[3914] | 1 | /* |
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[4988] | 2 | Copyright 1991 by the Massachusetts Institute of Technology |
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| 3 | |
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| 4 | Permission to use, copy, modify, and distribute this |
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| 5 | software and its documentation for any purpose and without |
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| 6 | fee is hereby granted, provided that the above copyright |
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| 7 | notice appear in all copies and that both that copyright |
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| 8 | notice and this permission notice appear in supporting |
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| 9 | documentation, and that the name of M.I.T. not be used in |
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| 10 | advertising or publicity pertaining to distribution of the |
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| 11 | software without specific, written prior permission. |
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| 12 | M.I.T. makes no representations about the suitability of |
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| 13 | this software for any purpose. It is provided "as is" |
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| 14 | without express or implied warranty. |
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| 15 | */ |
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| 16 | |
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| 17 | /* |
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[3914] | 18 | ** cache.c: manage the files in /tmp |
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| 19 | ** |
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| 20 | ** Ensure we have the ones we need, and get rid of the ones no |
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[5059] | 21 | /* |
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| 22 | ** cache.c: manage the files in /tmp |
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| 23 | ** |
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| 24 | ** Ensure we have the ones we need, and get rid of the ones no |
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[3914] | 25 | ** longer in use. |
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| 26 | ** |
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| 27 | */ |
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| 28 | |
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| 29 | #include <stdio.h> |
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| 30 | #include <X11/Intrinsic.h> |
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| 31 | #include <X11/StringDefs.h> |
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[3941] | 32 | #include <X11/IntrinsicP.h> |
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| 33 | #include <X11/CoreP.h> |
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[4641] | 34 | #include <X11/Xaw/Command.h> |
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| 35 | #include <X11/Xaw/AsciiText.h> |
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| 36 | #include <X11/Xaw/TextP.h> |
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[7956] | 37 | #include <fcntl.h> |
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[3914] | 38 | #include "xdsc.h" |
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| 39 | |
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| 40 | #define NUM_CACHED_FILES 5 |
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[5059] | 41 | #define CACHE_DIR_NEXT 1 |
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| 42 | #define CACHE_DIR_PREV 2 |
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| 43 | #define CACHE_DIR_NREF 3 |
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| 44 | #define CACHE_DIR_PREF 4 |
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[3914] | 45 | |
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| 46 | |
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[5059] | 47 | static char rcsid[] = ""; |
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| 48 | |
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[3914] | 49 | extern char *RunCommand(); |
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[4355] | 50 | extern EntryRec toplevelbuttons[2][MAX_BUTTONS]; |
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[3941] | 51 | extern TextWidget bottextW, toptextW; |
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[3914] | 52 | extern Boolean debug; |
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| 53 | extern char filebase[]; |
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[4355] | 54 | extern int topscreen; |
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[4641] | 55 | extern int edscversion; |
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[3941] | 56 | extern Widget topW; |
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[4382] | 57 | extern void TopSelect(); |
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[5059] | 58 | extern Boolean nocache; |
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[4355] | 59 | extern char axis[]; |
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| 60 | |
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[5967] | 61 | int next=0, prev=0; |
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| 62 | static int nref = 0, pref=0, fref=0, lref=0; |
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[3914] | 63 | static int first=0, last=0; |
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| 64 | static int highestseen; |
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| 65 | static int current; |
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| 66 | |
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| 67 | static int cache[NUM_CACHED_FILES] = {-1,-1,-1,-1,-1}; |
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[3941] | 68 | static char currentmtglong[LONGNAMELEN] = ""; |
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| 69 | static char currentmtgshort[SHORTNAMELEN] = ""; |
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[3914] | 70 | |
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[5059] | 71 | char *GetTransactionFile(); |
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| 72 | |
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[3914] | 73 | char * |
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[3941] | 74 | CurrentMtg(which) |
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| 75 | int which; |
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[3914] | 76 | { |
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[3941] | 77 | if (which == 0) |
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| 78 | return (currentmtglong); |
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| 79 | else |
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| 80 | return (currentmtgshort); |
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[3914] | 81 | } |
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| 82 | |
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| 83 | int |
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[4382] | 84 | SaveMeetingNames(newlong, newshort) |
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[3941] | 85 | char *newlong; |
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| 86 | char *newshort; |
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[3914] | 87 | { |
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[3941] | 88 | char oldlong[LONGNAMELEN]; |
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| 89 | char oldshort[SHORTNAMELEN]; |
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| 90 | if (*currentmtglong) { |
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[3914] | 91 | MarkLastRead(); |
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| 92 | DeleteOldTransactions(); |
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| 93 | } |
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| 94 | |
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[3941] | 95 | if (*newlong) { |
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| 96 | strcpy (oldlong, currentmtglong); |
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| 97 | strcpy (currentmtglong, newlong); |
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| 98 | strcpy (oldshort, currentmtgshort); |
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| 99 | strcpy (currentmtgshort, newshort); |
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[4382] | 100 | if (SetUpTransactionNumbers() == -1) { |
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[3941] | 101 | strcpy (currentmtglong, oldlong); |
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| 102 | strcpy (currentmtgshort, oldshort); |
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[3914] | 103 | return (-1); |
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| 104 | } |
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| 105 | } |
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| 106 | |
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| 107 | else { |
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[3941] | 108 | *currentmtglong = '\0'; |
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| 109 | *currentmtgshort = '\0'; |
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[3914] | 110 | } |
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| 111 | return (0); |
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| 112 | } |
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| 113 | |
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| 114 | /* |
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| 115 | ** GoToTransaction updates the data structures and cache so that |
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| 116 | ** we are in a particular transaction. |
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| 117 | ** |
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| 118 | ** if 'update' is True (it usually is) we put the contents of the |
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| 119 | ** transaction into the lower text widget. |
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| 120 | */ |
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| 121 | |
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| 122 | GoToTransaction (num, update) |
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| 123 | int num; |
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| 124 | Boolean update; |
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| 125 | { |
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[3941] | 126 | static char command[LONGNAMELEN + 25]; |
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[5059] | 127 | char *filename; |
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[3914] | 128 | char *returndata; |
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[5059] | 129 | int transactionnum; |
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[3914] | 130 | |
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| 131 | if (!num) return; |
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| 132 | |
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[5059] | 133 | if (num < 0) |
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| 134 | transactionnum = TransactionNum(num); |
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| 135 | else |
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| 136 | transactionnum = num; |
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[3914] | 137 | |
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[4355] | 138 | if (update && topscreen == LISTTRNS); |
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[5059] | 139 | UpdateHighlightedTransaction(transactionnum); |
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[3914] | 140 | |
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| 141 | sprintf (command, "Reading %s [%d-%d], #%d...", |
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[5059] | 142 | currentmtglong, first, last, transactionnum); |
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[3914] | 143 | PutUpStatusMessage(command); |
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| 144 | |
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[5059] | 145 | if ((filename = GetTransactionFile(num)) == (char *) -1) |
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[3914] | 146 | return (-1); |
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| 147 | |
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| 148 | if (update) |
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| 149 | FileIntoWidget(filename, bottextW); |
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| 150 | |
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[5059] | 151 | sprintf (command, "(gti %d %s)\n", transactionnum, currentmtglong); |
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[3914] | 152 | returndata = RunCommand (command, NULL, NULL, True); |
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| 153 | |
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| 154 | if ((int) returndata <= 0) goto DONE; |
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| 155 | |
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| 156 | sscanf ( returndata, |
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| 157 | "%*c%d%d%d%d%d%d%d%*s", |
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| 158 | ¤t, &prev, &next, &pref, |
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| 159 | &nref, &fref, &lref); |
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| 160 | |
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| 161 | myfree(returndata); |
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| 162 | CheckButtonSensitivity(BUTTONS_UPDATE); |
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| 163 | |
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[5059] | 164 | if (!nocache) |
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| 165 | CacheSurroundingTransactions(); |
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[3914] | 166 | |
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| 167 | if ( current > highestseen) |
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| 168 | highestseen = current; |
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| 169 | |
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[4398] | 170 | if ( next > last || current > last) { |
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| 171 | MarkLastRead(); |
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| 172 | (void) SetUpTransactionNumbers(); |
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| 173 | } |
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| 174 | |
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[4355] | 175 | if (highestseen == last && topscreen == MAIN) |
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[3941] | 176 | RemoveLetterC(); |
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[3914] | 177 | DONE: |
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| 178 | sprintf (command, "Reading %s [%d-%d], #%d", |
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[5059] | 179 | currentmtglong, first, last, transactionnum); |
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[3914] | 180 | PutUpStatusMessage(command); |
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| 181 | } |
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| 182 | |
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| 183 | DeleteOldTransactions() |
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| 184 | { |
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| 185 | char filename[80]; |
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| 186 | unsigned int fd; |
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| 187 | |
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| 188 | DeleteTransactionFile(current); |
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| 189 | DeleteTransactionFile(prev); |
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| 190 | DeleteTransactionFile(next); |
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| 191 | DeleteTransactionFile(pref); |
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| 192 | DeleteTransactionFile(nref); |
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| 193 | |
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| 194 | sprintf (filename, "%s-list", filebase); |
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| 195 | if ((fd = open(filename, O_RDONLY)) != -1) { |
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| 196 | close (fd); |
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| 197 | unlink (filename); |
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| 198 | } |
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| 199 | |
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| 200 | next=0, prev=0, nref=0; |
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| 201 | pref=0, fref=0, lref=0; |
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| 202 | first=0, last=0, current=0; |
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| 203 | } |
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| 204 | |
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| 205 | /* |
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| 206 | ** Read in the transactions immedidately before and after the |
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| 207 | ** current one. |
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| 208 | */ |
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| 209 | |
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| 210 | CacheSurroundingTransactions() |
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| 211 | { |
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| 212 | |
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| 213 | int i; |
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| 214 | |
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| 215 | /* |
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| 216 | ** Remove unnecessary files |
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| 217 | */ |
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| 218 | |
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| 219 | for (i = 0; i < NUM_CACHED_FILES; i++) { |
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| 220 | if ( cache[i] != next && cache[i] != prev && |
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| 221 | cache[i] != nref && cache[i] != pref && |
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| 222 | cache[i] != current && cache[i] != -1) { |
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| 223 | |
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| 224 | DeleteTransactionFile(cache[i]); |
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| 225 | } |
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| 226 | } |
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| 227 | |
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| 228 | /* |
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| 229 | ** Get the files we need |
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| 230 | */ |
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| 231 | (void) GetTransactionFile (next); |
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| 232 | (void) GetTransactionFile (prev); |
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| 233 | (void) GetTransactionFile (nref); |
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| 234 | (void) GetTransactionFile (pref); |
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| 235 | (void) GetTransactionFile (current); |
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| 236 | |
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| 237 | } |
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| 238 | |
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| 239 | /* |
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| 240 | ** Remove the file from /tmp and the cache. |
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| 241 | */ |
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| 242 | |
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| 243 | DeleteTransactionFile(num) |
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| 244 | int num; |
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| 245 | { |
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| 246 | char filename[50]; |
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| 247 | int i; |
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| 248 | |
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| 249 | sprintf (filename, "%s-%d", filebase, num); |
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| 250 | unlink (filename); |
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| 251 | |
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| 252 | for (i = 0; i < NUM_CACHED_FILES; i++) |
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| 253 | if (cache[i] == num) |
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| 254 | cache[i] = -1; |
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| 255 | } |
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| 256 | |
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| 257 | /* |
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[5059] | 258 | ** This function behaves differently depending on the version of |
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| 259 | ** edsc we're talking to. |
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| 260 | ** |
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| 261 | ** If edsc is doing the caching, just ask for the transaction and |
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| 262 | ** return the filename. |
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| 263 | ** |
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| 264 | ** If we're doing the caching, ask if the file is already in the cache, |
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| 265 | ** and return the filename if it is. Otherwise, run the |
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| 266 | ** edsc command to fetch it, note it as cached, and return the filename. |
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| 267 | ** |
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[3914] | 268 | */ |
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| 269 | |
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[5059] | 270 | char * |
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[3914] | 271 | GetTransactionFile(num) |
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| 272 | int num; |
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| 273 | { |
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[5059] | 274 | static char filename[50]; |
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| 275 | char command[LONGNAMELEN + 25]; |
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| 276 | int i; |
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| 277 | char *retval; |
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| 278 | int transactionnum; |
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| 279 | int direction; |
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[3914] | 280 | |
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| 281 | if (num == 0) |
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[5059] | 282 | return((char *)-1); |
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[3914] | 283 | |
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[5059] | 284 | /* |
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| 285 | ** have we been passed a symbol instead of a number? |
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| 286 | */ |
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[3914] | 287 | |
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[5059] | 288 | if (num < 0) |
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| 289 | transactionnum = TransactionNum(num); |
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| 290 | else |
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| 291 | transactionnum = num; |
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[3914] | 292 | |
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[5059] | 293 | if (!nocache) |
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| 294 | sprintf (filename, "%s-%d", filebase, transactionnum); |
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[3914] | 295 | /* |
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[5059] | 296 | ** See if the file is in our cache. If so, return its filename;. |
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[3914] | 297 | */ |
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[5059] | 298 | if (!nocache) { |
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| 299 | for (i = 0; i < NUM_CACHED_FILES; i++) { |
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| 300 | if (cache[i] == num) { |
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| 301 | return (filename); |
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| 302 | } |
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| 303 | } |
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| 304 | } |
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[3914] | 305 | |
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[5059] | 306 | /* |
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| 307 | ** If file doesn't exist, go get it. |
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| 308 | */ |
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| 309 | if (nocache) { |
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| 310 | switch (num) { |
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| 311 | case NEXT: |
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| 312 | direction = CACHE_DIR_NEXT; |
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| 313 | break; |
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| 314 | case PREV: |
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| 315 | direction = CACHE_DIR_PREV; |
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| 316 | break; |
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| 317 | case NREF: |
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| 318 | direction = CACHE_DIR_NREF; |
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| 319 | break; |
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| 320 | case PREF: |
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| 321 | direction = CACHE_DIR_PREF; |
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| 322 | break; |
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| 323 | default: |
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| 324 | direction = 0; |
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| 325 | break; |
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| 326 | } |
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[3914] | 327 | |
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[5059] | 328 | sprintf ( command, "(gtfc %d %d %s)\n", |
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| 329 | direction, transactionnum, currentmtglong); |
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[3914] | 330 | |
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[5059] | 331 | retval = RunCommand (command, NULL, NULL, True); |
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| 332 | if ((int) retval <= 0) |
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| 333 | return((char *)-1); |
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| 334 | sscanf (retval, "(\"%[^\"]", filename); |
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| 335 | } |
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| 336 | |
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| 337 | else { |
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| 338 | sprintf ( command, "(gtf %s %d %s)\n", |
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| 339 | filename, transactionnum, currentmtglong); |
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| 340 | retval = RunCommand (command, NULL, NULL, True); |
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| 341 | if ((int) retval <= 0) |
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| 342 | return((char *)-1); |
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| 343 | |
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| 344 | for (i = 0; i < NUM_CACHED_FILES; i++) { |
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| 345 | if (cache[i] == -1) { |
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| 346 | cache[i] = num; |
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| 347 | break; |
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| 348 | } |
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[3914] | 349 | } |
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[5059] | 350 | } |
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[3914] | 351 | |
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[5059] | 352 | myfree (retval); |
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| 353 | return (filename); |
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[3914] | 354 | } |
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| 355 | |
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| 356 | /* |
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| 357 | ** Return the highestseen from mtg. Also set first, last, and highestseen. |
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[4382] | 358 | ** Set current to highestseen if it's not already set (ie, we've just |
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| 359 | ** entered the meeting) |
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| 360 | ** |
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[3914] | 361 | ** Return -1 if something went wrong. |
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| 362 | */ |
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| 363 | |
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| 364 | int |
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[4382] | 365 | SetUpTransactionNumbers() |
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[3914] | 366 | { |
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| 367 | |
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[3941] | 368 | char command[LONGNAMELEN + 25]; |
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[3914] | 369 | char *retval; |
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| 370 | static int oldhighestseen = 0; |
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| 371 | |
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[3941] | 372 | sprintf (command, "(gmi %s)\n", currentmtglong); |
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[3914] | 373 | |
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| 374 | retval = RunCommand (command, NULL, NULL, True); |
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| 375 | if ((int) retval <= 0) return (-1); |
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| 376 | |
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[4355] | 377 | sscanf (retval, "(\"%*[^\"]\" \"%*[^\"]\" \"%*[^\"]\" %d %d %*d %*d \"%*[^\"]\" \"%*[^\"]\" %*d \"%[^\"]\" %d", |
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| 378 | &first, &last, axis, &highestseen); |
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[3914] | 379 | |
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| 380 | oldhighestseen = highestseen; |
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| 381 | |
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[3941] | 382 | if (last == 0 && first == 0) { |
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[3914] | 383 | fprintf (stderr,"xdsc: Reply out of sync with request!\n"); |
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| 384 | fprintf (stderr,"xdsc: requested '%s', got '%s'\n",command, retval); |
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| 385 | PutUpWarning( "INTERNAL ERROR DETECTED", |
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| 386 | "I suggest you quit immediately to avoid\npossible corruption of your .meetings file.", True); |
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| 387 | myfree(retval); |
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| 388 | return (-1); |
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| 389 | } |
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| 390 | myfree(retval); |
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| 391 | |
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| 392 | if (highestseen > last) { |
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| 393 | PutUpWarning( "WARNING", |
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| 394 | "The highest-read transaction in this\nmeeting no longer exists.\nGoing to end of the meeting.", True); |
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| 395 | highestseen = last; |
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| 396 | } |
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| 397 | |
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| 398 | if (debug) { |
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| 399 | fprintf (stderr, "highestseen message of %s is %d\n", |
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[3941] | 400 | currentmtglong, highestseen); |
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[3914] | 401 | |
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| 402 | fprintf (stderr, "first is %d, last is %d\n",first, last); |
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| 403 | } |
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| 404 | |
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[4382] | 405 | GoToTransaction (highestseen, False); |
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| 406 | |
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[3914] | 407 | return (highestseen); |
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| 408 | } |
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| 409 | |
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| 410 | MarkLastRead() |
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| 411 | { |
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[3941] | 412 | static char command[LONGNAMELEN + 25]; |
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[3914] | 413 | |
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[4641] | 414 | if (*currentmtglong) { |
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[3914] | 415 | sprintf ( command, |
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| 416 | "(ss %d %s)\n", |
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| 417 | highestseen, |
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[3941] | 418 | currentmtglong); |
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[4641] | 419 | if (edscversion >= 24) |
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| 420 | (void) RunCommand (command, NULL, NULL, True); |
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| 421 | else |
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| 422 | (void) RunCommand (command, NULL, NULL, False); |
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[3914] | 423 | } |
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| 424 | |
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| 425 | } |
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| 426 | |
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| 427 | TransactionNum(arg) |
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| 428 | int arg; |
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| 429 | { |
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| 430 | switch (arg) { |
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| 431 | case NEXT: |
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| 432 | return(next); |
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| 433 | case PREV: |
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| 434 | return(prev); |
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| 435 | case NREF: |
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| 436 | return(nref); |
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| 437 | case PREF: |
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| 438 | return(pref); |
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[5967] | 439 | case LREF: |
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| 440 | return(lref); |
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| 441 | case FREF: |
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| 442 | return(fref); |
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[3914] | 443 | case FIRST: |
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| 444 | return(first); |
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| 445 | case LAST: |
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| 446 | return(last); |
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| 447 | case CURRENT: |
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| 448 | return(current); |
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| 449 | case HIGHESTSEEN: |
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| 450 | return(highestseen); |
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| 451 | default: |
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| 452 | fprintf (stderr, "Unknown arg to TransactionNum: %d\n", arg); |
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| 453 | return(0); |
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| 454 | } |
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| 455 | } |
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| 456 | |
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| 457 | MoveToMeeting(which) |
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| 458 | int which; |
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| 459 | { |
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[3941] | 460 | Arg args[2]; |
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[4382] | 461 | Boolean transactionflag = False; |
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[3941] | 462 | /* |
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[4382] | 463 | ** If we're currently showing transactions, we have to restore the top-level |
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| 464 | ** list of meetings. |
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[3941] | 465 | */ |
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[4382] | 466 | if (topscreen == LISTTRNS) { |
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| 467 | XawTextDisableRedisplay(toptextW); |
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| 468 | TopSelect (NULL, 4 + (1 << 4)); |
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| 469 | transactionflag = True; |
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| 470 | } |
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[3914] | 471 | |
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[4382] | 472 | /* |
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| 473 | ** HighlightNewItem will eventually call SaveMeetingNames and |
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| 474 | ** SetUpTransactionNumbers to get the next, prev, etc. vars set. |
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| 475 | */ |
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[3914] | 476 | if (HighlightNewItem(toptextW, which, True) == 0) { |
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[4382] | 477 | |
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| 478 | /* |
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| 479 | ** Need to restore transaction list? |
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| 480 | */ |
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| 481 | if (transactionflag == True) { |
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| 482 | TopSelect (NULL, 4 + (0 << 4)); |
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| 483 | XawTextEnableRedisplay(toptextW); |
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| 484 | } |
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| 485 | |
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| 486 | /* |
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| 487 | ** Clear out bottom text window. |
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| 488 | */ |
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[3914] | 489 | XtSetArg (args[0], XtNstring, ""); |
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[3941] | 490 | XtSetArg (args[1], XtNlength, 0); |
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[3914] | 491 | XtSetValues (bottextW, args, 1); |
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[4382] | 492 | |
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| 493 | /* |
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| 494 | ** If we're at the end of the meeting, make it so the "next" button |
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| 495 | ** will show us the last transaction. |
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| 496 | */ |
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| 497 | if (next == 0) |
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| 498 | next = last; |
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| 499 | |
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[3914] | 500 | CheckButtonSensitivity(BUTTONS_ON); |
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| 501 | return (0); |
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| 502 | } |
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| 503 | |
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| 504 | else { |
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| 505 | return (-1); |
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| 506 | } |
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| 507 | } |
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| 508 | |
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| 509 | /* |
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| 510 | ** Make sure bottom buttons are set appropriately, according to context |
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| 511 | ** and mode. |
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| 512 | ** |
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| 513 | ** Mode = BUTTONS_UPDATE: turn on appropriate buttons, if sensitive = True. |
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| 514 | ** Mode = BUTTONS_OFF: Turn off all buttons. Set sensitive = False. |
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| 515 | ** Mode = BUTTONS_ON: Turn on appropriate buttons. Set sensitive = True. |
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| 516 | ** |
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| 517 | */ |
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| 518 | CheckButtonSensitivity(mode) |
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| 519 | int mode; |
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| 520 | { |
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| 521 | static Boolean sensitive = True; |
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[4355] | 522 | Arg args[2]; |
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[3914] | 523 | |
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| 524 | if (mode == BUTTONS_ON) sensitive = True; |
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| 525 | if (mode == BUTTONS_OFF) sensitive = False; |
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| 526 | |
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[4355] | 527 | if (next && sensitive) { |
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[3914] | 528 | XtSetArg(args[0], XtNsensitive, True); |
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[4355] | 529 | XtSetArg(args[1], XtNborderWidth, 1); |
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| 530 | } |
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| 531 | else { |
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[3914] | 532 | XtSetArg(args[0], XtNsensitive, False); |
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[4355] | 533 | XtSetArg(args[1], XtNborderWidth, 4); |
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| 534 | } |
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| 535 | XtSetValues ((toplevelbuttons[1][0]).button, args, 2); |
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[3914] | 536 | |
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| 537 | if (prev && sensitive) |
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| 538 | XtSetArg(args[0], XtNsensitive, True); |
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| 539 | else |
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| 540 | XtSetArg(args[0], XtNsensitive, False); |
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[4355] | 541 | XtSetValues ((toplevelbuttons[1][1]).button, args, 1); |
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[3914] | 542 | |
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| 543 | if (nref && sensitive) |
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| 544 | XtSetArg(args[0], XtNsensitive, True); |
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| 545 | else |
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| 546 | XtSetArg(args[0], XtNsensitive, False); |
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[4355] | 547 | XtSetValues ((toplevelbuttons[1][2]).button, args, 1); |
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[3914] | 548 | |
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| 549 | if (pref && sensitive) |
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| 550 | XtSetArg(args[0], XtNsensitive, True); |
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| 551 | else |
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| 552 | XtSetArg(args[0], XtNsensitive, False); |
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[4355] | 553 | XtSetValues ((toplevelbuttons[1][3]).button, args, 1); |
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[3914] | 554 | |
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[4355] | 555 | if (topscreen == LISTTRNS && sensitive) |
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[3914] | 556 | XtSetArg(args[0], XtNsensitive, True); |
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| 557 | else |
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| 558 | XtSetArg(args[0], XtNsensitive, False); |
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[4355] | 559 | XtSetValues ((toplevelbuttons[0][5]).button, args, 1); |
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[3914] | 560 | |
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[4355] | 561 | if (axis[0] == ' ' && axis[6] == ' ') |
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| 562 | XtSetArg(args[0], XtNsensitive, False); |
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| 563 | else |
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[3914] | 564 | XtSetArg(args[0], XtNsensitive, True); |
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[4355] | 565 | XtSetValues ((toplevelbuttons[1][5]).button, args, 1); |
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| 566 | |
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| 567 | if (axis[0] == ' ') |
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| 568 | XtSetArg(args[0], XtNsensitive, False); |
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[3914] | 569 | else |
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[4355] | 570 | XtSetArg(args[0], XtNsensitive, True); |
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| 571 | XtSetValues ((toplevelbuttons[1][5]).nextrec->button, args, 1); |
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| 572 | |
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| 573 | if (axis[6] == ' ') |
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[3914] | 574 | XtSetArg(args[0], XtNsensitive, False); |
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[4355] | 575 | else |
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[3914] | 576 | XtSetArg(args[0], XtNsensitive, True); |
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[4355] | 577 | XtSetValues ((toplevelbuttons[1][5]).nextrec->nextrec->button, args, 1); |
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[3914] | 578 | |
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[4355] | 579 | XtSetArg(args[0], XtNsensitive, False); |
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| 580 | XtSetValues ((toplevelbuttons[1][6]).nextrec->nextrec->button, args, 1); |
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[3914] | 581 | } |
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