Re: [Vala] How to properly define struct in manually written VAPI?

[Al Thomas <astavale yahoo co uk>]

      From: "marcin saepia net" <marcin saepia net>
 Sent: Wednesday, 2 March 2016, 10:19
 Subject: [Vala] How to properly define struct in manually written VAPI?
   
I need to write VAPI for jansson JSON library. I have already started (
https://github.com/akheron/jansson/pull/273) and generally speaking it
works fine but I have an issue with covering one struct.

In C code there's the following struct:

#define JSON_ERROR_TEXT_LENGTH    160
#define JSON_ERROR_SOURCE_LENGTH  80


Bind as:[CCode (cname = "int", cprefix = "JSON_ERROR_", has_type_id = false)]
public enum JsonErrorLengths {
    TEXT_LENGTH,
    SOURCE_LENGTH
}See: https://wiki.gnome.org/Projects/Vala/LegacyBindings#Enums_and_Flags

typedef struct {
    int line;
    int column;
    int position;
    char source[JSON_ERROR_SOURCE_LENGTH];
    char text[JSON_ERROR_TEXT_LENGTH];
} json_error_t;


Try binding as:[CCode( cname = "json_error_t", has_type_id = false )]public struct  JsonError {  public int 
line;  public int column;  public int position;  public uint8 source[ JsonErrorLengths.SOURCE_LENGTH ];  
public uint8 text[ JsonErrorLengths.TEXT_LENGTH ];
}

or you could try using:[CCode (array_length_cexpr = "JSON_ERROR_SOURCE_LENGTH")]See: 
https://wiki.gnome.org/Projects/Vala/LegacyBindings#Arrays-1 
I hope that helps,
Al