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Cider Isn't Darwin Emulation, Really
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C++
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576// CFLAGS: -O3#include <fstream>#include <iostream>#include <unistd.h>#include <cstring>#include <cstdio>#include <ext/stdio_filebuf.h>
void printFile(const char* path);void test1();void test2();void test3();
char text[8001] = "";const char* file = "/tmp/__test123";
int main(){ //__gnu_cxx::stdio_filebuf<char> out; const char* file = "/tmp/__test123";
for (int i = 0; i < 800; i++) memcpy(text+i*10, "1234567890", 11); test1(); test2(); test3();
return 0;}
void test1(){ __gnu_cxx::stdio_filebuf<char> out(fopen(file, "w+b"), std::ios_base::out|std::ios_base::binary); out.sputn(text, strlen(text)); out.close();
printFile(file);}
void test2(){ std::filebuf out2; size_t len; out2.open(file, std::ios_base::binary|std::ios_base::in|std::ios_base::out|std::ios_base::trunc); len = strlen(text); printf("Len %d\n", len); out2.sputn(text, len); out2.close();
printFile(file);}
void test3(){ std::ofstream of(file, std::ios_base::binary|std::ios_base::in|std::ios_base::out|std::ios_base::trunc); of.write(text, strlen(text)); of.close();
printFile(file);}
void printFile(const char* path){ std::ifstream in; char buf[8001];
in.open(path); in.getline(buf, sizeof(buf)); in.close();
std::cout << buf << std::endl; unlink(path);}