mirror of
https://github.com/postgres/postgres.git
synced 2025-07-02 09:02:37 +03:00
Move libc replacement files from src/backend/port to src/port.
This commit is contained in:
Bruce Momjian
470
src/port/snprintf.c
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470
src/port/snprintf.c
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@ -0,0 +1,470 @@
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/*
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* Copyright (c) 1983, 1995, 1996 Eric P. Allman
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* might be in either frontend or backend */
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#include "postgres_fe.h"
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#include <sys/ioctl.h>
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#include <sys/param.h>
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/*
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* We do all internal arithmetic in the widest available integer type,
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* here called long_long (or ulong_long for unsigned).
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*/
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#ifdef HAVE_LONG_LONG_INT_64
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typedef long long long_long;
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typedef unsigned long long ulong_long;
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#else
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typedef long long_long;
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typedef unsigned long ulong_long;
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#endif
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/*
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** SNPRINTF, VSNPRINT -- counted versions of printf
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**
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** These versions have been grabbed off the net. They have been
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** cleaned up to compile properly and support for .precision and
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** %lx has been added.
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*/
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/**************************************************************
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* Original:
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* Patrick Powell Tue Apr 11 09:48:21 PDT 1995
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* A bombproof version of doprnt (dopr) included.
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* Sigh. This sort of thing is always nasty do deal with. Note that
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* the version here does not include floating point. (now it does ... tgl)
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*
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* snprintf() is used instead of sprintf() as it does limit checks
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* for string length. This covers a nasty loophole.
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*
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* The other functions are there to prevent NULL pointers from
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* causing nast effects.
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**************************************************************/
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/*static char _id[] = "$Id: snprintf.c,v 1.1 2002/07/18 04:13:59 momjian Exp $";*/
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static char *end;
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static int SnprfOverflow;
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int snprintf(char *str, size_t count, const char *fmt,...);
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int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
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static void dopr(char *buffer, const char *format, va_list args);
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int
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snprintf(char *str, size_t count, const char *fmt,...)
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{
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int len;
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va_list args;
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va_start(args, fmt);
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len = vsnprintf(str, count, fmt, args);
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va_end(args);
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return len;
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}
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int
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vsnprintf(char *str, size_t count, const char *fmt, va_list args)
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{
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str[0] = '\0';
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end = str + count - 1;
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SnprfOverflow = 0;
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dopr(str, fmt, args);
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if (count > 0)
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end[0] = '\0';
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return strlen(str);
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}
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/*
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* dopr(): poor man's version of doprintf
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*/
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static void fmtstr(char *value, int ljust, int len, int zpad, int maxwidth);
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static void fmtnum(long_long value, int base, int dosign, int ljust, int len, int zpad);
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static void fmtfloat(double value, char type, int ljust, int len, int precision, int pointflag);
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static void dostr(char *str, int cut);
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static void dopr_outch(int c);
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static char *output;
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static void
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dopr(char *buffer, const char *format, va_list args)
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{
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int ch;
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long_long 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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output = buffer;
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while ((ch = *format++))
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{
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switch (ch)
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{
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case '%':
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ljust = len = zpad = maxwidth = 0;
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longflag = longlongflag = pointflag = 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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dostr("**end of format**", 0);
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*output = '\0';
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return;
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case '-':
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ljust = 1;
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goto nextch;
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case '0': /* set zero padding if len not set */
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if (len == 0 && !pointflag)
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zpad = '0';
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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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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maxwidth = maxwidth * 10 + ch - '0';
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else
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len = len * 10 + ch - '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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else
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len = va_arg(args, int);
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goto nextch;
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case '.':
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pointflag = 1;
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goto nextch;
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case 'l':
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if (longflag)
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longlongflag = 1;
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else
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longflag = 1;
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goto nextch;
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case 'u':
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case 'U':
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/* fmtnum(value,base,dosign,ljust,len,zpad) */
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if (longflag)
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{
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if (longlongflag)
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value = va_arg(args, ulong_long);
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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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fmtnum(value, 10, 0, ljust, len, zpad);
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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) */
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if (longflag)
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{
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if (longlongflag)
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value = va_arg(args, ulong_long);
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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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fmtnum(value, 8, 0, ljust, len, zpad);
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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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value = va_arg(args, long_long);
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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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fmtnum(value, 10, 1, ljust, len, zpad);
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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, ulong_long);
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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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fmtnum(value, 16, 0, ljust, len, zpad);
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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, ulong_long);
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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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fmtnum(value, -16, 0, ljust, len, zpad);
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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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fmtstr(strvalue, ljust, len, zpad, maxwidth);
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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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dopr_outch(ch);
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break;
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case 'e':
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case 'E':
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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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fmtfloat(fvalue, ch, ljust, len, maxwidth, pointflag);
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break;
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case '%':
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dopr_outch(ch);
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continue;
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default:
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dostr("???????", 0);
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}
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break;
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default:
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dopr_outch(ch);
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break;
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}
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}
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*output = '\0';
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}
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static void
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fmtstr(char *value, int ljust, int len, int zpad, int maxwidth)
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{
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int padlen,
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strlen; /* amount to pad */
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if (value == 0)
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value = "<NULL>";
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for (strlen = 0; value[strlen]; ++strlen); /* strlen */
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if (strlen > maxwidth && maxwidth)
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strlen = maxwidth;
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padlen = len - strlen;
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if (padlen < 0)
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padlen = 0;
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if (ljust)
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padlen = -padlen;
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while (padlen > 0)
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{
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dopr_outch(' ');
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--padlen;
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}
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dostr(value, maxwidth);
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while (padlen < 0)
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{
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dopr_outch(' ');
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++padlen;
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}
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}
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static void
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fmtnum(long_long value, int base, int dosign, int ljust, int len, int zpad)
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{
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int signvalue = 0;
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ulong_long uvalue;
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char convert[64];
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int place = 0;
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int padlen = 0; /* amount to pad */
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int caps = 0;
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/*
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* DEBUGP(("value 0x%x, base %d, dosign %d, ljust %d, len %d, zpad
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* %d\n", value, base, dosign, ljust, len, zpad ));
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*/
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uvalue = value;
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if (dosign)
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{
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if (value < 0)
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{
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signvalue = '-';
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uvalue = -value;
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}
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}
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if (base < 0)
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{
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caps = 1;
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base = -base;
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}
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do
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{
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convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
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[uvalue % (unsigned) base];
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uvalue = (uvalue / (unsigned) base);
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} while (uvalue);
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convert[place] = 0;
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if (len < 0)
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{
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/* this could happen with a "*" width spec */
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ljust = 1;
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len = -len;
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}
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padlen = len - place;
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if (padlen < 0)
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padlen = 0;
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if (ljust)
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padlen = -padlen;
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/*
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* DEBUGP(( "str '%s', place %d, sign %c, padlen %d\n",
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* convert,place,signvalue,padlen));
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*/
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if (zpad && padlen > 0)
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{
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if (signvalue)
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{
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dopr_outch(signvalue);
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--padlen;
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signvalue = 0;
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}
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while (padlen > 0)
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{
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dopr_outch(zpad);
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--padlen;
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}
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}
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while (padlen > 0)
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{
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dopr_outch(' ');
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--padlen;
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}
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if (signvalue)
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dopr_outch(signvalue);
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while (place > 0)
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dopr_outch(convert[--place]);
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while (padlen < 0)
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{
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dopr_outch(' ');
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++padlen;
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}
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}
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static void
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fmtfloat(double value, char type, int ljust, int len, int precision, int pointflag)
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{
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char fmt[32];
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char convert[512];
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int padlen = 0; /* amount to pad */
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/* we rely on regular C library's sprintf to do the basic conversion */
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if (pointflag)
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sprintf(fmt, "%%.%d%c", precision, type);
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else
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sprintf(fmt, "%%%c", type);
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sprintf(convert, fmt, value);
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if (len < 0)
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{
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/* this could happen with a "*" width spec */
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ljust = 1;
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len = -len;
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}
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padlen = len - strlen(convert);
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if (padlen < 0)
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padlen = 0;
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if (ljust)
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padlen = -padlen;
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while (padlen > 0)
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{
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dopr_outch(' ');
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--padlen;
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}
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dostr(convert, 0);
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while (padlen < 0)
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{
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dopr_outch(' ');
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++padlen;
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}
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}
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static void
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dostr(char *str, int cut)
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{
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if (cut)
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{
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while (*str && cut-- > 0)
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dopr_outch(*str++);
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}
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else
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{
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while (*str)
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dopr_outch(*str++);
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}
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}
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static void
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dopr_outch(int c)
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{
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#ifdef NOT_USED
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||||
if (iscntrl((unsigned char) c) && c != '\n' && c != '\t')
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||||
{
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c = '@' + (c & 0x1F);
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if (end == 0 || output < end)
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*output++ = '^';
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}
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#endif
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if (end == 0 || output < end)
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*output++ = c;
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else
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SnprfOverflow++;
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}
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Block a user