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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include "get_address.h"
#include "xex.h"
#ifndef VERSION
#define VERSION "???"
#endif
#define SELF "xexcat"
#define OPTIONS "hvo:l:r:i:c"
char *usage =
SELF " v" VERSION " - by B. Watson (WTFPL)\n"
"Join one or more Atari 8-bit executables into one multi-segment file.\n"
"usage: " SELF " -[hvc] [-l address] [-i address] [-r address]\n"
" [-o outfile.xex] [infile1.xex] [infile2.xex ...]\n"
" -h Print this help\n"
" -o outfile.xex Output file (default: standard output)\n"
" -v Verbose operation\n"
" -c Check only; no output (same as -v -o/dev/null)\n"
" -l address Force first load address (decimal, $hex, or 0xhex)\n"
" -i address Force first init address\n"
" -r address Force run address\n";
int main(int argc, char **argv) {
xex_segment seg;
char *outfile = "-";
FILE *in, *out = stdout;
int count = 1, c, errcount = 0;
unsigned char buffer[65536]; /* be lazy: statically allocate large buffer */
int force_load = -1, force_run = -1, force_init = -1;
int read_stdin = 0;
/* parse args */
while( (c = getopt(argc, argv, OPTIONS)) > 0) {
switch(c) {
case 'h':
printf(usage);
exit(0);
break;
case 'v':
xex_verbose = 1;
break;
case 'o':
outfile = optarg;
break;
case 'c':
xex_verbose = 1;
outfile = "/dev/null";
break;
case 'l':
if( (force_load = get_address(SELF, optarg)) < 0 )
exit(1);
break;
case 'r':
if( (force_run = get_address(SELF, optarg)) < 0 )
exit(1);
break;
case 'i':
if( (force_init = get_address(SELF, optarg)) < 0 )
exit(1);
break;
default:
fprintf(stderr, usage);
exit(1);
}
}
/* special case if there are no input filenames */
if(argc <= optind) {
read_stdin = 1;
}
/* open outfile */
if(strcmp(outfile, "-") != 0) {
if( !(out = fopen(outfile, "wb")) ) {
fprintf(stderr, SELF ": %s: %s\n", outfile, strerror(errno));
exit(1);
}
} else if(isatty(fileno(out))) {
/* be polite... */
fprintf(stderr,
SELF ": Standard output is a terminal; not writing binary data\n"
"Run '" SELF " -h' for help\n");
exit(1);
} else {
outfile = "(standard output)";
}
/* only have to set seg.object once... */
seg.object = buffer;
/* process each input file on the command line */
while(read_stdin || (optind < argc)) {
char *infile = argv[optind++];
int filecount = 1;
if(read_stdin || strcmp(infile, "-") == 0) {
read_stdin = 0;
in = stdin;
infile = "(standard input)";
} else if( !(in = fopen(infile, "rb")) ) {
/* failure to open is NOT fatal (just skip it and move on) */
fprintf(stderr, SELF ": %s: %s\n", infile, strerror(errno));
errcount++;
continue;
}
if(xex_verbose)
fprintf(stderr, SELF ": reading from file %s\n", infile);
/* process every segment in current input file */
while(xex_fread_seg(&seg, in)) {
if(filecount++ == 1 && !seg.has_ff_header) {
fprintf(stderr, SELF ": warning: '%s' first segment "
"lacks $FFFF header (bad/partial XEX file?)\n",
infile);
}
/* normalize the $FFFF headers: only the first segment needs one */
seg.has_ff_header = (count == 1);
/* process -l option */
if(count == 1 && force_load > -1) {
if(xex_verbose)
fprintf(stderr,
SELF ": %s: setting first load address to %04X "
"due to -l option\n",
infile, force_load);
seg.start_addr = force_load;
seg.end_addr = force_load + seg.len - 1;
force_load = -1;
}
count++;
/* process -i option */
if(seg.start_addr == XEX_INITAD && seg.len == 2) {
if(force_init == 0) {
if(xex_verbose)
fprintf(stderr,
SELF ": %s: "
"skipping first init address segment due to -i0\n",
infile);
force_init = -1;
continue;
} else if(force_init > 0) {
if(xex_verbose)
fprintf(stderr,
SELF ": %s: "
"setting first init address to %04X due to -i option\n",
infile, force_init);
seg.object[0] = XEX_LSB(force_init);
seg.object[1] = XEX_MSB(force_init);
force_init = -1;
}
if(xex_verbose)
fprintf(stderr,
SELF ": %s: init address: %04X\n",
infile, XEX_ADDR(seg.object[0], seg.object[1]));
}
/* process -r option */
if(seg.start_addr == XEX_RUNAD && seg.len == 2) {
if(force_run > -1) {
if(xex_verbose)
fprintf(stderr,
SELF ": %s: "
"skipping run address segment due to -r option\n",
infile);
continue;
} else {
if(xex_verbose)
fprintf(stderr,
SELF ": %s: "
"run address: %04X\n",
infile, XEX_ADDR(seg.object[0], seg.object[1]));
}
}
/* write (possibly modified) segment to output */
if(!xex_fwrite_seg(&seg, out)) {
fprintf(stderr, SELF ": %s: %s\n",
outfile, xex_strerror(xex_errno));
xex_errno = 0;
errcount++;
break;
}
}
/* xex_errno will be 0 for XERR_NONE (meaning "no error") */
if(xex_errno) {
fprintf(stderr, SELF ": %s: %s\n",
infile, xex_strerror(xex_errno));
errcount++;
} else if(filecount == 1) {
fprintf(stderr, SELF ": warning: %s: file is empty.\n", infile);
}
if(xex_verbose)
fprintf(stderr, SELF ": done reading file %s\n", infile);
fclose(in);
}
/* if -r given, all run addresses in all files were omitted from the
output file. Here we add a single run address to the output. */
if(force_run > 0) {
xex_run_seg(&seg, buffer, force_run);
if(!xex_fwrite_seg(&seg, out)) {
fprintf(stderr, SELF ": %s: %s\n",
outfile, xex_strerror(xex_errno));
errcount++;
}
count++;
} else if(count == 1) {
fprintf(stderr, SELF ": warning: %s: file is empty.\n", outfile);
}
if(xex_verbose)
fprintf(stderr, SELF ": wrote %d segment%s to %s\n",
(count - 1),
(count == 2 ? "" : "s"),
outfile);
fclose(out);
if(xex_verbose || errcount) {
fprintf(stderr,
SELF ": %d error%s.\n", errcount, (errcount == 1 ? "" : "s"));
return errcount;
}
return 0;
}
|
