cedll.c

/*	cedll
	A part from the Windows CE C Extra Library (celibc) by PC GO
	Copyright 2007-2015 PC GO Ld.

	This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
*/

#include <windows.h>
#include <limits.h>
#include <string.h>
#include <wchar.h>

int GetComputerName(char *buffer, unsigned long int *size) {
	HKEY key;
	unsigned long int DataSize = 4096;
	if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"Ident", 0, 0, &key) != ERROR_SUCCESS) return 0;
	wchar_t wbuffer[PATH_MAX];
	if(RegQueryValueEx(key, L"Name", NULL, NULL, (unsigned char *)wbuffer, &DataSize) != ERROR_SUCCESS) {
		RegCloseKey(key);
		return 0;
	}
	wbuffer[PATH_MAX] = 0;
	RegCloseKey(key);
	unsigned long int len = wcslen(wbuffer) * 2;
	if(*size < len) {
		*size = len;
		SetLastError(ERROR_BUFFER_OVERFLOW);
		return 0;
	}
	*size = len;
	return (int)wcstombs(buffer, wbuffer, len) >= 0;
}

char *CeGetApplicationPath() {
	wchar_t wname[PATH_MAX];
	size_t len = GetModuleFileNameW(NULL, wname, sizeof(wname)/sizeof(wname[0])) * 2;
	if(len > PATH_MAX + 1) len = PATH_MAX + 1;
	char name[len];
	wcstombs(memset(name, 0, len), wname, len);
	int i = len - 2, s = 0;
	char *path = malloc((len - 1) * sizeof(char));
	for(; i>=0; i--) {
		if(name[i] == '/' || name[i] == '\\') {
			if(!s) path[i+1] = 0;
			s = 1;
			name[i] = '/';
		}
		if(s) path[i] = name[i];
	}
	return path;
}

char *RelativePathToAbsolutePath(char *path) {
	if(!path) return NULL;
	if(path[0] == '/' || path[0] == '\\') return path;
	char *appath = CeGetApplicationPath();
	size_t len = strlen(appath);
	memmove(path + len, path, strlen(path) + 1);
	strncpy(path, appath, len);
	free(appath);
	return path;
}

char *PathToAbsolutePath(char *path) {
	return RelativePathToAbsolutePath(path);
}