void
cp_usrvars(struct variable **v1, struct variable **v2)
{
struct variable *v, *tv;
v = plot_cur ? plot_cur->pl_env : NULL;
if ((tv = cp_enqvar("plots")) != NULL) {
tv->va_next = v;
v = tv;
}
if ((tv = cp_enqvar("curplot")) != NULL) {
tv->va_next = v;
v = tv;
}
if ((tv = cp_enqvar("curplottitle")) != NULL) {
tv->va_next = v;
v = tv;
}
if ((tv = cp_enqvar("curplotname")) != NULL) {
tv->va_next = v;
v = tv;
}
if ((tv = cp_enqvar("curplotdate")) != NULL) {
tv->va_next = v;
v = tv;
}
*v1 = v;
*v2 = ft_curckt ? ft_curckt->ci_vars : NULL;
}
/* Evaluate a variable. */
wordlist *
vareval(char *string)
{
struct variable *v;
wordlist *wl;
char buf[BSIZE_SP], *s;
char *oldstring = copy(string);
char *range = NULL;
int i, up, low;
cp_wstrip(string);
if ((s = strchr(string, '[')) != NULL) {
*s = '\0';
range = s + 1;
}
switch (*string) {
case '$':
wl = wl_cons(tprintf("%d", getpid()), NULL);
tfree(oldstring);
return (wl);
case '<':
(void) fflush(cp_out);
if (!fgets(buf, BSIZE_SP, cp_in)) {
clearerr(cp_in);
(void) strcpy(buf, "EOF");
}
for (s = buf; *s && (*s != '\n'); s++)
;
*s = '\0';
wl = cp_lexer(buf);
/* This is a hack. */
if (!wl->wl_word)
wl->wl_word = copy("");
tfree(oldstring);
return (wl);
case '?':
string++;
for (v = variables; v; v = v->va_next)
if (eq(v->va_name, string))
break;
if (!v)
v = cp_enqvar(string);
wl = wl_cons(copy(v ? "1" : "0"), NULL);
tfree(oldstring);
return (wl);
case '#':
string++;
for (v = variables; v; v = v->va_next)
if (eq(v->va_name, string))
break;
if (!v)
v = cp_enqvar(string);
if (!v) {
fprintf(cp_err, "Error: %s: no such variable.\n", string);
tfree(oldstring);
return (NULL);
}
if (v->va_type == CP_LIST)
for (v = v->va_vlist, i = 0; v; v = v->va_next)
i++;
else
i = (v->va_type != CP_BOOL);
wl = wl_cons(tprintf("%d", i), NULL);
tfree(oldstring);
return (wl);
case '\0':
wl = wl_cons(copy("$"), NULL);
tfree(oldstring);
return (wl);
}
/* The notation var[stuff] has two meanings... If this is a real
* variable, then the [] denotes range, but if this is a strange
* (e.g, device parameter) variable, it could be anything...
*/
for (v = variables; v; v = v->va_next)
if (eq(v->va_name, string))
break;
if (!v && isdigit_c(*string)) {
for (v = variables; v; v = v->va_next)
if (eq(v->va_name, "argv"))
break;
range = string;
}
if (!v) {
range = NULL;
string = oldstring;
v = cp_enqvar(string);
}
if (!v && (s = getenv(string)) != NULL) {
wl = wl_cons(copy(s), NULL);
tfree(oldstring);
return (wl);
}
if (!v) {
fprintf(cp_err, "Error: %s: no such variable.\n", string);
tfree(oldstring);
return (NULL);
}
wl = cp_varwl(v);
/* Now parse and deal with 'range' ... */
if (range) {
/* rather crude fix when range itself is a $expression */
wordlist *r = NULL;
if (*range == '$') {
char *t = ++range;
if (*t == '&')
t++;
while (isalnum_c(*t))
t++;
*t = '\0';
r = vareval(range);
if (!r || r->wl_next) {
fprintf(cp_err, "Error: %s: illegal index.\n", string);
tfree(oldstring);
wl_free(r);
return NULL;
}
range = r->wl_word;
}
for (low = 0; isdigit_c(*range); range++)
low = low * 10 + *range - '0';
if ((*range == '-') && isdigit_c(range[1]))
for (up = 0, range++; isdigit_c(*range); range++)
up = up * 10 + *range - '0';
else if (*range == '-')
up = wl_length(wl);
else
up = low;
up--, low--;
wl = wl_range(wl, low, up);
wl_free(r);
}
tfree(oldstring);
return (wl);
}
