NODE *lreadchars(NODE *args)
{
unsigned int c, i;
char *strhead, *strptr;
NODETYPES type = STRING;
c = (unsigned int)getint(pos_int_arg(args));
if (stopping_flag == THROWING) return UNBOUND;
charmode_on();
input_blocking++;
#ifndef TIOCSTI
if (!setjmp(iblk_buf))
#endif
{
strhead = malloc((size_t)(c + 2));
strptr = strhead + 1;
fread(strptr, 1, (int)c, readstream);
setstrrefcnt(strhead, 0);
}
input_blocking = 0;
#ifndef TIOCSTI
if (stopping_flag == THROWING) return(UNBOUND);
#endif
if (feof(readstream)) {
free(strhead);
return(NIL);
}
for (i = 0; i < c; i++)
if (getparity(strptr[i])) type = BACKSLASH_STRING;
return(make_strnode(strptr, strhead, (int)c, type, strnzcpy));
}
NODE *lvbarredp(NODE *args) {
char i;
NODE *arg;
arg = char_arg(args);
if (NOT_THROWING) {
i = *getstrptr(arg);
return torf(getparity(i));
}
return(UNBOUND);
}
NODE *lreadchar(NODE *args) {
#ifdef WIN32
MSG msg;
#endif /* WIN32 */
char c;
if (readchar_lookahead_buf >= 0) {
c = (char)readchar_lookahead_buf;
readchar_lookahead_buf = -1;
return(make_strnode((char *)&c, (struct string_block *)NULL, 1,
(getparity(c) ? BACKSLASH_STRING : STRING), strnzcpy));
}
charmode_on();
input_blocking++;
#ifdef HAVE_WX
if (interactive && readstream==stdin) {
reading_char_now = 1;
c = getFromWX();
reading_char_now = 0;
}
else
c = (char)getc(readstream);
#else
#ifndef TIOCSTI
if (!setjmp(iblk_buf))
#endif
{
#ifdef mac
csetmode(C_RAW, stdin);
while ((c = (char)getc(readstream)) == EOF && readstream == stdin);
csetmode(C_ECHO, stdin);
#else /* !mac */
#ifdef ibm
if (interactive && readstream==stdin)
#ifndef WIN32
c = (char)getch();
#else /* WIN32 */
{
win32_update_text();
if (!char_avail)
while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
if (char_avail)
break;
}
c = buffered_char;
char_avail = 0;
}
#endif /* WIN32 */
else
NODE *lreadchar()
{
char c;
charmode_on();
input_blocking++;
#ifndef TIOCSTI
if (!setjmp(iblk_buf))
#endif
#ifdef mac
csetmode(C_RAW, stdin);
while ((c = (char)getc(readstream)) == EOF && readstream == stdin);
csetmode(C_ECHO, stdin);
#else
#ifdef ibm
if (interactive && readstream==stdin)
c = (char)getch();
else
c = (char)getc(readstream);
if (c == 17) { /* control-q */
to_pending = 0;
err_logo(STOP_ERROR,NIL);
}
if (c == 23) { /* control-w */
logo_pause();
return(lreadchar());
}
#else
c = (char)getc(readstream);
#endif
#endif
input_blocking = 0;
if (feof(readstream)) {
return(NIL);
}
return(make_strnode(&c, (char *)NULL, 1,
(getparity(c) ? STRING : BACKSLASH_STRING), strnzcpy));
}
NODE *runparse_node(NODE *nd, NODE **ndsptr) {
NODE *outline = NIL, *tnode = NIL, *lastnode = NIL, *snd;
char *wptr, *tptr;
struct string_block *whead;
int wlen, wcnt, tcnt, isnumb, gotdot;
NODETYPES wtyp;
BOOLEAN monadic_minus = FALSE;
if (nd == Minus_Tight) return cons(nd, NIL);
snd = cnv_node_to_strnode(nd);
wptr = getstrptr(snd);
wlen = getstrlen(snd);
wtyp = nodetype(snd);
wcnt = 0;
whead = getstrhead(snd);
while (wcnt < wlen) {
if (*wptr == ';') {
*ndsptr = NIL;
break;
}
if (*wptr == '"') {
tcnt = 0;
tptr = ++wptr;
wcnt++;
while (wcnt < wlen && !parens(*wptr)) {
if (wtyp == BACKSLASH_STRING && getparity(*wptr))
wtyp = PUNBOUND; /* flag for "\( case */
wptr++, wcnt++, tcnt++;
}
if (wtyp == PUNBOUND) {
wtyp = BACKSLASH_STRING;
tnode = cons(make_quote(intern(make_strnode(tptr, NULL,
tcnt, wtyp, noparity_strnzcpy))), NIL);
} else
tnode = cons(make_quote(intern(make_strnode(tptr, whead, tcnt,
wtyp, strnzcpy))), NIL);
} else if (*wptr == ':') {
tcnt = 0;
tptr = ++wptr;
wcnt++;
while (wcnt < wlen && !parens(*wptr) && !infixs(*wptr))
wptr++, wcnt++, tcnt++;
tnode = cons(make_colon(intern(make_strnode(tptr, whead, tcnt,
wtyp, strnzcpy))), NIL);
} else if (wcnt == 0 && *wptr == '-' && monadic_minus == FALSE &&
wcnt+1 < wlen && !white_space(*(wptr+1))) {
/* minus sign with space before and no space after is unary */
tnode = cons(make_intnode((FIXNUM)0), NIL);
monadic_minus = TRUE;
} else if (parens(*wptr) || infixs(*wptr)) {
if (monadic_minus)
tnode = cons(Minus_Tight, NIL);
else if (wcnt+1 < wlen &&
((*wptr == '<' && (*(wptr+1) == '=' || *(wptr+1) == '>'))
|| (*wptr == '>' && *(wptr+1) == '='))) {
tnode = cons(intern(make_strnode(wptr, whead, 2,
STRING, strnzcpy)), NIL);
wptr++, wcnt++;
} else
tnode = cons(intern(make_strnode(wptr, whead, 1,
STRING, strnzcpy)), NIL);
monadic_minus = FALSE;
wptr++, wcnt++;
} else {
tcnt = 0;
tptr = wptr;
/* isnumb 4 means nothing yet;
* 0 means digits so far, 1 means just saw
* 'e' so minus can be next, 2 means no longer
* eligible even if an 'e' comes along */
isnumb = 4;
gotdot = 0;
if (*wptr == '?') {
isnumb = 3; /* turn ?5 to (? 5) */
wptr++, wcnt++, tcnt++;
}
while (wcnt < wlen && !parens(*wptr) &&
(!infixs(*wptr) || (isnumb == 1 && (*wptr == '-' || *wptr == '+')))) {
if (isnumb == 4 && isdigit(*wptr)) isnumb = 0;
if (isnumb == 0 && tcnt > 0 && (*wptr == 'e' || *wptr == 'E'))
isnumb = 1;
else if (!(isdigit(*wptr) || (!gotdot && *wptr == '.')) || isnumb == 1)
isnumb = 2;
if (*wptr == '.') gotdot++;
wptr++, wcnt++, tcnt++;
}
if (isnumb == 3 && tcnt > 1) { /* ?5 syntax */
NODE *qmtnode;
qmtnode = cons_list(0, Left_Paren, Query,
cnv_node_to_numnode
(make_strnode(tptr+1, whead,
tcnt-1, wtyp, strnzcpy)),
END_OF_LIST);
if (outline == NIL) {
outline = qmtnode;
} else {
setcdr(lastnode, qmtnode);
}
lastnode = cddr(qmtnode);
tnode = cons(Right_Paren, NIL);
} else if (isnumb < 2 && tcnt > 0) {
tnode = cons(cnv_node_to_numnode(make_strnode(tptr, whead, tcnt,
wtyp, strnzcpy)),
NIL);
} else
tnode = cons(intern(make_strnode(tptr, whead, tcnt,
wtyp, strnzcpy)),
NIL);
}
if (outline == NIL) outline = tnode;
else setcdr(lastnode, tnode);
lastnode = tnode;
}
return(outline);
}
NODE *parser_iterate(char **inln, char *inlimit, struct string_block *inhead,
BOOLEAN semi, int endchar) {
char ch, *wptr = NULL;
static char terminate = '\0'; /* KLUDGE */
NODE *outline = NIL, *lastnode = NIL, *tnode = NIL;
int windex = 0, vbar = 0;
NODETYPES this_type = STRING;
BOOLEAN broken = FALSE;
do {
/* get the current character and increase pointer */
ch = **inln;
if (!vbar && windex == 0) wptr = *inln;
if (++(*inln) >= inlimit) *inln = &terminate;
/* skip through comments and line continuations */
while (!vbar && ((semi && ch == ';') ||
#ifdef WIN32
(ch == '~' && (**inln == 012 || **inln == 015)))) {
while (ch == '~' && (**inln == 012 || **inln == 015)) {
#else
(ch == '~' && **inln == '\n'))) {
while (ch == '~' && **inln == '\n') {
#endif
if (++(*inln) >= inlimit) *inln = &terminate;
ch = **inln;
if (windex == 0) wptr = *inln;
else {
if (**inln == ']' || **inln == '[' ||
**inln == '{' || **inln == '}') {
ch = ' ';
break;
} else {
broken = TRUE;
}
}
if (++(*inln) >= inlimit) *inln = &terminate;
}
if (semi && ch == ';') {
#ifdef WIN32
if (**inln != 012 && **inln != 015)
#else
if (**inln != '\n')
#endif
do {
ch = **inln;
if (windex == 0) wptr = *inln;
else broken = TRUE;
if (++(*inln) >= inlimit) *inln = &terminate;
}
#ifdef WIN32
while (ch != '\0' && ch != '~' && **inln != 012 && **inln != 015);
#else /* !Win32 */
while (ch != '\0' && ch != '~' && **inln != '\n');
#endif
if (ch != '\0' && ch != '~') ch = '\n';
}
}
/* flag that this word will be of BACKSLASH_STRING type */
if (getparity(ch)) this_type = BACKSLASH_STRING;
if (ch == '|') {
vbar = !vbar;
this_type = VBAR_STRING;
broken = TRUE; /* so we'll copy the chars */
}
else if (vbar || (!white_space(ch) && ch != ']' &&
ch != '{' && ch != '}' && ch != '['))
windex++;
if (vbar) continue;
else if (ch == endchar) break;
else if (ch == ']') err_logo(UNEXPECTED_BRACKET, NIL);
else if (ch == '}') err_logo(UNEXPECTED_BRACE, NIL);
/* if this is a '[', parse a new list */
else if (ch == '[') {
tnode = cons(parser_iterate(inln,inlimit,inhead,semi,']'), NIL);
if (**inln == '\0') ch = '\0';
}
else if (ch == '{') {
tnode = cons(list_to_array
(parser_iterate(inln,inlimit,inhead,semi,'}')), NIL);
if (**inln == '@') {
int i = 0, sign = 1;
(*inln)++;
if (**inln == '-') {
sign = -1;
(*inln)++;
}
while ((ch = **inln) >= '0' && ch <= '9') {
i = (i*10) + ch - '0';
(*inln)++;
}
setarrorg(car(tnode),sign*i);
}
if (**inln == '\0') ch = '\0';
}
/* if this character or the next one will terminate string, make the word */
else if (white_space(ch) || **inln == ']' || **inln == '[' ||
**inln == '{' || **inln == '}') {
if (windex > 0 || this_type == VBAR_STRING) {
if (broken == FALSE)
tnode = cons(make_strnode(wptr, inhead, windex,
this_type, strnzcpy),
NIL);
else {
tnode = cons(make_strnode(wptr,
(struct string_block *)NULL, windex,
this_type, (semi ? mend_strnzcpy : mend_nosemi)),
NIL);
broken = FALSE;
}
this_type = STRING;
windex = 0;
}
}
/* put the word onto the end of the return list */
if (tnode != NIL) {
if (outline == NIL) outline = tnode;
else setcdr(lastnode, tnode);
lastnode = tnode;
tnode = NIL;
}
} while (ch);
return(outline);
}
NODE *parser(NODE *nd, BOOLEAN semi) {
NODE *rtn;
int slen;
char *lnsav;
rtn = cnv_node_to_strnode(nd);
slen = getstrlen(rtn);
lnsav = getstrptr(rtn);
rtn = parser_iterate(&lnsav,lnsav + slen,getstrhead(rtn),semi,-1);
return(rtn);
}
NODE *lparse(NODE *args) {
NODE *arg, *val = UNBOUND;
arg = string_arg(args);
if (NOT_THROWING) {
val = parser(arg, FALSE);
}
return(val);
}
