Annotation of embedaddon/libiconv/lib/shift_jisx0213.h, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 1999-2002 Free Software Foundation, Inc.
! 3: * This file is part of the GNU LIBICONV Library.
! 4: *
! 5: * The GNU LIBICONV Library is free software; you can redistribute it
! 6: * and/or modify it under the terms of the GNU Library General Public
! 7: * License as published by the Free Software Foundation; either version 2
! 8: * of the License, or (at your option) any later version.
! 9: *
! 10: * The GNU LIBICONV Library is distributed in the hope that it will be
! 11: * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
! 12: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
! 13: * Library General Public License for more details.
! 14: *
! 15: * You should have received a copy of the GNU Library General Public
! 16: * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
! 17: * If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
! 18: * Fifth Floor, Boston, MA 02110-1301, USA.
! 19: */
! 20:
! 21: /*
! 22: * SHIFT_JISX0213
! 23: */
! 24:
! 25: /* The structure of Shift_JISX0213 is as follows:
! 26:
! 27: 0x00..0x7F: ISO646-JP, an ASCII variant
! 28:
! 29: 0x{A1..DF}: JISX0201 Katakana.
! 30:
! 31: 0x{81..9F,E0..EF}{40..7E,80..FC}: JISX0213 plane 1.
! 32:
! 33: 0x{F0..FC}{40..7E,80..FC}: JISX0213 plane 2, with irregular row mapping.
! 34:
! 35: Note that some JISX0213 characters are not contained in Unicode 3.2
! 36: and are therefore best represented as sequences of Unicode characters.
! 37: */
! 38:
! 39: #include "jisx0213.h"
! 40: #include "flushwc.h"
! 41:
! 42: static int
! 43: shift_jisx0213_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
! 44: {
! 45: ucs4_t last_wc = conv->istate;
! 46: if (last_wc) {
! 47: /* Output the buffered character. */
! 48: conv->istate = 0;
! 49: *pwc = last_wc;
! 50: return 0; /* Don't advance the input pointer. */
! 51: } else {
! 52: unsigned char c = *s;
! 53: if (c < 0x80) {
! 54: /* Plain ISO646-JP character. */
! 55: if (c == 0x5c)
! 56: *pwc = (ucs4_t) 0x00a5;
! 57: else if (c == 0x7e)
! 58: *pwc = (ucs4_t) 0x203e;
! 59: else
! 60: *pwc = (ucs4_t) c;
! 61: return 1;
! 62: } else if (c >= 0xa1 && c <= 0xdf) {
! 63: *pwc = c + 0xfec0;
! 64: return 1;
! 65: } else {
! 66: if ((c >= 0x81 && c <= 0x9f) || (c >= 0xe0 && c <= 0xfc)) {
! 67: /* Two byte character. */
! 68: if (n >= 2) {
! 69: unsigned char c2 = s[1];
! 70: if ((c2 >= 0x40 && c2 <= 0x7e) || (c2 >= 0x80 && c2 <= 0xfc)) {
! 71: unsigned int c1;
! 72: ucs4_t wc;
! 73: /* Convert to row and column. */
! 74: if (c < 0xe0)
! 75: c -= 0x81;
! 76: else
! 77: c -= 0xc1;
! 78: if (c2 < 0x80)
! 79: c2 -= 0x40;
! 80: else
! 81: c2 -= 0x41;
! 82: /* Now 0 <= c <= 0x3b, 0 <= c2 <= 0xbb. */
! 83: c1 = 2 * c;
! 84: if (c2 >= 0x5e)
! 85: c2 -= 0x5e, c1++;
! 86: c2 += 0x21;
! 87: if (c1 >= 0x5e) {
! 88: /* Handling of JISX 0213 plane 2 rows. */
! 89: if (c1 >= 0x67)
! 90: c1 += 230;
! 91: else if (c1 >= 0x63 || c1 == 0x5f)
! 92: c1 += 168;
! 93: else
! 94: c1 += 162;
! 95: }
! 96: wc = jisx0213_to_ucs4(0x121+c1,c2);
! 97: if (wc) {
! 98: if (wc < 0x80) {
! 99: /* It's a combining character. */
! 100: ucs4_t wc1 = jisx0213_to_ucs_combining[wc - 1][0];
! 101: ucs4_t wc2 = jisx0213_to_ucs_combining[wc - 1][1];
! 102: /* We cannot output two Unicode characters at once. So,
! 103: output the first character and buffer the second one. */
! 104: *pwc = wc1;
! 105: conv->istate = wc2;
! 106: } else
! 107: *pwc = wc;
! 108: return 2;
! 109: }
! 110: }
! 111: } else
! 112: return RET_TOOFEW(0);
! 113: }
! 114: return RET_ILSEQ;
! 115: }
! 116: }
! 117: }
! 118:
! 119: #define shift_jisx0213_flushwc normal_flushwc
! 120:
! 121: /* Composition tables for each of the relevant combining characters. */
! 122: static const struct { unsigned short base; unsigned short composed; } shift_jisx0213_comp_table_data[] = {
! 123: #define shift_jisx0213_comp_table02e5_idx 0
! 124: #define shift_jisx0213_comp_table02e5_len 1
! 125: { 0x8684, 0x8685 }, /* 0x12B65 = 0x12B64 U+02E5 */
! 126: #define shift_jisx0213_comp_table02e9_idx (shift_jisx0213_comp_table02e5_idx+shift_jisx0213_comp_table02e5_len)
! 127: #define shift_jisx0213_comp_table02e9_len 1
! 128: { 0x8680, 0x8686 }, /* 0x12B66 = 0x12B60 U+02E9 */
! 129: #define shift_jisx0213_comp_table0300_idx (shift_jisx0213_comp_table02e9_idx+shift_jisx0213_comp_table02e9_len)
! 130: #define shift_jisx0213_comp_table0300_len 5
! 131: { 0x857b, 0x8663 }, /* 0x12B44 = 0x1295C U+0300 */
! 132: { 0x8657, 0x8667 }, /* 0x12B48 = 0x12B38 U+0300 */
! 133: { 0x8656, 0x8669 }, /* 0x12B4A = 0x12B37 U+0300 */
! 134: { 0x864f, 0x866b }, /* 0x12B4C = 0x12B30 U+0300 */
! 135: { 0x8662, 0x866d }, /* 0x12B4E = 0x12B43 U+0300 */
! 136: #define shift_jisx0213_comp_table0301_idx (shift_jisx0213_comp_table0300_idx+shift_jisx0213_comp_table0300_len)
! 137: #define shift_jisx0213_comp_table0301_len 4
! 138: { 0x8657, 0x8668 }, /* 0x12B49 = 0x12B38 U+0301 */
! 139: { 0x8656, 0x866a }, /* 0x12B4B = 0x12B37 U+0301 */
! 140: { 0x864f, 0x866c }, /* 0x12B4D = 0x12B30 U+0301 */
! 141: { 0x8662, 0x866e }, /* 0x12B4F = 0x12B43 U+0301 */
! 142: #define shift_jisx0213_comp_table309a_idx (shift_jisx0213_comp_table0301_idx+shift_jisx0213_comp_table0301_len)
! 143: #define shift_jisx0213_comp_table309a_len 14
! 144: { 0x82a9, 0x82f5 }, /* 0x12477 = 0x1242B U+309A */
! 145: { 0x82ab, 0x82f6 }, /* 0x12478 = 0x1242D U+309A */
! 146: { 0x82ad, 0x82f7 }, /* 0x12479 = 0x1242F U+309A */
! 147: { 0x82af, 0x82f8 }, /* 0x1247A = 0x12431 U+309A */
! 148: { 0x82b1, 0x82f9 }, /* 0x1247B = 0x12433 U+309A */
! 149: { 0x834a, 0x8397 }, /* 0x12577 = 0x1252B U+309A */
! 150: { 0x834c, 0x8398 }, /* 0x12578 = 0x1252D U+309A */
! 151: { 0x834e, 0x8399 }, /* 0x12579 = 0x1252F U+309A */
! 152: { 0x8350, 0x839a }, /* 0x1257A = 0x12531 U+309A */
! 153: { 0x8352, 0x839b }, /* 0x1257B = 0x12533 U+309A */
! 154: { 0x835a, 0x839c }, /* 0x1257C = 0x1253B U+309A */
! 155: { 0x8363, 0x839d }, /* 0x1257D = 0x12544 U+309A */
! 156: { 0x8367, 0x839e }, /* 0x1257E = 0x12548 U+309A */
! 157: { 0x83f3, 0x83f6 }, /* 0x12678 = 0x12675 U+309A */
! 158: };
! 159:
! 160: static int
! 161: shift_jisx0213_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
! 162: {
! 163: int count = 0;
! 164: unsigned short lasttwo = conv->ostate;
! 165:
! 166: if (lasttwo) {
! 167: /* Attempt to combine the last character with this one. */
! 168: unsigned int idx;
! 169: unsigned int len;
! 170:
! 171: if (wc == 0x02e5)
! 172: idx = shift_jisx0213_comp_table02e5_idx,
! 173: len = shift_jisx0213_comp_table02e5_len;
! 174: else if (wc == 0x02e9)
! 175: idx = shift_jisx0213_comp_table02e9_idx,
! 176: len = shift_jisx0213_comp_table02e9_len;
! 177: else if (wc == 0x0300)
! 178: idx = shift_jisx0213_comp_table0300_idx,
! 179: len = shift_jisx0213_comp_table0300_len;
! 180: else if (wc == 0x0301)
! 181: idx = shift_jisx0213_comp_table0301_idx,
! 182: len = shift_jisx0213_comp_table0301_len;
! 183: else if (wc == 0x309a)
! 184: idx = shift_jisx0213_comp_table309a_idx,
! 185: len = shift_jisx0213_comp_table309a_len;
! 186: else
! 187: goto not_combining;
! 188:
! 189: do
! 190: if (shift_jisx0213_comp_table_data[idx].base == lasttwo)
! 191: break;
! 192: while (++idx, --len > 0);
! 193:
! 194: if (len > 0) {
! 195: /* Output the combined character. */
! 196: if (n >= 2) {
! 197: lasttwo = shift_jisx0213_comp_table_data[idx].composed;
! 198: r[0] = (lasttwo >> 8) & 0xff;
! 199: r[1] = lasttwo & 0xff;
! 200: conv->ostate = 0;
! 201: return 2;
! 202: } else
! 203: return RET_TOOSMALL;
! 204: }
! 205:
! 206: not_combining:
! 207: /* Output the buffered character. */
! 208: if (n < 2)
! 209: return RET_TOOSMALL;
! 210: r[0] = (lasttwo >> 8) & 0xff;
! 211: r[1] = lasttwo & 0xff;
! 212: r += 2;
! 213: count = 2;
! 214: }
! 215:
! 216: if (wc < 0x80 && wc != 0x5c && wc != 0x7e) {
! 217: /* Plain ISO646-JP character. */
! 218: if (n > count) {
! 219: r[0] = (unsigned char) wc;
! 220: conv->ostate = 0;
! 221: return count+1;
! 222: } else
! 223: return RET_TOOSMALL;
! 224: } else if (wc == 0x00a5) {
! 225: if (n > count) {
! 226: r[0] = 0x5c;
! 227: conv->ostate = 0;
! 228: return count+1;
! 229: } else
! 230: return RET_TOOSMALL;
! 231: } else if (wc == 0x203e) {
! 232: if (n > count) {
! 233: r[0] = 0x7e;
! 234: conv->ostate = 0;
! 235: return count+1;
! 236: } else
! 237: return RET_TOOSMALL;
! 238: } else if (wc >= 0xff61 && wc <= 0xff9f) {
! 239: /* Half-width katakana. */
! 240: if (n > count) {
! 241: r[0] = wc - 0xfec0;
! 242: conv->ostate = 0;
! 243: return count+1;
! 244: } else
! 245: return RET_TOOSMALL;
! 246: } else {
! 247: unsigned int s1, s2;
! 248: unsigned short jch = ucs4_to_jisx0213(wc);
! 249: if (jch != 0) {
! 250: /* Convert it to shifted representation. */
! 251: s1 = jch >> 8;
! 252: s2 = jch & 0x7f;
! 253: s1 -= 0x21;
! 254: s2 -= 0x21;
! 255: if (s1 >= 0x5e) {
! 256: /* Handling of JISX 0213 plane 2 rows. */
! 257: if (s1 >= 0xcd) /* rows 0x26E..0x27E */
! 258: s1 -= 102;
! 259: else if (s1 >= 0x8b || s1 == 0x87) /* rows 0x228, 0x22C..0x22F */
! 260: s1 -= 40;
! 261: else /* rows 0x221, 0x223..0x225 */
! 262: s1 -= 34;
! 263: /* Now 0x5e <= s1 <= 0x77. */
! 264: }
! 265: if (s1 & 1)
! 266: s2 += 0x5e;
! 267: s1 = s1 >> 1;
! 268: if (s1 < 0x1f)
! 269: s1 += 0x81;
! 270: else
! 271: s1 += 0xc1;
! 272: if (s2 < 0x3f)
! 273: s2 += 0x40;
! 274: else
! 275: s2 += 0x41;
! 276: if (jch & 0x0080) {
! 277: /* A possible match in comp_table_data. We have to buffer it. */
! 278: /* We know it's a JISX 0213 plane 1 character. */
! 279: if (jch & 0x8000) abort();
! 280: conv->ostate = (s1 << 8) | s2;
! 281: return count+0;
! 282: }
! 283: /* Output the shifted representation. */
! 284: if (n >= count+2) {
! 285: r[0] = s1;
! 286: r[1] = s2;
! 287: conv->ostate = 0;
! 288: return count+2;
! 289: } else
! 290: return RET_TOOSMALL;
! 291: }
! 292: return RET_ILUNI;
! 293: }
! 294: }
! 295:
! 296: static int
! 297: shift_jisx0213_reset (conv_t conv, unsigned char *r, int n)
! 298: {
! 299: state_t lasttwo = conv->ostate;
! 300:
! 301: if (lasttwo) {
! 302: if (n < 2)
! 303: return RET_TOOSMALL;
! 304: r[0] = (lasttwo >> 8) & 0xff;
! 305: r[1] = lasttwo & 0xff;
! 306: /* conv->ostate = 0; will be done by the caller */
! 307: return 2;
! 308: } else
! 309: return 0;
! 310: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to shift_jisx0213.h CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / libiconv / lib