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glibc/iconvdata/johab.c
Siddhesh Poyarekar 30891f35fa Remove "Contributed by" lines 
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>
2021-09-03 22:06:44 +05:30

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/* Mapping tables for JOHAB handling.
Copyright (C) 1998-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C 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 C 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 C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <dlfcn.h>
#include <stdint.h>
#include <ksc5601.h>
/* The table for Bit pattern to Hangul Jamo
5 bits each are used to encode
leading consonants(19 + 1 filler), medial vowels(21 + 1 filler)
and trailing consonants(27 + 1 filler).
KS C 5601-1992 Annex 3 Table 2
0 : Filler, -1: invalid, >= 1 : valid
*/
static const int init[32] =
{
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
19, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
static const int mid[32] =
{
-1, -1, 0, 1, 2, 3, 4, 5,
-1, -1, 6, 7, 8, 9, 10, 11,
-1, -1, 12, 13, 14, 15, 16, 17,
-1, -1, 18, 19, 20, 21, -1, -1
};
static const int final[32] =
{
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
-1, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, -1, -1
};
/*
Hangul Jamo in Johab to Unicode 2.0 : Unicode 2.0
defines 51 Hangul Compatibility Jamos in the block [0x3131,0x314e]
It's to be considered later which Jamo block to use, Compatibility
block [0x3131,0x314e] or Hangul Conjoining Jamo block, [0x1100,0x11ff]
*/
static const uint32_t init_to_ucs[19] =
{
0x3131, 0x3132, 0x3134, 0x3137, 0x3138, 0x3139, 0x3141, 0x3142,
0x3143, 0x3145, 0x3146, 0x3147, 0x3148, 0x3149, 0x314a, 0x314b,
0x314c, 0x314d, 0x314e
};
static const uint32_t final_to_ucs[31] =
{
L'\0', L'\0', 0x3133, L'\0', 0x3135, 0x3136, L'\0', L'\0',
0x313a, 0x313b, 0x313c, 0x313d, 0x313e, 0x313f,
0x3140, L'\0', L'\0', 0x3144, L'\0', L'\0', L'\0', L'\0',
L'\0', L'\0', L'\0', L'\0', L'\0', L'\0', L'\0', L'\0', L'\0'
};
/* The following three arrays are used to convert
precomposed Hangul syllables in [0xac00,0xd???]
to Jamo bit patterns for Johab encoding
cf. : KS C 5601-1992, Annex3 Table 2
Arrays are used to speed up things although it's possible
to get the same result arithmetically.
*/
static const int init_to_bit[19] =
{
0x8800, 0x8c00, 0x9000, 0x9400, 0x9800, 0x9c00,
0xa000, 0xa400, 0xa800, 0xac00, 0xb000, 0xb400,
0xb800, 0xbc00, 0xc000, 0xc400, 0xc800, 0xcc00,
0xd000
};
static const int mid_to_bit[21] =
{
0x0060, 0x0080, 0x00a0, 0x00c0, 0x00e0,
0x0140, 0x0160, 0x0180, 0x01a0, 0x01c0, 0x1e0,
0x0240, 0x0260, 0x0280, 0x02a0, 0x02c0, 0x02e0,
0x0340, 0x0360, 0x0380, 0x03a0
};
static const int final_to_bit[28] =
{
1, 2, 3, 4, 5, 6, 7, 8, 9, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d
};
/* The conversion table from
UCS4 Hangul Compatibility Jamo in [0x3131,0x3163]
to Johab
cf. 1. KS C 5601-1992 Annex 3 Table 2
2. Unicode 2.0 manual
*/
static const uint16_t jamo_from_ucs_table[51] =
{
0x8841, 0x8c41,
0x8444,
0x9041,
0x8446, 0x8447,
0x9441, 0x9841, 0x9c41,
0x844a, 0x844b, 0x844c, 0x844d, 0x844e, 0x844f, 0x8450,
0xa041, 0xa441, 0xa841,
0x8454,
0xac41, 0xb041, 0xb441, 0xb841, 0xbc41,
0xc041, 0xc441, 0xc841, 0xcc41, 0xd041,
0x8461, 0x8481, 0x84a1, 0x84c1, 0x84e1,
0x8541, 0x8561, 0x8581, 0x85a1, 0x85c1, 0x85e1,
0x8641, 0x8661, 0x8681, 0x86a1, 0x86c1, 0x86e1,
0x8741, 0x8761, 0x8781, 0x87a1
};
static uint32_t
johab_sym_hanja_to_ucs (uint_fast32_t idx, uint_fast32_t c1, uint_fast32_t c2)
{
if (idx <= 0xdefe)
return (uint32_t) __ksc5601_sym_to_ucs[(c1 - 0xd9) * 188 + c2
- (c2 > 0x90 ? 0x43 : 0x31)];
else
return (uint32_t) __ksc5601_hanja_to_ucs[(c1 - 0xe0) * 188 + c2
- (c2 > 0x90 ? 0x43 : 0x31)];
}
/* Definitions used in the body of the `gconv' function. */
#define CHARSET_NAME "JOHAB//"
#define FROM_LOOP from_johab
#define TO_LOOP to_johab
#define DEFINE_INIT 1
#define DEFINE_FINI 1
#define MIN_NEEDED_FROM 1
#define MAX_NEEDED_FROM 2
#define MIN_NEEDED_TO 4
#define ONE_DIRECTION 0
/* First define the conversion function from JOHAB to UCS4. */
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
uint32_t ch = *inptr; \
\
if (ch <= 0x7f) \
{ \
/* Plain ISO646-KR. */ \
if (ch == 0x5c) \
ch = 0x20a9; /* half-width Korean Currency WON sign */ \
++inptr; \
} \
/* Johab : 1. Hangul \
1st byte : 0x84-0xd3 \
2nd byte : 0x41-0x7e, 0x81-0xfe \
2. Hanja & Symbol : \
1st byte : 0xd8-0xde, 0xe0-0xf9 \
2nd byte : 0x31-0x7e, 0x91-0xfe \
0xd831-0xd87e and 0xd891-0xd8fe are user-defined area */ \
else \
{ \
if (__builtin_expect (ch > 0xf9, 0) \
|| __builtin_expect (ch == 0xdf, 0) \
|| (__builtin_expect (ch > 0x7e, 0) && ch < 0x84) \
|| (__builtin_expect (ch > 0xd3, 0) && ch < 0xd9)) \
{ \
/* These are illegal. */ \
STANDARD_FROM_LOOP_ERR_HANDLER (1); \
} \
else \
{ \
/* Two-byte character. First test whether the next \
character is also available. */ \
uint32_t ch2; \
uint_fast32_t idx; \
\
if (__glibc_unlikely (inptr + 1 >= inend)) \
{ \
/* The second character is not available. Store the \
intermediate result. */ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
\
ch2 = inptr[1]; \
idx = ch * 256 + ch2; \
if (__glibc_likely (ch <= 0xd3)) \
{ \
/* Hangul */ \
int_fast32_t i, m, f; \
\
i = init[(idx & 0x7c00) >> 10]; \
m = mid[(idx & 0x03e0) >> 5]; \
f = final[idx & 0x001f]; \
\
if (__builtin_expect (i == -1, 0) \
|| __builtin_expect (m == -1, 0) \
|| __builtin_expect (f == -1, 0)) \
{ \
/* This is illegal. */ \
STANDARD_FROM_LOOP_ERR_HANDLER (1); \
} \
else if (i > 0 && m > 0) \
ch = ((i - 1) * 21 + (m - 1)) * 28 + f + 0xac00; \
else if (i > 0 && m == 0 && f == 0) \
ch = init_to_ucs[i - 1]; \
else if (i == 0 && m > 0 && f == 0) \
ch = 0x314e + m; /* 0x314f + m - 1 */ \
else if (__builtin_expect ((i | m) == 0, 1) \
&& __builtin_expect (f > 0, 1)) \
ch = final_to_ucs[f - 1]; /* round trip?? */ \
else \
{ \
/* This is illegal. */ \
STANDARD_FROM_LOOP_ERR_HANDLER (1); \
} \
} \
else \
{ \
if (__builtin_expect (ch2 < 0x31, 0) \
|| (__builtin_expect (ch2 > 0x7e, 0) && ch2 < 0x91) \
|| __builtin_expect (ch2, 0) == 0xff \
|| (__builtin_expect (ch, 0) == 0xd9 && ch2 > 0xe8) \
|| (__builtin_expect (ch, 0) == 0xda \
&& ch2 > 0xa0 && ch2 < 0xd4) \
|| (__builtin_expect (ch, 0) == 0xde && ch2 > 0xf1)) \
{ \
/* This is illegal. */ \
STANDARD_FROM_LOOP_ERR_HANDLER (1); \
} \
else \
{ \
ch = johab_sym_hanja_to_ucs (idx, ch, ch2); \
/* if (idx <= 0xdefe) \
ch = __ksc5601_sym_to_ucs[(ch - 0xd9) * 192 \
+ ch2 - (ch2 > 0x90 \
? 0x43 : 0x31)]; \
else \
ch = __ksc5601_hanja_to_ucs[(ch - 0xe0) *192 \
+ ch2 - (ch2 > 0x90 \
?0x43 : 0x31)];\
*/ \
} \
} \
} \
\
if (__glibc_unlikely (ch == 0)) \
{ \
/* This is an illegal character. */ \
STANDARD_FROM_LOOP_ERR_HANDLER (2); \
} \
\
inptr += 2; \
} \
\
put32 (outptr, ch); \
outptr += 4; \
}
#define LOOP_NEED_FLAGS
#define ONEBYTE_BODY \
{ \
if (c <= 0x7f) \
return (c == 0x5c ? 0x20a9 : c); \
else \
return WEOF; \
}
#include <iconv/loop.c>
/* Next, define the other direction. */
#define MIN_NEEDED_INPUT MIN_NEEDED_TO
#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
#define LOOPFCT TO_LOOP
#define BODY \
{ \
uint32_t ch = get32 (inptr); \
/* \
if (ch >= (sizeof (from_ucs4_lat1) / sizeof (from_ucs4_lat1[0]))) \
{ \
if (ch >= 0x0391 && ch <= 0x0451) \
cp = from_ucs4_greek[ch - 0x391]; \
else if (ch >= 0x2010 && ch <= 0x9fa0) \
cp = from_ucs4_cjk[ch - 0x02010]; \
else \
break; \
} \
else \
cp = from_ucs4_lat1[ch]; \
*/ \
\
if (ch <= 0x7f && ch != 0x5c) \
*outptr++ = ch; \
else \
{ \
if (ch >= 0xac00 && ch <= 0xd7a3) \
{ \
if (__glibc_unlikely (outptr + 2 > outend)) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
ch -= 0xac00; \
\
ch = (init_to_bit[ch / 588] /* 21 * 28 = 588 */ \
+ mid_to_bit[(ch / 28) % 21]/* (ch % (21 * 28)) / 28 */ \
+ final_to_bit[ch % 28]); /* (ch % (21 * 28)) % 28 */ \
\
*outptr++ = ch / 256; \
*outptr++ = ch % 256; \
} \
/* KS C 5601-1992 Annex 3 regards 0xA4DA(Hangul Filler : U3164) \
as symbol */ \
else if (ch >= 0x3131 && ch <= 0x3163) \
{ \
ch = jamo_from_ucs_table[ch - 0x3131]; \
\
if (__glibc_unlikely (outptr + 2 > outend)) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
*outptr++ = ch / 256; \
*outptr++ = ch % 256; \
} \
else if ((ch >= 0x4e00 && ch <= 0x9fa5) \
|| (ch >= 0xf900 && ch <= 0xfa0b)) \
{ \
size_t written; \
uint32_t temp; \
\
written = ucs4_to_ksc5601_hanja (ch, outptr, outend - outptr); \
if (__builtin_expect (written, 1) == 0) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
if (__glibc_unlikely (written == __UNKNOWN_10646_CHAR)) \
{ \
STANDARD_TO_LOOP_ERR_HANDLER (4); \
} \
\
outptr[0] -= 0x4a; \
outptr[1] -= 0x21; \
\
temp = outptr[0] * 94 + outptr[1]; \
\
outptr[0] = 0xe0 + temp / 188; \
outptr[1] = temp % 188; \
outptr[1] += outptr[1] >= 78 ? 0x43 : 0x31; \
\
outptr += 2; \
} \
else if (ch == 0x20a9) \
*outptr++ = 0x5c; \
else \
{ \
size_t written; \
uint32_t temp; \
\
written = ucs4_to_ksc5601_sym (ch, outptr, outend - outptr); \
if (__builtin_expect (written, 1) == 0) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
if (__builtin_expect (written == __UNKNOWN_10646_CHAR, 0) \
|| (outptr[0] == 0x22 && outptr[1] > 0x68)) \
{ \
UNICODE_TAG_HANDLER (ch, 4); \
STANDARD_TO_LOOP_ERR_HANDLER (4); \
} \
\
temp = (outptr[0] < 0x4a ? outptr[0] + 0x191 : outptr[0] + 0x176);\
outptr[1] += (temp % 2 ? 0x5e : 0); \
outptr[1] += (outptr[1] < 0x6f ? 0x10 : 0x22); \
outptr[0] = temp / 2; \
\
outptr += 2; \
} \
} \
\
inptr += 4; \
}
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>
/* Now define the toplevel functions. */
#include <iconv/skeleton.c>
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