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 They are very out-of-date but might be useful as 5 ** an historical reference.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 55 /* 56 ** Conversion types fall into various categories as defined by the 57 ** following enumeration. 58 */ 59 #define etRADIX 1 /* Integer types. %d, %x, %o, and so forth */ 60 #define etFLOAT 2 /* Floating point. %f */ 61 #define etEXP 3 /* Exponentional notation. %e and %E */ 62 #define etGENERIC 4 /* Floating or exponential, depending on exponent. %g */ 63 #define etSIZE 5 /* Return number of characters processed so far. %n */ 64 #define etSTRING 6 /* Strings. %s */ 65 #define etDYNSTRING 7 /* Dynamically allocated strings. %z */ 66 #define etPERCENT 8 /* Percent symbol. %% */ 67 #define etCHARX 9 /* Characters. %c */ 68 /* The rest are extensions, not normally found in printf() */ 69 #define etCHARLIT 10 /* Literal characters. %' */ 70 #define etSQLESCAPE 11 /* Strings with '\'' doubled. %q */ 71 #define etSQLESCAPE2 12 /* Strings with '\'' doubled and enclosed in '', 72 NULL pointers replaced by SQL NULL. %Q */ 73 #define etTOKEN 13 /* a pointer to a Token structure */ 74 #define etSRCLIST 14 /* a pointer to a SrcList */ 75 #define etPOINTER 15 /* The %p conversion */ 76 77 78 /* 79 ** An "etByte" is an 8-bit unsigned value. 80 */ 81 typedef unsigned char etByte; 82 83 /* 84 ** Each builtin conversion character (ex: the 'd' in "%d") is described 85 ** by an instance of the following structure 86 */ 87 typedef struct et_info { /* Information about each format field */ 88 char fmttype; /* The format field code letter */ 89 etByte base; /* The base for radix conversion */ 90 etByte flags; /* One or more of FLAG_ constants below */ 91 etByte type; /* Conversion paradigm */ 92 etByte charset; /* Offset into aDigits[] of the digits string */ 93 etByte prefix; /* Offset into aPrefix[] of the prefix string */ 94 } et_info; 95 96 /* 97 ** Allowed values for et_info.flags 98 */ 99 #define FLAG_SIGNED 1 /* True if the value to convert is signed */ 100 #define FLAG_INTERN 2 /* True if for internal use only */ 101 #define FLAG_STRING 4 /* Allow infinity precision */ 102 103 104 /* 105 ** The following table is searched linearly, so it is good to put the 106 ** most frequently used conversion types first. 107 */ 108 static const char aDigits[] = "0123456789ABCDEF0123456789abcdef"; 109 static const char aPrefix[] = "-x0\000X0"; 110 static const et_info fmtinfo[] = { 111 { 'd', 10, 1, etRADIX, 0, 0 }, 112 { 's', 0, 4, etSTRING, 0, 0 }, 113 { 'g', 0, 1, etGENERIC, 30, 0 }, 114 { 'z', 0, 6, etDYNSTRING, 0, 0 }, 115 { 'q', 0, 4, etSQLESCAPE, 0, 0 }, 116 { 'Q', 0, 4, etSQLESCAPE2, 0, 0 }, 117 { 'c', 0, 0, etCHARX, 0, 0 }, 118 { 'o', 8, 0, etRADIX, 0, 2 }, 119 { 'u', 10, 0, etRADIX, 0, 0 }, 120 { 'x', 16, 0, etRADIX, 16, 1 }, 121 { 'X', 16, 0, etRADIX, 0, 4 }, 122 #ifndef SQLITE_OMIT_FLOATING_POINT 123 { 'f', 0, 1, etFLOAT, 0, 0 }, 124 { 'e', 0, 1, etEXP, 30, 0 }, 125 { 'E', 0, 1, etEXP, 14, 0 }, 126 { 'G', 0, 1, etGENERIC, 14, 0 }, 127 #endif 128 { 'i', 10, 1, etRADIX, 0, 0 }, 129 { 'n', 0, 0, etSIZE, 0, 0 }, 130 { '%', 0, 0, etPERCENT, 0, 0 }, 131 { 'p', 16, 0, etPOINTER, 0, 1 }, 132 { 'T', 0, 2, etTOKEN, 0, 0 }, 133 { 'S', 0, 2, etSRCLIST, 0, 0 }, 134 }; 135 #define etNINFO (sizeof(fmtinfo)/sizeof(fmtinfo[0])) 136 137 /* 138 ** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point 139 ** conversions will work. 140 */ 141 #ifndef SQLITE_OMIT_FLOATING_POINT 142 /* 143 ** "*val" is a double such that 0.1 <= *val < 10.0 144 ** Return the ascii code for the leading digit of *val, then 145 ** multiply "*val" by 10.0 to renormalize. 146 ** 147 ** Example: 148 ** input: *val = 3.14159 149 ** output: *val = 1.4159 function return = '3' 150 ** 151 ** The counter *cnt is incremented each time. After counter exceeds 152 ** 16 (the number of significant digits in a 64-bit float) '0' is 153 ** always returned. 154 */ 155 static int et_getdigit(LONGDOUBLE_TYPE *val, int *cnt){ 156 int digit; 157 LONGDOUBLE_TYPE d; 158 if( (*cnt)++ >= 16 ) return '0'; 159 digit = (int)*val; 160 d = digit; 161 digit += '0'; 162 *val = (*val - d)*10.0; 163 return digit; 164 } 165 #endif /* SQLITE_OMIT_FLOATING_POINT */ 166 167 /* 168 ** On machines with a small stack size, you can redefine the 169 ** SQLITE_PRINT_BUF_SIZE to be less than 350. But beware - for 170 ** smaller values some %f conversions may go into an infinite loop. 171 */ 172 #ifndef SQLITE_PRINT_BUF_SIZE 173 # define SQLITE_PRINT_BUF_SIZE 350 174 #endif 175 #define etBUFSIZE SQLITE_PRINT_BUF_SIZE /* Size of the output buffer */ 176 177 /* 178 ** The root program. All variations call this core. 179 ** 180 ** INPUTS: 181 ** func This is a pointer to a function taking three arguments 182 ** 1. A pointer to anything. Same as the "arg" parameter. 183 ** 2. A pointer to the list of characters to be output 184 ** (Note, this list is NOT null terminated.) 185 ** 3. An integer number of characters to be output. 186 ** (Note: This number might be zero.) 187 ** 188 ** arg This is the pointer to anything which will be passed as the 189 ** first argument to "func". Use it for whatever you like. 190 ** 191 ** fmt This is the format string, as in the usual print. 192 ** 193 ** ap This is a pointer to a list of arguments. Same as in 194 ** vfprint. 195 ** 196 ** OUTPUTS: 197 ** The return value is the total number of characters sent to 198 ** the function "func". Returns -1 on a error. 199 ** 200 ** Note that the order in which automatic variables are declared below 201 ** seems to make a big difference in determining how fast this beast 202 ** will run. 203 */ 204 static int vxprintf( 205 void (*func)(void*,const char*,int), /* Consumer of text */ 206 void *arg, /* First argument to the consumer */ 207 int useExtended, /* Allow extended %-conversions */ 208 const char *fmt, /* Format string */ 209 va_list ap /* arguments */ 210 ){ 211 int c; /* Next character in the format string */ 212 char *bufpt; /* Pointer to the conversion buffer */ 213 int precision; /* Precision of the current field */ 214 int length; /* Length of the field */ 215 int idx; /* A general purpose loop counter */ 216 int count; /* Total number of characters output */ 217 int width; /* Width of the current field */ 218 etByte flag_leftjustify; /* True if "-" flag is present */ 219 etByte flag_plussign; /* True if "+" flag is present */ 220 etByte flag_blanksign; /* True if " " flag is present */ 221 etByte flag_alternateform; /* True if "#" flag is present */ 222 etByte flag_altform2; /* True if "!" flag is present */ 223 etByte flag_zeropad; /* True if field width constant starts with zero */ 224 etByte flag_long; /* True if "l" flag is present */ 225 etByte flag_longlong; /* True if the "ll" flag is present */ 226 etByte done; /* Loop termination flag */ 227 sqlite_uint64 longvalue; /* Value for integer types */ 228 LONGDOUBLE_TYPE realvalue; /* Value for real types */ 229 const et_info *infop; /* Pointer to the appropriate info structure */ 230 char buf[etBUFSIZE]; /* Conversion buffer */ 231 char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */ 232 etByte errorflag = 0; /* True if an error is encountered */ 233 etByte xtype; /* Conversion paradigm */ 234 char *zExtra; /* Extra memory used for etTCLESCAPE conversions */ 235 static const char spaces[] = 236 " "; 237 #define etSPACESIZE (sizeof(spaces)-1) 238 #ifndef SQLITE_OMIT_FLOATING_POINT 239 int exp, e2; /* exponent of real numbers */ 240 double rounder; /* Used for rounding floating point values */ 241 etByte flag_dp; /* True if decimal point should be shown */ 242 etByte flag_rtz; /* True if trailing zeros should be removed */ 243 etByte flag_exp; /* True to force display of the exponent */ 244 int nsd; /* Number of significant digits returned */ 245 #endif 246 247 func(arg,"",0); 248 count = length = 0; 249 bufpt = 0; 250 for(; (c=(*fmt))!=0; ++fmt){ 251 if( c!='%' ){ 252 int amt; 253 bufpt = (char *)fmt; 254 amt = 1; 255 while( (c=(*++fmt))!='%' && c!=0 ) amt++; 256 (*func)(arg,bufpt,amt); 257 count += amt; 258 if( c==0 ) break; 259 } 260 if( (c=(*++fmt))==0 ){ 261 errorflag = 1; 262 (*func)(arg,"%",1); 263 count++; 264 break; 265 } 266 /* Find out what flags are present */ 267 flag_leftjustify = flag_plussign = flag_blanksign = 268 flag_alternateform = flag_altform2 = flag_zeropad = 0; 269 done = 0; 270 do{ 271 switch( c ){ 272 case '-': flag_leftjustify = 1; break; 273 case '+': flag_plussign = 1; break; 274 case ' ': flag_blanksign = 1; break; 275 case '#': flag_alternateform = 1; break; 276 case '!': flag_altform2 = 1; break; 277 case '0': flag_zeropad = 1; break; 278 default: done = 1; break; 279 } 280 }while( !done && (c=(*++fmt))!=0 ); 281 /* Get the field width */ 282 width = 0; 283 if( c=='*' ){ 284 width = va_arg(ap,int); 285 if( width<0 ){ 286 flag_leftjustify = 1; 287 width = -width; 288 } 289 c = *++fmt; 290 }else{ 291 while( c>='0' && c<='9' ){ 292 width = width*10 + c - '0'; 293 c = *++fmt; 294 } 295 } 296 if( width > etBUFSIZE-10 ){ 297 width = etBUFSIZE-10; 298 } 299 /* Get the precision */ 300 if( c=='.' ){ 301 precision = 0; 302 c = *++fmt; 303 if( c=='*' ){ 304 precision = va_arg(ap,int); 305 if( precision<0 ) precision = -precision; 306 c = *++fmt; 307 }else{ 308 while( c>='0' && c<='9' ){ 309 precision = precision*10 + c - '0'; 310 c = *++fmt; 311 } 312 } 313 }else{ 314 precision = -1; 315 } 316 /* Get the conversion type modifier */ 317 if( c=='l' ){ 318 flag_long = 1; 319 c = *++fmt; 320 if( c=='l' ){ 321 flag_longlong = 1; 322 c = *++fmt; 323 }else{ 324 flag_longlong = 0; 325 } 326 }else{ 327 flag_long = flag_longlong = 0; 328 } 329 /* Fetch the info entry for the field */ 330 infop = 0; 331 for(idx=0; idx<etNINFO; idx++){ 332 if( c==fmtinfo[idx].fmttype ){ 333 infop = &fmtinfo[idx]; 334 if( useExtended || (infop->flags & FLAG_INTERN)==0 ){ 335 xtype = infop->type; 336 }else{ 337 return -1; 338 } 339 break; 340 } 341 } 342 zExtra = 0; 343 if( infop==0 ){ 344 return -1; 345 } 346 347 348 /* Limit the precision to prevent overflowing buf[] during conversion */ 349 if( precision>etBUFSIZE-40 && (infop->flags & FLAG_STRING)==0 ){ 350 precision = etBUFSIZE-40; 351 } 352 353 /* 354 ** At this point, variables are initialized as follows: 355 ** 356 ** flag_alternateform TRUE if a '#' is present. 357 ** flag_altform2 TRUE if a '!' is present. 358 ** flag_plussign TRUE if a '+' is present. 359 ** flag_leftjustify TRUE if a '-' is present or if the 360 ** field width was negative. 361 ** flag_zeropad TRUE if the width began with 0. 362 ** flag_long TRUE if the letter 'l' (ell) prefixed 363 ** the conversion character. 364 ** flag_longlong TRUE if the letter 'll' (ell ell) prefixed 365 ** the conversion character. 366 ** flag_blanksign TRUE if a ' ' is present. 367 ** width The specified field width. This is 368 ** always non-negative. Zero is the default. 369 ** precision The specified precision. The default 370 ** is -1. 371 ** xtype The class of the conversion. 372 ** infop Pointer to the appropriate info struct. 373 */ 374 switch( xtype ){ 375 case etPOINTER: 376 flag_longlong = sizeof(char*)==sizeof(i64); 377 flag_long = sizeof(char*)==sizeof(long int); 378 /* Fall through into the next case */ 379 case etRADIX: 380 if( infop->flags & FLAG_SIGNED ){ 381 i64 v; 382 if( flag_longlong ) v = va_arg(ap,i64); 383 else if( flag_long ) v = va_arg(ap,long int); 384 else v = va_arg(ap,int); 385 if( v<0 ){ 386 longvalue = -v; 387 prefix = '-'; 388 }else{ 389 longvalue = v; 390 if( flag_plussign ) prefix = '+'; 391 else if( flag_blanksign ) prefix = ' '; 392 else prefix = 0; 393 } 394 }else{ 395 if( flag_longlong ) longvalue = va_arg(ap,u64); 396 else if( flag_long ) longvalue = va_arg(ap,unsigned long int); 397 else longvalue = va_arg(ap,unsigned int); 398 prefix = 0; 399 } 400 if( longvalue==0 ) flag_alternateform = 0; 401 if( flag_zeropad && precision<width-(prefix!=0) ){ 402 precision = width-(prefix!=0); 403 } 404 bufpt = &buf[etBUFSIZE-1]; 405 { 406 register const char *cset; /* Use registers for speed */ 407 register int base; 408 cset = &aDigits[infop->charset]; 409 base = infop->base; 410 do{ /* Convert to ascii */ 411 *(--bufpt) = cset[longvalue%base]; 412 longvalue = longvalue/base; 413 }while( longvalue>0 ); 414 } 415 length = &buf[etBUFSIZE-1]-bufpt; 416 for(idx=precision-length; idx>0; idx--){ 417 *(--bufpt) = '0'; /* Zero pad */ 418 } 419 if( prefix ) *(--bufpt) = prefix; /* Add sign */ 420 if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */ 421 const char *pre; 422 char x; 423 pre = &aPrefix[infop->prefix]; 424 if( *bufpt!=pre[0] ){ 425 for(; (x=(*pre))!=0; pre++) *(--bufpt) = x; 426 } 427 } 428 length = &buf[etBUFSIZE-1]-bufpt; 429 break; 430 case etFLOAT: 431 case etEXP: 432 case etGENERIC: 433 realvalue = va_arg(ap,double); 434 #ifndef SQLITE_OMIT_FLOATING_POINT 435 if( precision<0 ) precision = 6; /* Set default precision */ 436 if( precision>etBUFSIZE/2-10 ) precision = etBUFSIZE/2-10; 437 if( realvalue<0.0 ){ 438 realvalue = -realvalue; 439 prefix = '-'; 440 }else{ 441 if( flag_plussign ) prefix = '+'; 442 else if( flag_blanksign ) prefix = ' '; 443 else prefix = 0; 444 } 445 if( xtype==etGENERIC && precision>0 ) precision--; 446 #if 0 447 /* Rounding works like BSD when the constant 0.4999 is used. Wierd! */ 448 for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1); 449 #else 450 /* It makes more sense to use 0.5 */ 451 for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){} 452 #endif 453 if( xtype==etFLOAT ) realvalue += rounder; 454 /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */ 455 exp = 0; 456 if( realvalue>0.0 ){ 457 while( realvalue>=1e32 && exp<=350 ){ realvalue *= 1e-32; exp+=32; } 458 while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; } 459 while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; } 460 while( realvalue<1e-8 && exp>=-350 ){ realvalue *= 1e8; exp-=8; } 461 while( realvalue<1.0 && exp>=-350 ){ realvalue *= 10.0; exp--; } 462 if( exp>350 || exp<-350 ){ 463 bufpt = "NaN"; 464 length = 3; 465 break; 466 } 467 } 468 bufpt = buf; 469 /* 470 ** If the field type is etGENERIC, then convert to either etEXP 471 ** or etFLOAT, as appropriate. 472 */ 473 flag_exp = xtype==etEXP; 474 if( xtype!=etFLOAT ){ 475 realvalue += rounder; 476 if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; } 477 } 478 if( xtype==etGENERIC ){ 479 flag_rtz = !flag_alternateform; 480 if( exp<-4 || exp>precision ){ 481 xtype = etEXP; 482 }else{ 483 precision = precision - exp; 484 xtype = etFLOAT; 485 } 486 }else{ 487 flag_rtz = 0; 488 } 489 if( xtype==etEXP ){ 490 e2 = 0; 491 }else{ 492 e2 = exp; 493 } 494 nsd = 0; 495 flag_dp = (precision>0) | flag_alternateform | flag_altform2; 496 /* The sign in front of the number */ 497 if( prefix ){ 498 *(bufpt++) = prefix; 499 } 500 /* Digits prior to the decimal point */ 501 if( e2<0 ){ 502 *(bufpt++) = '0'; 503 }else{ 504 for(; e2>=0; e2--){ 505 *(bufpt++) = et_getdigit(&realvalue,&nsd); 506 } 507 } 508 /* The decimal point */ 509 if( flag_dp ){ 510 *(bufpt++) = '.'; 511 } 512 /* "0" digits after the decimal point but before the first 513 ** significant digit of the number */ 514 for(e2++; e2<0 && precision>0; precision--, e2++){ 515 *(bufpt++) = '0'; 516 } 517 /* Significant digits after the decimal point */ 518 while( (precision--)>0 ){ 519 *(bufpt++) = et_getdigit(&realvalue,&nsd); 520 } 521 /* Remove trailing zeros and the "." if no digits follow the "." */ 522 if( flag_rtz && flag_dp ){ 523 while( bufpt[-1]=='0' ) *(--bufpt) = 0; 524 assert( bufpt>buf ); 525 if( bufpt[-1]=='.' ){ 526 if( flag_altform2 ){ 527 *(bufpt++) = '0'; 528 }else{ 529 *(--bufpt) = 0; 530 } 531 } 532 } 533 /* Add the "eNNN" suffix */ 534 if( flag_exp || (xtype==etEXP && exp) ){ 535 *(bufpt++) = aDigits[infop->charset]; 536 if( exp<0 ){ 537 *(bufpt++) = '-'; exp = -exp; 538 }else{ 539 *(bufpt++) = '+'; 540 } 541 if( exp>=100 ){ 542 *(bufpt++) = (exp/100)+'0'; /* 100's digit */ 543 exp %= 100; 544 } 545 *(bufpt++) = exp/10+'0'; /* 10's digit */ 546 *(bufpt++) = exp%10+'0'; /* 1's digit */ 547 } 548 *bufpt = 0; 549 550 /* The converted number is in buf[] and zero terminated. Output it. 551 ** Note that the number is in the usual order, not reversed as with 552 ** integer conversions. */ 553 length = bufpt-buf; 554 bufpt = buf; 555 556 /* Special case: Add leading zeros if the flag_zeropad flag is 557 ** set and we are not left justified */ 558 if( flag_zeropad && !flag_leftjustify && length < width){ 559 int i; 560 int nPad = width - length; 561 for(i=width; i>=nPad; i--){ 562 bufpt[i] = bufpt[i-nPad]; 563 } 564 i = prefix!=0; 565 while( nPad-- ) bufpt[i++] = '0'; 566 length = width; 567 } 568 #endif 569 break; 570 case etSIZE: 571 *(va_arg(ap,int*)) = count; 572 length = width = 0; 573 break; 574 case etPERCENT: 575 buf[0] = '%'; 576 bufpt = buf; 577 length = 1; 578 break; 579 case etCHARLIT: 580 case etCHARX: 581 c = buf[0] = (xtype==etCHARX ? va_arg(ap,int) : *++fmt); 582 if( precision>=0 ){ 583 for(idx=1; idx<precision; idx++) buf[idx] = c; 584 length = precision; 585 }else{ 586 length =1; 587 } 588 bufpt = buf; 589 break; 590 case etSTRING: 591 case etDYNSTRING: 592 bufpt = va_arg(ap,char*); 593 if( bufpt==0 ){ 594 bufpt = ""; 595 }else if( xtype==etDYNSTRING ){ 596 zExtra = bufpt; 597 } 598 length = strlen(bufpt); 599 if( precision>=0 && precision<length ) length = precision; 600 break; 601 case etSQLESCAPE: 602 case etSQLESCAPE2: { 603 int i, j, n, ch, isnull; 604 int needQuote; 605 char *escarg = va_arg(ap,char*); 606 isnull = escarg==0; 607 if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)"); 608 for(i=n=0; (ch=escarg[i])!=0; i++){ 609 if( ch=='\'' ) n++; 610 } 611 needQuote = !isnull && xtype==etSQLESCAPE2; 612 n += i + 1 + needQuote*2; 613 if( n>etBUFSIZE ){ 614 bufpt = zExtra = sqliteMalloc( n ); 615 if( bufpt==0 ) return -1; 616 }else{ 617 bufpt = buf; 618 } 619 j = 0; 620 if( needQuote ) bufpt[j++] = '\''; 621 for(i=0; (ch=escarg[i])!=0; i++){ 622 bufpt[j++] = ch; 623 if( ch=='\'' ) bufpt[j++] = ch; 624 } 625 if( needQuote ) bufpt[j++] = '\''; 626 bufpt[j] = 0; 627 length = j; 628 /* The precision is ignored on %q and %Q */ 629 /* if( precision>=0 && precision<length ) length = precision; */ 630 break; 631 } 632 case etTOKEN: { 633 Token *pToken = va_arg(ap, Token*); 634 if( pToken && pToken->z ){ 635 (*func)(arg, (char*)pToken->z, pToken->n); 636 } 637 length = width = 0; 638 break; 639 } 640 case etSRCLIST: { 641 SrcList *pSrc = va_arg(ap, SrcList*); 642 int k = va_arg(ap, int); 643 struct SrcList_item *pItem = &pSrc->a[k]; 644 assert( k>=0 && k<pSrc->nSrc ); 645 if( pItem->zDatabase && pItem->zDatabase[0] ){ 646 (*func)(arg, pItem->zDatabase, strlen(pItem->zDatabase)); 647 (*func)(arg, ".", 1); 648 } 649 (*func)(arg, pItem->zName, strlen(pItem->zName)); 650 length = width = 0; 651 break; 652 } 653 }/* End switch over the format type */ 654 /* 655 ** The text of the conversion is pointed to by "bufpt" and is 656 ** "length" characters long. The field width is "width". Do 657 ** the output. 658 */ 659 if( !flag_leftjustify ){ 660 register int nspace; 661 nspace = width-length; 662 if( nspace>0 ){ 663 count += nspace; 664 while( nspace>=etSPACESIZE ){ 665 (*func)(arg,spaces,etSPACESIZE); 666 nspace -= etSPACESIZE; 667 } 668 if( nspace>0 ) (*func)(arg,spaces,nspace); 669 } 670 } 671 if( length>0 ){ 672 (*func)(arg,bufpt,length); 673 count += length; 674 } 675 if( flag_leftjustify ){ 676 register int nspace; 677 nspace = width-length; 678 if( nspace>0 ){ 679 count += nspace; 680 while( nspace>=etSPACESIZE ){ 681 (*func)(arg,spaces,etSPACESIZE); 682 nspace -= etSPACESIZE; 683 } 684 if( nspace>0 ) (*func)(arg,spaces,nspace); 685 } 686 } 687 if( zExtra ){ 688 sqliteFree(zExtra); 689 } 690 }/* End for loop over the format string */ 691 return errorflag ? -1 : count; 692 } /* End of function */ 693 694 695 /* This structure is used to store state information about the 696 ** write to memory that is currently in progress. 697 */ 698 struct sgMprintf { 699 char *zBase; /* A base allocation */ 700 char *zText; /* The string collected so far */ 701 int nChar; /* Length of the string so far */ 702 int nTotal; /* Output size if unconstrained */ 703 int nAlloc; /* Amount of space allocated in zText */ 704 void *(*xRealloc)(void*,int); /* Function used to realloc memory */ 705 }; 706 707 /* 708 ** This function implements the callback from vxprintf. 709 ** 710 ** This routine add nNewChar characters of text in zNewText to 711 ** the sgMprintf structure pointed to by "arg". 712 */ 713 static void mout(void *arg, const char *zNewText, int nNewChar){ 714 struct sgMprintf *pM = (struct sgMprintf*)arg; 715 pM->nTotal += nNewChar; 716 if( pM->nChar + nNewChar + 1 > pM->nAlloc ){ 717 if( pM->xRealloc==0 ){ 718 nNewChar = pM->nAlloc - pM->nChar - 1; 719 }else{ 720 pM->nAlloc = pM->nChar + nNewChar*2 + 1; 721 if( pM->zText==pM->zBase ){ 722 pM->zText = pM->xRealloc(0, pM->nAlloc); 723 if( pM->zText && pM->nChar ){ 724 memcpy(pM->zText, pM->zBase, pM->nChar); 725 } 726 }else{ 727 char *zNew; 728 zNew = pM->xRealloc(pM->zText, pM->nAlloc); 729 if( zNew ){ 730 pM->zText = zNew; 731 } 732 } 733 } 734 } 735 if( pM->zText ){ 736 if( nNewChar>0 ){ 737 memcpy(&pM->zText[pM->nChar], zNewText, nNewChar); 738 pM->nChar += nNewChar; 739 } 740 pM->zText[pM->nChar] = 0; 741 } 742 } 743 744 /* 745 ** This routine is a wrapper around xprintf() that invokes mout() as 746 ** the consumer. 747 */ 748 static char *base_vprintf( 749 void *(*xRealloc)(void*,int), /* Routine to realloc memory. May be NULL */ 750 int useInternal, /* Use internal %-conversions if true */ 751 char *zInitBuf, /* Initially write here, before mallocing */ 752 int nInitBuf, /* Size of zInitBuf[] */ 753 const char *zFormat, /* format string */ 754 va_list ap /* arguments */ 755 ){ 756 struct sgMprintf sM; 757 sM.zBase = sM.zText = zInitBuf; 758 sM.nChar = sM.nTotal = 0; 759 sM.nAlloc = nInitBuf; 760 sM.xRealloc = xRealloc; 761 vxprintf(mout, &sM, useInternal, zFormat, ap); 762 if( xRealloc ){ 763 if( sM.zText==sM.zBase ){ 764 sM.zText = xRealloc(0, sM.nChar+1); 765 if( sM.zText ){ 766 memcpy(sM.zText, sM.zBase, sM.nChar+1); 767 } 768 }else if( sM.nAlloc>sM.nChar+10 ){ 769 char *zNew = xRealloc(sM.zText, sM.nChar+1); 770 if( zNew ){ 771 sM.zText = zNew; 772 } 773 } 774 } 775 return sM.zText; 776 } 777 778 /* 779 ** Realloc that is a real function, not a macro. 780 */ 781 static void *printf_realloc(void *old, int size){ 782 return sqliteRealloc(old,size); 783 } 784 785 /* 786 ** Print into memory obtained from sqliteMalloc(). Use the internal 787 ** %-conversion extensions. 788 */ 789 char *sqlite3VMPrintf(const char *zFormat, va_list ap){ 790 char zBase[SQLITE_PRINT_BUF_SIZE]; 791 return base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap); 792 } 793 794 /* 795 ** Print into memory obtained from sqliteMalloc(). Use the internal 796 ** %-conversion extensions. 797 */ 798 char *sqlite3MPrintf(const char *zFormat, ...){ 799 va_list ap; 800 char *z; 801 char zBase[SQLITE_PRINT_BUF_SIZE]; 802 va_start(ap, zFormat); 803 z = base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap); 804 va_end(ap); 805 return z; 806 } 807 808 /* 809 ** Print into memory obtained from sqlite3_malloc(). Omit the internal 810 ** %-conversion extensions. 811 */ 812 char *sqlite3_vmprintf(const char *zFormat, va_list ap){ 813 char zBase[SQLITE_PRINT_BUF_SIZE]; 814 return base_vprintf(sqlite3_realloc, 0, zBase, sizeof(zBase), zFormat, ap); 815 } 816 817 /* 818 ** Print into memory obtained from sqlite3_malloc()(). Omit the internal 819 ** %-conversion extensions. 820 */ 821 char *sqlite3_mprintf(const char *zFormat, ...){ 822 va_list ap; 823 char *z; 824 char zBase[SQLITE_PRINT_BUF_SIZE]; 825 va_start(ap, zFormat); 826 z = base_vprintf(sqlite3_realloc, 0, zBase, sizeof(zBase), zFormat, ap); 827 va_end(ap); 828 return z; 829 } 830 831 /* 832 ** sqlite3_snprintf() works like snprintf() except that it ignores the 833 ** current locale settings. This is important for SQLite because we 834 ** are not able to use a "," as the decimal point in place of "." as 835 ** specified by some locales. 836 */ 837 char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){ 838 char *z; 839 va_list ap; 840 841 va_start(ap,zFormat); 842 z = base_vprintf(0, 0, zBuf, n, zFormat, ap); 843 va_end(ap); 844 return z; 845 } 846 847 #if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) 848 /* 849 ** A version of printf() that understands %lld. Used for debugging. 850 ** The printf() built into some versions of windows does not understand %lld 851 ** and segfaults if you give it a long long int. 852 */ 853 void sqlite3DebugPrintf(const char *zFormat, ...){ 854 extern int getpid(void); 855 va_list ap; 856 char zBuf[500]; 857 va_start(ap, zFormat); 858 base_vprintf(0, 0, zBuf, sizeof(zBuf), zFormat, ap); 859 va_end(ap); 860 fprintf(stdout,"%s", zBuf); 861 fflush(stdout); 862 } 863 #endif 864