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sourcemod/extensions/sqlite/sqlite-source/printf.c
Scott Ehlert 251cced1f8 Spring Cleaning, Part Ichi (1) 
Various minor things done to project files
Updated sample extension project file and updated makefile to the new unified version (more changes likely on the way)
Updated regex project file and makefile

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%401971
2008-03-30 07:00:22 +00:00

908 lines
30 KiB
C
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/*
** The "printf" code that follows dates from the 1980's. It is in
** the public domain. The original comments are included here for
** completeness. They are very out-of-date but might be useful as
** an historical reference. Most of the "enhancements" have been backed
** out so that the functionality is now the same as standard printf().
**
**************************************************************************
**
** The following modules is an enhanced replacement for the "printf" subroutines
** found in the standard C library. The following enhancements are
** supported:
**
** + Additional functions. The standard set of "printf" functions
** includes printf, fprintf, sprintf, vprintf, vfprintf, and
** vsprintf. This module adds the following:
**
** * snprintf -- Works like sprintf, but has an extra argument
** which is the size of the buffer written to.
**
** * mprintf -- Similar to sprintf. Writes output to memory
** obtained from malloc.
**
** * xprintf -- Calls a function to dispose of output.
**
** * nprintf -- No output, but returns the number of characters
** that would have been output by printf.
**
** * A v- version (ex: vsnprintf) of every function is also
** supplied.
**
** + A few extensions to the formatting notation are supported:
**
** * The "=" flag (similar to "-") causes the output to be
** be centered in the appropriately sized field.
**
** * The %b field outputs an integer in binary notation.
**
** * The %c field now accepts a precision. The character output
** is repeated by the number of times the precision specifies.
**
** * The %' field works like %c, but takes as its character the
** next character of the format string, instead of the next
** argument. For example, printf("%.78'-") prints 78 minus
** signs, the same as printf("%.78c",'-').
**
** + When compiled using GCC on a SPARC, this version of printf is
** faster than the library printf for SUN OS 4.1.
**
** + All functions are fully reentrant.
**
*/
#include "sqliteInt.h"
#include <math.h>
/*
** Conversion types fall into various categories as defined by the
** following enumeration.
*/
#define etRADIX 1 /* Integer types. %d, %x, %o, and so forth */
#define etFLOAT 2 /* Floating point. %f */
#define etEXP 3 /* Exponentional notation. %e and %E */
#define etGENERIC 4 /* Floating or exponential, depending on exponent. %g */
#define etSIZE 5 /* Return number of characters processed so far. %n */
#define etSTRING 6 /* Strings. %s */
#define etDYNSTRING 7 /* Dynamically allocated strings. %z */
#define etPERCENT 8 /* Percent symbol. %% */
#define etCHARX 9 /* Characters. %c */
/* The rest are extensions, not normally found in printf() */
#define etCHARLIT 10 /* Literal characters. %' */
#define etSQLESCAPE 11 /* Strings with '\'' doubled. %q */
#define etSQLESCAPE2 12 /* Strings with '\'' doubled and enclosed in '',
NULL pointers replaced by SQL NULL. %Q */
#define etTOKEN 13 /* a pointer to a Token structure */
#define etSRCLIST 14 /* a pointer to a SrcList */
#define etPOINTER 15 /* The %p conversion */
#define etSQLESCAPE3 16 /* %w -> Strings with '\"' doubled */
/*
** An "etByte" is an 8-bit unsigned value.
*/
typedef unsigned char etByte;
/*
** Each builtin conversion character (ex: the 'd' in "%d") is described
** by an instance of the following structure
*/
typedef struct et_info { /* Information about each format field */
char fmttype; /* The format field code letter */
etByte base; /* The base for radix conversion */
etByte flags; /* One or more of FLAG_ constants below */
etByte type; /* Conversion paradigm */
etByte charset; /* Offset into aDigits[] of the digits string */
etByte prefix; /* Offset into aPrefix[] of the prefix string */
} et_info;
/*
** Allowed values for et_info.flags
*/
#define FLAG_SIGNED 1 /* True if the value to convert is signed */
#define FLAG_INTERN 2 /* True if for internal use only */
#define FLAG_STRING 4 /* Allow infinity precision */
/*
** The following table is searched linearly, so it is good to put the
** most frequently used conversion types first.
*/
static const char aDigits[] = "0123456789ABCDEF0123456789abcdef";
static const char aPrefix[] = "-x0\000X0";
static const et_info fmtinfo[] = {
{ 'd', 10, 1, etRADIX, 0, 0 },
{ 's', 0, 4, etSTRING, 0, 0 },
{ 'g', 0, 1, etGENERIC, 30, 0 },
{ 'z', 0, 4, etDYNSTRING, 0, 0 },
{ 'q', 0, 4, etSQLESCAPE, 0, 0 },
{ 'Q', 0, 4, etSQLESCAPE2, 0, 0 },
{ 'w', 0, 4, etSQLESCAPE3, 0, 0 },
{ 'c', 0, 0, etCHARX, 0, 0 },
{ 'o', 8, 0, etRADIX, 0, 2 },
{ 'u', 10, 0, etRADIX, 0, 0 },
{ 'x', 16, 0, etRADIX, 16, 1 },
{ 'X', 16, 0, etRADIX, 0, 4 },
#ifndef SQLITE_OMIT_FLOATING_POINT
{ 'f', 0, 1, etFLOAT, 0, 0 },
{ 'e', 0, 1, etEXP, 30, 0 },
{ 'E', 0, 1, etEXP, 14, 0 },
{ 'G', 0, 1, etGENERIC, 14, 0 },
#endif
{ 'i', 10, 1, etRADIX, 0, 0 },
{ 'n', 0, 0, etSIZE, 0, 0 },
{ '%', 0, 0, etPERCENT, 0, 0 },
{ 'p', 16, 0, etPOINTER, 0, 1 },
{ 'T', 0, 2, etTOKEN, 0, 0 },
{ 'S', 0, 2, etSRCLIST, 0, 0 },
};
#define etNINFO (sizeof(fmtinfo)/sizeof(fmtinfo[0]))
/*
** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point
** conversions will work.
*/
#ifndef SQLITE_OMIT_FLOATING_POINT
/*
** "*val" is a double such that 0.1 <= *val < 10.0
** Return the ascii code for the leading digit of *val, then
** multiply "*val" by 10.0 to renormalize.
**
** Example:
** input: *val = 3.14159
** output: *val = 1.4159 function return = '3'
**
** The counter *cnt is incremented each time. After counter exceeds
** 16 (the number of significant digits in a 64-bit float) '0' is
** always returned.
*/
static int et_getdigit(LONGDOUBLE_TYPE *val, int *cnt){
int digit;
LONGDOUBLE_TYPE d;
if( (*cnt)++ >= 16 ) return '0';
digit = (int)*val;
d = digit;
digit += '0';
*val = (*val - d)*10.0;
return digit;
}
#endif /* SQLITE_OMIT_FLOATING_POINT */
/*
** On machines with a small stack size, you can redefine the
** SQLITE_PRINT_BUF_SIZE to be less than 350. But beware - for
** smaller values some %f conversions may go into an infinite loop.
*/
#ifndef SQLITE_PRINT_BUF_SIZE
# define SQLITE_PRINT_BUF_SIZE 350
#endif
#define etBUFSIZE SQLITE_PRINT_BUF_SIZE /* Size of the output buffer */
/*
** The root program. All variations call this core.
**
** INPUTS:
** func This is a pointer to a function taking three arguments
** 1. A pointer to anything. Same as the "arg" parameter.
** 2. A pointer to the list of characters to be output
** (Note, this list is NOT null terminated.)
** 3. An integer number of characters to be output.
** (Note: This number might be zero.)
**
** arg This is the pointer to anything which will be passed as the
** first argument to "func". Use it for whatever you like.
**
** fmt This is the format string, as in the usual print.
**
** ap This is a pointer to a list of arguments. Same as in
** vfprint.
**
** OUTPUTS:
** The return value is the total number of characters sent to
** the function "func". Returns -1 on a error.
**
** Note that the order in which automatic variables are declared below
** seems to make a big difference in determining how fast this beast
** will run.
*/
static int vxprintf(
void (*func)(void*,const char*,int), /* Consumer of text */
void *arg, /* First argument to the consumer */
int useExtended, /* Allow extended %-conversions */
const char *fmt, /* Format string */
va_list ap /* arguments */
){
int c; /* Next character in the format string */
char *bufpt; /* Pointer to the conversion buffer */
int precision; /* Precision of the current field */
int length; /* Length of the field */
int idx; /* A general purpose loop counter */
int count; /* Total number of characters output */
int width; /* Width of the current field */
etByte flag_leftjustify; /* True if "-" flag is present */
etByte flag_plussign; /* True if "+" flag is present */
etByte flag_blanksign; /* True if " " flag is present */
etByte flag_alternateform; /* True if "#" flag is present */
etByte flag_altform2; /* True if "!" flag is present */
etByte flag_zeropad; /* True if field width constant starts with zero */
etByte flag_long; /* True if "l" flag is present */
etByte flag_longlong; /* True if the "ll" flag is present */
etByte done; /* Loop termination flag */
sqlite_uint64 longvalue; /* Value for integer types */
LONGDOUBLE_TYPE realvalue; /* Value for real types */
const et_info *infop; /* Pointer to the appropriate info structure */
char buf[etBUFSIZE]; /* Conversion buffer */
char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */
etByte errorflag = 0; /* True if an error is encountered */
etByte xtype; /* Conversion paradigm */
char *zExtra; /* Extra memory used for etTCLESCAPE conversions */
static const char spaces[] =
" ";
#define etSPACESIZE (sizeof(spaces)-1)
#ifndef SQLITE_OMIT_FLOATING_POINT
int exp, e2; /* exponent of real numbers */
double rounder; /* Used for rounding floating point values */
etByte flag_dp; /* True if decimal point should be shown */
etByte flag_rtz; /* True if trailing zeros should be removed */
etByte flag_exp; /* True to force display of the exponent */
int nsd; /* Number of significant digits returned */
#endif
func(arg,"",0);
count = length = 0;
bufpt = 0;
for(; (c=(*fmt))!=0; ++fmt){
if( c!='%' ){
int amt;
bufpt = (char *)fmt;
amt = 1;
while( (c=(*++fmt))!='%' && c!=0 ) amt++;
(*func)(arg,bufpt,amt);
count += amt;
if( c==0 ) break;
}
if( (c=(*++fmt))==0 ){
errorflag = 1;
(*func)(arg,"%",1);
count++;
break;
}
/* Find out what flags are present */
flag_leftjustify = flag_plussign = flag_blanksign =
flag_alternateform = flag_altform2 = flag_zeropad = 0;
done = 0;
do{
switch( c ){
case '-': flag_leftjustify = 1; break;
case '+': flag_plussign = 1; break;
case ' ': flag_blanksign = 1; break;
case '#': flag_alternateform = 1; break;
case '!': flag_altform2 = 1; break;
case '0': flag_zeropad = 1; break;
default: done = 1; break;
}
}while( !done && (c=(*++fmt))!=0 );
/* Get the field width */
width = 0;
if( c=='*' ){
width = va_arg(ap,int);
if( width<0 ){
flag_leftjustify = 1;
width = -width;
}
c = *++fmt;
}else{
while( c>='0' && c<='9' ){
width = width*10 + c - '0';
c = *++fmt;
}
}
if( width > etBUFSIZE-10 ){
width = etBUFSIZE-10;
}
/* Get the precision */
if( c=='.' ){
precision = 0;
c = *++fmt;
if( c=='*' ){
precision = va_arg(ap,int);
if( precision<0 ) precision = -precision;
c = *++fmt;
}else{
while( c>='0' && c<='9' ){
precision = precision*10 + c - '0';
c = *++fmt;
}
}
}else{
precision = -1;
}
/* Get the conversion type modifier */
if( c=='l' ){
flag_long = 1;
c = *++fmt;
if( c=='l' ){
flag_longlong = 1;
c = *++fmt;
}else{
flag_longlong = 0;
}
}else{
flag_long = flag_longlong = 0;
}
/* Fetch the info entry for the field */
infop = 0;
for(idx=0; idx<etNINFO; idx++){
if( c==fmtinfo[idx].fmttype ){
infop = &fmtinfo[idx];
if( useExtended || (infop->flags & FLAG_INTERN)==0 ){
xtype = infop->type;
}else{
return -1;
}
break;
}
}
zExtra = 0;
if( infop==0 ){
return -1;
}
/* Limit the precision to prevent overflowing buf[] during conversion */
if( precision>etBUFSIZE-40 && (infop->flags & FLAG_STRING)==0 ){
precision = etBUFSIZE-40;
}
/*
** At this point, variables are initialized as follows:
**
** flag_alternateform TRUE if a '#' is present.
** flag_altform2 TRUE if a '!' is present.
** flag_plussign TRUE if a '+' is present.
** flag_leftjustify TRUE if a '-' is present or if the
** field width was negative.
** flag_zeropad TRUE if the width began with 0.
** flag_long TRUE if the letter 'l' (ell) prefixed
** the conversion character.
** flag_longlong TRUE if the letter 'll' (ell ell) prefixed
** the conversion character.
** flag_blanksign TRUE if a ' ' is present.
** width The specified field width. This is
** always non-negative. Zero is the default.
** precision The specified precision. The default
** is -1.
** xtype The class of the conversion.
** infop Pointer to the appropriate info struct.
*/
switch( xtype ){
case etPOINTER:
flag_longlong = sizeof(char*)==sizeof(i64);
flag_long = sizeof(char*)==sizeof(long int);
/* Fall through into the next case */
case etRADIX:
if( infop->flags & FLAG_SIGNED ){
i64 v;
if( flag_longlong ) v = va_arg(ap,i64);
else if( flag_long ) v = va_arg(ap,long int);
else v = va_arg(ap,int);
if( v<0 ){
longvalue = -v;
prefix = '-';
}else{
longvalue = v;
if( flag_plussign ) prefix = '+';
else if( flag_blanksign ) prefix = ' ';
else prefix = 0;
}
}else{
if( flag_longlong ) longvalue = va_arg(ap,u64);
else if( flag_long ) longvalue = va_arg(ap,unsigned long int);
else longvalue = va_arg(ap,unsigned int);
prefix = 0;
}
if( longvalue==0 ) flag_alternateform = 0;
if( flag_zeropad && precision<width-(prefix!=0) ){
precision = width-(prefix!=0);
}
bufpt = &buf[etBUFSIZE-1];
{
register const char *cset; /* Use registers for speed */
register int base;
cset = &aDigits[infop->charset];
base = infop->base;
do{ /* Convert to ascii */
*(--bufpt) = cset[longvalue%base];
longvalue = longvalue/base;
}while( longvalue>0 );
}
length = &buf[etBUFSIZE-1]-bufpt;
for(idx=precision-length; idx>0; idx--){
*(--bufpt) = '0'; /* Zero pad */
}
if( prefix ) *(--bufpt) = prefix; /* Add sign */
if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */
const char *pre;
char x;
pre = &aPrefix[infop->prefix];
if( *bufpt!=pre[0] ){
for(; (x=(*pre))!=0; pre++) *(--bufpt) = x;
}
}
length = &buf[etBUFSIZE-1]-bufpt;
break;
case etFLOAT:
case etEXP:
case etGENERIC:
realvalue = va_arg(ap,double);
#ifndef SQLITE_OMIT_FLOATING_POINT
if( precision<0 ) precision = 6; /* Set default precision */
if( precision>etBUFSIZE/2-10 ) precision = etBUFSIZE/2-10;
if( realvalue<0.0 ){
realvalue = -realvalue;
prefix = '-';
}else{
if( flag_plussign ) prefix = '+';
else if( flag_blanksign ) prefix = ' ';
else prefix = 0;
}
if( xtype==etGENERIC && precision>0 ) precision--;
#if 0
/* Rounding works like BSD when the constant 0.4999 is used. Wierd! */
for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1);
#else
/* It makes more sense to use 0.5 */
for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){}
#endif
if( xtype==etFLOAT ) realvalue += rounder;
/* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
exp = 0;
if( sqlite3_isnan(realvalue) ){
bufpt = "NaN";
length = 3;
break;
}
if( realvalue>0.0 ){
while( realvalue>=1e32 && exp<=350 ){ realvalue *= 1e-32; exp+=32; }
while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; }
while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; }
while( realvalue<1e-8 && exp>=-350 ){ realvalue *= 1e8; exp-=8; }
while( realvalue<1.0 && exp>=-350 ){ realvalue *= 10.0; exp--; }
if( exp>350 || exp<-350 ){
if( prefix=='-' ){
bufpt = "-Inf";
}else if( prefix=='+' ){
bufpt = "+Inf";
}else{
bufpt = "Inf";
}
length = strlen(bufpt);
break;
}
}
bufpt = buf;
/*
** If the field type is etGENERIC, then convert to either etEXP
** or etFLOAT, as appropriate.
*/
flag_exp = xtype==etEXP;
if( xtype!=etFLOAT ){
realvalue += rounder;
if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; }
}
if( xtype==etGENERIC ){
flag_rtz = !flag_alternateform;
if( exp<-4 || exp>precision ){
xtype = etEXP;
}else{
precision = precision - exp;
xtype = etFLOAT;
}
}else{
flag_rtz = 0;
}
if( xtype==etEXP ){
e2 = 0;
}else{
e2 = exp;
}
nsd = 0;
flag_dp = (precision>0) | flag_alternateform | flag_altform2;
/* The sign in front of the number */
if( prefix ){
*(bufpt++) = prefix;
}
/* Digits prior to the decimal point */
if( e2<0 ){
*(bufpt++) = '0';
}else{
for(; e2>=0; e2--){
*(bufpt++) = et_getdigit(&realvalue,&nsd);
}
}
/* The decimal point */
if( flag_dp ){
*(bufpt++) = '.';
}
/* "0" digits after the decimal point but before the first
** significant digit of the number */
for(e2++; e2<0 && precision>0; precision--, e2++){
*(bufpt++) = '0';
}
/* Significant digits after the decimal point */
while( (precision--)>0 ){
*(bufpt++) = et_getdigit(&realvalue,&nsd);
}
/* Remove trailing zeros and the "." if no digits follow the "." */
if( flag_rtz && flag_dp ){
while( bufpt[-1]=='0' ) *(--bufpt) = 0;
assert( bufpt>buf );
if( bufpt[-1]=='.' ){
if( flag_altform2 ){
*(bufpt++) = '0';
}else{
*(--bufpt) = 0;
}
}
}
/* Add the "eNNN" suffix */
if( flag_exp || (xtype==etEXP && exp) ){
*(bufpt++) = aDigits[infop->charset];
if( exp<0 ){
*(bufpt++) = '-'; exp = -exp;
}else{
*(bufpt++) = '+';
}
if( exp>=100 ){
*(bufpt++) = (exp/100)+'0'; /* 100's digit */
exp %= 100;
}
*(bufpt++) = exp/10+'0'; /* 10's digit */
*(bufpt++) = exp%10+'0'; /* 1's digit */
}
*bufpt = 0;
/* The converted number is in buf[] and zero terminated. Output it.
** Note that the number is in the usual order, not reversed as with
** integer conversions. */
length = bufpt-buf;
bufpt = buf;
/* Special case: Add leading zeros if the flag_zeropad flag is
** set and we are not left justified */
if( flag_zeropad && !flag_leftjustify && length < width){
int i;
int nPad = width - length;
for(i=width; i>=nPad; i--){
bufpt[i] = bufpt[i-nPad];
}
i = prefix!=0;
while( nPad-- ) bufpt[i++] = '0';
length = width;
}
#endif
break;
case etSIZE:
*(va_arg(ap,int*)) = count;
length = width = 0;
break;
case etPERCENT:
buf[0] = '%';
bufpt = buf;
length = 1;
break;
case etCHARLIT:
case etCHARX:
c = buf[0] = (xtype==etCHARX ? va_arg(ap,int) : *++fmt);
if( precision>=0 ){
for(idx=1; idx<precision; idx++) buf[idx] = c;
length = precision;
}else{
length =1;
}
bufpt = buf;
break;
case etSTRING:
case etDYNSTRING:
bufpt = va_arg(ap,char*);
if( bufpt==0 ){
bufpt = "";
}else if( xtype==etDYNSTRING ){
zExtra = bufpt;
}
length = strlen(bufpt);
if( precision>=0 && precision<length ) length = precision;
break;
case etSQLESCAPE:
case etSQLESCAPE2:
case etSQLESCAPE3: {
int i, j, n, ch, isnull;
int needQuote;
char q = ((xtype==etSQLESCAPE3)?'"':'\''); /* Quote character */
char *escarg = va_arg(ap,char*);
isnull = escarg==0;
if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)");
for(i=n=0; (ch=escarg[i])!=0; i++){
if( ch==q ) n++;
}
needQuote = !isnull && xtype==etSQLESCAPE2;
n += i + 1 + needQuote*2;
if( n>etBUFSIZE ){
bufpt = zExtra = sqlite3_malloc( n );
if( bufpt==0 ) return -1;
}else{
bufpt = buf;
}
j = 0;
if( needQuote ) bufpt[j++] = q;
for(i=0; (ch=escarg[i])!=0; i++){
bufpt[j++] = ch;
if( ch==q ) bufpt[j++] = ch;
}
if( needQuote ) bufpt[j++] = q;
bufpt[j] = 0;
length = j;
/* The precision is ignored on %q and %Q */
/* if( precision>=0 && precision<length ) length = precision; */
break;
}
case etTOKEN: {
Token *pToken = va_arg(ap, Token*);
if( pToken && pToken->z ){
(*func)(arg, (char*)pToken->z, pToken->n);
}
length = width = 0;
break;
}
case etSRCLIST: {
SrcList *pSrc = va_arg(ap, SrcList*);
int k = va_arg(ap, int);
struct SrcList_item *pItem = &pSrc->a[k];
assert( k>=0 && k<pSrc->nSrc );
if( pItem->zDatabase && pItem->zDatabase[0] ){
(*func)(arg, pItem->zDatabase, strlen(pItem->zDatabase));
(*func)(arg, ".", 1);
}
(*func)(arg, pItem->zName, strlen(pItem->zName));
length = width = 0;
break;
}
}/* End switch over the format type */
/*
** The text of the conversion is pointed to by "bufpt" and is
** "length" characters long. The field width is "width". Do
** the output.
*/
if( !flag_leftjustify ){
register int nspace;
nspace = width-length;
if( nspace>0 ){
count += nspace;
while( nspace>=etSPACESIZE ){
(*func)(arg,spaces,etSPACESIZE);
nspace -= etSPACESIZE;
}
if( nspace>0 ) (*func)(arg,spaces,nspace);
}
}
if( length>0 ){
(*func)(arg,bufpt,length);
count += length;
}
if( flag_leftjustify ){
register int nspace;
nspace = width-length;
if( nspace>0 ){
count += nspace;
while( nspace>=etSPACESIZE ){
(*func)(arg,spaces,etSPACESIZE);
nspace -= etSPACESIZE;
}
if( nspace>0 ) (*func)(arg,spaces,nspace);
}
}
if( zExtra ){
sqlite3_free(zExtra);
}
}/* End for loop over the format string */
return errorflag ? -1 : count;
} /* End of function */
/* This structure is used to store state information about the
** write to memory that is currently in progress.
*/
struct sgMprintf {
char *zBase; /* A base allocation */
char *zText; /* The string collected so far */
int nChar; /* Length of the string so far */
int nTotal; /* Output size if unconstrained */
int nAlloc; /* Amount of space allocated in zText */
void *(*xRealloc)(void*,int); /* Function used to realloc memory */
int iMallocFailed; /* True if xRealloc() has failed */
};
/*
** This function implements the callback from vxprintf.
**
** This routine add nNewChar characters of text in zNewText to
** the sgMprintf structure pointed to by "arg".
*/
static void mout(void *arg, const char *zNewText, int nNewChar){
struct sgMprintf *pM = (struct sgMprintf*)arg;
if( pM->iMallocFailed ) return;
pM->nTotal += nNewChar;
if( pM->zText ){
if( pM->nChar + nNewChar + 1 > pM->nAlloc ){
if( pM->xRealloc==0 ){
nNewChar = pM->nAlloc - pM->nChar - 1;
}else{
int nAlloc = pM->nChar + nNewChar*2 + 1;
if( pM->zText==pM->zBase ){
pM->zText = pM->xRealloc(0, nAlloc);
if( pM->zText==0 ){
pM->nAlloc = 0;
pM->iMallocFailed = 1;
return;
}else if( pM->nChar ){
memcpy(pM->zText, pM->zBase, pM->nChar);
}
}else{
char *zNew;
zNew = pM->xRealloc(pM->zText, nAlloc);
if( zNew ){
pM->zText = zNew;
}else{
pM->iMallocFailed = 1;
pM->xRealloc(pM->zText, 0);
pM->zText = 0;
pM->nAlloc = 0;
return;
}
}
pM->nAlloc = nAlloc;
}
}
if( nNewChar>0 ){
memcpy(&pM->zText[pM->nChar], zNewText, nNewChar);
pM->nChar += nNewChar;
}
pM->zText[pM->nChar] = 0;
}
}
/*
** This routine is a wrapper around xprintf() that invokes mout() as
** the consumer.
*/
static char *base_vprintf(
void *(*xRealloc)(void*, int), /* realloc() function. May be NULL */
int useInternal, /* Use internal %-conversions if true */
char *zInitBuf, /* Initially write here, before mallocing */
int nInitBuf, /* Size of zInitBuf[] */
const char *zFormat, /* format string */
va_list ap /* arguments */
){
struct sgMprintf sM;
sM.zBase = sM.zText = zInitBuf;
sM.nChar = sM.nTotal = 0;
sM.nAlloc = nInitBuf;
sM.xRealloc = xRealloc;
sM.iMallocFailed = 0;
vxprintf(mout, &sM, useInternal, zFormat, ap);
assert(sM.iMallocFailed==0 || sM.zText==0);
if( xRealloc && !sM.iMallocFailed ){
if( sM.zText==sM.zBase ){
sM.zText = xRealloc(0, sM.nChar+1);
if( sM.zText ){
memcpy(sM.zText, sM.zBase, sM.nChar+1);
}
}else if( sM.nAlloc>sM.nChar+10 ){
char *zNew;
sqlite3MallocBenignFailure(1);
zNew = xRealloc(sM.zText, sM.nChar+1);
if( zNew ){
sM.zText = zNew;
}
}
}
return sM.zText;
}
/*
** Realloc that is a real function, not a macro.
*/
static void *printf_realloc(void *old, int size){
return sqlite3_realloc(old, size);
}
/*
** Print into memory obtained from sqliteMalloc(). Use the internal
** %-conversion extensions.
*/
char *sqlite3VMPrintf(sqlite3 *db, const char *zFormat, va_list ap){
char *z;
char zBase[SQLITE_PRINT_BUF_SIZE];
z = base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap);
if( z==0 && db!=0 ){
db->mallocFailed = 1;
}
return z;
}
/*
** Print into memory obtained from sqliteMalloc(). Use the internal
** %-conversion extensions.
*/
char *sqlite3MPrintf(sqlite3 *db, const char *zFormat, ...){
va_list ap;
char *z;
char zBase[SQLITE_PRINT_BUF_SIZE];
va_start(ap, zFormat);
z = base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap);
va_end(ap);
if( z==0 && db!=0 ){
db->mallocFailed = 1;
}
return z;
}
/*
** Print into memory obtained from sqlite3_malloc(). Omit the internal
** %-conversion extensions.
*/
char *sqlite3_vmprintf(const char *zFormat, va_list ap){
char zBase[SQLITE_PRINT_BUF_SIZE];
return base_vprintf(sqlite3_realloc, 0, zBase, sizeof(zBase), zFormat, ap);
}
/*
** Print into memory obtained from sqlite3_malloc()(). Omit the internal
** %-conversion extensions.
*/
char *sqlite3_mprintf(const char *zFormat, ...){
va_list ap;
char *z;
va_start(ap, zFormat);
z = sqlite3_vmprintf(zFormat, ap);
va_end(ap);
return z;
}
/*
** sqlite3_snprintf() works like snprintf() except that it ignores the
** current locale settings. This is important for SQLite because we
** are not able to use a "," as the decimal point in place of "." as
** specified by some locales.
*/
char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){
char *z;
va_list ap;
if( n<=0 ){
return zBuf;
}
zBuf[0] = 0;
va_start(ap,zFormat);
z = base_vprintf(0, 0, zBuf, n, zFormat, ap);
va_end(ap);
return z;
}
#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) || defined(SQLITE_MEMDEBUG)
/*
** A version of printf() that understands %lld. Used for debugging.
** The printf() built into some versions of windows does not understand %lld
** and segfaults if you give it a long long int.
*/
void sqlite3DebugPrintf(const char *zFormat, ...){
extern int getpid(void);
va_list ap;
char zBuf[500];
va_start(ap, zFormat);
base_vprintf(0, 0, zBuf, sizeof(zBuf), zFormat, ap);
va_end(ap);
fprintf(stdout,"%s", zBuf);
fflush(stdout);
}
#endif
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