1/*
2 * Copyright (C) 2008-2012  OMRON SOFTWARE Co., Ltd.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "nj_lib.h"
18#include "nj_ext.h"
19
20
21NJ_CHAR *nj_strcpy(NJ_CHAR *dst, NJ_CHAR *src) {
22
23    NJ_CHAR *ret = dst;
24
25
26    while (*src != NJ_CHAR_NUL) {
27        *dst++ = *src++;
28    }
29    *dst = *src;
30    return ret;
31}
32
33NJ_CHAR *nj_strncpy(NJ_CHAR *dst, NJ_CHAR *src, NJ_UINT16 n) {
34
35    NJ_CHAR *d = dst;
36
37
38    while (n != 0) {
39        if (*src == NJ_CHAR_NUL) {
40            while (n != 0) {
41                *d++ = NJ_CHAR_NUL;
42                n--;
43            }
44            break;
45        } else {
46            *d++ = *src++;
47        }
48        n--;
49    }
50    return dst;
51}
52
53NJ_UINT16 nj_strlen(NJ_CHAR *c) {
54
55    NJ_UINT16 count = 0;
56
57
58    while (*c++ != NJ_CHAR_NUL) {
59        count++;
60    }
61    return count;
62}
63
64NJ_INT16 nj_strcmp(NJ_CHAR *s1, NJ_CHAR *s2) {
65
66    while (*s1 == *s2) {
67        if (*s1 == NJ_CHAR_NUL) {
68            return (0);
69        }
70        s1++;
71        s2++;
72    }
73    return NJ_CHAR_DIFF(s1, s2);
74}
75
76NJ_INT16 nj_strncmp(NJ_CHAR *s1, NJ_CHAR *s2, NJ_UINT16 n) {
77
78    while (n != 0) {
79        if (*s1 != *s2++) {
80            return NJ_CHAR_DIFF(s1, (s2 - 1));
81        }
82        if (*s1++ == NJ_CHAR_NUL) {
83            break;
84        }
85        n--;
86    }
87    return (0);
88}
89
90NJ_UINT16 nj_charlen(NJ_CHAR *c) {
91
92    NJ_UINT16 count = 0;
93
94
95    while (*c != NJ_CHAR_NUL) {
96        count++;
97        c += NJ_CHAR_LEN(c);
98    }
99    return count;
100}
101
102NJ_INT16 nj_charncmp(NJ_CHAR *s1, NJ_CHAR *s2, NJ_UINT16 n) {
103    NJ_UINT16 i;
104
105
106    while (n != 0) {
107        for (i = NJ_CHAR_LEN(s1); i != 0; i--) {
108            if (*s1 != *s2) {
109                return NJ_CHAR_DIFF(s1, s2);
110            }
111            if (*s1 == NJ_CHAR_NUL) {
112                break;
113            }
114            s1++;
115            s2++;
116        }
117        n--;
118    }
119    return (0);
120}
121
122NJ_CHAR *nj_charncpy(NJ_CHAR *dst, NJ_CHAR *src, NJ_UINT16 n) {
123
124    NJ_CHAR *d = dst;
125    NJ_UINT16 i;
126
127
128    while (n != 0) {
129        for (i = NJ_CHAR_LEN(src); i != 0; i--) {
130            *d = *src;
131            if (*src == NJ_CHAR_NUL) {
132                return dst;
133            }
134            d++;
135            src++;
136        }
137        n--;
138    }
139    *d = NJ_CHAR_NUL;
140    return dst;
141}
142
143NJ_UINT8 *nj_memcpy(NJ_UINT8 *dst, NJ_UINT8 *src, NJ_UINT16 n) {
144
145    NJ_UINT8 *d = dst;
146
147
148    while (n != 0) {
149        *d++ = *src++;
150        n--;
151    }
152    return dst;
153}
154