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-rw-r--r--movement/lib/morsecalc/mc.c66
1 files changed, 0 insertions, 66 deletions
diff --git a/movement/lib/morsecalc/mc.c b/movement/lib/morsecalc/mc.c
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--- a/movement/lib/morsecalc/mc.c
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-/*
- * MIT License
- *
- * Copyright (c) 2023 Christian Chapman
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-
-#include <string.h>
-#include "mc.h"
-
-/* mc_reset Initialize or reset an MC buffer
- * Input: mc = location of buffer to reset
- */
-void mc_reset(mc_state_t * mc) {
- memset(mc->b, '\0', BUFFLEN*sizeof(mc->b[0]));
- mc->bidx = 0;
- return;
- return;
-}
-
-/* mc_input Read an input into a morse code buffer
- * Input: mc = buffer to read into
- * c = character to read into buffer ('.' or '-', ignored otherwise).
- * If the buffer is full, reset it instead of entering the new character.
- */
-void mc_input(mc_state_t * mc, char c) {
- if(mc->bidx >= BUFFLEN) mc_reset(mc);
- else if( ('.' == c) || ('-' == c) ) {
- mc->b[mc->bidx] = c;
- mc->bidx++;
- }
- return;
-}
-
-/* mc_dec Decode a Morse code character (descend MC_DEC_KEY[])
- * Input: b = BUFFLEN-length char array with '.'s and '-'s
- * Output: c = Character b represents, or '\0' if not a Morse code.
- */
-char mc_dec(char b[BUFFLEN]) {
- uint8_t pos = 1; // Binary tree position ('.'=0; '-'=1)
- for(uint8_t idx=0; idx<BUFFLEN; idx++) {
- if('.' == b[idx]) pos = 2*pos; // Descend in . direction
- else if('-' == b[idx]) pos = 2*pos+1; // Descend in - direction
- else break; // End of morse code segment; finished descending
- }
- return MC_DEC_KEY[pos-1];
-}
-