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event-sequence-transformation
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Implement command-line arguments

This commit is contained in:
Vftdan 2024-08-18 14:45:53 +02:00
parent 5969a1df8e
commit 01bf0a9608
1 changed files with 80 additions and 3 deletions
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83
main.c
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@ -1,12 +1,89 @@
#include <getopt.h>
#include <stdio.h>
#include "processing.h"
#include "hash_table.h"
#include "module_registry.h"
union __attribute__((transparent_union)) option_ident {
enum {
NCOPT_BASE = 0xFF,
NCOPT_MODULE_HELP,
} as_nonchar;
int as_int;
// No "as_char" field, because it can cause problems on big-endian CPUs
};
int
main(int argc, char ** argv)
{
(void)argc;
(void)argv;
const char* config_filename = "config.cfg";
while (true) {
static const struct option long_options [] = {
{"config", required_argument, NULL, 'c'},
{"help", no_argument, NULL, 'h'},
{"list-modules", no_argument, NULL, 'l'},
{"module-help", required_argument, NULL, NCOPT_MODULE_HELP},
{NULL, 0, NULL, 0}};
static const char help_fstring[] =
"Usage: %s <[options...]>\n"
"Options:\n"
"\t--config <filename>, -c <filename> read configuration from <filename>\n"
"\t instead of ./config.cfg\n"
"\t--help, -h show this message\n"
"\t--list-modules, -l list currently loaded node types\n"
"\t--module-help <name> print help information provided for node type <name>\n"
;
union option_ident opt = {.as_int = getopt_long(argc, argv, "c:hl", long_options, NULL)};
if (opt.as_int < 0) {
break;
}
switch (opt.as_int) {
case 'c':
config_filename = optarg;
break;
case 'h':
printf(help_fstring, argv[0]);
return 0;
case 'l':
{
const GraphNodeSpecificationRegistry * reg = get_graph_node_specification_registy();
for (size_t i = 0; i < reg->capacity; ++i) {
if (!reg->key_array[i].key.bytes) {
continue;
}
printf("%.*s\n", (int) reg->key_array[i].key.length, reg->key_array[i].key.bytes);
}
};
return 0;
case NCOPT_MODULE_HELP:
{
GraphNodeSpecification *spec = lookup_graph_node_specification(optarg);
if (!spec) {
fprintf(stderr, "Unknown node type \"%s\"\n", optarg);
return 1;
}
const char* module_help = NULL;
if (module_help) {
printf("Help for module \"%s\":\n", optarg);
printf("%s\n", module_help);
} else {
printf("No help provided for node type \"%s\"\n", optarg);
}
};
return 0;
default:
fprintf(stderr, "Unexpected option ");
if ((unsigned int) opt.as_int <= 0xFF) {
fprintf(stderr, "'%c'\n", (char) opt.as_int);
} else {
fprintf(stderr, "%d\n", opt.as_int);
}
return 1;
}
}
ProcessingState state = (ProcessingState) {
.wait_delay = NULL,
@ -18,7 +95,7 @@ main(int argc, char ** argv)
config_t config_tree;
FullConfig loaded_config;
config_init(&config_tree);
config_read_file(&config_tree, "config.cfg");
config_read_file(&config_tree, config_filename);
config_set_auto_convert(&config_tree, CONFIG_TRUE);
if (!load_config(config_root_setting(&config_tree), &loaded_config)) {
perror("Failed to load config");