Re: How do I do generic programming in C?

[swengineer001@gmail.com]

>

So... is there any way of emulating templates in C?
Or do I just have to live with duplicate functions?
>
--
Cheers,
Robbie Hatley
lonewolf aatt well dott com
www dott well dott com slant user slant lonewolf slant

Why not use a structure containing a type value and a union of the 2
structures that can be passed:

typedef enum
{
firststructure = 1,
secondstructure = 2
} MyStructures;

typedef struct
{
..........
} structure1;
typedef struct
{
........
} structure2;

typedef union
{
structure1 first;
structure2 second;
} MyUnion;

typedef struct
{
MyStructures structur_type;
MyUnion TheStructure;
} TheArgument;

Obviously you would want to name everything appropriately.

[Peter Nilsson]

Re: How do I do generic programming in C?

swengineer001@g mail.com wrote:

So... is there any way of emulating templates in C?
Or do I just have to live with duplicate functions?

>
Why not use a structure containing a type value and a union
of the 2 structures that can be passed:

<snip>

typedef union
{
structure1 first;
structure2 second;
} MyUnion;
>
typedef struct
{
MyStructures structur_type;
MyUnion TheStructure;
} TheArgument;

Two seconds thought should tell you why this is not
a good idea for converting one struct type to another.

--
Peter

[soscpd@terra.com.br]

Re: How do I do generic programming in C?

Dummy way:

int Setup1400 (setup1400_t const *exp_in, setup_t *exp_out, setup_t
const *ext_in, setup1400_t *ext_out)
{

if (exp_in)
do ext_in related stuff
else
do ext_in related stuff

if (!in || !out) return 666;

memset(out, 0, sizeof(*out));

out->CoolStages = in->CoolStages;
out->HeatStages = in->HeatStages;
out->StageWidth = in->StageWidth;
out->TimePeriods = in->TimePeriods;
(several hundred more lines of "out->foo = in->foo;")

return 42;

} // end ExpandSetupFrom 1400()