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c0d8bf33305fd6e9d2331557504f40a5ae70fe63
unrealircd/src/ircsprintf.c
T
Bram Matthys 188e7990ba - Temporary fix for ircsprintf %lu 1..6 issue.
2004-09-19 18:32:14 +00:00

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/*
* Unreal Internet Relay Chat Daemon, src/ircsprintf.c
*
* (C) Copyright 1997
*
* Author:
*
* 1024/624ACAD5 1997/01/26 Carlo Wood, Run on IRC <carlo@runaway.xs4all.nl>
* Key fingerprint = 32 EC A7 B6 AC DB 65 A6 F6 F6 55 DD 1C DC FF 61
* Get key from pgp-public-keys server or
* finger carlo@runaway.xs4all.nl for public key (dialin, try at 21-22h GMT).
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
#include "ircsprintf.h"
#include <stdio.h>
/* *INDENT-OFF* */
extern char *base64enc(long i);
const char atoi_tab[4000] = {
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'0','1','0',0, '0','1','1',0, '0','1','2',0, '0','1','3',0, '0','1','4',0,
'0','1','5',0, '0','1','6',0, '0','1','7',0, '0','1','8',0, '0','1','9',0,
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'8','0','0',0, '8','0','1',0, '8','0','2',0, '8','0','3',0, '8','0','4',0,
'8','0','5',0, '8','0','6',0, '8','0','7',0, '8','0','8',0, '8','0','9',0,
'8','1','0',0, '8','1','1',0, '8','1','2',0, '8','1','3',0, '8','1','4',0,
'8','1','5',0, '8','1','6',0, '8','1','7',0, '8','1','8',0, '8','1','9',0,
'8','2','0',0, '8','2','1',0, '8','2','2',0, '8','2','3',0, '8','2','4',0,
'8','2','5',0, '8','2','6',0, '8','2','7',0, '8','2','8',0, '8','2','9',0,
'8','3','0',0, '8','3','1',0, '8','3','2',0, '8','3','3',0, '8','3','4',0,
'8','3','5',0, '8','3','6',0, '8','3','7',0, '8','3','8',0, '8','3','9',0,
'8','4','0',0, '8','4','1',0, '8','4','2',0, '8','4','3',0, '8','4','4',0,
'8','4','5',0, '8','4','6',0, '8','4','7',0, '8','4','8',0, '8','4','9',0,
'8','5','0',0, '8','5','1',0, '8','5','2',0, '8','5','3',0, '8','5','4',0,
'8','5','5',0, '8','5','6',0, '8','5','7',0, '8','5','8',0, '8','5','9',0,
'8','6','0',0, '8','6','1',0, '8','6','2',0, '8','6','3',0, '8','6','4',0,
'8','6','5',0, '8','6','6',0, '8','6','7',0, '8','6','8',0, '8','6','9',0,
'8','7','0',0, '8','7','1',0, '8','7','2',0, '8','7','3',0, '8','7','4',0,
'8','7','5',0, '8','7','6',0, '8','7','7',0, '8','7','8',0, '8','7','9',0,
'8','8','0',0, '8','8','1',0, '8','8','2',0, '8','8','3',0, '8','8','4',0,
'8','8','5',0, '8','8','6',0, '8','8','7',0, '8','8','8',0, '8','8','9',0,
'8','9','0',0, '8','9','1',0, '8','9','2',0, '8','9','3',0, '8','9','4',0,
'8','9','5',0, '8','9','6',0, '8','9','7',0, '8','9','8',0, '8','9','9',0,
'9','0','0',0, '9','0','1',0, '9','0','2',0, '9','0','3',0, '9','0','4',0,
'9','0','5',0, '9','0','6',0, '9','0','7',0, '9','0','8',0, '9','0','9',0,
'9','1','0',0, '9','1','1',0, '9','1','2',0, '9','1','3',0, '9','1','4',0,
'9','1','5',0, '9','1','6',0, '9','1','7',0, '9','1','8',0, '9','1','9',0,
'9','2','0',0, '9','2','1',0, '9','2','2',0, '9','2','3',0, '9','2','4',0,
'9','2','5',0, '9','2','6',0, '9','2','7',0, '9','2','8',0, '9','2','9',0,
'9','3','0',0, '9','3','1',0, '9','3','2',0, '9','3','3',0, '9','3','4',0,
'9','3','5',0, '9','3','6',0, '9','3','7',0, '9','3','8',0, '9','3','9',0,
'9','4','0',0, '9','4','1',0, '9','4','2',0, '9','4','3',0, '9','4','4',0,
'9','4','5',0, '9','4','6',0, '9','4','7',0, '9','4','8',0, '9','4','9',0,
'9','5','0',0, '9','5','1',0, '9','5','2',0, '9','5','3',0, '9','5','4',0,
'9','5','5',0, '9','5','6',0, '9','5','7',0, '9','5','8',0, '9','5','9',0,
'9','6','0',0, '9','6','1',0, '9','6','2',0, '9','6','3',0, '9','6','4',0,
'9','6','5',0, '9','6','6',0, '9','6','7',0, '9','6','8',0, '9','6','9',0,
'9','7','0',0, '9','7','1',0, '9','7','2',0, '9','7','3',0, '9','7','4',0,
'9','7','5',0, '9','7','6',0, '9','7','7',0, '9','7','8',0, '9','7','9',0,
'9','8','0',0, '9','8','1',0, '9','8','2',0, '9','8','3',0, '9','8','4',0,
'9','8','5',0, '9','8','6',0, '9','8','7',0, '9','8','8',0, '9','8','9',0,
'9','9','0',0, '9','9','1',0, '9','9','2',0, '9','9','3',0, '9','9','4',0,
'9','9','5',0, '9','9','6',0, '9','9','7',0, '9','9','8',0, '9','9','9',0 };
/* *INDENT-ON* */
static char scratch_buffer[32];
/*
* sprintf_irc
*
* sprintf_irc is optimized for the formats: %c, %s, %lu, %d and %u.
* Where %lu actually equals %l09u (for printing time_t timestamps).
*
* sprintf_irc is NOT optimized for any other format and resorts to using
* the normal sprintf when it encounters a format it doesn't understand
* (including padding, width, precision etc).
*
* The following benchmark was measured on a PPro200 with linux 2.0.30,
* libc 5.4.28, compiled with gcc-2.7.2.1 with -O3.
*
* Format sprintf sprintf_irc Speed up factor
*
* "12345678901234567890" 3.385 us 0.859 us 3.94
* "%s", buffer (20 chars) 3.780 us 0.547 us 6.91
* "%c%c%c", c1, c2, c3 3.640 us 0.376 us 9.68
* "%lu", (time_t)t 5.851 us 0.842 us 6.95
*
* Less important:
* "%d", 31337 4.487 us 0.852 us 5.27
* "%u.%u.%u.%u", 9.069 us 2.431 us 3.73
*
* Not used:
* "%03d", 401 4.348 us
* "%N" 0.216 us 20.13
*
* --Run
*/
char *ircvsprintf(char *str, const char *format, va_list vl)
{
char c;
while ((c = *format++))
{
if (c == '%')
{
c = *format++; /* May never be '\0' ! */
if (c == 'c')
{
*str++ = (char)va_arg(vl, int);
continue;
}
if (c == 's')
{
const char *p1 = va_arg(vl, const char *);
if ((*str = *p1))
while ((*++str = *++p1));
continue;
}
if (c == 'l' && *format == 'u') /* Prints time_t value in interval
[ 100000000 , 4294967295 ]
Actually prints like "%09lu" */
{
unsigned long v1, v2;
const char *ap;
++format;
v1 = va_arg(vl, unsigned long);
/* Fixed to work with %lu == 0 --Stskeeps */
if (v1 == 0L)
{
*str++ = '0';
continue;
}
if (v1 > 999999999L)
{
v2 = v1 / 1000000000;
v1 -= v2 * 1000000000;
*str++ = '0' + v2;
}
v2 = v1 / 1000000;
v1 -= v2 * 1000000;
ap = atoi_tab + (v2 << 2);
*str++ = *ap++;
*str++ = *ap++;
*str++ = *ap;
v2 = v1 / 1000;
v1 -= v2 * 1000;
ap = atoi_tab + (v2 << 2);
*str++ = *ap++;
*str++ = *ap++;
*str++ = *ap;
ap = atoi_tab + (v1 << 2);
*str++ = *ap++;
*str++ = *ap++;
*str++ = *ap;
continue;
}
#if 0 /* Not used */
if (c == 'N') /* Prints "%03u" a numeric value in the
range [ 0, 999 ], padded with zero's */
{
unsigned int v1;
const char *ap;
v1 = va_arg(vl, unsigned int);
ap = atoi_tab + (v1 << 2);
*str++ = *ap++;
*str++ = *ap++;
*str++ = *ap;
continue;
}
#endif
/* Send base64 value */
if (c == 'b')
{
long v1;
char *ap;
v1 = va_arg(vl, long);
for (ap = (char *) base64enc(v1); *ap; ap++)
*str++ = *ap;
continue;
}
if (c == 'B')
{
long v1;
char *ap;
v1 = va_arg(vl, long);
*str++ = '!';
for (ap = (char *) base64enc(v1); *ap; ap++)
*str++ = *ap;
continue;
}
if (c == 'd')
{
unsigned int v1, v2;
const char *ap;
char *s =
&scratch_buffer[sizeof(scratch_buffer) - 2];
v1 = va_arg(vl, int);
if ((int)v1 <= 0)
{
if (v1 == 0)
{
*str++ = '0';
continue;
}
*str++ = '-';
v1 = -v1;
}
do
{
v2 = v1 / 1000;
ap =
atoi_tab + 2 + ((v1 -
1000 * v2) << 2);
*s-- = *ap--;
*s-- = *ap--;
*s-- = *ap;
}
while ((v1 = v2) > 0);
while ('0' == *++s);
*str = *s;
while ((*++str = *++s));
continue;
}
if (c == 'u')
{
unsigned int v1, v2;
const char *ap;
char *s =
&scratch_buffer[sizeof(scratch_buffer) - 2];
v1 = va_arg(vl, unsigned int);
if (v1 == 0)
{
*str++ = '0';
continue;
}
do
{
v2 = v1 / 1000;
ap =
atoi_tab + 2 + ((v1 -
1000 * v2) << 2);
*s-- = *ap--;
*s-- = *ap--;
*s-- = *ap;
}
while ((v1 = v2) > 0);
while ('0' == *++s);
*str = *s;
while ((*++str = *++s));
continue;
}
if (c != '%')
{
format -= 2;
str += vsprintf(str, format, vl);
break;
}
}
*str++ = c;
}
*str = 0;
return str;
}
char *ircsprintf(char *str, const char *format, ...)
{
va_list vl;
char *ret;
va_start(vl, format);
ret = ircvsprintf(str, format, vl);
va_end(vl);
return ret;
}
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