config.c

#include "modules/log.h"
#include "modules/config.h"
#include "modules/filesystem.h"

#include <assert.h>
#include <stdbool.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

#define CONFIG_MAX_LINE_LENGTH 80

enum OptionType {
	OptionType_Boolean,
	OptionType_Int,
	OptionType_Float,
	OptionType_String,
};

struct config_option {
	const char *name;
	enum OptionType type;
	union {
		bool boolean;
		long integer;
		double floating_point;
		char *string;
	} value;
};

static struct config_option s_options[_EpicOptionCount] = {
/* clang-format off */
	#define INIT_Boolean(v)		        { .boolean        = (v) }
	#define INIT_Int(v)  		        { .integer        = (v) }
	#define INIT_Float(v)  		        { .floating_point = (v) }
	#define INIT_String(v)  	        { .string         = (v) }
	#define INIT_(tp, v)                INIT_ ## tp (v)
	#define INIT(tp, v)                 INIT_ (tp, v)

	#define CARD10_SETTING(identifier, spelling, tp, default_value)     \
		[Option ## identifier] = { .name  = (spelling),                 \
					               .type  = OptionType_ ## tp,          \
					               .value = INIT(tp, (default_value)) },

	#include "modules/config.def"
	/* clang-format on */
};

static struct config_option *findOption(const char *key)
{
	for (int i = 0; i < _EpicOptionCount; ++i) {
		if (!strcmp(key, s_options[i].name)) {
			return &s_options[i];
		}
	}
	return NULL;
}

static bool set_bool(struct config_option *opt, const char *value)
{
	bool val;
	if (!strcmp(value, "1")) {
		val = true;
	} else if (!strcmp(value, "true")) {
		val = true;
	} else if (!strcmp(value, "0")) {
		val = false;
	} else if (!strcmp(value, "false")) {
		val = false;