diff options
Diffstat (limited to 'src/func.c')
| -rw-r--r-- | src/func.c | 1087 |
1 files changed, 897 insertions, 190 deletions
diff --git a/src/func.c b/src/func.c index 48b5f5f19..58ef4fef9 100644 --- a/src/func.c +++ b/src/func.c @@ -97,6 +97,18 @@ static void typeofFunc( sqlite3_result_text(context, azType[i], -1, SQLITE_STATIC); } +/* subtype(X) +** +** Return the subtype of X +*/ +static void subtypeFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + UNUSED_PARAMETER(argc); + sqlite3_result_int(context, sqlite3_value_subtype(argv[0])); +} /* ** Implementation of the length() function @@ -138,10 +150,46 @@ static void lengthFunc( } /* +** Implementation of the octet_length() function +*/ +static void bytelengthFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + assert( argc==1 ); + UNUSED_PARAMETER(argc); + switch( sqlite3_value_type(argv[0]) ){ + case SQLITE_BLOB: { + sqlite3_result_int(context, sqlite3_value_bytes(argv[0])); + break; + } + case SQLITE_INTEGER: + case SQLITE_FLOAT: { + i64 m = sqlite3_context_db_handle(context)->enc<=SQLITE_UTF8 ? 1 : 2; + sqlite3_result_int64(context, sqlite3_value_bytes(argv[0])*m); + break; + } + case SQLITE_TEXT: { + if( sqlite3_value_encoding(argv[0])<=SQLITE_UTF8 ){ + sqlite3_result_int(context, sqlite3_value_bytes(argv[0])); + }else{ + sqlite3_result_int(context, sqlite3_value_bytes16(argv[0])); + } + break; + } + default: { + sqlite3_result_null(context); + break; + } + } +} + +/* ** Implementation of the abs() function. ** ** IMP: R-23979-26855 The abs(X) function returns the absolute value of -** the numeric argument X. +** the numeric argument X. */ static void absFunc(sqlite3_context *context, int argc, sqlite3_value **argv){ assert( argc==1 ); @@ -158,7 +206,7 @@ static void absFunc(sqlite3_context *context, int argc, sqlite3_value **argv){ return; } iVal = -iVal; - } + } sqlite3_result_int64(context, iVal); break; } @@ -258,7 +306,7 @@ endInstrOOM: } /* -** Implementation of the printf() function. +** Implementation of the printf() (a.k.a. format()) SQL function. */ static void printfFunc( sqlite3_context *context, @@ -410,10 +458,10 @@ static void roundFunc(sqlite3_context *context, int argc, sqlite3_value **argv){ */ if( r<-4503599627370496.0 || r>+4503599627370496.0 ){ /* The value has no fractional part so there is nothing to round */ - }else if( n==0 ){ + }else if( n==0 ){ r = (double)((sqlite_int64)(r+(r<0?-0.5:+0.5))); }else{ - zBuf = sqlite3_mprintf("%.*f",n,r); + zBuf = sqlite3_mprintf("%!.*f",n,r); if( zBuf==0 ){ sqlite3_result_error_nomem(context); return; @@ -503,7 +551,7 @@ static void lowerFunc(sqlite3_context *context, int argc, sqlite3_value **argv){ #define noopFunc versionFunc /* Substitute function - never called */ /* -** Implementation of random(). Return a random integer. +** Implementation of random(). Return a random integer. */ static void randomFunc( sqlite3_context *context, @@ -514,11 +562,11 @@ static void randomFunc( UNUSED_PARAMETER2(NotUsed, NotUsed2); sqlite3_randomness(sizeof(r), &r); if( r<0 ){ - /* We need to prevent a random number of 0x8000000000000000 + /* We need to prevent a random number of 0x8000000000000000 ** (or -9223372036854775808) since when you do abs() of that ** number of you get the same value back again. To do this ** in a way that is testable, mask the sign bit off of negative - ** values, resulting in a positive value. Then take the + ** values, resulting in a positive value. Then take the ** 2s complement of that positive value. The end result can ** therefore be no less than -9223372036854775807. */ @@ -556,8 +604,8 @@ static void randomBlob( ** value is the same as the sqlite3_last_insert_rowid() API function. */ static void last_insert_rowid( - sqlite3_context *context, - int NotUsed, + sqlite3_context *context, + int NotUsed, sqlite3_value **NotUsed2 ){ sqlite3 *db = sqlite3_context_db_handle(context); @@ -571,9 +619,9 @@ static void last_insert_rowid( /* ** Implementation of the changes() SQL function. ** -** IMP: R-62073-11209 The changes() SQL function is a wrapper -** around the sqlite3_changes() C/C++ function and hence follows the same -** rules for counting changes. +** IMP: R-32760-32347 The changes() SQL function is a wrapper +** around the sqlite3_changes64() C/C++ function and hence follows the +** same rules for counting changes. */ static void changes( sqlite3_context *context, @@ -582,12 +630,12 @@ static void changes( ){ sqlite3 *db = sqlite3_context_db_handle(context); UNUSED_PARAMETER2(NotUsed, NotUsed2); - sqlite3_result_int(context, sqlite3_changes(db)); + sqlite3_result_int64(context, sqlite3_changes64(db)); } /* ** Implementation of the total_changes() SQL function. The return value is -** the same as the sqlite3_total_changes() API function. +** the same as the sqlite3_total_changes64() API function. */ static void total_changes( sqlite3_context *context, @@ -596,9 +644,9 @@ static void total_changes( ){ sqlite3 *db = sqlite3_context_db_handle(context); UNUSED_PARAMETER2(NotUsed, NotUsed2); - /* IMP: R-52756-41993 This function is a wrapper around the - ** sqlite3_total_changes() C/C++ interface. */ - sqlite3_result_int(context, sqlite3_total_changes(db)); + /* IMP: R-11217-42568 This function is a wrapper around the + ** sqlite3_total_changes64() C/C++ interface. */ + sqlite3_result_int64(context, sqlite3_total_changes64(db)); } /* @@ -613,7 +661,7 @@ struct compareInfo { /* ** For LIKE and GLOB matching on EBCDIC machines, assume that every -** character is exactly one byte in size. Also, provde the Utf8Read() +** character is exactly one byte in size. Also, provide the Utf8Read() ** macro for fast reading of the next character in the common case where ** the next character is ASCII. */ @@ -665,7 +713,7 @@ static const struct compareInfo likeInfoAlt = { '%', '_', 0, 0 }; ** it the last character in the list. ** ** Like matching rules: -** +** ** '%' Matches any sequence of zero or more characters ** *** '_' Matches any one character @@ -688,13 +736,14 @@ static int patternCompare( u32 matchAll = pInfo->matchAll; /* "*" or "%" */ u8 noCase = pInfo->noCase; /* True if uppercase==lowercase */ const u8 *zEscaped = 0; /* One past the last escaped input char */ - + while( (c = Utf8Read(zPattern))!=0 ){ if( c==matchAll ){ /* Match "*" */ /* Skip over multiple "*" characters in the pattern. If there ** are also "?" characters, skip those as well, but consume a ** single character of the input string for each "?" skipped */ - while( (c=Utf8Read(zPattern)) == matchAll || c == matchOne ){ + while( (c=Utf8Read(zPattern)) == matchAll + || (c == matchOne && matchOne!=0) ){ if( c==matchOne && sqlite3Utf8Read(&zString)==0 ){ return SQLITE_NOWILDCARDMATCH; } @@ -727,7 +776,7 @@ static int patternCompare( ** c but in the other case and search the input string for either ** c or cx. */ - if( c<=0x80 ){ + if( c<0x80 ){ char zStop[3]; int bMatch; if( noCase ){ @@ -810,7 +859,13 @@ static int patternCompare( ** non-zero if there is no match. */ int sqlite3_strglob(const char *zGlobPattern, const char *zString){ - return patternCompare((u8*)zGlobPattern, (u8*)zString, &globInfo, '['); + if( zString==0 ){ + return zGlobPattern!=0; + }else if( zGlobPattern==0 ){ + return 1; + }else { + return patternCompare((u8*)zGlobPattern, (u8*)zString, &globInfo, '['); + } } /* @@ -818,7 +873,13 @@ int sqlite3_strglob(const char *zGlobPattern, const char *zString){ ** a miss - like strcmp(). */ int sqlite3_strlike(const char *zPattern, const char *zStr, unsigned int esc){ - return patternCompare((u8*)zPattern, (u8*)zStr, &likeInfoNorm, esc); + if( zStr==0 ){ + return zPattern!=0; + }else if( zPattern==0 ){ + return 1; + }else{ + return patternCompare((u8*)zPattern, (u8*)zStr, &likeInfoNorm, esc); + } } /* @@ -833,7 +894,7 @@ int sqlite3_like_count = 0; /* ** Implementation of the like() SQL function. This function implements -** the build-in LIKE operator. The first argument to the function is the +** the built-in LIKE operator. The first argument to the function is the ** pattern and the second argument is the string. So, the SQL statements: ** ** A LIKE B @@ -844,8 +905,8 @@ int sqlite3_like_count = 0; ** the GLOB operator. */ static void likeFunc( - sqlite3_context *context, - int argc, + sqlite3_context *context, + int argc, sqlite3_value **argv ){ const unsigned char *zA, *zB; @@ -884,7 +945,7 @@ static void likeFunc( const unsigned char *zEsc = sqlite3_value_text(argv[2]); if( zEsc==0 ) return; if( sqlite3Utf8CharLen((char*)zEsc, -1)!=1 ){ - sqlite3_result_error(context, + sqlite3_result_error(context, "ESCAPE expression must be a single character", -1); return; } @@ -997,8 +1058,8 @@ static void compileoptionusedFunc( #endif /* SQLITE_OMIT_COMPILEOPTION_DIAGS */ /* -** Implementation of the sqlite_compileoption_get() function. -** The result is a string that identifies the compiler options +** Implementation of the sqlite_compileoption_get() function. +** The result is a string that identifies the compiler options ** used to build SQLite. */ #ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS @@ -1022,43 +1083,46 @@ static void compileoptiongetFunc( ** digits. */ static const char hexdigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' + '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; /* -** Implementation of the QUOTE() function. This function takes a single -** argument. If the argument is numeric, the return value is the same as -** the argument. If the argument is NULL, the return value is the string -** "NULL". Otherwise, the argument is enclosed in single quotes with -** single-quote escapes. +** Append to pStr text that is the SQL literal representation of the +** value contained in pValue. */ -static void quoteFunc(sqlite3_context *context, int argc, sqlite3_value **argv){ - assert( argc==1 ); - UNUSED_PARAMETER(argc); - switch( sqlite3_value_type(argv[0]) ){ +void sqlite3QuoteValue(StrAccum *pStr, sqlite3_value *pValue){ + /* As currently implemented, the string must be initially empty. + ** we might relax this requirement in the future, but that will + ** require enhancements to the implementation. */ + assert( pStr!=0 && pStr->nChar==0 ); + + switch( sqlite3_value_type(pValue) ){ case SQLITE_FLOAT: { double r1, r2; - char zBuf[50]; - r1 = sqlite3_value_double(argv[0]); - sqlite3_snprintf(sizeof(zBuf), zBuf, "%!.15g", r1); - sqlite3AtoF(zBuf, &r2, 20, SQLITE_UTF8); - if( r1!=r2 ){ - sqlite3_snprintf(sizeof(zBuf), zBuf, "%!.20e", r1); + const char *zVal; + r1 = sqlite3_value_double(pValue); + sqlite3_str_appendf(pStr, "%!.15g", r1); + zVal = sqlite3_str_value(pStr); + if( zVal ){ + sqlite3AtoF(zVal, &r2, pStr->nChar, SQLITE_UTF8); + if( r1!=r2 ){ + sqlite3_str_reset(pStr); + sqlite3_str_appendf(pStr, "%!.20e", r1); + } } - sqlite3_result_text(context, zBuf, -1, SQLITE_TRANSIENT); break; } case SQLITE_INTEGER: { - sqlite3_result_value(context, argv[0]); + sqlite3_str_appendf(pStr, "%lld", sqlite3_value_int64(pValue)); break; } case SQLITE_BLOB: { - char *zText = 0; - char const *zBlob = sqlite3_value_blob(argv[0]); - int nBlob = sqlite3_value_bytes(argv[0]); - assert( zBlob==sqlite3_value_blob(argv[0]) ); /* No encoding change */ - zText = (char *)contextMalloc(context, (2*(i64)nBlob)+4); - if( zText ){ + char const *zBlob = sqlite3_value_blob(pValue); + i64 nBlob = sqlite3_value_bytes(pValue); + assert( zBlob==sqlite3_value_blob(pValue) ); /* No encoding change */ + sqlite3StrAccumEnlarge(pStr, nBlob*2 + 4); + if( pStr->accError==0 ){ + char *zText = pStr->zText; int i; for(i=0; i<nBlob; i++){ zText[(i*2)+2] = hexdigits[(zBlob[i]>>4)&0x0F]; @@ -1068,45 +1132,51 @@ static void quoteFunc(sqlite3_context *context, int argc, sqlite3_value **argv){ zText[(nBlob*2)+3] = '\0'; zText[0] = 'X'; zText[1] = '\''; - sqlite3_result_text(context, zText, -1, SQLITE_TRANSIENT); - sqlite3_free(zText); + pStr->nChar = nBlob*2 + 3; } break; } case SQLITE_TEXT: { - int i,j; - u64 n; - const unsigned char *zArg = sqlite3_value_text(argv[0]); - char *z; - - if( zArg==0 ) return; - for(i=0, n=0; zArg[i]; i++){ if( zArg[i]=='\'' ) n++; } - z = contextMalloc(context, ((i64)i)+((i64)n)+3); - if( z ){ - z[0] = '\''; - for(i=0, j=1; zArg[i]; i++){ - z[j++] = zArg[i]; - if( zArg[i]=='\'' ){ - z[j++] = '\''; - } - } - z[j++] = '\''; - z[j] = 0; - sqlite3_result_text(context, z, j, sqlite3_free); - } + const unsigned char *zArg = sqlite3_value_text(pValue); + sqlite3_str_appendf(pStr, "%Q", zArg); break; } default: { - assert( sqlite3_value_type(argv[0])==SQLITE_NULL ); - sqlite3_result_text(context, "NULL", 4, SQLITE_STATIC); + assert( sqlite3_value_type(pValue)==SQLITE_NULL ); + sqlite3_str_append(pStr, "NULL", 4); break; } } } /* +** Implementation of the QUOTE() function. +** +** The quote(X) function returns the text of an SQL literal which is the +** value of its argument suitable for inclusion into an SQL statement. +** Strings are surrounded by single-quotes with escapes on interior quotes +** as needed. BLOBs are encoded as hexadecimal literals. Strings with +** embedded NUL characters cannot be represented as string literals in SQL +** and hence the returned string literal is truncated prior to the first NUL. +*/ +static void quoteFunc(sqlite3_context *context, int argc, sqlite3_value **argv){ + sqlite3_str str; + sqlite3 *db = sqlite3_context_db_handle(context); + assert( argc==1 ); + UNUSED_PARAMETER(argc); + sqlite3StrAccumInit(&str, db, 0, 0, db->aLimit[SQLITE_LIMIT_LENGTH]); + sqlite3QuoteValue(&str,argv[0]); + sqlite3_result_text(context, sqlite3StrAccumFinish(&str), str.nChar, + SQLITE_DYNAMIC); + if( str.accError!=SQLITE_OK ){ + sqlite3_result_null(context); + sqlite3_result_error_code(context, str.accError); + } +} + +/* ** The unicode() function. Return the integer unicode code-point value -** for the first character of the input string. +** for the first character of the input string. */ static void unicodeFunc( sqlite3_context *context, @@ -1157,6 +1227,7 @@ static void charFunc( *zOut++ = 0x80 + (u8)(c & 0x3F); } \ } + *zOut = 0; sqlite3_result_text64(context, (char*)z, zOut-z, sqlite3_free, SQLITE_UTF8); } @@ -1185,11 +1256,102 @@ static void hexFunc( *(z++) = hexdigits[c&0xf]; } *z = 0; - sqlite3_result_text(context, zHex, n*2, sqlite3_free); + sqlite3_result_text64(context, zHex, (u64)(z-zHex), + sqlite3_free, SQLITE_UTF8); + } +} + +/* +** Buffer zStr contains nStr bytes of utf-8 encoded text. Return 1 if zStr +** contains character ch, or 0 if it does not. +*/ +static int strContainsChar(const u8 *zStr, int nStr, u32 ch){ + const u8 *zEnd = &zStr[nStr]; + const u8 *z = zStr; + while( z<zEnd ){ + u32 tst = Utf8Read(z); + if( tst==ch ) return 1; } + return 0; } /* +** The unhex() function. This function may be invoked with either one or +** two arguments. In both cases the first argument is interpreted as text +** a text value containing a set of pairs of hexadecimal digits which are +** decoded and returned as a blob. +** +** If there is only a single argument, then it must consist only of an +** even number of hexadecimal digits. Otherwise, return NULL. +** +** Or, if there is a second argument, then any character that appears in +** the second argument is also allowed to appear between pairs of hexadecimal +** digits in the first argument. If any other character appears in the +** first argument, or if one of the allowed characters appears between +** two hexadecimal digits that make up a single byte, NULL is returned. +** +** The following expressions are all true: +** +** unhex('ABCD') IS x'ABCD' +** unhex('AB CD') IS NULL +** unhex('AB CD', ' ') IS x'ABCD' +** unhex('A BCD', ' ') IS NULL +*/ +static void unhexFunc( + sqlite3_context *pCtx, + int argc, + sqlite3_value **argv +){ + const u8 *zPass = (const u8*)""; + int nPass = 0; + const u8 *zHex = sqlite3_value_text(argv[0]); + int nHex = sqlite3_value_bytes(argv[0]); +#ifdef SQLITE_DEBUG + const u8 *zEnd = zHex ? &zHex[nHex] : 0; +#endif + u8 *pBlob = 0; + u8 *p = 0; + + assert( argc==1 || argc==2 ); + if( argc==2 ){ + zPass = sqlite3_value_text(argv[1]); + nPass = sqlite3_value_bytes(argv[1]); + } + if( !zHex || !zPass ) return; + + p = pBlob = contextMalloc(pCtx, (nHex/2)+1); + if( pBlob ){ + u8 c; /* Most significant digit of next byte */ + u8 d; /* Least significant digit of next byte */ + + while( (c = *zHex)!=0x00 ){ + while( !sqlite3Isxdigit(c) ){ + u32 ch = Utf8Read(zHex); + assert( zHex<=zEnd ); + if( !strContainsChar(zPass, nPass, ch) ) goto unhex_null; + c = *zHex; + if( c==0x00 ) goto unhex_done; + } + zHex++; + assert( *zEnd==0x00 ); + assert( zHex<=zEnd ); + d = *(zHex++); + if( !sqlite3Isxdigit(d) ) goto unhex_null; + *(p++) = (sqlite3HexToInt(c)<<4) | sqlite3HexToInt(d); + } + } + + unhex_done: + sqlite3_result_blob(pCtx, pBlob, (p - pBlob), sqlite3_free); + return; + + unhex_null: + sqlite3_free(pBlob); + return; +} + + +/* ** The zeroblob(N) function returns a zero-filled blob of size N bytes. */ static void zeroblobFunc( @@ -1262,7 +1424,7 @@ static void replaceFunc( if( zOut==0 ){ return; } - loopLimit = nStr - nPattern; + loopLimit = nStr - nPattern; cntExpand = 0; for(i=j=0; i<=loopLimit; i++){ if( zStr[i]!=zPattern[0] || memcmp(&zStr[i], zPattern, nPattern) ){ @@ -1315,10 +1477,10 @@ static void trimFunc( ){ const unsigned char *zIn; /* Input string */ const unsigned char *zCharSet; /* Set of characters to trim */ - int nIn; /* Number of bytes in input */ + unsigned int nIn; /* Number of bytes in input */ int flags; /* 1: trimleft 2: trimright 3: trim */ int i; /* Loop counter */ - unsigned char *aLen = 0; /* Length of each character in zCharSet */ + unsigned int *aLen = 0; /* Length of each character in zCharSet */ unsigned char **azChar = 0; /* Individual characters in zCharSet */ int nChar; /* Number of characters in zCharSet */ @@ -1327,13 +1489,13 @@ static void trimFunc( } zIn = sqlite3_value_text(argv[0]); if( zIn==0 ) return; - nIn = sqlite3_value_bytes(argv[0]); + nIn = (unsigned)sqlite3_value_bytes(argv[0]); assert( zIn==sqlite3_value_text(argv[0]) ); if( argc==1 ){ - static const unsigned char lenOne[] = { 1 }; + static const unsigned lenOne[] = { 1 }; static unsigned char * const azOne[] = { (u8*)" " }; nChar = 1; - aLen = (u8*)lenOne; + aLen = (unsigned*)lenOne; azChar = (unsigned char **)azOne; zCharSet = 0; }else if( (zCharSet = sqlite3_value_text(argv[1]))==0 ){ @@ -1344,15 +1506,16 @@ static void trimFunc( SQLITE_SKIP_UTF8(z); } if( nChar>0 ){ - azChar = contextMalloc(context, ((i64)nChar)*(sizeof(char*)+1)); + azChar = contextMalloc(context, + ((i64)nChar)*(sizeof(char*)+sizeof(unsigned))); if( azChar==0 ){ return; } - aLen = (unsigned char*)&azChar[nChar]; + aLen = (unsigned*)&azChar[nChar]; for(z=zCharSet, nChar=0; *z; nChar++){ azChar[nChar] = (unsigned char *)z; SQLITE_SKIP_UTF8(z); - aLen[nChar] = (u8)(z - azChar[nChar]); + aLen[nChar] = (unsigned)(z - azChar[nChar]); } } } @@ -1360,7 +1523,7 @@ static void trimFunc( flags = SQLITE_PTR_TO_INT(sqlite3_user_data(context)); if( flags & 1 ){ while( nIn>0 ){ - int len = 0; + unsigned int len = 0; for(i=0; i<nChar; i++){ len = aLen[i]; if( len<=nIn && memcmp(zIn, azChar[i], len)==0 ) break; @@ -1372,7 +1535,7 @@ static void trimFunc( } if( flags & 2 ){ while( nIn>0 ){ - int len = 0; + unsigned int len = 0; for(i=0; i<nChar; i++){ len = aLen[i]; if( len<=nIn && memcmp(&zIn[nIn-len],azChar[i],len)==0 ) break; @@ -1388,12 +1551,87 @@ static void trimFunc( sqlite3_result_text(context, (char*)zIn, nIn, SQLITE_TRANSIENT); } +/* The core implementation of the CONCAT(...) and CONCAT_WS(SEP,...) +** functions. +** +** Return a string value that is the concatenation of all non-null +** entries in argv[]. Use zSep as the separator. +*/ +static void concatFuncCore( + sqlite3_context *context, + int argc, + sqlite3_value **argv, + int nSep, + const char *zSep +){ + i64 j, k, n = 0; + int i; + char *z; + for(i=0; i<argc; i++){ + n += sqlite3_value_bytes(argv[i]); + } + n += (argc-1)*nSep; + z = sqlite3_malloc64(n+1); + if( z==0 ){ + sqlite3_result_error_nomem(context); + return; + } + j = 0; + for(i=0; i<argc; i++){ + k = sqlite3_value_bytes(argv[i]); + if( k>0 ){ + const char *v = (const char*)sqlite3_value_text(argv[i]); + if( v!=0 ){ + if( j>0 && nSep>0 ){ + memcpy(&z[j], zSep, nSep); + j += nSep; + } + memcpy(&z[j], v, k); + j += k; + } + } + } + z[j] = 0; + assert( j<=n ); + sqlite3_result_text64(context, z, j, sqlite3_free, SQLITE_UTF8); +} + +/* +** The CONCAT(...) function. Generate a string result that is the +** concatentation of all non-null arguments. +*/ +static void concatFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + concatFuncCore(context, argc, argv, 0, ""); +} + +/* +** The CONCAT_WS(separator, ...) function. +** +** Generate a string that is the concatenation of 2nd through the Nth +** argument. Use the first argument (which must be non-NULL) as the +** separator. +*/ +static void concatwsFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + int nSep = sqlite3_value_bytes(argv[0]); + const char *zSep = (const char*)sqlite3_value_text(argv[0]); + if( zSep==0 ) return; + concatFuncCore(context, argc-1, argv+1, nSep, zSep); +} + #ifdef SQLITE_ENABLE_UNKNOWN_SQL_FUNCTION /* ** The "unknown" function is automatically substituted in place of ** any unrecognized function name when doing an EXPLAIN or EXPLAIN QUERY PLAN -** when the SQLITE_ENABLE_UNKNOWN_FUNCTION compile-time option is used. +** when the SQLITE_ENABLE_UNKNOWN_SQL_FUNCTION compile-time option is used. ** When the "sqlite3" command-line shell is built using this functionality, ** that allows an EXPLAIN or EXPLAIN QUERY PLAN for complex queries ** involving application-defined functions to be examined in a generic @@ -1405,6 +1643,9 @@ static void unknownFunc( sqlite3_value **argv ){ /* no-op */ + (void)context; + (void)argc; + (void)argv; } #endif /*SQLITE_ENABLE_UNKNOWN_SQL_FUNCTION*/ @@ -1418,7 +1659,7 @@ static void unknownFunc( ** Compute the soundex encoding of a word. ** ** IMP: R-59782-00072 The soundex(X) function returns a string that is the -** soundex encoding of the string X. +** soundex encoding of the string X. */ static void soundexFunc( sqlite3_context *context, @@ -1506,14 +1747,69 @@ static void loadExt(sqlite3_context *context, int argc, sqlite3_value **argv){ */ typedef struct SumCtx SumCtx; struct SumCtx { - double rSum; /* Floating point sum */ - i64 iSum; /* Integer sum */ + double rSum; /* Running sum as as a double */ + double rErr; /* Error term for Kahan-Babushka-Neumaier summation */ + i64 iSum; /* Running sum as a signed integer */ i64 cnt; /* Number of elements summed */ - u8 overflow; /* True if integer overflow seen */ - u8 approx; /* True if non-integer value was input to the sum */ + u8 approx; /* True if any non-integer value was input to the sum */ + u8 ovrfl; /* Integer overflow seen */ }; /* +** Do one step of the Kahan-Babushka-Neumaier summation. +** +** https://en.wikipedia.org/wiki/Kahan_summation_algorithm +** +** Variables are marked "volatile" to defeat c89 x86 floating point +** optimizations can mess up this algorithm. +*/ +static void kahanBabuskaNeumaierStep( + volatile SumCtx *pSum, + volatile double r +){ + volatile double s = pSum->rSum; + volatile double t = s + r; + if( fabs(s) > fabs(r) ){ + pSum->rErr += (s - t) + r; + }else{ + pSum->rErr += (r - t) + s; + } + pSum->rSum = t; +} + +/* +** Add a (possibly large) integer to the running sum. +*/ +static void kahanBabuskaNeumaierStepInt64(volatile SumCtx *pSum, i64 iVal){ + if( iVal<=-4503599627370496LL || iVal>=+4503599627370496LL ){ + i64 iBig, iSm; + iSm = iVal % 16384; + iBig = iVal - iSm; + kahanBabuskaNeumaierStep(pSum, iBig); + kahanBabuskaNeumaierStep(pSum, iSm); + }else{ + kahanBabuskaNeumaierStep(pSum, (double)iVal); + } +} + +/* +** Initialize the Kahan-Babaska-Neumaier sum from a 64-bit integer +*/ +static void kahanBabuskaNeumaierInit( + volatile SumCtx *p, + i64 iVal +){ + if( iVal<=-4503599627370496LL || iVal>=+4503599627370496LL ){ + i64 iSm = iVal % 16384; + p->rSum = (double)(iVal - iSm); + p->rErr = (double)iSm; + }else{ + p->rSum = (double)iVal; + p->rErr = 0.0; + } +} + +/* ** Routines used to compute the sum, average, and total. ** ** The SUM() function follows the (broken) SQL standard which means @@ -1532,15 +1828,29 @@ static void sumStep(sqlite3_context *context, int argc, sqlite3_value **argv){ type = sqlite3_value_numeric_type(argv[0]); if( p && type!=SQLITE_NULL ){ p->cnt++; - if( type==SQLITE_INTEGER ){ - i64 v = sqlite3_value_int64(argv[0]); - p->rSum += v; - if( (p->approx|p->overflow)==0 && sqlite3AddInt64(&p->iSum, v) ){ - p->approx = p->overflow = 1; + if( p->approx==0 ){ + if( type!=SQLITE_INTEGER ){ + kahanBabuskaNeumaierInit(p, p->iSum); + p->approx = 1; + kahanBabuskaNeumaierStep(p, sqlite3_value_double(argv[0])); + }else{ + i64 x = p->iSum; + if( sqlite3AddInt64(&x, sqlite3_value_int64(argv[0]))==0 ){ + p->iSum = x; + }else{ + p->ovrfl = 1; + kahanBabuskaNeumaierInit(p, p->iSum); + p->approx = 1; + kahanBabuskaNeumaierStepInt64(p, sqlite3_value_int64(argv[0])); + } } }else{ - p->rSum += sqlite3_value_double(argv[0]); - p->approx = 1; + if( type==SQLITE_INTEGER ){ + kahanBabuskaNeumaierStepInt64(p, sqlite3_value_int64(argv[0])); + }else{ + p->ovrfl = 0; + kahanBabuskaNeumaierStep(p, sqlite3_value_double(argv[0])); + } } } } @@ -1557,13 +1867,18 @@ static void sumInverse(sqlite3_context *context, int argc, sqlite3_value**argv){ if( ALWAYS(p) && type!=SQLITE_NULL ){ assert( p->cnt>0 ); p->cnt--; - assert( type==SQLITE_INTEGER || p->approx ); - if( type==SQLITE_INTEGER && p->approx==0 ){ - i64 v = sqlite3_value_int64(argv[0]); - p->rSum -= v; - p->iSum -= v; + if( !p->approx ){ + p->iSum -= sqlite3_value_int64(argv[0]); + }else if( type==SQLITE_INTEGER ){ + i64 iVal = sqlite3_value_int64(argv[0]); + if( iVal!=SMALLEST_INT64 ){ + kahanBabuskaNeumaierStepInt64(p, -iVal); + }else{ + kahanBabuskaNeumaierStepInt64(p, LARGEST_INT64); + kahanBabuskaNeumaierStepInt64(p, 1); + } }else{ - p->rSum -= sqlite3_value_double(argv[0]); + kahanBabuskaNeumaierStep(p, -sqlite3_value_double(argv[0])); } } } @@ -1574,10 +1889,14 @@ static void sumFinalize(sqlite3_context *context){ SumCtx *p; p = sqlite3_aggregate_context(context, 0); if( p && p->cnt>0 ){ - if( p->overflow ){ - sqlite3_result_error(context,"integer overflow",-1); - }else if( p->approx ){ - sqlite3_result_double(context, p->rSum); + if( p->approx ){ + if( p->ovrfl ){ + sqlite3_result_error(context,"integer overflow",-1); + }else if( !sqlite3IsNaN(p->rErr) ){ + sqlite3_result_double(context, p->rSum+p->rErr); + }else{ + sqlite3_result_double(context, p->rSum); + } }else{ sqlite3_result_int64(context, p->iSum); } @@ -1587,14 +1906,29 @@ static void avgFinalize(sqlite3_context *context){ SumCtx *p; p = sqlite3_aggregate_context(context, 0); if( p && p->cnt>0 ){ - sqlite3_result_double(context, p->rSum/(double)p->cnt); + double r; + if( p->approx ){ + r = p->rSum; + if( !sqlite3IsNaN(p->rErr) ) r += p->rErr; + }else{ + r = (double)(p->iSum); + } + sqlite3_result_double(context, r/(double)p->cnt); } } static void totalFinalize(sqlite3_context *context){ SumCtx *p; + double r = 0.0; p = sqlite3_aggregate_context(context, 0); - /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */ - sqlite3_result_double(context, p ? p->rSum : (double)0); + if( p ){ + if( p->approx ){ + r = p->rSum; + if( !sqlite3IsNaN(p->rErr) ) r += p->rErr; + }else{ + r = (double)(p->iSum); + } + } + sqlite3_result_double(context, r); } /* @@ -1621,13 +1955,13 @@ static void countStep(sqlite3_context *context, int argc, sqlite3_value **argv){ #ifndef SQLITE_OMIT_DEPRECATED /* The sqlite3_aggregate_count() function is deprecated. But just to make - ** sure it still operates correctly, verify that its count agrees with our + ** sure it still operates correctly, verify that its count agrees with our ** internal count when using count(*) and when the total count can be ** expressed as a 32-bit integer. */ assert( argc==1 || p==0 || p->n>0x7fffffff || p->bInverse || p->n==sqlite3_aggregate_count(context) ); #endif -} +} static void countFinalize(sqlite3_context *context){ CountCtx *p; p = sqlite3_aggregate_context(context, 0); @@ -1644,7 +1978,7 @@ static void countInverse(sqlite3_context *ctx, int argc, sqlite3_value **argv){ p->bInverse = 1; #endif } -} +} #else # define countInverse 0 #endif /* SQLITE_OMIT_WINDOWFUNC */ @@ -1653,8 +1987,8 @@ static void countInverse(sqlite3_context *ctx, int argc, sqlite3_value **argv){ ** Routines to implement min() and max() aggregate functions. */ static void minmaxStep( - sqlite3_context *context, - int NotUsed, + sqlite3_context *context, + int NotUsed, sqlite3_value **argv ){ Mem *pArg = (Mem *)argv[0]; @@ -1713,97 +2047,168 @@ static void minMaxFinalize(sqlite3_context *context){ /* ** group_concat(EXPR, ?SEPARATOR?) +** string_agg(EXPR, SEPARATOR) +** +** The SEPARATOR goes before the EXPR string. This is tragic. The +** groupConcatInverse() implementation would have been easier if the +** SEPARATOR were appended after EXPR. And the order is undocumented, +** so we could change it, in theory. But the old behavior has been +** around for so long that we dare not, for fear of breaking something. */ +typedef struct { + StrAccum str; /* The accumulated concatenation */ +#ifndef SQLITE_OMIT_WINDOWFUNC + int nAccum; /* Number of strings presently concatenated */ + int nFirstSepLength; /* Used to detect separator length change */ + /* If pnSepLengths!=0, refs an array of inter-string separator lengths, + ** stored as actually incorporated into presently accumulated result. + ** (Hence, its slots in use number nAccum-1 between method calls.) + ** If pnSepLengths==0, nFirstSepLength is the length used throughout. + */ + int *pnSepLengths; +#endif +} GroupConcatCtx; + static void groupConcatStep( sqlite3_context *context, int argc, sqlite3_value **argv ){ const char *zVal; - StrAccum *pAccum; + GroupConcatCtx *pGCC; const char *zSep; int nVal, nSep; assert( argc==1 || argc==2 ); if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return; - pAccum = (StrAccum*)sqlite3_aggregate_context(context, sizeof(*pAccum)); - - if( pAccum ){ + pGCC = (GroupConcatCtx*)sqlite3_aggregate_context(context, sizeof(*pGCC)); + if( pGCC ){ sqlite3 *db = sqlite3_context_db_handle(context); - int firstTerm = pAccum->mxAlloc==0; - pAccum->mxAlloc = db->aLimit[SQLITE_LIMIT_LENGTH]; - if( !firstTerm ){ - if( argc==2 ){ - zSep = (char*)sqlite3_value_text(argv[1]); - nSep = sqlite3_value_bytes(argv[1]); - }else{ - zSep = ","; - nSep = 1; + int firstTerm = pGCC->str.mxAlloc==0; + pGCC->str.mxAlloc = db->aLimit[SQLITE_LIMIT_LENGTH]; + if( argc==1 ){ + if( !firstTerm ){ + sqlite3_str_appendchar(&pGCC->str, 1, ','); + } +#ifndef SQLITE_OMIT_WINDOWFUNC + else{ + pGCC->nFirstSepLength = 1; + } +#endif + }else if( !firstTerm ){ + zSep = (char*)sqlite3_value_text(argv[1]); + nSep = sqlite3_value_bytes(argv[1]); + if( zSep ){ + sqlite3_str_append(&pGCC->str, zSep, nSep); } - if( zSep ) sqlite3_str_append(pAccum, zSep, nSep); +#ifndef SQLITE_OMIT_WINDOWFUNC + else{ + nSep = 0; + } + if( nSep != pGCC->nFirstSepLength || pGCC->pnSepLengths != 0 ){ + int *pnsl = pGCC->pnSepLengths; + if( pnsl == 0 ){ + /* First separator length variation seen, start tracking them. */ + pnsl = (int*)sqlite3_malloc64((pGCC->nAccum+1) * sizeof(int)); + if( pnsl!=0 ){ + int i = 0, nA = pGCC->nAccum-1; + while( i<nA ) pnsl[i++] = pGCC->nFirstSepLength; + } + }else{ + pnsl = (int*)sqlite3_realloc64(pnsl, pGCC->nAccum * sizeof(int)); + } + if( pnsl!=0 ){ + if( ALWAYS(pGCC->nAccum>0) ){ + pnsl[pGCC->nAccum-1] = nSep; + } + pGCC->pnSepLengths = pnsl; + }else{ + sqlite3StrAccumSetError(&pGCC->str, SQLITE_NOMEM); + } + } +#endif } +#ifndef SQLITE_OMIT_WINDOWFUNC + else{ + pGCC->nFirstSepLength = sqlite3_value_bytes(argv[1]); + } + pGCC->nAccum += 1; +#endif zVal = (char*)sqlite3_value_text(argv[0]); nVal = sqlite3_value_bytes(argv[0]); - if( zVal ) sqlite3_str_append(pAccum, zVal, nVal); + if( zVal ) sqlite3_str_append(&pGCC->str, zVal, nVal); } } + #ifndef SQLITE_OMIT_WINDOWFUNC static void groupConcatInverse( sqlite3_context *context, int argc, sqlite3_value **argv ){ - int n; - StrAccum *pAccum; + GroupConcatCtx *pGCC; assert( argc==1 || argc==2 ); + (void)argc; /* Suppress unused parameter warning */ if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return; - pAccum = (StrAccum*)sqlite3_aggregate_context(context, sizeof(*pAccum)); - /* pAccum is always non-NULL since groupConcatStep() will have always - ** run frist to initialize it */ - if( ALWAYS(pAccum) ){ - n = sqlite3_value_bytes(argv[0]); - if( argc==2 ){ - n += sqlite3_value_bytes(argv[1]); + pGCC = (GroupConcatCtx*)sqlite3_aggregate_context(context, sizeof(*pGCC)); + /* pGCC is always non-NULL since groupConcatStep() will have always + ** run first to initialize it */ + if( ALWAYS(pGCC) ){ + int nVS; + /* Must call sqlite3_value_text() to convert the argument into text prior + ** to invoking sqlite3_value_bytes(), in case the text encoding is UTF16 */ + (void)sqlite3_value_text(argv[0]); + nVS = sqlite3_value_bytes(argv[0]); + pGCC->nAccum -= 1; + if( pGCC->pnSepLengths!=0 ){ + assert(pGCC->nAccum >= 0); + if( pGCC->nAccum>0 ){ + nVS += *pGCC->pnSepLengths; + memmove(pGCC->pnSepLengths, pGCC->pnSepLengths+1, + (pGCC->nAccum-1)*sizeof(int)); + } }else{ - n++; + /* If removing single accumulated string, harmlessly over-do. */ + nVS += pGCC->nFirstSepLength; } - if( n>=(int)pAccum->nChar ){ - pAccum->nChar = 0; + if( nVS>=(int)pGCC->str.nChar ){ + pGCC->str.nChar = 0; }else{ - pAccum->nChar -= n; - memmove(pAccum->zText, &pAccum->zText[n], pAccum->nChar); + pGCC->str.nChar -= nVS; + memmove(pGCC->str.zText, &pGCC->str.zText[nVS], pGCC->str.nChar); + } + if( pGCC->str.nChar==0 ){ + pGCC->str.mxAlloc = 0; + sqlite3_free(pGCC->pnSepLengths); + pGCC->pnSepLengths = 0; } - if( pAccum->nChar==0 ) pAccum->mxAlloc = 0; } } #else # define groupConcatInverse 0 #endif /* SQLITE_OMIT_WINDOWFUNC */ static void groupConcatFinalize(sqlite3_context *context){ - StrAccum *pAccum; - pAccum = sqlite3_aggregate_context(context, 0); - if( pAccum ){ - if( pAccum->accError==SQLITE_TOOBIG ){ - sqlite3_result_error_toobig(context); - }else if( pAccum->accError==SQLITE_NOMEM ){ - sqlite3_result_error_nomem(context); - }else{ - sqlite3_result_text(context, sqlite3StrAccumFinish(pAccum), -1, - sqlite3_free); - } + GroupConcatCtx *pGCC + = (GroupConcatCtx*)sqlite3_aggregate_context(context, 0); + if( pGCC ){ + sqlite3ResultStrAccum(context, &pGCC->str); +#ifndef SQLITE_OMIT_WINDOWFUNC + sqlite3_free(pGCC->pnSepLengths); +#endif } } #ifndef SQLITE_OMIT_WINDOWFUNC static void groupConcatValue(sqlite3_context *context){ - sqlite3_str *pAccum; - pAccum = (sqlite3_str*)sqlite3_aggregate_context(context, 0); - if( pAccum ){ + GroupConcatCtx *pGCC + = (GroupConcatCtx*)sqlite3_aggregate_context(context, 0); + if( pGCC ){ + StrAccum *pAccum = &pGCC->str; if( pAccum->accError==SQLITE_TOOBIG ){ sqlite3_result_error_toobig(context); }else if( pAccum->accError==SQLITE_NOMEM ){ sqlite3_result_error_nomem(context); - }else{ + }else{ const char *zText = sqlite3_str_value(pAccum); - sqlite3_result_text(context, zText, -1, SQLITE_TRANSIENT); + sqlite3_result_text(context, zText, pAccum->nChar, SQLITE_TRANSIENT); } } } @@ -1830,8 +2235,10 @@ void sqlite3RegisterPerConnectionBuiltinFunctions(sqlite3 *db){ ** sensitive. */ void sqlite3RegisterLikeFunctions(sqlite3 *db, int caseSensitive){ + FuncDef *pDef; struct compareInfo *pInfo; int flags; + int nArg; if( caseSensitive ){ pInfo = (struct compareInfo*)&likeInfoAlt; flags = SQLITE_FUNC_LIKE | SQLITE_FUNC_CASE; @@ -1839,17 +2246,20 @@ void sqlite3RegisterLikeFunctions(sqlite3 *db, int caseSensitive){ pInfo = (struct compareInfo*)&likeInfoNorm; flags = SQLITE_FUNC_LIKE; } - sqlite3CreateFunc(db, "like", 2, SQLITE_UTF8, pInfo, likeFunc, 0, 0, 0, 0, 0); - sqlite3CreateFunc(db, "like", 3, SQLITE_UTF8, pInfo, likeFunc, 0, 0, 0, 0, 0); - sqlite3FindFunction(db, "like", 2, SQLITE_UTF8, 0)->funcFlags |= flags; - sqlite3FindFunction(db, "like", 3, SQLITE_UTF8, 0)->funcFlags |= flags; + for(nArg=2; nArg<=3; nArg++){ + sqlite3CreateFunc(db, "like", nArg, SQLITE_UTF8, pInfo, likeFunc, + 0, 0, 0, 0, 0); + pDef = sqlite3FindFunction(db, "like", nArg, SQLITE_UTF8, 0); + pDef->funcFlags |= flags; + pDef->funcFlags &= ~SQLITE_FUNC_UNSAFE; + } } /* ** pExpr points to an expression which implements a function. If ** it is appropriate to apply the LIKE optimization to that function ** then set aWc[0] through aWc[2] to the wildcard characters and the -** escape character and then return TRUE. If the function is not a +** escape character and then return TRUE. If the function is not a ** LIKE-style function then return FALSE. ** ** The expression "a LIKE b ESCAPE c" is only considered a valid LIKE @@ -1865,11 +2275,14 @@ void sqlite3RegisterLikeFunctions(sqlite3 *db, int caseSensitive){ int sqlite3IsLikeFunction(sqlite3 *db, Expr *pExpr, int *pIsNocase, char *aWc){ FuncDef *pDef; int nExpr; - if( pExpr->op!=TK_FUNCTION || !pExpr->x.pList ){ + assert( pExpr!=0 ); + assert( pExpr->op==TK_FUNCTION ); + assert( ExprUseXList(pExpr) ); + if( !pExpr->x.pList ){ return 0; } - assert( !ExprHasProperty(pExpr, EP_xIsSelect) ); nExpr = pExpr->x.pList->nExpr; + assert( !ExprHasProperty(pExpr, EP_IntValue) ); pDef = sqlite3FindFunction(db, pExpr->u.zToken, nExpr, SQLITE_UTF8, 0); #ifdef SQLITE_ENABLE_UNKNOWN_SQL_FUNCTION if( pDef==0 ) return 0; @@ -1893,6 +2306,7 @@ int sqlite3IsLikeFunction(sqlite3 *db, Expr *pExpr, int *pIsNocase, char *aWc){ Expr *pEscape = pExpr->x.pList->a[2].pExpr; char *zEscape; if( pEscape->op!=TK_STRING ) return 0; + assert( !ExprHasProperty(pEscape, EP_IntValue) ); zEscape = pEscape->u.zToken; if( zEscape[0]==0 || zEscape[1]!=0 ) return 0; if( zEscape[0]==aWc[0] ) return 0; @@ -1904,6 +2318,243 @@ int sqlite3IsLikeFunction(sqlite3 *db, Expr *pExpr, int *pIsNocase, char *aWc){ return 1; } +/* Mathematical Constants */ +#ifndef M_PI +# define M_PI 3.141592653589793238462643383279502884 +#endif +#ifndef M_LN10 +# define M_LN10 2.302585092994045684017991454684364208 +#endif +#ifndef M_LN2 +# define M_LN2 0.693147180559945309417232121458176568 +#endif + + +/* Extra math functions that require linking with -lm +*/ +#ifdef SQLITE_ENABLE_MATH_FUNCTIONS +/* +** Implementation SQL functions: +** +** ceil(X) +** ceiling(X) +** floor(X) +** +** The sqlite3_user_data() pointer is a pointer to the libm implementation +** of the underlying C function. +*/ +static void ceilingFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + assert( argc==1 ); + switch( sqlite3_value_numeric_type(argv[0]) ){ + case SQLITE_INTEGER: { + sqlite3_result_int64(context, sqlite3_value_int64(argv[0])); + break; + } + case SQLITE_FLOAT: { + double (*x)(double) = (double(*)(double))sqlite3_user_data(context); + sqlite3_result_double(context, x(sqlite3_value_double(argv[0]))); + break; + } + default: { + break; + } + } +} + +/* +** On some systems, ceil() and floor() are intrinsic function. You are +** unable to take a pointer to these functions. Hence, we here wrap them +** in our own actual functions. +*/ +static double xCeil(double x){ return ceil(x); } +static double xFloor(double x){ return floor(x); } + +/* +** Some systems do not have log2() and log10() in their standard math +** libraries. +*/ +#if defined(HAVE_LOG10) && HAVE_LOG10==0 +# define log10(X) (0.4342944819032517867*log(X)) +#endif +#if defined(HAVE_LOG2) && HAVE_LOG2==0 +# define log2(X) (1.442695040888963456*log(X)) +#endif + + +/* +** Implementation of SQL functions: +** +** ln(X) - natural logarithm +** log(X) - log X base 10 +** log10(X) - log X base 10 +** log(B,X) - log X base B +*/ +static void logFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + double x, b, ans; + assert( argc==1 || argc==2 ); + switch( sqlite3_value_numeric_type(argv[0]) ){ + case SQLITE_INTEGER: + case SQLITE_FLOAT: + x = sqlite3_value_double(argv[0]); + if( x<=0.0 ) return; + break; + default: + return; + } + if( argc==2 ){ + switch( sqlite3_value_numeric_type(argv[0]) ){ + case SQLITE_INTEGER: + case SQLITE_FLOAT: + b = log(x); + if( b<=0.0 ) return; + x = sqlite3_value_double(argv[1]); + if( x<=0.0 ) return; + break; + default: + return; + } + ans = log(x)/b; + }else{ + switch( SQLITE_PTR_TO_INT(sqlite3_user_data(context)) ){ + case 1: + ans = log10(x); + break; + case 2: + ans = log2(x); + break; + default: + ans = log(x); + break; + } + } + sqlite3_result_double(context, ans); +} + +/* +** Functions to converts degrees to radians and radians to degrees. +*/ +static double degToRad(double x){ return x*(M_PI/180.0); } +static double radToDeg(double x){ return x*(180.0/M_PI); } + +/* +** Implementation of 1-argument SQL math functions: +** +** exp(X) - Compute e to the X-th power +*/ +static void math1Func( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + int type0; + double v0, ans; + double (*x)(double); + assert( argc==1 ); + type0 = sqlite3_value_numeric_type(argv[0]); + if( type0!=SQLITE_INTEGER && type0!=SQLITE_FLOAT ) return; + v0 = sqlite3_value_double(argv[0]); + x = (double(*)(double))sqlite3_user_data(context); + ans = x(v0); + sqlite3_result_double(context, ans); +} + +/* +** Implementation of 2-argument SQL math functions: +** +** power(X,Y) - Compute X to the Y-th power +*/ +static void math2Func( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + int type0, type1; + double v0, v1, ans; + double (*x)(double,double); + assert( argc==2 ); + type0 = sqlite3_value_numeric_type(argv[0]); + if( type0!=SQLITE_INTEGER && type0!=SQLITE_FLOAT ) return; + type1 = sqlite3_value_numeric_type(argv[1]); + if( type1!=SQLITE_INTEGER && type1!=SQLITE_FLOAT ) return; + v0 = sqlite3_value_double(argv[0]); + v1 = sqlite3_value_double(argv[1]); + x = (double(*)(double,double))sqlite3_user_data(context); + ans = x(v0, v1); + sqlite3_result_double(context, ans); +} + +/* +** Implementation of 0-argument pi() function. +*/ +static void piFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + assert( argc==0 ); + (void)argv; + sqlite3_result_double(context, M_PI); +} + +#endif /* SQLITE_ENABLE_MATH_FUNCTIONS */ + +/* +** Implementation of sign(X) function. +*/ +static void signFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + int type0; + double x; + UNUSED_PARAMETER(argc); + assert( argc==1 ); + type0 = sqlite3_value_numeric_type(argv[0]); + if( type0!=SQLITE_INTEGER && type0!=SQLITE_FLOAT ) return; + x = sqlite3_value_double(argv[0]); + sqlite3_result_int(context, x<0.0 ? -1 : x>0.0 ? +1 : 0); +} + +#ifdef SQLITE_DEBUG +/* +** Implementation of fpdecode(x,y,z) function. +** +** x is a real number that is to be decoded. y is the precision. +** z is the maximum real precision. +*/ +static void fpdecodeFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + FpDecode s; + double x; + int y, z; + char zBuf[100]; + UNUSED_PARAMETER(argc); + assert( argc==3 ); + x = sqlite3_value_double(argv[0]); + y = sqlite3_value_int(argv[1]); + z = sqlite3_value_int(argv[2]); + sqlite3FpDecode(&s, x, y, z); + if( s.isSpecial==2 ){ + sqlite3_snprintf(sizeof(zBuf), zBuf, "NaN"); + }else{ + sqlite3_snprintf(sizeof(zBuf), zBuf, "%c%.*s/%d", s.sign, s.n, s.z, s.iDP); + } + sqlite3_result_text(context, zBuf, -1, SQLITE_TRANSIENT); +} +#endif /* SQLITE_DEBUG */ + /* ** All of the FuncDef structures in the aBuiltinFunc[] array above ** to the global function hash table. This occurs at start-time (as @@ -1924,12 +2575,12 @@ void sqlite3RegisterBuiltinFunctions(void){ */ static FuncDef aBuiltinFunc[] = { /***** Functions only available with SQLITE_TESTCTRL_INTERNAL_FUNCTIONS *****/ +#if !defined(SQLITE_UNTESTABLE) TEST_FUNC(implies_nonnull_row, 2, INLINEFUNC_implies_nonnull_row, 0), TEST_FUNC(expr_compare, 2, INLINEFUNC_expr_compare, 0), TEST_FUNC(expr_implies_expr, 2, INLINEFUNC_expr_implies_expr, 0), -#ifdef SQLITE_DEBUG - TEST_FUNC(affinity, 1, INLINEFUNC_affinity, 0), -#endif + TEST_FUNC(affinity, 1, INLINEFUNC_affinity, 0), +#endif /* !defined(SQLITE_UNTESTABLE) */ /***** Regular functions *****/ #ifdef SQLITE_SOUNDEX FUNCTION(soundex, 1, 0, 0, soundexFunc ), @@ -1949,8 +2600,7 @@ void sqlite3RegisterBuiltinFunctions(void){ INLINE_FUNC(likelihood, 2, INLINEFUNC_unlikely, SQLITE_FUNC_UNLIKELY), INLINE_FUNC(likely, 1, INLINEFUNC_unlikely, SQLITE_FUNC_UNLIKELY), #ifdef SQLITE_ENABLE_OFFSET_SQL_FUNC - FUNCTION2(sqlite_offset, 1, 0, 0, noopFunc, SQLITE_FUNC_OFFSET| - SQLITE_FUNC_TYPEOF), + INLINE_FUNC(sqlite_offset, 1, INLINEFUNC_sqlite_offset, 0 ), #endif FUNCTION(ltrim, 1, 1, 0, trimFunc ), FUNCTION(ltrim, 2, 1, 0, trimFunc ), @@ -1961,18 +2611,24 @@ void sqlite3RegisterBuiltinFunctions(void){ FUNCTION(min, -1, 0, 1, minmaxFunc ), FUNCTION(min, 0, 0, 1, 0 ), WAGGREGATE(min, 1, 0, 1, minmaxStep, minMaxFinalize, minMaxValue, 0, - SQLITE_FUNC_MINMAX ), + SQLITE_FUNC_MINMAX|SQLITE_FUNC_ANYORDER ), FUNCTION(max, -1, 1, 1, minmaxFunc ), FUNCTION(max, 0, 1, 1, 0 ), WAGGREGATE(max, 1, 1, 1, minmaxStep, minMaxFinalize, minMaxValue, 0, - SQLITE_FUNC_MINMAX ), + SQLITE_FUNC_MINMAX|SQLITE_FUNC_ANYORDER ), FUNCTION2(typeof, 1, 0, 0, typeofFunc, SQLITE_FUNC_TYPEOF), + FUNCTION2(subtype, 1, 0, 0, subtypeFunc, SQLITE_FUNC_TYPEOF), FUNCTION2(length, 1, 0, 0, lengthFunc, SQLITE_FUNC_LENGTH), + FUNCTION2(octet_length, 1, 0, 0, bytelengthFunc,SQLITE_FUNC_BYTELEN), FUNCTION(instr, 2, 0, 0, instrFunc ), FUNCTION(printf, -1, 0, 0, printfFunc ), + FUNCTION(format, -1, 0, 0, printfFunc ), FUNCTION(unicode, 1, 0, 0, unicodeFunc ), FUNCTION(char, -1, 0, 0, charFunc ), FUNCTION(abs, 1, 0, 0, absFunc ), +#ifdef SQLITE_DEBUG + FUNCTION(fpdecode, 3, 0, 0, fpdecodeFunc ), +#endif #ifndef SQLITE_OMIT_FLOATING_POINT FUNCTION(round, 1, 0, 0, roundFunc ), FUNCTION(round, 2, 0, 0, roundFunc ), @@ -1980,6 +2636,13 @@ void sqlite3RegisterBuiltinFunctions(void){ FUNCTION(upper, 1, 0, 0, upperFunc ), FUNCTION(lower, 1, 0, 0, lowerFunc ), FUNCTION(hex, 1, 0, 0, hexFunc ), + FUNCTION(unhex, 1, 0, 0, unhexFunc ), + FUNCTION(unhex, 2, 0, 0, unhexFunc ), + FUNCTION(concat, -1, 0, 0, concatFunc ), + FUNCTION(concat, 0, 0, 0, 0 ), + FUNCTION(concat_ws, -1, 0, 0, concatwsFunc ), + FUNCTION(concat_ws, 0, 0, 0, 0 ), + FUNCTION(concat_ws, 1, 0, 0, 0 ), INLINE_FUNC(ifnull, 2, INLINEFUNC_coalesce, 0 ), VFUNCTION(random, 0, 0, 0, randomFunc ), VFUNCTION(randomblob, 1, 0, 0, randomBlob ), @@ -1995,18 +2658,23 @@ void sqlite3RegisterBuiltinFunctions(void){ FUNCTION(zeroblob, 1, 0, 0, zeroblobFunc ), FUNCTION(substr, 2, 0, 0, substrFunc ), FUNCTION(substr, 3, 0, 0, substrFunc ), + FUNCTION(substring, 2, 0, 0, substrFunc ), + FUNCTION(substring, 3, 0, 0, substrFunc ), WAGGREGATE(sum, 1,0,0, sumStep, sumFinalize, sumFinalize, sumInverse, 0), WAGGREGATE(total, 1,0,0, sumStep,totalFinalize,totalFinalize,sumInverse, 0), WAGGREGATE(avg, 1,0,0, sumStep, avgFinalize, avgFinalize, sumInverse, 0), - WAGGREGATE(count, 0,0,0, countStep, - countFinalize, countFinalize, countInverse, SQLITE_FUNC_COUNT ), - WAGGREGATE(count, 1,0,0, countStep, - countFinalize, countFinalize, countInverse, 0 ), - WAGGREGATE(group_concat, 1, 0, 0, groupConcatStep, + WAGGREGATE(count, 0,0,0, countStep, + countFinalize, countFinalize, countInverse, + SQLITE_FUNC_COUNT|SQLITE_FUNC_ANYORDER ), + WAGGREGATE(count, 1,0,0, countStep, + countFinalize, countFinalize, countInverse, SQLITE_FUNC_ANYORDER ), + WAGGREGATE(group_concat, 1, 0, 0, groupConcatStep, + groupConcatFinalize, groupConcatValue, groupConcatInverse, 0), + WAGGREGATE(group_concat, 2, 0, 0, groupConcatStep, groupConcatFinalize, groupConcatValue, groupConcatInverse, 0), - WAGGREGATE(group_concat, 2, 0, 0, groupConcatStep, + WAGGREGATE(string_agg, 2, 0, 0, groupConcatStep, groupConcatFinalize, groupConcatValue, groupConcatInverse, 0), - + LIKEFUNC(glob, 2, &globInfo, SQLITE_FUNC_LIKE|SQLITE_FUNC_CASE), #ifdef SQLITE_CASE_SENSITIVE_LIKE LIKEFUNC(like, 2, &likeInfoAlt, SQLITE_FUNC_LIKE|SQLITE_FUNC_CASE), @@ -2020,6 +2688,43 @@ void sqlite3RegisterBuiltinFunctions(void){ #endif FUNCTION(coalesce, 1, 0, 0, 0 ), FUNCTION(coalesce, 0, 0, 0, 0 ), +#ifdef SQLITE_ENABLE_MATH_FUNCTIONS + MFUNCTION(ceil, 1, xCeil, ceilingFunc ), + MFUNCTION(ceiling, 1, xCeil, ceilingFunc ), + MFUNCTION(floor, 1, xFloor, ceilingFunc ), +#if SQLITE_HAVE_C99_MATH_FUNCS + MFUNCTION(trunc, 1, trunc, ceilingFunc ), +#endif + FUNCTION(ln, 1, 0, 0, logFunc ), + FUNCTION(log, 1, 1, 0, logFunc ), + FUNCTION(log10, 1, 1, 0, logFunc ), + FUNCTION(log2, 1, 2, 0, logFunc ), + FUNCTION(log, 2, 0, 0, logFunc ), + MFUNCTION(exp, 1, exp, math1Func ), + MFUNCTION(pow, 2, pow, math2Func ), + MFUNCTION(power, 2, pow, math2Func ), + MFUNCTION(mod, 2, fmod, math2Func ), + MFUNCTION(acos, 1, acos, math1Func ), + MFUNCTION(asin, 1, asin, math1Func ), + MFUNCTION(atan, 1, atan, math1Func ), + MFUNCTION(atan2, 2, atan2, math2Func ), + MFUNCTION(cos, 1, cos, math1Func ), + MFUNCTION(sin, 1, sin, math1Func ), + MFUNCTION(tan, 1, tan, math1Func ), + MFUNCTION(cosh, 1, cosh, math1Func ), + MFUNCTION(sinh, 1, sinh, math1Func ), + MFUNCTION(tanh, 1, tanh, math1Func ), +#if SQLITE_HAVE_C99_MATH_FUNCS + MFUNCTION(acosh, 1, acosh, math1Func ), + MFUNCTION(asinh, 1, asinh, math1Func ), + MFUNCTION(atanh, 1, atanh, math1Func ), +#endif + MFUNCTION(sqrt, 1, sqrt, math1Func ), + MFUNCTION(radians, 1, degToRad, math1Func ), + MFUNCTION(degrees, 1, radToDeg, math1Func ), + FUNCTION(pi, 0, 0, 0, piFunc ), +#endif /* SQLITE_ENABLE_MATH_FUNCTIONS */ + FUNCTION(sign, 1, 0, 0, signFunc ), INLINE_FUNC(coalesce, -1, INLINEFUNC_coalesce, 0 ), INLINE_FUNC(iif, 3, INLINEFUNC_iif, 0 ), }; @@ -2028,6 +2733,7 @@ void sqlite3RegisterBuiltinFunctions(void){ #endif sqlite3WindowFunctions(); sqlite3RegisterDateTimeFunctions(); + sqlite3RegisterJsonFunctions(); sqlite3InsertBuiltinFuncs(aBuiltinFunc, ArraySize(aBuiltinFunc)); #if 0 /* Enable to print out how the built-in functions are hashed */ @@ -2039,6 +2745,7 @@ void sqlite3RegisterBuiltinFunctions(void){ for(p=sqlite3BuiltinFunctions.a[i]; p; p=p->u.pHash){ int n = sqlite3Strlen30(p->zName); int h = p->zName[0] + n; + assert( p->funcFlags & SQLITE_FUNC_BUILTIN ); printf(" %s(%d)", p->zName, h); } printf("\n"); |