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use low match distance for helping, or use ask user to use "help"

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This commit is contained in:
Love Hornquist Astrand
2011-11-22 13:58:41 -08:00
parent 00494ac136
commit 35848f5869
1 changed files with 23 additions and 8 deletions
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25
lib/sl/sl.c
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@@ -443,10 +443,18 @@ osad(const char *s1, const char *s2)
return cost; return cost;
} }
/**
* Will propose a list of command that are almost matching the command
* used, if there is no matching, will ask the user to use "help".
*
* @param cmds command array to use for matching
* @param match the command that didn't exists
*/
void void
sl_did_you_mean(SL_cmd *cmds, const char *match) sl_did_you_mean(SL_cmd *cmds, const char *match)
{ {
int *metrics, best_match = INT_MAX, print = 0; int *metrics, best_match = INT_MAX;
SL_cmd *c; SL_cmd *c;
size_t n; size_t n;
@@ -467,14 +475,21 @@ sl_did_you_mean(SL_cmd *cmds, const char *match)
return; return;
} }
fprintf(stderr, "%s is not a known command, did you mean:", match); /* if match distance is low, propose that for the user */
if (best_match < 7) {
fprintf(stderr, "error: %s is not a known command, did you mean ?\n", match);
for (n = 0; cmds[n].name; n++) { for (n = 0; cmds[n].name; n++) {
if (metrics[n] == best_match) { if (metrics[n] == best_match) {
fprintf(stderr, "%s %s", print ? "," : "", cmds[n].name); fprintf(stderr, "\t%s\n", cmds[n].name);
print = 1;
} }
} }
fprintf(stderr, " ?\n"); fprintf(stderr, "\n");
} else {
fprintf(stderr, "error: %s is not a command, use \"help\" for more list of commands.\n", match);
}
free(metrics); free(metrics);