summaryrefslogtreecommitdiffstats
path: root/intl/uconv/ucvja/nsUnicodeToISO2022JP.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'intl/uconv/ucvja/nsUnicodeToISO2022JP.cpp')
-rw-r--r--intl/uconv/ucvja/nsUnicodeToISO2022JP.cpp271
1 files changed, 271 insertions, 0 deletions
diff --git a/intl/uconv/ucvja/nsUnicodeToISO2022JP.cpp b/intl/uconv/ucvja/nsUnicodeToISO2022JP.cpp
new file mode 100644
index 000000000..9328afdee
--- /dev/null
+++ b/intl/uconv/ucvja/nsUnicodeToISO2022JP.cpp
@@ -0,0 +1,271 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsUnicodeToISO2022JP.h"
+#include "nsUCVJADll.h"
+#include "nsUnicodeEncodeHelper.h"
+
+//----------------------------------------------------------------------
+// Global functions and data [declaration]
+
+// Basic mapping from Hankaku to Zenkaku
+// Nigori and Maru are taken care of outside this basic mapping
+static const char16_t gBasicMapping[0x40] =
+{
+// 0xff60
+0xff60,0x3002,0x300c,0x300d,0x3001,0x30fb,0x30f2,0x30a1,
+// 0xff68
+0x30a3,0x30a5,0x30a7,0x30a9,0x30e3,0x30e5,0x30e7,0x30c3,
+// 0xff70
+0x30fc,0x30a2,0x30a4,0x30a6,0x30a8,0x30aa,0x30ab,0x30ad,
+// 0xff78
+0x30af,0x30b1,0x30b3,0x30b5,0x30b7,0x30b9,0x30bb,0x30bd,
+// 0xff80
+0x30bf,0x30c1,0x30c4,0x30c6,0x30c8,0x30ca,0x30cb,0x30cc,
+// 0xff88
+0x30cd,0x30ce,0x30cf,0x30d2,0x30d5,0x30d8,0x30db,0x30de,
+// 0xff90
+0x30df,0x30e0,0x30e1,0x30e2,0x30e4,0x30e6,0x30e8,0x30e9,
+// 0xff98
+0x30ea,0x30eb,0x30ec,0x30ed,0x30ef,0x30f3,0x309b,0x309c
+};
+
+// Do we need to check for Nigori for the next unicode ?
+#define NEED_TO_CHECK_NIGORI(u) (((0xff76<=(u))&&((u)<=0xff84))||((0xff8a<=(u))&&((u)<=0xff8e)))
+
+// Do we need to check for Maru for the next unicode ?
+#define NEED_TO_CHECK_MARU(u) ((0xff8a<=(u))&&((u)<=0xff8e))
+
+// The unicode is in Katakana Hankaku block
+#define IS_HANKAKU(u) ((0xff61 <= (u)) && ((u) <= 0xff9f))
+#define IS_NIGORI(u) (0xff9e == (u))
+#define IS_MARU(u) (0xff9f == (u))
+#define NIGORI_MODIFIER 1
+#define MARU_MODIFIER 2
+
+static const uint16_t g_ufAsciiMapping [] = {
+ 0x0001, 0x0004, 0x0005, 0x0008, 0x0000, 0x0000, 0x007F, 0x0000
+};
+
+#define SIZE_OF_ISO2022JP_TABLES 5
+static const uint16_t * g_ufMappingTables[SIZE_OF_ISO2022JP_TABLES] = {
+ g_ufAsciiMapping, // ASCII ISOREG 6
+ g_uf0201GLMapping, // JIS X 0201-1976 ISOREG 14
+ g_uf0208Mapping, // JIS X 0208-1983 ISOREG 87
+ g_uf0208extMapping, // JIS X 0208 - cp932 ext
+ g_uf0208Mapping, // JIS X 0208-1978 ISOREG 42
+};
+
+static const uScanClassID g_ufScanClassIDs[SIZE_OF_ISO2022JP_TABLES] = {
+ u1ByteCharset, // ASCII ISOREG 6
+ u1ByteCharset, // JIS X 0201-1976 ISOREG 14
+ u2BytesCharset, // JIS X 0208-1983 ISOREG 87
+ u2BytesCharset, // JIS X 0208- cp932 ext
+ u2BytesCharset, // JIS X 0208-1978 ISOREG 42
+};
+#define JIS_X_208_INDEX 2
+
+//----------------------------------------------------------------------
+// Class nsUnicodeToISO2022JP [implementation]
+
+// worst case max length:
+// 1 2 3 4 5 6 7 8
+// ESC $ B XX XX ESC ( B
+nsUnicodeToISO2022JP::nsUnicodeToISO2022JP()
+: nsEncoderSupport(8)
+{
+ Reset();
+}
+
+nsUnicodeToISO2022JP::~nsUnicodeToISO2022JP()
+{
+}
+
+nsresult nsUnicodeToISO2022JP::ChangeCharset(int32_t aCharset,
+ char * aDest,
+ int32_t * aDestLength)
+{
+ // both 2 and 3 generate the same escape sequence. 2 is for
+ // the standard JISx0208 table, and 3 is for theCP932 extensions
+ // therefore, we treat them as the same one.
+ if(((2 == aCharset) && ( 3 == mCharset)) ||
+ ((3 == aCharset) && ( 2 == mCharset)) )
+ {
+ mCharset = aCharset;
+ }
+
+ if(aCharset == mCharset)
+ {
+ *aDestLength = 0;
+ return NS_OK;
+ }
+
+ if (*aDestLength < 3) {
+ *aDestLength = 0;
+ return NS_OK_UENC_MOREOUTPUT;
+ }
+
+ switch (aCharset) {
+ case 0: // ASCII ISOREG 6
+ aDest[0] = 0x1b;
+ aDest[1] = '(';
+ aDest[2] = 'B';
+ break;
+ case 1: // JIS X 0201-1976 ("Roman" set) ISOREG 14
+ aDest[0] = 0x1b;
+ aDest[1] = '(';
+ aDest[2] = 'J';
+ break;
+ case 2: // JIS X 0208-1983 ISOREG 87
+ case 3: // JIS X 0208-1983
+ // we currently use this for CP932 ext
+ aDest[0] = 0x1b;
+ aDest[1] = '$';
+ aDest[2] = 'B';
+ break;
+ case 4: // JIS X 0201-1978 ISOREG 87-
+ // we currently do not have a diff mapping for it.
+ aDest[0] = 0x1b;
+ aDest[1] = '$';
+ aDest[2] = '@';
+ break;
+ }
+
+ mCharset = aCharset;
+ *aDestLength = 3;
+ return NS_OK;
+}
+
+nsresult nsUnicodeToISO2022JP::ConvertHankaku(const char16_t * aSrc,
+ int32_t * aSrcLength,
+ char * aDest,
+ int32_t * aDestLength)
+{
+ nsresult res = NS_OK;
+
+ const char16_t * src = aSrc;
+ const char16_t * srcEnd = aSrc + *aSrcLength;
+ char * dest = aDest;
+ char * destEnd = aDest + *aDestLength;
+ char16_t srcChar, tempChar;
+ int32_t bcr, bcw;
+
+ bcw = destEnd - dest;
+ res = ChangeCharset(JIS_X_208_INDEX, dest, &bcw);
+ dest += bcw;
+ if (res != NS_OK) {
+ return res;
+ }
+
+ while (src < srcEnd) {
+ srcChar = *src;
+ if (!IS_HANKAKU(srcChar)) {
+ break;
+ }
+ ++src;
+ tempChar = gBasicMapping[(srcChar) - 0xff60];
+
+ if (src < srcEnd) {
+ // if the character could take a modifier, and the next char
+ // is a modifier, modify it and eat one char16_t
+ if (NEED_TO_CHECK_NIGORI(srcChar) && IS_NIGORI(*src)) {
+ tempChar += NIGORI_MODIFIER;
+ ++src;
+ } else if (NEED_TO_CHECK_MARU(srcChar) && IS_MARU(*src)) {
+ tempChar += MARU_MODIFIER;
+ ++src;
+ }
+ }
+ bcr = 1;
+ bcw = destEnd - dest;
+ res = nsUnicodeEncodeHelper::ConvertByTable(
+ &tempChar, &bcr, dest, &bcw, g_ufScanClassIDs[JIS_X_208_INDEX],
+ nullptr, (uMappingTable *) g_ufMappingTables[JIS_X_208_INDEX]);
+ dest += bcw;
+ if (res != NS_OK)
+ break;
+ }
+ *aDestLength = dest - aDest;
+ *aSrcLength = src - aSrc;
+ return res;
+}
+
+//----------------------------------------------------------------------
+// Subclassing of nsTableEncoderSupport class [implementation]
+
+NS_IMETHODIMP nsUnicodeToISO2022JP::ConvertNoBuffNoErr(
+ const char16_t * aSrc,
+ int32_t * aSrcLength,
+ char * aDest,
+ int32_t * aDestLength)
+{
+ nsresult res = NS_OK;
+
+ const char16_t * src = aSrc;
+ const char16_t * srcEnd = aSrc + *aSrcLength;
+ char * dest = aDest;
+ char * destEnd = aDest + *aDestLength;
+ int32_t bcr, bcw;
+ int32_t i;
+
+ while (src < srcEnd) {
+ for (i=0; i< SIZE_OF_ISO2022JP_TABLES ; i++) {
+ bcr = 1;
+ bcw = destEnd - dest;
+ res = nsUnicodeEncodeHelper::ConvertByTable(src, &bcr, dest, &bcw,
+ g_ufScanClassIDs[i], nullptr,
+ (uMappingTable *) g_ufMappingTables[i]);
+ if (res != NS_ERROR_UENC_NOMAPPING) break;
+ }
+
+ if ( i>= SIZE_OF_ISO2022JP_TABLES) {
+ if (IS_HANKAKU(*src)) {
+ bcr = srcEnd - src;
+ bcw = destEnd - dest;
+ res = ConvertHankaku(src, &bcr, dest, &bcw);
+ dest += bcw;
+ src += bcr;
+ if (res == NS_OK) continue;
+ } else {
+ res = NS_ERROR_UENC_NOMAPPING;
+ src++;
+ }
+ }
+ if (res != NS_OK) break;
+
+ bcw = destEnd - dest;
+ res = ChangeCharset(i, dest, &bcw);
+ dest += bcw;
+ if (res != NS_OK) break;
+
+ bcr = srcEnd - src;
+ bcw = destEnd - dest;
+ res = nsUnicodeEncodeHelper::ConvertByTable(src, &bcr, dest, &bcw,
+ g_ufScanClassIDs[i], nullptr,
+ (uMappingTable *) g_ufMappingTables[i]);
+ src += bcr;
+ dest += bcw;
+
+ if ((res != NS_OK) && (res != NS_ERROR_UENC_NOMAPPING)) break;
+ if (res == NS_ERROR_UENC_NOMAPPING) src--;
+ }
+
+ *aSrcLength = src - aSrc;
+ *aDestLength = dest - aDest;
+ return res;
+}
+
+NS_IMETHODIMP nsUnicodeToISO2022JP::FinishNoBuff(char * aDest,
+ int32_t * aDestLength)
+{
+ ChangeCharset(0, aDest, aDestLength);
+ return NS_OK;
+}
+
+NS_IMETHODIMP nsUnicodeToISO2022JP::Reset()
+{
+ mCharset = 0;
+ return nsEncoderSupport::Reset();
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-25 13:15:23 +0000