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Disallow converting locales

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No conversion is done in current implementation so avoid unexpected behavior
This commit is contained in:
Alexander Grund
2019-11-29 13:45:33 +01:00
parent 90ce184ce8
commit 8a8f23a444
1 changed files with 11 additions and 0 deletions
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11
include/boost/nowide/filebuf.hpp
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@@ -13,6 +13,7 @@
#include <boost/nowide/stackstring.hpp>
#include <cstdio>
#include <iosfwd>
#include <stdexcept>
#include <streambuf>
#else
#include <fstream>
@@ -83,6 +84,7 @@ namespace nowide {
{
if(is_open())
return NULL;
validate_cvt(this->getloc());
bool ate = bool(mode & std::ios_base::ate);
if(ate)
mode = mode ^ std::ios_base::ate;
@@ -138,6 +140,11 @@ namespace nowide {
own_ = true;
}
}
void validate_cvt(const std::locale &loc)
{
if(!std::use_facet<std::codecvt<char, char, std::mbstate_t> >(loc).always_noconv())
throw std::runtime_error("Converting codecvts are not supported");
}
protected:
virtual std::streambuf *setbuf(char *s, std::streamsize n)
@@ -243,6 +250,10 @@ namespace nowide {
{
return seekoff(std::streamoff(off), std::ios_base::beg, m);
}
virtual void imbue(const std::locale &loc)
{
validate_cvt(loc);
}
private:
int fixg()