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byteptr.h 12.25 KiB
// SONIC ROBO BLAST 2
//-----------------------------------------------------------------------------
// Copyright (C) 1998-2000 by DooM Legacy Team.
// Copyright (C) 1999-2021 by Sonic Team Junior.
//
// This program is free software distributed under the
// terms of the GNU General Public License, version 2.
// See the 'LICENSE' file for more details.
//-----------------------------------------------------------------------------
/// \file byteptr.h
/// \brief Macros to read/write from/to a UINT8 *,
/// used for packet creation and such
#if defined (__alpha__) || defined (__arm__) || defined (__mips__) || defined (__ia64__) || defined (__clang__)
#define DEALIGNED
#endif
#include "endian.h"
#ifndef SRB2_BIG_ENDIAN
//
// Little-endian machines
//
#ifdef DEALIGNED
#define WRITEUINT8(p,b) do { UINT8 *p_tmp = (void *)p; const UINT8 tv = ( UINT8)(b); memcpy(p, &tv, sizeof( UINT8)); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITESINT8(p,b) do { SINT8 *p_tmp = (void *)p; const SINT8 tv = ( UINT8)(b); memcpy(p, &tv, sizeof( UINT8)); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEINT16(p,b) do { INT16 *p_tmp = (void *)p; const INT16 tv = ( INT16)(b); memcpy(p, &tv, sizeof( INT16)); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEUINT16(p,b) do { UINT16 *p_tmp = (void *)p; const UINT16 tv = ( UINT16)(b); memcpy(p, &tv, sizeof( UINT16)); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEINT32(p,b) do { INT32 *p_tmp = (void *)p; const INT32 tv = ( INT32)(b); memcpy(p, &tv, sizeof( INT32)); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEUINT32(p,b) do { UINT32 *p_tmp = (void *)p; const UINT32 tv = ( UINT32)(b); memcpy(p, &tv, sizeof( UINT32)); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITECHAR(p,b) do { char *p_tmp = (void *)p; const char tv = ( char)(b); memcpy(p, &tv, sizeof( char)); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEFIXED(p,b) do { fixed_t *p_tmp = (void *)p; const fixed_t tv = (fixed_t)(b); memcpy(p, &tv, sizeof(fixed_t)); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEANGLE(p,b) do { angle_t *p_tmp = (void *)p; const angle_t tv = (angle_t)(b); memcpy(p, &tv, sizeof(angle_t)); p_tmp++; p = (void *)p_tmp; } while (0)
#else
#define WRITEUINT8(p,b) do { UINT8 *p_tmp = ( UINT8 *)p; *p_tmp = ( UINT8)(b); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITESINT8(p,b) do { SINT8 *p_tmp = ( SINT8 *)p; *p_tmp = ( SINT8)(b); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEINT16(p,b) do { INT16 *p_tmp = ( INT16 *)p; *p_tmp = ( INT16)(b); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEUINT16(p,b) do { UINT16 *p_tmp = ( UINT16 *)p; *p_tmp = ( UINT16)(b); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEINT32(p,b) do { INT32 *p_tmp = ( INT32 *)p; *p_tmp = ( INT32)(b); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEUINT32(p,b) do { UINT32 *p_tmp = ( UINT32 *)p; *p_tmp = ( UINT32)(b); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITECHAR(p,b) do { char *p_tmp = ( char *)p; *p_tmp = ( char)(b); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEFIXED(p,b) do { fixed_t *p_tmp = (fixed_t *)p; *p_tmp = (fixed_t)(b); p_tmp++; p = (void *)p_tmp; } while (0)
#define WRITEANGLE(p,b) do { angle_t *p_tmp = (angle_t *)p; *p_tmp = (angle_t)(b); p_tmp++; p = (void *)p_tmp; } while (0)
#endif
#ifdef __GNUC__
#ifdef DEALIGNED
#define READUINT8(p) ({ UINT8 *p_tmp = (void *)p; UINT8 b; memcpy(&b, p, sizeof( UINT8)); p_tmp++; p = (void *)p_tmp; b; })
#define READSINT8(p) ({ SINT8 *p_tmp = (void *)p; SINT8 b; memcpy(&b, p, sizeof( SINT8)); p_tmp++; p = (void *)p_tmp; b; })
#define READINT16(p) ({ INT16 *p_tmp = (void *)p; INT16 b; memcpy(&b, p, sizeof( INT16)); p_tmp++; p = (void *)p_tmp; b; })
#define READUINT16(p) ({ UINT16 *p_tmp = (void *)p; UINT16 b; memcpy(&b, p, sizeof( UINT16)); p_tmp++; p = (void *)p_tmp; b; })
#define READINT32(p) ({ INT32 *p_tmp = (void *)p; INT32 b; memcpy(&b, p, sizeof( INT32)); p_tmp++; p = (void *)p_tmp; b; })
#define READUINT32(p) ({ UINT32 *p_tmp = (void *)p; UINT32 b; memcpy(&b, p, sizeof( UINT32)); p_tmp++; p = (void *)p_tmp; b; })
#define READCHAR(p) ({ char *p_tmp = (void *)p; char b; memcpy(&b, p, sizeof( char)); p_tmp++; p = (void *)p_tmp; b; })
#define READFIXED(p) ({ fixed_t *p_tmp = (void *)p; fixed_t b; memcpy(&b, p, sizeof(fixed_t)); p_tmp++; p = (void *)p_tmp; b; })
#define READANGLE(p) ({ angle_t *p_tmp = (void *)p; angle_t b; memcpy(&b, p, sizeof(angle_t)); p_tmp++; p = (void *)p_tmp; b; })
#else
#define READUINT8(p) ({ UINT8 *p_tmp = ( UINT8 *)p; UINT8 b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })
#define READSINT8(p) ({ SINT8 *p_tmp = ( SINT8 *)p; SINT8 b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })
#define READINT16(p) ({ INT16 *p_tmp = ( INT16 *)p; INT16 b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })
#define READUINT16(p) ({ UINT16 *p_tmp = ( UINT16 *)p; UINT16 b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })
#define READINT32(p) ({ INT32 *p_tmp = ( INT32 *)p; INT32 b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })
#define READUINT32(p) ({ UINT32 *p_tmp = ( UINT32 *)p; UINT32 b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })
#define READCHAR(p) ({ char *p_tmp = ( char *)p; char b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })
#define READFIXED(p) ({ fixed_t *p_tmp = (fixed_t *)p; fixed_t b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })
#define READANGLE(p) ({ angle_t *p_tmp = (angle_t *)p; angle_t b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })
#endif
#else
#define READUINT8(p) *(( UINT8 *)p)++
#define READSINT8(p) *(( SINT8 *)p)++#define READINT16(p) *(( INT16 *)p)++
#define READUINT16(p) *(( UINT16 *)p)++
#define READINT32(p) *(( INT32 *)p)++
#define READUINT32(p) *(( UINT32 *)p)++
#define READCHAR(p) *(( char *)p)++
#define READFIXED(p) *((fixed_t *)p)++
#define READANGLE(p) *((angle_t *)p)++
#endif
#else //SRB2_BIG_ENDIAN
//
// definitions for big-endian machines with alignment constraints.
//
// Write a value to a little-endian, unaligned destination.
//
FUNCINLINE static ATTRINLINE void writeshort(void *ptr, INT32 val)
{
SINT8 *cp = ptr;
cp[0] = val; val >>= 8;
cp[1] = val;
}
FUNCINLINE static ATTRINLINE void writelong(void *ptr, INT32 val)
{
SINT8 *cp = ptr;
cp[0] = val; val >>= 8;
cp[1] = val; val >>= 8;
cp[2] = val; val >>= 8;
cp[3] = val;
}
#define WRITEUINT8(p,b) do { UINT8 *p_tmp = ( UINT8 *)p; *p_tmp = ( UINT8)(b) ; p_tmp++; p = (void *)p_tmp;} while (0)
#define WRITESINT8(p,b) do { SINT8 *p_tmp = ( SINT8 *)p; *p_tmp = ( SINT8)(b) ; p_tmp++; p = (void *)p_tmp;} while (0)
#define WRITEINT16(p,b) do { INT16 *p_tmp = ( INT16 *)p; writeshort (p, ( INT16)(b)); p_tmp++; p = (void *)p_tmp;} while (0)
#define WRITEUINT16(p,b) do { UINT16 *p_tmp = ( UINT16 *)p; writeshort (p, ( UINT16)(b)); p_tmp++; p = (void *)p_tmp;} while (0)
#define WRITEINT32(p,b) do { INT32 *p_tmp = ( INT32 *)p; writelong (p, ( INT32)(b)); p_tmp++; p = (void *)p_tmp;} while (0)
#define WRITEUINT32(p,b) do { UINT32 *p_tmp = ( UINT32 *)p; writelong (p, ( UINT32)(b)); p_tmp++; p = (void *)p_tmp;} while (0)
#define WRITECHAR(p,b) do { char *p_tmp = ( char *)p; *p_tmp = ( char)(b) ; p_tmp++; p = (void *)p_tmp;} while (0)
#define WRITEFIXED(p,b) do {fixed_t *p_tmp = (fixed_t *)p; writelong (p, (fixed_t)(b)); p_tmp++; p = (void *)p_tmp;} while (0)
#define WRITEANGLE(p,b) do {angle_t *p_tmp = (angle_t *)p; writelong (p, (angle_t)(b)); p_tmp++; p = (void *)p_tmp;} while (0)
// Read a signed quantity from little-endian, unaligned data.
//
FUNCINLINE static ATTRINLINE INT16 readshort(void *ptr)
{
SINT8 *cp = ptr;
UINT8 *ucp = ptr;
return (cp[1] << 8) | ucp[0];
}
FUNCINLINE static ATTRINLINE UINT16 readushort(void *ptr)
{
UINT8 *ucp = ptr;
return (ucp[1] << 8) | ucp[0];
}
FUNCINLINE static ATTRINLINE INT32 readlong(void *ptr)
{
SINT8 *cp = ptr;
UINT8 *ucp = ptr;
return (cp[3] << 24) | (ucp[2] << 16) | (ucp[1] << 8) | ucp[0];
}
FUNCINLINE static ATTRINLINE UINT32 readulong(void *ptr)
{
UINT8 *ucp = ptr;
return (ucp[3] << 24) | (ucp[2] << 16) | (ucp[1] << 8) | ucp[0];
}
#define READUINT8(p) ({ UINT8 *p_tmp = ( UINT8 *)p; UINT8 b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })#define READSINT8(p) ({ SINT8 *p_tmp = ( SINT8 *)p; SINT8 b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })
#define READINT16(p) ({ INT16 *p_tmp = ( INT16 *)p; INT16 b = readshort(p); p_tmp++; p = (void *)p_tmp; b; })
#define READUINT16(p) ({ UINT16 *p_tmp = ( UINT16 *)p; UINT16 b = readushort(p); p_tmp++; p = (void *)p_tmp; b; })
#define READINT32(p) ({ INT32 *p_tmp = ( INT32 *)p; INT32 b = readlong(p); p_tmp++; p = (void *)p_tmp; b; })
#define READUINT32(p) ({ UINT32 *p_tmp = ( UINT32 *)p; UINT32 b = readulong(p); p_tmp++; p = (void *)p_tmp; b; })
#define READCHAR(p) ({ char *p_tmp = ( char *)p; char b = *p_tmp; p_tmp++; p = (void *)p_tmp; b; })
#define READFIXED(p) ({ fixed_t *p_tmp = (fixed_t *)p; fixed_t b = readlong(p); p_tmp++; p = (void *)p_tmp; b; })
#define READANGLE(p) ({ angle_t *p_tmp = (angle_t *)p; angle_t b = readulong(p); p_tmp++; p = (void *)p_tmp; b; })
#endif //SRB2_BIG_ENDIAN
#undef DEALIGNED
#define WRITESTRINGN(p, s, n) ({ \
size_t tmp_i; \
\
for (tmp_i = 0; tmp_i < n && s[tmp_i] != '\0'; tmp_i++) \
WRITECHAR(p, s[tmp_i]); \
\
if (tmp_i < n) \
WRITECHAR(p, '\0'); \
})
#define WRITESTRINGL(p, s, n) ({ \
size_t tmp_i; \
\
for (tmp_i = 0; tmp_i < n - 1 && s[tmp_i] != '\0'; tmp_i++) \
WRITECHAR(p, s[tmp_i]); \
\
WRITECHAR(p, '\0'); \
})
#define WRITESTRING(p, s) ({ \
size_t tmp_i; \
\
for (tmp_i = 0; s[tmp_i] != '\0'; tmp_i++) \
WRITECHAR(p, s[tmp_i]); \
\
WRITECHAR(p, '\0'); \
})
#define WRITEMEM(p, s, n) ({ \
memcpy(p, s, n); \
p += n; \
})
#define SKIPSTRING(p) while (READCHAR(p) != '\0')
#define SKIPSTRINGN(p, n) ({ \
size_t tmp_i = 0; \
\
while (tmp_i < n && READCHAR(p) != '\0') \
tmp_i++; \
})
#define SKIPSTRINGL(p, n) SKIPSTRINGN(p, n)
#define READSTRINGN(p, s, n) ({ \
size_t tmp_i = 0; \
\
while (tmp_i < n && (s[tmp_i] = READCHAR(p)) != '\0') \
tmp_i++; \
\
s[tmp_i] = '\0'; \
})
#define READSTRINGL(p, s, n) ({ \
size_t tmp_i = 0; \
\
while (tmp_i < n - 1 && (s[tmp_i] = READCHAR(p)) != '\0') \
tmp_i++; \ \
s[tmp_i] = '\0'; \
})
#define READSTRING(p, s) ({ \
size_t tmp_i = 0; \
\
while ((s[tmp_i] = READCHAR(p)) != '\0') \
tmp_i++; \
\
s[tmp_i] = '\0'; \
})
#define READMEM(p, s, n) ({ \
memcpy(s, p, n); \
p += n; \
})