[perl5.git] / cpan / Unicode-Collate / Collate.xs


#define PERL_NO_GET_CONTEXT /* we want efficiency */

/* I guese no private function needs pTHX_ and aTHX_ */

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

/* This file is prepared by mkheader */
#include "ucatbl.h"

/* Perl 5.6.1 ? */
#ifdef utf8_to_uv
#define utf8n_to_uvuni  utf8_to_uv
#endif /* utf8_to_uv */

/* UTF8_ALLOW_BOM is used before Perl 5.8.0 */
#ifndef UTF8_ALLOW_BOM
#define UTF8_ALLOW_BOM  (0)
#endif /* UTF8_ALLOW_BOM */

#ifndef UTF8_ALLOW_SURROGATE
#define UTF8_ALLOW_SURROGATE  (0)
#endif /* UTF8_ALLOW_SURROGATE */

#ifndef UTF8_ALLOW_FE_FF
#define UTF8_ALLOW_FE_FF  (0)
#endif /* UTF8_ALLOW_FE_FF */

#ifndef UTF8_ALLOW_FFFF
#define UTF8_ALLOW_FFFF  (0)
#endif /* UTF8_ALLOW_FFFF */

#define AllowAnyUTF (UTF8_ALLOW_SURROGATE|UTF8_ALLOW_BOM|UTF8_ALLOW_FE_FF|UTF8_ALLOW_FFFF)

/* perl 5.6.x workaround, before 5.8.0 */
#ifdef utf8n_to_uvuni
#define GET_UV_FOR_5_6	utf8n_to_uvuni(p, e - p, &retlen, AllowAnyUTF)
#else
#define GET_UV_FOR_5_6	retlen = 1 /* avoid an infinite loop */
#endif /* utf8n_to_uvuni */

/* At present, char > 0x10ffff are unaffected without complaint, right? */
#define VALID_UTF_MAX    (0x10ffff)
#define OVER_UTF_MAX(uv) (VALID_UTF_MAX < (uv))

static const UV max_div_16 = UV_MAX / 16;

/* Supported Levels */
#define MinLevel	(1)
#define MaxLevel	(4)

/* Shifted weight at 4th level */
#define Shift4Wt	(0xFFFF)

#define VCE_Length	(9)

#define Hangul_SBase  (0xAC00)
#define Hangul_SIni   (0xAC00)
#define Hangul_SFin   (0xD7A3)
#define Hangul_NCount (588)
#define Hangul_TCount (28)
#define Hangul_LBase  (0x1100)
#define Hangul_LIni   (0x1100)
#define Hangul_LFin   (0x1159)
#define Hangul_LFill  (0x115F)
#define Hangul_LEnd   (0x115F) /* Unicode 5.2 */
#define Hangul_VBase  (0x1161)
#define Hangul_VIni   (0x1160) /* from Vowel Filler */
#define Hangul_VFin   (0x11A2)
#define Hangul_VEnd   (0x11A7) /* Unicode 5.2 */
#define Hangul_TBase  (0x11A7) /* from "no-final" codepoint */
#define Hangul_TIni   (0x11A8)
#define Hangul_TFin   (0x11F9)
#define Hangul_TEnd   (0x11FF) /* Unicode 5.2 */
#define HangulL2Ini   (0xA960) /* Unicode 5.2 */
#define HangulL2Fin   (0xA97C) /* Unicode 5.2 */
#define HangulV2Ini   (0xD7B0) /* Unicode 5.2 */
#define HangulV2Fin   (0xD7C6) /* Unicode 5.2 */
#define HangulT2Ini   (0xD7CB) /* Unicode 5.2 */
#define HangulT2Fin   (0xD7FB) /* Unicode 5.2 */

#define CJK_UidIni    (0x4E00)
#define CJK_UidFin    (0x9FA5)
#define CJK_UidF41    (0x9FBB)
#define CJK_UidF51    (0x9FC3)
#define CJK_UidF52    (0x9FCB)
#define CJK_UidF61    (0x9FCC)
#define CJK_ExtAIni   (0x3400) /* Unicode 3.0 */
#define CJK_ExtAFin   (0x4DB5) /* Unicode 3.0 */
#define CJK_ExtBIni  (0x20000) /* Unicode 3.1 */
#define CJK_ExtBFin  (0x2A6D6) /* Unicode 3.1 */
#define CJK_ExtCIni  (0x2A700) /* Unicode 5.2 */
#define CJK_ExtCFin  (0x2B734) /* Unicode 5.2 */
#define CJK_ExtDIni  (0x2B740) /* Unicode 6.0 */
#define CJK_ExtDFin  (0x2B81D) /* Unicode 6.0 */

#define CJK_CompIni  (0xFA0E)
#define CJK_CompFin  (0xFA29)
static STDCHAR UnifiedCompat[] = {
      1,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,1,1,0,0,1,1,1
}; /* E F 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 */

#define codeRange(bcode, ecode)	((bcode) <= code && code <= (ecode))

MODULE = Unicode::Collate	PACKAGE = Unicode::Collate

PROTOTYPES: DISABLE

void
_fetch_rest ()
  PREINIT:
    char ** rest;
  PPCODE:
    for (rest = UCA_rest; *rest; ++rest) {
	XPUSHs(sv_2mortal(newSVpv((char *) *rest, 0)));
    }


void
_fetch_simple (uv)
    UV uv
  PREINIT:
    U8 ***plane, **row;
    U8* result = NULL;
  PPCODE:
    if (!OVER_UTF_MAX(uv)){
	plane = (U8***)UCA_simple[uv >> 16];
	if (plane) {
	    row = plane[(uv >> 8) & 0xff];
	    result = row ? row[uv & 0xff] : NULL;
	}
    }
    if (result) {
	int i;
	int num = (int)*result;
	++result;
	for (i = 0; i < num; ++i) {
	    XPUSHs(sv_2mortal(newSVpvn((char *) result, VCE_Length)));
	    result += VCE_Length;
	}
    } else {
	XPUSHs(sv_2mortal(newSViv(0)));
    }

SV*
_ignorable_simple (uv)
    UV uv
  ALIAS:
    _exists_simple = 1
  PREINIT:
    U8 ***plane, **row;
    int num = -1;
    U8* result = NULL;
  CODE:
    if (!OVER_UTF_MAX(uv)){
	plane = (U8***)UCA_simple[uv >> 16];
	if (plane) {
	    row = plane[(uv >> 8) & 0xff];
	    result = row ? row[uv & 0xff] : NULL;
	}
	if (result)
	    num = (int)*result; /* assuming 0 <= num < 128 */
    }

    if (ix)
	RETVAL = boolSV(num >0);
    else
	RETVAL = boolSV(num==0);
  OUTPUT:
    RETVAL


void
_getHexArray (src)
    SV* src
  PREINIT:
    char *s, *e;
    STRLEN byte;
    UV value;
    bool overflowed = FALSE;
    const char *hexdigit;
  PPCODE:
    s = SvPV(src,byte);
    for (e = s + byte; s < e;) {
	hexdigit = strchr((char *) PL_hexdigit, *s++);
        if (! hexdigit)
	    continue;
	value = (hexdigit - PL_hexdigit) & 0xF;
	while (*s) {
	    hexdigit = strchr((char *) PL_hexdigit, *s++);
	    if (! hexdigit)
		break;
	    if (overflowed)
		continue;
	    if (value > max_div_16) {
		overflowed = TRUE;
		continue;
	    }
	    value = (value << 4) | ((hexdigit - PL_hexdigit) & 0xF);
	}
	XPUSHs(sv_2mortal(newSVuv(overflowed ? UV_MAX : value)));
    }


SV*
_isIllegal (sv)
    SV* sv
  PREINIT:
    UV uv;
  CODE:
    if (!sv || !SvIOK(sv))
	XSRETURN_YES;
    uv = SvUVX(sv);
    RETVAL = boolSV(
	   0x10FFFF < uv                   /* out of range */
	|| ((uv & 0xFFFE) == 0xFFFE)       /* ??FFF[EF] */
	|| (0xD800 <= uv && uv <= 0xDFFF)  /* unpaired surrogates */
	|| (0xFDD0 <= uv && uv <= 0xFDEF)  /* other non-characters */
    );
OUTPUT:
    RETVAL


void
_decompHangul (code)
    UV code
  PREINIT:
    UV sindex, lindex, vindex, tindex;
  PPCODE:
    /* code *must* be in Hangul syllable.
     * Check it before you enter here. */
    sindex =  code - Hangul_SBase;
    lindex =  sindex / Hangul_NCount;
    vindex = (sindex % Hangul_NCount) / Hangul_TCount;
    tindex =  sindex % Hangul_TCount;

    XPUSHs(sv_2mortal(newSVuv(lindex + Hangul_LBase)));
    XPUSHs(sv_2mortal(newSVuv(vindex + Hangul_VBase)));
    if (tindex)
	XPUSHs(sv_2mortal(newSVuv(tindex + Hangul_TBase)));


SV*
getHST (code, uca_vers = 0)
    UV code;
    IV uca_vers;
  PREINIT:
    const char * hangtype;
    STRLEN typelen;
  CODE:
    if (codeRange(Hangul_SIni, Hangul_SFin)) {
	if ((code - Hangul_SBase) % Hangul_TCount) {
	    hangtype = "LVT"; typelen = 3;
	} else {
	    hangtype = "LV"; typelen = 2;
	}
    } else if (uca_vers < 20) {
	if (codeRange(Hangul_LIni, Hangul_LFin) || code == Hangul_LFill) {
	    hangtype = "L"; typelen = 1;
	} else if (codeRange(Hangul_VIni, Hangul_VFin)) {
	    hangtype = "V"; typelen = 1;
	} else if (codeRange(Hangul_TIni, Hangul_TFin)) {
	    hangtype = "T"; typelen = 1;
	} else {
	    hangtype = ""; typelen = 0;
	}
    } else {
	if        (codeRange(Hangul_LIni, Hangul_LEnd) ||
		   codeRange(HangulL2Ini, HangulL2Fin)) {
	    hangtype = "L"; typelen = 1;
	} else if (codeRange(Hangul_VIni, Hangul_VEnd) ||
		   codeRange(HangulV2Ini, HangulV2Fin)) {
	    hangtype = "V"; typelen = 1;
	} else if (codeRange(Hangul_TIni, Hangul_TEnd) ||
		   codeRange(HangulT2Ini, HangulT2Fin)) {
	    hangtype = "T"; typelen = 1;
	} else {
	    hangtype = ""; typelen = 0;
	}
    }

    RETVAL = newSVpvn(hangtype, typelen);
OUTPUT:
    RETVAL


void
_derivCE_9 (code)
    UV code
  ALIAS:
    _derivCE_14 = 1
    _derivCE_18 = 2
    _derivCE_20 = 3
    _derivCE_22 = 4
    _derivCE_24 = 5
  PREINIT:
    UV base, aaaa, bbbb;
    U8 a[VCE_Length + 1] = "\x00\xFF\xFF\x00\x20\x00\x02\xFF\xFF";
    U8 b[VCE_Length + 1] = "\x00\xFF\xFF\x00\x00\x00\x00\xFF\xFF";
    bool basic_unified = 0;
  PPCODE:
    if (CJK_UidIni <= code) {
	if (codeRange(CJK_CompIni, CJK_CompFin))
	    basic_unified = (bool)UnifiedCompat[code - CJK_CompIni];
	else
	    basic_unified = (ix >= 5 ? (code <= CJK_UidF61) :
			     ix >= 3 ? (code <= CJK_UidF52) :
			     ix == 2 ? (code <= CJK_UidF51) :
			     ix == 1 ? (code <= CJK_UidF41) :
				       (code <= CJK_UidFin));
    }
    base = (basic_unified)
	    ? 0xFB40 : /* CJK */
	   ((codeRange(CJK_ExtAIni, CJK_ExtAFin))
		||
	    (codeRange(CJK_ExtBIni, CJK_ExtBFin))
		||
	    (ix >= 3 && codeRange(CJK_ExtCIni, CJK_ExtCFin))
		||
	    (ix >= 4 && codeRange(CJK_ExtDIni, CJK_ExtDFin)))
	    ? 0xFB80   /* CJK ext. */
	    : 0xFBC0;  /* others */
    aaaa =  base + (code >> 15);
    bbbb = (code & 0x7FFF) | 0x8000;
    a[1] = (U8)(aaaa >> 8);
    a[2] = (U8)(aaaa & 0xFF);
    b[1] = (U8)(bbbb >> 8);
    b[2] = (U8)(bbbb & 0xFF);
    a[7] = b[7] = (U8)(code >> 8);
    a[8] = b[8] = (U8)(code & 0xFF);
    XPUSHs(sv_2mortal(newSVpvn((char *) a, VCE_Length)));
    XPUSHs(sv_2mortal(newSVpvn((char *) b, VCE_Length)));


void
_derivCE_8 (code)
    UV code
  PREINIT:
    UV aaaa, bbbb;
    U8 a[VCE_Length + 1] = "\x00\xFF\xFF\x00\x02\x00\x01\xFF\xFF";
    U8 b[VCE_Length + 1] = "\x00\xFF\xFF\x00\x00\x00\x00\xFF\xFF";
  PPCODE:
    aaaa =  0xFF80 + (code >> 15);
    bbbb = (code & 0x7FFF) | 0x8000;
    a[1] = (U8)(aaaa >> 8);
    a[2] = (U8)(aaaa & 0xFF);
    b[1] = (U8)(bbbb >> 8);
    b[2] = (U8)(bbbb & 0xFF);
    a[7] = b[7] = (U8)(code >> 8);
    a[8] = b[8] = (U8)(code & 0xFF);
    XPUSHs(sv_2mortal(newSVpvn((char *) a, VCE_Length)));
    XPUSHs(sv_2mortal(newSVpvn((char *) b, VCE_Length)));


void
_uideoCE_8 (code)
    UV code
  PREINIT:
    U8 uice[VCE_Length + 1] = "\x00\xFF\xFF\x00\x20\x00\x02\xFF\xFF";
  PPCODE:
    uice[1] = uice[7] = (U8)(code >> 8);
    uice[2] = uice[8] = (U8)(code & 0xFF);
    XPUSHs(sv_2mortal(newSVpvn((char *) uice, VCE_Length)));


SV*
_isUIdeo (code, uca_vers)
    UV code;
    IV uca_vers;
    bool basic_unified = 0;
  CODE:
    /* uca_vers = 0 for _uideoCE_8() */
    if (CJK_UidIni <= code) {
	if (codeRange(CJK_CompIni, CJK_CompFin))
	    basic_unified = (bool)UnifiedCompat[code - CJK_CompIni];
	else
	    basic_unified = (uca_vers >= 24 ? (code <= CJK_UidF61) :
			     uca_vers >= 20 ? (code <= CJK_UidF52) :
			     uca_vers >= 18 ? (code <= CJK_UidF51) :
			     uca_vers >= 14 ? (code <= CJK_UidF41) :
					      (code <= CJK_UidFin));
    }
    RETVAL = boolSV(
	(basic_unified)
		||
	(codeRange(CJK_ExtAIni, CJK_ExtAFin))
		||
	(uca_vers >=  8 && codeRange(CJK_ExtBIni, CJK_ExtBFin))
		||
	(uca_vers >= 20 && codeRange(CJK_ExtCIni, CJK_ExtCFin))
		||
	(uca_vers >= 22 && codeRange(CJK_ExtDIni, CJK_ExtDFin))
    );
OUTPUT:
    RETVAL


SV*
mk_SortKey (self, buf)
    SV* self;
    SV* buf;
  PREINIT:
    SV *dst, **svp;
    STRLEN dlen, vlen;
    U8 *d, *p, *e, *v, *s[MaxLevel], *eachlevel[MaxLevel];
    AV *bufAV;
    HV *selfHV;
    UV back_flag;
    I32 i, buf_len;
    IV  lv, level, uca_vers;
    bool upper_lower, kata_hira, v2i, last_is_var;
  CODE:
    if (SvROK(self) && SvTYPE(SvRV(self)) == SVt_PVHV)
	selfHV = (HV*)SvRV(self);
    else
	croak("$self is not a HASHREF.");

    if (SvROK(buf) && SvTYPE(SvRV(buf)) == SVt_PVAV)
	bufAV = (AV*)SvRV(buf);
    else
	croak("XSUB, not an ARRAYREF.");

    buf_len = av_len(bufAV);

    if (buf_len < 0) { /* empty: -1 */
	dlen = 2 * (MaxLevel - 1);
	dst = newSV(dlen);
	(void)SvPOK_only(dst);
	d = (U8*)SvPVX(dst);
	while (dlen--)
	    *d++ = '\0';
    } else {
	svp = hv_fetch(selfHV, "level", 5, FALSE);
	level = svp ? SvIV(*svp) : MaxLevel;

	for (lv = 0; lv < level; lv++) {
	    New(0, eachlevel[lv], 2 * (1 + buf_len) + 1, U8);
	    s[lv] = eachlevel[lv];
	}

	svp = hv_fetch(selfHV, "upper_before_lower", 18, FALSE);
	upper_lower = svp ? SvTRUE(*svp) : FALSE;
	svp = hv_fetch(selfHV, "katakana_before_hiragana", 24, FALSE);
	kata_hira = svp ? SvTRUE(*svp) : FALSE;
	svp = hv_fetch(selfHV, "UCA_Version", 11, FALSE);
	uca_vers = SvIV(*svp);
	svp = hv_fetch(selfHV, "variable", 8, FALSE);
	v2i = uca_vers >= 9 && svp /* (vers >= 9) and not (non-ignorable) */
	    ? !(SvCUR(*svp) == 13 && memEQ(SvPVX(*svp), "non-ignorable", 13))
	    : FALSE;

	last_is_var = FALSE;
	for (i = 0; i <= buf_len; i++) {
	    svp = av_fetch(bufAV, i, FALSE);

	    if (svp && SvPOK(*svp))
		v = (U8*)SvPV(*svp, vlen);
	    else
		croak("not a vwt.");

	    if (vlen < VCE_Length) /* ignore short VCE (unexpected) */
		continue;

	    /* "Ignorable (L1, L2) after Variable" since track. v. 9 */
	    if (v2i) {
		if (*v)
		    last_is_var = TRUE;
		else if (v[1] || v[2]) /* non zero primary weight */
		    last_is_var = FALSE;
		else if (last_is_var) /* zero primary weight; skipped */
		    continue;
	    }

	    if (v[5] == 0) { /* tert wt < 256 */
		if (upper_lower) {
		    if (0x8 <= v[6] && v[6] <= 0xC) /* lower */
			v[6] -= 6;
		    else if (0x2 <= v[6] && v[6] <= 0x6) /* upper */
			v[6] += 6;
		    else if (v[6] == 0x1C) /* square upper */
			v[6]++;
		    else if (v[6] == 0x1D) /* square lower */
			v[6]--;
		}
		if (kata_hira) {
		    if (0x0F <= v[6] && v[6] <= 0x13) /* katakana */
			v[6] -= 2;
		    else if (0xD <= v[6] && v[6] <= 0xE) /* hiragana */
			v[6] += 5;
		}
	    }

	    for (lv = 0; lv < level; lv++) {
		if (v[2 * lv + 1] || v[2 * lv + 2]) {
		    *s[lv]++ = v[2 * lv + 1];
		    *s[lv]++ = v[2 * lv + 2];
		}
	    }
	}

	dlen = 2 * (MaxLevel - 1);
	for (lv = 0; lv < level; lv++)
	    dlen += s[lv] - eachlevel[lv];

	dst = newSV(dlen);
	(void)SvPOK_only(dst);
	d = (U8*)SvPVX(dst);

	svp = hv_fetch(selfHV, "backwardsFlag", 13, FALSE);
	back_flag = svp ? SvUV(*svp) : (UV)0;

	for (lv = 0; lv < level; lv++) {
	    if (back_flag & (1 << (lv + 1))) {
		p = s[lv];
		e = eachlevel[lv];
		for ( ; e < p; p -= 2) {
		    *d++ = p[-2];
		    *d++ = p[-1];
		}
	    }
	    else {
		p = eachlevel[lv];
		e = s[lv];
		while (p < e)
		    *d++ = *p++;
	    }
	    if (lv + 1 < MaxLevel) { /* lv + 1 == real level */
		*d++ = '\0';
		*d++ = '\0';
	    }
	}

	for (lv = level; lv < MaxLevel; lv++) {
	    if (lv + 1 < MaxLevel) { /* lv + 1 == real level */
		*d++ = '\0';
		*d++ = '\0';
	    }
	}

	for (lv = 0; lv < level; lv++) {
	    Safefree(eachlevel[lv]);
	}
    }
    *d = '\0';
    SvCUR_set(dst, d - (U8*)SvPVX(dst));
    RETVAL = dst;
OUTPUT:
    RETVAL


SV*
varCE (self, vce)
    SV* self;
    SV* vce;
  PREINIT:
    SV *dst, *vbl, **svp;
    HV *selfHV;
    U8 *a, *v, *d;
    STRLEN alen, vlen;
    bool ig_l2;
    UV totwt;
  CODE:
    if (SvROK(self) && SvTYPE(SvRV(self)) == SVt_PVHV)
	selfHV = (HV*)SvRV(self);
    else
	croak("$self is not a HASHREF.");

    svp = hv_fetch(selfHV, "ignore_level2", 13, FALSE);
    ig_l2 = svp ? SvTRUE(*svp) : FALSE;

    svp = hv_fetch(selfHV, "variable", 8, FALSE);
    vbl = svp ? *svp : &PL_sv_no;
    a = (U8*)SvPV(vbl, alen);
    v = (U8*)SvPV(vce, vlen);

    dst = newSV(vlen);
    d = (U8*)SvPVX(dst);
    (void)SvPOK_only(dst);
    Copy(v, d, vlen, U8);
    SvCUR_set(dst, vlen);
    d[vlen] = '\0';

    /* primary weight == 0 && secondary weight != 0 */
    if (ig_l2 && !d[1] && !d[2] && (d[3] || d[4])) {
	d[3] = d[4] = d[5] = d[6] = '\0';
    }

    /* variable: checked only the first char and the length,
       trusting checkCollator() and %VariableOK in Perl ... */

    if (vlen >= VCE_Length && *a != 'n') {
	if (*v) {
	    if (*a == 's') { /* shifted or shift-trimmed */
		d[7] = d[1]; /* wt level 1 to 4 */
		d[8] = d[2];
	    } /* else blanked */
	    d[1] = d[2] = d[3] = d[4] = d[5] = d[6] = '\0';
	} else if (*a == 's') { /* shifted or shift-trimmed */
	    totwt = d[1] + d[2] + d[3] + d[4] + d[5] + d[6];
	    if (alen == 7 && totwt != 0) { /* shifted */
		if (d[1] == 0 && d[2] == 1) { /* XXX: CollationAuxiliary-6.2.0 */
		    d[7] = d[1]; /* wt level 1 to 4 */
		    d[8] = d[2];
		} else {
		    d[7] = (U8)(Shift4Wt >> 8);
		    d[8] = (U8)(Shift4Wt & 0xFF);
		}
	    } else { /* shift-trimmed or completely ignorable */
		d[7] = d[8] = '\0';
	    }
	} /* else blanked */
    } /* else non-ignorable */
    RETVAL = dst;
OUTPUT:
    RETVAL


SV*
visualizeSortKey (self, key)
    SV * self
    SV * key
  PREINIT:
    HV *selfHV;
    SV **svp, *dst;
    U8 *s, *e, *d;
    STRLEN klen, dlen;
    UV uv;
    IV uca_vers, sep = 0;
    static const char *upperhex = "0123456789ABCDEF";
  CODE:
    if (SvROK(self) && SvTYPE(SvRV(self)) == SVt_PVHV)
	selfHV = (HV*)SvRV(self);
    else
	croak("$self is not a HASHREF.");

    svp = hv_fetch(selfHV, "UCA_Version", 11, FALSE);
    if (!svp)
	croak("Panic: no $self->{UCA_Version} in visualizeSortKey");
    uca_vers = SvIV(*svp);

    s = (U8*)SvPV(key, klen);

   /* slightly *longer* than the need, but I'm afraid of miscounting;
      = (klen / 2) * 5 - 1
             # FFFF and ' ' for each 16bit units but ' ' is less by 1;
             # ' ' and '|' for level boundaries including the identical level
       + 2   # '[' and ']'
       + 1   # '\0'
       (a) if klen is odd (not expected), maybe more 5 bytes.
       (b) there is not always the identical level.
   */
    dlen = (klen / 2) * 5 + MaxLevel * 2 + 2;
    dst = newSV(dlen);
    (void)SvPOK_only(dst);
    d = (U8*)SvPVX(dst);

    *d++ = '[';
    for (e = s + klen; s < e; s += 2) {
	uv = (U16)(*s << 8 | s[1]);
	if (uv || sep >= MaxLevel) {
	    if ((d[-1] != '[') && ((9 <= uca_vers) || (d[-1] != '|')))
		*d++ = ' ';
	    *d++ = upperhex[ (s[0] >> 4) & 0xF ];
	    *d++ = upperhex[  s[0]       & 0xF ];
	    *d++ = upperhex[ (s[1] >> 4) & 0xF ];
	    *d++ = upperhex[  s[1]       & 0xF ];
	} else {
	    if ((9 <= uca_vers) && (d[-1] != '['))
		*d++ = ' ';
	    *d++ = '|';
	    ++sep;
	}
    }
    *d++ = ']';
    *d   = '\0';
    SvCUR_set(dst, d - (U8*)SvPVX(dst));
    RETVAL = dst;
OUTPUT:
    RETVAL


void
unpackUfor56 (src)
    SV* src
  PREINIT:
    STRLEN srclen, retlen;
    U8 *s, *p, *e;
    UV uv;
  PPCODE:
    s = (U8*)SvPV(src,srclen);
    if (!SvUTF8(src)) {
	SV* tmpsv = sv_mortalcopy(src);
	if (!SvPOK(tmpsv))
	    (void)sv_pvn_force(tmpsv,&srclen);
	sv_utf8_upgrade(tmpsv);
	s = (U8*)SvPV(tmpsv,srclen);
    }
    e = s + srclen;

    for (p = s; p < e; p += retlen) {
	uv = GET_UV_FOR_5_6; /* perl 5.6.x workaround */
	if (!retlen)
	    croak("panic (Unicode::Collate): zero-length character");
	XPUSHs(sv_2mortal(newSVuv(uv)));
    }
Commit	Line	Data
cd7f10f7 CBW	1
	2	#define PERL_NO_GET_CONTEXT /* we want efficiency */
	3
	4	/* I guese no private function needs pTHX_ and aTHX_ */
	5
f58b9ef1 CBW	6	#include "EXTERN.h"
	7	#include "perl.h"
	8	#include "XSUB.h"
	9
	10	/* This file is prepared by mkheader */
	11	#include "ucatbl.h"
	12
d2309057	13	/* Perl 5.6.1 ? */
f8187d97	14	#ifdef utf8_to_uv
d2309057	15	#define utf8n_to_uvuni utf8_to_uv
f8187d97	16	#endif /* utf8_to_uv */
d2309057 CBW	17
	18	/* UTF8_ALLOW_BOM is used before Perl 5.8.0 */
	19	#ifndef UTF8_ALLOW_BOM
	20	#define UTF8_ALLOW_BOM (0)
	21	#endif /* UTF8_ALLOW_BOM */
	22
	23	#ifndef UTF8_ALLOW_SURROGATE
	24	#define UTF8_ALLOW_SURROGATE (0)
	25	#endif /* UTF8_ALLOW_SURROGATE */
	26
	27	#ifndef UTF8_ALLOW_FE_FF
	28	#define UTF8_ALLOW_FE_FF (0)
	29	#endif /* UTF8_ALLOW_FE_FF */
	30
	31	#ifndef UTF8_ALLOW_FFFF
	32	#define UTF8_ALLOW_FFFF (0)
	33	#endif /* UTF8_ALLOW_FFFF */
	34
	35	#define AllowAnyUTF (UTF8_ALLOW_SURROGATE\|UTF8_ALLOW_BOM\|UTF8_ALLOW_FE_FF\|UTF8_ALLOW_FFFF)
	36
	37	/* perl 5.6.x workaround, before 5.8.0 */
	38	#ifdef utf8n_to_uvuni
	39	#define GET_UV_FOR_5_6 utf8n_to_uvuni(p, e - p, &retlen, AllowAnyUTF)
	40	#else
	41	#define GET_UV_FOR_5_6 retlen = 1 /* avoid an infinite loop */
	42	#endif /* utf8n_to_uvuni */
	43
f58b9ef1 CBW	44	/* At present, char > 0x10ffff are unaffected without complaint, right? */
	45	#define VALID_UTF_MAX (0x10ffff)
	46	#define OVER_UTF_MAX(uv) (VALID_UTF_MAX < (uv))
	47
	48	static const UV max_div_16 = UV_MAX / 16;
	49
	50	/* Supported Levels */
	51	#define MinLevel (1)
	52	#define MaxLevel (4)
	53
	54	/* Shifted weight at 4th level */
	55	#define Shift4Wt (0xFFFF)
	56
	57	#define VCE_Length (9)
	58
	59	#define Hangul_SBase (0xAC00)
	60	#define Hangul_SIni (0xAC00)
	61	#define Hangul_SFin (0xD7A3)
	62	#define Hangul_NCount (588)
	63	#define Hangul_TCount (28)
	64	#define Hangul_LBase (0x1100)
	65	#define Hangul_LIni (0x1100)
	66	#define Hangul_LFin (0x1159)
	67	#define Hangul_LFill (0x115F)
	68	#define Hangul_LEnd (0x115F) /* Unicode 5.2 */
	69	#define Hangul_VBase (0x1161)
	70	#define Hangul_VIni (0x1160) /* from Vowel Filler */
	71	#define Hangul_VFin (0x11A2)
	72	#define Hangul_VEnd (0x11A7) /* Unicode 5.2 */
	73	#define Hangul_TBase (0x11A7) /* from "no-final" codepoint */
	74	#define Hangul_TIni (0x11A8)
	75	#define Hangul_TFin (0x11F9)
	76	#define Hangul_TEnd (0x11FF) /* Unicode 5.2 */
	77	#define HangulL2Ini (0xA960) /* Unicode 5.2 */
	78	#define HangulL2Fin (0xA97C) /* Unicode 5.2 */
	79	#define HangulV2Ini (0xD7B0) /* Unicode 5.2 */
	80	#define HangulV2Fin (0xD7C6) /* Unicode 5.2 */
	81	#define HangulT2Ini (0xD7CB) /* Unicode 5.2 */
	82	#define HangulT2Fin (0xD7FB) /* Unicode 5.2 */
	83
	84	#define CJK_UidIni (0x4E00)
	85	#define CJK_UidFin (0x9FA5)
	86	#define CJK_UidF41 (0x9FBB)
	87	#define CJK_UidF51 (0x9FC3)
	88	#define CJK_UidF52 (0x9FCB)
cba8842c	89	#define CJK_UidF61 (0x9FCC)
f58b9ef1 CBW	90	#define CJK_ExtAIni (0x3400) /* Unicode 3.0 */
	91	#define CJK_ExtAFin (0x4DB5) /* Unicode 3.0 */
	92	#define CJK_ExtBIni (0x20000) /* Unicode 3.1 */
	93	#define CJK_ExtBFin (0x2A6D6) /* Unicode 3.1 */
	94	#define CJK_ExtCIni (0x2A700) /* Unicode 5.2 */
	95	#define CJK_ExtCFin (0x2B734) /* Unicode 5.2 */
	96	#define CJK_ExtDIni (0x2B740) /* Unicode 6.0 */
	97	#define CJK_ExtDFin (0x2B81D) /* Unicode 6.0 */
	98
46267efc CBW	99	#define CJK_CompIni (0xFA0E)
46267efc CBW	100	#define CJK_CompFin (0xFA29)
f58b9ef1 CBW	101	static STDCHAR UnifiedCompat[] = {
	102	1,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,1,1,0,0,1,1,1
	103	}; /* E F 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 */
	104
	105	#define codeRange(bcode, ecode) ((bcode) <= code && code <= (ecode))
	106
	107	MODULE = Unicode::Collate PACKAGE = Unicode::Collate
	108
	109	PROTOTYPES: DISABLE
	110
	111	void
	112	_fetch_rest ()
	113	PREINIT:
	114	char ** rest;
	115	PPCODE:
	116	for (rest = UCA_rest; *rest; ++rest) {
	117	XPUSHs(sv_2mortal(newSVpv((char ) rest, 0)));
	118	}
	119
	120
	121	void
	122	_fetch_simple (uv)
	123	UV uv
	124	PREINIT:
	125	U8 *plane, row;
	126	U8* result = NULL;
	127	PPCODE:
	128	if (!OVER_UTF_MAX(uv)){
	129	plane = (U8***)UCA_simple[uv >> 16];
	130	if (plane) {
	131	row = plane[(uv >> 8) & 0xff];
	132	result = row ? row[uv & 0xff] : NULL;
	133	}
	134	}
	135	if (result) {
	136	int i;
	137	int num = (int)*result;
	138	++result;
	139	for (i = 0; i < num; ++i) {
	140	XPUSHs(sv_2mortal(newSVpvn((char *) result, VCE_Length)));
	141	result += VCE_Length;
	142	}
	143	} else {
	144	XPUSHs(sv_2mortal(newSViv(0)));
	145	}
	146
	147	SV*
	148	_ignorable_simple (uv)
	149	UV uv
	150	ALIAS:
	151	_exists_simple = 1
	152	PREINIT:
	153	U8 *plane, row;
	154	int num = -1;
	155	U8* result = NULL;
	156	CODE:
	157	if (!OVER_UTF_MAX(uv)){
	158	plane = (U8***)UCA_simple[uv >> 16];
	159	if (plane) {
	160	row = plane[(uv >> 8) & 0xff];
	161	result = row ? row[uv & 0xff] : NULL;
	162	}
	163	if (result)
	164	num = (int)result; / assuming 0 <= num < 128 */
165	}
166
167	if (ix)
168	RETVAL = boolSV(num >0);
169	else
170	RETVAL = boolSV(num==0);
171	OUTPUT:
172	RETVAL
173
174
175	void
176	_getHexArray (src)
177	SV* src
178	PREINIT:
179	char s, e;
180	STRLEN byte;
181	UV value;
182	bool overflowed = FALSE;
183	const char *hexdigit;
184	PPCODE:
185	s = SvPV(src,byte);
186	for (e = s + byte; s < e;) {
187	hexdigit = strchr((char ) PL_hexdigit, s++);
188	if (! hexdigit)
189	continue;
190	value = (hexdigit - PL_hexdigit) & 0xF;
191	while (*s) {
192	hexdigit = strchr((char ) PL_hexdigit, s++);
193	if (! hexdigit)
194	break;
195	if (overflowed)
196	continue;
197	if (value > max_div_16) {
198	overflowed = TRUE;
199	continue;
200	}
201	value = (value << 4) \| ((hexdigit - PL_hexdigit) & 0xF);
202	}
203	XPUSHs(sv_2mortal(newSVuv(overflowed ? UV_MAX : value)));
204	}
205
206
207	SV*
208	_isIllegal (sv)
209	SV* sv
210	PREINIT:
211	UV uv;
212	CODE:
213	if (!sv \|\| !SvIOK(sv))
214	XSRETURN_YES;
215	uv = SvUVX(sv);
216	RETVAL = boolSV(
60f577e0	217	0x10FFFF < uv /* out of range */
4779e03e	218	\|\| ((uv & 0xFFFE) == 0xFFFE) /* ??FFF[EF] */
f58b9ef1 CBW	219	\|\| (0xD800 <= uv && uv <= 0xDFFF) /* unpaired surrogates */
	220	\|\| (0xFDD0 <= uv && uv <= 0xFDEF) /* other non-characters */
	221	);
	222	OUTPUT:
	223	RETVAL
	224
	225
	226	void
	227	_decompHangul (code)
	228	UV code
	229	PREINIT:
	230	UV sindex, lindex, vindex, tindex;
	231	PPCODE:
	232	/* code must be in Hangul syllable.
	233	* Check it before you enter here. */
	234	sindex = code - Hangul_SBase;
	235	lindex = sindex / Hangul_NCount;
	236	vindex = (sindex % Hangul_NCount) / Hangul_TCount;
	237	tindex = sindex % Hangul_TCount;
	238
	239	XPUSHs(sv_2mortal(newSVuv(lindex + Hangul_LBase)));
	240	XPUSHs(sv_2mortal(newSVuv(vindex + Hangul_VBase)));
	241	if (tindex)
	242	XPUSHs(sv_2mortal(newSVuv(tindex + Hangul_TBase)));
	243
	244
	245	SV*
	246	getHST (code, uca_vers = 0)
	247	UV code;
	248	IV uca_vers;
	249	PREINIT:
0cb4637e	250	const char * hangtype;
f58b9ef1 CBW	251	STRLEN typelen;
	252	CODE:
	253	if (codeRange(Hangul_SIni, Hangul_SFin)) {
	254	if ((code - Hangul_SBase) % Hangul_TCount) {
	255	hangtype = "LVT"; typelen = 3;
	256	} else {
	257	hangtype = "LV"; typelen = 2;
	258	}
	259	} else if (uca_vers < 20) {
	260	if (codeRange(Hangul_LIni, Hangul_LFin) \|\| code == Hangul_LFill) {
	261	hangtype = "L"; typelen = 1;
	262	} else if (codeRange(Hangul_VIni, Hangul_VFin)) {
	263	hangtype = "V"; typelen = 1;
	264	} else if (codeRange(Hangul_TIni, Hangul_TFin)) {
	265	hangtype = "T"; typelen = 1;
	266	} else {
	267	hangtype = ""; typelen = 0;
	268	}
	269	} else {
	270	if (codeRange(Hangul_LIni, Hangul_LEnd) \|\|
	271	codeRange(HangulL2Ini, HangulL2Fin)) {
	272	hangtype = "L"; typelen = 1;
	273	} else if (codeRange(Hangul_VIni, Hangul_VEnd) \|\|
	274	codeRange(HangulV2Ini, HangulV2Fin)) {
	275	hangtype = "V"; typelen = 1;
	276	} else if (codeRange(Hangul_TIni, Hangul_TEnd) \|\|
	277	codeRange(HangulT2Ini, HangulT2Fin)) {
	278	hangtype = "T"; typelen = 1;
	279	} else {
	280	hangtype = ""; typelen = 0;
	281	}
	282	}
	283
	284	RETVAL = newSVpvn(hangtype, typelen);
	285	OUTPUT:
	286	RETVAL
	287
	288
	289	void
	290	_derivCE_9 (code)
	291	UV code
	292	ALIAS:
	293	_derivCE_14 = 1
	294	_derivCE_18 = 2
	295	_derivCE_20 = 3
	296	_derivCE_22 = 4
cba8842c	297	_derivCE_24 = 5
f58b9ef1 CBW	298	PREINIT:
	299	UV base, aaaa, bbbb;
	300	U8 a[VCE_Length + 1] = "\x00\xFF\xFF\x00\x20\x00\x02\xFF\xFF";
	301	U8 b[VCE_Length + 1] = "\x00\xFF\xFF\x00\x00\x00\x00\xFF\xFF";
	302	bool basic_unified = 0;
	303	PPCODE:
	304	if (CJK_UidIni <= code) {
46267efc CBW	305	if (codeRange(CJK_CompIni, CJK_CompFin))
46267efc CBW	306	basic_unified = (bool)UnifiedCompat[code - CJK_CompIni];
f58b9ef1	307	else
cba8842c A	308	basic_unified = (ix >= 5 ? (code <= CJK_UidF61) :
cba8842c A	309	ix >= 3 ? (code <= CJK_UidF52) :
f58b9ef1 CBW	310	ix == 2 ? (code <= CJK_UidF51) :
	311	ix == 1 ? (code <= CJK_UidF41) :
	312	(code <= CJK_UidFin));
	313	}
	314	base = (basic_unified)
	315	? 0xFB40 : /* CJK */
	316	((codeRange(CJK_ExtAIni, CJK_ExtAFin))
	317	\|\|
	318	(codeRange(CJK_ExtBIni, CJK_ExtBFin))
	319	\|\|
	320	(ix >= 3 && codeRange(CJK_ExtCIni, CJK_ExtCFin))
	321	\|\|
	322	(ix >= 4 && codeRange(CJK_ExtDIni, CJK_ExtDFin)))
	323	? 0xFB80 /* CJK ext. */
	324	: 0xFBC0; /* others */
	325	aaaa = base + (code >> 15);
	326	bbbb = (code & 0x7FFF) \| 0x8000;
	327	a[1] = (U8)(aaaa >> 8);
	328	a[2] = (U8)(aaaa & 0xFF);
	329	b[1] = (U8)(bbbb >> 8);
	330	b[2] = (U8)(bbbb & 0xFF);
	331	a[7] = b[7] = (U8)(code >> 8);
	332	a[8] = b[8] = (U8)(code & 0xFF);
	333	XPUSHs(sv_2mortal(newSVpvn((char *) a, VCE_Length)));
	334	XPUSHs(sv_2mortal(newSVpvn((char *) b, VCE_Length)));
	335
	336
	337	void
	338	_derivCE_8 (code)
	339	UV code
	340	PREINIT:
	341	UV aaaa, bbbb;
	342	U8 a[VCE_Length + 1] = "\x00\xFF\xFF\x00\x02\x00\x01\xFF\xFF";
	343	U8 b[VCE_Length + 1] = "\x00\xFF\xFF\x00\x00\x00\x00\xFF\xFF";
	344	PPCODE:
	345	aaaa = 0xFF80 + (code >> 15);
	346	bbbb = (code & 0x7FFF) \| 0x8000;
	347	a[1] = (U8)(aaaa >> 8);
	348	a[2] = (U8)(aaaa & 0xFF);
	349	b[1] = (U8)(bbbb >> 8);
	350	b[2] = (U8)(bbbb & 0xFF);
	351	a[7] = b[7] = (U8)(code >> 8);
	352	a[8] = b[8] = (U8)(code & 0xFF);
	353	XPUSHs(sv_2mortal(newSVpvn((char *) a, VCE_Length)));
	354	XPUSHs(sv_2mortal(newSVpvn((char *) b, VCE_Length)));
	355
	356
	357	void
	358	_uideoCE_8 (code)
	359	UV code
	360	PREINIT:
	361	U8 uice[VCE_Length + 1] = "\x00\xFF\xFF\x00\x20\x00\x02\xFF\xFF";
	362	PPCODE:
	363	uice[1] = uice[7] = (U8)(code >> 8);
	364	uice[2] = uice[8] = (U8)(code & 0xFF);
	365	XPUSHs(sv_2mortal(newSVpvn((char *) uice, VCE_Length)));
	366
	367
	368	SV*
	369	_isUIdeo (code, uca_vers)
	370	UV code;
	371	IV uca_vers;
	372	bool basic_unified = 0;
	373	CODE:
374	/* uca_vers = 0 for _uideoCE_8() */
375	if (CJK_UidIni <= code) {
46267efc CBW	376	if (codeRange(CJK_CompIni, CJK_CompFin))
46267efc CBW	377	basic_unified = (bool)UnifiedCompat[code - CJK_CompIni];
f58b9ef1	378	else
cba8842c A	379	basic_unified = (uca_vers >= 24 ? (code <= CJK_UidF61) :
cba8842c A	380	uca_vers >= 20 ? (code <= CJK_UidF52) :
f58b9ef1 CBW	381	uca_vers >= 18 ? (code <= CJK_UidF51) :
	382	uca_vers >= 14 ? (code <= CJK_UidF41) :
	383	(code <= CJK_UidFin));
	384	}
	385	RETVAL = boolSV(
	386	(basic_unified)
	387	\|\|
	388	(codeRange(CJK_ExtAIni, CJK_ExtAFin))
	389	\|\|
	390	(uca_vers >= 8 && codeRange(CJK_ExtBIni, CJK_ExtBFin))
	391	\|\|
	392	(uca_vers >= 20 && codeRange(CJK_ExtCIni, CJK_ExtCFin))
	393	\|\|
	394	(uca_vers >= 22 && codeRange(CJK_ExtDIni, CJK_ExtDFin))
	395	);
	396	OUTPUT:
	397	RETVAL
	398
	399
	400	SV*
	401	mk_SortKey (self, buf)
	402	SV* self;
	403	SV* buf;
	404	PREINIT:
	405	SV dst, *svp;
	406	STRLEN dlen, vlen;
	407	U8 d, p, e, v, s[MaxLevel], eachlevel[MaxLevel];
	408	AV *bufAV;
	409	HV *selfHV;
	410	UV back_flag;
	411	I32 i, buf_len;
	412	IV lv, level, uca_vers;
	413	bool upper_lower, kata_hira, v2i, last_is_var;
	414	CODE:
	415	if (SvROK(self) && SvTYPE(SvRV(self)) == SVt_PVHV)
	416	selfHV = (HV*)SvRV(self);
	417	else
	418	croak("$self is not a HASHREF.");
	419
f58b9ef1 CBW	420	if (SvROK(buf) && SvTYPE(SvRV(buf)) == SVt_PVAV)
	421	bufAV = (AV*)SvRV(buf);
	422	else
	423	croak("XSUB, not an ARRAYREF.");
	424
	425	buf_len = av_len(bufAV);
	426
	427	if (buf_len < 0) { /* empty: -1 */
	428	dlen = 2 * (MaxLevel - 1);
	429	dst = newSV(dlen);
	430	(void)SvPOK_only(dst);
	431	d = (U8*)SvPVX(dst);
	432	while (dlen--)
	433	*d++ = '\0';
19265284 CBW	434	} else {
	435	svp = hv_fetch(selfHV, "level", 5, FALSE);
	436	level = svp ? SvIV(*svp) : MaxLevel;
	437
f58b9ef1 CBW	438	for (lv = 0; lv < level; lv++) {
	439	New(0, eachlevel[lv], 2 * (1 + buf_len) + 1, U8);
	440	s[lv] = eachlevel[lv];
	441	}
	442
	443	svp = hv_fetch(selfHV, "upper_before_lower", 18, FALSE);
	444	upper_lower = svp ? SvTRUE(*svp) : FALSE;
	445	svp = hv_fetch(selfHV, "katakana_before_hiragana", 24, FALSE);
	446	kata_hira = svp ? SvTRUE(*svp) : FALSE;
	447	svp = hv_fetch(selfHV, "UCA_Version", 11, FALSE);
	448	uca_vers = SvIV(*svp);
	449	svp = hv_fetch(selfHV, "variable", 8, FALSE);
	450	v2i = uca_vers >= 9 && svp /* (vers >= 9) and not (non-ignorable) */
	451	? !(SvCUR(svp) == 13 && memEQ(SvPVX(svp), "non-ignorable", 13))
	452	: FALSE;
	453
	454	last_is_var = FALSE;
	455	for (i = 0; i <= buf_len; i++) {
	456	svp = av_fetch(bufAV, i, FALSE);
	457
	458	if (svp && SvPOK(*svp))
	459	v = (U8)SvPV(svp, vlen);
	460	else
	461	croak("not a vwt.");
	462
	463	if (vlen < VCE_Length) /* ignore short VCE (unexpected) */
	464	continue;
	465
	466	/* "Ignorable (L1, L2) after Variable" since track. v. 9 */
	467	if (v2i) {
	468	if (*v)
	469	last_is_var = TRUE;
	470	else if (v[1] \|\| v[2]) /* non zero primary weight */
	471	last_is_var = FALSE;
	472	else if (last_is_var) /* zero primary weight; skipped */
	473	continue;
	474	}
	475
	476	if (v[5] == 0) { /* tert wt < 256 */
	477	if (upper_lower) {
	478	if (0x8 <= v[6] && v[6] <= 0xC) /* lower */
	479	v[6] -= 6;
	480	else if (0x2 <= v[6] && v[6] <= 0x6) /* upper */
	481	v[6] += 6;
	482	else if (v[6] == 0x1C) /* square upper */
	483	v[6]++;
	484	else if (v[6] == 0x1D) /* square lower */
	485	v[6]--;
	486	}
	487	if (kata_hira) {
	488	if (0x0F <= v[6] && v[6] <= 0x13) /* katakana */
	489	v[6] -= 2;
	490	else if (0xD <= v[6] && v[6] <= 0xE) /* hiragana */
	491	v[6] += 5;
	492	}
	493	}
	494
	495	for (lv = 0; lv < level; lv++) {
	496	if (v[2 * lv + 1] \|\| v[2 * lv + 2]) {
	497	s[lv]++ = v[2 lv + 1];
	498	s[lv]++ = v[2 lv + 2];
	499	}
	500	}
	501	}
502
503	dlen = 2 * (MaxLevel - 1);
504	for (lv = 0; lv < level; lv++)
505	dlen += s[lv] - eachlevel[lv];
506
507	dst = newSV(dlen);
508	(void)SvPOK_only(dst);
509	d = (U8*)SvPVX(dst);
510
511	svp = hv_fetch(selfHV, "backwardsFlag", 13, FALSE);
512	back_flag = svp ? SvUV(*svp) : (UV)0;
513
514	for (lv = 0; lv < level; lv++) {
515	if (back_flag & (1 << (lv + 1))) {
516	p = s[lv];
517	e = eachlevel[lv];
518	for ( ; e < p; p -= 2) {
519	*d++ = p[-2];
520	*d++ = p[-1];
521	}
522	}
523	else {
524	p = eachlevel[lv];
525	e = s[lv];
526	while (p < e)
527	d++ = p++;
528	}
529	if (lv + 1 < MaxLevel) { /* lv + 1 == real level */
530	*d++ = '\0';
531	*d++ = '\0';
532	}
533	}
534
535	for (lv = level; lv < MaxLevel; lv++) {
536	if (lv + 1 < MaxLevel) { /* lv + 1 == real level */
537	*d++ = '\0';
538	*d++ = '\0';
539	}
540	}
541
542	for (lv = 0; lv < level; lv++) {
543	Safefree(eachlevel[lv]);
544	}
545	}
546	*d = '\0';
547	SvCUR_set(dst, d - (U8*)SvPVX(dst));
548	RETVAL = dst;
549	OUTPUT:
550	RETVAL
551
552
553	SV*
19265284 CBW	554	varCE (self, vce)
	555	SV* self;
	556	SV* vce;
f58b9ef1	557	PREINIT:
19265284 CBW	558	SV dst, vbl, **svp;
19265284 CBW	559	HV *selfHV;
f58b9ef1 CBW	560	U8 a, v, *d;
f58b9ef1 CBW	561	STRLEN alen, vlen;
19265284 CBW	562	bool ig_l2;
19265284 CBW	563	UV totwt;
f58b9ef1	564	CODE:
19265284 CBW	565	if (SvROK(self) && SvTYPE(SvRV(self)) == SVt_PVHV)
	566	selfHV = (HV*)SvRV(self);
	567	else
	568	croak("$self is not a HASHREF.");
	569
	570	svp = hv_fetch(selfHV, "ignore_level2", 13, FALSE);
	571	ig_l2 = svp ? SvTRUE(*svp) : FALSE;
	572
	573	svp = hv_fetch(selfHV, "variable", 8, FALSE);
	574	vbl = svp ? *svp : &PL_sv_no;
f58b9ef1 CBW	575	a = (U8*)SvPV(vbl, alen);
	576	v = (U8*)SvPV(vce, vlen);
	577
	578	dst = newSV(vlen);
	579	d = (U8*)SvPVX(dst);
	580	(void)SvPOK_only(dst);
	581	Copy(v, d, vlen, U8);
	582	SvCUR_set(dst, vlen);
	583	d[vlen] = '\0';
	584
19265284 CBW	585	/* primary weight == 0 && secondary weight != 0 */
	586	if (ig_l2 && !d[1] && !d[2] && (d[3] \|\| d[4])) {
	587	d[3] = d[4] = d[5] = d[6] = '\0';
	588	}
	589
f58b9ef1 CBW	590	/* variable: checked only the first char and the length,
	591	trusting checkCollator() and %VariableOK in Perl ... */
	592
f8187d97 SH	593	if (vlen >= VCE_Length && *a != 'n') {
	594	if (*v) {
	595	if (a == 's') { / shifted or shift-trimmed */
750da838 CBW	596	d[7] = d[1]; /* wt level 1 to 4 */
750da838 CBW	597	d[8] = d[2];
f8187d97 SH	598	} /* else blanked */
	599	d[1] = d[2] = d[3] = d[4] = d[5] = d[6] = '\0';
	600	} else if (a == 's') { / shifted or shift-trimmed */
	601	totwt = d[1] + d[2] + d[3] + d[4] + d[5] + d[6];
	602	if (alen == 7 && totwt != 0) { /* shifted */
	603	if (d[1] == 0 && d[2] == 1) { /* XXX: CollationAuxiliary-6.2.0 */
	604	d[7] = d[1]; /* wt level 1 to 4 */
	605	d[8] = d[2];
	606	} else {
	607	d[7] = (U8)(Shift4Wt >> 8);
	608	d[8] = (U8)(Shift4Wt & 0xFF);
	609	}
	610	} else { /* shift-trimmed or completely ignorable */
	611	d[7] = d[8] = '\0';
750da838	612	}
f8187d97 SH	613	} /* else blanked */
f8187d97 SH	614	} /* else non-ignorable */
f58b9ef1 CBW	615	RETVAL = dst;
	616	OUTPUT:
	617	RETVAL
	618
	619
	620
	621	SV*
	622	visualizeSortKey (self, key)
	623	SV * self
	624	SV * key
	625	PREINIT:
	626	HV *selfHV;
	627	SV *svp, dst;
	628	U8 s, e, *d;
	629	STRLEN klen, dlen;
	630	UV uv;
750da838	631	IV uca_vers, sep = 0;
0cb4637e	632	static const char *upperhex = "0123456789ABCDEF";
f58b9ef1 CBW	633	CODE:
	634	if (SvROK(self) && SvTYPE(SvRV(self)) == SVt_PVHV)
	635	selfHV = (HV*)SvRV(self);
	636	else
	637	croak("$self is not a HASHREF.");
	638
	639	svp = hv_fetch(selfHV, "UCA_Version", 11, FALSE);
	640	if (!svp)
	641	croak("Panic: no $self->{UCA_Version} in visualizeSortKey");
	642	uca_vers = SvIV(*svp);
	643
	644	s = (U8*)SvPV(key, klen);
	645
	646	/* slightly longer than the need, but I'm afraid of miscounting;
750da838 CBW	647	= (klen / 2) * 5 - 1
	648	# FFFF and ' ' for each 16bit units but ' ' is less by 1;
	649	# ' ' and '\|' for level boundaries including the identical level
	650	+ 2 # '[' and ']'
	651	+ 1 # '\0'
	652	(a) if klen is odd (not expected), maybe more 5 bytes.
	653	(b) there is not always the identical level.
f58b9ef1 CBW	654	*/
	655	dlen = (klen / 2) * 5 + MaxLevel * 2 + 2;
	656	dst = newSV(dlen);
	657	(void)SvPOK_only(dst);
	658	d = (U8*)SvPVX(dst);
	659
	660	*d++ = '[';
	661	for (e = s + klen; s < e; s += 2) {
	662	uv = (U16)(*s << 8 \| s[1]);
750da838	663	if (uv \|\| sep >= MaxLevel) {
f58b9ef1 CBW	664	if ((d[-1] != '[') && ((9 <= uca_vers) \|\| (d[-1] != '\|')))
	665	*d++ = ' ';
	666	*d++ = upperhex[ (s[0] >> 4) & 0xF ];
	667	*d++ = upperhex[ s[0] & 0xF ];
	668	*d++ = upperhex[ (s[1] >> 4) & 0xF ];
	669	*d++ = upperhex[ s[1] & 0xF ];
750da838	670	} else {
f58b9ef1 CBW	671	if ((9 <= uca_vers) && (d[-1] != '['))
	672	*d++ = ' ';
	673	*d++ = '\|';
750da838	674	++sep;
f58b9ef1 CBW	675	}
	676	}
	677	*d++ = ']';
	678	*d = '\0';
	679	SvCUR_set(dst, d - (U8*)SvPVX(dst));
	680	RETVAL = dst;
	681	OUTPUT:
	682	RETVAL
	683
d2309057 CBW	684
	685
	686	void
	687	unpackUfor56 (src)
	688	SV* src
	689	PREINIT:
	690	STRLEN srclen, retlen;
	691	U8 s, p, *e;
	692	UV uv;
	693	PPCODE:
	694	s = (U8*)SvPV(src,srclen);
	695	if (!SvUTF8(src)) {
	696	SV* tmpsv = sv_mortalcopy(src);
	697	if (!SvPOK(tmpsv))
	698	(void)sv_pvn_force(tmpsv,&srclen);
	699	sv_utf8_upgrade(tmpsv);
	700	s = (U8*)SvPV(tmpsv,srclen);
	701	}
	702	e = s + srclen;
	703
	704	for (p = s; p < e; p += retlen) {
	705	uv = GET_UV_FOR_5_6; /* perl 5.6.x workaround */
	706	if (!retlen)
	707	croak("panic (Unicode::Collate): zero-length character");
	708	XPUSHs(sv_2mortal(newSVuv(uv)));
	709	}
	710