OilfieldToolsNet/opm-common
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Merge pull request #2121 from bska/fix-fmtout-segfault

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Don't Overrun Formatting Buffer in 'doub_string_ecl'
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Joakim Hove 2020-11-19 16:25:52 +01:00 committed by GitHub
commit 20be6aa6d9
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1 changed files with 6 additions and 5 deletions
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11
src/opm/io/eclipse/EclOutput.cpp
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@ -489,8 +489,8 @@ std::string EclOutput::make_real_string_ix(float value) const
std::string EclOutput::make_doub_string_ecl(double value) const
{
char buffer [21];
std::sprintf (buffer, "%19.13E", value);
char buffer [21 + 1];
std::snprintf (buffer, sizeof buffer, "%19.13E", value);
if (value == 0.0) {
return "0.00000000000000D+00";
@ -507,22 +507,23 @@ std::string EclOutput::make_doub_string_ecl(double value) const
std::string tmpstr(buffer);
int exp = value < 0.0 ? std::stoi(tmpstr.substr(17, 4)) : std::stoi(tmpstr.substr(16, 4));
const bool use_exp_char = (exp >= -100) && (exp < 99);
if (value < 0.0) {
if (std::abs(exp) < 100) {
if (use_exp_char) {
tmpstr = "-0." + tmpstr.substr(1, 1) + tmpstr.substr(3, 13) + "D";
} else {
tmpstr = "-0." + tmpstr.substr(1, 1) + tmpstr.substr(3, 13);
}
} else {
if (std::abs(exp) < 100) {
if (use_exp_char) {
tmpstr = "0." + tmpstr.substr(0, 1) + tmpstr.substr(2, 13) + "D";
} else {
tmpstr = "0." + tmpstr.substr(0, 1) + tmpstr.substr(2, 13);
}
}
std::sprintf(buffer, "%+03i", exp + 1);
std::snprintf(buffer, sizeof buffer, "%+03i", exp + 1);
tmpstr = tmpstr + buffer;
return tmpstr;
}