dynwatch

annotate config_parser.c @ 0:ce3c5e4c75bf

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dynwatch DynDNS updater for windows
author John Tsiombikas <nuclear@siggraph.org>
date Wed, 18 May 2011 05:53:29 +0300
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nuclear@0 1 /*
nuclear@0 2 This file is part of dynwatch, a win32 system tray applet which
nuclear@0 3 updates automatically the dyndns entry of quake.gr.
nuclear@0 4
nuclear@0 5 Copyright (c) 2005 John Tsiombikas <nuclear@siggraph.org>
nuclear@0 6
nuclear@0 7 This program is free software; you can redistribute it and/or modify
nuclear@0 8 it under the terms of the GNU General Public License as published by
nuclear@0 9 the Free Software Foundation; either version 2 of the License, or
nuclear@0 10 (at your option) any later version.
nuclear@0 11
nuclear@0 12 This program is distributed in the hope that it will be useful,
nuclear@0 13 but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@0 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
nuclear@0 15 GNU General Public License for more details.
nuclear@0 16
nuclear@0 17 You should have received a copy of the GNU General Public License
nuclear@0 18 along with this program; if not, write to the Free Software
nuclear@0 19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
nuclear@0 20 */
nuclear@0 21 #include <stdio.h>
nuclear@0 22 #include <string.h>
nuclear@0 23 #include <stdlib.h>
nuclear@0 24 #include <ctype.h>
nuclear@0 25 #include "config_parser.h"
nuclear@0 26
nuclear@0 27 /* state variables */
nuclear@0 28 static char sym_assign = '=';
nuclear@0 29 static char sym_comment = ';';
nuclear@0 30 static char max_line_len = 100;
nuclear@0 31 static char seperators[257] = " \t";
nuclear@0 32 static struct ConfigOption cfg_opt;
nuclear@0 33
nuclear@0 34 static char *config_file, *cfgptr;
nuclear@0 35
nuclear@0 36 void SetParserState(enum ParserState state, int value) {
nuclear@0 37 switch(state) {
nuclear@0 38 case PS_AssignmentSymbol:
nuclear@0 39 sym_assign = (char)value;
nuclear@0 40 break;
nuclear@0 41
nuclear@0 42 case PS_CommentSymbol:
nuclear@0 43 sym_comment = (char)value;
nuclear@0 44 break;
nuclear@0 45
nuclear@0 46 case PS_MaxLineLen:
nuclear@0 47 max_line_len = value;
nuclear@0 48 break;
nuclear@0 49
nuclear@0 50 case PS_Seperators:
nuclear@0 51 strncpy(seperators, (char*)value, 257);
nuclear@0 52 break;
nuclear@0 53 }
nuclear@0 54 }
nuclear@0 55
nuclear@0 56 int LoadConfigFile(const char *fname) {
nuclear@0 57 FILE *fp;
nuclear@0 58 int fsize;
nuclear@0 59 char *temp;
nuclear@0 60
nuclear@0 61 if(!fname) return -1;
nuclear@0 62 if(!(fp = fopen(fname, "r"))) return -1;
nuclear@0 63
nuclear@0 64 fseek(fp, 0, SEEK_END);
nuclear@0 65 fsize = ftell(fp);
nuclear@0 66 fseek(fp, 0, SEEK_SET);
nuclear@0 67
nuclear@0 68 if(!(temp = realloc(config_file, fsize))) return -1;
nuclear@0 69 config_file = temp;
nuclear@0 70
nuclear@0 71 cfgptr = config_file;
nuclear@0 72 temp = malloc(max_line_len + 1);
nuclear@0 73 while(fgets(temp, max_line_len, fp)) {
nuclear@0 74 char *ptr = temp;
nuclear@0 75
nuclear@0 76 if(*ptr == '\n') continue; /* kill empty lines, they irritate the parser */
nuclear@0 77
nuclear@0 78 while(ptr && *ptr && *ptr != sym_comment) {
nuclear@0 79 if(!strchr(seperators, *ptr)) { /* not a seperator */
nuclear@0 80 *cfgptr++ = *ptr;
nuclear@0 81 }
nuclear@0 82 ptr++;
nuclear@0 83 }
nuclear@0 84
nuclear@0 85 if(*ptr == sym_comment && ptr != temp) {
nuclear@0 86 *cfgptr++ = '\n';
nuclear@0 87 }
nuclear@0 88 }
nuclear@0 89
nuclear@0 90 *cfgptr = 0;
nuclear@0 91
nuclear@0 92 memset(&cfg_opt, 0, sizeof(struct ConfigOption));
nuclear@0 93 cfgptr = config_file;
nuclear@0 94 free(temp);
nuclear@0 95 return 0;
nuclear@0 96 }
nuclear@0 97
nuclear@0 98 const struct ConfigOption *GetNextOption() {
nuclear@0 99 char *tmpbuf = malloc(max_line_len + 1);
nuclear@0 100 char *ptr = tmpbuf;
nuclear@0 101
nuclear@0 102 if(!(*cfgptr)) {
nuclear@0 103 free(tmpbuf);
nuclear@0 104 return 0;
nuclear@0 105 }
nuclear@0 106
nuclear@0 107 while(*cfgptr != '\n') {
nuclear@0 108 *ptr++ = *cfgptr++;
nuclear@0 109 }
nuclear@0 110 *ptr = 0;
nuclear@0 111 cfgptr++;
nuclear@0 112
nuclear@0 113 if(!(ptr = strchr(tmpbuf, sym_assign))) {
nuclear@0 114 free(tmpbuf);
nuclear@0 115 return 0;
nuclear@0 116 }
nuclear@0 117 *ptr++ = 0;
nuclear@0 118
nuclear@0 119 cfg_opt.flags = 0;
nuclear@0 120
nuclear@0 121 cfg_opt.option = realloc(cfg_opt.option, strlen(tmpbuf) + 1);
nuclear@0 122 strcpy(cfg_opt.option, tmpbuf);
nuclear@0 123
nuclear@0 124 cfg_opt.str_value = realloc(cfg_opt.str_value, strlen(ptr) + 1);
nuclear@0 125 strcpy(cfg_opt.str_value, ptr);
nuclear@0 126
nuclear@0 127 if(isdigit(cfg_opt.str_value[0])) {
nuclear@0 128 cfg_opt.flags |= CFGOPT_INT;
nuclear@0 129 cfg_opt.int_value = atoi(cfg_opt.str_value);
nuclear@0 130 cfg_opt.flt_value = atof(cfg_opt.str_value);
nuclear@0 131 }
nuclear@0 132
nuclear@0 133 free(tmpbuf);
nuclear@0 134 return &cfg_opt;
nuclear@0 135 }
nuclear@0 136
nuclear@0 137 void DestroyConfigParser() {
nuclear@0 138 if(cfg_opt.str_value) free(cfg_opt.str_value);
nuclear@0 139 if(cfg_opt.option) free(cfg_opt.option);
nuclear@0 140 if(config_file) free(config_file);
nuclear@0 141 }