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1.1 root 1: /*** SSE - Simple Screen Editor
2: *
3: *
4: *
5: *
6: *
7: *
8: *
9: *
10: */
11:
12:
13:
14: #include <ctype.h>
15: #include <doscalls.h>
16: #include <dos.h>
17: #include <stdlib.h>
18: #include <stdio.h>
19: #include <subcalls.h>
20: #include "ssedefs.h"
21:
22:
23: unsigned short TotalLines; /* num of entries in line table */
24: struct Line far *LineTable[MAXLINES]; /* the line table */
25:
26: unsigned short TotalSegs; /* num of entries in seg table */
27: struct SegEntry SegTable[MAXSEGS];
28:
29: char fbuffer[FBUFFSIZE];
30: unsigned short bytesread;
31:
32: unsigned char ScrBuff[LONGPAGE][LINESIZE];
33: unsigned char EditBuff[LINESIZE];
34: unsigned short EditBuffDirty;
35:
36: unsigned short PageSize;
37: unsigned short Mode43Set = 0;
38:
39: unsigned short ForeNorm = 0x07;
40: unsigned short BackNorm = 0x10;
41: unsigned short ForeHilite = 0x01;
42: unsigned short BackHilite = 0x70;
43: unsigned short Fore25 = 0x07;
44: unsigned short Back25 = 0x40;
45:
46: unsigned short CurRow, CurCol;
47: unsigned short TopRow;
48:
49: unsigned short LinesMarked, CharsMarked;
50: unsigned short MarkedLine[MAXLINES], MarkedChar[LINESIZE];
51:
52: char *fname;
53: unsigned short fhandle;
54:
55: /*** main
56: *
57: *
58: *
59: */
60:
61: main(argc, argv)
62: int argc;
63: char *argv[];
64: {
65: unsigned short i;
66:
67: unsigned short handtype, flagword;
68:
69: struct ModeData modedata; /* from subcalls.h */
70: struct CursorData cursordata;
71:
72:
73: /* check if we're in foreground */
74:
75: DOSQHANDTYPE( 0, (unsigned far *)&handtype, (unsigned far *)&flagword );
76: if( (handtype == 0) || ( !( flagword & 1 )) || ( !( flagword & 2 )) )
77: quit(1);
78:
79:
80: /* disable signals so user can't exit with Ctrl-C or Ctrl-Break */
81:
82: DOSHOLDSIGNAL( TRUE );
83:
84:
85: /* initialize variables */
86:
87: EditBuffDirty = 0;
88: LinesMarked = 0;
89: CharsMarked = 0;
90: for (i = 0; i < MAXLINES; i++)
91: MarkedLine[i] = 0;
92: for (i = 0; i < LINESIZE; i++)
93: MarkedChar[i] = 0;
94:
95: /* Set PageSize to match the mode we're in, 25 or 43.
96: This may be changed later by a switch from the command line. */
97:
98: modedata.length = sizeof( modedata );
99: VIOGETMODE( &modedata, 0 );
100: if( modedata.row == 25 )
101: PageSize = SHORTPAGE;
102: else PageSize = LONGPAGE;
103:
104: /* Parse file name */
105: if (argc < 2) {
106: error25(8);
107: quit(1);
108: }
109: else if (argc < 4) {
110: for( i = 1; i < (argc-1); i++ ) {
111: if( (argv[i][0] == '/') &&
112: ( argv[i][1] == '4' ) &&
113: ( argv[i][2] == '3' ) ) {
114: PageSize = LONGPAGE;
115: modedata.row = ( LONGPAGE + 1 );
116: VIOSETMODE( &modedata, 0 );
117: cursordata.cur_start = 6;
118: cursordata.cur_end = 7;
119: cursordata.cur_width = 1;
120: cursordata.cur_attribute = 0;
121: VIOSETCURTYPE( &cursordata, 0 );
122: Mode43Set = 1;
123: }
124: else if( (argv[i][0] == '/') &&
125: ( (argv[i][1] == 'B') || (argv[i][1] == 'b') ) &&
126: ( (argv[i][2] == 'W') || (argv[i][2] == 'w') ) ) {
127: ForeNorm = 0x07;
128: BackNorm = 0;
129: ForeHilite = 0;
130: BackHilite = 0x70;
131: Fore25 = 0;
132: Back25 = 0x70;
133: }
134: else {
135: error25(9);
136: quit(1);
137: }
138:
139: }
140: fname = argv[i];
141: }
142: else {
143: error25(10);
144: quit(1);
145: }
146:
147: /* paint the screen */
148: clearscr();
149: drawscr(0);
150:
151: /* read file */
152: switch (openfile(fname, &fhandle, FOFLAG)) {
153: case 0:
154: if (readfile(fhandle))
155: error25(1);
156: if (backupfile(fname, fhandle))
157: error25(2);
158: break;
159:
160: case 110:
161: /* create the file */
162: error25(3);
163: if (openfile(fname, &fhandle, CFFLAG))
164: error25(4); /* error creating file */
165: break;
166:
167: case 32:
168: /* denied write access */
169: error25(5);
170: break;
171:
172: default :
173: /* error on opening file */
174: error25(6);
175: break;
176: }
177:
178:
179: /* if open worked, continue */
180:
181: drawscr(0);
182: name25();
183: VIOSETCURPOS(0,0,0);
184: getline( 0, &EditBuff[0] ); /* initialize */
185: dispatch();
186: freesegs();
187: }
188:
189:
190:
191:
192: quit(n) /* if we set 43 line mode from command line, */
193: unsigned short n; /* set it back to 25 line mode before exiting */
194: {
195: struct ModeData modedata;
196: struct CursorData cursordata;
197:
198: if( Mode43Set ) {
199: modedata.length = sizeof( modedata );
200: VIOGETMODE( &modedata, 0 );
201: modedata.row = 25;
202: VIOSETMODE( &modedata, 0 );
203: cursordata.cur_start = 12;
204: cursordata.cur_end = 13;
205: cursordata.cur_width = 1;
206: cursordata.cur_attribute = 0;
207: VIOSETCURTYPE( &cursordata, 0 );
208: BackNorm = 0;
209: ForeNorm = 0;
210: clearscr();
211: }
212: DOSEXIT(1,n); /* exit with specified completion code */
213: }
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