mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-09 08:10:09 +08:00
Fix snprintf to handle %$ properly by storing and reordering the
arguments. Nicolai Tufar
This commit is contained in:
Bruce Momjian
parent
83e87e6f2e
commit
888271ed15
@ -65,7 +65,7 @@
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* causing nasty effects.
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**************************************************************/
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/*static char _id[] = "$PostgreSQL: pgsql/src/port/snprintf.c,v 1.19 2005/03/12 04:00:56 momjian Exp $";*/
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/*static char _id[] = "$PostgreSQL: pgsql/src/port/snprintf.c,v 1.20 2005/03/16 06:00:58 momjian Exp $";*/
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int pg_snprintf(char *str, size_t count, const char *fmt,...);
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int pg_vsnprintf(char *str, size_t count, const char *fmt, va_list args);
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@ -151,20 +151,20 @@ static void dopr_outch(int c, char *end, char **output);
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#define FMTSTR 1
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#define FMTNUM 2
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#define FMTFLOAT 3
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#define FMTCHAR 4
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#define FMTNUM_U 3
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#define FMTFLOAT 4
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#define FMTCHAR 5
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#define FMTWIDTH 6
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#define FMTLEN 7
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static void
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dopr(char *buffer, const char *format, va_list args, char *end)
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{
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int ch;
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int64 value;
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double fvalue;
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int longlongflag = 0;
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int longflag = 0;
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int pointflag = 0;
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int maxwidth = 0;
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char *strvalue;
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int ljust;
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int len;
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int zpad;
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@ -173,6 +173,7 @@ dopr(char *buffer, const char *format, va_list args, char *end)
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const char* fmtbegin;
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int fmtpos = 1;
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int realpos = 0;
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int precision;
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int position;
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char *output;
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int percents = 1;
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@ -195,6 +196,8 @@ dopr(char *buffer, const char *format, va_list args, char *end)
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int pointflag;
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char func;
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int realpos;
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int longflag;
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int longlongflag;
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} *fmtpar, **fmtparptr;
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/* Create enough structures to hold all arguments */
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@ -229,12 +232,12 @@ dopr(char *buffer, const char *format, va_list args, char *end)
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longflag = longlongflag = pointflag = 0;
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fmtbegin = format - 1;
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realpos = 0;
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position = 0;
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position = precision = 0;
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nextch:
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ch = *format++;
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switch (ch)
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{
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case 0:
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case '\0':
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goto performpr;
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case '-':
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ljust = 1;
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@ -251,24 +254,29 @@ dopr(char *buffer, const char *format, va_list args, char *end)
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case '7':
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case '8':
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case '9':
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if (pointflag)
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/* could also be precision */
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maxwidth = maxwidth * 10 + ch - '0';
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else
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if (!pointflag)
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{
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len = len * 10 + ch - '0';
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position = position * 10 + ch - '0';
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}
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else
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{
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maxwidth = maxwidth * 10 + ch - '0';
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precision = precision * 10 + ch - '0';
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}
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goto nextch;
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case '$':
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realpos = position;
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len = 0;
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goto nextch;
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case '*':
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if (pointflag)
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maxwidth = va_arg(args, int);
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MemSet(&fmtpar[fmtpos], 0, sizeof(fmtpar[fmtpos]));
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if (!pointflag)
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fmtpar[fmtpos].func = FMTLEN;
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else
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len = va_arg(args, int);
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fmtpar[fmtpos].func = FMTWIDTH;
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fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
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fmtpos++;
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goto nextch;
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case '.':
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pointflag = 1;
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@ -301,68 +309,40 @@ dopr(char *buffer, const char *format, va_list args, char *end)
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#endif
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case 'u':
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case 'U':
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/* fmtnum(value,base,dosign,ljust,len,zpad,&output) */
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if (longflag)
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{
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if (longlongflag)
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value = va_arg(args, uint64);
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else
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value = va_arg(args, unsigned long);
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}
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else
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value = va_arg(args, unsigned int);
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fmtpar[fmtpos].longflag = longflag;
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fmtpar[fmtpos].longlongflag = longlongflag;
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fmtpar[fmtpos].fmtbegin = fmtbegin;
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fmtpar[fmtpos].fmtend = format;
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fmtpar[fmtpos].numvalue = value;
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fmtpar[fmtpos].base = 10;
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fmtpar[fmtpos].dosign = 0;
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fmtpar[fmtpos].ljust = ljust;
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fmtpar[fmtpos].len = len;
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fmtpar[fmtpos].zpad = zpad;
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fmtpar[fmtpos].func = FMTNUM;
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fmtpar[fmtpos].func = FMTNUM_U;
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fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
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fmtpos++;
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break;
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case 'o':
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case 'O':
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/* fmtnum(value,base,dosign,ljust,len,zpad,&output) */
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if (longflag)
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{
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if (longlongflag)
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value = va_arg(args, uint64);
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else
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value = va_arg(args, unsigned long);
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}
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else
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value = va_arg(args, unsigned int);
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fmtpar[fmtpos].longflag = longflag;
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fmtpar[fmtpos].longlongflag = longlongflag;
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fmtpar[fmtpos].fmtbegin = fmtbegin;
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fmtpar[fmtpos].fmtend = format;
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fmtpar[fmtpos].numvalue = value;
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fmtpar[fmtpos].base = 8;
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fmtpar[fmtpos].dosign = 0;
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fmtpar[fmtpos].ljust = ljust;
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fmtpar[fmtpos].len = len;
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fmtpar[fmtpos].zpad = zpad;
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fmtpar[fmtpos].func = FMTNUM;
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fmtpar[fmtpos].func = FMTNUM_U;
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fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
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fmtpos++;
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break;
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case 'd':
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case 'D':
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if (longflag)
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{
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if (longlongflag)
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{
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value = va_arg(args, int64);
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}
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else
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value = va_arg(args, long);
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}
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else
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value = va_arg(args, int);
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fmtpar[fmtpos].longflag = longflag;
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fmtpar[fmtpos].longlongflag = longlongflag;
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fmtpar[fmtpos].fmtbegin = fmtbegin;
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fmtpar[fmtpos].fmtend = format;
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fmtpar[fmtpos].numvalue = value;
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fmtpar[fmtpos].base = 10;
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fmtpar[fmtpos].dosign = 1;
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fmtpar[fmtpos].ljust = ljust;
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@ -373,58 +353,36 @@ dopr(char *buffer, const char *format, va_list args, char *end)
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fmtpos++;
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break;
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case 'x':
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if (longflag)
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{
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if (longlongflag)
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value = va_arg(args, uint64);
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else
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value = va_arg(args, unsigned long);
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}
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else
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value = va_arg(args, unsigned int);
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fmtpar[fmtpos].longflag = longflag;
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fmtpar[fmtpos].longlongflag = longlongflag;
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fmtpar[fmtpos].fmtbegin = fmtbegin;
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fmtpar[fmtpos].fmtend = format;
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fmtpar[fmtpos].numvalue = value;
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fmtpar[fmtpos].base = 16;
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fmtpar[fmtpos].dosign = 0;
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fmtpar[fmtpos].ljust = ljust;
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fmtpar[fmtpos].len = len;
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fmtpar[fmtpos].zpad = zpad;
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fmtpar[fmtpos].func = FMTNUM;
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fmtpar[fmtpos].func = FMTNUM_U;
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fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
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fmtpos++;
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break;
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case 'X':
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if (longflag)
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{
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if (longlongflag)
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value = va_arg(args, uint64);
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else
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value = va_arg(args, unsigned long);
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}
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else
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value = va_arg(args, unsigned int);
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fmtpar[fmtpos].longflag = longflag;
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fmtpar[fmtpos].longlongflag = longlongflag;
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fmtpar[fmtpos].fmtbegin = fmtbegin;
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fmtpar[fmtpos].fmtend = format;
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fmtpar[fmtpos].numvalue = value;
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fmtpar[fmtpos].base = -16;
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fmtpar[fmtpos].dosign = 1;
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fmtpar[fmtpos].ljust = ljust;
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fmtpar[fmtpos].len = len;
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fmtpar[fmtpos].zpad = zpad;
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fmtpar[fmtpos].func = FMTNUM;
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fmtpar[fmtpos].func = FMTNUM_U;
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fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
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fmtpos++;
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break;
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case 's':
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strvalue = va_arg(args, char *);
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if (maxwidth > 0 || !pointflag)
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{
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if (pointflag && len > maxwidth)
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len = maxwidth; /* Adjust padding */
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fmtpar[fmtpos].fmtbegin = fmtbegin;
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fmtpar[fmtpos].fmtend = format;
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fmtpar[fmtpos].value = strvalue;
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fmtpar[fmtpos].ljust = ljust;
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fmtpar[fmtpos].len = len;
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fmtpar[fmtpos].zpad = zpad;
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@ -432,13 +390,10 @@ dopr(char *buffer, const char *format, va_list args, char *end)
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fmtpar[fmtpos].func = FMTSTR;
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fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
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fmtpos++;
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}
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break;
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case 'c':
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ch = va_arg(args, int);
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fmtpar[fmtpos].fmtbegin = fmtbegin;
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fmtpar[fmtpos].fmtend = format;
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fmtpar[fmtpos].charvalue = ch;
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fmtpar[fmtpos].func = FMTCHAR;
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fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
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fmtpos++;
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@ -448,15 +403,13 @@ dopr(char *buffer, const char *format, va_list args, char *end)
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case 'f':
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case 'g':
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case 'G':
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fvalue = va_arg(args, double);
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fmtpar[fmtpos].fmtbegin = fmtbegin;
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fmtpar[fmtpos].fmtend = format;
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fmtpar[fmtpos].fvalue = fvalue;
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fmtpar[fmtpos].type = ch;
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fmtpar[fmtpos].ljust = ljust;
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fmtpar[fmtpos].len = len;
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fmtpar[fmtpos].maxwidth = maxwidth;
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fmtpar[fmtpos].precision = position;
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fmtpar[fmtpos].precision = precision;
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fmtpar[fmtpos].pointflag = pointflag;
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fmtpar[fmtpos].func = FMTFLOAT;
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fmtpar[fmtpos].realpos = realpos?realpos:fmtpos;
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@ -473,22 +426,74 @@ dopr(char *buffer, const char *format, va_list args, char *end)
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break;
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}
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}
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performpr:
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/* shuffle pointers */
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/* reorder pointers */
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for(i = 1; i < fmtpos; i++)
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fmtparptr[i] = &fmtpar[fmtpar[i].realpos];
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/* assign values */
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for(i = 1; i < fmtpos; i++){
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switch(fmtparptr[i]->func){
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case FMTSTR:
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fmtparptr[i]->value = va_arg(args, char *);
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break;
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case FMTNUM:
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if (fmtparptr[i]->longflag)
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{
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if (fmtparptr[i]->longlongflag)
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fmtparptr[i]->numvalue = va_arg(args, int64);
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else
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fmtparptr[i]->numvalue = va_arg(args, long);
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}
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else
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fmtparptr[i]->numvalue = va_arg(args, int);
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break;
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case FMTNUM_U:
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if (fmtparptr[i]->longflag)
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{
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if (fmtparptr[i]->longlongflag)
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fmtparptr[i]->numvalue = va_arg(args, uint64);
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else
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fmtparptr[i]->numvalue = va_arg(args, unsigned long);
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}
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else
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fmtparptr[i]->numvalue = va_arg(args, unsigned int);
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break;
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case FMTFLOAT:
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fmtparptr[i]->fvalue = va_arg(args, double);
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break;
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case FMTCHAR:
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fmtparptr[i]->charvalue = va_arg(args, int);
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break;
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case FMTLEN:
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if (i + 1 < fmtpos && fmtpar[i + 1].func != FMTWIDTH)
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fmtpar[i + 1].len = va_arg(args, int);
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/* For "%*.*f", use the second arg */
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if (i + 2 < fmtpos && fmtpar[i + 1].func == FMTWIDTH)
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fmtpar[i + 2].len = va_arg(args, int);
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break;
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case FMTWIDTH:
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if (i + 1 < fmtpos)
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fmtpar[i + 1].maxwidth = fmtpar[i + 1].precision =
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va_arg(args, int);
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break;
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}
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}
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/* do the output */
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output = buffer;
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format = format_save;
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while ((ch = *format++))
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{
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for(i = 1; i < fmtpos; i++)
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{
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if(ch == '%' && *format == '%')
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if (ch == '%' && *format == '%')
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{
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format++;
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continue;
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}
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if(fmtpar[i].fmtbegin == format - 1)
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if (fmtpar[i].fmtbegin == format - 1)
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{
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switch(fmtparptr[i]->func){
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case FMTSTR:
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@ -497,6 +502,7 @@ performpr:
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fmtparptr[i]->maxwidth, end, &output);
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break;
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case FMTNUM:
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case FMTNUM_U:
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fmtnum(fmtparptr[i]->numvalue, fmtparptr[i]->base,
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fmtparptr[i]->dosign, fmtparptr[i]->ljust,
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fmtparptr[i]->len, fmtparptr[i]->zpad, end, &output);
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