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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305
|
/* 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. */
/* As a special exception, if you link this library with other files,
some of which are compiled with GCC, to produce an executable,
this library does not by itself cause the resulting executable
to be covered by the GNU General Public License.
This exception does not however invalidate any other reasons why
the executable file might be covered by the GNU General Public
License. */
#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;
static int __write_gcov_string PARAMS ((const char *, size_t, FILE*, long))
ATTRIBUTE_UNUSED;
static int __read_gcov_string PARAMS ((char *, size_t, FILE*, long))
ATTRIBUTE_UNUSED;
/* These routines only work for signed values. */
/* Store a portable representation of VALUE in DEST using BYTES*8-1 bits.
Return a nonzero 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 nonzero 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 nonzero
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 nonzero 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);
}
/* Writes string in gcov format. */
static int
__write_gcov_string (string, length, file, delim)
const char *string;
size_t length;
FILE *file;
long delim;
{
size_t temp = length + 1;
/* delimiter */
if (__write_long (delim, file, 4) != 0)
return 1;
if (__write_long (length, file, 4) != 0)
return 1;
if (fwrite (string, temp, 1, file) != 1)
return 1;
temp &= 3;
if (temp)
{
char c[4];
c[0] = c[1] = c[2] = c[3] = 0;
if (fwrite (c, sizeof (char), 4 - temp, file) != 4 - temp)
return 1;
}
if (__write_long (delim, file, 4) != 0)
return 1;
return 0;
}
/* Reads string in gcov format. */
static int
__read_gcov_string (string, max_length, file, delim)
char *string;
size_t max_length;
FILE *file;
long delim;
{
long delim_from_file;
long length;
long read_length;
long tmp;
if (__read_long (&delim_from_file, file, 4) != 0)
return 1;
if (delim_from_file != delim)
return 1;
if (__read_long (&length, file, 4) != 0)
return 1;
if (length > (long) max_length)
read_length = max_length;
else
read_length = length;
tmp = (((length + 1) - 1) / 4 + 1) * 4;
/* This is the size occupied by the string in the file */
if (fread (string, read_length, 1, file) != 1)
return 1;
string[read_length] = 0;
if (fseek (file, tmp - read_length, SEEK_CUR) < 0)
return 1;
if (__read_long (&delim_from_file, file, 4) != 0)
return 1;
if (delim_from_file != delim)
return 1;
return 0;
}
#endif /* ! GCC_GCOV_IO_H */
|