Mercurial > hgrepos > hgweb.cgi > imapext
comparison src/osdep/nt/unixnt.h @ 0:ada5e610ab86
imap-2007e
author | yuuji@gentei.org |
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date | Mon, 14 Sep 2009 15:17:45 +0900 |
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1 /* ======================================================================== | |
2 * Copyright 1988-2006 University of Washington | |
3 * | |
4 * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 * you may not use this file except in compliance with the License. | |
6 * You may obtain a copy of the License at | |
7 * | |
8 * http://www.apache.org/licenses/LICENSE-2.0 | |
9 * | |
10 * | |
11 * ======================================================================== | |
12 */ | |
13 | |
14 /* | |
15 * Program: UNIX mail routines | |
16 * | |
17 * Author: Mark Crispin | |
18 * Networks and Distributed Computing | |
19 * Computing & Communications | |
20 * University of Washington | |
21 * Administration Building, AG-44 | |
22 * Seattle, WA 98195 | |
23 * Internet: MRC@CAC.Washington.EDU | |
24 * | |
25 * Date: 20 December 1989 | |
26 * Last Edited: 30 August 2006 | |
27 */ | |
28 | |
29 | |
30 /* DEDICATION | |
31 * | |
32 * This file is dedicated to my dog, Unix, also known as Yun-chan and | |
33 * Unix J. Terwilliker Jehosophat Aloysius Monstrosity Animal Beast. Unix | |
34 * passed away at the age of 11 1/2 on September 14, 1996, 12:18 PM PDT, after | |
35 * a two-month bout with cirrhosis of the liver. | |
36 * | |
37 * He was a dear friend, and I miss him terribly. | |
38 * | |
39 * Lift a leg, Yunie. Luv ya forever!!!! | |
40 */ | |
41 | |
42 /* Validate line | |
43 * Accepts: pointer to candidate string to validate as a From header | |
44 * return pointer to end of date/time field | |
45 * return pointer to offset from t of time (hours of ``mmm dd hh:mm'') | |
46 * return pointer to offset from t of time zone (if non-zero) | |
47 * Returns: t,ti,zn set if valid From string, else ti is NIL | |
48 */ | |
49 | |
50 #define VALID(s,x,ti,zn) { \ | |
51 ti = 0; \ | |
52 if ((*s == 'F') && (s[1] == 'r') && (s[2] == 'o') && (s[3] == 'm') && \ | |
53 (s[4] == ' ')) { \ | |
54 for (x = s + 5; *x && *x != '\012'; x++); \ | |
55 if (*x) { \ | |
56 if (x[-1] == '\015') --x; \ | |
57 if (x - s >= 41) { \ | |
58 for (zn = -1; x[zn] != ' '; zn--); \ | |
59 if ((x[zn-1] == 'm') && (x[zn-2] == 'o') && (x[zn-3] == 'r') && \ | |
60 (x[zn-4] == 'f') && (x[zn-5] == ' ') && (x[zn-6] == 'e') && \ | |
61 (x[zn-7] == 't') && (x[zn-8] == 'o') && (x[zn-9] == 'm') && \ | |
62 (x[zn-10] == 'e') && (x[zn-11] == 'r') && (x[zn-12] == ' '))\ | |
63 x += zn - 12; \ | |
64 } \ | |
65 if (x - s >= 27) { \ | |
66 if (x[-5] == ' ') { \ | |
67 if (x[-8] == ':') zn = 0,ti = -5; \ | |
68 else if (x[-9] == ' ') ti = zn = -9; \ | |
69 else if ((x[-11] == ' ') && ((x[-10]=='+') || (x[-10]=='-'))) \ | |
70 ti = zn = -11; \ | |
71 } \ | |
72 else if (x[-4] == ' ') { \ | |
73 if (x[-9] == ' ') zn = -4,ti = -9; \ | |
74 } \ | |
75 else if (x[-6] == ' ') { \ | |
76 if ((x[-11] == ' ') && ((x[-5] == '+') || (x[-5] == '-'))) \ | |
77 zn = -6,ti = -11; \ | |
78 } \ | |
79 if (ti && !((x[ti - 3] == ':') && \ | |
80 (x[ti -= ((x[ti - 6] == ':') ? 9 : 6)] == ' ') && \ | |
81 (x[ti - 3] == ' ') && (x[ti - 7] == ' ') && \ | |
82 (x[ti - 11] == ' '))) ti = 0; \ | |
83 } \ | |
84 } \ | |
85 } \ | |
86 } | |
87 | |
88 /* You are not expected to understand this macro, but read the next page if | |
89 * you are not faint of heart. | |
90 * | |
91 * Known formats to the VALID macro are: | |
92 * From user Wed Dec 2 05:53 1992 | |
93 * BSD From user Wed Dec 2 05:53:22 1992 | |
94 * SysV From user Wed Dec 2 05:53 PST 1992 | |
95 * rn From user Wed Dec 2 05:53:22 PST 1992 | |
96 * From user Wed Dec 2 05:53 -0700 1992 | |
97 * emacs From user Wed Dec 2 05:53:22 -0700 1992 | |
98 * From user Wed Dec 2 05:53 1992 PST | |
99 * From user Wed Dec 2 05:53:22 1992 PST | |
100 * From user Wed Dec 2 05:53 1992 -0700 | |
101 * Solaris From user Wed Dec 2 05:53:22 1992 -0700 | |
102 * | |
103 * Plus all of the above with `` remote from xxx'' after it. Thank you very | |
104 * much, smail and Solaris, for making my life considerably more complicated. | |
105 */ | |
106 | |
107 /* | |
108 * What? You want to understand the VALID macro anyway? Alright, since you | |
109 * insist. Actually, it isn't really all that difficult, provided that you | |
110 * take it step by step. | |
111 * | |
112 * Line 1 Initializes the return ti value to failure (0); | |
113 * Lines 2-3 Validates that the 1st-5th characters are ``From ''. | |
114 * Lines 4-6 Validates that there is an end of line and points x at it. | |
115 * Lines 7-14 First checks to see if the line is at least 41 characters long. | |
116 * If so, it scans backwards to find the rightmost space. From | |
117 * that point, it scans backwards to see if the string matches | |
118 * `` remote from''. If so, it sets x to point to the space at | |
119 * the start of the string. | |
120 * Line 15 Makes sure that there are at least 27 characters in the line. | |
121 * Lines 16-21 Checks if the date/time ends with the year (there is a space | |
122 * five characters back). If there is a colon three characters | |
123 * further back, there is no timezone field, so zn is set to 0 | |
124 * and ti is set in front of the year. Otherwise, there must | |
125 * either to be a space four characters back for a three-letter | |
126 * timezone, or a space six characters back followed by a + or - | |
127 * for a numeric timezone; in either case, zn and ti become the | |
128 * offset of the space immediately before it. | |
129 * Lines 22-24 Are the failure case for line 14. If there is a space four | |
130 * characters back, it is a three-letter timezone; there must be a | |
131 * space for the year nine characters back. zn is the zone | |
132 * offset; ti is the offset of the space. | |
133 * Lines 25-28 Are the failure case for line 20. If there is a space six | |
134 * characters back, it is a numeric timezone; there must be a | |
135 * space eleven characters back and a + or - five characters back. | |
136 * zn is the zone offset; ti is the offset of the space. | |
137 * Line 29-32 If ti is valid, make sure that the string before ti is of the | |
138 * form www mmm dd hh:mm or www mmm dd hh:mm:ss, otherwise | |
139 * invalidate ti. There must be a colon three characters back | |
140 * and a space six or nine characters back (depending upon | |
141 * whether or not the character six characters back is a colon). | |
142 * There must be a space three characters further back (in front | |
143 * of the day), one seven characters back (in front of the month), | |
144 * and one eleven characters back (in front of the day of week). | |
145 * ti is set to be the offset of the space before the time. | |
146 * | |
147 * Why a macro? It gets invoked a *lot* in a tight loop. On some of the | |
148 * newer pipelined machines it is faster being open-coded than it would be if | |
149 * subroutines are called. | |
150 * | |
151 * Why does it scan backwards from the end of the line, instead of doing the | |
152 * much easier forward scan? There is no deterministic way to parse the | |
153 * ``user'' field, because it may contain unquoted spaces! Yes, I tested it to | |
154 * see if unquoted spaces were possible. They are, and I've encountered enough | |
155 * evil mail to be totally unwilling to trust that ``it will never happen''. | |
156 */ | |
157 | |
158 /* Build parameters */ | |
159 | |
160 #define KODRETRY 15 /* kiss-of-death retry in seconds */ | |
161 #define LOCKTIMEOUT 5 /* lock timeout in minutes */ |