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| 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 They are very out-of-date but might be useful as | |
| 5 ** an historical reference.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 ** $Id: printf.c,v 1.104 2009/06/03 01:24:54 drh Exp $ | |
| 9 ** | |
| 10 ************************************************************************** | |
| 11 ** | |
| 12 ** The following modules is an enhanced replacement for the "printf" subroutines | |
| 13 ** found in the standard C library. The following enhancements are | |
| 14 ** supported: | |
| 15 ** | |
| 16 ** + Additional functions. The standard set of "printf" functions | |
| 17 ** includes printf, fprintf, sprintf, vprintf, vfprintf, and | |
| 18 ** vsprintf. This module adds the following: | |
| 19 ** | |
| 20 ** * snprintf -- Works like sprintf, but has an extra argument | |
| 21 ** which is the size of the buffer written to. | |
| 22 ** | |
| 23 ** * mprintf -- Similar to sprintf. Writes output to memory | |
| 24 ** obtained from malloc. | |
| 25 ** | |
| 26 ** * xprintf -- Calls a function to dispose of output. | |
| 27 ** | |
| 28 ** * nprintf -- No output, but returns the number of characters | |
| 29 ** that would have been output by printf. | |
| 30 ** | |
| 31 ** * A v- version (ex: vsnprintf) of every function is also | |
| 32 ** supplied. | |
| 33 ** | |
| 34 ** + A few extensions to the formatting notation are supported: | |
| 35 ** | |
| 36 ** * The "=" flag (similar to "-") causes the output to be | |
| 37 ** be centered in the appropriately sized field. | |
| 38 ** | |
| 39 ** * The %b field outputs an integer in binary notation. | |
| 40 ** | |
| 41 ** * The %c field now accepts a precision. The character output | |
| 42 ** is repeated by the number of times the precision specifies. | |
| 43 ** | |
| 44 ** * The %' field works like %c, but takes as its character the | |
| 45 ** next character of the format string, instead of the next | |
| 46 ** argument. For example, printf("%.78'-") prints 78 minus | |
| 47 ** signs, the same as printf("%.78c",'-'). | |
| 48 ** | |
| 49 ** + When compiled using GCC on a SPARC, this version of printf is | |
| 50 ** faster than the library printf for SUN OS 4.1. | |
| 51 ** | |
| 52 ** + All functions are fully reentrant. | |
| 53 ** | |
| 54 */ | |
| 55 #include "sqliteInt.h" | |
| 56 | |
| 57 /* | |
| 58 ** Conversion types fall into various categories as defined by the | |
| 59 ** following enumeration. | |
| 60 */ | |
| 61 #define etRADIX 1 /* Integer types. %d, %x, %o, and so forth */ | |
| 62 #define etFLOAT 2 /* Floating point. %f */ | |
| 63 #define etEXP 3 /* Exponentional notation. %e and %E */ | |
| 64 #define etGENERIC 4 /* Floating or exponential, depending on exponent. %g */ | |
| 65 #define etSIZE 5 /* Return number of characters processed so far. %n */ | |
| 66 #define etSTRING 6 /* Strings. %s */ | |
| 67 #define etDYNSTRING 7 /* Dynamically allocated strings. %z */ | |
| 68 #define etPERCENT 8 /* Percent symbol. %% */ | |
| 69 #define etCHARX 9 /* Characters. %c */ | |
| 70 /* The rest are extensions, not normally found in printf() */ | |
| 71 #define etSQLESCAPE 10 /* Strings with '\'' doubled. %q */ | |
| 72 #define etSQLESCAPE2 11 /* Strings with '\'' doubled and enclosed in '', | |
| 73 NULL pointers replaced by SQL NULL. %Q */ | |
| 74 #define etTOKEN 12 /* a pointer to a Token structure */ | |
| 75 #define etSRCLIST 13 /* a pointer to a SrcList */ | |
| 76 #define etPOINTER 14 /* The %p conversion */ | |
| 77 #define etSQLESCAPE3 15 /* %w -> Strings with '\"' doubled */ | |
| 78 #define etORDINAL 16 /* %r -> 1st, 2nd, 3rd, 4th, etc. English only */ | |
| 79 | |
| 80 #define etINVALID 0 /* Any unrecognized conversion type */ | |
| 81 | |
| 82 | |
| 83 /* | |
| 84 ** An "etByte" is an 8-bit unsigned value. | |
| 85 */ | |
| 86 typedef unsigned char etByte; | |
| 87 | |
| 88 /* | |
| 89 ** Each builtin conversion character (ex: the 'd' in "%d") is described | |
| 90 ** by an instance of the following structure | |
| 91 */ | |
| 92 typedef struct et_info { /* Information about each format field */ | |
| 93 char fmttype; /* The format field code letter */ | |
| 94 etByte base; /* The base for radix conversion */ | |
| 95 etByte flags; /* One or more of FLAG_ constants below */ | |
| 96 etByte type; /* Conversion paradigm */ | |
| 97 etByte charset; /* Offset into aDigits[] of the digits string */ | |
| 98 etByte prefix; /* Offset into aPrefix[] of the prefix string */ | |
| 99 } et_info; | |
| 100 | |
| 101 /* | |
| 102 ** Allowed values for et_info.flags | |
| 103 */ | |
| 104 #define FLAG_SIGNED 1 /* True if the value to convert is signed */ | |
| 105 #define FLAG_INTERN 2 /* True if for internal use only */ | |
| 106 #define FLAG_STRING 4 /* Allow infinity precision */ | |
| 107 | |
| 108 | |
| 109 /* | |
| 110 ** The following table is searched linearly, so it is good to put the | |
| 111 ** most frequently used conversion types first. | |
| 112 */ | |
| 113 static const char aDigits[] = "0123456789ABCDEF0123456789abcdef"; | |
| 114 static const char aPrefix[] = "-x0\000X0"; | |
| 115 static const et_info fmtinfo[] = { | |
| 116 { 'd', 10, 1, etRADIX, 0, 0 }, | |
| 117 { 's', 0, 4, etSTRING, 0, 0 }, | |
| 118 { 'g', 0, 1, etGENERIC, 30, 0 }, | |
| 119 { 'z', 0, 4, etDYNSTRING, 0, 0 }, | |
| 120 { 'q', 0, 4, etSQLESCAPE, 0, 0 }, | |
| 121 { 'Q', 0, 4, etSQLESCAPE2, 0, 0 }, | |
| 122 { 'w', 0, 4, etSQLESCAPE3, 0, 0 }, | |
| 123 { 'c', 0, 0, etCHARX, 0, 0 }, | |
| 124 { 'o', 8, 0, etRADIX, 0, 2 }, | |
| 125 { 'u', 10, 0, etRADIX, 0, 0 }, | |
| 126 { 'x', 16, 0, etRADIX, 16, 1 }, | |
| 127 { 'X', 16, 0, etRADIX, 0, 4 }, | |
| 128 #ifndef SQLITE_OMIT_FLOATING_POINT | |
| 129 { 'f', 0, 1, etFLOAT, 0, 0 }, | |
| 130 { 'e', 0, 1, etEXP, 30, 0 }, | |
| 131 { 'E', 0, 1, etEXP, 14, 0 }, | |
| 132 { 'G', 0, 1, etGENERIC, 14, 0 }, | |
| 133 #endif | |
| 134 { 'i', 10, 1, etRADIX, 0, 0 }, | |
| 135 { 'n', 0, 0, etSIZE, 0, 0 }, | |
| 136 { '%', 0, 0, etPERCENT, 0, 0 }, | |
| 137 { 'p', 16, 0, etPOINTER, 0, 1 }, | |
| 138 | |
| 139 /* All the rest have the FLAG_INTERN bit set and are thus for internal | |
| 140 ** use only */ | |
| 141 { 'T', 0, 2, etTOKEN, 0, 0 }, | |
| 142 { 'S', 0, 2, etSRCLIST, 0, 0 }, | |
| 143 { 'r', 10, 3, etORDINAL, 0, 0 }, | |
| 144 }; | |
| 145 | |
| 146 /* | |
| 147 ** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point | |
| 148 ** conversions will work. | |
| 149 */ | |
| 150 #ifndef SQLITE_OMIT_FLOATING_POINT | |
| 151 /* | |
| 152 ** "*val" is a double such that 0.1 <= *val < 10.0 | |
| 153 ** Return the ascii code for the leading digit of *val, then | |
| 154 ** multiply "*val" by 10.0 to renormalize. | |
| 155 ** | |
| 156 ** Example: | |
| 157 ** input: *val = 3.14159 | |
| 158 ** output: *val = 1.4159 function return = '3' | |
| 159 ** | |
| 160 ** The counter *cnt is incremented each time. After counter exceeds | |
| 161 ** 16 (the number of significant digits in a 64-bit float) '0' is | |
| 162 ** always returned. | |
| 163 */ | |
| 164 static char et_getdigit(LONGDOUBLE_TYPE *val, int *cnt){ | |
| 165 int digit; | |
| 166 LONGDOUBLE_TYPE d; | |
| 167 if( (*cnt)++ >= 16 ) return '0'; | |
| 168 digit = (int)*val; | |
| 169 d = digit; | |
| 170 digit += '0'; | |
| 171 *val = (*val - d)*10.0; | |
| 172 return (char)digit; | |
| 173 } | |
| 174 #endif /* SQLITE_OMIT_FLOATING_POINT */ | |
| 175 | |
| 176 /* | |
| 177 ** Append N space characters to the given string buffer. | |
| 178 */ | |
| 179 static void appendSpace(StrAccum *pAccum, int N){ | |
| 180 static const char zSpaces[] = " "; | |
| 181 while( N>=(int)sizeof(zSpaces)-1 ){ | |
| 182 sqlite3StrAccumAppend(pAccum, zSpaces, sizeof(zSpaces)-1); | |
| 183 N -= sizeof(zSpaces)-1; | |
| 184 } | |
| 185 if( N>0 ){ | |
| 186 sqlite3StrAccumAppend(pAccum, zSpaces, N); | |
| 187 } | |
| 188 } | |
| 189 | |
| 190 /* | |
| 191 ** On machines with a small stack size, you can redefine the | |
| 192 ** SQLITE_PRINT_BUF_SIZE to be less than 350. | |
| 193 */ | |
| 194 #ifndef SQLITE_PRINT_BUF_SIZE | |
| 195 # if defined(SQLITE_SMALL_STACK) | |
| 196 # define SQLITE_PRINT_BUF_SIZE 50 | |
| 197 # else | |
| 198 # define SQLITE_PRINT_BUF_SIZE 350 | |
| 199 # endif | |
| 200 #endif | |
| 201 #define etBUFSIZE SQLITE_PRINT_BUF_SIZE /* Size of the output buffer */ | |
| 202 | |
| 203 /* | |
| 204 ** The root program. All variations call this core. | |
| 205 ** | |
| 206 ** INPUTS: | |
| 207 ** func This is a pointer to a function taking three arguments | |
| 208 ** 1. A pointer to anything. Same as the "arg" parameter. | |
| 209 ** 2. A pointer to the list of characters to be output | |
| 210 ** (Note, this list is NOT null terminated.) | |
| 211 ** 3. An integer number of characters to be output. | |
| 212 ** (Note: This number might be zero.) | |
| 213 ** | |
| 214 ** arg This is the pointer to anything which will be passed as the | |
| 215 ** first argument to "func". Use it for whatever you like. | |
| 216 ** | |
| 217 ** fmt This is the format string, as in the usual print. | |
| 218 ** | |
| 219 ** ap This is a pointer to a list of arguments. Same as in | |
| 220 ** vfprint. | |
| 221 ** | |
| 222 ** OUTPUTS: | |
| 223 ** The return value is the total number of characters sent to | |
| 224 ** the function "func". Returns -1 on a error. | |
| 225 ** | |
| 226 ** Note that the order in which automatic variables are declared below | |
| 227 ** seems to make a big difference in determining how fast this beast | |
| 228 ** will run. | |
| 229 */ | |
| 230 void sqlite3VXPrintf( | |
| 231 StrAccum *pAccum, /* Accumulate results here */ | |
| 232 int useExtended, /* Allow extended %-conversions */ | |
| 233 const char *fmt, /* Format string */ | |
| 234 va_list ap /* arguments */ | |
| 235 ){ | |
| 236 int c; /* Next character in the format string */ | |
| 237 char *bufpt; /* Pointer to the conversion buffer */ | |
| 238 int precision; /* Precision of the current field */ | |
| 239 int length; /* Length of the field */ | |
| 240 int idx; /* A general purpose loop counter */ | |
| 241 int width; /* Width of the current field */ | |
| 242 etByte flag_leftjustify; /* True if "-" flag is present */ | |
| 243 etByte flag_plussign; /* True if "+" flag is present */ | |
| 244 etByte flag_blanksign; /* True if " " flag is present */ | |
| 245 etByte flag_alternateform; /* True if "#" flag is present */ | |
| 246 etByte flag_altform2; /* True if "!" flag is present */ | |
| 247 etByte flag_zeropad; /* True if field width constant starts with zero */ | |
| 248 etByte flag_long; /* True if "l" flag is present */ | |
| 249 etByte flag_longlong; /* True if the "ll" flag is present */ | |
| 250 etByte done; /* Loop termination flag */ | |
| 251 sqlite_uint64 longvalue; /* Value for integer types */ | |
| 252 LONGDOUBLE_TYPE realvalue; /* Value for real types */ | |
| 253 const et_info *infop; /* Pointer to the appropriate info structure */ | |
| 254 char buf[etBUFSIZE]; /* Conversion buffer */ | |
| 255 char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */ | |
| 256 etByte xtype = 0; /* Conversion paradigm */ | |
| 257 char *zExtra; /* Extra memory used for etTCLESCAPE conversions */ | |
| 258 #ifndef SQLITE_OMIT_FLOATING_POINT | |
| 259 int exp, e2; /* exponent of real numbers */ | |
| 260 double rounder; /* Used for rounding floating point values */ | |
| 261 etByte flag_dp; /* True if decimal point should be shown */ | |
| 262 etByte flag_rtz; /* True if trailing zeros should be removed */ | |
| 263 etByte flag_exp; /* True to force display of the exponent */ | |
| 264 int nsd; /* Number of significant digits returned */ | |
| 265 #endif | |
| 266 | |
| 267 length = 0; | |
| 268 bufpt = 0; | |
| 269 for(; (c=(*fmt))!=0; ++fmt){ | |
| 270 if( c!='%' ){ | |
| 271 int amt; | |
| 272 bufpt = (char *)fmt; | |
| 273 amt = 1; | |
| 274 while( (c=(*++fmt))!='%' && c!=0 ) amt++; | |
| 275 sqlite3StrAccumAppend(pAccum, bufpt, amt); | |
| 276 if( c==0 ) break; | |
| 277 } | |
| 278 if( (c=(*++fmt))==0 ){ | |
| 279 sqlite3StrAccumAppend(pAccum, "%", 1); | |
| 280 break; | |
| 281 } | |
| 282 /* Find out what flags are present */ | |
| 283 flag_leftjustify = flag_plussign = flag_blanksign = | |
| 284 flag_alternateform = flag_altform2 = flag_zeropad = 0; | |
| 285 done = 0; | |
| 286 do{ | |
| 287 switch( c ){ | |
| 288 case '-': flag_leftjustify = 1; break; | |
| 289 case '+': flag_plussign = 1; break; | |
| 290 case ' ': flag_blanksign = 1; break; | |
| 291 case '#': flag_alternateform = 1; break; | |
| 292 case '!': flag_altform2 = 1; break; | |
| 293 case '0': flag_zeropad = 1; break; | |
| 294 default: done = 1; break; | |
| 295 } | |
| 296 }while( !done && (c=(*++fmt))!=0 ); | |
| 297 /* Get the field width */ | |
| 298 width = 0; | |
| 299 if( c=='*' ){ | |
| 300 width = va_arg(ap,int); | |
| 301 if( width<0 ){ | |
| 302 flag_leftjustify = 1; | |
| 303 width = -width; | |
| 304 } | |
| 305 c = *++fmt; | |
| 306 }else{ | |
| 307 while( c>='0' && c<='9' ){ | |
| 308 width = width*10 + c - '0'; | |
| 309 c = *++fmt; | |
| 310 } | |
| 311 } | |
| 312 if( width > etBUFSIZE-10 ){ | |
| 313 width = etBUFSIZE-10; | |
| 314 } | |
| 315 /* Get the precision */ | |
| 316 if( c=='.' ){ | |
| 317 precision = 0; | |
| 318 c = *++fmt; | |
| 319 if( c=='*' ){ | |
| 320 precision = va_arg(ap,int); | |
| 321 if( precision<0 ) precision = -precision; | |
| 322 c = *++fmt; | |
| 323 }else{ | |
| 324 while( c>='0' && c<='9' ){ | |
| 325 precision = precision*10 + c - '0'; | |
| 326 c = *++fmt; | |
| 327 } | |
| 328 } | |
| 329 }else{ | |
| 330 precision = -1; | |
| 331 } | |
| 332 /* Get the conversion type modifier */ | |
| 333 if( c=='l' ){ | |
| 334 flag_long = 1; | |
| 335 c = *++fmt; | |
| 336 if( c=='l' ){ | |
| 337 flag_longlong = 1; | |
| 338 c = *++fmt; | |
| 339 }else{ | |
| 340 flag_longlong = 0; | |
| 341 } | |
| 342 }else{ | |
| 343 flag_long = flag_longlong = 0; | |
| 344 } | |
| 345 /* Fetch the info entry for the field */ | |
| 346 infop = &fmtinfo[0]; | |
| 347 xtype = etINVALID; | |
| 348 for(idx=0; idx<ArraySize(fmtinfo); idx++){ | |
| 349 if( c==fmtinfo[idx].fmttype ){ | |
| 350 infop = &fmtinfo[idx]; | |
| 351 if( useExtended || (infop->flags & FLAG_INTERN)==0 ){ | |
| 352 xtype = infop->type; | |
| 353 }else{ | |
| 354 return; | |
| 355 } | |
| 356 break; | |
| 357 } | |
| 358 } | |
| 359 zExtra = 0; | |
| 360 | |
| 361 | |
| 362 /* Limit the precision to prevent overflowing buf[] during conversion */ | |
| 363 if( precision>etBUFSIZE-40 && (infop->flags & FLAG_STRING)==0 ){ | |
| 364 precision = etBUFSIZE-40; | |
| 365 } | |
| 366 | |
| 367 /* | |
| 368 ** At this point, variables are initialized as follows: | |
| 369 ** | |
| 370 ** flag_alternateform TRUE if a '#' is present. | |
| 371 ** flag_altform2 TRUE if a '!' is present. | |
| 372 ** flag_plussign TRUE if a '+' is present. | |
| 373 ** flag_leftjustify TRUE if a '-' is present or if the | |
| 374 ** field width was negative. | |
| 375 ** flag_zeropad TRUE if the width began with 0. | |
| 376 ** flag_long TRUE if the letter 'l' (ell) prefixed | |
| 377 ** the conversion character. | |
| 378 ** flag_longlong TRUE if the letter 'll' (ell ell) prefixed | |
| 379 ** the conversion character. | |
| 380 ** flag_blanksign TRUE if a ' ' is present. | |
| 381 ** width The specified field width. This is | |
| 382 ** always non-negative. Zero is the default. | |
| 383 ** precision The specified precision. The default | |
| 384 ** is -1. | |
| 385 ** xtype The class of the conversion. | |
| 386 ** infop Pointer to the appropriate info struct. | |
| 387 */ | |
| 388 switch( xtype ){ | |
| 389 case etPOINTER: | |
| 390 flag_longlong = sizeof(char*)==sizeof(i64); | |
| 391 flag_long = sizeof(char*)==sizeof(long int); | |
| 392 /* Fall through into the next case */ | |
| 393 case etORDINAL: | |
| 394 case etRADIX: | |
| 395 if( infop->flags & FLAG_SIGNED ){ | |
| 396 i64 v; | |
| 397 if( flag_longlong ){ | |
| 398 v = va_arg(ap,i64); | |
| 399 }else if( flag_long ){ | |
| 400 v = va_arg(ap,long int); | |
| 401 }else{ | |
| 402 v = va_arg(ap,int); | |
| 403 } | |
| 404 if( v<0 ){ | |
| 405 longvalue = -v; | |
| 406 prefix = '-'; | |
| 407 }else{ | |
| 408 longvalue = v; | |
| 409 if( flag_plussign ) prefix = '+'; | |
| 410 else if( flag_blanksign ) prefix = ' '; | |
| 411 else prefix = 0; | |
| 412 } | |
| 413 }else{ | |
| 414 if( flag_longlong ){ | |
| 415 longvalue = va_arg(ap,u64); | |
| 416 }else if( flag_long ){ | |
| 417 longvalue = va_arg(ap,unsigned long int); | |
| 418 }else{ | |
| 419 longvalue = va_arg(ap,unsigned int); | |
| 420 } | |
| 421 prefix = 0; | |
| 422 } | |
| 423 if( longvalue==0 ) flag_alternateform = 0; | |
| 424 if( flag_zeropad && precision<width-(prefix!=0) ){ | |
| 425 precision = width-(prefix!=0); | |
| 426 } | |
| 427 bufpt = &buf[etBUFSIZE-1]; | |
| 428 if( xtype==etORDINAL ){ | |
| 429 static const char zOrd[] = "thstndrd"; | |
| 430 int x = (int)(longvalue % 10); | |
| 431 if( x>=4 || (longvalue/10)%10==1 ){ | |
| 432 x = 0; | |
| 433 } | |
| 434 buf[etBUFSIZE-3] = zOrd[x*2]; | |
| 435 buf[etBUFSIZE-2] = zOrd[x*2+1]; | |
| 436 bufpt -= 2; | |
| 437 } | |
| 438 { | |
| 439 register const char *cset; /* Use registers for speed */ | |
| 440 register int base; | |
| 441 cset = &aDigits[infop->charset]; | |
| 442 base = infop->base; | |
| 443 do{ /* Convert to ascii */ | |
| 444 *(--bufpt) = cset[longvalue%base]; | |
| 445 longvalue = longvalue/base; | |
| 446 }while( longvalue>0 ); | |
| 447 } | |
| 448 length = (int)(&buf[etBUFSIZE-1]-bufpt); | |
| 449 for(idx=precision-length; idx>0; idx--){ | |
| 450 *(--bufpt) = '0'; /* Zero pad */ | |
| 451 } | |
| 452 if( prefix ) *(--bufpt) = prefix; /* Add sign */ | |
| 453 if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */ | |
| 454 const char *pre; | |
| 455 char x; | |
| 456 pre = &aPrefix[infop->prefix]; | |
| 457 for(; (x=(*pre))!=0; pre++) *(--bufpt) = x; | |
| 458 } | |
| 459 length = (int)(&buf[etBUFSIZE-1]-bufpt); | |
| 460 break; | |
| 461 case etFLOAT: | |
| 462 case etEXP: | |
| 463 case etGENERIC: | |
| 464 realvalue = va_arg(ap,double); | |
| 465 #ifndef SQLITE_OMIT_FLOATING_POINT | |
| 466 if( precision<0 ) precision = 6; /* Set default precision */ | |
| 467 if( precision>etBUFSIZE/2-10 ) precision = etBUFSIZE/2-10; | |
| 468 if( realvalue<0.0 ){ | |
| 469 realvalue = -realvalue; | |
| 470 prefix = '-'; | |
| 471 }else{ | |
| 472 if( flag_plussign ) prefix = '+'; | |
| 473 else if( flag_blanksign ) prefix = ' '; | |
| 474 else prefix = 0; | |
| 475 } | |
| 476 if( xtype==etGENERIC && precision>0 ) precision--; | |
| 477 #if 0 | |
| 478 /* Rounding works like BSD when the constant 0.4999 is used. Wierd! */ | |
| 479 for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1); | |
| 480 #else | |
| 481 /* It makes more sense to use 0.5 */ | |
| 482 for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){} | |
| 483 #endif | |
| 484 if( xtype==etFLOAT ) realvalue += rounder; | |
| 485 /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */ | |
| 486 exp = 0; | |
| 487 if( sqlite3IsNaN((double)realvalue) ){ | |
| 488 bufpt = "NaN"; | |
| 489 length = 3; | |
| 490 break; | |
| 491 } | |
| 492 if( realvalue>0.0 ){ | |
| 493 while( realvalue>=1e32 && exp<=350 ){ realvalue *= 1e-32; exp+=32; } | |
| 494 while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; } | |
| 495 while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; } | |
| 496 while( realvalue<1e-8 ){ realvalue *= 1e8; exp-=8; } | |
| 497 while( realvalue<1.0 ){ realvalue *= 10.0; exp--; } | |
| 498 if( exp>350 ){ | |
| 499 if( prefix=='-' ){ | |
| 500 bufpt = "-Inf"; | |
| 501 }else if( prefix=='+' ){ | |
| 502 bufpt = "+Inf"; | |
| 503 }else{ | |
| 504 bufpt = "Inf"; | |
| 505 } | |
| 506 length = sqlite3Strlen30(bufpt); | |
| 507 break; | |
| 508 } | |
| 509 } | |
| 510 bufpt = buf; | |
| 511 /* | |
| 512 ** If the field type is etGENERIC, then convert to either etEXP | |
| 513 ** or etFLOAT, as appropriate. | |
| 514 */ | |
| 515 flag_exp = xtype==etEXP; | |
| 516 if( xtype!=etFLOAT ){ | |
| 517 realvalue += rounder; | |
| 518 if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; } | |
| 519 } | |
| 520 if( xtype==etGENERIC ){ | |
| 521 flag_rtz = !flag_alternateform; | |
| 522 if( exp<-4 || exp>precision ){ | |
| 523 xtype = etEXP; | |
| 524 }else{ | |
| 525 precision = precision - exp; | |
| 526 xtype = etFLOAT; | |
| 527 } | |
| 528 }else{ | |
| 529 flag_rtz = 0; | |
| 530 } | |
| 531 if( xtype==etEXP ){ | |
| 532 e2 = 0; | |
| 533 }else{ | |
| 534 e2 = exp; | |
| 535 } | |
| 536 nsd = 0; | |
| 537 flag_dp = (precision>0 ?1:0) | flag_alternateform | flag_altform2; | |
| 538 /* The sign in front of the number */ | |
| 539 if( prefix ){ | |
| 540 *(bufpt++) = prefix; | |
| 541 } | |
| 542 /* Digits prior to the decimal point */ | |
| 543 if( e2<0 ){ | |
| 544 *(bufpt++) = '0'; | |
| 545 }else{ | |
| 546 for(; e2>=0; e2--){ | |
| 547 *(bufpt++) = et_getdigit(&realvalue,&nsd); | |
| 548 } | |
| 549 } | |
| 550 /* The decimal point */ | |
| 551 if( flag_dp ){ | |
| 552 *(bufpt++) = '.'; | |
| 553 } | |
| 554 /* "0" digits after the decimal point but before the first | |
| 555 ** significant digit of the number */ | |
| 556 for(e2++; e2<0; precision--, e2++){ | |
| 557 assert( precision>0 ); | |
| 558 *(bufpt++) = '0'; | |
| 559 } | |
| 560 /* Significant digits after the decimal point */ | |
| 561 while( (precision--)>0 ){ | |
| 562 *(bufpt++) = et_getdigit(&realvalue,&nsd); | |
| 563 } | |
| 564 /* Remove trailing zeros and the "." if no digits follow the "." */ | |
| 565 if( flag_rtz && flag_dp ){ | |
| 566 while( bufpt[-1]=='0' ) *(--bufpt) = 0; | |
| 567 assert( bufpt>buf ); | |
| 568 if( bufpt[-1]=='.' ){ | |
| 569 if( flag_altform2 ){ | |
| 570 *(bufpt++) = '0'; | |
| 571 }else{ | |
| 572 *(--bufpt) = 0; | |
| 573 } | |
| 574 } | |
| 575 } | |
| 576 /* Add the "eNNN" suffix */ | |
| 577 if( flag_exp || xtype==etEXP ){ | |
| 578 *(bufpt++) = aDigits[infop->charset]; | |
| 579 if( exp<0 ){ | |
| 580 *(bufpt++) = '-'; exp = -exp; | |
| 581 }else{ | |
| 582 *(bufpt++) = '+'; | |
| 583 } | |
| 584 if( exp>=100 ){ | |
| 585 *(bufpt++) = (char)((exp/100)+'0'); /* 100's digit */ | |
| 586 exp %= 100; | |
| 587 } | |
| 588 *(bufpt++) = (char)(exp/10+'0'); /* 10's digit */ | |
| 589 *(bufpt++) = (char)(exp%10+'0'); /* 1's digit */ | |
| 590 } | |
| 591 *bufpt = 0; | |
| 592 | |
| 593 /* The converted number is in buf[] and zero terminated. Output it. | |
| 594 ** Note that the number is in the usual order, not reversed as with | |
| 595 ** integer conversions. */ | |
| 596 length = (int)(bufpt-buf); | |
| 597 bufpt = buf; | |
| 598 | |
| 599 /* Special case: Add leading zeros if the flag_zeropad flag is | |
| 600 ** set and we are not left justified */ | |
| 601 if( flag_zeropad && !flag_leftjustify && length < width){ | |
| 602 int i; | |
| 603 int nPad = width - length; | |
| 604 for(i=width; i>=nPad; i--){ | |
| 605 bufpt[i] = bufpt[i-nPad]; | |
| 606 } | |
| 607 i = prefix!=0; | |
| 608 while( nPad-- ) bufpt[i++] = '0'; | |
| 609 length = width; | |
| 610 } | |
| 611 #endif | |
| 612 break; | |
| 613 case etSIZE: | |
| 614 *(va_arg(ap,int*)) = pAccum->nChar; | |
| 615 length = width = 0; | |
| 616 break; | |
| 617 case etPERCENT: | |
| 618 buf[0] = '%'; | |
| 619 bufpt = buf; | |
| 620 length = 1; | |
| 621 break; | |
| 622 case etCHARX: | |
| 623 c = va_arg(ap,int); | |
| 624 buf[0] = (char)c; | |
| 625 if( precision>=0 ){ | |
| 626 for(idx=1; idx<precision; idx++) buf[idx] = (char)c; | |
| 627 length = precision; | |
| 628 }else{ | |
| 629 length =1; | |
| 630 } | |
| 631 bufpt = buf; | |
| 632 break; | |
| 633 case etSTRING: | |
| 634 case etDYNSTRING: | |
| 635 bufpt = va_arg(ap,char*); | |
| 636 if( bufpt==0 ){ | |
| 637 bufpt = ""; | |
| 638 }else if( xtype==etDYNSTRING ){ | |
| 639 zExtra = bufpt; | |
| 640 } | |
| 641 if( precision>=0 ){ | |
| 642 for(length=0; length<precision && bufpt[length]; length++){} | |
| 643 }else{ | |
| 644 length = sqlite3Strlen30(bufpt); | |
| 645 } | |
| 646 break; | |
| 647 case etSQLESCAPE: | |
| 648 case etSQLESCAPE2: | |
| 649 case etSQLESCAPE3: { | |
| 650 int i, j, n, isnull; | |
| 651 int needQuote; | |
| 652 char ch; | |
| 653 char q = ((xtype==etSQLESCAPE3)?'"':'\''); /* Quote character */ | |
| 654 char *escarg = va_arg(ap,char*); | |
| 655 isnull = escarg==0; | |
| 656 if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)"); | |
| 657 for(i=n=0; (ch=escarg[i])!=0; i++){ | |
| 658 if( ch==q ) n++; | |
| 659 } | |
| 660 needQuote = !isnull && xtype==etSQLESCAPE2; | |
| 661 n += i + 1 + needQuote*2; | |
| 662 if( n>etBUFSIZE ){ | |
| 663 bufpt = zExtra = sqlite3Malloc( n ); | |
| 664 if( bufpt==0 ){ | |
| 665 pAccum->mallocFailed = 1; | |
| 666 return; | |
| 667 } | |
| 668 }else{ | |
| 669 bufpt = buf; | |
| 670 } | |
| 671 j = 0; | |
| 672 if( needQuote ) bufpt[j++] = q; | |
| 673 for(i=0; (ch=escarg[i])!=0; i++){ | |
| 674 bufpt[j++] = ch; | |
| 675 if( ch==q ) bufpt[j++] = ch; | |
| 676 } | |
| 677 if( needQuote ) bufpt[j++] = q; | |
| 678 bufpt[j] = 0; | |
| 679 length = j; | |
| 680 /* The precision is ignored on %q and %Q */ | |
| 681 /* if( precision>=0 && precision<length ) length = precision; */ | |
| 682 break; | |
| 683 } | |
| 684 case etTOKEN: { | |
| 685 Token *pToken = va_arg(ap, Token*); | |
| 686 if( pToken ){ | |
| 687 sqlite3StrAccumAppend(pAccum, (const char*)pToken->z, pToken->n); | |
| 688 } | |
| 689 length = width = 0; | |
| 690 break; | |
| 691 } | |
| 692 case etSRCLIST: { | |
| 693 SrcList *pSrc = va_arg(ap, SrcList*); | |
| 694 int k = va_arg(ap, int); | |
| 695 struct SrcList_item *pItem = &pSrc->a[k]; | |
| 696 assert( k>=0 && k<pSrc->nSrc ); | |
| 697 if( pItem->zDatabase ){ | |
| 698 sqlite3StrAccumAppend(pAccum, pItem->zDatabase, -1); | |
| 699 sqlite3StrAccumAppend(pAccum, ".", 1); | |
| 700 } | |
| 701 sqlite3StrAccumAppend(pAccum, pItem->zName, -1); | |
| 702 length = width = 0; | |
| 703 break; | |
| 704 } | |
| 705 default: { | |
| 706 assert( xtype==etINVALID ); | |
| 707 return; | |
| 708 } | |
| 709 }/* End switch over the format type */ | |
| 710 /* | |
| 711 ** The text of the conversion is pointed to by "bufpt" and is | |
| 712 ** "length" characters long. The field width is "width". Do | |
| 713 ** the output. | |
| 714 */ | |
| 715 if( !flag_leftjustify ){ | |
| 716 register int nspace; | |
| 717 nspace = width-length; | |
| 718 if( nspace>0 ){ | |
| 719 appendSpace(pAccum, nspace); | |
| 720 } | |
| 721 } | |
| 722 if( length>0 ){ | |
| 723 sqlite3StrAccumAppend(pAccum, bufpt, length); | |
| 724 } | |
| 725 if( flag_leftjustify ){ | |
| 726 register int nspace; | |
| 727 nspace = width-length; | |
| 728 if( nspace>0 ){ | |
| 729 appendSpace(pAccum, nspace); | |
| 730 } | |
| 731 } | |
| 732 if( zExtra ){ | |
| 733 sqlite3_free(zExtra); | |
| 734 } | |
| 735 }/* End for loop over the format string */ | |
| 736 } /* End of function */ | |
| 737 | |
| 738 /* | |
| 739 ** Append N bytes of text from z to the StrAccum object. | |
| 740 */ | |
| 741 void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){ | |
| 742 assert( z!=0 || N==0 ); | |
| 743 if( p->tooBig | p->mallocFailed ){ | |
| 744 testcase(p->tooBig); | |
| 745 testcase(p->mallocFailed); | |
| 746 return; | |
| 747 } | |
| 748 if( N<0 ){ | |
| 749 N = sqlite3Strlen30(z); | |
| 750 } | |
| 751 if( N==0 || NEVER(z==0) ){ | |
| 752 return; | |
| 753 } | |
| 754 if( p->nChar+N >= p->nAlloc ){ | |
| 755 char *zNew; | |
| 756 if( !p->useMalloc ){ | |
| 757 p->tooBig = 1; | |
| 758 N = p->nAlloc - p->nChar - 1; | |
| 759 if( N<=0 ){ | |
| 760 return; | |
| 761 } | |
| 762 }else{ | |
| 763 i64 szNew = p->nChar; | |
| 764 szNew += N + 1; | |
| 765 if( szNew > p->mxAlloc ){ | |
| 766 sqlite3StrAccumReset(p); | |
| 767 p->tooBig = 1; | |
| 768 return; | |
| 769 }else{ | |
| 770 p->nAlloc = (int)szNew; | |
| 771 } | |
| 772 zNew = sqlite3DbMallocRaw(p->db, p->nAlloc ); | |
| 773 if( zNew ){ | |
| 774 memcpy(zNew, p->zText, p->nChar); | |
| 775 sqlite3StrAccumReset(p); | |
| 776 p->zText = zNew; | |
| 777 }else{ | |
| 778 p->mallocFailed = 1; | |
| 779 sqlite3StrAccumReset(p); | |
| 780 return; | |
| 781 } | |
| 782 } | |
| 783 } | |
| 784 memcpy(&p->zText[p->nChar], z, N); | |
| 785 p->nChar += N; | |
| 786 } | |
| 787 | |
| 788 /* | |
| 789 ** Finish off a string by making sure it is zero-terminated. | |
| 790 ** Return a pointer to the resulting string. Return a NULL | |
| 791 ** pointer if any kind of error was encountered. | |
| 792 */ | |
| 793 char *sqlite3StrAccumFinish(StrAccum *p){ | |
| 794 if( p->zText ){ | |
| 795 p->zText[p->nChar] = 0; | |
| 796 if( p->useMalloc && p->zText==p->zBase ){ | |
| 797 p->zText = sqlite3DbMallocRaw(p->db, p->nChar+1 ); | |
| 798 if( p->zText ){ | |
| 799 memcpy(p->zText, p->zBase, p->nChar+1); | |
| 800 }else{ | |
| 801 p->mallocFailed = 1; | |
| 802 } | |
| 803 } | |
| 804 } | |
| 805 return p->zText; | |
| 806 } | |
| 807 | |
| 808 /* | |
| 809 ** Reset an StrAccum string. Reclaim all malloced memory. | |
| 810 */ | |
| 811 void sqlite3StrAccumReset(StrAccum *p){ | |
| 812 if( p->zText!=p->zBase ){ | |
| 813 sqlite3DbFree(p->db, p->zText); | |
| 814 } | |
| 815 p->zText = 0; | |
| 816 } | |
| 817 | |
| 818 /* | |
| 819 ** Initialize a string accumulator | |
| 820 */ | |
| 821 void sqlite3StrAccumInit(StrAccum *p, char *zBase, int n, int mx){ | |
| 822 p->zText = p->zBase = zBase; | |
| 823 p->db = 0; | |
| 824 p->nChar = 0; | |
| 825 p->nAlloc = n; | |
| 826 p->mxAlloc = mx; | |
| 827 p->useMalloc = 1; | |
| 828 p->tooBig = 0; | |
| 829 p->mallocFailed = 0; | |
| 830 } | |
| 831 | |
| 832 /* | |
| 833 ** Print into memory obtained from sqliteMalloc(). Use the internal | |
| 834 ** %-conversion extensions. | |
| 835 */ | |
| 836 char *sqlite3VMPrintf(sqlite3 *db, const char *zFormat, va_list ap){ | |
| 837 char *z; | |
| 838 char zBase[SQLITE_PRINT_BUF_SIZE]; | |
| 839 StrAccum acc; | |
| 840 assert( db!=0 ); | |
| 841 sqlite3StrAccumInit(&acc, zBase, sizeof(zBase), | |
| 842 db->aLimit[SQLITE_LIMIT_LENGTH]); | |
| 843 acc.db = db; | |
| 844 sqlite3VXPrintf(&acc, 1, zFormat, ap); | |
| 845 z = sqlite3StrAccumFinish(&acc); | |
| 846 if( acc.mallocFailed ){ | |
| 847 db->mallocFailed = 1; | |
| 848 } | |
| 849 return z; | |
| 850 } | |
| 851 | |
| 852 /* | |
| 853 ** Print into memory obtained from sqliteMalloc(). Use the internal | |
| 854 ** %-conversion extensions. | |
| 855 */ | |
| 856 char *sqlite3MPrintf(sqlite3 *db, const char *zFormat, ...){ | |
| 857 va_list ap; | |
| 858 char *z; | |
| 859 va_start(ap, zFormat); | |
| 860 z = sqlite3VMPrintf(db, zFormat, ap); | |
| 861 va_end(ap); | |
| 862 return z; | |
| 863 } | |
| 864 | |
| 865 /* | |
| 866 ** Like sqlite3MPrintf(), but call sqlite3DbFree() on zStr after formatting | |
| 867 ** the string and before returnning. This routine is intended to be used | |
| 868 ** to modify an existing string. For example: | |
| 869 ** | |
| 870 ** x = sqlite3MPrintf(db, x, "prefix %s suffix", x); | |
| 871 ** | |
| 872 */ | |
| 873 char *sqlite3MAppendf(sqlite3 *db, char *zStr, const char *zFormat, ...){ | |
| 874 va_list ap; | |
| 875 char *z; | |
| 876 va_start(ap, zFormat); | |
| 877 z = sqlite3VMPrintf(db, zFormat, ap); | |
| 878 va_end(ap); | |
| 879 sqlite3DbFree(db, zStr); | |
| 880 return z; | |
| 881 } | |
| 882 | |
| 883 /* | |
| 884 ** Print into memory obtained from sqlite3_malloc(). Omit the internal | |
| 885 ** %-conversion extensions. | |
| 886 */ | |
| 887 char *sqlite3_vmprintf(const char *zFormat, va_list ap){ | |
| 888 char *z; | |
| 889 char zBase[SQLITE_PRINT_BUF_SIZE]; | |
| 890 StrAccum acc; | |
| 891 #ifndef SQLITE_OMIT_AUTOINIT | |
| 892 if( sqlite3_initialize() ) return 0; | |
| 893 #endif | |
| 894 sqlite3StrAccumInit(&acc, zBase, sizeof(zBase), SQLITE_MAX_LENGTH); | |
| 895 sqlite3VXPrintf(&acc, 0, zFormat, ap); | |
| 896 z = sqlite3StrAccumFinish(&acc); | |
| 897 return z; | |
| 898 } | |
| 899 | |
| 900 /* | |
| 901 ** Print into memory obtained from sqlite3_malloc()(). Omit the internal | |
| 902 ** %-conversion extensions. | |
| 903 */ | |
| 904 char *sqlite3_mprintf(const char *zFormat, ...){ | |
| 905 va_list ap; | |
| 906 char *z; | |
| 907 #ifndef SQLITE_OMIT_AUTOINIT | |
| 908 if( sqlite3_initialize() ) return 0; | |
| 909 #endif | |
| 910 va_start(ap, zFormat); | |
| 911 z = sqlite3_vmprintf(zFormat, ap); | |
| 912 va_end(ap); | |
| 913 return z; | |
| 914 } | |
| 915 | |
| 916 /* | |
| 917 ** sqlite3_snprintf() works like snprintf() except that it ignores the | |
| 918 ** current locale settings. This is important for SQLite because we | |
| 919 ** are not able to use a "," as the decimal point in place of "." as | |
| 920 ** specified by some locales. | |
| 921 */ | |
| 922 char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){ | |
| 923 char *z; | |
| 924 va_list ap; | |
| 925 StrAccum acc; | |
| 926 | |
| 927 if( n<=0 ){ | |
| 928 return zBuf; | |
| 929 } | |
| 930 sqlite3StrAccumInit(&acc, zBuf, n, 0); | |
| 931 acc.useMalloc = 0; | |
| 932 va_start(ap,zFormat); | |
| 933 sqlite3VXPrintf(&acc, 0, zFormat, ap); | |
| 934 va_end(ap); | |
| 935 z = sqlite3StrAccumFinish(&acc); | |
| 936 return z; | |
| 937 } | |
| 938 | |
| 939 #if defined(SQLITE_DEBUG) | |
| 940 /* | |
| 941 ** A version of printf() that understands %lld. Used for debugging. | |
| 942 ** The printf() built into some versions of windows does not understand %lld | |
| 943 ** and segfaults if you give it a long long int. | |
| 944 */ | |
| 945 void sqlite3DebugPrintf(const char *zFormat, ...){ | |
| 946 va_list ap; | |
| 947 StrAccum acc; | |
| 948 char zBuf[500]; | |
| 949 sqlite3StrAccumInit(&acc, zBuf, sizeof(zBuf), 0); | |
| 950 acc.useMalloc = 0; | |
| 951 va_start(ap,zFormat); | |
| 952 sqlite3VXPrintf(&acc, 0, zFormat, ap); | |
| 953 va_end(ap); | |
| 954 sqlite3StrAccumFinish(&acc); | |
| 955 fprintf(stdout,"%s", zBuf); | |
| 956 fflush(stdout); | |
| 957 } | |
| 958 #endif | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 3108030:
Move bundled copy of sqlite one level deeper to better separate it... (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/