ref: 5c1feb0ef0b795e5de71e956f9ccddcd5c4b7f21
dir: /sys/src/cmd/tcs/conv_jis.c/
#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 "kuten208.h"
#include "jis.h"
/*
a state machine for interpreting all sorts of encodings
*/
static void
alljis(int c, Rune **r, long input_loc)
{
static enum { state0, state1, state2, state3, state4 } state = state0;
static int set8 = 0;
static int japan646 = 0;
static int lastc;
int n;
long l;
again:
switch(state)
{
case state0: /* idle state */
if(c == ESC){ state = state1; return; }
if(c < 0) return;
if(!set8 && (c < 128)){
if(japan646){
switch(c)
{
case '\\': emit(0xA5); return; /* yen */
case '~': emit(0xAF); return; /* spacing macron */
default: emit(c); return;
}
} else {
emit(c);
return;
}
}
if(c < 0x21){ /* guard against bogus characters in JIS mode */
if(squawk)
EPR "%s: non-JIS character %02x in %s near byte %ld\n", argv0, c, file, input_loc);
emit(c);
return;
}
lastc = c; state = state4; return;
case state1: /* seen an escape */
if(c == '$'){ state = state2; return; }
if(c == '('){ state = state3; return; }
emit(ESC); state = state0; goto again;
case state2: /* may be shifting into JIS */
if((c == '@') || (c == 'B')){
set8 = 1; state = state0; return;
}
emit(ESC); emit('$'); state = state0; goto again;
case state3: /* may be shifting out of JIS */
if((c == 'J') || (c == 'H') || (c == 'B')){
japan646 = (c == 'J');
set8 = 0; state = state0; return;
}
emit(ESC); emit('('); state = state0; goto again;
case state4: /* two part char */
if(c < 0){
if(squawk)
EPR "%s: unexpected EOF in %s\n", argv0, file);
c = 0x21 | (lastc&0x80);
}
if(CANS2J(lastc, c)){ /* ms dos sjis */
int hi = lastc, lo = c;
S2J(hi, lo); /* convert to 208 */
n = hi*100 + lo - 3232; /* convert to kuten208 */
} else
n = (lastc&0x7F)*100 + (c&0x7f) - 3232; /* kuten208 */
if((n >= KUTEN208MAX) || ((l = tabkuten208[n]) == -1)){
nerrors++;
if(squawk)
EPR "%s: unknown kuten208 %d (from 0x%x,0x%x) near byte %ld in %s\n", argv0, n, lastc, c, input_loc, file);
if(!clean)
emit(BADMAP);
} else {
if(l < 0){
l = -l;
if(squawk)
EPR "%s: ambiguous kuten208 %d (mapped to 0x%lx) near byte %ld in %s\n", argv0, n, l, input_loc, file);
}
emit(l);
}
state = state0;
}
}
/*
a state machine for interpreting ms-kanji == shift-jis.
*/
static void
ms(int c, Rune **r, long input_loc)
{
static enum { state0, state1, state2, state3, state4 } state = state0;
static int set8 = 0;
static int japan646 = 0;
static int lastc;
int n;
long l;
again:
switch(state)
{
case state0: /* idle state */
if(c == ESC){ state = state1; return; }
if(c < 0) return;
if(!set8 && (c < 128)){
if(japan646){
switch(c)
{
case '\\': emit(0xA5); return; /* yen */
case '~': emit(0xAF); return; /* spacing macron */
default: emit(c); return;
}
} else {
emit(c);
return;
}
}
lastc = c; state = state4; return;
case state1: /* seen an escape */
if(c == '$'){ state = state2; return; }
if(c == '('){ state = state3; return; }
emit(ESC); state = state0; goto again;
case state2: /* may be shifting into JIS */
if((c == '@') || (c == 'B')){
set8 = 1; state = state0; return;
}
emit(ESC); emit('$'); state = state0; goto again;
case state3: /* may be shifting out of JIS */
if((c == 'J') || (c == 'H') || (c == 'B')){
japan646 = (c == 'J');
set8 = 0; state = state0; return;
}
emit(ESC); emit('('); state = state0; goto again;
case state4: /* two part char */
if(c < 0){
if(squawk)
EPR "%s: unexpected EOF in %s\n", argv0, file);
c = 0x21 | (lastc&0x80);
}
if(CANS2J(lastc, c)){ /* ms dos sjis */
int hi = lastc, lo = c;
S2J(hi, lo); /* convert to 208 */
n = hi*100 + lo - 3232; /* convert to kuten208 */
} else {
nerrors++;
if(squawk)
EPR "%s: illegal byte pair (0x%x,0x%x) near byte %ld in %s\n", argv0, lastc, c, input_loc, file);
if(!clean)
emit(BADMAP);
state = state0;
goto again;
}
if((n >= KUTEN208MAX) || ((l = tabkuten208[n]) == -1)){
nerrors++;
if(squawk)
EPR "%s: unknown kuten208 %d (from 0x%x,0x%x) near byte %ld in %s\n", argv0, n, lastc, c, input_loc, file);
if(!clean)
emit(BADMAP);
} else {
if(l < 0){
l = -l;
if(squawk)
EPR "%s: ambiguous kuten208 %d (mapped to 0x%lx) near byte %ld in %s\n", argv0, n, l, input_loc, file);
}
emit(l);
}
state = state0;
}
}
/*
a state machine for interpreting ujis == EUC
*/
static void
ujis(int c, Rune **r, long input_loc)
{
static enum { state0, state1 } state = state0;
static int lastc;
int n;
long l;
switch(state)
{
case state0: /* idle state */
if(c < 0) return;
if(c < 128){
emit(c);
return;
}
if(c == 0x8e){ /* codeset 2 */
nerrors++;
if(squawk)
EPR "%s: unknown codeset 2 near byte %ld in %s\n", argv0, input_loc, file);
if(!clean)
emit(BADMAP);
return;
}
if(c == 0x8f){ /* codeset 3 */
nerrors++;
if(squawk)
EPR "%s: unknown codeset 3 near byte %ld in %s\n", argv0, input_loc, file);
if(!clean)
emit(BADMAP);
return;
}
lastc = c;
state = state1;
return;
case state1: /* two part char */
if(c < 0){
if(squawk)
EPR "%s: unexpected EOF in %s\n", argv0, file);
c = 0xA1;
}
n = (lastc&0x7F)*100 + (c&0x7F) - 3232; /* kuten208 */
if((n >= KUTEN208MAX) || ((l = tabkuten208[n]) == -1)){
nerrors++;
if(squawk)
EPR "%s: unknown kuten208 %d (from 0x%x,0x%x) near byte %ld in %s\n", argv0, n, lastc, c, input_loc, file);
if(!clean)
emit(BADMAP);
} else {
if(l < 0){
l = -l;
if(squawk)
EPR "%s: ambiguous kuten208 %d (mapped to 0x%lx) near byte %ld in %s\n", argv0, n, l, input_loc, file);
}
emit(l);
}
state = state0;
}
}
/*
a state machine for interpreting jis-kanji == 2022-JP
*/
static void
jis(int c, Rune **r, long input_loc)
{
static enum { state0, state1, state2, state3, state4 } state = state0;
static int set8 = 0;
static int japan646 = 0;
static int lastc;
int n;
long l;
again:
switch(state)
{
case state0: /* idle state */
if(c == ESC){ state = state1; return; }
if(c < 0) return;
if(!set8 && (c < 128)){
if(japan646){
switch(c)
{
case '\\': emit(0xA5); return; /* yen */
case '~': emit(0xAF); return; /* spacing macron */
default: emit(c); return;
}
} else {
emit(c);
return;
}
}
lastc = c; state = state4; return;
case state1: /* seen an escape */
if(c == '$'){ state = state2; return; }
if(c == '('){ state = state3; return; }
emit(ESC); state = state0; goto again;
case state2: /* may be shifting into JIS */
if((c == '@') || (c == 'B')){
set8 = 1; state = state0; return;
}
emit(ESC); emit('$'); state = state0; goto again;
case state3: /* may be shifting out of JIS */
if((c == 'J') || (c == 'H') || (c == 'B')){
japan646 = (c == 'J');
set8 = 0; state = state0; return;
}
emit(ESC); emit('('); state = state0; goto again;
case state4: /* two part char */
if(c < 0){
if(squawk)
EPR "%s: unexpected EOF in %s\n", argv0, file);
c = 0x21 | (lastc&0x80);
}
if((lastc&0x80) != (c&0x80)){ /* guard against latin1 in jis */
emit(lastc);
state = state0;
goto again;
}
n = (lastc&0x7F)*100 + (c&0x7f) - 3232; /* kuten208 */
if((n >= KUTEN208MAX) || ((l = tabkuten208[n]) == -1)){
nerrors++;
if(squawk)
EPR "%s: unknown kuten208 %d (from 0x%x,0x%x) near byte %ld in %s\n", argv0, n, lastc, c, input_loc, file);
if(!clean)
emit(BADMAP);
} else {
if(l < 0){
l = -l;
if(squawk)
EPR "%s: ambiguous kuten208 %d (mapped to 0x%lx) near byte %ld in %s\n", argv0, n, l, input_loc, file);
}
emit(l);
}
state = state0;
}
}
static void
do_in(int fd, void (*procfn)(int, Rune **, long), struct convert *out)
{
Rune ob[N];
Rune *r, *re;
uchar ibuf[N];
int n, i;
long nin;
r = ob;
re = ob+N-3;
nin = 0;
while((n = read(fd, ibuf, sizeof ibuf)) > 0){
for(i = 0; i < n; i++){
(*procfn)(ibuf[i], &r, nin++);
if(r >= re){
OUT(out, ob, r-ob);
r = ob;
}
}
if(r > ob){
OUT(out, ob, r-ob);
r = ob;
}
}
(*procfn)(-1, &r, nin);
if(r > ob)
OUT(out, ob, r-ob);
OUT(out, ob, 0);
}
void
jis_in(int fd, long *, struct convert *out)
{
do_in(fd, alljis, out);
}
void
ujis_in(int fd, long *, struct convert *out)
{
do_in(fd, ujis, out);
}
void
msjis_in(int fd, long *, struct convert *out)
{
do_in(fd, ms, out);
}
void
jisjis_in(int fd, long *, struct convert *out)
{
do_in(fd, jis, out);
}
static int first = 1;
static void
tab_init(void)
{
int i;
long l;
first = 0;
for(i = 0; i < NRUNE; i++)
tab[i] = -1;
for(i = 0; i < KUTEN208MAX; i++)
if((l = tabkuten208[i]) != -1){
if(l < 0)
tab[-l] = i;
else
tab[l] = i;
}
}
/* jis-kanji, or ISO 2022-JP */
void
jisjis_out(Rune *base, int n, long *)
{
char *p;
int i;
Rune r;
static enum { ascii, japan646, jp2022 } state = ascii;
if(first)
tab_init();
nrunes += n;
p = obuf;
for(i = 0; i < n; i++){
r = base[i];
if(r < 128){
if(state == jp2022){
*p++ = ESC; *p++ = '('; *p++ = 'B';
state = ascii;
}
*p++ = r;
} else {
if(r < NRUNE && tab[r] != -1){
if(state != jp2022){
*p++ = ESC; *p++ = '$'; *p++ = 'B';
state = jp2022;
}
*p++ = tab[r]/100 + ' ';
*p++ = tab[r]%100 + ' ';
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);
}
/* ms-kanji, or Shift-JIS */
void
msjis_out(Rune *base, int n, long *)
{
char *p;
int i, hi, lo;
Rune r;
if(first)
tab_init();
nrunes += n;
p = obuf;
for(i = 0; i < n; i++){
r = base[i];
if(r < 128)
*p++ = r;
else {
if(r < NRUNE && tab[r] != -1){
hi = tab[r]/100 + ' ';
lo = tab[r]%100 + ' ';
J2S(hi, lo);
*p++ = hi;
*p++ = lo;
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);
}
/* ujis, or EUC */
void
ujis_out(Rune *base, int n, long *)
{
char *p;
int i;
Rune r;
if(first)
tab_init();
nrunes += n;
p = obuf;
for(i = 0; i < n; i++){
r = base[i];
if(r < 128)
*p++ = r;
else {
if(r < NRUNE && tab[r] != -1){
*p++ = 0x80 | (tab[r]/100 + ' ');
*p++ = 0x80 | (tab[r]%100 + ' ');
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);
}