/* 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. */ #ifndef LIT_STRINGS_H #define LIT_STRINGS_H #include "jrt.h" #include "lit-globals.h" /** * Null character (used in few cases as utf-8 string end marker) */ #define LIT_BYTE_NULL (0) /** * For the formal definition of Unicode transformation formats (UTF) see Section 3.9, Unicode Encoding Forms in The * Unicode Standard (http://www.unicode.org/versions/Unicode3.0.0/ch03.pdf#G7404). */ #define LIT_UNICODE_CODE_POINT_NULL (0x0) #define LIT_UNICODE_CODE_POINT_MAX (0x10FFFF) #define LIT_UTF16_CODE_UNIT_MAX (0xFFFF) #define LIT_UTF16_FIRST_SURROGATE_CODE_POINT (0x10000) #define LIT_UTF16_LOW_SURROGATE_MARKER (0xDC00) #define LIT_UTF16_HIGH_SURROGATE_MARKER (0xD800) #define LIT_UTF16_HIGH_SURROGATE_MIN (0xD800) #define LIT_UTF16_HIGH_SURROGATE_MAX (0xDBFF) #define LIT_UTF16_LOW_SURROGATE_MIN (0xDC00) #define LIT_UTF16_LOW_SURROGATE_MAX (0xDFFF) #define LIT_UTF16_BITS_IN_SURROGATE (10) #define LIT_UTF16_LAST_10_BITS_MASK (0x3FF) #define LIT_UTF8_1_BYTE_MARKER (0x00) #define LIT_UTF8_2_BYTE_MARKER (0xC0) #define LIT_UTF8_3_BYTE_MARKER (0xE0) #define LIT_UTF8_4_BYTE_MARKER (0xF0) #define LIT_UTF8_5_BYTE_MARKER (0xF8) #define LIT_UTF8_EXTRA_BYTE_MARKER (0x80) #define LIT_UTF8_1_BYTE_MASK (0x80) #define LIT_UTF8_2_BYTE_MASK (0xE0) #define LIT_UTF8_3_BYTE_MASK (0xF0) #define LIT_UTF8_4_BYTE_MASK (0xF8) #define LIT_UTF8_EXTRA_BYTE_MASK (0xC0) #define LIT_UTF8_LAST_7_BITS_MASK (0x7F) #define LIT_UTF8_LAST_6_BITS_MASK (0x3F) #define LIT_UTF8_LAST_5_BITS_MASK (0x1F) #define LIT_UTF8_LAST_4_BITS_MASK (0x0F) #define LIT_UTF8_LAST_3_BITS_MASK (0x07) #define LIT_UTF8_LAST_2_BITS_MASK (0x03) #define LIT_UTF8_LAST_1_BIT_MASK (0x01) #define LIT_UTF8_BITS_IN_EXTRA_BYTES (6) #define LIT_UTF8_1_BYTE_CODE_POINT_MAX (0x7F) #define LIT_UTF8_2_BYTE_CODE_POINT_MIN (0x80) #define LIT_UTF8_2_BYTE_CODE_POINT_MAX (0x7FF) #define LIT_UTF8_3_BYTE_CODE_POINT_MIN (0x800) #define LIT_UTF8_3_BYTE_CODE_POINT_MAX (LIT_UTF16_CODE_UNIT_MAX) #define LIT_UTF8_4_BYTE_CODE_POINT_MIN (0x10000) #define LIT_UTF8_4_BYTE_CODE_POINT_MAX (LIT_UNICODE_CODE_POINT_MAX) /** * Differnce between byte count needed to represent code point greater than 0xFFFF * in common UTF-8 (4 bytes required) and CESU-8 (6 bytes required) */ #define LIT_UTF8_CESU8_SURROGATE_SIZE_DIF (2 * LIT_UTF8_MAX_BYTES_IN_CODE_UNIT - LIT_UTF8_MAX_BYTES_IN_CODE_POINT) /** * Byte values >= LIT_UTF8_FIRST_BYTE_MAX are not allowed in internal strings */ #define LIT_UTF8_FIRST_BYTE_MAX LIT_UTF8_5_BYTE_MARKER /* validation */ bool lit_is_valid_utf8_string (const lit_utf8_byte_t *utf8_buf_p, lit_utf8_size_t buf_size); bool lit_is_valid_cesu8_string (const lit_utf8_byte_t *cesu8_buf_p, lit_utf8_size_t buf_size); /* checks */ bool lit_is_code_point_utf16_low_surrogate (lit_code_point_t code_point); bool lit_is_code_point_utf16_high_surrogate (lit_code_point_t code_point); /* size */ lit_utf8_size_t lit_zt_utf8_string_size (const lit_utf8_byte_t *utf8_str_p); lit_utf8_size_t lit_get_utf8_size_of_cesu8_string (const lit_utf8_byte_t *cesu8_buf_p, lit_utf8_size_t cesu8_buf_size); /* length */ ecma_length_t lit_utf8_string_length (const lit_utf8_byte_t *utf8_buf_p, lit_utf8_size_t utf8_buf_size); ecma_length_t lit_get_utf8_length_of_cesu8_string (const lit_utf8_byte_t *cesu8_buf_p, lit_utf8_size_t cesu8_buf_size); /* hash */ lit_string_hash_t lit_utf8_string_calc_hash (const lit_utf8_byte_t *utf8_buf_p, lit_utf8_size_t utf8_buf_size); lit_string_hash_t lit_utf8_string_hash_combine (lit_string_hash_t hash_basis, const lit_utf8_byte_t *utf8_buf_p, lit_utf8_size_t utf8_buf_size); /* code unit access */ ecma_char_t lit_utf8_string_code_unit_at (const lit_utf8_byte_t *utf8_buf_p, lit_utf8_size_t utf8_buf_size, ecma_length_t code_unit_offset); lit_utf8_size_t lit_get_unicode_char_size_by_utf8_first_byte (const lit_utf8_byte_t first_byte); /* conversion */ lit_utf8_size_t lit_code_unit_to_utf8 (ecma_char_t code_unit, lit_utf8_byte_t *buf_p); lit_utf8_size_t lit_code_point_to_utf8 (lit_code_point_t code_point, lit_utf8_byte_t *buf); lit_utf8_size_t lit_code_point_to_cesu8 (lit_code_point_t code_point, lit_utf8_byte_t *buf); lit_utf8_size_t lit_convert_cesu8_string_to_utf8_string (const lit_utf8_byte_t *cesu8_string, lit_utf8_size_t cesu8_size, lit_utf8_byte_t *utf8_string, lit_utf8_size_t utf8_size); lit_code_point_t lit_convert_surrogate_pair_to_code_point (ecma_char_t high_surrogate, ecma_char_t low_surrogate); bool lit_compare_utf8_strings_relational (const lit_utf8_byte_t *string1_p, lit_utf8_size_t string1_size, const lit_utf8_byte_t *string2_p, lit_utf8_size_t string2_size); /* read code point from buffer */ lit_utf8_size_t lit_read_code_point_from_utf8 (const lit_utf8_byte_t *buf_p, lit_utf8_size_t buf_size, lit_code_point_t *code_point); lit_utf8_size_t lit_read_code_unit_from_utf8 (const lit_utf8_byte_t *buf_p, ecma_char_t *code_point); lit_utf8_size_t lit_read_prev_code_unit_from_utf8 (const lit_utf8_byte_t *buf_p, ecma_char_t *code_point); ecma_char_t lit_utf8_read_next (const lit_utf8_byte_t **buf_p); ecma_char_t lit_utf8_read_prev (const lit_utf8_byte_t **buf_p); ecma_char_t lit_utf8_peek_next (const lit_utf8_byte_t *buf_p); ecma_char_t lit_utf8_peek_prev (const lit_utf8_byte_t *buf_p); void lit_utf8_incr (const lit_utf8_byte_t **buf_p); void lit_utf8_decr (const lit_utf8_byte_t **buf_p); #endif /* !LIT_STRINGS_H */