wget: factor out progress bar code
Signed-off-by: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/progress.c b/libbb/progress.c
new file mode 100644
index 0000000..f6f2692
--- /dev/null
+++ b/libbb/progress.c
@@ -0,0 +1,152 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Progress bar code.
+ */
+/* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
+ * much of which was blatantly stolen from openssh.
+ */
+/*-
+ * Copyright (c) 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
+ * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
+ *
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include "libbb.h"
+#include "unicode.h"
+
+enum {
+ /* Seconds when xfer considered "stalled" */
+ STALLTIME = 5
+};
+
+static unsigned int get_tty2_width(void)
+{
+ unsigned width;
+ get_terminal_width_height(2, &width, NULL);
+ return width;
+}
+
+void FAST_FUNC bb_progress_init(bb_progress_t *p)
+{
+ p->start_sec = monotonic_sec();
+ p->lastupdate_sec = p->start_sec;
+ p->lastsize = 0;
+}
+
+void FAST_FUNC bb_progress_update(bb_progress_t *p,
+ const char *curfile,
+ off_t beg_range,
+ off_t transferred,
+ off_t totalsize)
+{
+ off_t abbrevsize;
+ unsigned since_last_update, elapsed;
+ unsigned ratio;
+ int barlength, i;
+
+ ratio = 100;
+ if (totalsize) {
+ /* long long helps to have it working even if !LFS */
+ ratio = (unsigned) (100ULL * (transferred+beg_range) / totalsize);
+ if (ratio > 100) ratio = 100;
+ }
+
+#if ENABLE_FEATURE_ASSUME_UNICODE
+ check_unicode_in_env();
+ /* libbb candidate? */
+ {
+ wchar_t wbuf21[21];
+ char *buf = xstrdup(curfile);
+ unsigned len;
+
+ /* trim to 20 wide chars max (sets wbuf21[20] to 0)
+ * also, in case mbstowcs fails, we at least
+ * dont get garbage */
+ memset(wbuf21, 0, sizeof(wbuf21));
+ /* convert to wide chars, no more than 20 */
+ len = mbstowcs(wbuf21, curfile, 20); /* NB: may return -1 */
+ /* back to multibyte; cant overflow */
+ wcstombs(buf, wbuf21, INT_MAX);
+ len = (len > 20) ? 0 : 20 - len;
+ fprintf(stderr, "\r%s%*s%4d%% ", buf, len, "", ratio);
+ free(buf);
+ }
+#else
+ fprintf(stderr, "\r%-20.20s%4d%% ", curfile, ratio);
+#endif
+
+ barlength = get_tty2_width() - 49;
+ if (barlength > 0) {
+ /* god bless gcc for variable arrays :) */
+ i = barlength * ratio / 100;
+ {
+ char buf[i+1];
+ memset(buf, '*', i);
+ buf[i] = '\0';
+ fprintf(stderr, "|%s%*s|", buf, barlength - i, "");
+ }
+ }
+ i = 0;
+ abbrevsize = transferred + beg_range;
+ while (abbrevsize >= 100000) {
+ i++;
+ abbrevsize >>= 10;
+ }
+ /* see http://en.wikipedia.org/wiki/Tera */
+ fprintf(stderr, "%6d%c ", (int)abbrevsize, " kMGTPEZY"[i]);
+
+ elapsed = monotonic_sec();
+ since_last_update = elapsed - p->lastupdate_sec;
+ if (transferred > p->lastsize) {
+ p->lastupdate_sec = elapsed;
+ p->lastsize = transferred;
+ if (since_last_update >= STALLTIME) {
+ /* We "cut off" these seconds from elapsed time
+ * by adjusting start time */
+ p->start_sec += since_last_update;
+ }
+ since_last_update = 0; /* we are un-stalled now */
+ }
+ elapsed -= p->start_sec; /* now it's "elapsed since start" */
+
+ if (since_last_update >= STALLTIME) {
+ fprintf(stderr, " - stalled -");
+ } else {
+ off_t to_download = totalsize - beg_range;
+ if (!totalsize || transferred <= 0 || (int)elapsed <= 0 || transferred > to_download) {
+ fprintf(stderr, "--:--:-- ETA");
+ } else {
+ /* to_download / (transferred/elapsed) - elapsed: */
+ int eta = (int) ((unsigned long long)to_download*elapsed/transferred - elapsed);
+ /* (long long helps to have working ETA even if !LFS) */
+ i = eta % 3600;
+ fprintf(stderr, "%02d:%02d:%02d ETA", eta / 3600, i / 60, i % 60);
+ }
+ }
+}