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1 | /* This file is part of the Linux Trace Toolkit viewer |
2 | * Copyright (C) 2003-2004 Michel Dagenais |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License Version 2 as |
6 | * published by the Free Software Foundation; |
7 | * |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
11 | * GNU General Public License for more details. |
12 | * |
13 | * You should have received a copy of the GNU General Public License |
14 | * along with this program; if not, write to the Free Software |
15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
16 | * MA 02111-1307, USA. |
17 | */ |
18 | |
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19 | |
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20 | #include <popt.h> |
21 | #include <glib.h> |
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22 | #include <lttv/option.h> |
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23 | |
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24 | #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format) |
25 | #define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format) |
26 | |
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27 | typedef struct _LttvOption { |
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28 | char *long_name; |
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29 | char char_name; |
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30 | char *description; |
31 | char *arg_description; |
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32 | LttvOptionType t; |
33 | gpointer p; |
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34 | LttvOptionHook hook; |
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35 | gpointer hook_data; |
36 | } LttvOption; |
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37 | |
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38 | GHashTable *options; |
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39 | |
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40 | |
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41 | static void |
42 | list_options(gpointer key, gpointer value, gpointer user_data) |
43 | { |
44 | g_ptr_array_add((GPtrArray *)user_data, value); |
45 | } |
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46 | |
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47 | |
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48 | static void |
49 | free_option(LttvOption *option) |
50 | { |
51 | g_free(option->long_name); |
52 | g_free(option->description); |
53 | g_free(option->arg_description); |
54 | g_free(option); |
55 | } |
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56 | |
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57 | |
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58 | void lttv_option_init(int argc, char **argv) |
59 | { |
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60 | g_info("Init option.c"); |
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61 | options = g_hash_table_new(g_str_hash, g_str_equal); |
62 | } |
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63 | |
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64 | |
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65 | void lttv_option_destroy() |
66 | { |
67 | LttvOption option; |
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68 | |
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69 | GPtrArray *list = g_ptr_array_new(); |
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70 | |
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71 | int i; |
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72 | |
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73 | g_info("Destroy option.c"); |
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74 | g_hash_table_foreach(options, list_options, list); |
75 | g_hash_table_destroy(options); |
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76 | |
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77 | for(i = 0 ; i < list->len ; i++) { |
78 | free_option((LttvOption *)list->pdata[i]); |
79 | } |
80 | g_ptr_array_free(list, TRUE); |
81 | } |
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82 | |
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83 | |
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84 | void lttv_option_add(const char *long_name, const char char_name, |
85 | const char *description, const char *arg_description, |
86 | const LttvOptionType t, void *p, |
87 | const LttvOptionHook h, void *hook_data) |
88 | { |
89 | LttvOption *option; |
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90 | |
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91 | g_info("Add option %s", long_name); |
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92 | if(g_hash_table_lookup(options, long_name) != NULL) { |
93 | g_warning("duplicate option"); |
94 | return; |
95 | } |
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96 | |
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97 | option = g_new(LttvOption, 1); |
98 | option->long_name = g_strdup(long_name); |
99 | option->char_name = char_name; |
100 | option->description = g_strdup(description); |
101 | option->arg_description = g_strdup(arg_description); |
102 | option->t = t; |
103 | option->p = p; |
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104 | option->hook = h; |
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105 | option->hook_data = hook_data; |
106 | g_hash_table_insert(options, option->long_name, option); |
107 | } |
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108 | |
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109 | |
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110 | void |
111 | lttv_option_remove(const char *long_name) |
112 | { |
113 | LttvOption *option = g_hash_table_lookup(options, long_name); |
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114 | |
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115 | g_info("Remove option %s", long_name); |
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116 | if(option == NULL) { |
117 | g_warning("trying to remove unknown option %s", long_name); |
118 | return; |
119 | } |
120 | g_hash_table_remove(options, long_name); |
121 | free_option(option); |
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122 | } |
123 | |
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124 | |
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125 | static int poptToLTT[] = { |
126 | POPT_ARG_NONE, POPT_ARG_STRING, POPT_ARG_INT, POPT_ARG_LONG |
127 | }; |
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128 | |
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129 | static struct poptOption endOption = { NULL, '\0', 0, NULL, 0}; |
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130 | |
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131 | |
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132 | static void |
133 | build_popts(GPtrArray **plist, struct poptOption **ppopts, poptContext *pc, |
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134 | int argc, char **argv) |
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135 | { |
136 | LttvOption *option; |
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137 | |
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138 | GPtrArray *list; |
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139 | |
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140 | struct poptOption *popts; |
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141 | |
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142 | poptContext c; |
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143 | |
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144 | guint i; |
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145 | |
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146 | list = g_ptr_array_new(); |
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147 | |
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148 | g_hash_table_foreach(options, list_options, list); |
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149 | |
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150 | /* Build a popt options array from our list */ |
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151 | |
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152 | popts = g_new(struct poptOption, list->len + 1); |
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153 | |
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154 | for(i = 0 ; i < list->len ; i++) { |
155 | option = (LttvOption *)list->pdata[i]; |
156 | popts[i].longName = option->long_name; |
157 | popts[i].shortName = option->char_name; |
158 | popts[i].descrip = option->description; |
159 | popts[i].argDescrip = option->arg_description; |
160 | popts[i].argInfo = poptToLTT[option->t]; |
161 | popts[i].arg = option->p; |
162 | popts[i].val = i + 1; |
163 | } |
164 | |
165 | /* Terminate the array for popt and create the context */ |
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166 | |
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167 | popts[list->len] = endOption; |
168 | c = poptGetContext(argv[0], argc, (const char**)argv, popts, 0); |
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169 | |
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170 | *plist = list; |
171 | *ppopts = popts; |
172 | *pc = c; |
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173 | } |
174 | |
175 | |
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176 | static void |
177 | destroy_popts(GPtrArray **plist, struct poptOption **ppopts, poptContext *pc) |
178 | { |
179 | g_ptr_array_free(*plist, TRUE); *plist = NULL; |
180 | g_free(*ppopts); *ppopts = NULL; |
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181 | poptFreeContext(*pc); |
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182 | } |
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183 | |
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184 | |
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185 | void lttv_option_parse(int argc, char **argv) |
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186 | { |
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187 | GPtrArray *list; |
188 | |
189 | LttvOption *option; |
190 | |
191 | int i, rc, first_arg; |
192 | |
193 | struct poptOption *popts; |
194 | |
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195 | poptContext c; |
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196 | |
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197 | i = 0; |
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198 | |
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199 | first_arg = 0; |
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200 | |
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201 | build_popts(&list, &popts, &c, argc, argv); |
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202 | |
203 | /* Parse options while not end of options event */ |
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204 | |
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205 | while((rc = poptGetNextOpt(c)) != -1) { |
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206 | |
207 | /* The option was recognized and the rc value returned is the argument |
208 | position in the array. Call the associated hook if present. */ |
209 | |
210 | if(rc > 0) { |
211 | option = (LttvOption *)(list->pdata[rc - 1]); |
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212 | g_info("Option %s encountered", option->long_name); |
213 | if(option->hook != NULL) { |
214 | g_info("Option %s hook called", option->long_name); |
215 | option->hook(option->hook_data); |
216 | } |
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217 | i++; |
218 | } |
219 | |
220 | else if(rc == POPT_ERROR_BADOPT && i != first_arg) { |
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221 | g_info("Option %s not recognized, rescan options with new additions", |
222 | poptBadOption(c,0)); |
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223 | |
224 | /* Perhaps this option is newly added, restart parsing */ |
225 | |
226 | destroy_popts(&list, &popts, &c); |
227 | build_popts(&list, &popts, &c, argc, argv); |
228 | |
229 | /* Get back to the same argument */ |
230 | |
231 | first_arg = i; |
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232 | for(i = 0; i < first_arg; i++) { |
233 | rc = poptGetNextOpt(c); |
234 | option = (LttvOption *)(list->pdata[rc - 1]); |
235 | g_info("Option %s rescanned, skipped", option->long_name); |
236 | } |
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237 | } |
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238 | |
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239 | else { |
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240 | |
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241 | /* The option has some error and it is not because this is a newly |
242 | added option not recognized. */ |
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243 | |
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244 | g_error("option %s: %s", poptBadOption(c,0), poptStrerror(rc)); |
245 | break; |
246 | } |
247 | |
248 | } |
249 | |
250 | destroy_popts(&list, &popts, &c); |
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251 | } |
252 | |
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253 | static void show_help(LttvOption *option) |
254 | { |
255 | printf("--%s -%c argument: %s\n" , option->long_name, |
256 | option->char_name, |
257 | option->arg_description); |
258 | printf(" %s\n" , option->description); |
259 | |
260 | } |
261 | |
262 | void lttv_option_show_help(void) |
263 | { |
264 | LttvOption option; |
265 | |
266 | GPtrArray *list = g_ptr_array_new(); |
267 | |
268 | int i; |
269 | |
270 | g_hash_table_foreach(options, list_options, list); |
271 | |
272 | printf("Built-in commands available:\n"); |
273 | printf("\n"); |
274 | |
275 | for(i = 0 ; i < list->len ; i++) { |
276 | show_help((LttvOption *)list->pdata[i]); |
277 | } |
278 | g_ptr_array_free(list, TRUE); |
279 | |
280 | |
281 | } |
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282 | |