int EiC_analyseCode(code_t *C)
{
/* returns the index to the last visited instruction */
block_t *block = NULL;
int nb = 0;
int i,j,rtn;
int *visit;
visit = calloc(sizeof(*visit),nextinst(C)+1);
block = realloc(block,(nb+1)*sizeof(*block));
block[nb++] = initblock(C,0,visit);
for(i=0;i<nb;++i) {
for(j=0;j<block[i].nb;++j) {
if(!visit[block[i].branch[j]]) {
block = realloc(block,(nb+1)*sizeof(*block));
block[nb++] = initblock(C,block[i].branch[j],visit);
} else
visit[block[i].branch[j]]++;
}
}
rtn = 0;
for(i=0;i<=nextinst(C);)
if(visit[i])
rtn = i++;
else if(i < nextinst(C) && instline(C,i)) {
EiC_warningerror("Unreachable code at line %d",instline(C,i));
for(;i<nextinst(C) && !visit[i];i++)
;
} else
i++;
EiC_peephole(C,visit);
/*******
for(i=0;i<nextinst(C);++i)
if(!visit[i])
setopcode(C,i,empty);
*******/
freeblock(block,nb);
free(visit);
return rtn;
}
/*starts SIGCHLD handling when signal method,
* handles background processes termination */
void initSignalHandlers(){
/* check that we are using signal method for detecting terminated children */
if (SIGNALDETECTION != 0){
initblock();
setChildSigHandler();
}
}
/**
* Decrypts a string. For any message, key, and seed, we have that
* <code>decrypt(crypt(msg, key, seed), key) == msg</code>.
* @param cyphertext: message to be decrypted (this must be the result of
a previous call to <code>crypt</code>.
* @param key: arbitrary binary string to be used as a key.
* @return The plaintext.
*/
static int decrypt (lua_State *L) {
size_t lcyphertext;
const char *cyphertext = luaL_checklstring(L, 1, &lcyphertext);
size_t lseed = cyphertext[0];
const char *seed = cyphertext+1;
int lblock;
char block[BLOCKSIZE+MAXKEY];
luaL_argcheck(L, lcyphertext >= lseed+1 && lseed <= BLOCKSIZE, 1,
"invalid cyphered string");
cyphertext += lseed+1;
lcyphertext -= lseed+1;
lblock = initblock(L, seed, lseed, block);
decodestream(L, cyphertext, lcyphertext, block, lblock);
return 1;
}
/**
* Encrypts a string. Uses the hash function md5 in CFB (Cipher-feedback
* mode).
* @param message: arbitrary binary string to be encrypted.
* @param key: arbitrary binary string to be used as a key.
* @param [seed]: optional arbitrary binary string to be used as a seed.
* if no seed is provided, the function uses the result of
* <code>time()</code> as a seed.
* @return The cyphertext (as a binary string).
*/
static int crypt (lua_State *L) {
size_t lmsg;
const char *msg = luaL_checklstring(L, 1, &lmsg);
size_t lseed;
const char *seed;
int lblock;
char block[BLOCKSIZE+MAXKEY];
checkseed(L);
seed = luaL_checklstring(L, 3, &lseed);
if (lseed > BLOCKSIZE)
luaL_error(L, "seed too long (> %d)", BLOCKSIZE);
/* put seed and seed length at the beginning of result */
block[0] = (char)lseed;
memcpy(block+1, seed, lseed);
lua_pushlstring(L, block, lseed+1); /* to concat with result */
lblock = initblock(L, seed, lseed, block);
codestream(L, msg, lmsg, block, lblock);
lua_concat(L, 2);
return 1;
}
void nextblock(){
copy(b1,b2);
initblock(b2);
}
void start(){
initscr();
srand(time(0));
init_background(0,0);
refresh();
keypad(stdscr,TRUE);
pthread_t keyboard; //键盘监听线程
int err = init_network(); //初始化网络模块
if(err!=0){
mvprintw(5,60,"Network model init failed!");
}
start:
initpanel(); //把两个panel清空
initblock(b1);initblock(b2);
printpanel(PANELSTARTX,PANELSTARTY);
err = pthread_create(&keyboard,NULL,keylistener,NULL);
if(err !=0){
printf("can't create thread keyboard listener!");
exit(1);
}
//main thread make the block moving down until the gameover
while(!over){
movemid();
if(caninput(b1)){ //可以放下当前块说明游戏未结束
while( canmovedown() ){ //直到不能下落位置
//继续下落
goahead();
//显示一次
printpanel(PANELSTARTX,PANELSTARTY);
usleep(sleeptime);
}
//save temp panel to preview panel and create new block
savetoprev();
printpanel(PANELSTARTX,PANELSTARTY);
//停止下落后要消除
eliminate();
//把下一个块替换上来
nextblock();
}
else
over=true;
}
attrset(COLOR_PAIR(7));
mvprintw(21,37,"YOU DEAD!Try again?(y/n):");
int input;
int quit = 1;
while(quit){
input=getch(); //判断用户还要不要玩下去
switch(input){
case 'y':
over = 0;
attrset(COLOR_PAIR(0));
mvprintw(21,37," ");
goto start; //重新开始
break;
case 'n': endwin();quit = 0;break;
default:
mvprintw(21,37,"YOU DEAD!Try again?(y/n):");
}
}
}
