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| 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 1 /* Integer types. %d, %x, %o, and so forth */ | |
| 19 #define etFLOAT 2 /* Floating point. %f */ | |
| 20 #define etEXP 3 /* Exponentional notation. %e and %E */ | |
| 21 #define etGENERIC 4 /* Floating or exponential, depending on exponent. %g */ | |
| 22 #define etSIZE 5 /* Return number of characters processed so far. %n */ | |
| 23 #define etSTRING 6 /* Strings. %s */ | |
| 24 #define etDYNSTRING 7 /* Dynamically allocated strings. %z */ | |
| 25 #define etPERCENT 8 /* Percent symbol. %% */ | |
| 26 #define etCHARX 9 /* Characters. %c */ | |
| 27 /* The rest are extensions, not normally found in printf() */ | |
| 28 #define etSQLESCAPE 10 /* Strings with '\'' doubled. %q */ | |
| 29 #define etSQLESCAPE2 11 /* Strings with '\'' doubled and enclosed in '', | |
| 30 NULL pointers replaced by SQL NULL. %Q */ | |
| 31 #define etTOKEN 12 /* a pointer to a Token structure */ | |
| 32 #define etSRCLIST 13 /* a pointer to a SrcList */ | |
| 33 #define etPOINTER 14 /* The %p conversion */ | |
| 34 #define etSQLESCAPE3 15 /* %w -> Strings with '\"' doubled */ | |
| 35 #define etORDINAL 16 /* %r -> 1st, 2nd, 3rd, 4th, etc. English only */ | |
| 36 | |
| 37 #define etINVALID 0 /* Any unrecognized conversion type */ | |
| 38 | |
| 39 | |
| 40 /* | |
| 41 ** An "etByte" is an 8-bit unsigned value. | |
| 42 */ | |
| 43 typedef unsigned char etByte; | |
| 44 | |
| 45 /* | |
| 46 ** Each builtin conversion character (ex: the 'd' in "%d") is described | |
| 47 ** by an instance of the following structure | |
| 48 */ | |
| 49 typedef struct et_info { /* Information about each format field */ | |
| 50 char fmttype; /* The format field code letter */ | |
| 51 etByte base; /* The base for radix conversion */ | |
| 52 etByte flags; /* One or more of FLAG_ constants below */ | |
| 53 etByte type; /* Conversion paradigm */ | |
| 54 etByte charset; /* Offset into aDigits[] of the digits string */ | |
| 55 etByte prefix; /* Offset into aPrefix[] of the prefix string */ | |
| 56 } et_info; | |
| 57 | |
| 58 /* | |
| 59 ** Allowed values for et_info.flags | |
| 60 */ | |
| 61 #define FLAG_SIGNED 1 /* True if the value to convert is signed */ | |
| 62 #define FLAG_INTERN 2 /* True if for internal use only */ | |
| 63 #define FLAG_STRING 4 /* Allow infinity 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, etRADIX, 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, etRADIX, 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, etRADIX, 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 have the FLAG_INTERN bit set and are thus for internal | |
| 97 ** use only */ | |
| 98 { 'T', 0, 2, etTOKEN, 0, 0 }, | |
| 99 { 'S', 0, 2, etSRCLIST, 0, 0 }, | |
| 100 { 'r', 10, 3, etORDINAL, 0, 0 }, | |
| 101 }; | |
| 102 | |
| 103 /* | |
| 104 ** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point | |
| 105 ** conversions will work. | |
| 106 */ | |
| 107 #ifndef SQLITE_OMIT_FLOATING_POINT | |
| 108 /* | |
| 109 ** "*val" is a double such that 0.1 <= *val < 10.0 | |
| 110 ** Return the ascii code for the leading digit of *val, then | |
| 111 ** multiply "*val" by 10.0 to renormalize. | |
| 112 ** | |
| 113 ** Example: | |
| 114 ** input: *val = 3.14159 | |
| 115 ** output: *val = 1.4159 function return = '3' | |
| 116 ** | |
| 117 ** The counter *cnt is incremented each time. After counter exceeds | |
| 118 ** 16 (the number of significant digits in a 64-bit float) '0' is | |
| 119 ** always returned. | |
| 120 */ | |
| 121 static char et_getdigit(LONGDOUBLE_TYPE *val, int *cnt){ | |
| 122 int digit; | |
| 123 LONGDOUBLE_TYPE d; | |
| 124 if( (*cnt)<=0 ) return '0'; | |
| 125 (*cnt)--; | |
| 126 digit = (int)*val; | |
| 127 d = digit; | |
| 128 digit += '0'; | |
| 129 *val = (*val - d)*10.0; | |
| 130 return (char)digit; | |
| 131 } | |
| 132 #endif /* SQLITE_OMIT_FLOATING_POINT */ | |
| 133 | |
| 134 /* | |
| 135 ** Set the StrAccum object to an error mode. | |
| 136 */ | |
| 137 static void setStrAccumError(StrAccum *p, u8 eError){ | |
| 138 assert( eError==STRACCUM_NOMEM || eError==STRACCUM_TOOBIG ); | |
| 139 p->accError = eError; | |
| 140 p->nAlloc = 0; | |
| 141 } | |
| 142 | |
| 143 /* | |
| 144 ** Extra argument values from a PrintfArguments object | |
| 145 */ | |
| 146 static sqlite3_int64 getIntArg(PrintfArguments *p){ | |
| 147 if( p->nArg<=p->nUsed ) return 0; | |
| 148 return sqlite3_value_int64(p->apArg[p->nUsed++]); | |
| 149 } | |
| 150 static double getDoubleArg(PrintfArguments *p){ | |
| 151 if( p->nArg<=p->nUsed ) return 0.0; | |
| 152 return sqlite3_value_double(p->apArg[p->nUsed++]); | |
| 153 } | |
| 154 static char *getTextArg(PrintfArguments *p){ | |
| 155 if( p->nArg<=p->nUsed ) return 0; | |
| 156 return (char*)sqlite3_value_text(p->apArg[p->nUsed++]); | |
| 157 } | |
| 158 | |
| 159 | |
| 160 /* | |
| 161 ** On machines with a small stack size, you can redefine the | |
| 162 ** SQLITE_PRINT_BUF_SIZE to be something smaller, if desired. | |
| 163 */ | |
| 164 #ifndef SQLITE_PRINT_BUF_SIZE | |
| 165 # define SQLITE_PRINT_BUF_SIZE 70 | |
| 166 #endif | |
| 167 #define etBUFSIZE SQLITE_PRINT_BUF_SIZE /* Size of the output buffer */ | |
| 168 | |
| 169 /* | |
| 170 ** Render a string given by "fmt" into the StrAccum object. | |
| 171 */ | |
| 172 void sqlite3VXPrintf( | |
| 173 StrAccum *pAccum, /* Accumulate results here */ | |
| 174 u32 bFlags, /* SQLITE_PRINTF_* flags */ | |
| 175 const char *fmt, /* Format string */ | |
| 176 va_list ap /* arguments */ | |
| 177 ){ | |
| 178 int c; /* Next character in the format string */ | |
| 179 char *bufpt; /* Pointer to the conversion buffer */ | |
| 180 int precision; /* Precision of the current field */ | |
| 181 int length; /* Length of the field */ | |
| 182 int idx; /* A general purpose loop counter */ | |
| 183 int width; /* Width of the current field */ | |
| 184 etByte flag_leftjustify; /* True if "-" flag is present */ | |
| 185 etByte flag_plussign; /* True if "+" flag is present */ | |
| 186 etByte flag_blanksign; /* True if " " flag is present */ | |
| 187 etByte flag_alternateform; /* True if "#" flag is present */ | |
| 188 etByte flag_altform2; /* True if "!" flag is present */ | |
| 189 etByte flag_zeropad; /* True if field width constant starts with zero */ | |
| 190 etByte flag_long; /* True if "l" flag is present */ | |
| 191 etByte flag_longlong; /* True if the "ll" flag is present */ | |
| 192 etByte done; /* Loop termination flag */ | |
| 193 etByte xtype = 0; /* Conversion paradigm */ | |
| 194 u8 bArgList; /* True for SQLITE_PRINTF_SQLFUNC */ | |
| 195 u8 useIntern; /* Ok to use internal conversions (ex: %T) */ | |
| 196 char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */ | |
| 197 sqlite_uint64 longvalue; /* Value for integer types */ | |
| 198 LONGDOUBLE_TYPE realvalue; /* Value for real types */ | |
| 199 const et_info *infop; /* Pointer to the appropriate info structure */ | |
| 200 char *zOut; /* Rendering buffer */ | |
| 201 int nOut; /* Size of the rendering buffer */ | |
| 202 char *zExtra = 0; /* Malloced memory used by some conversion */ | |
| 203 #ifndef SQLITE_OMIT_FLOATING_POINT | |
| 204 int exp, e2; /* exponent of real numbers */ | |
| 205 int nsd; /* Number of significant digits returned */ | |
| 206 double rounder; /* Used for rounding floating point values */ | |
| 207 etByte flag_dp; /* True if decimal point should be shown */ | |
| 208 etByte flag_rtz; /* True if trailing zeros should be removed */ | |
| 209 #endif | |
| 210 PrintfArguments *pArgList = 0; /* Arguments for SQLITE_PRINTF_SQLFUNC */ | |
| 211 char buf[etBUFSIZE]; /* Conversion buffer */ | |
| 212 | |
| 213 bufpt = 0; | |
| 214 if( bFlags ){ | |
| 215 if( (bArgList = (bFlags & SQLITE_PRINTF_SQLFUNC))!=0 ){ | |
| 216 pArgList = va_arg(ap, PrintfArguments*); | |
| 217 } | |
| 218 useIntern = bFlags & SQLITE_PRINTF_INTERNAL; | |
| 219 }else{ | |
| 220 bArgList = useIntern = 0; | |
| 221 } | |
| 222 for(; (c=(*fmt))!=0; ++fmt){ | |
| 223 if( c!='%' ){ | |
| 224 bufpt = (char *)fmt; | |
| 225 #if HAVE_STRCHRNUL | |
| 226 fmt = strchrnul(fmt, '%'); | |
| 227 #else | |
| 228 do{ fmt++; }while( *fmt && *fmt != '%' ); | |
| 229 #endif | |
| 230 sqlite3StrAccumAppend(pAccum, bufpt, (int)(fmt - bufpt)); | |
| 231 if( *fmt==0 ) break; | |
| 232 } | |
| 233 if( (c=(*++fmt))==0 ){ | |
| 234 sqlite3StrAccumAppend(pAccum, "%", 1); | |
| 235 break; | |
| 236 } | |
| 237 /* Find out what flags are present */ | |
| 238 flag_leftjustify = flag_plussign = flag_blanksign = | |
| 239 flag_alternateform = flag_altform2 = flag_zeropad = 0; | |
| 240 done = 0; | |
| 241 do{ | |
| 242 switch( c ){ | |
| 243 case '-': flag_leftjustify = 1; break; | |
| 244 case '+': flag_plussign = 1; break; | |
| 245 case ' ': flag_blanksign = 1; break; | |
| 246 case '#': flag_alternateform = 1; break; | |
| 247 case '!': flag_altform2 = 1; break; | |
| 248 case '0': flag_zeropad = 1; break; | |
| 249 default: done = 1; break; | |
| 250 } | |
| 251 }while( !done && (c=(*++fmt))!=0 ); | |
| 252 /* Get the field width */ | |
| 253 if( c=='*' ){ | |
| 254 if( bArgList ){ | |
| 255 width = (int)getIntArg(pArgList); | |
| 256 }else{ | |
| 257 width = va_arg(ap,int); | |
| 258 } | |
| 259 if( width<0 ){ | |
| 260 flag_leftjustify = 1; | |
| 261 width = width >= -2147483647 ? -width : 0; | |
| 262 } | |
| 263 c = *++fmt; | |
| 264 }else{ | |
| 265 unsigned wx = 0; | |
| 266 while( c>='0' && c<='9' ){ | |
| 267 wx = wx*10 + c - '0'; | |
| 268 c = *++fmt; | |
| 269 } | |
| 270 testcase( wx>0x7fffffff ); | |
| 271 width = wx & 0x7fffffff; | |
| 272 } | |
| 273 assert( width>=0 ); | |
| 274 #ifdef SQLITE_PRINTF_PRECISION_LIMIT | |
| 275 if( width>SQLITE_PRINTF_PRECISION_LIMIT ){ | |
| 276 width = SQLITE_PRINTF_PRECISION_LIMIT; | |
| 277 } | |
| 278 #endif | |
| 279 | |
| 280 /* Get the precision */ | |
| 281 if( c=='.' ){ | |
| 282 c = *++fmt; | |
| 283 if( c=='*' ){ | |
| 284 if( bArgList ){ | |
| 285 precision = (int)getIntArg(pArgList); | |
| 286 }else{ | |
| 287 precision = va_arg(ap,int); | |
| 288 } | |
| 289 c = *++fmt; | |
| 290 if( precision<0 ){ | |
| 291 precision = precision >= -2147483647 ? -precision : -1; | |
| 292 } | |
| 293 }else{ | |
| 294 unsigned px = 0; | |
| 295 while( c>='0' && c<='9' ){ | |
| 296 px = px*10 + c - '0'; | |
| 297 c = *++fmt; | |
| 298 } | |
| 299 testcase( px>0x7fffffff ); | |
| 300 precision = px & 0x7fffffff; | |
| 301 } | |
| 302 }else{ | |
| 303 precision = -1; | |
| 304 } | |
| 305 assert( precision>=(-1) ); | |
| 306 #ifdef SQLITE_PRINTF_PRECISION_LIMIT | |
| 307 if( precision>SQLITE_PRINTF_PRECISION_LIMIT ){ | |
| 308 precision = SQLITE_PRINTF_PRECISION_LIMIT; | |
| 309 } | |
| 310 #endif | |
| 311 | |
| 312 | |
| 313 /* Get the conversion type modifier */ | |
| 314 if( c=='l' ){ | |
| 315 flag_long = 1; | |
| 316 c = *++fmt; | |
| 317 if( c=='l' ){ | |
| 318 flag_longlong = 1; | |
| 319 c = *++fmt; | |
| 320 }else{ | |
| 321 flag_longlong = 0; | |
| 322 } | |
| 323 }else{ | |
| 324 flag_long = flag_longlong = 0; | |
| 325 } | |
| 326 /* Fetch the info entry for the field */ | |
| 327 infop = &fmtinfo[0]; | |
| 328 xtype = etINVALID; | |
| 329 for(idx=0; idx<ArraySize(fmtinfo); idx++){ | |
| 330 if( c==fmtinfo[idx].fmttype ){ | |
| 331 infop = &fmtinfo[idx]; | |
| 332 if( useIntern || (infop->flags & FLAG_INTERN)==0 ){ | |
| 333 xtype = infop->type; | |
| 334 }else{ | |
| 335 return; | |
| 336 } | |
| 337 break; | |
| 338 } | |
| 339 } | |
| 340 | |
| 341 /* | |
| 342 ** At this point, variables are initialized as follows: | |
| 343 ** | |
| 344 ** flag_alternateform TRUE if a '#' is present. | |
| 345 ** flag_altform2 TRUE if a '!' is present. | |
| 346 ** flag_plussign TRUE if a '+' is present. | |
| 347 ** flag_leftjustify TRUE if a '-' is present or if the | |
| 348 ** field width was negative. | |
| 349 ** flag_zeropad TRUE if the width began with 0. | |
| 350 ** flag_long TRUE if the letter 'l' (ell) prefixed | |
| 351 ** the conversion character. | |
| 352 ** flag_longlong TRUE if the letter 'll' (ell ell) prefixed | |
| 353 ** the conversion character. | |
| 354 ** flag_blanksign TRUE if a ' ' is present. | |
| 355 ** width The specified field width. This is | |
| 356 ** always non-negative. Zero is the default. | |
| 357 ** precision The specified precision. The default | |
| 358 ** is -1. | |
| 359 ** xtype The class of the conversion. | |
| 360 ** infop Pointer to the appropriate info struct. | |
| 361 */ | |
| 362 switch( xtype ){ | |
| 363 case etPOINTER: | |
| 364 flag_longlong = sizeof(char*)==sizeof(i64); | |
| 365 flag_long = sizeof(char*)==sizeof(long int); | |
| 366 /* Fall through into the next case */ | |
| 367 case etORDINAL: | |
| 368 case etRADIX: | |
| 369 if( infop->flags & FLAG_SIGNED ){ | |
| 370 i64 v; | |
| 371 if( bArgList ){ | |
| 372 v = getIntArg(pArgList); | |
| 373 }else if( flag_longlong ){ | |
| 374 v = va_arg(ap,i64); | |
| 375 }else if( flag_long ){ | |
| 376 v = va_arg(ap,long int); | |
| 377 }else{ | |
| 378 v = va_arg(ap,int); | |
| 379 } | |
| 380 if( v<0 ){ | |
| 381 if( v==SMALLEST_INT64 ){ | |
| 382 longvalue = ((u64)1)<<63; | |
| 383 }else{ | |
| 384 longvalue = -v; | |
| 385 } | |
| 386 prefix = '-'; | |
| 387 }else{ | |
| 388 longvalue = v; | |
| 389 if( flag_plussign ) prefix = '+'; | |
| 390 else if( flag_blanksign ) prefix = ' '; | |
| 391 else prefix = 0; | |
| 392 } | |
| 393 }else{ | |
| 394 if( bArgList ){ | |
| 395 longvalue = (u64)getIntArg(pArgList); | |
| 396 }else if( flag_longlong ){ | |
| 397 longvalue = va_arg(ap,u64); | |
| 398 }else if( flag_long ){ | |
| 399 longvalue = va_arg(ap,unsigned long int); | |
| 400 }else{ | |
| 401 longvalue = va_arg(ap,unsigned int); | |
| 402 } | |
| 403 prefix = 0; | |
| 404 } | |
| 405 if( longvalue==0 ) flag_alternateform = 0; | |
| 406 if( flag_zeropad && precision<width-(prefix!=0) ){ | |
| 407 precision = width-(prefix!=0); | |
| 408 } | |
| 409 if( precision<etBUFSIZE-10 ){ | |
| 410 nOut = etBUFSIZE; | |
| 411 zOut = buf; | |
| 412 }else{ | |
| 413 nOut = precision + 10; | |
| 414 zOut = zExtra = sqlite3Malloc( nOut ); | |
| 415 if( zOut==0 ){ | |
| 416 setStrAccumError(pAccum, STRACCUM_NOMEM); | |
| 417 return; | |
| 418 } | |
| 419 } | |
| 420 bufpt = &zOut[nOut-1]; | |
| 421 if( xtype==etORDINAL ){ | |
| 422 static const char zOrd[] = "thstndrd"; | |
| 423 int x = (int)(longvalue % 10); | |
| 424 if( x>=4 || (longvalue/10)%10==1 ){ | |
| 425 x = 0; | |
| 426 } | |
| 427 *(--bufpt) = zOrd[x*2+1]; | |
| 428 *(--bufpt) = zOrd[x*2]; | |
| 429 } | |
| 430 { | |
| 431 const char *cset = &aDigits[infop->charset]; | |
| 432 u8 base = infop->base; | |
| 433 do{ /* Convert to ascii */ | |
| 434 *(--bufpt) = cset[longvalue%base]; | |
| 435 longvalue = longvalue/base; | |
| 436 }while( longvalue>0 ); | |
| 437 } | |
| 438 length = (int)(&zOut[nOut-1]-bufpt); | |
| 439 for(idx=precision-length; idx>0; idx--){ | |
| 440 *(--bufpt) = '0'; /* Zero pad */ | |
| 441 } | |
| 442 if( prefix ) *(--bufpt) = prefix; /* Add sign */ | |
| 443 if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */ | |
| 444 const char *pre; | |
| 445 char x; | |
| 446 pre = &aPrefix[infop->prefix]; | |
| 447 for(; (x=(*pre))!=0; pre++) *(--bufpt) = x; | |
| 448 } | |
| 449 length = (int)(&zOut[nOut-1]-bufpt); | |
| 450 break; | |
| 451 case etFLOAT: | |
| 452 case etEXP: | |
| 453 case etGENERIC: | |
| 454 if( bArgList ){ | |
| 455 realvalue = getDoubleArg(pArgList); | |
| 456 }else{ | |
| 457 realvalue = va_arg(ap,double); | |
| 458 } | |
| 459 #ifdef SQLITE_OMIT_FLOATING_POINT | |
| 460 length = 0; | |
| 461 #else | |
| 462 if( precision<0 ) precision = 6; /* Set default precision */ | |
| 463 if( realvalue<0.0 ){ | |
| 464 realvalue = -realvalue; | |
| 465 prefix = '-'; | |
| 466 }else{ | |
| 467 if( flag_plussign ) prefix = '+'; | |
| 468 else if( flag_blanksign ) prefix = ' '; | |
| 469 else prefix = 0; | |
| 470 } | |
| 471 if( xtype==etGENERIC && precision>0 ) precision--; | |
| 472 testcase( precision>0xfff ); | |
| 473 for(idx=precision&0xfff, rounder=0.5; idx>0; idx--, rounder*=0.1){} | |
| 474 if( xtype==etFLOAT ) realvalue += rounder; | |
| 475 /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */ | |
| 476 exp = 0; | |
| 477 if( sqlite3IsNaN((double)realvalue) ){ | |
| 478 bufpt = "NaN"; | |
| 479 length = 3; | |
| 480 break; | |
| 481 } | |
| 482 if( realvalue>0.0 ){ | |
| 483 LONGDOUBLE_TYPE scale = 1.0; | |
| 484 while( realvalue>=1e100*scale && exp<=350 ){ scale *= 1e100;exp+=100;} | |
| 485 while( realvalue>=1e10*scale && exp<=350 ){ scale *= 1e10; exp+=10; } | |
| 486 while( realvalue>=10.0*scale && exp<=350 ){ scale *= 10.0; exp++; } | |
| 487 realvalue /= scale; | |
| 488 while( realvalue<1e-8 ){ realvalue *= 1e8; exp-=8; } | |
| 489 while( realvalue<1.0 ){ realvalue *= 10.0; exp--; } | |
| 490 if( exp>350 ){ | |
| 491 bufpt = buf; | |
| 492 buf[0] = prefix; | |
| 493 memcpy(buf+(prefix!=0),"Inf",4); | |
| 494 length = 3+(prefix!=0); | |
| 495 break; | |
| 496 } | |
| 497 } | |
| 498 bufpt = buf; | |
| 499 /* | |
| 500 ** If the field type is etGENERIC, then convert to either etEXP | |
| 501 ** or etFLOAT, as appropriate. | |
| 502 */ | |
| 503 if( xtype!=etFLOAT ){ | |
| 504 realvalue += rounder; | |
| 505 if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; } | |
| 506 } | |
| 507 if( xtype==etGENERIC ){ | |
| 508 flag_rtz = !flag_alternateform; | |
| 509 if( exp<-4 || exp>precision ){ | |
| 510 xtype = etEXP; | |
| 511 }else{ | |
| 512 precision = precision - exp; | |
| 513 xtype = etFLOAT; | |
| 514 } | |
| 515 }else{ | |
| 516 flag_rtz = flag_altform2; | |
| 517 } | |
| 518 if( xtype==etEXP ){ | |
| 519 e2 = 0; | |
| 520 }else{ | |
| 521 e2 = exp; | |
| 522 } | |
| 523 if( MAX(e2,0)+(i64)precision+(i64)width > etBUFSIZE - 15 ){ | |
| 524 bufpt = zExtra | |
| 525 = sqlite3Malloc( MAX(e2,0)+(i64)precision+(i64)width+15 ); | |
| 526 if( bufpt==0 ){ | |
| 527 setStrAccumError(pAccum, STRACCUM_NOMEM); | |
| 528 return; | |
| 529 } | |
| 530 } | |
| 531 zOut = bufpt; | |
| 532 nsd = 16 + flag_altform2*10; | |
| 533 flag_dp = (precision>0 ?1:0) | flag_alternateform | flag_altform2; | |
| 534 /* The sign in front of the number */ | |
| 535 if( prefix ){ | |
| 536 *(bufpt++) = prefix; | |
| 537 } | |
| 538 /* Digits prior to the decimal point */ | |
| 539 if( e2<0 ){ | |
| 540 *(bufpt++) = '0'; | |
| 541 }else{ | |
| 542 for(; e2>=0; e2--){ | |
| 543 *(bufpt++) = et_getdigit(&realvalue,&nsd); | |
| 544 } | |
| 545 } | |
| 546 /* The decimal point */ | |
| 547 if( flag_dp ){ | |
| 548 *(bufpt++) = '.'; | |
| 549 } | |
| 550 /* "0" digits after the decimal point but before the first | |
| 551 ** significant digit of the number */ | |
| 552 for(e2++; e2<0; precision--, e2++){ | |
| 553 assert( precision>0 ); | |
| 554 *(bufpt++) = '0'; | |
| 555 } | |
| 556 /* Significant digits after the decimal point */ | |
| 557 while( (precision--)>0 ){ | |
| 558 *(bufpt++) = et_getdigit(&realvalue,&nsd); | |
| 559 } | |
| 560 /* Remove trailing zeros and the "." if no digits follow the "." */ | |
| 561 if( flag_rtz && flag_dp ){ | |
| 562 while( bufpt[-1]=='0' ) *(--bufpt) = 0; | |
| 563 assert( bufpt>zOut ); | |
| 564 if( bufpt[-1]=='.' ){ | |
| 565 if( flag_altform2 ){ | |
| 566 *(bufpt++) = '0'; | |
| 567 }else{ | |
| 568 *(--bufpt) = 0; | |
| 569 } | |
| 570 } | |
| 571 } | |
| 572 /* Add the "eNNN" suffix */ | |
| 573 if( xtype==etEXP ){ | |
| 574 *(bufpt++) = aDigits[infop->charset]; | |
| 575 if( exp<0 ){ | |
| 576 *(bufpt++) = '-'; exp = -exp; | |
| 577 }else{ | |
| 578 *(bufpt++) = '+'; | |
| 579 } | |
| 580 if( exp>=100 ){ | |
| 581 *(bufpt++) = (char)((exp/100)+'0'); /* 100's digit */ | |
| 582 exp %= 100; | |
| 583 } | |
| 584 *(bufpt++) = (char)(exp/10+'0'); /* 10's digit */ | |
| 585 *(bufpt++) = (char)(exp%10+'0'); /* 1's digit */ | |
| 586 } | |
| 587 *bufpt = 0; | |
| 588 | |
| 589 /* The converted number is in buf[] and zero terminated. Output it. | |
| 590 ** Note that the number is in the usual order, not reversed as with | |
| 591 ** integer conversions. */ | |
| 592 length = (int)(bufpt-zOut); | |
| 593 bufpt = zOut; | |
| 594 | |
| 595 /* Special case: Add leading zeros if the flag_zeropad flag is | |
| 596 ** set and we are not left justified */ | |
| 597 if( flag_zeropad && !flag_leftjustify && length < width){ | |
| 598 int i; | |
| 599 int nPad = width - length; | |
| 600 for(i=width; i>=nPad; i--){ | |
| 601 bufpt[i] = bufpt[i-nPad]; | |
| 602 } | |
| 603 i = prefix!=0; | |
| 604 while( nPad-- ) bufpt[i++] = '0'; | |
| 605 length = width; | |
| 606 } | |
| 607 #endif /* !defined(SQLITE_OMIT_FLOATING_POINT) */ | |
| 608 break; | |
| 609 case etSIZE: | |
| 610 if( !bArgList ){ | |
| 611 *(va_arg(ap,int*)) = pAccum->nChar; | |
| 612 } | |
| 613 length = width = 0; | |
| 614 break; | |
| 615 case etPERCENT: | |
| 616 buf[0] = '%'; | |
| 617 bufpt = buf; | |
| 618 length = 1; | |
| 619 break; | |
| 620 case etCHARX: | |
| 621 if( bArgList ){ | |
| 622 bufpt = getTextArg(pArgList); | |
| 623 c = bufpt ? bufpt[0] : 0; | |
| 624 }else{ | |
| 625 c = va_arg(ap,int); | |
| 626 } | |
| 627 if( precision>1 ){ | |
| 628 width -= precision-1; | |
| 629 if( width>1 && !flag_leftjustify ){ | |
| 630 sqlite3AppendChar(pAccum, width-1, ' '); | |
| 631 width = 0; | |
| 632 } | |
| 633 sqlite3AppendChar(pAccum, precision-1, c); | |
| 634 } | |
| 635 length = 1; | |
| 636 buf[0] = c; | |
| 637 bufpt = buf; | |
| 638 break; | |
| 639 case etSTRING: | |
| 640 case etDYNSTRING: | |
| 641 if( bArgList ){ | |
| 642 bufpt = getTextArg(pArgList); | |
| 643 xtype = etSTRING; | |
| 644 }else{ | |
| 645 bufpt = va_arg(ap,char*); | |
| 646 } | |
| 647 if( bufpt==0 ){ | |
| 648 bufpt = ""; | |
| 649 }else if( xtype==etDYNSTRING ){ | |
| 650 zExtra = bufpt; | |
| 651 } | |
| 652 if( precision>=0 ){ | |
| 653 for(length=0; length<precision && bufpt[length]; length++){} | |
| 654 }else{ | |
| 655 length = sqlite3Strlen30(bufpt); | |
| 656 } | |
| 657 break; | |
| 658 case etSQLESCAPE: /* Escape ' characters */ | |
| 659 case etSQLESCAPE2: /* Escape ' and enclose in '...' */ | |
| 660 case etSQLESCAPE3: { /* Escape " characters */ | |
| 661 int i, j, k, n, isnull; | |
| 662 int needQuote; | |
| 663 char ch; | |
| 664 char q = ((xtype==etSQLESCAPE3)?'"':'\''); /* Quote character */ | |
| 665 char *escarg; | |
| 666 | |
| 667 if( bArgList ){ | |
| 668 escarg = getTextArg(pArgList); | |
| 669 }else{ | |
| 670 escarg = va_arg(ap,char*); | |
| 671 } | |
| 672 isnull = escarg==0; | |
| 673 if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)"); | |
| 674 k = precision; | |
| 675 for(i=n=0; k!=0 && (ch=escarg[i])!=0; i++, k--){ | |
| 676 if( ch==q ) n++; | |
| 677 } | |
| 678 needQuote = !isnull && xtype==etSQLESCAPE2; | |
| 679 n += i + 3; | |
| 680 if( n>etBUFSIZE ){ | |
| 681 bufpt = zExtra = sqlite3Malloc( n ); | |
| 682 if( bufpt==0 ){ | |
| 683 setStrAccumError(pAccum, STRACCUM_NOMEM); | |
| 684 return; | |
| 685 } | |
| 686 }else{ | |
| 687 bufpt = buf; | |
| 688 } | |
| 689 j = 0; | |
| 690 if( needQuote ) bufpt[j++] = q; | |
| 691 k = i; | |
| 692 for(i=0; i<k; i++){ | |
| 693 bufpt[j++] = ch = escarg[i]; | |
| 694 if( ch==q ) bufpt[j++] = ch; | |
| 695 } | |
| 696 if( needQuote ) bufpt[j++] = q; | |
| 697 bufpt[j] = 0; | |
| 698 length = j; | |
| 699 /* The precision in %q and %Q means how many input characters to | |
| 700 ** consume, not the length of the output... | |
| 701 ** if( precision>=0 && precision<length ) length = precision; */ | |
| 702 break; | |
| 703 } | |
| 704 case etTOKEN: { | |
| 705 Token *pToken = va_arg(ap, Token*); | |
| 706 assert( bArgList==0 ); | |
| 707 if( pToken && pToken->n ){ | |
| 708 sqlite3StrAccumAppend(pAccum, (const char*)pToken->z, pToken->n); | |
| 709 } | |
| 710 length = width = 0; | |
| 711 break; | |
| 712 } | |
| 713 case etSRCLIST: { | |
| 714 SrcList *pSrc = va_arg(ap, SrcList*); | |
| 715 int k = va_arg(ap, int); | |
| 716 struct SrcList_item *pItem = &pSrc->a[k]; | |
| 717 assert( bArgList==0 ); | |
| 718 assert( k>=0 && k<pSrc->nSrc ); | |
| 719 if( pItem->zDatabase ){ | |
| 720 sqlite3StrAccumAppendAll(pAccum, pItem->zDatabase); | |
| 721 sqlite3StrAccumAppend(pAccum, ".", 1); | |
| 722 } | |
| 723 sqlite3StrAccumAppendAll(pAccum, pItem->zName); | |
| 724 length = width = 0; | |
| 725 break; | |
| 726 } | |
| 727 default: { | |
| 728 assert( xtype==etINVALID ); | |
| 729 return; | |
| 730 } | |
| 731 }/* End switch over the format type */ | |
| 732 /* | |
| 733 ** The text of the conversion is pointed to by "bufpt" and is | |
| 734 ** "length" characters long. The field width is "width". Do | |
| 735 ** the output. | |
| 736 */ | |
| 737 width -= length; | |
| 738 if( width>0 && !flag_leftjustify ) sqlite3AppendChar(pAccum, width, ' '); | |
| 739 sqlite3StrAccumAppend(pAccum, bufpt, length); | |
| 740 if( width>0 && flag_leftjustify ) sqlite3AppendChar(pAccum, width, ' '); | |
| 741 | |
| 742 if( zExtra ){ | |
| 743 sqlite3DbFree(pAccum->db, zExtra); | |
| 744 zExtra = 0; | |
| 745 } | |
| 746 }/* End for loop over the format string */ | |
| 747 } /* End of function */ | |
| 748 | |
| 749 /* | |
| 750 ** Enlarge the memory allocation on a StrAccum object so that it is | |
| 751 ** able to accept at least N more bytes of text. | |
| 752 ** | |
| 753 ** Return the number of bytes of text that StrAccum is able to accept | |
| 754 ** after the attempted enlargement. The value returned might be zero. | |
| 755 */ | |
| 756 static int sqlite3StrAccumEnlarge(StrAccum *p, int N){ | |
| 757 char *zNew; | |
| 758 assert( p->nChar+(i64)N >= p->nAlloc ); /* Only called if really needed */ | |
| 759 if( p->accError ){ | |
| 760 testcase(p->accError==STRACCUM_TOOBIG); | |
| 761 testcase(p->accError==STRACCUM_NOMEM); | |
| 762 return 0; | |
| 763 } | |
| 764 if( p->mxAlloc==0 ){ | |
| 765 N = p->nAlloc - p->nChar - 1; | |
| 766 setStrAccumError(p, STRACCUM_TOOBIG); | |
| 767 return N; | |
| 768 }else{ | |
| 769 char *zOld = p->bMalloced ? p->zText : 0; | |
| 770 i64 szNew = p->nChar; | |
| 771 assert( (p->zText==0 || p->zText==p->zBase)==(p->bMalloced==0) ); | |
| 772 szNew += N + 1; | |
| 773 if( szNew+p->nChar<=p->mxAlloc ){ | |
| 774 /* Force exponential buffer size growth as long as it does not overflow, | |
| 775 ** to avoid having to call this routine too often */ | |
| 776 szNew += p->nChar; | |
| 777 } | |
| 778 if( szNew > p->mxAlloc ){ | |
| 779 sqlite3StrAccumReset(p); | |
| 780 setStrAccumError(p, STRACCUM_TOOBIG); | |
| 781 return 0; | |
| 782 }else{ | |
| 783 p->nAlloc = (int)szNew; | |
| 784 } | |
| 785 if( p->db ){ | |
| 786 zNew = sqlite3DbRealloc(p->db, zOld, p->nAlloc); | |
| 787 }else{ | |
| 788 zNew = sqlite3_realloc64(zOld, p->nAlloc); | |
| 789 } | |
| 790 if( zNew ){ | |
| 791 assert( p->zText!=0 || p->nChar==0 ); | |
| 792 if( !p->bMalloced && p->nChar>0 ) memcpy(zNew, p->zText, p->nChar); | |
| 793 p->zText = zNew; | |
| 794 p->nAlloc = sqlite3DbMallocSize(p->db, zNew); | |
| 795 p->bMalloced = 1; | |
| 796 }else{ | |
| 797 sqlite3StrAccumReset(p); | |
| 798 setStrAccumError(p, STRACCUM_NOMEM); | |
| 799 return 0; | |
| 800 } | |
| 801 } | |
| 802 return N; | |
| 803 } | |
| 804 | |
| 805 /* | |
| 806 ** Append N copies of character c to the given string buffer. | |
| 807 */ | |
| 808 void sqlite3AppendChar(StrAccum *p, int N, char c){ | |
| 809 testcase( p->nChar + (i64)N > 0x7fffffff ); | |
| 810 if( p->nChar+(i64)N >= p->nAlloc && (N = sqlite3StrAccumEnlarge(p, N))<=0 ){ | |
| 811 return; | |
| 812 } | |
| 813 assert( (p->zText==p->zBase)==(p->bMalloced==0) ); | |
| 814 while( (N--)>0 ) p->zText[p->nChar++] = c; | |
| 815 } | |
| 816 | |
| 817 /* | |
| 818 ** The StrAccum "p" is not large enough to accept N new bytes of z[]. | |
| 819 ** So enlarge if first, then do the append. | |
| 820 ** | |
| 821 ** This is a helper routine to sqlite3StrAccumAppend() that does special-case | |
| 822 ** work (enlarging the buffer) using tail recursion, so that the | |
| 823 ** sqlite3StrAccumAppend() routine can use fast calling semantics. | |
| 824 */ | |
| 825 static void SQLITE_NOINLINE enlargeAndAppend(StrAccum *p, const char *z, int N){ | |
| 826 N = sqlite3StrAccumEnlarge(p, N); | |
| 827 if( N>0 ){ | |
| 828 memcpy(&p->zText[p->nChar], z, N); | |
| 829 p->nChar += N; | |
| 830 } | |
| 831 assert( (p->zText==0 || p->zText==p->zBase)==(p->bMalloced==0) ); | |
| 832 } | |
| 833 | |
| 834 /* | |
| 835 ** Append N bytes of text from z to the StrAccum object. Increase the | |
| 836 ** size of the memory allocation for StrAccum if necessary. | |
| 837 */ | |
| 838 void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){ | |
| 839 assert( z!=0 || N==0 ); | |
| 840 assert( p->zText!=0 || p->nChar==0 || p->accError ); | |
| 841 assert( N>=0 ); | |
| 842 assert( p->accError==0 || p->nAlloc==0 ); | |
| 843 if( p->nChar+N >= p->nAlloc ){ | |
| 844 enlargeAndAppend(p,z,N); | |
| 845 }else{ | |
| 846 assert( p->zText ); | |
| 847 p->nChar += N; | |
| 848 memcpy(&p->zText[p->nChar-N], z, N); | |
| 849 } | |
| 850 } | |
| 851 | |
| 852 /* | |
| 853 ** Append the complete text of zero-terminated string z[] to the p string. | |
| 854 */ | |
| 855 void sqlite3StrAccumAppendAll(StrAccum *p, const char *z){ | |
| 856 sqlite3StrAccumAppend(p, z, sqlite3Strlen30(z)); | |
| 857 } | |
| 858 | |
| 859 | |
| 860 /* | |
| 861 ** Finish off a string by making sure it is zero-terminated. | |
| 862 ** Return a pointer to the resulting string. Return a NULL | |
| 863 ** pointer if any kind of error was encountered. | |
| 864 */ | |
| 865 char *sqlite3StrAccumFinish(StrAccum *p){ | |
| 866 if( p->zText ){ | |
| 867 assert( (p->zText==p->zBase)==(p->bMalloced==0) ); | |
| 868 p->zText[p->nChar] = 0; | |
| 869 if( p->mxAlloc>0 && p->bMalloced==0 ){ | |
| 870 p->zText = sqlite3DbMallocRaw(p->db, p->nChar+1 ); | |
| 871 if( p->zText ){ | |
| 872 memcpy(p->zText, p->zBase, p->nChar+1); | |
| 873 p->bMalloced = 1; | |
| 874 }else{ | |
| 875 setStrAccumError(p, STRACCUM_NOMEM); | |
| 876 } | |
| 877 } | |
| 878 } | |
| 879 return p->zText; | |
| 880 } | |
| 881 | |
| 882 /* | |
| 883 ** Reset an StrAccum string. Reclaim all malloced memory. | |
| 884 */ | |
| 885 void sqlite3StrAccumReset(StrAccum *p){ | |
| 886 assert( (p->zText==0 || p->zText==p->zBase)==(p->bMalloced==0) ); | |
| 887 if( p->bMalloced ){ | |
| 888 sqlite3DbFree(p->db, p->zText); | |
| 889 p->bMalloced = 0; | |
| 890 } | |
| 891 p->zText = 0; | |
| 892 } | |
| 893 | |
| 894 /* | |
| 895 ** Initialize a string accumulator. | |
| 896 ** | |
| 897 ** p: The accumulator to be initialized. | |
| 898 ** db: Pointer to a database connection. May be NULL. Lookaside | |
| 899 ** memory is used if not NULL. db->mallocFailed is set appropriately | |
| 900 ** when not NULL. | |
| 901 ** zBase: An initial buffer. May be NULL in which case the initial buffer | |
| 902 ** is malloced. | |
| 903 ** n: Size of zBase in bytes. If total space requirements never exceed | |
| 904 ** n then no memory allocations ever occur. | |
| 905 ** mx: Maximum number of bytes to accumulate. If mx==0 then no memory | |
| 906 ** allocations will ever occur. | |
| 907 */ | |
| 908 void sqlite3StrAccumInit(StrAccum *p, sqlite3 *db, char *zBase, int n, int mx){ | |
| 909 p->zText = p->zBase = zBase; | |
| 910 p->db = db; | |
| 911 p->nChar = 0; | |
| 912 p->nAlloc = n; | |
| 913 p->mxAlloc = mx; | |
| 914 p->accError = 0; | |
| 915 p->bMalloced = 0; | |
| 916 } | |
| 917 | |
| 918 /* | |
| 919 ** Print into memory obtained from sqliteMalloc(). Use the internal | |
| 920 ** %-conversion extensions. | |
| 921 */ | |
| 922 char *sqlite3VMPrintf(sqlite3 *db, const char *zFormat, va_list ap){ | |
| 923 char *z; | |
| 924 char zBase[SQLITE_PRINT_BUF_SIZE]; | |
| 925 StrAccum acc; | |
| 926 assert( db!=0 ); | |
| 927 sqlite3StrAccumInit(&acc, db, zBase, sizeof(zBase), | |
| 928 db->aLimit[SQLITE_LIMIT_LENGTH]); | |
| 929 sqlite3VXPrintf(&acc, SQLITE_PRINTF_INTERNAL, zFormat, ap); | |
| 930 z = sqlite3StrAccumFinish(&acc); | |
| 931 if( acc.accError==STRACCUM_NOMEM ){ | |
| 932 db->mallocFailed = 1; | |
| 933 } | |
| 934 return z; | |
| 935 } | |
| 936 | |
| 937 /* | |
| 938 ** Print into memory obtained from sqliteMalloc(). Use the internal | |
| 939 ** %-conversion extensions. | |
| 940 */ | |
| 941 char *sqlite3MPrintf(sqlite3 *db, const char *zFormat, ...){ | |
| 942 va_list ap; | |
| 943 char *z; | |
| 944 va_start(ap, zFormat); | |
| 945 z = sqlite3VMPrintf(db, zFormat, ap); | |
| 946 va_end(ap); | |
| 947 return z; | |
| 948 } | |
| 949 | |
| 950 /* | |
| 951 ** Print into memory obtained from sqlite3_malloc(). Omit the internal | |
| 952 ** %-conversion extensions. | |
| 953 */ | |
| 954 char *sqlite3_vmprintf(const char *zFormat, va_list ap){ | |
| 955 char *z; | |
| 956 char zBase[SQLITE_PRINT_BUF_SIZE]; | |
| 957 StrAccum acc; | |
| 958 | |
| 959 #ifdef SQLITE_ENABLE_API_ARMOR | |
| 960 if( zFormat==0 ){ | |
| 961 (void)SQLITE_MISUSE_BKPT; | |
| 962 return 0; | |
| 963 } | |
| 964 #endif | |
| 965 #ifndef SQLITE_OMIT_AUTOINIT | |
| 966 if( sqlite3_initialize() ) return 0; | |
| 967 #endif | |
| 968 sqlite3StrAccumInit(&acc, 0, zBase, sizeof(zBase), SQLITE_MAX_LENGTH); | |
| 969 sqlite3VXPrintf(&acc, 0, zFormat, ap); | |
| 970 z = sqlite3StrAccumFinish(&acc); | |
| 971 return z; | |
| 972 } | |
| 973 | |
| 974 /* | |
| 975 ** Print into memory obtained from sqlite3_malloc()(). Omit the internal | |
| 976 ** %-conversion extensions. | |
| 977 */ | |
| 978 char *sqlite3_mprintf(const char *zFormat, ...){ | |
| 979 va_list ap; | |
| 980 char *z; | |
| 981 #ifndef SQLITE_OMIT_AUTOINIT | |
| 982 if( sqlite3_initialize() ) return 0; | |
| 983 #endif | |
| 984 va_start(ap, zFormat); | |
| 985 z = sqlite3_vmprintf(zFormat, ap); | |
| 986 va_end(ap); | |
| 987 return z; | |
| 988 } | |
| 989 | |
| 990 /* | |
| 991 ** sqlite3_snprintf() works like snprintf() except that it ignores the | |
| 992 ** current locale settings. This is important for SQLite because we | |
| 993 ** are not able to use a "," as the decimal point in place of "." as | |
| 994 ** specified by some locales. | |
| 995 ** | |
| 996 ** Oops: The first two arguments of sqlite3_snprintf() are backwards | |
| 997 ** from the snprintf() standard. Unfortunately, it is too late to change | |
| 998 ** this without breaking compatibility, so we just have to live with the | |
| 999 ** mistake. | |
| 1000 ** | |
| 1001 ** sqlite3_vsnprintf() is the varargs version. | |
| 1002 */ | |
| 1003 char *sqlite3_vsnprintf(int n, char *zBuf, const char *zFormat, va_list ap){ | |
| 1004 StrAccum acc; | |
| 1005 if( n<=0 ) return zBuf; | |
| 1006 #ifdef SQLITE_ENABLE_API_ARMOR | |
| 1007 if( zBuf==0 || zFormat==0 ) { | |
| 1008 (void)SQLITE_MISUSE_BKPT; | |
| 1009 if( zBuf ) zBuf[0] = 0; | |
| 1010 return zBuf; | |
| 1011 } | |
| 1012 #endif | |
| 1013 sqlite3StrAccumInit(&acc, 0, zBuf, n, 0); | |
| 1014 sqlite3VXPrintf(&acc, 0, zFormat, ap); | |
| 1015 return sqlite3StrAccumFinish(&acc); | |
| 1016 } | |
| 1017 char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){ | |
| 1018 char *z; | |
| 1019 va_list ap; | |
| 1020 va_start(ap,zFormat); | |
| 1021 z = sqlite3_vsnprintf(n, zBuf, zFormat, ap); | |
| 1022 va_end(ap); | |
| 1023 return z; | |
| 1024 } | |
| 1025 | |
| 1026 /* | |
| 1027 ** This is the routine that actually formats the sqlite3_log() message. | |
| 1028 ** We house it in a separate routine from sqlite3_log() to avoid using | |
| 1029 ** stack space on small-stack systems when logging is disabled. | |
| 1030 ** | |
| 1031 ** sqlite3_log() must render into a static buffer. It cannot dynamically | |
| 1032 ** allocate memory because it might be called while the memory allocator | |
| 1033 ** mutex is held. | |
| 1034 ** | |
| 1035 ** sqlite3VXPrintf() might ask for *temporary* memory allocations for | |
| 1036 ** certain format characters (%q) or for very large precisions or widths. | |
| 1037 ** Care must be taken that any sqlite3_log() calls that occur while the | |
| 1038 ** memory mutex is held do not use these mechanisms. | |
| 1039 */ | |
| 1040 static void renderLogMsg(int iErrCode, const char *zFormat, va_list ap){ | |
| 1041 StrAccum acc; /* String accumulator */ | |
| 1042 char zMsg[SQLITE_PRINT_BUF_SIZE*3]; /* Complete log message */ | |
| 1043 | |
| 1044 sqlite3StrAccumInit(&acc, 0, zMsg, sizeof(zMsg), 0); | |
| 1045 sqlite3VXPrintf(&acc, 0, zFormat, ap); | |
| 1046 sqlite3GlobalConfig.xLog(sqlite3GlobalConfig.pLogArg, iErrCode, | |
| 1047 sqlite3StrAccumFinish(&acc)); | |
| 1048 } | |
| 1049 | |
| 1050 /* | |
| 1051 ** Format and write a message to the log if logging is enabled. | |
| 1052 */ | |
| 1053 void sqlite3_log(int iErrCode, const char *zFormat, ...){ | |
| 1054 va_list ap; /* Vararg list */ | |
| 1055 if( sqlite3GlobalConfig.xLog ){ | |
| 1056 va_start(ap, zFormat); | |
| 1057 renderLogMsg(iErrCode, zFormat, ap); | |
| 1058 va_end(ap); | |
| 1059 } | |
| 1060 } | |
| 1061 | |
| 1062 #if defined(SQLITE_DEBUG) || defined(SQLITE_HAVE_OS_TRACE) | |
| 1063 /* | |
| 1064 ** A version of printf() that understands %lld. Used for debugging. | |
| 1065 ** The printf() built into some versions of windows does not understand %lld | |
| 1066 ** and segfaults if you give it a long long int. | |
| 1067 */ | |
| 1068 void sqlite3DebugPrintf(const char *zFormat, ...){ | |
| 1069 va_list ap; | |
| 1070 StrAccum acc; | |
| 1071 char zBuf[500]; | |
| 1072 sqlite3StrAccumInit(&acc, 0, zBuf, sizeof(zBuf), 0); | |
| 1073 va_start(ap,zFormat); | |
| 1074 sqlite3VXPrintf(&acc, 0, zFormat, ap); | |
| 1075 va_end(ap); | |
| 1076 sqlite3StrAccumFinish(&acc); | |
| 1077 fprintf(stdout,"%s", zBuf); | |
| 1078 fflush(stdout); | |
| 1079 } | |
| 1080 #endif | |
| 1081 | |
| 1082 | |
| 1083 /* | |
| 1084 ** variable-argument wrapper around sqlite3VXPrintf(). The bFlags argument | |
| 1085 ** can contain the bit SQLITE_PRINTF_INTERNAL enable internal formats. | |
| 1086 */ | |
| 1087 void sqlite3XPrintf(StrAccum *p, u32 bFlags, const char *zFormat, ...){ | |
| 1088 va_list ap; | |
| 1089 va_start(ap,zFormat); | |
| 1090 sqlite3VXPrintf(p, bFlags, zFormat, ap); | |
| 1091 va_end(ap); | |
| 1092 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2846743003:
[sql] Remove SQLite 3.10.2 reference directory. (Closed)
