author | hgs |
Tue, 20 Jul 2010 16:35:53 +0530 | |
changeset 44 | 97b0fb8a2cc2 |
parent 18 | 47c74d1534e1 |
permissions | -rw-r--r-- |
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// Regression test for STL seekg |
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#include <cstdio> // I really like formatted output. |
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#include <cstdarg> |
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#include <fstream> |
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#include <vector> |
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#include<iostream> |
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#ifndef cstd |
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#ifdef _MSC_VER |
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#define cstd |
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#else |
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//#define cstd std |
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#define cstd |
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using namespace std; |
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#endif |
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#endif |
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#ifndef __SYMBIAN32__ |
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#ifndef USING_STLPORT |
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#define vsnprintf _vsnprintf |
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#endif |
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#endif |
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class Error : public std::exception |
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{ |
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public: |
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Error(const char *pszfmt, ...); |
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const char *what() const; |
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private: |
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char mMessage[256]; |
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}; |
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#define countof(x) (sizeof(x)/sizeof((x)[0])) |
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Error::Error(const char *pszfmt, ...) |
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{ |
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cstd::va_list ap; |
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va_start(ap, pszfmt); |
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cstd::vsnprintf(mMessage, countof(mMessage), pszfmt, ap); |
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va_end(ap); |
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} |
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const char *Error::what() const |
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{ |
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return mMessage; |
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} |
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// usage: testseek filename |
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#ifdef __SYMBIAN32__ |
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int seek_test(int, char**) |
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#else |
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int main(int argc, char **argv) |
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#endif |
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{ |
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try |
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{ |
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#ifndef __SYMBIAN32__ |
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if (argc != 2) { |
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throw Error ("Wrong number of arguments (Usage: testseek filename)"); |
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} |
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#endif |
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#ifndef __SYMBIAN32__ |
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std::ifstream ifs(argv[1]); |
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ifs.open(argv[1]); |
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#else |
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std::ifstream ifs; |
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ifs.open("c:\\testframework\\tstdcpp\\seek.txt"); |
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#endif |
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if (!ifs) { |
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#ifdef __SYMBIAN32__ |
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Error e1("Failed to open file \"%s\"", "c:\\testframework\\tstdcpp\\seek.txt"); |
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throw e1; |
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#else |
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throw Error("Failed to open file \"%s\"", argv[1]); |
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#endif |
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} |
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ifs.exceptions(std::ios::badbit); |
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// First pass: read contents of file into character vector |
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std::vector<char> charvec; |
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cstd::printf("First pass:\n"); |
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for(;;) |
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{ |
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char ch; |
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if (!ifs.get(ch)) { |
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break; |
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} |
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cstd::printf("%c", ch); |
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charvec.push_back(ch); |
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} |
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printf("First pass done\n"); |
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|
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// Second pass: get positions into pos vector, checking chars |
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std::vector<std::ios::pos_type> posvec; |
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ifs.clear(); // necessary? |
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ifs.seekg(0); |
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std::vector<char>::const_iterator char_it; |
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printf("Second pass:\n"); |
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for(char_it = charvec.begin(); char_it != charvec.end(); ++char_it) |
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105 |
{ |
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std::ios::pos_type pos = ifs.tellg(); |
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107 |
posvec.push_back(pos); |
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108 |
char ch; |
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109 |
if (!ifs.get(ch)) { |
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110 |
break; |
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111 |
} |
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112 |
cstd::printf("%c", ch); |
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113 |
if (ch != *char_it) { |
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114 |
#ifdef __SYMBIAN32__ |
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115 |
Error e1("Character mismatch: got '%c', expected '%c'",ch, *char_it); |
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116 |
throw e1; |
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117 |
#else |
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118 |
throw Error("Character mismatch: got '%c', expected '%c'", |
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119 |
ch, *char_it); |
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120 |
#endif |
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121 |
} |
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122 |
} |
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123 |
if (char_it != charvec.end()) { |
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124 |
#ifdef __SYMBIAN32__ |
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125 |
Error e1("Unexpected end of file"); |
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126 |
throw e1; |
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127 |
#else |
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128 |
throw Error("Unexpected end of file"); |
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129 |
#endif |
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130 |
} |
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131 |
|
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132 |
printf("Second pass done\n"); |
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133 |
|
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134 |
// Third pass: seek to each saved position and read next char |
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135 |
ifs.clear(); // necessary, but I don't like it |
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136 |
std::vector<std::ios::pos_type>::const_iterator pos_it; |
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137 |
|
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138 |
for(pos_it = posvec.begin(); |
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pos_it != posvec.end(); ++pos_it) |
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140 |
{ |
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141 |
printf ("%d ", (int)*pos_it); |
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142 |
} |
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143 |
printf ("\n"); |
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144 |
|
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145 |
printf("Third pass:\n"); |
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146 |
for(char_it = charvec.begin(), pos_it = posvec.begin(); |
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147 |
char_it != charvec.end(); ++char_it, ++pos_it) |
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148 |
{ |
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149 |
ifs.seekg(*pos_it); |
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150 |
char ch; |
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151 |
if (!ifs.get(ch)) { |
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152 |
#ifdef __SYMBIAN32__ |
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153 |
Error e1("End of file when expecting '%c'", *char_it); |
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154 |
throw e1; |
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155 |
#else |
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156 |
throw Error("End of file when expecting '%c'", *char_it); |
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157 |
#endif |
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158 |
} |
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159 |
cstd::printf("%c", ch); |
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160 |
if (ch != *char_it) { |
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161 |
#ifdef __SYMBIAN32__ |
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162 |
Error e1("Character mismatch: got '%c', expected '%c'",ch, *char_it); |
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163 |
throw e1; |
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164 |
#else |
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165 |
throw Error("Character mismatch: got '%c', expected '%c'",ch, *char_it); |
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|
166 |
#endif |
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|
167 |
} |
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|
168 |
} |
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169 |
printf("Third pass done\n"); |
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170 |
printf("Test passed\n"); |
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|
171 |
|
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|
172 |
|
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|
173 |
} |
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|
174 |
catch (std::exception &e) |
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|
175 |
{ |
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|
176 |
cstd::printf("\nCaught exception: %s\n", e.what()); |
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177 |
cstd::printf("Test failed!\n"); |
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178 |
return 1; |
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179 |
} |
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180 |
return 0; |
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181 |
} |