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: / usr / share / doc / re2c / examples / c / generic_api /
Filename : ifstream.c
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/* Generated by re2c */
#line 1 "c/generic_api/ifstream.re"
// re2c $INPUT -o $OUTPUT
#include <cassert>
#include <cstdio>
#include <fstream>
#include <sstream>

static void convert_newlines(std::ifstream &in, std::ostringstream &out) {
    std::streampos mar;
    for (;;) {
    
#line 14 "c/generic_api/ifstream.c"
{
	char yych;
	yych = in.peek();
	switch (yych) {
		case '\r': goto yy3;
		default: goto yy1;
	}
yy1:
	{ in.ignore(); if (in.eof()) return; }
yy2:
#line 20 "c/generic_api/ifstream.re"
	{ out.put(yych); continue; }
#line 27 "c/generic_api/ifstream.c"
yy3:
	{ in.ignore(); if (in.eof()) return; }
	yych = in.peek();
	switch (yych) {
		case '\n': goto yy4;
		default: goto yy2;
	}
yy4:
	{ in.ignore(); if (in.eof()) return; }
#line 21 "c/generic_api/ifstream.re"
	{ out.put('\n'); continue; }
#line 39 "c/generic_api/ifstream.c"
}
#line 22 "c/generic_api/ifstream.re"

    }
}

int main() {
    const char *fname = "input";
    const char s1[] = "Text\r\nwith\r\nnewlines.\r\n\r\n";
    const char s2[] = "Text\nwith\nnewlines.\n\n";

    std::ofstream f(fname, std::ios::binary);
    f.write(s1, sizeof(s1) - 1);
    f.close();

    std::ifstream in(fname, std::ios::binary);
    std::ostringstream out;
    convert_newlines(in, out);
    assert(out.str() == s2);

    remove(fname);
    return 0;
}