243 lines
8.2 KiB
C++
243 lines
8.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ArrayUtils.h"
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#include "SQLCollations.h"
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namespace mozilla {
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namespace storage {
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////////////////////////////////////////////////////////////////////////////////
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//// Local Helper Functions
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namespace {
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/**
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* Helper function for the UTF-8 locale collations.
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*
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* @param aService
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* The Service that owns the nsICollation used by this collation.
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* @param aLen1
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* The number of bytes in aStr1.
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* @param aStr1
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* The string to be compared against aStr2 as provided by SQLite. It
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* must be a non-null-terminated char* buffer.
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* @param aLen2
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* The number of bytes in aStr2.
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* @param aStr2
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* The string to be compared against aStr1 as provided by SQLite. It
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* must be a non-null-terminated char* buffer.
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* @param aComparisonStrength
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* The sorting strength, one of the nsICollation constants.
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* @return aStr1 - aStr2. That is, if aStr1 < aStr2, returns a negative number.
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* If aStr1 > aStr2, returns a positive number. If aStr1 == aStr2,
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* returns 0.
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*/
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int
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localeCollationHelper8(void *aService,
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int aLen1,
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const void *aStr1,
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int aLen2,
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const void *aStr2,
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int32_t aComparisonStrength)
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{
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NS_ConvertUTF8toUTF16 str1(static_cast<const char *>(aStr1), aLen1);
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NS_ConvertUTF8toUTF16 str2(static_cast<const char *>(aStr2), aLen2);
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Service *serv = static_cast<Service *>(aService);
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return serv->localeCompareStrings(str1, str2, aComparisonStrength);
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}
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/**
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* Helper function for the UTF-16 locale collations.
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*
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* @param aService
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* The Service that owns the nsICollation used by this collation.
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* @param aLen1
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* The number of bytes (not characters) in aStr1.
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* @param aStr1
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* The string to be compared against aStr2 as provided by SQLite. It
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* must be a non-null-terminated char16_t* buffer.
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* @param aLen2
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* The number of bytes (not characters) in aStr2.
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* @param aStr2
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* The string to be compared against aStr1 as provided by SQLite. It
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* must be a non-null-terminated char16_t* buffer.
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* @param aComparisonStrength
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* The sorting strength, one of the nsICollation constants.
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* @return aStr1 - aStr2. That is, if aStr1 < aStr2, returns a negative number.
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* If aStr1 > aStr2, returns a positive number. If aStr1 == aStr2,
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* returns 0.
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*/
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int
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localeCollationHelper16(void *aService,
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int aLen1,
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const void *aStr1,
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int aLen2,
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const void *aStr2,
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int32_t aComparisonStrength)
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{
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const char16_t *buf1 = static_cast<const char16_t *>(aStr1);
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const char16_t *buf2 = static_cast<const char16_t *>(aStr2);
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// The second argument to the nsDependentSubstring constructor is exclusive:
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// It points to the char16_t immediately following the last one in the target
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// substring. Since aLen1 and aLen2 are in bytes, divide by sizeof(char16_t)
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// so that the pointer arithmetic is correct.
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nsDependentSubstring str1(buf1, buf1 + (aLen1 / sizeof(char16_t)));
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nsDependentSubstring str2(buf2, buf2 + (aLen2 / sizeof(char16_t)));
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Service *serv = static_cast<Service *>(aService);
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return serv->localeCompareStrings(str1, str2, aComparisonStrength);
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}
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// This struct is used only by registerCollations below, but ISO C++98 forbids
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// instantiating a template dependent on a locally-defined type. Boo-urns!
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struct Collations {
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const char *zName;
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int enc;
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int(*xCompare)(void*, int, const void*, int, const void*);
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};
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} // namespace
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////////////////////////////////////////////////////////////////////////////////
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//// Exposed Functions
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int
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registerCollations(sqlite3 *aDB,
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Service *aService)
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{
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Collations collations[] = {
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{"locale",
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SQLITE_UTF8,
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localeCollation8},
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{"locale_case_sensitive",
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SQLITE_UTF8,
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localeCollationCaseSensitive8},
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{"locale_accent_sensitive",
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SQLITE_UTF8,
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localeCollationAccentSensitive8},
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{"locale_case_accent_sensitive",
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SQLITE_UTF8,
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localeCollationCaseAccentSensitive8},
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{"locale",
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SQLITE_UTF16,
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localeCollation16},
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{"locale_case_sensitive",
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SQLITE_UTF16,
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localeCollationCaseSensitive16},
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{"locale_accent_sensitive",
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SQLITE_UTF16,
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localeCollationAccentSensitive16},
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{"locale_case_accent_sensitive",
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SQLITE_UTF16,
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localeCollationCaseAccentSensitive16},
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};
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int rv = SQLITE_OK;
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for (size_t i = 0; SQLITE_OK == rv && i < ArrayLength(collations); ++i) {
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struct Collations *p = &collations[i];
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rv = ::sqlite3_create_collation(aDB, p->zName, p->enc, aService,
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p->xCompare);
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}
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return rv;
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}
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////////////////////////////////////////////////////////////////////////////////
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//// SQL Collations
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int
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localeCollation8(void *aService,
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int aLen1,
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const void *aStr1,
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int aLen2,
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const void *aStr2)
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{
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return localeCollationHelper8(aService, aLen1, aStr1, aLen2, aStr2,
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nsICollation::kCollationCaseInSensitive);
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}
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int
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localeCollationCaseSensitive8(void *aService,
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int aLen1,
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const void *aStr1,
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int aLen2,
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const void *aStr2)
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{
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return localeCollationHelper8(aService, aLen1, aStr1, aLen2, aStr2,
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nsICollation::kCollationAccentInsenstive);
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}
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int
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localeCollationAccentSensitive8(void *aService,
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int aLen1,
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const void *aStr1,
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int aLen2,
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const void *aStr2)
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{
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return localeCollationHelper8(aService, aLen1, aStr1, aLen2, aStr2,
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nsICollation::kCollationCaseInsensitiveAscii);
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}
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int
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localeCollationCaseAccentSensitive8(void *aService,
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int aLen1,
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const void *aStr1,
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int aLen2,
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const void *aStr2)
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{
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return localeCollationHelper8(aService, aLen1, aStr1, aLen2, aStr2,
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nsICollation::kCollationCaseSensitive);
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}
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int
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localeCollation16(void *aService,
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int aLen1,
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const void *aStr1,
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int aLen2,
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const void *aStr2)
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{
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return localeCollationHelper16(aService, aLen1, aStr1, aLen2, aStr2,
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nsICollation::kCollationCaseInSensitive);
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}
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int
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localeCollationCaseSensitive16(void *aService,
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int aLen1,
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const void *aStr1,
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int aLen2,
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const void *aStr2)
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{
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return localeCollationHelper16(aService, aLen1, aStr1, aLen2, aStr2,
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nsICollation::kCollationAccentInsenstive);
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}
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int
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localeCollationAccentSensitive16(void *aService,
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int aLen1,
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const void *aStr1,
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int aLen2,
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const void *aStr2)
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{
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return localeCollationHelper16(aService, aLen1, aStr1, aLen2, aStr2,
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nsICollation::kCollationCaseInsensitiveAscii);
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}
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int
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localeCollationCaseAccentSensitive16(void *aService,
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int aLen1,
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const void *aStr1,
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int aLen2,
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const void *aStr2)
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{
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return localeCollationHelper16(aService, aLen1, aStr1, aLen2, aStr2,
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nsICollation::kCollationCaseSensitive);
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}
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} // namespace storage
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} // namespace mozilla
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