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cli: nmc_string_is_valid() utility function

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This function checks whether a string is contained among allowed strings. It
performs case-insensitive comparison and supports shortcuts if they are unique.
It returns a pointer to the found string in allowed array, or NULL.
This commit is contained in:
Jiří Klimeš 2013-04-08 09:25:44 +02:00
parent ced61dfc7f
commit 8598ee1139
2 changed files with 49 additions and 0 deletions
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48
cli/src/utils.c
View file

@ -302,6 +302,54 @@ nmc_string_to_arg_array (const char *line, const char *delim, char ***argv, int
return 0;
}
/*
* Check whether 'input' is contained in 'allowed' array. It performs case
* insensitive comparison and supports shortcut strings if they are unique.
* Returns: a pointer to found string in allowed array on success or NULL.
* On failure: error->code : 0 - string not found; 1 - string is ambiguous
*/
const char *
nmc_string_is_valid (const char *input, const char **allowed, GError **error)
{
const char **p;
size_t input_ln, p_len;
gboolean prev_match = FALSE;
const char *ret = NULL;
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
if (!input || !*input)
goto finish;
input_ln = strlen (input);
for (p = allowed; p && *p; p++) {
p_len = strlen (*p);
if (g_ascii_strncasecmp (input, *p, input_ln) == 0) {
if (input_ln == p_len) {
ret = *p;
break;
}
if (!prev_match)
ret = *p;
else {
g_set_error (error, 1, 1, _("'%s' is ambiguous (%s x %s)"),
input, ret, *p);
return NULL;
}
prev_match = TRUE;
}
}
finish:
if (ret == NULL) {
char *valid_vals = g_strjoinv (", ", (char **) allowed);
g_set_error (error, 1, 0, _("'%s' not among [%s]"),
input ? input : "", valid_vals);
g_free (valid_vals);
}
return ret;
}
/*
* Find out how many columns an UTF-8 string occupies on the screen
*/

1
cli/src/utils.h
View file

@ -46,6 +46,7 @@ void nmc_terminal_erase_line (void);
void nmc_terminal_show_progress (const char *str);
char *nmc_get_user_input (const char *ask_str);
int nmc_string_to_arg_array (const char *line, const char *delim, char ***argv, int *argc);
const char *nmc_string_is_valid (const char *input, const char **allowed, GError **error);
int nmc_string_screen_width (const char *start, const char *end);
void set_val_str (NmcOutputField fields_array[], guint32 index, char *value);
void set_val_arr (NmcOutputField fields_array[], guint32 index, char **value);