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Re: Manage C structures

• Posted by jmduro Sep 25, 2022
• 667 views

sequence r = allocateStructure(rect) 
sequence rs = readStructure(r) 
 
for i = 1 to length(rs)  do 
    printf(1,"%s",{i}) 
end for 

There were many little errors in your test program:

• you created a structure but didn't write anything in it
• you read an index {i} instead of a structure member {rs[i]}
• you printed a sequence (%s) but you wrote integers (%d)

Here is the corrected code.

include std/dll.e  
include std/machine.e  
include std/console.e  
  
include common.e  
include structs.e  
  
sequence rect = "struct _rect {" &  
		"int x;" &  
		"int y;" &  
		"int w;" &  
		"int h;" &  
		"} RECT;"  
  
sequence r = allocateStructure(rect)  
writeStructure(r, {10, 20, 50, 100} )  
sequence rs = readStructure(r)  
  
for i = 1 to length(rs)  do  
    printf(1,"%d ",{rs[i]})  
end for  
  
freeStructure(r) 
maybe_any_key() 

Jean-Marc