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GeneralRe: I need socket help UDP broadcast, sendbuf Pin
Albert Holguin20-Oct-11 11:31
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GeneralRe: I need socket help UDP broadcast, sendbuf Pin
jkirkerx20-Oct-11 12:39
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GeneralRe: I need socket help UDP broadcast, sendbuf Pin
jkirkerx20-Oct-11 12:46
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GeneralRe: I need socket help UDP broadcast, sendbuf Pin
Albert Holguin21-Oct-11 4:51
professionalAlbert Holguin21-Oct-11 4:51 
GeneralRe: I need socket help UDP broadcast, sendbuf Pin
jkirkerx21-Oct-11 6:52
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AnswerYou have to use the memset Pin
jkirkerx20-Oct-11 11:05
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AnswerRe: You have to use the memset Pin
Albert Holguin20-Oct-11 11:35
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Question#define not const? Pin
Waldermort19-Oct-11 3:58
MemberWaldermort19-Oct-11 3:58 
To make my code more readable I'm trying to use a set of defined values in a switch statement. Basically I have a 4 CHAR tag I want to convert to a DWORD.

//#define _makeTag(a,b,c,d) ((#@a << 24) | (#@b << 16) | (#@c << 8) | #@d)
//#define tag_cmap    _makeTag(c,m,a,p)
#define _makeTag(x) ((#x[0] << 24) | (#x[1] << 16) | (#x[2] << 8) | #x[3])
#define tag_cmap    _makeTag(cmap)

In the above I have a 4 CHAR string "cmap" which in DWORD form should be 0x636d6170. However when using in a switch statement the compiler complains that it's not constant. The commented line works, however I believe it to be unreadable.

Any suggestions?

My previous method was to use a union but that required a loop over all the values, hence slow code.
Waldermort

AnswerRe: #define not const? Pin
TheGreatAndPowerfulOz19-Oct-11 5:14
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GeneralRe: #define not const? Pin
Waldermort19-Oct-11 5:48
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AnswerRe: #define not const? Pin
«_Superman_»19-Oct-11 16:39
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GeneralRe: #define not const? Pin
Waldermort20-Oct-11 1:42
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GeneralRe: #define not const? Pin
«_Superman_»20-Oct-11 2:19
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AnswerRe: #define not const? Pin
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QuestionTCP Communication Pin
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