diff options
Diffstat (limited to 'src/util.cpp')
| -rw-r--r-- | src/util.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/util.cpp b/src/util.cpp index a919b4b854..36ac23b1d5 100644 --- a/src/util.cpp +++ b/src/util.cpp @@ -1427,3 +1427,17 @@ void RenameThread(const char* name) #endif } +bool ParseInt32(const std::string& str, int32_t *out) +{ + char *endp = NULL; + errno = 0; // strtol will not set errno if valid + long int n = strtol(str.c_str(), &endp, 10); + if(out) *out = (int)n; + // Note that strtol returns a *long int*, so even if strtol doesn't report a over/underflow + // we still have to check that the returned value is within the range of an *int32_t*. On 64-bit + // platforms the size of these types may be different. + return endp && *endp == 0 && !errno && + n >= std::numeric_limits<int32_t>::min() && + n <= std::numeric_limits<int32_t>::max(); +} + |