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read +INF.0, +InF.0, +Nan.0, ...

This commit is contained in:
Yuichi Nishiwaki 2014-07-26 16:56:27 +09:00
parent 27b157fb19
commit fcd332be9f
1 changed files with 16 additions and 4 deletions
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20
src/read.c
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@ -69,6 +69,18 @@ isdelim(char c)
return c == EOF || strchr("();,|\" \t\n\r", c) != NULL; /* ignores "#", "'" */
}
static bool
strcaseeq(const char *s1, const char *s2)
{
char a, b;
while ((a = *s1++) * (b = *s2++)) {
if (tolower(a) != tolower(b))
return false;
}
return a == b;
}
static pic_value
read_comment(pic_state *pic, struct pic_port *port, char c)
{
@ -262,10 +274,10 @@ read_minus(pic_state *pic, struct pic_port *port, char c)
}
else {
sym = read_symbol(pic, port, c);
if (pic_eq_p(sym, pic_sym_value(pic_intern_cstr(pic, "-inf.0")))) {
if (strcaseeq(pic_symbol_name(pic, pic_sym(sym)), "-inf.0")) {
return pic_float_value(-INFINITY);
}
if (pic_eq_p(sym, pic_sym_value(pic_intern_cstr(pic, "-nan.0")))) {
if (strcaseeq(pic_symbol_name(pic, pic_sym(sym)), "-nan.0")) {
return pic_float_value(-NAN);
}
return sym;
@ -282,10 +294,10 @@ read_plus(pic_state *pic, struct pic_port *port, char c)
}
else {
sym = read_symbol(pic, port, c);
if (pic_eq_p(sym, pic_sym_value(pic_intern_cstr(pic, "+inf.0")))) {
if (strcaseeq(pic_symbol_name(pic, pic_sym(sym)), "+inf.0")) {
return pic_float_value(INFINITY);
}
if (pic_eq_p(sym, pic_sym_value(pic_intern_cstr(pic, "+nan.0")))) {
if (strcaseeq(pic_symbol_name(pic, pic_sym(sym)), "+nan.0")) {
return pic_float_value(NAN);
}
return read_symbol(pic, port, c);