Import sources from 2011-03-30 iso image

1 files changed, 161 insertions, 0 deletions

diff --git a/sys/src/cmd/tcs/conv_ksc.c b/sys/src/cmd/tcs/conv_ksc.c
new file mode 100755
index 000000000..293ffad1a
--- /dev/null
+++ b/sys/src/cmd/tcs/conv_ksc.c
@@ -0,0 +1,161 @@
+#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	"ksc.h"
+
+/*
+	contributed by kuro@vodka.Eng.Sun.COM (Teruhiko Kurosaka)
+*/
+
+/*
+	a state machine for interpreting shift-ksc.
+*/
+
+#define	SS2	0x8e
+#define	SS3	0x8f
+/*
+ * Convert EUC in Koran locale to Unicode.
+ * Only codeset 0 and 1 are used.
+ */
+void
+ukscproc(int c, Rune **r, long input_loc)
+{
+	static enum { init, cs1last /*, cs2, cs3first, cs3last*/} state = init;
+	static int korean646 = 1; /* fixed to 1 for now. */
+	static int lastc;
+	int n;
+	long l;
+
+	switch(state)
+	{
+	case init:
+		if (c < 0){
+			return;
+		}else if (c < 128){
+			if(korean646 && (c=='\\')){
+				emit(0x20A9);
+			} else {
+				emit(c);
+			}
+/*		}else if (c==SS2){
+			state = cs2;
+		}else if (c==SS3){
+			state = cs3first;
+ */		}else{
+			lastc = c;
+			state = cs1last;
+		}
+		return;
+
+	case cs1last: /* 2nd byte of codeset 1 (KSC 5601) */
+		if(c < 0){
+			if(squawk)
+				EPR "%s: unexpected EOF in %s\n", argv0, file);
+			c = 0x21 | (lastc&0x80);
+		}
+		n = ((lastc&0x7f)-33)*94 + (c&0x7f)-33;
+ 		if((n >= ksc5601max) || ((l = tabksc5601[n]) < 0)){
+			nerrors++;
+			if(squawk)
+				EPR "%s: unknown ksc5601 %d (from 0x%x,0x%x) near byte %ld in %s\n", argv0, n, lastc, c, input_loc, file);
+			if(!clean)
+				emit(BADMAP);
+		} else {
+			emit(l);
+		}
+		state = init;
+		return;
+	default:
+		if(squawk)
+			EPR "%s: ukscproc: unknown state %d\n",
+				argv0, init);
+	}
+}
+
+void
+uksc_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++){
+			ukscproc(ibuf[i], &r, nin++);
+			if(r >= re){
+				OUT(out, ob, r-ob);
+				r = ob;
+			}
+		}
+		if(r > ob){
+			OUT(out, ob, r-ob);
+			r = ob;
+		}
+	}
+	ukscproc(-1, &r, nin);
+	if(r > ob)
+		OUT(out, ob, r-ob);
+	OUT(out, ob, 0);
+}
+
+void
+uksc_out(Rune *base, int n, long *notused)
+{
+	char *p;
+	int i;
+	Rune r;
+	long l;
+	static int first = 1;
+
+	USED(notused);
+	if(first){
+		first = 0;
+		for(i = 0; i < NRUNE; i++)
+			tab[i] = -1;
+		for(i = 0; i < ksc5601max; i++)
+			if((l = tabksc5601[i]) != -1){
+				if(l < 0)
+					tab[-l] = i;
+				else
+					tab[l] = i;
+			}
+	}
+	nrunes += n;
+	p = obuf;
+	for(i = 0; i < n; i++){
+		r = base[i];
+		if(r < 128)
+			*p++ = r;
+		else {
+			if(tab[r] != -1){
+				*p++ = 0x80 | (tab[r]/94 + 0x21);
+				*p++ = 0x80 | (tab[r]%94 + 0x21);
+				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);
+}
+