uint32_t string2uint32(StringRange input)
{
char buf[16] = {0};
size_t inputLength = input.second - input.first;
if (inputLength >= sizeof(buf))
{
fatal2(__("too long number string"));
}
memcpy(buf, input.first, inputLength);
errno = 0;
long long number = strtoll(buf, NULL, 10);
if (errno)
{
fatal2e(__("invalid number '%s'"), buf);
}
if (number < 0)
{
fatal2(__("negative number '%s'"), buf);
}
if (number >= 0x100000000LL) // uint32_t upper limit
{
fatal2(__("too big number '%s'"), buf);
}
return uint32_t(number);
}
string copyFile(const string& sourcePath, File& sourceFile, const string& targetPath,
const std::function< void (const vector< string >&) >& callback)
{
// preparing target
string openError;
File targetFile(targetPath, "a", openError);
if (!openError.empty())
{
return format2("unable to open the file '%s' for appending: %s", targetPath, openError);
}
auto totalBytes = targetFile.tell();
callback(vector< string > { "downloading",
lexical_cast< string >(totalBytes), lexical_cast< string >(0)});
{ // determing the size
struct stat st;
if (::stat(sourcePath.c_str(), &st) == -1)
{
fatal2e(__("%s() failed: '%s'"), "stat", sourcePath);
}
callback(vector< string > { "expected-size",
lexical_cast< string >(st.st_size) });
}
{ // writing
char buffer[4096];
size_t size = sizeof(buffer);
while (sourceFile.getBlock(buffer, size), size)
{
targetFile.put(buffer, size);
totalBytes += size;
callback(vector< string > { "downloading",
lexical_cast< string >(totalBytes), lexical_cast< string >(size)});
}
}
return string();
}
