diff options
Diffstat (limited to 'chromium/third_party/sqlite/patched/src/callback.c')
| -rw-r--r-- | chromium/third_party/sqlite/patched/src/callback.c | 141 |
1 files changed, 88 insertions, 53 deletions
diff --git a/chromium/third_party/sqlite/patched/src/callback.c b/chromium/third_party/sqlite/patched/src/callback.c index e356b19e612..7a58b8e763e 100644 --- a/chromium/third_party/sqlite/patched/src/callback.c +++ b/chromium/third_party/sqlite/patched/src/callback.c @@ -66,51 +66,6 @@ static int synthCollSeq(sqlite3 *db, CollSeq *pColl){ } /* -** This function is responsible for invoking the collation factory callback -** or substituting a collation sequence of a different encoding when the -** requested collation sequence is not available in the desired encoding. -** -** If it is not NULL, then pColl must point to the database native encoding -** collation sequence with name zName, length nName. -** -** The return value is either the collation sequence to be used in database -** db for collation type name zName, length nName, or NULL, if no collation -** sequence can be found. If no collation is found, leave an error message. -** -** See also: sqlite3LocateCollSeq(), sqlite3FindCollSeq() -*/ -CollSeq *sqlite3GetCollSeq( - Parse *pParse, /* Parsing context */ - u8 enc, /* The desired encoding for the collating sequence */ - CollSeq *pColl, /* Collating sequence with native encoding, or NULL */ - const char *zName /* Collating sequence name */ -){ - CollSeq *p; - sqlite3 *db = pParse->db; - - p = pColl; - if( !p ){ - p = sqlite3FindCollSeq(db, enc, zName, 0); - } - if( !p || !p->xCmp ){ - /* No collation sequence of this type for this encoding is registered. - ** Call the collation factory to see if it can supply us with one. - */ - callCollNeeded(db, enc, zName); - p = sqlite3FindCollSeq(db, enc, zName, 0); - } - if( p && !p->xCmp && synthCollSeq(db, p) ){ - p = 0; - } - assert( !p || p->xCmp ); - if( p==0 ){ - sqlite3ErrorMsg(pParse, "no such collation sequence: %s", zName); - pParse->rc = SQLITE_ERROR_MISSING_COLLSEQ; - } - return p; -} - -/* ** This routine is called on a collation sequence before it is used to ** check that it is defined. An undefined collation sequence exists when ** a database is loaded that contains references to collation sequences @@ -202,10 +157,10 @@ static CollSeq *findCollSeqEntry( ** See also: sqlite3LocateCollSeq(), sqlite3GetCollSeq() */ CollSeq *sqlite3FindCollSeq( - sqlite3 *db, - u8 enc, - const char *zName, - int create + sqlite3 *db, /* Database connection to search */ + u8 enc, /* Desired text encoding */ + const char *zName, /* Name of the collating sequence. Might be NULL */ + int create /* True to create CollSeq if doesn't already exist */ ){ CollSeq *pColl; if( zName ){ @@ -219,6 +174,85 @@ CollSeq *sqlite3FindCollSeq( return pColl; } +/* +** This function is responsible for invoking the collation factory callback +** or substituting a collation sequence of a different encoding when the +** requested collation sequence is not available in the desired encoding. +** +** If it is not NULL, then pColl must point to the database native encoding +** collation sequence with name zName, length nName. +** +** The return value is either the collation sequence to be used in database +** db for collation type name zName, length nName, or NULL, if no collation +** sequence can be found. If no collation is found, leave an error message. +** +** See also: sqlite3LocateCollSeq(), sqlite3FindCollSeq() +*/ +CollSeq *sqlite3GetCollSeq( + Parse *pParse, /* Parsing context */ + u8 enc, /* The desired encoding for the collating sequence */ + CollSeq *pColl, /* Collating sequence with native encoding, or NULL */ + const char *zName /* Collating sequence name */ +){ + CollSeq *p; + sqlite3 *db = pParse->db; + + p = pColl; + if( !p ){ + p = sqlite3FindCollSeq(db, enc, zName, 0); + } + if( !p || !p->xCmp ){ + /* No collation sequence of this type for this encoding is registered. + ** Call the collation factory to see if it can supply us with one. + */ + callCollNeeded(db, enc, zName); + p = sqlite3FindCollSeq(db, enc, zName, 0); + } + if( p && !p->xCmp && synthCollSeq(db, p) ){ + p = 0; + } + assert( !p || p->xCmp ); + if( p==0 ){ + sqlite3ErrorMsg(pParse, "no such collation sequence: %s", zName); + pParse->rc = SQLITE_ERROR_MISSING_COLLSEQ; + } + return p; +} + +/* +** This function returns the collation sequence for database native text +** encoding identified by the string zName. +** +** If the requested collation sequence is not available, or not available +** in the database native encoding, the collation factory is invoked to +** request it. If the collation factory does not supply such a sequence, +** and the sequence is available in another text encoding, then that is +** returned instead. +** +** If no versions of the requested collations sequence are available, or +** another error occurs, NULL is returned and an error message written into +** pParse. +** +** This routine is a wrapper around sqlite3FindCollSeq(). This routine +** invokes the collation factory if the named collation cannot be found +** and generates an error message. +** +** See also: sqlite3FindCollSeq(), sqlite3GetCollSeq() +*/ +CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName){ + sqlite3 *db = pParse->db; + u8 enc = ENC(db); + u8 initbusy = db->init.busy; + CollSeq *pColl; + + pColl = sqlite3FindCollSeq(db, enc, zName, initbusy); + if( !initbusy && (!pColl || !pColl->xCmp) ){ + pColl = sqlite3GetCollSeq(pParse, enc, pColl, zName); + } + + return pColl; +} + /* During the search for the best function definition, this procedure ** is called to test how well the function passed as the first argument ** matches the request for a function with nArg arguments in a system @@ -254,12 +288,13 @@ static int matchQuality( u8 enc /* Desired text encoding */ ){ int match; - - /* nArg of -2 is a special case */ - if( nArg==(-2) ) return (p->xSFunc==0) ? 0 : FUNC_PERFECT_MATCH; + assert( p->nArg>=-1 ); /* Wrong number of arguments means "no match" */ - if( p->nArg!=nArg && p->nArg>=0 ) return 0; + if( p->nArg!=nArg ){ + if( nArg==(-2) ) return (p->xSFunc==0) ? 0 : FUNC_PERFECT_MATCH; + if( p->nArg>=0 ) return 0; + } /* Give a better score to a function with a specific number of arguments ** than to function that accepts any number of arguments. */ |