/*
 *  Unicode helpers
 */

#if !defined(DUK_UNICODE_H_INCLUDED)
#define DUK_UNICODE_H_INCLUDED

/*
 *  UTF-8 / XUTF-8 / CESU-8 constants
 */

#define DUK_UNICODE_MAX_XUTF8_LENGTH      7   /* up to 36 bit codepoints */
#define DUK_UNICODE_MAX_XUTF8_BMP_LENGTH  3   /* all codepoints up to U+FFFF */
#define DUK_UNICODE_MAX_CESU8_LENGTH      6   /* all codepoints up to U+10FFFF */
#define DUK_UNICODE_MAX_CESU8_BMP_LENGTH  3   /* all codepoints up to U+FFFF */

/*
 *  Useful Unicode codepoints
 *
 *  Integer constants must be signed to avoid unexpected coercions
 *  in comparisons.
 */

#define DUK_UNICODE_CP_ZWNJ                   0x200cL  /* zero-width non-joiner */
#define DUK_UNICODE_CP_ZWJ                    0x200dL  /* zero-width joiner */
#define DUK_UNICODE_CP_REPLACEMENT_CHARACTER  0xfffdL  /* http://en.wikipedia.org/wiki/Replacement_character#Replacement_character */

/*
 *  ASCII character constants
 *
 *  C character literals like 'x' have a platform specific value and do
 *  not match ASCII (UTF-8) values on e.g. EBCDIC platforms.  So, use
 *  these (admittedly awkward) constants instead.  These constants must
 *  also have signed values to avoid unexpected coercions in comparisons.
 *
 *  http://en.wikipedia.org/wiki/ASCII
 */

#define DUK_ASC_NUL              0x00
#define DUK_ASC_SOH              0x01
#define DUK_ASC_STX              0x02
#define DUK_ASC_ETX              0x03
#define DUK_ASC_EOT              0x04
#define DUK_ASC_ENQ              0x05
#define DUK_ASC_ACK              0x06
#define DUK_ASC_BEL              0x07
#define DUK_ASC_BS               0x08
#define DUK_ASC_HT               0x09
#define DUK_ASC_LF               0x0a
#define DUK_ASC_VT               0x0b
#define DUK_ASC_FF               0x0c
#define DUK_ASC_CR               0x0d
#define DUK_ASC_SO               0x0e
#define DUK_ASC_SI               0x0f
#define DUK_ASC_DLE              0x10
#define DUK_ASC_DC1              0x11
#define DUK_ASC_DC2              0x12
#define DUK_ASC_DC3              0x13
#define DUK_ASC_DC4              0x14
#define DUK_ASC_NAK              0x15
#define DUK_ASC_SYN              0x16
#define DUK_ASC_ETB              0x17
#define DUK_ASC_CAN              0x18
#define DUK_ASC_EM               0x19
#define DUK_ASC_SUB              0x1a
#define DUK_ASC_ESC              0x1b
#define DUK_ASC_FS               0x1c
#define DUK_ASC_GS               0x1d
#define DUK_ASC_RS               0x1e
#define DUK_ASC_US               0x1f
#define DUK_ASC_SPACE            0x20
#define DUK_ASC_EXCLAMATION      0x21
#define DUK_ASC_DOUBLEQUOTE      0x22
#define DUK_ASC_HASH             0x23
#define DUK_ASC_DOLLAR           0x24
#define DUK_ASC_PERCENT          0x25
#define DUK_ASC_AMP              0x26
#define DUK_ASC_SINGLEQUOTE      0x27
#define DUK_ASC_LPAREN           0x28
#define DUK_ASC_RPAREN           0x29
#define DUK_ASC_STAR             0x2a
#define DUK_ASC_PLUS             0x2b
#define DUK_ASC_COMMA            0x2c
#define DUK_ASC_MINUS            0x2d
#define DUK_ASC_PERIOD           0x2e
#define DUK_ASC_SLASH            0x2f
#define DUK_ASC_0                0x30
#define DUK_ASC_1                0x31
#define DUK_ASC_2                0x32
#define DUK_ASC_3                0x33
#define DUK_ASC_4                0x34
#define DUK_ASC_5                0x35
#define DUK_ASC_6                0x36
#define DUK_ASC_7                0x37
#define DUK_ASC_8                0x38
#define DUK_ASC_9                0x39
#define DUK_ASC_COLON            0x3a
#define DUK_ASC_SEMICOLON        0x3b
#define DUK_ASC_LANGLE           0x3c
#define DUK_ASC_EQUALS           0x3d
#define DUK_ASC_RANGLE           0x3e
#define DUK_ASC_QUESTION         0x3f
#define DUK_ASC_ATSIGN           0x40
#define DUK_ASC_UC_A             0x41
#define DUK_ASC_UC_B             0x42
#define DUK_ASC_UC_C             0x43
#define DUK_ASC_UC_D             0x44
#define DUK_ASC_UC_E             0x45
#define DUK_ASC_UC_F             0x46
#define DUK_ASC_UC_G             0x47
#define DUK_ASC_UC_H             0x48
#define DUK_ASC_UC_I             0x49
#define DUK_ASC_UC_J             0x4a
#define DUK_ASC_UC_K             0x4b
#define DUK_ASC_UC_L             0x4c
#define DUK_ASC_UC_M             0x4d
#define DUK_ASC_UC_N             0x4e
#define DUK_ASC_UC_O             0x4f
#define DUK_ASC_UC_P             0x50
#define DUK_ASC_UC_Q             0x51
#define DUK_ASC_UC_R             0x52
#define DUK_ASC_UC_S             0x53
#define DUK_ASC_UC_T             0x54
#define DUK_ASC_UC_U             0x55
#define DUK_ASC_UC_V             0x56
#define DUK_ASC_UC_W             0x57
#define DUK_ASC_UC_X             0x58
#define DUK_ASC_UC_Y             0x59
#define DUK_ASC_UC_Z             0x5a
#define DUK_ASC_LBRACKET         0x5b
#define DUK_ASC_BACKSLASH        0x5c
#define DUK_ASC_RBRACKET         0x5d
#define DUK_ASC_CARET            0x5e
#define DUK_ASC_UNDERSCORE       0x5f
#define DUK_ASC_GRAVE            0x60
#define DUK_ASC_LC_A             0x61
#define DUK_ASC_LC_B             0x62
#define DUK_ASC_LC_C             0x63
#define DUK_ASC_LC_D             0x64
#define DUK_ASC_LC_E             0x65
#define DUK_ASC_LC_F             0x66
#define DUK_ASC_LC_G             0x67
#define DUK_ASC_LC_H             0x68
#define DUK_ASC_LC_I             0x69
#define DUK_ASC_LC_J             0x6a
#define DUK_ASC_LC_K             0x6b
#define DUK_ASC_LC_L             0x6c
#define DUK_ASC_LC_M             0x6d
#define DUK_ASC_LC_N             0x6e
#define DUK_ASC_LC_O             0x6f
#define DUK_ASC_LC_P             0x70
#define DUK_ASC_LC_Q             0x71
#define DUK_ASC_LC_R             0x72
#define DUK_ASC_LC_S             0x73
#define DUK_ASC_LC_T             0x74
#define DUK_ASC_LC_U             0x75
#define DUK_ASC_LC_V             0x76
#define DUK_ASC_LC_W             0x77
#define DUK_ASC_LC_X             0x78
#define DUK_ASC_LC_Y             0x79
#define DUK_ASC_LC_Z             0x7a
#define DUK_ASC_LCURLY           0x7b
#define DUK_ASC_PIPE             0x7c
#define DUK_ASC_RCURLY           0x7d
#define DUK_ASC_TILDE            0x7e
#define DUK_ASC_DEL              0x7f

/*
 *  Miscellaneous
 */

/* Uppercase A is 0x41, lowercase a is 0x61; OR 0x20 to convert uppercase
 * to lowercase.
 */
#define DUK_LOWERCASE_CHAR_ASCII(x)  ((x) | 0x20)

/*
 *  Unicode tables
 */

#if defined(DUK_USE_SOURCE_NONBMP)
#include "duk_unicode_ids_noa.h"
#else
#include "duk_unicode_ids_noabmp.h"
#endif

#if defined(DUK_USE_SOURCE_NONBMP)
#include "duk_unicode_ids_m_let_noa.h"
#else
#include "duk_unicode_ids_m_let_noabmp.h"
#endif

#if defined(DUK_USE_SOURCE_NONBMP)
#include "duk_unicode_idp_m_ids_noa.h"
#else
#include "duk_unicode_idp_m_ids_noabmp.h"
#endif

#include "duk_unicode_caseconv.h"

#if defined(DUK_USE_REGEXP_CANON_WORKAROUND)
#include "duk_unicode_re_canon_lookup.h"
#endif

#if defined(DUK_USE_REGEXP_CANON_BITMAP)
#include "duk_unicode_re_canon_bitmap.h"
#endif

/*
 *  Extern
 */

/* duk_unicode_support.c */
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const duk_uint8_t duk_unicode_xutf8_markers[7];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_digit[2];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_white[22];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_wordchar[8];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_not_digit[4];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_not_white[24];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_not_wordchar[10];
DUK_INTERNAL_DECL const duk_int8_t duk_is_idchar_tab[128];
#endif  /* !DUK_SINGLE_FILE */

/*
 *  Prototypes
 */

DUK_INTERNAL_DECL duk_small_int_t duk_unicode_get_xutf8_length(duk_ucodepoint_t cp);
#if defined(DUK_USE_ASSERTIONS)
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_get_cesu8_length(duk_ucodepoint_t cp);
#endif
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_encode_xutf8(duk_ucodepoint_t cp, duk_uint8_t *out);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_encode_cesu8(duk_ucodepoint_t cp, duk_uint8_t *out);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_decode_xutf8(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end, duk_ucodepoint_t *out_cp);
DUK_INTERNAL_DECL duk_ucodepoint_t duk_unicode_decode_xutf8_checked(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end);
DUK_INTERNAL_DECL duk_size_t duk_unicode_unvalidated_utf8_length(const duk_uint8_t *data, duk_size_t blen);
DUK_INTERNAL_DECL duk_bool_t duk_unicode_is_utf8_compatible(const duk_uint8_t *buf, duk_size_t len);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_whitespace(duk_codepoint_t cp);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_line_terminator(duk_codepoint_t cp);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_identifier_start(duk_codepoint_t cp);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_identifier_part(duk_codepoint_t cp);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_letter(duk_codepoint_t cp);
DUK_INTERNAL_DECL void duk_unicode_case_convert_string(duk_hthread *thr, duk_bool_t uppercase);
#if defined(DUK_USE_REGEXP_SUPPORT)
DUK_INTERNAL_DECL duk_codepoint_t duk_unicode_re_canonicalize_char(duk_hthread *thr, duk_codepoint_t cp);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_re_is_wordchar(duk_codepoint_t cp);
#endif

#endif  /* DUK_UNICODE_H_INCLUDED */
