#pragma prototyped

#include <cmd.h>

#include <wc.h>

#include <ctype.h>

#if _hdr_wchar && _hdr_wctype && _lib_iswctype

#include <wchar.h>

#include <wctype.h>

#include <lc.h>

#else

#ifndef iswspace

#define iswspace(x) isspace(x)

#endif

#endif

#define WC_SP 0x08

#define WC_NL 0x10

#define WC_MB 0x20

#define WC_ERR 0x40

#define eol(c) ((c)&WC_NL)

#define mbc(c) ((c)&WC_MB)

#define spc(c) ((c)&WC_SP)

#define mbwc(w,p,n) (*ast.mb_towc)(&w,(char*)p,n)

Wc_t* wc_init(int mode)

{

register int n;

register int w;

Wc_t* wp;

if (!(wp = (Wc_t*)stakalloc(sizeof(Wc_t))))

return 0;

if (!mbwide())

wp->mb = 0;

#if _hdr_wchar && _hdr_wctype && _lib_iswctype

else if (!(mode & WC_NOUTF8) && (lcinfo(LC_CTYPE)->lc->flags & LC_utf8))

wp->mb = 1;

#endif

else

wp->mb = -1;

w = mode & WC_WORDS;

for (n = (1<<CHAR_BIT); --n >= 0;)

wp->type[n] = (w && isspace(n)) ? WC_SP : 0;

wp->type['\n'] = WC_SP|WC_NL;

if ((mode & (WC_MBYTE|WC_WORDS)) && wp->mb > 0)

{

for (n = 0; n < 64; n++)

{

wp->type[0x80+n] |= WC_MB;

if (n<32)

wp->type[0xc0+n] |= WC_MB+1;

else if (n<48)

wp->type[0xc0+n] |= WC_MB+2;

else if (n<56)

wp->type[0xc0+n] |= WC_MB+3;

else if (n<60)

wp->type[0xc0+n] |= WC_MB+4;

else if (n<62)

wp->type[0xc0+n] |= WC_MB+5;

}

wp->type[0xc0] = WC_MB|WC_ERR;

wp->type[0xc1] = WC_MB|WC_ERR;

wp->type[0xfe] = WC_MB|WC_ERR;

wp->type[0xff] = WC_MB|WC_ERR;

}

wp->mode = mode;

return wp;

}

static int invalid(const char *file, int nlines)

{

error_info.file = (char*)file;

error_info.line = nlines;

error(ERROR_SYSTEM|1, "invalid multibyte character");

error_info.file = 0;

error_info.line = 0;

return nlines;

}

static int chkstate(int state, register unsigned int c)

{

switch(state)

{

case 1:

state = (c==0x9a?4:0);

break;

case 2:

state = ((c==0x80||c==0x81)?6+(c&1):0);

break;

case 3:

state = (c==0x80?5:0);

break;

case 4:

state = (c==0x80?10:0);

break;

case 5:

state = (c==0x80?10:0);

break;

case 6:

state = 0;

if(c==0xa0 || c==0xa1)

return(10);

else if((c&0xf0)== 0x80)

{

if((c&=0xf)==7)

return(iswspace(0x2007)?10:0);

if(c<=0xb)

return(10);

}

else if(c==0xaf && iswspace(0x202f))

return(10);

break;

case 7:

state = (c==0x9f?10:0);

break;

case 8:

return (iswspace(c)?10:0);

}

return state;

}

int wc_count(Wc_t *wp, Sfio_t *fd, const char* file)

{

register char* type = wp->type;

register unsigned char* cp;

register Sfoff_t nchars;

register Sfoff_t nwords;

register Sfoff_t nlines;

register Sfoff_t eline = -1;

register Sfoff_t longest = 0;

register ssize_t c;

register unsigned char* endbuff;

register int lasttype = WC_SP;

unsigned int lastchar;

ssize_t n;

ssize_t o;

unsigned char* buff;

wchar_t x;

unsigned char side[32];

sfset(fd,SF_WRITE,1);

nlines = nwords = nchars = 0;

wp->longest = 0;

if (wp->mb < 0 && (wp->mode & (WC_MBYTE|WC_WORDS)))

{

cp = buff = endbuff = 0;

for (;;)

{

if (cp >= endbuff || (n = mbwc(x, cp, endbuff-cp)) < 0)

{

if ((o = endbuff-cp) < sizeof(side))

{

if (buff)

{

if (o)

memcpy(side, cp, o);

mbinit();

}

else

o = 0;

cp = side + o;

if (!(buff = (unsigned char*)sfreserve(fd, SF_UNBOUND, 0)) || (n = sfvalue(fd)) <= 0)

{

if ((nchars - longest) > wp->longest)

wp->longest = nchars - longest;

break;

}

if ((c = sizeof(side) - o) > n)

c = n;

if (c)

memcpy(cp, buff, c);

endbuff = buff + n;

cp = side;

x = mbchar(cp);

if ((cp-side) < o)

{

cp = buff;

nchars += (cp-side) - 1;

}

else

cp = buff + (cp-side) - o;

}

else

{

cp++;

x = -1;

}

if (x == -1 && eline != nlines && !(wp->mode & WC_QUIET))

eline = invalid(file, nlines);

}

else

cp += n ? n : 1;

if (x == '\n')

{

if ((nchars - longest) > wp->longest)

wp->longest = nchars - longest;

longest = nchars + 1;

nlines++;

lasttype = 1;

}

else if (iswspace(x))

lasttype = 1;

else if (lasttype)

{

lasttype = 0;

nwords++;

}

nchars++;

}

}

else if (!wp->mb && !(wp->mode & WC_LONGEST) || wp->mb > 0 && !(wp->mode & (WC_MBYTE|WC_WORDS|WC_LONGEST)))

{

if (!(wp->mode & (WC_MBYTE|WC_WORDS|WC_LONGEST)))

{

while ((cp = (unsigned char*)sfreserve(fd, SF_UNBOUND, 0)) && (c = sfvalue(fd)) > 0)

{

nchars += c;

endbuff = cp + c;

if (*--endbuff == '\n')

nlines++;

else

*endbuff = '\n';

for (;;)

if (*cp++ == '\n')

{

if (cp > endbuff)

break;

nlines++;

}

}

}

else

{

while ((cp = buff = (unsigned char*)sfreserve(fd, SF_UNBOUND, 0)) && (c = sfvalue(fd)) > 0)

{

nchars += c;

/* check to see whether first character terminates word */

if (c==1)

{

if (eol(lasttype))

nlines++;

if ((c = type[*cp]) && !lasttype)

nwords++;

lasttype = c;

continue;

}

if (!lasttype && type[*cp])

nwords++;

lastchar = cp[--c];

*(endbuff = cp+c) = '\n';

c = lasttype;

/* process each buffer */

for (;;)

{

/* process spaces and new-lines */

do

{

if (eol(c))

for (;;)

{

/* check for end of buffer */

if (cp > endbuff)

goto beob;

nlines++;

if (*cp != '\n')

break;

cp++;

}

} while (c = type[*cp++]);

/* skip over word characters */

while (!(c = type[*cp++]));

nwords++;

}

beob:

if ((cp -= 2) >= buff)

c = type[*cp];

else

c = lasttype;

lasttype = type[lastchar];

/* see if was in word */

if (!c && !lasttype)

nwords--;

}

if (eol(lasttype))

nlines++;

else if (!lasttype)

nwords++;

}

}

else

{

int lineoff=0;

int skip=0;

int adjust=0;

int state=0;

int oldc;

int xspace;

int wasspace = 1;

unsigned char* start;

lastchar = 0;

start = (endbuff = side) + 1;

xspace = iswspace(0xa0) || iswspace(0x85);

while ((cp = buff = (unsigned char*)sfreserve(fd, SF_UNBOUND, 0)) && (c = sfvalue(fd)) > 0)

{

nchars += c;

start = cp-lineoff;

/* check to see whether first character terminates word */

if(c==1)

{

if(eol(lasttype))

nlines++;

if((c = type[*cp]) && !lasttype)

nwords++;

lasttype = c;

endbuff = start;

continue;

}

lastchar = cp[--c];

endbuff = cp+c;

cp[c] = '\n';

if(mbc(lasttype))

{

c = lasttype;

goto mbyte;

}

if(!lasttype && spc(type[*cp]))

nwords++;

c = lasttype;

/* process each buffer */

for (;;)

{

/* process spaces and new-lines */

spaces:

do

{

if (eol(c))

{

/* check for end of buffer */

if (cp > endbuff)

goto eob;

if(wp->mode&WC_LONGEST)

{

if((cp-start)-adjust > longest)

longest = (cp-start)-adjust-1;

start = cp;

}

nlines++;

nchars -= adjust;

adjust = 0;

}

} while (spc(c = type[*cp++]));

wasspace=1;

if(mbc(c))

{

mbyte:

do

{

if(c&WC_ERR)

goto err;

if(skip && (c&7))

break;

if(!skip)

{

if(!(c&7))

{

skip=1;

break;

}

skip = (c&7);

adjust += skip;

state = 0;

if(skip==2 && (cp[-1]&0xc)==0 && (state=(cp[-1]&0x3)))

oldc = *cp;

else if(xspace && cp[-1]==0xc2)

{

state = 8;

oldc = *cp;

}

}

else

{

skip--;

if(state && (state=chkstate(state,oldc)))

{

if(state==10)

{

if(!wasspace)

nwords++;

wasspace = 1;

state=0;

goto spaces;

}

oldc = *cp;

}

}

} while (mbc(c = type[*cp++]));

wasspace = 0;

if(skip)

{

if(eol(c) && (cp > endbuff))

goto eob;

err:

skip = 0;

state = 0;

if(eline!=nlines && !(wp->mode & WC_QUIET))

eline = invalid(file, nlines);

while(mbc(c) && ((c|WC_ERR) || (c&7)==0))

c=type[*cp++];

if(eol(c) && (cp > endbuff))

{

c = WC_MB|WC_ERR;

goto eob;

}

if(mbc(c))

goto mbyte;

else if(c&WC_SP)

goto spaces;

}

if(spc(c))

{

nwords++;

continue;

}

}

/* skip over word characters */

while(!(c = type[*cp++]));

if(mbc(c))

goto mbyte;

nwords++;

}

eob:

lineoff = cp-start;

if((cp -= 2) >= buff)

c = type[*cp];

else

c = lasttype;

lasttype = type[lastchar];

/* see if was in word */

if(!c && !lasttype)

nwords--;

}

if ((wp->mode&WC_LONGEST) && ((endbuff + 1 - start) - adjust - (lastchar == '\n')) > longest)

longest = (endbuff + 1 - start) - adjust - (lastchar == '\n');

wp->longest = longest;

if (eol(lasttype))

nlines++;

else if (!lasttype)

nwords++;

nchars -= adjust;

}

wp->chars = nchars;

wp->words = nwords;

wp->lines = nlines;

return 0;

}