cwist_err.h

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#ifndef __CWIST_ERR_H__
#define __CWIST_ERR_H__
 
#include <stdint.h>
#include <stdbool.h>
#include <cjson/cJSON.h>
 
struct cwist_sstring;
 
typedef enum cwist_errtype_t {
    CWIST_ERR_INT8, 
    CWIST_ERR_INT16, 
    CWIST_ERR_INT32,
    CWIST_ERR_INT64,
#if (defined(__clang__) || defined(__GNUC__)) && defined(USE_128BIT_ERRCODE)
    CWIST_ERR_INT128,
#endif
    CWIST_ERR_UINT8, 
    CWIST_ERR_UINT16,
    CWIST_ERR_UINT32,
    CWIST_ERR_UINT64,
#if (defined(__clang__) || defined(__GNUC__)) && defined(USE_128BIT_ERRCODE)
    CWIST_ERR_UINT128,
#endif
 
    CWIST_ERR_STRING,
    CWIST_ERR_JSON,
    CWIST_ERR_FLOAT,
    CWIST_ERR_DOUBLE,
} cwist_errtype_t;
 
typedef struct __prim_cwist_error_t {
  /* These types are widely used when handling internal errcodes.
     * User-oriented errors are beautified as JSON.
     */
    int8_t err_i8;
    int16_t err_i16;
    int32_t err_i32;
    int64_t err_i64;
#if (defined(__clang__) || defined(__GNUC__)) && defined(USE_128BIT_ERRCODE)
    __int128 err_i128;
#endif
 
  /* Unsigned error types. These types are often utilised when handling raw bytes;
     * in many cases, these kinds of errors are hard to find on modern web development.
     */
    uint8_t err_u8;
    uint16_t err_u16;
    uint32_t err_u32;
    uint64_t err_u64;
 
#if (defined(__clang__) || defined(__GNUC__)) && defined(USE_128BIT_ERRCODE)
    unsigned __int128 err_u128;
#endif
    struct cwist_sstring *err_string;
    cJSON *err_json;
 
} __prim_cwist_error_t;
 
typedef struct cwist_error_t {
    cwist_errtype_t errtype;
    __prim_cwist_error_t error;
} cwist_error_t;
 
static inline bool cwist_error_is_ok(const cwist_error_t *err) {
    if (!err) return true;
    switch (err->errtype) {
        case CWIST_ERR_INT8: return err->error.err_i8 == 0;
        case CWIST_ERR_INT16: return err->error.err_i16 == 0;
        case CWIST_ERR_INT32: return err->error.err_i32 == 0;
        case CWIST_ERR_INT64: return err->error.err_i64 == 0;
        case CWIST_ERR_UINT8: return err->error.err_u8 == 0;
        case CWIST_ERR_UINT16: return err->error.err_u16 == 0;
        case CWIST_ERR_UINT32: return err->error.err_u32 == 0;
        case CWIST_ERR_UINT64: return err->error.err_u64 == 0;
        case CWIST_ERR_STRING: return err->error.err_string == NULL;
        case CWIST_ERR_JSON: return err->error.err_json == NULL;
        default: return false;
    }
}
 
cwist_error_t make_error(cwist_errtype_t type);
 
bool cwist_error_is_ok_extern(const cwist_error_t *err);
 
#endif