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
|
/* Machine-independent I/O routines for gcov.
Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
Contributed by Bob Manson <manson@cygnus.com>.
This file is part of GCC.
GCC 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 2, or (at your option) any later
version.
GCC 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 GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#ifndef GCC_GCOV_IO_H
#define GCC_GCOV_IO_H
#include <stdio.h>
#include <sys/types.h>
static int __fetch_long PARAMS ((long *, char *, size_t)) ATTRIBUTE_UNUSED;
static int __read_long PARAMS ((long *, FILE *, size_t)) ATTRIBUTE_UNUSED;
static int __write_long PARAMS ((long, FILE *, size_t)) ATTRIBUTE_UNUSED;
static int __fetch_gcov_type PARAMS ((gcov_type *, char *, size_t)) ATTRIBUTE_UNUSED;
static int __store_gcov_type PARAMS ((gcov_type, char *, size_t)) ATTRIBUTE_UNUSED;
static int __read_gcov_type PARAMS ((gcov_type *, FILE *, size_t)) ATTRIBUTE_UNUSED;
static int __write_gcov_type PARAMS ((gcov_type, FILE *, size_t)) ATTRIBUTE_UNUSED;
/* These routines only work for signed values. */
/* Store a portable representation of VALUE in DEST using BYTES*8-1 bits.
Return a non-zero value if VALUE requires more than BYTES*8-1 bits
to store. */
static int
__store_gcov_type (value, dest, bytes)
gcov_type value;
char *dest;
size_t bytes;
{
int upper_bit = (value < 0 ? 128 : 0);
size_t i;
if (value < 0)
{
gcov_type oldvalue = value;
value = -value;
if (oldvalue != -value)
return 1;
}
for(i = 0 ; i < (sizeof (value) < bytes ? sizeof (value) : bytes) ; i++) {
dest[i] = value & (i == (bytes - 1) ? 127 : 255);
value = value / 256;
}
if (value && value != -1)
return 1;
for(; i < bytes ; i++)
dest[i] = 0;
dest[bytes - 1] |= upper_bit;
return 0;
}
/* Retrieve a quantity containing BYTES*8-1 bits from SOURCE and store
the result in DEST. Returns a non-zero value if the value in SOURCE
will not fit in DEST. */
static int
__fetch_gcov_type (dest, source, bytes)
gcov_type *dest;
char *source;
size_t bytes;
{
gcov_type value = 0;
int i;
for (i = bytes - 1; (size_t) i > (sizeof (*dest) - 1); i--)
if (source[i] & ((size_t) i == (bytes - 1) ? 127 : 255 ))
return 1;
for (; i >= 0; i--)
value = value * 256 + (source[i] & ((size_t)i == (bytes - 1) ? 127 : 255));
if ((source[bytes - 1] & 128) && (value > 0))
value = - value;
*dest = value;
return 0;
}
static int
__fetch_long (dest, source, bytes)
long *dest;
char *source;
size_t bytes;
{
long value = 0;
int i;
for (i = bytes - 1; (size_t) i > (sizeof (*dest) - 1); i--)
if (source[i] & ((size_t) i == (bytes - 1) ? 127 : 255 ))
return 1;
for (; i >= 0; i--)
value = value * 256 + (source[i] & ((size_t)i == (bytes - 1) ? 127 : 255));
if ((source[bytes - 1] & 128) && (value > 0))
value = - value;
*dest = value;
return 0;
}
/* Write a BYTES*8-bit quantity to FILE, portably. Returns a non-zero
value if the write fails, or if VALUE can't be stored in BYTES*8
bits.
Note that VALUE may not actually be large enough to hold BYTES*8
bits, but BYTES characters will be written anyway.
BYTES may be a maximum of 10. */
static int
__write_gcov_type (value, file, bytes)
gcov_type value;
FILE *file;
size_t bytes;
{
char c[10];
if (bytes > 10 || __store_gcov_type (value, c, bytes))
return 1;
else
return fwrite(c, 1, bytes, file) != bytes;
}
static int
__write_long (value, file, bytes)
long value;
FILE *file;
size_t bytes;
{
char c[10];
if (bytes > 10 || __store_gcov_type ((gcov_type)value, c, bytes))
return 1;
else
return fwrite(c, 1, bytes, file) != bytes;
}
/* Read a quantity containing BYTES bytes from FILE, portably. Return
a non-zero value if the read fails or if the value will not fit
in DEST.
Note that DEST may not be large enough to hold all of the requested
data, but the function will read BYTES characters anyway.
BYTES may be a maximum of 10. */
static int
__read_gcov_type (dest, file, bytes)
gcov_type *dest;
FILE *file;
size_t bytes;
{
char c[10];
if (bytes > 10 || fread(c, 1, bytes, file) != bytes)
return 1;
else
return __fetch_gcov_type (dest, c, bytes);
}
static int
__read_long (dest, file, bytes)
long *dest;
FILE *file;
size_t bytes;
{
char c[10];
if (bytes > 10 || fread(c, 1, bytes, file) != bytes)
return 1;
else
return __fetch_long (dest, c, bytes);
}
#endif /* ! GCC_GCOV_IO_H */
|
