C++ cstring类代码示例

void
config_file_iterator::Impl::substitute_macros( cstring& where )
{
    m_post_subst_line.clear();
    cstring::size_type pos;

    while( (pos = where.find( m_macro_ref_begin )) != cstring::npos ) {
        m_post_subst_line.append( where.begin(), pos );

        where.trim_left( where.begin() + pos + m_macro_ref_begin.size() );

        pos = where.find( m_macro_ref_end );

        BOOST_RT_PARAM_VALIDATE_LOGIC( pos != cstring::npos, BOOST_RT_PARAM_LITERAL( "incomplete macro reference" ) );

        cstring value = *get_macro_value( where.substr( 0, pos ), false );
        m_post_subst_line.append( value.begin(), value.size() );

        where.trim_left( where.begin() + pos + m_macro_ref_end.size() );
    }

    if( !m_post_subst_line.empty() ) {
        m_post_subst_line.append( where.begin(), where.size() );
        where = m_post_subst_line;
    }
}

include_level::include_level( cstring file_name, cstring path_separators, include_level* parent_ )
: m_parent( parent_ )
{
    if( file_name.is_empty() )
        return;

    assign_op( m_curr_location.first, file_name, 0 );
    m_curr_location.second = 0;

    m_stream.open( m_curr_location.first.c_str() );

    if( !m_stream.is_open() && !!m_parent.get() ) {
        cstring            parent_path = m_parent->m_curr_location.first;
        cstring::iterator  it          = unit_test::find_last_of( parent_path.begin(), parent_path.end(),
                                                                  path_separators.begin(),
                                                                  path_separators.end() );

        if( it != parent_path.end() ) {
            assign_op( m_curr_location.first, cstring( parent_path.begin(), it+1 ), 0 );
            m_curr_location.first.append( file_name.begin(), file_name.end() );
            m_stream.clear();
            m_stream.open( m_curr_location.first.c_str() );
        }
    }

    BOOST_RT_PARAM_VALIDATE_LOGIC( m_stream.is_open(), BOOST_RT_PARAM_LITERAL( "couldn't open file " ) << file_name );
}

    static bool _( cstring source, boost::optional<bool>& res )
    {
        BOOST_RT_PARAM_TRACE( "In interpret_argument_value_impl<bool>" );

        static literal_cstring YES( BOOST_RT_PARAM_CSTRING_LITERAL( "YES" ) );
        static literal_cstring Y( BOOST_RT_PARAM_CSTRING_LITERAL( "Y" ) );
        static literal_cstring NO( BOOST_RT_PARAM_CSTRING_LITERAL( "NO" ) );
        static literal_cstring N( BOOST_RT_PARAM_CSTRING_LITERAL( "N" ) );
        static literal_cstring one( BOOST_RT_PARAM_CSTRING_LITERAL( "1" ) );
        static literal_cstring zero( BOOST_RT_PARAM_CSTRING_LITERAL( "0" ) );

        source.trim();

        if( case_ins_eq( source, YES ) || case_ins_eq( source, Y ) || case_ins_eq( source, one ) ) {
            res = true;
            return true;
        }
        else if( case_ins_eq( source, NO ) || case_ins_eq( source, N ) || case_ins_eq( source, zero ) ) {
            res = false;
            return true;
        }
        else {
            res = true;
            return source.is_empty();
        }
    }

inline void
putenv_impl( cstring name, cstring value )
{
    using namespace std;
    // !! this may actually fail. What should we do?
    setenv( name.begin(), value.begin(), 1 );
}

    bool    interpret( cstring param_name, cstring source ) const
    {
        static cstring const s_YES( "YES" );
        static cstring const s_Y( "Y" );
        static cstring const s_NO( "NO" );
        static cstring const s_N( "N" );
        static cstring const s_TRUE( "TRUE" );
        static cstring const s_FALSE( "FALSE" );
        static cstring const s_one( "1" );
        static cstring const s_zero( "0" );

        source.trim();

        if( source.is_empty() ||
            case_ins_eq( source, s_YES ) ||
            case_ins_eq( source, s_Y ) ||
            case_ins_eq( source, s_one ) ||
            case_ins_eq( source, s_TRUE ) )
            return true;

        if( case_ins_eq( source, s_NO ) ||
            case_ins_eq( source, s_N ) ||
            case_ins_eq( source, s_zero ) ||
            case_ins_eq( source, s_FALSE ) )
            return false;

        BOOST_TEST_I_THROW( format_error( param_name ) << source << " can't be interpreted as bool value." );
    }

bool fromstringhex(cstring s, arrayvieww<byte> val)
{
	if (val.size()*2 != s.length()) return false;
	bool ok = true;
	for (size_t i=0;i<val.size();i++)
	{
		ok &= fromstringhex(s.substr(i*2, i*2+2), val[i]);
	}
	return ok;
}

string translateRk86(cstring in) {
  string out;
  out.resize(in.size());
  const char* inp = in.c_str();
  char* o = (char*)out.c_str();
  while(*inp) {
    char c = translateRk86c(*inp++);
    if(c==0) raise("Имя файла "+in+" содержит неподдерживаемый РК86 символ.");
    *o++ = c;
  }
  return out;
}

bmlwriter::mode bmlwriter::type_core(cstring val)
{
	if (val == "") return anon;
	
	char first = val[0];
	char last = val[val.length()-1];
	
	if (val.contains("\n") || first==' ' || first=='\t' || last==' ' || last=='\t') return multiline;
	if (val.contains("\"")) return col;
	if (val.contains(" ") || val.contains("\t")) return quote;
	return eq;
}

string bmlwriter::escape(cstring val)
{
	string esc = "-";
	bool needescape = (val.startswith("-"));
	for (byte c : val.bytes())
	{
		if (isalnum(c) || c=='.') esc+=c;
		else if (c=='-') esc+="--";
		else { esc+="-"+tostringhex<2>((uint8_t)c); needescape=true; }
	}
	if (needescape) return esc;
	else return val;
}

bool fromstring(cstring s, double& out)
{
	out = 0;
	auto tmp_s = s.c_str();
	const char * tmp_cp = tmp_s;
	if (*tmp_cp != '-' && !isdigit(*tmp_cp)) return false;
	char * tmp_cpo;
	double ret = strtod(drop0x(tmp_cp), &tmp_cpo);
	if (tmp_cpo != tmp_cp + s.length()) return false;
	if (!isdigit(tmp_cpo[-1])) return false;
	if (ret==HUGE_VAL || ret==-HUGE_VAL) return false;
	out = ret;
	return true;
}

 basic_param( cstring name, bool is_optional, bool is_repeatable, Modifiers const& m )
 : p_name( name.begin(), name.end() )
 , p_description( nfp::opt_get( m, description, std::string() ) )
 , p_help( nfp::opt_get( m, runtime::help, std::string() ) )
 , p_env_var( nfp::opt_get( m, env_var, std::string() ) )
 , p_value_hint( nfp::opt_get( m, value_hint, std::string() ) )
 , p_optional( is_optional )
 , p_repeatable( is_repeatable )
 , p_has_optional_value( m.has( optional_value ) )
 , p_has_default_value( m.has( default_value ) || is_repeatable )
 , p_callback( nfp::opt_get( m, callback, callback_type() ) )
 {
     add_cla_id( help_prefix, name, ":" );
 }

static size_t linelen(const cstring& input)
{
	//pointers are generally a bad idea, but this is such a hotspot it's worth it
	const uint8_t * inputraw = input.bytes().ptr();
	size_t nlpos = 0;
	if (input.bytes_hasterm())
	{
		while (!isendl(inputraw[nlpos])) nlpos++;
	}
	else
	{
		size_t inputlen = input.length();
		while (nlpos < inputlen && !isendl(inputraw[nlpos])) nlpos++;
	}
	return nlpos;
}

//returns size of leading whitespace and comments
static size_t bml_size_white(const cstring& data)
{
	int i = 0;
	while (data[i]==' ' || data[i]=='\t') i++;
	if (data[i]=='#' || (data[i]=='/' && data[i+1]=='/')) return data.length();
	else return i;
}

static bool
is_valid_identifier( cstring const& source )
{
    if( source.is_empty() )
        return false;

    cstring::const_iterator it = source.begin();

    if( !std::isalpha( *it ) )
        return false;

    while( ++it < source.end() ) {
        if( !std::isalnum( *it ) && *it != BOOST_RT_PARAM_LITERAL( '_' ) && *it != BOOST_RT_PARAM_LITERAL( '-' ) )
            return false;
    }

    return true;
}

cstring ReferenceMap::newName(cstring base) {
    // Maybe in the future we'll maintain information with per-scope identifiers,
    // but today we are content to generate globally-unique identifiers.

    // If base has a suffix of the form _(\d+), then we discard the suffix.
    // under the assumption that it is probably a generated suffix.
    // This will not impact correctness.
    unsigned len = base.size();
    const char digits[] = "0123456789";
    const char* s = base.c_str();
    while (len > 0 && strchr(digits, s[len-1])) len--;
    if (len > 0 && base[len - 1] == '_')
        base = base.substr(0, len - 1);

    cstring name = cstring::make_unique(usedNames, base, '_');
    usedNames.insert(name);
    return name;
}