#define _POSIX_C_SOURCE 200809L

#include <stdarg.h>
#include <stdlib.h>
#include <stdnoreturn.h>
#include <string.h>
#include "parse.h"
#include "util.h"

static noreturn void
error(struct location loc, const char *fmt, ...)
{
	fprintf(stderr, "%s:%d:%d ", loc.file, loc.line, loc.column);

	va_list ap;
	va_start(ap, fmt);
	vfprintf(stderr, fmt, ap);
	va_end(ap);

	fprintf(stderr, "\n");
	exit(EXIT_PARSE);
}

static void
append(struct path *path, const char *name)
{
	if (path->seglen >= path->segsz) {
		path->segsz *= 2;
		size_t sz = sizeof(const char *) * path->segsz;
		path->segments = must_realloc(path->segments, sz);
	}

	path->segments[path->seglen++] = name;
}

static bool
parse_path(struct lexer *lexer, struct path *out)
{
	struct token name;

	if (lex(lexer, &name) != T_NAME) {
		unlex(lexer, &name);
		return false;
	}

	out->segments = must_calloc(1, sizeof(const char *));
	out->segments[0] = name.info.str;
	out->seglen = 1;
	out->segsz = 1;

	while (match(lexer, T_MODDELIM)) {
		if (lex(lexer, &name) != T_NAME) {
			error(name.loc, "syntax error: expected name");
		}
		append(out, name.info.str);
	}

	return true;
}

void
parse(struct lexer *lexer, struct ast_unit *u)
{
}