[279] | 1 | /**
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| 2 | * @file ntlibc.c
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| 3 | * @author CuBeatSystems
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| 4 | * @author Shinichiro Nakamura
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| 5 | * @copyright
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| 6 | * ===============================================================
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| 7 | * Natural Tiny Shell (NT-Shell) Version 0.3.1
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| 8 | * ===============================================================
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| 9 | * Copyright (c) 2010-2016 Shinichiro Nakamura
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| 10 | *
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| 11 | * Permission is hereby granted, free of charge, to any person
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| 12 | * obtaining a copy of this software and associated documentation
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| 13 | * files (the "Software"), to deal in the Software without
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| 14 | * restriction, including without limitation the rights to use,
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| 15 | * copy, modify, merge, publish, distribute, sublicense, and/or
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| 16 | * sell copies of the Software, and to permit persons to whom the
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| 17 | * Software is furnished to do so, subject to the following
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| 18 | * conditions:
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| 19 | *
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| 20 | * The above copyright notice and this permission notice shall be
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| 21 | * included in all copies or substantial portions of the Software.
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| 22 | *
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| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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| 25 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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| 27 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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| 28 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 29 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 30 | * OTHER DEALINGS IN THE SOFTWARE.
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| 31 | */
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| 32 |
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| 33 | #include "ntlibc.h"
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| 34 |
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| 35 | int ntlibc_strlen(const char *s)
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| 36 | {
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| 37 | const char *p = s;
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| 38 | int cnt = 0;
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| 39 | while (*p) {
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| 40 | cnt++;
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| 41 | p++;
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| 42 | }
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| 43 | return cnt;
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| 44 | }
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| 45 |
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| 46 | char *ntlibc_strcpy(char *des, const char *src)
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| 47 | {
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| 48 | char *d = des;
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| 49 | const char *s = src;
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| 50 | while (*s) {
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| 51 | *d = *s;
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| 52 | d++;
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| 53 | s++;
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| 54 | }
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| 55 | *d = '\0';
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| 56 | return des;
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| 57 | }
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| 58 |
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| 59 | char *ntlibc_strcat(char *des, const char *src)
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| 60 | {
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| 61 | char *d = des;
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| 62 | const char *s = src;
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| 63 | while (*d) {
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| 64 | d++;
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| 65 | }
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| 66 | while (*s) {
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| 67 | *d = *s;
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| 68 | d++;
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| 69 | s++;
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| 70 | }
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| 71 | *d = '\0';
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| 72 | return des;
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| 73 | }
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| 74 |
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| 75 | int ntlibc_strcmp(const char *s1, const char *s2)
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| 76 | {
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| 77 | char *p1 = (char *)s1;
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| 78 | char *p2 = (char *)s2;
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| 79 | while (*p1 || *p2) {
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| 80 | if (*p1 != *p2) {
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| 81 | return (*p1 < *p2) ? -1 : 1;
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| 82 | }
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| 83 | p1++;
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| 84 | p2++;
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| 85 | }
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| 86 | if (*p1 == *p2) {
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| 87 | return 0;
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| 88 | }
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| 89 | else {
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| 90 | return (*p1 < *p2) ? -1 : 1;
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| 91 | }
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| 92 | }
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| 93 |
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| 94 | int ntlibc_stricmp(const char *s1, const char *s2)
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| 95 | {
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| 96 | char *p1 = (char *)s1;
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| 97 | char *p2 = (char *)s2;
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| 98 | while (*p1 || *p2) {
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| 99 | if (ntlibc_toupper(*p1) != ntlibc_toupper(*p2)) {
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| 100 | return (*p1 < *p2) ? -1 : 1;
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| 101 | }
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| 102 | p1++;
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| 103 | p2++;
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| 104 | }
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| 105 | if (*p1 == *p2) {
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| 106 | return 0;
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| 107 | }
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| 108 | else {
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| 109 | return (*p1 < *p2) ? -1 : 1;
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| 110 | }
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| 111 | }
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| 112 |
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| 113 | int ntlibc_strncmp(const char *s1, const char *s2, int n)
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| 114 | {
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| 115 | char *p1 = (char *)s1;
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| 116 | char *p2 = (char *)s2;
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| 117 | int len = 0;
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| 118 | while (*p1 || *p2) {
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| 119 | if (n <= len) {
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| 120 | break;
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| 121 | }
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| 122 | if (*p1 != *p2) {
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| 123 | return (*p1 < *p2) ? -1 : 1;
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| 124 | }
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| 125 | p1++;
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| 126 | p2++;
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| 127 | len++;
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| 128 | }
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| 129 | return 0;
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| 130 | }
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| 131 |
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| 132 | int ntlibc_isdigit(int c)
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| 133 | {
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| 134 | if (('0' <= c) && (c <= '9')) {
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| 135 | return 1;
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| 136 | }
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| 137 | return 0;
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| 138 | }
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| 139 |
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| 140 | int ntlibc_isalpha(int c)
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| 141 | {
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| 142 | if (('A' <= c) && (c <= 'Z')) {
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| 143 | return 1;
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| 144 | }
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| 145 | if (('a' <= c) && (c <= 'z')) {
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| 146 | return 1;
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| 147 | }
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| 148 | return 0;
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| 149 | }
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| 150 |
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| 151 | int ntlibc_iscntrl(int c)
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| 152 | {
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| 153 | if (c == 0x07) { return 0; }
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| 154 | if (c == 0x08) { return 0; }
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| 155 | if (c == 0x09) { return 0; }
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| 156 | if (c == 0x0a) { return 0; }
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| 157 | if (c == 0x0b) { return 0; }
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| 158 | if (c == 0x0c) { return 0; }
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| 159 | if (c == 0x0d) { return 0; }
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| 160 | if ((0x00 <= c) && (c <= 0x1f)) {
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| 161 | return 1;
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| 162 | }
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| 163 | return 0;
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| 164 | }
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| 165 |
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| 166 | int ntlibc_toupper(int c)
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| 167 | {
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| 168 | if (('a' <= c) && (c <= 'z')) {
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| 169 | int diff = 'a' - 'A';
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| 170 | return c - diff;
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| 171 | }
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| 172 | return c;
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| 173 | }
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| 174 |
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| 175 | int ntlibc_tolower(int c)
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| 176 | {
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| 177 | if (('A' <= c) && (c <= 'Z')) {
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| 178 | int diff = 'a' - 'A';
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| 179 | return c + diff;
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| 180 | }
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| 181 | return c;
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| 182 | }
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| 183 |
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| 184 | int ntlibc_atoi(const char *nptr)
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| 185 | {
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| 186 | int cnt;
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| 187 | int num = 0;
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| 188 | int ofs = 0;
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| 189 | int sign = 0;
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| 190 | int scnt = 0;
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| 191 | char *p = (char *)nptr;
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| 192 | while (*p != '\0') {
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| 193 | if (!ntlibc_isdigit(*p)) {
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| 194 | if (*p == ' ') {
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| 195 | ofs++;
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| 196 | }
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| 197 | if (*p == '+') {
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| 198 | sign = 0;
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| 199 | ofs++;
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| 200 | if (scnt++ > 0) {
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| 201 | return 0;
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| 202 | }
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| 203 | }
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| 204 | if (*p == '-') {
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| 205 | sign = 1;
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| 206 | ofs++;
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| 207 | if (scnt++ > 0) {
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| 208 | return 0;
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| 209 | }
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| 210 | }
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| 211 | }
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| 212 | p++;
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| 213 | }
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| 214 | for (cnt = ofs; (nptr[cnt] >= '0') && (nptr[cnt] <= '9'); cnt++) {
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| 215 | num = 10 * num + (nptr[cnt] - '0');
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| 216 | }
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| 217 | if (sign) {
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| 218 | return -num;
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| 219 | }
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| 220 | else {
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| 221 | return num;
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| 222 | }
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| 223 | }
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| 224 |
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| 225 | char *ntlibc_strchr(const char *s, int c)
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| 226 | {
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| 227 | char *p = (char *)s;
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| 228 | for (;;) {
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| 229 | if (*p == c) {
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| 230 | return p;
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| 231 | }
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| 232 | if (!*p)
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| 233 | break;
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| 234 | p++;
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| 235 | }
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| 236 | return 0;
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| 237 | }
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| 238 |
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| 239 | char *ntlibc_utoa(unsigned int value, char *s, int radix)
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| 240 | {
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| 241 | char *s1 = s;
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| 242 | char *s2 = s;
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| 243 |
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| 244 | do {
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| 245 | *s2++ = "0123456789abcdefghijklmnopqrstuvwxyz"[value % radix];
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| 246 | value /= radix;
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| 247 | } while (value > 0);
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| 248 |
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| 249 | *s2-- = '\0';
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| 250 |
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| 251 | while (s1 < s2) {
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| 252 | char c = *s1;
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| 253 | *s1++ = *s2;
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| 254 | *s2-- = c;
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| 255 | }
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| 256 |
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| 257 | return s;
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| 258 | }
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