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