1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
#include <stdio.h>
#include <stdlib.h>
FILE *f1, *f2;
FILE *out;
int numdiffs;
struct ROMdiff {
unsigned long start;
unsigned long value;
int len;
};
#define MAX_DIFFS 200
static struct ROMdiff diffs[MAX_DIFFS];
static void dumpdiff(unsigned long start, int len)
{
unsigned int c1, c2, c3, c4;
int i;
long pos;
if (numdiffs >= MAX_DIFFS)
{
fprintf(stderr, "too many diffs, aborting\n");
exit(1);
}
if (!(start & 1) && (len & 1))
len++;
else if ((start & 1) && (len & 1))
start--, len++;
fprintf(out, "/* %06lx */\nstatic unsigned char const romdiff_%d[%d] = { ", start, numdiffs, len);
pos = ftell(f2);
fseek(f2, start, SEEK_SET);
for (i = 0; i < len; )
{
c2 = fgetc(f2);
fprintf(out, "0x%02x", c2);
++i;
if (i != len)
fputs(", ", out);
}
fputs(" };\n", out);
fseek(f2, pos, SEEK_SET);
diffs[numdiffs].start = start;
diffs[numdiffs].len = len;
pos = ftell(f1);
fseek(f1, start, SEEK_SET);
c1 = fgetc(f1);
c2 = fgetc(f1);
c3 = fgetc(f1);
c4 = fgetc(f1);
diffs[numdiffs].value = (c1 << 24) | (c2 << 16) | (c3 << 8) | (c4 << 0);
fseek(f1, pos, SEEK_SET);
numdiffs++;
}
int main(int argc, char **argv)
{
char *n1, *n2;
unsigned long ptr;
unsigned long diffstart = 0;
int difflen = 0;
int i;
if (argc != 3)
{
fprintf(stderr, "Usage: %s file1 file2\n", argv[0]);
return 1;
}
n1 = argv[1];
n2 = argv[2];
f1 = fopen(n1, "rb");
if (f1 == NULL)
{
fprintf(stderr, "Error opening '%s'\n", n1);
return 2;
}
f2 = fopen(n2, "rb");
if (f2 == NULL)
{
fprintf(stderr, "Error opening '%s'\n", n2);
fclose(f1);
return 3;
}
out = stdout;
ptr = 0;
numdiffs = 0;
fprintf(out, "\
/*\n\
* This is the list of neccessary changes\n\
* for patching the original TOS 4.04 for 68040 compatibility.\n\
*\n\
* Autogenerated by tools/romdiff.c tool\n\
*/\n\
\n\
#include \"romdiff.h\"\n\
\n");
while (!feof(f1) && !feof(f2))
{
unsigned char c1, c2;
c1 = fgetc(f1);
c2 = fgetc(f2);
if (c1 != c2)
{
if (difflen == 0)
diffstart = ptr;
difflen++;
ptr++;
} else if (difflen != 0)
{
/* peek at next chars; if they are different again, continue */
c1 = fgetc(f1);
c2 = fgetc(f2);
if (c1 == c2)
{
dumpdiff(diffstart, difflen);
difflen = 0;
ptr += 2;
} else
{
difflen += 2;
ptr += 2;
}
} else
{
ptr++;
}
}
if (difflen != 0)
dumpdiff(diffstart, difflen);
fprintf(out, "\n");
fprintf(out, "ROMdiff const tosdiff[] = {\n");
for (i = 0; i < numdiffs; i++)
{
fprintf(out, "\t{ 0x%06lx, 0x%08lx, %3d, romdiff_%d },\n", diffs[i].start, diffs[i].value, diffs[i].len, i);
}
fprintf(out, "\t{ 0, 0, 0, 0 }\n};\n");
fflush(out);
fclose(f1);
fclose(f2);
}
|
