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int
do_split(TARG,spat,limit,gimme,arglast)
STR *TARG;
register SPAT *spat;
register int limit;
int gimme;
int *arglast;
{
register ARRAY *ary = stack;
STR **st = ary->ary_array;
register int sp = arglast[0] + 1;
register char *s = str_get(st[sp]);
char *strend = s + st[sp--]->str_cur;
register STR *dstr;
register char *m;
int iters = 0;
int maxiters = (strend - s) + 10;
int i;
char *orig;
int origlimit = limit;
int realarray = 0;
if (!spat || !s)
fatal("panic: do_split");
else if (spat->spat_runtime) {
nointrp = "|)";
sp = eval(spat->spat_runtime,G_SCALAR,sp);
st = stack->ary_array;
m = str_get(dstr = st[sp--]);
nointrp = "";
if (*m == ' ' && dstr->str_cur == 1) {
str_set(dstr,"\\s+");
m = dstr->str_ptr;
spat->spat_flags |= SPAT_SKIPWHITE;
}
if (spat->spat_regexp) {
regfree(spat->spat_regexp);
spat->spat_regexp = Null(REGEXP*); /* avoid possible double free */
}
spat->spat_regexp = regcomp(m,m+dstr->str_cur,
spat->spat_flags & SPAT_FOLD);
if (spat->spat_flags & SPAT_KEEP ||
(spat->spat_runtime->arg_type == O_ITEM &&
(spat->spat_runtime[1].arg_type & A_MASK) == A_SINGLE) ) {
arg_free(spat->spat_runtime); /* it won't change, so */
spat->spat_runtime = Nullarg; /* no point compiling again */
}
}
#ifdef DEBUGGING
if (debug & 8) {
deb("2.SPAT /%s/\n",spat->spat_regexp->precomp);
}
#endif
ary = stab_xarray(spat->spat_repl[1].arg_ptr.arg_stab);
if (ary && (gimme != G_ARRAY || (spat->spat_flags & SPAT_ONCE))) {
realarray = 1;
if (!(ary->ary_flags & ARF_REAL)) {
ary->ary_flags |= ARF_REAL;
for (i = ary->ary_fill; i >= 0; i--)
ary->ary_array[i] = Nullstr; /* don't free mere refs */
}
ary->ary_fill = -1;
sp = -1; /* temporarily switch stacks */
}
else
ary = stack;
orig = s;
if (spat->spat_flags & SPAT_SKIPWHITE) {
while (isSPACE(*s))
s++;
}
if (!limit)
limit = maxiters + 2;
if (strEQ("\\s+",spat->spat_regexp->precomp)) {
while (--limit) {
/*SUPPRESS 530*/
for (m = s; m < strend && !isSPACE(*m); m++) ;
if (m >= strend)
break;
dstr = Str_new(30,m-s);
str_nset(dstr,s,m-s);
if (!realarray)
str_2mortal(dstr);
(void)astore(ary, ++sp, dstr);
/*SUPPRESS 530*/
for (s = m + 1; s < strend && isSPACE(*s); s++) ;
}
}
else if (strEQ("^",spat->spat_regexp->precomp)) {
while (--limit) {
/*SUPPRESS 530*/
for (m = s; m < strend && *m != '\n'; m++) ;
m++;
if (m >= strend)
break;
dstr = Str_new(30,m-s);
str_nset(dstr,s,m-s);
if (!realarray)
str_2mortal(dstr);
(void)astore(ary, ++sp, dstr);
s = m;
}
}
else if (spat->spat_short) {
i = spat->spat_short->str_cur;
if (i == 1) {
int fold = (spat->spat_flags & SPAT_FOLD);
i = *spat->spat_short->str_ptr;
if (fold && isUPPER(i))
i = tolower(i);
while (--limit) {
if (fold) {
for ( m = s;
m < strend && *m != i &&
(!isUPPER(*m) || tolower(*m) != i);
m++) /*SUPPRESS 530*/
;
}
else /*SUPPRESS 530*/
for (m = s; m < strend && *m != i; m++) ;
if (m >= strend)
break;
dstr = Str_new(30,m-s);
str_nset(dstr,s,m-s);
if (!realarray)
str_2mortal(dstr);
(void)astore(ary, ++sp, dstr);
s = m + 1;
}
}
else {
#ifndef lint
while (s < strend && --limit &&
(m=fbminstr((unsigned char*)s, (unsigned char*)strend,
spat->spat_short)) )
#endif
{
dstr = Str_new(31,m-s);
str_nset(dstr,s,m-s);
if (!realarray)
str_2mortal(dstr);
(void)astore(ary, ++sp, dstr);
s = m + i;
}
}
}
else {
maxiters += (strend - s) * spat->spat_regexp->nparens;
while (s < strend && --limit &&
regexec(spat->spat_regexp, s, strend, orig, 1, Nullstr, TRUE) ) {
if (spat->spat_regexp->subbase
&& spat->spat_regexp->subbase != orig) {
m = s;
s = orig;
orig = spat->spat_regexp->subbase;
s = orig + (m - s);
strend = s + (strend - m);
}
m = spat->spat_regexp->startp[0];
dstr = Str_new(32,m-s);
str_nset(dstr,s,m-s);
if (!realarray)
str_2mortal(dstr);
(void)astore(ary, ++sp, dstr);
if (spat->spat_regexp->nparens) {
for (i = 1; i <= spat->spat_regexp->nparens; i++) {
s = spat->spat_regexp->startp[i];
m = spat->spat_regexp->endp[i];
dstr = Str_new(33,m-s);
str_nset(dstr,s,m-s);
if (!realarray)
str_2mortal(dstr);
(void)astore(ary, ++sp, dstr);
}
}
s = spat->spat_regexp->endp[0];
}
}
if (realarray)
iters = sp + 1;
else
iters = sp - arglast[0];
if (iters > maxiters)
fatal("Split loop");
if (s < strend || origlimit) { /* keep field after final delim? */
dstr = Str_new(34,strend-s);
str_nset(dstr,s,strend-s);
if (!realarray)
str_2mortal(dstr);
(void)astore(ary, ++sp, dstr);
iters++;
}
else {
#ifndef I286x
while (iters > 0 && ary->ary_array[sp]->str_cur == 0)
iters--,sp--;
#else
char *zaps;
int zapb;
if (iters > 0) {
zaps = str_get(afetch(ary,sp,FALSE));
zapb = (int) *zaps;
}
while (iters > 0 && (!zapb)) {
iters--,sp--;
if (iters > 0) {
zaps = str_get(afetch(ary,iters-1,FALSE));
zapb = (int) *zaps;
}
}
#endif
}
if (realarray) {
ary->ary_fill = sp;
if (gimme == G_ARRAY) {
sp++;
astore(stack, arglast[0] + 1 + sp, Nullstr);
Copy(ary->ary_array, stack->ary_array + arglast[0] + 1, sp, STR*);
return arglast[0] + sp;
}
}
else {
if (gimme == G_ARRAY)
return sp;
}
sp = arglast[0] + 1;
str_numset(TARG,(double)iters);
STABSET(TARG);
st[sp] = TARG;
return sp;
}
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