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