| |
| /* |
| * ISO-2022-JP-2 |
| */ |
| |
| /* Specification: RFC 1554 */ |
| /* ESC '(' 'I' for JISX0201 Katakana is an extension not found in RFC 1554 or |
| CJK.INF, but implemented in glibc-2.1 and qt-2.0. */ |
| |
| #define ESC 0x1b |
| |
| /* |
| * The state is composed of one of the following values |
| */ |
| #define STATE_ASCII 0 |
| #define STATE_JISX0201ROMAN 1 |
| #define STATE_JISX0201KATAKANA 2 |
| #define STATE_JISX0208 3 |
| #define STATE_JISX0212 4 |
| #define STATE_GB2312 5 |
| #define STATE_KSC5601 6 |
| /* |
| * and one of the following values, << 8 |
| */ |
| #define STATE_G2_NONE 0 |
| #define STATE_G2_ISO8859_1 1 |
| #define STATE_G2_ISO8859_7 2 |
| |
| #define SPLIT_STATE \ |
| unsigned int state1 = state & 0xff, state2 = state >> 8 |
| #define COMBINE_STATE \ |
| state = (state2 << 8) | state1 |
| |
| static int |
| iso2022_jp2_mbtowc (conv_t conv, wchar_t *pwc, const unsigned char *s, int n) |
| { |
| state_t state = conv->istate; |
| SPLIT_STATE; |
| int count = 0; |
| unsigned char c; |
| for (;;) { |
| c = *s; |
| if (c == ESC) { |
| if (n < count+3) |
| goto none; |
| if (s[1] == '(') { |
| if (s[2] == 'B') { |
| state1 = STATE_ASCII; |
| s += 3; count += 3; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| if (s[2] == 'J') { |
| state1 = STATE_JISX0201ROMAN; |
| s += 3; count += 3; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| if (s[2] == 'I') { |
| state1 = STATE_JISX0201KATAKANA; |
| s += 3; count += 3; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| return RET_ILSEQ; |
| } |
| if (s[1] == '$') { |
| if (s[2] == '@' || s[2] == 'B') { |
| /* We don't distinguish JIS X 0208-1978 and JIS X 0208-1983. */ |
| state1 = STATE_JISX0208; |
| s += 3; count += 3; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| if (s[2] == 'A') { |
| state1 = STATE_GB2312; |
| s += 3; count += 3; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| if (s[2] == '(') { |
| if (n < count+4) |
| goto none; |
| if (s[3] == 'D') { |
| state1 = STATE_JISX0212; |
| s += 4; count += 4; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| if (s[3] == 'C') { |
| state1 = STATE_KSC5601; |
| s += 4; count += 4; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| return RET_ILSEQ; |
| } |
| return RET_ILSEQ; |
| } |
| if (s[1] == '.') { |
| if (n < count+3) |
| goto none; |
| if (s[2] == 'A') { |
| state2 = STATE_G2_ISO8859_1; |
| s += 3; count += 3; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| if (s[2] == 'F') { |
| state2 = STATE_G2_ISO8859_7; |
| s += 3; count += 3; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| return RET_ILSEQ; |
| } |
| if (s[1] == 'N') { |
| switch (state2) { |
| case STATE_G2_NONE: |
| return RET_ILSEQ; |
| case STATE_G2_ISO8859_1: |
| if (s[2] < 0x80) { |
| unsigned char buf = s[2]+0x80; |
| int ret = iso8859_1_mbtowc(conv,pwc,&buf,1); |
| if (ret == RET_ILSEQ) |
| return RET_ILSEQ; |
| if (ret != 1) abort(); |
| COMBINE_STATE; |
| conv->istate = state; |
| return count+3; |
| } else |
| return RET_ILSEQ; |
| case STATE_G2_ISO8859_7: |
| if (s[2] < 0x80) { |
| unsigned char buf = s[2]+0x80; |
| int ret = iso8859_7_mbtowc(conv,pwc,&buf,1); |
| if (ret == RET_ILSEQ) |
| return RET_ILSEQ; |
| if (ret != 1) abort(); |
| COMBINE_STATE; |
| conv->istate = state; |
| return count+3; |
| } else |
| return RET_ILSEQ; |
| default: abort(); |
| } |
| } |
| return RET_ILSEQ; |
| } |
| break; |
| } |
| switch (state1) { |
| case STATE_ASCII: |
| if (c < 0x80) { |
| int ret = ascii_mbtowc(conv,pwc,s,1); |
| if (ret == RET_ILSEQ) |
| return RET_ILSEQ; |
| if (ret != 1) abort(); |
| if (*pwc == 0x000a || *pwc == 0x000d) |
| state2 = STATE_G2_NONE; |
| COMBINE_STATE; |
| conv->istate = state; |
| return count+1; |
| } else |
| return RET_ILSEQ; |
| case STATE_JISX0201ROMAN: |
| if (c < 0x80) { |
| int ret = jisx0201_mbtowc(conv,pwc,s,1); |
| if (ret == RET_ILSEQ) |
| return RET_ILSEQ; |
| if (ret != 1) abort(); |
| if (*pwc == 0x000a || *pwc == 0x000d) |
| state2 = STATE_G2_NONE; |
| COMBINE_STATE; |
| conv->istate = state; |
| return count+1; |
| } else |
| return RET_ILSEQ; |
| case STATE_JISX0201KATAKANA: |
| if (c < 0x80) { |
| unsigned char buf = c+0x80; |
| int ret = jisx0201_mbtowc(conv,pwc,&buf,1); |
| if (ret == RET_ILSEQ) |
| return RET_ILSEQ; |
| if (ret != 1) abort(); |
| COMBINE_STATE; |
| conv->istate = state; |
| return count+1; |
| } else |
| return RET_ILSEQ; |
| case STATE_JISX0208: |
| if (n < count+2) |
| goto none; |
| if (s[0] < 0x80 && s[1] < 0x80) { |
| int ret = jisx0208_mbtowc(conv,pwc,s,2); |
| if (ret == RET_ILSEQ) |
| return RET_ILSEQ; |
| if (ret != 2) abort(); |
| COMBINE_STATE; |
| conv->istate = state; |
| return count+2; |
| } else |
| return RET_ILSEQ; |
| case STATE_JISX0212: |
| if (n < count+2) |
| goto none; |
| if (s[0] < 0x80 && s[1] < 0x80) { |
| int ret = jisx0212_mbtowc(conv,pwc,s,2); |
| if (ret == RET_ILSEQ) |
| return RET_ILSEQ; |
| if (ret != 2) abort(); |
| COMBINE_STATE; |
| conv->istate = state; |
| return count+2; |
| } else |
| return RET_ILSEQ; |
| case STATE_GB2312: |
| if (n < count+2) |
| goto none; |
| if (s[0] < 0x80 && s[1] < 0x80) { |
| int ret = gb2312_mbtowc(conv,pwc,s,2); |
| if (ret == RET_ILSEQ) |
| return RET_ILSEQ; |
| if (ret != 2) abort(); |
| COMBINE_STATE; |
| conv->istate = state; |
| return count+2; |
| } else |
| return RET_ILSEQ; |
| case STATE_KSC5601: |
| if (n < count+2) |
| goto none; |
| if (s[0] < 0x80 && s[1] < 0x80) { |
| int ret = ksc5601_mbtowc(conv,pwc,s,2); |
| if (ret == RET_ILSEQ) |
| return RET_ILSEQ; |
| if (ret != 2) abort(); |
| COMBINE_STATE; |
| conv->istate = state; |
| return count+2; |
| } else |
| return RET_ILSEQ; |
| default: abort(); |
| } |
| |
| none: |
| COMBINE_STATE; |
| conv->istate = state; |
| return RET_TOOFEW(count); |
| } |
| |
| static int |
| iso2022_jp2_wctomb (conv_t conv, unsigned char *r, wchar_t wc, int n) |
| { |
| state_t state = conv->ostate; |
| SPLIT_STATE; |
| unsigned char buf[2]; |
| int ret; |
| |
| /* Try ASCII. */ |
| ret = ascii_wctomb(conv,buf,wc,1); |
| if (ret != RET_ILSEQ) { |
| if (ret != 1) abort(); |
| if (buf[0] < 0x80) { |
| int count = (state1 == STATE_ASCII ? 1 : 4); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state1 != STATE_ASCII) { |
| r[0] = ESC; |
| r[1] = '('; |
| r[2] = 'B'; |
| r += 3; |
| state1 = STATE_ASCII; |
| } |
| r[0] = buf[0]; |
| if (wc == 0x000a || wc == 0x000d) |
| state2 = STATE_G2_NONE; |
| COMBINE_STATE; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| /* Try ISO-8859-1. */ |
| ret = iso8859_1_wctomb(conv,buf,wc,1); |
| if (ret != RET_ILSEQ) { |
| if (ret != 1) abort(); |
| if (buf[0] >= 0x80) { |
| int count = (state2 == STATE_G2_ISO8859_1 ? 3 : 6); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state2 != STATE_G2_ISO8859_1) { |
| r[0] = ESC; |
| r[1] = '.'; |
| r[2] = 'A'; |
| r += 3; |
| state2 = STATE_G2_ISO8859_1; |
| } |
| r[0] = ESC; |
| r[1] = 'N'; |
| r[2] = buf[0]-0x80; |
| COMBINE_STATE; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| /* Try ISO-8859-7. */ |
| ret = iso8859_7_wctomb(conv,buf,wc,1); |
| if (ret != RET_ILSEQ) { |
| if (ret != 1) abort(); |
| if (buf[0] >= 0x80) { |
| int count = (state2 == STATE_G2_ISO8859_7 ? 3 : 6); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state2 != STATE_G2_ISO8859_7) { |
| r[0] = ESC; |
| r[1] = '.'; |
| r[2] = 'F'; |
| r += 3; |
| state2 = STATE_G2_ISO8859_7; |
| } |
| r[0] = ESC; |
| r[1] = 'N'; |
| r[2] = buf[0]-0x80; |
| COMBINE_STATE; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| /* Try JIS X 0201-1976 Roman and Kana. */ |
| ret = jisx0201_wctomb(conv,buf,wc,1); |
| if (ret != RET_ILSEQ) { |
| if (ret != 1) abort(); |
| if (buf[0] < 0x80) { |
| int count = (state1 == STATE_JISX0201ROMAN ? 1 : 4); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state1 != STATE_JISX0201ROMAN) { |
| r[0] = ESC; |
| r[1] = '('; |
| r[2] = 'J'; |
| r += 3; |
| state1 = STATE_JISX0201ROMAN; |
| } |
| r[0] = buf[0]; |
| if (wc == 0x000a || wc == 0x000d) |
| state2 = STATE_G2_NONE; |
| COMBINE_STATE; |
| conv->ostate = state; |
| return count; |
| } else { |
| int count = (state1 == STATE_JISX0201KATAKANA ? 1 : 4); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state1 != STATE_JISX0201KATAKANA) { |
| r[0] = ESC; |
| r[1] = '('; |
| r[2] = 'I'; |
| r += 3; |
| state1 = STATE_JISX0201KATAKANA; |
| } |
| r[0] = buf[0]-0x80; |
| COMBINE_STATE; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| /* Try JIS X 0208-1990 in place of JIS X 0208-1978 and JIS X 0208-1983. */ |
| ret = jisx0208_wctomb(conv,buf,wc,2); |
| if (ret != RET_ILSEQ) { |
| if (ret != 2) abort(); |
| if (buf[0] < 0x80 && buf[1] < 0x80) { |
| int count = (state1 == STATE_JISX0208 ? 2 : 5); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state1 != STATE_JISX0208) { |
| r[0] = ESC; |
| r[1] = '$'; |
| r[2] = 'B'; |
| r += 3; |
| state1 = STATE_JISX0208; |
| } |
| r[0] = buf[0]; |
| r[1] = buf[1]; |
| COMBINE_STATE; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| /* Try JIS X 0212-1990. */ |
| ret = jisx0212_wctomb(conv,buf,wc,2); |
| if (ret != RET_ILSEQ) { |
| if (ret != 2) abort(); |
| if (buf[0] < 0x80 && buf[1] < 0x80) { |
| int count = (state1 == STATE_JISX0212 ? 2 : 6); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state1 != STATE_JISX0212) { |
| r[0] = ESC; |
| r[1] = '$'; |
| r[2] = '('; |
| r[3] = 'D'; |
| r += 4; |
| state1 = STATE_JISX0212; |
| } |
| r[0] = buf[0]; |
| r[1] = buf[1]; |
| COMBINE_STATE; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| /* Try GB 2312-1980. */ |
| ret = gb2312_wctomb(conv,buf,wc,2); |
| if (ret != RET_ILSEQ) { |
| if (ret != 2) abort(); |
| if (buf[0] < 0x80 && buf[1] < 0x80) { |
| int count = (state1 == STATE_GB2312 ? 2 : 5); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state1 != STATE_GB2312) { |
| r[0] = ESC; |
| r[1] = '$'; |
| r[2] = 'A'; |
| r += 3; |
| state1 = STATE_GB2312; |
| } |
| r[0] = buf[0]; |
| r[1] = buf[1]; |
| COMBINE_STATE; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| /* Try KS C 5601-1992. */ |
| ret = ksc5601_wctomb(conv,buf,wc,2); |
| if (ret != RET_ILSEQ) { |
| if (ret != 2) abort(); |
| if (buf[0] < 0x80 && buf[1] < 0x80) { |
| int count = (state1 == STATE_KSC5601 ? 2 : 6); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state1 != STATE_KSC5601) { |
| r[0] = ESC; |
| r[1] = '$'; |
| r[2] = '('; |
| r[3] = 'C'; |
| r += 4; |
| state1 = STATE_KSC5601; |
| } |
| r[0] = buf[0]; |
| r[1] = buf[1]; |
| COMBINE_STATE; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| return RET_ILSEQ; |
| } |
| |
| static int |
| iso2022_jp2_reset (conv_t conv, unsigned char *r, int n) |
| { |
| state_t state = conv->ostate; |
| SPLIT_STATE; |
| (void)state2; |
| if (state1 != STATE_ASCII) { |
| if (n < 3) |
| return RET_TOOSMALL; |
| r[0] = ESC; |
| r[1] = '('; |
| r[2] = 'B'; |
| /* conv->ostate = 0; will be done by the caller */ |
| return 3; |
| } else |
| return 0; |
| } |
| |
| #undef COMBINE_STATE |
| #undef SPLIT_STATE |
| #undef STATE_G2_ISO8859_7 |
| #undef STATE_G2_ISO8859_1 |
| #undef STATE_G2_NONE |
| #undef STATE_KSC5601 |
| #undef STATE_GB2312 |
| #undef STATE_JISX0212 |
| #undef STATE_JISX0208 |
| #undef STATE_JISX0201KATAKANA |
| #undef STATE_JISX0201ROMAN |
| #undef STATE_ASCII |
