Synopsis

Structure used to store all possible data types.

Prototype

 #include "uemf.h"

 typedef struct {

    union {
        char    bool;
        char    byteint;
        short   shortint;
        char    percent;
        long    integer;
        long    hex;
        long    octal;
        long    big[2];
        double  floating;
        char_t  *string;
        char    *bytes;
        char_t  *errmsg;
        void    *symbol;
    } value;

    value_type_t    type;

    unsigned int    valid;
    unsigned int    allocated;      /* String was balloced */

} value_t;


typedef enum {
    undefined   = 0,
    byteint     = 1,
    shortint    = 2,
    integer     = 3,
    hex         = 4,
    percent     = 5,
    octal       = 6,
    big         = 7,
    bool        = 8,
    floating    = 9,
    string      = 10,
    bytes       = 11,
    symbol      = 12,
    errmsg      = 13
} value_type_t;

Description

The value_t type is used heavily in the GoAhead EMF database API.

Example

/********************************************/
/*
 *	Initialize a boolean value.
 */

value_t valueBool(int value)
{
    value_t	v = VALUE_VALID;

    v.type = bool;
    v.value.bool = (char) value;
    return v;
}

Stability Classification

Stable.

See Also

valueFree