Question

How to check if file content is ASCII in C

Answer 1

#include <stdio.h>

int file_content_is_ASCII(char filename[]) {
    FILE* fp;

    fp = fopen(filename, "r");
    if (!fp) return 1;

    int ch;

    while ((ch = fgetc(fp)) != EOF && ch <= 127);

    fclose(fp);

    if (ch == EOF) {
        return 1;
    }

    return 0;
}

int main(void)
{
    if (file_content_is_ASCII("d:\\data.txt")) {
        puts("file is ASCII");
    }
    else {
        puts("file is not ASCII");
    }

    return 0;
}



/*
run

file is ASCII

*/

 

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