box-o-sand/curses-practice/basics/simple_attr.c

/* pager functionality by Joseph Spainhour" <spainhou@bellsouth.net> */
#include <ncurses.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
    int ch, prev, row, col;
    prev = EOF;
    FILE *fp;
    int y, x;

    if(argc != 2)
    {
        printf("Usage: %s <a c file name>\n", argv[0]);
        exit(1);
    }
    fp = fopen(argv[1], "r");
    if(fp == NULL)
    {
        perror("Cannot open input file");
        exit(1);
    }
    initscr();                /* Start curses mode */
    getmaxyx(stdscr, row, col);        /* find the boundaries of the screeen */
    while((ch = fgetc(fp)) != EOF)    /* read the file till we reach the end */
    {
        getyx(stdscr, y, x);        /* get the current curser position */
        if(y == (row - 1))            /* are we are at the end of the screen */
        {
            printw("<-Press Any Key->");    /* tell the user to press a key */
            getch();
            clear();                /* clear the screen */
            move(0, 0);            /* start at the beginning of the screen */
        }
        if(prev == '/' && ch == '*')        /* If it is / and * then only
                                            * switch bold on */
        {
            attron(A_BOLD);            /* cut bold on */
            getyx(stdscr, y, x);        /* get the current curser position */
            move(y, x - 1);            /* back up one space */
            printw("%c%c", '/', ch);         /* The actual printing is done here */
        } else {
            printw("%c", ch);
        }
        refresh();

        if(prev == '*' && ch == '/') {
            attroff(A_BOLD);                /* Switch it off once we got */
        }
                                      /* and then / */
        prev = ch;
    }
    endwin();                           /* End curses mode */
    fclose(fp);
    return 0;
}