padLen = getPadLen(offset , defaultLen);
int getPadLen(int offsetLen, int defaultLen)
{
int vaildLen = min(packLen,defaultLen);
if(0 == vaildLen || 0 == offsetLen % vaildLen)
{
return 0;
}
return vaildLen - (offsetLen % vaildLen);
}
struct{
short a;
short b;
short c; }A; sizeof(A) = 6;
struct{
long a;
short c; }A; sizeof(A) = 8;
struct{
int a;
char b;
short c; }A;
sizeof(A) = 8;
a1 a2 a3 a4, b1 x c1 c2
struct{
char a;
int b;
short c; }A1;
sizeof(A1) = 12;
a1 x x x, b1 b2 b3 b4, c1 c2 x x
struct{
int a;
doubl b;
short c; }A; // sizeof(A) = 24 (vc6与gcc相同)
struct{
char a,b;
int c;
double d;
short e;
struct A h;
}B;
sizeof(B) = 48 //(vc6与gcc相同)
a1 a2 a3 a4 x x x x, b1 b2 b3 b4 b5 b6 b7 b7, c1 c2 x x x x x x
a1 b1 x x, c1 c2 c3 c4 , d1 d2 d3 d4 d5 d6 d7 d8, e1 e2 x x x x
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