Top level directory reorg
Move src/po -> po Combine common and compat -> lib/util Move zlib -> lib/zlib
This commit is contained in:
Todd C. Miller
663
lib/util/snprintf.c
Normal file
663
lib/util/snprintf.c
Normal file
@@ -0,0 +1,663 @@
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/*
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* Copyright (c) 1999-2005, 2008, 2010-2013
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* Todd C. Miller <Todd.Miller@courtesan.com>
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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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
|
||||
* 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. 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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* From: @(#)vfprintf.c 8.1 (Berkeley) 6/4/93
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*/
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/*
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* v?snprintf/v?asprintf based on 4.4BSD stdio.
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* NOTE: does not support floating point.
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*/
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#include <config.h>
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#if !defined(HAVE_VSNPRINTF) || !defined(HAVE_SNPRINTF) || \
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!defined(HAVE_VASPRINTF) || !defined(HAVE_ASPRINTF) || \
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defined(PREFER_PORTABLE_SNPRINTF)
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#include <sys/types.h>
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#include <stdio.h>
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stddef.h>
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#else
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# ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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# endif
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#endif /* STDC_HEADERS */
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#if defined(HAVE_STDINT_H)
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# include <stdint.h>
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#elif defined(HAVE_INTTYPES_H)
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# include <inttypes.h>
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#endif
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#ifdef HAVE_STRING_H
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# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
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# include <memory.h>
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# endif
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# include <string.h>
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif /* HAVE_STRINGS_H */
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#if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
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# include <malloc.h>
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#endif /* HAVE_MALLOC_H && !STDC_HEADERS */
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#include <limits.h>
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#include <stdarg.h>
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#include "missing.h"
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static int xxxprintf(char **, size_t, int, const char *, va_list);
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/*
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* Macros for converting digits to letters and vice versa
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*/
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#define to_digit(c) ((c) - '0')
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#define is_digit(c) ((unsigned int)to_digit(c) <= 9)
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#define to_char(n) ((n) + '0')
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/*
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* Flags used during conversion.
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*/
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#define ALT 0x001 /* alternate form */
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#define HEXPREFIX 0x002 /* add 0x or 0X prefix */
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#define LADJUST 0x004 /* left adjustment */
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#define LONGDBL 0x008 /* long double; unimplemented */
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#define LONGINT 0x010 /* long integer */
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#define LLONGINT 0x020 /* quad integer */
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#define SHORTINT 0x040 /* short integer */
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#define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
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#define BUF 68
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/*
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* Convert an unsigned long to ASCII for printf purposes, returning
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* a pointer to the first character of the string representation.
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* Octal numbers can be forced to have a leading zero; hex numbers
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* use the given digits.
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*/
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static char *
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__ultoa(unsigned long val, char *endp, int base, int octzero, char *xdigs)
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{
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char *cp = endp;
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long sval;
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/*
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* Handle the three cases separately, in the hope of getting
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* better/faster code.
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*/
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switch (base) {
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case 10:
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if (val < 10) { /* many numbers are 1 digit */
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*--cp = to_char(val);
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return cp;
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}
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/*
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* On many machines, unsigned arithmetic is harder than
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* signed arithmetic, so we do at most one unsigned mod and
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* divide; this is sufficient to reduce the range of
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* the incoming value to where signed arithmetic works.
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*/
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if (val > LONG_MAX) {
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*--cp = to_char(val % 10);
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sval = val / 10;
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} else
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sval = val;
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do {
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*--cp = to_char(sval % 10);
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sval /= 10;
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} while (sval != 0);
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break;
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case 8:
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do {
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*--cp = to_char(val & 7);
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val >>= 3;
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} while (val);
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if (octzero && *cp != '0')
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*--cp = '0';
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break;
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case 16:
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do {
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*--cp = xdigs[val & 15];
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val >>= 4;
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} while (val);
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break;
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default: /* oops */
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abort();
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}
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return cp;
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}
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/* Identical to __ultoa, but for quads. */
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#if SIZEOF_LONG_INT == 8
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# define __ulltoa(v, e, b, o, x) __ultoa((unsigned long)(v), (e), (b), (o), (x))
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#else
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static char *
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__ulltoa(unsigned long long val, char *endp, int base, int octzero, char *xdigs)
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||||
{
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||||
char *cp = endp;
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||||
long long sval;
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||||
|
||||
/* quick test for small values; __ultoa is typically much faster */
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||||
/* (perhaps instead we should run until small, then call __ultoa?) */
|
||||
if (val <= (unsigned long long)ULONG_MAX)
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||||
return __ultoa((unsigned long)val, endp, base, octzero, xdigs);
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||||
switch (base) {
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||||
case 10:
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||||
if (val < 10) {
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*--cp = to_char(val % 10);
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return cp;
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||||
}
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if (val > LLONG_MAX) {
|
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*--cp = to_char(val % 10);
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sval = val / 10;
|
||||
} else
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sval = val;
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||||
do {
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||||
*--cp = to_char(sval % 10);
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sval /= 10;
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||||
} while (sval != 0);
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break;
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||||
|
||||
case 8:
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do {
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||||
*--cp = to_char(val & 7);
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val >>= 3;
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} while (val);
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if (octzero && *cp != '0')
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*--cp = '0';
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break;
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case 16:
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do {
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*--cp = xdigs[val & 15];
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val >>= 4;
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} while (val);
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break;
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default: /* oops */
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abort();
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}
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return cp;
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}
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#endif /* !SIZEOF_LONG_INT */
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/*
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* Actual printf innards.
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*/
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static int
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xxxprintf(char **strp, size_t strsize, int alloc, const char *fmt0, va_list ap)
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{
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char *fmt; /* format string */
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int ch; /* character from fmt */
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int n; /* handy integer (short term usage) */
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char *cp; /* handy char pointer (short term usage) */
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int flags; /* flags as above */
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int ret; /* return value accumulator */
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int width; /* width from format (%8d), or 0 */
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int prec; /* precision from format (%.3d), or -1 */
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char sign; /* sign prefix (' ', '+', '-', or \0) */
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unsigned long ulval = 0; /* integer arguments %[diouxX] */
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unsigned long long ullval = 0; /* long long arguments %ll[diouxX] */
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int base; /* base for [diouxX] conversion */
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int dprec; /* a copy of prec if [diouxX], 0 otherwise */
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int fieldsz; /* field size expanded by sign, etc */
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int realsz; /* field size expanded by dprec */
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int size; /* size of converted field or string */
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char *xdigs = ""; /* digits for [xX] conversion */
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char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */
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char ox[2]; /* space for 0x hex-prefix */
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char *str; /* pointer to string to fill */
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char *estr; /* pointer to last char in str */
|
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/*
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* Choose PADSIZE to trade efficiency vs. size. If larger printf
|
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* fields occur frequently, increase PADSIZE and make the initialisers
|
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* below longer.
|
||||
*/
|
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#define PADSIZE 16 /* pad chunk size */
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static char blanks[PADSIZE] =
|
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{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
|
||||
static char zeroes[PADSIZE] =
|
||||
{'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
|
||||
|
||||
/* Print chars to "str", (allocate as needed if alloc is set). */
|
||||
#define PRINT(ptr, len) do { \
|
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const char *p = ptr; \
|
||||
const char *endp = ptr + len; \
|
||||
while (p < endp && (str < estr || alloc)) { \
|
||||
if (alloc && str >= estr) { \
|
||||
char *t; \
|
||||
strsize = (strsize << 1) + 1; \
|
||||
if (!(t = (char *)realloc(*strp, strsize))) { \
|
||||
free(str); \
|
||||
*strp = NULL; \
|
||||
ret = -1; \
|
||||
goto done; \
|
||||
} \
|
||||
str = t + (str - *strp); \
|
||||
estr = t + strsize - 1; \
|
||||
*strp = t; \
|
||||
} \
|
||||
*str++ = *p++; \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
/* BEWARE, PAD uses `n'. */
|
||||
#define PAD(plen, pstr) do { \
|
||||
if ((n = (plen)) > 0) { \
|
||||
while (n > PADSIZE) { \
|
||||
PRINT(pstr, PADSIZE); \
|
||||
n -= PADSIZE; \
|
||||
} \
|
||||
PRINT(pstr, n); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
* To extend shorts properly, we need both signed and unsigned
|
||||
* argument extraction methods.
|
||||
*/
|
||||
#define SARG() \
|
||||
(flags&LONGINT ? va_arg(ap, long) : \
|
||||
flags&SHORTINT ? (long)(short)va_arg(ap, int) : \
|
||||
(long)va_arg(ap, int))
|
||||
#define UARG() \
|
||||
(flags&LONGINT ? va_arg(ap, unsigned long) : \
|
||||
flags&SHORTINT ? (unsigned long)(unsigned short)va_arg(ap, int) : \
|
||||
(unsigned long)va_arg(ap, unsigned int))
|
||||
|
||||
fmt = (char *)fmt0;
|
||||
ret = 0;
|
||||
|
||||
if (alloc) {
|
||||
strsize = 128;
|
||||
*strp = str = (char *)malloc(strsize);
|
||||
if (str == NULL) {
|
||||
ret = -1;
|
||||
goto done;
|
||||
}
|
||||
estr = str + 127;
|
||||
} else {
|
||||
str = *strp;
|
||||
if (strsize)
|
||||
estr = str + strsize - 1;
|
||||
else
|
||||
estr = NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Scan the format for conversions (`%' character).
|
||||
*/
|
||||
for (;;) {
|
||||
for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
|
||||
/* void */;
|
||||
if ((n = fmt - cp) != 0) {
|
||||
PRINT(cp, n);
|
||||
ret += n;
|
||||
}
|
||||
if (ch == '\0')
|
||||
goto done;
|
||||
fmt++; /* skip over '%' */
|
||||
|
||||
flags = 0;
|
||||
dprec = 0;
|
||||
width = 0;
|
||||
prec = -1;
|
||||
sign = '\0';
|
||||
|
||||
rflag: ch = *fmt++;
|
||||
reswitch: switch (ch) {
|
||||
case ' ':
|
||||
/*
|
||||
* ``If the space and + flags both appear, the space
|
||||
* flag will be ignored.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
if (!sign)
|
||||
sign = ' ';
|
||||
goto rflag;
|
||||
case '#':
|
||||
flags |= ALT;
|
||||
goto rflag;
|
||||
case '*':
|
||||
/*
|
||||
* ``A negative field width argument is taken as a
|
||||
* - flag followed by a positive field width.''
|
||||
* -- ANSI X3J11
|
||||
* They don't exclude field widths read from args.
|
||||
*/
|
||||
if ((width = va_arg(ap, int)) >= 0)
|
||||
goto rflag;
|
||||
width = -width;
|
||||
/* FALLTHROUGH */
|
||||
case '-':
|
||||
flags |= LADJUST;
|
||||
goto rflag;
|
||||
case '+':
|
||||
sign = '+';
|
||||
goto rflag;
|
||||
case '.':
|
||||
if ((ch = *fmt++) == '*') {
|
||||
n = va_arg(ap, int);
|
||||
prec = n < 0 ? -1 : n;
|
||||
goto rflag;
|
||||
}
|
||||
n = 0;
|
||||
while (is_digit(ch)) {
|
||||
n = 10 * n + to_digit(ch);
|
||||
ch = *fmt++;
|
||||
}
|
||||
prec = n < 0 ? -1 : n;
|
||||
goto reswitch;
|
||||
case '0':
|
||||
/*
|
||||
* ``Note that 0 is taken as a flag, not as the
|
||||
* beginning of a field width.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
flags |= ZEROPAD;
|
||||
goto rflag;
|
||||
case '1': case '2': case '3': case '4':
|
||||
case '5': case '6': case '7': case '8': case '9':
|
||||
n = 0;
|
||||
do {
|
||||
n = 10 * n + to_digit(ch);
|
||||
ch = *fmt++;
|
||||
} while (is_digit(ch));
|
||||
width = n;
|
||||
goto reswitch;
|
||||
case 'h':
|
||||
flags |= SHORTINT;
|
||||
goto rflag;
|
||||
case 'l':
|
||||
if (*fmt == 'l') {
|
||||
fmt++;
|
||||
flags |= LLONGINT;
|
||||
} else {
|
||||
flags |= LONGINT;
|
||||
}
|
||||
goto rflag;
|
||||
case 'c':
|
||||
*(cp = buf) = va_arg(ap, int);
|
||||
size = 1;
|
||||
sign = '\0';
|
||||
break;
|
||||
case 'D':
|
||||
flags |= LONGINT;
|
||||
/*FALLTHROUGH*/
|
||||
case 'd':
|
||||
case 'i':
|
||||
if (flags & LLONGINT) {
|
||||
ullval = va_arg(ap, long long);
|
||||
if ((long long)ullval < 0) {
|
||||
ullval = -ullval;
|
||||
sign = '-';
|
||||
}
|
||||
} else {
|
||||
ulval = SARG();
|
||||
if ((long)ulval < 0) {
|
||||
ulval = -ulval;
|
||||
sign = '-';
|
||||
}
|
||||
}
|
||||
base = 10;
|
||||
goto number;
|
||||
case 'n':
|
||||
if (flags & LLONGINT)
|
||||
*va_arg(ap, long long *) = ret;
|
||||
else if (flags & LONGINT)
|
||||
*va_arg(ap, long *) = ret;
|
||||
else if (flags & SHORTINT)
|
||||
*va_arg(ap, short *) = ret;
|
||||
else
|
||||
*va_arg(ap, int *) = ret;
|
||||
continue; /* no output */
|
||||
case 'O':
|
||||
flags |= LONGINT;
|
||||
/*FALLTHROUGH*/
|
||||
case 'o':
|
||||
if (flags & LLONGINT)
|
||||
ullval = va_arg(ap, unsigned long long);
|
||||
else
|
||||
ulval = UARG();
|
||||
base = 8;
|
||||
goto nosign;
|
||||
case 'p':
|
||||
/*
|
||||
* ``The argument shall be a pointer to void. The
|
||||
* value of the pointer is converted to a sequence
|
||||
* of printable characters, in an implementation-
|
||||
* defined manner.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
ulval = (unsigned long)va_arg(ap, void *);
|
||||
base = 16;
|
||||
xdigs = "0123456789abcdef";
|
||||
flags = (flags & ~LLONGINT) | HEXPREFIX;
|
||||
ch = 'x';
|
||||
goto nosign;
|
||||
case 's':
|
||||
if ((cp = va_arg(ap, char *)) == NULL)
|
||||
cp = "(null)";
|
||||
if (prec >= 0) {
|
||||
/*
|
||||
* can't use strlen; can only look for the
|
||||
* NUL in the first `prec' characters, and
|
||||
* strlen() will go further.
|
||||
*/
|
||||
char *p = memchr(cp, 0, prec);
|
||||
|
||||
if (p != NULL) {
|
||||
size = p - cp;
|
||||
if (size > prec)
|
||||
size = prec;
|
||||
} else
|
||||
size = prec;
|
||||
} else
|
||||
size = strlen(cp);
|
||||
sign = '\0';
|
||||
break;
|
||||
case 'U':
|
||||
flags |= LONGINT;
|
||||
/*FALLTHROUGH*/
|
||||
case 'u':
|
||||
if (flags & LLONGINT)
|
||||
ullval = va_arg(ap, unsigned long long);
|
||||
else
|
||||
ulval = UARG();
|
||||
base = 10;
|
||||
goto nosign;
|
||||
case 'X':
|
||||
xdigs = "0123456789ABCDEF";
|
||||
goto hex;
|
||||
case 'x':
|
||||
xdigs = "0123456789abcdef";
|
||||
hex:
|
||||
if (flags & LLONGINT)
|
||||
ullval = va_arg(ap, unsigned long long);
|
||||
else
|
||||
ulval = UARG();
|
||||
base = 16;
|
||||
/* leading 0x/X only if non-zero */
|
||||
if (flags & ALT &&
|
||||
(flags & LLONGINT ? ullval != 0 : ulval != 0))
|
||||
flags |= HEXPREFIX;
|
||||
|
||||
/* unsigned conversions */
|
||||
nosign: sign = '\0';
|
||||
/*
|
||||
* ``... diouXx conversions ... if a precision is
|
||||
* specified, the 0 flag will be ignored.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
number: if ((dprec = prec) >= 0)
|
||||
flags &= ~ZEROPAD;
|
||||
|
||||
/*
|
||||
* ``The result of converting a zero value with an
|
||||
* explicit precision of zero is no characters.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
cp = buf + BUF;
|
||||
if (flags & LLONGINT) {
|
||||
if (ullval != 0 || prec != 0)
|
||||
cp = __ulltoa(ullval, cp, base,
|
||||
flags & ALT, xdigs);
|
||||
} else {
|
||||
if (ulval != 0 || prec != 0)
|
||||
cp = __ultoa(ulval, cp, base,
|
||||
flags & ALT, xdigs);
|
||||
}
|
||||
size = buf + BUF - cp;
|
||||
break;
|
||||
default: /* "%?" prints ?, unless ? is NUL */
|
||||
if (ch == '\0')
|
||||
goto done;
|
||||
/* pretend it was %c with argument ch */
|
||||
cp = buf;
|
||||
*cp = ch;
|
||||
size = 1;
|
||||
sign = '\0';
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* All reasonable formats wind up here. At this point, `cp'
|
||||
* points to a string which (if not flags&LADJUST) should be
|
||||
* padded out to `width' places. If flags&ZEROPAD, it should
|
||||
* first be prefixed by any sign or other prefix; otherwise,
|
||||
* it should be blank padded before the prefix is emitted.
|
||||
* After any left-hand padding and prefixing, emit zeroes
|
||||
* required by a decimal [diouxX] precision, then print the
|
||||
* string proper, then emit zeroes required by any leftover
|
||||
* floating precision; finally, if LADJUST, pad with blanks.
|
||||
*
|
||||
* Compute actual size, so we know how much to pad.
|
||||
* fieldsz excludes decimal prec; realsz includes it.
|
||||
*/
|
||||
fieldsz = size;
|
||||
if (sign)
|
||||
fieldsz++;
|
||||
else if (flags & HEXPREFIX)
|
||||
fieldsz += 2;
|
||||
realsz = dprec > fieldsz ? dprec : fieldsz;
|
||||
|
||||
/* right-adjusting blank padding */
|
||||
if ((flags & (LADJUST|ZEROPAD)) == 0)
|
||||
PAD(width - realsz, blanks);
|
||||
|
||||
/* prefix */
|
||||
if (sign) {
|
||||
PRINT(&sign, 1);
|
||||
} else if (flags & HEXPREFIX) {
|
||||
ox[0] = '0';
|
||||
ox[1] = ch;
|
||||
PRINT(ox, 2);
|
||||
}
|
||||
|
||||
/* right-adjusting zero padding */
|
||||
if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
|
||||
PAD(width - realsz, zeroes);
|
||||
|
||||
/* leading zeroes from decimal precision */
|
||||
PAD(dprec - fieldsz, zeroes);
|
||||
|
||||
/* the string or number proper */
|
||||
PRINT(cp, size);
|
||||
|
||||
/* left-adjusting padding (always blank) */
|
||||
if (flags & LADJUST)
|
||||
PAD(width - realsz, blanks);
|
||||
|
||||
/* finally, adjust ret */
|
||||
ret += width > realsz ? width : realsz;
|
||||
}
|
||||
done:
|
||||
if (strsize)
|
||||
*str = '\0';
|
||||
return ret;
|
||||
/* NOTREACHED */
|
||||
}
|
||||
|
||||
#if !defined(HAVE_VSNPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
|
||||
int
|
||||
rpl_vsnprintf(char *str, size_t n, const char *fmt, va_list ap)
|
||||
{
|
||||
|
||||
return xxxprintf(&str, n, 0, fmt, ap);
|
||||
}
|
||||
#endif /* !HAVE_VSNPRINTF || PREFER_PORTABLE_SNPRINTF */
|
||||
|
||||
#if !defined(HAVE_SNPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
|
||||
int
|
||||
rpl_snprintf(char *str, size_t n, char const *fmt, ...)
|
||||
{
|
||||
int ret;
|
||||
va_list ap;
|
||||
|
||||
va_start(ap, fmt);
|
||||
ret = xxxprintf(&str, n, 0, fmt, ap);
|
||||
va_end(ap);
|
||||
return ret;
|
||||
}
|
||||
#endif /* !HAVE_SNPRINTF || PREFER_PORTABLE_SNPRINTF */
|
||||
|
||||
#if !defined(HAVE_VASPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
|
||||
int
|
||||
rpl_vasprintf(char **str, const char *fmt, va_list ap)
|
||||
{
|
||||
|
||||
return xxxprintf(str, 0, 1, fmt, ap);
|
||||
}
|
||||
#endif /* !HAVE_VASPRINTF || PREFER_PORTABLE_SNPRINTF */
|
||||
|
||||
#if !defined(HAVE_ASPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
|
||||
int
|
||||
rpl_asprintf(char **str, char const *fmt, ...)
|
||||
{
|
||||
int ret;
|
||||
va_list ap;
|
||||
|
||||
va_start(ap, fmt);
|
||||
ret = xxxprintf(str, 0, 1, fmt, ap);
|
||||
va_end(ap);
|
||||
return ret;
|
||||
}
|
||||
#endif /* !HAVE_ASPRINTF || PREFER_PORTABLE_SNPRINTF */
|
||||
|
||||
#endif /* !HAVE_VSNPRINTF || !HAVE_SNPRINTF || !HAVE_VASPRINTF || !HAVE_ASPRINTF || PREFER_PORTABLE_SNPRINTF */
|
||||
Reference in New Issue
Block a user