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We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
274 lines
7.5 KiB
C
274 lines
7.5 KiB
C
/* Access functions for CNS 11643 handling.
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Copyright (C) 1998-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdint.h>
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/* Table for CNS 11643, plane 1 to UCS4 conversion. */
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extern const uint16_t __cns11643l1_to_ucs4_tab[];
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/* Table for CNS 11643, plane 2 to UCS4 conversion. */
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extern const uint16_t __cns11643l2_to_ucs4_tab[];
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/* Table for CNS 11643, plane 3 to UCS4 conversion. */
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extern const uint32_t __cns11643l3_to_ucs4_tab[];
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/* Table for CNS 11643, plane 4 to UCS4 conversion. */
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extern const uint32_t __cns11643l4_to_ucs4_tab[];
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/* Table for CNS 11643, plane 5 to UCS4 conversion. */
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extern const uint32_t __cns11643l5_to_ucs4_tab[];
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/* Table for CNS 11643, plane 6 to UCS4 conversion. */
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extern const uint32_t __cns11643l6_to_ucs4_tab[];
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/* Table for CNS 11643, plane 7 to UCS4 conversion. */
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extern const uint32_t __cns11643l7_to_ucs4_tab[];
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/* Table for CNS 11643, plane 15 (old) to UCS4 conversion. */
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extern const uint32_t __cns11643l15_to_ucs4_tab[];
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static inline uint32_t
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__attribute ((always_inline))
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cns11643_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)
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{
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unsigned char ch = *(*s);
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unsigned char ch2;
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unsigned char ch3;
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uint32_t result;
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int idx;
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if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x30)
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return __UNKNOWN_10646_CHAR;
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if (avail < 3)
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return 0;
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ch2 = (*s)[1];
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if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
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return __UNKNOWN_10646_CHAR;
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ch3 = (*s)[2];
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if ((ch3 - offset) <= 0x20 || (ch3 - offset) >= 0x7f)
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return __UNKNOWN_10646_CHAR;
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idx = (ch2 - 0x21 - offset) * 94 + (ch3 - 0x21 - offset);
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switch (ch - 0x20 - offset)
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{
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case 1:
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if (idx > 0x21f2)
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return __UNKNOWN_10646_CHAR;
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result = __cns11643l1_to_ucs4_tab[idx];
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break;
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case 2:
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if (idx > 0x1de1)
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return __UNKNOWN_10646_CHAR;
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result = __cns11643l2_to_ucs4_tab[idx];
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break;
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case 3:
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if (idx > 0x19bd)
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return __UNKNOWN_10646_CHAR;
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result = __cns11643l3_to_ucs4_tab[idx];
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break;
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case 4:
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if (idx > 0x1c81)
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return __UNKNOWN_10646_CHAR;
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result = __cns11643l4_to_ucs4_tab[idx];
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break;
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case 5:
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if (idx > 0x219a)
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return __UNKNOWN_10646_CHAR;
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result = __cns11643l5_to_ucs4_tab[idx];
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break;
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case 6:
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if (idx > 0x18f3)
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return __UNKNOWN_10646_CHAR;
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result = __cns11643l6_to_ucs4_tab[idx];
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break;
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case 7:
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if (idx > 0x198a)
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return __UNKNOWN_10646_CHAR;
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result = __cns11643l7_to_ucs4_tab[idx];
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break;
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case 15:
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if (idx > 0x1c00)
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return __UNKNOWN_10646_CHAR;
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result = __cns11643l15_to_ucs4_tab[idx];
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break;
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default:
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return __UNKNOWN_10646_CHAR;
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}
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if (result != L'\0')
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(*s) += 3;
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else
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result = __UNKNOWN_10646_CHAR;
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return result;
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}
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/* Tables for the UCS4 -> CNS conversion. */
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extern const char __cns11643l1_from_ucs4_tab1[][2];
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extern const char __cns11643l1_from_ucs4_tab2[][2];
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extern const char __cns11643l1_from_ucs4_tab3[][2];
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extern const char __cns11643l1_from_ucs4_tab4[][2];
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extern const char __cns11643l1_from_ucs4_tab5[][2];
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extern const char __cns11643l1_from_ucs4_tab6[][2];
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extern const char __cns11643l1_from_ucs4_tab7[][2];
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extern const char __cns11643l1_from_ucs4_tab8[][2];
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extern const char __cns11643l1_from_ucs4_tab9[][2];
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extern const char __cns11643l1_from_ucs4_tab10[][2];
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extern const char __cns11643l1_from_ucs4_tab11[][2];
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extern const char __cns11643l1_from_ucs4_tab12[][2];
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extern const char __cns11643l1_from_ucs4_tab13[][2];
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extern const char __cns11643l1_from_ucs4_tab14[][2];
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extern const char __cns11643_from_ucs4p0_tab[][3];
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extern const char __cns11643_from_ucs4p2_tab[][3];
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extern const char __cns11643_from_ucs4p2c_tab[][3];
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static inline size_t
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__attribute ((always_inline))
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ucs4_to_cns11643 (uint32_t wch, unsigned char *s, size_t avail)
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{
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unsigned int ch = (unsigned int) wch;
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char buf[2];
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const char *cp = buf;
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size_t needed = 2;
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switch (ch)
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{
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case 0xa7 ... 0xf7:
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cp = __cns11643l1_from_ucs4_tab1[ch - 0xa7];
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break;
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case 0x2c7 ... 0x2d9:
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cp = __cns11643l1_from_ucs4_tab2[ch - 0x2c7];
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break;
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case 0x391 ... 0x3c9:
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cp = __cns11643l1_from_ucs4_tab3[ch - 0x391];
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break;
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case 0x2013 ... 0x203e:
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cp = __cns11643l1_from_ucs4_tab4[ch - 0x2013];
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break;
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case 0x2103:
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cp = "\x22\x6a";
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break;
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case 0x2105:
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cp = "\x22\x22";
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break;
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case 0x2109:
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cp = "\x22\x6b";
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break;
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case 0x2160 ... 0x2169:
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buf[0] = '\x24';
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buf[1] = '\x2b' + (ch - 0x2160);
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break;
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case 0x2170 ... 0x2179:
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buf[0] = '\x26';
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buf[1] = '\x35' + (ch - 0x2170);
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break;
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case 0x2190 ... 0x2199:
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cp = __cns11643l1_from_ucs4_tab5[ch - 0x2190];
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break;
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case 0x2215 ... 0x2267:
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cp = __cns11643l1_from_ucs4_tab6[ch - 0x2215];
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break;
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case 0x22a5:
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cp = "\x22\x47";
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break;
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case 0x22bf:
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cp = "\x22\x4a";
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break;
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case 0x2400 ... 0x2421:
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cp = __cns11643l1_from_ucs4_tab7[ch - 0x2400];
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break;
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case 0x2460 ... 0x247d:
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cp = __cns11643l1_from_ucs4_tab8[ch - 0x2460];
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break;
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case 0x2500 ... 0x2642:
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cp = __cns11643l1_from_ucs4_tab9[ch - 0x2500];
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break;
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case 0x3000 ... 0x3029:
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cp = __cns11643l1_from_ucs4_tab10[ch - 0x3000];
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break;
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case 0x30fb:
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cp = "\x21\x26";
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break;
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case 0x3105 ... 0x3129:
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buf[0] = '\x25';
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buf[1] = '\x47' + (ch - 0x3105);
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break;
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case 0x32a3:
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cp = "\x22\x21";
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break;
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case 0x338e ... 0x33d5:
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cp = __cns11643l1_from_ucs4_tab11[ch - 0x338e];
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break;
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case 0x4e00 ... 0x9f9c:
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cp = __cns11643l1_from_ucs4_tab12[ch - 0x4e00];
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if (cp[0] != '\0')
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break;
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/* Let's try the other planes. */
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/* Fall through. */
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case 0x3400 ... 0x4dff:
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case 0x9f9d ... 0x9fa5:
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/* Let's try the other planes. */
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needed = 3;
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cp = __cns11643_from_ucs4p0_tab[ch - 0x3400];
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break;
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case 0xfa28:
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needed = 3;
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cp = "\x0f\x58\x4c";
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break;
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case 0xfe30 ... 0xfe6b:
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cp = __cns11643l1_from_ucs4_tab13[ch - 0xfe30];
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break;
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case 0xff01 ... 0xff5d:
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cp = __cns11643l1_from_ucs4_tab14[ch - 0xff01];
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break;
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case 0xffe0:
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cp = "\x22\x66";
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break;
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case 0xffe1:
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cp = "\x22\x67";
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break;
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case 0xffe5:
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cp = "\x22\x64";
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break;
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case 0x20000 ... 0x2a6d6:
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needed = 3;
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cp = __cns11643_from_ucs4p2_tab[ch - 0x20000];
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break;
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case 0x2f800 ... 0x2fa1d:
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needed = 3;
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cp = __cns11643_from_ucs4p2c_tab[ch - 0x2f800];
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break;
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default:
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return __UNKNOWN_10646_CHAR;
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}
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if (cp[0] == '\0')
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return __UNKNOWN_10646_CHAR;
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if (avail < needed)
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return 0;
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s[0] = cp[0];
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s[1] = cp[1];
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if (needed == 3)
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s[2] = cp[2];
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return needed;
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}
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