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cleanup and fix for uint8_t and uint16_t parsing.

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This commit is contained in:
IRainman 2026-01-14 12:23:04 +03:00
parent 21d4ce1092
commit c3a14e6a64
1 changed files with 9 additions and 13 deletions
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22
include/fast_float/ascii_number.h
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@ -577,7 +577,7 @@ parse_int_string(UC const *p, UC const *pend, T &value,
FASTFLOAT_IF_CONSTEXPR17((std::is_same<T, std::uint8_t>::value)) {
if (options.base == 10) {
const auto len = static_cast<am_digits>(pend - p);
auto const len = static_cast<am_digits>(pend - p);
if (len == 0) {
if (has_leading_zeros) {
value = 0;
@ -592,17 +592,13 @@ parse_int_string(UC const *p, UC const *pend, T &value,
uint32_t digits;
if (cpp20_and_in_constexpr()) {
uint8_t str[sizeof(uint32_t)];
for (uint_fast8_t j = 0; j != sizeof(uint32_t) && j != len; ++j) {
str[j] = static_cast<uint8_t>(p[j]);
}
digits = bit_cast<uint32_t>(str);
if (len >= sizeof(uint32_t)) {
digits = read_chars_to_unsigned<uint32_t>(p);
} else {
uint32_t b0 = static_cast<uint8_t>(p[0]);
uint32_t b1 = (len > 1) ? static_cast<uint8_t>(p[1]) : 0xFFu;
uint32_t b2 = (len > 2) ? static_cast<uint8_t>(p[2]) : 0xFFu;
uint32_t b3 = 0xFFu;
uint32_t const b0 = static_cast<uint8_t>(p[0]);
uint32_t const b1 = (len > 1) ? static_cast<uint8_t>(p[1]) : 0x00u;
uint32_t const b2 = (len > 2) ? static_cast<uint8_t>(p[2]) : 0x00u;
uint32_t const b3 = 0x00u;
digits = b0 | (b1 << 8) | (b2 << 16) | (b3 << 24);
}
#if FASTFLOAT_IS_BIG_ENDIAN
@ -673,8 +669,8 @@ parse_int_string(UC const *p, UC const *pend, T &value,
return answer;
}
if (len >= std::numeric_limits<uint16_t>::digits10) {
auto digits = read_chars_to_unsigned<uint32_t>(p);
if (len >= sizeof(uint32_t)) {
auto const digits = read_chars_to_unsigned<uint32_t>(p);
if (is_made_of_four_digits_fast(digits)) {
auto v = parse_four_digits_unrolled(digits);
if (len >= 5 && is_integer(p[4])) {