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951a05c42d
firebird-mirror/src/jrd/intl.cpp
robocop 441817bd82 1.- Misc changes 
2.- Style
3.- Recover dsc_ttype in dsc after Blas' cleanup as a synonym for dsc_sub_type in text types
2004-05-21 06:16:17 +00:00

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/************* history ************
*
* COMPONENT: JRD MODULE: INTL.CPP
* generated by Marion V2.5 2/6/90
* from dev db on 4-JAN-1995
*****************************************************************
*
* PR 2002-06-02 Added ugly c hack in
* intl_back_compat_alloc_func_lookup.
* When someone has time we need to change the references to
* return (void*) function to something more C++ like
*
* 42 4711 3 11 17 tamlin 2001
* Added silly numbers before my name, and converted it to C++.
*
* 18850 daves 4-JAN-1995
* Fix gds__alloc usage
*
* 18837 deej 31-DEC-1994
* fixing up HARBOR_MERGE
*
* 18821 deej 27-DEC-1994
* HARBOR MERGE
*
* 18789 jdavid 19-DEC-1994
* Cast some functions
*
* 17508 jdavid 15-JUL-1994
* Bring it up to date
*
* 17500 daves 13-JUL-1994
* Bug 6645: Different calculation of partial keys
*
* 17202 katz 24-MAY-1994
* PC_PLATFORM requires the .dll extension
*
* 17191 katz 23-MAY-1994
* OS/2 requires the .dll extension
*
* 17180 katz 23-MAY-1994
* Define location of DLL on OS/2
*
* 17149 katz 20-MAY-1994
* In JRD, isc_arg_number arguments are SLONG's not int's
*
* 16633 daves 19-APR-1994
* Bug 6202: International licensing uses INTERNATIONAL product code
*
* 16555 katz 17-APR-1994
* The last argument of calls to ERR_post should be 0
*
* 16521 katz 14-APR-1994
* Borland C needs a decorated symbol to lookup
*
* 16403 daves 8-APR-1994
* Bug 6441: Emit an error whenever transliteration from ttype_binary attempted
*
* 16141 katz 28-MAR-1994
* Don't declare return value from ISC_lookup_entrypoint as API_ROUTINE
*
* The contents of this file are subject to the Interbase Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy
* of the License at http://www.Inprise.com/IPL.html
*
* Software distributed under the License is distributed on an
* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
* or implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code was created by Inprise Corporation
* and its predecessors. Portions created by Inprise Corporation are
* Copyright (C) Inprise Corporation.
*
* All Rights Reserved.
* Contributor(s): ______________________________________.
*
* 2002.10.29 Sean Leyne - Removed obsolete "Netware" port
*
* 2002.10.30 Sean Leyne - Removed support for obsolete "PC_PLATFORM" define
*
*/
/*
* PROGRAM: JRD Intl
* MODULE: intl.cpp
* DESCRIPTION: International text support routines
*
* copyright (c) 1992, 1993 by Borland International
*/
#include "firebird.h"
#include <string.h>
#include "../jrd/common.h"
#include <stdio.h>
#include "../jrd/jrd.h"
#include "../jrd/req.h"
#include "../jrd/val.h"
#include "gen/iberror.h"
#include "../jrd/intl.h"
#include "../jrd/intl_classes.h"
#include "../jrd/ods.h"
#include "../jrd/btr.h"
#include "../intl/charsets.h"
#include "../intl/country_codes.h"
#include "../jrd/gdsassert.h"
#include "../jrd/license.h"
#ifdef INTL_BUILTIN
#include "../intl/ld_proto.h"
#endif
#include "../jrd/all_proto.h"
#include "../jrd/cvt_proto.h"
#include "../jrd/err_proto.h"
#include "../jrd/evl_proto.h"
#include "../jrd/fun_proto.h"
#include "../jrd/gds_proto.h"
#include "../jrd/iberr_proto.h"
#include "../jrd/intl_proto.h"
#include "../jrd/isc_proto.h"
#include "../jrd/thd_proto.h"
#include "../jrd/evl_string.h"
#include "../common/classes/init.h"
#include "../jrd/plugin_manager.h"
using namespace Jrd;
#ifdef DEV_BUILD
#define isprintable(x) ((((unsigned char)(x)) & 0x7F) >= ' ')
#ifdef DEBUG_INTL
#define INTL_TRACE(args) gds__log args
#else
#define INTL_TRACE(args)
#endif
#else
#define INTL_TRACE(args)
#endif
#define IS_TEXT(x) (((x)->dsc_dtype == dtype_text) ||\
((x)->dsc_dtype == dtype_varying)||\
((x)->dsc_dtype == dtype_cstring))
#define TTYPE_TO_CHARSET(tt) ((SSHORT)((tt) & 0x00FF))
#define TTYPE_TO_COLLATION(tt) ((SSHORT)((tt) >> 8))
typedef unsigned char FILECHAR;
static bool all_spaces(thread_db*, CHARSET_ID, const BYTE*, USHORT, USHORT);
static void pad_spaces(thread_db*, CHARSET_ID, BYTE *, USHORT);
static FPTR_SHORT lookup_init_function(USHORT, SSHORT, SSHORT);
static void finish_texttype_init(TEXTTYPE);
static USHORT nc_to_wc(TEXTTYPE, UCS2_CHAR*, USHORT, const UCHAR*, USHORT,
SSHORT*, USHORT*);
static USHORT wc_to_wc(TEXTTYPE, UCS2_CHAR*, USHORT, const UCS2_CHAR*, USHORT,
SSHORT*, USHORT*);
/* Name of module that implements text-type (n) */
#ifdef VMS
/* Note: MUST be only the file name. The VMS lib$find_shared_image
* call insists on file name only, not any "path" components.
*/
const char* INTL_MODULE1 = "FBINTL";
const char* INTL_MODULE2 = "FBINTL2";
#elif defined (WIN_NT)
/* prefixed with $INTERBASE */
const char* INTL_MODULE1 = "fbintl.dll";
const char* INTL_MODULE2 = "fbintl2.dll";
#else
/* prefixed with $INTERBASE */
const char* INTL_MODULE1 = "fbintl";
const char* INTL_MODULE2 = "fbintl2";
#endif
const char* INTL_LOOKUP_ENTRY1 = "LD_lookup";
const char* INTL_LOOKUP_ENTRY2 = "LD2_lookup";
const char* INTL_USER_ENTRY = "USER_TEXTTYPE_%03d";
// We need all the structure definitions from the old interface
#define INTL_ENGINE_INTERNAL
#include "../jrd/intlobj.h"
// storage for the loadable modules
namespace {
Firebird::InitInstance<PluginManager> intlBCPlugins;
}
static bool bcLoaded = false;
static const char *INTL_PLUGIN_DIR = "intl";
class CharsetIDGetter
{
public:
static CHARSET_ID generate(const void *sender, const CsConvert& Item) {
return Item.getToCS();
}
};
// Classes and structures used internally to this file and intl implementation
class CharSetContainer
{
public:
CharSetContainer(MemoryPool& p, USHORT cs_id);
CharSet getCharSet() { return cs; }
TextType lookupCollation(thread_db* tdbb, USHORT tt_id);
CsConvert lookupConverter(thread_db* tdbb, CHARSET_ID to_cs);
static CharSetContainer* lookupCharset(thread_db* tdbb, SSHORT ttype, ISC_STATUS *status);
private:
Firebird::SortedArray<CsConvert, Firebird::EmptyStorage<CsConvert>,
CHARSET_ID, CharsetIDGetter> charset_converters;
Firebird::Array<TextType> charset_collations;
Firebird::SortedArray<CHARSET_ID> impossible_conversions;
CharSet cs;
};
CharSetContainer* CharSetContainer::lookupCharset(thread_db* tdbb, SSHORT ttype, ISC_STATUS *status)
{
/**************************************
*
* l o o k u p C h a r s e t
*
**************************************
*
* Functional description
*
* Lookup a character set descriptor.
*
* First, search the appropriate vector that hangs
* off the dbb. If not found, then call the lower
* level lookup routine to allocate it, or return
* null if we don't know about the charset.
*
* Returns:
* *charset - if no errors;
* <never> - if error & err non NULL
* NULL - if error & err NULL
*
**************************************/
CharSetContainer *cs = NULL;
SET_TDBB(tdbb);
Database* dbb = tdbb->tdbb_database;
USHORT id = TTYPE_TO_CHARSET(ttype);
if (id == CS_dynamic)
id = tdbb->tdbb_attachment->att_charset;
if (id >= dbb->dbb_charsets.size())
dbb->dbb_charsets.resize(id + 10);
else
cs = dbb->dbb_charsets[id];
// allocate a new character set object if we couldn't find one.
if (!cs) {
cs = FB_NEW(*dbb->dbb_permanent) CharSetContainer(*dbb->dbb_permanent, id);
if (cs->getCharSet() == NULL) {
delete cs;
return NULL;
}
dbb->dbb_charsets[id] = cs;
}
fb_assert(cs != NULL);
return cs;
}
CharSetContainer::CharSetContainer(MemoryPool& p, USHORT cs_id) :
charset_converters(p),
charset_collations(p),
impossible_conversions(p),
cs(NULL)
{
typedef USHORT (*CSInitFunc)(charset*, SSHORT, SSHORT);
CSInitFunc csInitFunc =
reinterpret_cast<CSInitFunc>(lookup_init_function(type_charset, cs_id, 0));
charset* csL = FB_NEW(p) charset;
memset(csL, 0, sizeof(charset));
if (!csInitFunc || (*csInitFunc)(csL, cs_id, 0) != 0)
{
delete csL;
csL = NULL;
}
this->cs = csL;
}
CsConvert CharSetContainer::lookupConverter(thread_db* tdbb, CHARSET_ID to_cs)
{
int pos;
if (charset_converters.find(to_cs, pos))
return charset_converters[pos];
if (impossible_conversions.find(to_cs, pos))
return NULL;
if (to_cs == CS_UNICODE_UCS2) {
return cs.getConvToUnicode();
}
if (cs.getId() == CS_UNICODE_UCS2) {
CharSet to_charset = INTL_charset_lookup(tdbb, to_cs, NULL);
if (to_charset == NULL)
return NULL;
return to_charset.getConvFromUnicode();
}
typedef USHORT (*CVTInitFunc)(csconvert*, SSHORT, SSHORT);
CVTInitFunc cvtInitFunc =
reinterpret_cast<CVTInitFunc>(lookup_init_function(type_csconvert, to_cs, cs.getId()));
if (!cvtInitFunc) {
impossible_conversions.add(to_cs);
return NULL;
}
csconvert* cvt = FB_NEW(*tdbb->tdbb_database->dbb_permanent) csconvert;
memset(cvt, 0, sizeof(csconvert));
if ((*cvtInitFunc)(cvt, to_cs, cs.getId()) != 0)
{
impossible_conversions.add(to_cs);
delete cvt;
return NULL;
}
CsConvert converter = cvt;
fb_assert(converter.getFromCS() == cs.getId());
fb_assert(converter.getToCS() == to_cs);
charset_converters.add(converter);
return cvt;
}
TextType CharSetContainer::lookupCollation(thread_db* tdbb, USHORT tt_id)
{
const USHORT id = TTYPE_TO_COLLATION(tt_id);
if (id < charset_collations.getCount() && charset_collations[id] != NULL)
return charset_collations[id];
typedef USHORT (*TTInitFunc)(TEXTTYPE, SSHORT, SSHORT);
TTInitFunc ttInitFunc =
reinterpret_cast<TTInitFunc>(lookup_init_function(type_texttype, tt_id, 0));
if (!ttInitFunc)
return NULL;
TEXTTYPE tt = FB_NEW(*tdbb->tdbb_database->dbb_permanent) texttype;
memset(tt, 0, sizeof(texttype));
if ((*ttInitFunc)(tt, tt_id, 0) != 0)
{
delete tt;
return NULL;
}
finish_texttype_init(tt);
if (charset_collations.getCount() <= id)
charset_collations.grow(id+1);
charset_collations[id] = tt;
return tt;
}
/* Below are templates for functions used in TextType implementation */
class MBStrConverter {
public:
MBStrConverter(thread_db* tdbb, TextType obj, const UCHAR* &str, SSHORT &len) {
SSHORT err_code;
USHORT err_pos;
SSHORT out_len = obj.to_wc(NULL, 0, str, len, &err_code, &err_pos);
if (out_len > (int) sizeof(tempBuffer))
out_str = FB_NEW(*tdbb->tdbb_default) UCS2_CHAR[out_len/2];
else
out_str = tempBuffer;
len = obj.to_wc(out_str, out_len, str, len, &err_code, &err_pos);
str = reinterpret_cast<UCHAR*>(out_str);
}
~MBStrConverter() {
if (out_str != tempBuffer)
delete[] out_str;
}
private:
UCS2_CHAR tempBuffer[100], *out_str;
};
class NullStrConverter {
public:
NullStrConverter(thread_db* tdbb, TextType obj, const UCHAR *str, SSHORT len) { }
};
template <typename PrevConverter>
class UpcaseConverter : public PrevConverter {
public:
UpcaseConverter(thread_db* tdbb, TextType obj, const UCHAR* &str, SSHORT &len) :
PrevConverter(tdbb, obj, str, len)
{
if (len > (int) sizeof(tempBuffer))
out_str = FB_NEW(*tdbb->tdbb_default) UCHAR[len];
else
out_str = tempBuffer;
obj.str_to_upper(len, str, len, out_str);
str = out_str;
}
~UpcaseConverter() {
if (out_str != tempBuffer)
delete[] out_str;
}
private:
UCHAR tempBuffer[100], *out_str;
};
template <typename StrConverter, typename CharType>
class ContainsObjectImpl : public ContainsObject
{
public:
ContainsObjectImpl(MemoryPool& pool, const CharType* str, SSHORT str_len)
: evaluator(pool, str, str_len)
{ }
void reset() { evaluator.reset(); }
bool result() { return evaluator.getResult(); };
bool process(thread_db* tdbb, Jrd::TextType ttype, const UCHAR* str, SSHORT length) {
StrConverter cvt(tdbb, ttype, str, length);
fb_assert(length % sizeof(CharType) == 0);
return evaluator.processNextChunk(
reinterpret_cast<const CharType*>(str), length / sizeof(CharType));
}
~ContainsObjectImpl() {};
static ContainsObject* create(thread_db* tdbb, TextType ttype, const UCHAR* str, SSHORT length) {
StrConverter cvt(tdbb, ttype, str, length);
fb_assert(length % sizeof(CharType) == 0);
return FB_NEW(*tdbb->tdbb_default) ContainsObjectImpl(*tdbb->tdbb_default,
reinterpret_cast<const CharType*>(str), length / sizeof(CharType));
}
static bool evaluate(thread_db* tdbb, TextType ttype, const UCHAR* s, SSHORT sl,
const UCHAR* p, SSHORT pl)
{
StrConverter cvt1(tdbb, ttype, p, pl), cvt2(tdbb, ttype, s, sl);
fb_assert(pl % sizeof(CharType) == 0);
fb_assert(sl % sizeof(CharType) == 0);
Firebird::ContainsEvaluator<CharType> evaluator(*tdbb->tdbb_default,
reinterpret_cast<const CharType*>(p), pl / sizeof(CharType));
evaluator.processNextChunk(reinterpret_cast<const CharType*>(s), sl / sizeof(CharType));
return evaluator.getResult();
}
static void ttype_init(TEXTTYPE txtobj) {
txtobj->texttype_fn_contains = evaluate;
txtobj->texttype_fn_contains_create = create;
}
private:
Firebird::ContainsEvaluator<CharType> evaluator;
};
template <typename StrConverter, typename CharType>
class LikeObjectImpl : public LikeObject {
public:
LikeObjectImpl(MemoryPool& pool, const CharType* str, SSHORT str_len, CharType escape)
: evaluator(pool, str, str_len, escape, SQL_MATCH_ANY_CHARS, SQL_MATCH_1_CHAR)
{ }
void reset() { evaluator.reset(); }
bool result() { return evaluator.getResult(); };
bool process(thread_db* tdbb, Jrd::TextType ttype, const UCHAR* str, SSHORT length) {
StrConverter cvt(tdbb, ttype, str, length);
fb_assert(length % sizeof(CharType) == 0);
return evaluator.processNextChunk(
reinterpret_cast<const CharType*>(str), length / sizeof(CharType));
}
~LikeObjectImpl() {};
static LikeObject* create(thread_db* tdbb, TextType ttype, const UCHAR* str, SSHORT length,
UCS2_CHAR escape)
{
StrConverter cvt(tdbb, ttype, str, length);
fb_assert(length % sizeof(CharType) == 0);
return FB_NEW(*tdbb->tdbb_default) LikeObjectImpl(*tdbb->tdbb_default,
reinterpret_cast<const CharType*>(str), length / sizeof(CharType), escape);
}
static bool evaluate(thread_db* tdbb, TextType ttype, const UCHAR* s, SSHORT sl,
const UCHAR* p, SSHORT pl, UCS2_CHAR escape)
{
StrConverter cvt1(tdbb, ttype, p, pl), cvt2(tdbb, ttype, s, sl);
fb_assert(pl % sizeof(CharType) == 0);
fb_assert(sl % sizeof(CharType) == 0);
Firebird::LikeEvaluator<CharType> evaluator(*tdbb->tdbb_default,
reinterpret_cast<const CharType*>(p), pl / sizeof(CharType),
escape, SQL_MATCH_ANY_CHARS, SQL_MATCH_1_CHAR);
evaluator.processNextChunk(reinterpret_cast<const CharType*>(s), sl / sizeof(CharType));
return evaluator.getResult();
}
static void ttype_init(TEXTTYPE txtobj) {
txtobj->texttype_fn_like = evaluate;
txtobj->texttype_fn_like_create = create;
}
private:
Firebird::LikeEvaluator<CharType> evaluator;
};
static void finish_texttype_init(TEXTTYPE txtobj)
{
/**************************************
*
* f i n i s h _ t e x t t y p e _ i n i t
*
**************************************
*
* Functional description
*
* Finish initializing a text object with pointers to
* internal routines.
* This is also a handy place to check the licensing bits
* for the text object.
*
* Returns:
* The TEXTTYPE_init bit in texttype_flags is set if the
* object is sucessfully initialized.
*
**************************************/
typedef LikeObjectImpl<NullStrConverter, UCHAR> nc_like;
typedef ContainsObjectImpl<UpcaseConverter<NullStrConverter>, UCHAR> nc_contains;
typedef LikeObjectImpl<NullStrConverter, UCS2_CHAR> wc_like;
typedef ContainsObjectImpl<UpcaseConverter<NullStrConverter>, UCS2_CHAR> wc_contains;
typedef LikeObjectImpl<MBStrConverter, UCS2_CHAR> mb_like;
typedef ContainsObjectImpl<UpcaseConverter<MBStrConverter>, UCS2_CHAR> mb_contains;
if ((txtobj->texttype_fn_to_wc == NULL) &&
(txtobj->texttype_bytes_per_char == 1))
{
/* Finish initialization of a narrow character object */
txtobj->texttype_fn_to_wc = nc_to_wc;
txtobj->texttype_fn_matches = EVL_nc_matches;
txtobj->texttype_fn_sleuth_merge = EVL_nc_sleuth_merge;
txtobj->texttype_fn_sleuth_check = EVL_nc_sleuth_check;
if (!txtobj->texttype_fn_mbtowc)
txtobj->texttype_fn_mbtowc = INTL_builtin_nc_mbtowc;
nc_like::ttype_init(txtobj);
nc_contains::ttype_init(txtobj);
}
else if ((txtobj->texttype_fn_to_wc == NULL) &&
(txtobj->texttype_bytes_per_char == 2))
{
/* Finish initialization of a wide character object */
txtobj->texttype_fn_to_wc = reinterpret_cast<pfn_INTL_2wc>(wc_to_wc);
txtobj->texttype_fn_matches =
reinterpret_cast<texttype::pfn_INTL_matches>(EVL_wc_matches);
txtobj->texttype_fn_sleuth_merge =
reinterpret_cast<texttype::pfn_INTL_sleuth_merge>(EVL_wc_sleuth_merge);
txtobj->texttype_fn_sleuth_check =
reinterpret_cast<texttype::pfn_INTL_sleuth_check>(EVL_wc_sleuth_check);
if (!txtobj->texttype_fn_mbtowc)
txtobj->texttype_fn_mbtowc = INTL_builtin_wc_mbtowc;
wc_like::ttype_init(txtobj);
wc_contains::ttype_init(txtobj);
}
else if (txtobj->texttype_fn_to_wc != NULL) {
/* Finish initialization of a multibyte character object */
txtobj->texttype_fn_matches = EVL_mb_matches;
txtobj->texttype_fn_sleuth_merge = EVL_mb_sleuth_merge;
txtobj->texttype_fn_sleuth_check = EVL_mb_sleuth_check;
if (!txtobj->texttype_fn_mbtowc)
txtobj->texttype_fn_mbtowc = INTL_builtin_mb_mbtowc;
mb_like::ttype_init(txtobj);
mb_contains::ttype_init(txtobj);
}
else
fb_assert(0);
txtobj->texttype_flags |= TEXTTYPE_init;
}
static FPTR_SHORT lookup_init_function(
USHORT type,
SSHORT parm1,
SSHORT parm2)
{
/**************************************
*
* lookup_init_function
*
**************************************
*
* Functional description
* Find the allocator function for the requested international
* character set using the c/IB/FB 6.0 interface.
* Search algorithm is:
* Look in intllib
* Look in intllib2
* Look for a normal UDF entry
* Abort with an error.
*
* Returns:
* FALSE - no errors
* TRUE - error occurred, and parameter <err> was NULL;
* <never> - error occurred, and parameter <err> non-NULL;
*
*
***************************************/
if (!bcLoaded)
{
intlBCPlugins().addSearchPath(INTL_PLUGIN_DIR);
bcLoaded = true;
}
PluginManager::Plugin intlMod1 = intlBCPlugins().findPlugin(INTL_MODULE1);
PluginManager::Plugin intlMod2 = intlBCPlugins().findPlugin(INTL_MODULE2);
INTL_TRACE(("INTL: looking for obj %d ttype %d\n", objtype, parm1));
FPTR_SHORT function = INTL_builtin_lookup(type, parm1, parm2);
if (function)
return function;
typedef USHORT (*pfn_lookup) (USHORT, FPTR_SHORT*, SSHORT, SSHORT);
pfn_lookup lookup_fn;
#ifdef INTL_BUILTIN
if (LD_lookup(type, &function, parm1, parm2) != 0)
function = NULL;
else
return function;
#else
/* Look for an InterBase supplied object to implement the text type */
/* The flu.cpp uses searchpath which expects a file name not a path */
INTL_TRACE(("INTL: trying %s %s\n", INTL_MODULE1, INTL_LOOKUP_ENTRY1));
Firebird::string tempStr(INTL_LOOKUP_ENTRY1);
if ( intlMod1 && (lookup_fn = (pfn_lookup) intlMod1.lookupSymbol(tempStr)) )
{
INTL_TRACE(("INTL: calling lookup %s %s\n", INTL_MODULE1,
INTL_LOOKUP_ENTRY1));
if ((*lookup_fn) (type, &function, parm1, parm2) != 0) {
function = NULL;
}
else
{
return function;
}
}
#endif
/* Still not found, check the set of supplimental international objects */
#ifdef INTL_BUILTIN
if (LD2_lookup(type, &function, parm1, parm2) != 0)
function = NULL;
else
return function;
#else
/* Look for an InterBase supplied object to implement the text type */
/* The flu.cpp uses searchpath which expects a file name not a path */
INTL_TRACE(("INTL: trying %s %s\n", INTL_MODULE2, INTL_LOOKUP_ENTRY2));
tempStr = INTL_LOOKUP_ENTRY2;
if ( intlMod2 && (lookup_fn = (pfn_lookup) intlMod2.lookupSymbol(tempStr)) )
{
INTL_TRACE(("INTL: calling lookup %s %s\n", INTL_MODULE2,
INTL_LOOKUP_ENTRY2));
if ((*lookup_fn) (type, &function, parm1, parm2) != 0) {
function = NULL;
}
else
{
return function;
}
}
#endif
/* Still not found, check if there is a UDF in the database defined the right way */
USHORT argcount;
Firebird::string entry;
switch (type) {
case type_texttype:
entry.printf(INTL_USER_ENTRY, parm1);
argcount = 2;
break;
case type_charset:
entry.printf("USER_CHARSET_%03d", parm1);
argcount = 2;
break;
case type_csconvert:
entry.printf("USER_TRANSLATE_%03d_%03d", parm1, parm2);
argcount = 3;
break;
default:
BUGCHECK(1);
break;
}
INTL_TRACE(("INTL: trying user fn %s\n", entry.c_str()));
UserFunction* function_block = FUN_lookup_function(entry, false);
if (function_block) {
INTL_TRACE(("INTL: found a user fn, validating\n"));
if ((function_block->fun_count == argcount) &&
(function_block->fun_args == argcount) &&
(function_block->fun_return_arg == 0) &&
(function_block->fun_entrypoint != NULL) &&
(function_block->fun_rpt[0].fun_mechanism == FUN_value) &&
(function_block->fun_rpt[0].fun_desc.dsc_dtype == dtype_short)
&& (function_block->fun_rpt[1].fun_desc.dsc_dtype ==
dtype_short)
&& (function_block->fun_rpt[argcount - 1].
fun_desc.dsc_dtype == dtype_short)
&& (function_block->fun_rpt[argcount].fun_mechanism ==
FUN_reference)
&& (function_block->fun_rpt[argcount].fun_desc.dsc_dtype ==
dtype_text))
{
return (FPTR_SHORT)function_block->fun_entrypoint;
}
}
return NULL;
}
CHARSET_ID INTL_charset(thread_db* tdbb, USHORT ttype, FPTR_ERROR err)
{
/**************************************
*
* I N T L _ c h a r s e t
*
**************************************
*
* Functional description
* Return the character set ID for a piece of text.
*
**************************************/
switch (ttype)
{
case ttype_none:
return (CS_NONE);
case ttype_ascii:
return (CS_ASCII);
case ttype_unicode_fss:
return (CS_UNICODE_FSS);
case ttype_binary:
return (CS_BINARY);
case ttype_dynamic:
SET_TDBB(tdbb);
return (tdbb->tdbb_attachment->att_charset);
default:
return (TTYPE_TO_CHARSET(ttype));
}
}
int INTL_compare(thread_db* tdbb,
const dsc* pText1,
const dsc* pText2,
FPTR_ERROR err)
{
/**************************************
*
* I N T L _ c o m p a r e
*
**************************************
*
* Functional description
* Compare two pieces of international text.
*
**************************************/
SET_TDBB(tdbb);
fb_assert(pText1 != NULL);
fb_assert(pText2 != NULL);
fb_assert(IS_TEXT(pText1) && IS_TEXT(pText2));
fb_assert(INTL_data_or_binary(pText1) || INTL_data_or_binary(pText2));
fb_assert(err);
/* normal compare routine from CVT_compare */
/* trailing spaces in strings are ignored for comparision */
UCHAR* p1;
USHORT t1;
USHORT length1 = CVT_get_string_ptr(pText1, &t1, &p1, NULL, 0, err);
UCHAR* p2;
USHORT t2;
USHORT length2 = CVT_get_string_ptr(pText2, &t2, &p2, NULL, 0, err);
/* YYY - by SQL II compare_type must be explicit in the
SQL statement if there is any doubt */
SSHORT compare_type = MAX(t1, t2); /* YYY */
UCHAR buffer[MAX_KEY];
if (t1 != t2) {
CHARSET_ID cs1 = INTL_charset(tdbb, t1, err);
CHARSET_ID cs2 = INTL_charset(tdbb, t2, err);
if (cs1 != cs2) {
if (compare_type != t2) {
/* convert pText2 to pText1's type, if possible */
/* YYY - should failure to convert really return
an error here?
Support joining a 437 & Latin1 Column, and we
pick the compare_type as 437, still only want the
equal values....
But then, what about < operations, which make no
sense if the string cannot be expressed...
*/
length2 = INTL_convert_bytes(tdbb, cs1,
buffer, sizeof(buffer),
cs2, p2, length2, err);
p2 = buffer;
}
else {
/* convert pText1 to pText2's type, if possible */
length1 = INTL_convert_bytes(tdbb, cs2,
buffer, sizeof(buffer),
cs1, p1, length1, err);
p1 = buffer;
}
}
}
TextType obj = INTL_texttype_lookup(tdbb, compare_type, err, NULL);
return obj.compare(length1, p1, length2, p2);
}
USHORT INTL_convert_bytes(thread_db* tdbb,
CHARSET_ID dest_type,
BYTE* dest_ptr,
USHORT dest_len,
CHARSET_ID src_type,
const BYTE* src_ptr,
USHORT src_len,
FPTR_ERROR err)
{
/**************************************
*
* I N T L _ c o n v e r t _ b y t e s
*
**************************************
*
* Functional description
* Given a string of bytes in one character set, convert it to another
* character set.
*
* If (dest_ptr) is NULL, return the count of bytes needed to convert
* the string. This does not guarantee the string can be converted,
* the purpose of this is to allocate a large enough buffer.
*
* RETURNS:
* Length of resulting string, in bytes.
* calls (err) if conversion error occurs.
*
**************************************/
USHORT len;
USHORT len2;
SSHORT err_code = 0;
USHORT err_position;
SET_TDBB(tdbb);
fb_assert(src_ptr != NULL);
fb_assert(src_type != dest_type);
fb_assert(err != NULL);
const UCHAR* const start_dest_ptr = dest_ptr;
if ((dest_type == CS_BINARY) || (dest_type == CS_NONE)) {
/* See if we just need a length estimate */
if (dest_ptr == NULL)
return (src_len);
len = MIN(dest_len, src_len);
if (len)
do {
*dest_ptr++ = *src_ptr++;
} while (--len);
/* See if only space characters are remaining */
len = src_len - MIN(dest_len, src_len);
if (!len || all_spaces(tdbb, src_type, src_ptr, len, 0))
return (dest_ptr - start_dest_ptr);
else
(*err) (isc_arith_except, 0);
}
else if (src_len == 0)
return (0);
else if (src_type == CS_BINARY)
(*err)(isc_arith_except, isc_arg_gds, isc_transliteration_failed, 0);
else
/* character sets are known to be different */
{
/* Do we know an object from cs1 to cs2? */
CsConvert cs_obj = INTL_convert_lookup(tdbb, dest_type, src_type);
if (cs_obj != NULL) {
len = cs_obj.convert(dest_ptr, dest_len, src_ptr,
src_len, &err_code, &err_position);
if (!err_code || ((err_code == CS_TRUNCATION_ERROR)
&& all_spaces(tdbb, src_type, src_ptr, src_len,
err_position)))
{
return (len);
}
else if (err_code == CS_TRUNCATION_ERROR)
(*err) (isc_arith_except, 0);
else
(*err) (isc_arith_except, isc_arg_gds, isc_transliteration_failed, 0);
}
/* Find a CS1 to UNICODE object */
CharSet from_cs = INTL_charset_lookup(tdbb, src_type, NULL);
if (from_cs == NULL)
(*err)(isc_arith_except, isc_arg_gds, isc_text_subtype, isc_arg_number,
(ISC_STATUS) src_type, 0);
/*
** allocate a temporary buffer that is large enough.
*/
BYTE* tmp_buffer =
(BYTE *) FB_NEW(*tdbb->tdbb_default) char[(SLONG) src_len * sizeof(UCS2_CHAR)];
cs_obj = from_cs.getConvToUnicode();
fb_assert(cs_obj != NULL);
len = cs_obj.convert(tmp_buffer, src_len * 2, src_ptr,
src_len, &err_code, &err_position);
if (err_code && !((err_code == CS_TRUNCATION_ERROR)
&& all_spaces(tdbb, src_type, src_ptr, src_len,
err_position)))
{
delete [] tmp_buffer;
if (err_code == CS_TRUNCATION_ERROR)
(*err) (isc_arith_except, 0);
else
(*err) (isc_arith_except, isc_arg_gds, isc_transliteration_failed, 0);
}
/* Find a UNICODE to CS2 object */
CharSet to_cs = INTL_charset_lookup(tdbb, dest_type, NULL);
if (to_cs == NULL) {
delete [] tmp_buffer;
(*err) (isc_arith_except, isc_arg_gds, isc_text_subtype, isc_arg_number,
(ISC_STATUS) dest_type, 0);
}
cs_obj = to_cs.getConvFromUnicode();
fb_assert(cs_obj != NULL);
len2 = cs_obj.convert(dest_ptr, dest_len, tmp_buffer,
len, &err_code, &err_position);
if (err_code &&
!((err_code == CS_TRUNCATION_ERROR) &&
all_spaces(tdbb, CS_UNICODE_UCS2, tmp_buffer, len, err_position)))
{
delete [] tmp_buffer;
if (err_code == CS_TRUNCATION_ERROR)
(*err) (isc_arith_except, 0);
else
(*err) (isc_arith_except, isc_arg_gds, isc_transliteration_failed, 0);
}
delete [] tmp_buffer;
return (len2);
}
return (0); /* to remove compiler errors. This should never be executed */
}
CsConvert INTL_convert_lookup(thread_db* tdbb,
CHARSET_ID to_cs,
CHARSET_ID from_cs)
{
/**************************************
*
* I N T L _ c o n v e r t _ l o o k u p
*
**************************************
*
* Functional description
*
**************************************/
CharSetContainer *charset;
SET_TDBB(tdbb);
Database* dbb = tdbb->tdbb_database;
CHECK_DBB(dbb);
if (from_cs == CS_dynamic)
from_cs = tdbb->tdbb_attachment->att_charset;
if (to_cs == CS_dynamic)
to_cs = tdbb->tdbb_attachment->att_charset;
/* Should from_cs == to_cs? be handled better? YYY */
fb_assert(from_cs != CS_dynamic);
fb_assert(to_cs != CS_dynamic);
charset = CharSetContainer::lookupCharset(tdbb, from_cs, NULL);
if (charset == NULL)
return NULL;
return charset->lookupConverter(tdbb, to_cs);
}
int INTL_convert_string(dsc* to, const dsc* from, FPTR_ERROR err)
{
/**************************************
*
* I N T L _ c o n v e r t _ s t r i n g
*
**************************************
*
* Functional description
* Convert a string from one type to another
*
* RETURNS:
* 0 if no error in conversion
* non-zero otherwise.
* CVC: Unfortunately, this function puts the source in the 2nd param,
* as opposed to the CVT routines, so const help mitigating coding mistakes.
*
**************************************/
/* Note: This function is called from outside the engine as
well as inside - we likely can't get rid of JRD_get_thread_data here */
thread_db* tdbb = JRD_get_thread_data;
if (tdbb == NULL) /* are we in the Engine? */
return (1); /* no, then can't access intl gah */
fb_assert(to != NULL);
fb_assert(from != NULL);
fb_assert(IS_TEXT(to) && IS_TEXT(from));
CHARSET_ID from_cs = INTL_charset(tdbb, INTL_TTYPE(from), err);
CHARSET_ID to_cs = INTL_charset(tdbb, INTL_TTYPE(to), err);
UCHAR* p = to->dsc_address;
/* Must convert dtype(cstring,text,vary) and ttype(ascii,binary,..intl..) */
UCHAR* from_ptr;
USHORT from_type;
const USHORT from_len =
CVT_get_string_ptr(from, &from_type, &from_ptr, NULL, 0, err);
USHORT to_size, to_len, to_fill;
to_size = to_len = TEXT_LEN(to);
USHORT from_fill;
const UCHAR* q = from_ptr;
switch (to->dsc_dtype) {
case dtype_text:
if ((from_cs != to_cs) && (to_cs != CS_BINARY) && (to_cs != CS_NONE) && (from_cs != CS_NONE)) {
to_len = INTL_convert_bytes(tdbb, to_cs, to->dsc_address, to_size,
from_cs, from_ptr, from_len, err);
to_fill = to_size - to_len;
from_fill = 0; /* Convert_bytes handles source truncation */
p += to_len;
}
else {
/* binary string can always be converted TO by byte-copy */
to_len = MIN(from_len, to_size);
from_fill = from_len - to_len;
to_fill = to_size - to_len;
if (to_len)
do
*p++ = *q++;
while (--to_len);
}
if (to_fill > 0)
pad_spaces(tdbb, to_cs, p, to_fill);
break;
case dtype_cstring:
if ((from_cs != to_cs) && (to_cs != CS_BINARY) && (to_cs != CS_NONE) && (from_cs != CS_NONE)) {
to_len = INTL_convert_bytes(tdbb, to_cs, to->dsc_address, to_size,
from_cs, from_ptr, from_len, err);
to->dsc_address[to_len] = 0;
from_fill = 0; /* Convert_bytes handles source truncation */
}
else {
/* binary string can always be converted TO by byte-copy */
to_len = MIN(from_len, to_size);
from_fill = from_len - to_len;
if (to_len)
do
*p++ = *q++;
while (--to_len);
*p = 0;
}
break;
case dtype_varying:
if ((from_cs != to_cs) && (to_cs != CS_BINARY) && (to_cs != CS_NONE) && (from_cs != CS_NONE)) {
to_len =
INTL_convert_bytes(tdbb, to_cs,
reinterpret_cast<UCHAR*>(((vary*) to->dsc_address)->vary_string),
to_size, from_cs, from_ptr, from_len, err);
((vary*) to->dsc_address)->vary_length = to_len;
from_fill = 0; /* Convert_bytes handles source truncation */
}
else {
/* binary string can always be converted TO by byte-copy */
to_len = MIN(from_len, to_size);
from_fill = from_len - to_len;
((vary*) p)->vary_length = to_len;
p = reinterpret_cast<UCHAR*>(((vary*) p)->vary_string);
if (to_len)
do
*p++ = *q++;
while (--to_len);
}
break;
}
if (from_fill)
/* Make sure remaining characters on From string are spaces */
if (!all_spaces(tdbb, from_cs, q, from_fill, 0))
(*err) (isc_arith_except, 0);
return 0;
}
int INTL_data(const dsc* pText)
{
/**************************************
*
* I N T L _ d a t a
*
**************************************
*
* Functional description
* Given an input text descriptor,
* return TRUE if the data pointed to represents
* international text (subject to user defined or non-binary
* collation or comparison).
*
**************************************/
fb_assert(pText != NULL);
if (!IS_TEXT(pText))
return FALSE;
if (!INTERNAL_TTYPE(pText))
return TRUE;
return FALSE;
}
int INTL_data_or_binary(const dsc* pText)
{
/**************************************
*
* I N T L _ d a t a _ o r _ b i n a r y
*
**************************************
*
* Functional description
*
**************************************/
return (INTL_data(pText) || (pText->dsc_ttype() == ttype_binary));
}
int INTL_defined_type(thread_db* tdbb, ISC_STATUS * status, SSHORT t_type)
{
/**************************************
*
* I N T L _ d e f i n e d _ t y p e
*
**************************************
*
* Functional description
* Is (t_type) a known text type?
* Return:
* FALSE type is not defined.
* TRUE type is defined
* status set to gds_status codes to describe any error.
*
* Note:
* Due to cleanup that must happen in DFW, this routine
* must return, and not call ERR directly.
*
**************************************/
SET_TDBB(tdbb);
if (status)
status[0] = isc_arg_end;
TextType obj = INTL_texttype_lookup(tdbb, t_type, NULL, status);
if (obj == NULL)
return FALSE;
return TRUE;
}
UCS2_CHAR INTL_getch(thread_db* tdbb,
TextType* obj,
SSHORT t_type, const UCHAR** ptr, USHORT* count)
{
/**************************************
*
* I N T L _ g e t c h
*
**************************************
*
* Functional description
* Get next character from a buffer.
*
**************************************/
SET_TDBB(tdbb);
fb_assert(obj);
fb_assert(ptr);
if (*obj == NULL) {
*obj = INTL_texttype_lookup(tdbb, t_type, ERR_post, NULL);
fb_assert(*obj != NULL);
}
UCS2_CHAR wc;
const SSHORT used = obj->mbtowc(&wc, *ptr, *count);
if (used == -1)
return 0;
*ptr += used;
*count -= used;
return wc;
}
void INTL_init(thread_db* tdbb)
{
/**************************************
*
* I N T L _ i n i t
*
**************************************
*
* Functional description
*
**************************************/
}
USHORT INTL_key_length(thread_db* tdbb, USHORT idxType, USHORT iLength)
{
/**************************************
*
* I N T L _ k e y _ l e n g t h
*
**************************************
*
* Functional description
* Given an index type, and a maximum length (iLength)
* return the length of the byte string key descriptor to
* use when collating text of this type.
*
**************************************/
SET_TDBB(tdbb);
fb_assert(idxType >= idx_first_intl_string);
const SSHORT ttype = INTL_INDEX_TO_TEXT(idxType);
USHORT key_length;
if (ttype >= 0 && ttype <= ttype_last_internal)
key_length = iLength;
else {
TextType obj = INTL_texttype_lookup(tdbb, ttype, ERR_post, NULL);
key_length = obj.key_length(iLength);
}
/* Validity checks on the computed key_length */
if (key_length > MAX_KEY)
key_length = MAX_KEY;
if (key_length < iLength)
key_length = iLength;
return (key_length);
}
CharSet INTL_charset_lookup(thread_db* tdbb, SSHORT parm1, ISC_STATUS* status)
{
/**************************************
*
* I N T L _ c h a r s e t _ l o o k u p
*
**************************************
*
* Functional description
*
* Lookup a character set descriptor.
*
* First, search the appropriate vector that hangs
* off the dbb. If not found, then call the lower
* level lookup routine to allocate it, or return
* null if we don't know about the charset.
*
* Returns:
* *charset - if no errors;
* <never> - if error & err non NULL
* NULL - if error & err NULL
*
**************************************/
CharSetContainer *cs = CharSetContainer::lookupCharset(tdbb, parm1, status);
if (!cs) return NULL;
return cs->getCharSet();
}
TextType INTL_texttype_lookup(thread_db* tdbb,
SSHORT parm1,
FPTR_ERROR err,
ISC_STATUS* status)
{
/**************************************
*
* I N T L _ t e x t t y p e _ l o o k u p
*
**************************************
*
* Functional description
*
* Lookup either a character set descriptor or
* texttype descriptor object.
*
* First, search the appropriate vector that hangs
* off the dbb. If not found, then call the lower
* level lookup routine to find it in the libraries.
*
* Returns:
* *object - if no errors;
* <never> - if error & err non NULL
* NULL - if error & err NULL
*
**************************************/
SET_TDBB(tdbb);
Database* dbb = tdbb->tdbb_database;
if (parm1 == ttype_dynamic)
parm1 = MAP_CHARSET_TO_TTYPE(tdbb->tdbb_attachment->att_charset);
CharSetContainer* csc = CharSetContainer::lookupCharset(tdbb, parm1, status);
if (!csc)
return NULL;
return csc->lookupCollation(tdbb, parm1);
}
void INTL_pad_spaces(thread_db* tdbb, DSC * type, UCHAR * string, USHORT length)
{
/**************************************
*
* I N T L _ p a d _ s p a c e s
*
**************************************
*
* Functional description
* Pad a buffer with spaces, using the character
* set's defined space character.
*
**************************************/
SET_TDBB(tdbb);
fb_assert(type != NULL);
fb_assert(IS_TEXT(type));
fb_assert(string != NULL);
const USHORT charset = INTL_charset(tdbb, type->dsc_ttype(), NULL);
pad_spaces(tdbb, charset, string, length);
}
USHORT INTL_string_to_key(thread_db* tdbb,
USHORT idxType,
const dsc* pString,
DSC* pByte,
bool partial)
{
/**************************************
*
* I N T L _ s t r i n g _ t o _ k e y
*
**************************************
*
* Functional description
* Given an input string, convert it to a byte string
* that will collate naturally (byte order).
*
* Return the length of the resulting byte string.
*
**************************************/
UCHAR pad_char;
SSHORT ttype;
SET_TDBB(tdbb);
fb_assert(idxType >= idx_first_intl_string || idxType == idx_string
|| idxType == idx_byte_array || idxType == idx_metadata);
fb_assert(pString != NULL);
fb_assert(pByte != NULL);
fb_assert(pString->dsc_address != NULL);
fb_assert(pByte->dsc_address != NULL);
fb_assert(pByte->dsc_dtype == dtype_text);
switch (idxType) {
case idx_string:
pad_char = ' ';
ttype = ttype_none;
break;
case idx_byte_array:
pad_char = 0;
ttype = ttype_binary;
break;
case idx_metadata:
pad_char = ' ';
ttype = ttype_metadata;
break;
default:
pad_char = 0;
ttype = INTL_INDEX_TO_TEXT(idxType);
break;
}
/* Make a string into the proper type of text */
UCHAR buffer[MAX_KEY];
const char* src;
USHORT len =
CVT_make_string(pString, ttype, &src,
reinterpret_cast<vary*>(buffer), sizeof(buffer),
ERR_post);
USHORT outlen;
char* dest = reinterpret_cast<char*>(pByte->dsc_address);
switch (ttype) {
case ttype_metadata:
case ttype_binary:
case ttype_ascii:
case ttype_none:
while (len--)
*dest++ = *src++;
/* strip off ending pad characters */
while (dest > (const char*)pByte->dsc_address) {
if (*(dest - 1) == pad_char)
dest--;
else
break;
}
outlen = (dest - (const char*)pByte->dsc_address);
break;
default:
TextType obj = INTL_texttype_lookup(tdbb, ttype, ERR_post, NULL);
outlen = obj.string_to_key(len,
reinterpret_cast<const unsigned char*>(src),
pByte->dsc_length,
reinterpret_cast<unsigned char*>(dest),
partial ? TRUE : FALSE);
break;
}
return (outlen);
}
int INTL_str_to_upper(thread_db* tdbb, DSC * pString)
{
/**************************************
*
* I N T L _ s t r _ t o _ u p p e r
*
**************************************
*
* Functional description
* Given an input string, convert it to uppercase
*
**************************************/
SET_TDBB(tdbb);
fb_assert(pString != NULL);
fb_assert(pString->dsc_address != NULL);
UCHAR* src;
UCHAR buffer[MAX_KEY];
USHORT ttype;
USHORT len =
CVT_get_string_ptr(pString, &ttype, &src,
reinterpret_cast<vary*>(buffer),
sizeof(buffer), ERR_post);
UCHAR* dest;
switch (ttype) {
case ttype_binary:
/* cannot uppercase binary strings */
break;
case ttype_none:
case ttype_ascii:
case ttype_unicode_fss:
dest = src;
while (len--) {
*dest++ = UPPER7(*src);
src++;
}
break;
default:
TextType obj = INTL_texttype_lookup(tdbb, ttype, ERR_post, NULL);
obj.str_to_upper(len, src, len, src);
break;
}
/*
* Added to remove compiler errors. Callers are not checking
* the return code from this function 4/5/95.
*/
return (0);
}
UCHAR INTL_upper(thread_db* tdbb, USHORT ttype, UCHAR ch)
{
/**************************************
*
* I N T L _ u p p e r
*
**************************************
*
* Functional description
* Given an input character, convert it to uppercase
*
**************************************/
SET_TDBB(tdbb);
switch (ttype) {
case ttype_binary:
/* cannot uppercase binary strings */
return (ch);
case ttype_none:
case ttype_ascii:
case ttype_unicode_fss:
return (UPPER7(ch));
default:
TextType obj = INTL_texttype_lookup(tdbb, ttype, ERR_post, NULL);
return obj.to_upper(ch);
}
}
static bool all_spaces(
thread_db* tdbb,
CHARSET_ID charset,
const BYTE* ptr, USHORT len, USHORT offset)
{
/**************************************
*
* a l l _ s p a c e s
*
**************************************
*
* Functional description
* determine if the string at ptr[offset] ... ptr[len] is entirely
* spaces, as per the space definition of (charset).
* The binary representation of a Space is character-set dependent.
* (0x20 for Ascii, 0x0020 for Unicode, 0x20 for SJIS, but must watch for
* 0x??20, which is NOT a space.
**************************************/
SET_TDBB(tdbb);
fb_assert(ptr != NULL);
CharSet obj = INTL_charset_lookup(tdbb, charset, NULL);
fb_assert(obj != NULL);
/*
* We are assuming offset points to the first byte which was not
* consumed in a conversion. And that offset is pointing
* to a character boundary
*/
// Single-octet character sets are optimized here
if (obj.getSpaceLength() == 1) {
const BYTE* p = &ptr[offset];
const BYTE* const end = &ptr[len];
while (p < end) {
if (*p++ != *obj.getSpace())
return false;
}
return true;
}
else {
const BYTE* p = &ptr[offset];
const BYTE* const end = &ptr[len];
const unsigned char* space = obj.getSpace();
const unsigned char* const end_space = &space[obj.getSpaceLength()];
while (p < end) {
space = obj.getSpace();
while (p < end && space < end_space) {
if (*p++ != *space++)
return false;
}
}
return true;
}
}
static USHORT nc_to_wc(TEXTTYPE obj, UCS2_CHAR* pWide, USHORT nWide, /* byte count */
const UCHAR* pNarrow, USHORT nNarrow, /* byte count */
SSHORT* err_code, USHORT* err_position)
{
/**************************************
*
* n c _ t o _ w c
*
**************************************
*
* Functional description
* Copies narrow chars buffer into wide chars buffer for charset NONE
*
**************************************/
fb_assert(obj != NULL);
fb_assert((pNarrow != NULL) || (pWide == NULL));
fb_assert(err_code != NULL);
fb_assert(err_position != NULL);
*err_code = 0;
if (pWide == NULL)
return (sizeof(UCS2_CHAR) * nNarrow); /* all cases */
const UCS2_CHAR* const pStart = pWide;
const UCHAR* const pNarrowStart = pNarrow;
while (nWide-- > 1 && nNarrow) {
/* YYY - Byte order issues here */
*pWide++ = (UCS2_CHAR) *pNarrow++;
nWide--;
nNarrow--;
}
if (!*err_code && nNarrow) {
*err_code = CS_TRUNCATION_ERROR;
}
*err_position = (pNarrow - pNarrowStart) * sizeof(*pNarrow);
return ((pWide - pStart) * sizeof(*pWide));
}
static USHORT wc_to_wc(TEXTTYPE obj, UCS2_CHAR* pDest, USHORT nDest, /* byte count */
const UCS2_CHAR* pSrc, USHORT nSrc, /* byte count */
SSHORT* err_code, USHORT* err_position)
{
/**************************************
*
* w c _ t o _ w c
*
**************************************
*
* Functional description
*
*************************************/
fb_assert(obj != NULL);
fb_assert((pSrc != NULL) || (pDest == NULL));
fb_assert(err_code != NULL);
fb_assert(err_position != NULL);
*err_code = 0;
if (pDest == NULL) /* length estimate needed? */
return (nSrc);
const UCS2_CHAR* const pStart = pDest;
const UCS2_CHAR* const pStart_src = pSrc;
while (nDest > 1 && nSrc > 1) {
*pDest++ = *pSrc++;
nDest -= 2;
nSrc -= 2;
}
if (!*err_code && nSrc) {
*err_code = CS_TRUNCATION_ERROR;
}
*err_position = (pSrc - pStart_src) * sizeof(*pSrc);
return ((pDest - pStart) * sizeof(*pDest));
}
static void pad_spaces(thread_db* tdbb, CHARSET_ID charset, BYTE* ptr, USHORT len)
{ /* byte count */
/**************************************
*
* p a d _ s p a c e s
*
**************************************
*
* Functional description
* Pad a buffer with the character set defined space character.
*
**************************************/
SET_TDBB(tdbb);
fb_assert(ptr != NULL);
CharSet obj = INTL_charset_lookup(tdbb, charset, NULL);
fb_assert(obj != NULL);
/* Single-octet character sets are optimized here */
if (obj.getSpaceLength() == 1) {
const BYTE* const end = &ptr[len];
while (ptr < end)
*ptr++ = *obj.getSpace();
}
else {
const BYTE* const end = &ptr[len];
const UCHAR* space = obj.getSpace();
const UCHAR* const end_space = &space[obj.getSpaceLength()];
while (ptr < end) {
space = obj.getSpace();
while (ptr < end && space < end_space) {
*ptr++ = *space++;
}
/* This fb_assert is checking that we didn't have a buffer-end
* in the middle of a space character
*/
fb_assert(!(ptr == end) || (space == end_space));
}
}
}
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