xref: /netbsd-src/external/bsd/pkg_install/dist/lib/str.c (revision f46918ca2125b9b1e7ca5a22c07d1414c618e467)

/*	$NetBSD: str.c,v 1.3 2021/04/10 19:49:59 nia Exp $	*/

#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <nbcompat.h>
#if HAVE_SYS_CDEFS_H
#include <sys/cdefs.h>
#endif
__RCSID("$NetBSD: str.c,v 1.3 2021/04/10 19:49:59 nia Exp $");

/*
 * FreeBSD install - a package for the installation and maintainance
 * of non-core utilities.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * Jordan K. Hubbard
 * 18 July 1993
 *
 * Miscellaneous string utilities.
 *
 */

#if HAVE_ASSERT_H
#include <assert.h>
#endif
#if HAVE_ERR_H
#include <err.h>
#endif
#if HAVE_FNMATCH_H
#include <fnmatch.h>
#endif
#include "lib.h"
#include "dewey.h"

/* pull in definitions and macros for resizing arrays as we go */
#include "defs.h"

/*
 * Return the suffix portion of a path
 */
const char *
suffix_of(const char *str)
{
	const char *dot;

	return ((dot = strrchr(basename_of(str), '.')) == NULL) ? "" : dot + 1;
}

/*
 * Return the filename portion of a path
 */
const char *
basename_of(const char *str)
{
	const char *slash;

	return ((slash = strrchr(str, '/')) == NULL) ? str : slash + 1;
}

/*
 * Return the dirname portion of a path
 */
const char *
dirname_of(const char *path)
{
	size_t  cc;
	char   *s;
	static char buf[MaxPathSize];

	if ((s = strrchr(path, '/')) == NULL) {
		return ".";
	}
	if (s == path) {
		/* "/foo" -> return "/" */
		return "/";
	}
	cc = (size_t) (s - path);
	if (cc >= sizeof(buf))
		errx(EXIT_FAILURE, "dirname_of: too long dirname: '%s'", path);
	(void) memcpy(buf, path, cc);
	buf[cc] = 0;
	return buf;
}

/*
 * Does the pkgname contain any of the special chars ("{[]?*<>")?
 * If so, return 1, else 0
 */
int
ispkgpattern(const char *pkg)
{
	return strpbrk(pkg, "<>[]?*{") != NULL;
}