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#include <assert.h>
#include <string.h>
#include <stdio.h>
#include "error_util.h"
#include "command-line-arguments.h"
typedef enum {
OPT_FAILED, /* false */
OPT_OK, /* good */
OPT_GIVEBACK, /* pop one of the arguments you thought you were getting off the stack */
} opt_handled;
/*
* Search the array of keywords for a given argument, assigning the
* output variable to the corresponding value. Return false if nothing
* matches.
*/
static opt_handled
_process_keyword_arg (const notmuch_opt_desc_t *arg_desc, char next,
const char *arg_str, bool negate)
{
const notmuch_keyword_t *keywords;
if (next == '\0') {
/* No keyword given */
arg_str = "";
}
for (keywords = arg_desc->keywords; keywords->name; keywords++) {
if (strcmp (arg_str, keywords->name) != 0)
continue;
if (arg_desc->opt_flags && negate)
*arg_desc->opt_flags &= ~keywords->value;
else if (arg_desc->opt_flags)
*arg_desc->opt_flags |= keywords->value;
else
*arg_desc->opt_keyword = keywords->value;
return OPT_OK;
}
if (arg_desc->opt_keyword && arg_desc->keyword_no_arg_value && next != ':' && next != '=') {
for (keywords = arg_desc->keywords; keywords->name; keywords++) {
if (strcmp (arg_desc->keyword_no_arg_value, keywords->name) != 0)
continue;
*arg_desc->opt_keyword = keywords->value;
fprintf (stderr,
"Warning: No known keyword option given for \"%s\", choosing value \"%s\"."
" Please specify the argument explicitly!\n", arg_desc->name,
arg_desc->keyword_no_arg_value);
return OPT_GIVEBACK;
}
fprintf (stderr,
"No matching keyword for option \"%s\" and default value \"%s\" is invalid.\n",
arg_str,
arg_desc->name);
return OPT_FAILED;
}
if (next != '\0')
fprintf (stderr, "Unknown keyword argument \"%s\" for option \"%s\".\n", arg_str,
arg_desc->name);
else
fprintf (stderr, "Option \"%s\" needs a keyword argument.\n", arg_desc->name);
return OPT_FAILED;
}
static opt_handled
_process_boolean_arg (const notmuch_opt_desc_t *arg_desc, char next,
const char *arg_str, bool negate)
{
bool value;
if (next == '\0' || strcmp (arg_str, "true") == 0) {
value = true;
} else if (strcmp (arg_str, "false") == 0) {
value = false;
} else {
fprintf (stderr, "Unknown argument \"%s\" for (boolean) option \"%s\".\n", arg_str,
arg_desc->name);
return OPT_FAILED;
}
*arg_desc->opt_bool = negate ? (! value) : value;
return OPT_OK;
}
static opt_handled
_process_int_arg (const notmuch_opt_desc_t *arg_desc, char next, const char *arg_str)
{
char *endptr;
if (next == '\0' || arg_str[0] == '\0') {
fprintf (stderr, "Option \"%s\" needs an integer argument.\n", arg_desc->name);
return OPT_FAILED;
}
*arg_desc->opt_int = strtol (arg_str, &endptr, 10);
if (*endptr == '\0')
return OPT_OK;
fprintf (stderr, "Unable to parse argument \"%s\" for option \"%s\" as an integer.\n",
arg_str, arg_desc->name);
return OPT_FAILED;
}
static opt_handled
_process_string_arg (const notmuch_opt_desc_t *arg_desc, char next, const char *arg_str)
{
if (next == '\0') {
fprintf (stderr, "Option \"%s\" needs a string argument.\n", arg_desc->name);
return OPT_FAILED;
}
if (arg_str[0] == '\0' && ! arg_desc->allow_empty) {
fprintf (stderr, "String argument for option \"%s\" must be non-empty.\n", arg_desc->name);
return OPT_FAILED;
}
*arg_desc->opt_string = arg_str;
return OPT_OK;
}
/* Return number of non-NULL opt_* fields in opt_desc. */
static int
_opt_set_count (const notmuch_opt_desc_t *opt_desc)
{
return
(bool) opt_desc->opt_inherit +
(bool) opt_desc->opt_bool +
(bool) opt_desc->opt_int +
(bool) opt_desc->opt_keyword +
(bool) opt_desc->opt_flags +
(bool) opt_desc->opt_string +
(bool) opt_desc->opt_position;
}
/* Return true if opt_desc is valid. */
static bool
_opt_valid (const notmuch_opt_desc_t *opt_desc)
{
int n = _opt_set_count (opt_desc);
if (n > 1)
INTERNAL_ERROR ("more than one non-NULL opt_* field for argument \"%s\"",
opt_desc->name);
return n > 0;
}
/*
* Search for the {pos_arg_index}th position argument, return false if
* that does not exist.
*/
bool
parse_position_arg (const char *arg_str, int pos_arg_index,
const notmuch_opt_desc_t *arg_desc)
{
int pos_arg_counter = 0;
while (_opt_valid (arg_desc)) {
if (arg_desc->opt_position) {
if (pos_arg_counter == pos_arg_index) {
*arg_desc->opt_position = arg_str;
if (arg_desc->present)
*arg_desc->present = true;
return true;
}
pos_arg_counter++;
}
arg_desc++;
}
return false;
}
#define NEGATIVE_PREFIX "no-"
/*
* Search for a non-positional (i.e. starting with --) argument matching arg,
* parse a possible value, and assign to *output_var
*/
int
parse_option (int argc, char **argv, const notmuch_opt_desc_t *options, int opt_index)
{
assert (argv);
const char *_arg = argv[opt_index];
assert (_arg);
assert (options);
const char *arg = _arg + 2; /* _arg starts with -- */
const char *negative_arg = NULL;
/* See if this is a --no-argument */
if (strlen (arg) > strlen (NEGATIVE_PREFIX) &&
strncmp (arg, NEGATIVE_PREFIX, strlen (NEGATIVE_PREFIX)) == 0) {
negative_arg = arg + strlen (NEGATIVE_PREFIX);
}
const notmuch_opt_desc_t *try;
const char *next_arg = NULL;
if (opt_index < argc - 1 && strncmp (argv[opt_index + 1], "--", 2) != 0)
next_arg = argv[opt_index + 1];
for (try = options; _opt_valid (try); try++) {
if (try->opt_inherit) {
int new_index = parse_option (argc, argv, try->opt_inherit, opt_index);
if (new_index >= 0)
return new_index;
}
if (! try->name)
continue;
char next;
const char *value;
bool negate = false;
if (strncmp (arg, try->name, strlen (try->name)) == 0) {
next = arg[strlen (try->name)];
value = arg + strlen (try->name) + 1;
} else if (negative_arg && (try->opt_bool || try->opt_flags) &&
strncmp (negative_arg, try->name, strlen (try->name)) == 0) {
next = negative_arg[strlen (try->name)];
value = negative_arg + strlen (try->name) + 1;
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