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Optimizations to vdbeaux.c and printf.c (CVS 1980)

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FossilOrigin-Name: eabc77c99b3e78b4c620a1736d9acfa6cb1e7b67
This commit is contained in:
drh
2004-09-24 22:32:30 +00:00
parent 59c98a6f2b
commit 76ff3a0e09
5 changed files with 140 additions and 140 deletions
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62
src/printf.c
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@@ -90,8 +90,8 @@ typedef struct et_info { /* Information about each format field */
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 */
etByte charset; /* Offset into aDigits[] of the digits string */
etByte prefix; /* Offset into aPrefix[] of the prefix string */
} et_info;
/*
@@ -105,28 +105,30 @@ typedef struct et_info { /* Information about each format field */
** 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 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', 16, 0, etPOINTER, "0123456789abcdef", "x0" },
{ 'T', 0, 2, etTOKEN, 0, 0 },
{ 'S', 0, 2, etSRCLIST, 0, 0 },
{ 'd', 10, 1, etRADIX, 0, 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, 0, 2 },
{ 'u', 10, 0, etRADIX, 0, 0 },
{ 'x', 16, 0, etRADIX, 16, 1 },
{ 'X', 16, 0, etRADIX, 0, 4 },
{ 'f', 0, 1, etFLOAT, 0, 0 },
{ 'e', 0, 1, etEXP, 30, 0 },
{ 'E', 0, 1, etEXP, 14, 0 },
{ 'g', 0, 1, etGENERIC, 30, 0 },
{ 'G', 0, 1, etGENERIC, 14, 0 },
{ '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]))
@@ -377,9 +379,9 @@ static int vxprintf(
}
bufpt = &buf[etBUFSIZE-1];
{
register char *cset; /* Use registers for speed */
register const char *cset; /* Use registers for speed */
register int base;
cset = infop->charset;
cset = &aDigits[infop->charset];
base = infop->base;
do{ /* Convert to ascii */
*(--bufpt) = cset[longvalue%base];
@@ -392,10 +394,11 @@ static int vxprintf(
}
if( prefix ) *(--bufpt) = prefix; /* Add sign */
if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */
char *pre, x;
pre = infop->prefix;
const char *pre;
char x;
pre = &aPrefix[infop->prefix];
if( *bufpt!=pre[0] ){
for(pre=infop->prefix; (x=(*pre))!=0; pre++) *(--bufpt) = x;
for(; (x=(*pre))!=0; pre++) *(--bufpt) = x;
}
}
length = &buf[etBUFSIZE-1]-bufpt;
@@ -493,7 +496,7 @@ static int vxprintf(
}
bufpt++; /* point to next free slot */
if( exp || flag_exp ){
*(bufpt++) = infop->charset[0];
*(bufpt++) = aDigits[infop->charset];
if( exp<0 ){ *(bufpt++) = '-'; exp = -exp; } /* sign of exp */
else { *(bufpt++) = '+'; }
if( exp>=100 ){
@@ -809,6 +812,7 @@ char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){
** 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);