string2_p, &utf8_string2_size);
}
else
{
utf8_string2_size = ecma_uint32_to_utf8_string (string2_p->u.uint32_number,
uint32_to_string_buffer2,
ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32);
utf8_string2_p = uint32_to_string_buffer2;
}
}
return lit_compare_utf8_strings_relational (utf8_string1_p,
utf8_string1_size,
utf8_string2_p,
utf8_string2_size);
} /* ecma_compare_ecma_strings_relational */
/**
* Special value to represent that no size is available.
*/
#define ECMA_STRING_NO_ASCII_SIZE 0xffffffff
/**
* Return the size of uint32 and magic strings.
* The length of these strings are equal to their size.
*
* @return number of characters in the string
*/
static lit_utf8_size_t
ecma_string_get_ascii_size (const ecma_string_t *string_p) /**< ecma-string */
{
if (ECMA_IS_DIRECT_STRING (string_p))
{
switch (ECMA_GET_DIRECT_STRING_TYPE (string_p))
{
case ECMA_DIRECT_STRING_MAGIC:
{
uint32_t id = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
if (id >= LIT_MAGIC_STRING__COUNT)
{
return ECMA_STRING_NO_ASCII_SIZE;
}
JERRY_ASSERT (ECMA_STRING_IS_ASCII (lit_get_magic_string_utf8 (id),
lit_get_magic_string_size (id)));
return lit_get_magic_string_size (id);
}
default:
{
JERRY_ASSERT (ECMA_GET_DIRECT_STRING_TYPE (string_p) == ECMA_DIRECT_STRING_UINT);
uint32_t uint32_number = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
return ecma_string_get_uint32_size (uint32_number);
}
}
}
JERRY_ASSERT (string_p->refs_and_container >= ECMA_STRING_REF_ONE);
if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_UINT32_IN_DESC)
{
return ecma_string_get_uint32_size (string_p->u.uint32_number);
}
else if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_HEAP_ASCII_STRING)
{
return ECMA_ASCII_STRING_GET_SIZE (string_p);
}
return ECMA_STRING_NO_ASCII_SIZE;
} /* ecma_string_get_ascii_size */
/**
* Get length of ecma-string
*
* @return number of characters in the string
*/
lit_utf8_size_t
ecma_string_get_length (const ecma_string_t *string_p) /**< ecma-string */
{
lit_utf8_size_t length = ecma_string_get_ascii_size (string_p);
if (length != ECMA_STRING_NO_ASCII_SIZE)
{
return length;
}
if (ECMA_IS_DIRECT_STRING (string_p))
{
JERRY_ASSERT (ECMA_GET_DIRECT_STRING_TYPE (string_p) == ECMA_DIRECT_STRING_MAGIC);
JERRY_ASSERT ((uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p) >= LIT_MAGIC_STRING__COUNT);
uint32_t id = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p) - LIT_MAGIC_STRING__COUNT;
return lit_utf8_string_length (lit_get_magic_string_ex_utf8 (id),
lit_get_magic_string_ex_size (id));
}
if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_HEAP_UTF8_STRING)
{
return ((ecma_short_string_t *) string_p)->length;
}
if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING)
{
return ((ecma_long_string_t *) string_p)->length;
}
JERRY_ASSERT (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_MAGIC_STRING_EX);
lit_magic_string_ex_id_t id = LIT_MAGIC_STRING__COUNT - string_p->u.magic_string_ex_id;
return lit_utf8_string_length (lit_get_magic_string_ex_utf8 (id),
lit_get_magic_string_ex_size (id));
} /* ecma_string_get_length */
/**
* Get length of UTF-8 encoded string length from ecma-string
*
* @return number of characters in the UTF-8 encoded string
*/
lit_utf8_size_t
ecma_string_get_utf8_length (const ecma_string_t *string_p) /**< ecma-string */
{
lit_utf8_size_t length = ecma_string_get_ascii_size (string_p);
if (length != ECMA_STRING_NO_ASCII_SIZE)
{
return length;
}
if (ECMA_IS_DIRECT_STRING (string_p))
{
JERRY_ASSERT (ECMA_GET_DIRECT_STRING_TYPE (string_p) == ECMA_DIRECT_STRING_MAGIC);
JERRY_ASSERT ((uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p) >= LIT_MAGIC_STRING__COUNT);
uint32_t id = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p) - LIT_MAGIC_STRING__COUNT;
return lit_get_utf8_length_of_cesu8_string (lit_get_magic_string_ex_utf8 (id),
lit_get_magic_string_ex_size (id));
}
if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_HEAP_UTF8_STRING)
{
ecma_short_string_t *short_string_p = (ecma_short_string_t *) string_p;
lit_utf8_size_t size = short_string_p->size;
if (size == short_string_p->length)
{
return size;
}
return lit_get_utf8_length_of_cesu8_string (ECMA_SHORT_STRING_GET_BUFFER (string_p), size);
}
if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING)
{
ecma_long_string_t *long_string_p = (ecma_long_string_t *) string_p;
lit_utf8_size_t size = long_string_p->size;
if (size == long_string_p->length)
{
return size;
}
return lit_get_utf8_length_of_cesu8_string (long_string_p->string_p, size);
}
JERRY_ASSERT (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_MAGIC_STRING_EX);
lit_magic_string_ex_id_t id = LIT_MAGIC_STRING__COUNT - string_p->u.magic_string_ex_id;
return lit_get_utf8_length_of_cesu8_string (lit_get_magic_string_ex_utf8 (id),
lit_get_magic_string_ex_size (id));
} /* ecma_string_get_utf8_length */
/**
* Get size of ecma-string
*
* @return number of bytes in the buffer needed to represent the string
*/
lit_utf8_size_t
ecma_string_get_size (const ecma_string_t *string_p) /**< ecma-string */
{
lit_utf8_size_t length = ecma_string_get_ascii_size (string_p);
if (length != ECMA_STRING_NO_ASCII_SIZE)
{
return length;
}
if (ECMA_IS_DIRECT_STRING (string_p))
{
JERRY_ASSERT (ECMA_GET_DIRECT_STRING_TYPE (string_p) == ECMA_DIRECT_STRING_MAGIC);
JERRY_ASSERT ((uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p) >= LIT_MAGIC_STRING__COUNT);
return lit_get_magic_string_ex_size ((uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p) - LIT_MAGIC_STRING__COUNT);
}
if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_HEAP_UTF8_STRING)
{
return ((ecma_short_string_t *) string_p)->size;
}
if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING)
{
return ((ecma_long_string_t *) string_p)->size;
}
JERRY_ASSERT (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_MAGIC_STRING_EX);
return lit_get_magic_string_ex_size (LIT_MAGIC_STRING__COUNT - string_p->u.magic_string_ex_id);
} /* ecma_string_get_size */
/**
* Get the UTF-8 encoded string size from ecma-string
*
* @return number of bytes in the buffer needed to represent an UTF-8 encoded string
*/
lit_utf8_size_t
ecma_string_get_utf8_size (const ecma_string_t *string_p) /**< ecma-string */
{
lit_utf8_size_t length = ecma_string_get_ascii_size (string_p);
if (length != ECMA_STRING_NO_ASCII_SIZE)
{
return length;
}
if (ECMA_IS_DIRECT_STRING (string_p))
{
JERRY_ASSERT (ECMA_GET_DIRECT_STRING_TYPE (string_p) == ECMA_DIRECT_STRING_MAGIC);
JERRY_ASSERT ((uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p) >= LIT_MAGIC_STRING__COUNT);
uint32_t id = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p) - LIT_MAGIC_STRING__COUNT;
return lit_get_utf8_size_of_cesu8_string (lit_get_magic_string_ex_utf8 (id),
lit_get_magic_string_ex_size (id));
}
if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_HEAP_UTF8_STRING)
{
ecma_short_string_t *short_string_p = (ecma_short_string_t *) string_p;
lit_utf8_size_t size = short_string_p->size;
if (size == short_string_p->length)
{
return size;
}
return lit_get_utf8_size_of_cesu8_string (ECMA_SHORT_STRING_GET_BUFFER (string_p), size);
}
if (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING)
{
ecma_long_string_t *long_string_p = (ecma_long_string_t *) string_p;
if (long_string_p->size == long_string_p->length)
{
return long_string_p->size;
}
return lit_get_utf8_size_of_cesu8_string (long_string_p->string_p, long_string_p->size);
}
JERRY_ASSERT (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_MAGIC_STRING_EX);
lit_magic_string_ex_id_t id = LIT_MAGIC_STRING__COUNT - string_p->u.magic_string_ex_id;
return lit_get_utf8_size_of_cesu8_string (lit_get_magic_string_ex_utf8 (id),
lit_get_magic_string_ex_size (id));
} /* ecma_string_get_utf8_size */
/**
* Get character from specified position in an external ecma-string.
*
* @return character value
*/
static ecma_char_t JERRY_ATTR_NOINLINE
ecma_external_string_get_char_at_pos (lit_utf8_size_t id, /**< id of the external magic string */
lit_utf8_size_t index) /**< index of character */
{
id -= LIT_MAGIC_STRING__COUNT;
const lit_utf8_byte_t *data_p = lit_get_magic_string_ex_utf8 (id);
lit_utf8_size_t size = lit_get_magic_string_ex_size (id);
lit_utf8_size_t length = lit_utf8_string_length (data_p, size);
if (JERRY_LIKELY (size == length))
{
return (ecma_char_t) data_p[index];
}
return lit_utf8_string_code_unit_at (data_p, size, index);
} /* ecma_external_string_get_char_at_pos */
/**
* Get character from specified position in the ecma-string.
*
* @return character value
*/
ecma_char_t
ecma_string_get_char_at_pos (const ecma_string_t *string_p, /**< ecma-string */
lit_utf8_size_t index) /**< index of character */
{
JERRY_ASSERT (index < ecma_string_get_length (string_p));
lit_utf8_byte_t uint32_to_string_buffer[ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32];
if (ECMA_IS_DIRECT_STRING (string_p))
{
switch (ECMA_GET_DIRECT_STRING_TYPE (string_p))
{
case ECMA_DIRECT_STRING_MAGIC:
{
uint32_t id = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
if (JERRY_LIKELY (id < LIT_MAGIC_STRING__COUNT))
{
/* All magic strings must be ascii strings. */
const lit_utf8_byte_t *data_p = lit_get_magic_string_utf8 (id);
return (ecma_char_t) data_p[index];
}
return ecma_external_string_get_char_at_pos (id, index);
}
default:
{
JERRY_ASSERT (ECMA_GET_DIRECT_STRING_TYPE (string_p) == ECMA_DIRECT_STRING_UINT);
uint32_t uint32_number = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
ecma_uint32_to_utf8_string (uint32_number, uint32_to_string_buffer, ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32);
return (ecma_char_t) uint32_to_string_buffer[index];
}
}
}
JERRY_ASSERT (string_p->refs_and_container >= ECMA_STRING_REF_ONE);
switch (ECMA_STRING_GET_CONTAINER (string_p))
{
case ECMA_STRING_CONTAINER_HEAP_UTF8_STRING:
{
ecma_short_string_t *short_string_p = (ecma_short_string_t *) string_p;
lit_utf8_size_t size = short_string_p->size;
const lit_utf8_byte_t *data_p = ECMA_SHORT_STRING_GET_BUFFER (string_p);
if (JERRY_LIKELY (size == short_string_p->length))
{
return (ecma_char_t) data_p[index];
}
return lit_utf8_string_code_unit_at (data_p, size, index);
}
case ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING:
{
ecma_long_string_t *long_string_p = (ecma_long_string_t *) string_p;
lit_utf8_size_t size = long_string_p->size;
const lit_utf8_byte_t *data_p = long_string_p->string_p;
if (JERRY_LIKELY (size == long_string_p->length))
{
return (ecma_char_t) data_p[index];
}
return lit_utf8_string_code_unit_at (data_p, size, index);
}
case ECMA_STRING_CONTAINER_HEAP_ASCII_STRING:
{
const lit_utf8_byte_t *data_p = ECMA_ASCII_STRING_GET_BUFFER (string_p);
return (ecma_char_t) data_p[index];
}
case ECMA_STRING_CONTAINER_UINT32_IN_DESC:
{
ecma_uint32_to_utf8_string (string_p->u.uint32_number,
uint32_to_string_buffer,
ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32);
return (ecma_char_t) uint32_to_string_buffer[index];
}
default:
{
JERRY_ASSERT (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_MAGIC_STRING_EX);
return ecma_external_string_get_char_at_pos (string_p->u.magic_string_ex_id, index);
}
}
} /* ecma_string_get_char_at_pos */
/**
* Check if passed string equals to one of magic strings
* and if equal magic string was found, return it's id in 'out_id_p' argument.
*
* @return id - if magic string equal to passed string was found,
* LIT_MAGIC_STRING__COUNT - otherwise.
*/
lit_magic_string_id_t
ecma_get_string_magic (const ecma_string_t *string_p) /**< ecma-string */
{
if (ECMA_IS_DIRECT_STRING_WITH_TYPE (string_p, ECMA_DIRECT_STRING_MAGIC))
{
uint32_t id = (uint32_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
if (id < LIT_MAGIC_STRING__COUNT)
{
return (lit_magic_string_id_t) id;
}
}
return LIT_MAGIC_STRING__COUNT;
} /* ecma_get_string_magic */
/**
* Try to calculate hash of the ecma-string
*
* @return calculated hash
*/
inline lit_string_hash_t JERRY_ATTR_ALWAYS_INLINE
ecma_string_hash (const ecma_string_t *string_p) /**< ecma-string to calculate hash for */
{
if (ECMA_IS_DIRECT_STRING (string_p))
{
return (lit_string_hash_t) ECMA_GET_DIRECT_STRING_VALUE (string_p);
}
return (lit_string_hash_t) string_p->u.hash;
} /* ecma_string_hash */
/**
* Create a substring from an ecma string
*
* @return a newly consturcted ecma string with its value initialized to a copy of a substring of the first argument
*/
ecma_string_t *
ecma_string_substr (const ecma_string_t *string_p, /**< pointer to an ecma string */
lit_utf8_size_t start_pos, /**< start position, should be less or equal than string length */
lit_utf8_size_t end_pos) /**< end position, should be less or equal than string length */
{
const lit_utf8_size_t string_length = ecma_string_get_length (string_p);
JERRY_ASSERT (start_pos <= string_length);
JERRY_ASSERT (end_pos <= string_length);
if (start_pos >= end_pos)
{
return ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY);
}
ecma_string_t *ecma_string_p = NULL;
end_pos -= start_pos;
ECMA_STRING_TO_UTF8_STRING (string_p, start_p, buffer_size);
if (string_length == buffer_size)
{
ecma_string_p = ecma_new_ecma_string_from_utf8 (start_p + start_pos,
(lit_utf8_size_t) end_pos);
}
else
{
while (start_pos--)
{
start_p += lit_get_unicode_char_size_by_utf8_first_byte (*start_p);
}
const lit_utf8_byte_t *end_p = start_p;
while (end_pos--)
{
end_p += lit_get_unicode_char_size_by_utf8_first_byte (*end_p);
}
ecma_string_p = ecma_new_ecma_string_from_utf8 (start_p, (lit_utf8_size_t) (end_p - start_p));
}
ECMA_FINALIZE_UTF8_STRING (start_p, buffer_size);
return ecma_string_p;
} /* ecma_string_substr */
/**
* Helper function for trimming.
*
* Used by:
* - ecma_string_trim_helper
* - ecma_builtin_global_object_parse_int
* - ecma_builtin_global_object_parse_float
*
* @return position of the first non whitespace character.
*/
const lit_utf8_byte_t *
ecma_string_trim_front (const lit_utf8_byte_t *start_p, /**< current string's start position */
const lit_utf8_byte_t *end_p) /**< current string's end position */
{
ecma_char_t ch;
while (start_p < end_p)
{
lit_utf8_size_t read_size = lit_read_code_unit_from_utf8 (start_p, &ch);
if (!lit_char_is_white_space (ch))
{
break;
}
start_p += read_size;
}
return start_p;
} /* ecma_string_trim_front */
/**
* Helper function for trimming.
*
* Used by:
* - ecma_string_trim_helper
*
* @return position of the last non whitespace character.
*/
const lit_utf8_byte_t *
ecma_string_trim_back (const lit_utf8_byte_t *start_p, /**< current string's start position */
const lit_utf8_byte_t *end_p) /**< current string's end position */
{
ecma_char_t ch;
while (end_p > start_p)
{
lit_utf8_size_t read_size = lit_read_prev_code_unit_from_utf8 (end_p, &ch);
if (!lit_char_is_white_space (ch))
{
break;
}
end_p -= read_size;
}
return end_p;
} /* ecma_string_trim_back */
/**
* Helper function for trimming.
*
* Used by:
* - ecma_string_trim
* - ecma_utf8_string_to_number
*/
inline void JERRY_ATTR_ALWAYS_INLINE
ecma_string_trim_helper (const lit_utf8_byte_t **utf8_str_p, /**< [in, out] current string position */
lit_utf8_size_t *utf8_str_size) /**< [in, out] size of the given string */
{
const lit_utf8_byte_t *end_p = *utf8_str_p + *utf8_str_size;
const lit_utf8_byte_t *start_p = *utf8_str_p;
const lit_utf8_byte_t *new_start_p = ecma_string_trim_front (start_p, end_p);
const lit_utf8_byte_t *new_end_p = ecma_string_trim_back (new_start_p, end_p);
*utf8_str_size = (lit_utf8_size_t) (new_end_p - new_start_p);
*utf8_str_p = new_start_p;
} /* ecma_string_trim_helper */
/**
* Trim leading and trailing whitespace characters from string.
*
* @return trimmed ecma string
*/
ecma_string_t *
ecma_string_trim (const ecma_string_t *string_p) /**< pointer to an ecma string */
{
ecma_string_t *ret_string_p;
lit_utf8_size_t utf8_str_size;
uint8_t flags = ECMA_STRING_FLAG_IS_ASCII;
const lit_utf8_byte_t *utf8_str_p = ecma_string_get_chars (string_p, &utf8_str_size, NULL, NULL, &flags);
if (utf8_str_size > 0)
{
ecma_string_trim_helper (&utf8_str_p, &utf8_str_size);
ret_string_p = ecma_new_ecma_string_from_utf8 (utf8_str_p, utf8_str_size);
}
else
{
ret_string_p = ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY);
}
if (flags & ECMA_STRING_FLAG_MUST_BE_FREED)
{
jmem_heap_free_block ((void *) utf8_str_p, utf8_str_size);
}
return ret_string_p;
} /* ecma_string_trim */
#if ENABLED (JERRY_ESNEXT)
/**
* Pad the beginning or the end of string with parameter given in fill_string to the length of max_length.
*
* @return new string from original, padded with given parameters
*/
ecma_value_t
ecma_string_pad (ecma_value_t original_string_p, /**< Input ecma string */
ecma_value_t max_length, /**< Length to pad to, including original length */
ecma_value_t fill_string, /**< The string to pad with */
bool pad_on_start) /**< true - if we are padding to the start, calling with padStart
false - if we are padding to the end, calling with padEnd */
{
/* 3 */
ecma_length_t int_max_length;
if (ECMA_IS_VALUE_ERROR (ecma_op_to_length (max_length, &int_max_length)))
{
return ECMA_VALUE_ERROR;
}
/* 4 */
ecma_string_t *original_str_val_p = ecma_get_string_from_value (original_string_p);
const uint32_t string_length = ecma_string_get_length (original_str_val_p);
/* 5 */
if (int_max_length <= string_length)
{
ecma_ref_ecma_string (original_str_val_p);
return original_string_p;
}
ecma_string_t *filler_p = ecma_get_magic_string (LIT_MAGIC_STRING_SPACE_CHAR);
/* 6 - 7 */
if (!ecma_is_value_undefined (fill_string))
{
filler_p = ecma_op_to_string (fill_string);
if (filler_p == NULL)
{
return ECMA_VALUE_ERROR;
}
if (ecma_string_is_empty (filler_p))
{
ecma_ref_ecma_string (original_str_val_p);
return original_string_p;
}
}
if (int_max_length >= UINT32_MAX)
{
ecma_deref_ecma_string (filler_p);
return ecma_raise_range_error (ECMA_ERR_MSG ("Maximum string length is reached."));
}
/* 9 */
uint32_t fill_len = (uint32_t) int_max_length - string_length;
/* 10 */
uint32_t filler_length = ecma_string_get_length (filler_p);
uint32_t prepend_count = fill_len / filler_length;
ecma_stringbuilder_t builder = ecma_stringbuilder_create ();
if (!pad_on_start)
{
ecma_stringbuilder_append (&builder, original_str_val_p);
}
for (uint32_t i = 0; i < prepend_count; i++)
{
ecma_stringbuilder_append (&builder, filler_p);
}
lit_utf8_size_t read_size;
ecma_char_t ch;
uint32_t remaining = fill_len - (prepend_count * filler_length);
ECMA_STRING_TO_UTF8_STRING (filler_p, start_p, utf8_str_size);
const lit_utf8_byte_t *temp_start_p = start_p;
while (remaining > 0)
{
read_size = lit_read_code_unit_from_utf8 (temp_start_p, &ch);
ecma_stringbuilder_append_char (&builder, ch);
temp_start_p += read_size;
remaining--;
}
ECMA_FINALIZE_UTF8_STRING (start_p, utf8_str_size);
ecma_deref_ecma_string (filler_p);
/* 11 - 12 */
if (pad_on_start)
{
ecma_stringbuilder_append (&builder, original_str_val_p);
}
return ecma_make_string_value (ecma_stringbuilder_finalize (&builder));
} /* ecma_string_pad */
#endif /* ENABLED (JERRY_ESNEXT) */
/**
* Create an empty string builder
*
* @return new string builder
*/
ecma_stringbuilder_t
ecma_stringbuilder_create (void)
{
const lit_utf8_size_t initial_size = ECMA_ASCII_STRING_HEADER_SIZE;
ecma_stringbuilder_header_t *header_p = (ecma_stringbuilder_header_t *) jmem_heap_alloc_block (initial_size);
header_p->current_size = initial_size;
#if ENABLED (JERRY_MEM_STATS)
jmem_stats_allocate_string_bytes (initial_size);
#endif /* ENABLED (JERRY_MEM_STATS) */
ecma_stringbuilder_t ret = {.header_p = header_p};
return ret;
} /* ecma_stringbuilder_create */
/**
* Create a string builder from an ecma string
*
* @return new string builder
*/
ecma_stringbuilder_t
ecma_stringbuilder_create_from (ecma_string_t *string_p) /**< ecma string */
{
const lit_utf8_size_t string_size = ecma_string_get_size (string_p);
const lit_utf8_size_t initial_size = string_size + ECMA_ASCII_STRING_HEADER_SIZE;
ecma_stringbuilder_header_t *header_p = (ecma_stringbuilder_header_t *) jmem_heap_alloc_block (initial_size);
header_p->current_size = initial_size;
#if ENABLED (JERRY_MEM_STATS)
jmem_stats_allocate_string_bytes (initial_size);
#endif /* ENABLED (JERRY_MEM_STATS) */
size_t copied_size = ecma_string_copy_to_cesu8_buffer (string_p,
ECMA_STRINGBUILDER_STRING_PTR (header_p),
string_size);
JERRY_ASSERT (copied_size == string_size);
ecma_stringbuilder_t ret = {.header_p = header_p};
return ret;
} /* ecma_stringbuilder_create_from */
/**
* Create a string builder from a raw string
*
* @return new string builder
*/
ecma_stringbuilder_t
ecma_stringbuilder_create_raw (const lit_utf8_byte_t *data_p, /**< pointer to data */
const lit_utf8_size_t data_size) /**< size of the data */
{
const lit_utf8_size_t initial_size = data_size + ECMA_ASCII_STRING_HEADER_SIZE;
ecma_stringbuilder_header_t *header_p = (ecma_stringbuilder_header_t *) jmem_heap_alloc_block (initial_size);
header_p->current_size = initial_size;
#if ENABLED (JERRY_MEM_STATS)
jmem_stats_allocate_string_bytes (initial_size);
#endif /* ENABLED (JERRY_MEM_STATS) */
memcpy (ECMA_STRINGBUILDER_STRING_PTR (header_p), data_p, data_size);
ecma_stringbuilder_t ret = {.header_p = header_p};
return ret;
} /* ecma_stringbuilder_create_raw */
/**
* Grow the underlying buffer of a string builder
*
* @return pointer to the end of the data in the underlying buffer
*/
static lit_utf8_byte_t *
ecma_stringbuilder_grow (ecma_stringbuilder_t *builder_p, /**< string builder */
lit_utf8_size_t required_size) /**< required size */
{
ecma_stringbuilder_header_t *header_p = builder_p->header_p;
JERRY_ASSERT (header_p != NULL);
const lit_utf8_size_t new_size = header_p->current_size + required_size;
header_p = jmem_heap_realloc_block (header_p, header_p->current_size, new_size);
header_p->current_size = new_size;
builder_p->header_p = header_p;
#if ENABLED (JERRY_MEM_STATS)
jmem_stats_allocate_string_bytes (required_size);
#endif /* ENABLED (JERRY_MEM_STATS) */
return ((lit_utf8_byte_t *) header_p) + header_p->current_size - required_size;
} /* ecma_stringbuilder_grow */
/**
* Get the current size of the string in a string builder
*
* @return the size of the string data
*/
lit_utf8_size_t
ecma_stringbuilder_get_size (ecma_stringbuilder_t *builder_p) /**< string builder */
{
ecma_stringbuilder_header_t *header_p = builder_p->header_p;
JERRY_ASSERT (header_p != NULL);
return ECMA_STRINGBUILDER_STRING_SIZE (header_p);
} /* ecma_stringbuilder_get_size */
/**
* Get pointer to the raw string data in a string builder
*
* @return pointer to the string data
*/
lit_utf8_byte_t *
ecma_stringbuilder_get_data (ecma_stringbuilder_t *builder_p) /**< string builder */
{
ecma_stringbuilder_header_t *header_p = builder_p->header_p;
JERRY_ASSERT (header_p != NULL);
return ECMA_STRINGBUILDER_STRING_PTR (header_p);
} /* ecma_stringbuilder_get_data */
/**
* Revert the string builder to a smaller size
*/
void
ecma_stringbuilder_revert (ecma_stringbuilder_t *builder_p, /**< string builder */
const lit_utf8_size_t size) /**< new size */
{
ecma_stringbuilder_header_t *header_p = builder_p->header_p;
JERRY_ASSERT (header_p != NULL);
const lit_utf8_size_t new_size = size + ECMA_ASCII_STRING_HEADER_SIZE;
JERRY_ASSERT (new_size <= header_p->current_size);
#if ENABLED (JERRY_MEM_STATS)
jmem_stats_free_string_bytes (header_p->current_size - new_size);
#endif /* ENABLED (JERRY_MEM_STATS) */
header_p = jmem_heap_realloc_block (header_p, header_p->current_size, new_size);
header_p->current_size = new_size;
builder_p->header_p = header_p;
} /* ecma_stringbuilder_revert */
/**
* Append an ecma_string_t to a string builder
*/
void
ecma_stringbuilder_append (ecma_stringbuilder_t *builder_p, /**< string builder */
const ecma_string_t *string_p) /**< ecma string */
{
const lit_utf8_size_t string_size = ecma_string_get_size (string_p);
lit_utf8_byte_t *dest_p = ecma_stringbuilder_grow (builder_p, string_size);
size_t copied_size = ecma_string_copy_to_cesu8_buffer (string_p,
dest_p,
string_size);
JERRY_ASSERT (copied_size == string_size);
} /* ecma_stringbuilder_append */
/**
* Append a magic string to a string builder
*/
void
ecma_stringbuilder_append_magic (ecma_stringbuilder_t *builder_p, /**< string builder */
const lit_magic_string_id_t id) /**< magic string id */
{
const lit_utf8_size_t string_size = lit_get_magic_string_size (id);
lit_utf8_byte_t *dest_p = ecma_stringbuilder_grow (builder_p, string_size);
const lit_utf8_byte_t *string_data_p = lit_get_magic_string_utf8 (id);
memcpy (dest_p, string_data_p, string_size);
} /* ecma_stringbuilder_append_magic */
/**
* Append raw string data to a string builder
*/
void
ecma_stringbuilder_append_raw (ecma_stringbuilder_t *builder_p, /**< string builder */
const lit_utf8_byte_t *data_p, /**< pointer to data */
const lit_utf8_size_t data_size) /**< size of the data */
{
lit_utf8_byte_t *dest_p = ecma_stringbuilder_grow (builder_p, data_size);
memcpy (dest_p, data_p, data_size);
} /* ecma_stringbuilder_append_raw */
/**
* Append a codepoint to a string builder
*/
void
ecma_stringbuilder_append_codepoint (ecma_stringbuilder_t *builder_p, /**< string builder */
lit_code_point_t cp) /**< code point */
{
const lit_utf8_size_t size = (lit_utf8_size_t) lit_code_point_get_cesu8_length (cp);
lit_utf8_byte_t *dest_p = ecma_stringbuilder_grow (builder_p, size);
lit_code_point_to_cesu8_bytes (dest_p, cp);
} /* ecma_stringbuilder_append_codepoint */
/**
* Append an ecma_char_t to a string builder
*/
void
ecma_stringbuilder_append_char (ecma_stringbuilder_t *builder_p, /**< string builder */
const ecma_char_t c) /**< ecma char */
{
ecma_stringbuilder_append_codepoint (builder_p, c);
} /* ecma_stringbuilder_append_char */
/**
* Append a single byte to a string builder
*/
void
ecma_stringbuilder_append_byte (ecma_stringbuilder_t *builder_p, /**< string builder */
const lit_utf8_byte_t byte) /**< byte */
{
lit_utf8_byte_t *dest_p = ecma_stringbuilder_grow (builder_p, 1);
*dest_p = byte;
} /* ecma_stringbuilder_append_byte */
/**
* Finalize a string builder, returning the created string, and releasing the underlying buffer.
*
* Note:
* The builder should no longer be used.
*
* @return the created string
*/
ecma_string_t *
ecma_stringbuilder_finalize (ecma_stringbuilder_t *builder_p) /**< string builder */
{
ecma_stringbuilder_header_t *header_p = builder_p->header_p;
JERRY_ASSERT (header_p != NULL);
const lit_utf8_size_t string_size = ECMA_STRINGBUILDER_STRING_SIZE (header_p);
lit_utf8_byte_t *string_begin_p = ECMA_STRINGBUILDER_STRING_PTR (header_p);
ecma_string_t *string_p = ecma_find_special_string (string_begin_p, string_size);
if (JERRY_UNLIKELY (string_p != NULL))
{
ecma_stringbuilder_destroy (builder_p);
return string_p;
}
#ifndef JERRY_NDEBUG
builder_p->header_p = NULL;
#endif
size_t container_size = sizeof (ecma_short_string_t);
const lit_string_hash_t hash = lit_utf8_string_calc_hash (string_begin_p, string_size);
const lit_utf8_size_t length = lit_utf8_string_length (string_begin_p, string_size);
if (JERRY_LIKELY (string_size <= UINT16_MAX))
{
if (JERRY_LIKELY (length == string_size) && string_size <= (UINT8_MAX + 1))
{
string_p = (ecma_string_t *) header_p;
string_p->refs_and_container = ECMA_STRING_CONTAINER_HEAP_ASCII_STRING | ECMA_STRING_REF_ONE;
string_p->u.hash = hash;
ECMA_ASCII_STRING_SET_SIZE (string_p, string_size);
return (ecma_string_t *) string_p;
}
}
else
{
container_size = sizeof (ecma_long_string_t);
}
const size_t utf8_string_size = string_size + container_size;
header_p = jmem_heap_realloc_block (header_p, header_p->current_size, utf8_string_size);
memmove (((lit_utf8_byte_t *) header_p + container_size),
ECMA_STRINGBUILDER_STRING_PTR (header_p),
string_size);
#if ENABLED (JERRY_MEM_STATS)
jmem_stats_allocate_string_bytes (container_size - ECMA_ASCII_STRING_HEADER_SIZE);
#endif /* ENABLED (JERRY_MEM_STATS) */
if (JERRY_LIKELY (string_size <= UINT16_MAX))
{
ecma_short_string_t *short_string_p = (ecma_short_string_t *) header_p;
short_string_p->header.refs_and_container = ECMA_STRING_CONTAINER_HEAP_UTF8_STRING | ECMA_STRING_REF_ONE;
short_string_p->header.u.hash = hash;
short_string_p->size = (uint16_t) string_size;
short_string_p->length = (uint16_t) length;
return (ecma_string_t *) short_string_p;
}
ecma_long_string_t *long_string_p = (ecma_long_string_t *) header_p;
long_string_p->header.refs_and_container = ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING | ECMA_STRING_REF_ONE;
long_string_p->header.u.hash = hash;
long_string_p->string_p = ECMA_LONG_STRING_BUFFER_START (long_string_p);
long_string_p->size = string_size;
long_string_p->length = length;
return (ecma_string_t *) long_string_p;
} /* ecma_stringbuilder_finalize */
/**
* Destroy a string builder that is no longer needed without creating a string from the contents.
*/
void
ecma_stringbuilder_destroy (ecma_stringbuilder_t *builder_p) /**< string builder */
{
JERRY_ASSERT (builder_p->header_p != NULL);
const lit_utf8_size_t size = builder_p->header_p->current_size;
jmem_heap_free_block (builder_p->header_p, size);
#ifndef JERRY_NDEBUG
builder_p->header_p = NULL;
#endif
#if ENABLED (JERRY_MEM_STATS)
jmem_stats_free_string_bytes (size);
#endif /* ENABLED (JERRY_MEM_STATS) */
} /* ecma_stringbuilder_destroy */
#if ENABLED (JERRY_ESNEXT)
/**
* AdvanceStringIndex operation
*
* See also:
* ECMA-262 v6.0, 21.2.5.2.3
*
* @return uint32_t - the proper character index based on the operation
*/
ecma_length_t
ecma_op_advance_string_index (ecma_string_t *str_p, /**< input string */
ecma_length_t index, /**< given character index */
bool is_unicode) /**< true - if regexp object's "unicode" flag is set
false - otherwise */
{
JERRY_ASSERT (index <= ECMA_NUMBER_MAX_SAFE_INTEGER);
ecma_length_t next_index = index + 1;
if (!is_unicode)
{
return next_index;
}
lit_utf8_size_t str_len = ecma_string_get_length (str_p);
if (next_index >= str_len)
{
return next_index;
}
JERRY_ASSERT (index < UINT32_MAX);
ecma_char_t first = ecma_string_get_char_at_pos (str_p, (lit_utf8_size_t) index);
if (!lit_is_code_point_utf16_high_surrogate (first))
{
return next_index;
}
ecma_char_t second = ecma_string_get_char_at_pos (str_p, (lit_utf8_size_t) next_index);
if (!lit_is_code_point_utf16_low_surrogate (second))
{
return next_index;
}
return next_index + 1;
} /* ecma_op_advance_string_index */
#endif /* ENABLED (JERRY_ESNEXT) */
/**
* @}
* @}
*/
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