diff options
Diffstat (limited to 'src/rq.c')
| -rw-r--r-- | src/rq.c | 161 |
1 files changed, 118 insertions, 43 deletions
@@ -56,6 +56,21 @@ /** + * The a word. + */ +struct word { + /** + * The word. + */ + const char *word; + + /** + * Should reverse video be applied? + */ + int reverse_video; +}; + +/** * The name of the process. */ static const char *argv0; @@ -80,6 +95,17 @@ static size_t width = 80; */ static size_t height = 30; +/** + * The number of words. + */ +static size_t word_count = 0; + +/** + * All loaded words. Refer to `word_count` + * for the number of contained words. + */ +static struct word *words; + /** @@ -190,32 +216,25 @@ static size_t display_len(const char *s) /** - * Display a file word by word. + * Load the file and do some preparsing. * - * @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. + * @param fd The file descriptor to the file, -1 to clean up instead. + * @return 0 on success, -1 on error. */ -static int display_file(int fd, int ttyfd, long rate) +static int load_file(int fd) { -#define SET_RATE \ - (interval.it_value.tv_usec = 60000000L / rate, \ - interval.it_value.tv_sec = interval.it_value.tv_usec / 1000000L, \ - interval.it_value.tv_usec %= 1000000L) - - ssize_t n; - char *buffer = NULL; + static char *buffer = NULL; size_t ptr = 0; size_t size = 0; void *new; int saved_errno; - int timer_set = 1; char *s; char *end; - char c; - struct itimerval interval; - memset(&interval, 0, sizeof(interval)); + size_t i; + ssize_t n; + + if (fd == -1) + return free(buffer), 0; /* Load file. */ for (;;) { @@ -237,16 +256,71 @@ static int display_file(int fd, int ttyfd, long rate) if (buffer == NULL) return 0; if (ptr == size) { - new = realloc(buffer, ++size); + new = realloc(buffer, size += 2); t (new == NULL); buffer = new; } buffer[ptr++] = '\0'; + buffer[ptr++] = '\0'; + + /* Split words. */ + size = 0; + for (s = buffer; *s; s = end + 1) { + if (word_count == size) { + size = size ? (size << 1) : 512; + new = realloc(words, size * sizeof(char*)); + t (new == NULL); + words = new; + } + while (isspace(*s)) + s++; + end = strpbrk(s, " \f\n\r\t\v"); + if (end == NULL) + end = strchr(s, '\0'); + *end = '\0'; + words[word_count].word = s; + words[word_count].reverse_video = 0; + word_count++; + } + + /* Figure out which words should have reverse video. */ + for (i = 1; i < word_count; i++) + if (!strcmp(words[i].word, words[i - 1].word)) + words[i].reverse_video = words[i - 1].reverse_video ^ 1; + + return 0; +fail: + saved_errno = errno; + free(buffer), buffer = NULL; + errno = saved_errno; + return -1; +} + + +/** + * Display a file word by word. + * + * @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 ttyfd, long rate) +{ +#define SET_RATE \ + (interval.it_value.tv_usec = 60000000L / rate, \ + interval.it_value.tv_sec = interval.it_value.tv_usec / 1000000L, \ + interval.it_value.tv_usec %= 1000000L) + + ssize_t n; + int timer_set = 1; + char c; + size_t i; + struct itimerval interval; + memset(&interval, 0, sizeof(interval)); - /* Present file. */ SET_RATE; - for (s = buffer; *s; s = end) { - setitimer(ITIMER_REAL, &interval, NULL); + for (i = 0; i < word_count; i++) { + t (setitimer(ITIMER_REAL, &interval, NULL)); rewait: n = read(ttyfd, &c, sizeof(c)); if (n < 0) { @@ -267,7 +341,7 @@ static int display_file(int fd, int ttyfd, long rate) memset(&interval, 0, sizeof(interval)); else SET_RATE; - setitimer(ITIMER_REAL, &interval, NULL); + t (setitimer(ITIMER_REAL, &interval, NULL)); timer_set ^= 1; goto rewait; case 'q': /* Q */ @@ -277,12 +351,7 @@ static int display_file(int fd, int ttyfd, long rate) break; case 'A': /* up */ case 'D': /* left */ - while ((s != buffer) && strchr(" \f\n\r\t\v", *s)) s--; - while ((s != buffer) && !strchr(" \f\n\r\t\v", *s)) s--; - while ((s != buffer) && strchr(" \f\n\r\t\v", *s)) s--; - while ((s != buffer) && !strchr(" \f\n\r\t\v", *s)) s--; - if (s == buffer) - goto rewait; + i = (i < 2 ? 0 : (i - 2)); break; case 0: if (!caught_sigalrm) @@ -292,27 +361,24 @@ static int display_file(int fd, int ttyfd, long rate) default: goto rewait; } + get_terminal_size(); - 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\033[%zu;%zuH%s", - (height + 1) / 2, (width - display_len(s)) / 2 + 1, s) < 0); + t (fprintf(stdout, "\033[H\033[2J\033[%zu;%zuH%s%s%s", + (height + 1) / 2, + (width - display_len(words[i].word)) / 2 + 1, + words[i].reverse_video ? "\033[7m" : "", + words[i].word, + words[i].reverse_video ? "\033[27m" : "") < 0); t (fflush(stdout)); - *end = c; } + t (setitimer(ITIMER_REAL, &interval, NULL)); + (void) read(ttyfd, &c, sizeof(c)); + done: - free(buffer); return 0; fail: - saved_errno = errno; - free(buffer); - errno = saved_errno; return -1; } @@ -361,6 +427,12 @@ int main(int argc, char *argv[]) t (fd == -1); } + /* Load file. */ + t (load_file(fd)); + + /* We do not need the file anymore. */ + close(fd), fd = -1; + /* Get a readable file descriptor for the controlling terminal. */ ttyfd = open("/dev/tty", O_RDONLY); t (ttyfd == -1); @@ -377,7 +449,7 @@ int main(int argc, char *argv[]) /* Display file. */ signal(SIGALRM, sigalrm); signal(SIGWINCH, sigwinch); - t (display_file(fd, ttyfd, rate)); + t (display_file(ttyfd, rate)); /* Restore terminal configurations. */ tcsetattr(ttyfd, TCSAFLUSH, &saved_stty); @@ -385,12 +457,15 @@ int main(int argc, char *argv[]) fflush(stdout); tty_configured = 0; - close(fd); + free(words); + load_file(-1); close(ttyfd); return 0; fail: perror(argv0); + free(words); + load_file(-1); if (tty_configured) { tcsetattr(ttyfd, TCSAFLUSH, &saved_stty); fprintf(stdout, "\033[?25h\033[?1049l"); |