--- /dev/null
+// © 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 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;
+
+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 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 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 */
projects / apple / icu.git / blobdiff