1*5feaac24SJosh Poimboeuf #include "cache.h" 2*5feaac24SJosh Poimboeuf #include "help.h" 3*5feaac24SJosh Poimboeuf #include "../builtin.h" 4*5feaac24SJosh Poimboeuf #include "levenshtein.h" 5*5feaac24SJosh Poimboeuf 6*5feaac24SJosh Poimboeuf static int autocorrect; 7*5feaac24SJosh Poimboeuf static struct cmdnames aliases; 8*5feaac24SJosh Poimboeuf 9*5feaac24SJosh Poimboeuf static int perf_unknown_cmd_config(const char *var, const char *value, void *cb) 10*5feaac24SJosh Poimboeuf { 11*5feaac24SJosh Poimboeuf if (!strcmp(var, "help.autocorrect")) 12*5feaac24SJosh Poimboeuf autocorrect = perf_config_int(var,value); 13*5feaac24SJosh Poimboeuf /* Also use aliases for command lookup */ 14*5feaac24SJosh Poimboeuf if (!prefixcmp(var, "alias.")) 15*5feaac24SJosh Poimboeuf add_cmdname(&aliases, var + 6, strlen(var + 6)); 16*5feaac24SJosh Poimboeuf 17*5feaac24SJosh Poimboeuf return perf_default_config(var, value, cb); 18*5feaac24SJosh Poimboeuf } 19*5feaac24SJosh Poimboeuf 20*5feaac24SJosh Poimboeuf static int levenshtein_compare(const void *p1, const void *p2) 21*5feaac24SJosh Poimboeuf { 22*5feaac24SJosh Poimboeuf const struct cmdname *const *c1 = p1, *const *c2 = p2; 23*5feaac24SJosh Poimboeuf const char *s1 = (*c1)->name, *s2 = (*c2)->name; 24*5feaac24SJosh Poimboeuf int l1 = (*c1)->len; 25*5feaac24SJosh Poimboeuf int l2 = (*c2)->len; 26*5feaac24SJosh Poimboeuf return l1 != l2 ? l1 - l2 : strcmp(s1, s2); 27*5feaac24SJosh Poimboeuf } 28*5feaac24SJosh Poimboeuf 29*5feaac24SJosh Poimboeuf static void add_cmd_list(struct cmdnames *cmds, struct cmdnames *old) 30*5feaac24SJosh Poimboeuf { 31*5feaac24SJosh Poimboeuf unsigned int i; 32*5feaac24SJosh Poimboeuf 33*5feaac24SJosh Poimboeuf ALLOC_GROW(cmds->names, cmds->cnt + old->cnt, cmds->alloc); 34*5feaac24SJosh Poimboeuf 35*5feaac24SJosh Poimboeuf for (i = 0; i < old->cnt; i++) 36*5feaac24SJosh Poimboeuf cmds->names[cmds->cnt++] = old->names[i]; 37*5feaac24SJosh Poimboeuf zfree(&old->names); 38*5feaac24SJosh Poimboeuf old->cnt = 0; 39*5feaac24SJosh Poimboeuf } 40*5feaac24SJosh Poimboeuf 41*5feaac24SJosh Poimboeuf const char *help_unknown_cmd(const char *cmd) 42*5feaac24SJosh Poimboeuf { 43*5feaac24SJosh Poimboeuf unsigned int i, n = 0, best_similarity = 0; 44*5feaac24SJosh Poimboeuf struct cmdnames main_cmds, other_cmds; 45*5feaac24SJosh Poimboeuf 46*5feaac24SJosh Poimboeuf memset(&main_cmds, 0, sizeof(main_cmds)); 47*5feaac24SJosh Poimboeuf memset(&other_cmds, 0, sizeof(main_cmds)); 48*5feaac24SJosh Poimboeuf memset(&aliases, 0, sizeof(aliases)); 49*5feaac24SJosh Poimboeuf 50*5feaac24SJosh Poimboeuf perf_config(perf_unknown_cmd_config, NULL); 51*5feaac24SJosh Poimboeuf 52*5feaac24SJosh Poimboeuf load_command_list("perf-", &main_cmds, &other_cmds); 53*5feaac24SJosh Poimboeuf 54*5feaac24SJosh Poimboeuf add_cmd_list(&main_cmds, &aliases); 55*5feaac24SJosh Poimboeuf add_cmd_list(&main_cmds, &other_cmds); 56*5feaac24SJosh Poimboeuf qsort(main_cmds.names, main_cmds.cnt, 57*5feaac24SJosh Poimboeuf sizeof(main_cmds.names), cmdname_compare); 58*5feaac24SJosh Poimboeuf uniq(&main_cmds); 59*5feaac24SJosh Poimboeuf 60*5feaac24SJosh Poimboeuf if (main_cmds.cnt) { 61*5feaac24SJosh Poimboeuf /* This reuses cmdname->len for similarity index */ 62*5feaac24SJosh Poimboeuf for (i = 0; i < main_cmds.cnt; ++i) 63*5feaac24SJosh Poimboeuf main_cmds.names[i]->len = 64*5feaac24SJosh Poimboeuf levenshtein(cmd, main_cmds.names[i]->name, 0, 2, 1, 4); 65*5feaac24SJosh Poimboeuf 66*5feaac24SJosh Poimboeuf qsort(main_cmds.names, main_cmds.cnt, 67*5feaac24SJosh Poimboeuf sizeof(*main_cmds.names), levenshtein_compare); 68*5feaac24SJosh Poimboeuf 69*5feaac24SJosh Poimboeuf best_similarity = main_cmds.names[0]->len; 70*5feaac24SJosh Poimboeuf n = 1; 71*5feaac24SJosh Poimboeuf while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len) 72*5feaac24SJosh Poimboeuf ++n; 73*5feaac24SJosh Poimboeuf } 74*5feaac24SJosh Poimboeuf 75*5feaac24SJosh Poimboeuf if (autocorrect && n == 1) { 76*5feaac24SJosh Poimboeuf const char *assumed = main_cmds.names[0]->name; 77*5feaac24SJosh Poimboeuf 78*5feaac24SJosh Poimboeuf main_cmds.names[0] = NULL; 79*5feaac24SJosh Poimboeuf clean_cmdnames(&main_cmds); 80*5feaac24SJosh Poimboeuf fprintf(stderr, "WARNING: You called a perf program named '%s', " 81*5feaac24SJosh Poimboeuf "which does not exist.\n" 82*5feaac24SJosh Poimboeuf "Continuing under the assumption that you meant '%s'\n", 83*5feaac24SJosh Poimboeuf cmd, assumed); 84*5feaac24SJosh Poimboeuf if (autocorrect > 0) { 85*5feaac24SJosh Poimboeuf fprintf(stderr, "in %0.1f seconds automatically...\n", 86*5feaac24SJosh Poimboeuf (float)autocorrect/10.0); 87*5feaac24SJosh Poimboeuf poll(NULL, 0, autocorrect * 100); 88*5feaac24SJosh Poimboeuf } 89*5feaac24SJosh Poimboeuf return assumed; 90*5feaac24SJosh Poimboeuf } 91*5feaac24SJosh Poimboeuf 92*5feaac24SJosh Poimboeuf fprintf(stderr, "perf: '%s' is not a perf-command. See 'perf --help'.\n", cmd); 93*5feaac24SJosh Poimboeuf 94*5feaac24SJosh Poimboeuf if (main_cmds.cnt && best_similarity < 6) { 95*5feaac24SJosh Poimboeuf fprintf(stderr, "\nDid you mean %s?\n", 96*5feaac24SJosh Poimboeuf n < 2 ? "this": "one of these"); 97*5feaac24SJosh Poimboeuf 98*5feaac24SJosh Poimboeuf for (i = 0; i < n; i++) 99*5feaac24SJosh Poimboeuf fprintf(stderr, "\t%s\n", main_cmds.names[i]->name); 100*5feaac24SJosh Poimboeuf } 101*5feaac24SJosh Poimboeuf 102*5feaac24SJosh Poimboeuf exit(1); 103*5feaac24SJosh Poimboeuf } 104