jkii.h

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#ifndef JKII_H
#define JKII_H

#include <jsmn.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef jsmntok_t jkii_token_t;

typedef struct jkii_resource_t {

    jkii_token_t *tokens;

    size_t tokens_num;

} jkii_resource_t;

typedef jkii_resource_t*
    (*JKII_CB_RESOURCE_ALLOC)(
        size_t required_size);

typedef void (*JKII_CB_RESOURCE_FREE)(
    jkii_resource_t* resource);

typedef enum jkii_boolean_t {
    JKII_FALSE,
    JKII_TRUE
} jkii_boolean_t;

typedef enum jkii_parse_err_t {

    JKII_ERR_OK,

    JKII_ERR_PARTIAL,

    JKII_ERR_ROOT_TYPE,

    JKII_ERR_TOKENS_SHORTAGE,

    JKII_ERR_INVALID_INPUT,

    JKII_ERR_ALLOCATION,
} jkii_parse_err_t;

typedef enum jkii_field_err_t {
    JKII_FIELD_ERR_OK,

    JKII_FIELD_ERR_TYPE_MISMATCH,

    JKII_FIELD_ERR_NOT_FOUND,

    JKII_FIELD_ERR_COPY,

    JKII_FIELD_ERR_NUM_OVERFLOW,

    JKII_FIELD_ERR_NUM_UNDERFLOW
} jkii_field_err_t;

typedef enum jkii_field_type_t {

    JKII_FIELD_TYPE_ANY,

    JKII_FIELD_TYPE_INTEGER,

    JKII_FIELD_TYPE_LONG,

    JKII_FIELD_TYPE_DOUBLE,

    JKII_FIELD_TYPE_BOOLEAN,

    JKII_FIELD_TYPE_NULL,

    JKII_FIELD_TYPE_STRING,

    JKII_FIELD_TYPE_OBJECT,

    JKII_FIELD_TYPE_ARRAY
} jkii_field_type_t;

typedef struct jkii_field_t {

    const char* name;

    const char* path;

    jkii_field_err_t result;

    jkii_field_type_t type;

    size_t start;

    size_t end;

    union {

        char* string;

        int int_value;

        long long_value;

        double double_value;

        jkii_boolean_t boolean_value;
    } field_copy;

    size_t field_copy_buff_size;

} jkii_field_t;

jkii_parse_err_t jkii_parse(
        const char* json_string,
        size_t json_string_len,
        jkii_field_t* fields,
        jkii_resource_t* resource);

jkii_parse_err_t jkii_parse_with_allocator(
    const char* json_string,
    size_t json_string_len,
    jkii_field_t* fields,
    JKII_CB_RESOURCE_ALLOC cb_alloc,
    JKII_CB_RESOURCE_FREE cb_free);

#ifdef __cplusplus
}
#endif

#endif