1 /* 2 ** The "printf" code that follows dates from the 1980's. It is in 3 ** the public domain. 4 ** 5 ************************************************************************** 6 ** 7 ** This file contains code for a set of "printf"-like routines. These 8 ** routines format strings much like the printf() from the standard C 9 ** library, though the implementation here has enhancements to support 10 ** SQLite. 11 */ 12 #include "sqliteInt.h" 13 14 /* 15 ** Conversion types fall into various categories as defined by the 16 ** following enumeration. 17 */ 18 #define etRADIX 0 /* non-decimal integer types. %x %o */ 19 #define etFLOAT 1 /* Floating point. %f */ 20 #define etEXP 2 /* Exponentional notation. %e and %E */ 21 #define etGENERIC 3 /* Floating or exponential, depending on exponent. %g */ 22 #define etSIZE 4 /* Return number of characters processed so far. %n */ 23 #define etSTRING 5 /* Strings. %s */ 24 #define etDYNSTRING 6 /* Dynamically allocated strings. %z */ 25 #define etPERCENT 7 /* Percent symbol. %% */ 26 #define etCHARX 8 /* Characters. %c */ 27 /* The rest are extensions, not normally found in printf() */ 28 #define etSQLESCAPE 9 /* Strings with '\'' doubled. %q */ 29 #define etSQLESCAPE2 10 /* Strings with '\'' doubled and enclosed in '', 30 NULL pointers replaced by SQL NULL. %Q */ 31 #define etTOKEN 11 /* a pointer to a Token structure */ 32 #define etSRCLIST 12 /* a pointer to a SrcList */ 33 #define etPOINTER 13 /* The %p conversion */ 34 #define etSQLESCAPE3 14 /* %w -> Strings with '\"' doubled */ 35 #define etORDINAL 15 /* %r -> 1st, 2nd, 3rd, 4th, etc. English only */ 36 #define etDECIMAL 16 /* %d or %u, but not %x, %o */ 37 38 #define etINVALID 17 /* Any unrecognized conversion type */ 39 40 41 /* 42 ** An "etByte" is an 8-bit unsigned value. 43 */ 44 typedef unsigned char etByte; 45 46 /* 47 ** Each builtin conversion character (ex: the 'd' in "%d") is described 48 ** by an instance of the following structure 49 */ 50 typedef struct et_info { /* Information about each format field */ 51 char fmttype; /* The format field code letter */ 52 etByte base; /* The base for radix conversion */ 53 etByte flags; /* One or more of FLAG_ constants below */ 54 etByte type; /* Conversion paradigm */ 55 etByte charset; /* Offset into aDigits[] of the digits string */ 56 etByte prefix; /* Offset into aPrefix[] of the prefix string */ 57 } et_info; 58 59 /* 60 ** Allowed values for et_info.flags 61 */ 62 #define FLAG_SIGNED 1 /* True if the value to convert is signed */ 63 #define FLAG_STRING 4 /* Allow infinite precision */ 64 65 66 /* 67 ** The following table is searched linearly, so it is good to put the 68 ** most frequently used conversion types first. 69 */ 70 static const char aDigits[] = "0123456789ABCDEF0123456789abcdef"; 71 static const char aPrefix[] = "-x0\000X0"; 72 static const et_info fmtinfo[] = { 73 { 'd', 10, 1, etDECIMAL, 0, 0 }, 74 { 's', 0, 4, etSTRING, 0, 0 }, 75 { 'g', 0, 1, etGENERIC, 30, 0 }, 76 { 'z', 0, 4, etDYNSTRING, 0, 0 }, 77 { 'q', 0, 4, etSQLESCAPE, 0, 0 }, 78 { 'Q', 0, 4, etSQLESCAPE2, 0, 0 }, 79 { 'w', 0, 4, etSQLESCAPE3, 0, 0 }, 80 { 'c', 0, 0, etCHARX, 0, 0 }, 81 { 'o', 8, 0, etRADIX, 0, 2 }, 82 { 'u', 10, 0, etDECIMAL, 0, 0 }, 83 { 'x', 16, 0, etRADIX, 16, 1 }, 84 { 'X', 16, 0, etRADIX, 0, 4 }, 85 #ifndef SQLITE_OMIT_FLOATING_POINT 86 { 'f', 0, 1, etFLOAT, 0, 0 }, 87 { 'e', 0, 1, etEXP, 30, 0 }, 88 { 'E', 0, 1, etEXP, 14, 0 }, 89 { 'G', 0, 1, etGENERIC, 14, 0 }, 90 #endif 91 { 'i', 10, 1, etDECIMAL, 0, 0 }, 92 { 'n', 0, 0, etSIZE, 0, 0 }, 93 { '%', 0, 0, etPERCENT, 0, 0 }, 94 { 'p', 16, 0, etPOINTER, 0, 1 }, 95 96 /* All the rest are undocumented and are for internal use only */ 97 { 'T', 0, 0, etTOKEN, 0, 0 }, 98 { 'S', 0, 0, etSRCLIST, 0, 0 }, 99 { 'r', 10, 1, etORDINAL, 0, 0 }, 100 }; 101 102 /* Floating point constants used for rounding */ 103 static const double arRound[] = { 104 5.0e-01, 5.0e-02, 5.0e-03, 5.0e-04, 5.0e-05, 105 5.0e-06, 5.0e-07, 5.0e-08, 5.0e-09, 5.0e-10, 106 }; 107 108 /* 109 ** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point 110 ** conversions will work. 111 */ 112 #ifndef SQLITE_OMIT_FLOATING_POINT 113 /* 114 ** "*val" is a double such that 0.1 <= *val < 10.0 115 ** Return the ascii code for the leading digit of *val, then 116 ** multiply "*val" by 10.0 to renormalize. 117 ** 118 ** Example: 119 ** input: *val = 3.14159 120 ** output: *val = 1.4159 function return = '3' 121 ** 122 ** The counter *cnt is incremented each time. After counter exceeds 123 ** 16 (the number of significant digits in a 64-bit float) '0' is 124 ** always returned. 125 */ 126 static char et_getdigit(LONGDOUBLE_TYPE *val, int *cnt){ 127 int digit; 128 LONGDOUBLE_TYPE d; 129 if( (*cnt)<=0 ) return '0'; 130 (*cnt)--; 131 digit = (int)*val; 132 d = digit; 133 digit += '0'; 134 *val = (*val - d)*10.0; 135 return (char)digit; 136 } 137 #endif /* SQLITE_OMIT_FLOATING_POINT */ 138 139 /* 140 ** Set the StrAccum object to an error mode. 141 */ 142 static void setStrAccumError(StrAccum *p, u8 eError){ 143 assert( eError==SQLITE_NOMEM || eError==SQLITE_TOOBIG ); 144 p->accError = eError; 145 if( p->mxAlloc ) sqlite3_str_reset(p); 146 if( eError==SQLITE_TOOBIG ) sqlite3ErrorToParser(p->db, eError); 147 } 148 149 /* 150 ** Extra argument values from a PrintfArguments object 151 */ 152 static sqlite3_int64 getIntArg(PrintfArguments *p){ 153 if( p->nArg<=p->nUsed ) return 0; 154 return sqlite3_value_int64(p->apArg[p->nUsed++]); 155 } 156 static double getDoubleArg(PrintfArguments *p){ 157 if( p->nArg<=p->nUsed ) return 0.0; 158 return sqlite3_value_double(p->apArg[p->nUsed++]); 159 } 160 static char *getTextArg(PrintfArguments *p){ 161 if( p->nArg<=p->nUsed ) return 0; 162 return (char*)sqlite3_value_text(p->apArg[p->nUsed++]); 163 } 164 165 /* 166 ** Allocate memory for a temporary buffer needed for printf rendering. 167 ** 168 ** If the requested size of the temp buffer is larger than the size 169 ** of the output buffer in pAccum, then cause an SQLITE_TOOBIG error. 170 ** Do the size check before the memory allocation to prevent rogue 171 ** SQL from requesting large allocations using the precision or width 172 ** field of the printf() function. 173 */ 174 static char *printfTempBuf(sqlite3_str *pAccum, sqlite3_int64 n){ 175 char *z; 176 if( pAccum->accError ) return 0; 177 if( n>pAccum->nAlloc && n>pAccum->mxAlloc ){ 178 setStrAccumError(pAccum, SQLITE_TOOBIG); 179 return 0; 180 } 181 z = sqlite3DbMallocRaw(pAccum->db, n); 182 if( z==0 ){ 183 setStrAccumError(pAccum, SQLITE_NOMEM); 184 } 185 return z; 186 } 187 188 /* 189 ** On machines with a small stack size, you can redefine the 190 ** SQLITE_PRINT_BUF_SIZE to be something smaller, if desired. 191 */ 192 #ifndef SQLITE_PRINT_BUF_SIZE 193 # define SQLITE_PRINT_BUF_SIZE 70 194 #endif 195 #define etBUFSIZE SQLITE_PRINT_BUF_SIZE /* Size of the output buffer */ 196 197 /* 198 ** Hard limit on the precision of floating-point conversions. 199 */ 200 #ifndef SQLITE_PRINTF_PRECISION_LIMIT 201 # define SQLITE_FP_PRECISION_LIMIT 100000000 202 #endif 203 204 /* 205 ** Render a string given by "fmt" into the StrAccum object. 206 */ 207 void sqlite3_str_vappendf( 208 sqlite3_str *pAccum, /* Accumulate results here */ 209 const char *fmt, /* Format string */ 210 va_list ap /* arguments */ 211 ){ 212 int c; /* Next character in the format string */ 213 char *bufpt; /* Pointer to the conversion buffer */ 214 int precision; /* Precision of the current field */ 215 int length; /* Length of the field */ 216 int idx; /* A general purpose loop counter */ 217 int width; /* Width of the current field */ 218 etByte flag_leftjustify; /* True if "-" flag is present */ 219 etByte flag_prefix; /* '+' or ' ' or 0 for prefix */ 220 etByte flag_alternateform; /* True if "#" flag is present */ 221 etByte flag_altform2; /* True if "!" flag is present */ 222 etByte flag_zeropad; /* True if field width constant starts with zero */ 223 etByte flag_long; /* 1 for the "l" flag, 2 for "ll", 0 by default */ 224 etByte done; /* Loop termination flag */ 225 etByte cThousand; /* Thousands separator for %d and %u */ 226 etByte xtype = etINVALID; /* Conversion paradigm */ 227 u8 bArgList; /* True for SQLITE_PRINTF_SQLFUNC */ 228 char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */ 229 sqlite_uint64 longvalue; /* Value for integer types */ 230 LONGDOUBLE_TYPE realvalue; /* Value for real types */ 231 const et_info *infop; /* Pointer to the appropriate info structure */ 232 char *zOut; /* Rendering buffer */ 233 int nOut; /* Size of the rendering buffer */ 234 char *zExtra = 0; /* Malloced memory used by some conversion */ 235 #ifndef SQLITE_OMIT_FLOATING_POINT 236 int exp, e2; /* exponent of real numbers */ 237 int nsd; /* Number of significant digits returned */ 238 double rounder; /* Used for rounding floating point values */ 239 etByte flag_dp; /* True if decimal point should be shown */ 240 etByte flag_rtz; /* True if trailing zeros should be removed */ 241 #endif 242 PrintfArguments *pArgList = 0; /* Arguments for SQLITE_PRINTF_SQLFUNC */ 243 char buf[etBUFSIZE]; /* Conversion buffer */ 244 245 /* pAccum never starts out with an empty buffer that was obtained from 246 ** malloc(). This precondition is required by the mprintf("%z...") 247 ** optimization. */ 248 assert( pAccum->nChar>0 || (pAccum->printfFlags&SQLITE_PRINTF_MALLOCED)==0 ); 249 250 bufpt = 0; 251 if( (pAccum->printfFlags & SQLITE_PRINTF_SQLFUNC)!=0 ){ 252 pArgList = va_arg(ap, PrintfArguments*); 253 bArgList = 1; 254 }else{ 255 bArgList = 0; 256 } 257 for(; (c=(*fmt))!=0; ++fmt){ 258 if( c!='%' ){ 259 bufpt = (char *)fmt; 260 #if HAVE_STRCHRNUL 261 fmt = strchrnul(fmt, '%'); 262 #else 263 do{ fmt++; }while( *fmt && *fmt != '%' ); 264 #endif 265 sqlite3_str_append(pAccum, bufpt, (int)(fmt - bufpt)); 266 if( *fmt==0 ) break; 267 } 268 if( (c=(*++fmt))==0 ){ 269 sqlite3_str_append(pAccum, "%", 1); 270 break; 271 } 272 /* Find out what flags are present */ 273 flag_leftjustify = flag_prefix = cThousand = 274 flag_alternateform = flag_altform2 = flag_zeropad = 0; 275 done = 0; 276 width = 0; 277 flag_long = 0; 278 precision = -1; 279 do{ 280 switch( c ){ 281 case '-': flag_leftjustify = 1; break; 282 case '+': flag_prefix = '+'; break; 283 case ' ': flag_prefix = ' '; break; 284 case '#': flag_alternateform = 1; break; 285 case '!': flag_altform2 = 1; break; 286 case '0': flag_zeropad = 1; break; 287 case ',': cThousand = ','; break; 288 default: done = 1; break; 289 case 'l': { 290 flag_long = 1; 291 c = *++fmt; 292 if( c=='l' ){ 293 c = *++fmt; 294 flag_long = 2; 295 } 296 done = 1; 297 break; 298 } 299 case '1': case '2': case '3': case '4': case '5': 300 case '6': case '7': case '8': case '9': { 301 unsigned wx = c - '0'; 302 while( (c = *++fmt)>='0' && c<='9' ){ 303 wx = wx*10 + c - '0'; 304 } 305 testcase( wx>0x7fffffff ); 306 width = wx & 0x7fffffff; 307 #ifdef SQLITE_PRINTF_PRECISION_LIMIT 308 if( width>SQLITE_PRINTF_PRECISION_LIMIT ){ 309 width = SQLITE_PRINTF_PRECISION_LIMIT; 310 } 311 #endif 312 if( c!='.' && c!='l' ){ 313 done = 1; 314 }else{ 315 fmt--; 316 } 317 break; 318 } 319 case '*': { 320 if( bArgList ){ 321 width = (int)getIntArg(pArgList); 322 }else{ 323 width = va_arg(ap,int); 324 } 325 if( width<0 ){ 326 flag_leftjustify = 1; 327 width = width >= -2147483647 ? -width : 0; 328 } 329 #ifdef SQLITE_PRINTF_PRECISION_LIMIT 330 if( width>SQLITE_PRINTF_PRECISION_LIMIT ){ 331 width = SQLITE_PRINTF_PRECISION_LIMIT; 332 } 333 #endif 334 if( (c = fmt[1])!='.' && c!='l' ){ 335 c = *++fmt; 336 done = 1; 337 } 338 break; 339 } 340 case '.': { 341 c = *++fmt; 342 if( c=='*' ){ 343 if( bArgList ){ 344 precision = (int)getIntArg(pArgList); 345 }else{ 346 precision = va_arg(ap,int); 347 } 348 if( precision<0 ){ 349 precision = precision >= -2147483647 ? -precision : -1; 350 } 351 c = *++fmt; 352 }else{ 353 unsigned px = 0; 354 while( c>='0' && c<='9' ){ 355 px = px*10 + c - '0'; 356 c = *++fmt; 357 } 358 testcase( px>0x7fffffff ); 359 precision = px & 0x7fffffff; 360 } 361 #ifdef SQLITE_PRINTF_PRECISION_LIMIT 362 if( precision>SQLITE_PRINTF_PRECISION_LIMIT ){ 363 precision = SQLITE_PRINTF_PRECISION_LIMIT; 364 } 365 #endif 366 if( c=='l' ){ 367 --fmt; 368 }else{ 369 done = 1; 370 } 371 break; 372 } 373 } 374 }while( !done && (c=(*++fmt))!=0 ); 375 376 /* Fetch the info entry for the field */ 377 infop = &fmtinfo[0]; 378 xtype = etINVALID; 379 for(idx=0; idx<ArraySize(fmtinfo); idx++){ 380 if( c==fmtinfo[idx].fmttype ){ 381 infop = &fmtinfo[idx]; 382 xtype = infop->type; 383 break; 384 } 385 } 386 387 /* 388 ** At this point, variables are initialized as follows: 389 ** 390 ** flag_alternateform TRUE if a '#' is present. 391 ** flag_altform2 TRUE if a '!' is present. 392 ** flag_prefix '+' or ' ' or zero 393 ** flag_leftjustify TRUE if a '-' is present or if the 394 ** field width was negative. 395 ** flag_zeropad TRUE if the width began with 0. 396 ** flag_long 1 for "l", 2 for "ll" 397 ** width The specified field width. This is 398 ** always non-negative. Zero is the default. 399 ** precision The specified precision. The default 400 ** is -1. 401 ** xtype The class of the conversion. 402 ** infop Pointer to the appropriate info struct. 403 */ 404 switch( xtype ){ 405 case etPOINTER: 406 flag_long = sizeof(char*)==sizeof(i64) ? 2 : 407 sizeof(char*)==sizeof(long int) ? 1 : 0; 408 /* Fall through into the next case */ 409 case etORDINAL: 410 case etRADIX: 411 cThousand = 0; 412 /* Fall through into the next case */ 413 case etDECIMAL: 414 if( infop->flags & FLAG_SIGNED ){ 415 i64 v; 416 if( bArgList ){ 417 v = getIntArg(pArgList); 418 }else if( flag_long ){ 419 if( flag_long==2 ){ 420 v = va_arg(ap,i64) ; 421 }else{ 422 v = va_arg(ap,long int); 423 } 424 }else{ 425 v = va_arg(ap,int); 426 } 427 if( v<0 ){ 428 if( v==SMALLEST_INT64 ){ 429 longvalue = ((u64)1)<<63; 430 }else{ 431 longvalue = -v; 432 } 433 prefix = '-'; 434 }else{ 435 longvalue = v; 436 prefix = flag_prefix; 437 } 438 }else{ 439 if( bArgList ){ 440 longvalue = (u64)getIntArg(pArgList); 441 }else if( flag_long ){ 442 if( flag_long==2 ){ 443 longvalue = va_arg(ap,u64); 444 }else{ 445 longvalue = va_arg(ap,unsigned long int); 446 } 447 }else{ 448 longvalue = va_arg(ap,unsigned int); 449 } 450 prefix = 0; 451 } 452 if( longvalue==0 ) flag_alternateform = 0; 453 if( flag_zeropad && precision<width-(prefix!=0) ){ 454 precision = width-(prefix!=0); 455 } 456 if( precision<etBUFSIZE-10-etBUFSIZE/3 ){ 457 nOut = etBUFSIZE; 458 zOut = buf; 459 }else{ 460 u64 n; 461 n = (u64)precision + 10; 462 if( cThousand ) n += precision/3; 463 zOut = zExtra = printfTempBuf(pAccum, n); 464 if( zOut==0 ) return; 465 nOut = (int)n; 466 } 467 bufpt = &zOut[nOut-1]; 468 if( xtype==etORDINAL ){ 469 static const char zOrd[] = "thstndrd"; 470 int x = (int)(longvalue % 10); 471 if( x>=4 || (longvalue/10)%10==1 ){ 472 x = 0; 473 } 474 *(--bufpt) = zOrd[x*2+1]; 475 *(--bufpt) = zOrd[x*2]; 476 } 477 { 478 const char *cset = &aDigits[infop->charset]; 479 u8 base = infop->base; 480 do{ /* Convert to ascii */ 481 *(--bufpt) = cset[longvalue%base]; 482 longvalue = longvalue/base; 483 }while( longvalue>0 ); 484 } 485 length = (int)(&zOut[nOut-1]-bufpt); 486 while( precision>length ){ 487 *(--bufpt) = '0'; /* Zero pad */ 488 length++; 489 } 490 if( cThousand ){ 491 int nn = (length - 1)/3; /* Number of "," to insert */ 492 int ix = (length - 1)%3 + 1; 493 bufpt -= nn; 494 for(idx=0; nn>0; idx++){ 495 bufpt[idx] = bufpt[idx+nn]; 496 ix--; 497 if( ix==0 ){ 498 bufpt[++idx] = cThousand; 499 nn--; 500 ix = 3; 501 } 502 } 503 } 504 if( prefix ) *(--bufpt) = prefix; /* Add sign */ 505 if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */ 506 const char *pre; 507 char x; 508 pre = &aPrefix[infop->prefix]; 509 for(; (x=(*pre))!=0; pre++) *(--bufpt) = x; 510 } 511 length = (int)(&zOut[nOut-1]-bufpt); 512 break; 513 case etFLOAT: 514 case etEXP: 515 case etGENERIC: 516 if( bArgList ){ 517 realvalue = getDoubleArg(pArgList); 518 }else{ 519 realvalue = va_arg(ap,double); 520 } 521 #ifdef SQLITE_OMIT_FLOATING_POINT 522 length = 0; 523 #else 524 if( precision<0 ) precision = 6; /* Set default precision */ 525 #ifdef SQLITE_FP_PRECISION_LIMIT 526 if( precision>SQLITE_FP_PRECISION_LIMIT ){ 527 precision = SQLITE_FP_PRECISION_LIMIT; 528 } 529 #endif 530 if( realvalue<0.0 ){ 531 realvalue = -realvalue; 532 prefix = '-'; 533 }else{ 534 prefix = flag_prefix; 535 } 536 if( xtype==etGENERIC && precision>0 ) precision--; 537 testcase( precision>0xfff ); 538 idx = precision & 0xfff; 539 rounder = arRound[idx%10]; 540 while( idx>=10 ){ rounder *= 1.0e-10; idx -= 10; } 541 if( xtype==etFLOAT ){ 542 double rx = (double)realvalue; 543 sqlite3_uint64 u; 544 int ex; 545 memcpy(&u, &rx, sizeof(u)); 546 ex = -1023 + (int)((u>>52)&0x7ff); 547 if( precision+(ex/3) < 15 ) rounder += realvalue*3e-16; 548 realvalue += rounder; 549 } 550 /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */ 551 exp = 0; 552 if( sqlite3IsNaN((double)realvalue) ){ 553 bufpt = "NaN"; 554 length = 3; 555 break; 556 } 557 if( realvalue>0.0 ){ 558 LONGDOUBLE_TYPE scale = 1.0; 559 while( realvalue>=1e100*scale && exp<=350 ){ scale *= 1e100;exp+=100;} 560 while( realvalue>=1e10*scale && exp<=350 ){ scale *= 1e10; exp+=10; } 561 while( realvalue>=10.0*scale && exp<=350 ){ scale *= 10.0; exp++; } 562 realvalue /= scale; 563 while( realvalue<1e-8 ){ realvalue *= 1e8; exp-=8; } 564 while( realvalue<1.0 ){ realvalue *= 10.0; exp--; } 565 if( exp>350 ){ 566 bufpt = buf; 567 buf[0] = prefix; 568 memcpy(buf+(prefix!=0),"Inf",4); 569 length = 3+(prefix!=0); 570 break; 571 } 572 } 573 bufpt = buf; 574 /* 575 ** If the field type is etGENERIC, then convert to either etEXP 576 ** or etFLOAT, as appropriate. 577 */ 578 if( xtype!=etFLOAT ){ 579 realvalue += rounder; 580 if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; } 581 } 582 if( xtype==etGENERIC ){ 583 flag_rtz = !flag_alternateform; 584 if( exp<-4 || exp>precision ){ 585 xtype = etEXP; 586 }else{ 587 precision = precision - exp; 588 xtype = etFLOAT; 589 } 590 }else{ 591 flag_rtz = flag_altform2; 592 } 593 if( xtype==etEXP ){ 594 e2 = 0; 595 }else{ 596 e2 = exp; 597 } 598 { 599 i64 szBufNeeded; /* Size of a temporary buffer needed */ 600 szBufNeeded = MAX(e2,0)+(i64)precision+(i64)width+15; 601 if( szBufNeeded > etBUFSIZE ){ 602 bufpt = zExtra = printfTempBuf(pAccum, szBufNeeded); 603 if( bufpt==0 ) return; 604 } 605 } 606 zOut = bufpt; 607 nsd = 16 + flag_altform2*10; 608 flag_dp = (precision>0 ?1:0) | flag_alternateform | flag_altform2; 609 /* The sign in front of the number */ 610 if( prefix ){ 611 *(bufpt++) = prefix; 612 } 613 /* Digits prior to the decimal point */ 614 if( e2<0 ){ 615 *(bufpt++) = '0'; 616 }else{ 617 for(; e2>=0; e2--){ 618 *(bufpt++) = et_getdigit(&realvalue,&nsd); 619 } 620 } 621 /* The decimal point */ 622 if( flag_dp ){ 623 *(bufpt++) = '.'; 624 } 625 /* "0" digits after the decimal point but before the first 626 ** significant digit of the number */ 627 for(e2++; e2<0; precision--, e2++){ 628 assert( precision>0 ); 629 *(bufpt++) = '0'; 630 } 631 /* Significant digits after the decimal point */ 632 while( (precision--)>0 ){ 633 *(bufpt++) = et_getdigit(&realvalue,&nsd); 634 } 635 /* Remove trailing zeros and the "." if no digits follow the "." */ 636 if( flag_rtz && flag_dp ){ 637 while( bufpt[-1]=='0' ) *(--bufpt) = 0; 638 assert( bufpt>zOut ); 639 if( bufpt[-1]=='.' ){ 640 if( flag_altform2 ){ 641 *(bufpt++) = '0'; 642 }else{ 643 *(--bufpt) = 0; 644 } 645 } 646 } 647 /* Add the "eNNN" suffix */ 648 if( xtype==etEXP ){ 649 *(bufpt++) = aDigits[infop->charset]; 650 if( exp<0 ){ 651 *(bufpt++) = '-'; exp = -exp; 652 }else{ 653 *(bufpt++) = '+'; 654 } 655 if( exp>=100 ){ 656 *(bufpt++) = (char)((exp/100)+'0'); /* 100's digit */ 657 exp %= 100; 658 } 659 *(bufpt++) = (char)(exp/10+'0'); /* 10's digit */ 660 *(bufpt++) = (char)(exp%10+'0'); /* 1's digit */ 661 } 662 *bufpt = 0; 663 664 /* The converted number is in buf[] and zero terminated. Output it. 665 ** Note that the number is in the usual order, not reversed as with 666 ** integer conversions. */ 667 length = (int)(bufpt-zOut); 668 bufpt = zOut; 669 670 /* Special case: Add leading zeros if the flag_zeropad flag is 671 ** set and we are not left justified */ 672 if( flag_zeropad && !flag_leftjustify && length < width){ 673 int i; 674 int nPad = width - length; 675 for(i=width; i>=nPad; i--){ 676 bufpt[i] = bufpt[i-nPad]; 677 } 678 i = prefix!=0; 679 while( nPad-- ) bufpt[i++] = '0'; 680 length = width; 681 } 682 #endif /* !defined(SQLITE_OMIT_FLOATING_POINT) */ 683 break; 684 case etSIZE: 685 if( !bArgList ){ 686 *(va_arg(ap,int*)) = pAccum->nChar; 687 } 688 length = width = 0; 689 break; 690 case etPERCENT: 691 buf[0] = '%'; 692 bufpt = buf; 693 length = 1; 694 break; 695 case etCHARX: 696 if( bArgList ){ 697 bufpt = getTextArg(pArgList); 698 length = 1; 699 if( bufpt ){ 700 buf[0] = c = *(bufpt++); 701 if( (c&0xc0)==0xc0 ){ 702 while( length<4 && (bufpt[0]&0xc0)==0x80 ){ 703 buf[length++] = *(bufpt++); 704 } 705 } 706 }else{ 707 buf[0] = 0; 708 } 709 }else{ 710 unsigned int ch = va_arg(ap,unsigned int); 711 if( ch<0x00080 ){ 712 buf[0] = ch & 0xff; 713 length = 1; 714 }else if( ch<0x00800 ){ 715 buf[0] = 0xc0 + (u8)((ch>>6)&0x1f); 716 buf[1] = 0x80 + (u8)(ch & 0x3f); 717 length = 2; 718 }else if( ch<0x10000 ){ 719 buf[0] = 0xe0 + (u8)((ch>>12)&0x0f); 720 buf[1] = 0x80 + (u8)((ch>>6) & 0x3f); 721 buf[2] = 0x80 + (u8)(ch & 0x3f); 722 length = 3; 723 }else{ 724 buf[0] = 0xf0 + (u8)((ch>>18) & 0x07); 725 buf[1] = 0x80 + (u8)((ch>>12) & 0x3f); 726 buf[2] = 0x80 + (u8)((ch>>6) & 0x3f); 727 buf[3] = 0x80 + (u8)(ch & 0x3f); 728 length = 4; 729 } 730 } 731 if( precision>1 ){ 732 width -= precision-1; 733 if( width>1 && !flag_leftjustify ){ 734 sqlite3_str_appendchar(pAccum, width-1, ' '); 735 width = 0; 736 } 737 while( precision-- > 1 ){ 738 sqlite3_str_append(pAccum, buf, length); 739 } 740 } 741 bufpt = buf; 742 flag_altform2 = 1; 743 goto adjust_width_for_utf8; 744 case etSTRING: 745 case etDYNSTRING: 746 if( bArgList ){ 747 bufpt = getTextArg(pArgList); 748 xtype = etSTRING; 749 }else{ 750 bufpt = va_arg(ap,char*); 751 } 752 if( bufpt==0 ){ 753 bufpt = ""; 754 }else if( xtype==etDYNSTRING ){ 755 if( pAccum->nChar==0 756 && pAccum->mxAlloc 757 && width==0 758 && precision<0 759 && pAccum->accError==0 760 ){ 761 /* Special optimization for sqlite3_mprintf("%z..."): 762 ** Extend an existing memory allocation rather than creating 763 ** a new one. */ 764 assert( (pAccum->printfFlags&SQLITE_PRINTF_MALLOCED)==0 ); 765 pAccum->zText = bufpt; 766 pAccum->nAlloc = sqlite3DbMallocSize(pAccum->db, bufpt); 767 pAccum->nChar = 0x7fffffff & (int)strlen(bufpt); 768 pAccum->printfFlags |= SQLITE_PRINTF_MALLOCED; 769 length = 0; 770 break; 771 } 772 zExtra = bufpt; 773 } 774 if( precision>=0 ){ 775 if( flag_altform2 ){ 776 /* Set length to the number of bytes needed in order to display 777 ** precision characters */ 778 unsigned char *z = (unsigned char*)bufpt; 779 while( precision-- > 0 && z[0] ){ 780 SQLITE_SKIP_UTF8(z); 781 } 782 length = (int)(z - (unsigned char*)bufpt); 783 }else{ 784 for(length=0; length<precision && bufpt[length]; length++){} 785 } 786 }else{ 787 length = 0x7fffffff & (int)strlen(bufpt); 788 } 789 adjust_width_for_utf8: 790 if( flag_altform2 && width>0 ){ 791 /* Adjust width to account for extra bytes in UTF-8 characters */ 792 int ii = length - 1; 793 while( ii>=0 ) if( (bufpt[ii--] & 0xc0)==0x80 ) width++; 794 } 795 break; 796 case etSQLESCAPE: /* %q: Escape ' characters */ 797 case etSQLESCAPE2: /* %Q: Escape ' and enclose in '...' */ 798 case etSQLESCAPE3: { /* %w: Escape " characters */ 799 int i, j, k, n, isnull; 800 int needQuote; 801 char ch; 802 char q = ((xtype==etSQLESCAPE3)?'"':'\''); /* Quote character */ 803 char *escarg; 804 805 if( bArgList ){ 806 escarg = getTextArg(pArgList); 807 }else{ 808 escarg = va_arg(ap,char*); 809 } 810 isnull = escarg==0; 811 if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)"); 812 /* For %q, %Q, and %w, the precision is the number of byte (or 813 ** characters if the ! flags is present) to use from the input. 814 ** Because of the extra quoting characters inserted, the number 815 ** of output characters may be larger than the precision. 816 */ 817 k = precision; 818 for(i=n=0; k!=0 && (ch=escarg[i])!=0; i++, k--){ 819 if( ch==q ) n++; 820 if( flag_altform2 && (ch&0xc0)==0xc0 ){ 821 while( (escarg[i+1]&0xc0)==0x80 ){ i++; } 822 } 823 } 824 needQuote = !isnull && xtype==etSQLESCAPE2; 825 n += i + 3; 826 if( n>etBUFSIZE ){ 827 bufpt = zExtra = printfTempBuf(pAccum, n); 828 if( bufpt==0 ) return; 829 }else{ 830 bufpt = buf; 831 } 832 j = 0; 833 if( needQuote ) bufpt[j++] = q; 834 k = i; 835 for(i=0; i<k; i++){ 836 bufpt[j++] = ch = escarg[i]; 837 if( ch==q ) bufpt[j++] = ch; 838 } 839 if( needQuote ) bufpt[j++] = q; 840 bufpt[j] = 0; 841 length = j; 842 goto adjust_width_for_utf8; 843 } 844 case etTOKEN: { 845 Token *pToken; 846 if( (pAccum->printfFlags & SQLITE_PRINTF_INTERNAL)==0 ) return; 847 pToken = va_arg(ap, Token*); 848 assert( bArgList==0 ); 849 if( pToken && pToken->n ){ 850 sqlite3_str_append(pAccum, (const char*)pToken->z, pToken->n); 851 } 852 length = width = 0; 853 break; 854 } 855 case etSRCLIST: { 856 SrcList *pSrc; 857 int k; 858 struct SrcList_item *pItem; 859 if( (pAccum->printfFlags & SQLITE_PRINTF_INTERNAL)==0 ) return; 860 pSrc = va_arg(ap, SrcList*); 861 k = va_arg(ap, int); 862 pItem = &pSrc->a[k]; 863 assert( bArgList==0 ); 864 assert( k>=0 && k<pSrc->nSrc ); 865 if( pItem->zDatabase ){ 866 sqlite3_str_appendall(pAccum, pItem->zDatabase); 867 sqlite3_str_append(pAccum, ".", 1); 868 } 869 sqlite3_str_appendall(pAccum, pItem->zName); 870 length = width = 0; 871 break; 872 } 873 default: { 874 assert( xtype==etINVALID ); 875 return; 876 } 877 }/* End switch over the format type */ 878 /* 879 ** The text of the conversion is pointed to by "bufpt" and is 880 ** "length" characters long. The field width is "width". Do 881 ** the output. Both length and width are in bytes, not characters, 882 ** at this point. If the "!" flag was present on string conversions 883 ** indicating that width and precision should be expressed in characters, 884 ** then the values have been translated prior to reaching this point. 885 */ 886 width -= length; 887 if( width>0 ){ 888 if( !flag_leftjustify ) sqlite3_str_appendchar(pAccum, width, ' '); 889 sqlite3_str_append(pAccum, bufpt, length); 890 if( flag_leftjustify ) sqlite3_str_appendchar(pAccum, width, ' '); 891 }else{ 892 sqlite3_str_append(pAccum, bufpt, length); 893 } 894 895 if( zExtra ){ 896 sqlite3DbFree(pAccum->db, zExtra); 897 zExtra = 0; 898 } 899 }/* End for loop over the format string */ 900 } /* End of function */ 901 902 /* 903 ** Enlarge the memory allocation on a StrAccum object so that it is 904 ** able to accept at least N more bytes of text. 905 ** 906 ** Return the number of bytes of text that StrAccum is able to accept 907 ** after the attempted enlargement. The value returned might be zero. 908 */ 909 static int sqlite3StrAccumEnlarge(StrAccum *p, int N){ 910 char *zNew; 911 assert( p->nChar+(i64)N >= p->nAlloc ); /* Only called if really needed */ 912 if( p->accError ){ 913 testcase(p->accError==SQLITE_TOOBIG); 914 testcase(p->accError==SQLITE_NOMEM); 915 return 0; 916 } 917 if( p->mxAlloc==0 ){ 918 setStrAccumError(p, SQLITE_TOOBIG); 919 return p->nAlloc - p->nChar - 1; 920 }else{ 921 char *zOld = isMalloced(p) ? p->zText : 0; 922 i64 szNew = p->nChar; 923 szNew += N + 1; 924 if( szNew+p->nChar<=p->mxAlloc ){ 925 /* Force exponential buffer size growth as long as it does not overflow, 926 ** to avoid having to call this routine too often */ 927 szNew += p->nChar; 928 } 929 if( szNew > p->mxAlloc ){ 930 sqlite3_str_reset(p); 931 setStrAccumError(p, SQLITE_TOOBIG); 932 return 0; 933 }else{ 934 p->nAlloc = (int)szNew; 935 } 936 if( p->db ){ 937 zNew = sqlite3DbRealloc(p->db, zOld, p->nAlloc); 938 }else{ 939 zNew = sqlite3Realloc(zOld, p->nAlloc); 940 } 941 if( zNew ){ 942 assert( p->zText!=0 || p->nChar==0 ); 943 if( !isMalloced(p) && p->nChar>0 ) memcpy(zNew, p->zText, p->nChar); 944 p->zText = zNew; 945 p->nAlloc = sqlite3DbMallocSize(p->db, zNew); 946 p->printfFlags |= SQLITE_PRINTF_MALLOCED; 947 }else{ 948 sqlite3_str_reset(p); 949 setStrAccumError(p, SQLITE_NOMEM); 950 return 0; 951 } 952 } 953 return N; 954 } 955 956 /* 957 ** Append N copies of character c to the given string buffer. 958 */ 959 void sqlite3_str_appendchar(sqlite3_str *p, int N, char c){ 960 testcase( p->nChar + (i64)N > 0x7fffffff ); 961 if( p->nChar+(i64)N >= p->nAlloc && (N = sqlite3StrAccumEnlarge(p, N))<=0 ){ 962 return; 963 } 964 while( (N--)>0 ) p->zText[p->nChar++] = c; 965 } 966 967 /* 968 ** The StrAccum "p" is not large enough to accept N new bytes of z[]. 969 ** So enlarge if first, then do the append. 970 ** 971 ** This is a helper routine to sqlite3_str_append() that does special-case 972 ** work (enlarging the buffer) using tail recursion, so that the 973 ** sqlite3_str_append() routine can use fast calling semantics. 974 */ 975 static void SQLITE_NOINLINE enlargeAndAppend(StrAccum *p, const char *z, int N){ 976 N = sqlite3StrAccumEnlarge(p, N); 977 if( N>0 ){ 978 memcpy(&p->zText[p->nChar], z, N); 979 p->nChar += N; 980 } 981 } 982 983 /* 984 ** Append N bytes of text from z to the StrAccum object. Increase the 985 ** size of the memory allocation for StrAccum if necessary. 986 */ 987 void sqlite3_str_append(sqlite3_str *p, const char *z, int N){ 988 assert( z!=0 || N==0 ); 989 assert( p->zText!=0 || p->nChar==0 || p->accError ); 990 assert( N>=0 ); 991 assert( p->accError==0 || p->nAlloc==0 || p->mxAlloc==0 ); 992 if( p->nChar+N >= p->nAlloc ){ 993 enlargeAndAppend(p,z,N); 994 }else if( N ){ 995 assert( p->zText ); 996 p->nChar += N; 997 memcpy(&p->zText[p->nChar-N], z, N); 998 } 999 } 1000 1001 /* 1002 ** Append the complete text of zero-terminated string z[] to the p string. 1003 */ 1004 void sqlite3_str_appendall(sqlite3_str *p, const char *z){ 1005 sqlite3_str_append(p, z, sqlite3Strlen30(z)); 1006 } 1007 1008 1009 /* 1010 ** Finish off a string by making sure it is zero-terminated. 1011 ** Return a pointer to the resulting string. Return a NULL 1012 ** pointer if any kind of error was encountered. 1013 */ 1014 static SQLITE_NOINLINE char *strAccumFinishRealloc(StrAccum *p){ 1015 char *zText; 1016 assert( p->mxAlloc>0 && !isMalloced(p) ); 1017 zText = sqlite3DbMallocRaw(p->db, p->nChar+1 ); 1018 if( zText ){ 1019 memcpy(zText, p->zText, p->nChar+1); 1020 p->printfFlags |= SQLITE_PRINTF_MALLOCED; 1021 }else{ 1022 setStrAccumError(p, SQLITE_NOMEM); 1023 } 1024 p->zText = zText; 1025 return zText; 1026 } 1027 char *sqlite3StrAccumFinish(StrAccum *p){ 1028 if( p->zText ){ 1029 p->zText[p->nChar] = 0; 1030 if( p->mxAlloc>0 && !isMalloced(p) ){ 1031 return strAccumFinishRealloc(p); 1032 } 1033 } 1034 return p->zText; 1035 } 1036 1037 /* 1038 ** This singleton is an sqlite3_str object that is returned if 1039 ** sqlite3_malloc() fails to provide space for a real one. This 1040 ** sqlite3_str object accepts no new text and always returns 1041 ** an SQLITE_NOMEM error. 1042 */ 1043 static sqlite3_str sqlite3OomStr = { 1044 0, 0, 0, 0, 0, SQLITE_NOMEM, 0 1045 }; 1046 1047 /* Finalize a string created using sqlite3_str_new(). 1048 */ 1049 char *sqlite3_str_finish(sqlite3_str *p){ 1050 char *z; 1051 if( p!=0 && p!=&sqlite3OomStr ){ 1052 z = sqlite3StrAccumFinish(p); 1053 sqlite3_free(p); 1054 }else{ 1055 z = 0; 1056 } 1057 return z; 1058 } 1059 1060 /* Return any error code associated with p */ 1061 int sqlite3_str_errcode(sqlite3_str *p){ 1062 return p ? p->accError : SQLITE_NOMEM; 1063 } 1064 1065 /* Return the current length of p in bytes */ 1066 int sqlite3_str_length(sqlite3_str *p){ 1067 return p ? p->nChar : 0; 1068 } 1069 1070 /* Return the current value for p */ 1071 char *sqlite3_str_value(sqlite3_str *p){ 1072 if( p==0 || p->nChar==0 ) return 0; 1073 p->zText[p->nChar] = 0; 1074 return p->zText; 1075 } 1076 1077 /* 1078 ** Reset an StrAccum string. Reclaim all malloced memory. 1079 */ 1080 void sqlite3_str_reset(StrAccum *p){ 1081 if( isMalloced(p) ){ 1082 sqlite3DbFree(p->db, p->zText); 1083 p->printfFlags &= ~SQLITE_PRINTF_MALLOCED; 1084 } 1085 p->nAlloc = 0; 1086 p->nChar = 0; 1087 p->zText = 0; 1088 } 1089 1090 /* 1091 ** Initialize a string accumulator. 1092 ** 1093 ** p: The accumulator to be initialized. 1094 ** db: Pointer to a database connection. May be NULL. Lookaside 1095 ** memory is used if not NULL. db->mallocFailed is set appropriately 1096 ** when not NULL. 1097 ** zBase: An initial buffer. May be NULL in which case the initial buffer 1098 ** is malloced. 1099 ** n: Size of zBase in bytes. If total space requirements never exceed 1100 ** n then no memory allocations ever occur. 1101 ** mx: Maximum number of bytes to accumulate. If mx==0 then no memory 1102 ** allocations will ever occur. 1103 */ 1104 void sqlite3StrAccumInit(StrAccum *p, sqlite3 *db, char *zBase, int n, int mx){ 1105 p->zText = zBase; 1106 p->db = db; 1107 p->nAlloc = n; 1108 p->mxAlloc = mx; 1109 p->nChar = 0; 1110 p->accError = 0; 1111 p->printfFlags = 0; 1112 } 1113 1114 /* Allocate and initialize a new dynamic string object */ 1115 sqlite3_str *sqlite3_str_new(sqlite3 *db){ 1116 sqlite3_str *p = sqlite3_malloc64(sizeof(*p)); 1117 if( p ){ 1118 sqlite3StrAccumInit(p, 0, 0, 0, 1119 db ? db->aLimit[SQLITE_LIMIT_LENGTH] : SQLITE_MAX_LENGTH); 1120 }else{ 1121 p = &sqlite3OomStr; 1122 } 1123 return p; 1124 } 1125 1126 /* 1127 ** Print into memory obtained from sqliteMalloc(). Use the internal 1128 ** %-conversion extensions. 1129 */ 1130 char *sqlite3VMPrintf(sqlite3 *db, const char *zFormat, va_list ap){ 1131 char *z; 1132 char zBase[SQLITE_PRINT_BUF_SIZE]; 1133 StrAccum acc; 1134 assert( db!=0 ); 1135 sqlite3StrAccumInit(&acc, db, zBase, sizeof(zBase), 1136 db->aLimit[SQLITE_LIMIT_LENGTH]); 1137 acc.printfFlags = SQLITE_PRINTF_INTERNAL; 1138 sqlite3_str_vappendf(&acc, zFormat, ap); 1139 z = sqlite3StrAccumFinish(&acc); 1140 if( acc.accError==SQLITE_NOMEM ){ 1141 sqlite3OomFault(db); 1142 } 1143 return z; 1144 } 1145 1146 /* 1147 ** Print into memory obtained from sqliteMalloc(). Use the internal 1148 ** %-conversion extensions. 1149 */ 1150 char *sqlite3MPrintf(sqlite3 *db, const char *zFormat, ...){ 1151 va_list ap; 1152 char *z; 1153 va_start(ap, zFormat); 1154 z = sqlite3VMPrintf(db, zFormat, ap); 1155 va_end(ap); 1156 return z; 1157 } 1158 1159 /* 1160 ** Print into memory obtained from sqlite3_malloc(). Omit the internal 1161 ** %-conversion extensions. 1162 */ 1163 char *sqlite3_vmprintf(const char *zFormat, va_list ap){ 1164 char *z; 1165 char zBase[SQLITE_PRINT_BUF_SIZE]; 1166 StrAccum acc; 1167 1168 #ifdef SQLITE_ENABLE_API_ARMOR 1169 if( zFormat==0 ){ 1170 (void)SQLITE_MISUSE_BKPT; 1171 return 0; 1172 } 1173 #endif 1174 #ifndef SQLITE_OMIT_AUTOINIT 1175 if( sqlite3_initialize() ) return 0; 1176 #endif 1177 sqlite3StrAccumInit(&acc, 0, zBase, sizeof(zBase), SQLITE_MAX_LENGTH); 1178 sqlite3_str_vappendf(&acc, zFormat, ap); 1179 z = sqlite3StrAccumFinish(&acc); 1180 return z; 1181 } 1182 1183 /* 1184 ** Print into memory obtained from sqlite3_malloc()(). Omit the internal 1185 ** %-conversion extensions. 1186 */ 1187 char *sqlite3_mprintf(const char *zFormat, ...){ 1188 va_list ap; 1189 char *z; 1190 #ifndef SQLITE_OMIT_AUTOINIT 1191 if( sqlite3_initialize() ) return 0; 1192 #endif 1193 va_start(ap, zFormat); 1194 z = sqlite3_vmprintf(zFormat, ap); 1195 va_end(ap); 1196 return z; 1197 } 1198 1199 /* 1200 ** sqlite3_snprintf() works like snprintf() except that it ignores the 1201 ** current locale settings. This is important for SQLite because we 1202 ** are not able to use a "," as the decimal point in place of "." as 1203 ** specified by some locales. 1204 ** 1205 ** Oops: The first two arguments of sqlite3_snprintf() are backwards 1206 ** from the snprintf() standard. Unfortunately, it is too late to change 1207 ** this without breaking compatibility, so we just have to live with the 1208 ** mistake. 1209 ** 1210 ** sqlite3_vsnprintf() is the varargs version. 1211 */ 1212 char *sqlite3_vsnprintf(int n, char *zBuf, const char *zFormat, va_list ap){ 1213 StrAccum acc; 1214 if( n<=0 ) return zBuf; 1215 #ifdef SQLITE_ENABLE_API_ARMOR 1216 if( zBuf==0 || zFormat==0 ) { 1217 (void)SQLITE_MISUSE_BKPT; 1218 if( zBuf ) zBuf[0] = 0; 1219 return zBuf; 1220 } 1221 #endif 1222 sqlite3StrAccumInit(&acc, 0, zBuf, n, 0); 1223 sqlite3_str_vappendf(&acc, zFormat, ap); 1224 zBuf[acc.nChar] = 0; 1225 return zBuf; 1226 } 1227 char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){ 1228 char *z; 1229 va_list ap; 1230 va_start(ap,zFormat); 1231 z = sqlite3_vsnprintf(n, zBuf, zFormat, ap); 1232 va_end(ap); 1233 return z; 1234 } 1235 1236 /* 1237 ** This is the routine that actually formats the sqlite3_log() message. 1238 ** We house it in a separate routine from sqlite3_log() to avoid using 1239 ** stack space on small-stack systems when logging is disabled. 1240 ** 1241 ** sqlite3_log() must render into a static buffer. It cannot dynamically 1242 ** allocate memory because it might be called while the memory allocator 1243 ** mutex is held. 1244 ** 1245 ** sqlite3_str_vappendf() might ask for *temporary* memory allocations for 1246 ** certain format characters (%q) or for very large precisions or widths. 1247 ** Care must be taken that any sqlite3_log() calls that occur while the 1248 ** memory mutex is held do not use these mechanisms. 1249 */ 1250 static void renderLogMsg(int iErrCode, const char *zFormat, va_list ap){ 1251 StrAccum acc; /* String accumulator */ 1252 char zMsg[SQLITE_PRINT_BUF_SIZE*3]; /* Complete log message */ 1253 1254 sqlite3StrAccumInit(&acc, 0, zMsg, sizeof(zMsg), 0); 1255 sqlite3_str_vappendf(&acc, zFormat, ap); 1256 sqlite3GlobalConfig.xLog(sqlite3GlobalConfig.pLogArg, iErrCode, 1257 sqlite3StrAccumFinish(&acc)); 1258 } 1259 1260 /* 1261 ** Format and write a message to the log if logging is enabled. 1262 */ 1263 void sqlite3_log(int iErrCode, const char *zFormat, ...){ 1264 va_list ap; /* Vararg list */ 1265 if( sqlite3GlobalConfig.xLog ){ 1266 va_start(ap, zFormat); 1267 renderLogMsg(iErrCode, zFormat, ap); 1268 va_end(ap); 1269 } 1270 } 1271 1272 #if defined(SQLITE_DEBUG) || defined(SQLITE_HAVE_OS_TRACE) 1273 /* 1274 ** A version of printf() that understands %lld. Used for debugging. 1275 ** The printf() built into some versions of windows does not understand %lld 1276 ** and segfaults if you give it a long long int. 1277 */ 1278 void sqlite3DebugPrintf(const char *zFormat, ...){ 1279 va_list ap; 1280 StrAccum acc; 1281 char zBuf[SQLITE_PRINT_BUF_SIZE*10]; 1282 sqlite3StrAccumInit(&acc, 0, zBuf, sizeof(zBuf), 0); 1283 va_start(ap,zFormat); 1284 sqlite3_str_vappendf(&acc, zFormat, ap); 1285 va_end(ap); 1286 sqlite3StrAccumFinish(&acc); 1287 #ifdef SQLITE_OS_TRACE_PROC 1288 { 1289 extern void SQLITE_OS_TRACE_PROC(const char *zBuf, int nBuf); 1290 SQLITE_OS_TRACE_PROC(zBuf, sizeof(zBuf)); 1291 } 1292 #else 1293 fprintf(stdout,"%s", zBuf); 1294 fflush(stdout); 1295 #endif 1296 } 1297 #endif 1298 1299 1300 /* 1301 ** variable-argument wrapper around sqlite3_str_vappendf(). The bFlags argument 1302 ** can contain the bit SQLITE_PRINTF_INTERNAL enable internal formats. 1303 */ 1304 void sqlite3_str_appendf(StrAccum *p, const char *zFormat, ...){ 1305 va_list ap; 1306 va_start(ap,zFormat); 1307 sqlite3_str_vappendf(p, zFormat, ap); 1308 va_end(ap); 1309 } 1310