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-rw-r--r--src/port/snprintf.c470
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diff --git a/src/port/snprintf.c b/src/port/snprintf.c
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+/*
+ * Copyright (c) 1983, 1995, 1996 Eric P. Allman
+ * Copyright (c) 1988, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* might be in either frontend or backend */
+#include "postgres_fe.h"
+
+#include <sys/ioctl.h>
+#include <sys/param.h>
+
+
+/*
+ * We do all internal arithmetic in the widest available integer type,
+ * here called long_long (or ulong_long for unsigned).
+ */
+#ifdef HAVE_LONG_LONG_INT_64
+typedef long long long_long;
+typedef unsigned long long ulong_long;
+
+#else
+typedef long long_long;
+typedef unsigned long ulong_long;
+#endif
+
+/*
+** SNPRINTF, VSNPRINT -- counted versions of printf
+**
+** These versions have been grabbed off the net. They have been
+** cleaned up to compile properly and support for .precision and
+** %lx has been added.
+*/
+
+/**************************************************************
+ * Original:
+ * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
+ * A bombproof version of doprnt (dopr) included.
+ * Sigh. This sort of thing is always nasty do deal with. Note that
+ * the version here does not include floating point. (now it does ... tgl)
+ *
+ * snprintf() is used instead of sprintf() as it does limit checks
+ * for string length. This covers a nasty loophole.
+ *
+ * The other functions are there to prevent NULL pointers from
+ * causing nast effects.
+ **************************************************************/
+
+/*static char _id[] = "$Id: snprintf.c,v 1.1 2002/07/18 04:13:59 momjian Exp $";*/
+static char *end;
+static int SnprfOverflow;
+
+int snprintf(char *str, size_t count, const char *fmt,...);
+int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
+static void dopr(char *buffer, const char *format, va_list args);
+
+int
+snprintf(char *str, size_t count, const char *fmt,...)
+{
+ int len;
+ va_list args;
+
+ va_start(args, fmt);
+ len = vsnprintf(str, count, fmt, args);
+ va_end(args);
+ return len;
+}
+
+
+int
+vsnprintf(char *str, size_t count, const char *fmt, va_list args)
+{
+ str[0] = '\0';
+ end = str + count - 1;
+ SnprfOverflow = 0;
+ dopr(str, fmt, args);
+ if (count > 0)
+ end[0] = '\0';
+ return strlen(str);
+}
+
+/*
+ * dopr(): poor man's version of doprintf
+ */
+
+static void fmtstr(char *value, int ljust, int len, int zpad, int maxwidth);
+static void fmtnum(long_long value, int base, int dosign, int ljust, int len, int zpad);
+static void fmtfloat(double value, char type, int ljust, int len, int precision, int pointflag);
+static void dostr(char *str, int cut);
+static void dopr_outch(int c);
+
+static char *output;
+
+
+static void
+dopr(char *buffer, const char *format, va_list args)
+{
+ int ch;
+ long_long value;
+ double fvalue;
+ int longlongflag = 0;
+ int longflag = 0;
+ int pointflag = 0;
+ int maxwidth = 0;
+ char *strvalue;
+ int ljust;
+ int len;
+ int zpad;
+
+ output = buffer;
+ while ((ch = *format++))
+ {
+ switch (ch)
+ {
+ case '%':
+ ljust = len = zpad = maxwidth = 0;
+ longflag = longlongflag = pointflag = 0;
+ nextch:
+ ch = *format++;
+ switch (ch)
+ {
+ case 0:
+ dostr("**end of format**", 0);
+ *output = '\0';
+ return;
+ case '-':
+ ljust = 1;
+ goto nextch;
+ case '0': /* set zero padding if len not set */
+ if (len == 0 && !pointflag)
+ zpad = '0';
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ if (pointflag)
+ maxwidth = maxwidth * 10 + ch - '0';
+ else
+ len = len * 10 + ch - '0';
+ goto nextch;
+ case '*':
+ if (pointflag)
+ maxwidth = va_arg(args, int);
+ else
+ len = va_arg(args, int);
+ goto nextch;
+ case '.':
+ pointflag = 1;
+ goto nextch;
+ case 'l':
+ if (longflag)
+ longlongflag = 1;
+ else
+ longflag = 1;
+ goto nextch;
+ case 'u':
+ case 'U':
+ /* fmtnum(value,base,dosign,ljust,len,zpad) */
+ if (longflag)
+ {
+ if (longlongflag)
+ value = va_arg(args, ulong_long);
+ else
+ value = va_arg(args, unsigned long);
+ }
+ else
+ value = va_arg(args, unsigned int);
+ fmtnum(value, 10, 0, ljust, len, zpad);
+ break;
+ case 'o':
+ case 'O':
+ /* fmtnum(value,base,dosign,ljust,len,zpad) */
+ if (longflag)
+ {
+ if (longlongflag)
+ value = va_arg(args, ulong_long);
+ else
+ value = va_arg(args, unsigned long);
+ }
+ else
+ value = va_arg(args, unsigned int);
+ fmtnum(value, 8, 0, ljust, len, zpad);
+ break;
+ case 'd':
+ case 'D':
+ if (longflag)
+ {
+ if (longlongflag)
+ value = va_arg(args, long_long);
+ else
+ value = va_arg(args, long);
+ }
+ else
+ value = va_arg(args, int);
+ fmtnum(value, 10, 1, ljust, len, zpad);
+ break;
+ case 'x':
+ if (longflag)
+ {
+ if (longlongflag)
+ value = va_arg(args, ulong_long);
+ else
+ value = va_arg(args, unsigned long);
+ }
+ else
+ value = va_arg(args, unsigned int);
+ fmtnum(value, 16, 0, ljust, len, zpad);
+ break;
+ case 'X':
+ if (longflag)
+ {
+ if (longlongflag)
+ value = va_arg(args, ulong_long);
+ else
+ value = va_arg(args, unsigned long);
+ }
+ else
+ value = va_arg(args, unsigned int);
+ fmtnum(value, -16, 0, ljust, len, zpad);
+ break;
+ case 's':
+ strvalue = va_arg(args, char *);
+ if (maxwidth > 0 || !pointflag)
+ {
+ if (pointflag && len > maxwidth)
+ len = maxwidth; /* Adjust padding */
+ fmtstr(strvalue, ljust, len, zpad, maxwidth);
+ }
+ break;
+ case 'c':
+ ch = va_arg(args, int);
+ dopr_outch(ch);
+ break;
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'g':
+ case 'G':
+ fvalue = va_arg(args, double);
+ fmtfloat(fvalue, ch, ljust, len, maxwidth, pointflag);
+ break;
+ case '%':
+ dopr_outch(ch);
+ continue;
+ default:
+ dostr("???????", 0);
+ }
+ break;
+ default:
+ dopr_outch(ch);
+ break;
+ }
+ }
+ *output = '\0';
+}
+
+static void
+fmtstr(char *value, int ljust, int len, int zpad, int maxwidth)
+{
+ int padlen,
+ strlen; /* amount to pad */
+
+ if (value == 0)
+ value = "<NULL>";
+ for (strlen = 0; value[strlen]; ++strlen); /* strlen */
+ if (strlen > maxwidth && maxwidth)
+ strlen = maxwidth;
+ padlen = len - strlen;
+ if (padlen < 0)
+ padlen = 0;
+ if (ljust)
+ padlen = -padlen;
+ while (padlen > 0)
+ {
+ dopr_outch(' ');
+ --padlen;
+ }
+ dostr(value, maxwidth);
+ while (padlen < 0)
+ {
+ dopr_outch(' ');
+ ++padlen;
+ }
+}
+
+static void
+fmtnum(long_long value, int base, int dosign, int ljust, int len, int zpad)
+{
+ int signvalue = 0;
+ ulong_long uvalue;
+ char convert[64];
+ int place = 0;
+ int padlen = 0; /* amount to pad */
+ int caps = 0;
+
+ /*
+ * DEBUGP(("value 0x%x, base %d, dosign %d, ljust %d, len %d, zpad
+ * %d\n", value, base, dosign, ljust, len, zpad ));
+ */
+ uvalue = value;
+ if (dosign)
+ {
+ if (value < 0)
+ {
+ signvalue = '-';
+ uvalue = -value;
+ }
+ }
+ if (base < 0)
+ {
+ caps = 1;
+ base = -base;
+ }
+ do
+ {
+ convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
+ [uvalue % (unsigned) base];
+ uvalue = (uvalue / (unsigned) base);
+ } while (uvalue);
+ convert[place] = 0;
+
+ if (len < 0)
+ {
+ /* this could happen with a "*" width spec */
+ ljust = 1;
+ len = -len;
+ }
+ padlen = len - place;
+ if (padlen < 0)
+ padlen = 0;
+ if (ljust)
+ padlen = -padlen;
+
+ /*
+ * DEBUGP(( "str '%s', place %d, sign %c, padlen %d\n",
+ * convert,place,signvalue,padlen));
+ */
+ if (zpad && padlen > 0)
+ {
+ if (signvalue)
+ {
+ dopr_outch(signvalue);
+ --padlen;
+ signvalue = 0;
+ }
+ while (padlen > 0)
+ {
+ dopr_outch(zpad);
+ --padlen;
+ }
+ }
+ while (padlen > 0)
+ {
+ dopr_outch(' ');
+ --padlen;
+ }
+ if (signvalue)
+ dopr_outch(signvalue);
+ while (place > 0)
+ dopr_outch(convert[--place]);
+ while (padlen < 0)
+ {
+ dopr_outch(' ');
+ ++padlen;
+ }
+}
+
+static void
+fmtfloat(double value, char type, int ljust, int len, int precision, int pointflag)
+{
+ char fmt[32];
+ char convert[512];
+ int padlen = 0; /* amount to pad */
+
+ /* we rely on regular C library's sprintf to do the basic conversion */
+ if (pointflag)
+ sprintf(fmt, "%%.%d%c", precision, type);
+ else
+ sprintf(fmt, "%%%c", type);
+ sprintf(convert, fmt, value);
+
+ if (len < 0)
+ {
+ /* this could happen with a "*" width spec */
+ ljust = 1;
+ len = -len;
+ }
+ padlen = len - strlen(convert);
+ if (padlen < 0)
+ padlen = 0;
+ if (ljust)
+ padlen = -padlen;
+
+ while (padlen > 0)
+ {
+ dopr_outch(' ');
+ --padlen;
+ }
+ dostr(convert, 0);
+ while (padlen < 0)
+ {
+ dopr_outch(' ');
+ ++padlen;
+ }
+}
+
+static void
+dostr(char *str, int cut)
+{
+ if (cut)
+ {
+ while (*str && cut-- > 0)
+ dopr_outch(*str++);
+ }
+ else
+ {
+ while (*str)
+ dopr_outch(*str++);
+ }
+}
+
+static void
+dopr_outch(int c)
+{
+#ifdef NOT_USED
+ if (iscntrl((unsigned char) c) && c != '\n' && c != '\t')
+ {
+ c = '@' + (c & 0x1F);
+ if (end == 0 || output < end)
+ *output++ = '^';
+ }
+#endif
+ if (end == 0 || output < end)
+ *output++ = c;
+ else
+ SnprfOverflow++;
+}
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