| 1 | /* |
| 2 | ** Copyright 1998 - 1999 Double Precision, Inc. |
| 3 | ** See COPYING for distribution information. |
| 4 | */ |
| 5 | |
| 6 | /* |
| 7 | ** $Id: rfc822_mkdate.c,v 1.4 2002/04/09 02:49:55 mrsam Exp $ |
| 8 | */ |
| 9 | |
| 10 | #include "rfc822.h" |
| 11 | |
| 12 | #include <sys/types.h> |
| 13 | #include <time.h> |
| 14 | #include <stdio.h> |
| 15 | #include <string.h> |
| 16 | #if HAVE_UNISTD_H |
| 17 | #include <unistd.h> |
| 18 | #endif |
| 19 | |
| 20 | static const char * const months[]={ |
| 21 | "Jan", |
| 22 | "Feb", |
| 23 | "Mar", |
| 24 | "Apr", |
| 25 | "May", |
| 26 | "Jun", |
| 27 | "Jul", |
| 28 | "Aug", |
| 29 | "Sep", |
| 30 | "Oct", |
| 31 | "Nov", |
| 32 | "Dec"}; |
| 33 | |
| 34 | static const char * const wdays[]={ |
| 35 | "Sun", |
| 36 | "Mon", |
| 37 | "Tue", |
| 38 | "Wed", |
| 39 | "Thu", |
| 40 | "Fri", |
| 41 | "Sat"}; |
| 42 | |
| 43 | void rfc822_mkdate_buf(time_t t, char *buf) |
| 44 | { |
| 45 | struct tm *p; |
| 46 | int offset; |
| 47 | |
| 48 | #if USE_TIME_ALTZONE |
| 49 | |
| 50 | p=localtime(&t); |
| 51 | offset= -(int)timezone; |
| 52 | |
| 53 | if (p->tm_isdst > 0) |
| 54 | offset= -(int)altzone; |
| 55 | |
| 56 | if (offset % 60) |
| 57 | { |
| 58 | offset=0; |
| 59 | p=gmtime(&t); |
| 60 | } |
| 61 | offset /= 60; |
| 62 | #else |
| 63 | #if USE_TIME_DAYLIGHT |
| 64 | |
| 65 | p=localtime(&t); |
| 66 | offset= -(int)timezone; |
| 67 | |
| 68 | if (p->tm_isdst > 0) |
| 69 | offset += 60*60; |
| 70 | if (offset % 60) |
| 71 | { |
| 72 | offset=0; |
| 73 | p=gmtime(&t); |
| 74 | } |
| 75 | offset /= 60; |
| 76 | #else |
| 77 | #if USE_TIME_GMTOFF |
| 78 | p=localtime(&t); |
| 79 | offset= p->tm_gmtoff; |
| 80 | |
| 81 | if (offset % 60) |
| 82 | { |
| 83 | offset=0; |
| 84 | p=gmtime(&t); |
| 85 | } |
| 86 | offset /= 60; |
| 87 | #else |
| 88 | p=gmtime(&t); |
| 89 | offset=0; |
| 90 | #endif |
| 91 | #endif |
| 92 | #endif |
| 93 | |
| 94 | offset = (offset % 60) + offset / 60 * 100; |
| 95 | |
| 96 | sprintf(buf, "%s, %02d %s %04d %02d:%02d:%02d %+05d", |
| 97 | wdays[p->tm_wday], |
| 98 | p->tm_mday, |
| 99 | months[p->tm_mon], |
| 100 | p->tm_year+1900, |
| 101 | p->tm_hour, |
| 102 | p->tm_min, |
| 103 | p->tm_sec, |
| 104 | offset); |
| 105 | } |
| 106 | |
| 107 | const char *rfc822_mkdate(time_t t) |
| 108 | { |
| 109 | static char buf[50]; |
| 110 | |
| 111 | rfc822_mkdate_buf(t, buf); |
| 112 | return (buf); |
| 113 | } |