void
freenode(obj *p) /* free space occupied by object p */
{
obj *q, *q1;
if (p->o_type == BLOCK) { /* I think there's */
freesymtab(p->o_val[N_VAL+1].s); /* a bug here, for */
q = p->o_val[N_VAL].o; /* nested blocks. */
p->o_prev->o_next = q->o_next;
q->o_next->o_prev = p->o_prev;
q->o_next = (obj *)NULL;
for (q = p->o_next; q != NULL; ) {
if (q->o_type == BLOCK)
freesymtab(q->o_val[N_VAL+1].s);
q1 = q;
q = q->o_next;
free(q1);
}
}
else {
p->o_prev->o_next = p->o_next;
p->o_next->o_prev = p->o_prev;
}
free (p);
if (!objbuf) redo_gbox = 1; /* page boundaries are now suspect */
}
Cell *adelete(Node **a, int n) /* a[0] is symtab, a[1] is list of subscripts */
{
Cell *x, *y;
Node *np;
char buf[RECSIZE], *s;
x = execute(a[0]); /* Cell* for symbol table */
if (!isarr(x))
return true;
if (a[1] == 0) { /* delete the elements, not the table */
freesymtab(x);
x->tval &= ~STR;
x->tval |= ARR;
x->sval = (char *) makesymtab(NSYMTAB);
} else {
buf[0] = 0;
for (np = a[1]; np; np = np->nnext) {
y = execute(np); /* subscript */
s = getsval(y);
strcat(buf, s);
if (np->nnext)
strcat(buf, *SUBSEP);
tempfree(y);
}
freeelem(x, buf);
}
tempfree(x);
return true;
}
Cell *awkdelete(Node **a, int n) /* a[0] is symtab, a[1] is list of subscripts */
{
Cell *x, *y;
Node *np;
char *s;
int nsub = strlen(*SUBSEP);
x = execute(a[0]); /* Cell* for symbol table */
if (!isarr(x))
return True;
if (a[1] == 0) { /* delete the elements, not the table */
freesymtab(x);
x->tval &= ~STR;
x->tval |= ARR;
x->sval = (char *) makesymtab(NSYMTAB);
} else {
int bufsz = recsize;
char *buf;
if ((buf = (char *) malloc(bufsz)) == NULL)
FATAL("out of memory in adelete");
buf[0] = 0;
for (np = a[1]; np; np = np->nnext) {
y = execute(np); /* subscript */
s = getsval(y);
if (!adjbuf(&buf, &bufsz, strlen(buf)+strlen(s)+nsub+1, recsize, 0, "awkdelete"))
FATAL("out of memory deleting %s[%s...]", x->nval, buf);
strcat(buf, s);
if (np->nnext)
strcat(buf, *SUBSEP);
tempfree(y);
}
freeelem(x, buf);
free(buf);
}
tempfree(x);
return True;
}
int
main(int argc, char *argv[])
{
Symtab *symtab;
Symbol *sym;
setpname(argv[0]);
if (argc > 1)
fprintf(stderr, "%s: unused arguments\n", getpname());
if ((symtab = makesymtab(0)) == NULL)
die(1, "failed to allocate symbol table:");
if ((sym = storesym(symtab, "foo")) == NULL)
die(1, "failed to insert lexem \"foo\":");
sym->symtype = S_IDENT;
if ((sym = storesym(symtab, "bar")) == NULL)
die(1, "failed to insert lexem \"bar\":");
sym->symtype = S_IDENT;
if ((sym = storesym(symtab, "baz")) == NULL)
die(1, "failed to insert lexem \"baz\":");
sym->symtype = S_IDENT;
if ((sym = findsym(symtab, "foo")) == NULL)
die(1, "couldn't find lexem \"foo\":");
if (sym->symtype != S_IDENT)
die(1, "symtype of \"foo\" is not S_IDENT");
sym->symtype = S_INTCONST;
if ((sym = findsym(symtab, "bar")) == NULL)
die(1, "couldn't find lexem \"bar\":");
if (sym->symtype != S_IDENT)
die(1, "%s: symtype of \"bar\" is not S_IDENT");
sym->symtype = S_INTCONST;
if ((sym = findsym(symtab, "baz")) == NULL)
die(1, "couldn't find lexem \"baz\":");
if (sym->symtype != S_IDENT)
die(1, "symtype of \"baz\" is not S_IDENT");
sym->symtype = S_INTCONST;
if ((sym = findsym(symtab, "foo")) == NULL)
die(1, "couldn't find lexem \"foo\":");
if (sym->symtype != S_INTCONST)
die(1, "symtype of \"foo\" is not S_INTCONST");
if ((sym = findsym(symtab, "bar")) == NULL)
die(1, "couldn't find lexem \"bar\":");
if (sym->symtype != S_INTCONST)
die(1, "symtype of \"bar\" is not S_INTCONST");
if ((sym = findsym(symtab, "baz")) == NULL)
die(1, "couldn't find lexem \"baz\":");
if (sym->symtype != S_INTCONST)
die(1, "symtype of \"baz\" is not S_INTCONST");
freesymtab(symtab);
return 0;
}
Cell *call(Node **a, int n) /* function call. very kludgy and fragile */
{
static Cell newcopycell = { OCELL, CCOPY, 0, (char *) "", 0.0, NUM|STR|DONTFREE };
int i, ncall, ndef;
Node *x;
Cell *args[NARGS], *oargs[NARGS], *y, *z, *fcn;
char *s;
fcn = execute(a[0]); /* the function itself */
s = fcn->nval;
if (!isfunc(fcn))
ERROR "calling undefined function %s", s FATAL;
if (frame == NULL) {
fp = frame = (struct Frame *) calloc(nframe += 100, sizeof(struct Frame));
if (frame == NULL)
ERROR "out of space for stack frames calling %s", s FATAL;
}
for (ncall = 0, x = a[1]; x != NULL; x = x->nnext) /* args in call */
ncall++;
ndef = (int) fcn->fval; /* args in defn */
dprintf( ("calling %s, %d args (%d in defn), fp=%d\n", s, ncall, ndef, fp-frame) );
if (ncall > ndef)
ERROR "function %s called with %d args, uses only %d",
s, ncall, ndef WARNING;
if (ncall + ndef > NARGS)
ERROR "function %s has %d arguments, limit %d", s, ncall+ndef, NARGS FATAL;
for (i = 0, x = a[1]; x != NULL; i++, x = x->nnext) { /* get call args */
dprintf( ("evaluate args[%d], fp=%d:\n", i, fp-frame) );
y = execute(x);
oargs[i] = y;
dprintf( ("args[%d]: %s %f <%s>, t=%o\n",
i, y->nval, y->fval, isarr(y) ? "(array)" : (char*) y->sval, y->tval) );
if (isfunc(y))
ERROR "can't use function %s as argument in %s", y->nval, s FATAL;
if (isarr(y))
args[i] = y; /* arrays by ref */
else
args[i] = copycell(y);
tempfree(y);
}
for ( ; i < ndef; i++) { /* add null args for ones not provided */
args[i] = gettemp();
*args[i] = newcopycell;
}
fp++; /* now ok to up frame */
if (fp >= frame + nframe) {
int dfp = fp - frame; /* old index */
frame = (struct Frame *)
realloc((char *) frame, (nframe += 100) * sizeof(struct Frame));
if (frame == NULL)
ERROR "out of space for stack frames in %s", s FATAL;
fp = frame + dfp;
}
fp->fcncell = fcn;
fp->args = args;
fp->nargs = ndef; /* number defined with (excess are locals) */
fp->retval = gettemp();
dprintf( ("start exec of %s, fp=%d\n", s, fp-frame) );
y = execute((Node *)(fcn->sval)); /* execute body */
dprintf( ("finished exec of %s, fp=%d\n", s, fp-frame) );
for (i = 0; i < ndef; i++) {
Cell *t = fp->args[i];
if (isarr(t)) {
if (t->csub == CCOPY) {
if (i >= ncall) {
freesymtab(t);
t->csub = CTEMP;
} else {
oargs[i]->tval = t->tval;
oargs[i]->tval &= ~(STR|NUM|DONTFREE);
oargs[i]->sval = t->sval;
tempfree(t);
}
}
} else if (t != y) { /* kludge to prevent freeing twice */
t->csub = CTEMP;
tempfree(t);
}
}
tempfree(fcn);
if (isexit(y) || isnext(y) || isnextfile(y))
return y;
tempfree(y); /* this can free twice! */
z = fp->retval; /* return value */
dprintf( ("%s returns %g |%s| %o\n", s, getfval(z), getsval(z), z->tval) );
fp--;
return(z);
}
Cell *split(Node **a, int nnn) /* split(a[0], a[1], a[2]); a[3] is type */
{
Cell *x = 0, *y, *ap;
char *s;
int sep;
char *t, temp, num[10], *fs = 0;
int n, tempstat;
y = execute(a[0]); /* source string */
s = getsval(y);
if (a[2] == 0) /* fs string */
fs = *FS;
else if ((int) a[3] == STRING) { /* split(str,arr,"string") */
x = execute(a[2]);
fs = getsval(x);
} else if ((int) a[3] == REGEXPR)
fs = (char*) "(regexpr)"; /* split(str,arr,/regexpr/) */
else
ERROR "illegal type of split()" FATAL;
sep = *fs;
ap = execute(a[1]); /* array name */
freesymtab(ap);
dprintf( ("split: s=|%s|, a=%s, sep=|%s|\n", s, ap->nval, fs) );
ap->tval &= ~STR;
ap->tval |= ARR;
ap->sval = (char *) makesymtab(NSYMTAB);
n = 0;
if ((*s != '\0' && strlen(fs) > 1) || (int) a[3] == REGEXPR) { /* reg expr */
fa *pfa;
if ((int) a[3] == REGEXPR) { /* it's ready already */
pfa = (fa *) a[2];
} else {
pfa = makedfa(fs, 1);
}
if (nematch(pfa,s)) {
tempstat = pfa->initstat;
pfa->initstat = 2;
do {
n++;
sprintf((char *)num, "%d", n);
temp = *patbeg;
*patbeg = '\0';
if (isnumber(s))
setsymtab(num, s, atof((char *)s), STR|NUM, (Array *) ap->sval);
else
setsymtab(num, s, 0.0, STR, (Array *) ap->sval);
*patbeg = temp;
s = patbeg + patlen;
if (*(patbeg+patlen-1) == 0 || *s == 0) {
n++;
sprintf((char *)num, "%d", n);
setsymtab(num, "", 0.0, STR, (Array *) ap->sval);
pfa->initstat = tempstat;
goto spdone;
}
} while (nematch(pfa,s));
}
n++;
sprintf((char *)num, "%d", n);
if (isnumber(s))
setsymtab(num, s, atof((char *)s), STR|NUM, (Array *) ap->sval);
else
setsymtab(num, s, 0.0, STR, (Array *) ap->sval);
spdone:
pfa = NULL;
} else if (sep == ' ') {
for (n = 0; ; ) {
while (*s == ' ' || *s == '\t' || *s == '\n')
s++;
if (*s == 0)
break;
n++;
t = s;
do
s++;
while (*s!=' ' && *s!='\t' && *s!='\n' && *s!='\0');
temp = *s;
*s = '\0';
sprintf((char *)num, "%d", n);
if (isnumber(t))
setsymtab(num, t, atof((char *)t), STR|NUM, (Array *) ap->sval);
else
setsymtab(num, t, 0.0, STR, (Array *) ap->sval);
*s = temp;
if (*s != 0)
s++;
}
} else if (sep == 0) { /* new: split(s, a, "") => 1 char/elem */
for (n = 0; *s != 0; s++) {
char buf[2];
n++;
sprintf((char *)num, "%d", n);
buf[0] = *s;
buf[1] = 0;
if (isdigit(buf[0]))
setsymtab(num, buf, atof(buf), STR|NUM, (Array *) ap->sval);
else
setsymtab(num, buf, 0.0, STR, (Array *) ap->sval);
}
} else if (*s != 0) {
for (;;) {
n++;
t = s;
while (*s != sep && *s != '\n' && *s != '\0')
s++;
temp = *s;
*s = '\0';
sprintf((char *)num, "%d", n);
if (isnumber(t))
setsymtab(num, t, atof((char *)t), STR|NUM, (Array *) ap->sval);
else
setsymtab(num, t, 0.0, STR, (Array *) ap->sval);
*s = temp;
if (*s++ == 0)
break;
}
}
tempfree(ap);
tempfree(y);
if (a[2] != 0 && (int) a[3] == STRING)
tempfree(x);
x = gettemp();
x->tval = NUM;
x->fval = n;
return(x);
}
Cell *split(Node **a, int nnn) /* split(a[0], a[1], a[2]); a[3] is type */
{
Cell *x = 0, *y, *ap;
char *s, *origs;
int sep;
char *t, temp, num[50], *fs = 0;
int n, tempstat, arg3type;
y = execute(a[0]); /* source string */
origs = s = strdup(getsval(y));
arg3type = ptoi(a[3]);
if (a[2] == 0) /* fs string */
fs = *FS;
else if (arg3type == STRING) { /* split(str,arr,"string") */
x = execute(a[2]);
fs = getsval(x);
} else if (arg3type == REGEXPR)
fs = "(regexpr)"; /* split(str,arr,/regexpr/) */
else
FATAL("illegal type of split");
sep = *fs;
ap = execute(a[1]); /* array name */
freesymtab(ap);
dprintf( ("split: s=|%s|, a=%s, sep=|%s|\n", s, NN(ap->nval), fs) );
ap->tval &= ~STR;
ap->tval |= ARR;
ap->sval = (char *) makesymtab(NSYMTAB);
n = 0;
if (arg3type == REGEXPR && strlen((char*)((fa*)a[2])->restr) == 0) {
/* split(s, a, //); have to arrange that it looks like empty sep */
arg3type = 0;
fs = "";
sep = 0;
}
if (*s != '\0' && (strlen(fs) > 1 || arg3type == REGEXPR)) { /* reg expr */
fa *pfa;
if (arg3type == REGEXPR) { /* it's ready already */
pfa = (fa *) a[2];
} else {
pfa = makedfa(fs, 1);
}
if (nematch(pfa,s)) {
tempstat = pfa->initstat;
pfa->initstat = 2;
do {
n++;
sprintf(num, "%d", n);
temp = *patbeg;
*patbeg = '\0';
if (is_number(s))
setsymtab(num, s, atof(s), STR|NUM, (Array *) ap->sval);
else
setsymtab(num, s, 0.0, STR, (Array *) ap->sval);
*patbeg = temp;
s = patbeg + patlen;
if (*(patbeg+patlen-1) == 0 || *s == 0) {
n++;
sprintf(num, "%d", n);
setsymtab(num, "", 0.0, STR, (Array *) ap->sval);
pfa->initstat = tempstat;
goto spdone;
}
} while (nematch(pfa,s));
pfa->initstat = tempstat; /* bwk: has to be here to reset */
/* cf gsub and refldbld */
}
n++;
sprintf(num, "%d", n);
if (is_number(s))
setsymtab(num, s, atof(s), STR|NUM, (Array *) ap->sval);
else
setsymtab(num, s, 0.0, STR, (Array *) ap->sval);
spdone:
pfa = NULL;
} else if (sep == ' ') {
for (n = 0; ; ) {
while (*s == ' ' || *s == '\t' || *s == '\n')
s++;
if (*s == 0)
break;
n++;
t = s;
do
s++;
while (*s!=' ' && *s!='\t' && *s!='\n' && *s!='\0');
temp = *s;
*s = '\0';
sprintf(num, "%d", n);
if (is_number(t))
setsymtab(num, t, atof(t), STR|NUM, (Array *) ap->sval);
else
setsymtab(num, t, 0.0, STR, (Array *) ap->sval);
*s = temp;
if (*s != 0)
s++;
}
} else if (sep == 0) { /* new: split(s, a, "") => 1 char/elem */
for (n = 0; *s != 0; s++) {
char buf[2];
n++;
sprintf(num, "%d", n);
buf[0] = *s;
buf[1] = 0;
if (isdigit((uschar)buf[0]))
setsymtab(num, buf, atof(buf), STR|NUM, (Array *) ap->sval);
else
setsymtab(num, buf, 0.0, STR, (Array *) ap->sval);
}
} else if (*s != 0) {
for (;;) {
n++;
t = s;
while (*s != sep && *s != '\n' && *s != '\0')
s++;
temp = *s;
*s = '\0';
sprintf(num, "%d", n);
if (is_number(t))
setsymtab(num, t, atof(t), STR|NUM, (Array *) ap->sval);
else
setsymtab(num, t, 0.0, STR, (Array *) ap->sval);
*s = temp;
if (*s++ == 0)
break;
}
}
tempfree(ap);
tempfree(y);
free(origs);
if (a[2] != 0 && arg3type == STRING) {
tempfree(x);
}
x = gettemp();
x->tval = NUM;
x->fval = n;
return(x);
}
