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5c0128d82d
gcc-4.3 -O2 was complaining that http_got_header may use uninitialized version.major and version.minor. That indeed happened with HTTP/0.9 servers, and the PRE_HTTP_1_1(version) check then had an undefined result, so http->close could remain 0 even though it should have become 1; fortunately, it was then set to 1 anyway, because there was no Content-Length header. The undefined version was also saved in http->recv_version, but it appears nothing ever reads that. So in the end, the bug did not cause any symptoms at runtime, but the warning broke the build on gcc-4.3 if ELinks was configured with --enable-debug. |
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| .. | ||
| auth | ||
| bittorrent | ||
| file | ||
| finger | ||
| fsp | ||
| ftp | ||
| gopher | ||
| http | ||
| nntp | ||
| rewrite | ||
| smb | ||
| test | ||
| about.c | ||
| about.h | ||
| common.c | ||
| common.h | ||
| data.c | ||
| data.h | ||
| date.c | ||
| date.h | ||
| header.c | ||
| header.h | ||
| Makefile | ||
| protocol.c | ||
| protocol.h | ||
| proxy.c | ||
| proxy.h | ||
| README.timegm | ||
| uri.c | ||
| uri.h | ||
| user.c | ||
| user.h | ||
This file contains description of our my_timegm() function in date.c. It was
posted as a mail to links-list by Stephane Chazelas, and I thought it may be
interesting for someone, so I decided to include it in the ELinks distribution.
Un explanation for it as one (me to start with) may wonder why
this works.
We first change of calendar. To make things easy, let's say
that 0/0/0 0:0:0 in our new calendar is the Marsh 1st 1968, so
just after a february 29th as 1968 was a leap year.
if y/m/d h:min:s is time in our calendar
and
Y/M/D h:min:s in the new calendar
M = m - 1 - 2 (+ 12 if m < 3)
Y = y - 68 (-1 if m < 3)
D = d - 1
at Y/0/0 0:0:0, there has been Y / 4 leap years in the past, so
(int) 365 * Y + Y / 4 days have past.
at Y/M/0 0:0:0, lets find how many days have past since Y/0/0:
|Mar Feb
M| 0 1 2 3 4 5 6 7 8 9 10 11
-------------------+-----------------------------------------------
days in that month|31 30 31 30 31 31 30 31 30 31 31 28 or 29
-------------------+-----------------------------------------------
x = days at Y/M/0| 0 31 61 92 122 153 184 214 245 275 306 337
-------------------+-----------------------------------------------
first approximation|
y = 30 * M| 0 30 60 90 120 150 180 210 240 270 300 330
-------------------+-----------------------------------------------
x - y| 0 1 1 2 2 3 4 4 5 5 6 7
-------------------+-----------------------------------------------
(M + 4) * 3 / 5 - 2| 0 1 1 2 2 3 4 4 5 5 6 7
-------------------+-----------------------------------------------
x - y = (M + 4) * 3 / 5 - 2
x = 30 * M + (M + 4) * 3 / 5 - 2
x = (153 * M + 2) / 5
So at Y/M/D 0:0:0,
Y * 1461 / 4 + (153 * M + 2) / 5 + D days have past since
the 1st of March of 1968
1st of March of 1968 was 671 days before 1970 Jan 1st (year 0
for unix time())
So
t = s + 60 * (min + 60 * (h + 24 * (Y * 1461 / 4 + (153 * M + 2) / 5 + D - 671)))
t = s + 60 * (min + 60 * (h + 24 * (Y * 1461 / 4 + (153 * M + 2) / 5 + d - 672)))
This shouldn't work past 2100/02/28 23:59:59 as 2100 is not a leap year.
--
St<53>phane