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Add portable little-endian file functions.

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svn path=/trunk/yasm/; revision=198
0.3
Peter Johnson 24 years ago
parent 1284d8d8af
commit 556602d2fa
5 changed files with 220 additions and 0 deletions
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  1. 56
      libyasm/file.c
  2. 53
      libyasm/file.h
  3. 2
      src/Makefile.am
  4. 56
      src/file.c
  5. 53
      src/file.h

56
libyasm/file.c
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@ -0,0 +1,56 @@
/* $IdPath$
* Little-endian file functions.
*
* Copyright (C) 2001 Peter Johnson
*
* This file is part of YASM.
*
* YASM 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 of the License, or
* (at your option) any later version.
*
* YASM 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "util.h"
#include <stdio.h>
#include "file.h"
RCSID("$IdPath$");
size_t
fwrite_short(unsigned short val, FILE *f)
{
if (fputc(val & 0xFF, f) == EOF)
return 0;
if (fputc((val >> 8) & 0xFF, f) == EOF)
return 0;
return 1;
}
size_t
fwrite_long(unsigned long val, FILE *f)
{
if (fputc(val & 0xFF, f) == EOF)
return 0;
if (fputc((val >> 8) & 0xFF, f) == EOF)
return 0;
if (fputc((val >> 16) & 0xFF, f) == EOF)
return 0;
if (fputc((val >> 24) & 0xFF, f) == EOF)
return 0;
return 1;
}

53
libyasm/file.h
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@ -0,0 +1,53 @@
/* $IdPath$
* Little-endian file functions header file.
*
* Copyright (C) 2001 Peter Johnson
*
* This file is part of YASM.
*
* YASM 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 of the License, or
* (at your option) any later version.
*
* YASM 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef YASM_FILE_H
#define YASM_FILE_H
/* These functions only work properly if p is an (unsigned char *) */
#define WRITE_BYTE(ptr, val) \
*((ptr)++) = (val) & 0xFF
#define WRITE_SHORT(ptr, val) \
do { \
*((ptr)++) = (val) & 0xFF; \
*((ptr)++) = ((val) >> 8) & 0xFF; \
} while (0)
#define WRITE_LONG(ptr, val) \
do { \
*((ptr)++) = (val) & 0xFF; \
*((ptr)++) = ((val) >> 8) & 0xFF; \
*((ptr)++) = ((val) >> 16) & 0xFF; \
*((ptr)++) = ((val) >> 24) & 0xFF; \
} while (0)
/* Direct-to-file versions of the above. Using the above macros and a single
* fwrite() will probably be faster than calling these functions many times.
* These functions return 1 if the write was successful, 0 if not (so their
* return values can be used like the return value from fwrite()).
*/
size_t fwrite_short(unsigned short val, FILE *f);
size_t fwrite_long(unsigned long val, FILE *f);
#endif

2
src/Makefile.am
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@ -30,6 +30,8 @@ libyasm_a_SOURCES = \
globals.c \
globals.h \
util.h \
file.c \
file.h \
section.c \
section.h \
objfmt.h \

56
src/file.c
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@ -0,0 +1,56 @@
/* $IdPath$
* Little-endian file functions.
*
* Copyright (C) 2001 Peter Johnson
*
* This file is part of YASM.
*
* YASM 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 of the License, or
* (at your option) any later version.
*
* YASM 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "util.h"
#include <stdio.h>
#include "file.h"
RCSID("$IdPath$");
size_t
fwrite_short(unsigned short val, FILE *f)
{
if (fputc(val & 0xFF, f) == EOF)
return 0;
if (fputc((val >> 8) & 0xFF, f) == EOF)
return 0;
return 1;
}
size_t
fwrite_long(unsigned long val, FILE *f)
{
if (fputc(val & 0xFF, f) == EOF)
return 0;
if (fputc((val >> 8) & 0xFF, f) == EOF)
return 0;
if (fputc((val >> 16) & 0xFF, f) == EOF)
return 0;
if (fputc((val >> 24) & 0xFF, f) == EOF)
return 0;
return 1;
}

53
src/file.h
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@ -0,0 +1,53 @@
/* $IdPath$
* Little-endian file functions header file.
*
* Copyright (C) 2001 Peter Johnson
*
* This file is part of YASM.
*
* YASM 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 of the License, or
* (at your option) any later version.
*
* YASM 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef YASM_FILE_H
#define YASM_FILE_H
/* These functions only work properly if p is an (unsigned char *) */
#define WRITE_BYTE(ptr, val) \
*((ptr)++) = (val) & 0xFF
#define WRITE_SHORT(ptr, val) \
do { \
*((ptr)++) = (val) & 0xFF; \
*((ptr)++) = ((val) >> 8) & 0xFF; \
} while (0)
#define WRITE_LONG(ptr, val) \
do { \
*((ptr)++) = (val) & 0xFF; \
*((ptr)++) = ((val) >> 8) & 0xFF; \
*((ptr)++) = ((val) >> 16) & 0xFF; \
*((ptr)++) = ((val) >> 24) & 0xFF; \
} while (0)
/* Direct-to-file versions of the above. Using the above macros and a single
* fwrite() will probably be faster than calling these functions many times.
* These functions return 1 if the write was successful, 0 if not (so their
* return values can be used like the return value from fwrite()).
*/
size_t fwrite_short(unsigned short val, FILE *f);
size_t fwrite_long(unsigned long val, FILE *f);
#endif
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