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Add an API function to calculate the UTF-8 encoded string size from Jerry string. (#1450)

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JerryScript-DCO-1.0-Signed-off-by: Robert Sipka rsipka.uszeged@partner.samsung.com
This commit is contained in:
Robert Sipka
2016-11-29 12:25:18 +01:00
committed by GitHub
parent 6a2f54456f
commit 0467239d03
8 changed files with 189 additions and 11 deletions
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jerry-core/ecma/base/ecma-helpers-string.c
+49
View File
@@ -1513,6 +1513,55 @@ ecma_string_get_size (const ecma_string_t *string_p) /**< ecma-string */
}
} /* 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 */
{
switch (ECMA_STRING_GET_CONTAINER (string_p))
{
case ECMA_STRING_CONTAINER_HEAP_UTF8_STRING:
{
if (string_p->u.utf8_string.size == (lit_utf8_size_t) string_p->u.utf8_string.length)
{
return (lit_utf8_size_t) string_p->u.utf8_string.size;
}
return lit_get_utf8_size_of_cesu8_string ((const lit_utf8_byte_t *) (string_p + 1),
(lit_utf8_size_t) string_p->u.utf8_string.size);
}
case ECMA_STRING_CONTAINER_HEAP_LONG_UTF8_STRING:
{
ecma_long_string_t *long_string_p = (ecma_long_string_t *) string_p;
if (string_p->u.long_utf8_string_size == (lit_utf8_size_t) long_string_p->long_utf8_string_length)
{
return (lit_utf8_size_t) string_p->u.long_utf8_string_size;
}
return lit_get_utf8_size_of_cesu8_string ((const lit_utf8_byte_t *) (string_p + 1),
(lit_utf8_size_t) string_p->u.long_utf8_string_size);
}
case ECMA_STRING_CONTAINER_UINT32_IN_DESC:
{
return (lit_utf8_size_t) ecma_string_get_number_in_desc_size (string_p->u.uint32_number);
}
case ECMA_STRING_CONTAINER_MAGIC_STRING:
{
return lit_get_magic_string_size (string_p->u.magic_string_id);
}
default:
{
JERRY_ASSERT (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_MAGIC_STRING_EX);
return lit_get_utf8_size_of_cesu8_string (lit_get_magic_string_ex_utf8 (string_p->u.magic_string_ex_id),
lit_get_magic_string_ex_size (string_p->u.magic_string_ex_id));
}
}
} /* ecma_string_get_utf8_size */
/**
* Get character from specified position in the ecma-string.
*
jerry-core/ecma/base/ecma-helpers.h
+1
View File
@@ -196,6 +196,7 @@ extern bool ecma_compare_ecma_strings (const ecma_string_t *, const ecma_string_
extern bool ecma_compare_ecma_strings_relational (const ecma_string_t *, const ecma_string_t *);
extern ecma_length_t ecma_string_get_length (const ecma_string_t *);
extern lit_utf8_size_t ecma_string_get_size (const ecma_string_t *);
extern lit_utf8_size_t ecma_string_get_utf8_size (const ecma_string_t *);
extern ecma_char_t ecma_string_get_char_at_pos (const ecma_string_t *, ecma_length_t);
extern ecma_string_t *ecma_get_magic_string (lit_magic_string_id_t);