2005-02-09 [colin] 1.0.1cvs1.2
[claws.git] / src / codeconv.c
index 53e6e827631e4add5fb700c636b66dc7f02743a4..e24a840c023df93e21955215486ee1dba9d8cf9a 100644 (file)
@@ -1,6 +1,6 @@
 /*
  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
- * Copyright (C) 1999-2003 Hiroyuki Yamamoto
+ * Copyright (C) 1999-2005 Hiroyuki Yamamoto
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -31,9 +31,7 @@
 #  include <locale.h>
 #endif
 
-#if HAVE_ICONV
-#  include <iconv.h>
-#endif
+#include <iconv.h>
 
 #include "intl.h"
 #include "codeconv.h"
@@ -51,7 +49,7 @@ typedef enum
        JIS_AUXKANJI
 } JISState;
 
-#define SUBST_CHAR     '_'
+#define SUBST_CHAR     0x5f;
 #define ESC            '\033'
 
 #define iseuckanji(c) \
@@ -104,7 +102,31 @@ typedef enum
                state = JIS_AUXKANJI;   \
        }
 
-void conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
+static void conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
+static void conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf);
+static void conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
+
+static void conv_jistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
+static void conv_sjistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
+static void conv_euctoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
+static void conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
+
+static void conv_utf8toeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
+static void conv_utf8tojis(gchar *outbuf, gint outlen, const gchar *inbuf);
+
+static void conv_unreadable_eucjp(gchar *str);
+static void conv_unreadable_8bit(gchar *str);
+static void conv_unreadable_latin(gchar *str);
+
+static void conv_jistodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
+static void conv_sjistodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
+static void conv_euctodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
+
+static void conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
+static void conv_ustodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
+static void conv_noconv(gchar *outbuf, gint outlen, const gchar *inbuf);
+
+static void conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
        const guchar *in = inbuf;
        guchar *out = outbuf;
@@ -173,14 +195,80 @@ void conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
        *out = '\0';
 }
 
-void conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf)
+#define JIS_HWDAKUTEN          0x5e
+#define JIS_HWHANDAKUTEN       0x5f
+
+static gint conv_jis_hantozen(guchar *outbuf, guchar jis_code, guchar sound_sym)
+{
+       static guint16 h2z_tbl[] = {
+               /* 0x20 - 0x2f */
+               0x0000, 0x2123, 0x2156, 0x2157, 0x2122, 0x2126, 0x2572, 0x2521,
+               0x2523, 0x2525, 0x2527, 0x2529, 0x2563, 0x2565, 0x2567, 0x2543,
+               /* 0x30 - 0x3f */
+               0x213c, 0x2522, 0x2524, 0x2526, 0x2528, 0x252a, 0x252b, 0x252d,
+               0x252f, 0x2531, 0x2533, 0x2535, 0x2537, 0x2539, 0x253b, 0x253d,
+               /* 0x40 - 0x4f */
+               0x253f, 0x2541, 0x2544, 0x2546, 0x2548, 0x254a, 0x254b, 0x254c,
+               0x254d, 0x254e, 0x254f, 0x2552, 0x2555, 0x2558, 0x255b, 0x255e,
+               /* 0x50 - 0x5f */
+               0x255f, 0x2560, 0x2561, 0x2562, 0x2564, 0x2566, 0x2568, 0x2569,
+               0x256a, 0x256b, 0x256c, 0x256d, 0x256f, 0x2573, 0x212b, 0x212c
+       };
+
+       static guint16 dakuten_tbl[] = {
+               /* 0x30 - 0x3f */
+               0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x252c, 0x252e,
+               0x2530, 0x2532, 0x2534, 0x2536, 0x2538, 0x253a, 0x253c, 0x253e,
+               /* 0x40 - 0x4f */
+               0x2540, 0x2542, 0x2545, 0x2547, 0x2549, 0x0000, 0x0000, 0x0000,
+               0x0000, 0x0000, 0x2550, 0x2553, 0x2556, 0x2559, 0x255c, 0x0000
+       };
+
+       static guint16 handakuten_tbl[] = {
+               /* 0x4a - 0x4e */
+               0x2551, 0x2554, 0x2557, 0x255a, 0x255d
+       };
+
+       guint16 out_code;
+
+       jis_code &= 0x7f;
+       sound_sym &= 0x7f;
+
+       if (jis_code < 0x21 || jis_code > 0x5f)
+               return 0;
+
+       if (sound_sym == JIS_HWDAKUTEN &&
+           jis_code >= 0x36 && jis_code <= 0x4e) {
+               out_code = dakuten_tbl[jis_code - 0x30];
+               if (out_code != 0) {
+                       *outbuf = out_code >> 8;
+                       *(outbuf + 1) = out_code & 0xff;
+                       return 2;
+               }
+       }
+
+       if (sound_sym == JIS_HWHANDAKUTEN &&
+           jis_code >= 0x4a && jis_code <= 0x4e) {
+               out_code = handakuten_tbl[jis_code - 0x4a];
+               *outbuf = out_code >> 8;
+               *(outbuf + 1) = out_code & 0xff;
+               return 2;
+       }
+
+       out_code = h2z_tbl[jis_code - 0x20];
+       *outbuf = out_code >> 8;
+       *(outbuf + 1) = out_code & 0xff;
+       return 1;
+}
+
+static void conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
        const guchar *in = inbuf;
        guchar *out = outbuf;
        JISState state = JIS_ASCII;
 
        while (*in != '\0') {
-               if (isascii(*in)) {
+               if (IS_ASCII(*in)) {
                        K_OUT();
                        *out++ = *in++;
                } else if (iseuckanji(*in)) {
@@ -192,19 +280,43 @@ void conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf)
                                K_OUT();
                                *out++ = SUBST_CHAR;
                                in++;
-                               if (*in != '\0' && !isascii(*in)) {
+                               if (*in != '\0' && !IS_ASCII(*in)) {
                                        *out++ = SUBST_CHAR;
                                        in++;
                                }
                        }
                } else if (iseuchwkana1(*in)) {
-                       in++;
-                       if (iseuchwkana2(*in)) {
-                               HW_IN();
-                               *out++ = *in++ & 0x7f;
+                       if (iseuchwkana2(*(in + 1))) {
+                               if (prefs_common.allow_jisx0201_kana) {
+                                       HW_IN();
+                                       in++;
+                                       *out++ = *in++ & 0x7f;
+                               } else {
+                                       guchar jis_ch[2];
+                                       gint len;
+
+                                       if (iseuchwkana1(*(in + 2)) &&
+                                           iseuchwkana2(*(in + 3)))
+                                               len = conv_jis_hantozen
+                                                       (jis_ch,
+                                                        *(in + 1), *(in + 3));
+                                       else
+                                               len = conv_jis_hantozen
+                                                       (jis_ch,
+                                                        *(in + 1), '\0');
+                                       if (len == 0)
+                                               in += 2;
+                                       else {
+                                               K_IN();
+                                               in += len * 2;
+                                               *out++ = jis_ch[0];
+                                               *out++ = jis_ch[1];
+                                       }
+                               }
                        } else {
                                K_OUT();
-                               if (*in != '\0' && !isascii(*in)) {
+                               in++;
+                               if (*in != '\0' && !IS_ASCII(*in)) {
                                        *out++ = SUBST_CHAR;
                                        in++;
                                }
@@ -217,10 +329,10 @@ void conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf)
                                *out++ = *in++ & 0x7f;
                        } else {
                                K_OUT();
-                               if (*in != '\0' && !isascii(*in)) {
+                               if (*in != '\0' && !IS_ASCII(*in)) {
                                        *out++ = SUBST_CHAR;
                                        in++;
-                                       if (*in != '\0' && !isascii(*in)) {
+                                       if (*in != '\0' && !IS_ASCII(*in)) {
                                                *out++ = SUBST_CHAR;
                                                in++;
                                        }
@@ -237,13 +349,13 @@ void conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf)
        *out = '\0';
 }
 
-void conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
+static void conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
        const guchar *in = inbuf;
        guchar *out = outbuf;
 
        while (*in != '\0') {
-               if (isascii(*in)) {
+               if (IS_ASCII(*in)) {
                        *out++ = *in++;
                } else if (issjiskanji1(*in)) {
                        if (issjiskanji2(*(in + 1))) {
@@ -266,7 +378,7 @@ void conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
                        } else {
                                *out++ = SUBST_CHAR;
                                in++;
-                               if (*in != '\0' && !isascii(*in)) {
+                               if (*in != '\0' && !IS_ASCII(*in)) {
                                        *out++ = SUBST_CHAR;
                                        in++;
                                }
@@ -283,40 +395,71 @@ void conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
        *out = '\0';
 }
 
-void conv_anytoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
+static void conv_jistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
-       switch (conv_guess_ja_encoding(inbuf)) {
-       case C_ISO_2022_JP:
-               conv_jistoeuc(outbuf, outlen, inbuf);
-               break;
-       case C_SHIFT_JIS:
-               conv_sjistoeuc(outbuf, outlen, inbuf);
-               break;
-       default:
+       gchar *eucstr;
+
+       Xalloca(eucstr, outlen, return);
+
+       conv_jistoeuc(eucstr, outlen, inbuf);
+       conv_euctoutf8(outbuf, outlen, eucstr);
+}
+
+static void conv_sjistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
+{
+       gchar *tmpstr;
+
+       tmpstr = conv_iconv_strdup(inbuf, CS_SHIFT_JIS, CS_UTF_8);
+       if (tmpstr) {
+               strncpy2(outbuf, tmpstr, outlen);
+               g_free(tmpstr);
+       } else
                strncpy2(outbuf, inbuf, outlen);
-               break;
-       }
 }
 
-void conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
+static void conv_euctoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
-       gchar *tmpstr = NULL;
+       static iconv_t cd = (iconv_t)-1;
+       static gboolean iconv_ok = TRUE;
+       gchar *tmpstr;
+
+       if (cd == (iconv_t)-1) {
+               if (!iconv_ok) {
+                       strncpy2(outbuf, inbuf, outlen);
+                       return;
+               }
+               cd = iconv_open(CS_UTF_8, CS_EUC_JP_MS);
+               if (cd == (iconv_t)-1) {
+                       cd = iconv_open(CS_UTF_8, CS_EUC_JP);
+                       if (cd == (iconv_t)-1) {
+                               g_warning("conv_euctoutf8(): %s\n",
+                                         g_strerror(errno));
+                               iconv_ok = FALSE;
+                               strncpy2(outbuf, inbuf, outlen);
+                               return;
+                       }
+               }
+       }
 
-       switch (conv_guess_ja_encoding(inbuf)) {
-       case C_ISO_2022_JP:
-               tmpstr = conv_codeset_strdup(inbuf, CS_ISO_2022_JP, CS_UTF_8);
+       tmpstr = conv_iconv_strdup_with_cd(inbuf, cd);
+       if (tmpstr) {
                strncpy2(outbuf, tmpstr, outlen);
                g_free(tmpstr);
+       } else
+               strncpy2(outbuf, inbuf, outlen);
+}
+
+static void conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
+{
+       switch (conv_guess_ja_encoding(inbuf)) {
+       case C_ISO_2022_JP:
+               conv_jistoutf8(outbuf, outlen, inbuf);
                break;
        case C_SHIFT_JIS:
-               tmpstr = conv_codeset_strdup(inbuf, CS_SHIFT_JIS, CS_UTF_8);
-               strncpy2(outbuf, tmpstr, outlen);
-               g_free(tmpstr);
+               conv_sjistoutf8(outbuf, outlen, inbuf);
                break;
        case C_EUC_JP:
-               tmpstr = conv_codeset_strdup(inbuf, CS_EUC_JP, CS_UTF_8);
-               strncpy2(outbuf, tmpstr, outlen);
-               g_free(tmpstr);
+               conv_euctoutf8(outbuf, outlen, inbuf);
                break;
        default:
                strncpy2(outbuf, inbuf, outlen);
@@ -324,16 +467,46 @@ void conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
        }
 }
 
-void conv_anytojis(gchar *outbuf, gint outlen, const gchar *inbuf)
+static void conv_utf8toeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
-       switch (conv_guess_ja_encoding(inbuf)) {
-       case C_EUC_JP:
-               conv_euctojis(outbuf, outlen, inbuf);
-               break;
-       default:
-               strncpy2(outbuf, inbuf, outlen);
-               break;
+       static iconv_t cd = (iconv_t)-1;
+       static gboolean iconv_ok = TRUE;
+       gchar *tmpstr;
+
+       if (cd == (iconv_t)-1) {
+               if (!iconv_ok) {
+                       strncpy2(outbuf, inbuf, outlen);
+                       return;
+               }
+               cd = iconv_open(CS_EUC_JP_MS, CS_UTF_8);
+               if (cd == (iconv_t)-1) {
+                       cd = iconv_open(CS_EUC_JP, CS_UTF_8);
+                       if (cd == (iconv_t)-1) {
+                               g_warning("conv_utf8toeuc(): %s\n",
+                                         g_strerror(errno));
+                               iconv_ok = FALSE;
+                               strncpy2(outbuf, inbuf, outlen);
+                               return;
+                       }
+               }
        }
+
+       tmpstr = conv_iconv_strdup_with_cd(inbuf, cd);
+       if (tmpstr) {
+               strncpy2(outbuf, tmpstr, outlen);
+               g_free(tmpstr);
+       } else
+               strncpy2(outbuf, inbuf, outlen);
+}
+
+static void conv_utf8tojis(gchar *outbuf, gint outlen, const gchar *inbuf)
+{
+       gchar *eucstr;
+
+       Xalloca(eucstr, outlen, return);
+
+       conv_utf8toeuc(eucstr, outlen, inbuf);
+       conv_euctojis(outbuf, outlen, eucstr);
 }
 
 static gchar valid_eucjp_tbl[][96] = {
@@ -418,12 +591,12 @@ static gboolean isprintableeuckanji(guchar c1, guchar c2)
        return TRUE;
 }
 
-void conv_unreadable_eucjp(gchar *str)
+static void conv_unreadable_eucjp(gchar *str)
 {
        register guchar *p = str;
 
        while (*p != '\0') {
-               if (isascii(*p)) {
+               if (IS_ASCII(*p)) {
                        /* convert CR+LF -> LF */
                        if (*p == '\r' && *(p + 1) == '\n')
                                memmove(p, p + 1, strlen(p));
@@ -437,7 +610,7 @@ void conv_unreadable_eucjp(gchar *str)
                                /* substitute unprintable code */
                                *p++ = SUBST_CHAR;
                                if (*p != '\0') {
-                                       if (isascii(*p))
+                                       if (IS_ASCII(*p))
                                                p++;
                                        else
                                                *p++ = SUBST_CHAR;
@@ -461,7 +634,7 @@ void conv_unreadable_eucjp(gchar *str)
        }
 }
 
-void conv_unreadable_8bit(gchar *str)
+static void conv_unreadable_8bit(gchar *str)
 {
        register guchar *p = str;
 
@@ -469,12 +642,12 @@ void conv_unreadable_8bit(gchar *str)
                /* convert CR+LF -> LF */
                if (*p == '\r' && *(p + 1) == '\n')
                        memmove(p, p + 1, strlen(p));
-               else if (!isascii(*p)) *p = SUBST_CHAR;
+               else if (!IS_ASCII(*p)) *p = SUBST_CHAR;
                p++;
        }
 }
 
-void conv_unreadable_latin(gchar *str)
+static void conv_unreadable_latin(gchar *str)
 {
        register guchar *p = str;
 
@@ -482,40 +655,12 @@ void conv_unreadable_latin(gchar *str)
                /* convert CR+LF -> LF */
                if (*p == '\r' && *(p + 1) == '\n')
                        memmove(p, p + 1, strlen(p));
-               else if ((*p & 0xff) >= 0x7f && (*p & 0xff) <= 0x9f)
+               else if ((*p & 0xff) >= 0x7f)
                        *p = SUBST_CHAR;
                p++;
        }
 }
 
-void conv_unreadable_locale(gchar *str)
-{
-       switch (conv_get_current_charset()) {
-       case C_US_ASCII:
-       case C_ISO_8859_1:
-       case C_ISO_8859_2:
-       case C_ISO_8859_3:
-       case C_ISO_8859_4:
-       case C_ISO_8859_5:
-       case C_ISO_8859_6:
-       case C_ISO_8859_7:
-       case C_ISO_8859_8:
-       case C_ISO_8859_9:
-       case C_ISO_8859_10:
-       case C_ISO_8859_11:
-       case C_ISO_8859_13:
-       case C_ISO_8859_14:
-       case C_ISO_8859_15:
-               conv_unreadable_latin(str);
-               break;
-       case C_EUC_JP:
-               conv_unreadable_eucjp(str);
-               break;
-       default:
-               break;
-       }
-}
-
 #define NCV    '\0'
 
 void conv_mb_alnum(gchar *str)
@@ -592,7 +737,7 @@ CharSet conv_guess_ja_encoding(const gchar *str)
                        if (guessed == C_US_ASCII)
                                return C_ISO_2022_JP;
                        p += 2;
-               } else if (isascii(*p)) {
+               } else if (IS_ASCII(*p)) {
                        p++;
                } else if (iseuckanji(*p) && iseuckanji(*(p + 1))) {
                        if (*p >= 0xfd && *p <= 0xfe)
@@ -624,70 +769,63 @@ CharSet conv_guess_ja_encoding(const gchar *str)
        return guessed;
 }
 
-void conv_jistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
+static void conv_jistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
-       conv_jistoeuc(outbuf, outlen, inbuf);
-       conv_unreadable_eucjp(outbuf);
+       conv_jistoutf8(outbuf, outlen, inbuf);
 }
 
-void conv_sjistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
+static void conv_sjistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
-       conv_sjistoeuc(outbuf, outlen, inbuf);
-       conv_unreadable_eucjp(outbuf);
+       conv_sjistoutf8(outbuf, outlen, inbuf);
 }
 
-void conv_euctodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
+static void conv_euctodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
-       strncpy2(outbuf, inbuf, outlen);
-       conv_unreadable_eucjp(outbuf);
+       conv_euctoutf8(outbuf, outlen, inbuf);
 }
 
-#warning FIXME_GTK2
-#if 0
-void conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
+void conv_utf8todisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
-       conv_anytoeuc(outbuf, outlen, inbuf);
-       conv_unreadable_eucjp(outbuf);
+       strncpy2(outbuf, inbuf, outlen);
 }
-#else
-void conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
+
+static void conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
        conv_anytoutf8(outbuf, outlen, inbuf);
 }
-#endif
 
-void conv_ustodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
+static void conv_ustodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
        strncpy2(outbuf, inbuf, outlen);
        conv_unreadable_8bit(outbuf);
 }
 
-void conv_latintodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
-{
-       strncpy2(outbuf, inbuf, outlen);
-       conv_unreadable_latin(outbuf);
-}
-
 void conv_localetodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
-       strncpy2(outbuf, inbuf, outlen);
-       conv_unreadable_locale(outbuf);
+       gchar *tmpstr;
+
+       tmpstr = conv_iconv_strdup(inbuf, conv_get_locale_charset_str(),
+                                  CS_INTERNAL);
+       if (tmpstr) {
+               strncpy2(outbuf, tmpstr, outlen);
+               g_free(tmpstr);
+       } else
+               strncpy2(outbuf, inbuf, outlen);
 }
 
-void conv_noconv(gchar *outbuf, gint outlen, const gchar *inbuf)
+static void conv_noconv(gchar *outbuf, gint outlen, const gchar *inbuf)
 {
        strncpy2(outbuf, inbuf, outlen);
 }
 
-CodeConverter *conv_code_converter_new(const gchar *charset)
+CodeConverter *conv_code_converter_new(const gchar *src_charset)
 {
        CodeConverter *conv;
 
        conv = g_new0(CodeConverter, 1);
-#warning FIXME_GTK2
-       conv->code_conv_func = conv_get_code_conv_func(charset, CS_UTF_8);
-       conv->charset_str = g_strdup(charset);
-       conv->charset = conv_get_charset_from_str(charset);
+       conv->code_conv_func = conv_get_code_conv_func(src_charset, NULL);
+       conv->charset_str = g_strdup(src_charset);
+       conv->charset = conv_get_charset_from_str(src_charset);
 
        return conv;
 }
@@ -701,14 +839,12 @@ void conv_code_converter_destroy(CodeConverter *conv)
 gint conv_convert(CodeConverter *conv, gchar *outbuf, gint outlen,
                  const gchar *inbuf)
 {
-#if HAVE_ICONV
        if (conv->code_conv_func != conv_noconv)
                conv->code_conv_func(outbuf, outlen, inbuf);
        else {
                gchar *str;
 
-#warning FIXME_GTK2
-               str = conv_iconv_strdup(inbuf, conv->charset_str, CS_UTF_8);
+               str = conv_iconv_strdup(inbuf, conv->charset_str, NULL);
                if (!str)
                        return -1;
                else {
@@ -716,9 +852,6 @@ gint conv_convert(CodeConverter *conv, gchar *outbuf, gint outlen,
                        g_free(str);
                }
        }
-#else /* !HAVE_ICONV */
-       conv->code_conv_func(outbuf, outlen, inbuf);
-#endif
 
        return 0;
 }
@@ -740,11 +873,7 @@ gchar *conv_codeset_strdup(const gchar *inbuf,
                return g_realloc(buf, strlen(buf) + 1);
        }
 
-#if HAVE_ICONV
        return conv_iconv_strdup(inbuf, src_code, dest_code);
-#else
-       return g_strdup(inbuf);
-#endif /* HAVE_ICONV */
 }
 
 CodeConvFunc conv_get_code_conv_func(const gchar *src_charset_str,
@@ -755,7 +884,7 @@ CodeConvFunc conv_get_code_conv_func(const gchar *src_charset_str,
        CharSet dest_charset;
 
        if (!src_charset_str)
-               src_charset = conv_get_current_charset();
+               src_charset = conv_get_locale_charset();
        else
                src_charset = conv_get_charset_from_str(src_charset_str);
 
@@ -771,24 +900,9 @@ CodeConvFunc conv_get_code_conv_func(const gchar *src_charset_str,
 
        if (dest_charset == C_US_ASCII)
                return conv_ustodisp;
-       else if (dest_charset == C_UTF_8 ||
-                (dest_charset == C_AUTO &&
-                 conv_get_current_charset() == C_UTF_8))
-               return conv_noconv;
 
        switch (src_charset) {
-       case C_ISO_2022_JP:
-       case C_ISO_2022_JP_2:
-               if (dest_charset == C_AUTO &&
-                   conv_get_current_charset() == C_EUC_JP)
-                       code_conv = conv_jistodisp;
-               else if (dest_charset == C_EUC_JP)
-                       code_conv = conv_jistoeuc;
-               break;
        case C_US_ASCII:
-               if (dest_charset == C_AUTO)
-                       code_conv = conv_ustodisp;
-               break;
        case C_ISO_8859_1:
        case C_ISO_8859_2:
        case C_ISO_8859_3:
@@ -803,23 +917,42 @@ CodeConvFunc conv_get_code_conv_func(const gchar *src_charset_str,
        case C_ISO_8859_13:
        case C_ISO_8859_14:
        case C_ISO_8859_15:
+               break;
+       case C_ISO_2022_JP:
+       case C_ISO_2022_JP_2:
+       case C_ISO_2022_JP_3:
                if (dest_charset == C_AUTO)
-                       code_conv = conv_latintodisp;
+                       code_conv = conv_jistodisp;
+               else if (dest_charset == C_EUC_JP)
+                       code_conv = conv_jistoeuc;
+               else if (dest_charset == C_UTF_8)
+                       code_conv = conv_jistoutf8;
                break;
        case C_SHIFT_JIS:
-               if (dest_charset == C_AUTO &&
-                   conv_get_current_charset() == C_EUC_JP)
+               if (dest_charset == C_AUTO)
                        code_conv = conv_sjistodisp;
                else if (dest_charset == C_EUC_JP)
                        code_conv = conv_sjistoeuc;
+               else if (dest_charset == C_UTF_8)
+                       code_conv = conv_sjistoutf8;
                break;
        case C_EUC_JP:
-               if (dest_charset == C_AUTO &&
-                   conv_get_current_charset() == C_EUC_JP)
+               if (dest_charset == C_AUTO)
                        code_conv = conv_euctodisp;
-               else if (dest_charset == C_ISO_2022_JP ||
-                        dest_charset == C_ISO_2022_JP_2)
+               else if (dest_charset == C_ISO_2022_JP   ||
+                        dest_charset == C_ISO_2022_JP_2 ||
+                        dest_charset == C_ISO_2022_JP_3)
                        code_conv = conv_euctojis;
+               else if (dest_charset == C_UTF_8)
+                       code_conv = conv_euctoutf8;
+               break;
+       case C_UTF_8:
+               if (dest_charset == C_EUC_JP)
+                       code_conv = conv_utf8toeuc;
+               else if (dest_charset == C_ISO_2022_JP   ||
+                        dest_charset == C_ISO_2022_JP_2 ||
+                        dest_charset == C_ISO_2022_JP_3)
+                       code_conv = conv_utf8tojis;
                break;
        default:
                break;
@@ -828,38 +961,48 @@ CodeConvFunc conv_get_code_conv_func(const gchar *src_charset_str,
        return code_conv;
 }
 
-#if HAVE_ICONV
 gchar *conv_iconv_strdup(const gchar *inbuf,
                         const gchar *src_code, const gchar *dest_code)
 {
        iconv_t cd;
-       const gchar *inbuf_p;
        gchar *outbuf;
-       gchar *outbuf_p;
-       gint in_size;
-       gint in_left;
-       gint out_size;
-       gint out_left;
-       gint n_conv;
-       gint len;
 
        if (!src_code)
                src_code = conv_get_outgoing_charset_str();
        if (!dest_code)
-               dest_code = conv_get_current_charset_str();
-
-       /* don't convert if current codeset is US-ASCII */
-       if (!strcasecmp(dest_code, CS_US_ASCII))
-               return g_strdup(inbuf);
+               dest_code = CS_INTERNAL;
 
        /* don't convert if src and dest codeset are identical */
        if (!strcasecmp(src_code, dest_code))
                return g_strdup(inbuf);
 
+       /* don't convert if current codeset is US-ASCII */
+       if (!strcasecmp(dest_code, CS_US_ASCII))
+               return g_strdup(inbuf);
+
        cd = iconv_open(dest_code, src_code);
        if (cd == (iconv_t)-1)
                return NULL;
 
+       outbuf = conv_iconv_strdup_with_cd(inbuf, cd);
+
+       iconv_close(cd);
+
+       return outbuf;
+}
+
+gchar *conv_iconv_strdup_with_cd(const gchar *inbuf, iconv_t cd)
+{
+       const gchar *inbuf_p;
+       gchar *outbuf;
+       gchar *outbuf_p;
+       size_t in_size;
+       size_t in_left;
+       size_t out_size;
+       size_t out_left;
+       size_t n_conv;
+       size_t len;
+
        inbuf_p = inbuf;
        in_size = strlen(inbuf);
        in_left = in_size;
@@ -878,8 +1021,9 @@ gchar *conv_iconv_strdup(const gchar *inbuf,
 }
 
        while ((n_conv = iconv(cd, (ICONV_CONST gchar **)&inbuf_p, &in_left,
-                              &outbuf_p, &out_left)) < 0) {
+                              &outbuf_p, &out_left)) == (size_t)-1) {
                if (EILSEQ == errno) {
+                       //g_print("iconv(): at %d: %s\n", in_size - in_left, g_strerror(errno));
                        inbuf_p++;
                        in_left--;
                        if (out_left == 0) {
@@ -898,7 +1042,8 @@ gchar *conv_iconv_strdup(const gchar *inbuf,
                }
        }
 
-       while ((n_conv = iconv(cd, NULL, NULL, &outbuf_p, &out_left)) < 0) {
+       while ((n_conv = iconv(cd, NULL, NULL, &outbuf_p, &out_left)) ==
+              (size_t)-1) {
                if (E2BIG == errno) {
                        EXPAND_BUF();
                } else {
@@ -914,11 +1059,8 @@ gchar *conv_iconv_strdup(const gchar *inbuf,
        outbuf = g_realloc(outbuf, len + 1);
        outbuf[len] = '\0';
 
-       iconv_close(cd);
-
        return outbuf;
 }
-#endif /* HAVE_ICONV */
 
 static const struct {
        CharSet charset;
@@ -966,8 +1108,10 @@ static const struct {
        {C_KOI8_U,              CS_KOI8_U},
        {C_ISO_2022_JP,         CS_ISO_2022_JP},
        {C_ISO_2022_JP_2,       CS_ISO_2022_JP_2},
+       {C_ISO_2022_JP_3,       CS_ISO_2022_JP_3},
        {C_EUC_JP,              CS_EUC_JP},
        {C_EUC_JP,              CS_EUCJP},
+       {C_EUC_JP_MS,           CS_EUC_JP_MS},
        {C_SHIFT_JIS,           CS_SHIFT_JIS},
        {C_SHIFT_JIS,           CS_SHIFT__JIS},
        {C_SHIFT_JIS,           CS_SJIS},
@@ -1015,6 +1159,7 @@ static const struct {
        {"ru_RU"        , C_ISO_8859_5  , C_KOI8_R},
        {"tg_TJ"        , C_KOI8_T      , C_KOI8_T},
        {"ru_UA"        , C_KOI8_U      , C_KOI8_U},
+       {"uk_UA.CP1251" , C_WINDOWS_1251, C_KOI8_U},
        {"uk_UA"        , C_KOI8_U      , C_KOI8_U},
 
        {"be_BY"        , C_WINDOWS_1251, C_WINDOWS_1251},
@@ -1223,7 +1368,7 @@ CharSet conv_get_charset_from_str(const gchar *charset)
        return GPOINTER_TO_UINT(g_hash_table_lookup(table, charset));
 }
 
-CharSet conv_get_current_charset(void)
+CharSet conv_get_locale_charset(void)
 {
        static CharSet cur_charset = -1;
        const gchar *cur_locale;
@@ -1254,14 +1399,14 @@ CharSet conv_get_current_charset(void)
 
                /* "ja_JP.EUC" matches with "ja_JP.eucJP", "ja_JP.EUC" and
                   "ja_JP". "ja_JP" matches with "ja_JP.xxxx" and "ja" */
-               if (!strncasecmp(cur_locale, locale_table[i].locale,
+               if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
                                 strlen(locale_table[i].locale))) {
                        cur_charset = locale_table[i].charset;
                        return cur_charset;
                } else if ((p = strchr(locale_table[i].locale, '_')) &&
                         !strchr(p + 1, '.')) {
                        if (strlen(cur_locale) == 2 &&
-                           !strncasecmp(cur_locale, locale_table[i].locale, 2)) {
+                           !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
                                cur_charset = locale_table[i].charset;
                                return cur_charset;
                        }
@@ -1272,14 +1417,24 @@ CharSet conv_get_current_charset(void)
        return cur_charset;
 }
 
-const gchar *conv_get_current_charset_str(void)
+const gchar *conv_get_locale_charset_str(void)
 {
        static const gchar *codeset = NULL;
 
        if (!codeset)
-               codeset = conv_get_charset_str(conv_get_current_charset());
+               codeset = conv_get_charset_str(conv_get_locale_charset());
 
-       return codeset ? codeset : CS_US_ASCII;
+       return codeset ? codeset : CS_INTERNAL;
+}
+
+CharSet conv_get_internal_charset(void)
+{
+       return C_INTERNAL;
+}
+
+const gchar *conv_get_internal_charset_str(void)
+{
+       return CS_INTERNAL;
 }
 
 CharSet conv_get_outgoing_charset(void)
@@ -1306,29 +1461,20 @@ CharSet conv_get_outgoing_charset(void)
        for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
                const gchar *p;
 
-               if (!strncasecmp(cur_locale, locale_table[i].locale,
+               if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
                                 strlen(locale_table[i].locale))) {
                        out_charset = locale_table[i].out_charset;
                        break;
                } else if ((p = strchr(locale_table[i].locale, '_')) &&
                         !strchr(p + 1, '.')) {
                        if (strlen(cur_locale) == 2 &&
-                           !strncasecmp(cur_locale, locale_table[i].locale, 2)) {
+                           !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
                                out_charset = locale_table[i].out_charset;
                                break;
                        }
                }
        }
 
-#if !HAVE_ICONV
-       /* encoding conversion without iconv() is only supported
-          on Japanese locale for now */
-       if (out_charset == C_ISO_2022_JP)
-               return out_charset;
-       else
-               return conv_get_current_charset();
-#endif
-
        return out_charset;
 }
 
@@ -1338,7 +1484,7 @@ const gchar *conv_get_outgoing_charset_str(void)
        const gchar *str;
 
        if (prefs_common.outgoing_charset) {
-               if (!isalpha(prefs_common.outgoing_charset[0])) {
+               if (!isalpha((guchar)prefs_common.outgoing_charset[0])) {
                        g_free(prefs_common.outgoing_charset);
                        prefs_common.outgoing_charset = g_strdup(CS_AUTO);
                } else if (strcmp(prefs_common.outgoing_charset, CS_AUTO) != 0)
@@ -1348,18 +1494,20 @@ const gchar *conv_get_outgoing_charset_str(void)
        out_charset = conv_get_outgoing_charset();
        str = conv_get_charset_str(out_charset);
 
-       return str ? str : CS_US_ASCII;
+       return str ? str : CS_UTF_8;
 }
 
 gboolean conv_is_multibyte_encoding(CharSet encoding)
 {
        switch (encoding) {
        case C_EUC_JP:
+       case C_EUC_JP_MS:
        case C_EUC_KR:
        case C_EUC_TW:
        case C_EUC_CN:
        case C_ISO_2022_JP:
        case C_ISO_2022_JP_2:
+       case C_ISO_2022_JP_3:
        case C_ISO_2022_KR:
        case C_ISO_2022_CN:
        case C_SHIFT_JIS:
@@ -1393,15 +1541,10 @@ void conv_unmime_header_overwrite(gchar *str)
        gchar *buf;
        gint buflen;
        CharSet cur_charset;
-       const gchar *locale;
 
-       cur_charset = conv_get_current_charset();
+       cur_charset = conv_get_locale_charset();
 
-#warning FIXME_GTK2
-/* Should we always ensure to convert? */
-       locale = conv_get_current_locale();
-
-       if (locale && !strncasecmp(locale, "ja", 2)) {
+       if (cur_charset == C_EUC_JP) {
                buflen = strlen(str) * 2 + 1;
                Xalloca(buf, buflen, return);
                conv_anytodisp(buf, buflen, str);
@@ -1418,15 +1561,10 @@ void conv_unmime_header(gchar *outbuf, gint outlen, const gchar *str,
                        const gchar *charset)
 {
        CharSet cur_charset;
-       const gchar *locale;
-
-       cur_charset = conv_get_current_charset();
 
-#warning FIXME_GTK2
-/* Should we always ensure to convert? */
-       locale = conv_get_current_locale();
+       cur_charset = conv_get_locale_charset();
 
-       if (locale && !strncasecmp(locale, "ja", 2)) {
+       if (cur_charset == C_EUC_JP) {
                gchar *buf;
                gint buflen;
 
@@ -1434,8 +1572,25 @@ void conv_unmime_header(gchar *outbuf, gint outlen, const gchar *str,
                Xalloca(buf, buflen, return);
                conv_anytodisp(buf, buflen, str);
                unmime_header(outbuf, buf);
-       } else
+       } else {
+               gchar *tmp = NULL;
                unmime_header(outbuf, str);
+
+               if (outbuf && !g_utf8_validate(outbuf, -1, NULL)) {
+                       if (conv_get_locale_charset() != C_INTERNAL)
+                               tmp = conv_codeset_strdup(outbuf,
+                                       conv_get_locale_charset_str(),
+                                       CS_INTERNAL);
+
+                       if (tmp) {
+                               strncpy(outbuf, tmp, outlen-1);
+                               g_free(tmp);
+                       } else {
+                               conv_unreadable_8bit(outbuf);
+                       }
+               }
+       }
+
 }
 
 #define MAX_LINELEN            76
@@ -1443,17 +1598,15 @@ void conv_unmime_header(gchar *outbuf, gint outlen, const gchar *str,
 #define MIMESEP_BEGIN          "=?"
 #define MIMESEP_END            "?="
 
-#define B64LEN(len)    ((len) / 3 * 4 + ((len) % 3 ? 4 : 0))
-
 #define LBREAK_IF_REQUIRED(cond, is_plain_text)                                \
 {                                                                      \
-       if (len - (destp - dest) < MAX_LINELEN + 2) {                   \
+       if (len - (destp - (guchar *)dest) < MAX_LINELEN + 2) {         \
                *destp = '\0';                                          \
                return;                                                 \
        }                                                               \
                                                                        \
        if ((cond) && *srcp) {                                          \
-               if (destp > dest && left < MAX_LINELEN - 1) {           \
+               if (destp > (guchar *)dest && left < MAX_LINELEN - 1) { \
                        if (isspace(*(destp - 1)))                      \
                                destp--;                                \
                        else if (is_plain_text && isspace(*srcp))       \
@@ -1475,10 +1628,12 @@ void conv_encode_header(gchar *dest, gint len, const gchar *src,
        gint mimestr_len;
        gchar *mimesep_enc;
        gint left;
-       const gchar *srcp = src;
-       gchar *destp = dest;
+       const guchar *srcp = src;
+       guchar *destp = dest;
        gboolean use_base64;
 
+       g_return_if_fail(g_utf8_validate(src, -1, NULL) == TRUE);
+
        if (MB_CUR_MAX > 1) {
                use_base64 = TRUE;
                mimesep_enc = "?B?";
@@ -1487,9 +1642,7 @@ void conv_encode_header(gchar *dest, gint len, const gchar *src,
                mimesep_enc = "?Q?";
        }
 
-       cur_encoding = conv_get_current_charset_str();
-       if (!strcmp(cur_encoding, CS_US_ASCII))
-               cur_encoding = CS_ISO_8859_1;
+       cur_encoding = CS_INTERNAL;
        out_encoding = conv_get_outgoing_charset_str();
        if (!strcmp(out_encoding, CS_US_ASCII))
                out_encoding = CS_ISO_8859_1;
@@ -1537,7 +1690,7 @@ void conv_encode_header(gchar *dest, gint len, const gchar *src,
                        gchar *part_str;
                        gchar *out_str;
                        gchar *enc_str;
-                       const gchar *p = srcp;
+                       const guchar *p = srcp;
                        gint out_str_len;
                        gint out_enc_str_len;
                        gint mime_block_len;
@@ -1551,14 +1704,7 @@ void conv_encode_header(gchar *dest, gint len, const gchar *src,
                                if (addr_field && (*p == '(' || *p == ')'))
                                        break;
 
-                               if (MB_CUR_MAX > 1) {
-                                       mb_len = mblen(p, MB_CUR_MAX);
-                                       if (mb_len < 0) {
-                                               g_warning("conv_encode_header(): invalid multibyte character encountered\n");
-                                               mb_len = 1;
-                                       }
-                               } else
-                                       mb_len = 1;
+                               mb_len = g_utf8_skip[*p];
 
                                Xstrndup_a(part_str, srcp, cur_len + mb_len, );
                                out_str = conv_codeset_strdup