1: /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1984. */
   2: static char rcsid[] = "$Header: main.c,v 2.5 85/08/22 16:05:00 timo Exp $";
   3: 
   4: /*
   5:  * B editor -- Main program (init/exit processing), error handling.
   6:  */
   7: 
   8: /*
   9:  * The B editor is a structured editor for a programming language
  10:  * for beginners and non-professional computer users.
  11:  * [L.G.L.T. Meertens: Draft Proposal for the B programming language,
  12:  * Mathematical Centre, Amsterdam, 1982, ISBN 90 6169 238 2.]
  13:  * Note that `B' is only a provisional name for the language.
  14:  * The editor uses a subset of the run-time system for the B
  15:  * interpreter, so that they may be linked together in a later stage.
  16:  * Also the sharing strategy of the B run-time routines makes a very
  17:  * elegant and powerful UNDO-mechanism possible.
  18:  */
  19: 
  20: #include "b.h" /* Contains definitions like string, etc. */
  21: #include "feat.h"
  22: #include "bobj.h"
  23: 
  24: 
  25: #ifdef SAVEPOS
  26: #define SAVEPOSFILE ".Bed_pos" /* Last focus position database */
  27: #define MAXSAVE 50 /* Maximum number of entries kept in SAVEPOSFILE */
  28: #endif SAVEPOS
  29: 
  30: 
  31: /* Command line flags */
  32: 
  33: bool dflag; /* -d: debugging output wanted */
  34: 
  35: bool slowterminal;
  36:     /* -s: the terminal is so slow that long messages are annoying */
  37: 
  38: bool hushbaby; /* -h: no bells are to be heard */
  39: 
  40: #ifdef COMMENTED_OUT /* Lower levels don't respond to this */
  41: bool nostandout; /* -n: inhibit use of standout */
  42: #endif COMMENTED_OUT
  43: 
  44: 
  45: /*
  46:  * Main program -- call module initializations, do some work,
  47:  * call module shut-off code, exit.
  48:  */
  49: 
  50: Visible Procedure
  51: main(argc, argv)
  52:     int argc;
  53:     string *argv;
  54: {
  55:     bool initdone = No;
  56:     bool status = Yes;
  57:     int lineno = 0;
  58:     string arg0 = argv[0];
  59:     string cp;
  60:     string filename;
  61:     extern string malloc();
  62: 
  63:     cp = rindex(arg0, '/');
  64:     if (cp)
  65:         arg0 = cp+1;
  66: 
  67:     /* Process UNIX command line options */
  68:     for (; argc > 1 && argv[1][0] == '-'; --argc, ++argv) {
  69:         switch (argv[1][1]) {
  70: 
  71: #ifndef NDEBUG
  72:         case 'd':
  73:             dflag = Yes;
  74:             break;
  75: #endif NDEBUG
  76: 
  77:         case 'h':
  78:             hushbaby = Yes;
  79:             break;
  80: 
  81: #ifdef COMMENTED_OUT /* Lower levels don't respond to this */
  82:         case 'n':
  83:             nostandout = Yes;
  84:             break;
  85: #endif COMMENTED_OUT
  86: 
  87:         case 's':
  88:             slowterminal = Yes;
  89:             break;
  90: 
  91:         default:
  92:             fprintf(stderr,
  93:                 "*** Usage: %s [-h] [-s] %s\n",
  94:                 arg0,
  95: #ifdef FILEARGS
  96:                 "[ [+lineno] file ] ...");
  97: #else !FILEARGS
  98:                 "");
  99: #endif !FILEARGS
 100:             exit(1);
 101: 
 102:         }
 103:     }
 104: 
 105:     /* Setbuf must be called before any output is produced! */
 106:     setbuf(stdout, malloc((unsigned)BUFSIZ));
 107: 
 108: #ifdef FILEARGS
 109:     for (; status && argc > 1; --argc, ++argv) {
 110:         if (argv[1][0] == '+') { /* +lineno option */
 111:             lineno = atoi(argv[1] + 1);
 112:         }
 113:         else {
 114:             filename = argv[1];
 115:             if (!initdone) {
 116:                 initall();
 117:                 initdone = Yes;
 118:             }
 119:             status = demo(filename, lineno);
 120:             lineno = 0;
 121:         }
 122:     }
 123: #endif FILEARGS
 124:     if (!initdone) {
 125: #ifdef BTOP
 126:         initall();
 127:         mainloop();
 128: #else BTOP
 129: #ifndef FILEARGS
 130:         Deliberate error. You should define at least one of BTOP and FILEARGS;
 131: #endif !FILEARGS
 132:         fprintf(stderr, "*** No file edited\n");
 133:         exit(0);
 134: #endif BTOP
 135:     }
 136:     endall();
 137:     objstats();
 138:     if (status)
 139:         objcheck();
 140:     else
 141:         objdump();
 142:     return !status;
 143: }
 144: 
 145: 
 146: /*
 147:  * Module initializations -- for each module xxxx that needs dynamic
 148:  * initialization, call a routine named initxxxx.
 149:  * The order is determined by the inter-module dependencies.
 150:  * Also note that all terminal- and screen-related initializations are called
 151:  * indirectly by initterm().
 152:  */
 153: 
 154: Hidden Procedure
 155: initall()
 156: {
 157: #ifndef NDEBUG
 158:     if (dflag)
 159:         fprintf(stderr, "*** initall();\n\r");
 160: #endif NDEBUG
 161:     initfile();
 162:     initkeys();
 163:     initgram();
 164: #ifdef USERSUGG
 165:     initsugg();
 166: #endif USERSUGG
 167:     initunix();
 168:     initterm();
 169: }
 170: 
 171: 
 172: /*
 173:  * Module shut-off code -- for each module xxxx that needs dynamic
 174:  * shut-off code (what is the inverse of `initialization'?),
 175:  * call a routine named endxxxx.
 176:  * Endall is also called (from module "unix") when a signal or interrupt
 177:  * causes termination.
 178:  */
 179: 
 180: Visible Procedure
 181: endall()
 182: {
 183:     if (dflag)
 184:         fprintf(stderr, "*** endall();\n\r");
 185:     endterm();
 186:     enddemo();
 187:     endunix();
 188:     enderro();
 189: #ifdef USERSUGG
 190:     endsugg();
 191: #endif USERSUGG
 192: }
 193: 
 194: 
 195: 
 196: /*
 197:  * System error -- abort the editor with a short error message.
 198:  * Should only be called for catastrophic, unrecoverable errors
 199:  * or those that `cannot happen'.
 200:  */
 201: 
 202: /* VARARGS 1 */
 203: Visible Procedure
 204: syserr(fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10)
 205:     string fmt;
 206: {
 207: #ifdef BTOP
 208:     termchild();
 209: #endif BTOP
 210:     endall();
 211:     fprintf(stderr, "*** System error: ");
 212:     fprintf(stderr, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10);
 213:     fprintf(stderr, "\n");
 214: #ifndef NDEBUG
 215:     fprintf(stderr, "*** Core dump for B guru: ");
 216:     fflush(stderr);
 217:     abort();
 218: #else
 219:     fflush(stderr);
 220:     _exit(1);
 221: #endif
 222:     /* NOTREACHED */
 223: }
 224: 
 225: 
 226: /*
 227:  * Assertion error.
 228:  * Call syserr with information about where something was wrong.
 229:  * (Sorry, WHAT was wrong must be dug out of the core dump.)
 230:  */
 231: 
 232: Visible Procedure
 233: asserr(file, line)
 234:     string file;
 235:     int line;
 236: {
 237:     syserr("Assertion failed: file %s, line %d", file, line);
 238:     /* NOTREACHED */
 239: }

Defined functions

asserr defined in line 232; never used
endall defined in line 180; used 3 times
initall defined in line 154; used 2 times
main defined in line 50; never used
syserr defined in line 203; used 1 times

Defined variables

hushbaby defined in line 38; used 2 times
nostandout defined in line 41; used 1 times
  • in line 83
rcsid defined in line 2; never used
slowterminal defined in line 35; used 3 times

Defined macros

MAXSAVE defined in line 27; never used
SAVEPOSFILE defined in line 26; never used
Last modified: 1985-08-27
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