Have you tried to develop a key input feature on your small embedded platform with a serial input? It is not so easy to implement correctly because the input methodology is using a complicated protocol known as VT100. In my recent project "Natural Tiny Shell (NT-Shell)" provides VT100 compatible terminal control features for small embedded systems. However, the middleware is still large for small embedded processors such as 8-bit MCUs, 16-bit MCUs and also for small 32-bit MCUs like Cortex-M0. This "MicroShell" middleware provides a minimal terminal control for the platforms.
util/msopt.c@0:e91b984e285d, 2017-02-05 (annotated)
- Committer:
- shintamainjp
- Date:
- Sun Feb 05 03:55:01 2017 +0000
- Revision:
- 0:e91b984e285d
first commitment.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
shintamainjp | 0:e91b984e285d | 1 | /** |
shintamainjp | 0:e91b984e285d | 2 | * @file msopt.c |
shintamainjp | 0:e91b984e285d | 3 | * @author Shinichiro Nakamura (CuBeatSystems) |
shintamainjp | 0:e91b984e285d | 4 | * =============================================================== |
shintamainjp | 0:e91b984e285d | 5 | * MicroShell (Version 0.0.1) |
shintamainjp | 0:e91b984e285d | 6 | * Copyright (c) 2016, 2017 Shinichiro Nakamura (CuBeatSystems) |
shintamainjp | 0:e91b984e285d | 7 | * =============================================================== |
shintamainjp | 0:e91b984e285d | 8 | * The MIT License : https://opensource.org/licenses/MIT |
shintamainjp | 0:e91b984e285d | 9 | * |
shintamainjp | 0:e91b984e285d | 10 | * Copyright (c) 2016, 2017 Shinichiro Nakamura (CuBeatSystems) |
shintamainjp | 0:e91b984e285d | 11 | * |
shintamainjp | 0:e91b984e285d | 12 | * Permission is hereby granted, free of charge, to any person |
shintamainjp | 0:e91b984e285d | 13 | * obtaining a copy of this software and associated documentation |
shintamainjp | 0:e91b984e285d | 14 | * files (the "Software"), to deal in the Software without |
shintamainjp | 0:e91b984e285d | 15 | * restriction, including without limitation the rights to use, |
shintamainjp | 0:e91b984e285d | 16 | * copy, modify, merge, publish, distribute, sublicense, and/or |
shintamainjp | 0:e91b984e285d | 17 | * sell copies of the Software, and to permit persons to whom the |
shintamainjp | 0:e91b984e285d | 18 | * Software is furnished to do so, subject to the following |
shintamainjp | 0:e91b984e285d | 19 | * conditions: |
shintamainjp | 0:e91b984e285d | 20 | * |
shintamainjp | 0:e91b984e285d | 21 | * The above copyright notice and this permission notice shall be |
shintamainjp | 0:e91b984e285d | 22 | * included in all copies or substantial portions of the Software. |
shintamainjp | 0:e91b984e285d | 23 | * |
shintamainjp | 0:e91b984e285d | 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
shintamainjp | 0:e91b984e285d | 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
shintamainjp | 0:e91b984e285d | 26 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
shintamainjp | 0:e91b984e285d | 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
shintamainjp | 0:e91b984e285d | 28 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
shintamainjp | 0:e91b984e285d | 29 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
shintamainjp | 0:e91b984e285d | 30 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
shintamainjp | 0:e91b984e285d | 31 | * OTHER DEALINGS IN THE SOFTWARE. |
shintamainjp | 0:e91b984e285d | 32 | */ |
shintamainjp | 0:e91b984e285d | 33 | |
shintamainjp | 0:e91b984e285d | 34 | #include "msopt.h" |
shintamainjp | 0:e91b984e285d | 35 | |
shintamainjp | 0:e91b984e285d | 36 | #define INITCODE (0x248e97c0) |
shintamainjp | 0:e91b984e285d | 37 | #define IS_WHITE_SPACE(C) (((C) == ' ') || ((C) == '\t') || ((C) == '\r') || ((C) == '\n')) |
shintamainjp | 0:e91b984e285d | 38 | |
shintamainjp | 0:e91b984e285d | 39 | static char *skip_white_space(char *text) |
shintamainjp | 0:e91b984e285d | 40 | { |
shintamainjp | 0:e91b984e285d | 41 | char *p = text; |
shintamainjp | 0:e91b984e285d | 42 | while (IS_WHITE_SPACE(*p)) { |
shintamainjp | 0:e91b984e285d | 43 | if (*p == 0) { |
shintamainjp | 0:e91b984e285d | 44 | break; |
shintamainjp | 0:e91b984e285d | 45 | } |
shintamainjp | 0:e91b984e285d | 46 | p++; |
shintamainjp | 0:e91b984e285d | 47 | } |
shintamainjp | 0:e91b984e285d | 48 | return p; |
shintamainjp | 0:e91b984e285d | 49 | } |
shintamainjp | 0:e91b984e285d | 50 | |
shintamainjp | 0:e91b984e285d | 51 | static char *skip_text_string(char *text, int *length) |
shintamainjp | 0:e91b984e285d | 52 | { |
shintamainjp | 0:e91b984e285d | 53 | char *p = text; |
shintamainjp | 0:e91b984e285d | 54 | int count = 0; |
shintamainjp | 0:e91b984e285d | 55 | while (!IS_WHITE_SPACE(*p)) { |
shintamainjp | 0:e91b984e285d | 56 | if (*p == 0) { |
shintamainjp | 0:e91b984e285d | 57 | break; |
shintamainjp | 0:e91b984e285d | 58 | } |
shintamainjp | 0:e91b984e285d | 59 | p++; |
shintamainjp | 0:e91b984e285d | 60 | count++; |
shintamainjp | 0:e91b984e285d | 61 | } |
shintamainjp | 0:e91b984e285d | 62 | *length = count; |
shintamainjp | 0:e91b984e285d | 63 | return p; |
shintamainjp | 0:e91b984e285d | 64 | } |
shintamainjp | 0:e91b984e285d | 65 | |
shintamainjp | 0:e91b984e285d | 66 | MSOPT_RESULT msopt_init(MSOPT *handle, char *text) |
shintamainjp | 0:e91b984e285d | 67 | { |
shintamainjp | 0:e91b984e285d | 68 | char *src = text; |
shintamainjp | 0:e91b984e285d | 69 | char *des = handle->argv; |
shintamainjp | 0:e91b984e285d | 70 | while (*src) { |
shintamainjp | 0:e91b984e285d | 71 | *des++ = *src++; |
shintamainjp | 0:e91b984e285d | 72 | } |
shintamainjp | 0:e91b984e285d | 73 | *des = 0; |
shintamainjp | 0:e91b984e285d | 74 | handle->argc = 0; |
shintamainjp | 0:e91b984e285d | 75 | char *p = handle->argv; |
shintamainjp | 0:e91b984e285d | 76 | while (1) { |
shintamainjp | 0:e91b984e285d | 77 | if (handle->argc >= MSCONF_MAX_INPUT_ARGS) { |
shintamainjp | 0:e91b984e285d | 78 | return MSOPT_RESULT_ERROR_TOO_MUCH_ARGUMENTS; |
shintamainjp | 0:e91b984e285d | 79 | } |
shintamainjp | 0:e91b984e285d | 80 | p = skip_white_space(p); |
shintamainjp | 0:e91b984e285d | 81 | if (*p == 0) { |
shintamainjp | 0:e91b984e285d | 82 | break; |
shintamainjp | 0:e91b984e285d | 83 | } |
shintamainjp | 0:e91b984e285d | 84 | handle->info[handle->argc].head = p; |
shintamainjp | 0:e91b984e285d | 85 | p = skip_text_string(p, &(handle->info[handle->argc].length)); |
shintamainjp | 0:e91b984e285d | 86 | handle->argc++; |
shintamainjp | 0:e91b984e285d | 87 | } |
shintamainjp | 0:e91b984e285d | 88 | handle->initcode = INITCODE; |
shintamainjp | 0:e91b984e285d | 89 | return MSOPT_RESULT_OK; |
shintamainjp | 0:e91b984e285d | 90 | } |
shintamainjp | 0:e91b984e285d | 91 | |
shintamainjp | 0:e91b984e285d | 92 | MSOPT_RESULT msopt_get_argc(MSOPT *handle, int *argc) |
shintamainjp | 0:e91b984e285d | 93 | { |
shintamainjp | 0:e91b984e285d | 94 | if (handle->initcode != INITCODE) { |
shintamainjp | 0:e91b984e285d | 95 | *argc = 0; |
shintamainjp | 0:e91b984e285d | 96 | return MSOPT_RESULT_ERROR_ILLEGAL_OBJECT; |
shintamainjp | 0:e91b984e285d | 97 | } |
shintamainjp | 0:e91b984e285d | 98 | *argc = handle->argc; |
shintamainjp | 0:e91b984e285d | 99 | return MSOPT_RESULT_OK; |
shintamainjp | 0:e91b984e285d | 100 | } |
shintamainjp | 0:e91b984e285d | 101 | |
shintamainjp | 0:e91b984e285d | 102 | MSOPT_RESULT msopt_get_argv(MSOPT *handle, int index, char *bufptr, int bufsiz) |
shintamainjp | 0:e91b984e285d | 103 | { |
shintamainjp | 0:e91b984e285d | 104 | *bufptr = 0; |
shintamainjp | 0:e91b984e285d | 105 | if (handle->argc <= index) { |
shintamainjp | 0:e91b984e285d | 106 | return MSOPT_RESULT_ERROR_ILLEGAL_INDEX_NUMBER; |
shintamainjp | 0:e91b984e285d | 107 | } |
shintamainjp | 0:e91b984e285d | 108 | char *src = handle->info[index].head; |
shintamainjp | 0:e91b984e285d | 109 | char *des = bufptr; |
shintamainjp | 0:e91b984e285d | 110 | int i; |
shintamainjp | 0:e91b984e285d | 111 | for (i = 0; i < handle->info[index].length; i++) { |
shintamainjp | 0:e91b984e285d | 112 | if (i >= bufsiz - 1) { |
shintamainjp | 0:e91b984e285d | 113 | *des = 0; |
shintamainjp | 0:e91b984e285d | 114 | return MSOPT_RESULT_ERROR_BUFFER_SIZE; |
shintamainjp | 0:e91b984e285d | 115 | } |
shintamainjp | 0:e91b984e285d | 116 | *des++ = *src++; |
shintamainjp | 0:e91b984e285d | 117 | } |
shintamainjp | 0:e91b984e285d | 118 | *des = 0; |
shintamainjp | 0:e91b984e285d | 119 | return MSOPT_RESULT_OK; |
shintamainjp | 0:e91b984e285d | 120 | } |
shintamainjp | 0:e91b984e285d | 121 | |
shintamainjp | 0:e91b984e285d | 122 |