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fix floating point scanners

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roodletoof
2026-09-30 22:43:10 +02:00
parent 9ac4b4f061
commit 105295157c
1 changed files with 12 additions and 15 deletions
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scanner.c
+12 -15
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@@ -222,36 +222,33 @@ scan_result_t scan_u8(scanner_t *s) {
return scan_value(val); return scan_value(val);
} }
bool scan_f64(scanner_t *s) { scan_result_t scan_f64(scanner_t *s) {
char const *save = s->cur; char const *save = s->cur;
char *end; char *end;
errno = 0; errno = 0;
double val = strtod(s->cur, &end); double val = strtod(s->cur, &end);
if (end == s->cur) { if (end == s->cur) {
s->cur = save; s->cur = save;
return false; return scan_error(s, "not a f64");
} }
if (errno == ERANGE) { if (errno == ERANGE) {
scanner_error(s, "float does not fit in f64 value"); return scan_error(s, "float does not fit in f64 value");
return false;
} }
s->cur = end; s->cur = end;
s->value.f64 = val; return scan_value(.f64=val);
return true;
} }
bool scan_f32(scanner_t *s) { scan_result_t scan_f32(scanner_t *s) {
if (!scan_f64(s)) { scan_result_t result = scan_f64(s);
return false; if (!result.ok) {
return result;
} }
float val = (float)s->value.f64; float val = (float)result.value.f64;
double back = (double)val; double back = (double)val;
if (back != s->value.f64) { if (back != result.value.f64) {
scanner_error(s, "float does not fit in f32 value"); return scan_error(s, "float does not fit in f32 value");
return false;
} }
s->value.f32 = val; return scan_value(.f32=val);
return true;
} }
bool scan_identifier(scanner_t *s) { bool scan_identifier(scanner_t *s) {