151 lines
3.4 KiB
C
151 lines
3.4 KiB
C
/* NeoStats - IRC Statistical Services
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** Copyright (c) 1999-2003 Adam Rutter, Justin Hammond, Mark Hetherington
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** http://www.neostats.net/
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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** USA
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**
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** NeoStats CVS Identification
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** $Id$
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*/
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/* @file potentially missing C library functions
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*/
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#include <stdio.h>
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#include "stats.h"
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#ifndef HAVE_STRNLEN
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/* @brief find length of string up to count max
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*
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* @return length of string excluding NULL or count if longer
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*
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*/
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inline size_t strnlen(const char * src, size_t count)
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{
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size_t len;
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/* Run through the string until we find NULL or reach count */
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for(len = 0; len < count; len++,src++) {
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if(*src == 0){
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return len;
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}
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}
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#ifdef DEBUG
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printf("strnlen: len at max\n");
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#endif
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/* src is longer or equal to count so return count */
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return count;
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}
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#endif /* HAVE_STRNLEN */
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#ifndef HAVE_STRLCPY
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/* @brief copy up to size-1 characters from src to dst and NULL terminate
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*
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* @return total characters written to string.
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*
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*/
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size_t
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strlcpy(char *dst, const char *src, size_t size)
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{
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size_t copycount;
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/* check size is safe */
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if (size <= 0) {
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#ifdef DEBUG
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printf("strlcpy: size <= 0\n");
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#endif
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return 0;
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}
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/* NULL pointer checks */
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if(!dst || !src) {
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#ifdef DEBUG
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printf("strlcpy: dst (%p) or src (%p) is NULL\n", dst, src);
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#endif
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return 0;
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}
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/* use strnlen so huge strings do not hold us up */
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for(copycount = 0; copycount < size-1 && *src!=0 ; copycount++) {
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*dst++=*src++;
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}
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/* Always null terminate */
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*dst = 0;
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/* count of characters written excluding NULL terminator */
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return copycount;
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}
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#endif /* HAVE_STRLCPY */
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#ifndef HAVE_STRLCAT
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/* @brief append at most size-len(dst)-1 chars from src to dst and NULL terminate
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*
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* @return total characters written to string.
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*
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*/
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size_t
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strlcat(char *dst, const char *src, size_t size)
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{
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size_t lendst;
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size_t copycount;
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/* check size is safe */
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if (size <= 0) {
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#ifdef DEBUG
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printf("strlcat: size <= 0\n");
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#endif
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return 0;
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}
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/* NULL pointer checks */
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if(!dst || !src) {
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#ifdef DEBUG
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printf("strlcat: dst (%p) or src (%p) is NULL\n", dst, src);
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#endif
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return 0;
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}
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/* if src contains NULL just NULL dst then quit to save a little CPU */
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if(*src == '\0') {
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#ifdef DEBUG
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printf("strlcat: src is pointer to NULL\n");
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#endif
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lendst = strnlen(dst, size);
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dst[lendst] = '\0';
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return 0;
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}
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/* use strnlen so huge strings do not hold us up */
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lendst = strnlen(dst, size);
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copycount = strnlen(src, size);
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/* bound copy size */
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if (lendst + copycount >= size) {
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copycount = size - lendst;
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}
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/* memcpy the desired amount */
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if (copycount > 0) {
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memcpy(dst + lendst, src, copycount);
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dst[lendst + copycount] = 0;
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}
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/* count of characters written excluding NULL terminator */
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return copycount;
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}
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#endif /* HAVE_STRLCAT */
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