| /* | |
| * Copyright (C) 1999-2001, 2008, 2016 Free Software Foundation, Inc. | |
| * This file is part of the GNU LIBICONV Library. | |
| * | |
| * The GNU LIBICONV Library is free software; you can redistribute it | |
| * and/or modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either version 2.1 | |
| * of the License, or (at your option) any later version. | |
| * | |
| * The GNU LIBICONV Library is distributed in the hope that it will be | |
| * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with the GNU LIBICONV Library; see the file COPYING.LIB. | |
| * If not, see <https://www.gnu.org/licenses/>. | |
| */ | |
| /* | |
| * ISO-2022-CN-EXT | |
| */ | |
| /* Specification: RFC 1922 */ | |
| #define ESC 0x1b | |
| #define SO 0x0e | |
| #define SI 0x0f | |
| /* | |
| * The state is composed of one of the following values | |
| */ | |
| #define STATE_ASCII 0 | |
| #define STATE_TWOBYTE 1 | |
| /* | |
| * and one of the following values, << 8 | |
| */ | |
| #define STATE2_NONE 0 | |
| #define STATE2_DESIGNATED_GB2312 1 | |
| #define STATE2_DESIGNATED_CNS11643_1 2 | |
| #define STATE2_DESIGNATED_ISO_IR_165 3 | |
| /* | |
| * and one of the following values, << 16 | |
| */ | |
| #define STATE3_NONE 0 | |
| #define STATE3_DESIGNATED_CNS11643_2 1 | |
| /* | |
| * and one of the following values, << 24 | |
| */ | |
| #define STATE4_NONE 0 | |
| #define STATE4_DESIGNATED_CNS11643_3 1 | |
| #define STATE4_DESIGNATED_CNS11643_4 2 | |
| #define STATE4_DESIGNATED_CNS11643_5 3 | |
| #define STATE4_DESIGNATED_CNS11643_6 4 | |
| #define STATE4_DESIGNATED_CNS11643_7 5 | |
| #define SPLIT_STATE \ | |
| unsigned int state1 = state & 0xff, state2 = (state >> 8) & 0xff, state3 = (state >> 16) & 0xff, state4 = state >> 24 | |
| #define COMBINE_STATE \ | |
| state = (state4 << 24) | (state3 << 16) | (state2 << 8) | state1 | |
| static int | |
| iso2022_cn_ext_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n) | |
| { | |
| state_t state = conv->istate; | |
| SPLIT_STATE; | |
| int count = 0; | |
| unsigned char c; | |
| for (;;) { | |
| c = *s; | |
| if (c == ESC) { | |
| if (n < count+4) | |
| goto none; | |
| if (s[1] == '$') { | |
| if (s[2] == ')') { | |
| if (s[3] == 'A') { | |
| state2 = STATE2_DESIGNATED_GB2312; | |
| s += 4; count += 4; | |
| if (n < count+1) | |
| goto none; | |
| continue; | |
| } | |
| if (s[3] == 'G') { | |
| state2 = STATE2_DESIGNATED_CNS11643_1; | |
| s += 4; count += 4; | |
| if (n < count+1) | |
| goto none; | |
| continue; | |
| } | |
| if (s[3] == 'E') { | |
| state2 = STATE2_DESIGNATED_ISO_IR_165; | |
| s += 4; count += 4; | |
| if (n < count+1) | |
| goto none; | |
| continue; | |
| } | |
| } | |
| if (s[2] == '*') { | |
| if (s[3] == 'H') { | |
| state3 = STATE3_DESIGNATED_CNS11643_2; | |
| s += 4; count += 4; | |
| if (n < count+1) | |
| goto none; | |
| continue; | |
| } | |
| } | |
| if (s[2] == '+') { | |
| if (s[3] == 'I') { | |
| state4 = STATE4_DESIGNATED_CNS11643_3; | |
| s += 4; count += 4; | |
| if (n < count+1) | |
| goto none; | |
| continue; | |
| } | |
| if (s[3] == 'J') { | |
| state4 = STATE4_DESIGNATED_CNS11643_4; | |
| s += 4; count += 4; | |
| if (n < count+1) | |
| goto none; | |
| continue; | |
| } | |
| if (s[3] == 'K') { | |
| state4 = STATE4_DESIGNATED_CNS11643_5; | |
| s += 4; count += 4; | |
| if (n < count+1) | |
| goto none; | |
| continue; | |
| } | |
| if (s[3] == 'L') { | |
| state4 = STATE4_DESIGNATED_CNS11643_6; | |
| s += 4; count += 4; | |
| if (n < count+1) | |
| goto none; | |
| continue; | |
| } | |
| if (s[3] == 'M') { | |
| state4 = STATE4_DESIGNATED_CNS11643_7; | |
| s += 4; count += 4; | |
| if (n < count+1) | |
| goto none; | |
| continue; | |
| } | |
| } | |
| } | |
| if (s[1] == 'N') { | |
| switch (state3) { | |
| case STATE3_NONE: | |
| goto ilseq; | |
| case STATE3_DESIGNATED_CNS11643_2: | |
| if (s[2] < 0x80 && s[3] < 0x80) { | |
| int ret = cns11643_2_mbtowc(conv,pwc,s+2,2); | |
| if (ret == RET_ILSEQ) | |
| goto ilseq; | |
| if (ret != 2) abort(); | |
| COMBINE_STATE; | |
| conv->istate = state; | |
| return count+4; | |
| } else | |
| goto ilseq; | |
| default: abort(); | |
| } | |
| } | |
| if (s[1] == 'O') { | |
| switch (state4) { | |
| case STATE4_NONE: | |
| goto ilseq; | |
| case STATE4_DESIGNATED_CNS11643_3: | |
| if (s[2] < 0x80 && s[3] < 0x80) { | |
| int ret = cns11643_3_mbtowc(conv,pwc,s+2,2); | |
| if (ret == RET_ILSEQ) | |
| goto ilseq; | |
| if (ret != 2) abort(); | |
| COMBINE_STATE; | |
| conv->istate = state; | |
| return count+4; | |
| } else | |
| goto ilseq; | |
| case STATE4_DESIGNATED_CNS11643_4: | |
| if (s[2] < 0x80 && s[3] < 0x80) { | |
| int ret = cns11643_4_mbtowc(conv,pwc,s+2,2); | |
| if (ret == RET_ILSEQ) | |
| goto ilseq; | |
| if (ret != 2) abort(); | |
| COMBINE_STATE; | |
| conv->istate = state; | |
| return count+4; | |
| } else | |
| goto ilseq; | |
| case STATE4_DESIGNATED_CNS11643_5: | |
| if (s[2] < 0x80 && s[3] < 0x80) { | |
| int ret = cns11643_5_mbtowc(conv,pwc,s+2,2); | |
| if (ret == RET_ILSEQ) | |
| goto ilseq; | |
| if (ret != 2) abort(); | |
| COMBINE_STATE; | |
| conv->istate = state; | |
| return count+4; | |
| } else | |
| goto ilseq; | |
| case STATE4_DESIGNATED_CNS11643_6: | |
| if (s[2] < 0x80 && s[3] < 0x80) { | |
| int ret = cns11643_6_mbtowc(conv,pwc,s+2,2); | |
| if (ret == RET_ILSEQ) | |
| goto ilseq; | |
| if (ret != 2) abort(); | |
| COMBINE_STATE; | |
| conv->istate = state; | |
| return count+4; | |
| } else | |
| goto ilseq; | |
| case STATE4_DESIGNATED_CNS11643_7: | |
| if (s[2] < 0x80 && s[3] < 0x80) { | |
| int ret = cns11643_7_mbtowc(conv,pwc,s+2,2); | |
| if (ret == RET_ILSEQ) | |
| goto ilseq; | |
| if (ret != 2) abort(); | |
| COMBINE_STATE; | |
| conv->istate = state; | |
| return count+4; | |
| } else | |
| goto ilseq; | |
| default: abort(); | |
| } | |
| } | |
| goto ilseq; | |
| } | |
| if (c == SO) { | |
| if (state2 != STATE2_DESIGNATED_GB2312 && state2 != STATE2_DESIGNATED_CNS11643_1 && state2 != STATE2_DESIGNATED_ISO_IR_165) | |
| goto ilseq; | |
| state1 = STATE_TWOBYTE; | |
| s++; count++; | |
| if (n < count+1) | |
| goto none; | |
| continue; | |
| } | |
| if (c == SI) { | |
| state1 = STATE_ASCII; | |
| s++; count++; | |
| if (n < count+1) | |
| goto none; | |
| continue; | |
| } | |
| break; | |
| } | |
| switch (state1) { | |
| case STATE_ASCII: | |
| if (c < 0x80) { | |
| int ret = ascii_mbtowc(conv,pwc,s,1); | |
| if (ret == RET_ILSEQ) | |
| goto ilseq; | |
| if (ret != 1) abort(); | |
| if (*pwc == 0x000a || *pwc == 0x000d) { | |
| state2 = STATE2_NONE; state3 = STATE3_NONE; state4 = STATE3_NONE; | |
| } | |
| COMBINE_STATE; | |
| conv->istate = state; | |
| return count+1; | |
| } else | |
| goto ilseq; | |
| case STATE_TWOBYTE: | |
| if (n < count+2) | |
| goto none; | |
| if (s[0] < 0x80 && s[1] < 0x80) { | |
| int ret; | |
| switch (state2) { | |
| case STATE2_NONE: | |
| goto ilseq; | |
| case STATE2_DESIGNATED_GB2312: | |
| ret = gb2312_mbtowc(conv,pwc,s,2); break; | |
| case STATE2_DESIGNATED_CNS11643_1: | |
| ret = cns11643_1_mbtowc(conv,pwc,s,2); break; | |
| case STATE2_DESIGNATED_ISO_IR_165: | |
| ret = isoir165_mbtowc(conv,pwc,s,2); break; | |
| default: abort(); | |
| } | |
| if (ret == RET_ILSEQ) | |
| goto ilseq; | |
| if (ret != 2) abort(); | |
| COMBINE_STATE; | |
| conv->istate = state; | |
| return count+2; | |
| } else | |
| goto ilseq; | |
| default: abort(); | |
| } | |
| none: | |
| COMBINE_STATE; | |
| conv->istate = state; | |
| return RET_TOOFEW(count); | |
| ilseq: | |
| COMBINE_STATE; | |
| conv->istate = state; | |
| return RET_SHIFT_ILSEQ(count); | |
| } | |
| static int | |
| iso2022_cn_ext_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n) | |
| { | |
| state_t state = conv->ostate; | |
| SPLIT_STATE; | |
| unsigned char buf[3]; | |
| int ret; | |
| /* There is no need to handle Unicode 3.1 tag characters and to look for | |
| "zh-CN" or "zh-TW" tags, because GB2312 and CNS11643 are disjoint. */ | |
| /* Try ASCII. */ | |
| ret = ascii_wctomb(conv,buf,wc,1); | |
| if (ret != RET_ILUNI) { | |
| if (ret != 1) abort(); | |
| if (buf[0] < 0x80) { | |
| int count = (state1 == STATE_ASCII ? 1 : 2); | |
| if (n < count) | |
| return RET_TOOSMALL; | |
| if (state1 != STATE_ASCII) { | |
| r[0] = SI; | |
| r += 1; | |
| state1 = STATE_ASCII; | |
| } | |
| r[0] = buf[0]; | |
| if (wc == 0x000a || wc == 0x000d) { | |
| state2 = STATE2_NONE; state3 = STATE3_NONE; state4 = STATE3_NONE; | |
| } | |
| COMBINE_STATE; | |
| conv->ostate = state; | |
| return count; | |
| } | |
| } | |
| /* Try GB 2312-1980. */ | |
| ret = gb2312_wctomb(conv,buf,wc,2); | |
| if (ret != RET_ILUNI) { | |
| if (ret != 2) abort(); | |
| if (buf[0] < 0x80 && buf[1] < 0x80) { | |
| int count = (state2 == STATE2_DESIGNATED_GB2312 ? 0 : 4) + (state1 == STATE_TWOBYTE ? 0 : 1) + 2; | |
| if (n < count) | |
| return RET_TOOSMALL; | |
| if (state2 != STATE2_DESIGNATED_GB2312) { | |
| r[0] = ESC; | |
| r[1] = '$'; | |
| r[2] = ')'; | |
| r[3] = 'A'; | |
| r += 4; | |
| state2 = STATE2_DESIGNATED_GB2312; | |
| } | |
| if (state1 != STATE_TWOBYTE) { | |
| r[0] = SO; | |
| r += 1; | |
| state1 = STATE_TWOBYTE; | |
| } | |
| r[0] = buf[0]; | |
| r[1] = buf[1]; | |
| COMBINE_STATE; | |
| conv->ostate = state; | |
| return count; | |
| } | |
| } | |
| ret = cns11643_wctomb(conv,buf,wc,3); | |
| if (ret != RET_ILUNI) { | |
| if (ret != 3) abort(); | |
| /* Try CNS 11643-1992 Plane 1. */ | |
| if (buf[0] == 1 && buf[1] < 0x80 && buf[2] < 0x80) { | |
| int count = (state2 == STATE2_DESIGNATED_CNS11643_1 ? 0 : 4) + (state1 == STATE_TWOBYTE ? 0 : 1) + 2; | |
| if (n < count) | |
| return RET_TOOSMALL; | |
| if (state2 != STATE2_DESIGNATED_CNS11643_1) { | |
| r[0] = ESC; | |
| r[1] = '$'; | |
| r[2] = ')'; | |
| r[3] = 'G'; | |
| r += 4; | |
| state2 = STATE2_DESIGNATED_CNS11643_1; | |
| } | |
| if (state1 != STATE_TWOBYTE) { | |
| r[0] = SO; | |
| r += 1; | |
| state1 = STATE_TWOBYTE; | |
| } | |
| r[0] = buf[1]; | |
| r[1] = buf[2]; | |
| COMBINE_STATE; | |
| conv->ostate = state; | |
| return count; | |
| } | |
| /* Try CNS 11643-1992 Plane 2. */ | |
| if (buf[0] == 2 && buf[1] < 0x80 && buf[2] < 0x80) { | |
| int count = (state3 == STATE3_DESIGNATED_CNS11643_2 ? 0 : 4) + 4; | |
| if (n < count) | |
| return RET_TOOSMALL; | |
| if (state3 != STATE3_DESIGNATED_CNS11643_2) { | |
| r[0] = ESC; | |
| r[1] = '$'; | |
| r[2] = '*'; | |
| r[3] = 'H'; | |
| r += 4; | |
| state3 = STATE3_DESIGNATED_CNS11643_2; | |
| } | |
| r[0] = ESC; | |
| r[1] = 'N'; | |
| r[2] = buf[1]; | |
| r[3] = buf[2]; | |
| COMBINE_STATE; | |
| conv->ostate = state; | |
| return count; | |
| } | |
| /* Try CNS 11643-1992 Plane 3. */ | |
| if (buf[0] == 3 && buf[1] < 0x80 && buf[2] < 0x80) { | |
| int count = (state4 == STATE4_DESIGNATED_CNS11643_3 ? 0 : 4) + 4; | |
| if (n < count) | |
| return RET_TOOSMALL; | |
| if (state4 != STATE4_DESIGNATED_CNS11643_3) { | |
| r[0] = ESC; | |
| r[1] = '$'; | |
| r[2] = '+'; | |
| r[3] = 'I'; | |
| r += 4; | |
| state4 = STATE4_DESIGNATED_CNS11643_3; | |
| } | |
| r[0] = ESC; | |
| r[1] = 'O'; | |
| r[2] = buf[1]; | |
| r[3] = buf[2]; | |
| COMBINE_STATE; | |
| conv->ostate = state; | |
| return count; | |
| } | |
| /* Try CNS 11643-1992 Plane 4. */ | |
| if (buf[0] == 4 && buf[1] < 0x80 && buf[2] < 0x80) { | |
| int count = (state4 == STATE4_DESIGNATED_CNS11643_4 ? 0 : 4) + 4; | |
| if (n < count) | |
| return RET_TOOSMALL; | |
| if (state4 != STATE4_DESIGNATED_CNS11643_4) { | |
| r[0] = ESC; | |
| r[1] = '$'; | |
| r[2] = '+'; | |
| r[3] = 'J'; | |
| r += 4; | |
| state4 = STATE4_DESIGNATED_CNS11643_4; | |
| } | |
| r[0] = ESC; | |
| r[1] = 'O'; | |
| r[2] = buf[1]; | |
| r[3] = buf[2]; | |
| COMBINE_STATE; | |
| conv->ostate = state; | |
| return count; | |
| } | |
| /* Try CNS 11643-1992 Plane 5. */ | |
| if (buf[0] == 5 && buf[1] < 0x80 && buf[2] < 0x80) { | |
| int count = (state4 == STATE4_DESIGNATED_CNS11643_5 ? 0 : 4) + 4; | |
| if (n < count) | |
| return RET_TOOSMALL; | |
| if (state4 != STATE4_DESIGNATED_CNS11643_5) { | |
| r[0] = ESC; | |
| r[1] = '$'; | |
| r[2] = '+'; | |
| r[3] = 'K'; | |
| r += 4; | |
| state4 = STATE4_DESIGNATED_CNS11643_5; | |
| } | |
| r[0] = ESC; | |
| r[1] = 'O'; | |
| r[2] = buf[1]; | |
| r[3] = buf[2]; | |
| COMBINE_STATE; | |
| conv->ostate = state; | |
| return count; | |
| } | |
| /* Try CNS 11643-1992 Plane 6. */ | |
| if (buf[0] == 6 && buf[1] < 0x80 && buf[2] < 0x80) { | |
| int count = (state4 == STATE4_DESIGNATED_CNS11643_6 ? 0 : 4) + 4; | |
| if (n < count) | |
| return RET_TOOSMALL; | |
| if (state4 != STATE4_DESIGNATED_CNS11643_6) { | |
| r[0] = ESC; | |
| r[1] = '$'; | |
| r[2] = '+'; | |
| r[3] = 'L'; | |
| r += 4; | |
| state4 = STATE4_DESIGNATED_CNS11643_6; | |
| } | |
| r[0] = ESC; | |
| r[1] = 'O'; | |
| r[2] = buf[1]; | |
| r[3] = buf[2]; | |
| COMBINE_STATE; | |
| conv->ostate = state; | |
| return count; | |
| } | |
| /* Try CNS 11643-1992 Plane 7. */ | |
| if (buf[0] == 7 && buf[1] < 0x80 && buf[2] < 0x80) { | |
| int count = (state4 == STATE4_DESIGNATED_CNS11643_7 ? 0 : 4) + 4; | |
| if (n < count) | |
| return RET_TOOSMALL; | |
| if (state4 != STATE4_DESIGNATED_CNS11643_7) { | |
| r[0] = ESC; | |
| r[1] = '$'; | |
| r[2] = '+'; | |
| r[3] = 'M'; | |
| r += 4; | |
| state4 = STATE4_DESIGNATED_CNS11643_7; | |
| } | |
| r[0] = ESC; | |
| r[1] = 'O'; | |
| r[2] = buf[1]; | |
| r[3] = buf[2]; | |
| COMBINE_STATE; | |
| conv->ostate = state; | |
| return count; | |
| } | |
| } | |
| /* Try ISO-IR-165. */ | |
| ret = isoir165_wctomb(conv,buf,wc,2); | |
| if (ret != RET_ILUNI) { | |
| if (ret != 2) abort(); | |
| if (buf[0] < 0x80 && buf[1] < 0x80) { | |
| int count = (state2 == STATE2_DESIGNATED_ISO_IR_165 ? 0 : 4) + (state1 == STATE_TWOBYTE ? 0 : 1) + 2; | |
| if (n < count) | |
| return RET_TOOSMALL; | |
| if (state2 != STATE2_DESIGNATED_ISO_IR_165) { | |
| r[0] = ESC; | |
| r[1] = '$'; | |
| r[2] = ')'; | |
| r[3] = 'E'; | |
| r += 4; | |
| state2 = STATE2_DESIGNATED_ISO_IR_165; | |
| } | |
| if (state1 != STATE_TWOBYTE) { | |
| r[0] = SO; | |
| r += 1; | |
| state1 = STATE_TWOBYTE; | |
| } | |
| r[0] = buf[0]; | |
| r[1] = buf[1]; | |
| COMBINE_STATE; | |
| conv->ostate = state; | |
| return count; | |
| } | |
| } | |
| return RET_ILUNI; | |
| } | |
| static int | |
| iso2022_cn_ext_reset (conv_t conv, unsigned char *r, size_t n) | |
| { | |
| state_t state = conv->ostate; | |
| SPLIT_STATE; | |
| (void)state2; | |
| (void)state3; | |
| (void)state4; | |
| if (state1 != STATE_ASCII) { | |
| if (n < 1) | |
| return RET_TOOSMALL; | |
| r[0] = SI; | |
| /* conv->ostate = 0; will be done by the caller */ | |
| return 1; | |
| } else | |
| return 0; | |
| } | |
| #undef COMBINE_STATE | |
| #undef SPLIT_STATE | |
| #undef STATE4_DESIGNATED_CNS11643_7 | |
| #undef STATE4_DESIGNATED_CNS11643_6 | |
| #undef STATE4_DESIGNATED_CNS11643_5 | |
| #undef STATE4_DESIGNATED_CNS11643_4 | |
| #undef STATE4_DESIGNATED_CNS11643_3 | |
| #undef STATE4_NONE | |
| #undef STATE3_DESIGNATED_CNS11643_2 | |
| #undef STATE3_NONE | |
| #undef STATE2_DESIGNATED_ISO_IR_165 | |
| #undef STATE2_DESIGNATED_CNS11643_1 | |
| #undef STATE2_DESIGNATED_GB2312 | |
| #undef STATE2_NONE | |
| #undef STATE_TWOBYTE | |
| #undef STATE_ASCII |