mirror of
https://gitee.com/mirrors_PX4/PX4-Autopilot.git
synced 2026-06-29 16:40:34 +08:00
Daniel Agar
113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
/****************************************************************************
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*
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* Copyright (C) 2012 PX4 Development Team. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/**
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* @file mixer_load.c
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*
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* Programmable multi-channel mixer library.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <ctype.h>
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#include "mixer_load.h"
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int load_mixer_file(const char *fname, char *buf, unsigned maxlen)
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{
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FILE *fp;
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char line[120];
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/* open the mixer definition file */
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fp = fopen(fname, "r");
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if (fp == nullptr) {
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printf("file not found\n");
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return -1;
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}
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/* read valid lines from the file into a buffer */
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buf[0] = '\0';
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for (;;) {
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/* get a line, bail on error/EOF */
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line[0] = '\0';
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if (fgets(line, sizeof(line), fp) == nullptr) {
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break;
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}
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/* if the line doesn't look like a mixer definition line, skip it */
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if ((strlen(line) < 2) || !isupper(line[0]) || (line[1] != ':')) {
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continue;
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}
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/* compact whitespace in the buffer */
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char *t, *f;
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for (f = line; *f != '\0'; f++) {
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/* scan for space characters */
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if (*f == ' ') {
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/* look for additional spaces */
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t = f + 1;
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while (*t == ' ') {
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t++;
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}
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if (*t == '\0') {
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/* strip trailing whitespace */
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*f = '\0';
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} else if (t > (f + 1)) {
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memmove(f + 1, t, strlen(t) + 1);
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}
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}
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}
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/* if the line is too long to fit in the buffer, bail */
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if ((strlen(line) + strlen(buf) + 1) >= maxlen) {
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printf("line too long\n");
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fclose(fp);
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return -1;
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}
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/* add the line to the buffer */
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strcat(buf, line);
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}
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fclose(fp);
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return 0;
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}
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