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/* $Id$ */

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/** @file unix.cpp Implementation of Unix specific file handling. */

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#include "stdafx.h"

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#include "openttd.h"

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#include "variables.h"

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#include "textbuf_gui.h"

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#include "functions.h"

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#include "core/random_func.hpp"

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#include "table/strings.h"

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#include <dirent.h>

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#include <unistd.h>

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#include <sys/stat.h>

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#include <time.h>

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#include <signal.h>

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#if (defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L) || defined(__GLIBC__)

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	#define HAS_STATVFS

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#endif

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#ifdef HAS_STATVFS

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#include <sys/statvfs.h>

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#endif

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#ifdef __MORPHOS__

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#include <exec/types.h>

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ULONG __stack = (1024*1024)*2; // maybe not that much is needed actually ;)

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/* The system supplied definition of SIG_IGN does not match */

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#undef SIG_IGN

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#define SIG_IGN (void (*)(int))1

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#endif /* __MORPHOS__ */

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#ifdef __AMIGA__

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#warning add stack symbol to avoid that user needs to set stack manually (tokai)

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// ULONG __stack =

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#endif

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#if defined(__APPLE__)

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	#if defined(WITH_SDL)

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		/*the mac implementation needs this file included in the same file as main() */

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		#include <SDL.h>

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	#endif

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#endif

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bool FiosIsRoot(const char *path)

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{

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#if !defined(__MORPHOS__) && !defined(__AMIGAOS__)

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	return path[1] == '\0';

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#else

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	/* On MorphOS or AmigaOS paths look like: "Volume:directory/subdirectory" */

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	const char *s = strchr(path, ':');

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	return s != NULL && s[1] == '\0';

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#endif

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}

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void FiosGetDrives()

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{

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	return;

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}

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bool FiosGetDiskFreeSpace(const char *path, uint32 *tot)

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{

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	uint32 free = 0;

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#ifdef HAS_STATVFS

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# ifdef __APPLE__

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	/* OSX 10.3 lacks statvfs so don't try to use it even though later versions of OSX has it. */

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	if (MacOSVersionIsAtLeast(10, 4, 0))

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# endif

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	{

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		struct statvfs s;

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		if (statvfs(path, &s) != 0) return false;

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		free = (uint64)s.f_frsize * s.f_bavail >> 20;

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	}

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#endif

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	if (tot != NULL) *tot = free;

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	return true;

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}

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bool FiosIsValidFile(const char *path, const struct dirent *ent, struct stat *sb)

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{

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	char filename[MAX_PATH];

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#if defined(__MORPHOS__) || defined(__AMIGAOS__)

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	/* On MorphOS or AmigaOS paths look like: "Volume:directory/subdirectory" */

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	if (FiosIsRoot(path)) {

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		snprintf(filename, lengthof(filename), "%s:%s", path, ent->d_name);

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	} else // XXX - only next line!

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#else

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	assert(path[strlen(path) - 1] == PATHSEPCHAR);

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	if (strlen(path) > 2) assert(path[strlen(path) - 2] != PATHSEPCHAR);

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#endif

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	snprintf(filename, lengthof(filename), "%s%s", path, ent->d_name);

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	return stat(filename, sb) == 0;

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}

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bool FiosIsHiddenFile(const struct dirent *ent)

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{

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	return ent->d_name[0] == '.';

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}

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#ifdef WITH_ICONV

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#include <iconv.h>

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#include <errno.h>

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#include "debug.h"

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#include "string_func.h"

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const char *GetCurrentLocale(const char *param);

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#define INTERNALCODE "UTF-8"

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/** Try and try to decipher the current locale from environmental

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 * variables. MacOSX is hardcoded, other OS's are dynamic. If no suitable

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 * locale can be found, don't do any conversion "" */

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static const char *GetLocalCode()

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{

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#if defined(__APPLE__)

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	return "UTF-8-MAC";

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#else

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	/* Strip locale (eg en_US.UTF-8) to only have UTF-8 */

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	const char *locale = GetCurrentLocale("LC_CTYPE");

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	if (locale != NULL) locale = strchr(locale, '.');

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	return (locale == NULL) ? "" : locale + 1;

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#endif

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}

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/** FYI: This is not thread-safe.

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 * convert between locales, which from and which to is set in the calling

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 * functions OTTD2FS() and FS2OTTD(). You should NOT use this function directly

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 * NOTE: iconv was added in OSX 10.3. 10.2.x will still have the invalid char

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 * issues. There aren't any easy fix for this */

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static const char *convert_tofrom_fs(iconv_t convd, const char *name)

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{

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	static char buf[1024];

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	/* Work around buggy iconv implementation where inbuf is wrongly typed as

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	 * non-const. Correct implementation is at

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	 * http://www.opengroup.org/onlinepubs/007908799/xsh/iconv.html */

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#ifdef HAVE_BROKEN_ICONV

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	char *inbuf = (char*)name;

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#else

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	const char *inbuf = name;

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#endif

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	char *outbuf  = buf;

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	size_t outlen = sizeof(buf) - 1;

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	size_t inlen  = strlen(name);

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	ttd_strlcpy(outbuf, name, sizeof(buf));

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	iconv(convd, NULL, NULL, NULL, NULL);

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	if (iconv(convd, &inbuf, &inlen, &outbuf, &outlen) == (size_t)(-1)) {

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		DEBUG(misc, 0, "[iconv] error converting '%s'. Errno %d", name, errno);

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	}

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	*outbuf = '\0';

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	/* FIX: invalid characters will abort conversion, but they shouldn't occur? */

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	return buf;

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}

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/** Convert from OpenTTD's encoding to that of the local environment

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 * @param name pointer to a valid string that will be converted

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 * @return pointer to a new stringbuffer that contains the converted string */

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const char *OTTD2FS(const char *name)

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{

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	static iconv_t convd = (iconv_t)(-1);

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	if (convd == (iconv_t)(-1)) {

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		const char *env = GetLocalCode();

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		convd = iconv_open(env, INTERNALCODE);

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		if (convd == (iconv_t)(-1)) {

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			DEBUG(misc, 0, "[iconv] conversion from codeset '%s' to '%s' unsupported", INTERNALCODE, env);

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			return name;

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		}

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	}

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	return convert_tofrom_fs(convd, name);

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}

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/** Convert to OpenTTD's encoding from that of the local environment

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 * @param name pointer to a valid string that will be converted

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 * @return pointer to a new stringbuffer that contains the converted string */

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const char *FS2OTTD(const char *name)

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{

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	static iconv_t convd = (iconv_t)(-1);

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	if (convd == (iconv_t)(-1)) {

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		const char *env = GetLocalCode();

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		convd = iconv_open(INTERNALCODE, env);

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		if (convd == (iconv_t)(-1)) {

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			DEBUG(misc, 0, "[iconv] conversion from codeset '%s' to '%s' unsupported", env, INTERNALCODE);

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			return name;

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		}

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	}

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	return convert_tofrom_fs(convd, name);

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}

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#else

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const char *FS2OTTD(const char *name) {return name;}

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const char *OTTD2FS(const char *name) {return name;}

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#endif /* WITH_ICONV */