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Optimize string concatenation. (#2141)

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This patch adds two new string concatenation functions:
ecma_append_chars_to_string and ecma_append_magic_string_to_string

The former appends a cesu8 byte array and the latter appends a magic string
to the end of an ecma-string. These two free (dereference) their ecma-string
argument, and this change is also applied to the original ecma_concat_ecma_strings
function which simplifies string handling in most cases.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2017-12-19 13:45:48 +01:00
committed by GitHub
parent bd574956e3
commit a2d3ea61eb
16 changed files with 369 additions and 555 deletions
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jerry-core/ecma/base/ecma-helpers.h
+5
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@@ -173,7 +173,12 @@ ecma_string_t *ecma_new_ecma_string_from_number (ecma_number_t num);
ecma_string_t *ecma_new_ecma_string_from_magic_string_id (lit_magic_string_id_t id);
ecma_string_t *ecma_new_ecma_string_from_magic_string_ex_id (lit_magic_string_ex_id_t id);
ecma_string_t *ecma_new_ecma_length_string (void);
ecma_string_t *ecma_append_chars_to_string (ecma_string_t *string1_p,
const lit_utf8_byte_t *cesu8_string2_p,
lit_utf8_size_t cesu8_string2_size,
lit_utf8_size_t cesu8_string2_length);
ecma_string_t *ecma_concat_ecma_strings (ecma_string_t *string1_p, ecma_string_t *string2_p);
ecma_string_t *ecma_append_magic_string_to_string (ecma_string_t *string1_p, lit_magic_string_id_t string2_id);
void ecma_ref_ecma_string (ecma_string_t *string_p);
void ecma_deref_ecma_string (ecma_string_t *string_p);
ecma_number_t ecma_string_to_number (const ecma_string_t *str_p);