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Implementing ecma_compare_ecma_string_to_ecma_string helper.

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This commit is contained in:
Ruben Ayrapetyan 2014-08-12 16:56:35 +04:00
parent b987bcc920
commit 8bde4ecbf2
1 changed files with 46 additions and 2 deletions
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48
src/libecmaobjects/ecma-helpers.c
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@ -622,7 +622,7 @@ ecma_duplicate_ecma_string (ecma_array_first_chunk_t *first_chunk_p) /**< first
} /* ecma_duplicate_ecma_string */
/**
* Compare zero-terminated string to ecma-string
* Compare ecma-string to ecma-string
*
* @return true - if strings are equal;
* false - otherwise.
@ -631,7 +631,51 @@ bool
ecma_compare_ecma_string_to_ecma_string (const ecma_array_first_chunk_t *string1_p, /* ecma-string */
const ecma_array_first_chunk_t *string2_p) /* ecma-string */
{
JERRY_UNIMPLEMENTED_REF_UNUSED_VARS(string1_p, string2_p);
JERRY_ASSERT (string1_p != NULL && string2_p != NULL);
if (string1_p->header.unit_number != string2_p->header.unit_number)
{
return false;
}
ecma_length_t chars_left = string1_p->header.unit_number;
JERRY_STATIC_ASSERT (ECMA_POINTER_FIELD_WIDTH <= sizeof (uint16_t) * JERRY_BITSINBYTE);
const uint16_t *next_chunk_compressed_pointer_1_p = &string1_p->header.next_chunk_p;
const uint16_t *next_chunk_compressed_pointer_2_p = &string2_p->header.next_chunk_p;
const ecma_char_t *cur_char_array_1_p = string1_p->data;
const ecma_char_t *cur_char_array_1_end_p = string1_p->data + sizeof (string1_p->data);
const ecma_char_t *cur_char_array_2_p = string2_p->data;
const ecma_char_t *cur_char_array_2_end_p = string2_p->data + sizeof (string2_p->data);
while (chars_left > 0)
{
if (cur_char_array_1_p != cur_char_array_1_end_p)
{
JERRY_ASSERT (cur_char_array_2_p < cur_char_array_2_end_p);
if (*cur_char_array_1_p++ != *cur_char_array_2_p++)
{
return false;
}
chars_left--;
}
else
{
ecma_array_non_first_chunk_t *non_first_chunk_1_p = ECMA_GET_POINTER (*next_chunk_compressed_pointer_1_p);
ecma_array_non_first_chunk_t *non_first_chunk_2_p = ECMA_GET_POINTER (*next_chunk_compressed_pointer_2_p);
JERRY_ASSERT (non_first_chunk_1_p != NULL && non_first_chunk_2_p != NULL);
cur_char_array_1_p = non_first_chunk_1_p->data;
cur_char_array_1_end_p = non_first_chunk_1_p->data + sizeof (non_first_chunk_1_p->data);
cur_char_array_2_p = non_first_chunk_2_p->data;
cur_char_array_2_end_p = non_first_chunk_2_p->data + sizeof (non_first_chunk_2_p->data);
}
}
return true;
} /* ecma_compare_ecma_string_to_ecma_string */
/**