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wget: shrink progress meter code; strink wget and add debug logging

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function                                             old     new   delta
fgets_and_trim                                         -      73     +73
retrieve_file_data                                   367     349     -18
bb_progress_update                                   723     699     -24
wget_main                                           2220    2190     -30
ftpcmd                                               133      87     -46
gethdr                                               200     153     -47
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/5 up/down: 73/-165)           Total: -92 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2011-02-10 23:02:28 +01:00
parent 805aa9fec9
commit f836f01cc3
2 changed files with 105 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

95
libbb/progress.c
View File

@ -60,9 +60,16 @@ void FAST_FUNC bb_progress_init(bb_progress_t *p)
p->inited = 1;
}
/* File already had beg_size bytes.
* Then we started downloading.
* We downloaded "transferred" bytes so far.
* Download is expected to stop when total size (beg_size + transferred)
* will be "totalsize" bytes.
* If totalsize == 0, then it is unknown.
*/
void FAST_FUNC bb_progress_update(bb_progress_t *p,
const char *curfile,
uoff_t beg_range,
uoff_t beg_size,
uoff_t transferred,
uoff_t totalsize)
{
@ -72,32 +79,53 @@ void FAST_FUNC bb_progress_update(bb_progress_t *p,
int barlength;
int kiloscale;
/* totalsize == 0 if it is unknown */
beg_and_transferred = beg_range + transferred;
beg_and_transferred = beg_size + transferred;
elapsed = monotonic_sec();
since_last_update = elapsed - p->lastupdate_sec;
/* Do not update on every call
* (we can be called on every network read!) */
/*
* Do not update on every call
* (we can be called on every network read!)
*/
if (since_last_update == 0 && beg_and_transferred < totalsize)
return;
/* Scale sizes down if they are close to overflowing.
* If off_t is only 32 bits, this allows calculations
* like (100 * transferred / totalsize) without risking overflow.
* Introduced error is < 0.1%
*/
kiloscale = 0;
if (totalsize >= (1 << 20)) {
totalsize >>= 10;
beg_range >>= 10;
transferred >>= 10;
beg_and_transferred >>= 10;
kiloscale++;
/*
* Scale sizes down if they are close to overflowing.
* This allows calculations like (100 * transferred / totalsize)
* without risking overflow: we guarantee 10 highest bits to be 0.
* Introduced error is less than 1 / 2^12 ~= 0.025%
*/
if (ULONG_MAX > 0xffffffff || sizeof(off_t) == 4 || sizeof(off_t) != 8) {
/*
* 64-bit CPU || small off_t: in either case,
* >> is cheap, single-word operation.
* ... || strange off_t: also use this code (it is safe,
* even if suboptimal), because 32/64 optimized one
* works only for 64-bit off_t.
*/
if (totalsize >= (1 << 22)) {
totalsize >>= 10;
beg_size >>= 10;
transferred >>= 10;
beg_and_transferred >>= 10;
kiloscale = 1;
}
} else {
/* 32-bit CPU and 64-bit off_t.
* Pick a shift (40 bits) which is easier to do on 32-bit CPU.
*/
if (totalsize >= (uoff_t)(1ULL << 54)) {
totalsize = (uint32_t)(totalsize >> 32) >> 8;
beg_size = (uint32_t)(beg_size >> 32) >> 8;
transferred = (uint32_t)(transferred >> 32) >> 8;
beg_and_transferred = (uint32_t)(beg_and_transferred >> 32) >> 8;
kiloscale = 4;
}
}
if (beg_and_transferred >= totalsize)
if (beg_and_transferred > totalsize)
beg_and_transferred = totalsize;
ratio = 100 * beg_and_transferred / totalsize;
@ -124,14 +152,14 @@ void FAST_FUNC bb_progress_update(bb_progress_t *p,
}
while (beg_and_transferred >= 100000) {
kiloscale++;
beg_and_transferred >>= 10;
kiloscale++;
}
/* see http://en.wikipedia.org/wiki/Tera */
fprintf(stderr, "%6u%c ", (unsigned)beg_and_transferred, " kMGTPEZY"[kiloscale]);
#define beg_and_transferred dont_use_beg_and_transferred_below()
if (transferred > p->lastsize) {
if (transferred != p->lastsize) {
p->lastupdate_sec = elapsed;
p->lastsize = transferred;
if (since_last_update >= STALLTIME) {
@ -141,20 +169,27 @@ void FAST_FUNC bb_progress_update(bb_progress_t *p,
}
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 if (!totalsize || !transferred || (int)elapsed <= 0) {
fprintf(stderr, "--:--:-- ETA");
} else {
uoff_t to_download = totalsize - beg_range;
if (!totalsize || (int)elapsed <= 0 || transferred > to_download) {
fprintf(stderr, "--:--:-- ETA");
} else {
/* to_download / (transferred/elapsed) - elapsed: */
unsigned eta = to_download * elapsed / transferred - elapsed;
unsigned secs = eta % 3600;
unsigned hours = eta / 3600;
fprintf(stderr, "%02u:%02u:%02u ETA", hours, secs / 60, secs % 60);
}
unsigned eta, secs, hours;
totalsize -= beg_size; /* now it's "total to upload" */
/* Estimated remaining time =
* estimated_sec_to_dl_totalsize_bytes - elapsed_sec =
* totalsize / average_bytes_sec_so_far - elapsed =
* totalsize / (transferred/elapsed) - elapsed =
* totalsize * elapsed / transferred - elapsed
*/
eta = totalsize * elapsed / transferred - elapsed;
secs = eta % 3600;
hours = eta / 3600;
fprintf(stderr, "%02u:%02u:%02u ETA", hours, secs / 60, secs % 60);
}
}

74
networking/wget.c
View File

@ -10,6 +10,10 @@
*/
#include "libbb.h"
//#define log_io(...) bb_error_msg(__VA_ARGS__)
#define log_io(...) ((void)0)
struct host_info {
// May be used if we ever will want to free() all xstrdup()s...
/* char *allocated; */
@ -197,25 +201,39 @@ static FILE *open_socket(len_and_sockaddr *lsa)
return fp;
}
/* Returns '\n' if it was seen, else '\0'. Trims at first '\r' or '\n' */
static char fgets_and_trim(FILE *fp)
{
char c;
char *buf_ptr;
if (fgets(G.wget_buf, sizeof(G.wget_buf) - 1, fp) == NULL)
bb_perror_msg_and_die("error getting response");
buf_ptr = strchrnul(G.wget_buf, '\n');
c = *buf_ptr;
*buf_ptr = '\0';
buf_ptr = strchrnul(G.wget_buf, '\r');
*buf_ptr = '\0';
log_io("< %s", G.wget_buf);
return c;
}
static int ftpcmd(const char *s1, const char *s2, FILE *fp)
{
int result;
if (s1) {
if (!s2) s2 = "";
if (!s2)
s2 = "";
fprintf(fp, "%s%s\r\n", s1, s2);
fflush(fp);
log_io("> %s%s", s1, s2);
}
do {
char *buf_ptr;
if (fgets(G.wget_buf, sizeof(G.wget_buf)-2, fp) == NULL) {
bb_perror_msg_and_die("error getting response");
}
buf_ptr = strstr(G.wget_buf, "\r\n");
if (buf_ptr) {
*buf_ptr = '\0';
}
fgets_and_trim(fp);
} while (!isdigit(G.wget_buf[0]) || G.wget_buf[3] != ' ');
G.wget_buf[3] = '\0';
@ -284,7 +302,7 @@ static void parse_url(char *src_url, struct host_info *h)
sp = h->host;
}
static char *gethdr(FILE *fp /*, int *istrunc*/)
static char *gethdr(FILE *fp)
{
char *s, *hdrval;
int c;
@ -292,19 +310,16 @@ static char *gethdr(FILE *fp /*, int *istrunc*/)
/* *istrunc = 0; */
/* retrieve header line */
if (fgets(G.wget_buf, sizeof(G.wget_buf), fp) == NULL)
return NULL;
c = fgets_and_trim(fp);
/* see if we are at the end of the headers */
for (s = G.wget_buf; *s == '\r'; ++s)
continue;
if (*s == '\n')
/* end of the headers? */
if (G.wget_buf[0] == '\0')
return NULL;
/* convert the header name to lower case */
for (s = G.wget_buf; isalnum(*s) || *s == '-' || *s == '.'; ++s) {
/* tolower for "A-Z", no-op for "0-9a-z-." */
*s = (*s | 0x20);
*s |= 0x20;
}
/* verify we are at the end of the header name */
@ -315,20 +330,12 @@ static char *gethdr(FILE *fp /*, int *istrunc*/)
*s++ = '\0';
hdrval = skip_whitespace(s);
/* locate the end of header */
while (*s && *s != '\r' && *s != '\n')
++s;
/* end of header found */
if (*s) {
*s = '\0';
return hdrval;
if (c != '\n') {
/* Rats! The buffer isn't big enough to hold the entire header value */
while (c = getc(fp), c != EOF && c != '\n')
continue;
}
/* Rats! The buffer isn't big enough to hold the entire header value */
while (c = getc(fp), c != EOF && c != '\n')
continue;
/* *istrunc = 1; */
return hdrval;
}
@ -520,9 +527,9 @@ static void NOINLINE retrieve_file_data(FILE *dfp, int output_fd)
if (!G.chunked)
break;
fgets(G.wget_buf, sizeof(G.wget_buf), dfp); /* This is a newline */
fgets_and_trim(dfp); /* This is a newline */
get_clen:
fgets(G.wget_buf, sizeof(G.wget_buf), dfp);
fgets_and_trim(dfp);
G.content_len = STRTOOFF(G.wget_buf, NULL, 16);
/* FIXME: error check? */
if (G.content_len == 0)
@ -757,8 +764,7 @@ int wget_main(int argc UNUSED_PARAM, char **argv)
* Retrieve HTTP response line and check for "200" status code.
*/
read_response:
if (fgets(G.wget_buf, sizeof(G.wget_buf), sfp) == NULL)
bb_error_msg_and_die("no response from server");
fgets_and_trim(sfp);
str = G.wget_buf;
str = skip_non_whitespace(str);