868
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1 /*
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2 * help.c -- Help command
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3 *
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4 * Copyright (C) 2006 Mikael Berthe <bmikael@lists.lilotux.net>
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5 *
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6 * This program is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or (at
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9 * your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful, but
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12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program; if not, write to the Free Software
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18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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19 * USA
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20 */
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21
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22 #include <stdio.h>
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23 #include <stdlib.h>
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24 #include <string.h>
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25 #include <ctype.h>
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26 #include <glib.h>
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27
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28 #include "settings.h"
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29 #include "logprint.h"
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30 #include "utils.h"
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31
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32 #define DEFAULT_LANG "en"
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33
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34 // get_lang()
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35 // Return the language code string (a 2-letters string).
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36 static const char *get_lang(void) {
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37 static const char *lang_str = DEFAULT_LANG;
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38 #ifdef DATA_DIR
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39 static char lang[3];
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40 const char *opt_l;
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41 opt_l = settings_opt_get("lang");
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42 if (opt_l && strlen(opt_l) == 2 && isalpha(opt_l[0]) && isalpha(opt_l[1])) {
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43 strncpy(lang, opt_l, sizeof(lang));
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44 mc_strtolower(lang);
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45 lang_str = lang;
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46 }
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47 #endif /* DATA_DIR */
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48 return lang_str;
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49 }
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50
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51 // help_process(string)
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52 // Display help about the "string" command.
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53 // If string is null, display general help.
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54 // Return 0 in case of success.
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55 int help_process(char *string)
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56 {
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57 #ifndef DATA_DIR
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58 scr_LogPrint(LPRINT_NORMAL, "Help isn't available.");
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59 return -1;
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60 #else
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61 const char *lang;
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62 FILE *fp;
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63 char *helpfiles_dir, *filename;
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64 char *data;
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65 const int datasize = 4096;
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66 char *p;
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67
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68 // Check string is ok
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69 for (p = string; p && *p; p++) {
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70 if (!isalnum(*p) && *p != '_' && *p != '-') {
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71 scr_LogPrint(LPRINT_NORMAL, "Cannot find help (invalid keyword).");
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72 return 1;
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73 }
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74 }
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75
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76 // Look for help file
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77 lang = get_lang();
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78 helpfiles_dir = g_strdup_printf("%s/mcabber/help", DATA_DIR);
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79 if (string && *string) {
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80 p = g_strdup(string);
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81 mc_strtolower(p);
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82 filename = g_strdup_printf("%s/%s/hlp_%s.txt", helpfiles_dir, lang, p);
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83 g_free(p);
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84 } else
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85 filename = g_strdup_printf("%s/%s/hlp.txt", helpfiles_dir, lang);
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86
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87 fp = fopen(filename, "r");
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88 g_free(filename);
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89 g_free(helpfiles_dir);
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90
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91 if (!fp) {
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92 scr_LogPrint(LPRINT_NORMAL, "No help found.");
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93 return -1;
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94 }
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95
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96 data = g_new(char, datasize);
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97 while (!feof(fp)) {
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98 if (fgets(data, datasize, fp) == NULL) break;
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99 // Strip trailing newline
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100 for (p = data; *p; p++) ;
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101 if (p > data)
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102 p--;
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103 if (*p == '\n' || *p == '\r')
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104 *p = '\0';
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105 // Displaty the help line
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106 scr_LogPrint(LPRINT_NORMAL, "%s", data);
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107 }
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108 fclose(fp);
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109 g_free(data);
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110
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111 return 0;
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112 #endif /* DATA_DIR */
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113 }
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114
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115
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116 /* vim: set expandtab cindent cinoptions=>2\:2(0: For Vim users... */
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