| /* |
| ********************************************************************** |
| * Copyright (C) 2000-2009, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| ********************************************************************** |
| * file name: ucnv_lmb.cpp |
| * encoding: US-ASCII |
| * 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 |
| |
| #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 |
| |
| #define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0])) |
| |
| /* |
| 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 chjaracter 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 eqivalents 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 chaarcter 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 intrepreted 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; |
| |
| static void _LMBCSClose(UConverter * _this); |
| |
| #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\ |
| };\ |
| 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={\ |
| sizeof(UConverterSharedData), ~((uint32_t) 0),\ |
| NULL, NULL, &_LMBCSStaticData##n, FALSE, &_LMBCSImpl##n, \ |
| 0 \ |
| }; |
| |
| /* 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 \ |
| _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 = _this->extraInfo = |
| (UConverterDataLMBCS*)uprv_malloc (sizeof (UConverterDataLMBCS)); |
| if(extraInfo != NULL) |
| { |
| UConverterNamePieces stackPieces; |
| UConverterLoadArgs stackArgs={ (int32_t)sizeof(UConverterLoadArgs) }; |
| 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; |
| } |
| } |
| |
| static void |
| _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 * |
| _LMBCSSafeClone(const UConverter *cnv, |
| void *stackBuffer, |
| int32_t *pBufferSize, |
| UErrorCode *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); |
| case 3: |
| *pLMBCS++ = (ulmbcs_byte_t)(value >> 16); |
| case 2: |
| *pLMBCS++ = (ulmbcs_byte_t)(value >> 8); |
| case 1: |
| *pLMBCS++ = (ulmbcs_byte_t)value; |
| 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 |
| _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 relevent (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 = LMBCSConversionWorker (extraInfo, |
| ULMBCS_GRP_L1, pLMBCS, &uniChar, |
| &lastConverterIndex, groups_tried); |
| |
| if(!bytes_written) |
| { |
| bytes_written = LMBCSConversionWorker (extraInfo, |
| ULMBCS_GRP_EXCEPT, pLMBCS, &uniChar, |
| &lastConverterIndex, groups_tried); |
| } |
| if(!bytes_written) |
| { |
| bytes_written = LMBCSConversionWorker (extraInfo, |
| extraInfo->localeConverterIndex, pLMBCS, &uniChar, |
| &lastConverterIndex, groups_tried); |
| } |
| } |
| else |
| { |
| bytes_written = 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 posible 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) \ |
| if (args->source+index > args->sourceLimit){\ |
| *err = U_TRUNCATED_CHAR_FOUND;\ |
| args->source = args->sourceLimit;\ |
| return 0xffff;} |
| |
| /* Return the Unicode representation for the current LMBCS character */ |
| |
| static UChar32 |
| _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 |
| _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) |
| |
| #endif /* #if !UCONFIG_NO_LEGACY_CONVERSION */ |