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
|
/*
casm - Simple, portable assembler
Copyright (C) 2003-2015 Ian Cowburn (ianc@noddybox.demon.co.uk)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
-------------------------------------------------------------------------
Spectrum TAP file output handler.
*/
#include <stdlib.h>
#include <stdio.h>
#include "global.h"
#include "specout.h"
/* ---------------------------------------- PRIVATE FUNCTIONS
*/
static Byte TapByte(FILE *fp, Byte b, Byte chk)
{
chk ^= b;
putc(b, fp);
return chk;
}
static Byte TapWord(FILE *fp, int w, Byte chk)
{
chk = TapByte(fp, w & 0xff, chk);
chk = TapByte(fp, (w & 0xff00) >> 8, chk);
return chk;
}
static Byte TapString(FILE *fp, const char *p, int len, Byte chk)
{
while(len--)
{
chk = TapByte(fp, *p ? *p++ : ' ', chk);
}
return chk;
}
/* ---------------------------------------- INTERFACES
*/
const ValueTable *SpecTAPOutputOptions(void)
{
return NULL;
}
CommandStatus SpecTAPOutputSetOption(int opt, int argc, char *argv[],
int quoted[],
char *error, size_t error_size)
{
return CMD_NOT_KNOWN;
}
int SpecTAPOutput(const char *filename, const char *filename_bank,
MemoryBank **bank, int count, char *error, size_t error_size)
{
FILE *fp = fopen(filename, "wb");
int f;
if (!fp)
{
snprintf(error, error_size, "Failed to create %s", filename);
return FALSE;
}
for(f = 0; f < count; f++)
{
Byte chk = 0;
const Byte *mem;
int min, max, len;
mem = bank[f]->memory;
min = bank[f]->min_address_used;
max = bank[f]->max_address_used;
len = max - min + 1;
TapWord(fp, 19, 0);
chk = TapByte(fp, 0, chk);
chk = TapByte(fp, 3, chk);
if (count == 1)
{
chk = TapString(fp, filename, 10, chk);
}
else
{
char fn[16];
snprintf(fn, sizeof fn, filename_bank, bank[f]->number);
chk = TapString(fp, fn, 10, chk);
}
chk = TapWord(fp, len, chk);
chk = TapWord(fp, min, chk);
chk = TapWord(fp, 32768, chk);
TapByte(fp, chk, 0);
/* Output file data
*/
TapWord(fp, len + 2, 0);
chk = 0;
chk = TapByte(fp, 0xff, chk);
while(min <= max)
{
chk = TapByte(fp, mem[min], chk);
min++;
}
TapByte(fp, chk, 0);
}
fclose(fp);
return TRUE;
}
/*
vim: ai sw=4 ts=8 expandtab
*/
|
