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Attempt to fix the SQLite core so that no floating point operations are used

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anywhere if SQLITE_OMIT_FLOATING_POINT is defined at compile-time.  This
is useful to people who use SQLite on embedded processors that lack
floating point support. (CVS 2749)

FossilOrigin-Name: a0bdb584680ce6400d9e8c57db9d91197cc7b776
This commit is contained in:
drh
2005-10-13 02:09:49 +00:00
parent 54414bb449
commit b37df7b928
8 changed files with 83 additions and 52 deletions
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12
src/printf.c
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@@ -120,10 +120,12 @@ static const et_info fmtinfo[] = {
{ '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 },
@@ -134,10 +136,10 @@ static const et_info fmtinfo[] = {
#define etNINFO (sizeof(fmtinfo)/sizeof(fmtinfo[0]))
/*
** If NOFLOATINGPOINT is defined, then none of the floating point
** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point
** conversions will work.
*/
#ifndef etNOFLOATINGPOINT
#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
@@ -161,7 +163,7 @@ static int et_getdigit(LONGDOUBLE_TYPE *val, int *cnt){
*val = (*val - d)*10.0;
return digit;
}
#endif
#endif /* SQLITE_OMIT_FLOATING_POINT */
/*
** On machines with a small stack size, you can redefine the
@@ -234,7 +236,7 @@ static int vxprintf(
static const char spaces[] =
" ";
#define etSPACESIZE (sizeof(spaces)-1)
#ifndef etNOFLOATINGPOINT
#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 */
@@ -425,7 +427,7 @@ static int vxprintf(
case etEXP:
case etGENERIC:
realvalue = va_arg(ap,double);
#ifndef etNOFLOATINGPOINT
#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 ){