+/****************************************************************************
+ * Copyright (c) 1998-2012,2013 Free Software Foundation, Inc. *
+ * *
+ * Permission is hereby granted, free of charge, to any person obtaining a *
+ * copy of this software and associated documentation files (the *
+ * "Software"), to deal in the Software without restriction, including *
+ * without limitation the rights to use, copy, modify, merge, publish, *
+ * distribute, distribute with modifications, sublicense, and/or sell *
+ * copies of the Software, and to permit persons to whom the Software is *
+ * furnished to do so, subject to the following conditions: *
+ * *
+ * The above copyright notice and this permission notice shall be included *
+ * in all copies or substantial portions of the Software. *
+ * *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+ * *
+ * Except as contained in this notice, the name(s) of the above copyright *
+ * holders shall not be used in advertising or otherwise to promote the *
+ * sale, use or other dealings in this Software without prior written *
+ * authorization. *
+ ****************************************************************************/
/*
* view.c -- a silly little viewer program
*
* to test the scrolling code in ncurses.
*
* modified by Thomas Dickey <dickey@clark.net> July 1995 to demonstrate
- * the use of 'resizeterm()'.
+ * the use of 'resizeterm()', and May 2000 to illustrate wide-character
+ * handling.
*
* Takes a filename argument. It's a simple file-viewer with various
* scroll-up and scroll-down commands.
* scroll operation worked, and the refresh() code only had to do a
* partial repaint.
*
- * $Id: view.c,v 1.27 1998/08/22 18:33:41 tom Exp $
+ * $Id: view.c,v 1.94 2013/09/28 21:58:42 tom Exp $
*/
#include <test.priv.h>
+#include <widechars.h>
-#include <string.h>
-#include <ctype.h>
-#include <signal.h>
+#include <time.h>
+
+#undef CTRL /* conflict on AIX 5.2 with <sys/ioctl.h> */
#if HAVE_TERMIOS_H
# include <termios.h>
#else
+#if !defined(__MINGW32__)
# include <sgtty.h>
#endif
+#endif
#if !defined(sun) || !HAVE_TERMIOS_H
# if HAVE_SYS_IOCTL_H
# endif
#endif
+#define my_pair 1
+
/* This is needed to compile 'struct winsize' */
#if NEED_PTEM_H
#include <sys/stream.h>
#include <sys/ptem.h>
#endif
-static RETSIGTYPE finish(int sig) GCC_NORETURN;
-static void show_all(void);
+#undef CTRL
+#define CTRL(x) ((x) & 0x1f)
-#if defined(SIGWINCH) && defined(TIOCGWINSZ) && defined(NCURSES_VERSION)
+static void finish(int sig) GCC_NORETURN;
+static void show_all(const char *tag);
+
+#if defined(SIGWINCH) && defined(TIOCGWINSZ) && HAVE_RESIZE_TERM
#define CAN_RESIZE 1
#else
#define CAN_RESIZE 0
#endif
#if CAN_RESIZE
-static RETSIGTYPE adjust(int sig);
-static int interrupted;
+static void adjust(int sig);
+static int interrupted;
+static bool waiting = FALSE;
#endif
-static int waiting;
-static int shift;
-
-static char *fname;
-static char **lines;
-static char **lptr;
+static int shift = 0;
+static bool try_color = FALSE;
-#if !HAVE_STRDUP
-#define strdup my_strdup
-static char *strdup (char *s)
-{
- char *p;
+static char *fname;
+static NCURSES_CH_T **vec_lines;
+static NCURSES_CH_T **lptr;
+static int num_lines;
- p = malloc(strlen(s)+1);
- if (p)
- strcpy(p,s);
- return(p);
-}
-#endif /* not HAVE_STRDUP */
+static void usage(void) GCC_NORETURN;
-static void usage(void)
+static void
+usage(void)
{
- static const char *msg[] = {
- "Usage: view [options] file"
+ static const char *msg[] =
+ {
+ "Usage: view [options] file"
,""
,"Options:"
+ ," -c use color if terminal supports it"
+ ," -i ignore INT, QUIT, TERM signals"
," -n NUM specify maximum number of lines (default 1000)"
#if defined(KEY_RESIZE)
- ," -r use experimental KEY_RESIZE rather than our own handler"
+ ," -r use old-style sigwinch handler rather than KEY_RESIZE"
#endif
+ ," -s start in single-step mode, waiting for input"
#ifdef TRACE
," -t trace screen updates"
," -T NUM specify trace mask"
size_t n;
for (n = 0; n < SIZEOF(msg); n++)
fprintf(stderr, "%s\n", msg[n]);
- exit (EXIT_FAILURE);
+ ExitProgram(EXIT_FAILURE);
+}
+
+static int
+ch_len(NCURSES_CH_T * src)
+{
+ int result = 0;
+#if USE_WIDEC_SUPPORT
+ int count;
+#endif
+
+#if USE_WIDEC_SUPPORT
+ for (;;) {
+ TEST_CCHAR(src, count, {
+ ++result;
+ ++src;
+ }
+ , {
+ break;
+ })
+ }
+#else
+ while (*src++)
+ result++;
+#endif
+ return result;
+}
+
+/*
+ * Allocate a string into an array of chtype's. If UTF-8 mode is
+ * active, translate the string accordingly.
+ */
+static NCURSES_CH_T *
+ch_dup(char *src)
+{
+ unsigned len = (unsigned) strlen(src);
+ NCURSES_CH_T *dst = typeMalloc(NCURSES_CH_T, len + 1);
+ size_t j, k;
+#if USE_WIDEC_SUPPORT
+ wchar_t wstr[CCHARW_MAX + 1];
+ wchar_t wch;
+ int l = 0;
+ size_t rc;
+ int width;
+#ifndef state_unused
+ mbstate_t state;
+#endif
+#endif /* USE_WIDEC_SUPPORT */
+
+#if USE_WIDEC_SUPPORT
+ reset_mbytes(state);
+#endif
+ for (j = k = 0; j < len; j++) {
+#if USE_WIDEC_SUPPORT
+ rc = (size_t) check_mbytes(wch, src + j, len - j, state);
+ if (rc == (size_t) -1 || rc == (size_t) -2)
+ break;
+ j += rc - 1;
+ if ((width = wcwidth(wch)) < 0)
+ break;
+ if ((width > 0 && l > 0) || l == CCHARW_MAX) {
+ wstr[l] = L'\0';
+ l = 0;
+ if (setcchar(dst + k, wstr, 0, 0, NULL) != OK)
+ break;
+ ++k;
+ }
+ if (width == 0 && l == 0)
+ wstr[l++] = L' ';
+ wstr[l++] = wch;
+#else
+ dst[k++] = (chtype) UChar(src[j]);
+#endif
+ }
+#if USE_WIDEC_SUPPORT
+ if (l > 0) {
+ wstr[l] = L'\0';
+ if (setcchar(dst + k, wstr, 0, 0, NULL) == OK)
+ ++k;
+ }
+ wstr[0] = L'\0';
+ setcchar(dst + k, wstr, 0, 0, NULL);
+#else
+ dst[k] = 0;
+#endif
+ return dst;
}
-int main(int argc, char *argv[])
+int
+main(int argc, char *argv[])
{
-int MAXLINES = 1000;
-FILE *fp;
-char buf[BUFSIZ];
-int i;
-char **olptr;
-int done = FALSE;
-int length = 0;
+ int MAXLINES = 1000;
+ FILE *fp;
+ char buf[BUFSIZ];
+ int i;
+ int my_delay = 0;
+ NCURSES_CH_T **olptr;
+ int value = 0;
+ bool done = FALSE;
+ bool got_number = FALSE;
+ bool single_step = FALSE;
#if CAN_RESIZE
-bool use_resize = TRUE;
+ bool nonposix_resize = FALSE;
+#endif
+ const char *my_label = "Input";
+
+ setlocale(LC_ALL, "");
+
+#ifndef NCURSES_VERSION
+ /*
+ * We know ncurses will catch SIGINT if we don't establish our own handler.
+ * Other versions of curses may/may not catch it.
+ */
+ (void) signal(SIGINT, finish); /* arrange interrupts to terminate */
#endif
- while ((i = getopt(argc, argv, "n:rtT:")) != EOF) {
+ while ((i = getopt(argc, argv, "cin:rstT:")) != -1) {
switch (i) {
+ case 'c':
+ try_color = TRUE;
+ break;
+ case 'i':
+ CATCHALL(SIG_IGN);
+ break;
case 'n':
- if ((MAXLINES = atoi(optarg)) < 1)
+ if ((MAXLINES = atoi(optarg)) < 1 ||
+ (MAXLINES + 2) <= 1)
usage();
break;
#if CAN_RESIZE
case 'r':
- use_resize = FALSE;
+ nonposix_resize = TRUE;
break;
#endif
+ case 's':
+ single_step = TRUE;
+ break;
#ifdef TRACE
case 'T':
- trace(atoi(optarg));
+ {
+ char *next = 0;
+ int tvalue = (int) strtol(optarg, &next, 0);
+ if (tvalue < 0 || (next != 0 && *next != 0))
+ usage();
+ trace((unsigned) tvalue);
+ }
break;
case 't':
trace(TRACE_CALLS);
if (optind + 1 != argc)
usage();
- if ((lines = (char **)calloc(MAXLINES+2, sizeof(*lines))) == 0)
+ if ((vec_lines = typeCalloc(NCURSES_CH_T *, (size_t) MAXLINES + 2)) == 0)
usage();
+ assert(vec_lines != 0);
+
fname = argv[optind];
if ((fp = fopen(fname, "r")) == 0) {
perror(fname);
- return EXIT_FAILURE;
+ ExitProgram(EXIT_FAILURE);
}
-
- (void) signal(SIGINT, finish); /* arrange interrupts to terminate */
#if CAN_RESIZE
- if (use_resize)
- (void) signal(SIGWINCH, adjust); /* arrange interrupts to resize */
+ if (nonposix_resize)
+ (void) signal(SIGWINCH, adjust); /* arrange interrupts to resize */
#endif
- /* slurp the file */
- for (lptr = &lines[0]; (lptr - lines) < MAXLINES; lptr++) {
+ Trace(("slurp the file"));
+ for (lptr = &vec_lines[0]; (lptr - vec_lines) < MAXLINES; lptr++) {
char temp[BUFSIZ], *s, *d;
- int col;
+ int col;
if (fgets(buf, sizeof(buf), fp) == 0)
break;
- /* convert tabs so that shift will work properly */
+#if USE_WIDEC_SUPPORT
+ if (lptr == vec_lines) {
+ if (!memcmp("", buf, 3)) {
+ Trace(("trim BOM"));
+ s = buf + 3;
+ d = buf;
+ do {
+ } while ((*d++ = *s++) != '\0');
+ }
+ }
+#endif
+
+ /* convert tabs and nonprinting chars so that shift will work properly */
for (s = buf, d = temp, col = 0; (*d = *s) != '\0'; s++) {
+ if (*d == '\r') {
+ if (s[1] == '\n')
+ continue;
+ else
+ break;
+ }
if (*d == '\n') {
*d = '\0';
break;
} else if (*d == '\t') {
col = (col | 7) + 1;
- while ((d-temp) != col)
+ while ((d - temp) != col)
*d++ = ' ';
- } else if (isprint(*d)) {
+ } else
+#if USE_WIDEC_SUPPORT
+ col++, d++;
+#else
+ if (isprint(UChar(*d))) {
col++;
d++;
} else {
- sprintf(d, "\\%03o", *s & 0xff);
+ sprintf(d, "\\%03o", UChar(*s));
d += strlen(d);
- col = (d - temp);
+ col = (int) (d - temp);
}
+#endif
}
- *lptr = strdup(temp);
+ *lptr = ch_dup(temp);
}
(void) fclose(fp);
- length = lptr - lines;
-
- (void) initscr(); /* initialize the curses library */
- keypad(stdscr, TRUE); /* enable keyboard mapping */
- (void) nonl(); /* tell curses not to do NL->CR/NL on output */
- (void) cbreak(); /* take input chars one at a time, no wait for \n */
- (void) noecho(); /* don't echo input */
- idlok(stdscr, TRUE); /* allow use of insert/delete line */
+ num_lines = (int) (lptr - vec_lines);
+
+ (void) initscr(); /* initialize the curses library */
+ keypad(stdscr, TRUE); /* enable keyboard mapping */
+ (void) nonl(); /* tell curses not to do NL->CR/NL on output */
+ (void) cbreak(); /* take input chars one at a time, no wait for \n */
+ (void) noecho(); /* don't echo input */
+ if (!single_step)
+ nodelay(stdscr, TRUE);
+ idlok(stdscr, TRUE); /* allow use of insert/delete line */
+
+ if (try_color) {
+ if (has_colors()) {
+ start_color();
+ init_pair(my_pair, COLOR_WHITE, COLOR_BLUE);
+ bkgd((chtype) COLOR_PAIR(my_pair));
+ } else {
+ try_color = FALSE;
+ }
+ }
- lptr = lines;
+ lptr = vec_lines;
while (!done) {
int n, c;
- bool got_number;
- show_all();
+ if (!got_number)
+ show_all(my_label);
- got_number = FALSE;
- n = 0;
- for (;;) {
+ for (;;) {
#if CAN_RESIZE
- if (interrupted)
+ if (interrupted) {
adjust(0);
-#endif
+ my_label = "interrupt";
+ }
waiting = TRUE;
c = getch();
waiting = FALSE;
+#else
+ c = getch();
+#endif
if ((c < 127) && isdigit(c)) {
if (!got_number) {
- mvprintw(0,0, "Count: ");
+ MvPrintw(0, 0, "Count: ");
clrtoeol();
}
- addch(c);
- n = 10 * n + (c - '0');
+ addch(UChar(c));
+ value = 10 * value + (c - '0');
got_number = TRUE;
- }
- else
+ } else
break;
}
- if (!got_number && n == 0)
+ if (got_number && value) {
+ n = value;
+ } else {
n = 1;
+ }
- switch(c) {
+ if (c != ERR)
+ my_label = keyname(c);
+ switch (c) {
case KEY_DOWN:
case 'n':
olptr = lptr;
for (i = 0; i < n; i++)
- if ((lptr - lines) < (length - LINES + 1))
+ if ((lptr - vec_lines) < (num_lines - LINES + 1))
lptr++;
else
break;
- wscrl(stdscr, lptr - olptr);
+ scrl((int) (lptr - olptr));
break;
case KEY_UP:
case 'p':
olptr = lptr;
for (i = 0; i < n; i++)
- if (lptr > lines)
+ if (lptr > vec_lines)
lptr--;
else
break;
- wscrl(stdscr, lptr - olptr);
+ scrl((int) (lptr - olptr));
break;
case 'h':
case KEY_HOME:
- lptr = lines;
+ lptr = vec_lines;
break;
case 'e':
case KEY_END:
- if (length > LINES)
- lptr = lines + length - LINES + 1;
+ if (num_lines > LINES)
+ lptr = vec_lines + num_lines - LINES + 1;
else
- lptr = lines;
+ lptr = vec_lines;
break;
case 'r':
case KEY_RIGHT:
- shift++;
+ shift += n;
break;
case 'l':
case KEY_LEFT:
- if (shift)
- shift--;
- else
+ shift -= n;
+ if (shift < 0) {
+ shift = 0;
beep();
+ }
break;
case 'q':
break;
#ifdef KEY_RESIZE
- case KEY_RESIZE: /* ignore this; ncurses will repaint */
+ case KEY_RESIZE: /* ignore this; ncurses will repaint */
break;
#endif
-#if CAN_RESIZE
+ case 's':
+ if (got_number) {
+ halfdelay(my_delay = n);
+ } else {
+ nodelay(stdscr, FALSE);
+ my_delay = -1;
+ }
+ break;
+ case ' ':
+ nodelay(stdscr, TRUE);
+ my_delay = 0;
+ break;
+ case CTRL('L'):
+ redrawwin(stdscr);
+ break;
case ERR:
+ if (!my_delay)
+ napms(50);
break;
-#endif
default:
beep();
+ break;
+ }
+ if (c >= KEY_MIN || (c > 0 && !isdigit(c))) {
+ got_number = FALSE;
+ value = 0;
}
}
finish(0); /* we're done */
}
-static RETSIGTYPE finish(int sig)
+static void
+finish(int sig)
{
endwin();
- exit(sig != 0 ? EXIT_FAILURE : EXIT_SUCCESS);
+#if NO_LEAKS
+ if (vec_lines != 0) {
+ int n;
+ for (n = 0; n < num_lines; ++n) {
+ free(vec_lines[n]);
+ }
+ free(vec_lines);
+ }
+#endif
+ ExitProgram(sig != 0 ? EXIT_FAILURE : EXIT_SUCCESS);
}
#if CAN_RESIZE
/*
- * This uses functions that are "unsafe", but it seems to work on SunOS and
- * Linux. The 'wrefresh(curscr)' is needed to force the refresh to start from
- * the top of the screen -- some xterms mangle the bitmap while resizing.
+ * This uses functions that are "unsafe", but it seems to work on SunOS.
+ * Usually: the "unsafe" refers to the functions that POSIX lists which may be
+ * called from a signal handler. Those do not include buffered I/O, which is
+ * used for instance in wrefresh(). To be really portable, you should use the
+ * KEY_RESIZE return (which relies on ncurses' sigwinch handler).
+ *
+ * The 'wrefresh(curscr)' is needed to force the refresh to start from the top
+ * of the screen -- some xterms mangle the bitmap while resizing.
*/
-static RETSIGTYPE adjust(int sig)
+static void
+adjust(int sig)
{
- if (waiting || sig == 0) {
+ if (waiting || sig == 0) {
struct winsize size;
- if (ioctl(fileno(stdout), TIOCGWINSZ, &size) == 0) {
- resizeterm(size.ws_row, size.ws_col);
- wrefresh(curscr); /* Linux needs this */
- show_all();
- }
- interrupted = FALSE;
- } else {
- interrupted = TRUE;
+ if (ioctl(fileno(stdout), TIOCGWINSZ, &size) == 0) {
+ resize_term(size.ws_row, size.ws_col);
+ wrefresh(curscr);
+ show_all(sig ? "SIGWINCH" : "interrupt");
}
- (void) signal(SIGWINCH, adjust); /* some systems need this */
+ interrupted = FALSE;
+ } else {
+ interrupted = TRUE;
+ }
+ (void) signal(SIGWINCH, adjust); /* some systems need this */
}
-#endif /* CAN_RESIZE */
+#endif /* CAN_RESIZE */
-static void show_all(void)
+static void
+show_all(const char *tag)
{
- int i;
- char temp[BUFSIZ];
- char *s;
+ int i;
+ char temp[BUFSIZ];
+ NCURSES_CH_T *s;
+ time_t this_time;
#if CAN_RESIZE
- sprintf(temp, "(%3dx%3d) col %d ", LINES, COLS, shift);
- i = strlen(temp);
- sprintf(temp+i, "view %.*s", (int)(sizeof(temp)-7-i), fname);
+ sprintf(temp, "%.20s (%3dx%3d) col %d ", tag, LINES, COLS, shift);
+ i = (int) strlen(temp);
+ if ((i + 7) < (int) sizeof(temp)) {
+ sprintf(temp + i, "view %.*s",
+ (int) (sizeof(temp) - 7 - (size_t) i),
+ fname);
+ }
#else
- sprintf(temp, "view %.*s", (int)sizeof(temp)-7, fname);
+ (void) tag;
+ sprintf(temp, "view %.*s", (int) sizeof(temp) - 7, fname);
#endif
- move(0,0);
- printw("%.*s", COLS, temp);
- clrtoeol();
+ move(0, 0);
+ printw("%.*s", COLS, temp);
+ clrtoeol();
+ this_time = time((time_t *) 0);
+ strncpy(temp, ctime(&this_time), (size_t) 30);
+ if ((i = (int) strlen(temp)) != 0) {
+ temp[--i] = 0;
+ if (move(0, COLS - i - 2) != ERR)
+ printw(" %s", temp);
+ }
- scrollok(stdscr, FALSE); /* prevent screen from moving */
- for (i = 1; i < LINES; i++) {
- move(i, 0);
- if ((s = lptr[i-1]) != 0 && (int)strlen(s) > shift)
- printw("%3ld:%.*s", (long) (lptr+i-lines), COLS-4, s + shift);
- else
- printw("%3ld:", (long) (lptr+i-lines));
- clrtoeol();
+ scrollok(stdscr, FALSE); /* prevent screen from moving */
+ for (i = 1; i < LINES; i++) {
+ move(i, 0);
+ printw("%3ld:", (long) (lptr + i - vec_lines));
+ clrtoeol();
+ if ((s = lptr[i - 1]) != 0) {
+ int len = ch_len(s);
+ if (len > shift) {
+#if USE_WIDEC_SUPPORT
+ add_wchstr(s + shift);
+#else
+ addchstr(s + shift);
+#endif
+ }
+#if defined(NCURSES_VERSION) || defined(HAVE_WCHGAT)
+ if (try_color)
+ wchgat(stdscr, -1, A_NORMAL, my_pair, NULL);
+#endif
}
- setscrreg(1, LINES-1);
- scrollok(stdscr, TRUE);
- refresh();
+ }
+ setscrreg(1, LINES - 1);
+ scrollok(stdscr, TRUE);
+ refresh();
}
-
-/* view.c ends here */
-
projects / ncurses.git / blobdiff