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1448 lines (1408 loc) · 47.8 KB
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using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Text;
namespace Community.CsharpSqlite
{
using etByte = System.Boolean;
using i64 = System.Int64;
using u64 = System.UInt64;
using LONGDOUBLE_TYPE = System.Double;
using sqlite_u3264 = System.UInt64;
using va_list = System.Object;
public partial class Sqlite3
{
/*
** 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 They are very out-of-date but might be useful as
** an historical reference.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.
**
*************************************************************************
** Included in SQLite3 port to C#-SQLite; 2008 Noah B Hart
** C#-SQLite is an independent reimplementation of the SQLite software library
**
** SQLITE_SOURCE_ID: 2011-05-19 13:26:54 ed1da510a239ea767a01dc332b667119fa3c908e
**
*************************************************************************
*/
//#include "sqliteInt.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 etSQLESCAPE 10 /* Strings with '\'' doubled. %q */
//#define etSQLESCAPE2 11 /* Strings with '\'' doubled and enclosed in '',
// NULL pointers replaced by SQL NULL. %Q */
//#define etTOKEN 12 /* a pointer to a Token structure */
//#define etSRCLIST 13 /* a pointer to a SrcList */
//#define etPOINTER 14 /* The %p conversion */
//#define etSQLESCAPE3 15 /* %w -> Strings with '\"' doubled */
//#define etORDINAL 16 /* %r -> 1st, 2nd, 3rd, 4th, etc. English only */
//#define etINVALID 0 /* Any unrecognized conversion type */
const int etRADIX = 1; /* Integer types. %d, %x, %o, and so forth */
const int etFLOAT = 2; /* Floating point. %f */
const int etEXP = 3; /* Exponentional notation. %e and %E */
const int etGENERIC = 4; /* Floating or exponential, depending on exponent. %g */
const int etSIZE = 5; /* Return number of characters processed so far. %n */
const int etSTRING = 6; /* Strings. %s */
const int etDYNSTRING = 7; /* Dynamically allocated strings. %z */
const int etPERCENT = 8; /* Percent symbol. %% */
const int etCHARX = 9; /* Characters. %c */
/* The rest are extensions, not normally found in printf() */
const int etSQLESCAPE = 10; /* Strings with '\'' doubled. %q */
const int etSQLESCAPE2 = 11; /* Strings with '\'' doubled and enclosed in '',
NULL pointers replaced by SQL NULL. %Q */
const int etTOKEN = 12; /* a pointer to a Token structure */
const int etSRCLIST = 13; /* a pointer to a SrcList */
const int etPOINTER = 14; /* The %p conversion */
const int etSQLESCAPE3 = 15; /* %w . Strings with '\"' doubled */
const int etORDINAL = 16; /* %r . 1st, 2nd, 3rd, 4th, etc. English only */
const int etINVALID = 0; /* Any unrecognized conversion type */
/*
** 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
*/
public class et_info
{ /* Information about each format field */
public char fmttype; /* The format field code letter */
public byte _base; /* The _base for radix conversion */
public byte flags; /* One or more of FLAG_ constants below */
public byte type; /* Conversion paradigm */
public byte charset; /* Offset into aDigits[] of the digits string */
public byte prefix; /* Offset into aPrefix[] of the prefix string */
/*
* Constructor
*/
public et_info( char fmttype,
byte _base,
byte flags,
byte type,
byte charset,
byte prefix
)
{
this.fmttype = fmttype;
this._base = _base;
this.flags = flags;
this.type = type;
this.charset = charset;
this.prefix = prefix;
}
}
/*
** Allowed values for et_info.flags
*/
const byte FLAG_SIGNED = 1; /* True if the value to convert is signed */
const byte FLAG_INTERN = 2; /* True if for internal use only */
const byte 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 string aDigits = "0123456789ABCDEF0123456789abcdef";
static string aPrefix = "-x0\000X0";
static et_info[] fmtinfo = new et_info[] {
new et_info( 'd', 10, 1, etRADIX, 0, 0 ),
new et_info( 's', 0, 4, etSTRING, 0, 0 ),
new et_info( 'g', 0, 1, etGENERIC, 30, 0 ),
new et_info( 'z', 0, 4, etDYNSTRING, 0, 0 ),
new et_info( 'q', 0, 4, etSQLESCAPE, 0, 0 ),
new et_info( 'Q', 0, 4, etSQLESCAPE2, 0, 0 ),
new et_info( 'w', 0, 4, etSQLESCAPE3, 0, 0 ),
new et_info( 'c', 0, 0, etCHARX, 0, 0 ),
new et_info( 'o', 8, 0, etRADIX, 0, 2 ),
new et_info( 'u', 10, 0, etRADIX, 0, 0 ),
new et_info( 'x', 16, 0, etRADIX, 16, 1 ),
new et_info( 'X', 16, 0, etRADIX, 0, 4 ),
#if !SQLITE_OMIT_FLOATING_POINT
new et_info( 'f', 0, 1, etFLOAT, 0, 0 ),
new et_info( 'e', 0, 1, etEXP, 30, 0 ),
new et_info( 'E', 0, 1, etEXP, 14, 0 ),
new et_info( 'G', 0, 1, etGENERIC, 14, 0 ),
#endif
new et_info( 'i', 10, 1, etRADIX, 0, 0 ),
new et_info( 'n', 0, 0, etSIZE, 0, 0 ),
new et_info( '%', 0, 0, etPERCENT, 0, 0 ),
new et_info( 'p', 16, 0, etPOINTER, 0, 1 ),
/* All the rest have the FLAG_INTERN bit set and are thus for internal
** use only */
new et_info( 'T', 0, 2, etTOKEN, 0, 0 ),
new et_info( 'S', 0, 2, etSRCLIST, 0, 0 ),
new et_info( 'r', 10, 3, etORDINAL, 0, 0 ),
};
/*
** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point
** conversions will work.
*/
#if !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 char et_getdigit( ref LONGDOUBLE_TYPE val, ref 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 (char)digit;
}
#endif // * SQLITE_OMIT_FLOATING_POINT */
/*
** Append N space characters to the given string buffer.
*/
static void appendSpace( StrAccum pAccum, int N )
{
//static const char zSpaces[] = " ";
//while( N>=zSpaces.Length-1 ){
// sqlite3StrAccumAppend(pAccum, zSpaces, zSpaces.Length-1);
// N -= zSpaces.Length-1;
//}
//if( N>0 ){
// sqlite3StrAccumAppend(pAccum, zSpaces, N);
//}
pAccum.zText.AppendFormat( "{0," + N + "}", "" );
}
/*
** On machines with a small stack size, you can redefine the
** SQLITE_PRINT_BUF_SIZE to be less than 350.
*/
#if !SQLITE_PRINT_BUF_SIZE
# if (SQLITE_SMALL_STACK)
const int SQLITE_PRINT_BUF_SIZE = 50;
# else
const int SQLITE_PRINT_BUF_SIZE = 350;
#endif
#endif
const int 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 char[] buf = new char[etBUFSIZE]; /* Conversion buffer */
static void sqlite3VXPrintf(
StrAccum pAccum, /* Accumulate results here */
int useExtended, /* Allow extended %-conversions */
string fmt, /* Format string */
va_list[] ap /* arguments */
)
{
int c; /* Next character in the format string */
int 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 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 */
i64 longvalue;
LONGDOUBLE_TYPE realvalue; /* Value for real types */
et_info infop; /* Pointer to the appropriate info structure */
char[] buf = new char[etBUFSIZE]; /* Conversion buffer */
char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */
byte xtype = 0; /* Conversion paradigm */
// Not used in C# -- string zExtra; /* Extra memory used for etTCLESCAPE conversions */
#if !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
length = 0;
bufpt = 0;
int _fmt = 0; // Work around string pointer
fmt += '\0';
for ( ; _fmt <= fmt.Length && ( c = fmt[_fmt] ) != 0; ++_fmt )
{
if ( c != '%' )
{
int amt;
bufpt = _fmt;
amt = 1;
while ( _fmt < fmt.Length && ( c = ( fmt[++_fmt] ) ) != '%' && c != 0 )
amt++;
sqlite3StrAccumAppend( pAccum, fmt.Substring( bufpt, amt ), amt );
if ( c == 0 )
break;
}
if ( _fmt < fmt.Length && ( c = ( fmt[++_fmt] ) ) == 0 )
{
sqlite3StrAccumAppend( pAccum, "%", 1 );
break;
}
/* Find out what flags are present */
flag_leftjustify = flag_plussign = flag_blanksign =
flag_alternateform = flag_altform2 = flag_zeropad = false;
done = false;
do
{
switch ( c )
{
case '-':
flag_leftjustify = true;
break;
case '+':
flag_plussign = true;
break;
case ' ':
flag_blanksign = true;
break;
case '#':
flag_alternateform = true;
break;
case '!':
flag_altform2 = true;
break;
case '0':
flag_zeropad = true;
break;
default:
done = true;
break;
}
} while ( !done && _fmt < fmt.Length - 1 && ( c = ( fmt[++_fmt] ) ) != 0 );
/* Get the field width */
width = 0;
if ( c == '*' )
{
width = va_arg( ap, (Int32)0 );
if ( width < 0 )
{
flag_leftjustify = true;
width = -width;
}
c = fmt[++_fmt];
}
else
{
while ( c >= '0' && c <= '9' )
{
width = width * 10 + c - '0';
c = fmt[++_fmt];
}
}
if ( width > etBUFSIZE - 10 )
{
width = etBUFSIZE - 12;
}
/* Get the precision */
if ( c == '.' )
{
precision = 0;
c = fmt[++_fmt];
if ( c == '*' )
{
precision = va_arg( ap, (Int32)0 );
if ( precision < 0 )
precision = -precision;
c = fmt[++_fmt];
}
else
{
while ( c >= '0' && c <= '9' )
{
precision = precision * 10 + c - '0';
c = fmt[++_fmt];
}
}
}
else
{
precision = -1;
}
/* Get the conversion type modifier */
if ( c == 'l' )
{
flag_long = true;
c = fmt[++_fmt];
if ( c == 'l' )
{
flag_longlong = true;
c = fmt[++_fmt];
}
else
{
flag_longlong = false;
}
}
else
{
flag_long = flag_longlong = false;
}
/* Fetch the info entry for the field */
infop = fmtinfo[0];
xtype = etINVALID;
for ( idx = 0; idx < ArraySize( fmtinfo ); idx++ )
{
if ( c == fmtinfo[idx].fmttype )
{
infop = fmtinfo[idx];
if ( useExtended != 0 || ( infop.flags & FLAG_INTERN ) == 0 )
{
xtype = infop.type;
}
else
{
return;
}
break;
}
}
//zExtra = null;
/* 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 = true;// char*.Length == sizeof(i64);
flag_long = false;// char*.Length == sizeof(long);
/* Fall through into the next case */
goto case etRADIX;
case etORDINAL:
case etRADIX:
if ( ( infop.flags & FLAG_SIGNED ) != 0 )
{
i64 v;
if ( flag_longlong )
{
v = (Int64)va_arg( ap, (Int64)0 );
}
else if ( flag_long )
{
v = (Int64)va_arg( ap, (Int64)0 );
}
else
{
v = (Int32)va_arg( ap, (Int32)0 );
}
if ( v < 0 )
{
if ( v == SMALLEST_INT64 )
{
longvalue = ( (long)( (u64)1 ) << 63 );
}
else
{
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, (Int64)0 );
}
else if ( flag_long )
{
longvalue = va_arg( ap, (Int64)0 );
}
else
{
longvalue = va_arg( ap, (Int64)0 );
}
prefix = '\0';
}
if ( longvalue == 0 )
flag_alternateform = false;
if ( flag_zeropad && precision < width - ( ( prefix != '\0' ) ? 1 : 0 ) )
{
precision = width - ( ( prefix != '\0' ) ? 1 : 0 );
}
bufpt = buf.Length;//[etBUFSIZE-1];
char[] _bufOrd = null;
if ( xtype == etORDINAL )
{
char[] zOrd = "thstndrd".ToCharArray();
int x = (int)( longvalue % 10 );
if ( x >= 4 || ( longvalue / 10 ) % 10 == 1 )
{
x = 0;
}
_bufOrd = new char[2];
_bufOrd[0] = zOrd[x * 2];
_bufOrd[1] = zOrd[x * 2 + 1];
//bufpt -= 2;
}
{
char[] _buf;
switch ( infop._base )
{
case 16:
_buf = longvalue.ToString( "x" ).ToCharArray();
break;
case 8:
_buf = Convert.ToString( (long)longvalue, 8 ).ToCharArray();
break;
default:
{
if ( flag_zeropad )
_buf = longvalue.ToString( new string( '0', width - ( ( prefix != '\0' ) ? 1 : 0 ) ) ).ToCharArray();
else
_buf = longvalue.ToString().ToCharArray();
}
break;
}
bufpt = buf.Length - _buf.Length - ( _bufOrd == null ? 0 : 2 );
Array.Copy( _buf, 0, buf, bufpt, _buf.Length );
if ( _bufOrd != null )
{
buf[buf.Length - 1] = _bufOrd[1];
buf[buf.Length - 2] = _bufOrd[0];
}
//char* cset; /* Use registers for speed */
//int _base;
//cset = aDigits[infop.charset];
//_base = infop._base;
//do
//{ /* Convert to ascii */
// *(--bufpt) = cset[longvalue % (ulong)_base];
// longvalue = longvalue / (ulong)_base;
//} while (longvalue > 0);
}
length = buf.Length - bufpt;//length = (int)(&buf[etBUFSIZE-1]-bufpt);
for ( idx = precision - length; idx > 0; idx-- )
{
buf[( --bufpt )] = '0'; /* Zero pad */
}
if ( prefix != '\0' )
buf[--bufpt] = prefix; /* Add sign */
if ( flag_alternateform && infop.prefix != 0 )
{ /* Add "0" or "0x" */
int pre;
char x;
pre = infop.prefix;
for ( ; ( x = aPrefix[pre] ) != 0; pre++ )
buf[--bufpt] = x;
}
length = buf.Length - bufpt;//length = (int)(&buf[etBUFSIZE-1]-bufpt);
break;
case etFLOAT:
case etEXP:
case etGENERIC:
realvalue = va_arg( ap, (Double)0 );
#if SQLITE_OMIT_FLOATING_POINT
length = 0;
#else
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 FALSE
/* 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;
double d = 0;
#if WINDOWS_MOBILE
//alxwest: Tryparse doesn't exist on Windows Moble and what will Tryparsing a double do?
if ( Double.IsNaN( realvalue ))
#else
if ( Double.IsNaN( realvalue ) || !( Double.TryParse( Convert.ToString( realvalue ), out d ) ) )//if( sqlite3IsNaN((double)realvalue) )
#endif
{
buf[0] = 'N';
buf[1] = 'a';
buf[2] = 'N';// "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 )
{
realvalue *= 1e8;
exp -= 8;
}
while ( realvalue < 1.0 )
{
realvalue *= 10.0;
exp--;
}
if ( exp > 350 )
{
if ( prefix == '-' )
{
buf[0] = '-';
buf[1] = 'I';
buf[2] = 'n';
buf[3] = 'f';// "-Inf"
bufpt = 4;
}
else if ( prefix == '+' )
{
buf[0] = '+';
buf[1] = 'I';
buf[2] = 'n';
buf[3] = 'f';// "+Inf"
bufpt = 4;
}
else
{
buf[0] = 'I';
buf[1] = 'n';
buf[2] = 'f';// "Inf"
bufpt = 3;
}
length = sqlite3Strlen30( bufpt );// sqlite3Strlen30(bufpt);
bufpt = 0;
break;
}
}
bufpt = 0;
/*
** 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 = false;
}
if ( xtype == etEXP )
{
e2 = 0;
}
else
{
e2 = exp;
}
nsd = 0;
flag_dp = ( precision > 0 ? true : false ) | flag_alternateform | flag_altform2;
/* The sign in front of the number */
if ( prefix != '\0' )
{
buf[bufpt++] = prefix;
}
/* Digits prior to the decimal point */
if ( e2 < 0 )
{
buf[bufpt++] = '0';
}
else
{
for ( ; e2 >= 0; e2-- )
{
buf[bufpt++] = (char)( et_getdigit( ref realvalue, ref nsd ) + '0' ); // *(bufpt++) = et_getdigit(ref realvalue, ref nsd);
}
}
/* The decimal point */
if ( flag_dp )
{
buf[bufpt++] = '.';
}
/* "0" digits after the decimal point but before the first
** significant digit of the number */
for ( e2++; e2 < 0; precision--, e2++ )
{
Debug.Assert( precision > 0 );
buf[bufpt++] = '0';
}
/* Significant digits after the decimal point */
while ( ( precision-- ) > 0 )
{
buf[bufpt++] = (char)( et_getdigit( ref realvalue, ref nsd ) + '0' ); // *(bufpt++) = et_getdigit(&realvalue, nsd);
}
/* Remove trailing zeros and the "." if no digits follow the "." */
if ( flag_rtz && flag_dp )
{
while ( buf[bufpt - 1] == '0' )
buf[--bufpt] = '\0';
Debug.Assert( bufpt > 0 );
if ( buf[bufpt - 1] == '.' )
{
if ( flag_altform2 )
{
buf[( bufpt++ )] = '0';
}
else
{
buf[( --bufpt )] = '0';
}
}
}
/* Add the "eNNN" suffix */
if ( flag_exp || xtype == etEXP )
{
buf[bufpt++] = aDigits[infop.charset];
if ( exp < 0 )
{
buf[bufpt++] = '-';
exp = -exp;
}
else
{
buf[bufpt++] = '+';
}
if ( exp >= 100 )
{
buf[bufpt++] = (char)( exp / 100 + '0' ); /* 100's digit */
exp %= 100;
}
buf[bufpt++] = (char)( exp / 10 + '0' ); /* 10's digit */
buf[bufpt++] = (char)( 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;//length = (int)(bufpt-buf);
bufpt = 0;
/* 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-- )
{
buf[bufpt + i] = buf[bufpt + i - nPad];
}
i = ( prefix != '\0' ? 1 : 0 );
while ( nPad-- != 0 )
buf[( bufpt++ ) + i] = '0';
length = width;
bufpt = 0;
}
#endif //* !defined(SQLITE_OMIT_FLOATING_POINT) */
break;
case etSIZE:
ap[0] = pAccum.nChar; // *(va_arg(ap,int)) = pAccum.nChar;
length = width = 0;
break;
case etPERCENT:
buf[0] = '%';
bufpt = 0;
length = 1;
break;
case etCHARX:
c = va_arg( ap, (Char) 0);
buf[0] = (char)c;
if ( precision >= 0 )
{
for ( idx = 1; idx < precision; idx++ )
buf[idx] = (char)c;
length = precision;
}
else
{
length = 1;
}
bufpt = 0;
break;
case etSTRING:
case etDYNSTRING:
bufpt = 0;//
string bufStr = (string)va_arg( ap, "string" );
if ( bufStr.Length > buf.Length )
buf = new char[bufStr.Length];
bufStr.ToCharArray().CopyTo( buf, 0 );
bufpt = bufStr.Length;
if ( bufpt == 0 )
{
buf[0] = '\0';
}
else if ( xtype == etDYNSTRING )
{
// zExtra = bufpt;
}
if ( precision >= 0 )
{
for ( length = 0; length < precision && length < bufStr.Length && buf[length] != 0; length++ )
{
}
//length += precision;
}
else
{
length = sqlite3Strlen30( bufpt );
}
bufpt = 0;
break;
case etSQLESCAPE:
case etSQLESCAPE2:
case etSQLESCAPE3:
{
int i;
int j;
int k;
int n;
bool isnull;
bool needQuote;
char ch;
char q = ( ( xtype == etSQLESCAPE3 ) ? '"' : '\'' ); /* Quote character */
string escarg = (string)va_arg( ap, "char*" ) + '\0';
isnull = ( escarg == "" || escarg == "NULL\0" );
if ( isnull )
escarg = ( xtype == etSQLESCAPE2 ) ? "NULL\0" : "(NULL)\0";
k = precision;
for ( i = n = 0; k != 0 && ( ch = escarg[i] ) != 0; i++, k-- )
{
if ( ch == q )
n++;
}
needQuote = !isnull && ( xtype == etSQLESCAPE2 );
n += i + 1 + ( needQuote ? 2 : 0 );
if ( n > etBUFSIZE )
{
buf = new char[n];//bufpt = zExtra = sqlite3Malloc(n);
//if ( bufpt == 0 )
//{
// pAccum->mallocFailed = 1;
// return;
//}
bufpt = 0; //Start of Buffer
}
else
{
//bufpt = buf;
bufpt = 0; //Start of Buffer
}
j = 0;
if ( needQuote )
buf[bufpt + j++] = q;
k = i;
for ( i = 0; i < k; i++ )
{
buf[bufpt + j++] = ch = escarg[i];
if ( ch == q )
buf[bufpt + j++] = ch;
}
if ( needQuote )
buf[bufpt + j++] = q;
buf[bufpt + j] = '\0';
length = j;
/* The precision in %q and %Q means how many input characters to
** consume, not the length of the output...
** if( precision>=0 && precision<length ) length = precision; */
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