| 1 | #include <popt.h> |
| 2 | |
| 3 | #include <lttv/hook.h> |
| 4 | #include "lttv.h" |
| 5 | #include "option.h" |
| 6 | |
| 7 | /* Extensible array of popt command line options. Modules add options as |
| 8 | they are loaded and initialized. */ |
| 9 | |
| 10 | typedef struct _lttv_option { |
| 11 | lttv_option_hook hook; |
| 12 | void *hook_data; |
| 13 | } lttv_option; |
| 14 | |
| 15 | static GArray *lttv_options_command; |
| 16 | |
| 17 | static GArray *lttv_options_command_popt; |
| 18 | |
| 19 | // unneeded static lttv_key *key ; |
| 20 | |
| 21 | static int command_argc; |
| 22 | |
| 23 | static char **command_argv; |
| 24 | |
| 25 | /* Lists of hooks to be called at different places */ |
| 26 | |
| 27 | static lttv_hooks |
| 28 | *hooks_options_before, |
| 29 | *hooks_options_after; |
| 30 | |
| 31 | static gboolean init_done = FALSE; |
| 32 | |
| 33 | void lttv_options_command_parse(void *hook_data, void *call_data); |
| 34 | |
| 35 | |
| 36 | void lttv_option_init(int argc, char **argv) { |
| 37 | |
| 38 | lttv_hooks *hooks_init_after; |
| 39 | |
| 40 | if(init_done) return; |
| 41 | else init_done = TRUE; |
| 42 | |
| 43 | command_argc = argc; |
| 44 | command_argv = argv; |
| 45 | |
| 46 | hooks_options_before = lttv_hooks_new(); |
| 47 | hooks_options_after = lttv_hooks_new(); |
| 48 | |
| 49 | lttv_attributes_set_pointer_pathname(lttv_global_attributes(), |
| 50 | "hooks/options/before", hooks_options_before); |
| 51 | |
| 52 | lttv_attributes_set_pointer_pathname(lttv_global_attributes(), |
| 53 | "hooks/options/after", hooks_options_after); |
| 54 | |
| 55 | lttv_options_command_popt = g_array_new(0,0,sizeof(struct poptOption)); |
| 56 | lttv_options_command = g_array_new(0,0,sizeof(lttv_option)); |
| 57 | |
| 58 | hooks_init_after = lttv_attributes_get_pointer_pathname(lttv_global_attributes(), |
| 59 | "hooks/init/after"); |
| 60 | lttv_hooks_add(hooks_init_after, lttv_options_command_parse, NULL); |
| 61 | |
| 62 | } |
| 63 | |
| 64 | void lttv_option_destroy() { |
| 65 | |
| 66 | struct poptOption *poption; |
| 67 | |
| 68 | int i; |
| 69 | |
| 70 | for(i=0; i < lttv_options_command_popt->len ; i++) { |
| 71 | poption = &g_array_index (lttv_options_command_popt, struct poptOption, i); |
| 72 | |
| 73 | g_free((gpointer)poption->longName); |
| 74 | g_free((gpointer)poption->descrip); |
| 75 | g_free((gpointer)poption->argDescrip); |
| 76 | } |
| 77 | g_array_free(lttv_options_command_popt,TRUE) ; |
| 78 | g_array_free(lttv_options_command,TRUE) ; |
| 79 | |
| 80 | lttv_attributes_set_pointer_pathname(lttv_global_attributes(), |
| 81 | "hooks/options/before", NULL); |
| 82 | |
| 83 | lttv_attributes_set_pointer_pathname(lttv_global_attributes(), |
| 84 | "hooks/options/after", NULL); |
| 85 | |
| 86 | lttv_hooks_destroy(hooks_options_before); |
| 87 | lttv_hooks_destroy(hooks_options_after); |
| 88 | |
| 89 | } |
| 90 | |
| 91 | |
| 92 | static int poptToLTT[] = { |
| 93 | POPT_ARG_NONE, POPT_ARG_STRING, POPT_ARG_INT, POPT_ARG_LONG |
| 94 | }; |
| 95 | |
| 96 | |
| 97 | void lttv_option_add(const char *long_name, const char char_name, |
| 98 | const char *description, const char *argDescription, |
| 99 | const lttv_option_type t, void *p, |
| 100 | const lttv_option_hook h, void *hook_data) |
| 101 | { |
| 102 | struct poptOption poption; |
| 103 | |
| 104 | lttv_option option; |
| 105 | |
| 106 | poption.longName = (char *)g_strdup(long_name); |
| 107 | poption.shortName = char_name; |
| 108 | poption.descrip = (char *)g_strdup(description); |
| 109 | poption.argDescrip = (char *)g_strdup(argDescription); |
| 110 | poption.argInfo = poptToLTT[t]; |
| 111 | poption.arg = p; |
| 112 | poption.val = lttv_options_command->len + 1; |
| 113 | |
| 114 | option.hook = h; |
| 115 | option.hook_data = hook_data; |
| 116 | |
| 117 | g_array_append_val(lttv_options_command_popt,poption); |
| 118 | g_array_append_val(lttv_options_command,option); |
| 119 | } |
| 120 | |
| 121 | |
| 122 | static struct poptOption endOption = { NULL, '\0', 0, NULL, 0}; |
| 123 | |
| 124 | /* As we may load modules in the hooks called for argument processing, |
| 125 | * we have to recreate the argument context each time the |
| 126 | * lttv_options_command_popt is modified. This way we will be able to |
| 127 | * parse arguments defined by the modules |
| 128 | */ |
| 129 | |
| 130 | void lttv_options_command_parse(void *hook_data, void *call_data) |
| 131 | { |
| 132 | int rc; |
| 133 | int lastrc; |
| 134 | poptContext c; |
| 135 | lttv_option *option; |
| 136 | |
| 137 | lttv_hooks_call(hooks_options_before,NULL); |
| 138 | /* Always add then remove the null option around the get context */ |
| 139 | g_array_append_val(lttv_options_command_popt, endOption); |
| 140 | /* Compiler warning caused by const char ** for command_argv in header */ |
| 141 | /* Nothing we can do about it. Header should not put it const. */ |
| 142 | c = poptGetContext("lttv", command_argc, (const char**)command_argv, |
| 143 | (struct poptOption *)(lttv_options_command_popt->data),0); |
| 144 | |
| 145 | /* We remove the null option here to be able to add options correctly */ |
| 146 | g_array_remove_index(lttv_options_command_popt, |
| 147 | lttv_options_command_popt->len - 1); |
| 148 | |
| 149 | /* There is no last good offset */ |
| 150 | lastrc = -1; |
| 151 | |
| 152 | /* Parse options while not end of options event */ |
| 153 | while((rc = poptGetNextOpt(c)) != -1) { |
| 154 | |
| 155 | if(rc == POPT_ERROR_BADOPT) { |
| 156 | /* We need to redo the context with information added by modules */ |
| 157 | g_array_append_val(lttv_options_command_popt, endOption); |
| 158 | poptFreeContext(c); |
| 159 | c = poptGetContext("lttv", command_argc, (const char**)command_argv, |
| 160 | (struct poptOption *)lttv_options_command_popt->data,0); |
| 161 | g_array_remove_index(lttv_options_command_popt, |
| 162 | lttv_options_command_popt->len); |
| 163 | |
| 164 | /* Cut out the already parsed elements */ |
| 165 | if(lastrc != -1) |
| 166 | while(poptGetNextOpt(c) != lastrc) { } ; |
| 167 | |
| 168 | /* Get the same option once again */ |
| 169 | g_assert(rc = poptGetNextOpt(c) != -1) ; |
| 170 | if(rc == POPT_ERROR_BADOPT) { |
| 171 | /* If here again we have a parsing error with all context info ok, |
| 172 | * then there is a problem in the arguments themself, give up */ |
| 173 | g_critical("option %s: %s", poptBadOption(c,0), poptStrerror(rc)); |
| 174 | break ; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | /* Remember this offset as the last good option value */ |
| 179 | lastrc = rc; |
| 180 | |
| 181 | /* Execute the hook registered with this option */ |
| 182 | option = ((lttv_option *)lttv_options_command->data) + rc - 1; |
| 183 | if(option->hook != NULL) option->hook(option->hook_data); |
| 184 | |
| 185 | } |
| 186 | |
| 187 | poptFreeContext(c); |
| 188 | |
| 189 | lttv_hooks_call(hooks_options_after,NULL); |
| 190 | |
| 191 | } |
| 192 | |