1 /* 2 ** The "printf" code that follows dates from the 1980's. It is in 3 ** the public domain. The original comments are included here for 4 ** completeness. They are very out-of-date but might be useful as 5 ** an historical reference. Most of the "enhancements" have been backed 6 ** out so that the functionality is now the same as standard printf(). 7 ** 8 ************************************************************************** 9 ** 10 ** The following modules is an enhanced replacement for the "printf" subroutines 11 ** found in the standard C library. The following enhancements are 12 ** supported: 13 ** 14 ** + Additional functions. The standard set of "printf" functions 15 ** includes printf, fprintf, sprintf, vprintf, vfprintf, and 16 ** vsprintf. This module adds the following: 17 ** 18 ** * snprintf -- Works like sprintf, but has an extra argument 19 ** which is the size of the buffer written to. 20 ** 21 ** * mprintf -- Similar to sprintf. Writes output to memory 22 ** obtained from malloc. 23 ** 24 ** * xprintf -- Calls a function to dispose of output. 25 ** 26 ** * nprintf -- No output, but returns the number of characters 27 ** that would have been output by printf. 28 ** 29 ** * A v- version (ex: vsnprintf) of every function is also 30 ** supplied. 31 ** 32 ** + A few extensions to the formatting notation are supported: 33 ** 34 ** * The "=" flag (similar to "-") causes the output to be 35 ** be centered in the appropriately sized field. 36 ** 37 ** * The %b field outputs an integer in binary notation. 38 ** 39 ** * The %c field now accepts a precision. The character output 40 ** is repeated by the number of times the precision specifies. 41 ** 42 ** * The %' field works like %c, but takes as its character the 43 ** next character of the format string, instead of the next 44 ** argument. For example, printf("%.78'-") prints 78 minus 45 ** signs, the same as printf("%.78c",'-'). 46 ** 47 ** + When compiled using GCC on a SPARC, this version of printf is 48 ** faster than the library printf for SUN OS 4.1. 49 ** 50 ** + All functions are fully reentrant. 51 ** 52 */ 53 #include "sqliteInt.h" 54 #include <math.h> 55 56 /* 57 ** Conversion types fall into various categories as defined by the 58 ** following enumeration. 59 */ 60 #define etRADIX 1 /* Integer types. %d, %x, %o, and so forth */ 61 #define etFLOAT 2 /* Floating point. %f */ 62 #define etEXP 3 /* Exponentional notation. %e and %E */ 63 #define etGENERIC 4 /* Floating or exponential, depending on exponent. %g */ 64 #define etSIZE 5 /* Return number of characters processed so far. %n */ 65 #define etSTRING 6 /* Strings. %s */ 66 #define etDYNSTRING 7 /* Dynamically allocated strings. %z */ 67 #define etPERCENT 8 /* Percent symbol. %% */ 68 #define etCHARX 9 /* Characters. %c */ 69 /* The rest are extensions, not normally found in printf() */ 70 #define etCHARLIT 10 /* Literal characters. %' */ 71 #define etSQLESCAPE 11 /* Strings with '\'' doubled. %q */ 72 #define etSQLESCAPE2 12 /* Strings with '\'' doubled and enclosed in '', 73 NULL pointers replaced by SQL NULL. %Q */ 74 #define etTOKEN 13 /* a pointer to a Token structure */ 75 #define etSRCLIST 14 /* a pointer to a SrcList */ 76 #define etPOINTER 15 /* The %p conversion */ 77 78 79 /* 80 ** An "etByte" is an 8-bit unsigned value. 81 */ 82 typedef unsigned char etByte; 83 84 /* 85 ** Each builtin conversion character (ex: the 'd' in "%d") is described 86 ** by an instance of the following structure 87 */ 88 typedef struct et_info { /* Information about each format field */ 89 char fmttype; /* The format field code letter */ 90 etByte base; /* The base for radix conversion */ 91 etByte flags; /* One or more of FLAG_ constants below */ 92 etByte type; /* Conversion paradigm */ 93 etByte charset; /* Offset into aDigits[] of the digits string */ 94 etByte prefix; /* Offset into aPrefix[] of the prefix string */ 95 } et_info; 96 97 /* 98 ** Allowed values for et_info.flags 99 */ 100 #define FLAG_SIGNED 1 /* True if the value to convert is signed */ 101 #define FLAG_INTERN 2 /* True if for internal use only */ 102 #define FLAG_STRING 4 /* Allow infinity precision */ 103 104 105 /* 106 ** The following table is searched linearly, so it is good to put the 107 ** most frequently used conversion types first. 108 */ 109 static const char aDigits[] = "0123456789ABCDEF0123456789abcdef"; 110 static const char aPrefix[] = "-x0\000X0"; 111 static const et_info fmtinfo[] = { 112 { 'd', 10, 1, etRADIX, 0, 0 }, 113 { 's', 0, 4, etSTRING, 0, 0 }, 114 { 'g', 0, 1, etGENERIC, 30, 0 }, 115 { 'z', 0, 6, etDYNSTRING, 0, 0 }, 116 { 'q', 0, 4, etSQLESCAPE, 0, 0 }, 117 { 'Q', 0, 4, etSQLESCAPE2, 0, 0 }, 118 { 'c', 0, 0, etCHARX, 0, 0 }, 119 { 'o', 8, 0, etRADIX, 0, 2 }, 120 { 'u', 10, 0, etRADIX, 0, 0 }, 121 { 'x', 16, 0, etRADIX, 16, 1 }, 122 { 'X', 16, 0, etRADIX, 0, 4 }, 123 #ifndef SQLITE_OMIT_FLOATING_POINT 124 { 'f', 0, 1, etFLOAT, 0, 0 }, 125 { 'e', 0, 1, etEXP, 30, 0 }, 126 { 'E', 0, 1, etEXP, 14, 0 }, 127 { 'G', 0, 1, etGENERIC, 14, 0 }, 128 #endif 129 { 'i', 10, 1, etRADIX, 0, 0 }, 130 { 'n', 0, 0, etSIZE, 0, 0 }, 131 { '%', 0, 0, etPERCENT, 0, 0 }, 132 { 'p', 16, 0, etPOINTER, 0, 1 }, 133 { 'T', 0, 2, etTOKEN, 0, 0 }, 134 { 'S', 0, 2, etSRCLIST, 0, 0 }, 135 }; 136 #define etNINFO (sizeof(fmtinfo)/sizeof(fmtinfo[0])) 137 138 /* 139 ** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point 140 ** conversions will work. 141 */ 142 #ifndef SQLITE_OMIT_FLOATING_POINT 143 /* 144 ** "*val" is a double such that 0.1 <= *val < 10.0 145 ** Return the ascii code for the leading digit of *val, then 146 ** multiply "*val" by 10.0 to renormalize. 147 ** 148 ** Example: 149 ** input: *val = 3.14159 150 ** output: *val = 1.4159 function return = '3' 151 ** 152 ** The counter *cnt is incremented each time. After counter exceeds 153 ** 16 (the number of significant digits in a 64-bit float) '0' is 154 ** always returned. 155 */ 156 static int et_getdigit(LONGDOUBLE_TYPE *val, int *cnt){ 157 int digit; 158 LONGDOUBLE_TYPE d; 159 if( (*cnt)++ >= 16 ) return '0'; 160 digit = (int)*val; 161 d = digit; 162 digit += '0'; 163 *val = (*val - d)*10.0; 164 return digit; 165 } 166 #endif /* SQLITE_OMIT_FLOATING_POINT */ 167 168 /* 169 ** On machines with a small stack size, you can redefine the 170 ** SQLITE_PRINT_BUF_SIZE to be less than 350. But beware - for 171 ** smaller values some %f conversions may go into an infinite loop. 172 */ 173 #ifndef SQLITE_PRINT_BUF_SIZE 174 # define SQLITE_PRINT_BUF_SIZE 350 175 #endif 176 #define etBUFSIZE SQLITE_PRINT_BUF_SIZE /* Size of the output buffer */ 177 178 /* 179 ** The root program. All variations call this core. 180 ** 181 ** INPUTS: 182 ** func This is a pointer to a function taking three arguments 183 ** 1. A pointer to anything. Same as the "arg" parameter. 184 ** 2. A pointer to the list of characters to be output 185 ** (Note, this list is NOT null terminated.) 186 ** 3. An integer number of characters to be output. 187 ** (Note: This number might be zero.) 188 ** 189 ** arg This is the pointer to anything which will be passed as the 190 ** first argument to "func". Use it for whatever you like. 191 ** 192 ** fmt This is the format string, as in the usual print. 193 ** 194 ** ap This is a pointer to a list of arguments. Same as in 195 ** vfprint. 196 ** 197 ** OUTPUTS: 198 ** The return value is the total number of characters sent to 199 ** the function "func". Returns -1 on a error. 200 ** 201 ** Note that the order in which automatic variables are declared below 202 ** seems to make a big difference in determining how fast this beast 203 ** will run. 204 */ 205 static int vxprintf( 206 void (*func)(void*,const char*,int), /* Consumer of text */ 207 void *arg, /* First argument to the consumer */ 208 int useExtended, /* Allow extended %-conversions */ 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 count; /* Total number of characters output */ 218 int width; /* Width of the current field */ 219 etByte flag_leftjustify; /* True if "-" flag is present */ 220 etByte flag_plussign; /* True if "+" flag is present */ 221 etByte flag_blanksign; /* True if " " flag is present */ 222 etByte flag_alternateform; /* True if "#" flag is present */ 223 etByte flag_altform2; /* True if "!" flag is present */ 224 etByte flag_zeropad; /* True if field width constant starts with zero */ 225 etByte flag_long; /* True if "l" flag is present */ 226 etByte flag_longlong; /* True if the "ll" flag is present */ 227 etByte done; /* Loop termination flag */ 228 sqlite_uint64 longvalue; /* Value for integer types */ 229 LONGDOUBLE_TYPE realvalue; /* Value for real types */ 230 const et_info *infop; /* Pointer to the appropriate info structure */ 231 char buf[etBUFSIZE]; /* Conversion buffer */ 232 char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */ 233 etByte errorflag = 0; /* True if an error is encountered */ 234 etByte xtype; /* Conversion paradigm */ 235 char *zExtra; /* Extra memory used for etTCLESCAPE conversions */ 236 static const char spaces[] = 237 " "; 238 #define etSPACESIZE (sizeof(spaces)-1) 239 #ifndef SQLITE_OMIT_FLOATING_POINT 240 int exp, e2; /* exponent of real numbers */ 241 double rounder; /* Used for rounding floating point values */ 242 etByte flag_dp; /* True if decimal point should be shown */ 243 etByte flag_rtz; /* True if trailing zeros should be removed */ 244 etByte flag_exp; /* True to force display of the exponent */ 245 int nsd; /* Number of significant digits returned */ 246 #endif 247 248 func(arg,"",0); 249 count = length = 0; 250 bufpt = 0; 251 for(; (c=(*fmt))!=0; ++fmt){ 252 if( c!='%' ){ 253 int amt; 254 bufpt = (char *)fmt; 255 amt = 1; 256 while( (c=(*++fmt))!='%' && c!=0 ) amt++; 257 (*func)(arg,bufpt,amt); 258 count += amt; 259 if( c==0 ) break; 260 } 261 if( (c=(*++fmt))==0 ){ 262 errorflag = 1; 263 (*func)(arg,"%",1); 264 count++; 265 break; 266 } 267 /* Find out what flags are present */ 268 flag_leftjustify = flag_plussign = flag_blanksign = 269 flag_alternateform = flag_altform2 = flag_zeropad = 0; 270 done = 0; 271 do{ 272 switch( c ){ 273 case '-': flag_leftjustify = 1; break; 274 case '+': flag_plussign = 1; break; 275 case ' ': flag_blanksign = 1; break; 276 case '#': flag_alternateform = 1; break; 277 case '!': flag_altform2 = 1; break; 278 case '0': flag_zeropad = 1; break; 279 default: done = 1; break; 280 } 281 }while( !done && (c=(*++fmt))!=0 ); 282 /* Get the field width */ 283 width = 0; 284 if( c=='*' ){ 285 width = va_arg(ap,int); 286 if( width<0 ){ 287 flag_leftjustify = 1; 288 width = -width; 289 } 290 c = *++fmt; 291 }else{ 292 while( c>='0' && c<='9' ){ 293 width = width*10 + c - '0'; 294 c = *++fmt; 295 } 296 } 297 if( width > etBUFSIZE-10 ){ 298 width = etBUFSIZE-10; 299 } 300 /* Get the precision */ 301 if( c=='.' ){ 302 precision = 0; 303 c = *++fmt; 304 if( c=='*' ){ 305 precision = va_arg(ap,int); 306 if( precision<0 ) precision = -precision; 307 c = *++fmt; 308 }else{ 309 while( c>='0' && c<='9' ){ 310 precision = precision*10 + c - '0'; 311 c = *++fmt; 312 } 313 } 314 }else{ 315 precision = -1; 316 } 317 /* Get the conversion type modifier */ 318 if( c=='l' ){ 319 flag_long = 1; 320 c = *++fmt; 321 if( c=='l' ){ 322 flag_longlong = 1; 323 c = *++fmt; 324 }else{ 325 flag_longlong = 0; 326 } 327 }else{ 328 flag_long = flag_longlong = 0; 329 } 330 /* Fetch the info entry for the field */ 331 infop = 0; 332 for(idx=0; idx<etNINFO; idx++){ 333 if( c==fmtinfo[idx].fmttype ){ 334 infop = &fmtinfo[idx]; 335 if( useExtended || (infop->flags & FLAG_INTERN)==0 ){ 336 xtype = infop->type; 337 }else{ 338 return -1; 339 } 340 break; 341 } 342 } 343 zExtra = 0; 344 if( infop==0 ){ 345 return -1; 346 } 347 348 349 /* Limit the precision to prevent overflowing buf[] during conversion */ 350 if( precision>etBUFSIZE-40 && (infop->flags & FLAG_STRING)==0 ){ 351 precision = etBUFSIZE-40; 352 } 353 354 /* 355 ** At this point, variables are initialized as follows: 356 ** 357 ** flag_alternateform TRUE if a '#' is present. 358 ** flag_altform2 TRUE if a '!' is present. 359 ** flag_plussign TRUE if a '+' is present. 360 ** flag_leftjustify TRUE if a '-' is present or if the 361 ** field width was negative. 362 ** flag_zeropad TRUE if the width began with 0. 363 ** flag_long TRUE if the letter 'l' (ell) prefixed 364 ** the conversion character. 365 ** flag_longlong TRUE if the letter 'll' (ell ell) prefixed 366 ** the conversion character. 367 ** flag_blanksign TRUE if a ' ' is present. 368 ** width The specified field width. This is 369 ** always non-negative. Zero is the default. 370 ** precision The specified precision. The default 371 ** is -1. 372 ** xtype The class of the conversion. 373 ** infop Pointer to the appropriate info struct. 374 */ 375 switch( xtype ){ 376 case etPOINTER: 377 flag_longlong = sizeof(char*)==sizeof(i64); 378 flag_long = sizeof(char*)==sizeof(long int); 379 /* Fall through into the next case */ 380 case etRADIX: 381 if( infop->flags & FLAG_SIGNED ){ 382 i64 v; 383 if( flag_longlong ) v = va_arg(ap,i64); 384 else if( flag_long ) v = va_arg(ap,long int); 385 else v = va_arg(ap,int); 386 if( v<0 ){ 387 longvalue = -v; 388 prefix = '-'; 389 }else{ 390 longvalue = v; 391 if( flag_plussign ) prefix = '+'; 392 else if( flag_blanksign ) prefix = ' '; 393 else prefix = 0; 394 } 395 }else{ 396 if( flag_longlong ) longvalue = va_arg(ap,u64); 397 else if( flag_long ) longvalue = va_arg(ap,unsigned long int); 398 else longvalue = va_arg(ap,unsigned int); 399 prefix = 0; 400 } 401 if( longvalue==0 ) flag_alternateform = 0; 402 if( flag_zeropad && precision<width-(prefix!=0) ){ 403 precision = width-(prefix!=0); 404 } 405 bufpt = &buf[etBUFSIZE-1]; 406 { 407 register const char *cset; /* Use registers for speed */ 408 register int base; 409 cset = &aDigits[infop->charset]; 410 base = infop->base; 411 do{ /* Convert to ascii */ 412 *(--bufpt) = cset[longvalue%base]; 413 longvalue = longvalue/base; 414 }while( longvalue>0 ); 415 } 416 length = &buf[etBUFSIZE-1]-bufpt; 417 for(idx=precision-length; idx>0; idx--){ 418 *(--bufpt) = '0'; /* Zero pad */ 419 } 420 if( prefix ) *(--bufpt) = prefix; /* Add sign */ 421 if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */ 422 const char *pre; 423 char x; 424 pre = &aPrefix[infop->prefix]; 425 if( *bufpt!=pre[0] ){ 426 for(; (x=(*pre))!=0; pre++) *(--bufpt) = x; 427 } 428 } 429 length = &buf[etBUFSIZE-1]-bufpt; 430 break; 431 case etFLOAT: 432 case etEXP: 433 case etGENERIC: 434 realvalue = va_arg(ap,double); 435 #ifndef SQLITE_OMIT_FLOATING_POINT 436 if( precision<0 ) precision = 6; /* Set default precision */ 437 if( precision>etBUFSIZE/2-10 ) precision = etBUFSIZE/2-10; 438 if( realvalue<0.0 ){ 439 realvalue = -realvalue; 440 prefix = '-'; 441 }else{ 442 if( flag_plussign ) prefix = '+'; 443 else if( flag_blanksign ) prefix = ' '; 444 else prefix = 0; 445 } 446 if( xtype==etGENERIC && precision>0 ) precision--; 447 #if 0 448 /* Rounding works like BSD when the constant 0.4999 is used. Wierd! */ 449 for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1); 450 #else 451 /* It makes more sense to use 0.5 */ 452 for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){} 453 #endif 454 if( xtype==etFLOAT ) realvalue += rounder; 455 /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */ 456 exp = 0; 457 if( isnan(realvalue) ){ 458 bufpt = "NaN"; 459 length = 3; 460 break; 461 } 462 if( realvalue>0.0 ){ 463 while( realvalue>=1e32 && exp<=350 ){ realvalue *= 1e-32; exp+=32; } 464 while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; } 465 while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; } 466 while( realvalue<1e-8 && exp>=-350 ){ realvalue *= 1e8; exp-=8; } 467 while( realvalue<1.0 && exp>=-350 ){ realvalue *= 10.0; exp--; } 468 if( exp>350 || exp<-350 ){ 469 if( prefix=='-' ){ 470 bufpt = "-Inf"; 471 }else if( prefix=='+' ){ 472 bufpt = "+Inf"; 473 }else{ 474 bufpt = "Inf"; 475 } 476 length = strlen(bufpt); 477 break; 478 } 479 } 480 bufpt = buf; 481 /* 482 ** If the field type is etGENERIC, then convert to either etEXP 483 ** or etFLOAT, as appropriate. 484 */ 485 flag_exp = xtype==etEXP; 486 if( xtype!=etFLOAT ){ 487 realvalue += rounder; 488 if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; } 489 } 490 if( xtype==etGENERIC ){ 491 flag_rtz = !flag_alternateform; 492 if( exp<-4 || exp>precision ){ 493 xtype = etEXP; 494 }else{ 495 precision = precision - exp; 496 xtype = etFLOAT; 497 } 498 }else{ 499 flag_rtz = 0; 500 } 501 if( xtype==etEXP ){ 502 e2 = 0; 503 }else{ 504 e2 = exp; 505 } 506 nsd = 0; 507 flag_dp = (precision>0) | flag_alternateform | flag_altform2; 508 /* The sign in front of the number */ 509 if( prefix ){ 510 *(bufpt++) = prefix; 511 } 512 /* Digits prior to the decimal point */ 513 if( e2<0 ){ 514 *(bufpt++) = '0'; 515 }else{ 516 for(; e2>=0; e2--){ 517 *(bufpt++) = et_getdigit(&realvalue,&nsd); 518 } 519 } 520 /* The decimal point */ 521 if( flag_dp ){ 522 *(bufpt++) = '.'; 523 } 524 /* "0" digits after the decimal point but before the first 525 ** significant digit of the number */ 526 for(e2++; e2<0 && precision>0; precision--, e2++){ 527 *(bufpt++) = '0'; 528 } 529 /* Significant digits after the decimal point */ 530 while( (precision--)>0 ){ 531 *(bufpt++) = et_getdigit(&realvalue,&nsd); 532 } 533 /* Remove trailing zeros and the "." if no digits follow the "." */ 534 if( flag_rtz && flag_dp ){ 535 while( bufpt[-1]=='0' ) *(--bufpt) = 0; 536 assert( bufpt>buf ); 537 if( bufpt[-1]=='.' ){ 538 if( flag_altform2 ){ 539 *(bufpt++) = '0'; 540 }else{ 541 *(--bufpt) = 0; 542 } 543 } 544 } 545 /* Add the "eNNN" suffix */ 546 if( flag_exp || (xtype==etEXP && exp) ){ 547 *(bufpt++) = aDigits[infop->charset]; 548 if( exp<0 ){ 549 *(bufpt++) = '-'; exp = -exp; 550 }else{ 551 *(bufpt++) = '+'; 552 } 553 if( exp>=100 ){ 554 *(bufpt++) = (exp/100)+'0'; /* 100's digit */ 555 exp %= 100; 556 } 557 *(bufpt++) = exp/10+'0'; /* 10's digit */ 558 *(bufpt++) = exp%10+'0'; /* 1's digit */ 559 } 560 *bufpt = 0; 561 562 /* The converted number is in buf[] and zero terminated. Output it. 563 ** Note that the number is in the usual order, not reversed as with 564 ** integer conversions. */ 565 length = bufpt-buf; 566 bufpt = buf; 567 568 /* Special case: Add leading zeros if the flag_zeropad flag is 569 ** set and we are not left justified */ 570 if( flag_zeropad && !flag_leftjustify && length < width){ 571 int i; 572 int nPad = width - length; 573 for(i=width; i>=nPad; i--){ 574 bufpt[i] = bufpt[i-nPad]; 575 } 576 i = prefix!=0; 577 while( nPad-- ) bufpt[i++] = '0'; 578 length = width; 579 } 580 #endif 581 break; 582 case etSIZE: 583 *(va_arg(ap,int*)) = count; 584 length = width = 0; 585 break; 586 case etPERCENT: 587 buf[0] = '%'; 588 bufpt = buf; 589 length = 1; 590 break; 591 case etCHARLIT: 592 case etCHARX: 593 c = buf[0] = (xtype==etCHARX ? va_arg(ap,int) : *++fmt); 594 if( precision>=0 ){ 595 for(idx=1; idx<precision; idx++) buf[idx] = c; 596 length = precision; 597 }else{ 598 length =1; 599 } 600 bufpt = buf; 601 break; 602 case etSTRING: 603 case etDYNSTRING: 604 bufpt = va_arg(ap,char*); 605 if( bufpt==0 ){ 606 bufpt = ""; 607 }else if( xtype==etDYNSTRING ){ 608 zExtra = bufpt; 609 } 610 length = strlen(bufpt); 611 if( precision>=0 && precision<length ) length = precision; 612 break; 613 case etSQLESCAPE: 614 case etSQLESCAPE2: { 615 int i, j, n, ch, isnull; 616 int needQuote; 617 char *escarg = va_arg(ap,char*); 618 isnull = escarg==0; 619 if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)"); 620 for(i=n=0; (ch=escarg[i])!=0; i++){ 621 if( ch=='\'' ) n++; 622 } 623 needQuote = !isnull && xtype==etSQLESCAPE2; 624 n += i + 1 + needQuote*2; 625 if( n>etBUFSIZE ){ 626 bufpt = zExtra = sqliteMalloc( n ); 627 if( bufpt==0 ) return -1; 628 }else{ 629 bufpt = buf; 630 } 631 j = 0; 632 if( needQuote ) bufpt[j++] = '\''; 633 for(i=0; (ch=escarg[i])!=0; i++){ 634 bufpt[j++] = ch; 635 if( ch=='\'' ) bufpt[j++] = ch; 636 } 637 if( needQuote ) bufpt[j++] = '\''; 638 bufpt[j] = 0; 639 length = j; 640 /* The precision is ignored on %q and %Q */ 641 /* if( precision>=0 && precision<length ) length = precision; */ 642 break; 643 } 644 case etTOKEN: { 645 Token *pToken = va_arg(ap, Token*); 646 if( pToken && pToken->z ){ 647 (*func)(arg, (char*)pToken->z, pToken->n); 648 } 649 length = width = 0; 650 break; 651 } 652 case etSRCLIST: { 653 SrcList *pSrc = va_arg(ap, SrcList*); 654 int k = va_arg(ap, int); 655 struct SrcList_item *pItem = &pSrc->a[k]; 656 assert( k>=0 && k<pSrc->nSrc ); 657 if( pItem->zDatabase && pItem->zDatabase[0] ){ 658 (*func)(arg, pItem->zDatabase, strlen(pItem->zDatabase)); 659 (*func)(arg, ".", 1); 660 } 661 (*func)(arg, pItem->zName, strlen(pItem->zName)); 662 length = width = 0; 663 break; 664 } 665 }/* End switch over the format type */ 666 /* 667 ** The text of the conversion is pointed to by "bufpt" and is 668 ** "length" characters long. The field width is "width". Do 669 ** the output. 670 */ 671 if( !flag_leftjustify ){ 672 register int nspace; 673 nspace = width-length; 674 if( nspace>0 ){ 675 count += nspace; 676 while( nspace>=etSPACESIZE ){ 677 (*func)(arg,spaces,etSPACESIZE); 678 nspace -= etSPACESIZE; 679 } 680 if( nspace>0 ) (*func)(arg,spaces,nspace); 681 } 682 } 683 if( length>0 ){ 684 (*func)(arg,bufpt,length); 685 count += length; 686 } 687 if( flag_leftjustify ){ 688 register int nspace; 689 nspace = width-length; 690 if( nspace>0 ){ 691 count += nspace; 692 while( nspace>=etSPACESIZE ){ 693 (*func)(arg,spaces,etSPACESIZE); 694 nspace -= etSPACESIZE; 695 } 696 if( nspace>0 ) (*func)(arg,spaces,nspace); 697 } 698 } 699 if( zExtra ){ 700 sqliteFree(zExtra); 701 } 702 }/* End for loop over the format string */ 703 return errorflag ? -1 : count; 704 } /* End of function */ 705 706 707 /* This structure is used to store state information about the 708 ** write to memory that is currently in progress. 709 */ 710 struct sgMprintf { 711 char *zBase; /* A base allocation */ 712 char *zText; /* The string collected so far */ 713 int nChar; /* Length of the string so far */ 714 int nTotal; /* Output size if unconstrained */ 715 int nAlloc; /* Amount of space allocated in zText */ 716 void *(*xRealloc)(void*,int); /* Function used to realloc memory */ 717 }; 718 719 /* 720 ** This function implements the callback from vxprintf. 721 ** 722 ** This routine add nNewChar characters of text in zNewText to 723 ** the sgMprintf structure pointed to by "arg". 724 */ 725 static void mout(void *arg, const char *zNewText, int nNewChar){ 726 struct sgMprintf *pM = (struct sgMprintf*)arg; 727 pM->nTotal += nNewChar; 728 if( pM->nChar + nNewChar + 1 > pM->nAlloc ){ 729 if( pM->xRealloc==0 ){ 730 nNewChar = pM->nAlloc - pM->nChar - 1; 731 }else{ 732 int nAlloc = pM->nChar + nNewChar*2 + 1; 733 if( pM->zText==pM->zBase ){ 734 pM->zText = pM->xRealloc(0, nAlloc); 735 if( pM->zText && pM->nChar ){ 736 memcpy(pM->zText, pM->zBase, pM->nChar); 737 } 738 }else{ 739 char *zNew; 740 zNew = pM->xRealloc(pM->zText, nAlloc); 741 if( zNew ){ 742 pM->zText = zNew; 743 }else{ 744 return; 745 } 746 } 747 pM->nAlloc = nAlloc; 748 } 749 } 750 if( pM->zText ){ 751 if( nNewChar>0 ){ 752 memcpy(&pM->zText[pM->nChar], zNewText, nNewChar); 753 pM->nChar += nNewChar; 754 } 755 pM->zText[pM->nChar] = 0; 756 } 757 } 758 759 /* 760 ** This routine is a wrapper around xprintf() that invokes mout() as 761 ** the consumer. 762 */ 763 static char *base_vprintf( 764 void *(*xRealloc)(void*,int), /* Routine to realloc memory. May be NULL */ 765 int useInternal, /* Use internal %-conversions if true */ 766 char *zInitBuf, /* Initially write here, before mallocing */ 767 int nInitBuf, /* Size of zInitBuf[] */ 768 const char *zFormat, /* format string */ 769 va_list ap /* arguments */ 770 ){ 771 struct sgMprintf sM; 772 sM.zBase = sM.zText = zInitBuf; 773 sM.nChar = sM.nTotal = 0; 774 sM.nAlloc = nInitBuf; 775 sM.xRealloc = xRealloc; 776 vxprintf(mout, &sM, useInternal, zFormat, ap); 777 if( xRealloc ){ 778 if( sM.zText==sM.zBase ){ 779 sM.zText = xRealloc(0, sM.nChar+1); 780 if( sM.zText ){ 781 memcpy(sM.zText, sM.zBase, sM.nChar+1); 782 } 783 }else if( sM.nAlloc>sM.nChar+10 ){ 784 char *zNew = xRealloc(sM.zText, sM.nChar+1); 785 if( zNew ){ 786 sM.zText = zNew; 787 } 788 } 789 } 790 return sM.zText; 791 } 792 793 /* 794 ** Realloc that is a real function, not a macro. 795 */ 796 static void *printf_realloc(void *old, int size){ 797 return sqliteRealloc(old,size); 798 } 799 800 /* 801 ** Print into memory obtained from sqliteMalloc(). Use the internal 802 ** %-conversion extensions. 803 */ 804 char *sqlite3VMPrintf(const char *zFormat, va_list ap){ 805 char zBase[SQLITE_PRINT_BUF_SIZE]; 806 return base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap); 807 } 808 809 /* 810 ** Print into memory obtained from sqliteMalloc(). Use the internal 811 ** %-conversion extensions. 812 */ 813 char *sqlite3MPrintf(const char *zFormat, ...){ 814 va_list ap; 815 char *z; 816 char zBase[SQLITE_PRINT_BUF_SIZE]; 817 va_start(ap, zFormat); 818 z = base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap); 819 va_end(ap); 820 return z; 821 } 822 823 /* 824 ** Print into memory obtained from sqlite3_malloc(). Omit the internal 825 ** %-conversion extensions. 826 */ 827 char *sqlite3_vmprintf(const char *zFormat, va_list ap){ 828 char zBase[SQLITE_PRINT_BUF_SIZE]; 829 return base_vprintf(sqlite3_realloc, 0, zBase, sizeof(zBase), zFormat, ap); 830 } 831 832 /* 833 ** Print into memory obtained from sqlite3_malloc()(). Omit the internal 834 ** %-conversion extensions. 835 */ 836 char *sqlite3_mprintf(const char *zFormat, ...){ 837 va_list ap; 838 char *z; 839 va_start(ap, zFormat); 840 z = sqlite3_vmprintf(zFormat, ap); 841 va_end(ap); 842 return z; 843 } 844 845 /* 846 ** sqlite3_snprintf() works like snprintf() except that it ignores the 847 ** current locale settings. This is important for SQLite because we 848 ** are not able to use a "," as the decimal point in place of "." as 849 ** specified by some locales. 850 */ 851 char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){ 852 char *z; 853 va_list ap; 854 855 if( n<=0 ){ 856 return zBuf; 857 } 858 zBuf[0] = 0; 859 va_start(ap,zFormat); 860 z = base_vprintf(0, 0, zBuf, n, zFormat, ap); 861 va_end(ap); 862 return z; 863 } 864 865 #if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) 866 /* 867 ** A version of printf() that understands %lld. Used for debugging. 868 ** The printf() built into some versions of windows does not understand %lld 869 ** and segfaults if you give it a long long int. 870 */ 871 void sqlite3DebugPrintf(const char *zFormat, ...){ 872 extern int getpid(void); 873 va_list ap; 874 char zBuf[500]; 875 va_start(ap, zFormat); 876 base_vprintf(0, 0, zBuf, sizeof(zBuf), zFormat, ap); 877 va_end(ap); 878 fprintf(stdout,"%s", zBuf); 879 fflush(stdout); 880 } 881 #endif 882