/* Machine-independent I/O routines for gcov.
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/* Machine-independent I/O routines for gcov.
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Copyright (c) 2000 Red Hat, Inc. All rights reserved.
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Copyright (c) 2000 Red Hat, Inc. All rights reserved.
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This copyrighted material is made available to anyone wishing to use, modify,
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This copyrighted material is made available to anyone wishing to use, modify,
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copy, or redistribute it subject to the terms and conditions of the BSD
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copy, or redistribute it subject to the terms and conditions of the BSD
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License. This program is distributed in the hope that it will be useful,
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License. This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY expressed or implied, including the implied
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but WITHOUT ANY WARRANTY expressed or implied, including the implied
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warranties of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. A copy of
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warranties of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. A copy of
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this license is available at http://www.opensource.org/licenses. Any Red Hat
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this license is available at http://www.opensource.org/licenses. Any Red Hat
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trademarks that are incorporated in the source code or documentation are not
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trademarks that are incorporated in the source code or documentation are not
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subject to the BSD License and may only be used or replicated with the
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subject to the BSD License and may only be used or replicated with the
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express permission of Red Hat, Inc.
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express permission of Red Hat, Inc.
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*/
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*/
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#ifndef GCC_GCOV_IO_H
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#ifndef GCC_GCOV_IO_H
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#define GCC_GCOV_IO_H
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#define GCC_GCOV_IO_H
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#include <stdio.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/types.h>
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static int __fetch_long (long *, char *, size_t);
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static int __fetch_long (long *, char *, size_t);
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static int __store_long (long, char *, size_t);
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static int __store_long (long, char *, size_t);
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static int __read_long (long *, FILE *, size_t);
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static int __read_long (long *, FILE *, size_t);
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static int __write_long (long, FILE *, size_t);
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static int __write_long (long, FILE *, size_t);
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/* These routines only work for signed values. */
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/* These routines only work for signed values. */
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/* Store a portable representation of VALUE in DEST using BYTES*8-1 bits.
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/* Store a portable representation of VALUE in DEST using BYTES*8-1 bits.
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Return a non-zero value if VALUE requires more than BYTES*8-1 bits
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Return a non-zero value if VALUE requires more than BYTES*8-1 bits
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to store. */
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to store. */
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static int
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static int
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__store_long (value, dest, bytes)
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__store_long (value, dest, bytes)
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long value;
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long value;
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char *dest;
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char *dest;
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size_t bytes;
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size_t bytes;
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{
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{
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int upper_bit = (value < 0 ? 128 : 0);
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int upper_bit = (value < 0 ? 128 : 0);
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size_t i;
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size_t i;
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if (value < 0)
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if (value < 0)
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{
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{
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long oldvalue = value;
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long oldvalue = value;
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value = -value;
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value = -value;
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if (oldvalue != -value)
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if (oldvalue != -value)
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return 1;
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return 1;
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}
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}
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for(i = 0 ; i < (sizeof (value) < bytes ? sizeof (value) : bytes) ; i++) {
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for(i = 0 ; i < (sizeof (value) < bytes ? sizeof (value) : bytes) ; i++) {
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dest[i] = value & (i == (bytes - 1) ? 127 : 255);
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dest[i] = value & (i == (bytes - 1) ? 127 : 255);
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value = value / 256;
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value = value / 256;
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}
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}
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if (value && value != -1)
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if (value && value != -1)
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return 1;
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return 1;
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for(; i < bytes ; i++)
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for(; i < bytes ; i++)
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dest[i] = 0;
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dest[i] = 0;
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dest[bytes - 1] |= upper_bit;
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dest[bytes - 1] |= upper_bit;
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return 0;
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return 0;
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}
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}
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/* Retrieve a quantity containing BYTES*8-1 bits from SOURCE and store
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/* Retrieve a quantity containing BYTES*8-1 bits from SOURCE and store
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the result in DEST. Returns a non-zero value if the value in SOURCE
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the result in DEST. Returns a non-zero value if the value in SOURCE
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will not fit in DEST. */
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will not fit in DEST. */
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static int
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static int
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__fetch_long (dest, source, bytes)
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__fetch_long (dest, source, bytes)
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long *dest;
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long *dest;
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char *source;
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char *source;
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size_t bytes;
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size_t bytes;
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{
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{
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long value = 0;
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long value = 0;
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int i;
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int i;
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for (i = bytes - 1; (size_t) i > (sizeof (*dest) - 1); i--)
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for (i = bytes - 1; (size_t) i > (sizeof (*dest) - 1); i--)
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if (source[i] & ((size_t) i == (bytes - 1) ? 127 : 255 ))
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if (source[i] & ((size_t) i == (bytes - 1) ? 127 : 255 ))
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return 1;
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return 1;
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for (; i >= 0; i--)
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for (; i >= 0; i--)
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value = value * 256 + (source[i] & ((size_t)i == (bytes - 1) ? 127 : 255));
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value = value * 256 + (source[i] & ((size_t)i == (bytes - 1) ? 127 : 255));
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if ((source[bytes - 1] & 128) && (value > 0))
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if ((source[bytes - 1] & 128) && (value > 0))
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value = - value;
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value = - value;
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*dest = value;
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*dest = value;
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return 0;
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return 0;
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}
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}
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/* Write a BYTES*8-bit quantity to FILE, portably. Returns a non-zero
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/* Write a BYTES*8-bit quantity to FILE, portably. Returns a non-zero
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value if the write fails, or if VALUE can't be stored in BYTES*8
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value if the write fails, or if VALUE can't be stored in BYTES*8
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bits.
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bits.
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Note that VALUE may not actually be large enough to hold BYTES*8
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Note that VALUE may not actually be large enough to hold BYTES*8
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bits, but BYTES characters will be written anyway.
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bits, but BYTES characters will be written anyway.
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BYTES may be a maximum of 10. */
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BYTES may be a maximum of 10. */
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static int
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static int
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__write_long (value, file, bytes)
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__write_long (value, file, bytes)
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long value;
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long value;
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FILE *file;
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FILE *file;
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size_t bytes;
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size_t bytes;
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{
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{
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char c[10];
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char c[10];
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if (bytes > 10 || __store_long (value, c, bytes))
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if (bytes > 10 || __store_long (value, c, bytes))
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return 1;
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return 1;
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else
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else
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return fwrite(c, 1, bytes, file) != bytes;
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return fwrite(c, 1, bytes, file) != bytes;
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}
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}
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/* Read a quantity containing BYTES bytes from FILE, portably. Return
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/* Read a quantity containing BYTES bytes from FILE, portably. Return
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a non-zero value if the read fails or if the value will not fit
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a non-zero value if the read fails or if the value will not fit
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in DEST.
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in DEST.
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Note that DEST may not be large enough to hold all of the requested
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Note that DEST may not be large enough to hold all of the requested
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data, but the function will read BYTES characters anyway.
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data, but the function will read BYTES characters anyway.
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BYTES may be a maximum of 10. */
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BYTES may be a maximum of 10. */
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static int
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static int
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__read_long (dest, file, bytes)
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__read_long (dest, file, bytes)
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long *dest;
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long *dest;
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FILE *file;
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FILE *file;
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size_t bytes;
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size_t bytes;
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{
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{
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char c[10];
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char c[10];
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if (bytes > 10 || fread(c, 1, bytes, file) != bytes)
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if (bytes > 10 || fread(c, 1, bytes, file) != bytes)
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return 1;
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return 1;
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else
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else
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return __fetch_long (dest, c, bytes);
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return __fetch_long (dest, c, bytes);
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}
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}
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#endif /* ! GCC_GCOV_IO_H */
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#endif /* ! GCC_GCOV_IO_H */
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