1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/extensions/sqlite/sqlite-source/printf.c Sun Mar 30 07:00:22 2008 +0000
1.3 @@ -0,0 +1,907 @@
1.4 +/*
1.5 +** The "printf" code that follows dates from the 1980's. It is in
1.6 +** the public domain. The original comments are included here for
1.7 +** completeness. They are very out-of-date but might be useful as
1.8 +** an historical reference. Most of the "enhancements" have been backed
1.9 +** out so that the functionality is now the same as standard printf().
1.10 +**
1.11 +**************************************************************************
1.12 +**
1.13 +** The following modules is an enhanced replacement for the "printf" subroutines
1.14 +** found in the standard C library. The following enhancements are
1.15 +** supported:
1.16 +**
1.17 +** + Additional functions. The standard set of "printf" functions
1.18 +** includes printf, fprintf, sprintf, vprintf, vfprintf, and
1.19 +** vsprintf. This module adds the following:
1.20 +**
1.21 +** * snprintf -- Works like sprintf, but has an extra argument
1.22 +** which is the size of the buffer written to.
1.23 +**
1.24 +** * mprintf -- Similar to sprintf. Writes output to memory
1.25 +** obtained from malloc.
1.26 +**
1.27 +** * xprintf -- Calls a function to dispose of output.
1.28 +**
1.29 +** * nprintf -- No output, but returns the number of characters
1.30 +** that would have been output by printf.
1.31 +**
1.32 +** * A v- version (ex: vsnprintf) of every function is also
1.33 +** supplied.
1.34 +**
1.35 +** + A few extensions to the formatting notation are supported:
1.36 +**
1.37 +** * The "=" flag (similar to "-") causes the output to be
1.38 +** be centered in the appropriately sized field.
1.39 +**
1.40 +** * The %b field outputs an integer in binary notation.
1.41 +**
1.42 +** * The %c field now accepts a precision. The character output
1.43 +** is repeated by the number of times the precision specifies.
1.44 +**
1.45 +** * The %' field works like %c, but takes as its character the
1.46 +** next character of the format string, instead of the next
1.47 +** argument. For example, printf("%.78'-") prints 78 minus
1.48 +** signs, the same as printf("%.78c",'-').
1.49 +**
1.50 +** + When compiled using GCC on a SPARC, this version of printf is
1.51 +** faster than the library printf for SUN OS 4.1.
1.52 +**
1.53 +** + All functions are fully reentrant.
1.54 +**
1.55 +*/
1.56 +#include "sqliteInt.h"
1.57 +#include <math.h>
1.58 +
1.59 +/*
1.60 +** Conversion types fall into various categories as defined by the
1.61 +** following enumeration.
1.62 +*/
1.63 +#define etRADIX 1 /* Integer types. %d, %x, %o, and so forth */
1.64 +#define etFLOAT 2 /* Floating point. %f */
1.65 +#define etEXP 3 /* Exponentional notation. %e and %E */
1.66 +#define etGENERIC 4 /* Floating or exponential, depending on exponent. %g */
1.67 +#define etSIZE 5 /* Return number of characters processed so far. %n */
1.68 +#define etSTRING 6 /* Strings. %s */
1.69 +#define etDYNSTRING 7 /* Dynamically allocated strings. %z */
1.70 +#define etPERCENT 8 /* Percent symbol. %% */
1.71 +#define etCHARX 9 /* Characters. %c */
1.72 +/* The rest are extensions, not normally found in printf() */
1.73 +#define etCHARLIT 10 /* Literal characters. %' */
1.74 +#define etSQLESCAPE 11 /* Strings with '\'' doubled. %q */
1.75 +#define etSQLESCAPE2 12 /* Strings with '\'' doubled and enclosed in '',
1.76 + NULL pointers replaced by SQL NULL. %Q */
1.77 +#define etTOKEN 13 /* a pointer to a Token structure */
1.78 +#define etSRCLIST 14 /* a pointer to a SrcList */
1.79 +#define etPOINTER 15 /* The %p conversion */
1.80 +#define etSQLESCAPE3 16 /* %w -> Strings with '\"' doubled */
1.81 +
1.82 +
1.83 +/*
1.84 +** An "etByte" is an 8-bit unsigned value.
1.85 +*/
1.86 +typedef unsigned char etByte;
1.87 +
1.88 +/*
1.89 +** Each builtin conversion character (ex: the 'd' in "%d") is described
1.90 +** by an instance of the following structure
1.91 +*/
1.92 +typedef struct et_info { /* Information about each format field */
1.93 + char fmttype; /* The format field code letter */
1.94 + etByte base; /* The base for radix conversion */
1.95 + etByte flags; /* One or more of FLAG_ constants below */
1.96 + etByte type; /* Conversion paradigm */
1.97 + etByte charset; /* Offset into aDigits[] of the digits string */
1.98 + etByte prefix; /* Offset into aPrefix[] of the prefix string */
1.99 +} et_info;
1.100 +
1.101 +/*
1.102 +** Allowed values for et_info.flags
1.103 +*/
1.104 +#define FLAG_SIGNED 1 /* True if the value to convert is signed */
1.105 +#define FLAG_INTERN 2 /* True if for internal use only */
1.106 +#define FLAG_STRING 4 /* Allow infinity precision */
1.107 +
1.108 +
1.109 +/*
1.110 +** The following table is searched linearly, so it is good to put the
1.111 +** most frequently used conversion types first.
1.112 +*/
1.113 +static const char aDigits[] = "0123456789ABCDEF0123456789abcdef";
1.114 +static const char aPrefix[] = "-x0\000X0";
1.115 +static const et_info fmtinfo[] = {
1.116 + { 'd', 10, 1, etRADIX, 0, 0 },
1.117 + { 's', 0, 4, etSTRING, 0, 0 },
1.118 + { 'g', 0, 1, etGENERIC, 30, 0 },
1.119 + { 'z', 0, 4, etDYNSTRING, 0, 0 },
1.120 + { 'q', 0, 4, etSQLESCAPE, 0, 0 },
1.121 + { 'Q', 0, 4, etSQLESCAPE2, 0, 0 },
1.122 + { 'w', 0, 4, etSQLESCAPE3, 0, 0 },
1.123 + { 'c', 0, 0, etCHARX, 0, 0 },
1.124 + { 'o', 8, 0, etRADIX, 0, 2 },
1.125 + { 'u', 10, 0, etRADIX, 0, 0 },
1.126 + { 'x', 16, 0, etRADIX, 16, 1 },
1.127 + { 'X', 16, 0, etRADIX, 0, 4 },
1.128 +#ifndef SQLITE_OMIT_FLOATING_POINT
1.129 + { 'f', 0, 1, etFLOAT, 0, 0 },
1.130 + { 'e', 0, 1, etEXP, 30, 0 },
1.131 + { 'E', 0, 1, etEXP, 14, 0 },
1.132 + { 'G', 0, 1, etGENERIC, 14, 0 },
1.133 +#endif
1.134 + { 'i', 10, 1, etRADIX, 0, 0 },
1.135 + { 'n', 0, 0, etSIZE, 0, 0 },
1.136 + { '%', 0, 0, etPERCENT, 0, 0 },
1.137 + { 'p', 16, 0, etPOINTER, 0, 1 },
1.138 + { 'T', 0, 2, etTOKEN, 0, 0 },
1.139 + { 'S', 0, 2, etSRCLIST, 0, 0 },
1.140 +};
1.141 +#define etNINFO (sizeof(fmtinfo)/sizeof(fmtinfo[0]))
1.142 +
1.143 +/*
1.144 +** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point
1.145 +** conversions will work.
1.146 +*/
1.147 +#ifndef SQLITE_OMIT_FLOATING_POINT
1.148 +/*
1.149 +** "*val" is a double such that 0.1 <= *val < 10.0
1.150 +** Return the ascii code for the leading digit of *val, then
1.151 +** multiply "*val" by 10.0 to renormalize.
1.152 +**
1.153 +** Example:
1.154 +** input: *val = 3.14159
1.155 +** output: *val = 1.4159 function return = '3'
1.156 +**
1.157 +** The counter *cnt is incremented each time. After counter exceeds
1.158 +** 16 (the number of significant digits in a 64-bit float) '0' is
1.159 +** always returned.
1.160 +*/
1.161 +static int et_getdigit(LONGDOUBLE_TYPE *val, int *cnt){
1.162 + int digit;
1.163 + LONGDOUBLE_TYPE d;
1.164 + if( (*cnt)++ >= 16 ) return '0';
1.165 + digit = (int)*val;
1.166 + d = digit;
1.167 + digit += '0';
1.168 + *val = (*val - d)*10.0;
1.169 + return digit;
1.170 +}
1.171 +#endif /* SQLITE_OMIT_FLOATING_POINT */
1.172 +
1.173 +/*
1.174 +** On machines with a small stack size, you can redefine the
1.175 +** SQLITE_PRINT_BUF_SIZE to be less than 350. But beware - for
1.176 +** smaller values some %f conversions may go into an infinite loop.
1.177 +*/
1.178 +#ifndef SQLITE_PRINT_BUF_SIZE
1.179 +# define SQLITE_PRINT_BUF_SIZE 350
1.180 +#endif
1.181 +#define etBUFSIZE SQLITE_PRINT_BUF_SIZE /* Size of the output buffer */
1.182 +
1.183 +/*
1.184 +** The root program. All variations call this core.
1.185 +**
1.186 +** INPUTS:
1.187 +** func This is a pointer to a function taking three arguments
1.188 +** 1. A pointer to anything. Same as the "arg" parameter.
1.189 +** 2. A pointer to the list of characters to be output
1.190 +** (Note, this list is NOT null terminated.)
1.191 +** 3. An integer number of characters to be output.
1.192 +** (Note: This number might be zero.)
1.193 +**
1.194 +** arg This is the pointer to anything which will be passed as the
1.195 +** first argument to "func". Use it for whatever you like.
1.196 +**
1.197 +** fmt This is the format string, as in the usual print.
1.198 +**
1.199 +** ap This is a pointer to a list of arguments. Same as in
1.200 +** vfprint.
1.201 +**
1.202 +** OUTPUTS:
1.203 +** The return value is the total number of characters sent to
1.204 +** the function "func". Returns -1 on a error.
1.205 +**
1.206 +** Note that the order in which automatic variables are declared below
1.207 +** seems to make a big difference in determining how fast this beast
1.208 +** will run.
1.209 +*/
1.210 +static int vxprintf(
1.211 + void (*func)(void*,const char*,int), /* Consumer of text */
1.212 + void *arg, /* First argument to the consumer */
1.213 + int useExtended, /* Allow extended %-conversions */
1.214 + const char *fmt, /* Format string */
1.215 + va_list ap /* arguments */
1.216 +){
1.217 + int c; /* Next character in the format string */
1.218 + char *bufpt; /* Pointer to the conversion buffer */
1.219 + int precision; /* Precision of the current field */
1.220 + int length; /* Length of the field */
1.221 + int idx; /* A general purpose loop counter */
1.222 + int count; /* Total number of characters output */
1.223 + int width; /* Width of the current field */
1.224 + etByte flag_leftjustify; /* True if "-" flag is present */
1.225 + etByte flag_plussign; /* True if "+" flag is present */
1.226 + etByte flag_blanksign; /* True if " " flag is present */
1.227 + etByte flag_alternateform; /* True if "#" flag is present */
1.228 + etByte flag_altform2; /* True if "!" flag is present */
1.229 + etByte flag_zeropad; /* True if field width constant starts with zero */
1.230 + etByte flag_long; /* True if "l" flag is present */
1.231 + etByte flag_longlong; /* True if the "ll" flag is present */
1.232 + etByte done; /* Loop termination flag */
1.233 + sqlite_uint64 longvalue; /* Value for integer types */
1.234 + LONGDOUBLE_TYPE realvalue; /* Value for real types */
1.235 + const et_info *infop; /* Pointer to the appropriate info structure */
1.236 + char buf[etBUFSIZE]; /* Conversion buffer */
1.237 + char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */
1.238 + etByte errorflag = 0; /* True if an error is encountered */
1.239 + etByte xtype; /* Conversion paradigm */
1.240 + char *zExtra; /* Extra memory used for etTCLESCAPE conversions */
1.241 + static const char spaces[] =
1.242 + " ";
1.243 +#define etSPACESIZE (sizeof(spaces)-1)
1.244 +#ifndef SQLITE_OMIT_FLOATING_POINT
1.245 + int exp, e2; /* exponent of real numbers */
1.246 + double rounder; /* Used for rounding floating point values */
1.247 + etByte flag_dp; /* True if decimal point should be shown */
1.248 + etByte flag_rtz; /* True if trailing zeros should be removed */
1.249 + etByte flag_exp; /* True to force display of the exponent */
1.250 + int nsd; /* Number of significant digits returned */
1.251 +#endif
1.252 +
1.253 + func(arg,"",0);
1.254 + count = length = 0;
1.255 + bufpt = 0;
1.256 + for(; (c=(*fmt))!=0; ++fmt){
1.257 + if( c!='%' ){
1.258 + int amt;
1.259 + bufpt = (char *)fmt;
1.260 + amt = 1;
1.261 + while( (c=(*++fmt))!='%' && c!=0 ) amt++;
1.262 + (*func)(arg,bufpt,amt);
1.263 + count += amt;
1.264 + if( c==0 ) break;
1.265 + }
1.266 + if( (c=(*++fmt))==0 ){
1.267 + errorflag = 1;
1.268 + (*func)(arg,"%",1);
1.269 + count++;
1.270 + break;
1.271 + }
1.272 + /* Find out what flags are present */
1.273 + flag_leftjustify = flag_plussign = flag_blanksign =
1.274 + flag_alternateform = flag_altform2 = flag_zeropad = 0;
1.275 + done = 0;
1.276 + do{
1.277 + switch( c ){
1.278 + case '-': flag_leftjustify = 1; break;
1.279 + case '+': flag_plussign = 1; break;
1.280 + case ' ': flag_blanksign = 1; break;
1.281 + case '#': flag_alternateform = 1; break;
1.282 + case '!': flag_altform2 = 1; break;
1.283 + case '0': flag_zeropad = 1; break;
1.284 + default: done = 1; break;
1.285 + }
1.286 + }while( !done && (c=(*++fmt))!=0 );
1.287 + /* Get the field width */
1.288 + width = 0;
1.289 + if( c=='*' ){
1.290 + width = va_arg(ap,int);
1.291 + if( width<0 ){
1.292 + flag_leftjustify = 1;
1.293 + width = -width;
1.294 + }
1.295 + c = *++fmt;
1.296 + }else{
1.297 + while( c>='0' && c<='9' ){
1.298 + width = width*10 + c - '0';
1.299 + c = *++fmt;
1.300 + }
1.301 + }
1.302 + if( width > etBUFSIZE-10 ){
1.303 + width = etBUFSIZE-10;
1.304 + }
1.305 + /* Get the precision */
1.306 + if( c=='.' ){
1.307 + precision = 0;
1.308 + c = *++fmt;
1.309 + if( c=='*' ){
1.310 + precision = va_arg(ap,int);
1.311 + if( precision<0 ) precision = -precision;
1.312 + c = *++fmt;
1.313 + }else{
1.314 + while( c>='0' && c<='9' ){
1.315 + precision = precision*10 + c - '0';
1.316 + c = *++fmt;
1.317 + }
1.318 + }
1.319 + }else{
1.320 + precision = -1;
1.321 + }
1.322 + /* Get the conversion type modifier */
1.323 + if( c=='l' ){
1.324 + flag_long = 1;
1.325 + c = *++fmt;
1.326 + if( c=='l' ){
1.327 + flag_longlong = 1;
1.328 + c = *++fmt;
1.329 + }else{
1.330 + flag_longlong = 0;
1.331 + }
1.332 + }else{
1.333 + flag_long = flag_longlong = 0;
1.334 + }
1.335 + /* Fetch the info entry for the field */
1.336 + infop = 0;
1.337 + for(idx=0; idx<etNINFO; idx++){
1.338 + if( c==fmtinfo[idx].fmttype ){
1.339 + infop = &fmtinfo[idx];
1.340 + if( useExtended || (infop->flags & FLAG_INTERN)==0 ){
1.341 + xtype = infop->type;
1.342 + }else{
1.343 + return -1;
1.344 + }
1.345 + break;
1.346 + }
1.347 + }
1.348 + zExtra = 0;
1.349 + if( infop==0 ){
1.350 + return -1;
1.351 + }
1.352 +
1.353 +
1.354 + /* Limit the precision to prevent overflowing buf[] during conversion */
1.355 + if( precision>etBUFSIZE-40 && (infop->flags & FLAG_STRING)==0 ){
1.356 + precision = etBUFSIZE-40;
1.357 + }
1.358 +
1.359 + /*
1.360 + ** At this point, variables are initialized as follows:
1.361 + **
1.362 + ** flag_alternateform TRUE if a '#' is present.
1.363 + ** flag_altform2 TRUE if a '!' is present.
1.364 + ** flag_plussign TRUE if a '+' is present.
1.365 + ** flag_leftjustify TRUE if a '-' is present or if the
1.366 + ** field width was negative.
1.367 + ** flag_zeropad TRUE if the width began with 0.
1.368 + ** flag_long TRUE if the letter 'l' (ell) prefixed
1.369 + ** the conversion character.
1.370 + ** flag_longlong TRUE if the letter 'll' (ell ell) prefixed
1.371 + ** the conversion character.
1.372 + ** flag_blanksign TRUE if a ' ' is present.
1.373 + ** width The specified field width. This is
1.374 + ** always non-negative. Zero is the default.
1.375 + ** precision The specified precision. The default
1.376 + ** is -1.
1.377 + ** xtype The class of the conversion.
1.378 + ** infop Pointer to the appropriate info struct.
1.379 + */
1.380 + switch( xtype ){
1.381 + case etPOINTER:
1.382 + flag_longlong = sizeof(char*)==sizeof(i64);
1.383 + flag_long = sizeof(char*)==sizeof(long int);
1.384 + /* Fall through into the next case */
1.385 + case etRADIX:
1.386 + if( infop->flags & FLAG_SIGNED ){
1.387 + i64 v;
1.388 + if( flag_longlong ) v = va_arg(ap,i64);
1.389 + else if( flag_long ) v = va_arg(ap,long int);
1.390 + else v = va_arg(ap,int);
1.391 + if( v<0 ){
1.392 + longvalue = -v;
1.393 + prefix = '-';
1.394 + }else{
1.395 + longvalue = v;
1.396 + if( flag_plussign ) prefix = '+';
1.397 + else if( flag_blanksign ) prefix = ' ';
1.398 + else prefix = 0;
1.399 + }
1.400 + }else{
1.401 + if( flag_longlong ) longvalue = va_arg(ap,u64);
1.402 + else if( flag_long ) longvalue = va_arg(ap,unsigned long int);
1.403 + else longvalue = va_arg(ap,unsigned int);
1.404 + prefix = 0;
1.405 + }
1.406 + if( longvalue==0 ) flag_alternateform = 0;
1.407 + if( flag_zeropad && precision<width-(prefix!=0) ){
1.408 + precision = width-(prefix!=0);
1.409 + }
1.410 + bufpt = &buf[etBUFSIZE-1];
1.411 + {
1.412 + register const char *cset; /* Use registers for speed */
1.413 + register int base;
1.414 + cset = &aDigits[infop->charset];
1.415 + base = infop->base;
1.416 + do{ /* Convert to ascii */
1.417 + *(--bufpt) = cset[longvalue%base];
1.418 + longvalue = longvalue/base;
1.419 + }while( longvalue>0 );
1.420 + }
1.421 + length = &buf[etBUFSIZE-1]-bufpt;
1.422 + for(idx=precision-length; idx>0; idx--){
1.423 + *(--bufpt) = '0'; /* Zero pad */
1.424 + }
1.425 + if( prefix ) *(--bufpt) = prefix; /* Add sign */
1.426 + if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */
1.427 + const char *pre;
1.428 + char x;
1.429 + pre = &aPrefix[infop->prefix];
1.430 + if( *bufpt!=pre[0] ){
1.431 + for(; (x=(*pre))!=0; pre++) *(--bufpt) = x;
1.432 + }
1.433 + }
1.434 + length = &buf[etBUFSIZE-1]-bufpt;
1.435 + break;
1.436 + case etFLOAT:
1.437 + case etEXP:
1.438 + case etGENERIC:
1.439 + realvalue = va_arg(ap,double);
1.440 +#ifndef SQLITE_OMIT_FLOATING_POINT
1.441 + if( precision<0 ) precision = 6; /* Set default precision */
1.442 + if( precision>etBUFSIZE/2-10 ) precision = etBUFSIZE/2-10;
1.443 + if( realvalue<0.0 ){
1.444 + realvalue = -realvalue;
1.445 + prefix = '-';
1.446 + }else{
1.447 + if( flag_plussign ) prefix = '+';
1.448 + else if( flag_blanksign ) prefix = ' ';
1.449 + else prefix = 0;
1.450 + }
1.451 + if( xtype==etGENERIC && precision>0 ) precision--;
1.452 +#if 0
1.453 + /* Rounding works like BSD when the constant 0.4999 is used. Wierd! */
1.454 + for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1);
1.455 +#else
1.456 + /* It makes more sense to use 0.5 */
1.457 + for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){}
1.458 +#endif
1.459 + if( xtype==etFLOAT ) realvalue += rounder;
1.460 + /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
1.461 + exp = 0;
1.462 + if( sqlite3_isnan(realvalue) ){
1.463 + bufpt = "NaN";
1.464 + length = 3;
1.465 + break;
1.466 + }
1.467 + if( realvalue>0.0 ){
1.468 + while( realvalue>=1e32 && exp<=350 ){ realvalue *= 1e-32; exp+=32; }
1.469 + while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; }
1.470 + while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; }
1.471 + while( realvalue<1e-8 && exp>=-350 ){ realvalue *= 1e8; exp-=8; }
1.472 + while( realvalue<1.0 && exp>=-350 ){ realvalue *= 10.0; exp--; }
1.473 + if( exp>350 || exp<-350 ){
1.474 + if( prefix=='-' ){
1.475 + bufpt = "-Inf";
1.476 + }else if( prefix=='+' ){
1.477 + bufpt = "+Inf";
1.478 + }else{
1.479 + bufpt = "Inf";
1.480 + }
1.481 + length = strlen(bufpt);
1.482 + break;
1.483 + }
1.484 + }
1.485 + bufpt = buf;
1.486 + /*
1.487 + ** If the field type is etGENERIC, then convert to either etEXP
1.488 + ** or etFLOAT, as appropriate.
1.489 + */
1.490 + flag_exp = xtype==etEXP;
1.491 + if( xtype!=etFLOAT ){
1.492 + realvalue += rounder;
1.493 + if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; }
1.494 + }
1.495 + if( xtype==etGENERIC ){
1.496 + flag_rtz = !flag_alternateform;
1.497 + if( exp<-4 || exp>precision ){
1.498 + xtype = etEXP;
1.499 + }else{
1.500 + precision = precision - exp;
1.501 + xtype = etFLOAT;
1.502 + }
1.503 + }else{
1.504 + flag_rtz = 0;
1.505 + }
1.506 + if( xtype==etEXP ){
1.507 + e2 = 0;
1.508 + }else{
1.509 + e2 = exp;
1.510 + }
1.511 + nsd = 0;
1.512 + flag_dp = (precision>0) | flag_alternateform | flag_altform2;
1.513 + /* The sign in front of the number */
1.514 + if( prefix ){
1.515 + *(bufpt++) = prefix;
1.516 + }
1.517 + /* Digits prior to the decimal point */
1.518 + if( e2<0 ){
1.519 + *(bufpt++) = '0';
1.520 + }else{
1.521 + for(; e2>=0; e2--){
1.522 + *(bufpt++) = et_getdigit(&realvalue,&nsd);
1.523 + }
1.524 + }
1.525 + /* The decimal point */
1.526 + if( flag_dp ){
1.527 + *(bufpt++) = '.';
1.528 + }
1.529 + /* "0" digits after the decimal point but before the first
1.530 + ** significant digit of the number */
1.531 + for(e2++; e2<0 && precision>0; precision--, e2++){
1.532 + *(bufpt++) = '0';
1.533 + }
1.534 + /* Significant digits after the decimal point */
1.535 + while( (precision--)>0 ){
1.536 + *(bufpt++) = et_getdigit(&realvalue,&nsd);
1.537 + }
1.538 + /* Remove trailing zeros and the "." if no digits follow the "." */
1.539 + if( flag_rtz && flag_dp ){
1.540 + while( bufpt[-1]=='0' ) *(--bufpt) = 0;
1.541 + assert( bufpt>buf );
1.542 + if( bufpt[-1]=='.' ){
1.543 + if( flag_altform2 ){
1.544 + *(bufpt++) = '0';
1.545 + }else{
1.546 + *(--bufpt) = 0;
1.547 + }
1.548 + }
1.549 + }
1.550 + /* Add the "eNNN" suffix */
1.551 + if( flag_exp || (xtype==etEXP && exp) ){
1.552 + *(bufpt++) = aDigits[infop->charset];
1.553 + if( exp<0 ){
1.554 + *(bufpt++) = '-'; exp = -exp;
1.555 + }else{
1.556 + *(bufpt++) = '+';
1.557 + }
1.558 + if( exp>=100 ){
1.559 + *(bufpt++) = (exp/100)+'0'; /* 100's digit */
1.560 + exp %= 100;
1.561 + }
1.562 + *(bufpt++) = exp/10+'0'; /* 10's digit */
1.563 + *(bufpt++) = exp%10+'0'; /* 1's digit */
1.564 + }
1.565 + *bufpt = 0;
1.566 +
1.567 + /* The converted number is in buf[] and zero terminated. Output it.
1.568 + ** Note that the number is in the usual order, not reversed as with
1.569 + ** integer conversions. */
1.570 + length = bufpt-buf;
1.571 + bufpt = buf;
1.572 +
1.573 + /* Special case: Add leading zeros if the flag_zeropad flag is
1.574 + ** set and we are not left justified */
1.575 + if( flag_zeropad && !flag_leftjustify && length < width){
1.576 + int i;
1.577 + int nPad = width - length;
1.578 + for(i=width; i>=nPad; i--){
1.579 + bufpt[i] = bufpt[i-nPad];
1.580 + }
1.581 + i = prefix!=0;
1.582 + while( nPad-- ) bufpt[i++] = '0';
1.583 + length = width;
1.584 + }
1.585 +#endif
1.586 + break;
1.587 + case etSIZE:
1.588 + *(va_arg(ap,int*)) = count;
1.589 + length = width = 0;
1.590 + break;
1.591 + case etPERCENT:
1.592 + buf[0] = '%';
1.593 + bufpt = buf;
1.594 + length = 1;
1.595 + break;
1.596 + case etCHARLIT:
1.597 + case etCHARX:
1.598 + c = buf[0] = (xtype==etCHARX ? va_arg(ap,int) : *++fmt);
1.599 + if( precision>=0 ){
1.600 + for(idx=1; idx<precision; idx++) buf[idx] = c;
1.601 + length = precision;
1.602 + }else{
1.603 + length =1;
1.604 + }
1.605 + bufpt = buf;
1.606 + break;
1.607 + case etSTRING:
1.608 + case etDYNSTRING:
1.609 + bufpt = va_arg(ap,char*);
1.610 + if( bufpt==0 ){
1.611 + bufpt = "";
1.612 + }else if( xtype==etDYNSTRING ){
1.613 + zExtra = bufpt;
1.614 + }
1.615 + length = strlen(bufpt);
1.616 + if( precision>=0 && precision<length ) length = precision;
1.617 + break;
1.618 + case etSQLESCAPE:
1.619 + case etSQLESCAPE2:
1.620 + case etSQLESCAPE3: {
1.621 + int i, j, n, ch, isnull;
1.622 + int needQuote;
1.623 + char q = ((xtype==etSQLESCAPE3)?'"':'\''); /* Quote character */
1.624 + char *escarg = va_arg(ap,char*);
1.625 + isnull = escarg==0;
1.626 + if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)");
1.627 + for(i=n=0; (ch=escarg[i])!=0; i++){
1.628 + if( ch==q ) n++;
1.629 + }
1.630 + needQuote = !isnull && xtype==etSQLESCAPE2;
1.631 + n += i + 1 + needQuote*2;
1.632 + if( n>etBUFSIZE ){
1.633 + bufpt = zExtra = sqlite3_malloc( n );
1.634 + if( bufpt==0 ) return -1;
1.635 + }else{
1.636 + bufpt = buf;
1.637 + }
1.638 + j = 0;
1.639 + if( needQuote ) bufpt[j++] = q;
1.640 + for(i=0; (ch=escarg[i])!=0; i++){
1.641 + bufpt[j++] = ch;
1.642 + if( ch==q ) bufpt[j++] = ch;
1.643 + }
1.644 + if( needQuote ) bufpt[j++] = q;
1.645 + bufpt[j] = 0;
1.646 + length = j;
1.647 + /* The precision is ignored on %q and %Q */
1.648 + /* if( precision>=0 && precision<length ) length = precision; */
1.649 + break;
1.650 + }
1.651 + case etTOKEN: {
1.652 + Token *pToken = va_arg(ap, Token*);
1.653 + if( pToken && pToken->z ){
1.654 + (*func)(arg, (char*)pToken->z, pToken->n);
1.655 + }
1.656 + length = width = 0;
1.657 + break;
1.658 + }
1.659 + case etSRCLIST: {
1.660 + SrcList *pSrc = va_arg(ap, SrcList*);
1.661 + int k = va_arg(ap, int);
1.662 + struct SrcList_item *pItem = &pSrc->a[k];
1.663 + assert( k>=0 && k<pSrc->nSrc );
1.664 + if( pItem->zDatabase && pItem->zDatabase[0] ){
1.665 + (*func)(arg, pItem->zDatabase, strlen(pItem->zDatabase));
1.666 + (*func)(arg, ".", 1);
1.667 + }
1.668 + (*func)(arg, pItem->zName, strlen(pItem->zName));
1.669 + length = width = 0;
1.670 + break;
1.671 + }
1.672 + }/* End switch over the format type */
1.673 + /*
1.674 + ** The text of the conversion is pointed to by "bufpt" and is
1.675 + ** "length" characters long. The field width is "width". Do
1.676 + ** the output.
1.677 + */
1.678 + if( !flag_leftjustify ){
1.679 + register int nspace;
1.680 + nspace = width-length;
1.681 + if( nspace>0 ){
1.682 + count += nspace;
1.683 + while( nspace>=etSPACESIZE ){
1.684 + (*func)(arg,spaces,etSPACESIZE);
1.685 + nspace -= etSPACESIZE;
1.686 + }
1.687 + if( nspace>0 ) (*func)(arg,spaces,nspace);
1.688 + }
1.689 + }
1.690 + if( length>0 ){
1.691 + (*func)(arg,bufpt,length);
1.692 + count += length;
1.693 + }
1.694 + if( flag_leftjustify ){
1.695 + register int nspace;
1.696 + nspace = width-length;
1.697 + if( nspace>0 ){
1.698 + count += nspace;
1.699 + while( nspace>=etSPACESIZE ){
1.700 + (*func)(arg,spaces,etSPACESIZE);
1.701 + nspace -= etSPACESIZE;
1.702 + }
1.703 + if( nspace>0 ) (*func)(arg,spaces,nspace);
1.704 + }
1.705 + }
1.706 + if( zExtra ){
1.707 + sqlite3_free(zExtra);
1.708 + }
1.709 + }/* End for loop over the format string */
1.710 + return errorflag ? -1 : count;
1.711 +} /* End of function */
1.712 +
1.713 +
1.714 +/* This structure is used to store state information about the
1.715 +** write to memory that is currently in progress.
1.716 +*/
1.717 +struct sgMprintf {
1.718 + char *zBase; /* A base allocation */
1.719 + char *zText; /* The string collected so far */
1.720 + int nChar; /* Length of the string so far */
1.721 + int nTotal; /* Output size if unconstrained */
1.722 + int nAlloc; /* Amount of space allocated in zText */
1.723 + void *(*xRealloc)(void*,int); /* Function used to realloc memory */
1.724 + int iMallocFailed; /* True if xRealloc() has failed */
1.725 +};
1.726 +
1.727 +/*
1.728 +** This function implements the callback from vxprintf.
1.729 +**
1.730 +** This routine add nNewChar characters of text in zNewText to
1.731 +** the sgMprintf structure pointed to by "arg".
1.732 +*/
1.733 +static void mout(void *arg, const char *zNewText, int nNewChar){
1.734 + struct sgMprintf *pM = (struct sgMprintf*)arg;
1.735 + if( pM->iMallocFailed ) return;
1.736 + pM->nTotal += nNewChar;
1.737 + if( pM->zText ){
1.738 + if( pM->nChar + nNewChar + 1 > pM->nAlloc ){
1.739 + if( pM->xRealloc==0 ){
1.740 + nNewChar = pM->nAlloc - pM->nChar - 1;
1.741 + }else{
1.742 + int nAlloc = pM->nChar + nNewChar*2 + 1;
1.743 + if( pM->zText==pM->zBase ){
1.744 + pM->zText = pM->xRealloc(0, nAlloc);
1.745 + if( pM->zText==0 ){
1.746 + pM->nAlloc = 0;
1.747 + pM->iMallocFailed = 1;
1.748 + return;
1.749 + }else if( pM->nChar ){
1.750 + memcpy(pM->zText, pM->zBase, pM->nChar);
1.751 + }
1.752 + }else{
1.753 + char *zNew;
1.754 + zNew = pM->xRealloc(pM->zText, nAlloc);
1.755 + if( zNew ){
1.756 + pM->zText = zNew;
1.757 + }else{
1.758 + pM->iMallocFailed = 1;
1.759 + pM->xRealloc(pM->zText, 0);
1.760 + pM->zText = 0;
1.761 + pM->nAlloc = 0;
1.762 + return;
1.763 + }
1.764 + }
1.765 + pM->nAlloc = nAlloc;
1.766 + }
1.767 + }
1.768 + if( nNewChar>0 ){
1.769 + memcpy(&pM->zText[pM->nChar], zNewText, nNewChar);
1.770 + pM->nChar += nNewChar;
1.771 + }
1.772 + pM->zText[pM->nChar] = 0;
1.773 + }
1.774 +}
1.775 +
1.776 +/*
1.777 +** This routine is a wrapper around xprintf() that invokes mout() as
1.778 +** the consumer.
1.779 +*/
1.780 +static char *base_vprintf(
1.781 + void *(*xRealloc)(void*, int), /* realloc() function. May be NULL */
1.782 + int useInternal, /* Use internal %-conversions if true */
1.783 + char *zInitBuf, /* Initially write here, before mallocing */
1.784 + int nInitBuf, /* Size of zInitBuf[] */
1.785 + const char *zFormat, /* format string */
1.786 + va_list ap /* arguments */
1.787 +){
1.788 + struct sgMprintf sM;
1.789 + sM.zBase = sM.zText = zInitBuf;
1.790 + sM.nChar = sM.nTotal = 0;
1.791 + sM.nAlloc = nInitBuf;
1.792 + sM.xRealloc = xRealloc;
1.793 + sM.iMallocFailed = 0;
1.794 + vxprintf(mout, &sM, useInternal, zFormat, ap);
1.795 + assert(sM.iMallocFailed==0 || sM.zText==0);
1.796 + if( xRealloc && !sM.iMallocFailed ){
1.797 + if( sM.zText==sM.zBase ){
1.798 + sM.zText = xRealloc(0, sM.nChar+1);
1.799 + if( sM.zText ){
1.800 + memcpy(sM.zText, sM.zBase, sM.nChar+1);
1.801 + }
1.802 + }else if( sM.nAlloc>sM.nChar+10 ){
1.803 + char *zNew;
1.804 + sqlite3MallocBenignFailure(1);
1.805 + zNew = xRealloc(sM.zText, sM.nChar+1);
1.806 + if( zNew ){
1.807 + sM.zText = zNew;
1.808 + }
1.809 + }
1.810 + }
1.811 + return sM.zText;
1.812 +}
1.813 +
1.814 +/*
1.815 +** Realloc that is a real function, not a macro.
1.816 +*/
1.817 +static void *printf_realloc(void *old, int size){
1.818 + return sqlite3_realloc(old, size);
1.819 +}
1.820 +
1.821 +/*
1.822 +** Print into memory obtained from sqliteMalloc(). Use the internal
1.823 +** %-conversion extensions.
1.824 +*/
1.825 +char *sqlite3VMPrintf(sqlite3 *db, const char *zFormat, va_list ap){
1.826 + char *z;
1.827 + char zBase[SQLITE_PRINT_BUF_SIZE];
1.828 + z = base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap);
1.829 + if( z==0 && db!=0 ){
1.830 + db->mallocFailed = 1;
1.831 + }
1.832 + return z;
1.833 +}
1.834 +
1.835 +/*
1.836 +** Print into memory obtained from sqliteMalloc(). Use the internal
1.837 +** %-conversion extensions.
1.838 +*/
1.839 +char *sqlite3MPrintf(sqlite3 *db, const char *zFormat, ...){
1.840 + va_list ap;
1.841 + char *z;
1.842 + char zBase[SQLITE_PRINT_BUF_SIZE];
1.843 + va_start(ap, zFormat);
1.844 + z = base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap);
1.845 + va_end(ap);
1.846 + if( z==0 && db!=0 ){
1.847 + db->mallocFailed = 1;
1.848 + }
1.849 + return z;
1.850 +}
1.851 +
1.852 +/*
1.853 +** Print into memory obtained from sqlite3_malloc(). Omit the internal
1.854 +** %-conversion extensions.
1.855 +*/
1.856 +char *sqlite3_vmprintf(const char *zFormat, va_list ap){
1.857 + char zBase[SQLITE_PRINT_BUF_SIZE];
1.858 + return base_vprintf(sqlite3_realloc, 0, zBase, sizeof(zBase), zFormat, ap);
1.859 +}
1.860 +
1.861 +/*
1.862 +** Print into memory obtained from sqlite3_malloc()(). Omit the internal
1.863 +** %-conversion extensions.
1.864 +*/
1.865 +char *sqlite3_mprintf(const char *zFormat, ...){
1.866 + va_list ap;
1.867 + char *z;
1.868 + va_start(ap, zFormat);
1.869 + z = sqlite3_vmprintf(zFormat, ap);
1.870 + va_end(ap);
1.871 + return z;
1.872 +}
1.873 +
1.874 +/*
1.875 +** sqlite3_snprintf() works like snprintf() except that it ignores the
1.876 +** current locale settings. This is important for SQLite because we
1.877 +** are not able to use a "," as the decimal point in place of "." as
1.878 +** specified by some locales.
1.879 +*/
1.880 +char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){
1.881 + char *z;
1.882 + va_list ap;
1.883 +
1.884 + if( n<=0 ){
1.885 + return zBuf;
1.886 + }
1.887 + zBuf[0] = 0;
1.888 + va_start(ap,zFormat);
1.889 + z = base_vprintf(0, 0, zBuf, n, zFormat, ap);
1.890 + va_end(ap);
1.891 + return z;
1.892 +}
1.893 +
1.894 +#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) || defined(SQLITE_MEMDEBUG)
1.895 +/*
1.896 +** A version of printf() that understands %lld. Used for debugging.
1.897 +** The printf() built into some versions of windows does not understand %lld
1.898 +** and segfaults if you give it a long long int.
1.899 +*/
1.900 +void sqlite3DebugPrintf(const char *zFormat, ...){
1.901 + extern int getpid(void);
1.902 + va_list ap;
1.903 + char zBuf[500];
1.904 + va_start(ap, zFormat);
1.905 + base_vprintf(0, 0, zBuf, sizeof(zBuf), zFormat, ap);
1.906 + va_end(ap);
1.907 + fprintf(stdout,"%s", zBuf);
1.908 + fflush(stdout);
1.909 +}
1.910 +#endif
