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
|
// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
plaparse.h
Parser for Berkeley standard PLA files into raw fusemaps.
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "jedparse.h"
#include "plaparse.h"
/***************************************************************************
DEBUGGING
***************************************************************************/
#define LOG_PARSE 0
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
struct parse_info
{
UINT32 inputs;
UINT32 outputs;
UINT32 terms;
};
/***************************************************************************
UTILITIES
***************************************************************************/
/*-------------------------------------------------
iscrlf - is a line feed character
-------------------------------------------------*/
static int iscrlf(char c)
{
return (c == 13 || c == 10);
}
/*-------------------------------------------------
suck_number - read a decimal value from the
character stream
-------------------------------------------------*/
static UINT32 suck_number(const UINT8 **psrc)
{
const UINT8 *src = *psrc;
UINT32 value = 0;
// loop over and accumulate digits
while (isdigit(*src))
{
value = value * 10 + *src - '0';
src++;
}
// return a pointer to the string afterwards
*psrc = src;
return value;
}
/***************************************************************************
CORE IMPLEMENTATION
***************************************************************************/
/*-------------------------------------------------
process_field - process a single field
-------------------------------------------------*/
static void process_field(jed_data *data, const UINT8 *cursrc, const UINT8 *srcend, parse_info *pinfo)
{
cursrc++;
// switch off of the field type
switch (*cursrc)
{
// number of inputs
case 'i':
cursrc += 2;
pinfo->inputs = suck_number(&cursrc);
if (LOG_PARSE) printf("Inputs: %u\n", pinfo->inputs);
break;
// number of outputs
case 'o':
cursrc += 2;
pinfo->outputs = suck_number(&cursrc);
if (LOG_PARSE) printf("Outputs: %u\n", pinfo->outputs);
break;
// number of product terms
case 'p':
{
cursrc += 2;
pinfo->terms = suck_number(&cursrc);
if (LOG_PARSE) printf("Terms: %u\n", pinfo->terms);
UINT32 curfuse = 0;
bool outputs = false;
cursrc++;
while (cursrc < srcend && *cursrc != '.')
{
switch (*cursrc)
{
case '-':
if (!outputs)
{
jed_set_fuse(data, curfuse++, 1);
jed_set_fuse(data, curfuse++, 1);
if (LOG_PARSE) printf("11");
}
break;
case '1':
if (outputs)
{
jed_set_fuse(data, curfuse++, 0);
if (LOG_PARSE) printf("0");
}
else
{
jed_set_fuse(data, curfuse++, 1);
jed_set_fuse(data, curfuse++, 0);
if (LOG_PARSE) printf("10");
}
break;
case '0':
if (outputs)
{
jed_set_fuse(data, curfuse++, 1);
if (LOG_PARSE) printf("1");
}
else
{
jed_set_fuse(data, curfuse++, 0);
jed_set_fuse(data, curfuse++, 1);
if (LOG_PARSE) printf("01");
}
break;
case ' ':
outputs = true;
if (LOG_PARSE) printf(" ");
break;
}
if (iscrlf(*cursrc) && outputs)
{
outputs = false;
if (LOG_PARSE) printf("\n");
}
cursrc++;
}
data->numfuses = curfuse;
break;
}
// end of file
case 'e':
printf("End of file\n");
break;
}
cursrc++;
}
/*-------------------------------------------------
pla_parse - parse a Berkeley standard PLA file
that has been loaded raw into memory
-------------------------------------------------*/
int pla_parse(const void *data, size_t length, jed_data *result)
{
const UINT8 *cursrc = (const UINT8 *)data;
const UINT8 *srcend = cursrc + length;
const UINT8 *scan;
parse_info pinfo;
result->numfuses = 0;
memset(result->fusemap, 0x00, sizeof(result->fusemap));
while (cursrc < srcend)
{
if (*cursrc == '#')
{
cursrc++;
while (cursrc < srcend && !iscrlf(*cursrc))
cursrc++;
}
else if (*cursrc == '.')
{
scan = cursrc;
while (scan < srcend && !iscrlf(*scan))
scan++;
if (scan >= srcend)
return JEDERR_INVALID_DATA;
process_field(result, cursrc, srcend, &pinfo);
cursrc = scan + 1;
}
cursrc++;
}
return JEDERR_NONE;
}
|