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Stepping toward generalised ReadNum.

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This commit is contained in:
David Brown 2016-09-30 17:19:26 +01:00
parent 6dedf34785
commit 3dc5049d5a
24 changed files with 156 additions and 32 deletions
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18
bootstrap/unix-44/Files.c
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@ -89,6 +89,7 @@ export void Files_ReadLInt (Files_Rider *R, address *R__typ, int32 *x);
export void Files_ReadLReal (Files_Rider *R, address *R__typ, LONGREAL *x);
export void Files_ReadLine (Files_Rider *R, address *R__typ, CHAR *x, LONGINT x__len);
export void Files_ReadNum (Files_Rider *R, address *R__typ, int32 *x);
export void Files_ReadNum64 (Files_Rider *R, address *R__typ, SYSTEM_BYTE *x, LONGINT x__len);
export void Files_ReadReal (Files_Rider *R, address *R__typ, REAL *x);
export void Files_ReadSet (Files_Rider *R, address *R__typ, uint32 *x);
export void Files_ReadString (Files_Rider *R, address *R__typ, CHAR *x, LONGINT x__len);
@ -914,6 +915,23 @@ void Files_ReadLine (Files_Rider *R, address *R__typ, CHAR *x, LONGINT x__len)
} while (!b);
}
void Files_ReadNum64 (Files_Rider *R, address *R__typ, SYSTEM_BYTE *x, LONGINT x__len)
{
int8 s, b;
int64 q;
s = 0;
q = 0;
Files_Read(&*R, R__typ, (void*)&b);
while ((int16)b >= 128) {
q += (int64)__ASH(((int16)b - 128), s);
s += 7;
Files_Read(&*R, R__typ, (void*)&b);
}
q += (int64)__ASH((__MASK(b, -64) - __ASHL(__ASHR(b, 6), 6)), s);
__ASSERT(x__len <= 8, 0);
__MOVE((address)&q, (address)x, x__len);
}
void Files_ReadNum (Files_Rider *R, address *R__typ, int32 *x)
{
int8 s;