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Wireshark use pletohs to convert unsigned char to unsigned short,How to understand this code?

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0

I am reading the wireshark source code.but I can't understand this code:

typedef unsigned short guint16;
typedef unsigned char guint8;
#define pletohs(p) ((guint16) 
 ((guint16)*((const guint8 *)(p)+1)<<8| 
 (guint16)*((const guint8 *)(p)+0)<<0))
const guint8 *ptr;
pletohs(ptr); 

how pletohs works?

wireshark

share|improve this question

asked Mar 25 at 2:42

zbdbazbdba

11

add a comment | 

0

I am reading the wireshark source code.but I can't understand this code:

typedef unsigned short guint16;
typedef unsigned char guint8;
#define pletohs(p) ((guint16) 
 ((guint16)*((const guint8 *)(p)+1)<<8| 
 (guint16)*((const guint8 *)(p)+0)<<0))
const guint8 *ptr;
pletohs(ptr); 

how pletohs works?

wireshark

share|improve this question

asked Mar 25 at 2:42

zbdbazbdba

11

add a comment | 

I am reading the wireshark source code.but I can't understand this code:

typedef unsigned short guint16;
typedef unsigned char guint8;
#define pletohs(p) ((guint16) 
 ((guint16)*((const guint8 *)(p)+1)<<8| 
 (guint16)*((const guint8 *)(p)+0)<<0))
const guint8 *ptr;
pletohs(ptr); 

how pletohs works?

wireshark

share|improve this question

asked Mar 25 at 2:42

zbdbazbdba

11

typedef unsigned short guint16;
typedef unsigned char guint8;
#define pletohs(p) ((guint16) 
 ((guint16)*((const guint8 *)(p)+1)<<8| 
 (guint16)*((const guint8 *)(p)+0)<<0))
const guint8 *ptr;
pletohs(ptr); 

share|improve this question

asked Mar 25 at 2:42

zbdbazbdba

11

share|improve this question

asked Mar 25 at 2:42

zbdbazbdba

11

asked Mar 25 at 2:42

zbdbazbdba

11

asked Mar 25 at 2:42

zbdbazbdba

11