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1 /* |
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2 * Copyright (c) 1999 |
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3 * Silicon Graphics Computer Systems, Inc. |
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4 * |
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5 * Copyright (c) 1999 |
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6 * Boris Fomitchev |
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7 * |
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8 * This material is provided "as is", with absolutely no warranty expressed |
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9 * or implied. Any use is at your own risk. |
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10 * |
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11 * Permission to use or copy this software for any purpose is hereby granted |
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12 * without fee, provided the above notices are retained on all copies. |
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13 * Permission to modify the code and to distribute modified code is granted, |
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14 * provided the above notices are retained, and a notice that the code was |
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15 * modified is included with the above copyright notice. |
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16 * |
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17 */ |
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18 |
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19 #ifndef _STLP_SSTREAM_C |
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20 #define _STLP_SSTREAM_C |
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21 |
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22 #ifndef _STLP_INTERNAL_SSTREAM |
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23 # include <stl/_sstream.h> |
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24 #endif |
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25 |
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26 #if defined ( _STLP_NESTED_TYPE_PARAM_BUG ) |
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27 // no wint_t is supported for this mode |
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28 # define __BSB_int_type__ int |
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29 # define __BSB_pos_type__ streampos |
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30 #else |
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31 # define __BSB_int_type__ _STLP_TYPENAME_ON_RETURN_TYPE basic_stringbuf<_CharT, _Traits, _Alloc>::int_type |
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32 # define __BSB_pos_type__ _STLP_TYPENAME_ON_RETURN_TYPE basic_stringbuf<_CharT, _Traits, _Alloc>::pos_type |
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33 #endif |
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34 |
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35 _STLP_BEGIN_NAMESPACE |
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36 |
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37 //---------------------------------------------------------------------- |
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38 // Non-inline stringbuf member functions. |
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39 |
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40 // Constructors. Note that the base class constructor sets all of the |
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41 // get and area pointers to null. |
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42 |
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43 template <class _CharT, class _Traits, class _Alloc> |
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44 basic_stringbuf<_CharT, _Traits, _Alloc> |
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45 ::basic_stringbuf(ios_base::openmode __mode) |
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46 : basic_streambuf<_CharT, _Traits>(), _M_mode(__mode), _M_str() |
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47 {} |
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48 |
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49 template <class _CharT, class _Traits, class _Alloc> |
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50 basic_stringbuf<_CharT, _Traits, _Alloc> |
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51 ::basic_stringbuf(const basic_string<_CharT, _Traits, _Alloc>& __s, ios_base::openmode __mode) |
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52 : basic_streambuf<_CharT, _Traits>(), _M_mode(__mode), _M_str(__s) |
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53 { |
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54 _M_set_ptrs(); |
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55 } |
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56 |
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57 template <class _CharT, class _Traits, class _Alloc> |
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58 basic_stringbuf<_CharT, _Traits, _Alloc>::~basic_stringbuf() |
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59 {} |
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60 |
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61 // Set the underlying string to a new value. |
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62 template <class _CharT, class _Traits, class _Alloc> |
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63 void |
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64 basic_stringbuf<_CharT, _Traits, _Alloc>::str(const basic_string<_CharT, _Traits, _Alloc>& __s) |
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65 { |
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66 _M_str = __s; |
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67 _M_set_ptrs(); |
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68 } |
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69 |
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70 template <class _CharT, class _Traits, class _Alloc> |
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71 void |
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72 basic_stringbuf<_CharT, _Traits, _Alloc>::_M_set_ptrs() { |
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73 _CharT* __data_ptr = __CONST_CAST(_CharT*,_M_str.data()); |
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74 _CharT* __data_end = __data_ptr + _M_str.size(); |
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75 // The initial read position is the beginning of the string. |
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76 if (_M_mode & ios_base::in) { |
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77 if (_M_mode & ios_base::ate) |
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78 this->setg(__data_ptr, __data_end, __data_end); |
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79 else |
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80 this->setg(__data_ptr, __data_ptr, __data_end); |
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81 } |
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82 |
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83 // The initial write position is the beginning of the string. |
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84 if (_M_mode & ios_base::out) { |
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85 if (_M_mode & (ios_base::app | ios_base::ate)) |
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86 this->setp(__data_end, __data_end); |
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87 else |
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88 this->setp(__data_ptr, __data_end); |
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89 } |
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90 } |
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91 |
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92 // Precondition: gptr() >= egptr(). Returns a character, if one is available. |
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93 template <class _CharT, class _Traits, class _Alloc> |
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94 __BSB_int_type__ |
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95 basic_stringbuf<_CharT, _Traits, _Alloc>::underflow() { |
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96 return this->gptr() != this->egptr() |
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97 ? _Traits::to_int_type(*this->gptr()) |
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98 : _Traits::eof(); |
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99 } |
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100 |
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101 // Precondition: gptr() >= egptr(). |
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102 template <class _CharT, class _Traits, class _Alloc> |
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103 __BSB_int_type__ |
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104 basic_stringbuf<_CharT, _Traits, _Alloc>::uflow() { |
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105 if (this->gptr() != this->egptr()) { |
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106 int_type __c = _Traits::to_int_type(*this->gptr()); |
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107 this->gbump(1); |
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108 return __c; |
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109 } |
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110 else |
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111 return _Traits::eof(); |
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112 } |
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113 |
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114 template <class _CharT, class _Traits, class _Alloc> |
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115 __BSB_int_type__ |
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116 basic_stringbuf<_CharT, _Traits, _Alloc>::pbackfail(int_type __c) { |
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117 if (this->gptr() != this->eback()) { |
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118 if (!_Traits::eq_int_type(__c, _Traits::eof())) { |
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119 if (_Traits::eq(_Traits::to_char_type(__c), this->gptr()[-1])) { |
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120 this->gbump(-1); |
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121 return __c; |
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122 } |
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123 else if (_M_mode & ios_base::out) { |
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124 this->gbump(-1); |
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125 *this->gptr() = _Traits::to_char_type(__c); |
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126 return __c; |
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127 } |
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128 else |
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129 return _Traits::eof(); |
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130 } |
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131 else { |
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132 this->gbump(-1); |
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133 return _Traits::not_eof(__c); |
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134 } |
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135 } |
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136 else |
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137 return _Traits::eof(); |
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138 } |
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139 |
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140 template <class _CharT, class _Traits, class _Alloc> |
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141 __BSB_int_type__ |
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142 basic_stringbuf<_CharT, _Traits, _Alloc>::overflow(int_type __c) { |
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143 // fbp : reverse order of "ifs" to pass Dietmar's test. |
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144 // Apparently, standard allows overflow with eof even for read-only streams. |
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145 if (!_Traits::eq_int_type(__c, _Traits::eof())) { |
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146 if (_M_mode & ios_base::out) { |
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147 if (!(_M_mode & ios_base::in)) { |
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148 // It's a write-only streambuf, so we can use special append buffer. |
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149 if (this->pptr() == this->epptr()) |
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150 this->_M_append_buffer(); |
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151 |
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152 if (this->pptr() != this->epptr()) { |
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153 *this->pptr() = _Traits::to_char_type(__c); |
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154 this->pbump(1); |
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155 return __c; |
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156 } |
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157 else |
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158 return _Traits::eof(); |
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159 } |
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160 else { |
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161 // We're not using a special append buffer, just the string itself. |
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162 if (this->pptr() == this->epptr()) { |
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163 ptrdiff_t __offset = this->gptr() - this->eback(); |
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164 _M_str.push_back(_Traits::to_char_type(__c)); |
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165 |
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166 _CharT* __data_ptr = __CONST_CAST(_CharT*,_M_str.data()); |
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167 size_t __data_size = _M_str.size(); |
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168 |
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169 this->setg(__data_ptr, __data_ptr + __offset, __data_ptr+__data_size); |
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170 this->setp(__data_ptr, __data_ptr + __data_size); |
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171 this->pbump((int)__data_size); |
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172 return __c; |
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173 } |
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174 else { |
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175 *this->pptr() = _Traits::to_char_type(__c); |
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176 this->pbump(1); |
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177 return __c; |
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178 } |
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179 } |
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180 } |
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181 else // Overflow always fails if it's read-only |
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182 return _Traits::eof(); |
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183 } |
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184 else // __c is EOF, so we don't have to do anything |
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185 return _Traits::not_eof(__c); |
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186 } |
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187 |
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188 template <class _CharT, class _Traits, class _Alloc> |
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189 streamsize |
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190 basic_stringbuf<_CharT, _Traits, _Alloc>::xsputn(const char_type* __s, |
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191 streamsize __n) { |
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192 streamsize __nwritten = 0; |
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193 |
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194 if ((_M_mode & ios_base::out) && __n > 0) { |
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195 // If the put pointer is somewhere in the middle of the string, |
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196 // then overwrite instead of append. |
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197 if (this->pbase() == _M_str.data() ) { |
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198 ptrdiff_t __avail = _M_str.data() + _M_str.size() - this->pptr(); |
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199 if (__avail > __n) { |
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200 _Traits::copy(this->pptr(), __s, __STATIC_CAST(size_t, __n)); |
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201 this->pbump((int)__n); |
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202 return __n; |
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203 } |
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204 else { |
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205 _Traits::copy(this->pptr(), __s, __avail); |
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206 __nwritten += __avail; |
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207 __n -= __avail; |
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208 __s += __avail; |
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209 this->setp(_M_Buf, _M_Buf + __STATIC_CAST(int,_S_BufSiz)); |
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210 } |
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211 } |
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212 |
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213 // At this point we know we're appending. |
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214 if (_M_mode & ios_base::in) { |
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215 ptrdiff_t __get_offset = this->gptr() - this->eback(); |
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216 _M_str.append(__s, __s + __STATIC_CAST(ptrdiff_t, __n)); |
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217 |
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218 _CharT* __data_ptr = __CONST_CAST(_CharT*, _M_str.data()); |
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219 size_t __data_size = _M_str.size(); |
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220 |
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221 this->setg(__data_ptr, __data_ptr + __get_offset, __data_ptr + __data_size); |
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222 this->setp(__data_ptr, __data_ptr + __data_size); |
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223 this->pbump((int)__data_size); |
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224 } |
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225 else { |
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226 _M_append_buffer(); |
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227 _M_str.append(__s, __s + __STATIC_CAST(ptrdiff_t, __n)); |
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228 } |
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229 |
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230 __nwritten += __n; |
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231 } |
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232 |
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233 return __nwritten; |
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234 } |
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235 |
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236 template <class _CharT, class _Traits, class _Alloc> |
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237 streamsize |
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238 basic_stringbuf<_CharT, _Traits, _Alloc>::_M_xsputnc(char_type __c, |
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239 streamsize __n) { |
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240 streamsize __nwritten = 0; |
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241 |
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242 if ((_M_mode & ios_base::out) && __n > 0) { |
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243 // If the put pointer is somewhere in the middle of the string, |
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244 // then overwrite instead of append. |
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245 if (this->pbase() == _M_str.data()) { |
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246 ptrdiff_t __avail = _M_str.data() + _M_str.size() - this->pptr(); |
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247 if (__avail > __n) { |
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248 _Traits::assign(this->pptr(), __STATIC_CAST(size_t, __n), __c); |
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249 this->pbump(__STATIC_CAST(int, __n)); |
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250 return __n; |
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251 } |
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252 else { |
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253 _Traits::assign(this->pptr(), __avail, __c); |
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254 __nwritten += __avail; |
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255 __n -= __avail; |
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256 this->setp(_M_Buf, _M_Buf + __STATIC_CAST(int,_S_BufSiz)); |
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257 } |
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258 } |
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259 |
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260 // At this point we know we're appending. |
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261 size_t __app_size = sizeof(streamsize) > sizeof(size_t) ? __STATIC_CAST(size_t, (min)(__n, __STATIC_CAST(streamsize, _M_str.max_size()))) |
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262 : __STATIC_CAST(size_t, __n); |
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263 if (this->_M_mode & ios_base::in) { |
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264 ptrdiff_t __get_offset = this->gptr() - this->eback(); |
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265 _M_str.append(__app_size, __c); |
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266 |
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267 _CharT* __data_ptr = __CONST_CAST(_CharT*,_M_str.data()); |
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268 size_t __data_size = _M_str.size(); |
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269 |
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270 this->setg(__data_ptr, __data_ptr + __get_offset, __data_ptr + __data_size); |
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271 this->setp(__data_ptr, __data_ptr + __data_size); |
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272 this->pbump((int)__data_size); |
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273 } |
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274 else { |
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275 _M_append_buffer(); |
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276 _M_str.append(__app_size, __c); |
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277 } |
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278 |
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279 __nwritten += __app_size; |
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280 } |
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281 |
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282 return __nwritten; |
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283 } |
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284 |
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285 // According to the C++ standard the effects of setbuf are implementation |
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286 // defined, except that setbuf(0, 0) has no effect. In this implementation, |
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287 // setbuf(<anything>, n), for n > 0, calls reserve(n) on the underlying |
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288 // string. |
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289 template <class _CharT, class _Traits, class _Alloc> |
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290 basic_streambuf<_CharT, _Traits>* |
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291 basic_stringbuf<_CharT, _Traits, _Alloc>::setbuf(_CharT*, streamsize __n) { |
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292 if (__n > 0) { |
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293 bool __do_get_area = false; |
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294 bool __do_put_area = false; |
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295 ptrdiff_t __offg = 0; |
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296 ptrdiff_t __offp = 0; |
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297 |
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298 if (this->pbase() == _M_str.data()) { |
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299 __do_put_area = true; |
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300 __offp = this->pptr() - this->pbase(); |
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301 } |
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302 |
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303 if (this->eback() == _M_str.data()) { |
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304 __do_get_area = true; |
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305 __offg = this->gptr() - this->eback(); |
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306 } |
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307 |
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308 if ((_M_mode & ios_base::out) && !(_M_mode & ios_base::in)) |
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309 _M_append_buffer(); |
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310 |
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311 _M_str.reserve(sizeof(streamsize) > sizeof(size_t) ? __STATIC_CAST(size_t, (min)(__n, __STATIC_CAST(streamsize, _M_str.max_size()))) |
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312 : __STATIC_CAST(size_t, __n)); |
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313 |
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314 _CharT* __data_ptr = __CONST_CAST(_CharT*, _M_str.data()); |
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315 size_t __data_size = _M_str.size(); |
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316 |
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317 if (__do_get_area) { |
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318 this->setg(__data_ptr, __data_ptr + __offg, __data_ptr + __data_size); |
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319 } |
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320 |
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321 if (__do_put_area) { |
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322 this->setp(__data_ptr, __data_ptr + __data_size); |
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323 this->pbump((int)__offp); |
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324 } |
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325 } |
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326 |
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327 return this; |
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328 } |
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329 |
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330 template <class _CharT, class _Traits, class _Alloc> |
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331 __BSB_pos_type__ |
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332 basic_stringbuf<_CharT, _Traits, _Alloc> |
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333 ::seekoff(off_type __off, |
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334 ios_base::seekdir __dir, |
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335 ios_base::openmode __mode) { |
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336 __mode &= _M_mode; |
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337 |
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338 bool __imode = (__mode & ios_base::in) != 0; |
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339 bool __omode = (__mode & ios_base::out) != 0; |
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340 |
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341 if ( !(__imode || __omode) ) |
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342 return pos_type(off_type(-1)); |
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343 |
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344 if ( (__imode && (this->gptr() == 0)) || (__omode && (this->pptr() == 0)) ) |
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345 return pos_type(off_type(-1)); |
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346 |
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347 #ifndef SYMBIAN_OE_ENHANCED_LOCALE_SUPPORT |
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348 if ((_M_mode & ios_base::out) && !(_M_mode & ios_base::in)) |
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349 _M_append_buffer(); |
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350 #endif |
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351 |
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352 streamoff __newoff; |
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353 switch(__dir) { |
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354 case ios_base::beg: |
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355 __newoff = 0; |
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356 break; |
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357 case ios_base::end: |
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358 __newoff = _M_str.size(); |
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359 break; |
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360 case ios_base::cur: |
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361 __newoff = __imode ? this->gptr() - this->eback() : this->pptr() - this->pbase(); |
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362 #ifdef SYMBIAN_OE_ENHANCED_LOCALE_SUPPORT |
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363 if ( __off == 0 ) { |
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364 return pos_type(__newoff); |
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365 } |
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366 #endif |
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367 break; |
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368 default: |
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369 return pos_type(off_type(-1)); |
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370 } |
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371 |
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372 __off += __newoff; |
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373 #ifdef SYMBIAN_OE_ENHANCED_LOCALE_SUPPORT |
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374 _CharT* __data_ptr = __CONST_CAST(_CharT*, _M_str.data()); |
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375 size_t __data_size = _M_str.size(); |
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376 #endif |
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377 |
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378 if (__imode) { |
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379 ptrdiff_t __n = this->egptr() - this->eback(); |
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380 |
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381 if (__off < 0 || __off > __n) |
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382 return pos_type(off_type(-1)); |
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383 this->setg(this->eback(), this->eback() + __STATIC_CAST(ptrdiff_t, __off), |
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384 this->eback() + __STATIC_CAST(ptrdiff_t, __n)); |
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385 } |
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386 |
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387 if (__omode) { |
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388 ptrdiff_t __n = this->epptr() - this->pbase(); |
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389 |
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390 if (__off < 0 || __off > __n) |
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391 return pos_type(off_type(-1)); |
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392 #ifdef SYMBIAN_OE_ENHANCED_LOCALE_SUPPORT |
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393 this->setp(__data_ptr, __data_ptr+__data_size); |
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394 #else |
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395 this->setp(this->pbase(), this->pbase() + __n); |
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396 #endif |
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397 this->pbump((int)__off); |
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398 } |
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399 |
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400 return pos_type(__off); |
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401 } |
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402 |
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403 template <class _CharT, class _Traits, class _Alloc> |
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404 __BSB_pos_type__ |
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405 basic_stringbuf<_CharT, _Traits, _Alloc> |
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406 ::seekpos(pos_type __pos, ios_base::openmode __mode) { |
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407 __mode &= _M_mode; |
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408 |
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409 bool __imode = (__mode & ios_base::in) != 0; |
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410 bool __omode = (__mode & ios_base::out) != 0; |
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411 |
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412 if ( !(__imode || __omode) ) |
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413 return pos_type(off_type(-1)); |
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414 |
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415 if ( (__imode && (this->gptr() == 0)) || (__omode && (this->pptr() == 0)) ) |
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416 return pos_type(off_type(-1)); |
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417 |
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418 const off_type __n = __pos - pos_type(off_type(0)); |
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419 if ((_M_mode & ios_base::out) && !(_M_mode & ios_base::in)) |
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420 _M_append_buffer(); |
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421 |
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422 if (__imode) { |
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423 if (__n < 0 || __n > this->egptr() - this->eback()) |
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424 return pos_type(off_type(-1)); |
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425 this->setg(this->eback(), this->eback() + __STATIC_CAST(ptrdiff_t, __n), this->egptr()); |
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426 } |
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427 |
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428 if (__omode) { |
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429 if (__n < 0 || size_t(__n) > _M_str.size()) |
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430 return pos_type(off_type(-1)); |
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431 |
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432 _CharT* __data_ptr = __CONST_CAST(_CharT*,_M_str.data()); |
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433 size_t __data_size = _M_str.size(); |
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434 |
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435 this->setp(__data_ptr, __data_ptr+__data_size); |
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436 this->pbump((int)__n); |
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437 } |
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438 |
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439 return __pos; |
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440 } |
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441 |
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442 // This is declared as a const member function because it is |
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443 // called by basic_stringbuf<>::str(). Precondition: this is a |
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444 // write-only stringbuf. We can't use an output buffer for read- |
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445 // write stringbufs. Postcondition: pptr is reset to the beginning |
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446 // of the buffer. |
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447 template <class _CharT, class _Traits, class _Alloc> |
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448 void basic_stringbuf<_CharT, _Traits, _Alloc>::_M_append_buffer() const { |
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449 // Do we have a buffer to append? |
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450 if (this->pbase() == this->_M_Buf && this->pptr() != this->_M_Buf) { |
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451 basic_stringbuf<_CharT, _Traits, _Alloc>* __this = __CONST_CAST(_Self*,this); |
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452 __this->_M_str.append((const _CharT*)this->pbase(), (const _CharT*)this->pptr()); |
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453 #ifndef __MWERKS__ |
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454 __this->setp(__CONST_CAST(_CharT*,_M_Buf), |
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455 __CONST_CAST(_CharT*,_M_Buf + __STATIC_CAST(int,_S_BufSiz))); |
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456 #else // CodeWarrior treat const char * and const char [8] as different types |
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457 __this->setp((_CharT*)_M_Buf, |
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458 (_CharT*)(_M_Buf + __STATIC_CAST(int,_S_BufSiz))); |
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459 #endif |
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460 } |
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461 |
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462 // Have we run off the end of the string? |
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463 else if (this->pptr() == this->epptr()) { |
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464 basic_stringbuf<_CharT, _Traits, _Alloc>* __this = __CONST_CAST(_Self*,this); |
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465 #ifndef __MWERKS__ |
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466 __this->setp(__CONST_CAST(_CharT*,_M_Buf), |
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467 __CONST_CAST(_CharT*,_M_Buf + __STATIC_CAST(int,_S_BufSiz))); |
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468 #else // CodeWarrior treat const char * and const char [8] as different types |
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469 __this->setp((_CharT*)_M_Buf, |
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470 (_CharT*)(_M_Buf + __STATIC_CAST(int,_S_BufSiz))); |
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471 #endif |
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472 } |
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473 } |
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474 |
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475 //---------------------------------------------------------------------- |
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476 // Non-inline istringstream member functions. |
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477 |
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478 template <class _CharT, class _Traits, class _Alloc> |
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479 basic_istringstream<_CharT, _Traits, _Alloc> |
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480 ::basic_istringstream(ios_base::openmode __mode) |
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481 : basic_istream<_CharT, _Traits>(0), |
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482 _M_buf(__mode | ios_base::in) { |
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483 this->init(&_M_buf); |
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484 } |
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485 |
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486 template <class _CharT, class _Traits, class _Alloc> |
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487 basic_istringstream<_CharT, _Traits, _Alloc> |
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488 ::basic_istringstream(const _String& __str,ios_base::openmode __mode) |
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489 : basic_istream<_CharT, _Traits>(0), |
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490 _M_buf(__str, __mode | ios_base::in) { |
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491 this->init(&_M_buf); |
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492 } |
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493 |
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494 template <class _CharT, class _Traits, class _Alloc> |
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495 basic_istringstream<_CharT, _Traits, _Alloc>::~basic_istringstream() |
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496 {} |
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497 |
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498 //---------------------------------------------------------------------- |
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499 // Non-inline ostringstream member functions. |
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500 |
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501 template <class _CharT, class _Traits, class _Alloc> |
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502 basic_ostringstream<_CharT, _Traits, _Alloc> |
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503 ::basic_ostringstream(ios_base::openmode __mode) |
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504 : basic_ostream<_CharT, _Traits>(0), |
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505 _M_buf(__mode | ios_base::out) { |
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506 this->init(&_M_buf); |
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507 } |
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508 |
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509 template <class _CharT, class _Traits, class _Alloc> |
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510 basic_ostringstream<_CharT, _Traits, _Alloc> |
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511 ::basic_ostringstream(const _String& __str, ios_base::openmode __mode) |
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512 : basic_ostream<_CharT, _Traits>(0), |
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513 _M_buf(__str, __mode | ios_base::out) { |
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514 this->init(&_M_buf); |
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515 } |
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516 |
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517 template <class _CharT, class _Traits, class _Alloc> |
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518 basic_ostringstream<_CharT, _Traits, _Alloc>::~basic_ostringstream() |
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519 {} |
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520 |
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521 //---------------------------------------------------------------------- |
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522 // Non-inline stringstream member functions. |
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523 |
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524 template <class _CharT, class _Traits, class _Alloc> |
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525 basic_stringstream<_CharT, _Traits, _Alloc> |
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526 ::basic_stringstream(ios_base::openmode __mode) |
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527 : basic_iostream<_CharT, _Traits>(0), _M_buf(__mode) { |
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528 this->init(&_M_buf); |
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529 } |
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530 |
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531 template <class _CharT, class _Traits, class _Alloc> |
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532 basic_stringstream<_CharT, _Traits, _Alloc> |
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533 ::basic_stringstream(const _String& __str, ios_base::openmode __mode) |
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534 : basic_iostream<_CharT, _Traits>(0), _M_buf(__str, __mode) { |
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535 this->init(&_M_buf); |
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536 } |
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537 |
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538 template <class _CharT, class _Traits, class _Alloc> |
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539 basic_stringstream<_CharT, _Traits, _Alloc>::~basic_stringstream() |
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540 {} |
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541 |
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542 _STLP_END_NAMESPACE |
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543 |
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544 # undef __BSB_int_type__ |
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545 # undef __BSB_pos_type__ |
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546 |
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547 #endif /* _STLP_SSTREAM_C */ |
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548 |
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549 // Local Variables: |
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550 // mode:C++ |
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551 // End: |