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Diffstat (limited to 'src/pint.h')
| -rw-r--r-- | src/pint.h | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/src/pint.h b/src/pint.h new file mode 100644 index 0000000..11ff8c9 --- /dev/null +++ b/src/pint.h @@ -0,0 +1,213 @@ +/* pint.h + * Definitions for extracting and translating integers safely and portably + * via pointers. + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <[email protected]> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef __PINT_H__ +#define __PINT_H__ + +#include <glib.h> + +/* Routines that take a possibly-unaligned pointer to a 16-bit, 24-bit, + * 32-bit, 40-bit, ... 64-bit integral quantity, in a particular byte + * order, and fetch the value and return it in host byte order. + * + * The pntohN() routines fetch big-endian values; the pletohN() routines + * fetch little-endian values. + */ + +static inline guint16 pntoh16(const void *p) +{ + return (guint16)*((const guint8 *)(p)+0)<<8| + (guint16)*((const guint8 *)(p)+1)<<0; +} + +static inline guint32 pntoh24(const void *p) +{ + return (guint32)*((const guint8 *)(p)+0)<<16| + (guint32)*((const guint8 *)(p)+1)<<8| + (guint32)*((const guint8 *)(p)+2)<<0; +} + +static inline guint32 pntoh32(const void *p) +{ + return (guint32)*((const guint8 *)(p)+0)<<24| + (guint32)*((const guint8 *)(p)+1)<<16| + (guint32)*((const guint8 *)(p)+2)<<8| + (guint32)*((const guint8 *)(p)+3)<<0; +} + +static inline guint64 pntoh40(const void *p) +{ + return (guint64)*((const guint8 *)(p)+0)<<32| + (guint64)*((const guint8 *)(p)+1)<<24| + (guint64)*((const guint8 *)(p)+2)<<16| + (guint64)*((const guint8 *)(p)+3)<<8| + (guint64)*((const guint8 *)(p)+4)<<0; +} + +static inline guint64 pntoh48(const void *p) +{ + return (guint64)*((const guint8 *)(p)+0)<<40| + (guint64)*((const guint8 *)(p)+1)<<32| + (guint64)*((const guint8 *)(p)+2)<<24| + (guint64)*((const guint8 *)(p)+3)<<16| + (guint64)*((const guint8 *)(p)+4)<<8| + (guint64)*((const guint8 *)(p)+5)<<0; +} + +static inline guint64 pntoh56(const void *p) +{ + return (guint64)*((const guint8 *)(p)+0)<<48| + (guint64)*((const guint8 *)(p)+1)<<40| + (guint64)*((const guint8 *)(p)+2)<<32| + (guint64)*((const guint8 *)(p)+3)<<24| + (guint64)*((const guint8 *)(p)+4)<<16| + (guint64)*((const guint8 *)(p)+5)<<8| + (guint64)*((const guint8 *)(p)+6)<<0; +} + +static inline guint64 pntoh64(const void *p) +{ + return (guint64)*((const guint8 *)(p)+0)<<56| + (guint64)*((const guint8 *)(p)+1)<<48| + (guint64)*((const guint8 *)(p)+2)<<40| + (guint64)*((const guint8 *)(p)+3)<<32| + (guint64)*((const guint8 *)(p)+4)<<24| + (guint64)*((const guint8 *)(p)+5)<<16| + (guint64)*((const guint8 *)(p)+6)<<8| + (guint64)*((const guint8 *)(p)+7)<<0; +} + +static inline guint16 pletoh16(const void *p) +{ + return (guint16)*((const guint8 *)(p)+1)<<8| + (guint16)*((const guint8 *)(p)+0)<<0; +} + +static inline guint32 pletoh24(const void *p) +{ + return (guint32)*((const guint8 *)(p)+2)<<16| + (guint32)*((const guint8 *)(p)+1)<<8| + (guint32)*((const guint8 *)(p)+0)<<0; +} + +static inline guint32 pletoh32(const void *p) +{ + return (guint32)*((const guint8 *)(p)+3)<<24| + (guint32)*((const guint8 *)(p)+2)<<16| + (guint32)*((const guint8 *)(p)+1)<<8| + (guint32)*((const guint8 *)(p)+0)<<0; +} + +static inline guint64 pletoh40(const void *p) +{ + return (guint64)*((const guint8 *)(p)+4)<<32| + (guint64)*((const guint8 *)(p)+3)<<24| + (guint64)*((const guint8 *)(p)+2)<<16| + (guint64)*((const guint8 *)(p)+1)<<8| + (guint64)*((const guint8 *)(p)+0)<<0; +} + +static inline guint64 pletoh48(const void *p) +{ + return (guint64)*((const guint8 *)(p)+5)<<40| + (guint64)*((const guint8 *)(p)+4)<<32| + (guint64)*((const guint8 *)(p)+3)<<24| + (guint64)*((const guint8 *)(p)+2)<<16| + (guint64)*((const guint8 *)(p)+1)<<8| + (guint64)*((const guint8 *)(p)+0)<<0; +} + +static inline guint64 pletoh56(const void *p) +{ + return (guint64)*((const guint8 *)(p)+6)<<48| + (guint64)*((const guint8 *)(p)+5)<<40| + (guint64)*((const guint8 *)(p)+4)<<32| + (guint64)*((const guint8 *)(p)+3)<<24| + (guint64)*((const guint8 *)(p)+2)<<16| + (guint64)*((const guint8 *)(p)+1)<<8| + (guint64)*((const guint8 *)(p)+0)<<0; +} + +static inline guint64 pletoh64(const void *p) +{ + return (guint64)*((const guint8 *)(p)+7)<<56| + (guint64)*((const guint8 *)(p)+6)<<48| + (guint64)*((const guint8 *)(p)+5)<<40| + (guint64)*((const guint8 *)(p)+4)<<32| + (guint64)*((const guint8 *)(p)+3)<<24| + (guint64)*((const guint8 *)(p)+2)<<16| + (guint64)*((const guint8 *)(p)+1)<<8| + (guint64)*((const guint8 *)(p)+0)<<0; +} +/* Pointer routines to put items out in a particular byte order. + * These will work regardless of the byte alignment of the pointer. + */ + +static inline void phton16(guint8 *p, guint16 v) +{ + p[0] = (guint8)(v >> 8); + p[1] = (guint8)(v >> 0); +} + +static inline void phton32(guint8 *p, guint32 v) +{ + p[0] = (guint8)(v >> 24); + p[1] = (guint8)(v >> 16); + p[2] = (guint8)(v >> 8); + p[3] = (guint8)(v >> 0); +} + +static inline void phton64(guint8 *p, guint64 v) { + p[0] = (guint8)(v >> 56); + p[1] = (guint8)(v >> 48); + p[2] = (guint8)(v >> 40); + p[3] = (guint8)(v >> 32); + p[4] = (guint8)(v >> 24); + p[5] = (guint8)(v >> 16); + p[6] = (guint8)(v >> 8); + p[7] = (guint8)(v >> 0); +} + +static inline void phtole32(guint8 *p, guint32 v) { + p[0] = (guint8)(v >> 0); + p[1] = (guint8)(v >> 8); + p[2] = (guint8)(v >> 16); + p[3] = (guint8)(v >> 24); +} + +static inline void phtole64(guint8 *p, guint64 v) { + p[0] = (guint8)(v >> 0); + p[1] = (guint8)(v >> 8); + p[2] = (guint8)(v >> 16); + p[3] = (guint8)(v >> 24); + p[4] = (guint8)(v >> 32); + p[5] = (guint8)(v >> 40); + p[6] = (guint8)(v >> 48); + p[7] = (guint8)(v >> 56); +} + +/* Subtract two guint32s with respect to wraparound */ +#define guint32_wraparound_diff(higher, lower) ((higher>lower)?(higher-lower):(higher+0xffffffff-lower+1)) + +#endif /* PINT_H */ + +/* + * Editor modelines - https://www.wireshark.org/tools/modelines.html + * + * Local Variables: + * c-basic-offset: 4 + * tab-width: 8 + * indent-tabs-mode: nil + * End: + * + * ex: set shiftwidth=4 tabstop=8 expandtab: + * :indentSize=4:tabSize=8:noTabs=true: + */ |