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1 /* |
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2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * |
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16 */ |
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17 #ifndef _STLP_STRING_IO_C |
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18 #define _STLP_STRING_IO_C |
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19 |
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20 #ifndef _STLP_STRING_IO_H |
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21 # include <stl/_string_io.h> |
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22 #endif |
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23 |
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24 #ifndef _STLP_INTERNAL_CTYPE_H |
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25 # include <stl/_ctype.h> |
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26 #endif |
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27 |
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28 _STLP_BEGIN_NAMESPACE |
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29 |
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30 template <class _CharT, class _Traits> |
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31 bool _STLP_CALL |
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32 __stlp_string_fill(basic_ostream<_CharT, _Traits>& __os, |
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33 basic_streambuf<_CharT, _Traits>* __buf, |
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34 streamsize __n) { |
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35 _CharT __f = __os.fill(); |
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36 for (streamsize __i = 0; __i < __n; ++__i) { |
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37 if (_Traits::eq_int_type(__buf->sputc(__f), _Traits::eof())) |
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38 return false; |
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39 } |
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40 return true; |
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41 } |
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42 |
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43 |
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44 template <class _CharT, class _Traits, class _Alloc> |
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45 basic_ostream<_CharT, _Traits>& _STLP_CALL |
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46 operator << (basic_ostream<_CharT, _Traits>& __os, |
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47 const basic_string<_CharT,_Traits,_Alloc>& __s) { |
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48 typedef basic_ostream<_CharT, _Traits> __ostream; |
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49 typedef typename basic_string<_CharT, _Traits, _Alloc>::size_type size_type; |
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50 |
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51 // The hypothesis of this implementation is that size_type is unsigned: |
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52 _STLP_STATIC_ASSERT(__STATIC_CAST(size_type, -1) > 0) |
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53 |
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54 typename __ostream::sentry __sentry(__os); |
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55 bool __ok = false; |
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56 |
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57 if (__sentry) { |
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58 __ok = true; |
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59 size_type __n = __s.size(); |
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60 const bool __left = (__os.flags() & __ostream::left) != 0; |
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61 const streamsize __w = __os.width(0); |
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62 basic_streambuf<_CharT, _Traits>* __buf = __os.rdbuf(); |
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63 |
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64 const bool __need_pad = (((sizeof(streamsize) > sizeof(size_t)) && (__STATIC_CAST(streamsize, __n) < __w)) || |
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65 ((sizeof(streamsize) <= sizeof(size_t)) && (__n < __STATIC_CAST(size_t, __w)))); |
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66 streamsize __pad_len = __need_pad ? __w - __n : 0; |
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67 |
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68 if (!__left) |
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69 __ok = __stlp_string_fill(__os, __buf, __pad_len); |
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70 |
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71 __ok = __ok && (__buf->sputn(__s.data(), streamsize(__n)) == streamsize(__n)); |
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72 |
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73 if (__left) |
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74 __ok = __ok && __stlp_string_fill(__os, __buf, __pad_len); |
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75 } |
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76 |
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77 if (!__ok) |
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78 __os.setstate(__ostream::failbit); |
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79 |
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80 return __os; |
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81 } |
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82 |
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83 template <class _CharT, class _Traits, class _Alloc> |
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84 basic_istream<_CharT, _Traits>& _STLP_CALL |
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85 operator >> (basic_istream<_CharT, _Traits>& __is, |
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86 basic_string<_CharT,_Traits, _Alloc>& __s) { |
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87 typedef basic_istream<_CharT, _Traits> __istream; |
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88 typedef typename basic_string<_CharT, _Traits, _Alloc>::size_type size_type; |
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89 |
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90 // The hypothesis of this implementation is that size_type is unsigned: |
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91 _STLP_STATIC_ASSERT(__STATIC_CAST(size_type, -1) > 0) |
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92 |
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93 typename __istream::sentry __sentry(__is); |
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94 |
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95 if (__sentry) { |
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96 basic_streambuf<_CharT, _Traits>* __buf = __is.rdbuf(); |
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97 typedef ctype<_CharT> _C_type; |
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98 |
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99 const locale& __loc = __is.getloc(); |
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100 const _C_type& _Ctype = use_facet<_C_type>(__loc); |
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101 __s.clear(); |
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102 streamsize __width = __is.width(0); |
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103 size_type __n; |
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104 if (__width <= 0) |
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105 __n = __s.max_size(); |
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106 /* __width can only overflow size_type if sizeof(streamsize) > sizeof(size_type) |
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107 * because here we know that __width is positive and the stattic assertion check |
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108 * that size_type is unsigned. |
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109 */ |
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110 else if (sizeof(streamsize) > sizeof(size_type) && |
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111 (__width > __STATIC_CAST(streamsize, __s.max_size()))) |
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112 __n = 0; |
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113 else { |
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114 __n = __STATIC_CAST(size_type, __width); |
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115 __s.reserve(__n); |
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116 } |
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117 |
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118 while (__n-- > 0) { |
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119 typename _Traits::int_type __c1 = __buf->sbumpc(); |
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120 if (_Traits::eq_int_type(__c1, _Traits::eof())) { |
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121 __is.setstate(__istream::eofbit); |
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122 break; |
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123 } |
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124 else { |
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125 _CharT __c = _Traits::to_char_type(__c1); |
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126 |
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127 if (_Ctype.is(_C_type::space, __c)) { |
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128 if (_Traits::eq_int_type(__buf->sputbackc(__c), _Traits::eof())) |
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129 __is.setstate(__istream::failbit); |
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130 break; |
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131 } |
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132 else |
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133 __s.push_back(__c); |
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134 } |
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135 } |
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136 |
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137 // If we have read no characters, then set failbit. |
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138 if (__s.empty()) |
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139 __is.setstate(__istream::failbit); |
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140 } |
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141 else |
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142 __is.setstate(__istream::failbit); |
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143 |
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144 return __is; |
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145 } |
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146 |
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147 template <class _CharT, class _Traits, class _Alloc> |
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148 basic_istream<_CharT, _Traits>& _STLP_CALL |
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149 getline(basic_istream<_CharT, _Traits>& __is, |
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150 basic_string<_CharT,_Traits,_Alloc>& __s, |
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151 _CharT __delim) { |
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152 typedef basic_istream<_CharT, _Traits> __istream; |
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153 typedef typename basic_string<_CharT, _Traits, _Alloc>::size_type size_type; |
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154 size_type __nread = 0; |
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155 typename basic_istream<_CharT, _Traits>::sentry __sentry(__is, true); |
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156 if (__sentry) { |
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157 basic_streambuf<_CharT, _Traits>* __buf = __is.rdbuf(); |
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158 __s.clear(); |
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159 |
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160 while (__nread < __s.max_size()) { |
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161 int __c1 = __buf->sbumpc(); |
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162 if (_Traits::eq_int_type(__c1, _Traits::eof())) { |
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163 __is.setstate(__istream::eofbit); |
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164 break; |
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165 } |
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166 else { |
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167 ++__nread; |
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168 _CharT __c = _Traits::to_char_type(__c1); |
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169 if (!_Traits::eq(__c, __delim)) |
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170 __s.push_back(__c); |
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171 else |
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172 break; // Character is extracted but not appended. |
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173 } |
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174 } |
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175 } |
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176 if (__nread == 0 || __nread >= __s.max_size()) |
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177 __is.setstate(__istream::failbit); |
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178 |
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179 return __is; |
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180 } |
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181 |
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182 _STLP_END_NAMESPACE |
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183 |
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184 #endif |
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185 |
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186 // Local Variables: |
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187 // mode:C++ |
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188 // End: |