/*
** 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 They are very out-of-date but might be useful as
** an historical reference.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"
/*
** Undefine COMPATIBILITY to make some slight changes in the way things
** work. I think the changes are an improvement, but they are not
** backwards compatible.
*/
/* #define COMPATIBILITY / * Compatible with SUN OS 4.1 */
/*
** 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 */
#define etERROR 10 /* Used to indicate no such conversion type */
/* The rest are extensions, not normally found in printf() */
#define etCHARLIT 11 /* Literal characters. %' */
#define etSQLESCAPE 12 /* Strings with '\'' doubled. %q */
#define etSQLESCAPE2 13 /* Strings with '\'' doubled and enclosed in '',
NULL pointers replaced by SQL NULL. %Q */
/*
** 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 */
char *charset; /* The character set for conversion */
char *prefix; /* Prefix on non-zero values in alt format */
} 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 */
/*
** The following table is searched linearly, so it is good to put the
** most frequently used conversion types first.
*/
static et_info fmtinfo[] = {
{ 'd', 10, 1, etRADIX, "0123456789", 0 },
{ 's', 0, 0, etSTRING, 0, 0 },
{ 'z', 0, 2, etDYNSTRING, 0, 0 },
{ 'q', 0, 0, etSQLESCAPE, 0, 0 },
{ 'Q', 0, 0, etSQLESCAPE2, 0, 0 },
{ 'c', 0, 0, etCHARX, 0, 0 },
{ 'o', 8, 0, etRADIX, "01234567", "0" },
{ 'u', 10, 0, etRADIX, "0123456789", 0 },
{ 'x', 16, 0, etRADIX, "0123456789abcdef", "x0" },
{ 'X', 16, 0, etRADIX, "0123456789ABCDEF", "X0" },
{ 'f', 0, 1, etFLOAT, 0, 0 },
{ 'e', 0, 1, etEXP, "e", 0 },
{ 'E', 0, 1, etEXP, "E", 0 },
{ 'g', 0, 1, etGENERIC, "e", 0 },
{ 'G', 0, 1, etGENERIC, "E", 0 },
{ 'i', 10, 1, etRADIX, "0123456789", 0 },
{ 'n', 0, 0, etSIZE, 0, 0 },
{ '%', 0, 0, etPERCENT, 0, 0 },
{ 'p', 10, 0, etRADIX, "0123456789", 0 },
};
#define etNINFO (sizeof(fmtinfo)/sizeof(fmtinfo[0]))
/*
** If NOFLOATINGPOINT is defined, then none of the floating point
** conversions will work.
*/
#ifndef etNOFLOATINGPOINT
/*
** "*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
#define etBUFSIZE 1000 /* 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*,char*,int),
void *arg,
const char *fmt,
va_list ap
){
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_zeropad; /* True if field width constant starts with zero */
etByte flag_long; /* True if "l" flag is present */
unsigned long longvalue; /* Value for integer types */
LONGDOUBLE_TYPE realvalue; /* Value for real types */
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 char spaces[] = " "
" ";
#define etSPACESIZE (sizeof(spaces)-1)
#ifndef etNOFLOATINGPOINT
int exp; /* 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
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_zeropad = 0;
do{
switch( c ){
case '-': flag_leftjustify = 1; c = 0; break;
case '+': flag_plussign = 1; c = 0; break;
case ' ': flag_blanksign = 1; c = 0; break;
case '#': flag_alternateform = 1; c = 0; break;
case '0': flag_zeropad = 1; c = 0; break;
default: break;
}
}while( c==0 && (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);
#ifndef etCOMPATIBILITY
/* This is sensible, but SUN OS 4.1 doesn't do it. */
if( precision<0 ) precision = -precision;
#endif
c = *++fmt;
}else{
while( c>='0' && c<='9' ){
precision = precision*10 + c - '0';
c = *++fmt;
}
}
/* Limit the precision to prevent overflowing buf[] during conversion */
if( precision>etBUFSIZE-40 ) precision = etBUFSIZE-40;
}else{
precision = -1;
}
/* Get the conversion type modifier */
if( c=='l' ){
flag_long = 1;
c = *++fmt;
}else{
flag_long = 0;
}
/* Fetch the info entry for the field */
infop = 0;
xtype = etERROR;
for(idx=0; idx<etNINFO; idx++){
if( c==fmtinfo[idx].fmttype ){
infop = &fmtinfo[idx];
xtype = infop->type;
break;
}
}
zExtra = 0;
/*
** At this point, variables are initialized as follows:
**
** flag_alternateform 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_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 etRADIX:
if( flag_long ) longvalue = va_arg(ap,long);
else longvalue = va_arg(ap,int);
#ifdef etCOMPATIBILITY
/* For the format %#x, the value zero is printed "0" not "0x0".
** I think this is stupid. */
if( longvalue==0 ) flag_alternateform = 0;
#else
/* More sensible: turn off the prefix for octal (to prevent "00"),
** but leave the prefix for hex. */
if( longvalue==0 && infop->base==8 ) flag_alternateform = 0;
#endif
if( infop->flags & FLAG_SIGNED ){
if( *(long*)&longvalue<0 ){
longvalue = -*(long*)&longvalue;
prefix = '-';
}else if( flag_plussign ) prefix = '+';
else if( flag_blanksign ) prefix = ' ';
else prefix = 0;
}else prefix = 0;
if( flag_zeropad && precision<width-(prefix!=0) ){
precision = width-(prefix!=0);
}
bufpt = &buf[etBUFSIZE];
{
register char *cset; /* Use registers for speed */
register int base;
cset = infop->charset;
base = infop->base;
do{ /* Convert to ascii */
*(--bufpt) = cset[longvalue%base];
longvalue = longvalue/base;
}while( longvalue>0 );
}
length = &buf[etBUFSIZE]-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" */
char *pre, x;
pre = infop->prefix;
if( *bufpt!=pre[0] ){
for(pre=infop->prefix; (x=(*pre))!=0; pre++) *(--bufpt) = x;
}
}
length = &buf[etBUFSIZE]-bufpt;
break;
case etFLOAT:
case etEXP:
case etGENERIC:
realvalue = va_arg(ap,double);
#ifndef etNOFLOATINGPOINT
if( precision<0 ) precision = 6; /* Set default precision */
if( precision>etBUFSIZE-10 ) precision = etBUFSIZE-10;
if( realvalue<0.0 ){
realvalue = -realvalue;
prefix = '-';
}else{
if( flag_plussign ) prefix = '+';
else if( flag_blanksign ) prefix = ' ';
else prefix = 0;
}
if( infop->type==etGENERIC && precision>0 ) precision--;
rounder = 0.0;
#ifdef COMPATIBILITY
/* 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( infop->type==etFLOAT ) realvalue += rounder;
/* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
exp = 0;
if( realvalue>0.0 ){
int k = 0;
while( realvalue>=1e8 && k++<100 ){ realvalue *= 1e-8; exp+=8; }
while( realvalue>=10.0 && k++<100 ){ realvalue *= 0.1; exp++; }
while( realvalue<1e-8 && k++<100 ){ realvalue *= 1e8; exp-=8; }
while( realvalue<1.0 && k++<100 ){ realvalue *= 10.0; exp--; }
if( k>=100 ){
bufpt = "NaN";
length = 3;
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;
}
/*
** The "exp+precision" test causes output to be of type etEXP if
** the precision is too large to fit in buf[].
*/
nsd = 0;
if( xtype==etFLOAT && exp+precision<etBUFSIZE-30 ){
flag_dp = (precision>0 || flag_alternateform);
if( prefix ) *(bufpt++) = prefix; /* Sign */
if( exp<0 ) *(bufpt++) = '0'; /* Digits before "." */
else for(; exp>=0; exp--) *(bufpt++) = et_getdigit(&realvalue,&nsd);
if( flag_dp ) *(bufpt++) = '.'; /* The decimal point */
for(exp++; exp<0 && precision>0; precision--, exp++){
*(bufpt++) = '0';
}
while( (precision--)>0 ) *(bufpt++) = et_getdigit(&realvalue,&nsd);
*(bufpt--) = 0; /* Null terminate */
if( flag_rtz && flag_dp ){ /* Remove trailing zeros and "." */
while( bufpt>=buf && *bufpt=='0' ) *(bufpt--) = 0;
if( bufpt>=buf && *bufpt=='.' ) *(bufpt--) = 0;
}
bufpt++; /* point to next free slot */
}else{ /* etEXP or etGENERIC */
flag_dp = (precision>0 || flag_alternateform);
if( prefix ) *(bufpt++) = prefix; /* Sign */
*(bufpt++) = et_getdigit(&realvalue,&nsd); /* First digit */
if( flag_dp ) *(bufpt++) = '.'; /* Decimal point */
while( (precision--)>0 ) *(bufpt++) = et_getdigit(&realvalue,&nsd);
bufpt--; /* point to last digit */
if( flag_rtz && flag_dp ){ /* Remove tail zeros */
while( bufpt>=buf && *bufpt=='0' ) *(bufpt--) = 0;
if( bufpt>=buf && *bufpt=='.' ) *(bufpt--) = 0;
}
bufpt++; /* point to next free slot */
if( exp || flag_exp ){
*(bufpt++) = infop->charset[0];
if( exp<0 ){ *(bufpt++) = '-'; exp = -exp; } /* sign of 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 */
}
}
/* 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:
{
int i, j, n, c, isnull;
char *arg = va_arg(ap,char*);
isnull = arg==0;
if( isnull ) arg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)");
for(i=n=0; (c=arg[i])!=0; i++){
if( c=='\'' ) n++;
}
n += i + 1 + ((!isnull && xtype==etSQLESCAPE2) ? 2 : 0);
if( n>etBUFSIZE ){
bufpt = zExtra = sqliteMalloc( n );
if( bufpt==0 ) return -1;
}else{
bufpt = buf;
}
j = 0;
if( !isnull && xtype==etSQLESCAPE2 ) bufpt[j++] = '\'';
for(i=0; (c=arg[i])!=0; i++){
bufpt[j++] = c;
if( c=='\'' ) bufpt[j++] = c;
}
if( !isnull && xtype==etSQLESCAPE2 ) bufpt[j++] = '\'';
bufpt[j] = 0;
length = j;
if( precision>=0 && precision<length ) length = precision;
}
break;
case etERROR:
buf[0] = '%';
buf[1] = c;
errorflag = 0;
idx = 1+(c!=0);
(*func)(arg,"%",idx);
count += idx;
if( c==0 ) fmt--;
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 ){
if( xtype==etDYNSTRING ){
free(zExtra);
}else{
sqliteFree(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 nAlloc; /* Amount of space allocated in zText */
};
/*
** 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, char *zNewText, int nNewChar){
struct sgMprintf *pM = (struct sgMprintf*)arg;
if( pM->nChar + nNewChar + 1 > pM->nAlloc ){
pM->nAlloc = pM->nChar + nNewChar*2 + 1;
if( pM->zText==pM->zBase ){
pM->zText = sqliteMalloc(pM->nAlloc);
if( pM->zText && pM->nChar ) memcpy(pM->zText,pM->zBase,pM->nChar);
}else{
char *z = sqliteRealloc(pM->zText, pM->nAlloc);
if( z==0 ){
sqliteFree(pM->zText);
pM->nChar = 0;
pM->nAlloc = 0;
}
pM->zText = z;
}
}
if( pM->zText ){
memcpy(&pM->zText[pM->nChar], zNewText, nNewChar);
pM->nChar += nNewChar;
pM->zText[pM->nChar] = 0;
}
}
/*
** sqlite_mprintf() works like printf(), but allocations memory to hold the
** resulting string and returns a pointer to the allocated memory. Use
** sqliteFree() to release the memory allocated.
*/
char *sqliteMPrintf(const char *zFormat, ...){
va_list ap;
struct sgMprintf sMprintf;
char zBuf[200];
sMprintf.nChar = 0;
sMprintf.nAlloc = sizeof(zBuf);
sMprintf.zText = zBuf;
sMprintf.zBase = zBuf;
va_start(ap,zFormat);
vxprintf(mout,&sMprintf,zFormat,ap);
va_end(ap);
sMprintf.zText[sMprintf.nChar] = 0;
return sqliteRealloc(sMprintf.zText, sMprintf.nChar+1);
}
/*
** sqlite_mprintf() works like printf(), but allocations memory to hold the
** resulting string and returns a pointer to the allocated memory. Use
** sqliteFree() to release the memory allocated.
*/
char *sqlite_mprintf(const char *zFormat, ...){
va_list ap;
struct sgMprintf sMprintf;
char *zNew;
char zBuf[200];
sMprintf.nChar = 0;
sMprintf.nAlloc = sizeof(zBuf);
sMprintf.zText = zBuf;
sMprintf.zBase = zBuf;
va_start(ap,zFormat);
vxprintf(mout,&sMprintf,zFormat,ap);
va_end(ap);
sMprintf.zText[sMprintf.nChar] = 0;
zNew = malloc( sMprintf.nChar+1 );
if( zNew ) strcpy(zNew,sMprintf.zText);
if( sMprintf.zText!=sMprintf.zBase ){
sqliteFree(sMprintf.zText);
}
return zNew;
}
/* This is the varargs version of sqlite_mprintf.
*/
char *sqlite_vmprintf(const char *zFormat, va_list ap){
struct sgMprintf sMprintf;
char *zNew;
char zBuf[200];
sMprintf.nChar = 0;
sMprintf.zText = zBuf;
sMprintf.nAlloc = sizeof(zBuf);
sMprintf.zBase = zBuf;
vxprintf(mout,&sMprintf,zFormat,ap);
sMprintf.zText[sMprintf.nChar] = 0;
zNew = malloc( sMprintf.nChar+1 );
if( zNew ) strcpy(zNew,sMprintf.zText);
if( sMprintf.zText!=sMprintf.zBase ){
sqliteFree(sMprintf.zText);
}
return zNew;
}
/*
** This function implements the callback from vxprintf.
**
** This routine add nNewChar characters of text in zNewText to
** the sgMprintf structure pointed to by "arg". Unlike mout() above,
** this routine does not allocate new space when the buffer fills.
** It just truncates.
*/
static void sout(void *arg, char *zNewText, int nNewChar){
struct sgMprintf *pM = (struct sgMprintf*)arg;
if( pM->nChar + nNewChar + 1 > pM->nAlloc ){
nNewChar = pM->nAlloc - pM->nChar - 1;
if( nNewChar<=0 ) return;
}
memcpy(&pM->zText[pM->nChar], zNewText, nNewChar);
pM->nChar += nNewChar;
pM->zText[pM->nChar] = 0;
}
/*
** sqlite_sprintf() works like sprintf() 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.
*/
int sqlite_snprintf(int n, char *zBuf, const char *zFormat, ...){
va_list ap;
struct sgMprintf sMprintf;
sMprintf.nChar = 0;
sMprintf.nAlloc = n;
sMprintf.zText = zBuf;
sMprintf.zBase = zBuf;
va_start(ap,zFormat);
vxprintf(sout,&sMprintf,zFormat,ap);
va_end(ap);
return sMprintf.nChar;
}
/*
** The following four routines implement the varargs versions of the
** sqlite_exec() and sqlite_get_table() interfaces. See the sqlite.h
** header files for a more detailed description of how these interfaces
** work.
**
** These routines are all just simple wrappers.
*/
int sqlite_exec_printf(
sqlite *db, /* An open database */
const char *sqlFormat, /* printf-style format string for the SQL */
sqlite_callback xCallback, /* Callback function */
void *pArg, /* 1st argument to callback function */
char **errmsg, /* Error msg written here */
... /* Arguments to the format string. */
){
va_list ap;
int rc;
va_start(ap, errmsg);
rc = sqlite_exec_vprintf(db, sqlFormat, xCallback, pArg, errmsg, ap);
va_end(ap);
return rc;
}
int sqlite_exec_vprintf(
sqlite *db, /* An open database */
const char *sqlFormat, /* printf-style format string for the SQL */
sqlite_callback xCallback, /* Callback function */
void *pArg, /* 1st argument to callback function */
char **errmsg, /* Error msg written here */
va_list ap /* Arguments to the format string. */
){
char *zSql;
int rc;
zSql = sqlite_vmprintf(sqlFormat, ap);
rc = sqlite_exec(db, zSql, xCallback, pArg, errmsg);
free(zSql);
return rc;
}
int sqlite_get_table_printf(
sqlite *db, /* An open database */
const char *sqlFormat, /* printf-style format string for the SQL */
char ***resultp, /* Result written to a char *[] that this points to */
int *nrow, /* Number of result rows written here */
int *ncol, /* Number of result columns written here */
char **errmsg, /* Error msg written here */
... /* Arguments to the format string */
){
va_list ap;
int rc;
va_start(ap, errmsg);
rc = sqlite_get_table_vprintf(db, sqlFormat, resultp, nrow, ncol, errmsg, ap);
va_end(ap);
return rc;
}
int sqlite_get_table_vprintf(
sqlite *db, /* An open database */
const char *sqlFormat, /* printf-style format string for the SQL */
char ***resultp, /* Result written to a char *[] that this points to */
int *nrow, /* Number of result rows written here */
int *ncolumn, /* Number of result columns written here */
char **errmsg, /* Error msg written here */
va_list ap /* Arguments to the format string */
){
char *zSql;
int rc;
zSql = sqlite_vmprintf(sqlFormat, ap);
rc = sqlite_get_table(db, zSql, resultp, nrow, ncolumn, errmsg);
free(zSql);
return rc;
}