c - reading first line in a file gives me a "\357\273\277" prefix in the first row -
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- c++ reading file puts 3 weird characters 3 answers
when use function readthenrow row=0 (i read first row) find 3 first chars \357 ,\273 , \277. found prefix how related utf-8 files, files have prefix , don't :( . how ignore type of such prefixes in files want read them?
int readthenrow(char buff[], int row) { int file = open("my_file.txt", o_rdonly); if (file < 0) { write(2, "closing fifo unsuccessful\n", 31); exit(-1); } // function's variables int = 0; char ch; // temp variable read int check; // helping variable checking read function // read till reach needed row while (i != row) { // read 1 char check = read(file, &ch, 1); if (check < 0) { // write error message user write(2, "error occurred in reading\n", 27); exit(-1); } if (check < 0) { // if means reached end of file return -1; // couldn't read n row (n bigger x) } printf("%c",ch); // check char \n if (ch == '\n') { i++; } } // read number received buffer = 0; { // read 1 char check = read(file, buff + i, 1); if (check < 0) { // write error message user write(2, "error occurred in reading\n", 27); exit(-1); } // if reached end of file if (check == 0) { break; } i++; } while (buff[i - 1] != '\n'); // put \0 in end of string buff[i - 1] = '\0'; return 1; // return reading successful // try close file if (close(file) < 0) { write(2, "closing fifo unsuccessful\n", 31); exit(-1); } }
you seem trying read file carrying called bom (byte ordering mark).
test such prefixes , if around used potenial info draw it, go on , read file, interpreting boms indicates.
the sequence \357 \273 \277 indicates utf-8 following. not need take byte-ordering account, byte unit such files.
more on various existing boms here: http://en.wikipedia.org/wiki/byte_order_mark#representations_of_byte_order_marks_by_encoding
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