#include "precompiled.h"

void __declspec(noreturn) do_exit(int exitval)
{
	//Allahu Akbar!!
	*((int *)nullptr) = 0;
}

// Checks for a non-empty file, relative to the gamedir if necessary.
// Formerly used LOAD_FILE_FOR_ME, which provided a simple way to check for
// a file under the gamedir, but which would _also_ look in the sibling
// "valve" directory, thus sometimes finding files that weren't desired.
// Also, formerly named just "valid_file".
//
// Special-case-recognize "/dev/null" as a valid file.
int valid_gamedir_file(const char* path)
{
	struct stat st;
	char buf[PATH_MAX];
	
	if (!path)
		return FALSE;

	if (!Q_strcmp(path, "/dev/null"))
		return TRUE;

	if (is_absolute_path(path))
	{
		Q_strncpy(buf, path, sizeof buf);
		buf[sizeof buf - 1] = '\0';
	}
	else
		snprintf(buf, sizeof buf, "%s/%s", g_GameDLL.gamedir, path);

	int ret = stat(buf, &st);
	if (ret != 0)
	{
		META_DEBUG(5, "Unable to stat '%s': %s", buf, strerror(errno));
		return FALSE;
	}

	int reg = S_ISREG(st.st_mode);
	if (!reg)
	{
		META_DEBUG(5, "Not a regular file: %s", buf);
		return FALSE;
	}

	if (!st.st_size)
	{
		META_DEBUG(5, "Empty file: %s", buf);
		return FALSE;
	}

	if (ret == 0 && reg)
		return TRUE;

	return FALSE;
}

// Turns path into a full path:
//  - if not absolute, prepends gamedir
//  - calls realpath() to collapse ".." and such
//  - calls normalize_pathname() to fix backslashes, etc
//
// Much like realpath, buffer pointed to by fullpath is assumed to be
// able to store a string of PATH_MAX length.
char* full_gamedir_path(const char* path, char* fullpath)
{
	char buf[PATH_MAX ];

	// Build pathname from filename, plus gamedir if relative path.
	if (is_absolute_path(path))
	{
		Q_strncpy(buf, path, sizeof buf - 1);
		buf[sizeof buf - 1] = '\0';
	}
	else snprintf(buf, sizeof buf, "%s/%s", g_GameDLL.gamedir, path);

	// Remove relative path components, if possible.
	if (!realpath(buf, fullpath))
	{
		META_DEBUG(4, "Unable to get realpath for '%s': %s", buf, str_os_error());
		Q_strncpy(fullpath, path, sizeof fullpath - 1);
		fullpath[sizeof fullpath - 1] = '\0';
	}

	// Replace backslashes, etc.
	normalize_pathname(fullpath);
	return fullpath;
}