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Postgres FD Implementation
Commit 888271ed authored by Bruce Momjian's avatar Bruce Momjian
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Fix snprintf to handle %$ properly by storing and reordering the 

arguments.

Nicolai Tufar
parent 83e87e6f
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Inline Side-by-side
Showing with 103 additions and 97 deletions
src/port/snprintf.c
View file @ 888271ed
......@@ -65,7 +65,7 @@
* causing nasty effects.
**************************************************************/
/*static char _id[] = "$PostgreSQL: pgsql/src/port/snprintf.c,v 1.19 2005/03/12 04:00:56 momjian Exp $";*/
/*static char _id[] = "$PostgreSQL: pgsql/src/port/snprintf.c,v 1.20 2005/03/16 06:00:58 momjian Exp $";*/
int pg_snprintf(char *str, size_t count, const char *fmt,...);
int pg_vsnprintf(char *str, size_t count, const char *fmt, va_list args);
......@@ -151,20 +151,20 @@ static void dopr_outch(int c, char *end, char **output);
#define FMTSTR 1
#define FMTNUM 2
#define FMTFLOAT 3
#define FMTCHAR 4
#define FMTNUM_U 3
#define FMTFLOAT 4
#define FMTCHAR 5
#define FMTWIDTH 6
#define FMTLEN 7
static void
dopr(char *buffer, const char *format, va_list args, char *end)
{
int ch;
int64 value;
double fvalue;
int longlongflag = 0;
int longflag = 0;
int pointflag = 0;
int maxwidth = 0;
char *strvalue;
int ljust;
int len;
int zpad;
......@@ -173,6 +173,7 @@ dopr(char *buffer, const char *format, va_list args, char *end)
const char* fmtbegin;
int fmtpos = 1;
int realpos = 0;
int precision;
int position;
char *output;
int percents = 1;
......@@ -195,6 +196,8 @@ dopr(char *buffer, const char *format, va_list args, char *end)
int pointflag;
char func;
int realpos;
int longflag;
int longlongflag;
} *fmtpar, **fmtparptr;
/* Create enough structures to hold all arguments */
......@@ -229,12 +232,12 @@ dopr(char *buffer, const char *format, va_list args, char *end)
longflag = longlongflag = pointflag = 0;
fmtbegin = format - 1;
realpos = 0;
position = 0;
position = precision = 0;
nextch:
ch = *format++;
switch (ch)
{
case 0:
case '\0':
goto performpr;
case '-':
ljust = 1;
......@@ -251,24 +254,29 @@ dopr(char *buffer, const char *format, va_list args, char *end)
case '7':
case '8':
case '9':
if (pointflag)
/* could also be precision */
maxwidth = maxwidth * 10 + ch - '0';
else
if (!pointflag)
{
len = len * 10 + ch - '0';
position = position * 10 + ch - '0';
}
else
{
maxwidth = maxwidth * 10 + ch - '0';
precision = precision * 10 + ch - '0';
}
goto nextch;
case '$':
realpos = position;
len = 0;
goto nextch;
case '*':
if (pointflag)
maxwidth = va_arg(args, int);
MemSet(&fmtpar[fmtpos], 0, sizeof(fmtpar[fmtpos]));
if (!pointflag)
fmtpar[fmtpos].func = FMTLEN;
else
len = va_arg(args, int);
fmtpar[fmtpos].func = FMTWIDTH;
fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
fmtpos++;
goto nextch;
case '.':
pointflag = 1;
......@@ -301,68 +309,40 @@ dopr(char *buffer, const char *format, va_list args, char *end)
#endif
case 'u':
case 'U':
/* fmtnum(value,base,dosign,ljust,len,zpad,&output) */
if (longflag)
{
if (longlongflag)
value = va_arg(args, uint64);
else
value = va_arg(args, unsigned long);
}
else
value = va_arg(args, unsigned int);
fmtpar[fmtpos].longflag = longflag;
fmtpar[fmtpos].longlongflag = longlongflag;
fmtpar[fmtpos].fmtbegin = fmtbegin;
fmtpar[fmtpos].fmtend = format;
fmtpar[fmtpos].numvalue = value;
fmtpar[fmtpos].base = 10;
fmtpar[fmtpos].dosign = 0;
fmtpar[fmtpos].ljust = ljust;
fmtpar[fmtpos].len = len;
fmtpar[fmtpos].zpad = zpad;
fmtpar[fmtpos].func = FMTNUM;
fmtpar[fmtpos].func = FMTNUM_U;
fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
fmtpos++;
break;
case 'o':
case 'O':
/* fmtnum(value,base,dosign,ljust,len,zpad,&output) */
if (longflag)
{
if (longlongflag)
value = va_arg(args, uint64);
else
value = va_arg(args, unsigned long);
}
else
value = va_arg(args, unsigned int);
fmtpar[fmtpos].longflag = longflag;
fmtpar[fmtpos].longlongflag = longlongflag;
fmtpar[fmtpos].fmtbegin = fmtbegin;
fmtpar[fmtpos].fmtend = format;
fmtpar[fmtpos].numvalue = value;
fmtpar[fmtpos].base = 8;
fmtpar[fmtpos].dosign = 0;
fmtpar[fmtpos].ljust = ljust;
fmtpar[fmtpos].len = len;
fmtpar[fmtpos].zpad = zpad;
fmtpar[fmtpos].func = FMTNUM;
fmtpar[fmtpos].func = FMTNUM_U;
fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
fmtpos++;
break;
case 'd':
case 'D':
if (longflag)
{
if (longlongflag)
{
value = va_arg(args, int64);
}
else
value = va_arg(args, long);
}
else
value = va_arg(args, int);
fmtpar[fmtpos].longflag = longflag;
fmtpar[fmtpos].longlongflag = longlongflag;
fmtpar[fmtpos].fmtbegin = fmtbegin;
fmtpar[fmtpos].fmtend = format;
fmtpar[fmtpos].numvalue = value;
fmtpar[fmtpos].base = 10;
fmtpar[fmtpos].dosign = 1;
fmtpar[fmtpos].ljust = ljust;
......@@ -373,72 +353,47 @@ dopr(char *buffer, const char *format, va_list args, char *end)
fmtpos++;
break;
case 'x':
if (longflag)
{
if (longlongflag)
value = va_arg(args, uint64);
else
value = va_arg(args, unsigned long);
}
else
value = va_arg(args, unsigned int);
fmtpar[fmtpos].longflag = longflag;
fmtpar[fmtpos].longlongflag = longlongflag;
fmtpar[fmtpos].fmtbegin = fmtbegin;
fmtpar[fmtpos].fmtend = format;
fmtpar[fmtpos].numvalue = value;
fmtpar[fmtpos].base = 16;
fmtpar[fmtpos].dosign = 0;
fmtpar[fmtpos].ljust = ljust;
fmtpar[fmtpos].len = len;
fmtpar[fmtpos].zpad = zpad;
fmtpar[fmtpos].func = FMTNUM;
fmtpar[fmtpos].func = FMTNUM_U;
fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
fmtpos++;
break;
case 'X':
if (longflag)
{
if (longlongflag)
value = va_arg(args, uint64);
else
value = va_arg(args, unsigned long);
}
else
value = va_arg(args, unsigned int);
fmtpar[fmtpos].longflag = longflag;
fmtpar[fmtpos].longlongflag = longlongflag;
fmtpar[fmtpos].fmtbegin = fmtbegin;
fmtpar[fmtpos].fmtend = format;
fmtpar[fmtpos].numvalue = value;
fmtpar[fmtpos].base = -16;
fmtpar[fmtpos].dosign = 1;
fmtpar[fmtpos].ljust = ljust;
fmtpar[fmtpos].len = len;
fmtpar[fmtpos].zpad = zpad;
fmtpar[fmtpos].func = FMTNUM;
fmtpar[fmtpos].func = FMTNUM_U;
fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
fmtpos++;
break;
case 's':
strvalue = va_arg(args, char *);
if (maxwidth > 0 || !pointflag)
{
if (pointflag && len > maxwidth)
len = maxwidth; /* Adjust padding */
fmtpar[fmtpos].fmtbegin = fmtbegin;
fmtpar[fmtpos].fmtend = format;
fmtpar[fmtpos].value = strvalue;
fmtpar[fmtpos].ljust = ljust;
fmtpar[fmtpos].len = len;
fmtpar[fmtpos].zpad = zpad;
fmtpar[fmtpos].maxwidth = maxwidth;
fmtpar[fmtpos].func = FMTSTR;
fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
fmtpos++;
}
fmtpar[fmtpos].fmtbegin = fmtbegin;
fmtpar[fmtpos].fmtend = format;
fmtpar[fmtpos].ljust = ljust;
fmtpar[fmtpos].len = len;
fmtpar[fmtpos].zpad = zpad;
fmtpar[fmtpos].maxwidth = maxwidth;
fmtpar[fmtpos].func = FMTSTR;
fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
fmtpos++;
break;
case 'c':
ch = va_arg(args, int);
fmtpar[fmtpos].fmtbegin = fmtbegin;
fmtpar[fmtpos].fmtend = format;
fmtpar[fmtpos].charvalue = ch;
fmtpar[fmtpos].func = FMTCHAR;
fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
fmtpos++;
......@@ -448,15 +403,13 @@ dopr(char *buffer, const char *format, va_list args, char *end)
case 'f':
case 'g':
case 'G':
fvalue = va_arg(args, double);
fmtpar[fmtpos].fmtbegin = fmtbegin;
fmtpar[fmtpos].fmtend = format;
fmtpar[fmtpos].fvalue = fvalue;
fmtpar[fmtpos].type = ch;
fmtpar[fmtpos].ljust = ljust;
fmtpar[fmtpos].len = len;
fmtpar[fmtpos].maxwidth = maxwidth;
fmtpar[fmtpos].precision = position;
fmtpar[fmtpos].precision = precision;
fmtpar[fmtpos].pointflag = pointflag;
fmtpar[fmtpos].func = FMTFLOAT;
fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
......@@ -473,22 +426,74 @@ dopr(char *buffer, const char *format, va_list args, char *end)
break;
}
}
performpr:
/* shuffle pointers */
/* reorder pointers */
for(i = 1; i < fmtpos; i++)
fmtparptr[i] = &fmtpar[fmtpar[i].realpos];
/* assign values */
for(i = 1; i < fmtpos; i++){
switch(fmtparptr[i]->func){
case FMTSTR:
fmtparptr[i]->value = va_arg(args, char *);
break;
case FMTNUM:
if (fmtparptr[i]->longflag)
{
if (fmtparptr[i]->longlongflag)
fmtparptr[i]->numvalue = va_arg(args, int64);
else
fmtparptr[i]->numvalue = va_arg(args, long);
}
else
fmtparptr[i]->numvalue = va_arg(args, int);
break;
case FMTNUM_U:
if (fmtparptr[i]->longflag)
{
if (fmtparptr[i]->longlongflag)
fmtparptr[i]->numvalue = va_arg(args, uint64);
else
fmtparptr[i]->numvalue = va_arg(args, unsigned long);
}
else
fmtparptr[i]->numvalue = va_arg(args, unsigned int);
break;
case FMTFLOAT:
fmtparptr[i]->fvalue = va_arg(args, double);
break;
case FMTCHAR:
fmtparptr[i]->charvalue = va_arg(args, int);
break;
case FMTLEN:
if (i + 1 < fmtpos && fmtpar[i + 1].func != FMTWIDTH)
fmtpar[i + 1].len = va_arg(args, int);
/* For "%*.*f", use the second arg */
if (i + 2 < fmtpos && fmtpar[i + 1].func == FMTWIDTH)
fmtpar[i + 2].len = va_arg(args, int);
break;
case FMTWIDTH:
if (i + 1 < fmtpos)
fmtpar[i + 1].maxwidth = fmtpar[i + 1].precision =
va_arg(args, int);
break;
}
}
/* do the output */
output = buffer;
format = format_save;
while ((ch = *format++))
{
for(i = 1; i < fmtpos; i++)
{
if(ch == '%' && *format == '%')
if (ch == '%' && *format == '%')
{
format++;
continue;
}
if(fmtpar[i].fmtbegin == format - 1)
if (fmtpar[i].fmtbegin == format - 1)
{
switch(fmtparptr[i]->func){
case FMTSTR:
......@@ -497,6 +502,7 @@ performpr:
fmtparptr[i]->maxwidth, end, &output);
break;
case FMTNUM:
case FMTNUM_U:
fmtnum(fmtparptr[i]->numvalue, fmtparptr[i]->base,
fmtparptr[i]->dosign, fmtparptr[i]->ljust,
fmtparptr[i]->len, fmtparptr[i]->zpad, end, &output);
......
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