/* Copyright (C) 2004 Garrett A. Kajmowicz
This file is part of the uClibc++ Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <ios>
#include <cctype>
#include <string>
#ifndef __STD_HEADER_ISTREAM_HELPERS
#define __STD_HEADER_ISTREAM_HELPERS 1
#pragma GCC visibility push(default)
namespace std{
/* We are making the following template class for serveral reasons. Firstly,
* we want to keep the main istream code neat and tidy. Secondly, we want it
* to be easy to do partial specialization of the istream code so that it can
* be expanded and put into the library. This will allow us to make application
* code smaller at the expense of increased library size. This is a fair
* trade-off when there are multiple applications being compiled. Also, this
* feature will be used optionally via configuration options. It will also
* allow us to keep the code bases in sync, dramatically simplifying the
* maintenance required. We specialized for char because wchar and others
* require different scanf functions
*/
template <class C, class traits> _UCXXEXPORT
basic_string<C, traits> _readToken(basic_istream<C, traits>& stream)
{
basic_string<C, traits> temp;
typename traits::int_type c;
while(true){
c = stream.rdbuf()->sgetc();
if(c != traits::eof() && isspace(c) == false){
stream.rdbuf()->sbumpc();
temp.append(1, traits::to_char_type(c));
}else{
break;
}
}
if (temp.size() == 0)
stream.setstate(ios_base::eofbit|ios_base::failbit);
return temp;
}
template <class C, class traits> _UCXXEXPORT
basic_string<C, traits> _readTokenDecimal(basic_istream<C, traits>& stream)
{
basic_string<C, traits> temp;
typename traits::int_type c;
while(true){
c = stream.rdbuf()->sgetc();
if(c != traits::eof() && isspace(c) == false && (
isdigit(c) ||
c == '.' ||
c == ',' ||
((c == '-' || c == '+') && temp.size() == 0) )
){
stream.rdbuf()->sbumpc();
temp.append(1, traits::to_char_type(c));
}else{
break;
}
}
if (temp.size() == 0)
stream.setstate(ios_base::eofbit|ios_base::failbit);
return temp;
}
#ifdef __UCLIBCXX_EXPAND_ISTREAM_CHAR__
template <> _UCXXEXPORT string _readToken<char, char_traits<char> >(istream & stream);
#endif
template <class traits, class charT, class dataType> class _UCXXEXPORT __istream_readin{
public:
static void readin(basic_istream<charT,traits>& stream, dataType & var);
};
template <class traits> class _UCXXEXPORT __istream_readin<traits, char, bool>{
public:
inline static void readin(basic_istream<char, traits >& stream, bool & var)
{
/* 22.4.2.1.2.4 */
basic_string<char, traits > temp;
temp = _readToken( stream);
if (stream.flags() & ios_base::boolalpha) {
if (temp == "true") // truename()
var = true;
else {
var = false;
if (temp != "false") // falsename()
stream.setstate(ios_base::failbit);
}
} else {
long int i = 0;
int ret;
if (stream.flags() & ios_base::dec) {
ret = sscanf(temp.c_str(), "%ld", &i );
} else {
if (stream.flags() & ios_base::oct) {
ret = sscanf(temp.c_str(), "%lo", (unsigned long int *)(&i));
} else if (stream.flags() & ios_base::hex) {
if (stream.flags() & ios_base::uppercase) {
ret = sscanf(temp.c_str(), "%lX", (unsigned long int *)(&i));
} else {
ret = sscanf(temp.c_str(), "%lx", (unsigned long int *)(&i));
}
} else {
ret = sscanf(temp.c_str(), "%li", &i);
}
}
if (ret != 1 || i >> 1)
stream.setstate(ios_base::failbit);
var = ret == 1 && bool(i);
}
}
};
template <class traits> class _UCXXEXPORT __istream_readin<traits, char, short>{
public:
inline static void readin(basic_istream<char, traits >& stream, short & var)
{
basic_string<char, traits > temp;
if(stream.flags() & ios_base::dec){
temp = _readTokenDecimal( stream);
sscanf(temp.c_str(), "%hd", &var );
}else{
temp = _readToken( stream);
if( stream.flags() & ios_base::oct){
sscanf(temp.c_str(), "%ho", (unsigned short int *)(&var) );
}else if(stream.flags() & ios_base::hex){
if(stream.flags() & ios_base::uppercase){
sscanf(temp.c_str(), "%hX", (unsigned short int *)(&var) );
}else{
sscanf(temp.c_str(), "%hx", (unsigned short int *)(&var) );
}
}else{
sscanf(temp.c_str(), "%hi", &var);
}
}
}
};
template <class traits> class _UCXXEXPORT __istream_readin<traits, char, unsigned short>{
public:
inline static void readin(basic_istream<char, traits >& stream, unsigned short & var)
{
basic_string<char, traits > temp;
if(stream.flags() & ios_base::dec){
temp = _readTokenDecimal( stream);
sscanf(temp.c_str(), "%hu", &var );
}else{
temp = _readToken( stream);
if( stream.flags() & ios_base::oct){
sscanf(temp.c_str(), "%ho", &var);
}else if(stream.flags() & ios_base::hex){
if(stream.flags() & ios_base::uppercase){
sscanf(temp.c_str(), "%hX", &var );
}else{
sscanf(temp.c_str(), "%hx", &var);
}
}else{
sscanf(temp.c_str(), "%hi", (signed short int*)(&var) );
}
}
}
};
template <class traits> class _UCXXEXPORT __istream_readin<traits, char, int>{
public:
inline static void readin(basic_istream<char, traits >& stream, int & var)
{
basic_string<char, traits > temp;
if(stream.flags() & ios_base::dec){
temp = _readTokenDecimal( stream);
sscanf(temp.c_str(), "%d", &var );
}else{
temp = _readToken( stream);
if( stream.flags() & ios_base::oct){
sscanf(temp.c_str(), "%o", (unsigned int *)(&var) );
}else if(stream.flags() & ios_base::hex){
if(stream.flags() & ios_base::uppercase){
sscanf(temp.c_str(), "%X", (unsigned int *)(&var) );
}else{
sscanf(temp.c_str(), "%x", (unsigned int *)(&var) );
}
}else{
sscanf(temp.c_str(), "%i", &var);
}
}
}
};
template <class traits> class _UCXXEXPORT __istream_readin<traits, char, unsigned int>{
public:
inline static void readin(basic_istream<char, traits >& stream, unsigned int & var)
{
basic_string<char, traits > temp;
if(stream.flags() & ios_base::dec){
temp = _readTokenDecimal( stream);
sscanf(temp.c_str(), "%u", &var );
}else{
temp = _readToken( stream);
if( stream.flags() & ios_base::oct){
sscanf(temp.c_str(), "%o", (unsigned int *)(&var) );
}else if(stream.flags() & ios_base::hex){
if(stream.flags() & ios_base::uppercase){
sscanf(temp.c_str(), "%X", (unsigned int *)(&var) );
}else{
sscanf(temp.c_str(), "%x", (unsigned int *)(&var) );
}
}else{
sscanf(temp.c_str(), "%i", (int *)(&var) );
}
}
}
};
template <class traits> class _UCXXEXPORT __istream_readin<traits, char, long int>{
public:
inline static void readin(basic_istream<char, traits >& stream, long int & var)
{
basic_string<char, traits > temp;
if(stream.flags() & ios_base::dec){
temp = _readTokenDecimal( stream);
sscanf(temp.c_str(), "%ld", &var );
}else{
temp = _readToken( stream);
if( stream.flags() & ios_base::oct){
sscanf(temp.c_str(), "%lo", (unsigned long int *)(&var) );
}else if(stream.flags() & ios_base::hex){
if(stream.flags() & ios_base::uppercase){
sscanf(temp.c_str(), "%lX", (unsigned long int *)(&var) );
}else{
sscanf(temp.c_str(), "%lx", (unsigned long int *)(&var) );
}
}else{
sscanf(temp.c_str(), "%li", (long int *)(&var) );
}
}
}
};
template <class traits> class _UCXXEXPORT __istream_readin<traits, char, unsigned long int>{
public:
inline static void readin(basic_istream<char, traits >& stream, unsigned long int & var)
{
basic_string<char, traits > temp;
if(stream.flags() & ios_base::dec){
temp = _readTokenDecimal( stream);
sscanf(temp.c_str(), "%lu", &var );
}else{
temp = _readToken( stream);
if( stream.flags() & ios_base::oct){
sscanf(temp.c_str(), "%lo", &var );
}else if(stream.flags() & ios_base::hex){
if(stream.flags() & ios_base::uppercase){
sscanf(temp.c_str(), "%lX", &var );
}else{
sscanf(temp.c_str(), "%lx", &var);
}
}else{
sscanf(temp.c_str(), "%li", (long int *)(&var) );
}
}
}
};
#ifdef __UCLIBCXX_HAS_FLOATS__
template <class traits> class _UCXXEXPORT __istream_readin<traits, char, float>{
public:
inline static void readin(basic_istream<char, traits >& stream, float & var)
{
basic_string<char, traits > temp;
temp = _readTokenDecimal( stream);
sscanf(temp.c_str(), "%g", &var);
}
};
template <class traits> class _UCXXEXPORT __istream_readin<traits, char, double>{
public:
inline static void readin(basic_istream<char, traits >& stream, double & var)
{
basic_string<char, traits > temp;
temp = _readTokenDecimal( stream);
sscanf(temp.c_str(), "%lg", &var);
}
};
template <class traits> class _UCXXEXPORT __istream_readin<traits, char, long double>{
public:
inline static void readin(basic_istream<char, traits >& stream, long double & var)
{
basic_string<char, traits > temp;
temp = _readTokenDecimal( stream);
sscanf(temp.c_str(), "%Lg", &var);
}
};
#endif // ifdef __UCLIBCXX_HAS_FLOATS__
template <class traits> class _UCXXEXPORT __istream_readin<traits, char, void*>{
public:
inline static void readin(basic_istream<char, traits >& stream, void* & var)
{
basic_string<char, traits > temp;
temp = _readToken( stream);
sscanf(temp.c_str(), "%p", &var);
}
};
template<class charT, class traits> void __skipws(basic_istream<charT,traits>& is){
const typename basic_istream<charT,traits>::int_type eof = traits::eof();
typename basic_istream<charT,traits>::int_type c;
//While the next character normally read doesn't equal eof
//and that character is a space, advance to the next read position
//Thus itterating through all whitespace until we get to the meaty stuff
while (
!traits::eq_int_type((c = is.rdbuf()->sgetc()), eof)
&& isspace(c)
) {
is.rdbuf()->sbumpc();
}
if(traits::eq_int_type(c, eof)){
is.setstate(ios_base::eofbit);
}
}
}
#pragma GCC visibility pop
#endif