/*
** Calls a runtime capture. Returns number of captures removed by
** the call, including the initial Cgroup. (Captures to be added are
** on the Lua stack.)
*/
int runtimecap (CapState *cs, Capture *close, const char *s, int *rem) {
int n, id;
lua_State *L = cs->L;
int otop = lua_gettop(L);
Capture *open = findopen(close);
assert(captype(open) == Cgroup);
id = finddyncap(open, close); /* get first dynamic capture argument */
close->kind = Cclose; /* closes the group */
close->s = s;
cs->cap = open; cs->valuecached = 0; /* prepare capture state */
luaL_checkstack(L, 4, "too many runtime captures");
pushluaval(cs); /* push function to be called */
lua_pushvalue(L, SUBJIDX); /* push original subject */
lua_pushinteger(L, s - cs->s + 1); /* push current position */
n = pushnestedvalues(cs, 0); /* push nested captures */
lua_call(L, n + 2, LUA_MULTRET); /* call dynamic function */
if (id > 0) { /* are there old dynamic captures to be removed? */
int i;
for (i = id; i <= otop; i++)
lua_remove(L, id); /* remove old dynamic captures */
*rem = otop - id + 1; /* total number of dynamic captures removed */
}
else
*rem = 0; /* no dynamic captures removed */
return (int)(close - open); /* number of captures of all kinds removed */
}
int findwinner(int *i, int *j, int *val)
/* find opponent piece to capture or attack */
{
int m, n, ti[3], tj[3], tval, ct, u, v, lib1;
*i = -1; *j = -1; *val = -1;
/* find opponent with liberty less than four */
for (m = 0; m < 19; m++)
for (n = 0; n < 19; n++)
if ((p[m][n] == umove) && (l[m][n] < 4))
{
ct = 0;
initmark();
if (findopen(m, n, ti, tj, umove, l[m][n], &ct))
{
if (l[m][n] == 1)
{
if (*val < 120)
{
*val = 120;
*i = ti[0];
*j = tj[0];
}
}
else
for (u = 0; u < l[m][n]; u++)
for (v = 0; v < l[m][n]; v++)
if (u != v)
{
lib = 0;
countlib(ti[u], tj[u], mymove);
if (lib > 0) /* valid move */
{
lib1 = lib;
p[ti[u]][tj[u]] = mymove;
/* look ahead opponent move */
lib = 0;
countlib(ti[v], tj[v], umove);
if ((lib1 == 1) && (lib > 0))
tval = 0;
else
tval = 120 - 20 * lib;
if (*val < tval)
{
*val = tval;
*i = ti[u];
*j = tj[u];
}
p[ti[u]][tj[u]] = EMPTY;
}
}
}
}
if (*val > 0) /* find move */
return 1;
else /* fail to find winner */
return 0;
} /* end findwinner */
/*
** Try to find a named group capture with the name given at the top of
** the stack; goes backward from 'cap'.
*/
static Capture *findback (CapState *cs, Capture *cap) {
lua_State *L = cs->L;
while (cap-- > cs->ocap) { /* repeat until end of list */
if (isclosecap(cap))
cap = findopen(cap); /* skip nested captures */
else if (!isfullcap(cap))
continue; /* opening an enclosing capture: skip and get previous */
if (captype(cap) == Cgroup) {
getfromktable(cs, cap->idx); /* get group name */
if (lua_equal(L, -2, -1)) { /* right group? */
lua_pop(L, 2); /* remove reference name and group name */
return cap;
}
else lua_pop(L, 1); /* remove group name */
}
}
luaL_error(L, "back reference '%s' not found", lua_tostring(L, -1));
return NULL; /* to avoid warnings */
}
int
main(int argc, register char** argv)
{
register int n;
register char* s;
char* args;
char* codes;
char** av;
char** ap;
int i;
int count;
int len;
int traverse;
int size;
Dir_t* firstdir;
Dir_t* lastdir;
Exnode_t* x;
Exnode_t* y;
Ftw_t ftw;
Finddisc_t disc;
setlocale(LC_ALL, "");
error_info.id = "tw";
av = argv + 1;
args = 0;
codes = 0;
count = 0;
size = 0;
traverse = 1;
firstdir = lastdir = newof(0, Dir_t, 1, 0);
firstdir->name = ".";
state.action = LIST;
state.cmdflags = CMD_EXIT|CMD_IGNORE|CMD_IMPLICIT|CMD_NEWLINE;
state.errexit = EXIT_QUIT;
state.ftwflags = ftwflags()|FTW_DELAY;
state.select = ALL;
state.separator = '\n';
memset(&disc, 0, sizeof(disc));
for (;;)
{
switch (optget(argv, usage))
{
case 'a':
args = opt_info.arg;
state.cmdflags |= CMD_POST;
continue;
case 'c':
if ((count = opt_info.num) < 0)
error(3, "argument count must be >= 0");
continue;
case 'd':
lastdir = lastdir->next = newof(0, Dir_t, 1, 0);
lastdir->name = opt_info.arg;
continue;
case 'e':
compile(opt_info.arg, 0);
continue;
case 'f':
state.pattern = opt_info.arg;
continue;
case 'i':
state.ignore = 1;
continue;
case 'l':
state.localfs = 1;
continue;
case 'm':
state.intermediate = 1;
continue;
case 'n':
traverse = 0;
continue;
case 'p':
state.ftwflags |= FTW_TWICE;
continue;
case 'q':
state.cmdflags |= CMD_QUERY;
continue;
case 'r':
state.ftwflags |= FTW_RECURSIVE;
continue;
case 's':
if ((size = opt_info.num) < 0)
error(3, "command size must be >= 0");
continue;
case 't':
state.cmdflags |= CMD_TRACE;
continue;
case 'x':
state.errexit = opt_info.arg ? opt_info.num : EXIT_QUIT;
continue;
case 'z':
if (s = sfgetr(sfstdin, '\n', 1))
{
if (!(s = strdup(s)))
error(ERROR_SYSTEM|3, "out of space");
n = state.snapshot.format.delim = *s++;
state.snapshot.format.path = s;
if (!(s = strchr(s, n)))
{
osnap:
error(3, "invalid snapshot on standard input");
}
*s++ = 0;
if (!streq(state.snapshot.format.path, SNAPSHOT_ID))
goto osnap;
state.snapshot.format.path = s;
if (!(s = strchr(s, n)))
goto osnap;
*s++ = 0;
state.snapshot.format.easy = s;
if (!(s = strchr(s, n)))
goto osnap;
*s++ = 0;
if (*(state.snapshot.format.hard = s))
{
if (!(s = strchr(s, n)))
goto osnap;
*s = 0;
}
else
state.snapshot.format.hard = 0;
state.snapshot.sp = sfstdin;
state.snapshot.prev = sfgetr(sfstdin, '\n', 0);
}
else
{
state.snapshot.format.path = SNAPSHOT_PATH;
state.snapshot.format.easy = SNAPSHOT_EASY;
state.snapshot.format.hard = SNAPSHOT_HARD;
state.snapshot.format.delim = SNAPSHOT_DELIM[0];
}
if (!(state.snapshot.tmp = sfstropen()))
error(ERROR_SYSTEM|3, "out of space");
compile("sort:name;", 0);
continue;
case 'C':
state.ftwflags |= FTW_NOSEEDOTDIR;
continue;
case 'D':
error_info.trace = -opt_info.num;
continue;
case 'E':
compile(opt_info.arg, 1);
continue;
case 'F':
codes = opt_info.arg;
continue;
case 'G':
disc.flags |= FIND_GENERATE;
if (streq(opt_info.arg, "old"))
disc.flags |= FIND_OLD;
else if (streq(opt_info.arg, "gnu") || streq(opt_info.arg, "locate"))
disc.flags |= FIND_GNU;
else if (streq(opt_info.arg, "type"))
disc.flags |= FIND_TYPE;
else if (streq(opt_info.arg, "?"))
{
error(2, "formats are { default|dir type old gnu|locate }");
return 0;
}
else if (!streq(opt_info.arg, "-") && !streq(opt_info.arg, "default") && !streq(opt_info.arg, "dir"))
error(3, "%s: invalid find codes format -- { default|dir type old gnu|locate } expected", opt_info.arg);
continue;
case 'H':
state.ftwflags |= FTW_META|FTW_PHYSICAL;
continue;
case 'I':
state.icase = 1;
continue;
case 'L':
state.ftwflags &= ~(FTW_META|FTW_PHYSICAL|FTW_SEEDOTDIR);
continue;
case 'P':
state.ftwflags &= ~FTW_META;
state.ftwflags |= FTW_PHYSICAL;
continue;
case 'S':
state.separator = *opt_info.arg;
continue;
case 'X':
state.ftwflags |= FTW_MOUNT;
continue;
case '?':
error(ERROR_USAGE|4, "%s", opt_info.arg);
continue;
case ':':
error(2, "%s", opt_info.arg);
continue;
}
break;
}
argv += opt_info.index;
argc -= opt_info.index;
if (error_info.errors)
error(ERROR_USAGE|4, "%s", optusage(NiL));
/*
* do it
*/
if (state.snapshot.tmp)
sfprintf(sfstdout, "%c%s%c%s%c%s%c%s%c\n",
state.snapshot.format.delim, SNAPSHOT_ID,
state.snapshot.format.delim, state.snapshot.format.path,
state.snapshot.format.delim, state.snapshot.format.easy,
state.snapshot.format.delim, state.snapshot.format.hard ? state.snapshot.format.hard : "",
state.snapshot.format.delim);
if (x = exexpr(state.program, "begin", NiL, 0))
eval(x, NiL);
if ((x = exexpr(state.program, "select", NiL, INTEGER)) || (x = exexpr(state.program, NiL, NiL, INTEGER)))
state.select = x;
if (!(state.ftwflags & FTW_PHYSICAL))
state.ftwflags &= ~FTW_DELAY;
memset(&ftw, 0, sizeof(ftw));
ftw.path = ftw.name = "";
if (traverse)
{
if (x = exexpr(state.program, "action", NiL, 0))
state.action = x;
if (x = exexpr(state.program, "sort", NiL, 0))
{
state.sortkey = x;
y = 0;
for (;;)
{
switch (x->op)
{
case ',':
y = x->data.operand.right;
/*FALLTHROUGH*/
case '!':
case '~':
case S2B:
case X2I:
x = x->data.operand.left;
continue;
case ID:
if (!(x = y))
break;
y = 0;
continue;
default:
error(3, "invalid sort identifier (op 0x%02x)", x->op);
break;
}
break;
}
state.sort = order;
}
if (*argv && (*argv)[0] == '-' && (*argv)[1] == 0)
{
state.ftwflags |= FTW_LIST;
argv++;
argc--;
}
if (*argv || args || count || !(state.cmdflags & CMD_IMPLICIT))
{
Cmddisc_t disc;
CMDDISC(&disc, state.cmdflags, errorf);
state.cmd = cmdopen(argv, count, size, args, &disc);
state.ftwflags |= FTW_DOT;
}
else
state.cmdflags &= ~CMD_IMPLICIT;
if (codes && (disc.flags & FIND_GENERATE))
{
char* p;
Dir_t* dp;
char pwd[PATH_MAX];
char tmp[PATH_MAX];
disc.version = FIND_VERSION;
if (state.cmdflags & CMD_TRACE)
disc.flags |= FIND_TYPE;
if (state.cmdflags & CMD_QUERY)
disc.flags |= FIND_OLD;
disc.errorf = errorf;
if (!(state.find = findopen(codes, NiL, NiL, &disc)))
exit(2);
if (disc.flags & FIND_TYPE)
{
state.act = ACT_CODETYPE;
compile("_tw_init:mime;", 0);
state.magicdisc.flags |= MAGIC_MIME;
}
else
state.act = ACT_CODE;
state.icase = 1;
state.pattern = 0;
state.sort = order;
if (!state.program)
compile("1", 0);
if (!(state.sortkey = newof(0, Exnode_t, 1, 0)) || !(state.sortkey->data.variable.symbol = (Exid_t*)dtmatch(state.program->symbols, "name")))
error(ERROR_SYSTEM|3, "out of space");
state.sortkey->op = ID;
s = p = 0;
for (dp = (firstdir == lastdir) ? firstdir : firstdir->next; dp; dp = dp->next)
{
if (*(s = dp->name) == '/')
sfsprintf(tmp, sizeof(tmp), "%s", s);
else if (!p && !(p = getcwd(pwd, sizeof(pwd))))
error(ERROR_SYSTEM|3, "cannot determine pwd path");
else
sfsprintf(tmp, sizeof(tmp), "%s/%s", p, s);
pathcanon(tmp, sizeof(tmp), PATH_PHYSICAL);
if (!(dp->name = strdup(tmp)))
error(ERROR_SYSTEM|3, "out of space [PATH_PHYSICAL]");
}
}
else if (state.snapshot.tmp)
state.act = ACT_SNAPSHOT;
else if (state.cmdflags & CMD_IMPLICIT)
state.act = ACT_CMDARG;
else if (state.action == LIST)
state.act = ACT_LIST;
else if (state.action)
state.act = ACT_EVAL;
if (state.intermediate)
{
state.actII = state.act;
state.act = ACT_INTERMEDIATE;
}
if (state.pattern)
{
disc.version = FIND_VERSION;
if (state.icase)
disc.flags |= FIND_ICASE;
disc.errorf = errorf;
disc.dirs = ap = av;
if (firstdir != lastdir)
firstdir = firstdir->next;
do {*ap++ = firstdir->name;} while (firstdir = firstdir->next);
*ap = 0;
if (!(state.find = findopen(codes, state.pattern, NiL, &disc)))
exit(1);
state.ftwflags |= FTW_TOP;
n = state.select == ALL ? state.act : ACT_EVAL;
while (s = findread(state.find))
{
switch (n)
{
case ACT_CMDARG:
if ((i = cmdarg(state.cmd, s, strlen(s))) >= state.errexit)
exit(i);
break;
case ACT_LIST:
sfputr(sfstdout, s, '\n');
break;
default:
ftwalk(s, tw, state.ftwflags, NiL);
break;
}
}
}
else if (state.ftwflags & FTW_LIST)
{
sfopen(sfstdin, NiL, "rt");
n = state.select == ALL && state.act == ACT_CMDARG;
for (;;)
{
if (s = sfgetr(sfstdin, state.separator, 1))
len = sfvalue(sfstdin) - 1;
else if (state.separator != '\n')
{
state.separator = '\n';
continue;
}
else if (s = sfgetr(sfstdin, state.separator, -1))
len = sfvalue(sfstdin);
else
break;
if (!n)
ftwalk(s, tw, state.ftwflags, NiL);
else if ((i = cmdarg(state.cmd, s, len)) >= state.errexit)
exit(i);
}
if (sferror(sfstdin))
error(ERROR_SYSTEM|2, "input read error");
}
else if (firstdir == lastdir)
ftwalk(firstdir->name, tw, state.ftwflags, state.sort);
else
{
ap = av;
while (firstdir = firstdir->next)
*ap++ = firstdir->name;
*ap = 0;
ftwalk((char*)av, tw, state.ftwflags|FTW_MULTIPLE, state.sort);
}
if (state.cmd && (i = cmdflush(state.cmd)) >= state.errexit)
exit(i);
if (state.find && (findclose(state.find) || state.finderror))
exit(2);
}
else if (state.select)
error_info.errors = eval(state.select, &ftw) == 0;
if (x = exexpr(state.program, "end", NiL, 0))
eval(x, &ftw);
if (sfsync(sfstdout))
error(ERROR_SYSTEM|2, "write error");
exit(error_info.errors != 0);
}
