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elemental-ircd/src/irc_string.c

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/*
* ircd-ratbox: A slightly useful ircd.
* irc_string.c: IRC string functions.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox development team
*
* 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* $Id: irc_string.c 678 2006-02-03 20:25:01Z jilles $
*/
#include "stdinc.h"
#include "sprintf_irc.h"
#include "tools.h"
#include "irc_string.h"
#include "client.h"
#include "memory.h"
#include "setup.h"
#ifndef INADDRSZ
#define INADDRSZ 4
#endif
#ifdef IPV6
#ifndef IN6ADDRSZ
#define IN6ADDRSZ 16
#endif
#endif
#ifndef INT16SZ
#define INT16SZ 2
#endif
/*
* myctime - This is like standard ctime()-function, but it zaps away
* the newline from the end of that string. Also, it takes
* the time value as parameter, instead of pointer to it.
* Note that it is necessary to copy the string to alternate
* buffer (who knows how ctime() implements it, maybe it statically
* has newline there and never 'refreshes' it -- zapping that
* might break things in other places...)
*
*
* Thu Nov 24 18:22:48 1986
*/
const char *
myctime(time_t value)
{
static char buf[32];
char *p;
strcpy(buf, ctime(&value));
if((p = strchr(buf, '\n')) != NULL)
*p = '\0';
return buf;
}
/*
* clean_string - clean up a string possibly containing garbage
*
* *sigh* Before the kiddies find this new and exciting way of
* annoying opers, lets clean up what is sent to local opers
* -Dianora
*/
char *
clean_string(char *dest, const unsigned char *src, size_t len)
{
char *d = dest;
s_assert(0 != dest);
s_assert(0 != src);
if(dest == NULL || src == NULL)
return NULL;
len -= 3; /* allow for worst case, '^A\0' */
while(*src && (len > 0))
{
if(*src & 0x80) /* if high bit is set */
{
*d++ = '.';
--len;
}
else if(!IsPrint(*src)) /* if NOT printable */
{
*d++ = '^';
--len;
*d++ = 0x40 + *src; /* turn it into a printable */
}
else
*d++ = *src;
++src;
--len;
}
*d = '\0';
return dest;
}
/*
* strip_tabs(dst, src, length)
*
* Copies src to dst, while converting all \t (tabs) into spaces.
*
* NOTE: jdc: I have a gut feeling there's a faster way to do this.
*/
char *
strip_tabs(char *dest, const unsigned char *src, size_t len)
{
char *d = dest;
/* Sanity check; we don't want anything nasty... */
s_assert(0 != dest);
s_assert(0 != src);
if(dest == NULL || src == NULL)
return NULL;
while(*src && (len > 0))
{
if(*src == '\t')
{
*d++ = ' '; /* Translate the tab into a space */
}
else
{
*d++ = *src; /* Copy src to dst */
}
++src;
--len;
}
*d = '\0'; /* Null terminate, thanks and goodbye */
return dest;
}
/*
* strtoken - walk through a string of tokens, using a set of separators
* argv 9/90
*
*/
char *
strtoken(char **save, char *str, const char *fs)
{
char *pos = *save; /* keep last position across calls */
char *tmp;
if(str)
pos = str; /* new string scan */
while(pos && *pos && strchr(fs, *pos) != NULL)
++pos; /* skip leading separators */
if(!pos || !*pos)
return (pos = *save = NULL); /* string contains only sep's */
tmp = pos; /* now, keep position of the token */
while(*pos && strchr(fs, *pos) == NULL)
++pos; /* skip content of the token */
if(*pos)
*pos++ = '\0'; /* remove first sep after the token */
else
pos = NULL; /* end of string */
*save = pos;
return tmp;
}
static const char base64_table[] =
{ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/', '\0'
};
static const char base64_pad = '=';
static const short base64_reverse_table[256] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
unsigned char *
ircd_base64_encode(const unsigned char *str, int length)
{
const unsigned char *current = str;
unsigned char *p;
unsigned char *result;
if ((length + 2) < 0 || ((length + 2) / 3) >= (1 << (sizeof(int) * 8 - 2))) {
return NULL;
}
result = MyMalloc(((length + 2) / 3) * 5);
p = result;
while (length > 2)
{
*p++ = base64_table[current[0] >> 2];
*p++ = base64_table[((current[0] & 0x03) << 4) + (current[1] >> 4)];
*p++ = base64_table[((current[1] & 0x0f) << 2) + (current[2] >> 6)];
*p++ = base64_table[current[2] & 0x3f];
current += 3;
length -= 3;
}
if (length != 0) {
*p++ = base64_table[current[0] >> 2];
if (length > 1) {
*p++ = base64_table[((current[0] & 0x03) << 4) + (current[1] >> 4)];
*p++ = base64_table[(current[1] & 0x0f) << 2];
*p++ = base64_pad;
} else {
*p++ = base64_table[(current[0] & 0x03) << 4];
*p++ = base64_pad;
*p++ = base64_pad;
}
}
*p = '\0';
return result;
}
unsigned char *
ircd_base64_decode(const unsigned char *str, int length, int *ret)
{
const unsigned char *current = str;
int ch, i = 0, j = 0, k;
unsigned char *result;
result = MyMalloc(length + 1);
while ((ch = *current++) != '\0' && length-- > 0) {
if (ch == base64_pad) break;
ch = base64_reverse_table[ch];
if (ch < 0) continue;
switch(i % 4) {
case 0:
result[j] = ch << 2;
break;
case 1:
result[j++] |= ch >> 4;
result[j] = (ch & 0x0f) << 4;
break;
case 2:
result[j++] |= ch >>2;
result[j] = (ch & 0x03) << 6;
break;
case 3:
result[j++] |= ch;
break;
}
i++;
}
k = j;
if (ch == base64_pad) {
switch(i % 4) {
case 1:
free(result);
return NULL;
case 2:
k++;
case 3:
result[k++] = 0;
}
}
result[j] = '\0';
if(ret)
*ret = j;
return result;
}
/*
* From: Thomas Helvey <tomh@inxpress.net>
*/
static const char *IpQuadTab[] = {
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
"10", "11", "12", "13", "14", "15", "16", "17", "18", "19",
"20", "21", "22", "23", "24", "25", "26", "27", "28", "29",
"30", "31", "32", "33", "34", "35", "36", "37", "38", "39",
"40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59",
"60", "61", "62", "63", "64", "65", "66", "67", "68", "69",
"70", "71", "72", "73", "74", "75", "76", "77", "78", "79",
"80", "81", "82", "83", "84", "85", "86", "87", "88", "89",
"90", "91", "92", "93", "94", "95", "96", "97", "98", "99",
"100", "101", "102", "103", "104", "105", "106", "107", "108", "109",
"110", "111", "112", "113", "114", "115", "116", "117", "118", "119",
"120", "121", "122", "123", "124", "125", "126", "127", "128", "129",
"130", "131", "132", "133", "134", "135", "136", "137", "138", "139",
"140", "141", "142", "143", "144", "145", "146", "147", "148", "149",
"150", "151", "152", "153", "154", "155", "156", "157", "158", "159",
"160", "161", "162", "163", "164", "165", "166", "167", "168", "169",
"170", "171", "172", "173", "174", "175", "176", "177", "178", "179",
"180", "181", "182", "183", "184", "185", "186", "187", "188", "189",
"190", "191", "192", "193", "194", "195", "196", "197", "198", "199",
"200", "201", "202", "203", "204", "205", "206", "207", "208", "209",
"210", "211", "212", "213", "214", "215", "216", "217", "218", "219",
"220", "221", "222", "223", "224", "225", "226", "227", "228", "229",
"230", "231", "232", "233", "234", "235", "236", "237", "238", "239",
"240", "241", "242", "243", "244", "245", "246", "247", "248", "249",
"250", "251", "252", "253", "254", "255"
};
/*
* inetntoa - in_addr to string
* changed name to remove collision possibility and
* so behaviour is guaranteed to take a pointer arg.
* -avalon 23/11/92
* inet_ntoa -- returned the dotted notation of a given
* internet number
* argv 11/90).
* inet_ntoa -- its broken on some Ultrix/Dynix too. -avalon
*/
const char *
inetntoa(const char *in)
{
static char buf[16];
char *bufptr = buf;
const unsigned char *a = (const unsigned char *) in;
const char *n;
n = IpQuadTab[*a++];
while(*n)
*bufptr++ = *n++;
*bufptr++ = '.';
n = IpQuadTab[*a++];
while(*n)
*bufptr++ = *n++;
*bufptr++ = '.';
n = IpQuadTab[*a++];
while(*n)
*bufptr++ = *n++;
*bufptr++ = '.';
n = IpQuadTab[*a];
while(*n)
*bufptr++ = *n++;
*bufptr = '\0';
return buf;
}
/*
* Copyright (c) 1996-1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#define SPRINTF(x) ((size_t)ircsprintf x)
/*
* WARNING: Don't even consider trying to compile this on a system where
* sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
*/
static const char *inet_ntop4(const u_char * src, char *dst, unsigned int size);
#ifdef IPV6
static const char *inet_ntop6(const u_char * src, char *dst, unsigned int size);
#endif
/* const char *
* inet_ntop4(src, dst, size)
* format an IPv4 address
* return:
* `dst' (as a const)
* notes:
* (1) uses no statics
* (2) takes a u_char* not an in_addr as input
* author:
* Paul Vixie, 1996.
*/
static const char *
inet_ntop4(const unsigned char *src, char *dst, unsigned int size)
{
if(size < 16)
return NULL;
return strcpy(dst, inetntoa((const char *) src));
}
/* const char *
* inet_ntop6(src, dst, size)
* convert IPv6 binary address into presentation (printable) format
* author:
* Paul Vixie, 1996.
*/
#ifdef IPV6
static const char *
inet_ntop6(const unsigned char *src, char *dst, unsigned int size)
{
/*
* Note that int32_t and int16_t need only be "at least" large enough
* to contain a value of the specified size. On some systems, like
* Crays, there is no such thing as an integer variable with 16 bits.
* Keep this in mind if you think this function should have been coded
* to use pointer overlays. All the world's not a VAX.
*/
char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"], *tp;
struct
{
int base, len;
}
best, cur;
u_int words[IN6ADDRSZ / INT16SZ];
int i;
/*
* Preprocess:
* Copy the input (bytewise) array into a wordwise array.
* Find the longest run of 0x00's in src[] for :: shorthanding.
*/
memset(words, '\0', sizeof words);
for(i = 0; i < IN6ADDRSZ; i += 2)
words[i / 2] = (src[i] << 8) | src[i + 1];
best.base = -1;
cur.base = -1;
for(i = 0; i < (IN6ADDRSZ / INT16SZ); i++)
{
if(words[i] == 0)
{
if(cur.base == -1)
cur.base = i, cur.len = 1;
else
cur.len++;
}
else
{
if(cur.base != -1)
{
if(best.base == -1 || cur.len > best.len)
best = cur;
cur.base = -1;
}
}
}
if(cur.base != -1)
{
if(best.base == -1 || cur.len > best.len)
best = cur;
}
if(best.base != -1 && best.len < 2)
best.base = -1;
/*
* Format the result.
*/
tp = tmp;
for(i = 0; i < (IN6ADDRSZ / INT16SZ); i++)
{
/* Are we inside the best run of 0x00's? */
if(best.base != -1 && i >= best.base && i < (best.base + best.len))
{
if(i == best.base)
{
if(i == 0)
*tp++ = '0';
*tp++ = ':';
}
continue;
}
/* Are we following an initial run of 0x00s or any real hex? */
if(i != 0)
*tp++ = ':';
/* Is this address an encapsulated IPv4? */
if(i == 6 && best.base == 0 &&
(best.len == 6 || (best.len == 5 && words[5] == 0xffff)))
{
if(!inet_ntop4(src + 12, tp, sizeof tmp - (tp - tmp)))
return (NULL);
tp += strlen(tp);
break;
}
tp += SPRINTF((tp, "%x", words[i]));
}
/* Was it a trailing run of 0x00's? */
if(best.base != -1 && (best.base + best.len) == (IN6ADDRSZ / INT16SZ))
*tp++ = ':';
*tp++ = '\0';
/*
* Check for overflow, copy, and we're done.
*/
if((unsigned int) (tp - tmp) > size)
{
return (NULL);
}
return strcpy(dst, tmp);
}
#endif
int
inetpton_sock(const char *src, struct sockaddr *dst)
{
if(inetpton(AF_INET, src, &((struct sockaddr_in *) dst)->sin_addr))
{
((struct sockaddr_in *) dst)->sin_port = 0;
((struct sockaddr_in *) dst)->sin_family = AF_INET;
SET_SS_LEN(*((struct irc_sockaddr_storage *) dst), sizeof(struct sockaddr_in));
return 1;
}
#ifdef IPV6
else if(inetpton(AF_INET6, src, &((struct sockaddr_in6 *) dst)->sin6_addr))
{
((struct sockaddr_in6 *) dst)->sin6_port = 0;
((struct sockaddr_in6 *) dst)->sin6_family = AF_INET6;
SET_SS_LEN(*((struct irc_sockaddr_storage *) dst), sizeof(struct sockaddr_in6));
return 1;
}
#endif
return 0;
}
const char *
inetntop_sock(struct sockaddr *src, char *dst, unsigned int size)
{
switch (src->sa_family)
{
case AF_INET:
return (inetntop(AF_INET, &((struct sockaddr_in *) src)->sin_addr, dst, size));
break;
#ifdef IPV6
case AF_INET6:
return (inetntop(AF_INET6, &((struct sockaddr_in6 *) src)->sin6_addr, dst, size));
break;
#endif
default:
return NULL;
break;
}
}
/* char *
* inetntop(af, src, dst, size)
* convert a network format address to presentation format.
* return:
* pointer to presentation format address (`dst'), or NULL (see errno).
* author:
* Paul Vixie, 1996.
*/
const char *
inetntop(int af, const void *src, char *dst, unsigned int size)
{
switch (af)
{
case AF_INET:
return (inet_ntop4(src, dst, size));
#ifdef IPV6
case AF_INET6:
if(IN6_IS_ADDR_V4MAPPED((const struct in6_addr *) src) ||
IN6_IS_ADDR_V4COMPAT((const struct in6_addr *) src))
return (inet_ntop4
((const unsigned char *)
&((const struct in6_addr *) src)->s6_addr[12], dst, size));
else
return (inet_ntop6(src, dst, size));
#endif
default:
return (NULL);
}
/* NOTREACHED */
}
/*
* WARNING: Don't even consider trying to compile this on a system where
* sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
*/
/* int
* inetpton(af, src, dst)
* convert from presentation format (which usually means ASCII printable)
* to network format (which is usually some kind of binary format).
* return:
* 1 if the address was valid for the specified address family
* 0 if the address wasn't valid (`dst' is untouched in this case)
* -1 if some other error occurred (`dst' is untouched in this case, too)
* author:
* Paul Vixie, 1996.
*/
/* int
* inet_pton4(src, dst)
* like inet_aton() but without all the hexadecimal and shorthand.
* return:
* 1 if `src' is a valid dotted quad, else 0.
* notice:
* does not touch `dst' unless it's returning 1.
* author:
* Paul Vixie, 1996.
*/
static int
inet_pton4(src, dst)
const char *src;
u_char *dst;
{
int saw_digit, octets, ch;
u_char tmp[INADDRSZ], *tp;
saw_digit = 0;
octets = 0;
*(tp = tmp) = 0;
while((ch = *src++) != '\0')
{
if(ch >= '0' && ch <= '9')
{
u_int new = *tp * 10 + (ch - '0');
if(new > 255)
return (0);
*tp = new;
if(!saw_digit)
{
if(++octets > 4)
return (0);
saw_digit = 1;
}
}
else if(ch == '.' && saw_digit)
{
if(octets == 4)
return (0);
*++tp = 0;
saw_digit = 0;
}
else
return (0);
}
if(octets < 4)
return (0);
memcpy(dst, tmp, INADDRSZ);
return (1);
}
#ifdef IPV6
/* int
* inet_pton6(src, dst)
* convert presentation level address to network order binary form.
* return:
* 1 if `src' is a valid [RFC1884 2.2] address, else 0.
* notice:
* (1) does not touch `dst' unless it's returning 1.
* (2) :: in a full address is silently ignored.
* credit:
* inspired by Mark Andrews.
* author:
* Paul Vixie, 1996.
*/
static int
inet_pton6(src, dst)
const char *src;
u_char *dst;
{
static const char xdigits[] = "0123456789abcdef";
u_char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
const char *curtok;
int ch, saw_xdigit;
u_int val;
tp = memset(tmp, '\0', IN6ADDRSZ);
endp = tp + IN6ADDRSZ;
colonp = NULL;
/* Leading :: requires some special handling. */
if(*src == ':')
if(*++src != ':')
return (0);
curtok = src;
saw_xdigit = 0;
val = 0;
while((ch = tolower(*src++)) != '\0')
{
const char *pch;
pch = strchr(xdigits, ch);
if(pch != NULL)
{
val <<= 4;
val |= (pch - xdigits);
if(val > 0xffff)
return (0);
saw_xdigit = 1;
continue;
}
if(ch == ':')
{
curtok = src;
if(!saw_xdigit)
{
if(colonp)
return (0);
colonp = tp;
continue;
}
else if(*src == '\0')
{
return (0);
}
if(tp + INT16SZ > endp)
return (0);
*tp++ = (u_char) (val >> 8) & 0xff;
*tp++ = (u_char) val & 0xff;
saw_xdigit = 0;
val = 0;
continue;
}
if(*src != '\0' && ch == '.')
{
if(((tp + INADDRSZ) <= endp) && inet_pton4(curtok, tp) > 0)
{
tp += INADDRSZ;
saw_xdigit = 0;
break; /* '\0' was seen by inet_pton4(). */
}
}
else
continue;
return (0);
}
if(saw_xdigit)
{
if(tp + INT16SZ > endp)
return (0);
*tp++ = (u_char) (val >> 8) & 0xff;
*tp++ = (u_char) val & 0xff;
}
if(colonp != NULL)
{
/*
* Since some memmove()'s erroneously fail to handle
* overlapping regions, we'll do the shift by hand.
*/
const int n = tp - colonp;
int i;
if(tp == endp)
return (0);
for(i = 1; i <= n; i++)
{
endp[-i] = colonp[n - i];
colonp[n - i] = 0;
}
tp = endp;
}
if(tp != endp)
return (0);
memcpy(dst, tmp, IN6ADDRSZ);
return (1);
}
#endif
int
inetpton(af, src, dst)
int af;
const char *src;
void *dst;
{
switch (af)
{
case AF_INET:
return (inet_pton4(src, dst));
#ifdef IPV6
case AF_INET6:
/* Somebody might have passed as an IPv4 address this is sick but it works */
if(inet_pton4(src, dst))
{
char tmp[HOSTIPLEN];
ircsprintf(tmp, "::ffff:%s", src);
return (inet_pton6(tmp, dst));
}
else
return (inet_pton6(src, dst));
#endif
default:
return (-1);
}
/* NOTREACHED */
}
/*
* strlcat and strlcpy were ripped from openssh 2.5.1p2
* They had the following Copyright info:
*
*
* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef HAVE_STRLCAT
size_t
strlcat(char *dst, const char *src, size_t siz)
{
char *d = dst;
const char *s = src;
size_t n = siz, dlen;
while(n-- != 0 && *d != '\0')
d++;
dlen = d - dst;
n = siz - dlen;
if(n == 0)
return (dlen + strlen(s));
while(*s != '\0')
{
if(n != 1)
{
*d++ = *s;
n--;
}
s++;
}
*d = '\0';
return (dlen + (s - src)); /* count does not include NUL */
}
#endif
#ifndef HAVE_STRLCPY
size_t
strlcpy(char *dst, const char *src, size_t siz)
{
char *d = dst;
const char *s = src;
size_t n = siz;
/* Copy as many bytes as will fit */
if(n != 0 && --n != 0)
{
do
{
if((*d++ = *s++) == 0)
break;
}
while(--n != 0);
}
/* Not enough room in dst, add NUL and traverse rest of src */
if(n == 0)
{
if(siz != 0)
*d = '\0'; /* NUL-terminate dst */
while(*s++)
;
}
return (s - src - 1); /* count does not include NUL */
}
#endif
char *
strip_colour(char *string)
{
char *c = string;
char *c2 = string;
char *last_non_space = NULL;
/* c is source, c2 is target */
for(; c && *c; c++)
switch (*c)
{
case 3:
if(isdigit(c[1]))
{
c++;
if(isdigit(c[1]))
c++;
if(c[1] == ',' && isdigit(c[2]))
{
c += 2;
if(isdigit(c[1]))
c++;
}
}
break;
case 2:
case 6:
case 7:
case 22:
case 23:
case 27:
case 31:
break;
case 32:
*c2++ = *c;
break;
default:
*c2++ = *c;
last_non_space = c2;
break;
}
*c2 = '\0';
if(last_non_space)
*last_non_space = '\0';
return string;
}
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