source: buchla-68k/orig/GEMDOS/CSREC.C@ f40a309

Last change on this file since f40a309 was 3ae31e9, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Imported original source code.
  • Property mode set to 100755
File size: 4.3 KB
Line 
1/*
2 ============================================================================
3 csrec.c -- Motorola S record format checker
4 Version 3 -- 1987-07-10 -- D.N. Lynx Crowe
5 ============================================================================
6*/
7
8#define CHECKER 0 /* define non-zero for main */
9
10#if CHECKER
11
12#define MAXBUFLN 2048 /* big enough for the longest expected record */
13
14#include "stdio.h"
15
16char iobuf[MAXBUFLN+1];
17char *fileid;
18
19#endif
20
21#include <stddefs.h>
22#include <ctype.h>
23
24#define SREC9 "04000000FB"
25
26static char ahex[] = "0123456789abcdefABCDEF";
27
28/*
29 */
30
31/*
32 ============================================================================
33 memcmpu -- compare two memory areas while ignoring case
34 ============================================================================
35*/
36
37int
38memcmpu(s1, s2, n)
39register char *s1, *s2;
40int n;
41{
42 register int c1, c2;
43
44 while (n) {
45
46 c1 = 0377 & *s1++;
47 c2 = 0377 & *s2++;
48
49 if (isascii(c1) && islower(c1))
50 c1 = _toupper(c1);
51
52 if (isascii(c2) && islower(c2))
53 c2 = _toupper(c2);
54
55 if (c1 < c2)
56 return(-1);
57
58 if (c1 > c2)
59 return(1);
60
61 n--;
62 }
63
64 return(0);
65}
66
67/*
68 */
69
70/*
71 ============================================================================
72 xdtoi -- convert hex ASCII to an int digit
73 ============================================================================
74*/
75
76static int
77xdtoi(c)
78register int c;
79{
80 register int i;
81 register char *ap = &ahex[0];
82
83 for (i = 0; i < 22; i++)
84 if (c EQ *ap++)
85 if (i >15)
86 return(i - 6);
87 else
88 return(i);
89
90 return(-1);
91}
92
93/*
94 */
95
96/*
97 ============================================================================
98 csrec -- check a Motorola S record for errors
99 ============================================================================
100*/
101
102int
103csrec(line)
104register char *line;
105{
106 register int c, len, i;
107
108 int csum, val;
109
110 if ('S' NE (c = *line++))
111 return(-1);
112
113 switch (c = *line++) {
114
115 case '2':
116
117 csum = 0;
118
119 if (isxdigit(c = *line++))
120 len = xdtoi(c);
121 else
122 return(-1);
123
124 if (isxdigit(c = *line++))
125 len = (len << 4) + xdtoi(c);
126 else
127 return(-1);
128
129 csum += (len & 0377);
130 len -= 4;
131
132 for (i = 0; i < 3; i++) {
133
134 if (isxdigit(c = *line++))
135 val = xdtoi(c);
136 else
137 return(-1);
138
139 if (isxdigit(c = *line++))
140 val = (val << 4) + xdtoi(c);
141 else
142 return(-1);
143
144 csum += (val & 0377);
145 }
146
147 for (i = 0; i < len; i++) {
148
149 if (isxdigit(c = *line++))
150 val = xdtoi(c);
151 else
152 return(-1);
153
154 if (isxdigit(c = *line++))
155 val = (val << 4) + xdtoi(c);
156 else
157 return(-1);
158
159 csum += (val & 0377);
160 }
161
162 csum = 0377 & ~csum;
163
164 if (isxdigit(c = *line++))
165 val = xdtoi(c);
166 else
167 return(-1);
168
169 if (isxdigit(c = *line++))
170 val = (val << 4) + xdtoi(c);
171 else
172 return(-1);
173
174 if (csum NE (val & 0377))
175 return(-1);
176
177 return(1);
178
179 case '9':
180
181 if (memcmpu(line, SREC9, 10) EQ 0)
182 return(0);
183 else
184 return(-1);
185
186 default:
187
188 return(-1);
189 }
190
191 return(-1);
192}
193
194/*
195 */
196
197#if CHECKER
198
199main(argc, argv)
200int argc;
201char **argv;
202{
203 FILE *sfile;
204 int rc;
205 long recnum;
206
207 if (argc < 2) {
208
209 printf("csrec: No file specified on input line.\n");
210 printf("csrec: Using stdin for input.\n");
211 sfile = stdin;
212 fileid = "stdin";
213
214 } else {
215
216 ++argv;
217 fileid = *argv;
218
219 if (NULL EQ (sfile = fopena(fileid, "r")) ) {
220
221 printf("csrec: Unable to open [%s]\n", fileid);
222 printf("csrec: Processing aborted.\n");
223 exit(1);
224 }
225 }
226
227 recnum = 0L;
228
229 do {
230
231 recnum++;
232 memset(iobuf, ' ', MAXBUFLN+1);
233 rc = fgets(iobuf, MAXBUFLN, sfile);
234
235 if (rc EQ NULL) {
236
237 printf("csrec: Could not read record %ld on [%s]\n",
238 recnum, fileid);
239
240 if (sfile NE stdin)
241 fclose(sfile);
242
243 printf("csrec: Processing aborted.\n");
244 exit(1);
245 }
246
247 if ((rc =csrec(iobuf)) < 0) {
248
249 printf("csrec: Record %ld on [%s] is in error\n",
250 recnum, fileid);
251
252 if (sfile NE stdin)
253 fclose(sfile);
254
255 printf("csrec: Processing aborted.\n");
256 exit(1);
257 }
258
259 } while (rc);
260
261 if (sfile NE stdin)
262 fclose(sfile);
263
264 printf("csrec: S-Record file [%s] is valid\n", fileid);
265 printf("csrec: Processing complete.\n");
266 exit(0);
267}
268
269#endif
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