read_text.c

/**
  Reads the content and returns it as a string.
  @param filename
  @returns string
*/
const char * read_text(const char * filename)
{
    assert(NULL != filename);

    FILE * fp;

    if (NULL == (fp = fopen(filename, "rb"))) {
        fprintf(stderr, "Can't open the input file!\n");
        exit(1);
    }

    if(0 != fseek(fp, 0, SEEK_END)) {
        fprintf(stderr, "Can't seek the input file!");
        exit(1);
    }

    size_t fsize = ftell(fp);

    if(0 != fseek(fp, 0, SEEK_SET)) {
        fprintf(stderr, "Can't seek the input file!");
        exit(1);
    }
    // or rewind(fp);

    char * str = (char *) malloc(fsize *sizeof(char));

    if (fsize > fread(str, 1, fsize, fp)) {
        fprintf(stderr, "Can't read the whole file!");
        exit(1);
    }

    fclose(fp);

    return str;
}