485 lines
14 KiB
PHP
485 lines
14 KiB
PHP
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<?php
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class MYANMAR
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{
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/* FROM hb-ot-shape-complex-indic-private.hh */
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// indic_category
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const OT_X = 0;
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const OT_C = 1;
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const OT_V = 2;
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const OT_N = 3;
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const OT_H = 4;
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const OT_ZWNJ = 5;
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const OT_ZWJ = 6;
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const OT_M = 7; /* Matra or Dependent Vowel */
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const OT_SM = 8;
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const OT_VD = 9;
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const OT_A = 10;
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const OT_NBSP = 11;
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const OT_DOTTEDCIRCLE = 12; /* Not in the spec, but special in Uniscribe. /Very very/ special! */
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const OT_RS = 13; /* Register Shifter, used in Khmer OT spec */
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const OT_Coeng = 14;
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const OT_Repha = 15;
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const OT_Ra = 16; /* Not explicitly listed in the OT spec, but used in the grammar. */
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const OT_CM = 17;
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/* FROM hb-ot-shape-complex-myanmar.hh */
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// myanmar_category
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const OT_DB = 3; // same as INDIC::OT_N; /* Dot below */
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const OT_GB = 12; // same as INDIC::OT_DOTTEDCIRCLE;
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const OT_As = 18; /* Asat */
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const OT_D = 19; /* Digits except zero */
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const OT_D0 = 20; /* Digit zero */
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const OT_MH = 21; /* Various consonant medial types */
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const OT_MR = 22; /* Various consonant medial types */
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const OT_MW = 23; /* Various consonant medial types */
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const OT_MY = 24; /* Various consonant medial types */
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const OT_PT = 25; /* Pwo and other tones */
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const OT_VAbv = 26;
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const OT_VBlw = 27;
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const OT_VPre = 28;
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const OT_VPst = 29;
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const OT_VS = 30; /* Variation selectors */
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// Based on myanmar_category used to make string to find syllables
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// OT_ to string character (using e.g. OT_C from MYANMAR) hb-ot-shape-complex-myanmar-private.hh
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public static $myanmar_category_char = array(
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'x',
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'C',
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'V',
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'N',
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'H',
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'Z',
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'J',
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'x',
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'S',
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'x',
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'A',
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'x',
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'D',
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'x',
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'x',
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'x',
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'R',
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'x',
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'a', /* As Asat */
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'd', /* Digits except zero */
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'o', /* Digit zero */
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'k', /* Medial types */
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'l', /* Medial types */
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'm', /* Medial types */
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'n', /* Medial types */
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'p', /* Pwo and other tones */
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'v', /* Vowel aboVe */
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'b', /* Vowel Below */
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'e', /* Vowel prE */
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't', /* Vowel posT */
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's', /* variation Selector */
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);
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/* Visual positions in a syllable from left to right. */
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/* FROM hb-ot-shape-complex-myanmar-private.hh */
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// myanmar_position
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const POS_START = 0;
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const POS_RA_TO_BECOME_REPH = 1;
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const POS_PRE_M = 2;
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const POS_PRE_C = 3;
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const POS_BASE_C = 4;
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const POS_AFTER_MAIN = 5;
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const POS_ABOVE_C = 6;
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const POS_BEFORE_SUB = 7;
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const POS_BELOW_C = 8;
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const POS_AFTER_SUB = 9;
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const POS_BEFORE_POST = 10;
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const POS_POST_C = 11;
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const POS_AFTER_POST = 12;
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const POS_FINAL_C = 13;
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const POS_SMVD = 14;
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const POS_END = 15;
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public static function set_myanmar_properties(&$info)
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{
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$u = $info['uni'];
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$type = self::myanmar_get_categories($u);
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$cat = ($type & 0x7F);
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$pos = ($type >> 8);
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/*
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* Re-assign category
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* http://www.microsoft.com/typography/OpenTypeDev/myanmar/intro.htm#analyze
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*/
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if (self::in_range($u, 0xFE00, 0xFE0F))
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$cat = self::OT_VS;
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else if ($u == 0x200C)
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$cat = self::OT_ZWNJ;
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else if ($u == 0x200D)
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$cat = self::OT_ZWJ;
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switch ($u) {
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case 0x002D: case 0x00A0: case 0x00D7: case 0x2012:
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case 0x2013: case 0x2014: case 0x2015: case 0x2022:
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case 0x25CC: case 0x25FB: case 0x25FC: case 0x25FD:
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case 0x25FE:
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$cat = self::OT_GB;
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break;
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case 0x1004: case 0x101B: case 0x105A:
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$cat = self::OT_Ra;
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break;
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case 0x1032: case 0x1036:
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$cat = self::OT_A;
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break;
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case 0x103A:
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$cat = self::OT_As;
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break;
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case 0x1041: case 0x1042: case 0x1043: case 0x1044:
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case 0x1045: case 0x1046: case 0x1047: case 0x1048:
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case 0x1049: case 0x1090: case 0x1091: case 0x1092:
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case 0x1093: case 0x1094: case 0x1095: case 0x1096:
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case 0x1097: case 0x1098: case 0x1099:
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$cat = self::OT_D;
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break;
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case 0x1040:
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$cat = self::OT_D; /* XXX The spec says D0, but Uniscribe doesn't seem to do. */
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break;
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case 0x103E: case 0x1060:
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$cat = self::OT_MH;
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break;
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case 0x103C:
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$cat = self::OT_MR;
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break;
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case 0x103D: case 0x1082:
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$cat = self::OT_MW;
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break;
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case 0x103B: case 0x105E: case 0x105F:
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$cat = self::OT_MY;
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break;
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case 0x1063: case 0x1064: case 0x1069: case 0x106A:
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case 0x106B: case 0x106C: case 0x106D: case 0xAA7B:
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$cat = self::OT_PT;
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break;
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case 0x1038: case 0x1087: case 0x1088: case 0x1089:
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case 0x108A: case 0x108B: case 0x108C: case 0x108D:
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case 0x108F: case 0x109A: case 0x109B: case 0x109C:
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$cat = self::OT_SM;
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break;
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}
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if ($cat == self::OT_M) {
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switch ($pos) {
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case self::POS_PRE_C:
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$cat = self::OT_VPre;
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$pos = self::POS_PRE_M;
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break;
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case self::POS_ABOVE_C: $cat = self::OT_VAbv;
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break;
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case self::POS_BELOW_C: $cat = self::OT_VBlw;
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break;
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case self::POS_POST_C: $cat = self::OT_VPst;
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break;
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}
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}
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$info['myanmar_category'] = $cat;
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$info['myanmar_position'] = $pos;
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}
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// syllable_type
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const CONSONANT_SYLLABLE = 0;
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const BROKEN_CLUSTER = 3;
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const NON_MYANMAR_CLUSTER = 4;
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public static function set_syllables(&$o, $s, &$broken_syllables)
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{
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$ptr = 0;
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$syllable_serial = 1;
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$broken_syllables = false;
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while ($ptr < strlen($s)) {
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$match = '';
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$syllable_length = 1;
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$syllable_type = self::NON_MYANMAR_CLUSTER;
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// CONSONANT_SYLLABLE Consonant syllable
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// From OT spec:
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if (preg_match('/^(RaH)?([C|R]|V|d|D)[s]?(H([C|R|V])[s]?)*(H|[a]*[n]?[l]?((m[k]?|k)[a]?)?[e]*[v]*[b]*[A]*(N[a]?)?(t[k]?[a]*[v]*[A]*(N[a]?)?)*(p[A]*(N[a]?)?)*S*[J|Z]?)/', substr($s, $ptr), $ma)) {
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$syllable_length = strlen($ma[0]);
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$syllable_type = self::CONSONANT_SYLLABLE;
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}
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// BROKEN_CLUSTER syllable
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else if (preg_match('/^(RaH)?s?(H|[a]*[n]?[l]?((m[k]?|k)[a]?)?[e]*[v]*[b]*[A]*(N[a]?)?(t[k]?[a]*[v]*[A]*(N[a]?)?)*(p[A]*(N[a]?)?)*S*[J|Z]?)/', substr($s, $ptr), $ma)) {
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if (strlen($ma[0])) { // May match blank
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$syllable_length = strlen($ma[0]);
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$syllable_type = self::BROKEN_CLUSTER;
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$broken_syllables = true;
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}
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}
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for ($i = $ptr; $i < $ptr + $syllable_length; $i++) {
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$o[$i]['syllable'] = ($syllable_serial << 4) | $syllable_type;
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}
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$ptr += $syllable_length;
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$syllable_serial++;
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if ($syllable_serial == 16)
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$syllable_serial = 1;
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}
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}
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public static function reordering(&$info, $GSUBdata, $broken_syllables, $dottedcircle)
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{
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if ($broken_syllables && $dottedcircle) {
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self::insert_dotted_circles($info, $dottedcircle);
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}
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$count = count($info);
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if (!$count)
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return;
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$last = 0;
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$last_syllable = $info[0]['syllable'];
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for ($i = 1; $i < $count; $i++) {
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if ($last_syllable != $info[$i]['syllable']) {
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self::reordering_syllable($info, $GSUBdata, $last, $i);
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$last = $i;
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$last_syllable = $info[$last]['syllable'];
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}
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}
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self::reordering_syllable($info, $GSUBdata, $last, $count);
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}
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public static function insert_dotted_circles(&$info, $dottedcircle)
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{
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$idx = 0;
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$last_syllable = 0;
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while ($idx < count($info)) {
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$syllable = $info[$idx]['syllable'];
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$syllable_type = ($syllable & 0x0F);
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if ($last_syllable != $syllable && $syllable_type == self::BROKEN_CLUSTER) {
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$last_syllable = $syllable;
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$dottedcircle[0]['syllable'] = $info[$idx]['syllable'];
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array_splice($info, $idx, 0, $dottedcircle);
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} else
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$idx++;
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}
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// In case of final bloken cluster...
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$syllable = $info[$idx]['syllable'];
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$syllable_type = ($syllable & 0x0F);
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if ($last_syllable != $syllable && $syllable_type == self::BROKEN_CLUSTER) {
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$dottedcircle[0]['syllable'] = $info[$idx]['syllable'];
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array_splice($info, $idx, 0, $dottedcircle);
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}
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}
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/* Rules from:
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* https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx */
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public static function reordering_syllable(&$info, $GSUBdata, $start, $end)
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{
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/* vowel_syllable: We made the vowels look like consonants. So uses the consonant logic! */
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/* broken_cluster: We already inserted dotted-circles, so just call the standalone_cluster. */
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$syllable_type = ($info[$start]['syllable'] & 0x0F);
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if ($syllable_type == self::NON_MYANMAR_CLUSTER) {
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return;
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}
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if ($syllable_type == self::BROKEN_CLUSTER) {
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//if ($uniscribe_bug_compatible) {
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/* For dotted-circle, this is what Uniscribe does:
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* If dotted-circle is the last glyph, it just does nothing.
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* i.e. It doesn't form Reph. */
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if ($info[$end - 1]['myanmar_category'] == self::OT_DOTTEDCIRCLE) {
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return;
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}
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}
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$base = $end;
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$has_reph = false;
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$limit = $start;
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if (($start + 3 <= $end) &&
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$info[$start]['myanmar_category'] == self::OT_Ra &&
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$info[$start + 1]['myanmar_category'] == self::OT_As &&
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$info[$start + 2]['myanmar_category'] == self::OT_H) {
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$limit += 3;
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$base = $start;
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$has_reph = true;
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}
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if (!$has_reph)
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$base = $limit;
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for ($i = $limit; $i < $end; $i++) {
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if (self::is_consonant($info[$i])) {
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$base = $i;
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break;
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}
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}
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/* Reorder! */
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$i = $start;
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for (; $i < $start + ($has_reph ? 3 : 0); $i++)
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$info[$i]['myanmar_position'] = self::POS_AFTER_MAIN;
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for (; $i < $base; $i++)
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$info[$i]['myanmar_position'] = self::POS_PRE_C;
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if ($i < $end) {
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$info[$i]['myanmar_position'] = self::POS_BASE_C;
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$i++;
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}
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$pos = self::POS_AFTER_MAIN;
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/* The following loop may be ugly, but it implements all of
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* Myanmar reordering! */
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for (; $i < $end; $i++) {
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if ($info[$i]['myanmar_category'] == self::OT_MR) /* Pre-base reordering */ {
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$info[$i]['myanmar_position'] = self::POS_PRE_C;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if ($info[$i]['myanmar_position'] < self::POS_BASE_C) /* Left matra */ {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($pos == self::POS_AFTER_MAIN && $info[$i]['myanmar_category'] == self::OT_VBlw) {
|
||
|
|
$pos = self::POS_BELOW_C;
|
||
|
|
$info[$i]['myanmar_position'] = $pos;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($pos == self::POS_BELOW_C && $info[$i]['myanmar_category'] == self::OT_A) {
|
||
|
|
$info[$i]['myanmar_position'] = self::POS_BEFORE_SUB;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if ($pos == self::POS_BELOW_C && $info[$i]['myanmar_category'] == self::OT_VBlw) {
|
||
|
|
$info[$i]['myanmar_position'] = $pos;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if ($pos == self::POS_BELOW_C && $info[$i]['myanmar_category'] != self::OT_A) {
|
||
|
|
$pos = self::POS_AFTER_SUB;
|
||
|
|
$info[$i]['myanmar_position'] = $pos;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
$info[$i]['myanmar_position'] = $pos;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* Sit tight, rock 'n roll! */
|
||
|
|
self::bubble_sort($info, $start, $end - $start);
|
||
|
|
}
|
||
|
|
|
||
|
|
public static function is_one_of($info, $flags)
|
||
|
|
{
|
||
|
|
if (isset($info['is_ligature']) && $info['is_ligature'])
|
||
|
|
return false; /* If it ligated, all bets are off. */
|
||
|
|
return !!(self::FLAG($info['myanmar_category']) & $flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Vowels and placeholders treated as if they were consonants. */
|
||
|
|
|
||
|
|
public static function is_consonant($info)
|
||
|
|
{
|
||
|
|
return self::is_one_of($info, (self::FLAG(self::OT_C) | self::FLAG(self::OT_CM) | self::FLAG(self::OT_Ra) | self::FLAG(self::OT_V) | self::FLAG(self::OT_NBSP) | self::FLAG(self::OT_GB)));
|
||
|
|
}
|
||
|
|
|
||
|
|
// From hb-private.hh
|
||
|
|
public static function in_range($u, $lo, $hi)
|
||
|
|
{
|
||
|
|
if ((($lo ^ $hi) & $lo) == 0 && (($lo ^ $hi) & $hi) == ($lo ^ $hi) && (($lo ^ $hi) & (($lo ^ $hi) + 1)) == 0)
|
||
|
|
return ($u & ~($lo ^ $hi)) == $lo;
|
||
|
|
else
|
||
|
|
return $lo <= $u && $u <= $hi;
|
||
|
|
}
|
||
|
|
|
||
|
|
// From hb-private.hh
|
||
|
|
public static function FLAG($x)
|
||
|
|
{
|
||
|
|
return (1 << ($x));
|
||
|
|
}
|
||
|
|
|
||
|
|
public static function FLAG_RANGE($x, $y)
|
||
|
|
{
|
||
|
|
self::FLAG(y + 1) - self::FLAG(x);
|
||
|
|
}
|
||
|
|
|
||
|
|
// BELOW from hb-ot-shape-complex-indic.cc
|
||
|
|
// see INDIC for details
|
||
|
|
|
||
|
|
public static $myanmar_table = array(
|
||
|
|
/* Myanmar (1000..109F) */
|
||
|
|
|
||
|
|
/* 1000 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
|
||
|
|
/* 1008 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
|
||
|
|
/* 1010 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
|
||
|
|
/* 1018 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
|
||
|
|
/* 1020 */ 3841, 3842, 3842, 3842, 3842, 3842, 3842, 3842,
|
||
|
|
/* 1028 */ 3842, 3842, 3842, 2823, 2823, 1543, 1543, 2055,
|
||
|
|
/* 1030 */ 2055, 775, 1543, 1543, 1543, 1543, 3848, 3843,
|
||
|
|
/* 1038 */ 3848, 3844, 1540, 3857, 3857, 3857, 3857, 3841,
|
||
|
|
/* 1040 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
|
||
|
|
/* 1048 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
|
||
|
|
/* 1050 */ 3841, 3841, 3842, 3842, 3842, 3842, 2823, 2823,
|
||
|
|
/* 1058 */ 2055, 2055, 3841, 3841, 3841, 3841, 3857, 3857,
|
||
|
|
/* 1060 */ 3857, 3841, 2823, 3843, 3843, 3841, 3841, 2823,
|
||
|
|
/* 1068 */ 2823, 3843, 3843, 3843, 3843, 3843, 3841, 3841,
|
||
|
|
/* 1070 */ 3841, 1543, 1543, 1543, 1543, 3841, 3841, 3841,
|
||
|
|
/* 1078 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
|
||
|
|
/* 1080 */ 3841, 3841, 3857, 2823, 775, 1543, 1543, 3843,
|
||
|
|
/* 1088 */ 3843, 3843, 3843, 3843, 3843, 3843, 3841, 3843,
|
||
|
|
/* 1090 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
|
||
|
|
/* 1098 */ 3840, 3840, 3843, 3843, 2823, 1543, 3840, 3840,
|
||
|
|
/* Myanmar Extended-A (AA60..AA7F) */
|
||
|
|
|
||
|
|
/* AA60 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
|
||
|
|
/* AA68 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
|
||
|
|
/* AA70 */ 3840, 3841, 3841, 3841, 3840, 3840, 3840, 3840,
|
||
|
|
/* AA78 */ 3840, 3840, 3841, 3843, 3840, 3840, 3840, 3840,
|
||
|
|
);
|
||
|
|
|
||
|
|
// from "hb-ot-shape-complex-indic-table.cc"
|
||
|
|
public static function myanmar_get_categories($u)
|
||
|
|
{
|
||
|
|
if (0x1000 <= $u && $u <= 0x109F)
|
||
|
|
return self::$myanmar_table[$u - 0x1000 + 0]; // offset 0 for Most "myanmar"
|
||
|
|
if (0xAA60 <= $u && $u <= 0xAA7F)
|
||
|
|
return self::$myanmar_table[$u - 0xAA60 + 160]; // offset for extensions
|
||
|
|
if ($u == 0x00A0)
|
||
|
|
return 3851; // (ISC_CP | (IMC_x << 8))
|
||
|
|
if ($u == 0x25CC)
|
||
|
|
return 3851; // (ISC_CP | (IMC_x << 8))
|
||
|
|
return 3840; // (ISC_x | (IMC_x << 8))
|
||
|
|
}
|
||
|
|
|
||
|
|
public static function bubble_sort(&$arr, $start, $len)
|
||
|
|
{
|
||
|
|
if ($len < 2) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
$k = $start + $len - 2;
|
||
|
|
while ($k >= $start) {
|
||
|
|
for ($j = $start; $j <= $k; $j++) {
|
||
|
|
if ($arr[$j]['myanmar_position'] > $arr[$j + 1]['myanmar_position']) {
|
||
|
|
$t = $arr[$j];
|
||
|
|
$arr[$j] = $arr[$j + 1];
|
||
|
|
$arr[$j + 1] = $t;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$k--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|