Shinichiro Nakamura / NaturalTinyShell

Natural Tiny Shell (NT-Shell) library is a tiny shell library for a small embedded system. The interface is really simple. You should only know ntshell_execute in ntshell.h. So you can port it to any embedded system easily. Please enjoy your small embedded system with it. :)

Dependents:   NaturalTinyShell_TestProgram

ntlibc.c@0:7147d6024de8, 2011-05-22 (annotated)

Committer:
shintamainjp
Date:
Sun May 22 02:51:35 2011 +0000
Revision:
0:7147d6024de8
Initial version.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shintamainjp 0:7147d6024de8 1 /**
shintamainjp 0:7147d6024de8 2 * @file ntlibc.c
shintamainjp 0:7147d6024de8 3 * @author Shinichiro Nakamura
shintamainjp 0:7147d6024de8 4 * @brief NT-Shellで用いる小規模libcの実装。
shintamainjp 0:7147d6024de8 5 */
shintamainjp 0:7147d6024de8 6
shintamainjp 0:7147d6024de8 7 /*
shintamainjp 0:7147d6024de8 8 * ===============================================================
shintamainjp 0:7147d6024de8 9 * Natural Tiny Shell (NT-Shell)
shintamainjp 0:7147d6024de8 10 * Version 0.0.6
shintamainjp 0:7147d6024de8 11 * ===============================================================
shintamainjp 0:7147d6024de8 12 * Copyright (c) 2010-2011 Shinichiro Nakamura
shintamainjp 0:7147d6024de8 13 *
shintamainjp 0:7147d6024de8 14 * Permission is hereby granted, free of charge, to any person
shintamainjp 0:7147d6024de8 15 * obtaining a copy of this software and associated documentation
shintamainjp 0:7147d6024de8 16 * files (the "Software"), to deal in the Software without
shintamainjp 0:7147d6024de8 17 * restriction, including without limitation the rights to use,
shintamainjp 0:7147d6024de8 18 * copy, modify, merge, publish, distribute, sublicense, and/or
shintamainjp 0:7147d6024de8 19 * sell copies of the Software, and to permit persons to whom the
shintamainjp 0:7147d6024de8 20 * Software is furnished to do so, subject to the following
shintamainjp 0:7147d6024de8 21 * conditions:
shintamainjp 0:7147d6024de8 22 *
shintamainjp 0:7147d6024de8 23 * The above copyright notice and this permission notice shall be
shintamainjp 0:7147d6024de8 24 * included in all copies or substantial portions of the Software.
shintamainjp 0:7147d6024de8 25 *
shintamainjp 0:7147d6024de8 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
shintamainjp 0:7147d6024de8 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
shintamainjp 0:7147d6024de8 28 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
shintamainjp 0:7147d6024de8 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
shintamainjp 0:7147d6024de8 30 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
shintamainjp 0:7147d6024de8 31 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
shintamainjp 0:7147d6024de8 32 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
shintamainjp 0:7147d6024de8 33 * OTHER DEALINGS IN THE SOFTWARE.
shintamainjp 0:7147d6024de8 34 * ===============================================================
shintamainjp 0:7147d6024de8 35 */
shintamainjp 0:7147d6024de8 36
shintamainjp 0:7147d6024de8 37 #include "ntlibc.h"
shintamainjp 0:7147d6024de8 38
shintamainjp 0:7147d6024de8 39 size_t ntlibc_strlen(const char *s)
shintamainjp 0:7147d6024de8 40 {
shintamainjp 0:7147d6024de8 41 const char *p = s;
shintamainjp 0:7147d6024de8 42 int cnt = 0;
shintamainjp 0:7147d6024de8 43 while (*p) {
shintamainjp 0:7147d6024de8 44 cnt++;
shintamainjp 0:7147d6024de8 45 p++;
shintamainjp 0:7147d6024de8 46 }
shintamainjp 0:7147d6024de8 47 return cnt;
shintamainjp 0:7147d6024de8 48 }
shintamainjp 0:7147d6024de8 49
shintamainjp 0:7147d6024de8 50 char *ntlibc_strcpy(char *des, const char *src)
shintamainjp 0:7147d6024de8 51 {
shintamainjp 0:7147d6024de8 52 char *d = des;
shintamainjp 0:7147d6024de8 53 const char *s = src;
shintamainjp 0:7147d6024de8 54 while (*s) {
shintamainjp 0:7147d6024de8 55 *d = *s;
shintamainjp 0:7147d6024de8 56 d++;
shintamainjp 0:7147d6024de8 57 s++;
shintamainjp 0:7147d6024de8 58 }
shintamainjp 0:7147d6024de8 59 *d = '\0';
shintamainjp 0:7147d6024de8 60 return des;
shintamainjp 0:7147d6024de8 61 }
shintamainjp 0:7147d6024de8 62
shintamainjp 0:7147d6024de8 63 char *ntlibc_strcat(char *des, const char *src)
shintamainjp 0:7147d6024de8 64 {
shintamainjp 0:7147d6024de8 65 char *d = des;
shintamainjp 0:7147d6024de8 66 const char *s = src;
shintamainjp 0:7147d6024de8 67 while (*d) {
shintamainjp 0:7147d6024de8 68 d++;
shintamainjp 0:7147d6024de8 69 }
shintamainjp 0:7147d6024de8 70 while (*s) {
shintamainjp 0:7147d6024de8 71 *d = *s;
shintamainjp 0:7147d6024de8 72 d++;
shintamainjp 0:7147d6024de8 73 s++;
shintamainjp 0:7147d6024de8 74 }
shintamainjp 0:7147d6024de8 75 *d = '\0';
shintamainjp 0:7147d6024de8 76 return des;
shintamainjp 0:7147d6024de8 77 }
shintamainjp 0:7147d6024de8 78
shintamainjp 0:7147d6024de8 79 int ntlibc_strcmp(const char *s1, const char *s2)
shintamainjp 0:7147d6024de8 80 {
shintamainjp 0:7147d6024de8 81 char *p1 = (char *)s1;
shintamainjp 0:7147d6024de8 82 char *p2 = (char *)s2;
shintamainjp 0:7147d6024de8 83 while (*p1 || *p2) {
shintamainjp 0:7147d6024de8 84 if (*p1 != *p2) {
shintamainjp 0:7147d6024de8 85 return (*p1 < *p2) ? -1 : 1;
shintamainjp 0:7147d6024de8 86 }
shintamainjp 0:7147d6024de8 87 p1++;
shintamainjp 0:7147d6024de8 88 p2++;
shintamainjp 0:7147d6024de8 89 }
shintamainjp 0:7147d6024de8 90 if (*p1 == *p2) {
shintamainjp 0:7147d6024de8 91 return 0;
shintamainjp 0:7147d6024de8 92 } else {
shintamainjp 0:7147d6024de8 93 return (*p1 < *p2) ? -1 : 1;
shintamainjp 0:7147d6024de8 94 }
shintamainjp 0:7147d6024de8 95 }
shintamainjp 0:7147d6024de8 96
shintamainjp 0:7147d6024de8 97 int ntlibc_strncmp(const char *s1, const char *s2, size_t n)
shintamainjp 0:7147d6024de8 98 {
shintamainjp 0:7147d6024de8 99 char *p1 = (char *)s1;
shintamainjp 0:7147d6024de8 100 char *p2 = (char *)s2;
shintamainjp 0:7147d6024de8 101 size_t len = 0;
shintamainjp 0:7147d6024de8 102 while (*p1 || *p2) {
shintamainjp 0:7147d6024de8 103 if (n <= len) {
shintamainjp 0:7147d6024de8 104 break;
shintamainjp 0:7147d6024de8 105 }
shintamainjp 0:7147d6024de8 106 if (*p1 != *p2) {
shintamainjp 0:7147d6024de8 107 return (*p1 < *p2) ? -1 : 1;
shintamainjp 0:7147d6024de8 108 }
shintamainjp 0:7147d6024de8 109 p1++;
shintamainjp 0:7147d6024de8 110 p2++;
shintamainjp 0:7147d6024de8 111 len++;
shintamainjp 0:7147d6024de8 112 }
shintamainjp 0:7147d6024de8 113 return 0;
shintamainjp 0:7147d6024de8 114 }
shintamainjp 0:7147d6024de8 115
shintamainjp 0:7147d6024de8 116 #if 0
shintamainjp 0:7147d6024de8 117 #include <stdio.h>
shintamainjp 0:7147d6024de8 118 int main(void);
shintamainjp 0:7147d6024de8 119 int main(void) {
shintamainjp 0:7147d6024de8 120 char *str_a = "That";
shintamainjp 0:7147d6024de8 121 char *str_b = "The";
shintamainjp 0:7147d6024de8 122 printf("strcmp(%s,%s) = %d, %d\n",
shintamainjp 0:7147d6024de8 123 str_a, str_b,
shintamainjp 0:7147d6024de8 124 strcmp(str_a, str_b),
shintamainjp 0:7147d6024de8 125 ntlibc_strcmp(str_a, str_b));
shintamainjp 0:7147d6024de8 126 printf("strncmp(%s,%s,2) = %d, %d\n",
shintamainjp 0:7147d6024de8 127 str_a, str_b,
shintamainjp 0:7147d6024de8 128 strncmp(str_a, str_b, 2),
shintamainjp 0:7147d6024de8 129 ntlibc_strncmp(str_a, str_b, 2));
shintamainjp 0:7147d6024de8 130 printf("strncmp(%s,%s,3) = %d, %d\n",
shintamainjp 0:7147d6024de8 131 str_a, str_b,
shintamainjp 0:7147d6024de8 132 strncmp(str_a, str_b, 3),
shintamainjp 0:7147d6024de8 133 ntlibc_strncmp(str_a, str_b, 3));
shintamainjp 0:7147d6024de8 134 return 0;
shintamainjp 0:7147d6024de8 135 }
shintamainjp 0:7147d6024de8 136 #endif
shintamainjp 0:7147d6024de8 137