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Fix underscore handling in decimal scans (#8576) (#8577)

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This commit is contained in:
Martin Velay
2026-10-02 10:44:17 -04:00
committed by GitHub
parent e4cc6cadca
commit 9dac976008
5 changed files with 88 additions and 3 deletions
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include/verilated.cpp
+5 -2
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@@ -1695,7 +1695,8 @@ IData _vl_vsscanf(FILE* fp, // If a fscanf
_vl_vsss_read_str(fp, floc, fromp, fstr,
std::back_insert_iterator<std::string>{t_tmp},
"0123456789+-xXzZ?_");
if (!t_tmp[0]) goto done;
t_tmp.erase(std::remove(t_tmp.begin(), t_tmp.end(), '_'), t_tmp.end());
if (t_tmp.empty()) goto done;
if (formatAttr == VL_VFORMATATTR_SIGNED) {
QData ld = 0;
std::sscanf(t_tmp.c_str(), "%30" PRIu64, &ld);
@@ -2401,8 +2402,10 @@ IData VL_VALUEPLUSARGS_INW(int rbits, const std::string& ld, WDataOutP rwp) VL_M
VL_ZERO_W(rbits, rwp);
switch (std::tolower(fmt)) {
case 'd': {
std::string digits{dp};
digits.erase(std::remove(digits.begin(), digits.end(), '_'), digits.end());
int64_t lld = 0;
std::sscanf(dp, "%30" PRId64, &lld);
std::sscanf(digits.c_str(), "%30" PRId64, &lld);
VL_SET_WQ(rwp, lld);
break;
}