author | Mikael Berthe <mikael@lilotux.net> |
Mon, 15 May 2006 23:06:13 +0200 | |
changeset 857 | ef35a2bb40d7 |
parent 417 | c3ae9251c197 |
permissions | -rw-r--r-- |
25 | 1 |
/* ==================================================================== |
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* Copyright (c) 1995-1998 The Apache Group. 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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* |
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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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* |
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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 |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the Apache Group |
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* for use in the Apache HTTP server project (http://www.apache.org/)." |
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* |
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* 4. The names "Apache Server" and "Apache Group" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. |
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* |
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* 5. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the Apache Group |
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* for use in the Apache HTTP server project (http://www.apache.org/)." |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of the Apache Group and was originally based |
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* on public domain software written at the National Center for |
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* Supercomputing Applications, University of Illinois, Urbana-Champaign. |
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* For more information on the Apache Group and the Apache HTTP server |
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* project, please see <http://www.apache.org/>. |
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* |
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* This code is based on, and used with the permission of, the |
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* SIO stdio-replacement strx_* functions by Panos Tsirigotis |
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* <panos@alumni.cs.colorado.edu> for xinetd. |
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*/ |
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/** |
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* @file snprintf.c |
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* @brief implement snprintf if not present in the libc |
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* |
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* snprintf is not implemented by all libc implementations, this file implements this |
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* function, if it is not already present. You should not call any of the functions |
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* in this file directly! |
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*/ |
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#include <libxode.h> |
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#if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) |
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#include <stdio.h> |
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#include <ctype.h> |
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#include <sys/types.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include <math.h> |
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#ifdef HAVE_GCVT |
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#define ap_ecvt ecvt |
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#define ap_fcvt fcvt |
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#define ap_gcvt gcvt |
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#else |
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/* |
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* cvt.c - IEEE floating point formatting routines for FreeBSD |
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* from GNU libc-4.6.27 |
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*/ |
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/* |
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* ap_ecvt converts to decimal |
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* the number of digits is specified by ndigit |
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* decpt is set to the position of the decimal point |
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* sign is set to 0 for positive, 1 for negative |
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*/ |
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#define NDIG 80 |
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static char * |
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ap_cvt(double arg, int ndigits, int *decpt, int *sign, int eflag) |
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{ |
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register int r2; |
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double fi, fj; |
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register char *p, *p1; |
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static char buf[NDIG]; |
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if (ndigits >= NDIG - 1) |
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ndigits = NDIG - 2; |
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r2 = 0; |
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*sign = 0; |
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p = &buf[0]; |
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if (arg < 0) { |
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*sign = 1; |
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arg = -arg; |
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} |
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arg = modf(arg, &fi); |
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p1 = &buf[NDIG]; |
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/* |
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* Do integer part |
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*/ |
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if (fi != 0) { |
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p1 = &buf[NDIG]; |
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while (fi != 0) { |
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fj = modf(fi / 10, &fi); |
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*--p1 = (int) ((fj + .03) * 10) + '0'; |
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r2++; |
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} |
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while (p1 < &buf[NDIG]) |
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*p++ = *p1++; |
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} else if (arg > 0) { |
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while ((fj = arg * 10) < 1) { |
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arg = fj; |
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r2--; |
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} |
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} |
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p1 = &buf[ndigits]; |
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if (eflag == 0) |
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p1 += r2; |
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*decpt = r2; |
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if (p1 < &buf[0]) { |
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buf[0] = '\0'; |
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return (buf); |
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} |
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while (p <= p1 && p < &buf[NDIG]) { |
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arg *= 10; |
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arg = modf(arg, &fj); |
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*p++ = (int) fj + '0'; |
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} |
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if (p1 >= &buf[NDIG]) { |
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buf[NDIG - 1] = '\0'; |
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return (buf); |
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} |
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p = p1; |
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*p1 += 5; |
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while (*p1 > '9') { |
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*p1 = '0'; |
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if (p1 > buf) |
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++ * --p1; |
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else { |
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*p1 = '1'; |
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(*decpt)++; |
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if (eflag == 0) { |
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if (p > buf) |
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*p = '0'; |
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p++; |
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} |
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} |
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} |
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*p = '\0'; |
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return (buf); |
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} |
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static char * |
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ap_ecvt(double arg, int ndigits, int *decpt, int *sign) |
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{ |
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return (ap_cvt(arg, ndigits, decpt, sign, 1)); |
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} |
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static char * |
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ap_fcvt(double arg, int ndigits, int *decpt, int *sign) |
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{ |
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return (ap_cvt(arg, ndigits, decpt, sign, 0)); |
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} |
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/* |
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* ap_gcvt - Floating output conversion to |
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* minimal length string |
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*/ |
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static char * |
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ap_gcvt(double number, int ndigit, char *buf) |
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{ |
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int sign, decpt; |
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register char *p1, *p2; |
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int i; |
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p1 = ap_ecvt(number, ndigit, &decpt, &sign); |
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p2 = buf; |
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if (sign) |
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*p2++ = '-'; |
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for (i = ndigit - 1; i > 0 && p1[i] == '0'; i--) |
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ndigit--; |
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if ((decpt >= 0 && decpt - ndigit > 4) |
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|| (decpt < 0 && decpt < -3)) { /* use E-style */ |
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decpt--; |
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*p2++ = *p1++; |
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*p2++ = '.'; |
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for (i = 1; i < ndigit; i++) |
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*p2++ = *p1++; |
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*p2++ = 'e'; |
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if (decpt < 0) { |
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decpt = -decpt; |
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*p2++ = '-'; |
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} else |
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*p2++ = '+'; |
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if (decpt / 100 > 0) |
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*p2++ = decpt / 100 + '0'; |
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if (decpt / 10 > 0) |
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*p2++ = (decpt % 100) / 10 + '0'; |
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*p2++ = decpt % 10 + '0'; |
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} else { |
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if (decpt <= 0) { |
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if (*p1 != '0') |
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*p2++ = '.'; |
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while (decpt < 0) { |
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decpt++; |
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*p2++ = '0'; |
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} |
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} |
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for (i = 1; i <= ndigit; i++) { |
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*p2++ = *p1++; |
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if (i == decpt) |
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*p2++ = '.'; |
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} |
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if (ndigit < decpt) { |
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while (ndigit++ < decpt) |
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*p2++ = '0'; |
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*p2++ = '.'; |
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} |
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} |
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if (p2[-1] == '.') |
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p2--; |
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*p2 = '\0'; |
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return (buf); |
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} |
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#endif /* HAVE_CVT */ |
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typedef enum { |
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NO = 0, YES = 1 |
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} boolean_e; |
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#ifndef FALSE |
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# define FALSE 0 |
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#endif |
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#ifndef TRUE |
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# define TRUE 1 |
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#endif |
25 | 260 |
#define NUL '\0' |
261 |
#define INT_NULL ((int *)0) |
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#define WIDE_INT long |
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264 |
typedef WIDE_INT wide_int; |
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typedef unsigned WIDE_INT u_wide_int; |
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typedef int bool_int; |
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268 |
#define S_NULL "(null)" |
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#define S_NULL_LEN 6 |
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||
271 |
#define FLOAT_DIGITS 6 |
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#define EXPONENT_LENGTH 10 |
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273 |
||
274 |
/* |
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* NUM_BUF_SIZE is the size of the buffer used for arithmetic conversions |
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* |
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* XXX: this is a magic number; do not decrease it |
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*/ |
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#define NUM_BUF_SIZE 512 |
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280 |
||
281 |
||
282 |
/* |
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283 |
* Descriptor for buffer area |
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284 |
*/ |
|
285 |
struct buf_area { |
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286 |
char *buf_end; |
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287 |
char *nextb; /* pointer to next byte to read/write */ |
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288 |
}; |
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289 |
||
290 |
typedef struct buf_area buffy; |
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291 |
||
292 |
/* |
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293 |
* The INS_CHAR macro inserts a character in the buffer and writes |
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294 |
* the buffer back to disk if necessary |
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295 |
* It uses the char pointers sp and bep: |
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296 |
* sp points to the next available character in the buffer |
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297 |
* bep points to the end-of-buffer+1 |
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298 |
* While using this macro, note that the nextb pointer is NOT updated. |
|
299 |
* |
|
300 |
* NOTE: Evaluation of the c argument should not have any side-effects |
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301 |
*/ |
|
302 |
#define INS_CHAR( c, sp, bep, cc ) \ |
|
303 |
{ \ |
|
304 |
if ( sp < bep ) \ |
|
305 |
{ \ |
|
306 |
*sp++ = c ; \ |
|
307 |
cc++ ; \ |
|
308 |
} \ |
|
309 |
} |
|
310 |
||
311 |
#define NUM( c ) ( c - '0' ) |
|
312 |
||
313 |
#define STR_TO_DEC( str, num ) \ |
|
314 |
num = NUM( *str++ ) ; \ |
|
315 |
while ( isdigit((int)*str ) ) \ |
|
316 |
{ \ |
|
317 |
num *= 10 ; \ |
|
318 |
num += NUM( *str++ ) ; \ |
|
319 |
} |
|
320 |
||
321 |
/* |
|
322 |
* This macro does zero padding so that the precision |
|
323 |
* requirement is satisfied. The padding is done by |
|
324 |
* adding '0's to the left of the string that is going |
|
325 |
* to be printed. |
|
326 |
*/ |
|
327 |
#define FIX_PRECISION( adjust, precision, s, s_len ) \ |
|
328 |
if ( adjust ) \ |
|
329 |
while ( s_len < precision ) \ |
|
330 |
{ \ |
|
331 |
*--s = '0' ; \ |
|
332 |
s_len++ ; \ |
|
333 |
} |
|
334 |
||
335 |
/* |
|
336 |
* Macro that does padding. The padding is done by printing |
|
337 |
* the character ch. |
|
338 |
*/ |
|
339 |
#define PAD( width, len, ch ) do \ |
|
340 |
{ \ |
|
341 |
INS_CHAR( ch, sp, bep, cc ) ; \ |
|
342 |
width-- ; \ |
|
343 |
} \ |
|
344 |
while ( width > len ) |
|
345 |
||
346 |
/* |
|
347 |
* Prefix the character ch to the string str |
|
348 |
* Increase length |
|
349 |
* Set the has_prefix flag |
|
350 |
*/ |
|
351 |
#define PREFIX( str, length, ch ) *--str = ch ; length++ ; has_prefix = YES |
|
352 |
||
353 |
||
354 |
/* |
|
355 |
* Convert num to its decimal format. |
|
356 |
* Return value: |
|
357 |
* - a pointer to a string containing the number (no sign) |
|
358 |
* - len contains the length of the string |
|
359 |
* - is_negative is set to TRUE or FALSE depending on the sign |
|
360 |
* of the number (always set to FALSE if is_unsigned is TRUE) |
|
361 |
* |
|
362 |
* The caller provides a buffer for the string: that is the buf_end argument |
|
363 |
* which is a pointer to the END of the buffer + 1 (i.e. if the buffer |
|
364 |
* is declared as buf[ 100 ], buf_end should be &buf[ 100 ]) |
|
365 |
*/ |
|
366 |
static char * |
|
367 |
conv_10(register wide_int num, register bool_int is_unsigned, |
|
368 |
register bool_int * is_negative, char *buf_end, register int *len) |
|
369 |
{ |
|
370 |
register char *p = buf_end; |
|
371 |
register u_wide_int magnitude; |
|
372 |
||
373 |
if (is_unsigned) { |
|
374 |
magnitude = (u_wide_int) num; |
|
375 |
*is_negative = FALSE; |
|
376 |
} else { |
|
377 |
*is_negative = (num < 0); |
|
378 |
||
379 |
/* |
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380 |
* On a 2's complement machine, negating the most negative integer |
25 | 381 |
* results in a number that cannot be represented as a signed integer. |
382 |
* Here is what we do to obtain the number's magnitude: |
|
383 |
* a. add 1 to the number |
|
384 |
* b. negate it (becomes positive) |
|
385 |
* c. convert it to unsigned |
|
386 |
* d. add 1 |
|
387 |
*/ |
|
388 |
if (*is_negative) { |
|
389 |
wide_int t = num + 1; |
|
390 |
||
391 |
magnitude = ((u_wide_int) - t) + 1; |
|
392 |
} else |
|
393 |
magnitude = (u_wide_int) num; |
|
394 |
} |
|
395 |
||
396 |
/* |
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397 |
* We use a do-while loop so that we write at least 1 digit |
25 | 398 |
*/ |
399 |
do { |
|
400 |
register u_wide_int new_magnitude = magnitude / 10; |
|
401 |
||
402 |
*--p = magnitude - new_magnitude * 10 + '0'; |
|
403 |
magnitude = new_magnitude; |
|
404 |
} |
|
405 |
while (magnitude); |
|
406 |
||
407 |
*len = buf_end - p; |
|
408 |
return (p); |
|
409 |
} |
|
410 |
||
411 |
||
412 |
||
413 |
/* |
|
414 |
* Convert a floating point number to a string formats 'f', 'e' or 'E'. |
|
415 |
* The result is placed in buf, and len denotes the length of the string |
|
416 |
* The sign is returned in the is_negative argument (and is not placed |
|
417 |
* in buf). |
|
418 |
*/ |
|
419 |
static char * |
|
420 |
conv_fp(register char format, register double num, |
|
421 |
boolean_e add_dp, int precision, bool_int * is_negative, char *buf, int *len) |
|
422 |
{ |
|
423 |
register char *s = buf; |
|
424 |
register char *p; |
|
425 |
int decimal_point; |
|
426 |
||
427 |
if (format == 'f') |
|
428 |
p = ap_fcvt(num, precision, &decimal_point, is_negative); |
|
429 |
else /* either e or E format */ |
|
430 |
p = ap_ecvt(num, precision + 1, &decimal_point, is_negative); |
|
431 |
||
432 |
/* |
|
433 |
* Check for Infinity and NaN |
|
434 |
*/ |
|
435 |
if (isalpha((int)*p)) { |
|
436 |
*len = strlen(strcpy(buf, p)); |
|
437 |
*is_negative = FALSE; |
|
438 |
return (buf); |
|
439 |
} |
|
440 |
if (format == 'f') { |
|
441 |
if (decimal_point <= 0) { |
|
442 |
*s++ = '0'; |
|
443 |
if (precision > 0) { |
|
444 |
*s++ = '.'; |
|
445 |
while (decimal_point++ < 0) |
|
446 |
*s++ = '0'; |
|
447 |
} else if (add_dp) { |
|
448 |
*s++ = '.'; |
|
449 |
} |
|
450 |
} else { |
|
451 |
while (decimal_point-- > 0) { |
|
452 |
*s++ = *p++; |
|
453 |
} |
|
454 |
if (precision > 0 || add_dp) { |
|
455 |
*s++ = '.'; |
|
456 |
} |
|
457 |
} |
|
458 |
} else { |
|
459 |
*s++ = *p++; |
|
460 |
if (precision > 0 || add_dp) |
|
461 |
*s++ = '.'; |
|
462 |
} |
|
463 |
||
464 |
/* |
|
465 |
* copy the rest of p, the NUL is NOT copied |
|
466 |
*/ |
|
467 |
while (*p) |
|
468 |
*s++ = *p++; |
|
469 |
||
470 |
if (format != 'f') { |
|
471 |
char temp[EXPONENT_LENGTH]; /* for exponent conversion */ |
|
472 |
int t_len; |
|
473 |
bool_int exponent_is_negative; |
|
474 |
||
475 |
*s++ = format; /* either e or E */ |
|
476 |
decimal_point--; |
|
477 |
if (decimal_point != 0) { |
|
478 |
p = conv_10((wide_int) decimal_point, FALSE, &exponent_is_negative, |
|
479 |
&temp[EXPONENT_LENGTH], &t_len); |
|
480 |
*s++ = exponent_is_negative ? '-' : '+'; |
|
481 |
||
482 |
/* |
|
483 |
* Make sure the exponent has at least 2 digits |
|
484 |
*/ |
|
485 |
if (t_len == 1) |
|
486 |
*s++ = '0'; |
|
487 |
while (t_len--) |
|
488 |
*s++ = *p++; |
|
489 |
} else { |
|
490 |
*s++ = '+'; |
|
491 |
*s++ = '0'; |
|
492 |
*s++ = '0'; |
|
493 |
} |
|
494 |
} |
|
495 |
*len = s - buf; |
|
496 |
return (buf); |
|
497 |
} |
|
498 |
||
499 |
||
500 |
/* |
|
501 |
* Convert num to a base X number where X is a power of 2. nbits determines X. |
|
502 |
* For example, if nbits is 3, we do base 8 conversion |
|
503 |
* Return value: |
|
504 |
* a pointer to a string containing the number |
|
505 |
* |
|
506 |
* The caller provides a buffer for the string: that is the buf_end argument |
|
507 |
* which is a pointer to the END of the buffer + 1 (i.e. if the buffer |
|
508 |
* is declared as buf[ 100 ], buf_end should be &buf[ 100 ]) |
|
509 |
*/ |
|
510 |
static char * |
|
511 |
conv_p2(register u_wide_int num, register int nbits, |
|
512 |
char format, char *buf_end, register int *len) |
|
513 |
{ |
|
514 |
register int mask = (1 << nbits) - 1; |
|
515 |
register char *p = buf_end; |
|
516 |
static char low_digits[] = "0123456789abcdef"; |
|
517 |
static char upper_digits[] = "0123456789ABCDEF"; |
|
518 |
register char *digits = (format == 'X') ? upper_digits : low_digits; |
|
519 |
||
520 |
do { |
|
521 |
*--p = digits[num & mask]; |
|
522 |
num >>= nbits; |
|
523 |
} |
|
524 |
while (num); |
|
525 |
||
526 |
*len = buf_end - p; |
|
527 |
return (p); |
|
528 |
} |
|
529 |
||
530 |
||
531 |
/* |
|
532 |
* Do format conversion placing the output in buffer |
|
533 |
*/ |
|
534 |
static int format_converter(register buffy * odp, const char *fmt, |
|
535 |
va_list ap) |
|
536 |
{ |
|
537 |
register char *sp; |
|
538 |
register char *bep; |
|
539 |
register int cc = 0; |
|
540 |
register int i; |
|
541 |
||
542 |
register char *s = NULL; |
|
543 |
char *q; |
|
544 |
int s_len; |
|
545 |
||
546 |
register int min_width = 0; |
|
547 |
int precision = 0; |
|
548 |
enum { |
|
549 |
LEFT, RIGHT |
|
550 |
} adjust; |
|
551 |
char pad_char; |
|
552 |
char prefix_char; |
|
553 |
||
554 |
double fp_num; |
|
555 |
wide_int i_num = (wide_int) 0; |
|
556 |
u_wide_int ui_num; |
|
557 |
||
558 |
char num_buf[NUM_BUF_SIZE]; |
|
559 |
char char_buf[2]; /* for printing %% and %<unknown> */ |
|
560 |
||
561 |
/* |
|
562 |
* Flag variables |
|
563 |
*/ |
|
564 |
boolean_e is_long; |
|
565 |
boolean_e alternate_form; |
|
566 |
boolean_e print_sign; |
|
567 |
boolean_e print_blank; |
|
568 |
boolean_e adjust_precision; |
|
569 |
boolean_e adjust_width; |
|
570 |
bool_int is_negative; |
|
571 |
||
572 |
sp = odp->nextb; |
|
573 |
bep = odp->buf_end; |
|
574 |
||
575 |
while (*fmt) { |
|
576 |
if (*fmt != '%') { |
|
577 |
INS_CHAR(*fmt, sp, bep, cc); |
|
578 |
} else { |
|
579 |
/* |
|
580 |
* Default variable settings |
|
581 |
*/ |
|
582 |
adjust = RIGHT; |
|
583 |
alternate_form = print_sign = print_blank = NO; |
|
584 |
pad_char = ' '; |
|
585 |
prefix_char = NUL; |
|
586 |
||
587 |
fmt++; |
|
588 |
||
589 |
/* |
|
590 |
* Try to avoid checking for flags, width or precision |
|
591 |
*/ |
|
592 |
if (isascii((int)*fmt) && !islower((int)*fmt)) { |
|
593 |
/* |
|
594 |
* Recognize flags: -, #, BLANK, + |
|
595 |
*/ |
|
596 |
for (;; fmt++) { |
|
597 |
if (*fmt == '-') |
|
598 |
adjust = LEFT; |
|
599 |
else if (*fmt == '+') |
|
600 |
print_sign = YES; |
|
601 |
else if (*fmt == '#') |
|
602 |
alternate_form = YES; |
|
603 |
else if (*fmt == ' ') |
|
604 |
print_blank = YES; |
|
605 |
else if (*fmt == '0') |
|
606 |
pad_char = '0'; |
|
607 |
else |
|
608 |
break; |
|
609 |
} |
|
610 |
||
611 |
/* |
|
612 |
* Check if a width was specified |
|
613 |
*/ |
|
614 |
if (isdigit((int)*fmt)) { |
|
615 |
STR_TO_DEC(fmt, min_width); |
|
616 |
adjust_width = YES; |
|
617 |
} else if (*fmt == '*') { |
|
618 |
min_width = va_arg(ap, int); |
|
619 |
fmt++; |
|
620 |
adjust_width = YES; |
|
621 |
if (min_width < 0) { |
|
622 |
adjust = LEFT; |
|
623 |
min_width = -min_width; |
|
624 |
} |
|
625 |
} else |
|
626 |
adjust_width = NO; |
|
627 |
||
628 |
/* |
|
629 |
* Check if a precision was specified |
|
630 |
* |
|
631 |
* XXX: an unreasonable amount of precision may be specified |
|
632 |
* resulting in overflow of num_buf. Currently we |
|
633 |
* ignore this possibility. |
|
634 |
*/ |
|
635 |
if (*fmt == '.') { |
|
636 |
adjust_precision = YES; |
|
637 |
fmt++; |
|
638 |
if (isdigit((int)*fmt)) { |
|
639 |
STR_TO_DEC(fmt, precision); |
|
640 |
} else if (*fmt == '*') { |
|
641 |
precision = va_arg(ap, int); |
|
642 |
fmt++; |
|
643 |
if (precision < 0) |
|
644 |
precision = 0; |
|
645 |
} else |
|
646 |
precision = 0; |
|
647 |
} else |
|
648 |
adjust_precision = NO; |
|
649 |
} else |
|
650 |
adjust_precision = adjust_width = NO; |
|
651 |
||
652 |
/* |
|
653 |
* Modifier check |
|
654 |
*/ |
|
655 |
if (*fmt == 'l') { |
|
656 |
is_long = YES; |
|
657 |
fmt++; |
|
658 |
} else |
|
659 |
is_long = NO; |
|
660 |
||
661 |
/* |
|
662 |
* Argument extraction and printing. |
|
663 |
* First we determine the argument type. |
|
664 |
* Then, we convert the argument to a string. |
|
665 |
* On exit from the switch, s points to the string that |
|
666 |
* must be printed, s_len has the length of the string |
|
667 |
* The precision requirements, if any, are reflected in s_len. |
|
668 |
* |
|
669 |
* NOTE: pad_char may be set to '0' because of the 0 flag. |
|
670 |
* It is reset to ' ' by non-numeric formats |
|
671 |
*/ |
|
672 |
switch (*fmt) { |
|
673 |
case 'u': |
|
674 |
if (is_long) |
|
675 |
i_num = va_arg(ap, u_wide_int); |
|
676 |
else |
|
677 |
i_num = (wide_int) va_arg(ap, unsigned int); |
|
678 |
/* |
|
679 |
* The rest also applies to other integer formats, so fall |
|
680 |
* into that case. |
|
681 |
*/ |
|
682 |
case 'd': |
|
683 |
case 'i': |
|
684 |
/* |
|
685 |
* Get the arg if we haven't already. |
|
686 |
*/ |
|
687 |
if ((*fmt) != 'u') { |
|
688 |
if (is_long) |
|
689 |
i_num = va_arg(ap, wide_int); |
|
690 |
else |
|
691 |
i_num = (wide_int) va_arg(ap, int); |
|
692 |
}; |
|
693 |
s = conv_10(i_num, (*fmt) == 'u', &is_negative, |
|
694 |
&num_buf[NUM_BUF_SIZE], &s_len); |
|
695 |
FIX_PRECISION(adjust_precision, precision, s, s_len); |
|
696 |
||
697 |
if (*fmt != 'u') { |
|
698 |
if (is_negative) |
|
699 |
prefix_char = '-'; |
|
700 |
else if (print_sign) |
|
701 |
prefix_char = '+'; |
|
702 |
else if (print_blank) |
|
703 |
prefix_char = ' '; |
|
704 |
} |
|
705 |
break; |
|
706 |
||
707 |
||
708 |
case 'o': |
|
709 |
if (is_long) |
|
710 |
ui_num = va_arg(ap, u_wide_int); |
|
711 |
else |
|
712 |
ui_num = (u_wide_int) va_arg(ap, unsigned int); |
|
713 |
s = conv_p2(ui_num, 3, *fmt, |
|
714 |
&num_buf[NUM_BUF_SIZE], &s_len); |
|
715 |
FIX_PRECISION(adjust_precision, precision, s, s_len); |
|
716 |
if (alternate_form && *s != '0') { |
|
717 |
*--s = '0'; |
|
718 |
s_len++; |
|
719 |
} |
|
720 |
break; |
|
721 |
||
722 |
||
723 |
case 'x': |
|
724 |
case 'X': |
|
725 |
if (is_long) |
|
726 |
ui_num = (u_wide_int) va_arg(ap, u_wide_int); |
|
727 |
else |
|
728 |
ui_num = (u_wide_int) va_arg(ap, unsigned int); |
|
729 |
s = conv_p2(ui_num, 4, *fmt, |
|
730 |
&num_buf[NUM_BUF_SIZE], &s_len); |
|
731 |
FIX_PRECISION(adjust_precision, precision, s, s_len); |
|
732 |
if (alternate_form && i_num != 0) { |
|
733 |
*--s = *fmt; /* 'x' or 'X' */ |
|
734 |
*--s = '0'; |
|
735 |
s_len += 2; |
|
736 |
} |
|
737 |
break; |
|
738 |
||
739 |
||
740 |
case 's': |
|
741 |
s = va_arg(ap, char *); |
|
742 |
if (s != NULL) { |
|
743 |
s_len = strlen(s); |
|
744 |
if (adjust_precision && precision < s_len) |
|
745 |
s_len = precision; |
|
746 |
} else { |
|
747 |
s = S_NULL; |
|
748 |
s_len = S_NULL_LEN; |
|
749 |
} |
|
750 |
pad_char = ' '; |
|
751 |
break; |
|
752 |
||
753 |
||
754 |
case 'f': |
|
755 |
case 'e': |
|
756 |
case 'E': |
|
757 |
fp_num = va_arg(ap, double); |
|
758 |
||
759 |
s = conv_fp(*fmt, fp_num, alternate_form, |
|
760 |
(adjust_precision == NO) ? FLOAT_DIGITS : precision, |
|
761 |
&is_negative, &num_buf[1], &s_len); |
|
762 |
if (is_negative) |
|
763 |
prefix_char = '-'; |
|
764 |
else if (print_sign) |
|
765 |
prefix_char = '+'; |
|
766 |
else if (print_blank) |
|
767 |
prefix_char = ' '; |
|
768 |
break; |
|
769 |
||
770 |
||
771 |
case 'g': |
|
772 |
case 'G': |
|
773 |
if (adjust_precision == NO) |
|
774 |
precision = FLOAT_DIGITS; |
|
775 |
else if (precision == 0) |
|
776 |
precision = 1; |
|
777 |
/* |
|
778 |
* * We use &num_buf[ 1 ], so that we have room for the sign |
|
779 |
*/ |
|
780 |
s = ap_gcvt(va_arg(ap, double), precision, &num_buf[1]); |
|
781 |
if (*s == '-') |
|
782 |
prefix_char = *s++; |
|
783 |
else if (print_sign) |
|
784 |
prefix_char = '+'; |
|
785 |
else if (print_blank) |
|
786 |
prefix_char = ' '; |
|
787 |
||
788 |
s_len = strlen(s); |
|
789 |
||
790 |
if (alternate_form && (q = strchr(s, '.')) == NULL) |
|
791 |
s[s_len++] = '.'; |
|
792 |
if (*fmt == 'G' && (q = strchr(s, 'e')) != NULL) |
|
793 |
*q = 'E'; |
|
794 |
break; |
|
795 |
||
796 |
||
797 |
case 'c': |
|
798 |
char_buf[0] = (char) (va_arg(ap, int)); |
|
799 |
s = &char_buf[0]; |
|
800 |
s_len = 1; |
|
801 |
pad_char = ' '; |
|
802 |
break; |
|
803 |
||
804 |
||
805 |
case '%': |
|
806 |
char_buf[0] = '%'; |
|
807 |
s = &char_buf[0]; |
|
808 |
s_len = 1; |
|
809 |
pad_char = ' '; |
|
810 |
break; |
|
811 |
||
812 |
||
813 |
case 'n': |
|
814 |
*(va_arg(ap, int *)) = cc; |
|
815 |
break; |
|
816 |
||
817 |
/* |
|
414
ec86d759ed54
Trailing whitespace cleanup
Mikael Berthe <mikael@lilotux.net>
parents:
25
diff
changeset
|
818 |
* Always extract the argument as a "char *" pointer. We |
ec86d759ed54
Trailing whitespace cleanup
Mikael Berthe <mikael@lilotux.net>
parents:
25
diff
changeset
|
819 |
* should be using "void *" but there are still machines |
25 | 820 |
* that don't understand it. |
821 |
* If the pointer size is equal to the size of an unsigned |
|
414
ec86d759ed54
Trailing whitespace cleanup
Mikael Berthe <mikael@lilotux.net>
parents:
25
diff
changeset
|
822 |
* integer we convert the pointer to a hex number, otherwise |
25 | 823 |
* we print "%p" to indicate that we don't handle "%p". |
824 |
*/ |
|
825 |
case 'p': |
|
826 |
ui_num = (u_wide_int) va_arg(ap, char *); |
|
827 |
||
828 |
if (sizeof(char *) <= sizeof(u_wide_int)) |
|
829 |
s = conv_p2(ui_num, 4, 'x', |
|
830 |
&num_buf[NUM_BUF_SIZE], &s_len); |
|
831 |
else { |
|
832 |
s = "%p"; |
|
833 |
s_len = 2; |
|
834 |
} |
|
835 |
pad_char = ' '; |
|
836 |
break; |
|
837 |
||
838 |
||
839 |
case NUL: |
|
840 |
/* |
|
841 |
* The last character of the format string was %. |
|
842 |
* We ignore it. |
|
843 |
*/ |
|
844 |
continue; |
|
845 |
||
846 |
||
847 |
/* |
|
848 |
* The default case is for unrecognized %'s. |
|
849 |
* We print %<char> to help the user identify what |
|
850 |
* option is not understood. |
|
851 |
* This is also useful in case the user wants to pass |
|
852 |
* the output of format_converter to another function |
|
853 |
* that understands some other %<char> (like syslog). |
|
854 |
* Note that we can't point s inside fmt because the |
|
855 |
* unknown <char> could be preceded by width etc. |
|
856 |
*/ |
|
857 |
default: |
|
858 |
char_buf[0] = '%'; |
|
859 |
char_buf[1] = *fmt; |
|
860 |
s = char_buf; |
|
861 |
s_len = 2; |
|
862 |
pad_char = ' '; |
|
863 |
break; |
|
864 |
} |
|
865 |
||
866 |
if (prefix_char != NUL) { |
|
867 |
*--s = prefix_char; |
|
868 |
s_len++; |
|
869 |
} |
|
870 |
if (adjust_width && adjust == RIGHT && min_width > s_len) { |
|
871 |
if (pad_char == '0' && prefix_char != NUL) { |
|
872 |
INS_CHAR(*s, sp, bep, cc) |
|
873 |
s++; |
|
874 |
s_len--; |
|
875 |
min_width--; |
|
876 |
} |
|
877 |
PAD(min_width, s_len, pad_char); |
|
878 |
} |
|
879 |
/* |
|
414
ec86d759ed54
Trailing whitespace cleanup
Mikael Berthe <mikael@lilotux.net>
parents:
25
diff
changeset
|
880 |
* Print the string s. |
25 | 881 |
*/ |
882 |
for (i = s_len; i != 0; i--) { |
|
883 |
INS_CHAR(*s, sp, bep, cc); |
|
884 |
s++; |
|
885 |
} |
|
886 |
||
887 |
if (adjust_width && adjust == LEFT && min_width > s_len) |
|
888 |
PAD(min_width, s_len, pad_char); |
|
889 |
} |
|
890 |
fmt++; |
|
891 |
} |
|
892 |
odp->nextb = sp; |
|
893 |
return (cc); |
|
894 |
} |
|
895 |
||
896 |
||
897 |
/* |
|
898 |
* This is the general purpose conversion function. |
|
899 |
*/ |
|
900 |
static void strx_printv(int *ccp, char *buf, size_t len, const char *format, |
|
901 |
va_list ap) |
|
902 |
{ |
|
903 |
buffy od; |
|
904 |
int cc; |
|
905 |
||
906 |
/* |
|
907 |
* First initialize the descriptor |
|
908 |
* Notice that if no length is given, we initialize buf_end to the |
|
909 |
* highest possible address. |
|
910 |
*/ |
|
911 |
od.buf_end = len ? &buf[len] : (char *) ~0; |
|
912 |
od.nextb = buf; |
|
913 |
||
914 |
/* |
|
915 |
* Do the conversion |
|
916 |
*/ |
|
917 |
cc = format_converter(&od, format, ap); |
|
918 |
if (len == 0 || od.nextb <= od.buf_end) |
|
919 |
*(od.nextb) = '\0'; |
|
920 |
if (ccp) |
|
921 |
*ccp = cc; |
|
922 |
} |
|
923 |
||
924 |
||
925 |
int ap_snprintf(char *buf, size_t len, const char *format,...) |
|
926 |
{ |
|
927 |
int cc; |
|
928 |
va_list ap; |
|
929 |
||
930 |
va_start(ap, format); |
|
931 |
strx_printv(&cc, buf, (len - 1), format, ap); |
|
932 |
va_end(ap); |
|
933 |
return (cc); |
|
934 |
} |
|
935 |
||
936 |
||
937 |
int ap_vsnprintf(char *buf, size_t len, const char *format, va_list ap) |
|
938 |
{ |
|
939 |
int cc; |
|
940 |
||
941 |
strx_printv(&cc, buf, (len - 1), format, ap); |
|
942 |
return (cc); |
|
943 |
} |
|
944 |
||
945 |
#endif /* HAVE_SNPRINTF */ |