From 604c11affe988bab23c87598c02248fff1d73f43 Mon Sep 17 00:00:00 2001
From: Fumitoshi UKAI <ukai@debian.or.jp>
Date: Mon, 22 Sep 2003 21:02:15 +0000
Subject: merge m17n patch add libwc

---
 libwc/big5.c | 177 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 177 insertions(+)
 create mode 100644 libwc/big5.c

(limited to 'libwc/big5.c')

diff --git a/libwc/big5.c b/libwc/big5.c
new file mode 100644
index 0000000..ff3d336
--- /dev/null
+++ b/libwc/big5.c
@@ -0,0 +1,177 @@
+
+#include "wc.h"
+#include "big5.h"
+#include "search.h"
+#include "wtf.h"
+#ifdef USE_UNICODE
+#include "ucs.h"
+#endif
+
+#define C0 WC_BIG5_MAP_C0
+#define GL WC_BIG5_MAP_GL
+#define C1 WC_BIG5_MAP_C1
+#define LB WC_BIG5_MAP_LB
+#define UB WC_BIG5_MAP_UB
+
+wc_uint8 WC_BIG5_MAP[ 0x100 ] = {
+    C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0,
+    C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0,
+    GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL,
+    GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL,
+    LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB,
+    LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB,
+    LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB,
+    LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, C0,
+
+    C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
+    C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
+    C1, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB,
+    UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB,
+    UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB,
+    UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB,
+    UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB,
+    UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, C1,
+};
+
+wc_wchar_t
+wc_big5_to_cs94w(wc_wchar_t cc)
+{
+    cc.code = WC_BIG5_N(cc.code);
+    if (cc.code < WC_C_BIG5_2_BASE)
+	cc.ccs = WC_CCS_BIG5_1;
+    else {
+	cc.ccs = WC_CCS_BIG5_2;
+	cc.code -= WC_C_BIG5_2_BASE;
+    }
+    cc.code = WC_N_CS94W(cc.code);
+    return cc;
+}
+
+wc_wchar_t
+wc_cs94w_to_big5(wc_wchar_t cc)
+{
+    cc.code = WC_CS94W_N(cc.code);
+    if (cc.ccs == WC_CCS_BIG5_2)
+	cc.code += WC_C_BIG5_2_BASE;
+    cc.code = WC_N_BIG5(cc.code);
+    cc.ccs = WC_CCS_BIG5;
+    return cc;
+}
+
+Str
+wc_conv_from_big5(Str is, wc_ces ces)
+{
+    Str os;
+    wc_uchar *sp = (wc_uchar *)is->ptr;
+    wc_uchar *ep = sp + is->length;
+    wc_uchar *p;
+    int state = WC_BIG5_NOSTATE;
+
+    for (p = sp; p < ep && *p < 0x80; p++) 
+	;
+    if (p == ep)
+	return is;
+    os = Strnew_size(is->length);
+    if (p > sp)
+	Strcat_charp_n(os, (char *)is->ptr, (int)(p - sp));
+
+    for (; p < ep; p++) {
+	switch (state) {
+	case WC_BIG5_NOSTATE:
+	    switch (WC_BIG5_MAP[*p]) {
+	    case UB:
+		state = WC_BIG5_MBYTE1;
+		break;
+	    case C1:
+		wtf_push_unknown(os, p, 1);
+		break;
+	    default:
+		Strcat_char(os, (char)*p);
+		break;
+	    }
+	    break;
+	case WC_BIG5_MBYTE1:
+	    if (WC_BIG5_MAP[*p] & LB)
+		wtf_push(os, WC_CCS_BIG5, ((wc_uint32)*(p-1) << 8) | *p);
+	    else
+		wtf_push_unknown(os, p-1, 2);
+	    state = WC_BIG5_NOSTATE;
+	    break;
+	}
+    }
+    switch (state) {
+    case WC_BIG5_MBYTE1:
+	wtf_push_unknown(os, p-1, 1);
+	break;
+    }
+    return os;
+}
+
+void
+wc_push_to_big5(Str os, wc_wchar_t cc, wc_status *st)
+{
+  while (1) {
+    switch (cc.ccs) {
+    case WC_CCS_US_ASCII:
+	Strcat_char(os, (char)cc.code);
+	return;
+    case WC_CCS_BIG5_1:
+    case WC_CCS_BIG5_2:
+	cc = wc_cs94w_to_big5(cc);
+    case WC_CCS_BIG5:
+	Strcat_char(os, (char)(cc.code >> 8));
+	Strcat_char(os, (char)(cc.code & 0xff));
+	return;
+    case WC_CCS_UNKNOWN_W:
+	if (!WcOption.no_replace)
+	    Strcat_charp(os, WC_REPLACE_W);
+	return;
+    case WC_CCS_UNKNOWN:
+	if (!WcOption.no_replace)
+	    Strcat_charp(os, WC_REPLACE);
+	return;
+    default:
+#ifdef USE_UNICODE
+	if (WcOption.ucs_conv)
+	    cc = wc_any_to_any_ces(cc, st);
+	else
+#endif
+	    cc.ccs = WC_CCS_IS_WIDE(cc.ccs) ? WC_CCS_UNKNOWN_W : WC_CCS_UNKNOWN;
+	continue;
+    }
+  }
+}
+
+Str
+wc_char_conv_from_big5(wc_uchar c, wc_status *st)
+{
+    static Str os;
+    static wc_uchar big5u;
+
+    if (st->state == -1) {
+	st->state = WC_BIG5_NOSTATE;
+	os = Strnew_size(8);
+    }
+
+    switch (st->state) {
+    case WC_BIG5_NOSTATE:
+	switch (WC_BIG5_MAP[c]) {
+	case UB:
+	    big5u = c;
+	    st->state = WC_BIG5_MBYTE1;
+	    return NULL;
+	case C1:
+	    break;
+	default:
+	    Strcat_char(os, (char)c);
+	    break;
+	}
+	break;
+    case WC_BIG5_MBYTE1:
+	if (WC_BIG5_MAP[c] & LB)
+	    wtf_push(os, WC_CCS_BIG5, ((wc_uint32)big5u << 8) | c);
+	break;
+    }
+    st->state = -1;
+    return os;
+}
-- 
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