wget: factor out progress bar code

Signed-off-by: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

4 files changed, 169 insertions, 121 deletions

diff --git a/include/libbb.h b/include/libbb.h
index d973d14..0f8973d 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1451,6 +1451,16 @@ int print_flags_separated(const int *masks, const char *labels,
 		int flags, const char *separator) FAST_FUNC;
 int print_flags(const masks_labels_t *ml, int flags) FAST_FUNC;
 
+typedef struct bb_progress_t {
+	off_t lastsize;
+	unsigned lastupdate_sec;
+	unsigned start_sec;
+} bb_progress_t;
+
+void bb_progress_init(bb_progress_t *p) FAST_FUNC;
+void bb_progress_update(bb_progress_t *p, const char *curfile,
+			off_t beg_range, off_t transferred,
+			off_t totalsize) FAST_FUNC;
 
 extern const char *applet_name;
 /* "BusyBox vN.N.N (timestamp or extra_version)" */
diff --git a/libbb/Kbuild b/libbb/Kbuild
index c3c02b3..d9d5ad7 100644
--- a/libbb/Kbuild
+++ b/libbb/Kbuild
@@ -76,6 +76,7 @@ lib-y += printable.o
 lib-y += print_flags.o
 lib-y += process_escape_sequence.o
 lib-y += procps.o
+lib-y += progress.o
 lib-y += ptr_to_globals.o
 lib-y += read.o
 lib-y += read_key.o
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);
+		}
+	}
+}
diff --git a/networking/wget.c b/networking/wget.c
index 0f99e8d..11d39cb 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -24,12 +24,9 @@ struct globals {
 	off_t content_len;        /* Content-length of the file */
 	off_t beg_range;          /* Range at which continue begins */
 #if ENABLE_FEATURE_WGET_STATUSBAR
-	off_t lastsize;
-	off_t totalsize;
 	off_t transferred;        /* Number of bytes transferred so far */
 	const char *curfile;      /* Name of current file being transferred */
-	unsigned lastupdate_sec;
-	unsigned start_sec;
+	bb_progress_t pmt;
 #endif
 	smallint chunked;         /* chunked transfer encoding */
 	smallint got_clen;        /* got content-length: from server  */
@@ -40,108 +37,30 @@ struct BUG_G_too_big {
 };
 #define content_len     (G.content_len    )
 #define beg_range       (G.beg_range      )
-#define lastsize        (G.lastsize       )
-#define totalsize       (G.totalsize      )
 #define transferred     (G.transferred    )
 #define curfile         (G.curfile        )
-#define lastupdate_sec  (G.lastupdate_sec )
-#define start_sec       (G.start_sec      )
 #define INIT_G() do { } while (0)
 
 
 #if ENABLE_FEATURE_WGET_STATUSBAR
-enum {
-	STALLTIME = 5                   /* Seconds when xfer considered "stalled" */
-};
-
-static unsigned int get_tty2_width(void)
-{
-	unsigned width;
-	get_terminal_width_height(2, &width, NULL);
-	return width;
-}
 
 static void progress_meter(int flag)
 {
 	/* We can be called from signal handler */
 	int save_errno = errno;
-	off_t abbrevsize;
-	unsigned since_last_update, elapsed;
-	unsigned ratio;
-	int barlength, i;
 
 	if (flag == -1) { /* first call to progress_meter */
-		start_sec = monotonic_sec();
-		lastupdate_sec = start_sec;
-		lastsize = 0;
-		totalsize = content_len + beg_range; /* as content_len changes.. */
-	}
-
-	ratio = 100;
-	if (totalsize != 0 && !G.chunked) {
-		/* long long helps to have it working even if !LFS */
-		ratio = (unsigned) (100ULL * (transferred+beg_range) / totalsize);
-		if (ratio > 100) ratio = 100;
-	}
-
-	fprintf(stderr, "\r%-20.20s%4d%% ", curfile, ratio);
-
-	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]);
-
-// Nuts! Ain't it easier to update progress meter ONLY when we transferred++?
-
-	elapsed = monotonic_sec();
-	since_last_update = elapsed - lastupdate_sec;
-	if (transferred > lastsize) {
-		lastupdate_sec = elapsed;
-		lastsize = transferred;
-		if (since_last_update >= STALLTIME) {
-			/* We "cut off" these seconds from elapsed time
-			 * by adjusting start time */
-			start_sec += since_last_update;
-		}
-		since_last_update = 0; /* we are un-stalled now */
+		bb_progress_init(&G.pmt);
 	}
-	elapsed -= 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 (transferred <= 0 || (int)elapsed <= 0 || transferred > to_download || G.chunked) {
-			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);
-		}
-	}
+	bb_progress_update(&G.pmt, curfile, beg_range, transferred,
+			   G.chunked ? 0 : content_len + beg_range);
 
 	if (flag == 0) {
 		/* last call to progress_meter */
 		alarm(0);
-		transferred = 0;
 		fputc('\n', stderr);
+		transferred = 0;
 	} else {
 		if (flag == -1) { /* first call to progress_meter */
 			signal_SA_RESTART_empty_mask(SIGALRM, progress_meter);
@@ -151,41 +70,7 @@ static void progress_meter(int flag)
 
 	errno = save_errno;
 }
-/* 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.
- *
- */
+
 #else /* FEATURE_WGET_STATUSBAR */
 
 static ALWAYS_INLINE void progress_meter(int flag UNUSED_PARAM) { }