void CommandLine::PrependWrapper(const CommandLine::StringType& wrapper)
{
if(wrapper.empty())
{
return;
}
// wrapper可能包含参数(像"gdb --args"). 所以我们不做任何额外的处理, 仅以空格
// 进行切分.
StringVector wrapper_argv;
base::SplitString(wrapper, FILE_PATH_LITERAL(' '), &wrapper_argv);
// Prepend the wrapper and update the switches/arguments |begin_args_|.
argv_.insert(argv_.begin(), wrapper_argv.begin(), wrapper_argv.end());
begin_args_ += wrapper_argv.size();
}
void CommandLine::AppendSwitchNative(const std::string& switch_string,
const CommandLine::StringType& value) {
std::string switch_key(LowerASCIIOnWindows(switch_string));
#if defined(OS_WIN)
StringType combined_switch_string(ASCIIToWide(switch_key));
#elif defined(OS_POSIX)
StringType combined_switch_string(switch_string);
#endif
size_t prefix_length = GetSwitchPrefixLength(combined_switch_string);
switches_[switch_key.substr(prefix_length)] = value;
// Preserve existing switch prefixes in |argv_|; only append one if necessary.
if (prefix_length == 0)
combined_switch_string = kSwitchPrefixes[0] + combined_switch_string;
if (!value.empty())
combined_switch_string += kSwitchValueSeparator + value;
// Append the switch and update the switches/arguments divider |begin_args_|.
argv_.insert(argv_.begin() + begin_args_++, combined_switch_string);
}