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Make port snprintf.c finally thread-safe.

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This commit is contained in:
Bruce Momjian 2005-03-02 00:02:13 +00:00
parent 87aafa1600
commit 9989e90490
1 changed files with 53 additions and 42 deletions
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95
src/port/snprintf.c
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@ -66,12 +66,12 @@
* causing nasty effects.
**************************************************************/
/*static char _id[] = "$PostgreSQL: pgsql/src/port/snprintf.c,v 1.9 2005/03/01 05:47:28 momjian Exp $";*/
/*static char _id[] = "$PostgreSQL: pgsql/src/port/snprintf.c,v 1.10 2005/03/02 00:02:13 momjian Exp $";*/
int snprintf(char *str, size_t count, const char *fmt,...);
int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
int printf(const char *format, ...);
static void dopr(char *buffer, const char *format, va_list args, char *end);
static void dopr(char *buffer, const char *format, va_list args, char *end);
int
printf(const char *fmt,...)
@ -119,13 +119,14 @@ vsnprintf(char *str, size_t count, const char *fmt, va_list args)
* dopr(): poor man's version of doprintf
*/
static void fmtstr(char *value, int ljust, int len, int zpad, int maxwidth, char *end);
static void fmtnum(int64 value, int base, int dosign, int ljust, int len, int zpad, char *end);
static void fmtfloat(double value, char type, int ljust, int len, int precision, int pointflag, char *end);
static void dostr(char *str, int cut, char *end);
static void dopr_outch(int c, char *end);
static char *output;
static void fmtstr(char *value, int ljust, int len, int zpad, int maxwidth,
char *end, char **output);
static void fmtnum(int64 value, int base, int dosign, int ljust, int len,
int zpad, char *end, char **output);
static void fmtfloat(double value, char type, int ljust, int len,
int precision, int pointflag, char *end, char **output);
static void dostr(char *str, int cut, char *end, char **output);
static void dopr_outch(int c, char *end, char **output);
#define FMTSTR 1
#define FMTNUM 2
@ -152,7 +153,12 @@ dopr(char *buffer, const char *format, va_list args, char *end)
int fmtpos = 1;
int realpos = 0;
int position;
static struct{
char *output;
/* In thread mode this structure is too large. */
#ifndef ENABLE_THREAD_SAFETY
static
#endif
struct{
const char* fmtbegin;
const char* fmtend;
void* value;
@ -235,7 +241,7 @@ dopr(char *buffer, const char *format, va_list args, char *end)
goto nextch;
case 'u':
case 'U':
/* fmtnum(value,base,dosign,ljust,len,zpad) */
/* fmtnum(value,base,dosign,ljust,len,zpad,&output) */
if (longflag)
{
if (longlongflag)
@ -259,7 +265,7 @@ dopr(char *buffer, const char *format, va_list args, char *end)
break;
case 'o':
case 'O':
/* fmtnum(value,base,dosign,ljust,len,zpad) */
/* fmtnum(value,base,dosign,ljust,len,zpad,&output) */
if (longflag)
{
if (longlongflag)
@ -286,7 +292,9 @@ dopr(char *buffer, const char *format, va_list args, char *end)
if (longflag)
{
if (longlongflag)
{
value = va_arg(args, int64);
}
else
value = va_arg(args, long);
}
@ -396,11 +404,11 @@ dopr(char *buffer, const char *format, va_list args, char *end)
case '%':
break;
default:
dostr("???????", 0, end);
dostr("???????", 0, end, &output);
}
break;
default:
dopr_outch(ch, end);
dopr_outch(ch, end, &output);
break;
}
}
@ -427,28 +435,28 @@ performpr:
case FMTSTR:
fmtstr(fmtparptr[i]->value, fmtparptr[i]->ljust,
fmtparptr[i]->len, fmtparptr[i]->zpad,
fmtparptr[i]->maxwidth, end);
fmtparptr[i]->maxwidth, end, &output);
break;
case FMTNUM:
fmtnum(fmtparptr[i]->numvalue, fmtparptr[i]->base,
fmtparptr[i]->dosign, fmtparptr[i]->ljust,
fmtparptr[i]->len, fmtparptr[i]->zpad, end);
fmtparptr[i]->len, fmtparptr[i]->zpad, end, &output);
break;
case FMTFLOAT:
fmtfloat(fmtparptr[i]->fvalue, fmtparptr[i]->type,
fmtparptr[i]->ljust, fmtparptr[i]->len,
fmtparptr[i]->precision, fmtparptr[i]->pointflag,
end);
end, &output);
break;
case FMTCHAR:
dopr_outch(fmtparptr[i]->charvalue, end);
dopr_outch(fmtparptr[i]->charvalue, end, &output);
break;
}
format = fmtpar[i].fmtend;
goto nochar;
}
}
dopr_outch(ch, end);
dopr_outch(ch, end, &output);
nochar:
/* nothing */
; /* semicolon required because a goto has to be attached to a statement */
@ -457,7 +465,8 @@ nochar:
}
static void
fmtstr(char *value, int ljust, int len, int zpad, int maxwidth, char *end)
fmtstr(char *value, int ljust, int len, int zpad, int maxwidth, char *end,
char **output)
{
int padlen,
strlen; /* amount to pad */
@ -474,19 +483,20 @@ fmtstr(char *value, int ljust, int len, int zpad, int maxwidth, char *end)
padlen = -padlen;
while (padlen > 0)
{
dopr_outch(' ', end);
dopr_outch(' ', end, output);
--padlen;
}
dostr(value, maxwidth, end);
dostr(value, maxwidth, end, output);
while (padlen < 0)
{
dopr_outch(' ', end);
dopr_outch(' ', end, output);
++padlen;
}
}
static void
fmtnum(int64 value, int base, int dosign, int ljust, int len, int zpad, char *end)
fmtnum(int64 value, int base, int dosign, int ljust, int len, int zpad,
char *end, char **output)
{
int signvalue = 0;
uint64 uvalue;
@ -541,34 +551,35 @@ fmtnum(int64 value, int base, int dosign, int ljust, int len, int zpad, char *en
{
if (signvalue)
{
dopr_outch(signvalue, end);
dopr_outch(signvalue, end, output);
--padlen;
signvalue = 0;
}
while (padlen > 0)
{
dopr_outch(zpad, end);
dopr_outch(zpad, end, output);
--padlen;
}
}
while (padlen > 0)
{
dopr_outch(' ', end);
dopr_outch(' ', end, output);
--padlen;
}
if (signvalue)
dopr_outch(signvalue, end);
dopr_outch(signvalue, end, output);
while (place > 0)
dopr_outch(convert[--place], end);
dopr_outch(convert[--place], end, output);
while (padlen < 0)
{
dopr_outch(' ', end);
dopr_outch(' ', end, output);
++padlen;
}
}
static void
fmtfloat(double value, char type, int ljust, int len, int precision, int pointflag, char *end)
fmtfloat(double value, char type, int ljust, int len, int precision,
int pointflag, char *end, char **output)
{
char fmt[32];
char convert[512];
@ -595,43 +606,43 @@ fmtfloat(double value, char type, int ljust, int len, int precision, int pointfl
while (padlen > 0)
{
dopr_outch(' ', end);
dopr_outch(' ', end, output);
--padlen;
}
dostr(convert, 0, end);
dostr(convert, 0, end, output);
while (padlen < 0)
{
dopr_outch(' ', end);
dopr_outch(' ', end, output);
++padlen;
}
}
static void
dostr(char *str, int cut, char *end)
dostr(char *str, int cut, char *end, char **output)
{
if (cut)
{
while (*str && cut-- > 0)
dopr_outch(*str++, end);
dopr_outch(*str++, end, output);
}
else
{
while (*str)
dopr_outch(*str++, end);
dopr_outch(*str++, end, output);
}
}
static void
dopr_outch(int c, char *end)
dopr_outch(int c, char *end, char **output)
{
#ifdef NOT_USED
if (iscntrl((unsigned char) c) && c != '\n' && c != '\t')
{
c = '@' + (c & 0x1F);
if (end == 0 || output < end)
*output++ = '^';
if (end == 0 || *output < end)
*(*output)++ = '^';
}
#endif
if (end == 0 || output < end)
*output++ = c;
if (end == 0 || *output < end)
*(*output)++ = c;
}