1/*
2 * COPYRIGHT AND PERMISSION NOTICE
3 *
4 * Copyright (c) 2003 Embedded Unit Project
5 *
6 * All rights reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining
9 * a copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, and/or sell copies of the Software, and to permit persons
13 * to whom the Software is furnished to do so, provided that the above
14 * copyright notice(s) and this permission notice appear in all copies
15 * of the Software and that both the above copyright notice(s) and this
16 * permission notice appear in supporting documentation.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
21 * OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
22 * HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY
23 * SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER
24 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
25 * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
26 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
27 *
28 * Except as contained in this notice, the name of a copyright holder
29 * shall not be used in advertising or otherwise to promote the sale,
30 * use or other dealings in this Software without prior written
31 * authorization of the copyright holder.
32 *
33 * $Id: stdImpl.c,v 1.3 2004/02/10 16:15:25 arms22 Exp $
34 */
35#include "stdImpl.h"
36
37char* stdimpl_strcpy(char *dst, const char *src)
38{
39	char *start = dst;
40	char c;
41	do {
42		c = *src;
43		*dst = c;
44		src++;
45		dst++;
46	} while (c);
47	return start;
48}
49
50char* stdimpl_strcat(char *dst, const char *src)
51{
52	char *start = dst;
53	char c;
54	do {
55		c = *dst;
56		dst++;
57	} while (c);
58	dst--;
59	do {
60		c = *src;
61		*dst = c;
62		src++;
63		dst++;
64	} while (c);
65	return start;
66}
67
68char* stdimpl_strncat(char *dst, const char *src,unsigned int count)
69{
70	char *start = dst;
71	char c;
72	do {
73		c = *dst;
74		dst++;
75	} while (c);
76	dst--;
77	if (count) {
78		do {
79			c = *src;
80			*dst = c;
81			src++;
82			dst++;
83			count--;
84		} while (c && count);
85		*dst = '\0';
86	}
87	return start;
88}
89
90int stdimpl_strlen(const char *str)
91{
92    const char *estr = str;
93	char c;
94	do {
95		c = *estr;
96		estr++;
97	} while (c);
98    return ((int)(estr - str - 1));
99}
100
101int stdimpl_strcmp(const char *s1, const char *s2)
102{
103	char c1,c2;
104	do {
105		c1 = *s1++;
106		c2 = *s2++;
107	} while ((c1) && (c2) && (c1==c2));
108	return c1 - c2;
109}
110
111static char* _xtoa(unsigned long v,char *string, int r, int is_neg)
112{
113	char *start = string;
114	char buf[33],*p;
115
116	p = buf;
117
118	do {
119		*p++ = "0123456789abcdef"[(v % r) & 0xf];
120	} while (v /= r);
121
122	if (is_neg) {
123		*p++ = '-';
124	}
125
126	do {
127		*string++ = *--p;
128	} while (buf != p);
129
130	*string = '\0';
131
132	return start;
133}
134
135char* stdimpl_itoa(int v,char *string,int r)
136{
137    if ((r == 10) && (v < 0)) {
138		return _xtoa((unsigned long)(-v), string, r, 1);
139	}
140	return _xtoa((unsigned long)(v), string, r, 0);
141}
142