1388 lines
50 KiB
C++
1388 lines
50 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
**********************************************************************
|
|
* Copyright (C) 2000-2016, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
**********************************************************************
|
|
* file name: ucnv_lmb.cpp
|
|
* encoding: UTF-8
|
|
* tab size: 4 (not used)
|
|
* indentation:4
|
|
*
|
|
* created on: 2000feb09
|
|
* created by: Brendan Murray
|
|
* extensively hacked up by: Jim Snyder-Grant
|
|
*
|
|
* Modification History:
|
|
*
|
|
* Date Name Description
|
|
*
|
|
* 06/20/2000 helena OS/400 port changes; mostly typecast.
|
|
* 06/27/2000 Jim Snyder-Grant Deal with partial characters and small buffers.
|
|
* Add comments to document LMBCS format and implementation
|
|
* restructured order & breakdown of functions
|
|
* 06/28/2000 helena Major rewrite for the callback API changes.
|
|
*/
|
|
|
|
#include "unicode/utypes.h"
|
|
|
|
#if !UCONFIG_NO_CONVERSION && !UCONFIG_NO_LEGACY_CONVERSION && !UCONFIG_ONLY_HTML_CONVERSION
|
|
|
|
#include "unicode/ucnv_err.h"
|
|
#include "unicode/ucnv.h"
|
|
#include "unicode/uset.h"
|
|
#include "cmemory.h"
|
|
#include "cstring.h"
|
|
#include "uassert.h"
|
|
#include "ucnv_imp.h"
|
|
#include "ucnv_bld.h"
|
|
#include "ucnv_cnv.h"
|
|
|
|
#ifdef EBCDIC_RTL
|
|
#include "ascii_a.h"
|
|
#endif
|
|
|
|
/*
|
|
LMBCS
|
|
|
|
(Lotus Multi-Byte Character Set)
|
|
|
|
LMBCS was invented in the late 1980's and is primarily used in Lotus Notes
|
|
databases and in Lotus 1-2-3 files. Programmers who work with the APIs
|
|
into these products will sometimes need to deal with strings in this format.
|
|
|
|
The code in this file provides an implementation for an ICU converter of
|
|
LMBCS to and from Unicode.
|
|
|
|
Since the LMBCS character set is only sparsely documented in existing
|
|
printed or online material, we have added extensive annotation to this
|
|
file to serve as a guide to understanding LMBCS.
|
|
|
|
LMBCS was originally designed with these four sometimes-competing design goals:
|
|
|
|
-Provide encodings for the characters in 12 existing national standards
|
|
(plus a few other characters)
|
|
-Minimal memory footprint
|
|
-Maximal speed of conversion into the existing national character sets
|
|
-No need to track a changing state as you interpret a string.
|
|
|
|
|
|
All of the national character sets LMBCS was trying to encode are 'ANSI'
|
|
based, in that the bytes from 0x20 - 0x7F are almost exactly the
|
|
same common Latin unaccented characters and symbols in all character sets.
|
|
|
|
So, in order to help meet the speed & memory design goals, the common ANSI
|
|
bytes from 0x20-0x7F are represented by the same single-byte values in LMBCS.
|
|
|
|
The general LMBCS code unit is from 1-3 bytes. We can describe the 3 bytes as
|
|
follows:
|
|
|
|
[G] D1 [D2]
|
|
|
|
That is, a sometimes-optional 'group' byte, followed by 1 and sometimes 2
|
|
data bytes. The maximum size of a LMBCS character is 3 bytes:
|
|
*/
|
|
#define ULMBCS_CHARSIZE_MAX 3
|
|
/*
|
|
The single-byte values from 0x20 to 0x7F are examples of single D1 bytes.
|
|
We often have to figure out if byte values are below or above this, so we
|
|
use the ANSI nomenclature 'C0' and 'C1' to refer to the range of control
|
|
characters just above & below the common lower-ANSI range */
|
|
#define ULMBCS_C0END 0x1F
|
|
#define ULMBCS_C1START 0x80
|
|
/*
|
|
Since LMBCS is always dealing in byte units. we create a local type here for
|
|
dealing with these units of LMBCS code units:
|
|
|
|
*/
|
|
typedef uint8_t ulmbcs_byte_t;
|
|
|
|
/*
|
|
Most of the values less than 0x20 are reserved in LMBCS to announce
|
|
which national character standard is being used for the 'D' bytes.
|
|
In the comments we show the common name and the IBM character-set ID
|
|
for these character-set announcers:
|
|
*/
|
|
|
|
#define ULMBCS_GRP_L1 0x01 /* Latin-1 :ibm-850 */
|
|
#define ULMBCS_GRP_GR 0x02 /* Greek :ibm-851 */
|
|
#define ULMBCS_GRP_HE 0x03 /* Hebrew :ibm-1255 */
|
|
#define ULMBCS_GRP_AR 0x04 /* Arabic :ibm-1256 */
|
|
#define ULMBCS_GRP_RU 0x05 /* Cyrillic :ibm-1251 */
|
|
#define ULMBCS_GRP_L2 0x06 /* Latin-2 :ibm-852 */
|
|
#define ULMBCS_GRP_TR 0x08 /* Turkish :ibm-1254 */
|
|
#define ULMBCS_GRP_TH 0x0B /* Thai :ibm-874 */
|
|
#define ULMBCS_GRP_JA 0x10 /* Japanese :ibm-943 */
|
|
#define ULMBCS_GRP_KO 0x11 /* Korean :ibm-1261 */
|
|
#define ULMBCS_GRP_TW 0x12 /* Chinese SC :ibm-950 */
|
|
#define ULMBCS_GRP_CN 0x13 /* Chinese TC :ibm-1386 */
|
|
|
|
/*
|
|
So, the beginning of understanding LMBCS is that IF the first byte of a LMBCS
|
|
character is one of those 12 values, you can interpret the remaining bytes of
|
|
that character as coming from one of those character sets. Since the lower
|
|
ANSI bytes already are represented in single bytes, using one of the character
|
|
set announcers is used to announce a character that starts with a byte of
|
|
0x80 or greater.
|
|
|
|
The character sets are arranged so that the single byte sets all appear
|
|
before the multi-byte character sets. When we need to tell whether a
|
|
group byte is for a single byte char set or not we use this define: */
|
|
|
|
#define ULMBCS_DOUBLEOPTGROUP_START 0x10
|
|
|
|
/*
|
|
However, to fully understand LMBCS, you must also understand a series of
|
|
exceptions & optimizations made in service of the design goals.
|
|
|
|
First, those of you who are character set mavens may have noticed that
|
|
the 'double-byte' character sets are actually multi-byte character sets
|
|
that can have 1 or two bytes, even in the upper-ascii range. To force
|
|
each group byte to introduce a fixed-width encoding (to make it faster to
|
|
count characters), we use a convention of doubling up on the group byte
|
|
to introduce any single-byte character > 0x80 in an otherwise double-byte
|
|
character set. So, for example, the LMBCS sequence x10 x10 xAE is the
|
|
same as '0xAE' in the Japanese code page 943.
|
|
|
|
Next, you will notice that the list of group bytes has some gaps.
|
|
These are used in various ways.
|
|
|
|
We reserve a few special single byte values for common control
|
|
characters. These are in the same place as their ANSI equivalents for speed.
|
|
*/
|
|
|
|
#define ULMBCS_HT 0x09 /* Fixed control char - Horizontal Tab */
|
|
#define ULMBCS_LF 0x0A /* Fixed control char - Line Feed */
|
|
#define ULMBCS_CR 0x0D /* Fixed control char - Carriage Return */
|
|
|
|
/* Then, 1-2-3 reserved a special single-byte character to put at the
|
|
beginning of internal 'system' range names: */
|
|
|
|
#define ULMBCS_123SYSTEMRANGE 0x19
|
|
|
|
/* Then we needed a place to put all the other ansi control characters
|
|
that must be moved to different values because LMBCS reserves those
|
|
values for other purposes. To represent the control characters, we start
|
|
with a first byte of 0xF & add the control character value as the
|
|
second byte */
|
|
#define ULMBCS_GRP_CTRL 0x0F
|
|
|
|
/* For the C0 controls (less than 0x20), we add 0x20 to preserve the
|
|
useful doctrine that any byte less than 0x20 in a LMBCS char must be
|
|
the first byte of a character:*/
|
|
#define ULMBCS_CTRLOFFSET 0x20
|
|
|
|
/*
|
|
Where to put the characters that aren't part of any of the 12 national
|
|
character sets? The first thing that was done, in the earlier years of
|
|
LMBCS, was to use up the spaces of the form
|
|
|
|
[G] D1,
|
|
|
|
where 'G' was one of the single-byte character groups, and
|
|
D1 was less than 0x80. These sequences are gathered together
|
|
into a Lotus-invented doublebyte character set to represent a
|
|
lot of stray values. Internally, in this implementation, we track this
|
|
as group '0', as a place to tuck this exceptions list.*/
|
|
|
|
#define ULMBCS_GRP_EXCEPT 0x00
|
|
/*
|
|
Finally, as the durability and usefulness of UNICODE became clear,
|
|
LOTUS added a new group 0x14 to hold Unicode values not otherwise
|
|
represented in LMBCS: */
|
|
#define ULMBCS_GRP_UNICODE 0x14
|
|
/* The two bytes appearing after a 0x14 are interpreted as UFT-16 BE
|
|
(Big-Endian) characters. The exception comes when the UTF16
|
|
representation would have a zero as the second byte. In that case,
|
|
'F6' is used in its place, and the bytes are swapped. (This prevents
|
|
LMBCS from encoding any Unicode values of the form U+F6xx, but that's OK:
|
|
0xF6xx is in the middle of the Private Use Area.)*/
|
|
#define ULMBCS_UNICOMPATZERO 0xF6
|
|
|
|
/* It is also useful in our code to have a constant for the size of
|
|
a LMBCS char that holds a literal Unicode value */
|
|
#define ULMBCS_UNICODE_SIZE 3
|
|
|
|
/*
|
|
To squish the LMBCS representations down even further, and to make
|
|
translations even faster,sometimes the optimization group byte can be dropped
|
|
from a LMBCS character. This is decided on a process-by-process basis. The
|
|
group byte that is dropped is called the 'optimization group'.
|
|
|
|
For Notes, the optimzation group is always 0x1.*/
|
|
#define ULMBCS_DEFAULTOPTGROUP 0x1
|
|
/* For 1-2-3 files, the optimzation group is stored in the header of the 1-2-3
|
|
file.
|
|
|
|
In any case, when using ICU, you either pass in the
|
|
optimization group as part of the name of the converter (LMBCS-1, LMBCS-2,
|
|
etc.). Using plain 'LMBCS' as the name of the converter will give you
|
|
LMBCS-1.
|
|
|
|
|
|
*** Implementation strategy ***
|
|
|
|
|
|
Because of the extensive use of other character sets, the LMBCS converter
|
|
keeps a mapping between optimization groups and IBM character sets, so that
|
|
ICU converters can be created and used as needed. */
|
|
|
|
/* As you can see, even though any byte below 0x20 could be an optimization
|
|
byte, only those at 0x13 or below can map to an actual converter. To limit
|
|
some loops and searches, we define a value for that last group converter:*/
|
|
|
|
#define ULMBCS_GRP_LAST 0x13 /* last LMBCS group that has a converter */
|
|
|
|
static const char * const OptGroupByteToCPName[ULMBCS_GRP_LAST + 1] = {
|
|
/* 0x0000 */ "lmb-excp", /* internal home for the LOTUS exceptions list */
|
|
/* 0x0001 */ "ibm-850",
|
|
/* 0x0002 */ "ibm-851",
|
|
/* 0x0003 */ "windows-1255",
|
|
/* 0x0004 */ "windows-1256",
|
|
/* 0x0005 */ "windows-1251",
|
|
/* 0x0006 */ "ibm-852",
|
|
/* 0x0007 */ NULL, /* Unused */
|
|
/* 0x0008 */ "windows-1254",
|
|
/* 0x0009 */ NULL, /* Control char HT */
|
|
/* 0x000A */ NULL, /* Control char LF */
|
|
/* 0x000B */ "windows-874",
|
|
/* 0x000C */ NULL, /* Unused */
|
|
/* 0x000D */ NULL, /* Control char CR */
|
|
/* 0x000E */ NULL, /* Unused */
|
|
/* 0x000F */ NULL, /* Control chars: 0x0F20 + C0/C1 character: algorithmic */
|
|
/* 0x0010 */ "windows-932",
|
|
/* 0x0011 */ "windows-949",
|
|
/* 0x0012 */ "windows-950",
|
|
/* 0x0013 */ "windows-936"
|
|
|
|
/* The rest are null, including the 0x0014 Unicode compatibility region
|
|
and 0x0019, the 1-2-3 system range control char */
|
|
};
|
|
|
|
|
|
/* That's approximately all the data that's needed for translating
|
|
LMBCS to Unicode.
|
|
|
|
|
|
However, to translate Unicode to LMBCS, we need some more support.
|
|
|
|
That's because there are often more than one possible mappings from a Unicode
|
|
code point back into LMBCS. The first thing we do is look up into a table
|
|
to figure out if there are more than one possible mappings. This table,
|
|
arranged by Unicode values (including ranges) either lists which group
|
|
to use, or says that it could go into one or more of the SBCS sets, or
|
|
into one or more of the DBCS sets. (If the character exists in both DBCS &
|
|
SBCS, the table will place it in the SBCS sets, to make the LMBCS code point
|
|
length as small as possible. Here's the two special markers we use to indicate
|
|
ambiguous mappings: */
|
|
|
|
#define ULMBCS_AMBIGUOUS_SBCS 0x80 /* could fit in more than one
|
|
LMBCS sbcs native encoding
|
|
(example: most accented latin) */
|
|
#define ULMBCS_AMBIGUOUS_MBCS 0x81 /* could fit in more than one
|
|
LMBCS mbcs native encoding
|
|
(example: Unihan) */
|
|
#define ULMBCS_AMBIGUOUS_ALL 0x82
|
|
/* And here's a simple way to see if a group falls in an appropriate range */
|
|
#define ULMBCS_AMBIGUOUS_MATCH(agroup, xgroup) \
|
|
((((agroup) == ULMBCS_AMBIGUOUS_SBCS) && \
|
|
(xgroup) < ULMBCS_DOUBLEOPTGROUP_START) || \
|
|
(((agroup) == ULMBCS_AMBIGUOUS_MBCS) && \
|
|
(xgroup) >= ULMBCS_DOUBLEOPTGROUP_START)) || \
|
|
((agroup) == ULMBCS_AMBIGUOUS_ALL)
|
|
|
|
|
|
/* The table & some code to use it: */
|
|
|
|
|
|
static const struct _UniLMBCSGrpMap
|
|
{
|
|
const UChar uniStartRange;
|
|
const UChar uniEndRange;
|
|
const ulmbcs_byte_t GrpType;
|
|
} UniLMBCSGrpMap[]
|
|
=
|
|
{
|
|
|
|
{0x0001, 0x001F, ULMBCS_GRP_CTRL},
|
|
{0x0080, 0x009F, ULMBCS_GRP_CTRL},
|
|
{0x00A0, 0x00A6, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x00A7, 0x00A8, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x00A9, 0x00AF, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x00B0, 0x00B1, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x00B2, 0x00B3, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x00B4, 0x00B4, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x00B5, 0x00B5, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x00B6, 0x00B6, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x00B7, 0x00D6, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x00D7, 0x00D7, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x00D8, 0x00F6, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x00F7, 0x00F7, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x00F8, 0x01CD, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x01CE, 0x01CE, ULMBCS_GRP_TW },
|
|
{0x01CF, 0x02B9, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x02BA, 0x02BA, ULMBCS_GRP_CN},
|
|
{0x02BC, 0x02C8, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x02C9, 0x02D0, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x02D8, 0x02DD, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x0384, 0x0390, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x0391, 0x03A9, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x03AA, 0x03B0, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x03B1, 0x03C9, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x03CA, 0x03CE, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x0400, 0x0400, ULMBCS_GRP_RU},
|
|
{0x0401, 0x0401, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x0402, 0x040F, ULMBCS_GRP_RU},
|
|
{0x0410, 0x0431, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x0432, 0x044E, ULMBCS_GRP_RU},
|
|
{0x044F, 0x044F, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x0450, 0x0491, ULMBCS_GRP_RU},
|
|
{0x05B0, 0x05F2, ULMBCS_GRP_HE},
|
|
{0x060C, 0x06AF, ULMBCS_GRP_AR},
|
|
{0x0E01, 0x0E5B, ULMBCS_GRP_TH},
|
|
{0x200C, 0x200F, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x2010, 0x2010, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2013, 0x2014, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x2015, 0x2015, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2016, 0x2016, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2017, 0x2017, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x2018, 0x2019, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x201A, 0x201B, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x201C, 0x201D, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x201E, 0x201F, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x2020, 0x2021, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x2022, 0x2024, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x2025, 0x2025, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2026, 0x2026, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x2027, 0x2027, ULMBCS_GRP_TW},
|
|
{0x2030, 0x2030, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x2031, 0x2031, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x2032, 0x2033, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2035, 0x2035, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2039, 0x203A, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x203B, 0x203B, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x203C, 0x203C, ULMBCS_GRP_EXCEPT},
|
|
{0x2074, 0x2074, ULMBCS_GRP_KO},
|
|
{0x207F, 0x207F, ULMBCS_GRP_EXCEPT},
|
|
{0x2081, 0x2084, ULMBCS_GRP_KO},
|
|
{0x20A4, 0x20AC, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x2103, 0x2109, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2111, 0x2120, ULMBCS_AMBIGUOUS_SBCS},
|
|
/*zhujin: upgrade, for regressiont test, spr HKIA4YHTSU*/
|
|
{0x2121, 0x2121, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2122, 0x2126, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x212B, 0x212B, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2135, 0x2135, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x2153, 0x2154, ULMBCS_GRP_KO},
|
|
{0x215B, 0x215E, ULMBCS_GRP_EXCEPT},
|
|
{0x2160, 0x2179, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2190, 0x2193, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x2194, 0x2195, ULMBCS_GRP_EXCEPT},
|
|
{0x2196, 0x2199, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x21A8, 0x21A8, ULMBCS_GRP_EXCEPT},
|
|
{0x21B8, 0x21B9, ULMBCS_GRP_CN},
|
|
{0x21D0, 0x21D1, ULMBCS_GRP_EXCEPT},
|
|
{0x21D2, 0x21D2, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x21D3, 0x21D3, ULMBCS_GRP_EXCEPT},
|
|
{0x21D4, 0x21D4, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x21D5, 0x21D5, ULMBCS_GRP_EXCEPT},
|
|
{0x21E7, 0x21E7, ULMBCS_GRP_CN},
|
|
{0x2200, 0x2200, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2201, 0x2201, ULMBCS_GRP_EXCEPT},
|
|
{0x2202, 0x2202, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2203, 0x2203, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2204, 0x2206, ULMBCS_GRP_EXCEPT},
|
|
{0x2207, 0x2208, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2209, 0x220A, ULMBCS_GRP_EXCEPT},
|
|
{0x220B, 0x220B, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x220F, 0x2215, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2219, 0x2219, ULMBCS_GRP_EXCEPT},
|
|
{0x221A, 0x221A, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x221B, 0x221C, ULMBCS_GRP_EXCEPT},
|
|
{0x221D, 0x221E, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x221F, 0x221F, ULMBCS_GRP_EXCEPT},
|
|
{0x2220, 0x2220, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2223, 0x222A, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x222B, 0x223D, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2245, 0x2248, ULMBCS_GRP_EXCEPT},
|
|
{0x224C, 0x224C, ULMBCS_GRP_TW},
|
|
{0x2252, 0x2252, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2260, 0x2261, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2262, 0x2265, ULMBCS_GRP_EXCEPT},
|
|
{0x2266, 0x226F, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2282, 0x2283, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2284, 0x2285, ULMBCS_GRP_EXCEPT},
|
|
{0x2286, 0x2287, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2288, 0x2297, ULMBCS_GRP_EXCEPT},
|
|
{0x2299, 0x22BF, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x22C0, 0x22C0, ULMBCS_GRP_EXCEPT},
|
|
{0x2310, 0x2310, ULMBCS_GRP_EXCEPT},
|
|
{0x2312, 0x2312, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2318, 0x2321, ULMBCS_GRP_EXCEPT},
|
|
{0x2318, 0x2321, ULMBCS_GRP_CN},
|
|
{0x2460, 0x24E9, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2500, 0x2500, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x2501, 0x2501, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2502, 0x2502, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x2503, 0x2503, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x2504, 0x2505, ULMBCS_GRP_TW},
|
|
{0x2506, 0x2665, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x2666, 0x2666, ULMBCS_GRP_EXCEPT},
|
|
{0x2667, 0x2669, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x266A, 0x266A, ULMBCS_AMBIGUOUS_ALL},
|
|
{0x266B, 0x266C, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x266D, 0x266D, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0x266E, 0x266E, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x266F, 0x266F, ULMBCS_GRP_JA},
|
|
{0x2670, 0x2E7F, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0x2E80, 0xF861, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0xF862, 0xF8FF, ULMBCS_GRP_EXCEPT},
|
|
{0xF900, 0xFA2D, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0xFB00, 0xFEFF, ULMBCS_AMBIGUOUS_SBCS},
|
|
{0xFF01, 0xFFEE, ULMBCS_AMBIGUOUS_MBCS},
|
|
{0xFFFF, 0xFFFF, ULMBCS_GRP_UNICODE}
|
|
};
|
|
|
|
static ulmbcs_byte_t
|
|
FindLMBCSUniRange(UChar uniChar)
|
|
{
|
|
const struct _UniLMBCSGrpMap * pTable = UniLMBCSGrpMap;
|
|
|
|
while (uniChar > pTable->uniEndRange)
|
|
{
|
|
pTable++;
|
|
}
|
|
|
|
if (uniChar >= pTable->uniStartRange)
|
|
{
|
|
return pTable->GrpType;
|
|
}
|
|
return ULMBCS_GRP_UNICODE;
|
|
}
|
|
|
|
/*
|
|
We also ask the creator of a converter to send in a preferred locale
|
|
that we can use in resolving ambiguous mappings. They send the locale
|
|
in as a string, and we map it, if possible, to one of the
|
|
LMBCS groups. We use this table, and the associated code, to
|
|
do the lookup: */
|
|
|
|
/**************************************************
|
|
This table maps locale ID's to LMBCS opt groups.
|
|
The default return is group 0x01. Note that for
|
|
performance reasons, the table is sorted in
|
|
increasing alphabetic order, with the notable
|
|
exception of zhTW. This is to force the check
|
|
for Traditonal Chinese before dropping back to
|
|
Simplified.
|
|
|
|
Note too that the Latin-1 groups have been
|
|
commented out because it's the default, and
|
|
this shortens the table, allowing a serial
|
|
search to go quickly.
|
|
*************************************************/
|
|
|
|
static const struct _LocaleLMBCSGrpMap
|
|
{
|
|
const char *LocaleID;
|
|
const ulmbcs_byte_t OptGroup;
|
|
} LocaleLMBCSGrpMap[] =
|
|
{
|
|
{"ar", ULMBCS_GRP_AR},
|
|
{"be", ULMBCS_GRP_RU},
|
|
{"bg", ULMBCS_GRP_L2},
|
|
/* {"ca", ULMBCS_GRP_L1}, */
|
|
{"cs", ULMBCS_GRP_L2},
|
|
/* {"da", ULMBCS_GRP_L1}, */
|
|
/* {"de", ULMBCS_GRP_L1}, */
|
|
{"el", ULMBCS_GRP_GR},
|
|
/* {"en", ULMBCS_GRP_L1}, */
|
|
/* {"es", ULMBCS_GRP_L1}, */
|
|
/* {"et", ULMBCS_GRP_L1}, */
|
|
/* {"fi", ULMBCS_GRP_L1}, */
|
|
/* {"fr", ULMBCS_GRP_L1}, */
|
|
{"he", ULMBCS_GRP_HE},
|
|
{"hu", ULMBCS_GRP_L2},
|
|
/* {"is", ULMBCS_GRP_L1}, */
|
|
/* {"it", ULMBCS_GRP_L1}, */
|
|
{"iw", ULMBCS_GRP_HE},
|
|
{"ja", ULMBCS_GRP_JA},
|
|
{"ko", ULMBCS_GRP_KO},
|
|
/* {"lt", ULMBCS_GRP_L1}, */
|
|
/* {"lv", ULMBCS_GRP_L1}, */
|
|
{"mk", ULMBCS_GRP_RU},
|
|
/* {"nl", ULMBCS_GRP_L1}, */
|
|
/* {"no", ULMBCS_GRP_L1}, */
|
|
{"pl", ULMBCS_GRP_L2},
|
|
/* {"pt", ULMBCS_GRP_L1}, */
|
|
{"ro", ULMBCS_GRP_L2},
|
|
{"ru", ULMBCS_GRP_RU},
|
|
{"sh", ULMBCS_GRP_L2},
|
|
{"sk", ULMBCS_GRP_L2},
|
|
{"sl", ULMBCS_GRP_L2},
|
|
{"sq", ULMBCS_GRP_L2},
|
|
{"sr", ULMBCS_GRP_RU},
|
|
/* {"sv", ULMBCS_GRP_L1}, */
|
|
{"th", ULMBCS_GRP_TH},
|
|
{"tr", ULMBCS_GRP_TR},
|
|
{"uk", ULMBCS_GRP_RU},
|
|
/* {"vi", ULMBCS_GRP_L1}, */
|
|
{"zhTW", ULMBCS_GRP_TW},
|
|
{"zh", ULMBCS_GRP_CN},
|
|
{NULL, ULMBCS_GRP_L1}
|
|
};
|
|
|
|
|
|
static ulmbcs_byte_t
|
|
FindLMBCSLocale(const char *LocaleID)
|
|
{
|
|
const struct _LocaleLMBCSGrpMap *pTable = LocaleLMBCSGrpMap;
|
|
|
|
if ((!LocaleID) || (!*LocaleID))
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
while (pTable->LocaleID)
|
|
{
|
|
if (*pTable->LocaleID == *LocaleID) /* Check only first char for speed */
|
|
{
|
|
/* First char matches - check whole name, for entry-length */
|
|
if (uprv_strncmp(pTable->LocaleID, LocaleID, strlen(pTable->LocaleID)) == 0)
|
|
return pTable->OptGroup;
|
|
}
|
|
else
|
|
if (*pTable->LocaleID > *LocaleID) /* Sorted alphabetically - exit */
|
|
break;
|
|
pTable++;
|
|
}
|
|
return ULMBCS_GRP_L1;
|
|
}
|
|
|
|
|
|
/*
|
|
Before we get to the main body of code, here's how we hook up to the rest
|
|
of ICU. ICU converters are required to define a structure that includes
|
|
some function pointers, and some common data, in the style of a C++
|
|
vtable. There is also room in there for converter-specific data. LMBCS
|
|
uses that converter-specific data to keep track of the 12 subconverters
|
|
we use, the optimization group, and the group (if any) that matches the
|
|
locale. We have one structure instantiated for each of the 12 possible
|
|
optimization groups. To avoid typos & to avoid boring the reader, we
|
|
put the declarations of these structures and functions into macros. To see
|
|
the definitions of these structures, see unicode\ucnv_bld.h
|
|
*/
|
|
|
|
typedef struct
|
|
{
|
|
UConverterSharedData *OptGrpConverter[ULMBCS_GRP_LAST+1]; /* Converter per Opt. grp. */
|
|
uint8_t OptGroup; /* default Opt. grp. for this LMBCS session */
|
|
uint8_t localeConverterIndex; /* reasonable locale match for index */
|
|
}
|
|
UConverterDataLMBCS;
|
|
|
|
U_CDECL_BEGIN
|
|
static void U_CALLCONV _LMBCSClose(UConverter * _this);
|
|
U_CDECL_END
|
|
|
|
#define DECLARE_LMBCS_DATA(n) \
|
|
static const UConverterImpl _LMBCSImpl##n={\
|
|
UCNV_LMBCS_##n,\
|
|
NULL,NULL,\
|
|
_LMBCSOpen##n,\
|
|
_LMBCSClose,\
|
|
NULL,\
|
|
_LMBCSToUnicodeWithOffsets,\
|
|
_LMBCSToUnicodeWithOffsets,\
|
|
_LMBCSFromUnicode,\
|
|
_LMBCSFromUnicode,\
|
|
NULL,\
|
|
NULL,\
|
|
NULL,\
|
|
NULL,\
|
|
_LMBCSSafeClone,\
|
|
ucnv_getCompleteUnicodeSet,\
|
|
NULL,\
|
|
NULL\
|
|
};\
|
|
static const UConverterStaticData _LMBCSStaticData##n={\
|
|
sizeof(UConverterStaticData),\
|
|
"LMBCS-" #n,\
|
|
0, UCNV_IBM, UCNV_LMBCS_##n, 1, 3,\
|
|
{ 0x3f, 0, 0, 0 },1,FALSE,FALSE,0,0,{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0} \
|
|
};\
|
|
const UConverterSharedData _LMBCSData##n= \
|
|
UCNV_IMMUTABLE_SHARED_DATA_INITIALIZER(&_LMBCSStaticData##n, &_LMBCSImpl##n);
|
|
|
|
/* The only function we needed to duplicate 12 times was the 'open'
|
|
function, which will do basically the same thing except set a different
|
|
optimization group. So, we put the common stuff into a worker function,
|
|
and set up another macro to stamp out the 12 open functions:*/
|
|
#define DEFINE_LMBCS_OPEN(n) \
|
|
static void U_CALLCONV \
|
|
_LMBCSOpen##n(UConverter* _this, UConverterLoadArgs* pArgs, UErrorCode* err) \
|
|
{ _LMBCSOpenWorker(_this, pArgs, err, n); }
|
|
|
|
|
|
|
|
/* Here's the open worker & the common close function */
|
|
static void
|
|
_LMBCSOpenWorker(UConverter* _this,
|
|
UConverterLoadArgs *pArgs,
|
|
UErrorCode* err,
|
|
ulmbcs_byte_t OptGroup)
|
|
{
|
|
UConverterDataLMBCS * extraInfo = (UConverterDataLMBCS*)uprv_malloc (sizeof (UConverterDataLMBCS));
|
|
_this->extraInfo = extraInfo;
|
|
if(extraInfo != NULL)
|
|
{
|
|
UConverterNamePieces stackPieces;
|
|
UConverterLoadArgs stackArgs= UCNV_LOAD_ARGS_INITIALIZER;
|
|
ulmbcs_byte_t i;
|
|
|
|
uprv_memset(extraInfo, 0, sizeof(UConverterDataLMBCS));
|
|
|
|
stackArgs.onlyTestIsLoadable = pArgs->onlyTestIsLoadable;
|
|
|
|
for (i=0; i <= ULMBCS_GRP_LAST && U_SUCCESS(*err); i++)
|
|
{
|
|
if(OptGroupByteToCPName[i] != NULL) {
|
|
extraInfo->OptGrpConverter[i] = ucnv_loadSharedData(OptGroupByteToCPName[i], &stackPieces, &stackArgs, err);
|
|
}
|
|
}
|
|
|
|
if(U_FAILURE(*err) || pArgs->onlyTestIsLoadable) {
|
|
_LMBCSClose(_this);
|
|
return;
|
|
}
|
|
extraInfo->OptGroup = OptGroup;
|
|
extraInfo->localeConverterIndex = FindLMBCSLocale(pArgs->locale);
|
|
}
|
|
else
|
|
{
|
|
*err = U_MEMORY_ALLOCATION_ERROR;
|
|
}
|
|
}
|
|
|
|
U_CDECL_BEGIN
|
|
static void U_CALLCONV
|
|
_LMBCSClose(UConverter * _this)
|
|
{
|
|
if (_this->extraInfo != NULL)
|
|
{
|
|
ulmbcs_byte_t Ix;
|
|
UConverterDataLMBCS * extraInfo = (UConverterDataLMBCS *) _this->extraInfo;
|
|
|
|
for (Ix=0; Ix <= ULMBCS_GRP_LAST; Ix++)
|
|
{
|
|
if (extraInfo->OptGrpConverter[Ix] != NULL)
|
|
ucnv_unloadSharedDataIfReady(extraInfo->OptGrpConverter[Ix]);
|
|
}
|
|
if (!_this->isExtraLocal) {
|
|
uprv_free (_this->extraInfo);
|
|
_this->extraInfo = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
typedef struct LMBCSClone {
|
|
UConverter cnv;
|
|
UConverterDataLMBCS lmbcs;
|
|
} LMBCSClone;
|
|
|
|
static UConverter * U_CALLCONV
|
|
_LMBCSSafeClone(const UConverter *cnv,
|
|
void *stackBuffer,
|
|
int32_t *pBufferSize,
|
|
UErrorCode *status) {
|
|
(void)status;
|
|
LMBCSClone *newLMBCS;
|
|
UConverterDataLMBCS *extraInfo;
|
|
int32_t i;
|
|
|
|
if(*pBufferSize<=0) {
|
|
*pBufferSize=(int32_t)sizeof(LMBCSClone);
|
|
return NULL;
|
|
}
|
|
|
|
extraInfo=(UConverterDataLMBCS *)cnv->extraInfo;
|
|
newLMBCS=(LMBCSClone *)stackBuffer;
|
|
|
|
/* ucnv.c/ucnv_safeClone() copied the main UConverter already */
|
|
|
|
uprv_memcpy(&newLMBCS->lmbcs, extraInfo, sizeof(UConverterDataLMBCS));
|
|
|
|
/* share the subconverters */
|
|
for(i = 0; i <= ULMBCS_GRP_LAST; ++i) {
|
|
if(extraInfo->OptGrpConverter[i] != NULL) {
|
|
ucnv_incrementRefCount(extraInfo->OptGrpConverter[i]);
|
|
}
|
|
}
|
|
|
|
newLMBCS->cnv.extraInfo = &newLMBCS->lmbcs;
|
|
newLMBCS->cnv.isExtraLocal = TRUE;
|
|
return &newLMBCS->cnv;
|
|
}
|
|
|
|
/*
|
|
* There used to be a _LMBCSGetUnicodeSet() function here (up to svn revision 20117)
|
|
* which added all code points except for U+F6xx
|
|
* because those cannot be represented in the Unicode group.
|
|
* However, it turns out that windows-950 has roundtrips for all of U+F6xx
|
|
* which means that LMBCS can convert all Unicode code points after all.
|
|
* We now simply use ucnv_getCompleteUnicodeSet().
|
|
*
|
|
* This may need to be looked at again as Lotus uses _LMBCSGetUnicodeSet(). (091216)
|
|
*/
|
|
|
|
/*
|
|
Here's the basic helper function that we use when converting from
|
|
Unicode to LMBCS, and we suspect that a Unicode character will fit into
|
|
one of the 12 groups. The return value is the number of bytes written
|
|
starting at pStartLMBCS (if any).
|
|
*/
|
|
|
|
static size_t
|
|
LMBCSConversionWorker (
|
|
UConverterDataLMBCS * extraInfo, /* subconverters, opt & locale groups */
|
|
ulmbcs_byte_t group, /* The group to try */
|
|
ulmbcs_byte_t * pStartLMBCS, /* where to put the results */
|
|
UChar * pUniChar, /* The input unicode character */
|
|
ulmbcs_byte_t * lastConverterIndex, /* output: track last successful group used */
|
|
UBool * groups_tried /* output: track any unsuccessful groups */
|
|
)
|
|
{
|
|
ulmbcs_byte_t * pLMBCS = pStartLMBCS;
|
|
UConverterSharedData * xcnv = extraInfo->OptGrpConverter[group];
|
|
|
|
int bytesConverted;
|
|
uint32_t value;
|
|
ulmbcs_byte_t firstByte;
|
|
|
|
U_ASSERT(xcnv);
|
|
U_ASSERT(group<ULMBCS_GRP_UNICODE);
|
|
|
|
bytesConverted = ucnv_MBCSFromUChar32(xcnv, *pUniChar, &value, FALSE);
|
|
|
|
/* get the first result byte */
|
|
if(bytesConverted > 0) {
|
|
firstByte = (ulmbcs_byte_t)(value >> ((bytesConverted - 1) * 8));
|
|
} else {
|
|
/* most common failure mode is an unassigned character */
|
|
groups_tried[group] = TRUE;
|
|
return 0;
|
|
}
|
|
|
|
*lastConverterIndex = group;
|
|
|
|
/* All initial byte values in lower ascii range should have been caught by now,
|
|
except with the exception group.
|
|
*/
|
|
U_ASSERT((firstByte <= ULMBCS_C0END) || (firstByte >= ULMBCS_C1START) || (group == ULMBCS_GRP_EXCEPT));
|
|
|
|
/* use converted data: first write 0, 1 or two group bytes */
|
|
if (group != ULMBCS_GRP_EXCEPT && extraInfo->OptGroup != group)
|
|
{
|
|
*pLMBCS++ = group;
|
|
if (bytesConverted == 1 && group >= ULMBCS_DOUBLEOPTGROUP_START)
|
|
{
|
|
*pLMBCS++ = group;
|
|
}
|
|
}
|
|
|
|
/* don't emit control chars */
|
|
if ( bytesConverted == 1 && firstByte < 0x20 )
|
|
return 0;
|
|
|
|
|
|
/* then move over the converted data */
|
|
switch(bytesConverted)
|
|
{
|
|
case 4:
|
|
*pLMBCS++ = (ulmbcs_byte_t)(value >> 24);
|
|
U_FALLTHROUGH;
|
|
case 3:
|
|
*pLMBCS++ = (ulmbcs_byte_t)(value >> 16);
|
|
U_FALLTHROUGH;
|
|
case 2:
|
|
*pLMBCS++ = (ulmbcs_byte_t)(value >> 8);
|
|
U_FALLTHROUGH;
|
|
case 1:
|
|
*pLMBCS++ = (ulmbcs_byte_t)value;
|
|
U_FALLTHROUGH;
|
|
default:
|
|
/* will never occur */
|
|
break;
|
|
}
|
|
|
|
return (pLMBCS - pStartLMBCS);
|
|
}
|
|
|
|
|
|
/* This is a much simpler version of above, when we
|
|
know we are writing LMBCS using the Unicode group
|
|
*/
|
|
static size_t
|
|
LMBCSConvertUni(ulmbcs_byte_t * pLMBCS, UChar uniChar)
|
|
{
|
|
/* encode into LMBCS Unicode range */
|
|
uint8_t LowCh = (uint8_t)(uniChar & 0x00FF);
|
|
uint8_t HighCh = (uint8_t)(uniChar >> 8);
|
|
|
|
*pLMBCS++ = ULMBCS_GRP_UNICODE;
|
|
|
|
if (LowCh == 0)
|
|
{
|
|
*pLMBCS++ = ULMBCS_UNICOMPATZERO;
|
|
*pLMBCS++ = HighCh;
|
|
}
|
|
else
|
|
{
|
|
*pLMBCS++ = HighCh;
|
|
*pLMBCS++ = LowCh;
|
|
}
|
|
return ULMBCS_UNICODE_SIZE;
|
|
}
|
|
|
|
|
|
|
|
/* The main Unicode to LMBCS conversion function */
|
|
static void U_CALLCONV
|
|
_LMBCSFromUnicode(UConverterFromUnicodeArgs* args,
|
|
UErrorCode* err)
|
|
{
|
|
ulmbcs_byte_t lastConverterIndex = 0;
|
|
UChar uniChar;
|
|
ulmbcs_byte_t LMBCS[ULMBCS_CHARSIZE_MAX];
|
|
ulmbcs_byte_t * pLMBCS;
|
|
int32_t bytes_written;
|
|
UBool groups_tried[ULMBCS_GRP_LAST+1];
|
|
UConverterDataLMBCS * extraInfo = (UConverterDataLMBCS *) args->converter->extraInfo;
|
|
int sourceIndex = 0;
|
|
|
|
/* Basic strategy: attempt to fill in local LMBCS 1-char buffer.(LMBCS)
|
|
If that succeeds, see if it will all fit into the target & copy it over
|
|
if it does.
|
|
|
|
We try conversions in the following order:
|
|
|
|
1. Single-byte ascii & special fixed control chars (&null)
|
|
2. Look up group in table & try that (could be
|
|
A) Unicode group
|
|
B) control group,
|
|
C) national encoding,
|
|
or ambiguous SBCS or MBCS group (on to step 4...)
|
|
|
|
3. If its ambiguous, try this order:
|
|
A) The optimization group
|
|
B) The locale group
|
|
C) The last group that succeeded with this string.
|
|
D) every other group that's relevant (single or double)
|
|
E) If its single-byte ambiguous, try the exceptions group
|
|
|
|
4. And as a grand fallback: Unicode
|
|
*/
|
|
|
|
/*Fix for SPR#DJOE66JFN3 (Lotus)*/
|
|
ulmbcs_byte_t OldConverterIndex = 0;
|
|
|
|
while (args->source < args->sourceLimit && !U_FAILURE(*err))
|
|
{
|
|
/*Fix for SPR#DJOE66JFN3 (Lotus)*/
|
|
OldConverterIndex = extraInfo->localeConverterIndex;
|
|
|
|
if (args->target >= args->targetLimit)
|
|
{
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
break;
|
|
}
|
|
uniChar = *(args->source);
|
|
bytes_written = 0;
|
|
pLMBCS = LMBCS;
|
|
|
|
/* check cases in rough order of how common they are, for speed */
|
|
|
|
/* single byte matches: strategy 1 */
|
|
/*Fix for SPR#DJOE66JFN3 (Lotus)*/
|
|
if((uniChar>=0x80) && (uniChar<=0xff)
|
|
/*Fix for SPR#JUYA6XAERU and TSAO7GL5NK (Lotus)*/ &&(uniChar!=0xB1) &&(uniChar!=0xD7) &&(uniChar!=0xF7)
|
|
&&(uniChar!=0xB0) &&(uniChar!=0xB4) &&(uniChar!=0xB6) &&(uniChar!=0xA7) &&(uniChar!=0xA8))
|
|
{
|
|
extraInfo->localeConverterIndex = ULMBCS_GRP_L1;
|
|
}
|
|
if (((uniChar > ULMBCS_C0END) && (uniChar < ULMBCS_C1START)) ||
|
|
uniChar == 0 || uniChar == ULMBCS_HT || uniChar == ULMBCS_CR ||
|
|
uniChar == ULMBCS_LF || uniChar == ULMBCS_123SYSTEMRANGE
|
|
)
|
|
{
|
|
*pLMBCS++ = (ulmbcs_byte_t ) uniChar;
|
|
bytes_written = 1;
|
|
}
|
|
|
|
|
|
if (!bytes_written)
|
|
{
|
|
/* Check by UNICODE range (Strategy 2) */
|
|
ulmbcs_byte_t group = FindLMBCSUniRange(uniChar);
|
|
|
|
if (group == ULMBCS_GRP_UNICODE) /* (Strategy 2A) */
|
|
{
|
|
pLMBCS += LMBCSConvertUni(pLMBCS,uniChar);
|
|
|
|
bytes_written = (int32_t)(pLMBCS - LMBCS);
|
|
}
|
|
else if (group == ULMBCS_GRP_CTRL) /* (Strategy 2B) */
|
|
{
|
|
/* Handle control characters here */
|
|
if (uniChar <= ULMBCS_C0END)
|
|
{
|
|
*pLMBCS++ = ULMBCS_GRP_CTRL;
|
|
*pLMBCS++ = (ulmbcs_byte_t)(ULMBCS_CTRLOFFSET + uniChar);
|
|
}
|
|
else if (uniChar >= ULMBCS_C1START && uniChar <= ULMBCS_C1START + ULMBCS_CTRLOFFSET)
|
|
{
|
|
*pLMBCS++ = ULMBCS_GRP_CTRL;
|
|
*pLMBCS++ = (ulmbcs_byte_t ) (uniChar & 0x00FF);
|
|
}
|
|
bytes_written = (int32_t)(pLMBCS - LMBCS);
|
|
}
|
|
else if (group < ULMBCS_GRP_UNICODE) /* (Strategy 2C) */
|
|
{
|
|
/* a specific converter has been identified - use it */
|
|
bytes_written = (int32_t)LMBCSConversionWorker (
|
|
extraInfo, group, pLMBCS, &uniChar,
|
|
&lastConverterIndex, groups_tried);
|
|
}
|
|
if (!bytes_written) /* the ambiguous group cases (Strategy 3) */
|
|
{
|
|
uprv_memset(groups_tried, 0, sizeof(groups_tried));
|
|
|
|
/* check for non-default optimization group (Strategy 3A )*/
|
|
if ((extraInfo->OptGroup != 1) && (ULMBCS_AMBIGUOUS_MATCH(group, extraInfo->OptGroup)))
|
|
{
|
|
/*zhujin: upgrade, merge #39299 here (Lotus) */
|
|
/*To make R5 compatible translation, look for exceptional group first for non-DBCS*/
|
|
|
|
if(extraInfo->localeConverterIndex < ULMBCS_DOUBLEOPTGROUP_START)
|
|
{
|
|
bytes_written = (int32_t)LMBCSConversionWorker (extraInfo,
|
|
ULMBCS_GRP_L1, pLMBCS, &uniChar,
|
|
&lastConverterIndex, groups_tried);
|
|
|
|
if(!bytes_written)
|
|
{
|
|
bytes_written = (int32_t)LMBCSConversionWorker (extraInfo,
|
|
ULMBCS_GRP_EXCEPT, pLMBCS, &uniChar,
|
|
&lastConverterIndex, groups_tried);
|
|
}
|
|
if(!bytes_written)
|
|
{
|
|
bytes_written = (int32_t)LMBCSConversionWorker (extraInfo,
|
|
extraInfo->localeConverterIndex, pLMBCS, &uniChar,
|
|
&lastConverterIndex, groups_tried);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
bytes_written = (int32_t)LMBCSConversionWorker (extraInfo,
|
|
extraInfo->localeConverterIndex, pLMBCS, &uniChar,
|
|
&lastConverterIndex, groups_tried);
|
|
}
|
|
}
|
|
/* check for locale optimization group (Strategy 3B) */
|
|
if (!bytes_written && (extraInfo->localeConverterIndex) && (ULMBCS_AMBIGUOUS_MATCH(group, extraInfo->localeConverterIndex)))
|
|
{
|
|
bytes_written = (int32_t)LMBCSConversionWorker (extraInfo,
|
|
extraInfo->localeConverterIndex, pLMBCS, &uniChar, &lastConverterIndex, groups_tried);
|
|
}
|
|
/* check for last optimization group used for this string (Strategy 3C) */
|
|
if (!bytes_written && (lastConverterIndex) && (ULMBCS_AMBIGUOUS_MATCH(group, lastConverterIndex)))
|
|
{
|
|
bytes_written = (int32_t)LMBCSConversionWorker (extraInfo,
|
|
lastConverterIndex, pLMBCS, &uniChar, &lastConverterIndex, groups_tried);
|
|
}
|
|
if (!bytes_written)
|
|
{
|
|
/* just check every possible matching converter (Strategy 3D) */
|
|
ulmbcs_byte_t grp_start;
|
|
ulmbcs_byte_t grp_end;
|
|
ulmbcs_byte_t grp_ix;
|
|
grp_start = (ulmbcs_byte_t)((group == ULMBCS_AMBIGUOUS_MBCS)
|
|
? ULMBCS_DOUBLEOPTGROUP_START
|
|
: ULMBCS_GRP_L1);
|
|
grp_end = (ulmbcs_byte_t)((group == ULMBCS_AMBIGUOUS_MBCS)
|
|
? ULMBCS_GRP_LAST
|
|
: ULMBCS_GRP_TH);
|
|
if(group == ULMBCS_AMBIGUOUS_ALL)
|
|
{
|
|
grp_start = ULMBCS_GRP_L1;
|
|
grp_end = ULMBCS_GRP_LAST;
|
|
}
|
|
for (grp_ix = grp_start;
|
|
grp_ix <= grp_end && !bytes_written;
|
|
grp_ix++)
|
|
{
|
|
if (extraInfo->OptGrpConverter [grp_ix] && !groups_tried [grp_ix])
|
|
{
|
|
bytes_written = (int32_t)LMBCSConversionWorker (extraInfo,
|
|
grp_ix, pLMBCS, &uniChar,
|
|
&lastConverterIndex, groups_tried);
|
|
}
|
|
}
|
|
/* a final conversion fallback to the exceptions group if its likely
|
|
to be single byte (Strategy 3E) */
|
|
if (!bytes_written && grp_start == ULMBCS_GRP_L1)
|
|
{
|
|
bytes_written = (int32_t)LMBCSConversionWorker (extraInfo,
|
|
ULMBCS_GRP_EXCEPT, pLMBCS, &uniChar,
|
|
&lastConverterIndex, groups_tried);
|
|
}
|
|
}
|
|
/* all of our other strategies failed. Fallback to Unicode. (Strategy 4)*/
|
|
if (!bytes_written)
|
|
{
|
|
|
|
pLMBCS += LMBCSConvertUni(pLMBCS, uniChar);
|
|
bytes_written = (int32_t)(pLMBCS - LMBCS);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* we have a translation. increment source and write as much as possible to target */
|
|
args->source++;
|
|
pLMBCS = LMBCS;
|
|
while (args->target < args->targetLimit && bytes_written--)
|
|
{
|
|
*(args->target)++ = *pLMBCS++;
|
|
if (args->offsets)
|
|
{
|
|
*(args->offsets)++ = sourceIndex;
|
|
}
|
|
}
|
|
sourceIndex++;
|
|
if (bytes_written > 0)
|
|
{
|
|
/* write any bytes that didn't fit in target to the error buffer,
|
|
common code will move this to target if we get called back with
|
|
enough target room
|
|
*/
|
|
uint8_t * pErrorBuffer = args->converter->charErrorBuffer;
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
args->converter->charErrorBufferLength = (int8_t)bytes_written;
|
|
while (bytes_written--)
|
|
{
|
|
*pErrorBuffer++ = *pLMBCS++;
|
|
}
|
|
}
|
|
/*Fix for SPR#DJOE66JFN3 (Lotus)*/
|
|
extraInfo->localeConverterIndex = OldConverterIndex;
|
|
}
|
|
}
|
|
|
|
|
|
/* Now, the Unicode from LMBCS section */
|
|
|
|
|
|
/* A function to call when we are looking at the Unicode group byte in LMBCS */
|
|
static UChar
|
|
GetUniFromLMBCSUni(char const ** ppLMBCSin) /* Called with LMBCS-style Unicode byte stream */
|
|
{
|
|
uint8_t HighCh = *(*ppLMBCSin)++; /* Big-endian Unicode in LMBCS compatibility group*/
|
|
uint8_t LowCh = *(*ppLMBCSin)++;
|
|
|
|
if (HighCh == ULMBCS_UNICOMPATZERO )
|
|
{
|
|
HighCh = LowCh;
|
|
LowCh = 0; /* zero-byte in LSB special character */
|
|
}
|
|
return (UChar)((HighCh << 8) | LowCh);
|
|
}
|
|
|
|
|
|
|
|
/* CHECK_SOURCE_LIMIT: Helper macro to verify that there are at least'index'
|
|
bytes left in source up to sourceLimit.Errors appropriately if not.
|
|
If we reach the limit, then update the source pointer to there to consume
|
|
all input as required by ICU converter semantics.
|
|
*/
|
|
|
|
#define CHECK_SOURCE_LIMIT(index) UPRV_BLOCK_MACRO_BEGIN { \
|
|
if (args->source+index > args->sourceLimit) { \
|
|
*err = U_TRUNCATED_CHAR_FOUND; \
|
|
args->source = args->sourceLimit; \
|
|
return 0xffff; \
|
|
} \
|
|
} UPRV_BLOCK_MACRO_END
|
|
|
|
/* Return the Unicode representation for the current LMBCS character */
|
|
|
|
static UChar32 U_CALLCONV
|
|
_LMBCSGetNextUCharWorker(UConverterToUnicodeArgs* args,
|
|
UErrorCode* err)
|
|
{
|
|
UChar32 uniChar = 0; /* an output UNICODE char */
|
|
ulmbcs_byte_t CurByte; /* A byte from the input stream */
|
|
|
|
/* error check */
|
|
if (args->source >= args->sourceLimit)
|
|
{
|
|
*err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return 0xffff;
|
|
}
|
|
/* Grab first byte & save address for error recovery */
|
|
CurByte = *((ulmbcs_byte_t *) (args->source++));
|
|
|
|
/*
|
|
* at entry of each if clause:
|
|
* 1. 'CurByte' points at the first byte of a LMBCS character
|
|
* 2. '*source'points to the next byte of the source stream after 'CurByte'
|
|
*
|
|
* the job of each if clause is:
|
|
* 1. set '*source' to point at the beginning of next char (nop if LMBCS char is only 1 byte)
|
|
* 2. set 'uniChar' up with the right Unicode value, or set 'err' appropriately
|
|
*/
|
|
|
|
/* First lets check the simple fixed values. */
|
|
|
|
if(((CurByte > ULMBCS_C0END) && (CurByte < ULMBCS_C1START)) /* ascii range */
|
|
|| (CurByte == 0)
|
|
|| CurByte == ULMBCS_HT || CurByte == ULMBCS_CR
|
|
|| CurByte == ULMBCS_LF || CurByte == ULMBCS_123SYSTEMRANGE)
|
|
{
|
|
uniChar = CurByte;
|
|
}
|
|
else
|
|
{
|
|
UConverterDataLMBCS * extraInfo;
|
|
ulmbcs_byte_t group;
|
|
UConverterSharedData *cnv;
|
|
|
|
if (CurByte == ULMBCS_GRP_CTRL) /* Control character group - no opt group update */
|
|
{
|
|
ulmbcs_byte_t C0C1byte;
|
|
CHECK_SOURCE_LIMIT(1);
|
|
C0C1byte = *(args->source)++;
|
|
uniChar = (C0C1byte < ULMBCS_C1START) ? C0C1byte - ULMBCS_CTRLOFFSET : C0C1byte;
|
|
}
|
|
else
|
|
if (CurByte == ULMBCS_GRP_UNICODE) /* Unicode compatibility group: BigEndian UTF16 */
|
|
{
|
|
CHECK_SOURCE_LIMIT(2);
|
|
|
|
/* don't check for error indicators fffe/ffff below */
|
|
return GetUniFromLMBCSUni(&(args->source));
|
|
}
|
|
else if (CurByte <= ULMBCS_CTRLOFFSET)
|
|
{
|
|
group = CurByte; /* group byte is in the source */
|
|
extraInfo = (UConverterDataLMBCS *) args->converter->extraInfo;
|
|
if (group > ULMBCS_GRP_LAST || (cnv = extraInfo->OptGrpConverter[group]) == NULL)
|
|
{
|
|
/* this is not a valid group byte - no converter*/
|
|
*err = U_INVALID_CHAR_FOUND;
|
|
}
|
|
else if (group >= ULMBCS_DOUBLEOPTGROUP_START) /* double byte conversion */
|
|
{
|
|
|
|
CHECK_SOURCE_LIMIT(2);
|
|
|
|
/* check for LMBCS doubled-group-byte case */
|
|
if (*args->source == group) {
|
|
/* single byte */
|
|
++args->source;
|
|
uniChar = ucnv_MBCSSimpleGetNextUChar(cnv, args->source, 1, FALSE);
|
|
++args->source;
|
|
} else {
|
|
/* double byte */
|
|
uniChar = ucnv_MBCSSimpleGetNextUChar(cnv, args->source, 2, FALSE);
|
|
args->source += 2;
|
|
}
|
|
}
|
|
else { /* single byte conversion */
|
|
CHECK_SOURCE_LIMIT(1);
|
|
CurByte = *(args->source)++;
|
|
|
|
if (CurByte >= ULMBCS_C1START)
|
|
{
|
|
uniChar = _MBCS_SINGLE_SIMPLE_GET_NEXT_BMP(cnv, CurByte);
|
|
}
|
|
else
|
|
{
|
|
/* The non-optimizable oddballs where there is an explicit byte
|
|
* AND the second byte is not in the upper ascii range
|
|
*/
|
|
char bytes[2];
|
|
|
|
extraInfo = (UConverterDataLMBCS *) args->converter->extraInfo;
|
|
cnv = extraInfo->OptGrpConverter [ULMBCS_GRP_EXCEPT];
|
|
|
|
/* Lookup value must include opt group */
|
|
bytes[0] = group;
|
|
bytes[1] = CurByte;
|
|
uniChar = ucnv_MBCSSimpleGetNextUChar(cnv, bytes, 2, FALSE);
|
|
}
|
|
}
|
|
}
|
|
else if (CurByte >= ULMBCS_C1START) /* group byte is implicit */
|
|
{
|
|
extraInfo = (UConverterDataLMBCS *) args->converter->extraInfo;
|
|
group = extraInfo->OptGroup;
|
|
cnv = extraInfo->OptGrpConverter[group];
|
|
if (group >= ULMBCS_DOUBLEOPTGROUP_START) /* double byte conversion */
|
|
{
|
|
if (!ucnv_MBCSIsLeadByte(cnv, CurByte))
|
|
{
|
|
CHECK_SOURCE_LIMIT(0);
|
|
|
|
/* let the MBCS conversion consume CurByte again */
|
|
uniChar = ucnv_MBCSSimpleGetNextUChar(cnv, args->source - 1, 1, FALSE);
|
|
}
|
|
else
|
|
{
|
|
CHECK_SOURCE_LIMIT(1);
|
|
/* let the MBCS conversion consume CurByte again */
|
|
uniChar = ucnv_MBCSSimpleGetNextUChar(cnv, args->source - 1, 2, FALSE);
|
|
++args->source;
|
|
}
|
|
}
|
|
else /* single byte conversion */
|
|
{
|
|
uniChar = _MBCS_SINGLE_SIMPLE_GET_NEXT_BMP(cnv, CurByte);
|
|
}
|
|
}
|
|
}
|
|
return uniChar;
|
|
}
|
|
|
|
|
|
/* The exported function that converts lmbcs to one or more
|
|
UChars - currently UTF-16
|
|
*/
|
|
static void U_CALLCONV
|
|
_LMBCSToUnicodeWithOffsets(UConverterToUnicodeArgs* args,
|
|
UErrorCode* err)
|
|
{
|
|
char LMBCS [ULMBCS_CHARSIZE_MAX];
|
|
UChar uniChar; /* one output UNICODE char */
|
|
const char * saveSource; /* beginning of current code point */
|
|
const char * pStartLMBCS = args->source; /* beginning of whole string */
|
|
const char * errSource = NULL; /* pointer to actual input in case an error occurs */
|
|
int8_t savebytes = 0;
|
|
|
|
/* Process from source to limit, or until error */
|
|
while (U_SUCCESS(*err) && args->sourceLimit > args->source && args->targetLimit > args->target)
|
|
{
|
|
saveSource = args->source; /* beginning of current code point */
|
|
|
|
if (args->converter->toULength) /* reassemble char from previous call */
|
|
{
|
|
const char *saveSourceLimit;
|
|
size_t size_old = args->converter->toULength;
|
|
|
|
/* limit from source is either remainder of temp buffer, or user limit on source */
|
|
size_t size_new_maybe_1 = sizeof(LMBCS) - size_old;
|
|
size_t size_new_maybe_2 = args->sourceLimit - args->source;
|
|
size_t size_new = (size_new_maybe_1 < size_new_maybe_2) ? size_new_maybe_1 : size_new_maybe_2;
|
|
|
|
|
|
uprv_memcpy(LMBCS, args->converter->toUBytes, size_old);
|
|
uprv_memcpy(LMBCS + size_old, args->source, size_new);
|
|
saveSourceLimit = args->sourceLimit;
|
|
args->source = errSource = LMBCS;
|
|
args->sourceLimit = LMBCS+size_old+size_new;
|
|
savebytes = (int8_t)(size_old+size_new);
|
|
uniChar = (UChar) _LMBCSGetNextUCharWorker(args, err);
|
|
args->source = saveSource + ((args->source - LMBCS) - size_old);
|
|
args->sourceLimit = saveSourceLimit;
|
|
|
|
if (*err == U_TRUNCATED_CHAR_FOUND)
|
|
{
|
|
/* evil special case: source buffers so small a char spans more than 2 buffers */
|
|
args->converter->toULength = savebytes;
|
|
uprv_memcpy(args->converter->toUBytes, LMBCS, savebytes);
|
|
args->source = args->sourceLimit;
|
|
*err = U_ZERO_ERROR;
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
/* clear the partial-char marker */
|
|
args->converter->toULength = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
errSource = saveSource;
|
|
uniChar = (UChar) _LMBCSGetNextUCharWorker(args, err);
|
|
savebytes = (int8_t)(args->source - saveSource);
|
|
}
|
|
if (U_SUCCESS(*err))
|
|
{
|
|
if (uniChar < 0xfffe)
|
|
{
|
|
*(args->target)++ = uniChar;
|
|
if(args->offsets)
|
|
{
|
|
*(args->offsets)++ = (int32_t)(saveSource - pStartLMBCS);
|
|
}
|
|
}
|
|
else if (uniChar == 0xfffe)
|
|
{
|
|
*err = U_INVALID_CHAR_FOUND;
|
|
}
|
|
else /* if (uniChar == 0xffff) */
|
|
{
|
|
*err = U_ILLEGAL_CHAR_FOUND;
|
|
}
|
|
}
|
|
}
|
|
/* if target ran out before source, return U_BUFFER_OVERFLOW_ERROR */
|
|
if (U_SUCCESS(*err) && args->sourceLimit > args->source && args->targetLimit <= args->target)
|
|
{
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
}
|
|
else if (U_FAILURE(*err))
|
|
{
|
|
/* If character incomplete or unmappable/illegal, store it in toUBytes[] */
|
|
args->converter->toULength = savebytes;
|
|
if (savebytes > 0) {
|
|
uprv_memcpy(args->converter->toUBytes, errSource, savebytes);
|
|
}
|
|
if (*err == U_TRUNCATED_CHAR_FOUND) {
|
|
*err = U_ZERO_ERROR;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* And now, the macroized declarations of data & functions: */
|
|
DEFINE_LMBCS_OPEN(1)
|
|
DEFINE_LMBCS_OPEN(2)
|
|
DEFINE_LMBCS_OPEN(3)
|
|
DEFINE_LMBCS_OPEN(4)
|
|
DEFINE_LMBCS_OPEN(5)
|
|
DEFINE_LMBCS_OPEN(6)
|
|
DEFINE_LMBCS_OPEN(8)
|
|
DEFINE_LMBCS_OPEN(11)
|
|
DEFINE_LMBCS_OPEN(16)
|
|
DEFINE_LMBCS_OPEN(17)
|
|
DEFINE_LMBCS_OPEN(18)
|
|
DEFINE_LMBCS_OPEN(19)
|
|
|
|
|
|
DECLARE_LMBCS_DATA(1)
|
|
DECLARE_LMBCS_DATA(2)
|
|
DECLARE_LMBCS_DATA(3)
|
|
DECLARE_LMBCS_DATA(4)
|
|
DECLARE_LMBCS_DATA(5)
|
|
DECLARE_LMBCS_DATA(6)
|
|
DECLARE_LMBCS_DATA(8)
|
|
DECLARE_LMBCS_DATA(11)
|
|
DECLARE_LMBCS_DATA(16)
|
|
DECLARE_LMBCS_DATA(17)
|
|
DECLARE_LMBCS_DATA(18)
|
|
DECLARE_LMBCS_DATA(19)
|
|
|
|
U_CDECL_END
|
|
|
|
#endif /* #if !UCONFIG_NO_LEGACY_CONVERSION */
|