Stroka RealLocation(const Stroka& path) {
if (isexist(~path))
return RealPath(path);
Stroka dirpath = GetDirName(path);
if (isexist(~dirpath))
return RealPath(dirpath) + GetDirectorySeparatorS() + GetFileNameComponent(~path);
ythrow TFileError() << "RealLocation failed \"" << path << "\"";
}
//10.<赋值语句>—> id = <表达式> ；
void assignment(){
char varname[MAXIDLEN];
strcpy(varname, token);
Val v2 = Val(1, GetIdByName(varname));
match(id);
if (!isexist(varname)){
strcpy(token, varname);
error(46);
}
match(equl);
Val v = expression();
match(semicolon);
quadruples.push_back(Quadruple(sno++, equl, v, v2));
//生成四元式
/*printf("%3d （=，", sno++);
if (v.type == 1) printf("%s", GetNameByID(v.value1));
else if (v.type == 0) printf("%d", v.value1);
else if (v.type == 2) printf("%lf", v.value2);
else printf("t%d", v.value1);
printf("，%s）\n", varname);*/
}
bool CAgencyInfoRetriver::Init(const Stroka& strDoc2AgFile)
{
if (!strDoc2AgFile.empty() && isexist(strDoc2AgFile.c_str()))
m_DocId2AgNameFile = TFile(strDoc2AgFile.c_str(), OpenExisting | RdOnly);
return true;
}
int fifo(int* arr, int size) {
int pages_size=MEM_SIZE/PAGE_SIZE;
PAGE* pages=(PAGE*)malloc(sizeof(PAGE)*pages_size);
int fault_count=0;
int victim_frame=0;
memset(pages,-1,sizeof(PAGE)*pages_size);
int i;
for(i=0; i<size; i++) {
int frame_num=arr[i]/1024;
#ifdef ADDR_DEBUG
fprintf(stdout,"Logical Address: %i\n",arr[i]);
fprintf(stdout,"Frame number: %d\n",getPageNumber(arr[i]));
fprintf(stdout,"Before frame number: %d\n",frame_num);
#endif
if(!isexist(pages, pages_size, frame_num)) {
fault_count++;
pages[victim_frame].page_num=frame_num;
pages[victim_frame].recently_used=0;
victim_frame++;
if(victim_frame>pages_size) {
victim_frame=0;
}
}
}
free(pages);
return fault_count;
}
int lru(int* arr, int size) {
int pages_size=MEM_SIZE/PAGE_SIZE;
PAGE* pages=(PAGE*)malloc(sizeof(PAGE)*pages_size);
int fault_count=0;
int victim_frame=0;
memset(pages,-1,sizeof(PAGE)*pages_size);
int i;
for(i=0; i<size; i++) {
int frame_num=arr[i]/1024;
#ifdef LRU_DEBUG
fprintf(stdout,"[LRU] Page %d required\n",frame_num);
#endif
if(!isexist(pages, pages_size, frame_num)) {
#ifdef LRU_DEBUG
fprintf(stdout,"[LRU] Page %d does not exists\n",frame_num);
#endif
fault_count++;
int j;
int high_value=0;
for(j=0; j<pages_size; j++) {
int temp=i-pages[j].recently_used;
#ifdef LRU_DEBUG
fprintf(stdout,"[LRU] Page %d unused time %d\n",pages[j].page_num,temp);
#endif
if(temp>high_value) {
victim_frame=j;
high_value=temp;
}
}
#ifdef LRU_DEBUG
fprintf(stdout,"[LRU] Victim page %d will be changed with page %d\n",pages[victim_frame].page_num, frame_num);
#endif
pages[victim_frame].page_num=frame_num;
pages[victim_frame].recently_used=i;
}else {
#ifdef LRU_DEBUG
fprintf(stdout,"[LRU] Page %d exists\n",frame_num);
#endif
int j;
for(j=0; j<size; j++) {
if(pages[j].page_num==frame_num) {
pages[j].recently_used=i;
break;
}
}
}
}
free(pages);
return fault_count;
}
//12.<传递参数>—> id [ , id ]| ε
void passparameter(char funname[]){
vector<int> tmptypes;//实参类型序列
char varname[MAXIDLEN];
strcpy(varname, token);
if (lookahead==id){
match(id);
if (!isexist(varname)){
strcpy(token, varname);
error(46);
}
int tmptype = FindTypeByName(varname);
tmptypes.push_back(tmptype);
while (lookahead == comma){
match(comma);
strcpy(varname, token);
match(id);
if (!isexist(varname)){
strcpy(token, varname);
error(46);
}
tmptype = FindTypeByName(varname);
tmptypes.push_back(tmptype);
}
int callfuncId = FindIdByName(funname);
if (tmptypes.size() != funtabs[callfuncId].para.size()){
error(51);
}
else{
for (int i = 0; i < tmptypes.size(); i++){
if (tmptypes[i] != funtabs[callfuncId].para[i]){
error(52);
}
}
}
}
}
static inline bool FreeBSDGuessExecPath(const Stroka& guessPath, Stroka& execPath) {
if (isexist(~guessPath)) {
// now it should work for real
execPath = FreeBSDGetExecPath();
if (RealPath(execPath) == RealPath(guessPath)) {
return true;
}
}
return false;
}
//初始化函数，检查是否有root，是否用户，没有则默认添加一个用户 ：xiaosa,密码：123456
int runfirst()
{
//检查root的i-node和Memory Manager的inode是否存在
int path = 0;
bool memory = isexist(path);
if(memory)
{
return 1;
}
else
return -1;
}
//8.<输入语句>—> input id [ , id ] ；
void inputStatement(){
match(input);
char varname[MAXIDLEN];
strcpy(varname, token);
match(id);
if (!isexist(varname)){
strcpy(token, varname);
error(46);
}
while (lookahead == comma){
match(comma);
strcpy(varname, token);
match(id);
if (!isexist(varname)){
strcpy(token, varname);
error(46);
}
}
match(semicolon);
}
//17.<因子>—> id | con | deci | (<表达式>)
Val Factor(){
Val val;
if (lookahead == id){
val.type = 1;//变量
char varname[MAXIDLEN];
strcpy(varname, token);
match(id);
if (!isexist(varname)){
strcpy(token, varname);
error(46);
}
val.value1 = GetIdByName(varname);
}
else if (lookahead == con){
val.type = 0;//整数
val.value1 = atoi(token);
match(con);
}
else if (lookahead == deci){
val.type = 2;//小数
val.value2 = atof(token);
match(deci);
}
else if (lookahead == LP){
match(LP);
val = expression();
match(RP);
}
else {
error(24);
}
return val;
}
void CheckIsExist(const char *path) {
if (!isexist(path)) {
ythrow yexception() << "File or dir " << path << " does not exist";
}
}
bool PathExists(const Stroka& path) {
VERIFY(path.find('\0') == Stroka::npos);
return isexist(~path);
}