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| | #include <assert.h>
#include <string.h>
#include <stdio.h>
#include "error_util.h"
#include "command-line-arguments.h"
/*
Search the array of keywords for a given argument, assigning the
output variable to the corresponding value. Return FALSE if nothing
matches.
*/
static notmuch_bool_t
_process_keyword_arg (const notmuch_opt_desc_t *arg_desc, const char *arg_str) {
const notmuch_keyword_t *keywords = arg_desc->keywords;
if (arg_str == NULL) {
/* no keyword specified, use the first keyword as default */
if (arg_desc->output_var)
*((int *)arg_desc->output_var) = keywords->value;
return TRUE;
}
while (keywords->name) {
if (strcmp (arg_str, keywords->name) == 0) {
if (arg_desc->output_var) {
*((int *)arg_desc->output_var) = keywords->value;
}
return TRUE;
}
keywords++;
}
fprintf (stderr, "unknown keyword: %s\n", arg_str);
return FALSE;
}
static notmuch_bool_t
_process_boolean_arg (const notmuch_opt_desc_t *arg_desc, const char *arg_str)
{
notmuch_bool_t value = TRUE;
if (arg_str) {
if (strcmp (arg_str, "true") == 0) {
value = TRUE;
} else if (strcmp (arg_str, "false") == 0) {
value = FALSE;
} else {
fprintf (stderr, "unknown boolean: %s\n", arg_str);
return FALSE;
}
}
*((notmuch_bool_t *)arg_desc->output_var) = value;
return TRUE;
}
/*
Search for the {pos_arg_index}th position argument, return FALSE if
that does not exist.
*/
notmuch_bool_t
parse_position_arg (const char *arg_str, int pos_arg_index,
const notmuch_opt_desc_t *arg_desc) {
int pos_arg_counter = 0;
while (arg_desc->opt_type != NOTMUCH_OPT_END){
if (arg_desc->opt_type == NOTMUCH_OPT_POSITION) {
if (pos_arg_counter == pos_arg_index) {
if (arg_desc->output_var) {
*((const char **)arg_desc->output_var) = arg_str;
}
return TRUE;
}
pos_arg_counter++;
}
arg_desc++;
}
return FALSE;
}
/*
* Search for a non-positional (i.e. starting with --) argument matching arg,
* parse a possible value, and assign to *output_var
*/
notmuch_bool_t
parse_option (const char *arg,
const notmuch_opt_desc_t *options) {
assert(arg);
assert(options);
arg += 2;
const notmuch_opt_desc_t *try = options;
while (try->opt_type != NOTMUCH_OPT_END) {
if (try->name && strncmp (arg, try->name, strlen (try->name)) == 0) {
char next = arg[strlen (try->name)];
const char *value= arg+strlen(try->name)+1;
char *endptr;
/* Everything but boolean arguments (switches) needs a
* delimiter, and a non-zero length value
*/
if (next == '=' || next == ':') {
if (value[0] == '\0')
return FALSE;
} else if (next == '\0') {
value = NULL;
if (try->opt_type != NOTMUCH_OPT_BOOLEAN &&
try->opt_type != NOTMUCH_OPT_KEYWORD_DEFAULT)
return FALSE;
} else {
return FALSE;
}
if (try->output_var == NULL)
INTERNAL_ERROR ("output pointer NULL for option %s", try->name);
switch (try->opt_type) {
case NOTMUCH_OPT_KEYWORD:
case NOTMUCH_OPT_KEYWORD_DEFAULT:
return _process_keyword_arg (try, value);
break;
case NOTMUCH_OPT_BOOLEAN:
return _process_boolean_arg (try, value);
break;
case NOTMUCH_OPT_INT:
*((int *)try->output_var) = strtol (value, &endptr, 10);
return (*endptr == 0);
break;
case NOTMUCH_OPT_STRING:
*((const char **)try->output_var) = value;
return TRUE;
break;
case NOTMUCH_OPT_POSITION:
case NOTMUCH_OPT_END:
default:
INTERNAL_ERROR ("unknown or unhandled option type %d", try->opt_type);
/*UNREACHED*/
}
}
try++;
}
fprintf (stderr, "Unrecognized option: --%s\n", arg);
return FALSE;
}
/* See command-line-arguments.h for description */
int
parse_arguments (int argc, char **argv,
const notmuch_opt_desc_t *options, int opt_index) {
int pos_arg_index = 0;
notmuch_bool_t more_args = TRUE;
while (more_args && opt_index < argc) {
if (strncmp (argv[opt_index],"--",2) != 0) {
more_args = parse_position_arg (argv[opt_index], pos_arg_index, options);
if (more_args) {
pos_arg_index++;
opt_index++;
}
} else {
if (strlen (argv[opt_index]) == 2)
return opt_index+1;
more_args = parse_option (argv[opt_index], options);
if (more_args) {
opt_index++;
} else {
opt_index = -1;
}
}
}
return opt_index;
}
|