Subversion Repositories planix.SVN

#ifdef  PLAN9
#include        <u.h>
#include        <libc.h>
#include        <bio.h>
#else
#include        <stdio.h>
#include        <unistd.h>
#include        "plan9.h"
#endif
#include        "hdr.h"
#include        "conv.h"
#include        "gbk.h"

static void
gbkproc(int c, Rune **r, long input_loc)
{
        static enum { state0, state1 } state = state0;
        static int lastc;
        long ch, cold = c;

        switch(state)
        {
        case state0:    /* idle state */
                if(c < 0)
                        return;
                if(c >= 0x80){
                        lastc = c;
                        state = state1;
                        return;
                }
                emit(c);
                return;

        case state1:    /* seen a font spec */
                ch = -1;
                c = lastc<<8 | c;
                if(c >= GBKMIN && c < GBKMAX)
                        ch = tabgbk[c - GBKMIN];
                if(ch < 0){
                        nerrors++;
                        if(squawk)
                                EPR "%s: bad gbk glyph %d (from 0x%x,0x%lx) near byte %ld in %s\n", argv0, (c & 0xFF), lastc, cold, input_loc, file);
                        if(!clean)
                                emit(BADMAP);
                        state = state0;
                        return;
                }
                emit(ch);
                state = state0;
        }
}

void
gbk_in(int fd, long *notused, struct convert *out)
{
        Rune ob[N];
        Rune *r, *re;
        uchar ibuf[N];
        int n, i;
        long nin;

        USED(notused);
        r = ob;
        re = ob+N-3;
        nin = 0;
        while((n = read(fd, ibuf, sizeof ibuf)) > 0){
                for(i = 0; i < n; i++){
                        gbkproc(ibuf[i], &r, nin++);
                        if(r >= re){
                                OUT(out, ob, r-ob);
                                r = ob;
                        }
                }
                if(r > ob){
                        OUT(out, ob, r-ob);
                        r = ob;
                }
        }
        gbkproc(-1, &r, nin);
        if(r > ob)
                OUT(out, ob, r-ob);
        OUT(out, ob, 0);
}


void
gbk_out(Rune *base, int n, long *notused)
{
        char *p;
        int i;
        Rune r;
        static int first = 1;

        USED(notused);
        if(first){
                first = 0;
                for(i = 0; i < NRUNE; i++)
                        tab[i] = -1;
                for(i = GBKMIN; i < GBKMAX; i++)
                        tab[tabgbk[i-GBKMIN]] = i;
        }
        nrunes += n;
        p = obuf;
        for(i = 0; i < n; i++){
                r = base[i];
                if(r < 0x80)
                        *p++ = r;
                else {
                        if(tab[r] != -1){
                                r = tab[r];
                                *p++ = (r>>8) & 0xFF;
                                *p++ = r & 0xFF;
                                continue;
                        }
                        if(squawk)
                                EPR "%s: rune 0x%x not in output cs\n", argv0, r);
                        nerrors++;
                        if(clean)
                                continue;
                        *p++ = BYTEBADMAP;
                }
        }
        noutput += p-obuf;
        if(p > obuf)
                write(1, obuf, p-obuf);
}