diff options
| -rw-r--r-- | src/rq.c | 66 |
1 files changed, 65 insertions, 1 deletions
@@ -96,6 +96,69 @@ static long get_word_rate(void) +/** + * Display a file word by word. + * + * @param fd File descriptor to the file. + * @param ttyfd File descriptor for reading from the terminal. + * @param rate The number of words per minute to display. + * @return 0 on success, -1 on error. + */ +static int display_file(int fd, int ttyfd, long rate) +{ + ssize_t n; + char *buffer = NULL; + size_t ptr = 0; + size_t size = 0; + void *new; + int saved_errno; + char *s; + char *end; + char c; + + /* Load file. */ + for (;;) { + if (ptr == size) { + size = size ? (size << 1) : (8 << 10); + new = realloc(buffer, size); + t (new == NULL); + buffer = new; + } + n = read(fd, buffer + ptr, size - ptr); + if (n < 0) { + t (errno != EINTR); + continue; + } else if (n == 0) { + break; + } + } + + /* Present file. */ + for (s = buffer; *s; s = end) { + while (isspace(*s)) + s++; + end = strpbrk(s, " \f\n\r\t\v"); + if (end == NULL) + end = strchr(s, '\0'); + c = *end, *end = '\0'; + t (fprintf(stdout, "\033[H\033[2J%s", s) < 0); + t (fflush(stdout)); + sleep(1); + *end = c; + } + + free(buffer); + return 0; + +fail: + saved_errno = errno; + free(buffer); + errno = saved_errno; + return -1; +} + + + int main(int argc, char *argv[]) { int dashed = 0; @@ -153,7 +216,8 @@ int main(int argc, char *argv[]) t (tcsetattr(ttyfd, TCSAFLUSH, &stty)); tty_configured = 1; - /* TODO Display file. */ + /* Display file. */ + t (display_file(fd, ttyfd, rate)); /* Restore terminal configurations. */ tcsetattr(ttyfd, TCSAFLUSH, &saved_stty); |