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
stdimpl_strcpy(char * dst,const char * src)37 char* 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
stdimpl_strcat(char * dst,const char * src)50 char* 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
stdimpl_strncat(char * dst,const char * src,unsigned int count)68 char* 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
stdimpl_strlen(const char * str)90 int 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
stdimpl_strcmp(const char * s1,const char * s2)101 int 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
_xtoa(unsigned long v,char * string,int r,int is_neg)111 static 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
stdimpl_itoa(int v,char * string,int r)135 char* 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