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Implement external strings. (#4028)

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JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2020-07-22 12:27:12 +02:00
committed by GitHub
parent 04f0a7a670
commit 0124368ae7
9 changed files with 504 additions and 122 deletions
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jerry-core/ecma/base/ecma-globals.h
+31 -23
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@@ -1526,14 +1526,12 @@ typedef enum
{
ECMA_STRING_CONTAINER_HEAP_UTF8_STRING, /**< actual data is on the heap as an utf-8 (cesu8) string
* maximum size is 2^16. */
ECMA_STRING_CONTAINER_HEAP_LONG_UTF8_STRING, /**< actual data is on the heap as an utf-8 (cesu8) string
* maximum size is 2^32. */
ECMA_STRING_CONTAINER_UINT32_IN_DESC, /**< actual data is UInt32-represeneted Number
stored locally in the string's descriptor */
ECMA_STRING_CONTAINER_LONG_OR_EXTERNAL_STRING, /**< the string is a long string or provided externally
* and only its attributes are stored. */
ECMA_STRING_CONTAINER_UINT32_IN_DESC, /**< string representation of an uint32 number */
ECMA_STRING_CONTAINER_HEAP_ASCII_STRING, /**< actual data is on the heap as an ASCII string
* maximum size is 2^16. */
ECMA_STRING_CONTAINER_MAGIC_STRING_EX, /**< the ecma-string is equal to one of external magic strings */
ECMA_STRING_CONTAINER_SYMBOL, /**< the ecma-string is a symbol */
ECMA_STRING_CONTAINER__MAX = ECMA_STRING_CONTAINER_SYMBOL /**< maximum value */
@@ -1611,43 +1609,53 @@ typedef struct
uint16_t size; /**< size of this ASCII string in bytes */
} ecma_ascii_string_t;
/**
* ECMA long UTF8 string-value descriptor
*/
typedef struct
{
ecma_string_t header; /**< string header */
uint16_t size; /**< size of this utf-8 string in bytes */
uint16_t length; /**< length of this utf-8 string in bytes */
} ecma_utf8_string_t;
/**
* ECMA UTF8 string-value descriptor
*/
typedef struct
{
ecma_string_t header; /**< string header */
lit_utf8_size_t size; /**< size of this long utf-8 string in bytes */
lit_utf8_size_t length; /**< length of this long utf-8 string in bytes */
} ecma_long_utf8_string_t;
uint16_t size; /**< size of this utf-8 string in bytes */
uint16_t length; /**< length of this utf-8 string in characters */
} ecma_utf8_string_t;
/**
* Long or external CESU8 string-value descriptor
*/
typedef struct
{
ecma_string_t header; /**< string header */
const lit_utf8_byte_t *string_p; /**< string data */
lit_utf8_size_t size; /**< size of this external string in bytes */
lit_utf8_size_t length; /**< length of this external string in characters */
} ecma_long_string_t;
/**
* External UTF8 string-value descriptor
*/
typedef struct
{
ecma_long_string_t header;
ecma_object_native_free_callback_t free_cb; /**< free callback */
} ecma_external_string_t;
/**
* Get the start position of the string buffer of an ecma ASCII string
*/
#define ECMA_ASCII_STRING_GET_BUFFER(string_p) \
((lit_utf8_byte_t *) ((lit_utf8_byte_t *) (string_p) + sizeof (ecma_ascii_string_t)))
((lit_utf8_byte_t *) ((lit_utf8_byte_t *) (string_p) + sizeof (ecma_ascii_string_t)))
/**
* Get the start position of the string buffer of an ecma UTF8 string
*/
#define ECMA_UTF8_STRING_GET_BUFFER(string_p) \
((lit_utf8_byte_t *) ((lit_utf8_byte_t *) (string_p) + sizeof (ecma_utf8_string_t)))
((lit_utf8_byte_t *) ((lit_utf8_byte_t *) (string_p) + sizeof (ecma_utf8_string_t)))
/**
* Get the start position of the string buffer of an ecma long UTF8 string
* Get the start position of the string buffer of an ecma long CESU8 string
*/
#define ECMA_LONG_UTF8_STRING_GET_BUFFER(string_p) \
((lit_utf8_byte_t *) ((lit_utf8_byte_t *) (string_p) + sizeof (ecma_long_utf8_string_t)))
#define ECMA_LONG_STRING_BUFFER_START(string_p) \
((lit_utf8_byte_t *) ((lit_utf8_byte_t *) (string_p) + sizeof (ecma_long_string_t)))
/**
* ECMA extended string-value descriptor