peter brier / Mbed 2 deprecated laos_server_v1

Laser cutter software

Dependencies:   EthernetNetIf mbed SDFileSystem

ConfigFile/ConfigFile.cpp@0:18ead85c200b, 2011-08-11 (annotated)

Committer:
pbrier
Date:
Thu Aug 11 09:33:15 2011 +0000
Revision:
0:18ead85c200b
Laos server

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pbrier 0:18ead85c200b 1 /*
pbrier 0:18ead85c200b 2 * ConfigFile.cpp
pbrier 0:18ead85c200b 3 * Simple Config file reader class
pbrier 0:18ead85c200b 4 *
pbrier 0:18ead85c200b 5 * Copyright (c) 2011 Peter Brier
pbrier 0:18ead85c200b 6 *
pbrier 0:18ead85c200b 7 * This file is part of the LaOS project (see: http://wiki.protospace.nl/index.php/LaOS)
pbrier 0:18ead85c200b 8 *
pbrier 0:18ead85c200b 9 * LaOS is free software: you can redistribute it and/or modify
pbrier 0:18ead85c200b 10 * it under the terms of the GNU General Public License as published by
pbrier 0:18ead85c200b 11 * the Free Software Foundation, either version 3 of the License, or
pbrier 0:18ead85c200b 12 * (at your option) any later version.
pbrier 0:18ead85c200b 13 *
pbrier 0:18ead85c200b 14 * LaOS is distributed in the hope that it will be useful,
pbrier 0:18ead85c200b 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
pbrier 0:18ead85c200b 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
pbrier 0:18ead85c200b 17 * GNU General Public License for more details.
pbrier 0:18ead85c200b 18 *
pbrier 0:18ead85c200b 19 * You should have received a copy of the GNU General Public License
pbrier 0:18ead85c200b 20 * along with LaOS. If not, see <http://www.gnu.org/licenses/>.
pbrier 0:18ead85c200b 21 *
pbrier 0:18ead85c200b 22 */
pbrier 0:18ead85c200b 23 #include "ConfigFile.h"
pbrier 0:18ead85c200b 24
pbrier 0:18ead85c200b 25 // Make new config file object
pbrier 0:18ead85c200b 26 ConfigFile::ConfigFile(char *file)
pbrier 0:18ead85c200b 27 {
pbrier 0:18ead85c200b 28 // printf("ConfigFile(%s)\n\r", file);
pbrier 0:18ead85c200b 29 fp = fopen(file,"rb");
pbrier 0:18ead85c200b 30 }
pbrier 0:18ead85c200b 31
pbrier 0:18ead85c200b 32 // Destroy a config file (closes the file handle)
pbrier 0:18ead85c200b 33 ConfigFile::~ConfigFile()
pbrier 0:18ead85c200b 34 {
pbrier 0:18ead85c200b 35 // printf("~ConfigFile()\n\r");
pbrier 0:18ead85c200b 36 if ( fp != NULL )
pbrier 0:18ead85c200b 37 fclose(fp);
pbrier 0:18ead85c200b 38 }
pbrier 0:18ead85c200b 39
pbrier 0:18ead85c200b 40 // Read value
pbrier 0:18ead85c200b 41 bool ConfigFile::Value(char *key, char *value, size_t maxlen, char *def)
pbrier 0:18ead85c200b 42 {
pbrier 0:18ead85c200b 43 int m=0,n=0,c,s=0;
pbrier 0:18ead85c200b 44 if (fp == NULL)
pbrier 0:18ead85c200b 45 {
pbrier 0:18ead85c200b 46 strncpy(value, def, maxlen);
pbrier 0:18ead85c200b 47 return false;
pbrier 0:18ead85c200b 48 }
pbrier 0:18ead85c200b 49 // printf("Value()\n\r");
pbrier 0:18ead85c200b 50 n = strlen(key);
pbrier 0:18ead85c200b 51 fseek(fp, 0L, SEEK_SET);
pbrier 0:18ead85c200b 52 while( s != 99 )
pbrier 0:18ead85c200b 53 {
pbrier 0:18ead85c200b 54 c = fgetc(fp);
pbrier 0:18ead85c200b 55 if ( c == EOF )
pbrier 0:18ead85c200b 56 break;
pbrier 0:18ead85c200b 57 // printf("%d: '%c'\n\r", s, c);
pbrier 0:18ead85c200b 58 switch( s )// sate machine
pbrier 0:18ead85c200b 59 {
pbrier 0:18ead85c200b 60 case 0: // (re) start: note: no break; fall through to case 1
pbrier 0:18ead85c200b 61 m=0;
pbrier 0:18ead85c200b 62 s=1;
pbrier 0:18ead85c200b 63 case 1: // read key, skip spaces
pbrier 0:18ead85c200b 64 if ( c == key[m] )
pbrier 0:18ead85c200b 65 m++;
pbrier 0:18ead85c200b 66 else
pbrier 0:18ead85c200b 67 s = 0;
pbrier 0:18ead85c200b 68 if ( c == ';' )
pbrier 0:18ead85c200b 69 s = 10;
pbrier 0:18ead85c200b 70 else if ( c == ' ' || c == '\t' || c == '\n' || c == '\r')
pbrier 0:18ead85c200b 71 {
pbrier 0:18ead85c200b 72 if ( n == m ) // key found
pbrier 0:18ead85c200b 73 {
pbrier 0:18ead85c200b 74 s = 2;
pbrier 0:18ead85c200b 75 m = 0;
pbrier 0:18ead85c200b 76 }
pbrier 0:18ead85c200b 77 else
pbrier 0:18ead85c200b 78 s = 0;
pbrier 0:18ead85c200b 79 }
pbrier 0:18ead85c200b 80 break;
pbrier 0:18ead85c200b 81 case 2: // key matched, skip whitepaces upto the first char
pbrier 0:18ead85c200b 82 if ( c == ';' ) s = 99;
pbrier 0:18ead85c200b 83 else if ( c != ' ' && c != '\t' )
pbrier 0:18ead85c200b 84 {
pbrier 0:18ead85c200b 85 s = 3;
pbrier 0:18ead85c200b 86 m = 1;
pbrier 0:18ead85c200b 87 if ( m < maxlen)
pbrier 0:18ead85c200b 88 *value++ = c;
pbrier 0:18ead85c200b 89 }
pbrier 0:18ead85c200b 90 break;
pbrier 0:18ead85c200b 91
pbrier 0:18ead85c200b 92 case 3: // copy value content, upto eol or comment
pbrier 0:18ead85c200b 93 if ( m == maxlen || c == '\n' || c == '\r' || c == ';' )
pbrier 0:18ead85c200b 94 s = 99;
pbrier 0:18ead85c200b 95 else
pbrier 0:18ead85c200b 96 {
pbrier 0:18ead85c200b 97 m++;
pbrier 0:18ead85c200b 98 *value++ = c;
pbrier 0:18ead85c200b 99 }
pbrier 0:18ead85c200b 100 break;
pbrier 0:18ead85c200b 101 case 10: // skip comments, upto eol or eof
pbrier 0:18ead85c200b 102 if ( c == '\n' || c == '\r' ) s = 0;
pbrier 0:18ead85c200b 103 break;
pbrier 0:18ead85c200b 104 }
pbrier 0:18ead85c200b 105 }
pbrier 0:18ead85c200b 106 if ( s == 99 && m > 1) // key found, and value assigned
pbrier 0:18ead85c200b 107 {
pbrier 0:18ead85c200b 108 *value = 0; // terminate string
pbrier 0:18ead85c200b 109 return true;
pbrier 0:18ead85c200b 110 }
pbrier 0:18ead85c200b 111 else
pbrier 0:18ead85c200b 112 {
pbrier 0:18ead85c200b 113 strncpy(value, def, maxlen);
pbrier 0:18ead85c200b 114 return false;
pbrier 0:18ead85c200b 115 }
pbrier 0:18ead85c200b 116 }
pbrier 0:18ead85c200b 117
pbrier 0:18ead85c200b 118 // Read int value
pbrier 0:18ead85c200b 119 bool ConfigFile::Value(char *key, int *value, int def)
pbrier 0:18ead85c200b 120 {
pbrier 0:18ead85c200b 121 char val[16];
pbrier 0:18ead85c200b 122 bool b = Value(key, val, 12, "");
pbrier 0:18ead85c200b 123 if ( b )
pbrier 0:18ead85c200b 124 *value = atoi(val);
pbrier 0:18ead85c200b 125 else
pbrier 0:18ead85c200b 126 {
pbrier 0:18ead85c200b 127 *value = def;
pbrier 0:18ead85c200b 128 }
pbrier 0:18ead85c200b 129 return b;
pbrier 0:18ead85c200b 130 }