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- /* int_arb.c: Functions to read/write arbitrary-size integers
- Copyright (C) 2003 Sebastian Reichelt
- This program 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.
- This program 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. */
- #include "integers.h"
- // See integers.h for a description of these functions.
- IMAX ReadTI (const void *Data, SIZE Size)
- {
- #ifdef TARGET_BIG_ENDIAN
- #define DEFINE_INT_SIZE(TempSize) \
- if (Size >= TempSize) \
- return (ReadTI##TempSize (*((const TI##TempSize *) (((const I1 *) Data) + Size - TempSize)))); \
- else
- #else /* !TARGET_BIG_ENDIAN */
- #define DEFINE_INT_SIZE(TempSize) \
- if (Size >= TempSize) \
- return (ReadTI##TempSize (*((const TI##TempSize *) Data))); \
- else
- #endif /* !TARGET_BIG_ENDIAN */
-
- #include "int_def.inc"
- return 0;
-
- #undef DEFINE_INT_SIZE
- }
- SIMAX ReadSTI (const void *Data, SIZE Size)
- {
- #ifdef TARGET_BIG_ENDIAN
- #define DEFINE_INT_SIZE(TempSize) \
- if (Size >= TempSize) \
- return ((SI##TempSize) (ReadTI##TempSize (*((const TI##TempSize *) (((const I1 *) Data) + Size - TempSize))))); \
- else
- #else /* !TARGET_BIG_ENDIAN */
- #define DEFINE_INT_SIZE(TempSize) \
- if (Size >= TempSize) \
- return ((SI##TempSize) (ReadTI##TempSize (*((const TI##TempSize *) Data)))); \
- else
- #endif /* !TARGET_BIG_ENDIAN */
-
- #include "int_def.inc"
- return 0;
- #undef DEFINE_INT_SIZE
- }
- BOOLEAN WriteTI (void *Data, SIZE Size, SIMAX Value, BOOLEAN AllowSigned, BOOLEAN AllowUnsigned)
- {
- #ifdef TARGET_BIG_ENDIAN
- #define DEFINE_INT_SIZE(TempSize) \
- if (Size >= TempSize) \
- { \
- if ((AllowSigned && (Value == ((SI##TempSize) Value))) || (AllowUnsigned && (((IMAX) Value) == ((I##TempSize) Value)))) \
- { \
- WriteTI##TempSize (*((TI##TempSize *) (((I1 *) Data) + Size - TempSize)), Value); \
- return TRUE; \
- } \
- } \
- else
- #else /* !TARGET_BIG_ENDIAN */
- #define DEFINE_INT_SIZE(TempSize) \
- if (Size >= TempSize) \
- { \
- if ((AllowSigned && (Value == ((SI##TempSize) Value))) || (AllowUnsigned && (((IMAX) Value) == ((I##TempSize) Value)))) \
- { \
- WriteTI##TempSize (*((TI##TempSize *) Data), Value); \
- return TRUE; \
- } \
- } \
- else
- #endif /* !TARGET_BIG_ENDIAN */
-
- #include "int_def.inc"
- return FALSE;
- return FALSE;
-
- #undef DEFINE_INT_SIZE
- }
- BOOLEAN AddTI (void *Data, SIZE Size, SIMAX Value, BOOLEAN AllowSigned, BOOLEAN AllowUnsigned)
- {
- return WriteTI (Data, Size, Value + ReadSTI (Data, Size), AllowSigned, AllowUnsigned);
- }
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