merge m17n patch

add libwc

1 files changed, 376 insertions, 0 deletions

diff --git a/libwc/gb18030.c b/libwc/gb18030.c
new file mode 100644
index 0000000..c195d49
--- /dev/null
+++ b/libwc/gb18030.c
@@ -0,0 +1,376 @@
+
+#include "wc.h"
+#include "gb18030.h"
+#include "search.h"
+#include "wtf.h"
+#ifdef USE_UNICODE
+#include "ucs.h"
+#endif
+#include "map/gb18030_ucs.map"
+
+#define C0 WC_GB18030_MAP_C0
+#define GL WC_GB18030_MAP_GL
+#define C1 WC_GB18030_MAP_C1
+#define LB WC_GB18030_MAP_LB
+#define UB WC_GB18030_MAP_UB
+#define L4 WC_GB18030_MAP_L4
+
+wc_uint8 WC_GB18030_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,
+    L4, L4, L4, L4, L4, L4, L4, L4, L4, L4, 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,
+
+    LB, 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, 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_gbk_ext_to_cs128w(wc_wchar_t cc)
+{
+    cc.code = WC_GBK_N(cc.code);
+    if (cc.code < 0x4000)
+	cc.ccs = WC_CCS_GBK_EXT_1;
+    else {
+	cc.ccs = WC_CCS_GBK_EXT_2;
+	cc.code -= 0x4000;
+    }
+    cc.code = WC_N_CS128W(cc.code);
+    return cc;
+}
+
+wc_wchar_t
+wc_cs128w_to_gbk_ext(wc_wchar_t cc)
+{
+    cc.code = WC_CS128W_N(cc.code);
+    if (cc.ccs == WC_CCS_GBK_EXT_2)
+	cc.code += 0x4000;
+    cc.ccs = WC_CCS_GBK_EXT;
+    cc.code = WC_N_GBK(cc.code);
+    return cc;
+}
+
+static wc_ccs
+wc_gbk_or_gbk_ext(wc_uint16 code) {
+    return wc_map3_range_search(code,
+        gbk_ext_ucs_map, N_gbk_ext_ucs_map)
+        ? WC_CCS_GBK_EXT : WC_CCS_GBK;
+}
+
+#ifdef USE_UNICODE
+wc_uint32
+wc_gb18030_to_ucs(wc_wchar_t cc)
+{
+    wc_map3 *map;
+
+    switch (WC_CCS_SET(cc.ccs)) {
+    case WC_CCS_GBK_EXT_1:
+    case WC_CCS_GBK_EXT_2:
+	cc = wc_cs128w_to_gbk_ext(cc);
+    case WC_CCS_GBK_EXT:
+	map = wc_map3_range_search((wc_uint16)cc.code,
+		gbk_ext_ucs_map, N_gbk_ext_ucs_map);
+	if (map)
+	    return map->code3 + WC_GBK_N(cc.code) - WC_GBK_N(map->code2);
+	return WC_C_UCS4_ERROR;
+    case WC_CCS_GB18030:
+	break;
+    default:
+	return wc_any_to_ucs(cc);
+    }
+    if (cc.code >= WC_C_GB18030_UCS2 && cc.code <= WC_C_GB18030_UCS2_END) {
+	int i, min = 0, max = N_ucs_gb18030_map - 1;
+
+	cc.code = WC_GB18030_N(cc.code) - WC_GB18030_N(WC_C_GB18030_UCS2);
+	if (cc.code >= ucs_gb18030_map[max].code3)
+	    i = max;
+	else {
+	    while(1) {
+		i = (min + max) / 2;
+		if (min == max)
+		    break;
+		if (cc.code < ucs_gb18030_map[i].code3)
+		    max = i - 1;
+		else if (cc.code >= ucs_gb18030_map[i+1].code3)
+		    min = i + 1;
+		else
+		    break;
+	    }
+	}
+	return ucs_gb18030_map[i].code + cc.code - ucs_gb18030_map[i].code3;
+    }
+    if (cc.code >= WC_C_GB18030_UCS4 && cc.code <= WC_C_GB18030_UCS4_END)
+	return WC_GB18030_N(cc.code) - WC_GB18030_N(WC_C_GB18030_UCS4)
+		+ 0x10000;
+    return WC_C_UCS4_ERROR;
+}
+
+wc_wchar_t
+wc_ucs_to_gb18030(wc_uint32 ucs)
+{
+    wc_wchar_t cc;
+    wc_map3 *map;
+
+    if (ucs <= WC_C_UCS2_END) {
+	map = wc_map3_range_search((wc_uint16)ucs,
+		ucs_gbk_ext_map, N_ucs_gbk_ext_map);
+	if (map) {
+	    cc.code = WC_GBK_N(map->code3) + ucs - map->code;
+	    cc.code = WC_N_GBK(cc.code);
+	    cc.ccs = WC_CCS_GBK_EXT;
+	    return cc;
+	}
+	map = wc_map3_range_search((wc_uint16)ucs,
+		ucs_gb18030_map, N_ucs_gb18030_map);
+	if (map) {
+	    cc.code = map->code3 + ucs - map->code + WC_GB18030_N(WC_C_GB18030_UCS2);
+	    cc.code = WC_N_GB18030(cc.code);
+	    if (WcOption.gb18030_as_ucs)
+		cc.ccs = WC_CCS_GB18030 | (wc_ucs_to_ccs(ucs) & ~WC_CCS_A_SET);
+	    else
+		cc.ccs = WC_CCS_GB18030_W;
+	    return cc;
+	}
+    } else if (ucs <= WC_C_UNICODE_END) {
+	cc.code = ucs - 0x10000 + WC_GB18030_N(WC_C_GB18030_UCS4);
+	cc.code = WC_N_GB18030(cc.code);
+	if (WcOption.gb18030_as_ucs)
+	    cc.ccs = WC_CCS_GB18030 | (wc_ucs_to_ccs(ucs) & ~WC_CCS_A_SET);
+	else
+	    cc.ccs = WC_CCS_GB18030_W;
+	return cc;
+    }
+    cc.ccs = WC_CCS_UNKNOWN;
+    return cc;
+}
+#endif
+
+Str
+wc_conv_from_gb18030(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_GB18030_NOSTATE;
+    wc_uint32 gbk;
+    wc_wchar_t cc;
+#ifdef USE_UNICODE
+    wc_uint32 ucs;
+#endif
+
+    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_GB18030_NOSTATE:
+	    switch (WC_GB18030_MAP[*p]) {
+	    case UB:
+		state = WC_GB18030_MBYTE1;
+		break;
+	    case C1:
+		wtf_push_unknown(os, p, 1);
+		break;
+	    default:
+		Strcat_char(os, (char)*p);
+		break;
+	    }
+	    break;
+	case WC_GB18030_MBYTE1:
+	    if (WC_GB18030_MAP[*p] & LB) {
+		gbk = ((wc_uint32)*(p-1) << 8) | *p;
+		if (wc_gbk_or_gbk_ext(gbk) == WC_CCS_GBK_EXT)
+		    wtf_push(os, WC_CCS_GBK_EXT, gbk);
+		else if (*(p-1) >= 0xA1 && *p >= 0xA1)
+		    wtf_push(os, wc_gb2312_or_gbk(gbk), gbk);
+		else
+		    wtf_push(os, WC_CCS_GBK, gbk);
+	    } else if (WC_GB18030_MAP[*p] == L4) {
+		state = WC_GB18030_MBYTE2;
+		break;
+	    } else
+		wtf_push_unknown(os, p-1, 2);
+	    state = WC_GB18030_NOSTATE;
+	    break;
+	case WC_GB18030_MBYTE2:
+	    if (WC_GB18030_MAP[*p] == UB) {
+		state = WC_GB18030_MBYTE3;
+		break;
+	    } else
+		wtf_push_unknown(os, p-2, 3);
+	    state = WC_GB18030_NOSTATE;
+	    break;
+	case WC_GB18030_MBYTE3:
+	    if (WC_GB18030_MAP[*p] == L4) {
+		cc.ccs = WC_CCS_GB18030_W;
+		cc.code = ((wc_uint32)*(p-3) << 24)
+		        | ((wc_uint32)*(p-2) << 16)
+		        | ((wc_uint32)*(p-1) << 8)
+		        | *p;
+#ifdef USE_UNICODE
+		if (WcOption.gb18030_as_ucs &&
+		    (ucs = wc_gb18030_to_ucs(cc)) != WC_C_UCS4_ERROR)
+		    wtf_push(os, WC_CCS_GB18030 | (wc_ucs_to_ccs(ucs) & ~WC_CCS_A_SET), cc.code);
+		else
+#endif
+		    wtf_push(os, cc.ccs, cc.code);
+	    } else
+		wtf_push_unknown(os, p-3, 4);
+	    state = WC_GB18030_NOSTATE;
+	    break;
+	}
+    }
+    switch (state) {
+    case WC_GB18030_MBYTE1:
+	wtf_push_unknown(os, p-1, 1);
+	break;
+    case WC_GB18030_MBYTE2:
+	wtf_push_unknown(os, p-2, 2);
+	break;
+    case WC_GB18030_MBYTE3:
+	wtf_push_unknown(os, p-3, 3);
+	break;
+    }
+    return os;
+}
+
+void
+wc_push_to_gb18030(Str os, wc_wchar_t cc, wc_status *st)
+{
+  while (1) {
+    switch (WC_CCS_SET(cc.ccs)) {
+    case WC_CCS_US_ASCII:
+	Strcat_char(os, (char)cc.code);
+	return;
+    case WC_CCS_GB_2312:
+	Strcat_char(os, (char)((cc.code >> 8) | 0x80));
+	Strcat_char(os, (char)((cc.code & 0xff) | 0x80));
+	return;
+    case WC_CCS_GBK_1:
+    case WC_CCS_GBK_2:
+	cc = wc_cs128w_to_gbk(cc);
+    case WC_CCS_GBK:
+	Strcat_char(os, (char)(cc.code >> 8));
+	Strcat_char(os, (char)(cc.code & 0xff));
+	return;
+    case WC_CCS_GBK_EXT_1:
+    case WC_CCS_GBK_EXT_2:
+	cc = wc_cs128w_to_gbk(cc);
+    case WC_CCS_GBK_EXT:
+	Strcat_char(os, (char)(cc.code >> 8));
+	Strcat_char(os, (char)(cc.code & 0xff));
+	return;
+    case WC_CCS_GB18030:
+	Strcat_char(os, (char)((cc.code >> 24) & 0xff));
+	Strcat_char(os, (char)((cc.code >> 16) & 0xff));
+	Strcat_char(os, (char)((cc.code >> 8)  & 0xff));
+	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_gb18030(wc_uchar c, wc_status *st)
+{
+    static Str os;
+    static wc_uchar gb[4];
+    wc_uint32 gbk;
+    wc_wchar_t cc;
+#ifdef USE_UNICODE
+    wc_uint32 ucs;
+#endif
+
+    if (st->state == -1) {
+	st->state = WC_GB18030_NOSTATE;
+	os = Strnew_size(8);
+    }
+
+    switch (st->state) {
+    case WC_GB18030_NOSTATE:
+	switch (WC_GB18030_MAP[c]) {
+	case UB:
+	    gb[0] = c;
+	    st->state = WC_GB18030_MBYTE1;
+	    return NULL;
+	case C1:
+	    break;
+	default:
+	    Strcat_char(os, (char)c);
+	    break;
+	}
+	break;
+    case WC_GB18030_MBYTE1:
+	if (WC_GB18030_MAP[c] & LB) {
+	    gbk = ((wc_uint32)gb[0] << 8) | c;
+	    if (wc_gbk_or_gbk_ext(gbk) == WC_CCS_GBK_EXT)
+		wtf_push(os, WC_CCS_GBK_EXT, gbk);
+	    else if (gb[0] >= 0xA1 && c >= 0xA1)
+		wtf_push(os, wc_gb2312_or_gbk(gbk), gbk);
+	    else
+		wtf_push(os, WC_CCS_GBK, gbk);
+	} else if (WC_GB18030_MAP[c] == L4) {
+	    gb[1] = c;
+	    st->state = WC_GB18030_MBYTE2;
+	    return NULL;
+	}
+	break;
+    case WC_GB18030_MBYTE2:
+	if (WC_GB18030_MAP[c] == UB) {
+	    gb[2] = c;
+	    st->state = WC_GB18030_MBYTE3;
+	    return NULL;
+	}
+	break;
+    case WC_GB18030_MBYTE3:
+	if (WC_GB18030_MAP[c] == L4) {
+	    cc.ccs = WC_CCS_GB18030_W;
+	    cc.code = ((wc_uint32)gb[0] << 24)
+		    | ((wc_uint32)gb[1] << 16)
+		    | ((wc_uint32)gb[2] << 8)
+		    | c;
+#ifdef USE_UNICODE
+	    if (WcOption.gb18030_as_ucs &&
+		(ucs = wc_gb18030_to_ucs(cc)) != WC_C_UCS4_ERROR)
+		wtf_push(os, WC_CCS_GB18030 | (wc_ucs_to_ccs(ucs) & ~WC_CCS_A_SET), cc.code);
+	    else
+#endif
+	        wtf_push(os, cc.ccs, cc.code);
+	}
+	break;
+    }
+    st->state = -1;
+    return os;
+}